Improvements on co-channel sidelink LTE V2V and DSRC communication

Improvement in co-existence of the LTE device-to-device communication with another device-to-device communication method is desired. The apparatus selects a countdown number within a size of a contention window including a plurality of slots before a target subframe. The apparatus determines whether each slot of the plurality of slots is idle or utilized while waiting for the target subframe. The apparatus counts down the countdown number during each of the determined idle slots. The apparatus determines whether the countdown number has reached a threshold number before the target subframe. The apparatus performs, when the countdown number is determined to have reached the threshold number, one of: deferring from transmitting until the target subframe, or transmitting a CUBS until a next subframe or the target subframe.

Using method of GIS product inspection instrument

The invention discloses a use method of a GIS product inspection instrument, and the method comprises the following steps: placing a GI product in a fixed seat at the right side, driving the fixed seat to move through a sliding rail disposed on a fixed frame, enabling the fixed seat to be close to the right side of a detector, placing another GI product in a fixed seat at the left side, and enabling the other GI product to be close to the right side of the detector; the sliding rail arranged on the fixing frame drives the fixing base to move so that the fixing base can be close to the left side of the detector, and after the detector is connected with two GI products, the electrical performance experiment of the GI products is completed through partial discharge of the detector. Through the driving slide rail and the driven slide rail, the fixed seats on the two sides of the detector can maintain the position of a unified center line in the process of moving close to the detector, so that ...

DISCOVERY PREAMBLE CONTENT FOR A DEVICE DISCOVERY PROCEDURE

Techniques are described for performing beam sweep procedures as part of a device discovery procedure. A communication device may receive a discovery preamble as part of a device discovery procedure. The discovery preamble may include information indicating that a discovery message will be transmitted. The communication device may determine whether to monitor for the discovery message of the device discovery procedure based at least in part on receiving the discovery preamble. The communication device may monitor for the discovery message based at least in part on the determination. 1. A method for wireless communication , comprising:receiving a discovery preamble as part of a device discovery procedure, wherein the discovery preamble includes information indicating that a discovery message will be transmitted;determining whether to monitor for the discovery message of the device discovery procedure based at least in part on receiving the discovery preamble;identifying a beam configuration of the discovery message based at least in part on receiving the discovery preamble; andmonitoring for the discovery message based at least in part on the determination, wherein monitoring for the discovery message is based at least in part on identifying the beam configuration.2. The method of claim 1 , further comprising:identifying one or more characteristics of the discovery message based at least in part on receiving the discovery preamble, wherein determining whether to monitor for the discovery message is based at least in part on identifying the one or more characteristics of the discovery message.3. The method of claim 1 , further comprising:identifying a preamble identifier based at least in part on receiving the discovery preamble, wherein determining whether to monitor for the discovery message is based at least in part on identifying the preamble identifier.4. The method of claim 1 , further comprising:identifying a discovery mode of a transmitting device based at ...

TECHNIQUES FOR REPORTING BUFFER STATUS IN WIRELESS COMMUNICATIONS

Aspects described herein generally relate to communicating buffer status reports (BSR) in wireless communications. A BSR can be generated at a device indicating a size of each of a plurality of messages stored in a buffer of the device for communicating from the device to one or more other devices. The BSR can be transmitted to a base station to request resources for communicating one or more of the plurality of messages to the one or more other devices.

Methods to enable efficient intra-platoon communication

Methods, systems, and devices for wireless communication are described. A user equipment (UE), e.g., a lead platooning vehicle configured for wireless communications, may determine a communication resource requirement for a group of platooning vehicles. The communication resource requirement may be based at least in part on a number of vehicles forming the group of platooning vehicles and a communication range of at least a portion of the vehicles. The UE may identify, based at least in part on the identified communication resource requirement, an assignment of time-frequency radio resources to use for inter-vehicle communications in the group of platooning vehicles. The UE may transmit an indication of the assignment of time-frequency radio resources to the group of platooning vehicles.

Techniques for managing a resource pool in wireless communications

Aspects described herein generally relate to managing resource pools in wireless communications to optimize the use of those resources for reducing latency in transmissions. The described aspects include receiving, at a user equipment (UE), an alternative resource pool information signal from a network entity; selecting, at the UE, a first control resource from a first frequency portion of the control resource pool based on the alternative resource pool information signal; transmitting, at the UE, the first control resource from the first frequency portion of the control resource pool; selecting, at the UE, a second control resource from a second frequency portion of the control resource pool based on the first control resource; and transmitting, at the UE, the second control resource from the second frequency portion of the control resource pool.

Synchronization for device-to-device positioning in wireless networks

NR discovery resource pool configuration for CV2X

Methods, apparatuses, and computer-readable mediums for wireless communication are disclosed by the present disclosure. In an example, a host device may determine a pool of preconfigured resources for discovery. The preconfigured resources are designated for one or more of: a discovery preamble, a query signal, a discovery message, and a random access preamble. The host device may transmit the discovery preamble on one or more resources designated for the discovery preamble. A client device may receive the discovery preamble and determine that the client device is interested in receiving information regarding the host device. The client device may transmit a query signal if interested. The host device may determine whether the query signal is received on a resource designated for the query signal in response to the discovery preamble. The host device may transmit a discovery message in response to receiving the query signal.

Synchronization for device-to-device positioning in wireless networks

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a UE. The apparatus may transmit a message in a first subset of a set of resources. The message may include a position of the apparatus and a resource ID indicating at least one symbol in a second subset of the set of resources for transmitting a sequence. The apparatus may transmit the sequence in the at least one symbol in the second subset of the set of resources identified by the resource ID, receive at least one other sequence, adjust a transmission timing based on the received at least one other sequence, and transmit, based on the adjusted transmission timing, the sequence in one or more symbols in a third subset of the set of resources.

Autonomous resource selection for vehicle-to-vehicle communications

Various aspects related to selecting a resource selection procedure for V2V communications are described. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus for selecting a resource selection procedure for V2V transmissions, is described. The apparatus, e.g., a UE, may be configured to identify that recent sensing history information at the UE is unavailable for a sensing based resource selection procedure. The UE may be further configured to select, in response to identifying that the recent sensing history information is unavailable, a resource selection procedure based on configuration information obtained from a network entity. In various configurations, the UE may select a resource for a V2V transmission based on the resource selection procedure selected based on the configuration information.

SCHEDULING ASSIGNMENT TRANSMISSIONS IN DEVICE-TO-DEVICE COMMUNICATIONS

Techniques for scheduling assignment (SA) transmissions in device-to-device (D2D) communications are described. A D2D user equipment (UE) may use a block of time resources for SA transmissions. A D2D UE may transmit an SA transmission relatively quickly after determining that D2D data is to be transmitted to another D2D UE, relative to having to wait for specified time resources to send an SA transmission. The D2D data may then be transmitted following the SA transmission, reducing latency for transmission of the D2D data. It may be desirable for vehicle-to-vehicle (V2V) transmissions to have a relatively low latency to provide data from one vehicle to another with sufficient time for a vehicle to take action while moving at relatively high rates of speed.

METHODS AND APPARATUS FOR ENABLING CID REUSE IN LTE BASED D2D COMMUNICATIONS

A method, an apparatus, and a computer program product for wireless communication are provided in connection with minimizing D2D RTS/CTS signaling overhead resource usage. In one example, a WAN entity is equipped to receive one or more channel gain values from a plurality of UEs, determine that a CID can be reused by multiple D2D links based on the received one or more channel gain values, and transmit information indicating that the CID may be reused. In another example, a UE is equipped to measure a direct power signals and an inverse power echoes on a CID used for a link formed between a third and fourth UE, and determine that the CID may potentially be reused by a link formed with a second UE for D2D RTS/CTS signaling, based at least in part on the measured direct power signals, measured the inverse power echoes, and a SIR threshold. 1. A method of communications , comprising:receiving, by a wide area network (WAN) entity, one or more channel gain values from a plurality of user equipments (UEs);determining that a connection identifier (CID) can be reused based on the received one or more channel gain values; andtransmitting information indicating that the CID may be reused.2. The method of claim 1 , wherein the plurality of UEs includes at least two UE pairs (AB claim 1 , CD) claim 1 , wherein the determining comprises:determining that interference from UE C to UE A and from UE D to UE A is less than a first threshold value, and interference from UE C to UE B and from UE D to UE B is less than a second threshold value.3. The method of claim 2 , wherein the one or more channel gain values include a channel gain between UE C and UE A and a channel gain value between UE B and UE A claim 2 , wherein the interference from UE C to UE A comprises a transmission power of UE C multiplied by the channel gain between UE C and UE A claim 2 , and wherein the first threshold value comprises a decoding constant value (γ) multiplied by a transmission power of UE B and further ...

CARRIER-PHASE POSITIONING IN CELLULAR NETWORKS

A method for position determination based on carrier-phase measurements is disclosed. The method comprises receiving one or more downlink signals transmitted from a base station (BS) during a downlink period (410), wherein the downlink signals are modulated using a downlink carrier wave, measuring, during the downlink period, a first carrier phase associated with the downlink carrier wave (430), estimating, during an uplink period subsequent to the downlink period, an integer ambiguity (IA) change (470), and measuring, during a later downlink period subsequent to the uplink period, a second carrier phase based on the resolved first carrier phase and the estimated IA change (490).

DEMODULATION REFERENCE SIGNAL DESIGN FOR VEHICLE-TO-VEHICLE COMMUNICATION

Various features described herein relate to DM-RS design for a control channel and a data channel that maybe used for vehicular communications. In an aspect, a UE may determine a base DM-RS sequence associated with a control channel for V2V communication. The UE may further determine a DM-RS sequence based on the base DM-RS sequence and an identity of the UE, and transmit a plurality of DM-RS symbols within the control channel in a subframe using the DM-RS sequence. In another aspect, a UE may generate a plurality of DM-RS sequences, each DM-RS sequence maybe generated for a corresponding DM-RS symbol of a plurality of DM-RS symbols associated with a data channel for V2V communication based on a DM-RS symbol number of the corresponding DM-RS symbol. The UE may transmit the plurality of DM-RS symbols within the data channel in a subframe using the plurality of DM- RS sequences.

CONFIGURING MULTI-CHANNEL TRANSMISSION FOR RANGING ACCURACY

... 12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 18 October 2018 (18.10.2018) W I PO I PCT omit VIII °nolo Oil mo 1101 VIII oimIE (10) International Publication Number WO 2018/190982 Al (51) International Patent Classification: H04W 4/02 (2018.01) H04W 72/04 (2009.01) H04W 4/46 (2018.01) H04W 4/40 (2018.01) H04W 4/44 (2018.01) GO1S 5/00 (2006.01) (21) International Application Number: PCT/US2018/022700 (22) International Filing Date: 15 March 2018 (15.03.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 20170100177 13 April 2017 (13.04.2017) GR 15/917,424 09 March 2018 (09.03.2018) US (71) Applicant: QUALCOMM INCORPORATED [US/US]; ATTN: International IP Administration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). (72) Inventors: JIANG, Libin; 5775 Morehouse Drive, San Diego, California 92121-1714 ...

TECHNIQUES AND APPARATUSES FOR BEAM-BASED SCHEDULING OF VEHICLE-TO-EVERYTHING (V2X) COMMUNICATIONS

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter user equipment may determine a beam to be used to transmit a vehicle-to-everything (V2X) communication to a receiver UE; may determine one or more eligible resource blocks of the beam that are candidates for the V2X communication based at least in part on a schedule associated with the beam; may transmit, to the receiver UE, a proposed schedule that indicates the one or more eligible resource blocks of the beam that are candidates for the V2X communication; and may transmit the V2X communication to the receiver UE via the beam based at least in part on transmitting the proposed schedule. Numerous other aspects are provided.

Expression of pathologic change retinal nerve cell heat shock protein

The present invention relates to a kind of glaucoma treating method. In the pupil thermotherapy, near infrared diode laser is used to heat eyeground retina of the glaucoma patient through pupil and the laser spot diameter, irradiation energy and irradiation time are regulated to reach temperature of about 41 deg.c at the irradiated part, so as to promote the expression of heat shock protein in the retina tissue without damaging the normal tissue. The heat shock protein resists retina ganglionic cell apoptosis by means of endogenous cell protecting mechanism to reach the aim of preventing and treating retina pathologic change of glaucoma. The present invention provides one new glaucoma treating mode.

Method and system for automatically calibrating image of lottery recognizer

The invention discloses a method and a system for automatically calibrating an image of a lottery recognizer. The method comprises the steps of A, calibrating a contact image sensor before the contact image sensor leaves the factory; B, performing real-time monitoring and calculation on the lottery image collected by the contact image sensor in use; C, judging whether difference between a real-time gray value of a black area in the lottery image and a black calibration reference value before the contact image sensor leaves the factory is larger than the set proportion, or difference bewteen a real-time gray value of a white area in the lottery image and a white calibration reference value before the contact image sensor leaves the factory is larger than the set proportion, if yes, executing the step D, and otherwise, finishing the process; D, calibrating the lottery image collected by the contact image sensor again with the real-time gray value of the black area in the lottery image and ...

Ranging between a user equipment and a fixed reference node

In an embodiment, a user equipment (UE) receives, from a fixed reference node, at least one round-trip propagation time (RTT) ranging scheduling message indicating a set of downlink (DL) ranging resource assignments and a set of uplink (UL) ranging resource grants, receives one or more DL ranging signals from the fixed reference node on a first set of resources identified by the set of DL ranging resource assignments, and transmits one or more UL ranging signals to the fixed reference node on a second set of resources identified by the set of UL ranging resource grants.

SYNCHRONIZATION FOR V2X CARRIER AGGREGRATION

Power efficient relay discovery protocol

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives discovery resource information from a base station, sends a discovery signal based on the discovery resource information, and receives from at least one user equipment (UE) a request for relaying with the base station based on the discovery signal. The apparatus may also receive a discovery signal from a relay, and send to the relay a request for relaying with a base station based on the discovery signal. The apparatus may further receive a discovery signal from each of a plurality of relays, determine to select one of the plurality of relays based on the discovery signal from each relay, and send to a selected relay a request for relaying with a base station based on the discovery signal when one of the plurality of relays is determined to be selected.

Methods, apparatuses and computer readable media for supporting high speed in vehicle-to-vehicle communication

During device-to-device communication between two devices, a communication transmitted from a first UE to a second UE may not be reliably received by the second UE if the first UE is traveling at high speed. Therefore, a travel speed of a transmitting UE may be considered in determining a transmission configuration. According to an aspect, the UE may determine a travel speed of the UE. The UE may determine, based on the travel speed of the UE, a transmission configuration of the UE for device-to-device communication. The UE may transmit the device-to-device communication based on the transmission configuration.

Enhanced physical layer performance by inter-service information

In an example, a method for wireless communications by a first wireless device, is disclosed comprising obtaining information regarding an environment for wireless communications between the first wireless device and at least one second wireless device and adjusting one or more operating parameters for the wireless communications, based on the information. As described herein, information from one service or application in a first RAT is used by the first wireless device to enhance performance in another service or application in a second RAT by the first wireless device.

Pedestrian positioning via vehicle collaboration

Disclosed are techniques for using ranging signals to determine a position of a pedestrian user equipment (P-UE). In an aspect, a UE receives a plurality of ranging signals transmitted by one or more UEs, measures one or more properties of each of the plurality of ranging signals, and calculates an estimate of the position of the P-UE based on the one or more properties of each of the plurality of ranging signals. In an aspect, the P-UE transmits a plurality of ranging signals, receives a first message and a second message from first and second vehicle UEs (V-UEs), the first and second messages including first and second estimated positions of the P-UE and associated first and second confidences, and calculates an estimate of the position of the P-UE based on the first estimated position, the first confidence, the second estimated position, the second confidence, or a combination thereof.

Methods, apparatuses and computer readable media for supporting high speed in vehicle-to-vehicle communication

During device-to-device communication between two devices, a communication transmitted from a first UE to a second UE may not be reliably received by the second UE if the first UE is traveling at high speed. Therefore, a travel speed of a transmitting UE may be considered in determining a transmission configuration. According to an aspect, the UE may determine a travel speed of the UE. The UE may determine, based on the travel speed of the UE, a transmission configuration of the UE for device-to-device communication. The UE may transmit the device-to-device communication based on the transmission configuration.

Techniques for managing a resource pool in wireless communications

Aspects described herein generally relate to managing resource pools in wireless communications to optimize the use of those resources for reducing latency in transmissions. The described aspects include receiving, at a user equipment (UE), an alternative resource pool information signal from a network entity; selecting, at the UE, a first control resource from a first frequency portion of the control resource pool based on the alternative resource pool information signal; transmitting, at the UE, the first control resource from the first frequency portion of the control resource pool; selecting, at the UE, a second control resource from a second frequency portion of the control resource pool based on the first control resource; and transmitting, at the UE, the second control resource from the second frequency portion of the control resource pool.

Location and listen-before-schedule based resource allocation for vehicle-to-vehicle communication

Methods, apparatus, and computer-readable mediums for wireless communication are provided. One apparatus is configured to receive at least one SA from at least one UE. The apparatus is further configured to determine an energy associated with each at least one SA. The apparatus is also configured to rank data transmission time-frequency resources based on the determined energy associated with said each received at least one SA. Each at least one SA are associated with a different subset of the data transmission time-frequency resources. The apparatus is further configured to select a set of data transmission time-frequency resources based on the ranked data transmission time-frequency resources and to send a data transmission on the selected set of data transmission time-frequency resources. Another apparatus is configured to partitioning time-frequency resources into different resource groups, to divide UEs into UE groups based on location, and map the UE groups to the resource groups.

Improvements on co-channel sidelink LTE V2V and DSRC communication

Improvement in co-existence of the LTE device-to-device communication with another device-to-device communication method is desired. The apparatus selects a countdown number within a size of a contention window including a plurality of slots before a target subframe. The apparatus determines whether each slot of the plurality of slots is idle or utilized while waiting for the target subframe. The apparatus counts down the countdown number during each of the determined idle slots. The apparatus determines whether the countdown number has reached a threshold number before the target subframe. The apparatus performs, when the countdown number is determined to have reached the threshold number, one of: deferring from transmitting until the target subframe, or transmitting a CUBS until a next subframe or the target subframe.

Method and apparatus for determining vehicle location in vehicle-to-vehicle communications

A method for developing and reporting enhanced user equipment (UE) location information includes obtaining a global positioning system (GPS) location for a user equipment (UE), determining a location of at least one radio frequency (RF) antenna relative to the GPS location, developing a reference frame based at least in part on the location of the at least one RF antenna, determining a location of a structural element of the UE, and transmitting the GPS location, the location of the at least one RF antenna, and the location of the structural element of the UE.

Wireless resource allocation for a vehicle acting as a base station

Aspects of the disclosure relate to a vehicle, or a device or system connected to the vehicle, that enables the vehicle to act as a base station in a wireless communication network. The vehicle includes an access interface transceiver configured to communicate with devices within its passenger cabin, and a backhaul interface transceiver configured to communicate with the wireless communication network. By acting as a base station, the vehicle can establish and provide connectivity between the devices in its passenger cabin and the wireless communication network via the access transceiver and backhaul transceiver.

Techniques for connection setup of mmWave-based V2X communication systems

Various aspects described herein relate to techniques for connection setup procedures in a wireless communication system (e.g., a vehicle-to-everything (V2X) communication system in millimeter wave). In an aspect, the method includes identifying information for V2X communications, and initiating a random access procedure based on the identified information. The method further includes identifying one or more random access channel (RACH) resources based on the information, identifying one or more RACH response resources based on the one or more RACH resources, and performing directional communications using at least the one or more RACH resources or the one or more RACH response resources.

Apparatus and method for scheduling delayed ACKs/NACKs in LTE cellular systems

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be an eNB. The eNB informs UE(s) of a change in at least one of a first configuration for transmission of ACKs/NACKs by the UE(s) for DL transmissions received by the UE(s) or a second configuration for reception of ACKs/NACKs by the UE(s) for UL transmissions sent by the UE(s). The eNB indicates to the UE(s) one or more resources in which the UE(s) is to transmit the ACKs/NACKs for the received DL transmissions or is to receive the ACKs/NACKs for sent UL transmissions. The eNB indicates to the UE(s) a subset of the DL transmissions to the UE(s) for which the UE(s) is to transmit the ACKs/NACKs or a subset of the UL transmissions by the UE(s) for which the UE(s) is to receive the ACKs/NACKs.

Synchronization for device-to-device positioning in wireless networks

Autonomous resource selection for vehicle-to-vehicle communications

Various aspects related to selecting a resource selection procedure for V2V communications are described. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus for selecting a resource selection procedure for V2V transmissions, is described. The apparatus, e.g., a UE, may be configured to identify that recent sensing history information at the UE is unavailable for a sensing based resource selection procedure. The UE may be further configured to select, in response to identifying that the recent sensing history information is unavailable, a resource selection procedure based on configuration information obtained from a network entity. In various configurations, the UE may select a resource for a V2V transmission based on the resource selection procedure selected based on the configuration information.

IN-MOTION INITIALIZATION OF ACCELEROMETER FOR ACCURATE VEHICLE POSITIONING

Techniques provided herein are directed toward addressing these and other issues by providing robust means for initializing an accelerometer that can take place even while a vehicle is in motion. Specifically, linear acceleration and velocity data can be estimated from wheel speeds, and angular velocity can be estimated with a gyroscope. The vehicle's acceleration can then be computed from these estimates, and subtracted from a total acceleration measured by the accelerometer to determine gravitational acceleration, which can then be accounted for in subsequent measurements taken by the accelerometer. A vehicle velocity may also be determined based on the vehicle's estimated angular velocity and linear velocity. Embodiments may also employ techniques for translating measurements taken in one coordinate frame to another coordinate frame for estimate determination and/or outlier compensation. 1. A method of initializing an accelerometer located on a vehicle , the method comprising:estimating a total acceleration based on measurements from the accelerometer taken during a period of time;estimating a linear velocity and an acceleration based on wheel rotation measurements of the vehicle taken during the period of time;estimating an angular velocity based on measurements from a gyroscope located on the vehicle and taken during the period of time;determining vehicle acceleration based on the estimated linear velocity, estimated total acceleration, and estimated angular velocity;determining gravitational acceleration based on the estimated total acceleration and determined vehicle acceleration; andoffsetting, with a processing unit located on the vehicle, a subsequent measurement of the accelerometer based on the determined gravitational acceleration.2. The method of claim 1 , further comprising:determining a vehicle velocity using the estimated angular velocity and estimated linear velocity; andusing the determined vehicle velocity to initialize a navigation filter.3. The ...

Carrier-phase positioning in cellular networks

A method for position determination based on carrier-phase measurements is disclosed. The method comprises receiving one or more downlink signals transmitted from a base station (BS) during a downlink period, wherein the downlink signals are modulated using a downlink carrier wave, measuring, during the downlink period, a first carrier phase associated with the downlink carrier wave, estimating, during an uplink period subsequent to the downlink period, an integer ambiguity (IA) change, and measuring, during a later downlink period subsequent to the uplink period, a second carrier phase based on the resolved first carrier phase and the estimated IA change.

Power efficient relay discovery protocol

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives discovery resource information from a base station, sends a discovery signal based on the discovery resource information, and receives from at least one user equipment (UE) a request for relaying with the base station based on the discovery signal. The apparatus may also receive a discovery signal from a relay, and send to the relay a request for relaying with a base station based on the discovery signal. The apparatus may further receive a discovery signal from each of a plurality of relays, determine to select one of the plurality of relays based on the discovery signal from each relay, and send to a selected relay a request for relaying with a base station based on the discovery signal when one of the plurality of relays is determined to be selected.

Transfer control method and device for automobile crash dummy skin manufacturing mold

The invention discloses a transfer control method and device for an automobile crash dummy skin manufacturing mold, a clamping end of the mold rotates the mold around a first rotation axis and a second rotation axis, the first rotation axis is perpendicular to the second rotation axis, and the control method comprises the steps that instruction information is responded; according to the instruction information, a rotating speed calibration database is called, and a reference rotating speed corresponding to the heating temperature and the rotating duration is obtained; and calculating a first target rotating speed of the clamping end rotating along the first rotating axis and a second target rotating speed of the clamping end rotating along the second rotating axis according to the reference rotating speed. According to the method, the target rotating speed which is most matched with the mold is obtained through operation of the content of the instruction information, calling of the rotating ...

Methods and apparatus for efficient sensor data sharing in a vehicle-to-vehicle (V2V) network

Various aspects of the present disclosure relate to vehicle-to-vehicle (V2V) data sharing. The sensor data collected from each vehicle may be divided into common information and detailed information. The common information is broadcasted to every other nearby vehicle. Based on the received common information other vehicles may express interest in some particular detailed information. Unicast and/or multicast sessions may be set up to share the detailed information with the interested vehicles.

Synchronized radio transmission for vehicle platooning

Wireless communications systems and methods related to transmission of platoon information. A first vehicle in a vehicle platoon obtains a first radio resource spanning a frequency channel and a time period for synchronous transmission with at least a second vehicle in the vehicle platoon. The first vehicle transmits, synchronously with at least the second vehicle, information associated with the vehicle platoon in the frequency channel and the time period of the first radio resource. The first vehicle may obtain the first radio resource by requesting a transmission request from a wireless communication device and receiving a transmission grant indicating the first radio resource. Alternatively, the first vehicle may obtain the first radio resource by selecting the first radio resource based on at least one of a sensing report or a resource reservation received from the second vehicle.

Device-to-device ranging and positioning

NR RACH MSG1 CONFIGURATION FOR CV2X

Methods, apparatuses, and computer-readable mediums for wireless communication are disclosed by the present disclosure. In an example, the present disclosure includes selecting, at a first device, a Random Access Channel (RACH) preamble identifier (ID) from a set of RACH preamble IDs based on a discovery procedure associated with a second device, wherein each RACH preamble ID from the set of RACH preamble IDs corresponds to at least one RACH preamble and is associated with the second device; and transmitting, from the first device, a RACH preamble associated with the selected RACH preamble ID to the second device. 1. A method of wireless communications , comprising:selecting, at a first device, a Random Access Channel (RACH) preamble identifier (ID) from a set of RACH preamble IDs based on a discovery procedure associated with a second device, wherein each RACH preamble ID from the set of RACH preamble IDs corresponds to at least one RACH preamble and is associated with the second device; andtransmitting, from the first device, a RACH preamble associated with the selected RACH preamble ID to the second device.2. The method of claim 1 , wherein selecting the RACH preamble ID from the set of RACH preamble IDs includes determining the set of RACH preamble IDs based on at least one of a discovery message or a discovery preamble corresponding to the discovery procedure associated with the second device.3. The method of claim 2 , wherein the discovery message includes at least one indication corresponding to the set of RACH preamble IDs associated with the second device.4. The method of claim 2 , wherein the discovery message includes at least one device-specific content that is mapped to one or more sets of RACH preamble IDs; andwherein selecting the RACH preamble ID from the set of RACH preamble IDs includes determining a mapping between the at least one device-specific content and the set of RACH preamble IDs, the one or more sets of RACH preambles IDs includes the set ...

CONFIGURING MULTI-CHANNEL TRANSMISSION FOR RANGING ACCURACY

Methods, systems, and devices for wireless communication are described. A wireless device may identify a configuration for transmitting ranging signals in a vehicle-based communication system. The configuration may identify a plurality of channels to be used for the ranging signals and timing for the ranging signals. The wireless device may transmit the configuration to a receiver and transmit ranging signals based at least in part on the configuration. The receiver may use the ranging signals to determine a distance between the receiver and the wireless device. The receiver may use the determined distance to update positioning information or operate a motor vehicle. 1. A method for wireless communication , comprising:identifying, by a transmitter, a configuration for transmitting ranging signals in a vehicle-based communication system, the configuration identifying a plurality of channels to be used for the ranging signals and timing for the ranging signals; andtransmitting the configuration to a receiver.2. The method of claim 1 , further comprising:transmitting the ranging signals on the plurality of channels based at least in part on the configuration.3. The method of claim 2 , further comprising:transmitting the ranging signals simultaneously on the plurality of channels based at least in part on the configuration.4. The method of claim 3 , further comprising:transmitting the ranging signals simultaneously on the plurality of channels comprises using carrier aggregation.5. The method of claim 2 , further comprising:transmitting the ranging signals on the plurality of channels during a transmission interval based at least in part on the configuration, each of the ranging signals being transmitted during a different time period during the transmission interval.6. The method of claim 2 , further comprising:receiving, from the receiver, an indication of a time elapsed between transmission and receipt of the ranging signals, an indication of an arrival time of the ...

On co-channel sidelink LTE V2V and DSRC communication

Improvement in co-existence of the LTE device-to-device communication with another device-to-device communication method is desired. The apparatus selects a countdown number within a size of a contention window including a plurality of slots before a target subframe. The apparatus determines whether each slot of the plurality of slots is idle or utilized while waiting for the target subframe. The apparatus counts down the countdown number during each of the determined idle slots. The apparatus determines whether the countdown number has reached a threshold number before the target subframe. The apparatus performs, when the countdown number is determined to have reached the threshold number, one of: deferring from transmitting until the target subframe, or transmitting a CUBS until a next subframe or the target subframe.

Techniques and apparatuses for beam-based scheduling of vehicle-to-everything (V2X) communications

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter user equipment may determine a beam to be used to transmit a vehicle-to-everything (V2X) communication to a receiver UE; may determine one or more eligible resource blocks of the beam that are candidates for the V2X communication based at least in part on a schedule associated with the beam; may transmit, to the receiver UE, a proposed schedule that indicates the one or more eligible resource blocks of the beam that are candidates for the V2X communication; and may transmit the V2X communication to the receiver UE via the beam based at least in part on transmitting the proposed schedule. Numerous other aspects are provided.

System and method for ranging-assisted positioning of vehicles in vehicle-to-vehicle communications

A method for ranging includes randomly selecting a symbol in each of at least two successive sub-cycles of a ranging cycle, transmitting symbol IDs corresponding to the randomly selected symbols and a sequence ID, and transmitting a ranging signal with the sequence ID on each of the randomly selected symbols.

Dummy shank skin zipper polishing and bonding system and method

The invention relates to the field of automobile dummies, and discloses a polishing and bonding system and method for a dummy shank skin zipper. The system comprises a supporting device, a double-optical-axis ball screw device, a polishing device, a crus skin fixing device and a pressing device. The supporting device is used for providing a supporting effect for the system; the double-optical-axis ball screw device is used for providing a power source for the grinding device. The polishing device is used for polishing the to-be-processed dummy shank skin zipper under the driving of the double-optical-axis ball screw device; the crus skin fixing device is used for fixing a to-be-treated dummy crus skin part; the pressing device is used for pressing a connecting area between the gummed dummy shank skin zipper and the skin so that the dummy shank skin zipper can be bonded with the skin, and the connecting area is gummed after the connecting area between the dummy shank skin zipper and the ...

METHOD AND APPARATUS FOR COEXISTENCE OF PEER TO PEER COMMUNICATION WITH LTE WWAN COMMUNICATION ON DOWNLINK

A method, an apparatus, and a computer program product for wireless communication are provided. A UE for wireless communication determines resource elements, within at least one resource block in a downlink subframe, that carry reference signals from a base station. The UE maps at least one of data or control information to the at least one resource block, punctures the at least one of the data or the control information from the resource elements determined to carry the reference signals, and transmits the at least one resource block to a second UE. 1. A method of wireless communication of a user equipment (UE) , comprising:determining resource elements, within at least one resource block in a downlink subframe, carrying reference signals from a base station;mapping at least one of data or control information to the at least one resource block;puncturing the at least one of the data or the control information from the resource elements determined to carry the reference signals; andtransmitting the at least one resource block to a second UE.2. The method of claim 1 , further comprising determining downlink subframes for peer to peer communication within a set of downlink subframes used for both wireless wide area network (WWAN) communication and peer to peer communication claim 1 , the determined downlink subframes being possibly non-contiguous in the set of downlink subframes claim 1 , wherein the downlink subframe is within one of the determined downlink subframes.3. The method of claim 1 , wherein the wireless communication is in a time division duplex (TDD) system.4. A user equipment (UE) for wireless communication claim 1 , comprising:means for determining resource elements, within at least one resource block in a downlink subframe, carrying reference signals from a base station;means for mapping at least one of data or control information to the at least one resource block;means for puncturing the at least one of the data or the control information from the ...

ON CO-CHANNEL SIDELINK LTE V2V AND DSRC COMMUNICATION

Improvement in co-existence of the LTE device-to-device communication with another device-to-device communication method is desired. The apparatus selects a countdown number within a size of a contention window including a plurality of slots before a target subframe. The apparatus determines whether each slot of the plurality of slots is idle or utilized while waiting for the target subframe. The apparatus counts down the countdown number during each of the determined idle slots. The apparatus determines whether the countdown number has reached a threshold number before the target subframe. The apparatus performs, when the countdown number is determined to have reached the threshold number, one of: deferring from transmitting until the target subframe, or transmitting a CUBS until a next subframe or the target subframe.

TECHNIQUES AND APPARATUSES FOR BEAM-BASED SCHEDULING OF VEHICLE-TO-EVERYTHING (V2X) COMMUNICATIONS

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter user equipment may determine a beam to be used to transmit a vehicle-to-everything (V2X) communication to a receiver UE; may determine one or more eligible resource blocks of the beam that are candidates for the V2X communication based at least in part on a schedule associated with the beam; may transmit, to the receiver UE, a proposed schedule that indicates the one or more eligible resource blocks of the beam that are candidates for the V2X communication; and may transmit the V2X communication to the receiver UE via the beam based at least in part on transmitting the proposed schedule. Numerous other aspects are provided. 1. A method of wireless communication performed by a transmitter user equipment (UE) , comprising:determining a beam to be used to transmit a vehicle-to-everything (V2X) communication to a receiver UE;determining one or more eligible resource blocks of the beam that are candidates for the V2X communication based at least in part on a schedule associated with the beam;transmitting, to the receiver UE, a proposed schedule that indicates the one or more eligible resource blocks of the beam that are candidates for the V2X communication; andtransmitting the V2X communication to the receiver UE via the beam based at least in part on transmitting the proposed schedule.2. The method of claim 1 , wherein the V2X communication is transmitted to the receiver UE using the one or more eligible resource blocks of the beam based at least in part on receiving a confirmation of the proposed schedule from the receiver UE.3. The method of claim 1 , further comprising:receiving a rejection of the proposed schedule from the receiver UE;receiving an updated schedule from the receiver UE;determining a different one or more eligible resource blocks of the beam to be used for the V2X communication based at least in part on the updated schedule; ...

Techniques for connection setup of mmWave-based V2X communication systems

Various aspects described herein relate to techniques for connection setup procedures in a wireless communication system (e.g., a vehicle-to-everything (V2X) communication system in millimeter wave). In an aspect, the method includes identifying information for V2X communications, and initiating a random access procedure based on the identified information. The method further includes identifying one or more random access channel (RACH) resources based on the information, identifying one or more RACH response resources based on the one or more RACH resources, and performing directional communications using at least the one or more RACH resources or the one or more RACH response resources.

LOCATION AND LISTEN-BEFORE-SCHEDULE BASED RESOURCE ALLOCATION FOR VEHICLE-TO-VEHICLE COMMUNICATION

Methods, apparatus, and computer-readable mediums for wireless communication are provided. One apparatus is configured to receive at least one SA from at least one UE. The apparatus is further configured to determine an energy associated with each at least one SA. The apparatus is also configured to rank data transmission time-frequency resources based on the determined energy associated with said each received at least one SA. Each at least one SA are associated with a different subset of the data transmission time-frequency resources. The apparatus is further configured to select a set of data transmission time-frequency resources based on the ranked data transmission time-frequency resources and to send a data transmission on the selected set of data transmission time-frequency resources. Another apparatus is configured to partitioning time-frequency resources into different resource groups, to divide UEs into UE groups based on location, and map the UE groups to the resource groups. 1. A method of wireless communication in a user equipment (UE) , comprising:receiving at least one scheduling assignment (SA) from at least one UE;determining an energy associated with each received at least one SA;ranking data transmission time-frequency resources based on the determined energy associated with said each received at least one SA, said each received at least one SA being associated with a different subset of the data transmission time-frequency resources;selecting a set of data transmission time-frequency resources based on the ranked data transmission time-frequency resources; andsending a data transmission on the selected set of data transmission time-frequency resources.2. The method of claim 1 , wherein a set of subframes associated with the data transmission time-frequency resources are ranked based on the determined energy associated with said each received at least one SA.3. The method of claim 2 , wherein the ranking the data transmission time-frequency ...

System and method for ranging-assisted vehicle positioning

Aspects of the present disclosure are directed to device-to-device (D2D) and, more particularly, vehicle-to-vehicle (V2V) communication in which an efficient ranging protocol allows efficient ranging-assisted vehicle positioning. A vehicle transmits a first slot ID in a first control period, to indicate a first time slot for transmitting a first ranging signal in a ranging cycle including a plurality of time slots. The vehicle transmits the first ranging signal in the first time slot in the ranging cycle. From a second vehicle, the first vehicle receives a second ranging signal in a second time slot that is different from the first time slot in the ranging cycle. The first vehicle determines a first time-of-arrival (ToA) of the second ranging signal when received by the first vehicle, and transmits the first ToA in a second control period.

NR RACH MSG2 RESOURCE CONFIGURATION FOR CV2X

Methods, apparatuses, and computer-readable mediums for wireless communication are disclosed by the present disclosure. In an example, the present disclosure includes receiving, at a second device, a Random Access Channel (RACH) preamble from a first device, the RACH preamble initiates an access procedure between the first device and the second device; selecting, by the second device, a transmission resource associated with a second RACH message based on the RACH preamble; and transmitting, by the second device, the second RACH message on the selected transmission resource to the first device.

HIERARCHICAL COMMUNICATION FOR DEVICE-TO-DEVICE COMMUNICATIONS

Certain aspects of the present disclosure provide techniques for hierarchical communication for device-to-device (D2D) communications. In certain aspects, a method generally includes determining user equipment (UE) data comprising at least one of one or more parameters about the UE, one or more parameters about objects near the UE, or raw sensor data. The method further includes determining a first level for transmitting a first portion of the UE data based on content of the first portion of the UE data. The method further includes determining a first modulation coding scheme associated with the first level based on a mapping of a plurality of levels to a plurality of modulation coding schemes. The method further includes encoding the first portion of the UE data using the first modulation coding scheme and transmitting the first portion of the UE data from the UE to at least one second UE directly. 1. A method for wireless communication , the method comprising:determining, at a user equipment (UE), utilizing one or more sensors of the UE, UE data comprising at least one of one or more parameters about the UE, one or more parameters about objects near the UE, or raw sensor data;determining a first level of a plurality of levels for transmitting a first portion of the UE data based on content of the first portion of the UE data;determining a first modulation coding scheme associated with the first level based on a mapping of the plurality of levels to a plurality of modulation coding schemes;encoding the first portion of the UE data using the first modulation coding scheme; andtransmitting the first portion of the UE data from the UE to at least one second UE directly.2. The method of claim 1 , further comprising mapping the first portion of the UE data to one or more data layers of a multiple-input multiple-output transmission associated with the first level based on a second mapping of the plurality of levels to a plurality of data layers claim 1 , wherein ...

Methods and apparatus for enabling CID reuse in LTE based D2D communications

A method, an apparatus, and a computer program product for wireless communication are provided in connection with minimizing D2D RTS/CTS signaling overhead resource usage. In one example, a WAN entity is equipped to receive one or more channel gain values from a plurality of UEs, determine that a CID can be reused by multiple D2D links based on the received one or more channel gain values, and transmit information indicating that the CID may be reused. In another example, a UE is equipped to measure a direct power signals and an inverse power echoes on a CID used for a link formed between a third and fourth UE, and determine that the CID may potentially be reused by a link formed with a second UE for D2D RTS/CTS signaling, based at least in part on the measured direct power signals, measured the inverse power echoes, and a SIR threshold.

SYNCHRONIZATION FOR V2X CARRIER AGGREGRATION

Features of the present disclosure implementing techniques that allow the user equipment (UE) to autonomously (e.g., without the network control) manage timing synchronization of a plurality of carriers using sidelink synchronization signal (SLSS) from one or more other UEs in order to identify a synchronization source. A synchronization source associated with a frequency carrier from a set of frequency carriers may be selected according to one or more SLSS sync source selection techniques or rules. For instance, the described solution may be utilized to enable UEs to autonomously perform V2X carrier aggregation (CA). In some examples, the synchronization carrier(s) to be searched may be determined based on the SLSS capability of the UE (e.g., transmission and reception of SLSS capabilities of the UE).

Millimeter wave directional discovery signal design

Methods, systems, and devices for wireless communication are described. A transmitting device may select an orthogonal metric based at least in part on at least one of each direction of a plurality of directions to transmit millimeter wave discovery signals or a location parameter associated with the transmitting device. The transmitting device may transmit, in the each direction of the plurality of directions, the millimeter wave discovery signals, where the each transmitted millimeter wave discovery signal has a different orthogonal metric applied that was selected based at least in part on the at least one of the each direction or the location parameter.

Indica-japonica hybrid late rice pot seedling high-yield cultivation method in double-season cultivation mode

The invention discloses a high-yield cultivation method for indica-japonica hybrid late rice pot seedlings in a double-cropping cultivation mode. The method comprises the following steps: 1, seed breeding: (1) seed selection; (2) pretreating the seeds in the step (1); 2, pot tray seedling raising: (1) seedling soil preparation; (2) selecting a sowing time; (3) preparing a rice seedling bed; (4) preparing bowls and trays; 3, rice seedling bed management, wherein rice seedling bed management can be divided into three periods according to the physiological characteristics and morphological characteristics of pot seedlings; (1) sowing to a two-leaf stage; (2) a one-leaf and one-core stage (after full seedling); and (3) from a two-leaf stage to a four-leaf stage. And (4) from a four-leaf stage to transplanting, mainly aiming at improving plant injury resistance and rooting resistance after transplanting. (5) disease and pest control. 4, field transplanting. 5, field management: 1) fertilizer ...

VEHICLE RANGING AND POSITIONING

Methods, systems, and devices for ranging are described. A multi-phase distributed ranging technique includes transmitting and receiving vehicle information messages during a first time interval, where the vehicle information messages include at least a vehicle identifier and resource information. The multi-phase technique further includes transmitting and receiving ranging signals during a second time interval, and determining times of arrival of received ranging signals. A centralized ranging technique includes receiving resource assignments from an access point, transmitting ranging signals according to the resource assignments, and determining times of arrival of received ranging signals. 1. A wireless communication method comprising:initiating a ranging process at a first vehicle;at the first vehicle, during a first time interval, transmitting a vehicle information message including ranging information for the first vehicle and radio information for the first vehicle, wherein ranging information comprises at least a vehicle identifier and wherein the radio information comprises at least an indication of ranging signal transmission resources;at the first vehicle, during the first time interval, receiving vehicle information messages from a plurality of neighbor vehicles, the plurality of neighbor vehicles including at least a first neighbor vehicle and a second neighbor vehicle, wherein the vehicle information message from the first neighbor vehicle includes ranging information for the first neighbor vehicle and radio information for the first vehicle, and wherein the vehicle information message from the second neighbor vehicle includes ranging information for the second neighbor vehicle and radio information for the second vehicle;at the first vehicle, during a second time interval, transmitting a ranging signal according to the radio information for the first vehicle;at the first vehicle, during the second time interval, receiving a plurality of ranging ...

NR DISCOVERY RESOURCE POOL CONFIGURATION FOR CV2X

Methods, apparatuses, and computer-readable mediums for wireless communication are disclosed by the present disclosure. In an example, a host device may determine a pool of preconfigured resources for discovery. The preconfigured resources are designated for one or more of: a discovery preamble, a query signal, a discovery message, and a random access preamble. The host device may transmit the discovery preamble on one or more resources designated for the discovery preamble. A client device may receive the discovery preamble and determine that the client device is interested in receiving information regarding the host device. The client device may transmit a query signal if interested. The host device may determine whether the query signal is received on a resource designated for the query signal in response to the discovery preamble. The host device may transmit a discovery message in response to receiving the query signal. 1. A method of wireless communications , comprising:determining a pool of preconfigured resources for discovery, wherein the preconfigured resources are designated for one or more of: a discovery preamble, a query signal, a discovery message, and a random access preamble;transmitting the discovery preamble on one or more of the preconfigured resources designated for the discovery preamble;determining whether a query signal in response to the discovery preamble is received on one of the preconfigured resources designated for the query signal; andtransmitting a discovery message in response to receiving the query signal.2. The method of claim 1 , further comprising receiving a random access preamble in response to the discovery message.3. The method of claim 1 , further comprising:determining that at least some of the preconfigured resources are unused preconfigured resources for a discovery procedure; andrepurposing the unused preconfigured resources for a non-discovery transmission.4. The method of claim 3 , wherein determining that at least ...

PEDESTRIAN POSITIONING VIA VEHICLE COLLABORATION

Disclosed are techniques for using ranging signals to determine a position of a pedestrian user equipment (P-UE). In an aspect, a UE receives a plurality of ranging signals transmitted by one or more UEs, measures one or more properties of each of the plurality of ranging signals, and calculates an estimate of the position of the P-UE based on the one or more properties of each of the plurality of ranging signals. In an aspect, the P-UE transmits a plurality of ranging signals, receives a first message and a second message from first and second vehicle UEs (V-UEs), the first and second messages including first and second estimated positions of the P-UE and associated first and second confidences, and calculates an estimate of the position of the P-UE based on the first estimated position, the first confidence, the second estimated position, the second confidence, or a combination thereof. 1. A vehicle user equipment (V-UE) , comprising:a memory;at least one transceiver; and receive, via the at least one transceiver, one or more ranging signals transmitted by a pedestrian UE (P-UE);', 'measure one or more properties of each of the one or more ranging signals; and', 'calculate an estimate of the position of the P-UE based on the one or more properties of each of the one or more ranging signals., 'at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to2. The V-UE of claim 1 , wherein the one or more properties of each of the one or more ranging signals comprise a time of arrival (ToA) of each of the one or more ranging signals claim 1 , an angle-of-arrival (AoA) of each of the one or more ranging signals claim 1 , or any combination thereof.3. The V-UE of claim 2 , wherein the ToA of each of the one or more ranging signals is based on a local clock time of the V-UE.4. The V-UE of claim 1 , wherein the at least one processor is further configured to:cause the at least one transceiver to ...

Methods to mitigate inter-platoon interference

Methods, systems, and devices for wireless communication are described. A user equipment (UE), e.g., a vehicle in a group of platooning vehicles configured for wireless communications, may identify a travel direction of the group of platooning vehicles. The UE may identify a set of time-frequency radio resources allocated to the travel direction. The UE may perform inter-vehicle communications with one or more neighboring vehicles of the group of platooning vehicles using the set of time-frequency radio resources.

Synchronization for device-to-device positioning in wireless networks

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a UE. The apparatus may transmit a message in a first subset of a set of resources. The message may include a position of the apparatus and a resource ID indicating at least one symbol in a second subset of the set of resources for transmitting a sequence. The apparatus may transmit the sequence in the at least one symbol in the second subset of the set of resources identified by the resource ID, receive at least one other sequence, adjust a transmission timing based on the received at least one other sequence, and transmit, based on the adjusted transmission timing, the sequence in one or more symbols in a third subset of the set of resources.

METHODS TO MITIGATE INTER-PLATOON INTERFERENCE

Methods, systems, and devices for wireless communication are described. A user equipment (UE), e.g., a vehicle in a group of platooning vehicles configured for wireless communications, may identify a travel direction of the group of platooning vehicles. The UE may identify a set of time-frequency radio resources allocated to the travel direction. The UE may perform inter-vehicle communications with one or more neighboring vehicles of the group of platooning vehicles using the set of time-frequency radio resources. 1. A method for wireless communication , comprising:identifying a travel direction of a group of platooning vehicles;identifying a set of time-frequency radio resources allocated to the travel direction; andperforming inter-vehicle communications with one or more neighboring vehicles of the group of platooning vehicles using the set of time-frequency radio resources.2. The method of claim 1 , further comprising:frequency-division multiplexing the set of time-frequency radio resources allocated to the travel direction with a second set of time-frequency radio resources allocated to platooning vehicles traveling in a different travel direction.3. The method of claim 1 , further comprising:identifying the travel direction based on identifying a lane in which the group of platooning vehicles are traveling, accessing multiple instances of positioning information associated with the vehicle over a time period, receiving travel direction information from at least one other vehicle in the group of platooning vehicles, based on a positioning or orientation sensor associated with the vehicle, or combinations thereof.4. The method of claim 1 , further comprising:receiving a resource allocation message conveying information identifying the set of time-frequency radio resources allocated to the travel direction.5. The method of claim 1 , further comprising:accessing a pre-configured resource pool to identify the set of time-frequency radio resources allocated to the ...

Vehicle positioning by signaling line-of-sight (LOS) vehicle information

Wireless communication systems and methods related to signaling line-of-sight (LOS) vehicle information for improving vehicle positioning accuracy are provided. A first vehicle receives, via a sensor, sensor data indicating a line-of-sight (LOS) vehicle. The first vehicle receives, via a wireless communication device, one or more ranging signals. The first vehicle determines that a first ranging signal of the one or more ranging signals is transmitted by the LOS vehicle. The first vehicle determines a position of the LOS vehicle based on at least the sensor data and the first ranging signal. Other aspects, embodiments, and features are also claimed and described.

WAVEFORM DESIGN OF DISCOVERY SIGNALS

Methods, systems, and devices for wireless communications are described. In some wireless communications systems, a wireless device may broadcast a discovery preamble to identify a receiving device or to identify a suitable beam for communicating with a receiving device prior to broadcasting a discovery message to the receiving device. In such systems, the wireless device may use the techniques described herein to generate the discovery preamble and to reduce interference between discovery preamble transmissions and avoid data loss. In one example, a wireless device may append a cyclic prefix (CP) to a discovery preamble with a suitable length to protect the discovery preamble from interference from another transmission. In another example, the wireless device may generate a cyclically periodic signal including multiple copies of the discovery preamble so a receiving device may be able to receive a portion of the signal and identify the discovery preamble. 1. A method for wireless communication , comprising:identifying discovery information to broadcast in a discovery message as part of a device discovery procedure;generating a discovery preamble to transmit prior to the discovery message, wherein the discovery preamble indicates an upcoming transmission of the discovery message;applying a first cyclic prefix to the discovery preamble and a second cyclic prefix to the discovery message, wherein the first cyclic prefix is longer than the second cyclic prefix; andtransmitting one or more copies of the generated discovery preamble.2. The method of claim 1 , wherein the first cyclic prefix associated with the discovery preamble comprises an extended cyclic prefix and the second cyclic prefix associated with the discovery message comprises a normal cyclic prefix.3. The method of claim 1 , wherein generating the discovery preamble comprises:generating the discovery preamble using a subcarrier spacing that is less than a subcarrier spacing used for the discovery message.4. ...

Pedestrian positioning via vehicle collaboration

Disclosed are techniques for using ranging signals to determine a position of a pedestrian user equipment (P-UE). In an aspect, a UE receives a plurality of ranging signals transmitted by one or more UEs, measures one or more properties of each of the plurality of ranging signals, and calculates an estimate of the position of the P-UE based on the one or more properties of each of the plurality of ranging signals. In an aspect, the P-UE transmits a plurality of ranging signals, receives a first message and a second message from first and second vehicle UEs (V-UEs), the first and second messages including first and second estimated positions of the P-UE and associated first and second confidences, and calculates an estimate of the position of the P-UE based on the first estimated position, the first confidence, the second estimated position, the second confidence, or a combination thereof.

SYSTEM AND METHOD FOR RANGING-ASSISTED VEHICLE POSITIONING

Aspects of the present disclosure are directed to device-to-device (D2D) and, more particularly, vehicle-to-vehicle (V2V) communication in which an efficient ranging protocol allows efficient ranging-assisted vehicle positioning. A vehicle transmits a first slot ID in a first control period, to indicate a first time slot for transmitting a first ranging signal in a ranging cycle including a plurality of time slots. The vehicle transmits the first ranging signal in the first time slot in the ranging cycle. From a second vehicle, the first vehicle receives a second ranging signal in a second time slot that is different from the first time slot in the ranging cycle. The first vehicle determines a first time-of-arrival (ToA) of the second ranging signal when received by the first vehicle, and transmits the first ToA in a second control period. 1. A first user equipment (UE) , comprising:a transceiver configured for performing ranging using a ranging period comprising a first control period, a ranging cycle comprising a plurality of time slots including a first time slot and a second time slot, and a second control period;a memory; anda processor operatively coupled with the transceiver and the memory,wherein the processor and the memory are configured to:transmit, via the transceiver, a first slot ID in the first control period, to indicate the first time slot for transmitting a first ranging signal in the ranging cycle;transmit, via the transceiver, the first ranging signal in the first time slot in the ranging cycle;receive, from a second user equipment (UE) via the transceiver, a second ranging signal in the second time slot that is different from the first time slot;determine a first time-of-arrival (ToA) of the second ranging signal when received by the first UE; andtransmit, via the transceiver, the first ToA in the second control period after the ranging cycle.2. The first UE of claim 1 , wherein the processor and the memory are further configured totransmit, via ...

DISCOVERY PROCEDURE SIGNALING

Methods, systems, and devices for wireless communications are described. Some wireless communications systems support beamforming to improve the reliability of transmissions from a transmitting device to a receiving device. In some cases, a wireless device broadcasts information using beamforming. In such cases, in order to limit the overhead and power consumption associated with the broadcast, the wireless device utilizes the techniques described herein for broadcasting information using beamforming. In particular, rather than broadcasting large amounts of data in a beam-sweep, a wireless device broadcasts a relatively lightweight signal in a beam-sweep to first identify a receiving device and/or a suitable beam for communicating with a receiving device. Once the transmitting device identifies the receiving device and/or the suitable beam, the transmitting device broadcasts the data to be received by the receiving device. 1. A method for wireless communication , comprising:generating a discovery preamble and a discovery message to broadcast in a device discovery procedure;transmitting the discovery preamble using a transmit beam as part of a beam sweeping procedure, wherein the discovery preamble indicates an upcoming transmission of the discovery message;receiving a signal in response to the discovery preamble or the discovery message; andtransmitting the discovery message based at least in part on the transmitting the discovery preamble.2. The method of claim 1 , wherein a first frequency of discovery preamble transmissions is greater than a second frequency of discovery message transmissions.3. The method of claim 1 , wherein receiving the signal comprises:receiving a query signal in response to the discovery preamble or receiving an acknowledgment signal in response to the discovery message, or receiving the query signal and the acknowledgment signal in response to the discovery message, wherein the discovery message is transmitted based at least in part on ...

Semi-persistent scheduling mechanisms for vehicle-to-vehicle communication

The present disclosure enables the assignment of multiple semi-persistent resource assignments at the same time for use in V2V communications. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE (e.g., a vehicle). The UE may determine at least one resource pattern required for V2V communications. The UE may also send assistance information for the at least one resource pattern to a base station. Further, the UE may receive, from the base station, a response associated with the at least one resource pattern. In an aspect, the response may include an index of approved resource patterns. Further still, the UE may receive, from the base station, an activation grant for a resource assignment for the at least one resource pattern. In an aspect, activation grant may include the index of approved resource patterns being activated.

TECHNIQUES FOR DIRECTIONAL DISCOVERY IN MILLIMETER WAVE COMMUNICATIONS SYSTEM

Techniques are described that support techniques for directional discovery in a millimeter wave communications system. A vehicle-to-everything (V2X) communications system may support beam discovery procedures that use directional beams to discover other entities, establish directional communication links with other entities, or maintaining directional communication links with other entities. The beam discovery procedure may include a sweep pattern where a transmitting entity may probe with directional beams in a plurality of beam directions. During a beam discovery procedure a transmitting entity may transmit discovery signals in a plurality of different directions and a receiving entity may listen for the discovery signals in a plurality of different directions. The sweep patterns of the transmitting entity and the receiving entity may be coordinated to increase a likelihood that the receiving entity will discover the transmitting entity. 1. A method for wireless communication at a user equipment (UE) , comprising:operating as a transmit device during a time period of a beam discovery procedure for a vehicle-to-everything (V2X) communications system, the beam discovery procedure configured to discover at least one UE using the V2X communications system;selecting a sweep pattern based at least in part on operating as the transmit device during the beam discovery procedure, the sweep pattern including a plurality of beam directions; andtransmitting a plurality of discovery signals during the time period of the beam discovery procedure using the V2X communications system based at least in part on the plurality of beam directions of the sweep pattern.2. The method of claim 1 , further comprising:transmitting a first subset of discovery signals during a first sub-interval of the time period of the beam discovery procedure using the V2X communications system, each discovery signal of the first subset of discovery signals being transmitted in a first direction selected ...

Method for predicting charging efficiency of charging pile

The invention relates to a method and device for predicting the charging efficiency of a charging pile, and the method comprises the steps: dividing collected historical charging data of the charging pile into a training set and a test set according to a preset proportion, carrying out the clustering processing, generating N groups of clustered training sets and N groups of clustered test sets, respectively initializing an ADE algorithm according to each group of clustered training sets, optimizing hyper-parameters of the LSTM network through each initialized ADE algorithm to obtain corresponding optimal hyper-parameters to generate N prediction models, and correspondingly inputting the N groups of test sets into the N prediction models for prediction, and the final charging efficiency prediction model is obtained to predict real-time charging data of the charging pile, and a real-time prediction result is obtained. Therefore, the charging efficiency prediction model is generated in a grouping ...

Location and listen-before-schedule based resource allocation for vehicle-to-vehicle communication

Extending vehicle-to-vehicle communications via sensors

An apparatus for wireless communication is provided. The apparatus determines, through sensors of a first vehicle, second-vehicle information associated with a second vehicle. In addition, the apparatus generates at least one safety message to include the determined second-vehicle information of the second vehicle. Further, the apparatus transmits the at least one safety message. The apparatus improves the performance/benefit of V2V communications technology by transmitting BSMs for other vehicles, including non-V2V vehicles without such V2V communications technology. Accordingly V2V vehicles will be able to better assess the traffic situation.

MILLIMETER WAVE DIRECTIONAL DISCOVERY SIGNAL DESIGN

Methods, systems, and devices for wireless communication are described. A transmitting device may select an orthogonal metric based at least in part on at least one of each direction of a plurality of directions to transmit millimeter wave discovery signals or a location parameter associated with the transmitting device. The transmitting device may transmit, in the each direction of the plurality of directions, the millimeter wave discovery signals, where the each transmitted millimeter wave discovery signal has a different orthogonal metric applied that was selected based at least in part on the at least one of the each direction or the location parameter. 1. A method for wireless communication at a receiving device , the method comprising:receiving a discovery signal from a transmitting device, the discovery signal transmitted in a transmit direction using a directional transmission;identifying, based at least in part on a receive direction associated with the discovery signal, the transmit direction;selecting, based at least in part on at least one of the transmit direction or a location parameter associated with the transmitting device, an orthogonal metric to be used to recover the discovery signal; andrecovering the discovery signal using the selected orthogonal metric.2. The method of claim 1 , further comprising:identifying a location parameter associated with the receiving device; andselecting the orthogonal metric based at least in part on the location parameter.3. The method of claim 1 , further comprising:identifying a travel direction associated with the receiving device; andselecting the orthogonal metric based at least in part on the travel direction.4. The method of claim 1 , further comprising:identifying a receiving device type associated with the receiving device; andselecting the orthogonal metric based at least in part on the receiving device type.5. The method of claim 1 , further comprising:identifying a location parameter, a travel direction, ...

RESOURCE ALLOCATION FOR THE COEXISTENCE OF PEER DISCOVERY AND LEGACY LTE TRAFFIC

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus allocates K blocks of subframes for WAN and peer-to-peer communications in a discovery period T and remaining subframes in the discovery period T for WAN communications and allocates a first set of subframes for peer discovery and a second set of subframes for the WAN communications in each block of the K blocks. 1. A method of wireless communication comprising:allocating K blocks of subframes for WAN and peer-to-peer communications in a discovery period T and remaining subframes in the discovery period T for WAN communications; andallocating a first set of subframes for peer discovery and a second set of subframes for the WAN communications in each block of the K blocks.2. The method of claim 1 , further comprising determining a value K based on at least one of power consumed due to powering UEs on and off claim 1 , a proportion of delay sensitive WAN traffic claim 1 , hybrid automatic repeat request (HARQ) transmissions claim 1 , or a density of UEs of an area.3. The method of claim 1 , wherein allocating the subframes for the WAN communications comprises allocating m×L subframes for the WAN communications in each of the K blocks such that each of at least one set of k contiguous subframes for peer discovery is followed by m subframes for the WAN communications.4. The method of claim 3 , wherein the m×L subframes allocated for the WAN communications in each of the K blocks of subframes support at least one of voice services claim 3 , the HARQ transmissions claim 3 , or control information transmissions.5. The method of claim 3 , further comprising:determining an M number of subframes required for peer discovery within the discovery period T;determining a maximum of D number of subframes to be included in each of the K blocks of subframes; andsetting values of K, k, m, and L such that M≦(K×k×L) and D≧(k+m)×L.6. The method of claim 5 , wherein an outage ...

TECHNIQUES FOR REPORTING BUFFER STATUS IN WIRELESS COMMUNICATIONS

Aspects described herein generally relate to communicating buffer status reports (BSR) in wireless communications. A BSR can be generated at a device indicating a size of each of a plurality of messages stored in a buffer of the device for communicating from the device to one or more other devices. The BSR can be transmitted to a base station to request resources for communicating one or more of the plurality of messages to the one or more other devices. 1. A method for communicating buffer status reports (BSR) in wireless communications , comprising:generating, at a device, a BSR indicating a size of each of a plurality of messages stored in a buffer of the device for communicating from the device to one or more other devices; andtransmitting the BSR to a base station to request resources for communicating one or more of the plurality of messages to the one or more other devices.2. The method of claim 1 , wherein the BSR includes an indication of a number of the plurality of messages stored in the buffer of the device.3. The method of claim 1 , wherein the BSR includes a message type for each of the plurality of messages stored in the buffer of the device.4. The method of claim 3 , wherein the BSR indicates the message type based at least in part on specifying a logical channel group identifier in the BSR.5. The method of claim 4 , further comprising:receiving a mapping of a plurality of logical channel group identifiers to a plurality of message types; andselecting the logical channel group identifier from the plurality of logical channel group identifiers that corresponds to the message type in the mapping for indicating in the BSR.6. The method of claim 5 , wherein receiving the mapping comprises at least one of obtaining the mapping from a stored in a configuration at the device or receiving the mapping from the base station.7. The method of claim 5 , further comprising transmitting the mapping from the device to the base station.8. The method of claim 1 , ...

System and method that facilitates beamforming from a vehicle user equipment

Aspects of the disclosure relate to beamforming from a vehicle user equipment (UE). In a first aspect, a beamform vector is selected based on beamform data received from a scheduling entity. Here, the beamform data corresponds to a path between a vehicle UE and a base station or another vehicle, and the beamform vector includes respective phases and amplitudes corresponding to each of a plurality of antennas of the vehicle UE. A beam is then generated in accordance with the beamform vector. In another aspect, a database of beamform data is maintained, and beamform data from the database is retrieved. Here, the retrieved beamform data corresponds to a particular location pair that includes a first location associated with a location of a vehicle UE, and a second location associated with a location of a base station or another vehicle. The beamform data is then transmitted to the vehicle UE.

Foreign matter cleaning device for power transformation and distribution equipment

According to the foreign matter cleaning device for the power transformation and distribution equipment, an insulating rod structure is adopted, and meanwhile, a remote-control collecting and cutting mechanism is arranged, so that collecting and cutting operation can be achieved at the same time. By implementing the embodiment of the invention, the device has the characteristics of simple structure, safety, reliability, high universality and convenience in operation.

NR RACH MSG3 and MSG4 resource configuration for CV2X

Various aspects described herein relate to techniques for resource configuration for random access in a wireless communication system (e.g., a cellular vehicle-to-everything (CV2X) communication system). In an aspect, the method includes identifying a set of one or more random access channel (RACH) resources and configuration, sending a first RACH message including the set, and receiving a second RACH message including a resource selected from the set.

APPARATUS AND METHOD FOR SCHEDULING DELAYED ACKS/NACKS IN LTE CELLULAR SYSTEMS

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be an eNB. The eNB informs UE(s) of a change in at least one of a first configuration for transmission of ACKs/NACKs by the UE(s) for DL transmissions received by the UE(s) or a second configuration for reception of ACKs/NACKs by the UE(s) for UL transmissions sent by the UE(s). The eNB indicates to the UE(s) one or more resources in which the UE(s) is to transmit the ACKs/NACKs for the received DL transmissions or is to receive the ACKs/NACKs for sent UL transmissions. The eNB indicates to the UE(s) a subset of the DL transmissions to the UE(s) for which the UE(s) is to transmit the ACKs/NACKs or a subset of the UL transmissions by the UE(s) for which the UE(s) is to receive the ACKs/NACKs.

Discovery procedure signaling

Methods, systems, and devices for wireless communications are described. Some wireless communications systems support beamforming to improve the reliability of transmissions from a transmitting device to a receiving device. In some cases, a wireless device broadcasts information using beamforming. In such cases, in order to limit the overhead and power consumption associated with the broadcast, the wireless device utilizes the techniques described herein for broadcasting information using beamforming. In particular, rather than broadcasting large amounts of data in a beam-sweep, a wireless device broadcasts a relatively lightweight signal in a beam-sweep to first identify a receiving device and/or a suitable beam for communicating with a receiving device. Once the transmitting device identifies the receiving device and/or the suitable beam, the transmitting device broadcasts the data to be received by the receiving device.

Methods to mitigate inter-platoon interference

Enhanced physical layer performance by inter-service information

In an example, a method for wireless communications by a first wireless device, is disclosed comprising obtaining information regarding an environment for wireless communications between the first wireless device and at least one second wireless device and adjusting one or more operating parameters for the wireless communications, based on the information. As described herein, information from one service or application in a first RAT is used by the first wireless device to enhance performance in another service or application in a second RAT by the first wireless device.

LTE-D2D DISCOVERY IN THE UNLICENSED BAND

Described herein are methods, systems, and apparatus for performing device-to-device (D2D) discovery in an unlicensed band. In one example, a method for wireless communication is described that includes identifying a resource pool for D2D discovery in an unlicensed radio frequency spectrum band and selecting a set of resource blocks in the identified resource pool. The method may also include performing a channel occupancy check for the channel in the selected set of resource blocks. The method further includes transmitting a D2D discovery message based at least in part on the channel occupancy check, the D2D discovery message transmitted over the selected set of resource blocks in the unlicensed radio frequency spectrum band. 1. A method for wireless communication , comprising:identifying a resource pool for device-to-device (D2D) discovery in an unlicensed radio frequency spectrum band;selecting a set of resource blocks in the identified resource pool;performing a channel occupancy check for a channel in the selected set of resource blocks; andtransmitting a D2D discovery message based at least in part on the channel occupancy check, the D2D discovery message transmitted over the selected set of resource blocks in the unlicensed radio frequency spectrum band.2. The method of claim 1 , further comprising:identifying a transmission bandwidth requirement for the channel; andselecting the set of resource blocks in the resource pool based at least in part on the identified transmission bandwidth requirement.3. The method of claim 1 , wherein performing the channel occupancy check comprises:performing a listen-before-talk procedure for the channel in the selected set of resource blocks.4. The method of claim 1 , wherein performing the channel occupancy check comprises:listening to the channel for a first time period to determine whether the channel is idle; andwaiting for a second time period after the first time period to transmit the D2D discovery message upon ...

LOCATION AND LISTEN-BEFORE-SCHEDULE BASED RESOURCE ALLOCATION FOR VEHICLE-TO-VEHICLE COMMUNICATION

Methods, apparatus, and computer-readable mediums for wireless communication are provided. One apparatus is configured to receive at least one SA from at least one UE. The apparatus is further configured to determine an energy associated with each at least one SA. The apparatus is also configured to rank data transmission time-frequency resources based on the determined energy associated with said each received at least one SA. Each at least one SA are associated with a different subset of the data transmission time-frequency resources. The apparatus is further configured to select a set of data transmission time-frequency resources based on the ranked data transmission time-frequency resources and to send a data transmission on the selected set of data transmission time-frequency resources. Another apparatus is configured to partitioning time-frequency resources into different resource groups, to divide UEs into UE groups based on location, and map the UE groups to the resource groups. 1. A method of wireless communication , comprising:partitioning time-frequency resources into different resource groups, the resource groups partitioned in the time domain;dividing vehicle UEs into vehicle UE groups based on vehicle UE location; andmapping the vehicle UE groups to the resource groups.2. The method of claim 1 , wherein the mapping of the vehicle UE groups is determined statically.3. The method of claim 1 , wherein the mapping of the vehicle UE groups is configured dynamically by a network.4. The method of claim 1 , wherein proximal vehicle UEs are selected for a same group.5. The method of claim 1 , wherein proximal vehicle UEs select resources for a same resource group using listen-before-schedule (LBS).6. An apparatus for wireless communication claim 1 , comprising:means for partitioning time-frequency resources into different resource groups, the resource groups partitioned in the time domain;means for dividing vehicle UEs into vehicle UE groups based on vehicle UE ...

EXTENDING VEHICLE-TO-VEHICLE COMMUNICATIONS VIA SENSORS

An apparatus for wireless communication is provided. The apparatus determines, through sensors of a first vehicle, second-vehicle information associated with a second vehicle. In addition, the apparatus generates at least one safety message to include the determined second-vehicle information of the second vehicle. Further, the apparatus transmits the at least one safety message. The apparatus improves the performance/benefit of V2V communications technology by transmitting BSMs for other vehicles, including non-V2V vehicles without such V2V communications technology. Accordingly V2V vehicles will be able to better assess the traffic situation. 1. A method of wireless communication of a first vehicle , comprising:determining, through sensors of the first vehicle, second-vehicle information associated with a second vehicle and third-vehicle information associated with a third vehicle;generating at least one safety message to include at least the determined second-vehicle information of the second vehicle;determining whether to include the third-vehicle information in the at least one safety message; andtransmitting the at least one safety message.2. The method of claim 1 , wherein the second-vehicle information comprises at least one of a position claim 1 , a velocity claim 1 , an acceleration claim 1 , a heading claim 1 , a brake status claim 1 , a vehicle size claim 1 , a path history claim 1 , a path prediction claim 1 , or exterior light states of the second vehicle.3. The method of claim 1 , further comprising determining first-vehicle information associated with the first vehicle including at least one of a position claim 1 , a velocity claim 1 , an acceleration claim 1 , a heading claim 1 , a brake status claim 1 , a vehicle size claim 1 , at least one vehicle event flag claim 1 , a path history claim 1 , a path prediction claim 1 , a steering-wheel angle claim 1 , a timestamp claim 1 , a positional accuracy claim 1 , a transmission state claim 1 , an ...

NR discovery resource pool configuration for CV2X

Methods, apparatuses, and computer-readable mediums for wireless communication are disclosed by the present disclosure. In an example, a host device may determine a pool of preconfigured resources for discovery. The preconfigured resources are designated for one or more of: a discovery preamble, a query signal, a discovery message, and a random access preamble. The host device may transmit the discovery preamble on one or more resources designated for the discovery preamble. A client device may receive the discovery preamble and determine that the client device is interested in receiving information regarding the host device. The client device may transmit a query signal if interested. The host device may determine whether the query signal is received on a resource designated for the query signal in response to the discovery preamble. The host device may transmit a discovery message in response to receiving the query signal.

SYNCHRONIZATION FOR DEVICE-TO-DEVICE POSITIONING IN WIRELESS NETWORKS

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a UE. The apparatus may transmit a message in a first subset of a set of resources. The message may include a position of the apparatus and a resource ID indicating at least one symbol in a second subset of the set of resources for transmitting a sequence. The apparatus may transmit the sequence in the at least one symbol in the second subset of the set of resources identified by the resource ID, receive at least one other sequence, adjust a transmission timing based on the received at least one other sequence, and transmit, based on the adjusted transmission timing, the sequence in one or more symbols in a third subset of the set of resources.

Techniques for compensating for doppler effects in communications

Techniques are described for wireless communication at a wireless device. One method includes transmitting, during a TTI, a first message using a first MCS; and transmitting, during the TTI, a second message using a second MCS. The first message includes indications of a location, a heading, and a speed of the wireless device, and the second MCS is higher than the first MCS. Another method includes decoding a first message received during a TTI; performing a Doppler effect compensation for a second message based at least in part on the first message; and decoding the second message based at least in part on the Doppler effect compensation. The second message is also received during the TTI. The first message is decoded in accordance with a first MCS, and the second message is decoded in accordance with a second MCS, with the second MCS being higher than the first MCS.

PROTOCOL FOR DEVICE-TO-DEVICE POSITIONING

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus determines a position of the apparatus. The apparatus broadcasts information in a first subset of a set of resources. The information includes the position of the apparatus, a sequence ID, and a resource ID associated with a second subset of the set of resources. The apparatus broadcasts a sequence in at least one symbol of the second subset of the set of resources. The at least one symbol is identified by the resource ID and the sequence is identified by the sequence ID.

TECHNIQUES FOR MANAGING A RESOURCE POOL IN WIRELESS COMMUNICATIONS

Aspects described herein generally relate to managing resource pools in wireless communications to optimize the use of those resources for reducing latency in transmissions. The described aspects include receiving, at a user equipment (UE), an alternative resource pool information signal from a network entity; selecting, at the UE, a first control resource from a first frequency portion of the control resource pool based on the alternative resource pool information signal; transmitting, at the UE, the first control resource from the first frequency portion of the control resource pool; selecting, at the UE, a second control resource from a second frequency portion of the control resource pool based on the first control resource; and transmitting, at the UE, the second control resource from the second frequency portion of the control resource pool. 1. A method for managing a control resource pool in wireless communications , comprising:receiving, at a user equipment (UE), an alternative resource pool information signal from a network entity, wherein the alternative resource pool information signal corresponds to a configuration of a resource pool having the control resource pool and a data resource pool used for transmissions during wireless communications;selecting, at the UE, a first control resource from a first frequency portion of the control resource pool based on the alternative resource pool information signal;transmitting, at the UE, the first control resource from the first frequency portion of the control resource pool;selecting, at the UE, a second control resource from a second frequency portion of the control resource pool based on the first control resource; andtransmitting, at the UE, the second control resource from the second frequency portion of the control resource pool.2. The method of claim 1 , further comprising transmitting one or more data resources from the data resource pool after the transmission of the second control resource.3. The ...

LTE-D COMMUNICATIONS FOR V2X APPLICATION

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus is configured to transmit a first SA information in a first subframe. The apparatus is further configured to transmit a first data in the first subframe. The apparatus is configured to transmit a second SA information in a second subframe. The apparatus is also configured to transmit a second data in the second subframe. The first SA information includes information on the first data and the second data. The second SA information includes information on the second data. 1. A method of wireless communication , comprising:transmitting a first scheduling assignment (SA) information in a first subframe;transmitting a first data in the first subframe;transmitting a second SA information in a second subframe; andtransmitting a second data in the second subframe,wherein the first SA information includes information on the first data and the second data, andwherein the second SA information includes information on the second data.2. The method of claim 1 , further comprising:transmitting a third SA information in a third subframe;transmitting a third data in the third subframe;transmitting a fourth SA information in a fourth subframe; andtransmitting a fourth data in the fourth subframe,wherein the first SA information further includes information on the third data and the fourth data,wherein the second SA information further includes information on the third data and the fourth data,wherein the third SA information includes information on the third data and the fourth data, andwherein the fourth SA information includes information on the fourth data.3. The method of claim 1 , wherein the first SA information includes at least one of a first time that the first data is transmitted claim 1 , a first frequency that the first data is transmitted on claim 1 , a location of the first data claim 1 , a modulation of the first data claim 1 , a coding scheme of the ...

Autonomous resource selection for vehicle-to-vehicle communications

Various aspects related to selecting a resource selection procedure for V2V communications are described. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus for selecting a resource selection procedure for V2V transmissions, is described. The apparatus, e.g., a UE, may be configured to identify that recent sensing history information at the UE is unavailable for a sensing based resource selection procedure. The UE may be further configured to select, in response to identifying that the recent sensing history information is unavailable, a resource selection procedure based on configuration information obtained from a network entity. In various configurations, the UE may select a resource for a V2V transmission based on the resource selection procedure selected based on the configuration information.

CARRIER-PHASE POSITIONING IN CELLULAR NETWORKS

A method for position determination based on carrier-phase measurements is disclosed. The method comprises receiving one or more downlink signals transmitted from a base station (BS) during a downlink period, wherein the downlink signals are modulated using a downlink carrier wave, measuring, during the downlink period, a first carrier phase associated with the downlink carrier wave, estimating, during an uplink period subsequent to the downlink period, an integer ambiguity (IA) change, and measuring, during a later downlink period subsequent to the uplink period, a second carrier phase based on the resolved first carrier phase and the estimated IA change.

Vehicle ranging and positioning

Methods, systems, and devices for ranging are described. A multi-phase distributed ranging technique includes transmitting and receiving vehicle information messages during a first time interval, where the vehicle information messages include at least a vehicle identifier and resource information. The multi-phase technique further includes transmitting and receiving ranging signals during a second time interval, and determining times of arrival of received ranging signals. A centralized ranging technique includes receiving resource assignments from an access point, transmitting ranging signals according to the resource assignments, and determining times of arrival of received ranging signals.

Protocol for device-to-device positioning

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus determines a position of the apparatus. The apparatus broadcasts information in a first subset of a set of resources. The information includes the position of the apparatus, a sequence ID, and a resource ID associated with a second subset of the set of resources. The apparatus broadcasts a sequence in at least one symbol of the second subset of the set of resources. The at least one symbol is identified by the resource ID and the sequence is identified by the sequence ID.

Up-down chamfering cutter

The invention discloses a vertical chamfering cutter which comprises a cutter body and a cutter handle which are of an integrated structure. A plurality of groups of cutting edges are arranged at the cutter body and are used for cutting chamfers on a workpiece, and at least two groups of cutting edges are arranged close to each other, so that close upper and lower chamfers can be cut on the workpiece; by means of the first cutting edge and the second cutting edge which are arranged close to each other, concave upper and lower chamfers can be cut on a workpiece at a time so as to improve the cutting precision of the upper and lower chamfers, meanwhile, a single chamfer can be cut through the independently-arranged third cutting edge, and the chamfering cutter can meet the requirement for cutting more chamfers; the guide groove and the chip guide groove which are integrated are formed, a cutting face can be cooled more quickly through cooling liquid, deformation of the cutting face of a workpiece ...

Resource allocation for the coexistence of peer discovery and legacy LTE traffic

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus allocates K blocks of subframes for WAN and peer-to-peer communications in a discovery period T and remaining subframes in the discovery period T for WAN communications and allocates a first set of subframes for peer discovery and a second set of subframes for the WAN communications in each block of the K blocks.

D2D RELAYS AS AN UNDERLAY IN LTE UPLINK

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus obtains at least one of a pathloss measurement to a base station or a maximum tolerable interference to the base station, determines a maximum transmission power for an access link to a user equipment (UE) based on the at least one of the pathloss measurement or the maximum tolerable interference to the base station, and communicates on the access link to the UE at a transmission power less than the determined maximum transmission power. 1. A method of wireless communication , comprising:obtaining at least one of a pathloss measurement to a base station or a maximum tolerable interference to the base station;determining a maximum transmission power for an access link to a user equipment (UE) based on the at least one of the pathloss measurement or the maximum tolerable interference to the base station; andcommunicating on the access link to the UE at a transmission power less than the determined maximum transmission power.2. The method of claim 1 , wherein the determining the maximum transmission power for the access link comprises:determining a uplink transmission power to the base station based on the pathloss measurement; anddetermining the maximum transmission power for the access link by applying a backoff to the determined uplink transmission power.3. The method of claim 1 , wherein the maximum transmission power for the access link comprises a sum of the maximum tolerable interference to the base station and the pathloss measurement.4. The method of claim 2 , wherein the applying the backoff comprises subtracting at least 20 dB from the determined uplink transmission power.5. The method of claim 2 , further comprising reducing the transmission power for the access link to match a rate on a backhaul link.6. The method of claim 1 , wherein the communicating on the access link to the UE is performed using an uplink spectrum.7. The method of claim 1 , ...

SCHEDULING ASSIGNMENT TRANSMISSIONS IN DEVICE-TO-DEVICE COMMUNICATIONS

Techniques for scheduling assignment (SA) transmissions in device-to-device (D2D) communications are described. A D2D user equipment (UE) may use a block of time resources for SA transmissions. A D2D UE may transmit an SA transmission relatively quickly after determining that D2D data is to be transmitted to another D2D UE, relative to having to wait for specified time resources to send an SA transmission. The D2D data may then be transmitted following the SA transmission, reducing latency for transmission of the D2D data. It may be desirable for vehicle-to-vehicle (V2V) transmissions to have a relatively low latency to provide data from one vehicle to another with sufficient time for a vehicle to take action while moving at relatively high rates of speed. 1. A method for wireless communication , comprising:identifying a block of time resources for device-to-device (D2D) data transmissions and scheduling assignment (SA) transmissions;identifying a predefined relationship between the block of time resources and the SA transmissions in the absence of periodic SA transmissions;selecting, from the entire block of time resources, a subset of the time resources for transmitting an SA; andtransmitting the SA transmissions using the subset of the time resources and according to the predefined relationship.2. The method of claim 1 , further comprising:identifying a set of frequency resources for the D2D data transmissions and the SA transmissions, andselecting a subset of the frequency resources for transmitting the SA, wherein the subset of the frequency resources are located within defined segments of the set of frequency resources.3. The method of claim 2 , wherein the subset of frequency resources comprises a first subset of frequency resources for transmitting a first SA transmission and a second subset of frequency resources for transmitting a second SA transmission.4. The method of claim 3 , further comprising:transmitting the first SA transmission using the first ...

Scheduling assignment optimization for device-to-device communications

In one aspect of this disclosure, control information and data are carried in the same subframe in order to reduce control overhead. A method, an apparatus, and a computer-readable medium for wireless communication are provided. The apparatus may be a first UE. The first UE determines a data block to be transmitted to a second UE. The first UE determines a first resource in a subframe for carrying the data block and determines a second resource in the subframe for carrying control information associated with transmitting the data block. The first UE transmits the data block and the control information to the second UE in a device-to-device communication channel on the determined first and second resources, respectively.

SEMI-PERSISTENT SCHEDULING MECHANISMS FOR VEHICLE-TO-VEHICLE COMMUNICATION

The present disclosure enables the assignment of multiple semi-persistent resource assignments at the same time for use in V2V communications. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE (e.g., a vehicle). The UE may determine at least one resource pattern required for V2V communications. The UE may also send assistance information for the at least one resource pattern to a base station. Further, the UE may receive, from the base station, a response associated with the at least one resource pattern. In an aspect, the response may include an index of approved resource patterns. Further still, the UE may receive, from the base station, an activation grant for a resource assignment for the at least one resource pattern. In an aspect, activation grant may include the index of approved resource patterns being activated. 1. A method of wireless communication of a user equipment (UE) , the method comprising:determining at least one resource pattern required for vehicle-to-vehicle (V2V) communications;sending assistance information associated with the at least one resource pattern to a base station;receiving, from the base station, a response associated with the at least one resource pattern, the response comprising an index of approved resource patterns; andreceiving, from the base station, an activation grant for a resource assignment for the at least one resource pattern, the activation grant comprising the index of approved resource patterns.2. The method of claim 1 , wherein the assistance information is included in a semi-persistent schedule (SPS) request.3. The method of claim 1 , wherein the assistance information includes information associated with one or more of a target range for the V2V communications claim 1 , a power of the V2V communications claim 1 , a periodicity of the at least one resource pattern required for the V2V communications claim 1 , a latency in the V2V ...

POWER EFFICIENT RELAY DISCOVERY PROTOCOL

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives discovery resource information from a base station, sends a discovery signal based on the discovery resource information, and receives from at least one user equipment (UE) a request for relaying with the base station based on the discovery signal. The apparatus may also receive a discovery signal from a relay, and send to the relay a request for relaying with a base station based on the discovery signal. The apparatus may further receive a discovery signal from each of a plurality of relays, determine to select one of the plurality of relays based on the discovery signal from each relay, and send to a selected relay a request for relaying with a base station based on the discovery signal when one of the plurality of relays is determined to be selected. 1. A method of wireless communication , comprising:receiving discovery resource information from a base station;sending a discovery signal based on the discovery resource information; andreceiving from at least one user equipment (UE) a request for relaying with the base station based on the discovery signal.2. The method of claim 1 , further comprising:determining at least one of a downlink signal-to-interference-plus-noise ratio (SINR), an uplink interference, or an uplink pathloss, wherein the discovery signal comprises the determined at least one of the downlink SINR, the uplink interference, or the uplink pathloss.3. The method of claim 1 , further comprising broadcasting the discovery signal to the at least one user equipment (UE).4. The method of claim 1 , wherein the discovery signal is sent periodically.5. A method of wireless communication claim 1 , comprising:receiving at a user equipment (UE) a discovery signal from a relay; andsending to the relay a request for relaying with a base station based on the discovery signal.6. The method of claim 5 , wherein the discovery signal comprises at ...

Enabling multi-cluster transmissions

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine to use multi-cluster communications in a vehicle based communication network. The UE may identify a configuration parameter associated with the multi-cluster communications. The UE may select a cluster resource from a set of available cluster resources based on the configuration parameter. The cluster resource may include one or more clusters used for multi-cluster transmissions in the vehicle based communication network. The UE may transmit an indication of the selected cluster resource to a wireless node of the vehicle based communication network, for example, to another UE. The UE may transmit the multi-cluster transmission on the selected cluster resource.

TIMING SYNCHRONIZATION FOR DEVICE-TO-DEVICE DISCOVERY FOR ASYNCHRONOUS LTE DEPLOYMENTS

Methods and devices are described for forwarding, managing, and/or detecting timing information for device-to-device discovery. Timing information may be received from a base station. A timing signal including the timing information may be transmitted. The timing signal may be transmitted during a sub-frame reserved for device-to-device discovery. Timing information for a base station may be transmitted to a user equipment (UE). Instructions to transmit a timing signal including the timing information during a sub-frame reserved for device-to-device discovery are also transmitted to the UE. Information indicating a timing of sub-frames reserved for device-to-device discovery by a neighboring base station may be received from a serving base station. A timing signal may be detected during at least one of the sub-frames reserved for device-to-device discovery. The timing signal may include timing information for the neighboring base station. 1. A method for wireless communications , comprising:receiving, from a base station, timing information for the base station; andtransmitting a timing signal comprising the timing information, the timing signal being transmitted during at least one sub-frame reserved for device-to-device discovery.2. The method of claim 1 , further comprising:transmitting the timing signal using one or more symbols during a portion of a sub-frame.3. The method of claim 1 , wherein a sub-frame during which the timing signal is transmitted is positioned first among the at least one sub-frame reserved for device-to-device discovery.4. The method of claim 1 , further comprising:receiving, from the base station, instructions to transmit the timing signal; andtransmitting the timing signal after the instructions are received.5. The method of claim 1 , further comprising:transmitting the timing signal using one or more symbols at a first frequency during a first portion of a sub-frame, wherein an additional timing signal is transmitted using one or more ...

DEMODULATION REFERENCE SIGNAL DESIGN FOR VEHICLE-TO-VEHICLE COMMUNICATION

Various features described herein relate to DM-RS design for a control channel and a data channel that maybe used for vehicular communications. In an aspect, a UE may determine a base DM-RS sequence associated with a control channel for V2V communication. The UE may further determine a DM-RS sequence based on the base DM-RS sequence and an identity of the UE, and transmit a plurality of DM-RS symbols within the control channel in a subframe using the DM-RS sequence. In another aspect, a UE may generate a plurality of DM-RS sequences, each DM-RS sequence maybe generated for a corresponding DM-RS symbol of a plurality of DM-RS symbols associated with a data channel for V2V communication based on a DM-RS symbol number of the corresponding DM-RS symbol. The UE may transmit the plurality of DM-RS symbols within the data channel in a subframe using the plurality of DM-RS sequences. 1. A method of wireless communication of a user equipment (UE) , comprising:determining a base demodulation reference signal (DM-RS) sequence associated with a control channel for vehicle-to-vehicle communication;determining a DM-RS sequence based on the base DM-RS sequence and an identity of the UE; andtransmitting a plurality of DM-RS symbols within the control channel in a subframe using the DM-RS sequence.2. The method of claim 1 , wherein the control channel is a physical sidelink control channel (PSCCH).3. The method of claim 1 , wherein the base DM-RS sequence is determined based on an index corresponding to the base DM-RS sequence received from a base station.4. The method of claim 1 , wherein the base DM-RS sequence is determined based on a pre-configured index corresponding to the base DM-RS sequence.5. The method of claim 1 , wherein the identity of the UE is a Temporary Mobile Subscriber Identity (TMSI).6. The method of claim 1 , wherein the plurality of DM-RS symbols include four DM-RS symbols and each DM-RS symbol uses the DM-RS sequence.7. The method of claim 6 , further ...

AUTONOMOUS RESOURCE SELECTION FOR VEHICLE-TO-VEHICLE COMMUNICATIONS

Various aspects related to selecting a resource selection procedure for V2V communications are described. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus for selecting a resource selection procedure for V2V transmissions, is described. The apparatus, e.g., a UE, may be configured to identify that recent sensing history information at the UE is unavailable for a sensing based resource selection procedure. The UE may be further configured to select, in response to identifying that the recent sensing history information is unavailable, a resource selection procedure based on configuration information obtained from a network entity. In various configurations, the UE may select a resource for a V2V transmission based on the resource selection procedure selected based on the configuration information. 1. A method of vehicle-to-vehicle (V2V) communications by a user equipment (UE) , comprising:identifying that recent sensing history information at the UE is unavailable for a sensing based resource selection procedure; andselecting, in response to identifying that the recent sensing history information is unavailable, a resource selection procedure based on configuration information obtained from a network entity in communication with the UE.2. The method of claim 1 , wherein the resource selection procedure comprises a random resource selection procedure claim 1 , the sensing based resource selection procedure claim 1 , or a combination thereof.3. The method of claim 2 , wherein selecting the resource selection procedure based on the configuration information comprises selecting the random resource selection procedure claim 2 , wherein the random resource selection procedure comprises:generating a pseudorandom number;identifying a resource for the V2V communications based on the generated pseudorandom number, wherein the pseudorandom number is generated using a randomization function, and wherein a seed for the randomization function ...

LISTEN BEFORE TALK SEQUENCE DESIGN FOR WIRELESS COMMUNICATION

An apparatus for wireless communication of a UE determines to transmit data in a set of RBs to at least one other UE in at least one subframe. The at least one subframe includes a first subset of symbols configured for use for transmission collision avoidance signaling and a second subset of symbols configured for transmitting the data. The apparatus determines a subset of symbols of the first set of symbols within the set of RBs of the at least one subframe for transmitting at least one concatenated sequence. The apparatus transmits the at least one concatenated sequence in each symbol of the determined subset of symbols within the set of RBs of the at least one subframe to indicate that the data will be transmitted in the second set of symbols within the set of RBs of the at least one subframe. 1. A method of wireless communication of a user equipment (UE) , comprising:receiving a transmission in a subset of symbols from at least one UE, each transmission including at least one concatenated sequence in each symbol of the subset of symbols for transmission collision avoidance signaling;determining a set of resource blocks (RBs) on which each transmission is received from the at least one UE; andreceiving data on each determined set of RBs associated with each UE of the at least one UE, the transmission and the data being received on at least one subframe.2. The method of claim 1 , further comprising determining claim 1 , for each received transmission from a transmitting UE of the at least one UE claim 1 , that the data is to be received from the transmitting UE on the determined set of RBs.3. The method of claim 1 , wherein a first subframe of the at least one subframe includes a first slot and a second slot claim 1 , and the subset of symbols includes m−i+1 consecutive symbols i claim 1 , i+1 claim 1 , . . . claim 1 , m of the first slot claim 1 , where 0≤i≤m and 2≤m≤6.4. The method of claim 1 , wherein each symbol of the subset of symbols is associated with at ...

SYSTEM AND METHOD THAT FACILITATES BEAMFORMING FROM A VEHICLE USER EQUIPMENT

Aspects of the disclosure relate to beamforming from a vehicle user equipment (UE). In a first aspect, a beamform vector is selected based on beamform data received from a scheduling entity. Here, the beamform data corresponds to a path between a vehicle UE and a base station or another vehicle, and the beamform vector includes respective phases and amplitudes corresponding to each of a plurality of antennas of the vehicle UE. A beam is then generated in accordance with the beamform vector. In another aspect, a database of beamform data is maintained, and beamform data from the database is retrieved. Here, the retrieved beamform data corresponds to a particular location pair that includes a first location associated with a location of a vehicle UE, and a second location associated with a location of a base station or another vehicle. The beamform data is then transmitted to the vehicle UE. 1. A method of wireless communication comprising:receiving beamform data via a network from a scheduling entity, the beamform data corresponding to a mapping of a path between a vehicle user equipment (UE) and a base station or another vehicle;selecting a beamform vector based on the beamform data received from the scheduling entity, the beamform vector including a respective phase and amplitude corresponding to each of a plurality of antennas coupled to the vehicle UE; andgenerating a beam in accordance with the beamform vector, the beam having a direction consistent with the path between the vehicle UE and the base station or another vehicle.2. The method of claim 1 , wherein the beamform data further includes data corresponding to at least one mapping of an alternative path claim 1 , and wherein the selecting comprises selecting between a plurality of mappings respectively corresponding to a plurality of different paths between the vehicle UE and the base station or another vehicle.3. The method of claim 2 , wherein the selecting between the plurality of mappings is based on a ...

WIRELESS RESOURCE ALLOCATION FOR A VEHICLE ACTING AS A BASE STATION

Aspects of the disclosure relate to a vehicle, or a device or system connected to the vehicle, that enables the vehicle to act as a base station in a wireless communication network. The vehicle includes an access interface transceiver configured to communicate with devices within its passenger cabin, and a backhaul interface transceiver configured to communicate with the wireless communication network. By acting as a base station, the vehicle can establish and provide connectivity between the devices in its passenger cabin and the wireless communication network via the access transceiver and backhaul transceiver. 1. A method for wireless communication in a wireless communication network , the method comprising:communicating with a set of one or more wireless communication devices within a passenger cabin of a vehicle via an access transceiver coupled to the vehicle;communicating with the wireless communication network outside the passenger cabin of the vehicle via a backhaul transceiver coupled to the vehicle; andestablishing connectivity between the set of one or more wireless communication devices and the wireless communication network via the access transceiver and the backhaul transceiver.2. The method of claim 1 , further comprising:determining a position of the vehicle, a speed of the vehicle, and a trajectory of the vehicle;determining a planned route of the vehicle;transmitting vehicle information about the position, the speed, the trajectory, and the planned route of the vehicle to the wireless communication network via the backhaul transceiver; andreceiving an allocation of wireless resources based in part on the position, the speed, the trajectory, and the planned route of the vehicle.3. The method of claim 1 , further comprising:determining a position of a neighbor vehicle, a speed of the neighbor vehicle, and a trajectory of the neighbor vehicle;transmitting neighbor vehicle information about the position, the speed, and the trajectory of the neighbor ...

METHODS AND APPARATUS FOR EFFICIENT SENSOR DATA SHARING IN A VEHICLE-TO-VEHICLE (V2V) NETWORK

Various aspects of the present disclosure relate to vehicle-to-vehicle (V2V) data sharing. The sensor data collected from each vehicle may be divided into common information and detailed information. The common information is broadcasted to every other nearby vehicle. Based on the received common information other vehicles may express interest in some particular detailed information. Unicast and/or multicast sessions may be set up to share the detailed information with the interested vehicles. 1. A method for vehicle-to-vehicle communication , comprising:receiving sensor data from one or more sensors;categorizing the sensor data into common information and detailed information;broadcasting the common information to at least one vehicle in a vehicle-to-vehicle (V2V) network, the common information indicating the availability of the detailed information;determining that at least one portion of the detailed information is desired by the at least one vehicle; andtransmitting the at least one portion of the detailed information to the at least one vehicle.2. The method of claim 1 , wherein the detailed information comprises at least one of heading data claim 1 , speed data claim 1 , geolocation data claim 1 , gyroscopic data claim 1 , accelerometer data claim 1 , proximity data of obstacles claim 1 , image data claim 1 , or video data.3. The method of claim 1 , wherein the broadcasting comprises:indicating desired detailed information generated by one or more sensors of the at least one vehicle in the V2V network.4. The method of claim 1 , further comprising:receiving, from the at least one vehicle in the V2V network desiring the detailed information, a message indicating which portions of the detailed information are desired.5. The method of claim 4 , further comprising:determining a number of vehicles requesting detailed data;determining if a unicast or multicast message is sent, based on the number of vehicles requesting the detailed data;sending a unicast message if ...

LOCATION BASED SENSOR SHARING

Aspects of the present disclosure relate to wireless communications and, more particularly, to techniques for sharing sensor information. The techniques may be practiced, for example, in a vehicle to vehicle (V2V) environment, where frequency resources are mapped based on vehicle location(s). 1. A method for wireless communications , comprising:determining, based on a given location, a set of frequency resources to be used for transmitting sensor information obtained at one or more vehicles for that given location; andutilizing the set of frequency resources to transmit sensor information or monitor for sensor information.2. The method of claim 1 , wherein determining the set of frequency resources is based on a mapping of an area claim 1 , including the given location claim 1 , to frequency resources.3. The method of claim 2 , wherein different mappings are used for different types of sensor information.4. The method of claim 1 , wherein the sensor information is to be transmitted using the set of frequency resources in a subset of time slots.5. The method of claim 1 , further comprising:deciding whether or not to transmit sensor information about a set of one or more locations on the set of frequency resources associated with those locations based on one or more metrics.6. The method of claim 5 , wherein the one or more metrics comprise a location of one or more of the one or more vehicles capable of transmitting the sensor information.7. The method of claim 6 , wherein the one or more metrics are derived based on basic safety messages (BSMs) transmitted by the one or more vehicles.8. The method of claim 7 , wherein the one or more vehicles transmit their sensor capability along with BSMs.9. The method of claim 5 , wherein at least one vehicle closest to the given set of one or more locations is to transmit sensor information on the set of frequency resources associated with the set of one or more locations.10. The method of claim 5 , wherein at least two vehicles ...

Techniques for compensating for doppler effects in communications

Techniques are described for wireless communication at a wireless device. One method includes transmitting, during a TTI, a first message using a first MCS; and transmitting, during the TTI, a second message using a second MCS. The first message includes indications of a location, a heading, and a speed of the wireless device, and the second MCS is higher than the first MCS. Another method includes decoding a first message received during a TTI; performing a Doppler effect compensation for a second message based at least in part on the first message; and decoding the second message based at least in part on the Doppler effect compensation. The second message is also received during the TTI. The first message is decoded in accordance with a first MCS, and the second message is decoded in accordance with a second MCS, with the second MCS being higher than the first MCS.

Synchronized radio transmission for vehicle platooning

Wireless communications systems and methods related to transmission of platoon information. A first vehicle in a vehicle platoon obtains a first radio resource spanning a frequency channel and a time period for synchronous transmission with at least a second vehicle in the vehicle platoon. The first vehicle transmits, synchronously with at least the second vehicle, information associated with the vehicle platoon in the frequency channel and the time period of the first radio resource. The first vehicle may obtain the first radio resource by requesting a transmission request from a wireless communication device and receiving a transmission grant indicating the first radio resource. Alternatively, the first vehicle may obtain the first radio resource by selecting the first radio resource based on at least one of a sensing report or a resource reservation received from the second vehicle.

SUPPORTING HIGH SPEEDS IN VEHICLE-TO-VEHICLE COMMUNICATION

During device-to-device communication between two devices, a communication transmitted from a first UE to a second UE may not be reliably received by the second UE if the first UE is traveling at high speed. Therefore, a travel speed of a transmitting UE may be considered in determining a transmission configuration. According to an aspect, the UE may determine a travel speed of the UE. The UE may determine, based on the travel speed of the UE, a transmission configuration of the UE for device-to-device communication. The UE may transmit the device-to-device communication based on the transmission configuration. 1. A method of wireless communication performed by a user equipment (UE) , the method comprising:determining to enable group hopping for a plurality of demodulation reference signal (DM-RS) sequences associated with a control channel for device-to-device communication, the plurality of DM-RS sequences being carried on a plurality of DM-RS symbols within the control channel of a subframe;determining the plurality of DM-RS sequences by applying a group hopping pattern to the plurality of DM-RS symbols; andtransmitting or receiving scheduling assignment for the device-to-device communication with the plurality of DM-RS sequences.2. The method of claim 1 , wherein the determining to enable group hopping is based on one or more of a travel speed of the UE claim 1 , a pre-configuration claim 1 , or an evolved Node B (eNB) signaling.3. The method of claim 1 , wherein different DM-RS sequences are carried on different DM-RS symbols.4. The method of claim 1 , wherein the plurality of DM-RS sequences are based on Zadoff-Chu sequences.5. The method of claim 4 , wherein the applying of the group hopping pattern to the plurality of DM-RS symbols comprises changing root indices of the Zadoff-Chu sequences used for different DM-RS symbols.6. The method of claim 5 , wherein a root index of a Zadoff-Chu sequence used for a DM-RS symbol of the plurality of DM-RS symbols is ...

LISTEN BEFORE TALK SEQUENCE DESIGN FOR WIRELESS COMMUNICATION

An apparatus for wireless communication of a UE determines to transmit data in a set of RBs to at least one other UE in at least one subframe. The at least one subframe includes a first subset of symbols configured for use for transmission collision avoidance signaling and a second subset of symbols configured for transmitting the data. The apparatus determines a subset of symbols of the first set of symbols within the set of RBs of the at least one subframe for transmitting at least one concatenated sequence. The apparatus transmits the at least one concatenated sequence in each symbol of the determined subset of symbols within the set of RBs of the at least one subframe to indicate that the data will be transmitted in the second set of symbols within the set of RBs of the at least one subframe. 1. A method of wireless communication of a user equipment (UE) , comprising:determining to transmit data in a set of resource blocks (RBs) to at least one other UE in at least one subframe, the at least one subframe including a first subset of symbols configured for use for transmission collision avoidance signaling and a second subset of symbols configured for transmitting the data;determining a subset of symbols of the first subset of symbols within the set of RBs of the at least one subframe for transmitting at least one concatenated sequence; andtransmitting the at least one concatenated sequence in each symbol of the determined subset of symbols within the set of RBs of the at least one subframe to indicate that the data will be transmitted in the second subset of symbols within the set of RBs of the at least one subframe.2. The method of claim 1 , wherein a first subframe of the at least one subframe includes a first slot and a second slot claim 1 , and the determined subset of symbols includes m−i+1 consecutive symbols i claim 1 , i+1 claim 1 , . . . claim 1 , m of the first slot claim 1 , where 0≤i≤m and 2≤m≤6.3. The method of claim 1 , wherein each symbol of the ...

TECHNIQUES FOR CONNECTION SETUP OF MMWAVE-BASED V2X COMMUNICATION SYSTEMS

Various aspects described herein relate to techniques for connection setup procedures in a wireless communication system (e.g., a vehicle-to-everything (V2X) communication system in millimeter wave). In an aspect, the method includes identifying information for V2X communications, and initiating a random access procedure based on the identified information. The method further includes identifying one or more random access channel (RACH) resources based on the information, identifying one or more RACH response resources based on the one or more RACH resources, and performing directional communications using at least the one or more RACH resources or the one or more RACH response resources. 1. A method of wireless communications , comprising:identifying information for vehicle-to-everything (V2X) communications;initiating a random access procedure based on the identified information;identifying one or more random access channel (RACH) resources based on the information;identifying one or more RACH response resources based on the one or more RACH resources; andperforming directional communications using at least the one or more RACH resources or the one or more RACH response resources.2. The method of claim 1 , wherein the identifying information comprises identifying one or more discovery resources.3. The method of claim 2 , wherein the identifying the one or more RACH resources comprises mapping the one or more discovery resources to the one or more RACH resources.4. The method of claim 2 ,wherein the number of the one or more discovery resources is at least two and is more than the number of the one or more RACH resources, andwherein the number of the one or more RACH resources is equal to or more than the number of the one or more RACH response resources.5. The method of claim 1 , wherein the identifying the one or more RACH response resources comprises mapping each of the one or more RACH resources to one of the one or more RACH response resources.6. The method of ...

VEHICLE POSITIONING BY SIGNALING LINE-OF-SIGHT (LOS) VEHICLE INFORMATION

Wireless communication systems and methods related to signaling line-of-sight (LOS) vehicle information for improving vehicle positioning accuracy are provided. A first vehicle receives, via a sensor, sensor data indicating a line-of-sight (LOS) vehicle. The first vehicle receives, via a wireless communication device, one or more ranging signals. The first vehicle determines that a first ranging signal of the one or more ranging signals is transmitted by the LOS vehicle. The first vehicle determines a position of the LOS vehicle based on at least the sensor data and the first ranging signal. Other aspects, embodiments, and features are also claimed and described. 1. A method of wireless communication , comprising:receiving, by a sensor of a first vehicle, sensor data indicating a line-of-sight (LOS) vehicle;receiving, by a wireless communication device of the first vehicle, one or more ranging signals;determining, by the first vehicle, that a first ranging signal of the one or more ranging signals is transmitted by the LOS vehicle; anddetermining, by the first vehicle, a position of the LOS vehicle based on at least the sensor data and the first ranging signal.2. The method of claim 1 , further comprising determining the position of the LOS vehicle by:determining a relative position of the LOS vehicle with respect to the first vehicle based on the sensor data; anddetermining the position of the LOS vehicle based on global positioning system (GPS) coordinate data of the first vehicle and the relative position.3. The method of claim 2 , further comprising:determining the position of the LOS vehicle by determining a relative distance between the first vehicle and the LOS vehicle based on the first ranging signal; andupdating the position of the LOS vehicle based on the relative distance.4. The method of claim 1 , further comprising:receiving, by the first vehicle from a second vehicle, a message indicating a position of the second vehicle and an identifier (ID) of the ...

APPARATUS AND METHOD FOR SCHEDULING DELAYED ACKS/NACKS IN LTE CELLULAR SYSTEMS

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be an eNB. The eNB informs UE(s) of a change in at least one of a first configuration for transmission of ACKs/NACKs by the UE(s) for DL transmissions received by the UE(s) or a second configuration for reception of ACKs/NACKs by the UE(s) for UL transmissions sent by the UE(s). The eNB indicates to the UE(s) one or more resources in which the UE(s) is to transmit the ACKs/NACKs for the received DL transmissions or is to receive the ACKs/NACKs for sent UL transmissions. The eNB indicates to the UE(s) a subset of the DL transmissions to the UE(s) for which the UE(s) is to transmit the ACKs/NACKs or a subset of the UL transmissions by the UE(s) for which the UE(s) is to receive the ACKs/NACKs. 1. A method of wireless communication of an eNB comprising:informing at least one user equipment (UE) of a change in at least one of a first configuration for transmission of acknowledgments (ACKs)/negative acknowledgements (NACKs) by the at least one UE for downlink (DL) transmissions received by the at least one UE or a second configuration for reception of ACKs/NACKs by the at least one UE for uplink (UL) transmissions sent by the at least one UE; andindicating to the at least one UE one or more resources in which the at least one UE is to transmit the ACKs/NACKs for the received DL transmissions or is to receive the ACKs/NACKs for sent UL transmissions.2. The method of claim 1 , further comprising sending a delay period to the at least one UE for delaying transmission of ACKs/NACKs.3. The method of claim 2 , wherein the delay period is specific to each ACK/NACK.4. The method of claim 2 , further comprising:sending to the at least one UE a first transmission in a first subframe;sending to the at least one UE a second transmission in a second subframe subsequent to the first subframe; andreceiving concurrently from the at least one UE a first ACK/NACK to the first ...

ENABLING MULTI-CLUSTER TRANSMISSIONS

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine to use multi-cluster communications in a vehicle based communication network. The UE may identify a configuration parameter associated with the multi-cluster communications. The UE may select a cluster resource from a set of available cluster resources based on the configuration parameter. The cluster resource may include one or more clusters used for multi-cluster transmissions in the vehicle based communication network. The UE may transmit an indication of the selected cluster resource to a wireless node of the vehicle based communication network, for example, to another UE. The UE may transmit the multi-cluster transmission on the selected cluster resource. 1. A method for wireless communication at a user equipment (UE) , comprising:identifying a transmission power requirement associated with a vehicle based communication network when the UE is in communications with a cellular communications network;determining to use multi-cluster communications in the vehicle based communication network, wherein the determining is based at least in part on the identified transmission power requirement; andtransmitting a multi-cluster transmission based at least in part on the determining.2. The method of claim 1 , wherein the transmission power requirement is based at least in part on a parameter obtained from a base station.3. The method of claim 1 , further comprising:identifying the transmission power requirement based at least in part on a location parameter of the UE when there is a failure to communicate with the cellular communications network.4. The method of claim 1 , further comprising:receiving a message from a base station that conveys an indication of a configuration parameter associated with the multi-cluster communications, wherein transmitting the multi-cluster transmission is based at least in part on the configuration parameter.5. The method of claim 4 ...

LTE BASED V2X COMMUNICATION QOS AND CONGESTION MITIGATION

Methods and apparatus for configuring a UE to assist in mitigating network congestion include determining whether a data packet has expired based on a first parameter, which indicates an expiration of the data, and adjusting a transmission of the data packet based on the determination of whether the data packet has expired. In some aspects, the UE may drop the data packet upon determination that the data packet has expired. The UE may be configured detect to a first congestion level, receive a second congestion level from a second UE, and process a frame for transmission based on the first or second congestion level. The UE may be configured determine a priority, generate a data packet that includes a destination parameter or a source parameter, adjust radio resource parameters based on the destination parameter or source parameter, and transmit data packets according to adjusted radio resources. 1. A method of wireless communication of a user equipment (UE) , comprising:determining at least one priority parameter associated with a data packet, the at least one priority parameter including a first parameter that indicates an expiration of the data packet;determining whether the data packet has expired based on the first parameter; andadjusting a transmission of the data packet based on the determination of whether the data packet has expired.2. The method of claim 1 , further comprising dropping the data packet upon determining that the data packet has expired claim 1 , wherein dropping the data packet corresponds to refraining from transmitting the data packet.3. The method of claim 1 , wherein the adjusting the transmission of the data packet is based on a second parameter that indicates a transmission classification.4. The method of claim 3 , further comprising transmitting the data packet claim 3 , upon determining that the data packet is not expired and based on the second parameter.5. The method of claim 3 , wherein the second parameter includes one of a drop ...

Power efficient relay discovery protocol

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives discovery resource information from a base station, sends a discovery signal based on the discovery resource information, and receives from at least one user equipment (UE) a request for relaying with the base station based on the discovery signal. The apparatus may also receive a discovery signal from a relay, and send to the relay a request for relaying with a base station based on the discovery signal. The apparatus may further receive a discovery signal from each of a plurality of relays, determine to select one of the plurality of relays based on the discovery signal from each relay, and send to a selected relay a request for relaying with a base station based on the discovery signal when one of the plurality of relays is determined to be selected.

SYSTEM AND METHOD FOR RANGING-ASSISTED VEHICLE POSITIONING

Aspects of the present disclosure are directed to device-to-device (D2D) and, more particularly, vehicle-to-vehicle (V2V) communication in which an efficient ranging protocol allows efficient ranging-assisted vehicle positioning. A vehicle transmits a first slot ID in a first control period, to indicate a first time slot for transmitting a first ranging signal in a ranging cycle including a plurality of time slots. The vehicle transmits the first ranging signal in the first time slot in the ranging cycle. From a second vehicle, the first vehicle receives a second ranging signal in a second time slot that is different from the first time slot in the ranging cycle. The first vehicle determines a first time-of-arrival (ToA) of the second ranging signal when received by the first vehicle, and transmits the first ToA in a second control period. 1. A first user equipment (UE) , comprising:a transceiver configured for performing ranging using a ranging period comprising a first control period, a ranging cycle, and a second control period;a memory; anda processor operatively coupled with the transceiver and the memory,wherein the processor and the memory are configured to:transmit, via the transceiver, a first slot ID in the first control period, to indicate a first time slot for transmitting a first ranging signal in the ranging cycle after the first control period, the ranging cycle comprising a plurality of time slots including the first time slot and a second time slot;transmit, via the transceiver, the first ranging signal in the first time slot in the ranging cycle;receive, from a second user equipment (UE) via the transceiver, a second ranging signal in the second time slot that is different from the first time slot;determine a first time-of-arrival (ToA) of the second ranging signal when received by the first UE; andtransmit, via the transceiver, the first ToA in the second control period after the ranging cycle.2. The first UE of claim 1 , wherein the processor and ...

METHOD AND APPARATUS FOR DETERMINING VEHICLE LOCATION IN VEHICLE-TO-VEHICLE COMMUNICATIONS

A method for developing and reporting enhanced user equipment (UE) location information includes obtaining a global positioning system (GPS) location for a user equipment (UE), determining a location of at least one radio frequency (RF) antenna relative to the GPS location, developing a reference frame based at least in part on the location of the at least one RF antenna, determining a location of a structural element of the UE, and transmitting the GPS location, the location of the at least one RF antenna, and the location of the structural element of the UE. 1. A method for developing and reporting enhanced user equipment (UE) location information , comprising:obtaining a global positioning system (GPS) location for a user equipment (UE);determining a location of at least one radio frequency (RF) antenna relative to the GPS location;developing a reference frame based at least in part on the location of the at least one RF antenna;determining a location of a structural element of the UE; andtransmitting the GPS location, the location of the at least one RF antenna, and the location of the structural element of the UE.2. The method of claim 1 , wherein the UE is a vehicle.3. The method of claim 1 , further comprising a plurality of RF antennas claim 1 , each of the plurality of RF antennas having a location determined with respect to the GPS antenna claim 1 , the plurality of RF antennas used to define the reference frame claim 1 , the reference frame defining a volume of a vehicle.4. The method of claim 1 , wherein the GPS location claim 1 , the location of the at least one RF antenna claim 1 , and the location of the structural element of the UE comprise enhanced vehicle location information.5. The method of claim 1 , further comprising combining the GPS location claim 1 , the location of the at least one RF antenna claim 1 , and the location of the structural element of the UE into a communication message.6. The method of claim 1 , further comprising mapping the ...

SYSTEM AND METHOD FOR RANGING-ASSISTED POSITIONING OF VEHICLES IN VEHICLE-TO-VEHICLE COMMUNICATIONS

A method for ranging includes randomly selecting a symbol in each of at least two successive sub-cycles of a ranging cycle, transmitting symbol IDs corresponding to the randomly selected symbols and a sequence ID, and transmitting a ranging signal with the sequence ID on each of the randomly selected symbols. 1. A method for ranging , comprising:randomly selecting a symbol in each of at least two successive sub-cycles of a ranging cycle, the randomly selected symbol in each of the at least two successive sub-cycles of the ranging cycle occurring in different respective symbol positions in each of the at least two successive sub-cycles of the ranging signal;transmitting symbol identifications (IDs) corresponding to the randomly selected symbols and a sequence ID; andtransmitting a ranging signal with the sequence ID only on each of the randomly selected symbols to determine a range to an object.2. The method of claim 1 , further comprising using a pseudo-random process to randomly select the symbol in each of at least two successive sub-cycles.3. The method of claim 1 , further comprising computing a distance using received ranging signals.4. The method of claim 1 , further comprising canceling a clock offset when receiving ranging signals.5. The method of claim 1 , further comprising transmitting time of arrival (ToA) and system delay information corresponding to a received ranging signal.6. (canceled)7. The method of claim 1 , further comprising transmitting the ranging signal using a physical sidelink ranging channel (PSRCH).8. An apparatus for ranging claim 1 , comprising:a randomly selected symbol in each of at least two successive sub-cycles of a ranging cycle, the randomly selected symbol in each of the at least two successive sub-cycles of the ranging cycle occurring in different respective symbol positions in each of the at least two successive sub-cycles of the ranging signal;a transmitter configured to transmit symbol identifications (IDs) corresponding to ...

ENHANCED PHYSICAL LAYER PERFORMANCE BY INTER-SERVICE INFORMATION

In an example, a method for wireless communications by a first wireless device, is disclosed comprising obtaining information regarding an environment for wireless communications between the first wireless device and at least one second wireless device and adjusting one or more operating parameters for the wireless communications, based on the information. As described herein, information from one service or application in a first RAT is used by the first wireless device to enhance performance in another service or application in a second RAT by the first wireless device. 1. A method for wireless communications by a first wireless device , comprising:obtaining information regarding an environment for wireless communications between the first wireless device and at least one second wireless device; andadjusting one or more operating parameters for the wireless communications, based on the information.2. The method of claim 1 , wherein the information is obtained via an inter-service exchange of information between different layers of the first wireless device.3. The method of claim 1 , wherein the adjusting is also based on a capability of at least one of the first wireless device and the second wireless device.4. The method of claim 1 , wherein the information comprises at least one of: speed and location of the first wireless device claim 1 , speed and location of the second wireless device claim 1 , or relative speed between the first and second wireless devices.5. The method of claim 1 , wherein the one or more operating parameters comprises a modulation and coding scheme (MCS).6. The method of claim 5 , wherein:the information comprises a target data rate, target link budget, and speed; andthe adjusting comprises selecting a combination of MCS, a reference signal (RS) pattern, and a multiple input multiple output (MIMO) mode, based on the target data rate, target link budget, and speed.7. The method of claim 5 , wherein the adjusting comprises adjusting an ...

PEDESTRIAN POSITIONING VIA VEHICLE COLLABORATION

Disclosed are techniques for using ranging signals to determine a position of a pedestrian user equipment (P-UE). In an aspect, a UE receives a plurality of ranging signals transmitted by one or more UEs, measures one or more properties of each of the plurality of ranging signals, and calculates an estimate of the position of the P-UE based on the one or more properties of each of the plurality of ranging signals. In an aspect, the P-UE transmits a plurality of ranging signals, receives a first message and a second message from first and second vehicle UEs (V-UEs), the first and second messages including first and second estimated positions of the P-UE and associated first and second confidences, and calculates an estimate of the position of the P-UE based on the first estimated position, the first confidence, the second estimated position, the second confidence, or a combination thereof. 1. A first user equipment (UE) , comprising:a memory;at least one transceiver; and receive, via the at least one transceiver, one or more ranging signals transmitted by a second UE;', 'perform one or more positioning measurements of each of the one or more ranging signals; and', 'calculate an estimate of a position of the second UE based on the one or more positioning measurements of each of the one or more ranging signals., 'at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to2. The first UE of claim 1 , wherein the one or more positioning measurements of each of the one or more ranging signals comprise a time of arrival (ToA) of each of the one or more ranging signals claim 1 , an angle-of-arrival (AoA) of each of the one or more ranging signals claim 1 , or any combination thereof.3. The first UE of claim 2 , wherein the ToA of each of the one or more ranging signals is based on a local clock time of the first UE.4. The first UE of claim 1 , wherein the at least one processor is further configured ...

RANGING BETWEEN A USER EQUIPMENT AND A FIXED REFERENCE NODE

In an embodiment, a user equipment (UE) receives, from a fixed reference node, at least one round-trip propagation time (RTT) ranging scheduling message indicating a set of downlink (DL) ranging resource assignments and a set of uplink (UL) ranging resource grants, receives one or more DL ranging signals from the fixed reference node on a first set of resources identified by the set of DL ranging resource assignments, and transmits one or more UL ranging signals to the fixed reference node on a second set of resources identified by the set of UL ranging resource grants. 1. A method , at a user equipment (UE) , of determining round trip time (RTT) , comprising:receiving, from a fixed reference node, a set of downlink (DL) ranging resource assignments;receiving, from the fixed reference node, a set of uplink (UL) ranging resource grants;receiving one or more DL ranging signals from the fixed reference node on a first set of resources identified by the set of DL ranging resource assignments;measuring one or more DL times of arrival (ToAs) of the one or more DL ranging signals at the UE, wherein one or more DL startpoints of the one or more DL ranging signals correspond to beginnings of one or more DL symbols among the first set of resources; andtransmitting one or more UL ranging signals to the fixed reference node on a second set of resources identified by the set of UL ranging resource grants.2. The method of claim 1 , further comprising receiving an indication that the set of DL ranging resource assignments and the set of UL ranging resource grants are scheduled in accordance with a semi-persistent scheduling (SPS) protocol.3. The method of claim 1 , further comprising:transmitting, to the fixed reference node, at least one ranging scheduling request,wherein the set of downlink (DL) ranging resource assignments and the set of uplink (UL) ranging resource grants are received in response to the at least one ranging scheduling request as part of a UE-initiated RTT ...

TECHNIQUES FOR CONNECTION SETUP OF MMWAVE-BASED V2X COMMUNICATION SYSTEMS

Various aspects described herein relate to techniques for connection setup procedures in a wireless communication system (e.g., a vehicle-to-everything (VX) communication system in millimeter wave). In an aspect, the method includes identifying information for VX communications, and initiating a random access procedure based on the identified information. The method further includes identifying one or more random access channel (RACH) resources based on the information, identifying one or more RACH response resources based on the one or more RACH resources, and performing directional communications using at least the one or more RACH resources or the one or more RACH response resources. 1. A method of wireless communications , comprising:identifying a resource available for random access for at least vehicle-to-vehicle (V2V) communications;identifying a response resource based on the resource; andperforming directional V2V communications using at least the resource, the response resource, or both.2. The method of claim 1 , further comprising:identifying the resource, at least in part, by identifying a discovery resource.3. The method of claim 2 , wherein the identifying the resource comprises mapping the discovery resource to the resource.4. The method of claim 2 , wherein if the discovery resource comprises a plurality of discovery resources claim 2 , the resource comprises a plurality of resources claim 2 , and the response resource comprises a plurality of response resources then:the plurality of discovery resources out numbers the plurality of resources, andthe plurality of resources out numbers or equals the plurality of response resources.5. The method of claim 1 , wherein the identifying the response resources comprises mapping the resource to the response resource.6. The method of claim 1 , further comprising:identifying a location of the resource based on V2V communication information.7. The method of claim 6 , and further comprising:identifying the V2V ...

TECHNIQUES FOR INTERFERENCE MANAGEMENT IN MILLIMETER WAVE COMMUNICATIONS SYSTEMS

Described are methods for interference detection and management in a millimeter wave communications system. A V2X communications system may support interference management procedures that comprise scheduling a system wide training interval in a transmission timeslot, suspending traffic transmissions on a link in the communications system during the training interval to perform training on the link, and resuming traffic transmissions on the link if interference is not detected during the training interval. Interference management procedures may also include receiving at a node, unique parameters transmitted from another node in a communication system during a discovery stage, determining whether interference will occur at the node based on the received unique parameters, and suspending transmissions to and from the node if it is determined interference will occur at the node. 1. A method of wireless communication , comprising:determining interference at a first node in a wireless communications system; andcoordinating transmission between the first node and at least a second node in the communication system based on the determined interference.2. The method of claim 1 , further comprising:determining interference during a system-wide training interval, wherein the training interval is scheduled in a transmission timeslot previously allotted to traffic transmissions; andresuming traffic transmissions if interference is not detected during the training interval.3. The method of claim 2 , further comprising performing training based on a pseudo-random sequence.4. The method of claim 2 , further comprising pre-configuring the system-wide training interval.5. The method of claim 2 , further comprising receiving the system-wide training interval from an eNB of a serving cell in the communication system.6. The method of claim 1 , further comprising:receiving at the first node, unique parameters transmitted from the at least second node in a communication system during a ...

APPARATUS AND METHOD FOR SCHEDULING DELAYED ACKS/NACKS IN LTE CELLULAR SYSTEMS

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be an eNB. The eNB informs UE(s) of a change in at least one of a first configuration for transmission of ACKs/NACKs by the UE(s) for DL transmissions received by the UE(s) or a second configuration for reception of ACKs/NACKs by the UE(s) for UL transmissions sent by the UE(s). The eNB indicates to the UE(s) one or more resources in which the UE(s) is to transmit the ACKs/NACKs for the received DL transmissions or is to receive the ACKs/NACKs for sent UL transmissions. The eNB indicates to the UE(s) a subset of the DL transmissions to the UE(s) for which the UE(s) is to transmit the ACKs/NACKs or a subset of the UL transmissions by the UE(s) for which the UE(s) is to receive the ACKs/NACKs. 1. A method of wireless communication of an evolved Node B (eNB) comprising: a first configuration of one or more subframes to be used for transmission of acknowledgments (ACKs)/negative acknowledgements (NACKs) by the at least one UE for downlink (DL) transmissions received by the at least one UE,', 'a second configuration of one or more subframes to be used for reception of ACKs/NACKs by the at least one UE for uplink (UL) transmissions sent by the at least one UE,', 'wherein the DL-UL transmission configuration is unchanged, and', 'wherein the informing is through a radio resource control (RRC) configuration message; and, 'informing at least one user equipment (UE) of a change in at least one ofindicating to the at least one UE one or more subframes in which the at least one UE is to transmit the ACKs/NACKs for the received DL transmissions or is to receive the ACKs/NACKs for sent UL transmissions,wherein the one or more subframes to be used for transmission of ACKs/NACKs are later than one or more subframes previously schedules for transmission of ACKS/NACKs, or wherein the one or more subframes to be used for reception of ACKs/NACKs are later than one or more ...

DISCOVERY PREAMBLE CONTENT FOR A DEVICE DISCOVERY PROCEDURE

Techniques are described for performing beam sweep procedures as part of a device discovery procedure. A transmitting device (e.g., user equipment (UE) or base station) may generate a discovery preamble that is configured to indicate that a discovery message will be transmitted. The discovery preamble may be a smaller message (e.g., less bits) than the discovery message and thus may use fewer resources when it is being communicated. The transmitting device may transmit a plurality of signals that include a discovery preamble as part of beam sweep procedure. Once the transmitting device identifies a receiving device, the transmitting device may broadcast the discovery message. The discovery preamble may include a variety of different types of information including information relating to an identifier for the transmitting device, a discovery mode of the transmitting device, beam configurations, communication resources, beam sweep indexes, or a combination thereof. 1. A method for wireless communication , comprising:generating a discovery preamble and a discovery message in a device discovery procedure, wherein the discovery preamble includes information indicating that the discovery message will be transmitted;transmitting a plurality of signals that include the discovery preamble as part of a beam sweeping procedure performed during the device discovery procedure; andtransmitting the discovery message based at least in part on transmitting the discovery preamble.2. The method of claim 1 , further comprising:generating a preamble identifier based at least in part on an identifier of a device that transmits the discovery message, wherein the discovery preamble includes the preamble identifier.3. The method of claim 1 , further comprising:identifying a discovery mode of a transmitting device; andgenerating a discovery mode identifier based at least in part on identifying the discovery mode, wherein the discovery preamble includes the discovery mode identifier.4. The ...

SUPPORTING HIGH SPEEDS IN VEHICLE-TO-VEHICLE COMMUNICATION

During device-to-device communication between two devices, a communication transmitted from a first UE to a second UE may not be reliably received by the second UE if the first UE is traveling at high speed. Therefore, a travel speed of a transmitting UE may be considered in determining a transmission configuration. According to an aspect, the UE may determine a travel speed of the UE. The UE may determine, based on the travel speed of the UE, a transmission configuration of the UE for device-to-device communication. The UE may transmit the device-to-device communication based on the transmission configuration.

PEDESTRIAN POSITIONING VIA VEHICLE COLLABORATION

Disclosed are techniques for using ranging signals to determine a position of a pedestrian user equipment (P-UE). In an aspect, a UE receives a plurality of ranging signals transmitted by one or more UEs, measures one or more properties of each of the plurality of ranging signals, and calculates an estimate of the position of the P-UE based on the one or more properties of each of the plurality of ranging signals. In an aspect, the P-UE transmits a plurality of ranging signals, receives a first message and a second message from first and second vehicle UEs (V-UEs), the first and second messages including first and second estimated positions of the P-UE and associated first and second confidences, and calculates an estimate of the position of the P-UE based on the first estimated position, the first confidence, the second estimated position, the second confidence, or a combination thereof. 1. A method for using ranging signals to determine a position of a pedestrian user equipment (P-UE) , comprising:receiving, at a first user equipment (UE), a plurality of ranging signals transmitted by one or more UEs;measuring, by the first UE, one or more properties of each of the plurality of ranging signals; andcalculating, by the first UE, an estimate of the position of the P-UE based on the one or more properties of each of the plurality of ranging signals.2. The method of claim 1 , wherein the one or more properties of each of the plurality of ranging signals comprise a time of arrival (ToA) of each of the plurality of ranging signals claim 1 , an angle-of-arrival (AoA) of each of the plurality of ranging signals claim 1 , or any combination thereof.3. The method of claim 2 , wherein the ToA of each of the plurality of ranging signals is based on a local clock time of the first UE.4. The method of claim 1 , further comprising:transmitting, by the first UE, the estimate of the position of the P-UE to a second UE.5. The method of claim 4 , further comprising:calculating, by ...

Nr rach msg3 and msg4 resource configuration for cv2x

Various aspects described herein relate to techniques for resource configuration for random access in a wireless communication system (e.g., a cellular vehicle-to-everything (CV2X) communication system). In an aspect, the method includes identifying a set of one or more random access channel (RACH) resources and configuration, sending a first RACH message including the set, and receiving a second RACH message including a resource selected from the set.

METHODS TO ENABLE EFFICIENT INTRA-PLATOON COMMUNICATION

Methods, systems, and devices for wireless communication are described. A user equipment (UE), e.g., a lead platooning vehicle configured for wireless communications, may determine a communication resource requirement for a group of platooning vehicles. The communication resource requirement may be based at least in part on a number of vehicles forming the group of platooning vehicles and a communication range of at least a portion of the vehicles. The UE may identify, based at least in part on the identified communication resource requirement, an assignment of time-frequency radio resources to use for inter-vehicle communications in the group of platooning vehicles. The UE may transmit an indication of the assignment of time-frequency radio resources to the group of platooning vehicles. 1. A method for wireless communication , comprising:determining a communication resource requirement for a group of platooning vehicles, the communication resource requirement based at least in part on a number of vehicles forming the group of platooning vehicles and a communication range of at least a portion of the vehicles;identifying, based at least in part on the identified communication resource requirement, an assignment of time-frequency radio resources to use for inter-vehicle communications in the group of platooning vehicles; andtransmitting an indication of the assignment of time-frequency radio resources to the group of platooning vehicles.2. The method of claim 1 , further comprising:determining a communication schedule for the group of platooning vehicles, the communication schedule comprising assigning at least a portion of the time-frequency radio resources to different vehicles; andtransmitting an indication of the communication schedule to the group of platooning vehicles.3. The method of claim 2 , further comprising:obtaining communications, according to the communications schedule and using at least a portion of the assigned time-frequency radio resources, from ...

MODULATION AND CODING SCHEME VALUE SELECTION

Various aspects of the disclosure relate to the selection and use of modulation and coding scheme (MCS) values. For example, a first MCS table may be used for a first condition and a second MCS table used for a second condition. The disclosure relates in some aspects to inter-device signaling that indicates which MCS table is to be used for communication between the devices. 1. An apparatus for communication comprising:a memory; anda processor coupled to the memory, select a set of modulation and coding scheme (MCS) values from a plurality of sets of MCS values;', 'send an indication of the selected set of MCS values to another apparatus; and', 'communicate with the other apparatus, wherein the communication uses the selected set of MCS values., 'the processor and the memory configured to2. The apparatus of claim 1 , wherein the plurality of sets of MCS values comprise a first MCS table and a second MCS table.3. The apparatus of claim 2 , wherein:the first MCS table supports up to a first modulation order; andthe second MCS table supports up to a second modulation order that is different from the first modulation order.4. The apparatus of claim 2 , wherein:the first MCS table supports up to 16 quadrature amplitude modulation (QAM); andthe second MCS table supports up to 64 QAM.5. The apparatus of claim 2 , wherein:modulation order entries of the first MCS table for MCS index values of 18, 19, and 20 have a value of 4; andmodulation order entries of the second MCS table for MCS index values of 18, 19, and 20 have a value of 6.6. The apparatus of claim 1 , wherein the selection of the set of MCS values comprises:determining a modulation order to be used for the communication; andselecting the set of MCS values based on the determined modulation order.7. The apparatus of claim 1 , wherein the selection of the set of MCS values comprises:determining whether 16 quadrature amplitude modulation (QAM) or 64 QAM is to be used for the communication; andselecting the set of ...

LIMITS FOR MODULATION AND CODING SCHEME VALUES

Various aspects of the disclosure relate to limits for modulation and coding scheme (MCS) values. For example, a first set of limits (e.g., minimum and maximum limits) may be used for a first MCS table and a second set of limits may be used for a second MCS table. The disclosure also relates in some aspects to inter-device signaling that indicates which minimum and maximum limits for an MCS table are to be used for communication between the devices. 1. An apparatus for communication comprising:a memory; anda processor coupled to the memory, determine a first minimum value and a first maximum value for a first set of modulation and coding scheme (MCS) values defined for peer-to-peer communication between a first device and a second device;', 'determine a second minimum value and a second maximum value for a second set of MCS values defined for the peer-to-peer communication; and', 'send the first minimum value, the first maximum value, the second minimum value, and the second maximum value to the first device., 'the processor and the memory configured to2. The apparatus of claim 1 , further comprising:determining at least one other minimum value and at least one other maximum value for at least one other set of MCS values defined for the peer-to-peer communication; andsending the at least one other minimum value and the at least one other maximum value to the first device.3. The apparatus of claim 1 , wherein:the first set of MCS values comprises a first MCS table; andthe second set of MCS values comprises a second MCS table.4. The apparatus of claim 3 , wherein:the first MCS table supports up to a first modulation order; andthe second MCS table supports up to a second modulation order that is different from the first modulation order.5. The apparatus of claim 3 , wherein:the first MCS table supports up to 16 quadrature amplitude modulation (QAM); andthe second MCS table supports up to 64 QAM.6. The apparatus of claim 1 , wherein the determination of the first ...

FREQUENCY BIASING FOR DOPPLER SHIFT COMPENSATION IN WIRELESS COMMUNICATIONS SYSTEMS

Various aspects related to frequency biasing to compensate for frequency variations caused by Doppler shift in V2V communication systems are described. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus, e.g., a UE, may be configured to determine a velocity of the apparatus, and determine a frequency biasing adjustment based on the determined velocity of the apparatus. The apparatus may be further configured to communicate with UE based on an adjusted carrier frequency determined based on a carrier frequency and the determined frequency biasing adjustment. In some configurations, a driving environment of the apparatus maybe considered, and the frequency biasing adjustment is determined further based on the determined driving environment. 1. A method of vehicle-to-vehicle (V2V) communication of a user equipment (UE) , comprising:determining a velocity of the UE;determining a frequency biasing adjustment based on the determined velocity of the UE; andcommunicating with a second UE based on an adjusted carrier frequency that is adjusted based on a carrier frequency and the determined frequency biasing adjustment.2. The method of claim 1 , wherein the communicating comprises transmitting based on the adjusted carrier frequency that is adjusted based on the carrier frequency and the determined frequency biasing adjustment.3. The method of claim 1 , wherein the communicating comprising receiving based on the adjusted carrier frequency that is adjusted based on the carrier frequency and the determined frequency biasing adjustment.4. The method of claim 1 , wherein the adjusted carrier frequency is fand the adjusted carrier frequency fis determined based on f+f claim 1 , where fis the carrier frequency and fis the frequency biasing adjustment.5. The method of claim 4 , wherein the frequency biasing adjustment fis determined based at least on a factor equal to v/c claim 4 , where v is the determined velocity and ...

MILLIMETER WAVE DIRECTIONAL DISCOVERY SIGNAL DESIGN

Methods, systems, and devices for wireless communication are described. A transmitting device may select an orthogonal metric based at least in part on at least one of each direction of a plurality of directions to transmit millimeter wave discovery signals or a location parameter associated with the transmitting device. The transmitting device may transmit, in the each direction of the plurality of directions, the millimeter wave discovery signals, where the each transmitted millimeter wave discovery signal has a different orthogonal metric applied that was selected based at least in part on the at least one of the each direction or the location parameter. 1. A method for wireless communication at a transmitting device , comprising:selecting an orthogonal metric based at least in part on at least one of each direction of a plurality of directions to transmit millimeter wave discovery signals or a location parameter associated with the transmitting device; andtransmitting, in the each direction of the plurality of directions, the millimeter wave discovery signals, wherein each transmitted millimeter wave discovery signal has a different orthogonal metric applied that was selected based at least in part on the at least one of the each direction or the location parameter.2. The method of claim 1 , further comprising:identifying a response resource associated with receiving a response to a discovery signal; andselecting the orthogonal metric based at least in part on the response resource.3. The method of claim 1 , further comprising:identifying a travel direction associated with the transmitting device; andselecting the orthogonal metric based at least in part on the travel direction.4. The method of claim 1 , further comprising:identifying a transmitting device type associated with the transmitting device; andselecting the orthogonal metric based at least in part on the transmitting device type.5. The method of claim 1 , further comprising:identifying an identifier ...

Carrier-phase positioning in cellular networks

A method for position determination based on carrier-phase measurements is disclosed. The method comprises receiving one or more downlink signals transmitted from a base station (BS) during a downlink period, wherein the downlink signals are modulated using a downlink carrier wave, measuring, during the downlink period, a first carrier phase associated with the downlink carrier wave, estimating, during an uplink period subsequent to the downlink period, an integer ambiguity (IA) change, and measuring, during a later downlink period subsequent to the uplink period, a second carrier phase based on the resolved first carrier phase and the estimated IA change.

Ranging between a user equipment and a fixed reference node

In an embodiment, a user equipment (UE) receives, from a fixed reference node, at least one round-trip propagation time (RTT) ranging scheduling message indicating a set of downlink (DL) ranging resource assignments and a set of uplink (UL) ranging resource grants, receives one or more DL ranging signals from the fixed reference node on a first set of resources identified by the set of DL ranging resource assignments, and transmits one or more UL ranging signals to the fixed reference node on a second set of resources identified by the set of UL ranging resource grants.

Enabling multi-cluster transmissions

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine to use multi-cluster communications in a vehicle based communication network. The UE may identify a configuration parameter associated with the multi-cluster communications. The UE may select a cluster resource from a set of available cluster resources based on the configuration parameter. The cluster resource may include one or more clusters used for multi-cluster transmissions in the vehicle based communication network. The UE may transmit an indication of the selected cluster resource to a wireless node of the vehicle based communication network, for example, to another UE. The UE may transmit the multi-cluster transmission on the selected cluster resource.

LTE-D communications for V2X application

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus is configured to transmit a first SA information in a first subframe. The apparatus is further configured to transmit a first data in the first subframe. The apparatus is configured to transmit a second SA information in a second subframe. The apparatus is also configured to transmit a second data in the second subframe. The first SA information includes information on the first data and the second data. The second SA information includes information on the second data.

D2d relays as an underlay in lte uplink

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus obtains at least one of a pathloss measurement to a base station or a maximum tolerable interference to the base station, determines a maximum transmission power for an access link to a user equipment (UE) based on the at least one of the pathloss measurement or the maximum tolerable interference to the base station, and communicates on the access link to the UE at a transmission power less than the determined maximum transmission power.

schedule assignment optimization for device to device communications

trata-se, em um aspecto desta revelação, de informações e dados de controle que são portados no mesmo subquadro a fim de reduzir a sobrecarga de controle. um método, um aparelho e um meio legível por computador para comunicação sem fio são fornecidos. o aparelho pode ser um primeiro ue. o primeiro ue determina um bloco de dados a ser transmitido para um segundo ue. o primeiro ue determina um primeiro recurso em um subquadro para portar o bloco de dados e determina um segundo recurso no subquadro para portar as informações de controle associadas à transmissão do bloco de dados. o primeiro ue transmite o bloco de dados e as informações de controle para o segundo ue em um canal de comunicação de dispositivo a dispositivo no primeiro e no segundo recursos determinados, respectivamente. One aspect of this disclosure is information and control data that is carried in the same subframe in order to reduce control overload. A method, apparatus and computer readable medium for wireless communication are provided. The apparatus may be a first eu. the first eu determines a block of data to be transmitted to a second eu. The first eu determines a first resource in a subframe to carry the data block and determines a second resource in the subframe to carry the control information associated with data block transmission. the first eu transmits the data block and control information to the second eu on a device to device communication channel in the first and second determined resources, respectively.

Location-based resource allocation and listening before programming for vehicle-to-vehicle communication

Un procedimiento (900) de comunicación inalámbrica, que comprende: dividir (902) recursos de tiempo-frecuencia en diferentes grupos de recursos, los grupos de recursos divididos en el dominio de tiempo; dividir (904) los UE de vehículo en grupos de UE de vehículo en base a la localización de UE de vehículo; y mapear (906) los grupos de UE de vehículo a los grupos de recursos para la comunicación inalámbrica, en el que los grupos de recursos están constituidos por una u otra de una serie de subtramas impares (708) o subtramas pares (706), y los grupos vecinos se mapean a diferentes subtramas de la serie de subtramas pares o impares.

demodulation reference signal design for vehicle to vehicle communication

diversas características aqui descritas referem-se ao desenho de dm-rs para um canal de controle e um canal de dados que pode ser utilizado para comunicações veiculares. sob um aspecto, um ue pode determinar uma sequência base de dm-rs associada a um canal de controle para comunicação v2v. o ue pode, além disso, determinar uma sequência base de dm-rs baseada na sequência base de dm-rs e uma identidade do ue, e transmitir uma variedade de símbolos dm-rs dentro do canal de controle em um sub-quadro utilizando a sequência de dm-rs. sob outro aspecto, um ue pode gerar uma variedade de sequências de dm-rs, cada sequência de dm-rs pode ser gerada para um símbolo dm-rs correspondente de uma variedade de símbolos dmrs associados com um canal de dados para comunicação v2v com base em um número de símbolo dm-rs do símbolo dm-rs correspondente. o ue pode transmitir a variedade de símbolos dm-rs dentro do canal de dados em um sub-quadro utilizando a variedade de sequências de dm-rs. Several features described herein relate to the design of dm-rs for a control channel and a data channel that can be used for vehicular communications. In one aspect, a eu may determine a base sequence of dm-rs associated with a control channel for v2v communication. the eu can further determine a dm-rs base sequence based on the dm-rs base sequence and an eu identity, and transmit a variety of dm-rs symbols within the control channel in a subframe using the dm-rs sequence. in another aspect, one which may generate a variety of dm-rs sequences, each dm-rs sequence may be generated for a corresponding dm-rs symbol of a variety of dmrs symbols associated with a data channel for v2v based communication. at a symbol number dm-rs of the corresponding dm-rs symbol. which can transmit the variety of dm-rs symbols within the data channel in a subframe using the variety of dm-rs sequences.

Location and listen-before-schedule based resource allocation for vehicle-to-vehicle communication

Methods, apparatus, and computer-readable mediums for wireless communication are provided. One apparatus is configured to receive at least one SA from at least one UE. The apparatus is further configured to determine an energy associated with each at least one SA. The apparatus is also configured to rank data transmission time-frequency resources based on the determined energy associated with said each received at least one SA. Each at least one SA are associated with a different subset of the data transmission time-frequency resources. The apparatus is further configured to select a set of data transmission time-frequency resources based on the ranked data transmission time-frequency resources and to send a data transmission on the selected set of data transmission time-frequency resources. Another apparatus is configured to partitioning time-frequency resources into different resource groups, to divide UEs into UE groups based on location, and map the UE groups to the resource groups.

Discovery procedure signaling

Methods, systems, and devices for wireless communications are described. Some wireless communications systems support beamforming to improve the reliability of transmissions from a transmitting device to a receiving device. In some cases, a wireless device broadcasts information using beamforming. In such cases, in order to limit the overhead and power consumption associated with the broadcast, the wireless device utilizes the techniques described herein for broadcasting information using beamforming. In particular, rather than broadcasting large amounts of data in a beam-sweep, a wireless device broadcasts a relatively lightweight signal in a beam-sweep to first identify a receiving device and/or a suitable beam for communicating with a receiving device. Once the transmitting device identifies the receiving device and/or the suitable beam, the transmitting device broadcasts the data to be received by the receiving device.

Methods and apparatuses to enable efficient intra-platoon communication

Synchronization for device-to-device positioning in wireless networks

Autonomous resource selection for vehicle-to-vehicle communications

Various aspects related to selecting a resource selection procedure for V2V communications are described. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus for selecting a resource selection procedure for V2V transmissions, is described. The apparatus, e.g., a UE, may be configured to identify that recent sensing history information at the UE is unavailable for a sensing based resource selection procedure. The UE may be further configured to select, in response to identifying that the recent sensing history information is unavailable, a resource selection procedure based on configuration information obtained from a network entity. In various configurations, the UE may select a resource for a V2V transmission based on the resource selection procedure selected based on the configuration information.

Design of demodulation reference signal for vehicle-to-vehicle communication

Un procedimiento de comunicación inalámbrica de un equipo de usuario, UE, (104, 350, 402, 404), que comprende: determinar una secuencia de señal de referencia de demodulación , DM-RS, base para un canal de control (400) para la comunicación de vehículo a vehículo basada en un índice correspondiente a la secuencia de DM-RS base recibida desde una estación base (102, 180, 310) o basada en un índice preconfigurado correspondiente a la secuencia de DM-RS base; determinar una secuencia de DM-RS basada en la secuencia de DM-RS base y una identidad del UE; y transmitir una pluralidad de símbolos de DM-RS (410, 412, 414, 416, 510, 512, 514, 516) dentro del canal de control (400) en una subtrama usando la secuencia de DM-RS, caracterizado por que cada símbolo de DM-RS usa la misma secuencia de DM-RS. A wireless communication method of a user equipment, UE, (104, 350, 402, 404), comprising: determining a demodulation reference signal sequence, DM-RS, base for a control channel (400) for vehicle-to-vehicle communication based on an index corresponding to the base DM-RS sequence received from a base station (102, 180, 310) or based on a preconfigured index corresponding to the base DM-RS sequence; determining a DM-RS sequence based on the base DM-RS sequence and an identity of the UE; and transmitting a plurality of DM-RS symbols (410, 412, 414, 416, 510, 512, 514, 516) within the control channel (400) in a subframe using the DM-RS sequence, characterized in that each DM-RS symbol uses the same sequence of DM-RS.

Limits for modulation and coding scheme values

Various aspects of the disclosure relate to limits for modulation and coding scheme (MCS) values. For example, a first set of limits (e.g., minimum and maximum limits) may be used for a first MCS table and a second set of limits may be used for a second MCS table. The disclosure also relates in some aspects to inter-device signaling that indicates which minimum and maximum limits for an MCS table are to be used for communication between the devices.

Nr rach msg1 configuration for cv2x

Lte-d2d discovery in the unlicensed band

Described herein are methods, systems, and apparatus for performing device-to-device (D2D) discovery in an unlicensed band. In one example, a method for wireless communication is described that includes identifying a resource pool for D2D discovery in an unlicensed radio frequency spectrum band and selecting a set of resource blocks in the identified resource pool. The method may also include performing a channel occupancy check for the channel in the selected set of resource blocks. The method further includes transmitting a D2D discovery message based at least in part on the channel occupancy check, the D2D discovery message transmitted over the selected set of resource blocks in the unlicensed radio frequency spectrum band.

Scheduling assignment transmissions in device-to-device communications

Techniques for scheduling assignment (SA) transmissions in device-to-device (D2D) communications are described. A D2D user equipment (UE) may use a block of time resources for SA transmissions. A D2D UE may transmit an SA transmission relatively quickly after determining that D2D data is to be transmitted to another D2D UE, relative to having to wait for specified time resources to send an SA transmission. The D2D data may then be transmitted following the SA transmission, reducing latency for transmission of the D2D data. It may be desirable for vehicle-to-vehicle (V2V) transmissions to have a relatively low latency to provide data from one vehicle to another with sufficient time for a vehicle to take action while moving at relatively high rates of speed.

Timing synchronization for device-to-device discovery for asynchronous lte deployments

Methods and devices are described for forwarding, managing, and/or detecting timing information for device-to-device discovery. Timing information may be received from a base station. A timing signal including the timing information may be transmitted. The timing signal may be transmitted during a sub-frame reserved for device-to-device discovery. Timing information for a base station may be transmitted to a user equipment (UE). Instructions to transmit a timing signal including the timing information during a sub- frame reserved for device-to-device discovery are also transmitted to the UE. Information indicating a timing of sub-frames reserved for device-to-device discovery by a neighboring base station may be received from a serving base station. A timing signal may be detected during at least one of the sub-frames reserved for device-to-device discovery. The timing signal may include timing information for the neighboring base station.

D2D relays as an underlay in LTE uplink

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus obtains at least one of a pathloss measurement to a base station or a maximum tolerable interference to the base station, determines a maximum transmission power for an access link to a user equipment (UE) based on the at least one of the pathloss measurement or the maximum tolerable interference to the base station, and communicates on the access link to the UE at a transmission power less than the determined maximum transmission power.