POWER SUPPLY FOR BOOSTING CHARGE

Provide is a power supply for boosting charge which is adaptive to a change in capacity by modularizing each part, can achieve modularization while facilitating insulation from a grid by installing a transformer at the grid side, can reduce the ripple of the output current by controlling a switching in a phase staggering scheme, and can reduce the ripple of the output current in an individual charging mode. The power supply for boosting charge includes: an input filter unit for filtering current or voltage introduced from a power grid; a rectifying unit for rectifying an AC voltage outputted from the input filter unit into a DC voltage; a DC link unit for smoothing an output voltage of the rectifying unit; and a battery charging unit which includes two or more battery charging modules connected in parallel to the DC link unit. 1. A power supply for boosting charge comprising:an input filter unit configured to filter current or voltage introduced from a power grid;a rectifying unit configured to rectify an alternating current (AC) voltage outputted from the input filter unit into a direct current (DC) voltage;a DC link unit configured to smooth an output voltage of the rectifying unit; anda battery charging unit which includes a battery charging module connected in parallel to the DC link unit.2. The power supply according to claim 1 , further comprising a transformer which is installed at an input terminal of the input filter unit.3. The power supply according to claim 1 , wherein the battery charging module includes a plurality of switching elements connected in parallel with each other claim 1 , and the plurality of switching elements are alternately switched.4. The power supply according to claim 1 , wherein the battery charging unit performs a charging operation in different modes depending on a charged state of a battery unit.5. The power supply according to claim 4 , wherein the battery charging unit performs the charging operation in a precharge mode when the ...

Method and apparatus for transmitting data in device-to-device service system

A method for transmitting data in a second device that performs a Device-to-Device (D2D) service is provided. The method includes determining cooperative communication, if a value indicating a channel condition between a first device and a third device is less than or equal to a predetermined threshold, overhearing data transmitted from the first device to the third device and overhearing a response signal transmitted from the third device to the first device, to identify a transmission-failed data block of the first device, and if there are data transmission resources left at a predetermined scheduled data transmission time, transmitting the transmission-failed data block of the first device to the third device by piggybacking the transmission-failed data block on transmission data of the second device.

METHOD AND APPARATUS FOR PERFORMING SYNCHRONIZATION IN DEVICE-TO-DEVICE NETWORK

A method and an apparatus for performing synchronization by a first device in a Device-to-Device (D2D) network are provided. The method includes detecting a synchronization signal from at least one second device during one period, determining a phase adjustment value depending on a number of synchronization signals, which have been detected from the at least one second device during the one period, adjusting a phase value of a first device using the phase adjustment value, and transmitting a synchronization signal if the phase value of the first device reaches a predetermined specific value. 1. A method for performing synchronization by a first device in a Device-to-Device (D2D) network , the method comprising:detecting a synchronization signal from at least one second device during one period;determining a phase adjustment value depending on a number of synchronization signals, which have been detected from the at least one second device during the one period;adjusting a phase value of a first device using the phase adjustment value; andtransmitting a synchronization signal if the phase value of the first device reaches a predetermined specific value.2. The method of claim 1 , wherein the one period continues from a point of time that the first device transmitted a previous synchronization signal claim 1 , until the first device transmits a current synchronization signal.3. The method of claim 2 , wherein the one period varies depending on a number of synchronization signals claim 2 , which have been detected from the at least one second device beginning from the point of time that the first device transmitted the previous synchronization signal claim 2 , until the first device transmits the current synchronization signal.4. The method of claim 1 , wherein the phase adjustment value includes a coupling factor used to adjust a phase of a Pulse-Coupled Oscillator (PCO) mounted in the first device.5. The method of claim 4 , wherein the coupling factor is determined ...

Method and apparatus for transmitting packet in system performing d2d direct communication

A method and an apparatus for transmitting a packet in a system performing a Device to Device (D2D) direct communication are provided. In the method, whether to transmit a small packet is determined. When small packet transmission is determined, at least one peripheral reception device is informed of whether the small packet is transmitted at a scheduling point.

METHOD AND APPARATUS FOR SYNCHRONIZATION FOR DEVICE-TO-DEVICE COMMUNICATION

A method and an apparatus for synchronization for a device-to-device communication are disclosed. The method includes: instantly adjusting a synchronization phase value according to a time point when a synchronization signal is received, as soon as a device receives the synchronization signal from an adjacent device in an unconnected state; accumulatively storing at least one phase adjustment value according to a time point when at least one synchronization signal is received, whenever the device receives the at least one synchronization signal from at least one adjacent device in a connected state; and adjusting the synchronization phase value according to the stored at least one phase adjustment value when the device transitions from the connected state to the unconnected state. 1. A method of synchronization for a device-to-device communication , the method comprising:in response to receiving, by a device, a synchronization signal from an adjacent device in an unconnected state, adjusting a synchronization phase value according to a time point when the synchronization signal is received;in response to receiving at least one synchronization signal from at least one adjacent device in a connected state, accumulatively storing at least one phase adjustment value according to a time point when at least one synchronization signal is received; andin response to transitioning from the connected state to the unconnected state, adjusting the synchronization phase value according to the stored at least one phase adjustment value.2. The method of claim 1 , wherein the device and the at least one adjacent device comprise oscillators having an identical phase increment ratio claim 1 , respectively.3. The method of claim 1 , further comprising:in response to at least one of: an expiration of a predetermined connection period and a detection of an asynchrony, transiting the device from the connected state to the unconnected state.4. The method of claim 3 , further comprising: ...

METHOD AND DEVICE FOR MANAGING SECURITY KEY FOR COMMUNICATION AUTHENTICATION OF SUBSCRIBER STATION USED IN COOPERATIVE COMMUNICATION OF MULTIPLE BASE STATION IN RADIO COMMUNICATION SYSTEM

A subscriber station performs a method for managing a security key. The method includes generating, for each of the base stations, an input value for generation of the security key for data transmission and reception with the each base station; transmitting, to the each base station, the input value for a corresponding base station; and generating the security key of the corresponding base station by using the input value of the each base station. A base station provides cooperative communication to the subscriber station. 1. A method of managing a security key in a cell configured with base stations that provide cooperative communication to a subscriber station , the method comprising:generating, for each of the base stations, an input value for generation of the security key for data transmission and reception with the each base station;transmitting, to the each base station, the input value for a corresponding base station; andgenerating the security key of the corresponding base station by using the input value of the each base station.2. The method of claim 1 , wherein the input value comprises a seed that is set to a different value for each of the base stations.3. The method of claim 1 , wherein the input value comprises a seed that the base stations commonly use claim 1 , and a seed offset that is set to a different value for each of the base stations.4. The method of claim 1 , further comprising:generating an input value for generation of a security key for data transmission and reception with a new base station, when the new base station is added.5. The method of claim 1 , further comprising:transmitting and receiving, to and from the base stations, data encrypted with a security key of a first base station generated by using an input value of the first base station that manages the remaining base stations among the base stations.6. The method of claim 1 , further comprising:transmitting and receiving, to and from the base stations, data encrypted with a ...

APPARATUS AND METHOD FOR ROUTING DATA IN MOBILE COMMUNICATION SYSTEM

A method for routing data by a Corresponding Mobility Agent (CMA) in a mobile communication system is provided. The method includes managing mobility for a Mobile Station (MS) with a Mobile Access Gateway (MAG), and routing a data packet between a Corresponding Node (CN) and the MS based on a location of the MS, wherein the CMA is mapped to an application server which provides an application service. 1. A method for routing data by a Corresponding Mobility Agent (CMA) in a mobile communication system , the method comprising:managing mobility for a Mobile Station (MS) with a Mobile Access Gateway (MAG); androuting a data packet between a Corresponding Node (CN) and the MS through the MAG based on a location of the MS,wherein the CMA is mapped to an application server which provides an application service.2. The method of claim 1 , wherein the managing of the mobility for the MS with the MAG comprises:acquiring a Home Address (HoA) Internet Protocol (IP) address of the MS, a MAG IP address corresponding to an IP address of the CN, an IP address of a Local Mobility Anchor (LMA) for the MS, and a crypto token from the MAG.3. The method of claim 2 , wherein the managing of the mobility for the MS with the MAG comprises:performing an authentication operation with the LMA.4. The method of claim 1 , wherein the routing of the data packet between the CN and the MS through the MAG based on the location of the MS comprises:upon receiving a data packet which targets the MS from the CN, transmitting the received data packet to the MAG, upon which the MAG transmits the data packet to the MS.5. A method for routing data by a Mobile Access Gateway (MAG) in a mobile communication system claim 1 , the method comprising:managing mobility for a Mobile Station (MS) with a Corresponding Mobility Agent (CMA); androuting a data packet between a Corresponding Node (CN) and the MS through the CMA based on a location of the MS,wherein the CMA is mapped to an application server which provides ...

METHOD AND APPARATUS FOR SUPPORTING MULTIPLE-ACCESS SIGNAL IN MOBILE COMMUNICATION SYSTEM

In order to generate multiple-access signals, each transmitter transmits information by using all or a part of channel resources. The signal of each transmitter is mapped to an OFDM time-frequency resource space as a trellis modulation path. A mobile communication system maps trellis modulation paths of a plurality of transmitters to the same resource space. In order to effectively detect and distinguish signals of a plurality of transmitters transmitted through the same channel resource space, a receiver uses a message passing method between symbols and a path connection method. The receiver uses a state space expansion method, a backward pre-decoding method, and a successive interference cancellation method to more efficiently reconstruct a discovery signal. 1. A method of transmitting a multiple-access signal in a mobile communication system , the method comprising:selecting a transmission resource based on a trellis map; andtransmitting data using the selected transmission resource to a receiver,wherein the trellis map includes information related to a position changing of at least one of tones.2. The method of claim 1 , wherein the transmission resource include a resource slot claim 1 , and data of one or more transmitters are mapped to one resource slot.3. The method of claim 1 , wherein the trellis map includes position information of an initial tone.4. The method of claim 3 , wherein the position information of the initial tone is expressed by using a predetermined bit.5. The method of claim 3 , wherein the trellis map includes at least one of a predetermined trellis map claim 3 , a trellis map extracted using a memory claim 3 , and a trellis map given to the transmitter.6. An apparatus for transmitting a multiple-access signal in a mobile communication system claim 3 , the apparatus comprising:a controller configured to select a transmission resource based on a trellis map; anda transmitter configured to transmit data using the selected transmission ...

METHOD AND APPARATUS FOR PERFORMING INITIAL ENTRY FOR DEVICE-TO-DEVICE COMMUNICATION IN A WIRELESS COMMUNICATION SYSTEM

A method and apparatus for performing initial entry for Device-to-Device (D2D) communication in a wireless communication system include transmitting an initial entry request including a service request for D2D communication to a Mobility Management Entity (MME) by a terminal, and if the service request for D2D communication is accepted, receiving information indicating that the initial entry request is accepted, including D2D communication information from the MME by the terminal. 1. A method for performing initial entry for Device-to-Device (D2D) communication in a wireless communication system , the method comprising:transmitting an initial entry request including a service request for D2D communication to a Mobility Management Entity (MME) by a terminal; andif the service request for D2D communication is accepted, receiving information indicating that the initial entry request is accepted, including D2D communication information from the MME by the terminal.2. The method of claim 1 , further comprising:receiving a default bearer setup request for the D2D communication from a base station that has received information indicating D2D registration completion for the terminal from the MME; andsetting up a default bearer using a security key included in the default bearer setup request and transmitting information indicating completion of the default bearer setup to the MME through the base station.3. The method of claim 2 , wherein the information indicating D2D registration completion is received through a new bearer established between the MME and the base station claim 2 , and the new bearer is a bearer for transmitting and receiving a Non-Access Stratum (NAS) message between the terminal and the MME.4. The method of claim 1 , further comprising:establishing a radio connection by transmitting a radio connection request indicating D2D originating call to the base station, before transmitting the initial entry request.5. The method of claim 4 , wherein the service ...

METHOD OF CONTROLLING REVERSE TRANSMISSION IN A MOBILE COMMUNICATION SYSTEM

An apparatus and method for controlling a reverse data rate in a mobile station. The method including determining a bit of a multi-bit control channel information based on at least two of a current data rate, transmission power, and an amount of data stored in a buffer of the mobile station; and transmitting the multi-bit control channel information to a base station. The bit of the multi-bit control channel information is determined based on whether the mobile station has power available to transmit at a higher reverse data rate. 1determining a bit of a multi-bit control channel information based on at least two of a current data rate, transmission power, and an amount of data stored in a buffer of the mobile station; andtransmitting the multi-bit control channel information to a base station,wherein the bit of the multi-bit control channel information is determined based on whether the mobile station has power available to transmit at a higher reverse data rate.. A method of controlling a data transmission of a mobile station, the method comprising: This application is a Continuation of U.S. application Ser. No. 12/559,901, which was filed in the U.S. Patent and Trademark Office on Sep. 15, 2009, which was a Continuation of U.S. application Ser. No. 10/109,740, which was filed in the U.S. Patent and Trademark Office on Mar. 29, 2002, and issued as U.S. Pat. No. 7,609,635, and claims priority to an application filed in the Korean Industrial Property Office on Mar. 29, 2001 and assigned Serial No. 10-2001-0016660, the content of each of which is incorporated herein by reference.1. Field of the InventionThe present invention relates generally to a transmission controlling method in a mobile communication system, and in particular, to a method of controlling reverse transmission.2. Description of the Related ArtWith the phenomenal growth of mobile communication technology, many different mobile communication systems have been proposed and are currently being field- ...

APPARATUS AND METHOD FOR DISTRIBUTED SCHEDULING IN WIRELESS COMMUNICATION SYSTEM

An apparatus is configured to perform a method for performing distributed scheduling by a reception device configuring a target link corresponding to one of a plurality of links in a network in which the plurality of links for device to device communication exist. The method includes adding up resource allocation demand amounts included in resource information broadcasted by a counterpart device configuring the target link and one or more adjacent transmission devices by a preset Resource Unit (RU), and adjusting self resource information in consideration of resource position information included in the broadcasted resource information and the added resource allocation demand amount and transmitting the adjusted self resource information to the counterpart transmission device. 1. A method of performing distributed scheduling by a reception device configuring a target link corresponding to one of a plurality of links in a communication network , the method comprising:adding up resource allocation demand amounts included in resource information broadcasted by a counterpart transmission device configuring the target link and one or more adjacent transmission devices by a preset Resource Unit (RU);adjusting self-resource information in consideration of resource position information included in the broadcasted resource information and the added resource allocation demand amount and transmitting the adjusted self-resource information to the counterpart transmission device;measuring channel quality by a pilot signal received from the counterpart transmission device until data transmission using resources determined based on a predetermined distributed scheduling rule of the broadcasted resource information is performed; andfeeding back channel quality information according to the measurement to the counterpart transmission device.2. The method of claim 1 , wherein the broadcasted resource information includes link identification information claim 1 , a resource allocation ...

SCHEDULING METHOD AND APPARATUS IN SYSTEM PERFORMING DEVICE-TO-DEVICE COMMUNICATION

A link scheduling method in a system for performing Device-to-Device (D2D) communication includes periodically collecting information indicating whether to perform a medium access from at least one neighboring link determining at least one link expected to perform a medium access in a corresponding traffic slot among links with a higher priority than the terminal based on the collected information, and determining whether to perform the medium access of the terminal by considering only the at least one link expected to perform the medium access. 1. A method of a terminal in a system for performing Device-to-Device (D2D) communication , the method comprising:periodically collecting information indicating whether to perform a medium access from at least one neighboring linkdetermining at least one link expected to perform a medium access in a corresponding traffic slot among links with a higher priority than the terminal based on the collected information; anddetermining whether to perform the medium access of the terminal by considering only the at least one link expected to perform the medium access.2. The method of claim 1 , wherein the periodically collecting of the information indicating whether to perform the medium access from the at least one neighboring link comprises;receiving a medium access signal from a Transmit (Tx) terminal of at least one link determined to perform the medium access by listening a duration in which a link scheduling result is transmitted in a link scheduling duration;identifying a link in which the medium access signal is received and a link in which the medium access signal is not received; anddetermining a yield triggering relation for the medium access between the links.3. The method of claim 2 , wherein the yield triggering relation indicates whether a first link allows a second link with a lower priority than the first link to yield the medium access.4. The method of claim 1 , wherein a duration in which the link scheduling result ...

APPARATUS AND METHOD FOR SUPPORTING DEVICE TO DEVICE COMMUNICATION

A method for operating a device in a wireless communication system supporting Device to Device (D2D) communication system includes receiving a reference signal from each of at least one transmitting device, estimating a frequency offset between the reference signals and a comparison reference signal corresponding to the reference signals, and adjusting a transmit frequency of a voltage controlled oscillator of the device using the estimated frequency offset estimation. An apparatus for compensating for a frequency offset of a device in a wireless communication system supporting Device to Device (D2D) communication system includes a frequency offset estimator configured to receive reference signals from each of at least one transmitting device, and estimating a frequency offset between the reference signals and a comparison reference signal corresponding to the reference signals, and a voltage controlled oscillator configured to adjust a transmit frequency using the estimated frequency offset. 1. A method for operating a device in a wireless communication system supporting Device to Device (D2D) communication system , comprising:receiving reference signals from each of at least one transmitting device;estimating a frequency offset between the reference signals and a comparison reference signal corresponding to the reference signals; andadjusting a transmit frequency of a voltage controlled oscillator of the device using the estimated frequency offset.2. The method of claim 1 , wherein estimating the frequency offset between the reference signals and the comparison reference signal comprises:performing complex correlation on a first half interval and a second half interval of the received reference signals and the comparison reference signal;performing a differential operation on the first half interval and the second half interval after the complex correlation; andaveraging phase differences using a result of the differential operation.3. The method of claim 2 , ...

APPARATUS AND METHOD FOR SELECTING PEER DISCOVERY RESOURCE IN DEVICE-TO-DEVICE COMMUNICATION SYSTEM

The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as a long term evolution (LTE). The present invention relates to a method for selecting, by a device, a peer discovery resource (PDR) in a device-to-device (D2D) communication system, the method comprising the steps of: determining a PDR selection range which can be selected by the device; and selecting a PDR in the determined PDR selection range. 1. A method for selecting a peer discovery resource (PDR) by a device in a device-to-device (D2D) communication system , the method comprising:determining a PDR selecting range comprising at least one PDR possible to select in the device; andselecting a PDR in the PDR selecting range.2. The method of claim 1 , further comprising:selecting a new PDR which is different from the selected PDR upon detecting that a collision for the selected PDR occurs while using the selected PDR.3. The method of claim 1 , wherein the PDR selecting range is one of a plurality of PDR groups which are generated by grouping total PDRs which are usable in the D2D communication system.4. The method of claim 1 , wherein the PDR selecting range is selected based on a device identifier (ID) of the device claim 1 , randomly selected claim 1 , or determined based on a PDR selecting range which is allocated by a base station.5. The method of claim 1 , wherein the PDR selecting range is started in a peer discovery interval which is firstly started after the device accesses the D21) communication system.6. The method of claim 1 , wherein selecting the PDR in the PDR selecting range comprises selecting the PDR among the at least one PDRs included in the PDR selecting range based on energy levels of related PDRs claim 1 , randomly selecting the PDR among the at least one PDRs included in the PDR selecting range claim 1 , or selecting the PDR among the at least one PDRs ...

APPARATUS AND METHOD FOR PROVIDING DEVICE-TO-DEVICE COMMUNICATION-BASED SERVICE FOR ISOLATED USER EQUIPMENT IN MOBILE COMMUNICATION SYSTEM

The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as a long term evolution (LTE). 1. A method for providing a device-to-device (D2D) communication-based service for an isolated user equipment (IUE) by a relay user equipment (RUE) in a mobile communication system , the method comprising:establishing a D2D link with an IUE; andsupporting establishment of a relay cellular link for the IUE based on the established D2D link,wherein the RUE is within a service coverage of an enhanced node B (eNB)2. The method of claim 1 , further comprising:receiving a D2D discovery message from the IUE if authentication for the D2D communication is requested in the mobile communication system.3. The method of claim 2 , further comprising:determining to support relay communication for the IUE based on the D2D discovery message.4. The method of claim 3 , further comprising:requesting communication support for the IUE to an eNB to which the RUE belongs upon determining to support the relay communication for the IUE based on the D2D discovery message.5. A method for receiving a device-to-device (D2D) communication-based service by an isolated user equipment (IUE) in a mobile communication system claim 3 , the method comprising:establishing a D2D link with a relay user equipment (RUE) which is within a service coverage of an enhanced node B (eNB); andtransmitting a D2D discovery message to candidate RUEs which exist around the IUE if authentication for the D2D communication is requested in the mobile communication system.6. The method of claim 5 , further comprising:receiving radio resource allocation information for a radio resource which is allocated to the IUE from a serving eNB (SeNB).7. The method of claim 6 , wherein the radio resource is allocated to the IUE when the SeNB succeeds in performing minimum authentication for D2D communication of the IUE ...

Apparatus and Method for Transmitting/Receiving Multiuser Packet in a Mobile Communication System

An apparatus and method is provided for generating one packet with transmission data and transmitting the packet from an access network transceiver system (ANTS) to a plurality of access terminals (ATs) in a mobile communication system including the ATs and the ANTS which are capable of performing packet data communication with ATs located in coverage thereof. The method includes the steps of generating a medium access control (MAC) header including information on a receiving AT's address, a length and format for transmission data, generating a MAC payload, by consecutively connecting data units to be transmitted to the receiving AT, and generating a MAC trailer. The ANTS pads ‘0’ bits to the MAC header if a predetermined MAC size is greater than a sum of lengths of the MAC header, the MAC payload and the MAC trailer. 1. A method for transmitting a medium access control (MAC) packet in a mobile communication system , the method comprising:generating a MAC packet comprising a MAC header, and a MAC payload; andtransmitting the MAC packet to a plurality of terminals,wherein the MAC header comprises multiple of PacketInfo fields corresponding to multiple terminals, respectively,wherein the MAC header and a PacketInfo field are octet aligned, and the PacketInfo field has one octet and includes information for one terminal,wherein the MAC payload comprises multiple packets corresponding to the multiple terminals, respectively,wherein the multiple PacketInfo fields correspond to the multiple packets, respectively, and an order of the PacketInfo fields in the MAC header corresponds to an order of the multiple packets in the MAC payload, andwherein a padding is located after a last packet optionally and a length of the padding is implicit based on a size of the MAC header and a number of the multiple packets.2. The method of claim 1 , wherein the PacketInfo field further comprises a transmission format.3. The method of claim 1 , wherein one of the multiple PacketInfo fields ...

Apparatus and method for generating key hierarchy in wireless network

A method for generating a key hierarchy by a MS in a wireless network is provided. The method includes transmitting an authentication request message to a new BS, receiving an authentication response message as a response message to the authentication request message from the new BS, determining whether to perform a full authentication operation with a H3A server based on the authentication response message, performing the full authentication operation or a crypto-handshake operation with the H3A server based on the determining result, after performing the full authentication operation or the crypto-handshake operation, determining whether a first expected signature value received from the new BS is identical to a first expected signature value calculated by the MS, and if the first expected signature value received from the new BS is equal to a first expected signature value calculated by the MS, determining that an authentication for the new BS has succeeded.

METHOD AND APPARATUS FOR SYNCHRONIZATION FOR DEVICE-TO-DEVICE COMMUNICATION IN UNLICENSED FREQUENCY BANDS

A method and an apparatus for synchronization for Device-to-Device (D2D) communication in unlicensed frequency bands are provided. The method includes determining whether a signal is detected during a preset time period within a synchronization period, after transmitting a synchronization signal during the synchronization period for the D2D communication, when it is determined that the D2D communication is to be performed, and starting the time period for the D2D communication and performing the D2D communication during the time period for the D2D communication, when it is determined that the signal is not detected. 1. A method for synchronization for Device-to-Device (D2D) communication in unlicensed frequency bands , the method comprising:determining whether a signal is detected during a preset time period within a synchronization period, after transmitting a synchronization signal during the synchronization period for the D2D communication, when it is determined that the D2D communication is to be performed; andstarting the time period for the D2D communication and performing the D2D communication during the time period, when it is determined that the signal is not detected.2. The method as claimed in claim 1 , further comprising:readjusting a transmission time point of another synchronization signal when the other synchronization signal is detected during the synchronization period.3. The method as claimed in claim 1 , further comprising:maintaining one of a transmission time of the synchronization signal and a variable for determining the transmission time of the synchronization signal, when a signal having energy greater than or equal to a predetermined energy threshold is detected during the synchronization period.4. The method as claimed in claim 1 , further comprising:avoiding entering the time period for performing the D2D communication, when it is determined that the signal is detected.5. The method as claimed in claim 1 , wherein the synchronization ...

METHOD AND APPARATUS FOR PERFORMING DISTRIBUTED RESOURCE SCHEDULING IN DEVICE-TO-DEVICE COMMUNICATION SYSTEM

A distributed scheduling method in a Device-to-Device (D2D) communication system is provided. The method includes transmitting, to a peer device, first resource information including a link identifier and start position information of resources to be allocated, receiving, from the peer device, second resource information in which at least one of the resource start position information and a resource allocation amount is adjusted based on the first resource information, and determining the resource start position based on the first resource information and second resource information. 1. A distributed scheduling method in a Device-to-Device (D2D) communication system , the distributed scheduling method comprising:transmitting, to a peer device, first resource information including a link identifier and start position information of resources to be allocated;receiving, from the peer device, second resource information in which at least one of the resource start position information and a resource allocation amount is adjusted based on the first resource information; anddetermining the resource start position based on the first resource information and the second resource information.2. The method of claim 1 , wherein the first resource information and the second resource information are broadcasted over common resources.3. The method of claim 1 , wherein the second resource information includes the link identifier and the resource start position information that is adjusted by the peer device.4. The method of claim 1 , wherein the second resource information includes the link identifier claim 1 , the resource start position information that is adjusted by the peer device claim 1 , and the resource allocation amount information.5. The method of claim 1 , further comprising:performing data transmission from the resource start position up to a resource position corresponding to the resource allocation amount; andreceiving, from the peer device, an acknowledgement signal ...

STRUCTURE OF MOBILE TERMINAL OPERATING IN A MOBILE COMMUNICATION SYSTEM SUPPORTING DEVICE TO DEVICE COMMUNICATION AND OPERATION METHOD THEREFOR

A mobile terminal in a mobile communication system supporting device to device (D2D) communication, and a method for operating the mobile terminal are provided. The terminal includes a first radio frequency (RF) chain configured to transmit a mobile communication signal and a second RF chain configured to receive a mobile communication signal, for mobile communication with a base station, a switching unit including a plurality of switches configured to establish transmission and reception paths in the first and second RF chains, and a controller configured to control switching of the switching unit to establish transmission and reception paths of a D2D communication signal for D2D communication by combining a part of the first RF chain with a part of the second RF chain. The combination of the parts of the first and second RF chains is different according to a D2D communication frequency band. 1. A mobile terminal supporting Device to Device (D2D) communication in a mobile communication system , the mobile terminal comprising:a first Radio Frequency (RF) chain configured to transmit a mobile communication signal and a second RF chain configured to receive a mobile communication signal, for mobile communication with a base station;a switching unit including a plurality of switches configured to establish transmission and reception paths in the first and second RF chains; anda controller configured to control switching of the switching unit to establish transmission and reception paths of a D2D communication signal for D2D communication by combining a part of the first RF chain with a part of the second RF chain,wherein the combination of the parts of the first and second RF chains is different according to a D2D communication frequency band allocated in a part of frequency bands for mobile communication.2. The mobile terminal of claim 1 , wherein claim 1 , if the D2D communication frequency band is allocated in an uplink frequency band for mobile communication claim ...

METHOD AND DEVICE FOR MANAGING MOBILITY IN IP BASED NETWORK

A method and a device for managing mobility of a mobile station in an Internet Protocol (IP) based network are provided. The method includes receiving a request for allocation of an IP address from an application, determining a type of IP address to be allocated to the application based on the request for the allocation of the IP address, and allocating the determined type of IP address to the application. 1. A method of managing mobility in an Internet Protocol (IP) based network by a mobile station , the method comprising:receiving a request for allocation of an IP address from an application;determining a type of IP address to be allocated to the application based on the request for the allocation of the IP address; andallocating the determined type of IP address to the application.2. The method of claim 1 , wherein the determined type of IP address comprises one of a first type of IP address anchored to a core network claim 1 , a second type of IP address anchored to an access network claim 1 , and a third type of IP address which is not anchored to any networks.3. The method of claim 1 , further comprising:configuring the determined type of IP address when the determined type of IP address does not exist in an IP stack.4. The method of claim 1 , wherein the type of IP address is determined depending on characteristics of the application.5. The method of claim 2 , wherein the second type of IP address is allocated to the application when an anchor distance is shorter than a threshold value.6. The method of claim 2 , further comprising:receiving a notification for un-configuring the allocated IP address from the application; andun-configuring the allocated IP address when the IP address corresponding to the notification is the first type of IP address or the second type of IP address.7. The method of claim 6 , further comprising:newly configuring the third type of IP address when no IP address is left after un-configuring the allocated IP address.8. The method of ...

APPARATUS AND METHOD FOR AUTHENTICATING ACCESS OF A MOBILE STATION IN A WIRELESS COMMUNICATION SYSTEM

An apparatus and a method for access authentication of a mobile station in a wireless communication system are provided. The method includes receiving a session certificate for the access authentication from a core network, transmitting the session certificate to a new access network during a handover to the new access network, and receiving an authentication result based on the session certificate from the new access network. 1. A method of access authentication of a mobile station in a wireless communication system , the method comprising:receiving a session certificate for the access authentication from a core network;transmitting the session certificate to a new access network during a handover to the new access network; andreceiving an authentication result based on the session certificate from the new access network.2. The method as claimed in claim 1 , wherein the session certificate includes at least one of several pieces of information according to the access authentication of the mobile station.3. The method as claimed in claim 1 , wherein the session certificate is encrypted by using an encryption key known by the mobile station and the core network claim 1 , and is transmitted.4. The method as claimed in claim 1 , wherein the session certificate has a lifetime within a predetermined term.5. The method as claimed in claim 1 , wherein an authentication based on the session certificate is performed by using a Transparent Layer Security (TLS) scheme.6. The method as claimed in claim 1 , wherein the receiving of the session certificate further comprises:receiving a session private key for a decryption of the session certificate along with the session certificate.7. The method as claimed in claim 1 , wherein the mobile station and the access network transmit and receive messages by using an asymmetric cryptography scheme in the access authentication.8. A mobile station for performing access authentication in a wireless communication system claim 1 , the mobile ...

METHOD AND APPARATUS FOR CONTROLLING INTERFERENCE IN DEVICE-TO-DEVICE COMMUNICATION

Disclosed is a method for controlling interference for D2D communication. The method includes: identifying whether a position of a first user device belongs to a first area that satisfies a predetermined criterion; and if the position of the first user device is identified to belong to the first area, determining some resources constituting dedicated resources of the first area, among available resources of a signal for discovering a counterpart user device of D2D communication by the first user device, as resources of the signal. 1. A method for controlling interference for device to device (D2D) communication , the method comprising:identifying whether a position of a first user device belongs to a first area that satisfies a predetermined criterion; andif the position of the first user device is identified as belonging to the first area, determining resources constituting dedicated resources of the first area, among available resources of a signal for discovering a counterpart user device of D2D communication by the first user device, as resources of the signal.2. The method of claim 1 , wherein the predetermined criterion is a number of power levels that are equal to or more than a predetermined threshold of power level is equal to or more than a predetermined value claim 1 , among power levels that are obtained from signals received from nearby user devices by the first user device.3. The method of claim 2 , wherein the predetermined threshold of power level is a default value configured by manufacturers or communication service providers.4. The method of claim 2 , wherein the predetermined threshold of power level is a value based on an accumulation of previously received discovery signals and previous results of a dense area determination.5. The method of claim 2 , wherein a predetermined threshold of power level is based on a power noise (PN) level.6. The method of claim 1 , wherein determining the resources of the signal comprises obtaining dedicated ...

METHOD AND APPARATUS FOR ALLOCATING RESOURCES FOR D2D COMMUNICATION

A method for allocating resources for Device-to-Device (D2D) communication in a transmitting terminal is provided. The method includes receiving broadcast resource allocation information for the D2D communication from a Base Station (BS), and measuring a channel quality of a downlink signal received from the BS and, if the measured channel quality is smaller than a predetermined threshold, conducting the D2D communication using the resource allocation information. 1. A method for allocating resources for Device-to-Device (D2D) communication in a transmitting terminal , the method comprising:receiving broadcast resource allocation information for the D2D communication from a Base Station (BS);measuring a channel quality of a downlink signal received from the BS; andif the measured channel quality is smaller than a predetermined threshold, conducting the D2D communication using the resource allocation information.2. The method of claim 1 , wherein the resource allocation information includes information about a resource area for the D2D communication and power control information for the D2D communication claim 1 , the resource area for the D2D communication being a part of a cellular communication resource area.3. The method of claim 2 , further comprising transmitting data for the D2D communication using the power control information included in the resource allocation information.4. The method of claim 2 , further comprising:if the measured channel quality is larger than the threshold, decreasing transmission power of the transmitting terminal by a predetermined level;determining whether the decreased transmission power is lower than a predetermined transmission power threshold; andif the decreased transmission power is equal to or higher than the predetermined transmission power threshold, conducting the D2D communication using the resource allocation information.5. The method of claim 2 , further comprising:if the decreased transmission power is lower than the ...

Channel structure for discovering terminal in wireless communication system, and power control method and apparatus

The present disclosure provides a method for performing a cellular communication in a device-to-device communication system, the method comprising the operations of: receiving scheduling to transmit an uplink signal through a specific resource of a discovery channel from a base station; generating uplink scheduling information notifying scheduling of the uplink signal; and transmitting the uplink scheduling information through at least one discovery resource of the discovery channel.

METHOD AND APPARATUS FOR MEASURING LINK QUALITY IN WIRELESS COMMUNICATION SYSTEM SUPPORTING DEVICE-TO-DEVICE COMMUNICATION

The present disclosure relates to a device-to-device (D2D) communication for direct communication between nodes in a wireless communication system, wherein an operation method of a terminal includes the steps of: generating sequences, which belong to an orthogonal sequence set, according to a sequence pattern corresponding to a priority of a link; and transmitting the sequences, as signals for measurement of a reception electric power of a counterpart terminal, through sub-blocks within a channel, wherein one sequence is transmitted through each of the sub-blocks. 1. A method for operating a terminal in a wireless communication system supporting device to device (D2D) communication , the method comprising:generating sequences based on a sequence pattern corresponding to a priority of a link for the terminal; andtransmitting the sequences through sub-blocks of a channel,wherein the sequences are used, by a counterpart terminal, to measure a received power.2. A method for operating a terminal in a wireless communication system supporting device to device (D2D) communication , the operation method comprising:generating sequences based on a sequence pattern corresponding to a priority of a link for the terminal;receiving signals including sequences through sub-blocks of a channel; anddetermining received power for each of the sub-blocks by using the sequences.3. The method of claim 2 , further comprising:determining one or more sub-blocks, in which sequence collision occurs, by using at least one sequence pattern corresponding to at least one priority for one or more other links; anddetermining a channel quality of a whole band by using received power of the remaining sub-blocks except for the one or more sub-blocks in which the collision occurs.4. An apparatus for a terminal in a wireless communication system supporting device to device (D2D) communication claim 2 , the apparatus comprising:a controller for generating sequences included in an orthogonal sequence set ...

METHOD AND APPARATUS FOR CONTROLLING TRANSMISSION POWER OF DEVICE-TO-DEVICE COMMUNICATION NETWORK

The present invention is to provide a method and device for controlling transmission power by taking comprehensive consideration not only of the effect received onto itself in each device-to-device (D2D) link of a D2D communication network but also of the effect exerted onto the neighboring links. According to an embodiment of the present invention, a processing method in a transmission terminal of a first link for controlling the transmission power of the transmission terminals of links in a D2D communication network, which includes terminals of at least the first link and terminals of a second link adjacent to the first link includes: measuring the strengths of first detection signals transmitted from reception terminals of the first link and the second link; and determining a first transmission power adjustment ratio for the transmission terminal of the first link so that a signal-to-interference ratio of the second link is greater than or equal to a predetermined threshold value on the basis of the measured strengths of the first detection signals. 1. A processing method , which is performed by a transmission terminal of a first link , for controlling transmission power of transmission terminals of links in a device to device (D2D) communication network which includes terminals of at least the first link and terminals of a second link adjacent to the first link , the processing method comprising:measuring the strengths of first detection signals transmitted from reception terminals of the first link and the second link; anddetermining a first transmission power adjustment ratio for the transmission terminal of the first link so that a signal-to-interference ratio of the second link is greater than or equal to a predetermined threshold value on the basis of the measured strengths of the first detection signals.2. A transmission terminal device of a first link for controlling transmission power of transmission terminals of links in a device to device (D2D) ...

Apparatus and Method for Transmitting and Receiving Packet Data Using Multiple Antennas in a Wireless Communication System

An apparatus and method for transmitting and receiving packet data using multiple antennas in a wireless communication system is provided. In a wireless communication, system using multiple antennas, the apparatus and method can efficiently transmit and receive packet data according to channel conditions without a waste of transmission bandwidth.

Method, apparatus, and system for negotiating a session between an access terminal and an access network in a high rate packet data system

A method, apparatus, and system for negotiating a session between an access terminal (AT) and an access network (AN) that can simplify a repeated negotiation procedure when the session is configured/updated/deleted between the AT and the AN. The AN performs protocol-by-protocol negotiations with the AT for a session configuration. The AN sends, to the AT, a soft configuration complete message including a continue bit indicating if another session configuration is added. The AN and the AT store a negotiated session configuration mapped to a personality index indicated in the message. When all session configurations have been completed, the AN and the AT determine if a session configuration currently in use has been changed. If the session configuration in use has not been changed, the AT and the AN maintain a physical channel. Moreover, the AN sends information indicating if a specific session configuration is applied after session configuration negotiation is completed.

Method and system for providing status information for broadcast/multicast service in a mobile communication system

Apparatus and method for controlling power of reverse channels in a mobile communication system

Disclosed is an apparatus for performing power control on a CQICH in a mobile communication system including the base station for transmitting a power control bit for power control on reverse channels and the mobile station for controlling transmission power of the reverse channels according to the power control bit. An erasure detector determines whether to perform an erasure process by measuring reception power of the reverse channel quality indicator channel. An erasure rate calculator accumulates the erasure-determined result for N slots and calculates an erasure rate for the N slots. A control bit generator determines a ratio control bit to be transmitted to the mobile station according to the erasure rate, to issue a command to increase or decrease a CQICH traffic-to-pilot ratio.

Dedicated control channel handoff in cdma communication system

A handoff method in a CDMA communication system using Walsh codes and quasi-orthogonal codes. To implement a handoff, a new base station to which a call is switched notifies a serving base station of an available quasi-orthogonal code, if the new base station has no available Walsh codes. The serving base station transmits a handoff direction message to a mobile station and the mobile station communicates with the new base station using the quasi-orthogonal code included in the handoff direction message.

Apparatus and method for transmitting/receiving packet data symbol in a mobile communication system

Method and apparatus for adaptive location registration in mobile station

A method and apparatus for adaptive location registration in an MS is disclosed. If a received signal strength is relatively great, the MS increases its location registration period, and if the received signal strength is relatively small, it decreases its location registration period. If the MS moves relatively fast, it decreases its location registration period, and if it moves relatively slow, it increases its location registration period. If the MS moves fast and a signal strength variance is great, the MS registers its location before the location registration period expires. Therefore, unnecessary registration message transmission is reduced and cell capacity waste is minimized. The adaptive location registration is effective especially in a broadcasting service requiring periodic location registration.

Device and method for gating transmission in a cdma mobile communication system

A method for determining a gating rate in a base station for a CDMA communication system is disclosed. The method comprises transmitting information for assigning a dedicated control channel and a traffic channel to a mobile station, when a call is generated; after call setup, transmitting a message requesting mobile station's capability information to the mobile station; receiving the capability information including gating availability information of a reverse pilot signal and information about at least one gating rate, transmitted from the mobile station in reply to the request message; and determining a gating rate according to the capability information, transmitting information about the determined gating rate to the mobile station, and transitioning to an active state. The mobile station's capability information includes information about gating availability and at least one gating rate, when gating is available.

Data transmitting/receiving method in harq data communication system

There is provided a data transmitting/receiving method in an HARQ data communication system. To transmit a physical layer information stream having a plurality of sub-blocks, each sub-block having an error correction code, a QoS (Quality of Service), and a priority if the sub-blocks has a different QoS, the encoded physical layer information stream is divided into a plurality of slots. The slot data are sequentially transmitted to a receiver in predetermined time intervals. If an HARQ (Hybrid Automatic Repeat Request) message for the initial slot data is received from the receiver, indicating that at least one of the sub-block in the initial slot data has a reception error and the other sub-blocks are good in reception, slot data with a sub-block having an error repeated within the number of the sub-blocks is retransmitted after transmission of initial slot data.

Method and system for generating plcm for bcmcs in a mobile communication system

Disclosed is a method for generating a public long code mask (PLCM) so that a mobile station can receive a Broadcast/Multicast Service (BCMCS), in a mobile communication system including a base station and at least one mobile station located in a cell occupied by the base station, the BCMCS being provided from the base station to the mobile station. The PLCM is created by a combining a BCMCS flow identifier (BCMC FLOW ID) and a BCMC service reference identifier (BSR ID) matched thereto from a BCMCS service parameter message (BSPM) including information related to the BCMC FLOW IDs indicating individual flow IDs for identifying flows from respective broadcasting stations and BSR IDs matched to the BCMC FLOW IDs, the BSPM being transmitted from the base station to the mobile station over at least one channel.

Reverse link control method in a mobile communication system

A reverse link control method in a mobile communication system. To increase or decrease a reverse data rate, an MS receives access probabilities for at least one-level rate increases and decreases from each available data rate from a serving BS and stores them. Upon receipt of a reverse data rate increase or decrease command from the BS, the MS reads access probabilities for a current data rate and generates a random number. Then it compares the random number with the read access probabilities and, if the random number satisfies the read access probabilities, it increases or decreases its current data rate by one or more levels according to the read access probabilities.

Apparatus and method for exchanging variable-length data according to a radio link protocol in a mobile communication system

Device and method for sending or receiving a packet in mobile telephone systems

Method and system for providing status information for broadcast/multicast service in a mobile communication system

In response to a BCMCS service request from a mobile station, a base station separately informs the mobile station whether the requested BCMCS service is available. Thus, the base station can include only broadcast channel information necessary for actual broadcast in a broadcasting overhead messag e, and if the BCMCS service is stopped or unavailable, the base station can ord er the mobile station to interrupt the BCMCS service, thereby reducing the load on system resources.

Method and system for providing status information for broadcast/multicast service in a mobile communication system

In response to a BCMCS service request from a mobile station, a base station separately informs the mobile station whether the requested BCMCS service is available. Thus, the base station can include only broadcast channel information necessary for actual broadcast in a broadcasting overhead message, and if the BCMCS service is stopped or unavailable, the base station can order the mobile station to interrupt the BCMCS service, thereby reducing the load on system resources.

Apparatus and method for fast call setup in a mobile communication system

Disclosed is a method for performing call setup in a mobile communication system having a base station for serving a mobile station , and a mobile switching center for controlling the base station. At the onset of entry of a recipient's phone number, the mobile station transmits an origination message to the base station, and the base station responds to the origination message from the mobile station, and assigns wireless channels to the mobile station. The mobile station transmits to the base station an origination continuation message, if assignment of the wireless channels is completed and receiving of the recipient's phone number is completed. Upon receiving the origination continuation message, the base station requests the mobile switching center to perform call setup in a wired section.

Apparatus and method for controlling power of reverse channels in a mobile communication system

Disclosed is an apparatus for performing power control on a reverse channel quality indicator channel (CQICH) received from a mobile station by a base station in a mobile communication system including the base station for transmitting a power control bit for power control on reverse channels and the mobile station for controlling transmission power of the reverse channels according to the power control bit. An erasure detector determines whether to perform an erasure process by measuring reception power of the reverse channel quality indicator channel. An erasure rate calculator accumulates the erasure-determined result for N slots and calculates an erasure rate for the N slots. A control bit generator determines a ratio control bit to be transmitted to the mobile station according to the erasure rate, to issue a command to increase or decrease a CQICH traffic-to-pilot ratio.

Method of controlling reverse transmission in a mobile communication system

An apparatus and method for controlling a reverse data rate in a mobile station. The method includes determining whether the mobile station has sufficient power to transmit at an increased data rate compared to a current data rate, and transmitting a determination result to a base station.

Apparatus and method for transmitting/receiving packet data symbols in a mobile communication system

Data transmitting and receiving method in a mobile communication system

A PLP transmitting method in a mobile communication system is provided. A base station determines a forward data rate according to DRC information received from a mobile station, reads out temporary EPs of a maximum total size from the buffers, determines whether the temporary EPs can be transmitted at the data rate, forms a combination of logical EPs from the temporary EPs if the temporary EPs can be transmitted at the data rate and the total size of the temporary EPs is equal to or greater than a threshold, and transmits the logical EPs in a PLP.

Method and apparatus for transmitting different data types in a wireless packet data communication system

A method and apparatus for encapsulating a PDU in a wireless packet data communication system. In a system providing voice and high-rate packet data services, an LAC layer and an RLP layer generate SDUs of MuxPDU Type 1, 2 , or 4 with signaling information and RLP_control information. A MAC layer determines whether to transmit the SDUs on a PDCH supporting MuxPDU Type 5 . If the PDCH is connected, the MAC layer encapsulates the SDUs with a MuxPDU Type 5 header and an extension header having encapsulation information, thereby generating MuxPDUs of MuxPDU Type 5 . A physical layer transmits the MuxPDUs on the PDCH.

Method of controlling reverse transmission in a mobile communication system

A reverse transmission controlling method in a mobile communication system, after receiving forward information, commanding the increase or decrease of the reverse data rate received on a forward control channel from a base station, a mobile station determines whether the previous rate increase available information transmitted to the base station on a reverse control channel before reception of the forward information indicates that a reverse data rate increase is available, if the forward information commands a reverse data rate increase. The mobile station increases the current reverse data rate to a data rate equal to or less than a maximum reverse data rate if the rate increase available information indicates that the reverse data rate increase is available, and transmits reverse data at the increased reverse data rate.

Transmission apparatus and method for multimedia service in mobile communication system

Data transmitting and receiving method in a mobile communication system

A PLP transmitting method in a mobile communication system is provided. A base station determines a forward data rate according to DRC information received from a mobile station, reads out temporary EPs of a maximum total size from the buffers, determines whether the temporary EPs can be transmitted at the data rate, forms a combination of logical EPs from the temporary EPs if the temporary EPs can be transmitted at the data rate and the total size of the temporary EPs is equal to or greater than a threshold, and transmits the logical EPs in a PLP.

Common channel communication device and method supporting various data rates in mobile communication system

A common channel communication method for a base station in a mobile communication system including common channels, each of which support at least two data rates. The method comprises determining a data rate of the common channel available in a common channel service state and a frame length serviceable at the determined data rate, transmitting a message including information about the determined data rate and frame length on a specific forward common channel before transmission; and upon receipt of an acknowledge message through a specific reverse common channel, setting a data rate and a frame length of the common channel to the determined values.

Dedicated control channel handoff in CDMA communication system

Dedicated control channel handoff in cdma communication system

A handoff method in a CDMA communication system using Walsh codes and quasi-orthogonal codes. To implement a handoff, a new base station to which a call is switched notifies a serving base station of an available quasi-orthogonal code, if the new base station has no available Walsh codes. The serving base station transmits a handoff direction message to a mobile station and the mobile station communicates with the new base station using the quasi-orthogonal code included in the handoff direction message.

Apparatus and method for transmitting and receiving packet data using multiple antennas in a wireless communication system

Apparatus and method for designating frame offset of supplemental channel in a cdma communication system

An apparatus for receiving data transmitted over fundamental channels having a predetermined frame offset for a plurality of mobile stations and supplemental channels assigned in association with the fundamental channels. In the apparatus, a timing generator receives a frame offset of the fundamental channel, a frame offset of the supplemental channel and a system time, outputs the system time delayed by the frame offset of the fundamental channel as a fundamental channel boundary signal, and outputs the system time delayed by the frame offset of the supplemental channel as a supplemental channel boundary signal. A first symbol combiner combines multi-path symbols transmitted over the fundamental channel. A second symbol combiner combines multi-path symbols transmitted over the supplemental channel. A first deinterleaver receives the symbols and the fundamental channel boundary signal from the first symbol combiner, and deinterleaves the symbols from the first symbol combiner in a frame unit determined by the fundamental channel boundary signal. A second deinterleaver receives the symbols and the supplemental channel boundary signal from the second symbol combiner, and deinterleaves the symbols from the second symbol combiner in a frame unit determined by the supplemental channel boundary signal.

Channel assigning device and method in cdma communication system

A device and method for assigning a channel in a CDMA communication system. According to an embodiment of the present invention, in a channel assigning method for a base station, the base station determines the states of orthogonal codes and quasi-orthogonal code masks when a channel is assigned, selects an available quasi-orthogonal code mask number and orthogonal code index if it is determined that a quasi-orthogonal code should be used, and generates the quasi-orthogonal code. Then, the base station assigns the generated quasi-orthogonal code to a forward link dedicated channel, generates a channel assignment message, and transmits the channel assignment message on a different channel to a mobile station.

Data transmitting and receiving method in a mobile communication system

Apparatus and method for controlling a reverse traffic rate in a mobile communication system

A system and method for controlling data rates of a reverse packet data in mobile communication system for transmitting reverse packet data from a mobile station to a base station over a reverse packet data channel at a plurality of data rates. The present invention provides an apparatus and method for improving throughput of an entire system by enabling a base station's scheduler to rapidly assign reverse resource for a mobile station that has completed its data transmission to other mobile stations.

Apparatus and method of controlling reverse transmission in a mobile communication system

A reverse transmission controlling method in a mobile communication system. After receiving forward information commanding a reverse data rate change on a forward channel from a base station, a mobile station increases its reverse data rate to a data rate equal to or lower than a maximum data rate if the forward information commands a reverse data rate increase, determines whether the increased data rate can be further increased for the next frame, and transmits the determination result with information representing the increased data rate to the base station.

Common channel communication device and method supporting various data rates in mobile communication system

Dedicated control channel handoff in cdma communication system

A handoff method in a CDMA communication system using Walsh codes and quasi-orthogonal codes. To implement a handoff, a new base station to which a call is switched notifies a serving base station of an available quasi-orthogonal code, if the new base station has no available Walsh codes. The serving base station transmits a handoff direction message to a mobile station and the mobile station communicates with the new base station using the quasi-orthogonal code included in the handoff direction message.

Apparatus and method for transmitting/receiving packet in a mobile communication system

A method and apparatus are provided for receiving, by an access network (AN), reception strength of a forward pilot channel, measured and reported by each access terminal (AT), as forward data rate information, and transmitting packet data to each AT according to the forward data rate information. When the number of repeated transmission slots for packet data transmitted based on the forward data rate information is greater than or equal to two, the AN repeatedly transmits the packet data as many times as the number of slots, which is less than the number of repeated transmission slots, and transmits new packet data through the remaining slots.

APPARATUS AND METHOD FOR TRANSMITING / RECEIVING PACKAGE DATA SYMBOL IN A MOBILE COMMUNICATION SYSTEM

aparelho e método para transmitir/receber símbolo de dado de pacote em um sistema de comunicação móvel. um aparelho e método para transmitir um símbolo de dado de pacote em um sistema de comunicação móvel de dados de pacote de alta velocidade (hrpd) para serviço de difusão. um processador de transmissão gera um símbolo modulado ao codificar, entrelaçar e modular um pacote de camada física a ser transmitido, e dispõe o símbolo modulado em um tom de dados. o insersor de tom insere um tom de guarda e um tom piloto dentro do tom de dados. o alocador de energia de tom fixa uma proporção de energia piloto-a-tom de dados diferente de acordo com a posição de um intervalo, em que o símbolo de dado de pacote está incluído, e aloca energia de acordo com a proporção de energia piloto-a-tom de dados. o transmissor transmite o símbolo de dado de pacote. apparatus and method for transmitting / receiving packet data symbol in a mobile communication system. an apparatus and method for transmitting a packet data symbol in a high speed mobile packet data (hrpd) communication system for broadcast service. A transmission processor generates a modulated symbol by encoding, interlacing, and modulating a physical layer packet to be transmitted, and arranging the modulated symbol in a data tone. the tone inserter inserts a guard tone and a pilot tone within the data tone. the tone energy allocator sets a different data pilot-to-tone energy ratio according to the position of a range, where the packet data symbol is included, and allocates energy according to the pilot energy ratio -to-tone data. The transmitter transmits the packet data symbol.

Device and method for transmitting multimedia data in mobile communication system

There is provided a novel architecture for transmitting multimedia data with different QoSs in a mobile communication system. In a protocol structure according to the present invention, an RLP layer receives data with different QoSs and dividing the data into datagrams according to the QoSs, a MUX layer multiplexes the datagrams received from the RLP layer and outputs multiplexed TU data, and a QCCH receives the multiplexed TU data and outputs TU blocks with the QoSs by puncturing and repeating information added according to the QoSs for the multiplexed TU data.

Security method for broadcasting service in a mobile communication system

Disclosed is a method for receiving an encrypted broadcasting service by an access terminal in a mobile communication system including an access node for providing a broadcasting service to the access terminal over a radio channel and a packet data service node for connecting the access node to a broadcasting server via a packet data network. The method includes receiving a mask parameter message including a mask value for reception of a desired broadcasting service, from the access node; receiving a broadcasting service packet including a masked seed and a broadcast security packet, from the access node over a radio broadcast channel; calculating a particular seed using the masked seed value and the mask value, and generating an encryption key using the calculated seed and a previously received broadcast access key; and decrypting the broadcast security packet using the encryption key.

A device and method for transmitting and receiving a packet in a mobile telephone system

Apparatus and method for fast call setup in a mobile communication system

Disclosed is a method for performing call setup in a mobile communication system having a base station for serving a mobile station, and a mobile switching center for controlling the base station. At the onset of entry of a recipient's phone number, the mobile station transmits an origination message to the base station, and the base station responds to the origination message from the mobile station, and assigns wireless channels to the mobile station. The mobile station transmits to the base station an origination continuation message, if assignment of the wireless channels is completed and receiving of the recipient's phone number is completed. Upon receiving the origination continuation message, the base station requests the mobile switching center to perform call setup in a wired section.

Apparatus and method for transmitting and receiving a multi-user packet in a mobile communication system

An apparatus and method for transmitting and receiving a multi-user packet in a mobile communication system are provided. The mobile communication system includes an Access Network Transceiver System (ANTS) for communicating with Access Terminals (ATs) and the ATs for performing packet data communication within an area of the ANTS. The ANTS generates and transmits one packet with data to be transmitted to the ATs. The ATs receive the packet. The apparatus and method can support more than a specific number of ATs with the support of an existing system by correcting a header of the multi-user packet, and can support a number of users increased on a carrier-by-carrier basis without changing a physical transmission structure of an existing Evolution Data Only (EVDO) system.

Method and apparatus for generating packet data to support multiple services in a wireless packet data communication system

A packet data generating method and apparatus for supporting multiple services in a wireless packet data communication system where an MS transmits two or more traffics to a BS on one of a reverse PDCH, a reverse FCH, and a reverse DCCH. To generate a PDU using non-signaling traffic and/or signaling traffic for one of the reverse physical channels, a multiplex option is determined during service negotiations between the MS and the BS. The multiplex option defines a traffic format having a header and a payload including traffic data, and the header includes a service reference identifier field, a length indicator field indicating the presence or absence of a length field, and the length field indicating the length of the traffic data. A PDU is generated by formatting a reverse traffic to have a header and a payload according to the determined multiplex option.

Data transmitting and receiving method in a mobile communication system

A PLP transmitting method in a mobile communication system is provided. A base station determines a forward data rate according to DRC information received from a mobile station, reads out temporary EPs of a maximum total size from the buffers, determines whether the temporary EPs can be transmitted at the data rate, forms a combination of logical EPs from the temporary EPs if the temporary EPs can be transmitted at the data rate and the total size of the temporary EPs is equal to or greater than a threshold, and transmits the logical EPs in a PLP.

Apparatus and method for initiating a broadcast service by a mobile station in a mobile communication system

An apparatus and method for initiating a broadcast service in a mobile communication system. During a broadcast service from a base station(BS), a mobile station (MS) receives configuration information for neighbor BSs from the service BS. The configuration information indicates whether a handoff from the service BS to the neighbor BSs is possible and whether the neighbor BSs are providing the broadcast service. During a handoff to a new BS, if the new BS is a neighbor BS of the service BS and the new BS is not providing the broadcast service, the MS requests the new BS to initiate the broadcast service. If there is a BS not providing the broadcast service, the MS requests the service BS to initiate the broadcast service. The service BS then requests the neighbor BSs to initiate the broadcast service.

Method for Providing Interactive Data Service on a Mobile Communication System

"método para fornecer serviço de dados interativos em um sistema de comunicação móvel". método para fornecer um serviço de dados interativos entre uma estação base e uma estação móvel em um sistema de comunicação móvel que inclui pelo menos uma estação móvel, a estação base que se comunica com a estação movel, e um servidor conectado à estação base. a estação base transmite simultaneamente dados transmitidos do servidor, para um ou mais estações móveis por um canal comum de encaminhamento. uma determinada estação móvel que recebe o serviço através do canal comum transmite dados de transmissão reversa por um canal dedicado. "method for providing interactive data service in a mobile communication system". A method for providing an interactive data service between a base station and a mobile station in a mobile communication system that includes at least one mobile station, the base station communicating with the mobile station, and a server connected to the base station. The base station simultaneously transmits data transmitted from the server to one or more mobile stations via a common forwarding channel. a particular mobile station receiving service over the common channel transmits reverse transmission data over a dedicated channel.

Method for processing data to be transmitted over common channel

A method for processing a common channel message in a CDMA communication system. The method includes mapping a signaling message generated in a Layer 3, a medium access control (MAC) message generated in a MAC sublayer and user data, to be transmitted over common channels to corresponding common logical channels; adding identifiers corresponding to common logical channels to the received signaling messages; processing the common logical channel identifier-added messages according to a common radio burst protocol using a single sequence number, and mapping the messages processed according to the common radio burst protocol to corresponding common channels.

Apparatus and method for transmitting/receiving packet data symbol in a mobile communication system

An apparatus and method transmits a packet data symbol in a high-rate packet data (HRPD) mobile communication system for broadcasting service. A transmission processor generates a modulated symbol by encoding, interleaving and modulating a physical layer packet to be transmitted, and arranges the modulated symbol in a data tone. A tone inserter inserts a guard tone and a pilot tone into the data tone. A tone power allocator sets a different pilot-to-data tone power ratio according to a position of a slot, in which the packet data symbol is included, and allocates power according to the pilot-to-data tone power ratio. A transmitter transmits the packet data symbol.

Data transmitting/receiving method in HARQ data communication system

Data communication method in mobile communication system

Apparatus and method for exchanging variable-length data according to radio link protocol in mobile communication system

Method and apparatus for generating packet data to support multiple services in a wireless packet data communication system

Method for providing interactive data service in a mobile communication system

Apparatus and method for transmitting packet data using multiple antennas in a wireless communication system

An apparatus and method for transmitting packet data using multiple transmission and reception antennas in a wireless communication system are provided. The apparatus receives channel status information between the antennas as feedback information. A feedback signal receiver receives the feedback information including preferred basis transform information. A user classifier classifies users having transmission data streams into groups using the preferred basis transform information, classifying the streams according to the classified groups. A scheduling and demultiplexing block demultiplexes the streams into substreams, selecting a group according to a priority of the group, and selecting a demultiplexed substream according to a priority of the substreams or the user. An Adaptive Modulation and Coding (AMC) block modulates and codes the selected substream. A power allocator allocates transmission power. A transmitter transmits the power-allocated substream through each of the transmission antennas. Packet data can be efficiently transmitted according to channel conditions without wasting bandwidth.

Data transmitting/receiving method in harq data communication system

There is provided a data transmitting/receiving method in an HARQ data communication system. To transmit a physical layer information stream having a plurality of sub-blocks, each sub-block having an error correction code, a QoS (Quality of Service), and a priority if the sub-blocks has a different QoS, the encoded physical layer information stream is divided into a plurality of slots. The slot data are sequentially transmitted to a receiver in predetermined time intervals. If an HARQ (Hybrid Automatic Repeat Request) message for the initial slot data is received from the receiver, indicating that at least one of the sub-block in the initial slot data has a reception error and the other sub-blocks are good in reception, slot data with a sub-block having an error repeated within the number of the sub-blocks is retransmitted after transmission of initial slot data.

Apparatus and method for allocating resources in an orthogonal frequency division multiple access mobile communication system

A method for receiving resources allocated from a base station by a terminal in an OFDMA mobile communication system. The method includes receiving, for a data channel, a number of first components, which indicates an amount of resources used with a first resource allocation scheme, and a number of second components, which indicates an amount of resources used with a second resource allocation scheme, from the base station over a common control channel; determining first and second identifier lengths of channel elements for the first and second resource allocation schemes according to the number of first components and the number of second components; receiving resource allocation information including an identifier indicating at least one channel element allocated to the terminal, over a data control channel using one of the identifier lengths; and transmitting and receiving data over a resource of a channel element indicated by the received identifier.

Method and device for managing security key for communication authentication of subscriber station used in cooperative communication of multiple base station in radio communication system

Apparatus and method for exchanging variable-length data according to radio link protocol in mobile communication system

An information frame of a new format transmitted according to a radio link protocol (RLP), and a device and method for transmitting and receiving the information frame in a mobile communication system. The information frame is comprised of a plurality of consecutive multiplex frames each having a given length. The multiplex frames each are comprised of a header and a succeeding RLP frame, and the RLP frame includes transmission data. At least one of the multiplex frames is comprised of a plurality of sub-multiplex frames, and each sub-multiplex frame is comprised of a header including an RLP service identifier field and a length indication field for indicating a length of the transmission data, and a data block associated to the succeeding RLP frame.

Method and device for controlling reverse transmission in a mobile communication system

Apparatus and method for transmitting/receiving data in a mobile communication system using multiple antennas

An apparatus and method for transmitting/receiving data in a mobile communication system using multiple antennas are provided. A receiver estimates a fading channel of received data, selects a weight set relative to a maximum data transmission rate from at least one weight set with elements of a plurality of orthogonal weight vectors, and transmits feedback information including the selected weight set and channel-by-channel state information to a transmitter. The transmitter demultiplexes data to be transmitted on a basis of the feedback information into at least one sub-data stream, multiplies each sub-data stream by an associated weight, and transmits the data.

Apparatus and method for allocating resources and performing communication in a wireless communication system

Disclosed is a method for allocating resources in a base station of a wireless communication system that performs communication using frequency resources. The method includes dividing subcarriers into subcarrier sets each including a predetermined number of consecutive subcarriers, and generating a resource index table mapped to consecutive indexes such that a distance between subcarriers in the subcarrier sets is maximized; and determining an amount of resources to be transmitted through a downlink according to a channel condition, for data to be transmitted to each terminal, and allocating resources to the terminal using the index value in the resource index table.

Apparatus and method for controlling a reverse traffic rate in a mobile communication system

A system and method for controlling data rates of a reverse packet data in mobile communication system for transmitting reverse packet data from a mobi le station to a base station over a reverse packet data channel at a plurality of data rates. The present invention provides an apparatus and method for improving throughput of an entire system by enabling a base station's scheduler to rapidly assign reverse resource for a mobile station that has completed its data transmission to other mobile stations.

Method and apparatus for transmitting ack/nack information in an orthogonal frequency division multiple access system based on time division duplexing

ABSTRACT A method is provided for transmitting control information by a Base Station (BS) in a Time Division Duplexing (TDD)-based Orthogonal Frequency Division Multiple Access (OFDMA) system. The method includes determining a TDD ratio value; when a value obtained by dividing a number of consecutive Forward-Link (FL) time slots of a predetermined time interval by a number of consecutive Reverse-Link (RL) time slots is not a positive integer, grouping Mobile Stations (MSs) into multiple groups and generating group index information; and transmitting, to the MSs, control information including the TDD ratio value and the group index information.

Data transmitting and receiving method in a mobile communication system

A PLP transmitting method in a mobile communication system is provided. A base station determines a forward data rate according to DRC information received from a mobile station, reads out temporary EPs of a maximum total size from the buffers, determines whether the temporary EPs can be transmitted at the data rate, forms a combination of logical EPs from the temporary EPs if the temporary EPs can be transmitted at the data rate and the total size of the temporary EPs is equal to or greater than a threshold, and transmits the logical EPs in a PLP.

Method for transmitting and receiving broadcast service data in an OFDMA wireless communication system

A method for providing two or more broadcast services in an orthogonal frequency division multiple access (OFDMA) wireless communication system. The method comprises the steps of separately receiving broadcast services to be transmitted, and independently performing coding, interleaving and modulation on the broadcast services according to a required quality for each of the broadcast services; segmenting each of the modulated broadcast signals into minimum transmission units; time-division-multiplexing the segmented broadcast service signals; configuring a frame comprising information on the broadcast service in physical layer transmission information transmitted together with the broadcast service; and transmitting the frame.

An apparatus and method for transmitting and receiving data according to radio link protocol in a mobile communications system

Disclosed are an apparatus and a method for retransmitting a failing RLP frame assigned with a new unique identifier agreed to between the transmitting and receiving RLP processors instead of the original sequence number. The receiving RLP processor requests the transmitting RLP processor to retransmit a failing RLP frame assigned with a new identifier determined by the receiving RLP processor. Responding to the request, the transmitting RLP processor retransmits the failing RLP frame assigned with the requested new identifier instead of the original sequence number.

Transmission apparatus and method for multimedia service in mobile communication system

A scheduling method for providing multimedia service and packet data service efficiently. The scheduling is a Round-Robin scheduling in an MQC (Multiple Quality Control) protocol structure. A transmitter in a base station transmits or retransmits TUs from different streams in a PLP using priority queues by the scheduling.

Method and apparatus for generating packet data to support multiple services in a wireless packet data communication system

A packet data generating method and apparatus for supporting multiple services in a wireless packet data communication system where an MS transmits two or more traffics to a BS on one of a reverse PDCH, a reverse FCH, and a reverse DCCH. To generate a PDU using non-signaling traffic and/or signaling traffic for one of the reverse physical channels, a multiplex option is determined during service negotiations between the MS and the BS. The multiplex option defines a traffic format having a header and a payload including traffic data, and the header includes a service reference identifier field, a length indicator field indicating the presence or absence of a length field, and the length field indicating the length of the traffic data. A PDU is generated by formatting a reverse traffic to have a header and a payload according to the determined multiplex option.

Method and apparatus for performing synchronization in device-to-device network

A method and an apparatus for performing synchronization by a first device in a Device-to-Device (D2D) network are provided. The method includes detecting a synchronization signal from at least one second device during one period, determining a phase adjustment value depending on a number of synchronization signals, which have been detected from the at least one second device during the one period, adjusting a phase value of a first device using the phase adjustment value, and transmitting a synchronization signal if the phase value of the first device reaches a predetermined specific value.

Method of controlling reverse transmission in a mobile communication system

A reverse transmission controlling method in a mobile communication system, after receiving forward information, commanding the increase or decrease of the reverse data rate received on a forward control channel from a base station, a mobile station determines whether the previous rate increase available information transmitted to the base station on a reverse control channel before reception of the forward information indicates that a reverse data rate increase is available, if the forward information commands a reverse data rate increase. The mobile station increases the current reverse data rate to a data rate equal to or less than a maximum reverse data rate if the rate increase available information indicates that the reverse data rate increase is available, and transmits reverse data at the increased reverse data rate.

Apparatus and method for transmitting/receiving data in a mobile communication system using multiple antennas

An apparatus and method for transmitting/receiving data in a mobile communication system using multiple antennas are provided. A receiver estimates a fading channel of received data, selects a weight set relative to a maximum data transmission rate from at least one weight set with elements of a plurality of orthogonal weight vectors, and transmits feedback information including the selected weight set and channel-by-channel state information to a transmitter. The transmitter demultiplexes data to be transmitted on a basis of the feedback information into at least one sub-data stream, multiplies each sub-data stream by an associated weight, and transmits the data.

Apparatus and method for supporting device to device communication

A method for operating a device in a wireless communication system supporting Device to Device (D2D) communication system includes receiving a reference signal from each of at least one transmitting device, estimating a frequency offset between the reference signals and a comparison reference signal corresponding to the reference signals, and adjusting a transmit frequency of a voltage controlled oscillator of the device using the estimated frequency offset estimation. An apparatus for compensating for a frequency offset of a device in a wireless communication system supporting Device to Device (D2D) communication system includes a frequency offset estimator configured to receive reference signals from each of at least one transmitting device, and estimating a frequency offset between the reference signals and a comparison reference signal corresponding to the reference signals, and a voltage controlled oscillator configured to adjust a transmit frequency using the estimated frequency offset.

Method and system for providing status information for broadcast/multicast service in a mobile communication system