METHOD AND APPARATUS FOR ADJUSTING A BEAM SWEEPING PATTERN IN WIRELESS COMMUNICATION SYSTEM

The present disclosure relates to a pre-5-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4-Generation (4G) communication system such as Long Term Evolution (LTE). Embodiments of the present invention provide a method and an apparatus for adaptively determining a beam sweeping pattern of a base station in a beamforming-based wireless communication system. An embodiment of the present invention provides an operating method of a serving base station in a wireless communication system, the operating method comprising: receiving, from at least one terminal, beam collision information indicating a collision between beams received from the serving base station and at least one neighboring base station adjacent to the serving base station; and adjusting a beam sweeping pattern of a beam transmitted to the at least one terminal on the basis of the received beam collision information. Various other embodiments of the present invention are also disclosed. 115.-. (canceled)16. A method of a serving base station (BS) in a wireless communication system , the method comprising:determining a beam sweeping pattern based on a beam and resources for a signal which is transmitted to at least one terminal;receiving, from the at least one terminal, beam collision information indicating a collision of beams transmitted from the serving BS and at least one neighboring BS; andadjusting, based on the beam collision information, the beam sweeping pattern.17. The method of claim 16 , wherein the beam collision information is determined based on a signal quality of a beam selected among a plurality of beams transmitted from the serving BS and a signal quality of a beam selected among a plurality of beams transmitted from the neighboring BS.18. The method of claim 16 , further comprising:detecting the collision of beams; andtransmitting a request for the beam collision information to the at least one terminal.19. The method of claim 16 , further ...

METHOD AND APPARATUS FOR OPERATING BEAMFORMED REFERENCE SIGNAL IN COMMUNICATION SYSTEM

The present disclosure relates 5G or pre-5G communication systems for supporting higher data transmission rate than those by LTE or other post-4G communication systems. According to the present disclosure, a method for operating a beamformed reference signal by a base station and terminal in a communication system, and the terminal, are provided. The method includes transmitting, to a terminal, control information indicating whether a first codebook is used for generating feedback information on a downlink reference signal. The first codebook is used if generating feedback information on the beamformed reference signal and is generated based on a number of antenna ports and a number of ranks. 1. A method for operating a beamformed reference signal by a base station in a communication system , the method comprising:transmitting, to a terminal, control information indicating whether a first codebook is used for generating feedback information on a downlink reference signal,wherein the first codebook is used if generating feedback information on the beamformed reference signal and is generated based on a number of antenna ports and a number of ranks.2. The method of claim 1 , further comprising:determining, if the control information indicates that the first codebook is used for generating the feedback information, first beamforming information;applying the first beamforming information to a downlink reference signal, and transmitting the first beamforming information-applied reference signal to the terminal;receiving, from the terminal, feedback information on the first beamforming information-applied reference signal generated based on the first codebook; anddetermining second beamforming information based on the received feedback information; andapplying the second beamforming information to downlink data, and transmitting second beamforming information-applied data to the terminal3. The method of claim 1 , further comprising:receiving, from the terminal, if the ...

Method and apparatus for controlling uplink power in wireless communication system

A method is provided for controlling an uplink (UL) power by a Mobile Station (MS) in a wireless communication system including an upper-layer Base Station (BS) and a lower-layer BS whose cell coverage is narrower than that of the upper-layer BS. The method also includes measuring a first received signal strength indicating a received signal strength of a first reference signal received from the upper-layer BS, and a second received signal strength indicating a received signal strength of a second reference signal received from the lower-layer BS, acquiring a transmission (TX) power ratio representative of a ratio of a first TX power indicating a TX power of the upper-layer BS to a second TX power indicating a TX power of the lower-layer BS, selecting a first serving BS indicating a UL serving BS to which the MS will transmit a UL signal, from among the upper-layer BS and the lower-layer BS, and determining a UL TX power, based on the first received signal strength, the second received signal strength, and the TX power ratio, and transmitting the UL signal to the first serving BS using the UL TX power.

METHOD AND APPARATUS FOR SELECTING CELL TO INCREASE TRANSMISSION CAPACITY IN WIRELESS COMMUNICATION SYSTEM

An apparatus is configured to perform a method for selecting a cell to increase transmission capacity in a wireless communication system. A Mobile Station (MS) can select a cell in a heterogeneous network system. The MS can receive a loading indicator for each of a plurality of Base Stations (BS); measure signal strength information for each of the BSs; and select one of the BSs using the loading indicator and the signal strength information. Therefore, the transmission efficiency of the system can be increased. 1. A method of a Mobile Station (MS) for selecting a cell in a heterogeneous network system , comprising:receiving a loading indicator for each of a plurality of Base Stations (BS);measuring signal strength information for each of the BSs; andselecting one of the BSs using the loading indicator and the signal strength information.2. The method of claim 1 , wherein the loading indicator comprises at least one of: a loading rate claim 1 , a loadable rate claim 1 , a cell weight claim 1 , a loadable bandwidth claim 1 , an effective bandwidth claim 1 , and an expected capacity claim 1 , andthe signal strength information is a value indicating channel state between the MS and a corresponding BS.3. The method of claim 1 , wherein the selecting of one of the BSs using the loading indicator and the signal strength information comprises:comparing the signal strength information of each of the BSs and a preset threshold; andexcluding a BS having the signal strength information smaller than the preset threshold, among the BSs, from cell selection.4. The method of claim 1 , wherein the selecting of one of the BSs using the loading indicator and the signal strength information comprises:determining an expected capacity for each of the BSs using the loading indicator and the signal strength information; andselecting a BS having the greatest expected capacity among the BSs.5. The method of claim 1 , wherein the selecting claim 1 , of one of the BSs using the loading ...

METHOD AND APPARATUS FOR UPLINK POWER CONTROL USING RANGING SIGNAL IN WIRELESS COMMUNICATION SYSTEM

A method and an apparatus for uplink power control using a ranging signal in a wireless communication system are provided. The method includes transmitting ranging channel information to a pico Base Station (BS), receiving power control information on a macro terminal from the pico BS, controlling a transmit power strength for the macro terminal based on the power control information, and instructing the macro terminal to control a transmit power to the controlled strength. 1. A method of uplink power control for a terminal in a macro Base Station (BS) of a wireless communication system , the method comprising:transmitting ranging channel information to a pico BS;receiving power control information on a macro terminal from the pico BS;based on the power control information, controlling a transmit power strength for the macro terminal; andinstructing the macro terminal to control a transmit power to the controlled strength.2. The method of claim 1 , wherein the ranging channel information comprises a ranging preamble code.3. The method of claim 1 , wherein the power control information comprises a ranging preamble code for the macro terminal and a receive power strength of a ranging signal that the pico BS receives from the macro terminal4. The method of claim 1 , wherein the power control information comprises a ranging preamble code for the macro terminal.5. The method of claim 1 , wherein the controlling of the transmit power is determined through the following Equation:{'br': None, 'sub': Target', 'pico, 'P(dBm)=L+SINR+NI+Offset−g(Δpower),'}{'sub': Target', 'pico, 'wherein P is uplink transmit power, L is path Loss value, NI is Noise and Interference, SINRis target received Signal to Interference and Noise Ratio (SINR), and g(Δpower) is a function reflecting receive power of a ranging signal of the macro terminal in the pico BS.'}6. A method of uplink power control for a terminal in a pico Base Station (BS) of a wireless communication system claim 1 , the method ...

Method and apparatus for supporting high-speed mobile terminals in a distributed antenna system

A method and apparatus for supporting a high-speed mobile terminal in a distributed antenna system. The method includes acquiring information on a position and a speed of each terminal of a plurality of terminals, mapping the plurality of terminals to at least one or more terminal groups based on at least one or more of the position or the speed of the terminal, determining a service end time point at a serving antenna node and a service start time point at a target antenna node, using position and speed information associated with the terminal group, and switching an antenna node for the terminal group, according to the service end time point at the serving antenna node and the service start time point at the target antenna node.

METHOD AND APPARATUS FOR SUPPORTING HANDOVER IN HETEROGENEOUS NETWORK

A method for operating a terminal for supporting a handover in a heterogeneous network is provided. The method includes measuring received signal strength from a target small base station, so that a Signal-to-Noise Ratio (SNR) is estimated, when the SNR of the target small base station that considers a biased value for range expansion is greater than an SNR of a serving macro base station, determining whether an SNR of the target small base station that does not consider the biased value for the range expansion is equal to or less than a threshold, and when the SNR of the target small base station that does not consider the biased value for the range expansion is equal to or less than the threshold, transmitting indication information, informing that a low SNR is expected when the terminal performs a handover to the target small base station, to the serving macro base station. 1. A method for operating a terminal for supporting a handover in a heterogeneous network , the method comprising:measuring received signal strength from a target small base station to estimate a Signal-to-Noise Ratio (SNR);when the SNR of the target small base station that considers a biased value for range expansion is greater than an SNR of a serving macro base station, determining whether an SNR of the target small base station that does not consider the biased value for the range expansion is equal to or less than a threshold; andwhen the SNR of the target small base station that does not consider the biased value for the range expansion is equal to or less than the threshold, transmitting indication information, informing that a low SNR is expected when the terminal performs a handover to the target small base station, to the serving macro base station.2. The method of claim 1 , further comprising claim 1 , when the SNR of the target small base station that does not consider the biased value for the range expansion is greater than the threshold claim 1 , performing a handover to the ...

METHOD AND APPARATUS FOR SUPPORTING MOBILE STATION DISCONNECTED FROM A BASE STATION IN WIRELESS COMMUNICATION SYSTEM

A method and apparatus support a Mobile Station (MS) located in a collapsed cell area to be disconnected from a Base Station (BS) in a wireless communication system. A method of an MS for supporting an disconnected MS disconnected from a BS in a wireless communication system includes receiving a rescue signal from the disconnected MS; collecting information to determine a support MS for the disconnected MS; and transmitting the collected information to a serving BS. 1. A method of operating a Mobile Station (MS) for supporting an MS disconnected from a Base Station (BS) in a wireless communication system , the method comprising:receiving a rescue signal from the disconnected MS;collecting information to determine a support MS for the disconnected MS; andtransmitting the collected information to a serving BS.2. The method of claim 1 , wherein the information to determine a support MS for the disconnected MS includes at least one of information about a residual power of the support MS claim 1 , information about reception/non-reception of a rescue signal claim 1 , information about a number of received rescue signals claim 1 , information about a strength of a received rescue signal claim 1 , and information about a location of the support MS.3. The method of further comprising:receiving an allocation of a preamble from the BS;transmitting the allocated preamble periodically;determining whether there is a disconnected MS attempting a connection to the support MS; andwhen there is a disconnected MS attempting a connection to the support MS, establishing a communication link with the connection-attempting MS.4. The method of further comprising:when there is an MS attempting a connection to the support MS, transmitting a support approval request for the connection-attempting MS to the BS; andreceiving a support approval for the connection-attempting MS from the BS.5. A method of operating a Base Station (BS) for supporting a Mobile Station (MS) disconnected from a BS in ...

METHOD AND APPARATUS FOR ALLOCATING RANGING CODES IN COMMUNICATION SYSTEM

A method of allocating ranging codes by a macro base station in a communication system is provided. The method includes broadcasting information related to adjacent femto base stations, receiving a ranging request including class information indicating a degree of a strength of interference of an adjacent macro base station from a terminal, and allocating one of ranging codes included in a code subset dedicated to a corresponding class to the terminal, the ranging codes being allocatable to only terminals in a class indicated by the class information. 1. A method of allocating ranging codes by a macro base station in a communication system , the method comprising:broadcasting information related to adjacent femto base stations;receiving a ranging request including class information indicating a degree of a strength of interference of an adjacent macro base station from a terminal; andallocating one of ranging codes included in a code subset dedicated to a corresponding class to the terminal, the ranging codes being allocatable to only terminals in a class indicated by the class information.2. The method as claimed in claim 1 , wherein the class information comprises an indicator indicating one of a first class representing that the strength of the interference of the adjacent macro base station of the terminal is low claim 1 , and a second class representing that the strength of the interference of the adjacent macro base station of the terminal is high.3. The method as claimed in claim 2 , further comprising allocating one of ranging codes allocatable to only terminals in the second class and included in a second class dedicated code subset to the terminal when the class information comprises the indicator indicating the second class claim 2 ,wherein the second class dedicated code subset is a part of ranging codes allocatable in the adjacent femto base stations located in a service region of the macro base station.4. The method as claimed in claim 3 , wherein the ...

METHOD AND APPARATUS FOR OBTAINING SYNCHRONIZATION FOR COMMUNICATION BETWEEN DEVICES

A method and an apparatus for obtaining synchronization of a terminal for communication between devices when a base station collapses are provided. The method includes, when a preamble signal is not received from the base station, maintaining a first synchronization for a predetermined time using a timer, transmitting a first preamble signal at a first synchronization point, performing a synchronization procedure with at least one neighbor terminal based on the first preamble signal, and, after the synchronization procedure, performing communication with the at least one neighbor terminal. In addition, when a preamble signal is not received from a base station, a first preamble signal from a relevant neighbor terminal is monitored for a predetermined time. When the first preamble signal is not received from the relevant neighbor terminal for the predetermined time, a second preamble signal is transmitted at an arbitrary point. 1. A method for obtaining synchronization of a terminal for communication between devices when a base station collapses , the method comprising:when not receiving a preamble signal from the base station, maintaining, at the terminal, a first synchronization for a predetermined time using a timer;transmitting, at the terminal, a first preamble signal at a first synchronization point;performing, at the terminal, a synchronization procedure with at least one neighbor terminal based on the first preamble signal; andafter the synchronization procedure, performing communication with the at least one neighbor terminal.2. The method of claim 1 , wherein the first preamble signal implicitly indicates that the base station has collapsed and is transmitted at the same point as a transmission point of the preamble signal by the base station.3. The method of claim 1 , further comprising claim 1 , after the performing of the synchronization procedure with the at least one neighbor terminal using the first preamble signal:monitoring the preamble signal ...

METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING INFORMATION FOR RANDOM ACCESS IN WIRELESS COMMUNICATION SYSTEM

A method and a Base Station (BS) of transmitting information for Random Access (RA) by a base station in a wireless communication system are provided. The BS generates RA information for beam alignment between the base station and each of a plurality of mobile terminals based on a number of reception beam forming patterns of the base station used for each of one or more RA channels and broadcasts the RA information to the plurality of mobile terminals. The RA information comprises information related to the number of reception beam forming patterns of the base station used for each of the one or more RA channels. 1. A method of transmitting information for Random Access (RA) by a base station in a wireless communication system , the method comprising:generating RA information for beam alignment between the base station and each of a plurality of mobile terminals based on a number of reception beam forming patterns of the base station used for each of one or more RA channels; andbroadcasting the RA information to the plurality of mobile terminals,wherein the RA information comprises information related to the number of reception beam forming patterns of the base station used for each of the one or more RA channels.2. The method as claimed in claim 1 , wherein the information related to the number of reception beam forming patterns of the base station comprises at least one of information directly indicating the number of reception beam forming patterns of the base station and index information corresponding to the number of reception beam forming patterns of the base station.3. The method as claimed in claim 2 , wherein if the information related to the number of reception beam forming patterns of the base station comprises the information directly indicating the number of reception beam forming patterns of the base station claim 2 , the RA information further comprises at least one of information on a number of times the base station uses an identical reception beam ...

APPARATUS AND METHOD FOR SCHEDULING USING BEAM SCANNING IN BEAMFORMED WIRELESS COMMUNICATION SYSTEM

An apparatus and a method for beam selection and inter-beam scheduling using beam scanning in a beamformed wireless communication system are provided. A method for transmitting a signal in a transmitting stage includes transmitting a reference signal through at least one transmission beam, receiving channel information of at least one transmission beam from a receiving stage, selecting a first transmission beam for sending a signal to the receiving stage, by considering the channel information of the at least one transmission beam provided from the receiving stage, and performing inter-beam scheduling for the receiving stage by considering ID information of the first transmission beam. 1. A method for transmitting a signal in a transmitting stage of a wireless communication system which forms a plurality of beams , the method comprising:transmitting a reference signal through at least one transmission beam;receiving channel information of at least one transmission beam from a receiving stage;selecting a first transmission beam for sending a signal to the receiving stage, by considering the channel information of the at least one transmission beam provided from the receiving stage; andperforming inter-beam scheduling for the receiving stage by considering ID information of the first transmission beam.2. The method of claim 1 , wherein the reference signal comprises at least one of cell ID information claim 1 , sector ID information claim 1 , beam ID information claim 1 , and beam load information.3. The method of claim 1 , wherein the selecting of the first transmission beam comprises:selecting the first transmission beam by considering the channel information of the at least one transmission beam provided from the receiving stage, and load information of each transmission beam.4. The method of claim 1 , wherein the selecting of the first transmission beam comprises:when the receiving stage supports reception beamforming, selecting the first transmission beam by ...

METHOD AND APPARATUS FOR BEAM ALLOCATION IN WIRELESS COMMUNICATION SYSTEM

A beam allocation method of a Base Station (BS) in a wireless communication system is provided. The method includes transmitting a reference signal to a Mobile Station (MS) using a plurality of downlink transmit (Tx) beams, receiving information of a plurality of candidate downlink Tx beams determined by the MS in response to the received reference signal, selecting at least one downlink Tx beam from the plurality of candidate downlink Tx beams according to a predefined rule, generating control information for burst transmission, comprising the selected at least one downlink Tx beam information, transmitting the control information to the MS using the selected at least one downlink Tx beam, and transmitting a data burst based on Tx beam information included in the control information. 1. A beam allocation method of a Base Station (BS) in a wireless communication system , the method comprising:transmitting a reference signal to a Mobile Station (MS) using a plurality of downlink transmit (Tx) beams;receiving information of a plurality of candidate downlink Tx beams determined by the MS in response to the reception of the reference signal;selecting at least one downlink Tx beam from the plurality of candidate downlink Tx beams according to a predefined rule;generating control information for burst transmission, comprising information for the selected at least one downlink Tx beam;transmitting the control information to the MS using the selected at least one downlink Tx beam; andtransmitting a data burst based on Tx beam information included in the control information.2. The beam allocation method of claim 1 , wherein the predefined rule is notified to the MS in advance.3. The beam allocation method of claim 2 , wherein the predefined rule is notified to the MS over a broadcasting channel in advance.4. The beam allocation method of claim 2 , wherein the predefined rule is used to select the at least one downlink Tx beam from the plurality of candidate downlink Tx beams ...

APPARATUS AND METHOD FOR BEAM SELECTING IN BEAMFORMED WIRELESS COMMUNICATION SYSTEM

An apparatus and a method for reducing delay during beam alignment in a beamformed wireless communication system are provided. A method for selecting a beam pattern in a Base Station (BS) includes determining whether a direction finding signal is received through each time interval of a direction finding channel, transmitting information of whether the direction finding signal is received with respect to each time interval of the direction finding channel, changing a receive beam pattern and receiving a random access signal from a Mobile Station (MS) with at least one transmit beam pattern over a random access channel, and selecting one of transmit beam patterns of the MS and one of receive beam patterns of the BS according to the random access signal. 1. A method for selecting a beam pattern in a Base Station (BS) of a wireless communication system which generates a plurality of beam patterns , the method comprising:determining whether a direction finding signal is received through each interval of a direction finding channel;transmitting information of whether the direction finding signal is received with respect to each interval of the direction finding channel;changing a receive beam pattern and receiving a random access signal from a Mobile Station (MS) with at least one transmit beam pattern over a random access channel; andselecting one of transmit beam patterns of the MS and one of receive beam patterns of the BS according to the random access signal.2. The method of claim 1 , further comprising:before determining whether the direction finding signal is received, transmitting resource allocation information of the direction finding channel and resource allocation information of the random access channel.3. The method of claim 1 , wherein the determining of whether the direction finding signal is received comprises:determining whether the direction finding signal is received in each interval, according to a receive power of each interval of the direction ...

APPARATUS AND METHOD FOR OPERATING MULTIPLE BEAMFORMING TRANSCEIVER IN WIRELESS COMMUNICATION SYSTEM

A method for operating a base station in a wireless communication system in order to support a plurality of propagation characteristics is provided. The method includes allocating resource periods for respective propagation characteristics, transmitting system information including information on the propagation characteristics, transmitting a reference signal with the propagation characteristic corresponding to the relevant resource period through at least one of the resource periods, and receiving feedback information determining channel qualities for all of the propagation characteristics. 1. A method for operating a base station in a wireless communication system , the method comprising:allocating resource periods for respective propagation characteristics;transmitting system information including information on the propagation characteristics;transmitting a reference signal with the propagation characteristic corresponding to the relevant resource period through at least one of the resource periods; andreceiving feedback information determining channel qualities for at least one of the propagation characteristics.2. The method of claim 1 , wherein the system information includes at least one of information indicating the propagation characteristics to be operated claim 1 , allocation information of the resource periods claim 1 , information indicating a number of times of transmitting the reference signal claim 1 , a transmission (TX) power value for each propagation characteristic claim 1 , a maximum TX antenna gain for each propagation characteristic claim 1 , information indicating a beam direction claim 1 , and related information for determination of at least one of the listed items.3. The method of claim 1 , wherein the feedback information includes at least one of a Channel Quality Indicator (CQI) for each of the propagation characteristics claim 1 , a path loss for each propagation characteristic claim 1 , a preferred propagation characteristic claim 1 ...

APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING SIGNAL IN A NEAR FIELD COMMUNICATION SYSTEM

A method and apparatus for transmitting and receiving a signal in a Near Field Communication (NFC) system are provided, in which a multi-frame is configured and a signal is transmitted in the multi-frame to a reception terminal The multi-frame includes a discovery region, a paging region, at least two scheduling regions for indicating a plurality of different scheduling algorithms, and a traffic slot region. A transmission terminal transmits a signal for searching for a neighbor terminal in the discovery region, transmits a paging signal in the paging region, transmits information for a scheduling algorithm that is predetermined by the transmission terminal and the reception terminal in each of the scheduling regions, and transmits a scheduled signal in the traffic slot region according to the predetermined scheduling algorithm. 1. A signal transmission method of a transmission terminal in a Near Field Communication (NFC) system , the method comprising:configuring a multi-frame; andtransmitting a signal in the multi-frame to a reception terminal,wherein the multi-frame includes a discovery region, a paging region, at least two scheduling regions for indicating a plurality of different scheduling algorithms, and a traffic slot region, andwherein the transmission terminal transmits a signal for searching for a neighbor terminal in the discovery region, transmits a paging signal in the paging region, transmits information for a scheduling algorithm that is predetermined by the transmission terminal and the reception terminal in each of the scheduling regions, and transmits a scheduled signal in the traffic slot region according to the predetermined scheduling algorithm.2. The signal transmission method of claim 1 , wherein the information for the predetermined scheduling algorithm is a delta value Δ representing a quantization level of the information for the scheduling algorithm indicating the predetermined scheduling algorithm claim 1 ,wherein the delta value Δ is ...

BEAMFORMING METHOD AND APPARATUS FOR ACQUIRING TRANSMISSION BEAM DIVERSITY IN A WIRELESS COMMUNICATION SYSTEM

A data transmission method for a base station to acquire transmission beam diversity in a wireless communication system is provided. The data transmission method includes selecting at least two transmission beams to be used for data transmission from among multiple transmission beams corresponding to transmission beam information, if receiving the transmission beam information regarding the multiple transmission beams from a terminal, and transmitting data encoded with a predetermined orthogonalization code to the terminal via the selected at least two transmission beams. 1. A data transmission method for a base station to acquire transmission beam diversity in a wireless communication system , the data transmission method comprising:receiving transmission beam information regarding multiple transmission beams from a terminal;selecting at least two transmission beams to be used for data transmission from among the multiple transmission beams corresponding to the transmission beam information; andtransmitting data to the terminal by using diversity transmission scheme via the selected at least two transmission beams.2. The data transmission method of claim 1 , further comprising:sending a request for the transmission beam information regarding the multiple transmission beams to the terminal;sending a request for channel quality information predicted in the data transmission for the selected at least two transmission beams to the terminal; andreceiving the channel quality information from the terminal.3. The data transmission method of claim 1 , further comprising:sending a request for the transmission beam information regarding the multiple transmission beams and channel quality information predicted in the data transmission to the terminal;receiving the channel quality information from the terminal; andtransmitting the data to the terminal via the multiple transmission beams corresponding to the transmission beam information.4. The data transmission method of claim ...

METHOD AND APPARATUS FOR OPERATING CONTROL CHANNELS FOR BEAMFORMING-BASED WIRELESS COMMUNICATION

Provided is a method and apparatus for operating a control channel in a beamforming-based wireless communication system. The provided method includes acquiring information indicating a best Base Station (BS) receive beam for Uplink (UL) communication; determining a control channel region for UL control channels in a UL interval considering the best BS receive beam, the control channel region being a predetermined region that is mapped to the best BS receive beam; and exchanging information about the control channel between a BS and a Mobile Station (MS) through the control channel region. 1. A method for operating a control channel in a beamforming-based wireless communication system , comprising:acquiring information indicating a best Base Station (BS) receive beam for Uplink (UL) communication;determining a control channel region for UL control channels in a UL interval considering the best BS receive beam, the control channel region comprising a predetermined region that is mapped to the best BS receive beam; andexchanging information about the control channel between a BS and a Mobile Station (MS) through the control channel region.2. The method of claim 1 , wherein the UL interval includes a control channel resource area for transmitting a UL control channel claim 1 , and the control channel resource area is divided claim 1 , in a time domain claim 1 , into multiple control channel regions corresponding to multiple BS receive beams.3. The method of claim 2 , wherein the control channel regions are allocated to multiple MSs having the same BS receive beam as a best BS receive beam.4. The method of claim 1 , wherein in the UL interval claim 1 , the control channel regions are multiplexed with a resource area for other channels in a time or frequency domain.5. The method of claim 1 , further comprising:transmitting a Downlink (DL) data burst from the BS to the MS;determining, by the MS, a UL feedback resource area corresponding to the DL data burst and a UL ...

METHOD AND APPARATUS FOR TRANSMITTING BEAM INFORMATION IN WIRELESS COMMUNICATION SYSTEM

A method and a mobile station of transmitting beam information by a mobile station in a wireless communication system are provided. The mobile station determines whether a particular a particular event according to communication with a base station has occurred, and transmits information on at least one DownLink (DL) transmission beam among N number of DL transmission beams to the base station using a contention-based feedback channel according to a result of the determination. 1. A method of transmitting beam information by a mobile station in a wireless communication system , the method comprising:determining whether a particular event according to communication with a base station has occurred; andtransmitting information on at least one DownLink (DL) transmission beam among N number of DL transmission beams to the base station using a contention-based feedback channel according to a result of the determination.2. The method of claim 1 , wherein the determining of whether the particular event has occurred comprises:determining whether information on at least one UpLink (UL) transmission beam among M number of UL transmission beams is received from the base station within a preset time period.3. The method of claim 2 , wherein the transmitting of the information to the base station comprises:if the information on the at least one UL transmission beam among the M number of UL transmission beams is not received from the base station within the preset time period, measuring an intensity of N number of DL reference signals transmitted using the N number of DL transmission beams;determining whether the N number of DL reference signals include at least one DL reference signal having an intensity larger than or equal to a threshold; andif the N number of DL reference signals include at least one DL reference signal having an intensity larger than or equal to the threshold, selecting at least one DL transmission beam corresponding to the at least one DL reference signal ...

METHOD AND APPARATUS FOR BEAMFORMING IN WIRELESS COMMUNICATION SYSTEM

A method and an apparatus for operating a transmitter in a millimeter wave communication system is provided. In the method, information of a common and/or control channel is mapped to a dedicated frequency region of a dedicated Radio Frequency (RF) path. Data is mapped to a common frequency region for a common RF path.

Scheme for performing beamforming in communication system

A method of performing beamforming in a base station is provided. The method includes receiving random access channel signals transmitted in one or more transmit beams from a terminal, using one or more receive beams, determining at least one best transmit beam from the one or more transmit beams and at least one best receive beam from the one or more receive beams, and transmitting information about the best transmit beam and the best receive beam to the terminal.

COORDINATED COMMUNICATION IN COMMUNICATION SYSTEM

A method of supporting communication of a terminal in a first base station of a beamforming system is provided. The method includes determining an uplink control channel through which both the first base station and at least one second base station are able to receive signals, through cooperation with the at least one second base station, the first base station and the at least one second base station belonging to a cloud cell, and transmitting to the terminal information on the determined uplink control channel and frame information to establish relationships with the base stations included in the cloud cell for each transmit frame of a signal to be transmitted to the terminal from the base stations. 1. A method of supporting communication of a terminal in a first base station of a beamforming system , the method comprising:determining an uplink control channel through which both the first base station and at least one second base station are able to receive signals, through cooperation with the at least one second base station, the first base station and the at least one second base station belonging to a cloud cell; andtransmitting to the terminal information on the determined uplink control channel and frame information to establish relationships with the base stations included in the cloud cell for each transmit frame of a signal to be transmitted to the terminal from the base stations.2. The method of claim 1 , further comprising:receiving information on a signal that the at least one second base station received from the terminal through the uplink control channel from the at least one second base station.3. The method of claim 2 , further comprising:transmitting a control transfer signal over the terminal to one of the at least one second base station that is configured to receive a best signal from the terminal, using the information on the received signal.4. The method of claim 2 , wherein the signal that the at least one second base station received from ...

Apparatus and method for operating resources in communication system

A method for operating resources by a base station in a communication system is provided. The method includes transmitting at least one beam to at least one terminal, receiving strength information of the at least one beam from the at least one terminal, determining at least one of resources which are not used for communication between the at least one terminal and the base station, and resources, whose interference to communication between the base station and the at least one terminal is less than or equal to a predetermined threshold, based on the strength information of the at least one beam, and allocating the determined resources as resources for communication which is performed between terminals without the base station.

METHOD AND APPARATUS FOR BEAMFORMING

A method and an apparatus using beamforming in a wireless communication system are provided. The communication method includes detecting generation of uplink data to be transmitted from a Mobile Station (MS) to a Base Station (BS), and transmitting a scheduling request signal requesting uplink resource allocation in at least one channel region corresponding to uplink transmission and reception beams in an uplink resource area allocated to a scheduling request channel. 1. A method using beamforming in a wireless communication system , the communication method comprising:generating of uplink data to be transmitted from a Mobile Station (MS) to a Base Station (BS); andtransmitting a scheduling request signal requesting uplink resource allocation in at least one channel region corresponding to uplink transmission and reception beams in an uplink resource area allocated to a scheduling request channel.2. The method of claim 1 , wherein the transmission of the scheduling request signal comprises repeatedly transmitting the scheduling request signal in all channel regions corresponding to all uplink transmission beams in the uplink resource area allocated to the scheduling request channel.3. The method of claim 1 , wherein the MS does not have information about an uplink best transmission and/or reception beam.4. The method of claim 1 , wherein transmitting the scheduling request signal comprises transmitting the scheduling request signal by an uplink best transmission beam in at least one random transmission beam region in each of reception beam regions corresponding to uplink reception beams in the resource area.5. The method of claim 1 , wherein transmitting the scheduling request signal comprises transmitting the scheduling request signal by an uplink best transmission beam in at least one transmission beam region at the same resource position in each of reception beam regions corresponding to uplink reception beams in the resource area.6. The method of claim 1 , ...

APPARATUS AND METHOD FOR RANDOM ACCESS IN WIRELESS COMMUNICATION SYSTEM USING BEAMFORMING

An apparatus implements methods for random access in a wireless communication system using beamforming. A Subscriber Station (SS) measures a best downlink transmission beam among downlink transmission beams transmitted from a Base Station (BS), and transmits Random Access Channel (RACH) information, which includes indication information indicating the best downlink transmission beam, to the BS. The BS receives RACH information which includes indication information indicating a best downlink transmission beam among downlink transmission beams, and detects an RACH sequence and the best downlink transmission beam from the received RACH information. 1. A method to be implemented by a Subscriber Station (SS) in a wireless communication system using beamforming , the method comprising:measuring a best downlink transmission beam among downlink transmission beams transmitted from a Base Station (BS); andtransmitting Random Access Channel (RACH) information, which comprises indication information indicating the best downlink transmission beam, to the BS.2. The method of claim 1 , wherein transmitting the RACH information to the BS comprises:selecting a specific group of RACH sequences among a plurality of RACH sequences, and determining one RACH sequence within the specific group of RACH sequences; andtransmitting to the BS the determined RACH sequence as the RACH information.3. The method of claim 2 , wherein determining the RACH sequence comprises:randomly selecting the specific group of RACH sequences among the plurality of RACH sequences; andsearching a sequence mapped to the indication information within the specific group of RACH sequences and determining the searched sequence as the one RACH sequence.4. The method of claim 2 , wherein determining the RACH sequence comprises:selecting the specific group of RACH sequences mapped to the indication information among the plurality of RACH sequences; andrandomly selecting a sequence within the specific group of RACH ...

APPARATUS AND METHOD FOR CONFIGURING WIRELESS BACK HAUL LINK IN WIRELESS COMMUNICATION SYSTEM

Provided is a method for configuring a wireless backhaul link by a Mobile Station (MS) in a wireless communication system. The method includes acquiring System Information (SI) for each of an old Base Station (BS) which transmits a first code and a new BS which transmits a second code. The method includes transmitting a message which reports the SI for the new BS to the old BS. The method includes receiving a message indicating that the new BS discards the second code and uses the first code from the old BS, wherein the first code is a code indicating that a related BS is a BS which has been already deployed, and wherein the second code is a code indicating that a related BS is a BS which is newly deployed. 1. A method for configuring a wireless backhaul link by a Mobile Station (MS) in a wireless communication system , the method comprising:acquiring System Information (SI) for each of an old Base Station (BS) which transmits a first code and a new BS which transmits a second code;transmitting a message which reports the SI for the new BS to the old BS; andreceiving a message indicating that the new BS discards the second code and uses the first code from the old BS,wherein the first code is a code indicating that a related BS is a BS which has been already deployed, andwherein the second code is a code indicating that a related BS is a BS which is newly deployed.2. The method of claim 1 , further comprising:after transmitting the message which reports the SI for the new BS to the old BS, receiving from the old BS a message which requests the MS to transmit a third code to the new BS; andtransmitting the third code to the new BS,wherein the third code is a code commanding the old BS to start performing a Front-Haul Link Configuration Procedure (FLCP) with the new BS.3. The method of claim 1 , further comprising:detecting the first code from the old BS and the second code from the new BS by performing a scan operation for neighbor BSs of the MS.4. The method of ...

METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING BROADCAST CHANNEL IN CELLULAR COMMUNICATION SYSTEM

Provided is a method and apparatus for transmitting and receiving a Broadcast Channel (BCH) in a cellular communication system. The method for transmitting a BCH in a cellular communication system includes repeating symbols comprising information about the BCH, code-covering the repeated symbols with codes selected from a previously given code set, subcarrier-mapping the code-covered symbols, and transmitting the subcarrier-mapped symbols in one frame by using different beams corresponding to the selected codes. The codes are selected based on a number of repetitions, a cell identifier, and a beam index. 1. A method for transmitting a Broadcast Channel (BCH) in a cellular communication system , the method comprising:repeating symbols comprising information about the BCH;code-covering the repeated symbols with codes selected from a previously given code set;subcarrier-mapping the code-covered symbols; andtransmitting the subcarrier-mapped symbols in one frame by using different beams corresponding to the selected codes.2. The method of claim 1 , wherein the codes are selected from the code set according to a predefined rule based on a number of repetitions of the symbols claim 1 , a cell identifier of a cell in which the BCH is transmitted claim 1 , and a beam index used in transmission of the BCH.3. The method of claim 1 , wherein the subcarrier-mapped symbols are transmitted in a plurality of regions that are separated at equal intervals in the one frame by using different beams for the plurality of regions.4. The method of claim 1 , wherein the subcarrier-mapped symbols are transmitted in a plurality of consecutive regions of a forepart of the one frame by using different beams for the plurality of consecutive regions.5. The method of claim 1 , wherein the respective codes are selected by a code index calculated using:{'br': None, 'i': c', 'w', 'R,, 'Code =(IDcell+)mod'}wherein c indicates the code index, IDcell indicates a cell index of a cell in which the BCH is ...

APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING FEEDBACK INFORMATION IN A WIRELESS COMMUNICATION SYSTEM USING BEAMFORMING

An apparatus performs a method for generating information indicating channel quality when a dynamic range of a receive signal strength and an interference signal strength is considerable in a wireless communication system using beamforming. A base station (BS) for processing feedback information for scheduling receives from a mobile station (MS) first feedback information comprising a receive signal strength measurement result in paths selected from a plurality of downlink paths between the BSs and the MS, designates a transmit (TX) resource for interference measurement of the MS based on the first feedback information, receives from the MS second feedback information comprising an interference measurement result in the designated TX resource region, and calculates a Signal to Interference plus Noise Ratio (SINR) of the MS based on the first feedback information and the second feedback information. The designated TX resource includes a resource other than a signal TX resource for the MS. 1. A method of a first Base Station (BS) of BSs for processing feedback information for scheduling in a wireless communication system that uses beamforming and comprises the BSs and a Mobile Station (MS) in coordinated communication , the method comprising:receiving from the MS first feedback information comprising a receive signal strength measurement result in paths selected from a plurality of downlink paths between the BSs and the MS;designating a transmit (TX) resource for interference measurement of the MS based on the first feedback information;receiving from the MS second feedback information comprising an interference measurement result in the designated TX resource region; andcalculating a Signal to Interference plus Noise Ratio (SINR) of the MS based on the first feedback information and the second feedback information,wherein the designated TX resource comprises a resource other than a signal TX resource for the MS.2. The method of claim 1 , further comprising:generating ...

METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA IN A COMMUNICATION SYSTEM USING BEAMFORMING

A method and apparatus for transmitting and receiving data in a communication system using beamforming are provided. The transmission method includes transmitting a control channel signal in a control channel region of a subframe using a first transmission beam of a base station. The transmission method also includes transmitting a data signal during a predetermined time period of a data region after the control channel region in the subframe using a second transmission beam determined based on the first transmission beam. The transmission method further includes transmitting a data signal in a remaining data region following the predetermined time period using a scheduled transmission beam. 1. A method for transmitting data in a communication system using beamforming , the method comprising:transmitting a control channel signal in a control channel region of a subframe using a first transmission beam of a base station;transmitting a data signal during a predetermined time period of a data region after the control channel region in the subframe using a second transmission beam determined based on the first transmission beam; andtransmitting a data signal in a remaining data region following the predetermined time period using a scheduled transmission beam.2. The method of claim 1 , wherein the second transmission beam is identical to the first transmission beam or adjacent to the first transmission beam.3. The method of claim 1 , wherein a length of the predetermined time period is determined based on information signaled by the base station.4. A method for receiving data in a communication system using beamforming claim 1 , the method comprising:receiving a control channel signal in a control channel region of a subframe using a first reception beam of a mobile station;receiving a data signal during a predetermined time period of a data region after the control channel region in the subframe using the first reception beam; andreceiving a data signal in a remaining ...

Apparatus and method for base station cooperative communication in wireless communication system

A Base Station (BS) cooperative communication method in a wireless communication system is provided. The BS cooperative communication method includes measuring signal quality of one or more neighboring BSs, comparing a number of downlink beams available for communication between a serving BS and a Mobile Station (MS) with a reference value, determining not to involve the one or more neighboring BSs in BS cooperative communication for the MS when the number of downlink beams is equal to or larger than the reference value, comparing signal measurements of the one or more neighboring BSs with a first threshold when the number of downlink beams is smaller than the reference value, and determining to involve one or more neighboring BSs having a signal measurement value larger than the first threshold in the BS cooperative communication for the MS.

APPARATUS AND METHOD FOR ADJUSTING RECEIVE BEAM GAIN IN A WIRELESS COMMUNICATION SYSTEM

The present disclosure is related to a 5generation (5G) or pre-5G communication system to provide higher data rates than a 4generation (4G) communication system such as long term evolution (LTE). A method for adjusting a receive beam gain by a user equipment (UE) in a wireless communication system is provided. The method includes estimating a received signal quality value based on a reference signal received from a base station (BS), transmitting information about the estimated received signal quality value to the BS, comparing the received signal quality value with a minimum received signal quality value required for successful reception of data from the BS, and adjusting a receive beam gain to be used for data reception by turning on/off a radio frequency (RF) chain formed for each of antennas included in the UE based on a result of the comparison. 1. A method for adjusting a receive beam gain by a user equipment (UE) in a wireless communication system , the method comprising:estimating a received signal quality value based on a reference signal received from a base station (BS);transmitting information related to the estimated received signal quality value to the BS;comparing the received signal quality value with a minimum received signal quality value required for successful reception of data; andadjusting the receive beam gain to be used for data reception by turning on/off a radio frequency (RF) chain formed for each antenna included in the UE based on a result of the comparison.2. The method of claim 1 , wherein the adjustment of the receive beam gain comprises claim 1 , if the received signal quality value is less than the minimum received signal quality value claim 1 , turning on at least one RF chain to increase the receive beam gain to be used for the data reception to above a receive beam gain used for reception of the reference signal.3. The method of claim 1 , wherein the adjustment of the receive beam gain comprises claim 1 , if the received signal ...

Method and Apparatus for Adjusting Beam Width in Wireless 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 long term evolution (LTE). 1. A method of adjusting a reception beam width of a terminal in a wireless communication system , the method comprising:receiving information on a battery threshold of a terminal from a base station;determining whether to use a reception beam width wider than a currently used reception beam width, by comparing a battery level of the terminal with the battery threshold;transmitting additional resource request information to the base station when it is determined that a wider reception beam width is used; andwhen an additional resource corresponding to the additional resource request information is allocated from the base station, blocking a power supply of at least one antenna reception circuit among multiple antenna reception circuits corresponding to multiple antenna elements in order to form at least one reception beam having the wider reception beam width.2. The method of claim 1 , wherein the additional resource request information includes a channel quality indicator (CQI) adjusted according to the additional resource based on the CQI in comparison with a signal-to-noise ratio (SNR) measured in the terminal.3. The method of claim 1 , wherein the additional resource request information includes at least one among an indicator which indicates that the terminal requests an additional resource claim 1 , an additional gain value claim 1 , and an amount of the additional resource.4. The method of claim 1 , further comprising:receiving allocation information corresponding to the additional resource from the base station,wherein the allocation information includes an additional gain value, modulation and coding scheme (MCS) index, and an amount of the additional resource.5. The method of claim 1 , wherein the determining whether to use the reception beam ...

METHOD AND APPARATUS FOR ALLOCATING INTERFERENCE CANCELLATION CODE FOR INTER-BASE STATION COORDINATED COMMUNICATION IN RADIO COMMUNICATION SYSTEM

The present disclosure provides a method for allocating a code for inter-Base Station (BS) coordinated communications in a radio communication system. The method includes grouping terminals, at least more than a predetermined number of whose transmit and receive beams indicated by the terminals' respective favorite beam configuration information correspond to each other, in a same group; and allocating unique codes to terminals in the same group and sending information regarding the allocated code to each of the terminals. 1. A method for allocating a code for inter-Base Station (BS) coordinated communications in a radio communication system , the method comprising:grouping terminals into a same group, wherein the terminals include at least more than a predetermined number of terminals, wherein the terminals transmit and receive beams which correspond to each other and are indicated by favorite beam configuration information of the terminals; andallocating unique codes to the terminals and sending information regarding the allocated code to each of the terminals.2. The method of claim 1 , further comprising:if allocation of a resource is requested for at least one terminal in the group, allocating the same resource to the BSs to serve the at least one terminal;sending a message including information regarding a selected Modulation and Coding Scheme (MCS) level set and a location of the same resource to the at least one terminal; andsending the at least one terminal a signal obtained by encoding the same resource with a unique code allocated to the at least one terminal.3. The method of claim 2 , wherein the selected MCS level set represents code rates repeated on a symbol-level on a frequency axis based on a length of the code allocated to the at least one terminal claim 2 , andwherein the information regarding the allocated code includes an index of the code and length information of the code.4. The method of claim 1 , wherein the favorite beam configuration ...

METHOD AND APPARATUS FOR CHANNEL-RELATED INFORMATION FEEDBACK IN A BEAMFORMING SYSTEM

The present disclosure relates to a pre-5-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4-Generation (4G) communication system such as Long Term Evolution (LTE). A method for channel-related information feedback in a beamforming system, performed by a transmitter is provided. The method includes determining whether a receiver is to feed back gain information about an effective channel established between the transmitter and the receiver using channel-related information between the transmitter and the receiver, notifying the receiver of a feedback mode indicating whether the gain information is to be fed back, upon receipt of feedback information configured based on the feedback mode from the receiver, reconfiguring the effective channel based on the feedback information, and transmitting a signal on the reconfigured effective channel. 1. A method for channel-related information feedback in a beamforming system , performed by a transmitter , the method comprising:determining whether a receiver is to feed back gain information about an effective channel established with the receiver using channel-related information between the transmitter and the receiver;notifying the receiver of a feedback mode indicating whether the gain information is to be fed back; andupon receipt of feedback information configured based on the feedback mode from the receiver, reconfiguring the effective channel based on the feedback information and transmitting a signal on the reconfigured effective channel.2. The method of claim 1 , wherein the channel-related information includes at least one of information about a number of antennas in the transmitter claim 1 , information about a beamwidth per antenna of the transmitter claim 1 , whether the receiver is a single user or multiple users claim 1 , and channel feedback information configured based on a reference signal transmitted to the receiver claim 1 , received from the receiver.3. The ...

METHOD AND APPARATUS FOR OBTAINING SYNCHRONIZATION FOR COMMUNICATION BETWEEN DEVICES

A method and an apparatus for obtaining synchronization of a terminal for communication between devices when a base station collapses are provided. The method includes, when a preamble signal is not received from the base station, maintaining a first synchronization for a predetermined time using a timer, transmitting a first preamble signal at a first synchronization point, performing a synchronization procedure with at least one neighbor terminal based on the first preamble signal, and, after the synchronization procedure, performing communication with the at least one neighbor terminal. In addition, when a preamble signal is not received from a base station, a first preamble signal from a relevant neighbor terminal is monitored for a predetermined time. When the first preamble signal is not received from the relevant neighbor terminal for the predetermined time, a second preamble signal is transmitted at an arbitrary point. 1. A method for operating a terminal , the method comprising:monitoring a synchronization signal from a base station;transmitting a first synchronization signal based on a synchronization with the base station; andperforming communication with a neighbor terminal which receives the first synchronization signal from the terminal.2. The method of claim 1 , wherein the first synchronization signal indicates that the terminal fails to receive the synchronization signal from the base station.3. The method of claim 1 , further comprising:monitoring the synchronization signal received from the base station;if the synchronization signal is received from the base station, performing synchronization based on the synchronization signal; andperforming communication with the base station.4. The method of claim 1 , wherein the first synchronization signal comprises a sequence which is different from sequences for the synchronization signal transmitted by the base station.5. The method of claim 1 , wherein the transmitting the first synchronization signal ...

METHOD AND APPARATUS FOR OPERATING BEAMFORMED REFERENCE SIGNAL IN COMMUNICATION SYSTEM

The present disclosure relates 5G or pre-5G communication systems for supporting higher data transmission rate than those by LTE or other post-4G communication systems. According to the present disclosure, a method for operating a beamformed reference signal by a base station and terminal in a communication system, and the terminal, are provided. The method includes transmitting, to a terminal, control information indicating whether a first codebook is used for generating feedback information on a downlink reference signal. The first codebook is used if generating feedback information on the beamformed reference signal and is generated based on a number of antenna ports and a number of ranks. 1. A method performed by a base station in a wireless communication system , the method comprising:transmitting, by the base station, to a terminal, control information including a field, the field indicating whether a first codebook is used for generating feedback information on a beamformed reference signal,wherein a second codebook is a legacy codebook for precoding and CSI reporting, andwherein the first codebook is an alternative to the second codebook and is generated based on at least one of a number of antenna ports or a number of ranks.2. The method of claim 1 , further comprising:receiving, from the terminal, feedback information on the beamformed reference signal generated based on the second codebook considered for generating the first codebook if the field indicates that the first codebook is not used for generating the feedback information.6. A method performed by a terminal in a wireless communication system claim 1 , the method comprising:receiving, by the terminal, from a base station, control information including a field, the field indicating whether a first codebook is used for generating feedback information on a beamformed reference signal,wherein a second codebook is a legacy codebook for precoding and CSI reporting, andwherein the first codebook is an ...

APPARATUS AND METHOD FOR ADJUSTING RECEIVE BEAM GAIN IN A WIRELESS COMMUNICATION SYSTEM

The present disclosure is related to a 5th generation (5G) or pre-5G communication system to provide higher data rates than a 4th generation (4G) communication system such as long term evolution (LTE).A method for adjusting a receive beam gain by a user equipment (UE) in a wireless communication system is provided. The method includes estimating a received signal quality value based on a reference signal received from a base station (BS), transmitting information about the estimated received signal quality value to the BS, comparing the received signal quality value with a minimum received signal quality value required for successful reception of data from the BS, and adjusting a receive beam gain to be used for data reception by turning on/off a radio frequency (RF) chain formed for each of antennas included in the UE based on a result of the comparison. 1. A method for a terminal in a wireless communication system , the method comprising:estimating a channel quality based on a reference signal received from a base station (BS);transmitting, to the BS, information on the estimated channel quality;receiving, via a first receive beam, from the BS, control information including information on modulation and coding scheme (MCS); andreceiving, via a second receive beam, from the BS, data based on the information on the MCS.2. The method of claim 1 , wherein the information on the MCS includes an MCS level obtained based on the information on the estimated signal quality and an MCS offset being a difference between a reference signal transmission power and a data transmission power of the BS.3. The method of claim 2 ,wherein the data is received based on a receive beam gain used for the data reception, andwherein a receive beam gain used for the data reception is adjusted based on the MCS level and the MCS offset.4. The method of claim 3 ,wherein the receive beam gain used for the data reception is adjusted based on a channel quality threshold required for the data ...

DEVICE AND METHOD FOR TRANSMITTING AND RECEIVING DISCOVERY SIGNAL OF BASE STATION IN MOBILE COMMUNICATION SYSTEM

A method by which a small base station (BS) transmits a discovery signal (DS) in a mobile communication system is provided. The method includes a macro BS to which a component carrier (CC) of a predetermined frequency band is allocated, and at least one small base station to which N number of CCs of a frequency band different from that of the CC allocated to the macro base station are allocated. The method comprises the steps of generating the DS corresponding to predetermined information and transmitting the generated DS through a discovery channel (DCH) configured as a transmission resource of the macro base station, wherein the predetermined information is one among information on at least one CC that the small base station uses, cell ID (CID) index information of the small base station, and a sleep base station index when the small base station is in a sleep mode. 1. A method for a second base station (BS) to transmit a discovery signal (DS) in a mobile communication system that includes a first BS , to which a component carrier (CC) of a predetermined frequency band is assigned , and at least one second BS to which N CCs are assigned , of which a frequency band is different from the CC assigned to the first BS , the method comprising:generating a DS corresponding to predetermined information; andtransmitting the generated DS through a discovery channel (DCH) that is formed of transmission resources of the first BS,wherein the predetermined information is one of at least one CC information used by the second BS, a cell ID (CID) configuration information index of the second BS, and a dormant BS index when the second BS is in a dormant mode.2. The method as claimed in claim 1 , wherein the generating of the DS comprises:generating the DS using a single predetermined code or a predetermined number of orthogonal codes having different values.3. The method of claim 2 ,wherein, when the predetermined information is the CC information and the DS is generated using a ...

DEVICE AND METHOD FOR TRANSMITTING AND RECEIVING DISCOVERY SIGNAL OF BASE STATION IN MOBILE COMMUNICATION SYSTEM

A method by which a small base station (BS) transmits a discovery signal (DS) in a mobile communication system is provided. The method includes a macro BS to which a component carrier (CC) of a predetermined frequency band is allocated, and at least one small base station to which N number of CCs of a frequency band different from that of the CC allocated to the macro base station are allocated. The method comprises the steps of generating the DS corresponding to predetermined information and transmitting the generated DS through a discovery channel (DCH) configured as a transmission resource of the macro base station, wherein the predetermined information is one among information on at least one CC that the small base station uses, cell ID (CID) index information of the small base station, and a sleep base station index when the small base station is in a sleep mode. 1. A method for communication by a secondary base station (BS) in a mobile communication system including a master BS and the secondary BS , the method comprising:identifying information related to at least one frequency band of the secondary BS; andtransmitting, to the master BS, a message including the identified information related to the at least one frequency band,wherein the information related to the identified at least one frequency band is delivered by the master BS to a terminal.2. The method of claim 1 ,wherein the message is generated by using a single predetermined code or a predetermined number of orthogonal codes having different values, andwherein the generated message is transmitted through a discovery channel (DCH), the DCH comprising transmission resources of the master BS.3. The method of claim 2 ,wherein, when the message is generated using the single predetermined code, the DCH includes N transmission areas that are mapped respectively to N carrier frequency values, andwherein the generated message is transmitted to the terminal through a transmission area that is mapped to a ...

OPERATING METHOD FOR FUNCTION OF IRIS RECOGNITION AND ELECTRONIC DEVICE SUPPORTING THE SAME

A method of operating an iris recognition function, and an electronic device thereof are provided. The electronic device includes a first camera device, a second camera device, and at least one processor operatively connected to the first camera device and the second camera device. The at least one processor is configured to, if an execution of an iris recognition function is requested, obtain a first image associated with a subject, based on the first camera device, and output information about a feature point of the obtained first image on a display, and if the information about the feature point satisfies a specified condition, obtain a second image associated with the subject based on the second camera device, and wherein a display location of the information about the feature point on the display is changed depending on a capture angle between the subject and the first camera device. 1. An electronic device comprising:a first camera device;a second camera device; andat least one processor operatively connected to the first camera device and the second camera device, if an execution of an iris recognition function is requested, obtain a first image associated with a subject, based on the first camera device, and', 'output information about a feature point of the obtained first image on a display, and', 'if the information about the feature point satisfies a specified condition, obtain a second image associated with the subject based on the second camera device, and, 'wherein the at least one processor is configured towherein a display location of the information about the feature point on the display is changed depending on a capture angle between the subject and the first camera device.2. The electronic device of claim 1 , wherein the at least one processor is further configured to:determine whether the subject is a human's face in the first image,if the subject is the human's face, extract a feature point of the human's face or extract a feature point of an ...

METHOD AND DEVICE FOR PERFORMING BEAM TRACKING THROUGH SHORT RANGE OBJECT DETECTION

A method of a terminal that forms beams and a device for performing beam tracking in a communication system that supports beamforming are provided. The method includes detecting, by the terminal, an object located at a periphery of the terminal and performing beam tracking through beams formed by the terminal, except for a beam that is formed in a direction in which the detected object is located. 1. A method for operating a terminal , the method comprising:detecting an object located at a periphery of the terminal; andperforming beam tracking through beams formed by the terminal, except for a beam that is formed in a direction in which the detected object is located.2. The method of claim 1 , wherein the object located at the periphery of the terminal is detected by at least one sensor provided in the terminal.3. The method of claim 2 , wherein the at least one sensor comprises at least one of a proximity sensor claim 2 , a pressure sensor claim 2 , a contact sensor claim 2 , a touch sensor claim 2 , a laser sensor claim 2 , a light detection sensor and a camera sensor.4. The method of claim 1 , wherein the detecting of the object comprises:detecting an existence of the object based on data input by at least one sensor provided in the terminal; anddetermining a beam direction related to a sensor, which detected the existence of the object, as the direction in which the detected object is located.5. The method of claim 1 , wherein the object located at the periphery of the terminal is detected through a signal received in the terminal.6. The method of claim 5 , wherein the received signal comprises at least one of an electric wave signal and an ultrasonic wave signal.7. The method of claim 1 , wherein the detecting of the object comprises:receiving a signal from a base station through a plurality of beams having different directionality;determining an intensity of the signal received through each of the plurality of beams; anddetermining a direction in which the ...

METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING REFERENCE SIGNAL THROUGH BEAM GROUPING IN WIRELESS COMMUNICATION SYSTEM

A method for transmitting a reference signal by a base station in a wireless communication system is provided. The method includes transmitting configuration information for a reference signal to a terminal, performing a scrambling operation which multiplies the reference signal by a sequence on the basis of a beam group identifier for each of at least two beam groups set on a single cell, and transmitting the reference signal, to which the scrambling operation has been performed on the basis of the configuration information, to the terminal. 1. A method of transmitting a reference signal in a wireless communication system by a base station (BS) , the method comprising:transmitting configuration information on a reference signal to a user equipment (UE);performing a scrambling operation of multiplying the reference signal and a sequence based on a beam group identifier of each of two or more beam groups configured in one cell; andtransmitting the reference signal having passed through the scrambling operation to the UE based on the configuration information.2. The method of claim 1 ,wherein beams, which do not generate interference therebetween within the two or more beam groups, are used for transmitting the reference signals, andwherein the reference signals transmitted using the beams are multiplexed and transmitted through a space division multiplexing (SDM) scheme.3. The method of claim 2 , wherein the configuration information includes at least one piece of information related to a number of antennas included in an antenna array claim 2 , information related to a number of beams included in a beam group claim 2 , information related to a number of beam groups set in one cell claim 2 , and information related to a location of time claim 2 , frequency claim 2 , or code resources used for transmitting the reference signals.4. The method of claim 1 , wherein a number of sequences used for the scrambling operation is determined by the number of beam groups set in ...

DEVICE AND METHOD FOR TRANSMITTING FEEDBACK INFORMATION IN WIRELESS COMMUNICATION SYSTEM

The present disclosure relates to a pre-5-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4-Generation (4G) communication system such as Long Term Evolution (LTE). A terminal in a wireless communication system according to an embodiment of the present invention comprises: a controller for determining a first size corresponding to a number of bits allocated for a first PMI (precoding matrix indicator) and a second size corresponding to a number of bits allocated for a second PMI; and a transmitting unit for transmitting feedback information, including the first PMI corresponding to the first size and the second PMI corresponding to the second size, to a base station. 1. A method for operating a terminal in a wireless communication system , the method comprising:determining a first size corresponding to a number of bits assigned for a first precoding matrix indicator (PMI) and a second size corresponding to a number of bits assigned for a second PMI; andtransmitting, to a base station, feedback information comprising the first PMI corresponding to the first size and the second PMI corresponding to the second size.2. The method of claim 1 , further comprising:receiving information indicating the first size and the second size that are determined by the base station.3. The method of claim 1 , further comprising:transmitting information indicating at least one of PMI blocks, wherein the PMI blocks are different subsets of PMIs.4. The method of claim 1 , further comprising:receiving information indicating at least one of PMI blocks, wherein the PMI blocks are different subsets of PMIs.513-. (canceled)14. An apparatus for a terminal in a wireless communication system claim 1 , the apparatus comprising:at least one transceiver; and determine a first size corresponding to a number of bits assigned for a first precoding matrix indicator (PMI) and a second size corresponding to a number of bits assigned for a second PMI; and', ...

METHOD AND APPARATUS FOR OPERATING MULTIPLE MODULATION SCHEMES IN WIRELESS COMMUNICATION SYSTEM

The present invention relates to a method for operating, by a base station, multiple modulation schemes in a wireless communication system, the method comprising the steps of: calculating the number of terminals, among the terminals in a cell managed by the base station, of which a channel state is included in a state that is lower than a preset state; reporting information related to the calculated number of terminals to an upstream entity of the base station; receiving information about a band, assigned by the upstream entity, for a hybrid frequency shift keying (FSK) and quadrature amplitude modulation (QAM) (FQAM) scheme on the basis of a QAM scheme and a FSK scheme; and transmitting downwardly the information about the band for the FQAM scheme to the terminals of which a channel state is included in a state that is lower than the preset state. Other modified embodiments on the basis of the technical concept of the present invention are also possible. 1. A method of operating a plurality of modulation schemes by a base station (BS) in a wireless communication system , the method comprising:identifying a number of mobile stations (MSs) including a channel state equal to or lower than a preset state among all MSs within a cell managed by the BS and reporting information related to the number of MSs to a network entity;receiving information related to a band for a hybrid frequency shift keying (FSK) and a quadrature amplitude modulation (QAM) Modulation (FQAM) scheme based on a QAM scheme and a FSK scheme by from the network entity; andtransmitting information related to the band for the FQAM scheme to at least one of the MSs.2. The method of claim 1 , further comprising:comparing the number of MSs with a preset threshold; andif the number of MSs is larger than or equal to the preset threshold, transmitting a request for allocating the band for the FQAM scheme to the network entity.3. The method of claim 1 , wherein:the band for the FQAM scheme is allocated to ...

UPLINK SIGNAL TRANSMITTING AND RECEIVING METHOD AND DEVICE IN A WIRELESS COMMUNICATION SYSTEM

A method and an apparatus for transmitting and receiving an uplink signal by a mobile terminal in a wireless communication system are provided. The first mobile terminal includes a receiver configured to receive, from a base station, a power control variable determined based on an interference value for a first receive beam used in order to receive an uplink signal of the first mobile terminal from among a plurality of receive beams of the base station, to receive, from the base station, neighboring receive beam allocation data indicating whether any of the receive beams in the plurality of receive beams, different from the first receive beam, is being used for uplink signal reception, to determine an uplink transmit power value based on the received power control variable and neighboring receive beam allocation data, and to transmit an uplink signal to the base station by using the determined uplink transmit power value. 1. A method for transmitting an uplink signal by a first mobile terminal in a wireless communication system , the method comprising:receiving from a base station, a power control variable determined based on an interference value for a first reception beam used for reception of the uplink signal of the first mobile terminal among multiple reception beams of the base station;receiving from the base station, neighboring reception beam allocation information indicating whether to use other reception beams different from the first reception beam among the multiple reception beams for reception of the uplink signal;determining an uplink transmission power value based on the received power control variable and the received neighboring reception beam allocation information; andtransmitting the uplink signal to the base station based on the determined uplink transmission power value.2. The method of claim 1 , wherein the interference value for the first reception beam is determined based on an angle between the first reception beam and at least one second ...

METHOD AND DEVICE FOR SELF-INTERFERENCE CANCELLATION IN FULL-DUPLEX COMMUNICATION SYSTEM

Disclosed is a 5G or pre-5G communication system to be provided for supporting a data transmission rate higher than that of a 4G communication system such as LTE. A method for cancelling self-interference in a full-duplex communication system is provided. The method comprises the steps of: cancelling cancellable self-interference components through an analog interference cancellation circuit, and estimating a channel state of an uplink channel and a channel state of a downlink channel on the basis of remaining residual self-interference components; estimating a channel capacity for each of possible beam combinations on the basis of the estimated uplink channel state and downlink channel state; selecting the beam combination having the largest channel capacity from among the possible beam combinations; and cancelling self-interference from a received signal on the basis of the selected beam combination. 1. A method for cancelling self-interference (SI) in a full-duplex communication system , the method comprising:estimating a channel state of an uplink (UL) channel and a channel state of a downlink (DL) channel;estimating a channel capacity for each of possible beam combinations based on the estimated channel state of the UL channel and the estimated channel state of the DL channel;selecting a beam combination corresponding to a greatest channel capacity from among the possible beam combinations; andcancelling SI from a received signal based on the selected beam combination.2. The method of claim 1 , wherein the estimating of the channel capacity comprises estimating a channel capacity for each of the possible beam combinations by applying a weight value based on a ratio of a traffic volume of the UL channel and a traffic volume of the DL channel to each of the channel state of the UL channel and the channel state of the DL channel.3. The method of claim 1 , wherein the estimating of the channel capacity comprises estimating a channel capacity for each of the ...

METHOD FOR TRANSMITTING AND RECEIVING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM

The present disclosure relates to a 5G or pre-5G communication system to be provided for supporting a data rate higher than that of a 4G communication system, such as LTE, and subsequent communication systems. The present disclosure relates to a method for transmitting a reference signal (RS) in a wireless communication system, comprising the steps of: configuring a transmission resource by including at least one resource block (RB), which does not map the RS, between two RBs, which map the RS, in a first subframe; transmitting a first message for directing an RB offset indicating a gap between the two RBs, which map the RS, and locations of the RBs, which map the RS; and transmitting the RS through the configured transmission resource. 1. A method for transmitting a reference signal (RS) in a wireless communication system , the method comprising:configuring transmission resources by including at least one first resource block (RB) to which an RS is not mapped between two RBs to which the RS is mapped in a first subframe;transmitting a first message, the first message indicating a spacing between the two RBs to which the RS is mapped and an RB offset, wherein the RB offset indicates positions of the two RBs to which the RS is mapped; andtransmitting the RS in the configured transmission resources.2. The method according to claim 1 , wherein the first message indicates the spacing and the RB offset by one value.3. The method according to claim 1 , wherein the RS is channel state information RS (CSI-RS).4. The method according to claim 3 , further comprising:transmitting a second message including information about a spacing between two RBs to which zero powered CSI-RS (ZP-CSI-RS) is mapped.5. The method according to claim 1 , further comprising:configuring the transmission resources by including at least one second RB to which the RS is not mapped between two RBs to which the RS is mapped in a second subframe, wherein a number of the at least one first RB to which ...

APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING FEEDBACK INFORMATION IN BEAMFORMING COMMUNICATION SYSTEM

A method for operating a mobile station in a mobile communication system. The method includes: receiving a plurality of transmit (Tx) beam signals from a base station; generating indication information for indicating a difference in arrival time between effective Tx beam signals selected from the received Tx beam signals; and transmitting feedback information including the indication information to the base station. 1. A method for operating a mobile station in a mobile communication system , the method comprising:receiving a plurality of transmit (Tx) beam signals from a base station;generating indication information for indicating a difference in arrival time between effective Tx beam signals selected from the received Tx beam signals; andtransmitting feedback information including the indication information to the base station.2. The method of claim 1 , wherein the feedback information further includes channel quality information for the effective Tx beam signals.3. The method of claim 1 , wherein the plurality of Tx beam signals include a reference channel signal.4. The method of claim 1 , wherein the effective Tx beam signals include a predetermined number of selected Tx beam signals having excellent received signal quality among the received Tx beam signals.5. The method of claim 1 , wherein generating the indication information comprises:sequentially arranging the selected effective Tx beam signals;grouping effective Tx beam signals in which a difference in arrival time between adjacent Tx beam signals is smaller than a preset threshold value among the sequentially arranged effective Tx beam signals; andgenerating the indication information indicating whether each of the selected effective Tx beam signals is included in the grouped effective Tx beam signals.6. The method of claim 1 , wherein generating the indication information comprises:calculating a relationship of the difference in arrival time between the selected effective Tx beam signals; andgenerating ...

METHOD AND APPARATUS FOR CONTROLLING POWER OF UPLINK IN A BEAM FORMING SYSTEM

A method and an apparatus for controlling power of an uplink in a beam forming system is disclosed. The method includes generating power control information based on a quality of a signal which is measured for each reception beam of a base station, so as to transmit the power control information to terminals. The method also includes receiving a signal transmitted by using the power control information from at least one terminal. 1. A method of controlling power of an uplink in a beam forming system , the method comprising:generating power control information based on a quality of a signal which is measured for each reception beam of a base station, so as to transmit the power control information to terminals; andreceiving a signal transmitted by using the power control information from at least one terminal.2. The method as claimed in claim 1 , wherein the generating and transmitting of the power control information to the terminals comprises:generating an identifier of each reception beam and the power control information by mapping information on the quality of a signal corresponding to a corresponding reception beam, and broadcasting the identifier and the power control information to the terminals; anddetermining at least one terminal among the terminals to transmit an uplink signal, and a reception beam used in receiving the uplink signal which the at least one terminal transmits, and transmitting the identifier of the determined reception beam to the at least one terminal.3. The method as claimed in claim 1 , wherein the generating and transmitting of the power control information to the terminals comprises: broadcasting the power control information comprising a quality value of a common signal calculated based on the signal quality measured for each reception beam.4. The method as claimed in claim 3 , wherein the generating and transmitting of the power control information to the terminals comprises:determining the at least one terminal among the terminals ...

APPARATUS AND METHOD FOR OPERATING MULTIPLE BEAMFORMING TRANSCEIVER IN WIRELESS COMMUNICATION SYSTEM

A method for operating a base station in a wireless communication system in order to support a plurality of propagation characteristics is provided. The method includes allocating resource periods for respective propagation characteristics, transmitting system information including information on the propagation characteristics, transmitting a reference signal with the propagation characteristic corresponding to the relevant resource period through at least one of the resource periods, and receiving feedback information determining channel qualities for all of the propagation characteristics. 1. A method for operating a base station in a wireless communication system , the method comprising:transmitting reference signals of at least one type among a plurality of types;receiving feedback information comprising information regarding channel quality corresponding to the at least one type; andtransmitting data signals through a resource of the at least one type, which is determined based on the feedback information,wherein the plurality of types comprises at least one of a beam pattern, polarization characteristics, antenna structure, a wave strength, and a beamwidth.2. The method of claim 1 , wherein the transmitting of the reference signals comprises claim 1 ,transmitting a first set of reference signals of a first type through a first resource; andtransmitting a second set of reference signals of a second type through a second resource.3. The method of claim 1 , further comprising:transmitting system information comprising information regarding the plurality of types.4. The method of claim 1 , wherein the resource is determined based on at least one of the channel quality corresponding to the at least one type claim 1 , a data type for a terminal claim 1 , a distribution of terminals claim 1 , a size of a cell of the base station claim 1 , and a distance from the terminal.5. The method of claim 1 , further comprising:determining a channel quality corresponding to a ...

CHANNEL STATE INFORMATION FEEDBACK METHOD AND APPARATUS

The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transfer rate beyond a 4G communication system such as LTE. A method and an apparatus for transmitting and receiving channel state information are disclosed. The method comprises: a step of transmitting, to a terminal, a signaling message including first information indicating at least one precoding matrix which is applicable to a symbol vector to be transmitted; a step of transmitting, to the terminal, a channel status information-reference signal (CSI-RS) for the terminal; and a step of receiving channel state information including a channel quality indicator (CQI) which is calculated using the selected precoding matrix on the basis of second information from the terminal. 1. A method for receiving channel state information , the method comprising:transmitting, to a user equipment (UE), a signaling message comprising first information indicating at least one precoding matrix that is applicable to a symbol vector to be transmitted;transmitting, to the UE, a channel status information-reference signal (CSI-RS) for the UE; andreceiving channel state information comprising a channel quality indicator (CQI) that is calculated using a precoding matrix selected based on the first information from the UE.2. The method of claim 1 , wherein the signaling message further comprises second information indicating that a precoding matrix indicator is not reported.3. The method of claim 1 , wherein the channel state information comprises a rank indicator and the CQI without a precoding matrix indicator.4. The method of claim 1 , wherein the CQI included in the channel state information is calculated using a precoding matrix selected from among at least one precoding matrix indicated by the first information.5. The method of claim 1 , wherein the CSI-RS is beamformed based on an uplink signal received from the UE.6. The method of claim 1 , wherein the CQI included in the channel ...

Communication technique using csi-rs in mobile communication system

Disclosed is a 5G or pre-5G communication system to be provided so as to support a data transmission rate higher than that of a 4G communication system, such as LTE. Disclosed is a communication method of a base station using a channel state information reference signal (CSI-RS) in a mobile communication system, the method comprising the steps of: receiving a sounding reference signal (SRS) from a terminal; selecting a precoding matrix by using the received SRS; transmitting a CSI-RS by using the selected precoding matrix; receiving a CSI report from the terminal, and determining a transmission parameter on the basis of the CSI report; and transmitting data to the terminal by applying the determined transmission parameter thereto, wherein the CSI-RS is aperiodically transmitted.

METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA IN A COMMUNICATION SYSTEM USING BEAMFORMING

A method and apparatus for transmitting and receiving data in a communication system using beamforming are provided. The transmission method includes transmitting a control channel signal in a control channel region of a subframe using a first transmission beam of a base station. The transmission method also includes transmitting a data signal during a predetermined time period of a data region after the control channel region in the subframe using a second transmission beam determined based on the first transmission beam. The transmission method further includes transmitting a data signal in a remaining data region following the predetermined time period using a scheduled transmission beam. 1. A method for receiving control information and data by a user equipment (UE) in a wireless communication system supporting beamforming , the method comprising:receiving, from a base station, control information on a downlink control channel using a first reception beam; andreceiving, from the base station, data which is scheduled based on the control information, on a downlink data channel using a second reception beam which is identical or similar to the first reception beam, if a time interval between reception of the control information and the data is less than a threshold.2. The method of claim 1 , wherein the threshold is based on information transmitted by the UE.3. The method of claim 1 , further comprising receiving claim 1 , from the base station claim 1 , the data which is scheduled based on the control information claim 1 , on the downlink data channel using a third reception beam indicated by the base station claim 1 , if the time interval between reception of the control information and the data is equal to or greater than the threshold.4. The method of claim 1 , further comprising receiving configuration information including information on the first reception beam to be used for reception of the control information.5. The method of claim 1 , further comprising ...

METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA IN A COMMUNICATION SYSTEM USING BEAMFORMING

A method and apparatus for transmitting and receiving data in a communication system using beamforming are provided. The transmission method includes transmitting a control channel signal in a control channel region of a subframe using a first transmission beam of a base station. The transmission method also includes transmitting a data signal during a predetermined time period of a data region after the control channel region in the subframe using a second transmission beam determined based on the first transmission beam. The transmission method further includes transmitting a data signal in a remaining data region following the predetermined time period using a scheduled transmission beam. 1. A method for transmitting control information and data by a base station in a wireless communication system supporting beamforming , the method comprising:transmitting, to a user equipment (UE), control information on a downlink control channel using a first transmission beam; andtransmitting, to the UE, data on a downlink data channel using a transmission beam which is identical or similar with the first transmission beam if a time interval between the control information and the data in a sub-frame is less than a threshold, transmission of the data being scheduled based on the control information transmitted in the sub-frame.2. The method of claim 1 , wherein the threshold is based on information received from the UE.3. The method of claim 1 , further comprising transmitting claim 1 , to the UE claim 1 , the data on the downlink data channel using a second transmission beam scheduled by the base station if a time interval between the control information and the data in the sub-frame is equal to or greater than a threshold claim 1 , transmission of the data being scheduled based on the control information transmitted in the sub-frame.4. The method of claim 1 , further comprising transmitting configuration information including information on the first transmission beam to be ...

Method and apparatus for operating beamformed reference signal in communication system

The present disclosure relates 5G or pre-5G communication systems for supporting higher data transmission rate than those by LTE or other post-4G communication systems. According to the present disclosure, a method for operating a beamformed reference signal by a base station and terminal in a communication system, and the terminal, are provided. The method includes transmitting, to a terminal, control information indicating whether a first codebook is used for generating feedback information on a downlink reference signal. The first codebook is used if generating feedback information on the beamformed reference signal and is generated based on a number of antenna ports and a number of ranks.

MULTICAST SERVICE METHOD AND APPARATUS IN MOBILE COMMUNICATION SYSTEM

A method of providing a multicast service in a mobile communication system includes dividing original multicast data into a plurality of multicast data to generate a plurality of multicast streams having different data rates and transmitting a first transmission frame including the plurality of multicast streams to a plurality of user equipments; receiving a report on a data rate corresponding to an unreceived multicast stream among the plurality of multicast streams from one or more user equipments among the plurality of user equipments; and transmitting a second transmission frame including the unreceived multicast stream to the plurality of user equipments including the one or more user equipments. 1. A method of providing a multicast service in a mobile communication system , the method comprising:dividing original multicast data into a plurality of multicast data to generate a plurality of multicast streams having different data rates transmitting a first transmission frame including the plurality of multicast streams to a plurality of user equipments;receiving a report on a data rate corresponding to an unreceived multicast stream among the plurality of multicast streams from one or more user equipments among the plurality of user equipments; andtransmitting a second transmission frame including the unreceived multicast stream to the plurality of user equipments including the one or more user equipments.2. The method of claim 1 , wherein a main multicast stream of the plurality of multicast streams including data containing basic information of the original multicast data to provide a low quality original service corresponds to a lowest data rate claim 1 , and remaining multicast streams sequentially correspond to higher data rates.3. The method of claim 2 , wherein the first transmission frame is transmitted by a node B of a macro cell.4. The method of claim 2 , wherein the second transmission frame is transmitted by a node B of a macro cell or a node B of a ...

APPARATUS AND METHOD FOR ADAPTIVELY DETERMINING TX BEAM SUBSET FOR RANDOM ACCESS IN WIRELESS COMMUNICATION SYSTEM

To adaptively determine a Tx beam subset for random access in a wireless communication system, a method for operating a Mobile Station (MS) includes determining at least one beam subset which satisfies a predefined condition, among a plurality of beam subsets, and transmitting random access preambles using Tx beams of the at least one beam subset. An MS in a wireless communication system includes a controller configured to determine at least one beam subset that satisfies a condition, among a plurality of beam subsets, and a transmitter configured to transmit random access preambles using Transmit (Tx) beams of the at least one beam subset, wherein the plurality of the beam subsets each comprise a plurality of beams radiating to different directions from one another. Other embodiments including a base station and a mobile station are also disclosed. 1. A method for operating a Mobile Station (MS) in a wireless communication system , the method comprising:determining at least one beam subset that satisfies a condition, among a plurality of beam subsets; andtransmitting random access preambles using Transmit (Tx) beams of the at least one beam subset,wherein the plurality of the beam subsets each comprise a plurality of beams radiating to different directions from one another.2. The method of claim 1 , wherein the plurality of the beam subsets each comprise a plurality of beams having different beamwidths from one another.3. The method of claim 1 , wherein the condition is whether a target Rx power value of a Base Station (BS) is satisfied by considering at least one of a beamforming gain claim 1 , a path loss claim 1 , and a power adjustment value based on a preamble type.4. The method of claim 1 , wherein transmitting the random access preambles using the Tx beams of the at least one beam subset comprises:determining one of the beam subsets satisfying the condition.5. The method of claim 4 , wherein determining the at least one the beam subset satisfying the ...

METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM

The present invention relates to a method for transmitting data in a wireless communication system, comprising the steps of: allocating, by a base station, a resource for transmitting data modulated by a hybrid frequency shift keying (FSK) and quadrature amplitude modulation (QAM) (FQAM) scheme in which a QAM scheme and a FSK scheme are combined; transmitting, by the base station, a sequence modulated by the FQAM scheme, to a mobile station, via an interference measurement channel; transmitting, by the base station, a reference signal for measuring channel quality information (CQI) to the mobile station; receiving, by the base station, CQI estimated based on an interference characteristic of the interference measurement channel, from the mobile station, and performing scheduling of the mobile station based on the received CQI and transmitting, by the base station, the data modulated by the FQAM scheme to the mobile station. 124-. (canceled)25. A method of transmitting data in a wireless communication system , comprising:allocating, by a base station, a resource for transmitting data modulated by a hybrid frequency shift keying (FSK) and quadrature amplitude modulation (QAM) (FQAM) scheme in which a QAM scheme and a FSK scheme are combined;transmitting, by the base station, a sequence modulated by the FQAM scheme, to a mobile station, via an interference measurement channel;transmitting, by the base station, a reference signal for measuring channel quality information (CQI) to the mobile station;receiving, by the base station, CQI estimated based on an interference characteristic of the interference measurement channel, from the mobile station, and performing scheduling of the mobile station based on the received CQI; andtransmitting, by the base station, the data modulated by the FQAM scheme to the mobile station.26. The method of claim 25 , wherein the sequence is transmitted in the same frame as the data claim 25 , the sequence being adjacent to the data.27. The ...

DISTRIBUTED SCHEDULING METHOD AND APPARATUS FOR RESOURCE ALLOCATION FOR DEVICE-TO-DEVICE COMMUNICATION

Provided is a distributed scheduling method and apparatus for resource allocation for Device-to-Device (D2D) communication. The method includes sending, by a Mobile Station (MS) including data to transmit, a first resource reservation message through at least one first slot among a plurality of slots constituting a resource reservation unit in a resource reservation channel; and when a second resource reservation message sent by another MS is not sensed in a slot with a higher priority than the first slot in the resource reservation unit, transmitting the data through a transmission resource unit corresponding to the resource reservation unit in a data transmission channel. The resource reservation channel corresponds to the transmission resource unit, and the plurality of slots has mutually cyclic priorities. 1. A distributed scheduling method for resource allocation for Device-to-Device (D2D) communication , the method comprising:sending, by a Mobile Station (MS) with data to transmit, a first resource reservation message through at least one first slot among a plurality of slots constituting a resource reservation unit in a resource reservation channel; andwhen a second resource reservation message sent by another MS is not sensed in a slot with a higher priority than the first slot in the resource reservation unit, transmitting the data through a transmission resource unit corresponding to the resource reservation unit in a data transmission channel;wherein the resource reservation channel corresponds to the transmission resource unit, and the plurality of slots comprise mutually cyclic priorities.2. The distributed scheduling method of claim 1 , wherein among the plurality of slots claim 1 , a slot with a lower index has a higher priority and a slot with a lowest index has a lower priority than a slot with a highest index.3. The distributed scheduling method of claim 1 , further comprising omitting listening to at least one slot with a lower priority than the ...

METHOD AND APPARATUS FOR OPERATING BEAMFORMED REFERENCE SIGNAL IN COMMUNICATION SYSTEM

The present disclosure relates 5G or pre-5G communication systems for supporting higher data transmission rate than those by LTE or other post-4G communication systems. According to the present disclosure, a method for operating a beamformed reference signal by a base station and terminal in a communication system, and the terminal, are provided. The method includes transmitting, to a terminal, control information indicating whether a first codebook is used for generating feedback information on a downlink reference signal. The first codebook is used if generating feedback information on the beamformed reference signal and is generated based on a number of antenna ports and a number of ranks. 1. A method for processing a reference signal by a base station in a communication system , the method comprising:transmitting, to a terminal, configuration information indicating that a codebook is related to a beamformed reference signal,{'sub': 'i', 'sup': '(N)', 'wherein the codebook is configured based on a vector eassociated with rank-1 or rank 2.'}2. The method of claim 1 , wherein the vector eis a vector of N size claim 1 , and the N is a half of a number of antenna ports.3. The method of claim 1 , wherein ith elements of the vector eare 1 claim 1 , and the other elements of vector eis are 0's.4. The method of claim 1 , wherein a first half row and a second half row of the codebook is configured with the vector erespectively.5. The method of claim 1 , further comprising:transmitting, to the terminal, a downlink reference signal based on the configuration information; andreceiving, from the terminal, CSI feedback information on the downlink reference signal,wherein the CSI feedback information is generated based on the codebook.6. A method for processing a reference signal by a terminal in a communication system claim 1 , the method comprising:receiving, from a base station, configuration information indicating that a codebook is related to a beamformed reference signal ...

APPARATUS AND METHOD FOR RANDOM ACCESS IN WIRELESS COMMUNICATION SYSTEM USING BEAMFORMING

An apparatus implements methods for random access in a wireless communication system using beamforming. A Subscriber Station (SS) measures a best downlink transmission beam among downlink transmission beams transmitted from a Base Station (BS), and transmits Random Access Channel (RACH) information, which includes indication information indicating the best downlink transmission beam, to the BS. The BS receives RACH information which includes indication information indicating a best downlink transmission beam among downlink transmission beams, and detects an RACH sequence and the best downlink transmission beam from the received RACH information. 1. A method for operating a terminal in a wireless environment , the method comprising:receiving, from a base station (BS), a set of a synchronization signal and a broadcast signal transmitted via each of a plurality of downlink (DL) transmit (Tx) beam;determining a random access channel (RACH) opportunity corresponding to a DL Tx beam among the plurality of DL Tx beams based on configuration information comprising information for indicating a mapping relationship between each RACH opportunity and each of the plurality of DL Tx beams, andtransmitting, to the BS, a RACH sequence through the determined RACH opportunity,wherein the configuration information is received by the terminal from the BS.2. The method of claim 1 , wherein the configuration information comprises information regarding a number of DL Tx beams for each RACH opportunity claim 1 , and information regarding a number of RACH sequences for each DL Tx beam.3. The method of claim 2 , further comprising:determining a group of RACH sequences corresponding to the DL Tx beam in the RACH opportunity based on the information regarding the number of DL Tx beams for each RACH opportunity, and the information regarding the number of RACH sequences for each DL Tx beam; anddetermining the RACH sequence among the group of RACH sequences.4. The method of claim 1 , wherein the ...

METHOD FOR TRANSMITTING AND RECEIVING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM

The present disclosure relates to a 5G or pre-5G communication system to be provided for supporting a data rate higher than that of a 4G communication system, such as LTE, and subsequent communication systems. The present disclosure relates to a method for transmitting a reference signal (RS) in a wireless communication system, comprising the steps of: configuring a transmission resource by including at least one resource block (RB), which does not map the RS, between two RBs, which map the RS, in a first subframe; transmitting a first message for directing an RB offset indicating a gap between the two RBs, which map the RS, and locations of the RBs, which map the RS; and transmitting the RS through the configured transmission resource. 1. A method for transmitting a channel state information reference signal (CSI-RS) in a wireless communication system , the method comprising:transmitting information on CSI-RS resource mapping, the information on the CSI-RS resource mapping including information related to at least one resource block (RB) to which a CSI-RS is not mapped, wherein the at least one RB is located between two RBs to which the CSI-RS is mapped respectively, and wherein the at least one RB is located between the two RBs in a frequency domain; andtransmitting the CSI-RS based on the information on CSI-RS resource mapping.2. The method of claim 1 , wherein the information on the CSI-RS resource mapping includes information on one or more resource elements (REs) per a RB claim 1 , each of the one or more REs mapped to a CSI-RS port.3. The method of claim 1 , wherein the information on CSI-RS resource mapping includes information indicating an RB offset claim 1 , andwherein the RB offset indicates which RBs are occupied by the CSI-RS.4. The method of claim 3 , wherein the RB offset indicates positions of the two RBs to which the CSI-RS is mapped.5. The method of claim 1 , wherein the information on CSI-RS resource mapping includes information of zero powered ...

APPARATUS AND METHOD FOR RANDOM ACCESS IN WIRELESS COMMUNICATION SYSTEM USING BEAMFORMING

An apparatus implements methods for random access in a wireless communication system using beamforming. A Subscriber Station (SS) measures a best downlink transmission beam among downlink transmission beams transmitted from a Base Station (BS), and transmits Random Access Channel (RACH) information, which includes indication information indicating the best downlink transmission beam, to the BS. The BS receives RACH information which includes indication information indicating a best downlink transmission beam among downlink transmission beams, and detects a RACH sequence and the best downlink transmission beam from the received RACH information. 1. A method for operating a terminal in a wireless environment , the method comprising:receiving, from a base station (BS), one or more downlink (DL) transmit (Tx) signal comprising one or more set of one or more synchronization signal and one or more broadcast signal;receiving, from the BS, configuration information indicating a first configured number of at least one set of at least one synchronization signal and at least one broadcast signal transmitted via at least one DL Tx signal mapped to each random access channel (RACH) opportunity, wherein the configuration information further indicates a second configured number of RACH preambles for each DL Tx signal;determining a RACH opportunity corresponding to a set of a synchronization signal and a broadcast signal transmitted via a DL Tx signal from among the one or more set based on the configuration information; andtransmitting, to the BS, a RACH preamble through the determined RACH opportunity.2. The method of claim 1 , further comprising:determining a group of RACH preambles corresponding to the DL Tx signal in the determined RACH opportunity based on the first configured number and the second configured number; anddetermining the RACH preamble among the group of RACH preambles.3. The method of claim 1 , wherein the one or more DL Tx signal corresponds to one or more ...

Apparatus and method for composing diversity subchannel in wireless communication system

Method and apparatus for transmitting and receiving information for random access in wireless communication system

A method and a Base Station (BS) of transmitting information for Random Access (RA) by a base station in a wireless communication system are provided. The BS generates RA information for beam alignment between the base station and each of a plurality of mobile terminals based on a number of reception beam forming patterns of the base station used for each of one or more RA channels and broadcasts the RA information to the plurality of mobile terminals. The RA information comprises information related to the number of reception beam forming patterns of the base station used for each of the one or more RA channels.

Power control apparatus and method of time division duplex (TDD) telecommunication system

Provided is a power control apparatus and method of a time division duplex (TDD) communication system. The power control apparatus includes an uplink power determiner for determining an uplink power value using a power control computation element of a current frame, which is acquired using a power control computation element of a prior frame and a power increase/decrease change estimated from a downlink, and a cell interference received from a base transceiver station (BTS); and an uplink power controller for controlling an uplink power by sending the uplink power value from the uplink power determiner to a transmitter.

Apparatus and method for transmitting / receiving an uplink pilot signal in a communication system using an orthogonal frequency division multiple access scheme

An apparatus and method for transmitting a reference signal in an Orthogonal Frequency Division Multiple Access (OFDMA) communication system in which a total frequency band is divided into a plurality of subcarrier bands. A time division multiplexer performs time division multiplexing such that the reference signal is transmitted for a first duration in a predetermined number of subcarrier bands from among the plurality of the subcarrier bands, and a signal other than the reference signal is transmitted for a second duration other than the first duration. A transmitter transmits the time-division multiplexed subcarrier band signals.

Apparatus and method for controlling a hybrid automatic repeat request operation in a wireless mobile communication system

An apparatus and method for controlling a Hybrid Automatic Repeat reQuest (HARQ) operation in a transmitter of a wireless mobile communication system using each frame constituted by a plurality of subframes are provided. In the method for controlling an HARQ operation, indication information indicating a subframe position where transmission of a data burst starts and the number of subframes required for transmission of the data burst is transmitted to a receiver through an i-th frame. When the number of subframes does not exceed a threshold, it is determined that the data burst at the subframe position indicated by indication information of an (i+l)-th frame is retransmitted to the receiver. When the number of subframes exceeds the threshold, it is determined that the data burst at the subframe position indicated by indication information of an (i+n)-th frame, where n is a positive integer exceeding 1, is retransmitted to the receiver.

System and method for transmitting data bursts in communication systems

Disclosed is a method for transmitting data bursts by a base station in a communication system, including forming one group which includes at least one subchannel and transmitting at least two data bursts having an equal transmission characteristic through each subchannel included in the group.

Method and apparatus for supporting handover in heterogeneous network

A method for operating a terminal for supporting a handover in a heterogeneous network is provided. The method includes measuring received signal strength from a target small base station, so that a Signal-to-Noise Ratio (SNR) is estimated, when the SNR of the target small base station that considers a biased value for range expansion is greater than an SNR of a serving macro base station, determining whether an SNR of the target small base station that does not consider the biased value for the range expansion is equal to or less than a threshold, and when the SNR of the target small base station that does not consider the biased value for the range expansion is equal to or less than the threshold, transmitting indication information, informing that a low SNR is expected when the terminal performs a handover to the target small base station, to the serving macro base station.

Method and apparatus for supporting mobile station disconnected from a base station in wireless communication system

A method and apparatus support a Mobile Station (MS) located in a collapsed cell area to be disconnected from a Base Station (BS) in a wireless communication system. A method of an MS for supporting an disconnected MS disconnected from a BS in a wireless communication system includes receiving a rescue signal from the disconnected MS; collecting information to determine a support MS for the disconnected MS; and transmitting the collected information to a serving BS.

Apparatus and method for transmitting and receiving feedback information in beamforming communication system

A method for operating a mobile station in a mobile communication system. The method includes: receiving a plurality of transmit (Tx) beam signals from a base station; generating indication information for indicating a difference in arrival time between effective Tx beam signals selected from the received Tx beam signals; and transmitting feedback information including the indication information to the base station.

Apparatus and method for switching between an AMC mode and a diversity mode in a broadband wireless communication

An apparatus and method for switching between an AMC mode and a diversity mode adaptively according to a channel environment in a broadband wireless communication system are provided. According to the present invention, a transmitter (a base station) determines a transmission mode according to frequency-domain and time-domain channel measurement information received from a receiver (a mobile station). If the transmission mode is the AMC mode, the transmitter selects a coding and modulation scheme according to a frequency-domain CQI received from the receiver. If the transmission mode is a diversity mode, the transmitter selects a predetermined coding and modulation scheme.

Transmitting and receiving apparatus and method for optimizing performance of adaptive modulation and coding in a multiple input and multiple output antenna communication system

A transmitting and receiving apparatus and method for optimizing performance of an adaptive modulation and coding (AMC) in a multiple input and multiple output antenna (MIMO) communication system. When the AMC is applied to the MIMO system, the optimal scheme is different depending on the MIMO channel situation, the maximum transmission power, and the maximum modulation order. The transmitting apparatus includes an ordering selector that selects a successive interference cancellation (SIC) scheme in order to obtain a maximum MIMO-AMC performance, and the receiving apparatus includes a channel quality information (CQI) generator corresponding to the SIC scheme selected at the transmitting apparatus.

Apparatus and method for operating multiple beamforming transceiver in wireless communication system

A method for operating a base station in a wireless communication system in order to support a plurality of propagation characteristics is provided. The method includes allocating resource periods for respective propagation characteristics, transmitting system information including information on the propagation characteristics, transmitting a reference signal with the propagation characteristic corresponding to the relevant resource period through at least one of the resource periods, and receiving feedback information determining channel qualities for all of the propagation characteristics.

Method and apparatus for power control in wireless communication system

An apparatus and a method for transiting from one power control scheme to another power control scheme when power control schemes are used in a wireless communication system are provided. A method of a terminal for changing a power control scheme in a wireless communication system includes controlling power according to a first power control scheme based on first power control parameters received from a base station, receiving second power control parameters to use in a second power control scheme, from the base station, sending a power control transition message informing the base station of a transition of the power control scheme, to the base station, and controlling the power according to the second power control scheme using the second power control parameters.

Channel interleaving/deinterleaving apparatus in a communication system using low density parity check code and control method thereof

A channel interleaving method and apparatus in a communication system using a low density parity check (LDPC) code. Upon receipt of information data bits, an encoder encodes the information data bits into an LDPC codeword using a predetermined coding scheme. A channel interleaver interleaves the LDPC codeword according to a predetermined channel interleaving rule. A modulator modulates the channel-interleaved LDPC codeword into a modulation symbol using a predetermined modulation scheme.

Apparatus and method for operating multiple beamforming transceiver in wireless communication system

A method for operating a base station in a wireless communication system in order to support a plurality of propagation characteristics is provided. The method includes allocating resource periods for respective propagation characteristics, transmitting system information including information on the propagation characteristics, transmitting a reference signal with the propagation characteristic corresponding to the relevant resource period through at least one of the resource periods, and receiving feedback information determining channel qualities for all of the propagation characteristics.

Method and apparatus for operating beamformed reference signal in communication system

The present disclosure relates 5G or pre-5G communication systems for supporting higher data transmission rate than those by LTE or other post-4G communication systems. According to the present disclosure, a method for operating a beamformed reference signal by a base station and terminal in a communication system, and the terminal, are provided. The method includes transmitting, to a terminal, control information indicating whether a first codebook is used for generating feedback information on a downlink reference signal. The first codebook is used if generating feedback information on the beamformed reference signal and is generated based on a number of antenna ports and a number of ranks.

Method and apparatus for operating beamformed reference signal in communication system

The present disclosure relates 5G or pre-5G communication systems for supporting higher data transmission rate than those by LTE or other post-4G communication systems. According to the present disclosure, a method for operating a beamformed reference signal by a base station and terminal in a communication system, and the terminal, are provided. The method includes transmitting, to a terminal, control information indicating whether a first codebook is used for generating feedback information on a downlink reference signal. The first codebook is used if generating feedback information on the beamformed reference signal and is generated based on a number of antenna ports and a number of ranks.

Apparatus and method for transmitting/receiving an uplink pilot signal in a communication system using an orthogonal frequency division multiple access scheme

Method for performing hybrid automatic repeat request operation in a wireless mobile communication system

A METHOD FOR PERFORMING A HYBRID AUTOMATIC REPEAT REQUEST (HARQ) OPERATION IN A WIRELESS MOBILE COMMUNICATION SYSTEM THAT USES FREQUENCY DIVISION DUPLEX (FDD) OR TIME DIVISION DUPLEX (TDD) FRAMES EACH HAVING A PLURALITY OF SUBFRAMES FOR COMMUNICATION ARE PROVIDED, IN WHICH AN HARQ TIMING INCLUDING A TRANSMISSION TIME OF A DATA BURST AND A TRANSMISSION TIME OF AN HARQ FEEDBACK, FOR DL HARQ IS DETERMINED ACCORDING TO DATA BURST ASSIGNMENT INFORMATION TRANSMITTED IN A #L DOWNLINK (DL) SUBFRAME OF A #i FRAME, AND AN HARQ OPERATION IS PERFORMED ACCORDING TO THE DETERMINED HARQ TIMING. AT LEAST ONE FRAME INDEX AND AT LEAST ONE SUBFRAME INDEX THAT REPRESENT THE HARQ TIMING ARE DETERMINED BY USING L AND I. (FIGURE 3)

Method for performing hybrid automatic repeat request operation in a wireless mobile communication system

Apparatus and method for random access in wireless communication system using beamforming

An apparatus implements methods for random access in a wireless communication system using beamforming. A Subscriber Station (SS) measures a best downlink transmission beam among downlink transmission beams transmitted from a Base Station (BS), and transmits Random Access Channel (RACH) information, which includes indication information indicating the best downlink transmission beam, to the BS. The BS receives RACH information which includes indication information indicating a best downlink transmission beam among downlink transmission beams, and detects an RACH sequence and the best downlink transmission beam from the received RACH information.

Apparatus and method for scheduling using beam scanning in beamformed wireless communication system

An apparatus and a method for beam selection and inter-beam scheduling using beam scanning in a beamformed wireless communication system are provided. A method for transmitting a signal in a transmitting stage includes transmitting a reference signal through at least one transmission beam, receiving channel information of at least one transmission beam from a receiving stage, selecting a first transmission beam for sending a signal to the receiving stage, by considering the channel information of the at least one transmission beam provided from the receiving stage, and performing inter-beam scheduling for the receiving stage by considering ID information of the first transmission beam.

Apparatus and method for configuring wireless back haul link in wireless communication system

Provided is a method for configuring a wireless backhaul link by a Mobile Station (MS) in a wireless communication system. The method includes acquiring System Information (SI) for each of an old Base Station (BS) which transmits a first code and a new BS which transmits a second code. The method includes transmitting a message which reports the SI for the new BS to the old BS. The method includes receiving a message indicating that the new BS discards the second code and uses the first code from the old BS, wherein the first code is a code indicating that a related BS is a BS which has been already deployed, and wherein the second code is a code indicating that a related BS is a BS which is newly deployed.

Apparatus and method for composing diversity subchannel in wireless communication system

An apparatus and a method for composing a subchannel in a wireless communication system are provided. The method includes performing a subband-based permutation on resources for composing a subchannel; selecting one or more subbands as resources for a band selection subchannel from the resources passing through the subband-based permutation; composing the band selection subchannel using at least one of the selected subbands; performing a resource allocation unit based permutation on resources not selected for the band selection subchannel; composing a resource allocation unit based diversity subchannel using subband remained in the selected subbands after the band selection subchannel is composed and at least one of the resource allocation units of the resources passing through the resource allocation unit based permutation; and composing a tone-based diversity subchannel by performing a tone-based permutation on resources remained after the resource allocation unit based diversity subchannel is composed.

apparatus and method for composing a diversity subchannel in a wireless communication system

APARELHO E MÉTODO PARA COMPOSIÇÃO DE SUBCANAL DE DIVERSIDADE EM SISTEMA DE COMUNICAÇÃO SEM FIO Um aparelho e um método para a composição de um subcanal em um sistema de comunicação sem fio são providos. O método inclui a realização de uma permutação baseada em sub-banda em recursos para a composição de um subcanal; a seleção de uma ou mais sub-bandas como recursos para um subcanal de seleção de banda a partir de recursos que passam através da permutação baseada em sub-banda; a composição do subcanal de seleção de banda usando pelo menos uma das sub-bandas selecionadas; a realização de uma permutação baseada em unidade de alocação de recurso em recursos não selecionados para o subcanal de seleção de banda; a composição de um subcanal de diversidade baseado em unidade de alocação de recurso usando uma sub-banda remanescente na sub-banda selecionada após o subcanal de seleção de banda ser composto e pelo menos uma das unidades de alocação de recurso dos recursos passando através da permutação baseada em unidade de alocação de recurso; e a composição de um subcanal de diversidade baseado em tom pela realização de uma permutação baseada 'em tom nos recursos remanescentes após o subcanal de diversidade baseado em unidade de alocação de recurso ser composto. APPARATUS AND METHOD FOR COMPOSING A DIVERSITY SUB-CHANNEL IN A WIRELESS COMMUNICATION SYSTEM An apparatus and method for composing a subchannel in a wireless communication system are provided. The method includes performing a subband-based permutation of resources for the composition of a subchannel; selecting one or more sub-bands as resources for a band selection sub-channel from resources that pass through sub-band based permutation; the composition of the band selection subchannel using at least one of the selected subbands; carrying out a permutation based on a resource allocation unit in unselected resources for the band selection subchannel; the composition of a diversity subchannel based on a resource ...

Apparatus and method for configuring wireless back haul link in wireless communication system

Provided is a method for configuring a wireless backhaul link by a Mobile Station (MS) in a wireless communication system. The method includes acquiring System Information (SI) for each of an old Base Station (BS) which transmits a first code and a new BS which transmits a second code. The method includes transmitting a message which reports the SI for the new BS to the old BS. The method includes receiving a message indicating that the new BS discards the second code and uses the first code from the old BS, wherein the first code is a code indicating that a related BS is a BS which has been already deployed, and wherein the second code is a code indicating that a related BS is a BS which is newly deployed.

Apparatus and method for controlling a hybrid automatic repeat request operation in a wireless mobile communication system

An apparatus and method for controlling a Hybrid Automatic Repeat reQuest (HARQ) operation in a transmitter of a wireless mobile communication system using each frame constituted by a plurality of subframes are provided. In the method for controlling an HARQ operation, indication information indicating a subframe position where transmission of a data burst starts and the number of subframes required for transmission of the data burst is transmitted to a receiver through an i-th frame. When the number of subframes does not exceed a threshold, it is determined that the data burst at the subframe position indicated by indication information of an (i+l)-th frame is retransmitted to the receiver. When the number of subframes exceeds the threshold, it is determined that the data burst at the subframe position indicated by indication information of an (i+n)-th frame, where n is a positive integer exceeding 1, is retransmitted to the receiver.

Apparatus and method for composing diversity subchannel in wireless communication system

An apparatus and a method for composing a subchannel in a wireless communication system are provided. The method includes performing a subband-based permutation on resources for composing a subchannel; selecting one or more subbands as resources for a band selection subchannel from the resources passing through the subband-based permutation; composing the band selection subchannel using at least one of the selected subbands; performing a resource allocation unit based permutation on resources not selected for the band selection subchannel; composing a resource allocation unit based diversity subchannel using subband remained in the selected subbands after the band selection subchannel is composed and at least one of the resource allocation units of the resources passing through the resource allocation unit based permutation; and composing a tone-based diversity subchannel by performing a tone-based permutation on resources remained after the resource allocation unit based diversity subchannel is composed.

Channel interleaving/deinterleaving apparatus in a communication system using low density parity check code and control method thereof

A channel interleaving method and apparatus in a communication system using a low density parity check (LDPC) code. Upon receipt of information data bits, an encoder encodes the information data bits into an LDPC codeword using a predetermined coding scheme. A channel interleaver interleaves the LDPC codeword according to a predetermined channel interleaving rule. A modulator modulates the channel-interleaved LDPC codeword into a modulation symbol using a predetermined modulation scheme.

Communication technique using CSI-RS in mobile communication system

Disclosed is a 5G or pre-5G communication system to be provided so as to support a data transmission rate higher than that of a 4G communication system, such as LTE. Disclosed is a communication method of a base station using a channel state information reference signal (CSI-RS) in a mobile communication system, the method comprising the steps of: receiving a sounding reference signal (SRS) from a terminal; selecting a precoding matrix by using the received SRS; transmitting a CSI-RS by using the selected precoding matrix; receiving a CSI report from the terminal, and determining a transmission parameter on the basis of the CSI report; and transmitting data to the terminal by applying the determined transmission parameter thereto, wherein the CSI-RS is aperiodically transmitted.

Method and apparatus for transmitting and receiving information for random access in wireless communication system

A method and a Base Station (BS) of transmitting information for Random Access (RA) by a base station in a wireless communication system are provided. The BS generates RA information for beam alignment between the base station and each of a plurality of mobile terminals based on a number of reception beam forming patterns of the base station used for each of one or more RA channels and broadcasts the RA information to the plurality of mobile terminals. The RA information comprises information related to the number of reception beam forming patterns of the base station used for each of the one or more RA channels.

Apparatus and method for controlling a hybrid automatic repeat request operation in a wireless mobile communication system

An apparatus and method for controlling a Hybrid Automatic Repeat reQuest (HARQ) operation in a transmitter of a wireless mobile communication system using each frame constituted by a plurality of subframes are provided. In the method for controlling an HARQ operation, indication information indicating a subframe position where transmission of a data burst starts and the number of subframes required for transmission of the data burst is transmitted to a receiver through an i-th frame. When the number of subframes does not exceed a threshold, it is determined that the data burst at the subframe position indicated by indication information of an (i+1)-th frame is retransmitted to the receiver. When the number of subframes exceeds the threshold, it is determined that the data burst at the subframe position indicated by indication information of an (i+n)-th frame, where n is a positive integer exceeding 1, is retransmitted to the receiver.

Method and apparatus for beam allocation in wireless communication system

A beam allocation method of a Base Station (BS) in a wireless communication system is provided. The method includes transmitting a reference signal to a Mobile Station (MS) using a plurality of downlink transmit (Tx) beams, receiving information of a plurality of candidate downlink Tx beams determined by the MS in response to the received reference signal, selecting at least one downlink Tx beam from the plurality of candidate downlink Tx beams according to a predefined rule, generating control information for burst transmission, comprising the selected at least one downlink Tx beam information, transmitting the control information to the MS using the selected at least one downlink Tx beam, and transmitting a data burst based on Tx beam information included in the control information.

Apparatus and method for operating multiple beamforming transceiver in wireless communication system

A method for operating a base station in a wireless communication system in order to support a plurality of propagation characteristics is provided. The method includes allocating resource periods for respective propagation characteristics, transmitting system information including information on the propagation characteristics, transmitting a reference signal with the propagation characteristic corresponding to the relevant resource period through at least one of the resource periods, and receiving feedback information determining channel qualities for all of the propagation characteristics.

Apparatus and method for scheduling using beam scanning in beamformed wireless communication system

An apparatus and a method for beam selection and inter-beam scheduling using beam scanning in a beamformed wireless communication system are provided. A method for transmitting a signal in a transmitting stage includes transmitting a reference signal through at least one transmission beam, receiving channel information of at least one transmission beam from a receiving stage, selecting a first transmission beam for sending a signal to the receiving stage, by considering the channel information of the at least one transmission beam provided from the receiving stage, and performing inter-beam scheduling for the receiving stage by considering ID information of the first transmission beam.

طريقة لإجراء عملية طلب متكرر آلي مهجن في نظام اتصالات لاسلكي محمول

يتعلق الاختراع بطريقة لإجراء عملية طلب متكرر آلي مهجن Hybrid Automatic Repeat reQuest (HARQ) في نظام اتصالات لاسلكي محمول wireless mobile communication system يستخدم إطار مزدوج تقسيم تردد Frequency Division Duplex (FDD) أو إطار مزدوج تقسيم زمن Time Division Duplex كل منهما به مجموعة من إطارات فرعية subframes للاتصالات، يشتمل فيها توقيت طلب متكرر آلي مهجن Hybrid Automatic Repeat reQuest (HARQ) على زمن لإرسال دفعة بيانات وزمن إرسال رد طلب متكرر آلي مهجن، وبالنسبة لـلطلب المتكرر الآلي المهجن للوصلة الهابطة فإنه يتم تحديدها وفقاً لمعلومات تخصيص دفعة البيانات المرسلة في إطار فرعي للوصلة الهابطة DownLink (DL) رقم l للإطار i، ويتم إجراء عملية طلب متكرر آلي مهجن وفقاً لتوقيت طلب متكرر آلي مهجن المحدد. ويتم تحديد معامل إطار frame indexes واحد على الأقل ومعامل الإطار الفرعي index of a subframe واحد على الأقل يمثلان توقيت طلب متكرر آلي مهجن باستخدام l و i.

Apparatus and method for initial access in wireless communication system with hierarchical cell structure

An initial access procedure in a wireless communication of a hierarchical cell structure includes operations of a mobile station (MS). The operations of the MS include transmitting an initial access message; obtaining information of a small cell Base Station (BS) which receives the initial access message, from a response message received from a macro BS; attempting to decode a reference channel transmitted by the small cell BS; and when successfully decoding the reference channel, setting a downlink channel with the small cell BS.