Abstract: Methods and apparatuses for adapting a bandwidth of a terminal in a wireless communication system are provided. The method includes transmitting, to a base station (BS), information about bandwidth adaptation capability of the terminal, receiving, from the BS, a bandwidth adaptation command for requesting adaptation to a bandwidth corresponding to the bandwidth adaptation capability of the terminal, and adapting the bandwidth of the terminal in at least one symbol location in a unit time period of a subframe, based on the received bandwidth adaptation command.

Abstract: Provided are a method and apparatus for transmitting and receiving channel information in a wireless communication system. The method for transmitting and receiving channel information in a wireless communication system includes: receiving information about a channel information providing method from a base station; receiving, from the base station, a reference signal for measuring a channel status between the base station and the terminal; determining channel information for a plurality of services, based on the information about the channel information providing method and the reference signal; and transmitting, to the base station, the channel information for the plurality of services.

Abstract: Provided are a method and apparatus for supporting beam-based cooperative communication for smoothly providing a service in a wireless communication system. The method, performed by a terminal, of supporting beam-based cooperative communication includes: receiving, from a base station, configuration information for measuring quality of a beam; receiving first reference signals regarding desired channels respectively corresponding to a plurality of transmission beams received from the base station, and second reference signals regarding interference channels respectively corresponding to a plurality of transmission beams that interfere with the plurality of transmission beams received from the base station; and measuring quality of a beam regarding the plurality of transmission beams received from the base station, based on the configuration information, the first reference signals, and the second reference signals.

Abstract: The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transmission rate beyond a 4G communication system such as LTE. To this end, a base station using a large-scale antenna transmits, to a terminal, reference signal resource configuration information including multiple pieces of reference signal configuration information and reference signal port information, for transmission of a reference signal, and transmits the reference signal to the terminal using some or all of channel measurement resources indicated by the multiple pieces of reference signal configuration information and the reference signal port information included in the reference signal resource configuration information. In this case, the channel measurement resources may correspond to antenna ports, the number of which is indicated by a combination of the multiple pieces of reference signal configuration information and the reference signal port information.

Abstract: The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transmission rate beyond a 4G communication system such as LTE. To this end, a base station using a large-scale antenna transmits, to a terminal, reference signal resource configuration information including multiple pieces of reference signal configuration information and reference signal port information, for transmission of a reference signal, and transmits the reference signal to the terminal using some or all of channel measurement resources indicated by the multiple pieces of reference signal configuration information and the reference signal port information included in the reference signal resource configuration information. In this case, the channel measurement resources may correspond to antenna ports, the number of which is indicated by a combination of the multiple pieces of reference signal configuration information and the reference signal port information.

Abstract: A method and user equipment for transmitting a sounding reference signal (SRS) of a user equipment in a wireless communication system are provided. The method includes calculating an SRS transmission count based on at least one of a numerology, an SRS periodicity, a number of SRS symbols, and an SRS repetition factor, and transmitting the SRS based on the SRS transmission count.

Abstract: The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transmission rate beyond a 4G communication system such as LTE. To this end, a base station using a large-scale antenna transmits, to a terminal, reference signal resource configuration information including multiple pieces of reference signal configuration information and reference signal port information, for transmission of a reference signal, and transmits the reference signal to the terminal using some or all of channel measurement resources indicated by the multiple pieces of reference signal configuration information and the reference signal port information included in the reference signal resource configuration information. In this case, the channel measurement resources may correspond to antenna ports, the number of which is indicated by a combination of the multiple pieces of reference signal configuration information and the reference signal port information.

Abstract: The present disclosure relates to a 5G or pre-5G communication system for supporting a data transmission rate higher than a 4G communication system such as LTE. A method proposed in an embodiment of the present disclosure is a method for measuring a channel in a mobile communication system, comprising the: receiving, from a base station, configuration information for measuring a channel by using a reference signal; receiving the reference signal from the base station; measuring the channel by using the reference signal on the basis of the configuration information; and transmitting information on the measured channel to the base station, wherein the configuration information comprises at least one from among information related to time for measuring the channel and information related to a number of ports with respect to the reference signal.

Abstract: Methods and apparatuses are provided in a wireless communication system in which configuration information for at least one subband for the terminal is received from a base station via higher layer signaling. Information indicating an active subband among the at least one subband is received from the base station. The active subband is identified based on the information. Control information or data is received from the base station in the active subband, The at least one subband is within a downlink transmission bandwidth.

Abstract: Methods and apparatuses are provided in a wireless communication system in which DCI is received from a base station and includes a subband indicator indicating a subband among at least one subband configured for the terminal as an active subband and information indicating at least one frequency resource allocated for a PDSCH within the active subband. The active subband is identified based on the subband indicator. The PDSCH is received from the base station in the active subband based on the information. A size of the DCI is configured based on a size of the active subband.

Abstract: A method and a terminal for transmitting a feedback signal by a terminal in a wireless communication system are provided. The method includes receiving, from a base station, a feedback information configuration; receiving, from the base station, a reference signal; estimating a channel between the base station and the terminal based on the reference signal; configuring channel component information associated with separating each of a plurality of channel elements of the channel according to components of the plurality of channel elements; configuring grouping information associated with grouping the plurality of channel elements; and transmitting feedback information including the configured channel component information and the configured grouping information.

Abstract: A signal processing device of a base station being connected to one or more wireless devices of the base station is provided. The signal processing device includes a memory and a processor configured to transmit wireless device setting information to the one or more wireless devices via a front-haul interface during a predetermined time frame, transmit a downlink packet, which is obtained by packetizing downlink baseband data, to the one or more wireless devices via the front-haul interface, receive an uplink packet through the front-haul interface, obtain uplink baseband data and inherent control information by performing uplink packetization on the received uplink packet, and process the uplink baseband data based on analysis of the obtained inherent control information.

Abstract: Disclosed are feedback and transmission devices and methods in full-dimension multi-antenna systems using two-dimensional (2D) planar array antennas, wherein a UE estimates channel states each corresponding to a respective one of multiple domain channels by a reference signal received from a base station, and obtains precoding matrix indicators (PMIs) each corresponding to a respective one of the multiple domain channels and rank indicators (RIs) each corresponding to a respective one of the multiple domain channels based on the estimated channel states. The UE may determine a joint rank indicator (JRI) using the obtained PMIs and the RIs and transmit feedback information containing the determined JRI to the base station.

Abstract: The present disclosure relates to a 5G or pre-5G communication system to be provided for supporting a higher data transfer rate beyond a 4G communication system such as LTE. According to the present disclosure, there is provided a method for supporting repetitive transmission of uplink data by a base station in a mobile communication system operating in a time division duplex (TDD) based cell including at least one subframe for uplink transmission and at least one subframe for downlink transmission comprising repeatedly transmitting uplink data scheduling information in a downlink subframe where an uplink hybrid automatic repeat request (HARQ) process is defined and repeatedly receiving uplink data in uplink subframes which start from an uplink subframe according to an HARQ transmission timing of an HARQ process defined in a downlink subframe where the repetitive transmitting of the uplink data scheduling information is complete.

Abstract: A method and a device for transmitting channel state information in a mobile communication system are disclosed. The method includes the steps of: receiving signal information comprising information indicating a reporting mode for channel status information and information related to a codebook subset configuration for use in reporting the channel status information; determining whether to apply codebook subsampling to a master codebook based on the codebook subset configuration and the reporting mode; upon determining to apply the codebook subsampling to the master codebook, generating a subsampled codebook by subsampling the master codebook and generating the channel status information comprising a PMI generated based on the subsampled codebook; and transmitting the channel status information to a base station.

Abstract: A method for transmitting feedback configuration information by a terminal configured to perform communication through a channel in a wireless communication system is provided. The method includes configuring channel component information for separating each of a plurality of channel elements of the channel according to components of the plurality of channel elements; configuring grouping information for grouping the plurality of channel elements; configuring order sorting information for sorting an order of the plurality of channel elements; configuring probability distribution approximation information for probability distribution approximating the plurality of channel elements; and transmitting the configured channel component information, grouping information, order sorting information, and probability distribution approximation information.

Abstract: Disclosed are a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and a system therefor. The disclosed technique and system can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retailing, security and safety related services, and the like) on the basis of 5G communication technology and IoT related technology.

Abstract: Disclosed is a communication scheme and a system therefor, the communication scheme for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system. The present disclosure can be applied to intelligent services (such as smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail business, security, and safety related services) on the basis of 5G communication technology and IoT related technology.

Abstract: A method for reporting channel state information by a terminal in a multiple access based communication system is provided. The method includes determining a most favored direction with a highest signal quality with respect to a reference signal received from a base station and determining, as a reported object, some channel directions including the most favored direction among channel directions formed together with the base station, identifying a channel quality information group including channel quality information corresponding to the some channel directions among channel quality information groups classified according to a distance measured with respect to the most favored direction, and transmitting the identified channel quality information group to the base station.

Abstract: The present invention relates to a 5G or pre-5G communication system for supporting a higher data transmission rate beyond a 4G communication system such as LTE and, more particularly, to a method and a device for controlling transmission power, the method being performed in a base station of a wireless communication system using multiple antennas. The method for controlling transmission power comprises the step of: transmitting a reference signal at a plurality of vertical angles that differ from each other by means of an antenna arrangement; receiving channel state information, which is related to beamforming of a transmission signal, from a terminal which has received the reference signal and measured a channel state; and transmitting the transmission signal to the terminal by means of transmission power which corresponds to the channel state information.