Abstract: A radio unit (RU) is provided. The RU includes memory storing instructions, one or more transceivers configured to transmit signals or receive signals on a fronthaul interface, and one or more processors. Wherein the instructions cause, when executed by the one or more processors, the RU to receive, from a distributed unit (DU), a control plane (C-plane) message including section information for user equipment (UE) scheduling information and section extension information for a group configuration of multiple ports, wherein the section information including information on a resource region of a section description and a UE identifier, and the section extension information including information on a beam group type, information on the number of one or more ports indicated by the section extension information, and a UE identifier per port, and, in case that a UE identifier of a specified port is set to 0x7FFF in the C-plane message, identify that the resource region is not allocated for the specified port.

Abstract: The disclosure relates to a 5th generation (5G) or pre-5G communication system for supporting a higher data transmission rate than a 4th generation (4G) communication system such as long term evolution (LTE). A method performed by a digital unit (DU) of a base station in a wireless communication system is provided. The method includes configuring, in a first control message, a section extension field including additional information, and transmitting the first control message to a radio unit (RU) of the base station, wherein the first control message includes information on one or more terminals scheduled in the base station.

Abstract: A method for estimating a self-interference channel by a communication device which operates in a full-duplex mode can comprise the steps of: determining the amount of resources to be used for estimating a self-interference channel for each antenna; transmitting a reference signal by means of resources distinguished by means of each antenna in accordance with the amount of resources that has been determined for each antenna; and estimating the self-interference channel on the basis of the reference signal.

Abstract: A method for estimating a self-interference channel by a communication device which operates in a full-duplex mode can comprise the steps of: transmitting a reference signal in a first transmission unit by means of resource elements (REs) of which the number is smaller than the number of antennas of a communication device; estimating a self-interference channel by using a first reference signal matrix, which is returned by means of a self-interference channel in the first transmission unit, and reference signal matrices which are returned by means of a self-interference channel in a predetermined number of transmission units prior to the first transmission unit; and storing information about the estimated self-interference channel.

Abstract: A method for estimating a self-interference channel by a communication device which operates in a full-duplex mode can comprise the steps of: determining the amount of resources to be used for estimating a self-interference channel for each antenna; transmitting a reference signal by means of resources distinguished by means of each antenna in accordance with the amount of resources that has been determined for each antenna; and estimating the self-interference channel on the basis of the reference signal.

Abstract: A method for estimating a self-interference channel by a communication device which operates in a full-duplex mode can comprise the steps of: transmitting a reference signal in a first transmission unit by means of resource elements (REs) of which the number is smaller than the number of antennas of a communication device; estimating a self-interference channel by using a first reference signal matrix, which is returned by means of a self-interference channel in the first transmission unit, and reference signal matrices which are returned by means of a self-interference channel in a predetermined number of transmission units prior to the first transmission unit; and storing information about the estimated self-interference channel.

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: 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: A PSCG feedback-based multi-stream multiuser CQI estimation method and apparatus is provided for estimating multi-stream MU-CQI efficiently based on per-stream channel gain feedback. A feedback information transmission method of a terminal in a wireless communication system according to the present disclosure includes estimating a downlink channel based on a channel state information reference signal transmitted by a base station, determining a number of streams based on the estimated downlink channel, generating the feedback information corresponding to the number of streams, and transmitting the feedback information to the base station.

Abstract: Disclosed are a method and an apparatus for feeding back channel estimation in a MIMO system. A terminal receives a reference signal for estimating a channel from a base station; estimates the channel based on the reference signal; generates channel estimation information according to the channel estimation result and generates error information indicating an error of the channel estimation; and transmits feedback information including the channel estimation information and the error information to the base station.

Abstract: A method and apparatus of exchanging information on the number of layers which is supported commonly between the base station and the terminals in Multi-User Multiple Input Multiple Output (MU-MIMO) environment is provided for performance enhancement. The communication method of a terminal in a wireless communication system according to the present disclosure includes receiving a reference signal and information on a number of layers supportable simultaneously from a base station, measuring a channel state value based on the reference signal and the number of layers, determining whether the measured channel state value fulfills a minimum required channel state value, and transmitting, when the measured channel state value fulfills the minimum required channel state value, a value determined based on the measured channel state value to the base station.

Abstract: Disclosed are a method and an apparatus for feeding back channel estimation in a MIMO system. A terminal receives a reference signal for estimating a channel from a base station; estimates the channel based on the reference signal; generates channel estimation information according to the channel estimation result and generates error information indicating an error of the channel estimation; and transmits feedback information including the channel estimation information and the error information to the base station.

Abstract: A PSCG feedback-based multi-stream multiuser CQI estimation method and apparatus is provided for estimating multi-stream MU-CQI efficiently based on per-stream channel gain feedback. A feedback information transmission method of a terminal in a wireless communication system according to the present disclosure includes estimating a downlink channel based on a channel state information reference signal transmitted by a base station, determining a number of streams based on the estimated downlink channel, generating the feedback information corresponding to the number of streams, and transmitting the feedback information to the base station.

Abstract: A method and apparatus of exchanging information on the number of layers which is supported commonly between the base station and the terminals in Multi-User Multiple Input Multiple Output (MU-MIMO) environment is provided for performance enhancement. The communication method of a terminal in a wireless communication system according to the present disclosure includes receiving a reference signal and information on a number of layers supportable simultaneously from a base station, measuring a channel state value based on the reference signal and the number of layers, determining whether the measured channel state value fulfills a minimum required channel state value, and transmitting, when the measured channel state value fulfills the minimum required channel state value, a value determined based on the measured channel state value to the base station.