The present disclosure relates to a communication technique for converging IoT technology with a 5G communication system for supporting a higher data transmission rate beyond a 4G system, and a system therefor. The present disclosure may be applied to an intelligent service (for example, a smart home, a smart building, a smart city, a smart car or connected car, health care, digital education, retail business, a security and safety-related service, etc.) on the basis of 5G communication technology and IoT-related technology. In addition, the present disclosure relates to a method and device for carrying out cooperative communication in a wireless communication system. A method of a terminal of a communication system, according to one embodiment of the present disclosure, comprises the steps of: receiving, from a base station associated with a first cell, cell configuration information including a TCI configuration and a QCL configuration; checking a QCL reference antenna port on the basis of the cell configuration information; and receiving a signal from the base station on the basis of a QCL relationship with the checked QCL reference antenna port, wherein the QCL reference antenna port may be checked on the basis of a CSI-RS or SSB associated with a second cell.

In a state in which a connection is established between a communication apparatus and a first other communication apparatus while a connection is not established between the communication apparatus and second other communication apparatuses, first information shared by the first other communication apparatus and the second other communication apparatuses in terms of the second other communication apparatuses is received. In a case where the received first information is included in a first field included in a received predetermined frame and indicating a transmission source of the predetermined frame, a data field after the first field of the predetermined frame is read.

In a state in which a connection is established between a communication apparatus and a first other communication apparatus while a connection is not established between the communication apparatus and second other communication apparatuses, first information shared by the first other communication apparatus and the second other communication apparatuses in terms of the second other communication apparatuses is received. In a case where the received first information is included in a first field included in a received predetermined frame and indicating a transmission source of the predetermined frame, a data field after the first field of the predetermined frame is read.

A wireless communication device may receive a configuration of at least one radio resource control (RRC) parameter for X channel measurement reference signal (CMR) resource sets or X CMR resource subsets of CMRs from a corresponding set of CMR resources. The parameter X can be an integer greater than 1. The wireless communication device may measure channel quality for at least one CMR resource of the X CMR resource sets or the X CMR resource subsets according to the configuration. The wireless communication device may send a report including at least one of a CMR index or channel quality to the wireless communication node. The report may include at least one of: a CMR index, or a channel quality.

A method of operating a distributed MIMO system is disclosed. The distributed MIMO system is configured to serve a plurality of wireless communication devices (u.sub.1, . . . , u.sub.N). The distributed MIMO system comprises a number of access points (A.sub.1, . . . , A.sub.K), each comprising a time circuit (180) configured to keep track of a local time of the access point (A.sub.1, . . . , A.sub.K). The method comprises performing (210) an intra-group synchronization procedure for a group (G.sub.1) of at least three access points (A.sub.1-A.sub.3). The intra-group synchronization procedure comprises, for each access point (A.sub.i) in the group (G.sub.1), transmitting (T.sub.i), from that access point (A.sub.i), a synchronization signal and obtaining (O.sub.i) a transmission time indicator indicating a transmission time of that synchronization signal in the local time of that access point (A.sub.i). Furthermore, the intra-group synchronization procedure comprises receiving (R.sub.im, R.sub.in), by each of the other access points (A.sub.m, A.sub.n) in the group, the synchronization signal and obtaining (O.sub.im, O.sub.in) reception time indicators indicating reception times, in the local times of the other access points (A.sub.m, A.sub.n), when the synchronization signal was received by the other access points (A.sub.m, A.sub.n) in the group.

A method of operating a distributed MIMO system is disclosed. The distributed MIMO system is configured to serve a plurality of wireless communication devices (u.sub.1, . . . , u.sub.N). The distributed MIMO system comprises a number of access points (A.sub.1, . . . , A.sub.K), each comprising a time circuit (180) configured to keep track of a local time of the access point (A.sub.1, . . . , A.sub.K). The method comprises performing (210) an intra-group synchronization procedure for a group (G.sub.1) of at least three access points (A.sub.1-A.sub.3). The intra-group synchronization procedure comprises, for each access point (A.sub.i) in the group (G.sub.1), transmitting (T.sub.i), from that access point (A.sub.i), a synchronization signal and obtaining (O.sub.i) a transmission time indicator indicating a transmission time of that synchronization signal in the local time of that access point (A.sub.i). Furthermore, the intra-group synchronization procedure comprises receiving (R.sub.im, R.sub.in), by each of the other access points (A.sub.m, A.sub.n) in the group, the synchronization signal and obtaining (O.sub.im, O.sub.in) reception time indicators indicating reception times, in the local times of the other access points (A.sub.m, A.sub.n), when the synchronization signal was received by the other access points (A.sub.m, A.sub.n) in the group.

A system includes one or more antennas; and a processor to control a directionality of the antennas in communication with a predetermined target using 5G protocols.

Methods, systems, and devices for wireless communications are described. In some systems, a network may schedule a user equipment (UE) for multiple transmission/reception point (TRP) communication. The network may transmit a single downlink control information (DCI) message to the UE to dynamically configure multiple transmission configuration indicator (TCI) states for the multiple TRPs. In a first example, the DCI message may include a bit field indicating a set of antenna ports and the multi-TRP scheme for transmission. In a second example, the DCI message may include a separate field indicating the multi-TRP scheme (e.g., based on UE capabilities). In a third example, the DCI may indicate redundancy versions (RVs) for different TRPs in an RV field or across multiple fields. In a fourth example, the DCI may include an indication of a precoding resource block group (PRG) size that may be interpreted differently based on the indicated multi-TRP scheme.

Methods, systems, and devices for wireless communications are described. A base station may determine a transmission beam configuration for transmitting multicast data to a user equipment (UE) in a joint transmission using a set of transmission/reception points (TRPs) based on outcomes of listen before talk (LBT) procedures performed at the TRPs. In some examples, the base station may indicate to the UE that the UE is to determine a UE beam configuration and a quasi co-location (QCL) relationship associated with the TRPs for receiving the multicast data based on signaling from the TRPs. In some examples, the base station may transmit multicast data from a first TRP (e.g., a serving cell) during a first transmission opportunity (TxOP), and the UE may determine the QCL relationship for the set of TRPs. During a second TxOP, the base station may transmit multicast data in a joint transmission from the set of TRPs.

A method of a user equipment (UE) in a wireless communication system is provided. The method comprises receiving, from at least one transmission and reception point (TRP) of a group of (N) TRPs, channel status information (CSI) configuration information, determining a CSI report based on the CSI configuration information, identifying, based on the configuration information, one or more TRPs of the group of (N) TRPs to transmit the determined CSI report, and transmitting, to the one or more TRPs, the determined CSI report over an uplink channel. The determined CSI report includes a TRP indicator for selecting (M) TRPs of the group of (N) TRPs, and CSI for each of the selected (M) TRPs, wherein N is greater than one, and wherein M is greater or equal to 1, and less or equal to N.