Patent ID: 11901979
Assignee: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A terminal, comprising:
a memory, configured to store executable instructions; and
a processor, configured to read the executable instructions stored in the memory and execute the following operations:
receiving on respective antenna ports associated with respective transmission layers, a channel state information-reference signal (CSI-RS) subjected to beamforming and sent by a network side, wherein a beam used while receiving the CSI-RS on any one of the antenna ports is obtained according to angle information and delay information determined on the basis of uplink channel state information of the terminal;
selecting K0 antenna ports on the basis of respective received CSI-RSs and calculating a beam combination coefficient set corresponding to the K0 antenna ports on the basis of CSI-RSs received on the K0 antenna ports, wherein K0 is an integer greater than zero; and
reporting information about the K0 antenna ports and the beam combination coefficient set to the network side, wherein the beams used while sending the CSI-RSs on the K0 antenna ports and the beam combination coefficient set are configured for the network side to determine a precoding matrix of downlink transmission of the terminal.