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

Claim 6:
7. The network side apparatus according to claim 6, wherein before the sending the CSI-RS subjected to beamforming to the terminal on the respective antenna ports associated with the respective transmission layers, the processor is configured to:
receive a sounding reference signal (SRS) sent by the terminal;
calculate uplink channel state information on the basis of the SRS;
determine angle information and delay information of each transmission path of an uplink channel of the terminal on the basis of the uplink channel state information; and
calculate the beams used while sending the CSI-RSs on the respective antenna ports associated with the respective transmission layers on the basis of the angle information and the delay information of the each transmission path of the uplink channel of the terminal.