Patent ID: 11863489
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A base station in a communication system, the base station comprising:
a transceiver; and
a controller configured to:
transmit, to a terminal, an activation command of transmission configuration indication (TCI) states,
transmit, to the terminal, downlink control information (DCI) including an antenna port field and a TCI field, wherein the TCI field indicates one of codepoints,
identify a demodulation reference signal (DMRS) port based on a first antenna port indication table and the antenna port field, in response to at least one codepoint of the TCI field mapped being mapped to two TCI states according to the activation command, and
transmit, to the terminal, a physical downlink shared channel (PDSCH) based on the DMRS port,

wherein, in case that the TCI field indicates a codepoint mapped to two TCI states and the antenna port field indicates DMRS ports within two code division multiplexing (CDM) groups, a first TCI state corresponds to a first CDM group and a second TCI state corresponds to a second CDM group.