US 12,407,397 B2
Multi-TRP transmission
Yukai Gao, Beijing (CN); and Gang Wang, Beijing (CN)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/277,167
Filed by NEC CORPORATION, Tokyo (JP)
PCT Filed Sep. 18, 2018, PCT No. PCT/CN2018/106257
§ 371(c)(1), (2) Date Mar. 17, 2021,
PCT Pub. No. WO2020/056591, PCT Pub. Date Mar. 26, 2020.
Prior Publication US 2024/0259078 A1, Aug. 1, 2024
Int. Cl. H04B 7/06 (2006.01); H04L 5/00 (2006.01); H04W 72/232 (2023.01)
CPC H04B 7/06968 (2023.05) [H04L 5/0048 (2013.01); H04W 72/232 (2023.01)] 18 Claims
OG exemplary drawing
 
1. A method performed by a terminal device, the method comprising:
receiving a Medium Access Control (MAC) Control Element (CE) activation command indicating at least one transmission configuration indication (TCI) state identifier (ID) with each TCI state ID indicating a first TCI state and a second TCI state;
receiving downlink control information (DCI) indicating the first TCI state and the second TCI state and a first value, a second value or a third value,
wherein, in response to the first value being received, the first value indicates that there is 1 demodulation reference signal (DMRS) port in a first code domain multiplexing (CDM) group and there are 2 DMRS ports in a second CDM group, 1 DMRS port in the first CDM group corresponds to the first TCI state, and 2 DMRS ports in the second CDM group correspond to the second TCI state,
wherein, in response to the second value being received, the second value indicates that there are 2 DMRS ports in the first CDM group and there is 1 DMRS port in the second CDM group, 2 DMRS ports in the first CDM group correspond to the first TCI state, and 1 DMRS port in the second CDM group corresponds to the second TCI state, and
wherein, in response to the third value being received, the third value indicates that there is one CDM group and one of the first TCI state and the second TCI state is applied to one physical downlink shared channel (PDSCH) transmission; and
receiving a DMRS based on the DCI.