US 12,004,148 B2
Transmission configuration indication method of DMRS port and related apparatus, and storage medium
Xin Su, Beijing (CN); Qiubin Gao, Beijing (CN); Runhua Chen, Beijing (CN); and Mengjun Wang, Beijing (CN)
Assigned to DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
Appl. No. 17/600,608
Filed by DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
PCT Filed Feb. 7, 2020, PCT No. PCT/CN2020/074552
§ 371(c)(1), (2) Date Oct. 1, 2021,
PCT Pub. No. WO2020/199752, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 201910272864.1 (CN), filed on Apr. 4, 2019.
Prior Publication US 2022/0201712 A1, Jun. 23, 2022
Int. Cl. H04W 72/1263 (2023.01); H04L 5/00 (2006.01); H04L 27/26 (2006.01); H04W 72/23 (2023.01)
CPC H04W 72/1263 (2013.01) [H04L 5/0051 (2013.01); H04L 27/2613 (2013.01); H04W 72/23 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A transmission configuration indication method of a demodulation reference signal (DMRS) port, comprising:
configuring, by a network side device, at least two DMRS ports for a terminal according to a required mapping relationship between transmission configuration indication state information (TCI states) and DMRS code division multiplexing (CDM) groups, wherein the at least two DMRS ports belong to different DMRS CDM groups, and the different DMRS CDM groups comprise different quantities of DMRS ports; and
sending, by the network side device, downlink control information (DCI) to the terminal, wherein the DCI comprises DMRS port index values, the DMRS port index values are index values pre-defined in a DMRS port allocation table, and the DMRS port index values are used to indicate a set of the at least two DMRS ports configured to the terminal, a number of DMRS CDM groups without data, and a number of front-load DMRS symbols, and are used to indicate the mapping relationship between the TCI states and the DMRS CDM groups.