	US 11,973,578 B2
	Reference signal configuration method and apparatus, and sequence configuration method and apparatus
Yong Liu, Shanghai (CN); Mingxin Gong, Tianjin (CN); Bingyu Qu, Beijing (CN); Yongxing Zhou, Beijing (CN); Xiaoyan Bi, Shanghai (CN); Lu Rong, Shenzhen (CN); and Su Huang, Shanghai (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Mar. 11, 2021, as Appl. No. 17/199,050.
Application 17/199,050 is a continuation of application No. PCT/CN2019/102057, filed on Aug. 22, 2019.
Claims priority of application No. 201811084471.X (CN), filed on Sep. 14, 2018; application No. 201811146964.1 (CN), filed on Sep. 28, 2018; and application No. 201811186140.7 (CN), filed on Oct. 11, 2018.
Prior Publication US 2021/0203551 A1, Jul. 1, 2021
Int. Cl. H04J 13/18 (2011.01); H04L 5/00 (2006.01); H04L 27/26 (2006.01); H04L 41/0806 (2022.01); H04W 72/51 (2023.01)

CPC H04J 13/18 (2013.01) [H04L 5/0048 (2013.01); H04L 27/262 (2013.01); H04L 41/0806 (2013.01); H04W 72/51 (2023.01)]

38 Claims

1. A method comprising:

generating at least two demodulation reference signals (DMRSs) corresponding to a terminal device, wherein the at least two DMRSs comprise a first DMRS and a second DMRS that are mapped to same one or more time domain symbols, wherein a first sequence of the first DMRS and a second sequence of the second DMRS satisfy c_{init_m}=ƒ(n_{CDM_m}), wherein ƒ(n_{CDM_m}) represents a function of n_{CDM_m}, wherein for the first sequence, n_{CDM_m}represents an index of a code division multiplexing (CDM) group to which an antenna port of the terminal device used for the first DMRS belongs, wherein for the second sequence, n_{CDM_m}represents an index of a CDM group to which an antenna port of the terminal device used for the second DMRS belongs, and wherein c_{init_m}represents an initialization factor of a sequence corresponding to the CDM group; and

transmitting the at least two DMRSs.