US 12,301,518 B2
Demodulation reference signal indicating and receiving methods, transmit end, and receive end
Xiang Ren, Shanghai (CN); Yong Liu, Shanghai (CN); and Lu Rong, Shenzhen (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Jul. 28, 2022, as Appl. No. 17/876,301.
Application 17/876,301 is a continuation of application No. 16/917,139, filed on Jun. 30, 2020, granted, now 11,424,898.
Application 16/917,139 is a continuation of application No. 16/517,198, filed on Jul. 19, 2019, granted, now 10,715,300, issued on Jul. 14, 2020.
Application 16/517,198 is a continuation of application No. PCT/CN2018/096201, filed on Jul. 19, 2018.
Claims priority of application No. 201710686645.9 (CN), filed on Aug. 11, 2017; and application No. 201711147995.4 (CN), filed on Nov. 17, 2017.
Prior Publication US 2023/0030162 A1, Feb. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 5/10 (2006.01); H04L 5/00 (2006.01); H04L 5/02 (2006.01); H04W 76/27 (2018.01)
CPC H04L 5/10 (2013.01) [H04L 5/0051 (2013.01); H04L 5/026 (2013.01); H04W 76/27 (2018.02)] 12 Claims
OG exemplary drawing
 
1. A demodulation reference signal (DMRS) indicating method comprising:
obtaining, by a transmit end, DMRS indication information based on DMRS configuration information, wherein the DMRS indication information indicates code division multiplexing (CDM) group information of an antenna port, and wherein the CDM group information comprises a number of CDM groups; and
sending, by the transmit end, the DMRS indication information;
wherein frequency division multiplexing (FDM) is performed, for a 2-symbol DMRS type 2 and in accordance with single-user (SU) scheduling being performed by using the DMRS configuration information, in a CDM group 1 and a CDM group 2;
wherein in the DMRS configuration information, specific DMRS port mapping rules of a DMRS type 2 are applied as follows:
ports comprised in the CDM group 1 are {0, 1, 6, 7},
ports comprised in the CDM group 2 are {2, 3, 8, 9}, and
ports comprised in a CDM group 3 are {4, 5, 10, 11}; and
wherein the frequency division multiplexing (FDM) is performed in the CDM group 1 and the CDM group 2 as follows:
in accordance with a value of the number of CDM groups being 2 and six transmission layers or six DMRS ports being scheduled, FDM multiplexing is performed as follows:
in DMRS ports 0, 1, 6, and 7 corresponding to the CDM group 1, the DMRS ports 0, 1, and 6 are scheduled; and
in DMRS ports 2, 3, 8, and 9 corresponding to the CDM group 2, the DMRS ports 2, 3, and 8 are scheduled; or
in accordance with a value of the number of CDM groups being 2 and eight transmission layers or eight DMRS ports being scheduled, FDM multiplexing is performed as follows:
in DMRS ports 0, 1, 6, and 7 corresponding to the CDM group 1, the DMRS ports 0, 1, 6, and 7 are scheduled; and
in DMRS ports 2, 3, 8, and 9 corresponding to the CDM group 2, the DMRS ports 2, 3, 8, and 9 are scheduled.