US 11,777,683 B2
Method and apparatus for transmitting DMRS
Xiang Ren, Shanghai (CN); Yong Liu, Shanghai (CN); Shibin Ge, Shanghai (CN); and Xiaoyan Bi, Ottawa (CA)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Feb. 7, 2022, as Appl. No. 17/666,318.
Application 17/666,318 is a continuation of application No. 16/566,362, filed on Sep. 10, 2019, granted, now 11,265,127.
Application 16/566,362 is a continuation of application No. PCT/CN2018/080723, filed on Mar. 27, 2018.
Claims priority of application No. 201710214876.X (CN), filed on Apr. 1, 2017.
Prior Publication US 2022/0158797 A1, May 19, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 5/00 (2006.01); H04L 5/02 (2006.01); H04L 5/10 (2006.01)
CPC H04L 5/0051 (2013.01) [H04L 5/0092 (2013.01); H04L 5/023 (2013.01); H04L 5/10 (2013.01)] 48 Claims
OG exemplary drawing
 
1. A method for sending a demodulation reference signal (DMRS), comprising:
determining a time-frequency resource used to carry the DMRS, wherein the DMRS is carried on the time-frequency resource in at least one resource unit, wherein a total quantity of supported DMRS ports is six DMRS ports, the six DMRS ports are divided into three DMRS port groups, each DMRS port group comprises two DMRS ports, the three DMRS port groups comprise a first DMRS port group, a second DMRS port group, and a third DMRS port group, and a same time-frequency resource is multiplexed for the DMRS ports in each DMRS port group in a code division multiplexing (CDM) manner, wherein, in each resource unit, a time-frequency resource to which the first DMRS port group is mapped comprises a subcarrier 0, a subcarrier 1, a subcarrier 6, and a subcarrier 7 that are in a first symbol and a second symbol in a time domain, a time-frequency resource to which the second DMRS port group is mapped comprises a subcarrier 2, a subcarrier 3, a subcarrier 8, and a subcarrier 9 that are in the first symbol and the second symbol in the time domain, and a time-frequency resource to which the third DMRS port group is mapped comprises a subcarrier 4, a subcarrier 5, a subcarrier 10, and a subcarrier 11 that are in the first symbol and the second symbol in the time domain; and
sending the DMRS by using the time-frequency resource.