US 12,413,357 B2
Uplink reference signal transmission method, user terminal, and base station
Jiafeng Shao, Beijing (CN); and Sha Ma, Beijing (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Jul. 1, 2020, as Appl. No. 16/918,190.
Application 16/918,190 is a continuation of application No. 15/894,070, filed on Feb. 12, 2018, granted, now 10,735,159.
Application 15/894,070 is a continuation of application No. PCT/CN2015/086842, filed on Aug. 13, 2015.
Prior Publication US 2020/0336266 A1, Oct. 22, 2020
Int. Cl. H04L 5/00 (2006.01); H04L 5/14 (2006.01); H04W 72/04 (2023.01)
CPC H04L 5/0048 (2013.01) [H04L 5/0051 (2013.01); H04W 72/04 (2013.01); H04L 5/0094 (2013.01); H04L 5/1469 (2013.01)] 28 Claims
OG exemplary drawing
 
1. An uplink reference signal transmission method, comprising:
receiving first higher layer signaling indicating a plurality of uplink reference signal symbol groups and a plurality of uplink reference signal subcarrier groups, wherein the plurality of uplink reference signal symbol groups is in 14 symbols or 12 symbols, and wherein each uplink reference signal symbol group of the plurality of uplink reference signal symbol groups comprises at least one time unit, and wherein each uplink reference signal subcarrier group of the plurality of uplink reference signal subcarrier groups comprises at least 12 uplink subcarriers;
receiving first control information via a physical channel, wherein the first control information comprises first indication information indicating an uplink reference signal symbol group, and wherein the first control information further comprises second indication information indicating an uplink reference signal subcarrier group;
determining based on the first indication information indicating the uplink reference signal symbol group, a first uplink reference signal symbol group from the plurality of uplink reference signal symbol groups indicated by the first higher layer signaling; and determining, based on the second indication information indicating the uplink reference signal subcarrier group, a first uplink reference signal subcarrier group from the plurality of uplink reference signal subcarrier groups indicated by the first higher layer signaling; and
sending an uplink reference signal in a time unit of the first uplink reference signal symbol group and a subcarrier of the first uplink reference signal subcarrier group, wherein the uplink reference signal is a demodulation reference signal (DMRS) or a sounding reference signal (SRS).