US 12,256,374 B2
Methods and apparatuses for SRS configuration and transmission
Bingchao Liu, Beijing (CN); Chenxi Zhu, Beijing (CN); and Wei Ling, Beijing (CN)
Assigned to Lenovo (Beijing) Limited, Beijing (CN)
Appl. No. 17/610,817
Filed by LENOVO (BEIJING) LIMITED, Beijing (CN)
PCT Filed May 13, 2019, PCT No. PCT/CN2019/086645
§ 371(c)(1), (2) Date Nov. 12, 2021,
PCT Pub. No. WO2020/227889, PCT Pub. Date Nov. 19, 2020.
Prior Publication US 2022/0210803 A1, Jun. 30, 2022
Int. Cl. H04W 72/1263 (2023.01); H04L 5/00 (2006.01); H04L 27/26 (2006.01); H04W 72/0446 (2023.01); H04W 72/23 (2023.01)
CPC H04W 72/1263 (2013.01) [H04L 5/0012 (2013.01); H04L 27/2607 (2013.01); H04W 72/0446 (2013.01); H04W 72/23 (2023.01)] 17 Claims
OG exemplary drawing
 
1. A method at a base station, the method comprising:
configuring one or more higher layer parameter sets for additional sounding reference signal (SRS) transmission with at least one of frequency hopping, repetition, and antenna switching; and
transmitting a downlink control information (DCI) containing a non-zero SRS request field or a higher layer signaling to trigger a SRS transmission in symbols in one or more normal subframes, wherein one of the parameter sets contains, for one aperiodic SRS transmission, 2 hops intra-subframe frequency hopping, with Ns=4 and R=2, or Ns=6 and R=3 or Ns=8 and R=4, each hop has the same bandwidth and each of antenna ports used for transmitting SRS is mapped to the same set of subcarriers, wherein Ns is a number of SRS symbols configured for transmitting SRS and R is repetition factor, and wherein, in response to no guard period being configured, a start symbol of the SRS transmission is configured as one of {0,1,2,3,4,5,6,7,8,9,10} corresponding to Ns=4, or one of {0,1,2,3,4,5,6,7,8} corresponding to Ns=6, or one of {0,1,2,3,4,5,6} corresponding to Ns=8.