US 12,149,383 B2
SRS sending method, SRS receiving method, and device
Ruiqi Zhang, Beijing (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Jun. 7, 2021, as Appl. No. 17/340,975.
Application 17/340,975 is a continuation of application No. PCT/CN2018/119891, filed on Dec. 7, 2018.
Prior Publication US 2021/0306184 A1, Sep. 30, 2021
Int. Cl. H04L 25/02 (2006.01); H04L 5/00 (2006.01)
CPC H04L 25/0226 (2013.01) [H04L 5/0012 (2013.01); H04L 5/0051 (2013.01); H04L 5/0092 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A sounding reference signal (SRS) sending method, comprising:
receiving, by a terminal device, configuration information from a network device, wherein the configuration information indicates to the terminal device that frequency hopping is performed within P subbands, and P is a positive integer:
sending, by the terminal device, an SRS to the network device in a frequency hopping manner within the P subbands, wherein the terminal device traverses the P subbands and a plurality of transmit antennas of the terminal device while sending the SRS in P first time units; and
determining, by the terminal device, an index of a transmit antenna for sending the SRS in the P first time units based on a formula comprising a(nSRS_ant)=nSRS_ant mod Λ, wherein a(nSRS_ant) represents the index of the transmit antenna sending the SRS, nSRS_ant is equal to └n′SRS/Ma┘, Ma is a quantity of first time units that are consecutively used for sending the SRS in one subframe by a particular transmit antenna, n′SRS is a first index of a first time unit for sending the SRS, mod represents a modulo operation, and Λ is a parameter that is dependent on a number of antennas included in the terminal device,
wherein n′SRS satisfies the following formula:

OG Complex Work Unit Math
wherein TSRS represents an SRS transmission periodicity configured by the network device for the terminal device, Toffset represents a position of a subframe that is for sending the SRS in the SRS transmission periodicity TSRS configured by the network device for the terminal device, NSP represents a quantity of downlink-to-uplink switching points in a radio frame in which the SRS is located, nf represents a frame number of a radio frame in which the SRS is located, ns represents a slot number in the radio frame in which the SRS is located, ns=0, 1, . . . , 19, MSRS represents a quantity of first time units that are allocated to the terminal device to transmit the SRS in one subframe, m represents an index of a first time unit that is allocated to the terminal device to transmit the SRS in one subframe, and m=0, 1, . . . , MSRS−1, and wherein case (1) corresponds with a frame structure type 2 with an SRS transmission periodicity of 2 ms.