Patent ID: 11882071
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A reference signal sending method, comprising:
determining an initial seed parameter of a pseudo-random sequence, and generating the pseudo-random sequence based on the initial seed parameter, wherein the initial seed parameter is determined based on attribute information of a terminal device;
determining a cyclic shift value α based on the pseudo-random sequence, and determining a reference signal based on the cyclic shift value α; and
sending the reference signal to a network device, wherein the cyclic shift value α determined based on the pseudo-random sequence meets one of the following formula:
α=2π/Z ((αint+nCS (ns, fμ, l))mod Z), wherein
nCS (ns, fμ, l)=Σm=0T−12mc(T·Nsymbslotns, fμ+T·l+m), wherein m=0, 1, 2, . . . , T−1; ns, fμ is a slot number, in a current system frame, of a slot in which the reference signal is sent; Nsymbslot is a quantity of orthogonal frequency division multiplexing (OFDM) symbols in one slot; l is a symbol number, in a current slot, of a symbol in which the reference signal is sent, and 0≤l≤Nsymbslot−1, wherein l=0 corresponds to a first symbol in the current slot; Z is a positive integer; αinit is a predefined initial cyclic shift value or an initial cyclic shift value configured by the network device; T is a positive integer; and c(•) is the pseudo-random sequence;
α=2π/Z ((αint+nCS (nSRS))mod Z), wherein
ncs(nSRS)=Σm=0T−12mc(TnSRS+m), where m=0, 1, 2, . . . , T−1; nSRS is a counting value of a reference signal counter; Z is a positive integer; αinit is a predefined initial cyclic shift value or an initial cyclic shift value configured by the network device; T is a positive integer; and c(•) is the pseudo-random sequence;
α=2π/Z ((αint+nCS (Nslotframe, μ, nf, ns, fμ, L, TSRS))mod Z), wherein
nCS (Nslotframe,μ, nf, ns, fμ, L, TSRS)=Σm=0T−12mc(T└Nslotframe, μnf+ns, fμ−L/TSRS┘+m), wherein m=0, 1, 2, . . . , T−1; ns, fμ is a slot number, in a current system frame, of a slot in which the reference signal is sent; nf is a system frame number; Nslotframe, μ is a quantity pf slots in each system frame; TSRS is a reference signal sending cycle; L is an integer; Z is a positive integer; αinit is a predefined initial cyclic shift value or an initial cyclic shift value configured by the network device; T is a positive integer; and c(•) is the pseudo-random sequence; or
α=2π/Z ((αint+nCS (Nslotframe, μ, nf, ns, fμ, l))mod Z), wherein
nCS (Nslotframe, μ, nf, ns, fμ, l)=Σm=0T−12mc(TS(Nslotframe, μnf+ns, fμ)+Tl+m), wherein m=0, 1, 2, . . . , T−1; ns, fμ is a slot number, in a current system frame, of a slot in which the reference signal is sent; nf is a system frame number; Nslotframe, μ is a quantity of slots in each system frame; l is a symbol number, in a current slot, of a symbol in which the reference signal is sent, and 0≤l≤Nsymbslot−1, wherein l=0 corresponds to a first symbol in the current slot; Z is a positive integer; αinit is a predefined initial cyclic shift value or an initial cyclic shift value configured by the network device; T is a positive integer; S is a positive integer; c(•) is the pseudo-random sequence.