Granted Patent B2

US 12,574,181 · App. 18/199,460 · Granted Mar 10, 2026

Inventors: Haitong Sun (Cupertino, CA); Seyed Ali Akbar Fakoorian (San Diego, CA); Chunxuan Ye (San Diego, CA); Dawei Zhang (Saratoga, CA); Oghenekome Oteri (San Diego, CA); Jie Cui (San Jose, CA); Wei Zeng (Saratoga, CA); Hong He (San Jose, CA); Ankit Bhamri (Bad Nauheim, DE)

Assignee: Apple Inc.

H04L5/0051H04W76/20

Abstract

Claims (61)

1 . A user equipment (UE), comprising:

a transceiver configured to enable wireless communication with a base station; and

a processor communicatively coupled to the transceiver and configured to:

determine a comb offset for each of a plurality of Sounding Reference Signal (SRS) transmission occasions for the UE, wherein the comb offset changes between each SRS transmission occasion of the plurality of SRS transmission occasions, and

wherein:

the comb offset for the each SRS transmission occasion is determined as CombOffset(k)=mod (CombOffset+F(mod (k,COMB),COMB),

k is a non-negative integer indicating the SRS transmission occasion,

COMB is a Radio Resource Control (RRC) configured comb size configuration,

mod is a modulo operation,

CombOffset is a RRC configured comb offset,

F is an offset applied to the RRC configured comb offset, and

CombOffset(k) is the comb offset for the SRS transmission occasion k;

generate a first SRS for a first SRS transmission occasion of the plurality of SRS transmission occasions using the determined comb offset corresponding to the first SRS transmission occasion; and

transmit, using the transceiver, the first SRS to the base station.

2 . The UE of claim 1 , wherein the offset applied to the RRC configured comb offset includes one or more of sequences including:

{0, 1} for the RRC configured comb size configuration of comb 2 configuration,

{0, 3, 2, 1}, {0, 1, 2, 3}, or {0, 2, 1, 3} for the RRC configured comb size configuration of comb 4 configuration, and

{0, 1, 2, 3, 4, 5, 6, 7}, {0, 3, 6, 1, 4, 7, 2, 5}, {0, 5, 2, 7, 4, 1, 6, 3}, {0, 7, 6, 5, 4, 3, 2, 1}, or {0, 4, 2, 6, 1, 5, 3, 7} for the RRC configured comb size configuration of comb 8 configuration.

3 . The UE of claim 1 , wherein the processor is configured to determine the comb offset for the each SRS transmission occasion a number of times within a slot.

4 . The UE of claim 3 , wherein the number of times is determined by a number of symbols used for SRS transmission divided by a repetition factor.

5 . The UE of claim 4 , wherein the processor is configured to determine the number of symbols used for the SRS transmission and the repetition factor from a RRC message from the base station.

6 . The UE of claim 1 , wherein the processor is configured to determine the comb offset for each SRS transmission occasion once in a slot.

7 . The UE of claim 1 , wherein the processor is configured to determine the comb offset for each SRS transmission occasion when the plurality of SRS transmission occasions share a same frequency location.

8 . The UE of claim 1 , wherein the processor is configured to determine the comb offset for each SRS transmission occasion when the plurality of SRS transmission occasions have different frequency locations.

9 . A method, comprising:

determining, by a user equipment (UE), a comb offset for each of a plurality of Sounding Reference Signal (SRS) transmission occasions for the UE, wherein the comb offset changes between each SRS transmission occasion of the plurality of SRS transmission occasions, and wherein:

the comb offset for the each SRS transmission occasion is determined as CombOffset(k)=mod (CombOffset+F(mod (k,COMB),COMB),

k is a non-negative integer indicating the SRS transmission occasion,

COMB is a Radio Resource Control (RRC) configured comb size configuration,

mod is a modulo operation,

CombOffset is a RRC configured comb offset,

F is an offset applied to the RRC configured comb offset, and

CombOffset(k) is the comb offset for the SRS transmission occasion k;

generating, by the UE, a first SRS for a first SRS transmission occasion of the plurality of SRS transmission occasions using the determined comb offset corresponding to the first SRS transmission occasion; and

transmitting, by the UE, the first SRS to a base station.

10 . The method of claim 9 , wherein the offset applied to the RRC configured comb offset includes one or more of sequences including:

{0, 1} for the RRC configured comb size configuration of comb 2 configuration,

{0, 3, 2, 1}, {0, 1, 2, 3}, or {0, 2, 1, 3} for the RRC configured comb size configuration of comb 4 configuration, and

{0, 1, 2, 3, 4, 5, 6, 7}, {0, 3, 6, 1, 4, 7, 2, 5}, {0, 5, 2, 7, 4, 1, 6, 3}, {0, 7, 6, 5, 4, 3, 2, 1}, or {0, 4, 2, 6, 1, 5, 3, 7} for the RRC configured comb size configuration of comb 8 configuration.

11 . The method of claim 9 , further comprising determining the comb offset for the each SRS transmission occasion a number of times within a slot.

12 . The method of claim 11 , further comprising determining the number of times by dividing a number of symbols used for SRS transmission by a repetition factor.

13 . The method of claim 12 , further comprising determining the number of symbols used for the SRS transmission and the repetition factor from a RRC message received from the base station.

14 . The method of claim 9 , further comprising determining the comb offset for each SRS transmission occasion once in a slot.

15 . The method of claim 9 , further comprising determining the comb offset for each SRS transmission occasion when the different plurality of SRS transmission occasions share a same frequency location.

16 . The method of claim 9 , further comprising determining the comb offset for each SRS transmission occasion when the different plurality of SRS transmission occasions have different frequency locations.

17 . A non-transitory computer-readable medium storing instructions that when executed by a processor of a user equipment (UE), the instructions cause the processor to perform operations comprising:

determining a comb offset for each of a plurality of Sounding Reference Signal (SRS) transmission occasions for the UE, wherein the comb offset changes between each SRS transmission occasion of the plurality of SRS transmission occasions, and wherein:

the comb offset for the each SRS transmission occasion is determined as CombOffset(k)=mod (CombOffset+F(mod (k,COMB),COMB),

k is a non-negative integer indicating the SRS transmission occasion,

COMB is a Radio Resource Control (RRC) configured comb size configuration,

mod is a modulo operation,

CombOffset is a RRC configured comb offset,

F is an offset applied to the RRC configured comb offset, and

CombOffset(k) is the comb offset for the SRS transmission occasion k;

generating a first SRS for a first SRS transmission occasion of the plurality of SRS transmission occasions using the determined comb offset corresponding to the first transmission occasion; and

transmitting the first SRS to a base station.

18 . The non-transitory computer-readable medium of claim 17 , the operations further comprising determining the comb offset for each SRS transmission occasion a number of times within a slot by dividing a number of symbols used for SRS transmission by a repetition factor, wherein the number of symbols for the SRS transmission and the repetition factor are received in a RRC message from the base station.

19 . The non-transitory computer-readable medium of claim 17 , wherein the offset applied to the RRC configured comb offset includes one or more of sequences including:

{0, 1} for the RRC configured comb size configuration of comb 2 configuration,

{0, 3, 2, 1}, {0, 1, 2, 3}, or {0, 2, 1, 3} for the RRC configured comb size configuration of comb 4 configuration, and

{0, 1, 2, 3, 4, 5, 6, 7}, {0, 3, 6, 1, 4, 7, 2, 5}, {0, 5, 2, 7, 4, 1, 6, 3}, {0, 7, 6, 5, 4, 3, 2, 1}, or {0, 4, 2, 6, 1, 5, 3, 7} for the RRC configured comb size configuration of comb 8 configuration.

Assignments (1)

Continuity (2)

References Cited (44)