IP Library › Granted Patent US 12701558
Granted Patent B2
US 12701558 · App. 18/496,805 · Granted Aug 4, 2026

Sounding reference signal configuration

Inventors: Haitong Sun (Saratoga, CA); Chunxuan Ye (San Diego, CA); Dawei Zhang (Saratoga, CA); Hong He (San Jose, CA); Jie Cui (San Jose, CA); Seyed Ali Akbar Fakoorian (San Diego, CA); Sigen Ye (San Diego, CA); Wei Zeng (Saratoga, CA); Yushu Zhang (Beijing, CN)
Assignee: Apple Inc.
H04W72/0453H04L5/0048H04L5/0051H04L5/0053H04L5/0094H04W72/231H04L5/0012
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Quick Facts
Patent No.
US 12701558
App. No.
18/496,805
Granted
Aug 4, 2026
Kind
B2
Abstract

Embodiments describe methods, computer-readable media, and apparatuses for configuring, transmitting, and using sounding reference signals.

Claims (43)

1 . One or more non-transitory, computer-readable media having instructions that, when executed, cause processor circuitry to:

receive, from a base station, one or more messages that include sounding reference signal (SRS) configuration information to indicate a partial frequency sounding indicator and a partial frequency sounding offset of an SRS resource allocation, wherein the partial frequency sounding indicator is P F and the partial frequency sounding offset is an integer selected from 0−(P F −1);

determine, based on the partial frequency sounding indicator and the partial frequency sounding offset, a frequency shift;

identify, based on the frequency shift, a group of contiguous resource blocks (RBs) within an SRS bandwidth; and

cause transmission of an SRS using the group of contiguous RBs.

2 . The one or more non-transitory, computer-readable media of claim 1 , wherein the instructions, when executed, further cause the processor circuitry to:

determine, based on the SRS configuration information, a size of the SRS bandwidth;

determine an offset basic unit based on a ratio of the size of the SRS bandwidth to the partial frequency sounding indicator; and

determine, based on the offset basic unit, the frequency shift.

3 . The one or more non-transitory, computer-readable media of claim 1 , wherein the one or more messages comprise radio resource control (RRC) signaling, wherein the RRC signaling includes an SRS-Resource information element to configure the partial frequency sounding indicator and the partial frequency sounding offset.

4 . The one or more non-transitory, computer-readable media of claim 1 , wherein:

the SRS configuration information is to further indicate a number of consecutive SRS symbols for the SRS resource allocation and a repetition factor for the SRS resource allocation; and

the number of consecutive SRS symbols is 6 and the repetition factor is 12, the number of consecutive SRS symbols is 8 and the repetition factor is 8, the number of consecutive SRS symbols is 8 and the repetition factor is 12, or the number of consecutive SRS symbols is 12 and the repetition factor is 12.

5 . The one or more non-transitory, computer-readable media of claim 1 , wherein:

the SRS configuration information is to further indicate a repetition factor to configure frequency hopping of the SRS resource allocation.

6 . The one or more non-transitory, computer-readable media of claim 5 , wherein the repetition factor is 5, 6, 7, 8, 10, 12, or 14.

7 . The one or more non-transitory, computer-readable media of claim 1 , wherein the partial frequency sounding indicator comprises a value of 2, 3, 4, or 8.

8 . A method comprising:

receiving, from a base station, one or more messages that include sounding reference signal (SRS) configuration information to indicate a partial frequency sounding indicator and a partial frequency sounding offset of an SRS resource allocation, wherein the partial frequency sounding indicator is P F and the partial frequency sounding offset is an integer selected from 0−(P F −1);

determining, based on the partial frequency sounding indicator and the partial frequency sounding offset, a frequency shift;

identifying, based on the frequency shift, a group of contiguous resource blocks (RBs) within an SRS bandwidth; and

outputting an SRS for transmission using the group of contiguous RBs.

9 . The method of claim 8 , further comprising:

determining, based on the SRS configuration information, a size of the SRS bandwidth;

determining an offset basic unit based on a ratio of the size of the SRS bandwidth to the partial frequency sounding indicator; and

determining, based on the offset basic unit, the frequency shift.

10 . The method of claim 8 , wherein the one or more messages comprise radio resource control (RRC) signaling, wherein the RRC signaling includes an SRS Resource information element to configure the partial frequency sounding indicator and the partial frequency sounding offset.

11 . The method of claim 8 , wherein:

the SRS configuration information is to further indicate a number of consecutive SRS symbols for the SRS resource allocation and a repetition factor for the SRS resource allocation; and

the number of consecutive SRS symbols is 6 and the repetition factor is 12, the number of consecutive SRS symbols is 8 and the repetition factor is 8, the number of consecutive SRS symbols is 8 and the repetition factor is 12, or the number of consecutive SRS symbols is 12 and the repetition factor is 12.

12 . The method of claim 8 , wherein:

the SRS configuration information is to further indicate a repetition factor to configure frequency hopping of the SRS resource allocation.

13 . The method of claim 12 , wherein the repetition factor is 5, 6, 7, 8, 10, 12, or 14.

14 . The method of claim 8 , wherein the partial frequency sounding indicator comprises a value of 2, 3, 4, or 8.

15 . An apparatus comprising:

interface circuitry; and

processing circuitry, coupled with the interface circuitry, the processing circuitry to:

generate one or more messages that include sounding reference signal (SRS) configuration information to indicate a partial frequency sounding indicator and a partial frequency sounding offset of an SRS resource allocation, wherein the partial frequency sounding indicator is P F and the partial frequency sounding offset is an integer selected from 0−(P F −1); and

cause transmission of the one or more messages to a user equipment.

16 . The apparatus of claim 15 , wherein the one or more messages comprise radio resource control (RRC) signaling, wherein the RRC signaling includes an SRS-Resource information element to configure the partial frequency sounding indicator and the partial frequency sounding offset.

17 . The apparatus of claim 15 , wherein:

the SRS configuration information is to further indicate a number of consecutive SRS symbols for the SRS resource allocation and a repetition factor for the SRS resource allocation; and

the number of consecutive SRS symbols is 6 and the repetition factor is 12, the number of consecutive SRS symbols is 8 and the repetition factor is 8, the number of consecutive SRS symbols is 8 and the repetition factor is 12, or the number of consecutive SRS symbols is 12 and the repetition factor is 12.