Method and device for sounding reference signal indication enhancement

Inventors: Chuangxin Jiang (Shenzhen, CN); Hao Wu (Shenzhen, CN); Zhaohua Lu (Shenzhen, CN); Yuxin Wang (Shenzhen, CN); Shujuan Zhang (Shenzhen, CN); Bo Gao (Shenzhen, CN); Yu Pan (Shenzhen, CN); Ke Yao (Shenzhen, CN)

Assignee: ZTE Corporation

H04L5/0051 H04W72/23 H04W72/569

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Quick Facts

Patent No.: US 12671543
App. No.: 17/869,983
Granted: Jun 30, 2026
Kind: B2

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Abstract

Presented are systems and methods for sounding reference signal (SRS) indication enhancement. A wireless communication device may determine to perform a first sounding reference signal (SRS) transmission in a first component carrier (CC). The wireless communication device may determine to perform the first SRS in an available time unit according to a time offset and a second SRS transmission in a second CC. A wireless communication device may receive one or more lists of carrier indicator (CIF) values for SRS transmissions from a wireless communication node. The wireless communication device may determine a first SRS transmission according to the one or more lists of CIF values. The wireless communication device may determine a first SRS transmission according to a value of a CIF field in a downlink control information (DCI).

Claims (37)

1 . A method comprising:

identifying, by a wireless communication device, a priority rule that is predetermined or is configured via higher layer signaling, to prioritize a plurality of sounding reference signal (SRS) transmissions in at least a first component carrier (CC) and a second CC, wherein the priority rule operates according to a CC index of at least one of the first CC or the second CC;

determining, by the wireless communication device, according to a time offset and a second SRS transmission in the second CC, to perform a first SRS transmission in a first CC in an available time unit, the second SRS transmission overlapping with the first SRS transmission in time domain, wherein the second SRS transmission has a higher priority than the first SRS transmission, and the wireless communication device is incapable of simultaneously supporting the first SRS transmission and the second SRS transmission; and

performing, by the wireless communication device, the first SRS transmission in the first CC in the available time unit.

2 . The method of claim 1 , wherein the second SRS transmission is of semi-persistent or periodic type.

3 . The method of claim 1 , wherein the higher layer signaling comprises radio resource control (RRC) signaling or medium access control (MAC) layer signaling.

4 . The method of claim 1 , wherein the available time unit excludes an instance where the second SRS transmission overlaps with the first SRS transmission in a same symbol.

5 . The method of claim 1 , comprising:

determining, by the wireless communication device, to perform the first SRS transmission in a next available time unit, if the first SRS transmission would overlap in time with the second SRS transmission if performed in the available time unit.

6 . The method of claim 1 , comprising:

determining, by the wireless communication device, to drop or bypass the first SRS transmission, if the first SRS transmission would overlap in time with the second SRS transmission if performed in the available time unit.

7 . The method of claim 1 , wherein the wireless communication device is incapable of simultaneously supporting two beams for the first SRS transmission and the second SRS transmission respectively.

8 . A method comprising:

receiving, by a wireless communication device from a wireless communication node, one or more lists of carrier indicator (CIF) values for sounding reference signal (SRS) transmissions, the one or more lists of CIF values including a first list of CIF values that is used for SRS transmissions for a positioning purpose, and a second list of CIF values that is used for SRS transmissions for a non-positioning purpose;

determining, by the wireless communication device, a first SRS transmission according to the one or more lists of CIF values, and according to a value of a CIF field in a downlink control information (DCI); and

performing, by the wireless communication device, the first SRS transmission in a first component carrier (CC) mapped to the value of the CIF field.

9 . The method of claim 8 , wherein each of the one or more lists of CIF values is configured corresponding to a respective SRS resource or resource set, or a respective SRS configuration (SRS-Config).

10 . The method of claim 8 , comprising:

transmitting, by the wireless communication device, using a first SRS resource or resource set for the first SRS transmission, when a CIF value indicated by the DCI matches with one of the one or more lists of CIF values.

11 . A method comprising:

sending, by a wireless communication node to a wireless communication device, one or more lists of carrier indicator (CIF) values for sounding reference signal (SRS) transmissions, the one or more lists of CIF values including a first list of CIF values that is used for SRS transmissions for a positioning purpose, and a second list of CIF values that is used for SRS transmissions for a non-positioning purpose; and

causing the wireless communication device to determine a first SRS transmission according to the one or more lists of CIF values, and according to a value of a CIF field in a downlink control information (DCI), and to perform the first SRS transmission in a first component carrier (CC) mapped to the value of the CIF field.

12 . The method of claim 11 , wherein each of the one or more lists of CIF values is configured corresponding to a respective SRS resource or resource set, or a respective SRS configuration (SRS-Config).

13 . The method of claim 11 , wherein the wireless communication device uses a first SRS resource or resource set for the first SRS transmission, when a CIF value indicated by the DCI matches with one of the one or more lists of CIF values.

14 . A wireless communication device comprising:

at least one processor configured to:

identify a priority rule that is predetermined or is configured via higher layer signaling, to prioritize a plurality of sounding reference signal (SRS) transmissions in at least a first component carrier (CC) and a second CC, wherein the priority rule operates according to a CC index of at least one of the first CC or the second CC;

determine, according to a time offset and a second SRS transmission in the second CC, to perform a first SRS transmission in the first CC in an available time unit, the second SRS transmission overlapping the first SRS transmission in time domain, wherein the second SRS transmission has a higher priority than the first SRS transmission, and the wireless communication device is incapable of simultaneously supporting the first SRS transmission and the second SRS transmission; and

perform the first SRS transmission in the first CC in the available time unit.

15 . The wireless communication device of claim 14 , wherein the second SRS transmission is of semi-persistent or periodic type.

16 . The wireless communication device of claim 14 , wherein the higher layer signaling comprises radio resource control (RRC) signaling or medium access control (MAC) layer signaling.

17 . The wireless communication device of claim 14 , wherein the available time unit excludes an instance where the second SRS transmission overlaps with the first SRS transmission in a same symbol.

18 . The wireless communication device of claim 14 , wherein the at least one processor is configured to:

determine to perform the first SRS transmission in a next available time unit, if the first SRS transmission would overlap in time with the second SRS transmission if performed in the available time unit.

19 . The wireless communication device of claim 14 , wherein the at least one processor is configured to:

determine to drop or bypass the first SRS transmission, if the first SRS transmission would overlap in time with the second SRS transmission if performed in the available time unit.

20 . The wireless communication device of claim 14 , wherein the wireless communication device is incapable of simultaneously supporting two beams for the first SRS transmission and the second SRS transmission respectively.