Granted Patent B2

US 12,621,777 · App. 18/552,860 · Granted May 5, 2026

Inventor: Yang Liu (Beijing, CN)

Assignee: Beijing Xiaomi Mobile Software Co., Ltd.

H04W52/365H04W52/40

Abstract

Claims (57)

1 . A method for reporting power headroom, performed by a user equipment (UE), comprising:

obtaining one or more physical uplink shared channels (PUSCHs) transmitted towards a plurality of transmission and reception points (TRPs);

selecting at least one reporting target TRP from the plurality of TRPs;

obtaining at least one power headroom reporting (PHR) of at least one PUSCH of the at least one reporting target TRP; and

selecting at least one target PHR from the at least one PHR and reporting the at least one target PHR;

wherein selecting the at least one reporting target TRP from the plurality of TRPs comprises one of:

obtaining sounding reference signal (SRS) resource set identifiers (IDs) related to the plurality of TRPs respectively; and selecting one reporting target TRP from the plurality of TRPs based on the SRS resource set IDs related to the plurality of TRPs; or

obtaining a plurality of SRS resource indicator (SRIs) corresponding to the plurality of TRPs; and selecting one reporting target TRP from the plurality of TRPs based on a ranking list of the plurality of SRIs.

2 . The method of claim 1 , wherein each SRS resource set ID is configured to represent ranking information, and a TRP related to a largest SRS resource set ID or a smallest SRS resource set ID is selected in a pre-defined manner or in a configured manner through a signaling from a network side device, as the reporting target TRP.

3 . The method of claim 2 , wherein the signaling from the network side device is a radio resource control (RRC) signaling.

4 . The method of claim 2 , wherein the SRS resource set IDs related to the plurality of TRPs are ranked in an ascending order or a descending order.

5 . The method of claim 1 , wherein a TRP corresponding to a first SRI or a last SRI in the ranking list is determined as the reporting target TRP.

6 . The method of claim 5 , wherein the ranking list of the plurality of SRIs comprises an ascending order of SRIs or a descending order of SRIs, the first SRI is ranked first of the ascending order of SRIs or the descending order of SRIs, and the last SRI is ranked last of the ascending order of SRIs or the descending order of SRIs.

7 . The method of claim 1 , wherein selecting the at least one reporting target TRP from the plurality of TRPs comprises:

selecting all of the plurality of TRPs as reporting target TRPs;

wherein selecting the at least one target PHR from the at least one PHR and reporting the at least one target PHR comprises: selecting one target PHR from a plurality of PHRs corresponding to the reporting target TRPs and reporting the target PHR; and

wherein the method further comprises: reporting a sounding reference signal (SRS) resource indicator (SRI) ranking value or a SRS resource set identifier (ID) related to the TRP corresponding to the target PHR.

8 . The method of claim 7 , wherein selecting one target PHR from the plurality of PHRs corresponding to the reporting target TRPs and reporting the target PHR comprises:

determining one of at least one PHR corresponding to the at least one negative value as the target PHR and reporting the target PHR, wherein at least one of the plurality of PHRs is a negative value.

9 . The method of claim 7 , wherein selecting one target PHR from the plurality of PHRs corresponding to the reporting target TRPs and reporting the target PHR comprises:

determining a PHR with a largest absolute value as the target PHR and reporting the target PHR, wherein values of the plurality of PHRs are all negative.

10 . The method of claim 7 , wherein selecting one target PHR from the plurality of PHRs corresponding to the reporting target TRPs and reporting the target PHR comprises:

determining a PHR with a smallest absolute value as the target PHR and reporting the target PHR, wherein values of the plurality of PHRs are all positive.

11 . The method of claim 1 , wherein the PHR is obtained by:

obtaining an actual transmit power of a corresponding TRP;

obtaining a maximum transmit power; and

obtaining the PHR based on the actual transmit power and the maximum transmit power.

12 . The method of claim 1 , further comprising:

obtaining actual PHR measurement values corresponding to the plurality of TRPs; and

reporting the actual PHR measurement values corresponding to the plurality of TRPs.

13 . The method of claim 12 , wherein reporting the actual PHR measurement values corresponding to the plurality of TRPs comprises:

reporting the actual PHR measurement values corresponding to the plurality of TRPs based on a pre-defined order or a ranking order based on sounding reference signal (SRS) resource set identifiers (IDs).

14 . The method of claim 12 , wherein reporting the actual PHR measurement values corresponding to the plurality of TRPs comprises:

reporting at least one actual PHR measurement value corresponding to a part of the plurality of TRPs as a selected actual PHR measurement value, and reporting differences of actual PHR measurement values, corresponding to a remaining part of the plurality of TRPs, compared to the at least one actual PHR measurement value.

15 . The method of claim 12 , wherein the PUSCH transmission is controlled based on multi-downlink control information (DCI).

16 . The method of claim 1 , wherein respective power for transmitting the PUSCH towards the plurality of TRPs are separately controlled.

17 . The method of claim 1 , wherein the PUSCH transmission is controlled based on single downlink control information (DCI).

18 . A user equipment (UE), comprising:

a transceiver,

a memory, and

a processor connected to the transceiver and the memory respectively, wherein the processor is configured to:

obtain one or more physical uplink shared channels (PUSCHs) transmitted towards a plurality of transmission and reception points (TRPs);

select at least one reporting target TRP from the plurality of TRPs;

obtain at least one power headroom reporting (PHR) of at least one PUSCH of the at least one reporting target TRP; and

select at least one target PHR from the at least one PHR and report the at least one target PHR;

wherein the processor is further configured to select at least one reporting target TRP from the plurality of TRPs by one of:

obtaining sounding reference signal (SRS) resource set identifiers (IDs) related to the plurality of TRPs respectively; and selecting one reporting target TRP from the plurality of TRPs based on the SRS resource set IDs related to the plurality of TRPs; or

obtaining a plurality of SRS resource indicator (SRIs) corresponding to the plurality of TRPs; and selecting one reporting target TRP from the plurality of TRPs based on a ranking list of the plurality of SRIs.

19 . The UE of claim 18 , wherein each SRS resource set ID is configured to represent ranking information, and a TRP related to a largest SRS resource set ID or a smallest SRS resource set ID is selected in a pre-defined manner or in a configured manner through a signaling from a network side device, as the reporting target TRP.

20 . A non-transitory computer-readable storage medium having stored thereon computer-executable instructions that, when executed by a processor of a user equipment (UE), cause the UE to perform:

obtaining one or more physical uplink shared channels (PUSCHs) transmitted towards a plurality of transmission and reception points (TRPs);

selecting at least one reporting target TRP from the plurality of TRPs;

obtaining at least one power headroom reporting (PHR) of at least one PUSCH of the at least one reporting target TRP; and

selecting at least one target PHR from the at least one PHR and reporting the at least one target PHR;

wherein the processor is further configured to perform one of:

obtaining sounding reference signal (SRS) resource set identifiers (IDs) related to the plurality of TRPs respectively; and selecting one reporting target TRP from the plurality of TRPs based on the SRS resource set IDs related to the plurality of TRPs; or

obtaining a plurality of SRS resource indicator (SRIs) corresponding to the plurality of TRPs; and selecting one reporting target TRP from the plurality of TRPs based on a ranking list of the plurality of SRIs.

Assignments (1)

Continuity (1)

References Cited (26)