US-12621777-B2 - Method and apparatus for reporting power headroom, and communication device

US12621777B2US 12621777 B2US12621777 B2US 12621777B2US-12621777-B2

Abstract

A method for reporting power headroom is performed by a user equipment (UE), and includes: 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.

Inventors

Yang Liu

Assignees

BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20210331

Claims (20)

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.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is a national phase of International Application No. PCT/CN2021/084699, filed on Mar. 31, 2021, the content of which is hereby incorporated by reference in its entirety. TECHNICAL FIELD The disclosure relates to a field of wireless communication technologies, in particular to a method for reporting power headroom, an apparatus for reporting power headroom and a communication device. BACKGROUND Multiple Transmission and Reception Points (TRPs)/PANELs are mainly applied to improve coverage at cell edges and provide a balanced service quality within a service area. The multiple TRPs/PANELs can collaborate in various ways to transmit data. Power Headroom Reporting (PHR) reflects an available power of a terminal, i.e., power headroom, so that a network device can carry out power control based on the acquired PHR. SUMMARY According to a first aspect, a method for reporting power headroom, performed by a user equipment (UE), is provided. The method includes: obtaining physical uplink shared channel (PUSCH)/PUSCHs transmitted towards a plurality of transmission and reception points (TRPs);selecting at least one reporting target TRP from the PUSCHs transmitted towards 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; andselecting at least one target PHR from the at least one PHR and reporting the at least one target PHR. According to a second aspect, a communication device is provided. The communication device includes: a transceiver, a memory, and a processor connected to the transceiver and the memory, respectively. When computer executable instructions stored on the memory are executed by the processor, transmitting and receiving of wireless signals of the transceiver are controlled, and the method of the first aspect is performed. According to a third aspect, a computer storage medium having computer-executable instructions stored thereon is provided. When the computer-executable instructions are executed by a processor, the method of the first aspect is performed. BRIEF DESCRIPTION OF THE DRAWINGS Example embodiments will be described in detail below with reference to the accompanying drawings, in which: FIG. 1 is a flowchart illustrating a method for reporting power headroom according to embodiments of the disclosure. FIG. 2 is a flowchart illustrating another method for reporting power headroom according to embodiments of the disclosure. FIG. 3 is a flowchart illustrating another method for reporting power headroom according to embodiments of the disclosure. FIG. 4 is a flowchart illustrating another method for reporting power headroom according to embodiments of the disclosure. FIG. 5 is a flowchart illustrating another method for reporting power headroom according to embodiments of the disclosure. FIG. 6 is a schematic diagram illustrating an apparatus for reporting power headroom according to embodiments of the disclosure. FIG. 7 is a block diagram illustrating a user equipment (UE) 800 according to embodiments of the disclosure. DETAILED DESCRIPTION Reference will now be made in detail to example embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise represented. The implementations set forth in the following description of example embodiments do not represent all implementations consistent with the disclosure. Instead, they are merely examples of apparatuses and methods consistent with aspects related to the disclosure as recited in the appended claims. The terms used in the disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the disclosure. The singular forms of “a” and “the” used in the disclosure and appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It is also understandable that the term “and/or” as used herein refers to and includes any or all possible combinations of one or more associated listed items. It is understandable that although the terms “first”, “second”, and “third” may be used in the embodiments of the disclosure to describe various information, the information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the term “if” as used herein can be interpreted as “when”, “while” or “in response to determining”. The embodiments of the disclosure are described in detail below, and examples of the embodiments are i