System and method for power control in uplink transmissions

Patent metadata

Field	Value
Publication number	US-12538236-B2
Application number	US-202318340666-A
Country	US
Kind code	B2
Filing date	Jun 23, 2023
Priority date	Dec 24, 2020
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A system and method for wireless communication are disclosed herein. One embodiment includes a wireless communication device receiving, from a wireless communication node, a configuration that comprises a plurality of sets of power control parameters; and receiving, from the wireless communication node, a signalling to associate the plurality of sets of power control parameters with a plurality of sets of uplink data transmission instances.

First claim

The invention claimed is:

1 . A wireless communication method, comprising:
receiving, by a wireless communication device from a wireless communication node, a configuration that comprises a plurality of sets of power control parameters; receiving, by the wireless communication device from the wireless communication node, a medium access control control element (MAC CE), wherein a most significant bit (MSB) in a second octet of the MAC CE being 0 indicates to update a mapping between an identity of a first configured mapping and an identity of a first physical uplink shared channel (PUSCH) path loss estimation reference signal index associated with a first sounding reference signal (SRS) resource set, and wherein the MSB in the second octet of the MAC CE being 1 indicates to update a mapping between an identity of a second configured mapping and an identity of a second PUSCH path loss estimation reference signal index associated with a second SRS resource set; receiving, by the wireless communication device from the wireless communication node, a scheduling grant where a first SRS resource indicator (SRI) field or a second SRI field is absent; and determining, by the wireless communication device, default power control parameter values that correspond to at least a set of a plurality of sets of uplink data transmission instances, wherein each of the uplink data transmission instances includes a codebook based or non-codebook based PUSCH transmission, and wherein each of the uplink data transmission instances is associated with a corresponding SRS resource set.

2 . The wireless communication method of claim 1 , wherein each of the sets of power control parameters comprises at least one of: a target received power, a ratio of fractional path-loss compensation, a PUSCH path loss estimation reference signal index, or a closed loop power control adjustment index.

3 . The wireless communication method of claim 1 , wherein determining, by the wireless communication device, the default power control parameter values that correspond to the plurality of sets of uplink data transmission instances comprises:
determining, by the wireless communication device, that the default power control parameter values correspond to a first set of the sets of uplink data transmission instances, when the first SRI field is absent in the scheduling grant.

4 . The wireless communication method of claim 3 , wherein the default power control parameter values corresponding to the first set of the sets of uplink data transmission instances comprise at least one of:
a target received power identified from a first open-loop power control parameter in an open-loop power control parameter set; a ratio of fractional path-loss compensation identified from the first open-loop power control parameter in the open-loop power control parameter set; or a closed loop power control adjustment index with a value=0.

5 . The wireless communication method of claim 1 , wherein determining, by the wireless communication device, the default power control parameter values that correspond to the plurality of sets of uplink data transmission instances comprises:
determining, by the wireless communication device, that the default power control parameter values correspond to a second set of the sets of uplink data transmission instances, when a second SRI field is absent in the scheduling grant.

6 . The wireless communication method of claim 5 , wherein the default power control parameter values corresponding to the second set of the sets of uplink data transmission instances comprise at least one of:
a target received power identified from a second open-loop power control parameter in an open-loop power control parameter set; a ratio of fractional path-loss compensation identified from the second open-loop power control parameter in the open-loop power control parameter set; or a closed loop power control adjustment index with a value=1.

7 . The wireless communication method of claim 1 , wherein the configuration is received through a Radio Resource Control (RRC) signalling.

8 . The wireless communication method of claim 1 , wherein the scheduling grant is received through a Downlink Control Information (DCI) format.

9 . A wireless communication device, comprising:
at least one processor configured to:
receive, via a receiver from a wireless communication node, a configuration that comprises a plurality of sets of power control parameters;
receive, via the receiver from the wireless communication node, a medium access control control element (MAC CE),
wherein a most significant bit (MSB) in a second octet of the MAC CE being 0 indicates to update a mapping between an identity of a first configured mapping and an identity of a first physical uplink shared channel (PUSCH) path loss estimation reference signal index associated with a first sounding reference signal (SRS) resource set, and
wherein the MSB in the second octet of the MAC CE being 1 indicates to update a mapping between an identity of a second configured mapping and an identity of a second PUSCH path loss estimation reference signal index associated with a second SRS resource set;
receive, via the receiver from the wireless communication node, a scheduling grant where a first SRS resource indicator (SRI) field or a second SRI field is absent; and
determine default power control parameter values that correspond to at least a set of a plurality of sets of uplink data transmission instances, wherein each of the uplink data transmission instances includes a codebook based or non-codebook based PUSCH transmission, and wherein each of the uplink data transmission instances is associated with a corresponding SRS resource set.

10 . The wireless communication device of claim 9 , wherein each of the sets of power control parameters comprises at least one of: a target received power, a ratio of fractional path-loss compensation, a PUSCH path loss estimation reference signal index, or a closed loop power control adjustment index.

11 . The wireless communication device of claim 9 , wherein to determine the default power control parameter values that correspond to the plurality of sets of uplink data transmission instances comprises:
determining that the default power control parameter values correspond to a first set of the sets of uplink data transmission instances, when the first SRI field is absent in the scheduling grant.

12 . The wireless communication device of claim 11 , wherein the default power control parameter values corresponding to the first set of the sets of uplink data transmission instances comprise at least one of:
a target received power identified from a first open-loop power control parameter in an open-loop power control parameter set; a ratio of fractional path-loss compensation identified from the first open-loop power control parameter in the open-loop power control parameter set; or a closed loop power control adjustment index with a value=0.

13 . The wireless communication device of claim 9 , wherein to determine the default power control parameter values that correspond to the plurality of sets of uplink data transmission instances comprises:
determining that the default power control parameter values correspond to a second set of the sets of uplink data transmission instances, when a second SRI field is absent in the scheduling grant.

14 . The wireless communication device of claim 13 , wherein the default power control parameter values corresponding to the second set of the sets of uplink data transmission instances comprise at least one of:
a target r

Assignees

• Zte Corp

Inventors

• Zhang Yang
• Jiang Chuangxin
• Yao Ke
• Zhang Shujuan
• Lu Zhaohua
• Wu Hao

Classifications

• H04W52/242

  taking into account path loss · CPC title

• H04W52/08 Primary

  Closed loop power control · CPC title

• H04W52/146 Primary

  Uplink power control · CPC title

• H04B7/0456

  Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting · CPC title

• H04W72/232

  the control data signalling from the physical layer, e.g. DCI signalling · CPC title