Transmit power control indication for multi-panel transmission

Patent metadata

Field	Value
Publication number	US-2023292261-A1
Application number	US-202018003707-A
Country	US
Kind code	A1
Filing date	Aug 25, 2020
Priority date	Aug 25, 2020
Publication date	Sep 14, 2023
Grant date	—

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may communicate with a base station as part of a wireless communications system. The UE may receive, from a base station, an indication of a configuration for a multi-panel transmission power control (TPC) command to be transmitted by the base station. The UE may also receive, according to the indicated configuration, a downlink control information (DCI) message including a set of TPC commands. The UE may determine, based on the set of TPC commands, a first transmit power for a first antenna panel of the UE and a second transmit power for a second antenna panel of the UE. The UE may transmit an uplink signal using the first antenna panel at the first transmit power and the second antenna panel at the second transmit power.

First claim

1 . A method for wireless communications at a user equipment (UE), comprising:
receiving, from a base station, an indication of a configuration for a multi-panel transmission power control command to be transmitted by the base station; receiving, according to the indicated configuration, a downlink control information message comprising a plurality of transmission power control commands; determining, based at least in part on the plurality of transmission power control commands, a first transmit power for a first antenna panel of the UE and a second transmit power for a second antenna panel of the UE; and transmitting an uplink signal using the first antenna panel at the first transmit power and the second antenna panel at the second transmit power.

2 . The method of claim 1 , further comprising:
determining, based at least in part on the received indication, that the configuration for the multi-panel transmission power control command indicates that the downlink control information message comprises a first transmission power control command and a second transmission power control command, wherein the first transmission power control command is different from the second transmission power control command.

3 . The method of claim 2 , further comprising:
determining the first transmit power based at least in part on the first transmission power control command; and determining the second transmit power based at least in part on a second transmission power control command, wherein the second transmission power control command includes a differential value applied to the first transmission power control command.

4 . The method of claim 3 , wherein the first transmission power control command comprises two bits and the second transmission power control command comprises one bit.

5 . The method of claim 1 , further comprising:
determining, based at least in part on a first field of the downlink control information message, a table of one or more multi-panel transmission power control command tables; and determining the first transmission power control command and the second transmission power control command based at least in part on the table and a second field of the downlink control information message that indicates a corresponding entry of a plurality of entries of the table.

6 . The method of claim 5 , wherein the second field of the downlink control information message indicates a row of the table, wherein the row comprises an indication of the first transmission power control command and the second transmission power control command.

7 . The method of claim 5 , further comprising:
receiving radio resource control signaling configuring the one or more multi-panel transmission power control command tables.

8 . The method of claim 5 , further comprising:
determining the one or more multi-panel transmission power control command tables based at least in part on a pre-configuration.

9 . The method of claim 1 , further comprising:
determining, based at least in part on the received indication, that the configuration for the multi-panel transmission power control command indicates that the downlink control information message comprises a first transmission power control command and a second transmission power control command, wherein the first transmission power control command is a same value as the second transmission power control command.

10 . The method of claim 1 , wherein receiving the configuration comprises:
receiving, from the base station, radio resource control signaling or a medium access control control element comprising the indication of the configuration.

11 . The method of claim 1 , wherein the downlink control information message comprises the indication of the configuration.

12 . A method for wireless communications at a base station, comprising:
transmitting, to a user equipment (UE), an indication of a configuration for a multi-panel transmission power control command to be transmitted by the base station; determining to adjust a transmit power of one or more of a first antenna panel or a second antenna panel of the UE served by the base station; and transmitting, according to the indicated configuration, a downlink control information message comprising a plurality of transmission power control commands that are based at least in part on the determined transmit power.

13 . The method of claim 12 , wherein a first transmission power control command of the plurality of transmission power control commands is different from a second transmission power control command of the plurality of transmission power control commands, wherein the first transmission power control command is for the first antenna panel and the second transmission power control command is for the second antenna panel.

14 . The method of claim 13 , wherein the second transmission power control command includes a differential value applied to the first transmission power control command.

15 . The method of claim 14 , wherein the first transmission power control command comprises two bits and the second transmission power control command comprises one bit.

16 . The method of claim 12 , wherein a first field of the downlink control information message indicates a table of one or more multi-panel transmission power control command tables and a second field of the downlink control information message indicates a corresponding entry of a plurality of entries of the table, the corresponding entry indicating a first transmission power control command and a second transmission power control command.

17 . The method of claim 16 , wherein the second field of the downlink control information message indicates a row of the table, wherein the row comprises an indication of the first transmission power control command and the second transmission power control command.

18 . The method of claim 16 , further comprising:
transmitting, to the UE, radio resource control signaling configuring the one or more multi-panel transmission power control command tables.

19 . The method of claim 12 , further comprising:
transmitting radio resource control signaling or medium access control control element signaling comprising the indication of the configuration.

20 . The method of claim 12 , wherein the downlink control information message comprises the indication of the configuration.

21 . An apparatus for wireless communications at a user equipment (UE), comprising:
a processor, memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to:
receive, from a base station, an indication of a configuration for a multi-panel transmission power control command to be transmitted by the base station;
receive, according to the indicated configuration, a downlink control information message comprising a plurality of transmission power control commands;
determine, based at least in part on the plurality of transmission power control commands, a first transmit power for a first antenna panel of the UE and a second transmit power for a second antenna panel of the UE; and
transmit an uplink signal using the first antenna panel at the first transmit power and the second antenna panel at the second transmit power.

22 . The apparatus of claim 21 , wherein the instructions are further executable by the processor to cause the apparatus to:
determine, based at least in part on the received indication, that the c

Assignees

• Yuan Fang
• Taherzadeh Boroujeni Mahmoud
• Khoshnevisan Mostafa
• Damnjanovic Jelena
• Nam Wooseok
• Luo Tao
• Zhang Xiaoxia
• Montojo Juan
• Qualcomm Inc

Inventors

• Yuan Fang
• Taherzadeh Boroujeni Mahmoud
• Khoshnevisan Mostafa
• Damnjanovic Jelena
• Nam Wooseok
• Luo Tao
• Zhang Xiaoxia
• Montojo Juan

Classifications

• H04W52/42 Primary

  in systems with time, space, frequency or polarisation diversity · CPC title

• H04W52/248

  where transmission power control commands are generated based on a path parameter · CPC title

• H04W52/247

  where the output power of a terminal is based on a path parameter sent by another terminal · CPC title

• H04W52/58

  Format of the TPC bits · CPC title

• H04W52/146

  Uplink power control · CPC title