Uplink full-power transmission method and device

Patent metadata

Field	Value
Publication number	US-12309709-B2
Application number	US-202217586318-A
Country	US
Kind code	B2
Filing date	Jan 27, 2022
Priority date	Aug 7, 2019
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

Embodiments of this disclosure disclose an uplink full-power transmission method and a device. The method is applied to a terminal device and includes: performing uplink transmission based on an uplink transmit power obtained through scaling by a power scaling coefficient, where the power scaling coefficient is determined based on a power control factor, and the power control factor includes at least one of the following: an uplink full-power transmission capability of the terminal device, a supported transmission precoding matrix indicator TPMI reported by the terminal device, a TPMI delivered by a network device, a working mode reported by the terminal device, or the number of antenna ports for each SRS resource in a sounding reference signal SRS resource set that is configured by the network device based on the working mode.

First claim

What is claimed is:

1. An uplink full-power transmission method, applied to a terminal device and comprising:
performing uplink transmission based on an uplink transmit power obtained through scaling by a power scaling coefficient, wherein the power scaling coefficient is determined based on a power control factor; wherein
the power control factor comprises at least one of the following: an uplink full-power transmission capability of the terminal device, a supported transmission precoding matrix indicator (TPMI) reported by the terminal device, a TPMI delivered by a network device, a working mode reported by the terminal device, or the number of antenna ports for each SRS resource in a sounding reference signal (SRS) resource set that is configured by the network device based on the working mode;
wherein the power scaling coefficient is determined in the following manner:
if the power control factor satisfies the following condition, determining the power scaling coefficient to be 1:
part of radio frequency branches of the terminal device supports full-power transmission, the number of antenna ports for each SRS resource in the SRS resource set is different, and the TPMI delivered by the network device falls within the TPMI reported by the terminal device; wherein
the full-power transmission is transmission based on a maximum transmit power of the terminal device.

2. The method according to claim 1 , wherein the uplink full-power transmission capability is determined in any one of the following manners:
reporting the uplink full-power transmission capability; or
reporting the uplink full-power transmission capability, and receiving an uplink full-power transmission indication delivered by the network device, wherein the uplink full-power transmission indication is used to indicate that the terminal device is to use an uplink full-power transmission mode for uplink transmission.

3. The method according to claim 1 , the performing uplink transmission based on an uplink transmit power obtained through scaling by a power scaling coefficient comprises:
if the uplink full-power transmission capability of the terminal device is that none of radio frequency branches supports full-power transmission or part of radio frequency branches supports full-power transmission, and an uplink transmission rank of the terminal device is equal to the number of uplink transmission antenna ports of the terminal device, performing uplink transmission based on the uplink transmit power according to a precoding codebook delivered by the network device; wherein
the precoding codebook is determined based on the number of uplink transmission antenna ports of the terminal device, the uplink transmission rank, and the number of antenna ports for each SRS resource in the SRS resource set.

4. The method according to claim 1 , the performing uplink transmission based on an uplink transmit power obtained through scaling by a power scaling coefficient comprises:
if the number of antenna ports for each SRS resource in the SRS resource set configured by the network device is different, and an uplink transmission rank of the terminal device is less than the number of uplink transmission antenna ports of the terminal device, performing uplink transmission based on the uplink transmit power in an SRS resource transmission mode corresponding to the number of antenna ports of an SRS resource that is the same as the uplink transmission rank.

5. A terminal device, comprising:
a memory, storing a computer program instruction; and
a processor, wherein the computer program instruction is executed by the processor to implement:
performing uplink transmission based on an uplink transmit power obtained through scaling by a power scaling coefficient, wherein the power scaling coefficient is determined based on a power control factor; wherein
the power control factor comprises at least one of the following: an uplink full-power transmission capability of the terminal device, a supported transmission precoding matrix indicator (TPMI) reported by the terminal device, a TPMI delivered by a network device, a working mode reported by the terminal device, or the number of antenna ports for each SRS resource in a sounding reference signal (SRS) resource set that is configured by the network device based on the working mode;
wherein the power scaling coefficient is determined in the following manner:
if the power control factor satisfies the following condition, determining the power scaling coefficient to be 1;
part of radio frequency branches of the terminal device supports full-power transmission, the number of antenna ports for each SRS resource in the SRS resource set is different, and the TPMI delivered by the network device falls within the TPMI reported by the terminal device; wherein
the full-power transmission is transmission based on a maximum transmit power of the terminal device.

6. The terminal device according to claim 5 , wherein the uplink full-power transmission capability is determined in any one of the following manners:
reporting the uplink full-power transmission capability; or
reporting the uplink full-power transmission capability, and receiving an uplink full-power transmission indication delivered by the network device, wherein the uplink full-power transmission indication is used to indicate that the terminal device is to use an uplink full-power transmission mode for uplink transmission.

7. The terminal device according to claim 5 , wherein the computer program instruction is further executed by the processor to implement:
if the uplink full-power transmission capability of the terminal device is that none of radio frequency branches supports full-power transmission or part of radio frequency branches supports full-power transmission, and an uplink transmission rank of the terminal device is equal to the number of uplink transmission antenna ports of the terminal device, performing uplink transmission based on the uplink transmit power according to a precoding codebook delivered by the network device; wherein
the precoding codebook is determined based on the number of uplink transmission antenna ports of the terminal device, the uplink transmission rank, and the number of antenna ports for each SRS resource in the SRS resource set.

8. The terminal device according to claim 5 , wherein the computer program instruction is further executed by the processor to implement:
if the number of antenna ports for each SRS resource in the SRS resource set configured by the network device is different, and an uplink transmission rank of the terminal device is less than the number of uplink transmission antenna ports of the terminal device, performing uplink transmission based on the uplink transmit power in an SRS resource transmission mode corresponding to the number of antenna ports of an SRS resource that is the same as the uplink transmission rank.

9. A network device, comprising:
a memory, storing a computer program instruction; and
a processor, wherein the computer program instruction is executed to implement:
receiving uplink data sent by a terminal device, wherein the uplink data is transmitted on uplink by the terminal device based on an uplink transmit power obtained through scaling by a power scaling coefficient, and the power scaling coefficient is determined based on a power control factor; wherein
the power control factor comprises at least one of the following: an uplink full-power transmission capability of the terminal device, a supported transmission precoding matrix indicator (TPMI) reported by the terminal device, a TPMI delivered by the network device, a working mode reported by the terminal device, or the number of antenna ports for e

Assignees

• Vivo Mobile Communication Co Ltd

Inventors

• Sun Xiaodong
• Tamrakar Rakesh
• Sun Peng

Classifications

• H04W52/367

  Power values between minimum and maximum limits, e.g. dynamic range · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04B7/0404

  the mobile station comprising multiple antennas, e.g. to provide uplink diversity · CPC title

• H04B7/0465

  taking power constraints at power amplifier or emission constraints, e.g. constant modulus, into account · CPC title

• H04W52/146 Primary

  Uplink power control · CPC title