US-12628088-B2 - Transmit power control in wireless communication networks

US12628088B2US 12628088 B2US12628088 B2US 12628088B2US-12628088-B2

Abstract

One or more first transmit power control parameters that are common to transmit power control for multiple different physical uplink channels are transmitted by a network device and received by a user equipment (UE) in a wireless communication network. The UE transmits, and the network device receives, one of the multiple different physical uplink channels. That uplink channel is transmitted at a transmit power that is based on the first transmit power control parameter(s) and one or more second transmit power control parameters that are specific to the transmit power control for the uplink channel.

Inventors

Liqing Zhang
Hao Tang

Assignees

HUAWEI TECHNOLOGIES CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20231107

Claims (20)

1 . A method comprising: receiving, by a user equipment (UE) in a wireless communication network, a first transmit power control parameter that is common to transmit power control for multiple different physical uplink channels; transmitting, by the UE, one of the multiple different physical uplink channels at a transmit power that is based on the first transmit power control parameter and a second transmit power control parameter that is specific to the transmit power control for the one of the multiple different physical uplink channels.
2 . The method of claim 1 , wherein the first transmit power control parameter comprises a large time-scale parameter.
3 . The method of claim 1 , wherein the second transmit power control parameter comprises a channel-specific parameter.
4 . The method of claim 3 , wherein the channel-specific parameter comprises one or more parameters of a set of dynamic communication parameters and a set of other factors that are used to estimate a channel-specific offset.
5 . The method of claim 4 , wherein the set of dynamic communication parameters comprises one or more of: numerology; transmission bandwidth; modulation and coding scheme (MCS); channel format; multiple-link configuration; multiple-input multiple-output (MIMO) with active beam direction.
6 . The method of claim 4 , wherein the set of other factors comprises one or more of: channel differentiation; carrier frequency; network node type; application type; multiple-input multiple-output (MIMO) with active beam direction.
7 . The method of claim 1 , wherein the transmit power control for the multiple different physical uplink channels is associated with a reference model that is based on the first transmit power control parameter and the second transmit power control parameter.
8 . The method of claim 1 , wherein receiving the first transmit power control parameter comprises receiving the first power control parameter in one or more of radio resource control (RRC) signaling and physical layer signaling.
9 . A user equipment (UE) for a wireless communication network, the UE comprising: a communication interface; a processor, coupled to the communication interface; a non-transitory computer readable storage medium, coupled to the processor, storing programming for execution by the processor, the programming comprising instructions to: receive a first transmit power control parameter that is common to transmit power control for multiple different physical uplink channels; transmit one of the multiple different physical uplink channels at a transmit power that is based on the first transmit power control parameter and a second transmit power control parameter that is specific to the transmit power control for the one of the multiple different physical uplink channels.
10 . The UE of claim 9 , wherein the first transmit power control parameter comprises a large time-scale parameter.
11 . The UE of claim 9 , wherein the second transmit power control parameter comprises a channel-specific parameter.
12 . The UE of claim 11 , wherein the channel-specific parameter comprises one or more parameters of a set of dynamic communication parameters and a set of other factors that are used to estimate a channel-specific offset.
13 . The UE of claim 12 , wherein the set of dynamic communication parameters comprises one or more of: numerology; transmission bandwidth; modulation and coding scheme (MCS); channel format; multiple-link configuration; multiple-input multiple-output (MIMO) with active beam direction.
14 . The UE of claim 12 , wherein the set of other factors comprises one or more of: channel differentiation; carrier frequency; network node type; application type; multiple-input multiple-output (MIMO) with active beam direction.
15 . The UE of claim 9 , wherein the transmit power control for the multiple different physical uplink channels is associated with a reference model that is based on the first transmit power control parameter and the second transmit power control parameter.
16 . The UE of claim 9 , wherein the instructions to receive the first power control parameter comprise instructions to receive the first power control parameter in one or more of radio resource control (RRC) signaling and physical layer signaling.
17 . A method comprising: transmitting, by a network device to a user equipment (UE) in a wireless communication network, a first transmit power control parameter that is common to transmit power control at the UE for multiple different physical uplink channels; receiving, by the network device from the UE, one of the multiple different physical uplink channels transmitted by the UE at a transmit power that is based on the first transmit power control parameter and a second transmit power control parameter that is specific to the transmit power control for the one of the multiple different physical uplink channels.
18 . The method of claim 17 , wherein the first transmit power control parameter comprises a large time-scale parameter.
19 . The method of claim 17 , wherein the second transmit power control parameter comprises a channel-specific parameter.
20 . A network device for a wireless communication network, the network device comprising: a communication interface; a processor, coupled to the communication interface; a non-transitory computer readable storage medium, coupled to the processor, storing programming for execution by the processor, the programming comprising instructions to: transmit, to a User Equipment (UE) in the wireless communication network, a first transmit power control parameter that is common to transmit power control at the UE for multiple different physical uplink channels; receive, from the UE, one of the multiple different physical uplink channels transmitted by the UE at a transmit power that is based on the first transmit power control parameter and a second transmit power control parameter that is specific to the transmit power control for the one of the multiple different physical uplink channels.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is a continuation of International Application No. PCT/CN2021/094079, filed on May 17, 2021, and entitled “TRANSMIT POWER CONTROL IN WIRELESS COMMUNICATION NETWORKS,” the disclosure of which is hereby incorporated by reference in its entirety. FIELD This application relates generally to communications in wireless communication networks, and in particular to transmit power control in such networks. BACKGROUND In 4th-generation (4G) and earlier generation wireless communication networks, there are multiple uplink channels. Uplink channels may include, for example, a random access channel (RACH), uplink data channels such as physical uplink shared channel (PUSCH), and uplink control channels such as physical uplink control channel (PUCCH) and sounding reference signal (SRS) channel. Although these channels may experience similar channel conditions and interference environments, each uplink channel may have its own power control parameters and separate configurations in conventional approaches to transmit power control. Across different uplink channels, there may be redundant power control parameters, such as maximum transmit power of a particular device or parameters that are expected to change over a relatively long time period, configured separately for each uplink channel. Each uplink channel may have numerous power control parameters, and such parameters may have numerous possible values for each channel without an indication of how to use these parameters, for example to achieve certain expected performance. Providing more efficient transmit power control, in terms of reducing configuration overhead and/or optimizing power control for example, remains a challenge. Per-channel power control configurations according to some conventional power control techniques can involve significant overhead in providing power control parameter values to communication devices. It may also be desirable to better optimize uplink channel power control parameter determination. SUMMARY Some embodiments of the present disclosure provide a unified power control methodology that is able to reduce redundancy and simplify very complicated power control configurations. Such a unified methodology can be readily optimized, and provide forward compatibility, with modelling for training by artificial intelligence (AI), for example. Commonality of parameters for transmit power control can be considered in developing a single reference model for all uplink channels. One reference model can be applicable not only to uplink channels for a single communication device, but also to more than one communication device, such as to communication devices of a certain group or type. With a baseline or reference model, differential or differentiation power control may be applied to control offsets for different uplink channels on demand. Transmit power control parameters or factors and differences between uplink channels, such as a 1-symbol channel versus a 2-symbol channel for example, affect offsets or adjustments that are applicable to change transmit power for a particular uplink channel relative to the reference model. One aspect of the present disclosure relates to a method that involves receiving, by a UE in a wireless communication network, a first transmit power control parameter that is common to transmit power control for multiple different physical uplink channels; and transmitting, by the UE, one of the multiple different physical uplink channels. The transmitting involves transmitting the one of the multiple different physical uplink channels at a transmit power that is based on the first transmit power control parameter and a second transmit power control parameter that is specific to the transmit power control for the one of the multiple different physical uplink channels. A UE for a wireless communication network, according to another aspect of the present disclosure includes: a communication interface; a processor, coupled to the communication interface; and a non-transitory computer readable storage medium, coupled to the processor. The non-transitory computer readable storage medium stores programming for execution by the processor. The programming includes instructions to: receive a first transmit power control parameter that is common to transmit power control for multiple different physical uplink channels; and transmit one of the multiple different physical uplink channels at a transmit power that is based on the first transmit power control parameter and a second transmit power control parameter that is specific to the transmit power control for the one of the multiple different physical uplink channels. Another embodiment that includes such a medium relates to a computer program product including a non-transitory computer readable storage medium storing programming. The programming includes instructions to: receive a first transmit power control parameter that is common