Uplink Power Control Parameter Recovery for PUCCH, PUSCH, and SRS

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Solution Overview

Problem

In existing communications systems, power control parameters for PUCCH, PUSCH, or SRS are often incompletely configured, leading to issues such as excessive UE transmit power consumption, increased interference, and reduced system capacity due to the network losing control over UE power settings.

Innovation Solution

A method for determining power control parameters by the terminal, using configured parameters of another object, historical configurations, or protocol specifications, particularly selecting a pathloss reference signal and other parameters based on QCL information and RSs like PDCCH, PRACH, and CORESET, to ensure complete power control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If all power control parameters are configured by the network device, then the network can maintain control over UE power settings, but the resource overheads for power control increase significantly

Engineering Contradiction:

Improvenetwork control over power settingsVSAvoidresource overheads

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent segments the power control parameter configuration into two parts: parameters that are configured by the network device and parameters that are determined by the terminal itself. The terminal autonomously determines parameters such as pathloss reference signal, target receive power, pathloss compensation factor, and closed-loop power control based on pre-defined rules and measurements, reducing the need for network configuration while maintaining control reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The terminal performs self-service by autonomously determining its own power control parameters based on measurements of reference signals (such as PDCCH, PRACH, CORESET) and pre-defined rules. This self-determination mechanism reduces the signaling overhead from the network while ensuring the terminal can adjust its transmit power appropriately without continuous network intervention.

Inventive Principle:

Principle #25Self-service

2Quantity of substance

If power control parameters are not fully configured, then resource overheads are reduced, but the terminal cannot adjust uplink transmit power leading to excessive power consumption and interference

Engineering Contradiction:

Improveresource overheadsVSAvoidinterference and power consumption

Core Design Contradiction:

Quantity of substanceVSObject-generated harmful factors

Solution Approach 1:

The patent establishes pre-defined rules and relationships between power control parameters and reference signals before the terminal needs to adjust its power. The terminal is pre-configured with knowledge of how to determine parameters like pathloss reference signal and target receive power based on measurements of specific reference signals (PDCCH, PRACH, CORESET), enabling it to autonomously and accurately control its transmit power without requiring complete parameter configuration from the network.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The terminal continuously measures reference signals from the network and uses these measurements to feedback-adjust its power control parameters. By monitoring the quality and strength of received reference signals, the terminal can dynamically determine appropriate transmit power levels, ensuring it does not consume excessive power or create interference while maintaining reliable communication.

Inventive Principle:

Principle #23Feedback

3Quantity of substance

If the terminal autonomously determines power control parameters, then resource overheads are minimized, but the complexity of the terminal increases

Engineering Contradiction:

Improveresource overheadsVSAvoidterminal complexity

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The patent changes the parameter representation from requiring explicit network configuration of all power control parameters to using reference signal measurements and pre-defined relationships. The terminal determines parameters like pathloss reference signal, target receive power, and pathloss compensation factor by measuring existing reference signals (PDCCH, PRACH, CORESET) and applying predetermined rules, reducing terminal complexity compared to implementing a full parameter configuration and management system.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12538222B2Method for determining power control parameter and terminal

Publication Date: 2026.01.27 VIVO MOBILE COMM CO LTD

AI summary

A method for determining a power control parameter and a terminal. The method includes: in a case that no target parameter has been configured in power control parameters of a target object, determining a target parameter of the target object in any one of the following manners: determining, based on a target parameter of another object configured by a network device, the target parameter of the target object, where the another object is different from the target object; determining, based on a historical configuration, the target parameter of the target object; and determining, based on protocol specification, the target parameter of the target object; where the target object and the another object are selected from a physical uplink control channel PUCCH, a physical uplink shared channel PUSCH, and a sounding reference signal SRS.