Terminal Uplink Power Control for Coordinated Wi‑Fi Transmission

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Solution Overview

Problem

The efficiency of transmission power control in coordinated uplink communication has not been sufficiently addressed in existing IEEE 802.11be standards, leading to increased information exchange between access points, which can hinder optimal power management.

Innovation Solution

A method for reducing information exchange between access points by having terminals determine transmission power based on signals from multiple transmission sources, allowing them to perform uplink transmission with calculated power values without needing to transmit path loss measurements to all access points, thereby enhancing efficiency and accuracy of power control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If transmission power control is implemented in coordinated uplink communication, then communication accuracy is improved, but information exchange between access points increases

Engineering Contradiction:

Improvecommunication accuracyVSAvoidinformation exchange amount

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The terminal performs self-service by independently calculating its own transmission power based on trigger frames received from multiple access points. The terminal measures path loss from each AP, determines the maximum path loss, and sets transmission power accordingly without requiring APs to exchange power control information. This eliminates the information exchange bottleneck while achieving accurate transmission power control.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Instead of having access points exchange information to determine transmission power (traditional approach), the invention inverts the control flow by having the terminal autonomously determine its transmission power based on signals received from APs. The terminal uses the trigger frames containing path loss information to calculate optimal power levels, reversing the traditional centralized control model.

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If transmission power is increased to improve signal quality, then communication reliability is improved, but interference to other transmission sources increases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidinterference

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The terminal dynamically adjusts the transmission power parameter based on measured path loss conditions. By calculating the maximum path loss among all receiving APs and setting transmission power to compensate for this loss, the system ensures reliable communication while avoiding excessive power that would cause interference. The power level adapts to channel conditions rather than being fixed.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system implements feedback through trigger frames that contain path loss information from each access point. The terminal uses this feedback to determine appropriate transmission power levels. The trigger frames provide real-time channel state information that enables the terminal to adjust power settings to achieve reliable communication without causing harmful interference to other APs.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12628087B2Terminal, communication device, and communication method

Publication Date: 2026.05.12 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

This terminal comprises: a control circuit that determines, on the basis of a plurality of signals received from a plurality of transmission sources that carry out uplink cooperative communication, the uplink transmission power; and a transmission circuit that carries out uplink transmission via the determined transmission power.