Trigger Frame MRU Indication for Efficient Wi-Fi RU Allocation

Solution Overview

Problem

In wireless local area networks, non-access point stations occupy an entire channel for data transmission, leading to reduced frequency utilization efficiency, and there is a need for efficient allocation of multiple resource units to stations for uplink data transmission.

Innovation Solution

A method for allocating multiple resource units (MRUs) to non-access point stations using a trigger frame with a frequency band range indication and resource unit indication, reducing the number of indexes required for indication by indicating the frequency band range in which the smallest RU is located.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If the resource unit allocation subfield uses traditional indication methods to allocate multiple resource units, then the number of indexes required increases, but the indication efficiency and processing complexity increase accordingly

Engineering Contradiction:

Improvenumber of resource units allocatedVSAvoidprocessing complexity

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The patent segments the resource unit indication into two parts: a frequency band range indication (indicating where the smallest RU is located) and a resource unit indication (indicating which MRU within that range is allocated). This segmentation reduces the number of indexes needed compared to indicating each RU separately across the entire bandwidth.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a frequency band range dimension to the resource unit indication. Instead of using a single flat index across the entire bandwidth, the indication is organized in a two-dimensional structure: first specifying the frequency band range, then specifying the MRU within that range. This dimensional change reduces the total number of indexes required.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Quantity of substance

If the resource unit allocation subfield uses traditional indication methods, then all resource units can be indicated, but the number of indexes required for indication increases

Engineering Contradiction:

Improvenumber of resource units allocatedVSAvoidnumber of indexes required

Core Design Contradiction:

Quantity of substanceVSLoss of information

Solution Approach 1:

The patent segments the resource unit indication into two parts: a frequency band range indication (indicating where the smallest RU is located) and a resource unit indication (indicating which MRU within that range is allocated). This segmentation reduces the number of indexes needed compared to indicating each RU separately across the entire bandwidth.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a frequency band range dimension to the resource unit indication. Instead of using a single flat index across the entire bandwidth, the indication is organized in a two-dimensional structure: first specifying the frequency band range, then specifying the MRU within that range. This dimensional change reduces the total number of indexes required.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Ease of operation

If non-access point stations occupy an entire channel for data transmission, then channel access is simplified, but frequency utilization efficiency decreases

Engineering Contradiction:

Improvechannel access simplicityVSAvoidfrequency utilization efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The patent segments the channel into multiple resource units (RUs) of different sizes, allowing multiple non-AP STAs to transmit simultaneously on different RUs. This segmentation enables frequency division multiple access (FDMA), improving frequency utilization efficiency while maintaining relatively simple channel access through trigger frame-based scheduling.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent enables dynamic RU allocation where the AP can flexibly assign different RU sizes and combinations to different non-AP STAs based on their data transmission needs. This dynamic allocation optimizes frequency utilization while allowing stations to access the channel efficiently through scheduled transmissions.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20260059511A1Resource unit indication method, access point, and station

Publication Date: 2026.02.26 HUAWEI TECH CO LTD

AI summary

This application provides a resource unit indication method, an access point, and a station. In the method, a resource unit allocation subfield in a trigger frame includes a frequency band range indication and a resource unit indication. The resource unit indication is used to indicate an MRU allocated to a station. The frequency band range indication is used to indicate a frequency band range in which an RU in the MRU is located. For example, the frequency band range indication is used to indicate 80 MHz in which a smallest RU in the MRU is located. It may be learned that this application may be applied to 802.11ax, 802.11be, and a future Wi-Fi system.