R-TWT Access Grant for Non-Member STA Burst Traffic

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Solution Overview

Problem

Current wireless communication systems using R-TWT SPs prioritize RTA traffic transmission, but non-AP STAs without R-TWT membership face limited channel access during R-TWT SPs, leading to delays in transmitting urgent burst traffic.

Innovation Solution

Non-AP STAs can negotiate temporary or long-term R-TWT membership or setup a new R-TWT SP during an ongoing R-TWT SP to prioritize urgent traffic transmission, using mechanisms like UORA and frame exchanges to request and establish membership.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If R-TWT SP is scheduled for RTA frame exchange, then priority delivery of scheduled RTA frames is improved, but unscheduled RTA frames suffer significant delay

Engineering Contradiction:

Improvedelivery reliability of scheduled RTA framesVSAvoiddelay of unscheduled RTA frames

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by establishing R-TWT membership in advance through negotiation between non-AP STA and AP. The STA initiates R-TWT setup frames before the actual data transmission to secure membership and ensure priority access for urgent burst traffic, rather than waiting until the traffic needs to be transmitted

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamics by allowing flexible transition between scheduled and unscheduled states. Non-AP STAs can dynamically negotiate R-TWT membership during ongoing R-TWT SPs or before their scheduled SPs, enabling the system to adapt to urgent traffic needs while maintaining the structured R-TWT framework

Inventive Principle:

Principle #15Dynamics

2Speed

If non-AP STA contends for RA-RU in current R-TWT SP, then urgent traffic can be transmitted immediately, but channel access priority is reduced compared to R-TWT members

Engineering Contradiction:

Improvetransmission speed of urgent trafficVSAvoidchannel access priority

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The patent applies preliminary action by having non-AP STAs negotiate R-TWT membership in advance through setup frames exchanged before the R-TWT SP. This preliminary negotiation ensures that when urgent traffic arrives, the STA already has membership status and can access the channel with high priority rather than contending as a non-member

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses R-TWT membership status as an intermediary mechanism that mediates between the need for immediate urgent transmission and the channel access priority structure. By becoming a member (even temporarily), the STA gains intermediary status that guarantees priority access during the R-TWT SP

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12538291B2Non-R-TWT member STA access grant for burst traffic transmission

Publication Date: 2026.01.27 SONY GROUP CORP

AI summary

A non-AP STA, which is a scheduled STA having membership in an R-TWT scheduled STA, having an enqueued urgent burst of RTA traffic for the AP during an ongoing R-TWT SP of which it does not have R-TWT membership, is enabled to initiate R-TWT negotiation with the scheduling AP inside the ongoing R-TWT SP to either request a temporary or a long-term membership of the current ongoing R-TWT SP or request to setup a new temporary or long-term R-TWT SP after the current SP, but before the SP it originally had membership in, or to contend for an RA-RU in the current R-TWT SP if UORA feature is enabled. Thus, a non-R-TWT member STA is granted access for its burst traffic transmissions.