Wireless STA QoS Estimation Using R-TWT Scheduling

Solution Overview

Problem

Existing wireless communication systems face challenges in effectively managing and prioritizing delay-sensitive traffic flows due to transmissions from non-R-TWT supporting STAs and legacy STAs, leading to unpredictable delays and reduced reliability in QoS parameter estimation.

Innovation Solution

A mechanism for estimating QoS parameters based on scheduling capabilities of an AP, providing information on recommended traffic flow characteristics and STA/link operations to optimize delay-sensitive traffic flow transmission by selecting appropriate APs or links and participating in specific R-TWT schedules.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If QoS parameter estimation is performed in existing wireless communication systems, then transmission performance can be improved, but unpredictable delays occur due to transmissions from non-R-TWT supporting STAs and legacy STAs

Engineering Contradiction:

ImproveQoS parameter estimation reliabilityVSAvoidunpredictable delays

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent segments the wireless network into R-TWT supporting STAs and non-R-TWT supporting STAs (including legacy STAs). R-TWT supporting STAs participate in restricted Target Wake Time schedules that provide guaranteed transmission opportunities with predictable delays, while non-R-TWT STAs operate separately without interfering with the QoS guarantees of R-TWT STAs. This segmentation resolves the contradiction by isolating the unpredictable delay sources from the QoS-critical traffic flows.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces R-TWT (Restricted Target Wake Time) schedules as an intermediary mechanism that mediates between R-TWT supporting STAs and non-R-TWT supporting STAs. The R-TWT mechanism creates protected time periods where R-TWT STAs can transmit with guaranteed QoS parameters, while non-R-TWT STAs are restricted from transmitting during these protected periods. This intermediary structure enables reliable QoS parameter estimation for delay-sensitive traffic by filtering out interference from legacy STAs.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If QoS parameter estimation is performed in existing wireless communication systems, then transmission performance can be improved, but reduced reliability occurs due to transmissions from non-R-TWT supporting STAs and legacy STAs

Engineering Contradiction:

Improvetransmission performanceVSAvoidQoS parameter estimation reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent segments the wireless network into R-TWT supporting STAs and non-R-TWT supporting STAs (including legacy STAs). R-TWT supporting STAs participate in restricted Target Wake Time schedules that provide guaranteed transmission opportunities with predictable delays, while non-R-TWT STAs operate separately without interfering with the QoS guarantees of R-TWT STAs. This segmentation resolves the contradiction by isolating the unpredictable delay sources from the QoS-critical traffic flows.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces R-TWT (Restricted Target Wake Time) schedules as an intermediary mechanism that mediates between R-TWT supporting STAs and non-R-TWT supporting STAs. The R-TWT mechanism creates protected time periods where R-TWT STAs can transmit with guaranteed QoS parameters, while non-R-TWT STAs are restricted from transmitting during these protected periods. This intermediary structure enables reliable QoS parameter estimation for delay-sensitive traffic by filtering out interference from legacy STAs.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If R-TWT schedules are implemented for delay-sensitive traffic flows, then predictable delays and higher reliability are achieved, but device complexity increases

Engineering Contradiction:

Improvedelay prediction accuracyVSAvoidscheduling mechanism complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by establishing R-TWT schedules in advance before delay-sensitive traffic flows need to be transmitted. During the association or reassociation process, STAs exchange capability information and negotiate R-TWT parameters beforehand. This preliminary setup creates pre-allocated transmission opportunities with guaranteed QoS parameters, eliminating the need for complex real-time scheduling decisions during actual data transmission. The complexity is shifted to the initial setup phase rather than ongoing operation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent enables self-service by allowing R-TWT supporting STAs to autonomously identify their capability status and automatically participate in R-TWT schedule formation without requiring complex centralized scheduling control. STAs exchange capability information during association/reassociation and self-organize into R-TWT groups based on their capabilities. This self-service approach reduces the complexity of the scheduling mechanism while maintaining reliable delay prediction for delay-sensitive traffic flows.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20260081873A1Wireless communication method, and station

Publication Date: 2026.03.19 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

Provided are a wireless communication method, and a station (STA). The method is performed by an STA, and includes: receiving first information; wherein the first information comprises at least quality of service (QoS) parameter information for traffic flow transmission supported by a first access point (AP) on a first channel.