SCS R-TWT Setup for Low-Latency Multi-Link Wi-Fi Traffic

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current wireless technologies, such as IEEE 802.11be, prioritize high throughput but fail to provide sufficient low latency performance, which is essential for real-time applications requiring timely packet delivery.

Innovation Solution

A protocol that allows stations (STAs) to request scheduling a Restricted Target Wait Time (R-TWT) during the Stream Classification Service (SCS) setup, enabling differentiated management of Real Time Application (RTA) and non-RTA traffic to meet QoS requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If CSMA/CA protocol prioritizes high throughput performance, then network throughput is improved, but latency performance deteriorates

Engineering Contradiction:

Improvenetwork throughputVSAvoidlatency

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent segments traffic into RTA packets requiring low latency and non-RTA packets for high throughput, applying different handling mechanisms to each category through stream classification service

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements periodic Target Wait Time (TWT) intervals where stations wake up at scheduled times to transmit data, creating regular transmission opportunities that reduce latency while maintaining overall throughput

Inventive Principle:

Principle #19Periodic action

2Loss of time

If R-TWT scheduling is implemented during SCS setup, then low-latency performance for RTA packets is improved, but device complexity increases

Engineering Contradiction:

Improvelatency for RTA packetsVSAvoidprotocol complexity

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The patent merges the TWT setup procedure with the Stream Classification Service (SCS) setup by including TWT element in SCS request and response frames, allowing both services to be established simultaneously through a single interaction sequence

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The SCS setup frames are enhanced to serve dual purposes: establishing stream classification parameters and configuring TWT scheduling, making the communication protocol multi-functional and reducing the need for separate setup procedures

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12495363B2Stream classification service (SCS) with restricted target wait time (R-TWT) setup

Publication Date: 2025.12.09 SONY GROUP CORP

AI summary

An IEEE 802.11 protocol in which the necessity and issues surrounding separately setting up SCS and reserving target wait time (R-TWT) are eliminated. In the present disclosure new data structures and processes are performed in which a station (STA) can request scheduling R-TWT for the traffic transmission of a stream classification service (SCS) during the setup procedure of that SCS. In using the teachings of the present disclosure, a STA can exchange a TWT setup frame on one link to schedule R-TWT on multiple links.