Wireless P2P Communication With AP-Managed TXOP QoS

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Solution Overview

Problem

Existing wireless local area network (WLAN) systems face challenges in efficiently managing peer-to-peer (P2P) communication, particularly in heavily loaded environments, where latency-sensitive traffic is disrupted due to unregulated or unmanaged traffic competing for resources, leading to inadequate delivery of Quality of Service (QoS) for P2P communications.

Innovation Solution

A mechanism where a first station (STA) requests resources from an access point (AP) for P2P transmissions on behalf of itself or other STAs, using Quality of Service (QoS) requirements, and the AP allocates transmission opportunities (TXOPs) during target wake times (TWTs) to ensure timely delivery of P2P traffic, employing SCS negotiation procedures to manage QoS expectations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If unregulated traffic is allowed to compete for resources in WLAN, then network flexibility and device autonomy are maintained, but QoS for latency-sensitive P2P traffic deteriorates

Engineering Contradiction:

Improvenetwork flexibilityVSAvoidQoS for P2P traffic

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces an intermediary mechanism where a first STA acts as a mediator to request resources from the AP on behalf of a second STA for P2P transmissions. This intermediary approach allows the system to maintain device autonomy while ensuring QoS for latency-sensitive traffic by having a designated representative negotiate resource allocation with the central coordinator (AP).

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent implements preliminary action by allowing STAs to request and allocate transmission opportunities (TXOPs) in advance for P2P communications. The first STA sends resource requests to the AP before the actual P2P transmission occurs, enabling the system to pre-reserve resources and guarantee QoS for latency-sensitive applications before traffic competition begins.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If resources are allocated through centralized AP management, then QoS for P2P traffic is improved, but network complexity and overhead increase

Engineering Contradiction:

ImproveQoS for P2P trafficVSAvoidresource management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies universality by enabling the first STA to perform multiple functions: it acts as both a regular communication endpoint and as a resource negotiator for the second STA. This multi-functionality reduces the need for separate dedicated negotiation entities, simplifying the overall system architecture while maintaining centralized resource management benefits.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent implements self-service by allowing STAs to autonomously request and manage their own transmission resources through the SCS negotiation procedure. The first STA independently formulates and sends resource requests to the AP, and upon receiving TXOP allocations, autonomously coordinates with the second STA for P2P transmissions, reducing the need for complex centralized scheduling while ensuring QoS.

Inventive Principle:

Principle #25Self-service

3Loss of time

If TXOP allocation is implemented for P2P transmissions, then delivery timeliness of latency-sensitive traffic is improved, but protocol overhead and negotiation complexity increase

Engineering Contradiction:

Improvedelivery timelinessVSAvoidprotocol overhead

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The patent merges the resource negotiation for P2P traffic with the existing SCS (Service Classification and Selection) procedure already used for infrastructure traffic. By combining these negotiation processes into a unified framework, the patent reduces protocol overhead and avoids duplicating negotiation mechanisms, while still achieving timely delivery through TXOP allocation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements periodic action through TWT (Target Wake Time) service periods, where resource allocations are established in advance and executed periodically. This allows latency-sensitive P2P traffic to occur at predetermined intervals without continuous negotiation, reducing protocol overhead while ensuring timely delivery during the allocated periodic windows.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS20250211635A1Peer-to-peer communication in wireless networks

Publication Date: 2025.06.26 SAMSUNG ELECTRONICS CO LTD

AI summary

A station (STA) in a wireless network transmits, to an access point (AP), a stream classification service (SCS) request for itself and on behalf of another peer STA. The STA receives, from the AP, a first SCS response for the SCS request for STA and a second SCS response for the SCS request for peer STA. STA or peer STA may receive a trigger frame granting a transmission opportunity (TXOP) via the P2P direct link established between the STA and the peer STA, if the AP accepts the SCS request associated with that STA.