Multi-Link Station Direct Links to Reduce Wi-Fi AP Traffic
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Solution Overview
Problem
Existing wireless communication networks face challenges in high-density environments due to increased bandwidth and latency demands, particularly in multi-user schemes like 802.11ax, leading to undesirable collisions and inefficient resource use for bandwidth-demanding services such as video-based applications.
Innovation Solution
Establish direct peer-to-peer links between multi-link station devices in a wireless network, allowing data transfer without reliance on a central access point, thereby optimizing bandwidth and response time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is transferred through the access point in multi-link operation, then network coverage and management are improved, but bandwidth efficiency and response time deteriorate due to doubled air-time and increased medium access time
Solution Approach 1:
The patent extracts the direct link establishment capability from the traditional AP-mediated communication model. Non-AP MLEs are enabled to establish direct peer-to-peer links with each other, removing the mandatory routing through the AP for certain traffic types. This extraction allows bandwidth-intensive services to bypass the AP, reducing air-time consumption and improving throughput while maintaining AP-managed network coverage.
Solution Approach 2:
The access point serves as an intermediary that facilitates and manages direct links between non-AP MLEs without requiring all traffic to pass through it. The AP provides control plane functions for link establishment, maintenance, and teardown, while data plane traffic can flow directly between stations. This mediator role resolves the contradiction by maintaining network management reliability while enabling efficient direct data transfer.
2Productivity
If multi-user schemes are implemented to address bandwidth demands, then network capacity is improved, but collision rate and latency increase in high-density environments
Solution Approach 1:
The patent segments the communication paths into controlled AP-mediated links and direct peer-to-peer links. By dividing traffic types and routing paths, bandwidth-intensive services are segmented into direct links that bypass contention, while other traffic continues through the AP. This segmentation reduces collisions and latency for time-sensitive applications while maintaining overall network capacity.
3Productivity
If direct links are established between non-AP stations, then bandwidth efficiency and response time are improved, but device complexity and link management overhead increase
Solution Approach 1:
The access point is designed with multi-functionality, serving both as a traditional data forwarding node and as a control plane manager for direct links between non-AP MLEs. The AP handles link establishment, parameter negotiation, and teardown procedures, while stations focus on data transmission. This universal role distribution reduces device complexity at the station level while maintaining overall system efficiency.
Data Source
AI summary
The invention relates in one of its aspects to a method of communication in a wireless network comprising an access point multi-link device, AP MLD, and the wireless network further comprising a first and a second station multi-link devices, STA MLDs. The method comprising:establishing a first link between a station of the first STA MLD and an Access Point of the AP MLD;establishing a second link between a station of the second STA MLD and an Access Point of the AP MLD;establishing a third direct link between station of the first STA MLD and a station of the second STA MLD; andtransferring data between the first and the second STA MLDs through the third link.