Multi-AP Multi-Link Association for Reliable Low-Latency Wi‑Fi
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Solution Overview
Problem
The capabilities of access point multi-link devices (AP MLDs) are insufficient to meet transmission requirements, particularly in scenarios requiring high-reliability, high-data-rate, and low-latency communications, due to signal interference and unstable links in dense AP deployments.
Innovation Solution
A method for wireless communication that involves setting up multiple links between an AP MLD and a non-AP MLD, utilizing multi-AP coordination technologies such as joint transmission (J-TX), coordinated orthogonal frequency division multiple access (C-OFDMA), and coordinated beamforming (C-BF) to enhance communication reliability and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple links are set up between AP MLD and non-AP MLD, then communication reliability and data rate are improved, but device complexity increases
Solution Approach 1:
The system segments the communication connection into multiple independent links (first link, second link, etc.) between the first AP MLD and first non-AP MLD, and between the second AP MLD and first non-AP MLD. Each link can operate independently, allowing the system to achieve high reliability through redundancy while managing complexity through modular link management.
Solution Approach 2:
The patent merges multiple AP MLDs (first AP MLD, second AP MLD) into a coordinated system that jointly serves the first non-AP MLD. By combining the resources and capabilities of multiple AP MLDs, the system achieves improved communication reliability and data rate while distributing the complexity across multiple coordinated devices.
2Reliability
If multi-AP coordination technologies (J-TX, C-OFDMA, C-BF) are implemented, then communication reliability and latency are improved, but device complexity increases
Solution Approach 1:
The system performs preliminary actions by establishing multiple links and coordinating multi-AP operations before actual data transmission occurs. The first AP MLD and second AP MLD pre-establish their coordination mechanisms (J-TX, C-OFDMA, C-BF) so that when communication is needed, the complex coordination is already in place, reducing real-time complexity.
Solution Approach 2:
The patent implements feedback mechanisms where the first AP MLD receives first feedback information from the first non-AP MLD and second feedback information from the second non-AP MLD. This feedback enables dynamic adjustment of coordination parameters, allowing the system to manage complexity through adaptive control based on real-time channel conditions.
3Productivity
If multiple links are established for high-data-rate transmission, then productivity is improved, but loss of time for link setup increases
Solution Approach 1:
The system establishes multiple links and coordination mechanisms in advance before actual high-data-rate transmission begins. The first AP MLD and second AP MLD pre-set up their multi-link connections with the first non-AP MLD and second non-AP MLD, so that when data transmission is needed, the infrastructure is already in place and ready for immediate high-speed operation.
Solution Approach 2:
The patent enables continuous useful action by maintaining multiple active links that can immediately begin data transmission without sequential setup delays. The first link, second link, and their corresponding AP MLDs operate concurrently and continuously, eliminating the need to wait for sequential link establishment and maximizing productivity.
Data Source
AI summary
A method for wireless communication and a device are provided. The method for wireless communication includes receiving, by a first AP MLD, an association request frame sent by a first non-AP MLD. The association request frame is used to request association with a target multi-AP MLD candidate set, and the association request frame contains first multi-link information, where the first multi-link information indicates information of multiple links that the first non-AP MLD requests to set up between the first non-AP MLD and the first AP MLD, and the target multi-AP MLD candidate set is a multi-AP MLD candidate set to which the first AP MLD belongs.