Multi-Link BSS Parameter Updates for Reliable STA Synchronization
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Solution Overview
Problem
In wireless local area networks, when a BSS of an access point multi-link device is updated, some station multi-link devices fail to obtain the latest BSS information, leading to communication failures with the APs.
Innovation Solution
A method and apparatus for managing critical BSS parameters across multiple links, where APs in a multi-link device generate frames indicating critical BSS parameter updates, allowing stations to determine if parameters have changed, and providing specific parameters to ensure seamless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an AP MLD updates BSS parameters across multiple links, then the BSS information becomes more current and accurate, but some STAs fail to receive the updates and communication breaks down
Solution Approach 1:
The patent introduces an intermediary mechanism where a transmitting AP acts as a mediator to relay critical BSS parameter update information to STAs. When an AP cannot directly notify STAs of parameter changes, the transmitting AP includes the update information in frames it sends to STAs, ensuring the information reaches its destination through a reliable intermediary channel.
Solution Approach 2:
The patent implements multi-functionality by enabling frames to serve multiple purposes: they simultaneously carry data transmission and BSS parameter update notification functions. The critical BSS parameter update information is embedded within existing frame structures, allowing a single frame to perform both data communication and parameter synchronization tasks.
2Reliability
If critical BSS parameter update information is embedded in frames, then STAs can reliably receive updates, but the frame structure becomes more complex
Solution Approach 1:
The patent merges the BSS parameter update notification function with existing data transmission frames. Instead of creating separate notification frames, the critical BSS parameter update information is combined into the same frame structure already used for data communication, reducing overall system complexity while maintaining reliability.
Solution Approach 2:
The frame structure is designed to be multi-functional, serving both as a data transmission vehicle and a parameter update notification mechanism. This universality eliminates the need for separate specialized frames, thereby avoiding increased complexity while ensuring reliable parameter delivery.
Data Source
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AI summary
This application relates to the wireless communication field, and in particular, to critical BSS parameter management method applicable to multiple links and a related apparatus which are applied to, for example, a wireless local area network supporting the 802.11be standard. The method includes: A first AP in a first AP MLD generates and sends a first frame, where the first frame indicates critical BSS parameter update count values corresponding to a plurality of APs in the first AP MLD and critical BSS parameter update count values corresponding to a plurality of APs in a second AP MLD, and the second AP MLD is an AP MLD to which a nontransmitted AP belongs in a multiple BSSID set including the first AP. This helps some APs or all APs in some AP MLDs notify STAs managed by the APs whether critical BSS parameters of BSSs managed by the APs are updated, to assist the STAs in receiving a latest critical BSS parameter.