Critical BSS Update Counts for Multi-Link WLAN Stations
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Solution Overview
Problem
In wireless local area networks (WLANs) with multi-link devices (MLDs), station devices may fail to obtain updated critical BSS parameters, leading to communication issues with access points (APs) due to the lack of timely information about parameter updates.
Innovation Solution
A method and apparatus for managing critical BSS parameters across multiple links, where APs generate frames indicating update information and specific parameters to ensure stations receive the latest updates, facilitating normal communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a BSS of an AP in an access point multi-link device is updated, then the critical BSS parameters are changed to improve service transmission rate and throughput, but some station multi-link devices or stations fail to obtain latest information of BSSs, leading to communication failure
Solution Approach 1:
The patent segments the BSS parameter update notification into two parts: a first indication information containing a first count value for parameters in the current AP MLD, and a second indication information containing a second count value for parameters in another AP MLD. This segmentation allows stations to efficiently track parameter updates across multiple AP MLDs without receiving redundant full parameter sets, thus preventing information loss while maintaining high productivity.
Solution Approach 2:
The patent implements a feedback mechanism where APs send indication information containing count values that reflect the current state of BSS parameters. Stations compare these count values with previously stored values to determine whether parameter updates have occurred. This feedback loop ensures stations always obtain the latest BSS parameter information, resolving the information loss problem while supporting high-speed service transmission.
2Productivity
If multiple APs in different AP MLDs update their BSS parameters simultaneously, then the system achieves multi-station diversity gains and improved throughput, but stations cannot normally communicate with special APs due to failure to obtain updated information
Solution Approach 1:
The patent creates a universal notification mechanism where indication information can convey BSS parameter update status for multiple AP MLDs simultaneously. The first indication information and second indication information work together to provide a unified view of parameter updates across the entire multi-link system, enabling stations to maintain reliable communication with all APs while benefiting from multi-station diversity gains and improved throughput.
3Ease of operation
If the system uses traditional BSS parameter update notification methods, then individual APs can notify their managed STAs of parameter updates, but some nontransmitted APs cannot send management frames to notify critical BSS parameter updates
Solution Approach 1:
The patent introduces an intermediary mechanism where transmitted APs act as mediators for nontransmitted APs. The first indication information sent by transmitted APs includes not only their own parameter update status but also parameter update information for nontransmitted APs in the same AP MLD. This intermediary approach ensures that critical BSS parameter update information reaches all stations without requiring every AP to independently send notification frames, thus preventing information loss while maintaining ease of operation.
Data Source
AI summary
This application relates to the wireless communication field, and in particular, to critical basic service set (BSS) parameter management method applicable to multiple links and a related apparatus that are applied to, for example, a wireless local area network supporting the 802.11be standard. A first access point (AP) in a first access point multi-link device (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 basic service set identifier (BSSID) set including the first AP.