Multi-Link AP BSS Update Signaling for STA Detection
Find Innovative SolutionsGenerate Solutions
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 critical BSS parameters, leading to communication issues 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 update information, allowing stations to determine if parameters have been updated and receive the latest information, thereby facilitating normal communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a BSS of an AP in an AP MLD is updated, then the critical BSS parameters are changed to improve service transmission, but some STAs fail to obtain the latest information leading to communication failure
Solution Approach 1:
The patent segments the BSS parameter update notification into two distinct parts: a critical BSS parameter update count value (for quick change detection) and detailed critical BSS parameter information (for complete parameter updates). This segmentation allows STAs to efficiently detect changes without always requiring full parameter transmission, resolving the contradiction between maintaining communication reliability and preventing information loss.
Solution Approach 2:
The patent implements preliminary action by having the AP send the critical BSS parameter update count value in advance through beacon frames or announcement frames. This preliminary notification allows STAs to proactively detect parameter changes and initiate parameter updates before communication failures occur, thereby maintaining communication reliability while ensuring STAs obtain the latest information.
2Reliability
If all APs in an AP MLD send update notifications independently, then each AP can notify its STAs, but the system complexity increases and some nontransmitted APs cannot send notifications
Solution Approach 1:
The patent applies universality by enabling any transmitted AP in the AP MLD to serve as a notification sender for all APs in the set. Instead of requiring each AP to independently send notifications, any transmitted AP can broadcast the critical BSS parameter update count value for the entire AP MLD, making the notification function universal and eliminating the limitation of nontransmitted APs while reducing system complexity.
Solution Approach 2:
The patent introduces an intermediary mechanism where transmitted APs act as mediators that relay critical BSS parameter update information for the entire AP MLD. These intermediary APs receive update information and broadcast notifications to all associated STAs, enabling nontransmitted APs to communicate parameter changes indirectly through the intermediary transmitted APs, thus maintaining notification reliability without increasing individual AP complexity.
Data Source
Figure 1~2
Figure 3a~3b
Figure 3c
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.