Multi-Link BSS Parameter Management Through Unified AP Frames
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Solution Overview
Problem
Station multi-link devices may fail to obtain the latest critical BSS parameters during updates, leading to communication disruptions with APs in a multi-link device environment.
Innovation Solution
A method and apparatus for generating and transmitting frames that indicate specific critical BSS parameters, including channel switch announcements and bandwidth changes, to ensure that stations receive updated information and maintain communication with APs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple APs in an AP MLD update BSS parameters independently, then each AP can maintain its own parameter updates, but station devices may fail to obtain the latest information from all APs leading to communication failures
Solution Approach 1:
The patent combines BSS parameter information from multiple APs into a single unified frame structure. The transmitted AP includes BSS parameter information of itself and nontransmitted APs in the same Multiple BSSID set, allowing station devices to obtain all necessary information from a single source rather than requiring separate transmissions from each AP.
Solution Approach 2:
The transmitted AP acts as an intermediary that collects and redistributes BSS parameter information for both itself and nontransmitted APs. This intermediary approach ensures that station devices receive comprehensive updates without requiring direct communication with each individual AP, resolving the information distribution problem in multi-AP environments.
2Loss of energy
If nontransmitted APs do not send beacon frames, then network overhead is reduced, but station devices cannot receive critical BSS parameter updates from these APs
Solution Approach 1:
The transmitted AP serves as a mediator that receives and forwards BSS parameter information on behalf of nontransmitted APs. This allows nontransmitted APs to maintain their energy-saving mode without sending beacon frames while ensuring that station devices still receive critical parameter updates through the transmitting AP's frame transmissions.
Solution Approach 2:
The transmitted AP performs multiple functions: it transmits its own BSS parameters while simultaneously carrying and distributing BSS parameter information for nontransmitted APs in the same Multiple BSSID set. This multi-functionality resolves the contradiction by enabling information dissemination without requiring additional transmissions from energy-constrained nontransmitted APs.
3Reliability
If all APs transmit BSS parameter information independently, then each AP ensures its information is received, but network overhead and redundancy increase significantly
Solution Approach 1:
The patent merges BSS parameter information from multiple APs into a single consolidated frame transmitted by the transmitted AP. This combining approach maintains information delivery reliability for all APs while eliminating redundant transmissions, as station devices receive all necessary parameters in one unified message rather than multiple separate transmissions.
Solution Approach 2:
The transmitted AP's frame serves multiple purposes: it conveys the transmitted AP's own parameters while simultaneously distributing parameters for nontransmitted APs. This universal approach ensures comprehensive information delivery without proportionally increasing transmission volume, as a single frame performs the work of multiple separate transmissions.
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.