Multi-AP Shared TXOP Channel Switching for Interference Control
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Solution Overview
Problem
Existing multi-AP coordination in next-generation wireless communication systems face inefficiencies in AP candidate set maintenance, temporary primary channel switching, and shared AP selection during shared transmission opportunities (SH-TXOP), leading to potential channel interference and resource allocation issues.
Innovation Solution
The method involves setting conditions for APs to join the candidate set, temporarily switching primary channels within the basic service set (BSS) bandwidth, and using identical SH-TXOP switch frames to manage resource allocation and prevent interference among APs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple APs operate on overlapping channels during shared TXOP, then resource utilization increases, but channel interference increases
Solution Approach 1:
The shared TXOP bandwidth is segmented into non-overlapping channel subsets, with each shared AP assigned a distinct subset. This segmentation allows multiple APs to transmit simultaneously without interference while maintaining high resource utilization of the overall bandwidth.
Solution Approach 2:
Each shared AP is configured with specific local channel quality characteristics by assigning it a particular subset of non-overlapping channels. This local quality assignment ensures that each AP operates on channels optimized for its specific transmission requirements while avoiding interference with other APs.
2Adaptability or versatility
If shared APs switch primary channels dynamically, then coordination flexibility improves, but channel switching complexity increases
Solution Approach 1:
The primary channels of shared APs are pre-configured to be non-overlapping with each other before the shared TXOP begins. This preliminary action eliminates the need for dynamic channel switching during coordination, reducing complexity while maintaining flexibility through the pre-established non-overlapping configuration.
Solution Approach 2:
The system maintains coordination flexibility by allowing dynamic selection of which shared APs participate in each shared TXOP, while the underlying channel assignments remain static and non-overlapping. This dynamic participation selection provides adaptability without requiring complex channel switching operations.
3Adaptability or versatility
If AP candidate set includes all potential shared APs, then coordination options increase, but set maintenance overhead increases
Solution Approach 1:
The AP candidate set is segmented into multiple subsets, each associated with specific non-overlapping channel groups. This segmentation reduces the maintenance overhead by organizing APs into manageable groups based on their channel assignments, while still providing comprehensive coordination options across all subsets.
Solution Approach 2:
Instead of maintaining a single comprehensive candidate set, the system maintains multiple partial candidate sets corresponding to different channel subsets. This partial action approach reduces the maintenance overhead for each individual set while collectively providing extensive coordination options across all sets.
Data Source
AI summary
Disclosed is a method of setting conditions for an access point (AP) to be included in an AP candidate set of a coordinating AP for a transmission opportunity (TXOP), including setting a first primary channel of the AP as part of the AP candidate set of the coordinating AP within a basic service set (BSS) operating bandwidth of the coordinating AP, and coordinating AP updates in the AP candidate set when a coordinated AP that is part of the AP candidate set performs a channel switch to a second primary channel operating on a different bandwidth stream than a bandwidth stream of the first primary channel.