Interference Measurement in Multi-Link WLAN Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In next-generation wireless local area networks (WLANs), the issue of mutual adjacent-band interference between stations connected to an access point via different links affects normal data reception, leading to reduced system throughput.
Innovation Solution
An interference measurement station and method that involves stations and an access point to exchange measurement signals and results, including identifiers and interference information, to identify and mitigate cross-link interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-link aggregation is used to increase peak rate, then system throughput is improved, but cross-link interference between stations occurs
Solution Approach 1:
The access point performs preliminary actions by broadcasting interference measurement notification frames before data transmission, indicating to stations which links may experience interference. This allows stations to proactively adjust their transmission strategies on affected links, preventing interference from degrading the multi-link aggregation performance.
Solution Approach 2:
The patent implements a feedback mechanism where the access point collects interference measurement results from stations, processes this information, and uses it to generate interference information that is fed back to relevant stations. This closed-loop feedback enables dynamic adjustment of link selection and transmission parameters, resolving the contradiction between maintaining high throughput and avoiding interference.
2Productivity
If stations are physically close or working links are close in frequency, then link utilization is improved, but mutual adjacent-band interference is caused
Solution Approach 1:
Stations measure interference on their working links and feed back measurement results to the access point. The access point uses this feedback to identify interference patterns and adjust link assignments, allowing stations to operate close in frequency while maintaining low interference through dynamic link management.
Solution Approach 2:
The system dynamically adjusts link selection and transmission parameters based on real-time interference measurements and access point scheduling decisions. This dynamic adaptation allows the system to exploit frequency proximity for higher utilization while avoiding sustained interference conditions through continuous reconfiguration.
Data Source
AI summary
Embodiments of this application disclose an interference measurement station, access point, and method, where the method includes: A second station receives, on a second link, a measurement signal sent by a first station on a first link. The second station generates a measurement result based on the received measurement signal. The second station sends the measurement result to an access point. The embodiments of this application can be used to facilitate scheduling of communication between different stations by the access point, to reduce a collision probability between stations that interfere with each other, and to improve an overall system throughput.