WLAN wireless channels are vulnerable to interference in surrounding radio environments, and the service quality is therefore degraded. If interference detection is configured, a monitor AP can know the radio environment in real time and report alarms to the AC in a timely manner.
Interference detection enables an AP to detect AP co-channel interference, AP adjacent-channel interference, and STA interference.
- AP co-channel interference: Two APs working on the same frequency band interfere with each other. For example, on a large-scale WLAN (a university campus network), different APs often use the same channel. When there are overlapping areas among these APs, co-channel interference exists, degrading network performance.
- AP adjacent-channel interference: Two APs with different center frequencies have overlapping areas, resulting in adjacent-channel interference. Therefore, if APs are placed too close to each other or they have strong signals, more noise will be produced, degrading network performance.
- STA interference: If there are many STAs that are managed by other APs around an AP, services of the STAs managed by the local AP may be affected.