Multi-channel Access Point Spectrum Management via Beacon Announcements
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Solution Overview
Problem
Current wireless communication systems lack a method to effectively manage the spectrum of multi-band systems, particularly in assigning or switching a client device to a different band, which affects quality of service and interference management.
Innovation Solution
A method for managing the spectrum in multi-channel wireless communication systems involves exchanging information between a client and a multi-channel access point regarding capabilities and working channels in different bands, allowing for seamless band switching based on link quality metrics and load balancing, without the need for clients to scan for radar presence in the new band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a client device scans the spectrum before association to see the AP in both bands, then the client can identify available bands, but the scanning time increases and complexity increases
Solution Approach 1:
The access point performs preliminary action by announcing its multi-band capabilities and working channels in advance through beacon frames before the client needs to switch bands. This allows the client to have information ready without performing time-consuming spectrum scans when band switching is needed.
2Reliability
If the client performs spectrum scanning to find the AP in a new band, then the client can locate the AP, but the scanning time and system complexity increase
Solution Approach 1:
The access point acts as an intermediary by providing information about its presence and working channels in other bands through beacon frames. This eliminates the need for the client to perform complex spectrum scanning procedures, as the AP directly communicates its availability in different bands.
3Ease of operation
If the AP uses the same SSID and BSSID in both bands for ease of operation, then the operation is simplified, but the ability to manage spectrum and assign clients to specific bands is reduced
Solution Approach 1:
The system segments the spectrum management by allowing the AP to announce different working channels for different bands through beacon frames. While the same SSID and BSSID maintain ease of operation, the segmented channel information enables flexible spectrum management and client assignment to specific bands or channels.
4Speed
If the client switches bands without knowing the AP's capabilities in the new band, then the band switching is fast, but communication may fail due to incompatible capabilities
Solution Approach 1:
The access point performs preliminary action by including capability information for multiple bands in its beacon frames. This allows the client to switch bands quickly while having advance knowledge of the AP's capabilities in the target band, ensuring communication reliability without sacrificing switching speed.
Data Source
AI summary
System and method for managing the spectrum of a multi-channel wireless communication system. Information related to other channels and bands is exchanged between a client associated to a first channel of the multi-channel wireless communication system and a multi-channel access point. The information includes, inter alia, capabilities of the access point and the client, working channel information of the access point, link quality metrics of the client in the other bands etc.