Band Steering via Probe Detection for Multi-Band Clients
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Solution Overview
Problem
Wireless access point devices face challenges in managing bandwidth efficiently due to the increased number of wireless clients connecting across multiple communication bands, often steering clients to non-preferred bands, which can result in denied connections or slow initial associations.
Innovation Solution
An access point device with processing circuitry that detects multi-band capability in wireless clients through probe requests, implements pre-association and post-association steering using methods like BSS transition, ECSA, and force re-connect to steer clients to preferred communication bands, ensuring efficient bandwidth management without denying connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the access point device steers a wireless client to a specific communication band, then bandwidth management efficiency is improved, but the wireless client may be denied connection or experience slow initial association
Solution Approach 1:
The access point device performs preliminary actions by detecting multi-band capability through probe requests before steering the client. This preliminary detection allows the system to prepare appropriate steering strategies in advance, ensuring that single-band clients are not mistakenly steered away from their only compatible band, thereby maintaining connection reliability while enabling bandwidth management for multi-band clients
2Productivity
If the access point device steers a wireless client to a preferred communication band, then bandwidth management is improved, but single-band clients experience delays during initial association
Solution Approach 1:
The system performs preliminary detection of multi-band capability through probe requests before the association process begins. This preliminary action allows the access point to identify single-band clients early and exclude them from steering operations, preventing any association delays while enabling efficient bandwidth management for multi-band clients that can be steered to preferred bands
Data Source
AI summary
An access point device operable in a wireless network detects multi-band capability of a wireless client based on a probe request received from the wireless client on the non-preferred communication band. The multi-band capability is detected based on a set of parameters included in the received probe request. When the wireless client is detected to have the multi-band capability, the access point device blocks the attempt of the first wireless client to associate on the non-preferred communication band. The access point device allows the wireless client to associate on one of the non-preferred communication band and a preferred communication band based on a count of probe requests received by the access point device from the wireless client on the non-preferred communication band. Upon association on the non-preferred communication band, the access point device steers the associated wireless client to the preferred communication band.