Monday, June 19, 2017

WiFi: Load balancing through probe response control

Basic Idea:
Clients use probe requests as one of the first frames before connecting to an access point (AP). If the AP does not respond with a probe-response frame, the client will not proceed with the connection. We leverage this condition to control how clients are distributed across multiple access points in the network. This approach to client - balancing has the advantage that:
1. Load both RF and CPU are balanced across the APs.
2. No disconnect/connect is required for load balancing.
3. Leverages the fact that typical WLAN mobility is pseudo-static. So clients will not move significantly from the places where they connect. Even in case of mobility, the disruption is minimal.