Client balancing in wireless networks

Claim 1

A method of client balancing in a wireless digital network comprising a plurality of access nodes connected to a controller, the method comprising: identifying a Virtual RF neighborhood for each of the plurality of access nodes connected to the controller, the Virtual RF neighborhood of one access node being a subset of a RF neighborhood of the one access node, the RF neighborhood of the one access node including one or more access nodes that hear beacons from the one access node; using the Virtual RF Neighborhood information for a target access node to determine if the target access node is overloaded; and enabling client load balancing on the target access node if the target access node is overloaded, the target access node being overloaded if a load on the target access node exceeds a load in the Virtual RF neighborhood by a first predetermined threshold, whereby the target access node initially rejects new association requests from a wireless client; wherein the step of identifying the Virtual RF neighborhood comprises the steps of: collecting for a predetermined period of time client density data in each of the plurality of access nodes connected to the controller, sending the client density data from the each of the plurality of access nodes to the controller on a periodic basis, and computing at the controller the Virtual RF neighborhoods for each of the plurality of the access nodes by: selecting the client density data for pairs of access nodes, and testing the pairs of client density data to see if the client density overlap between the pairs of client density data exceeds a second predetermined threshold, and identifying the pair of access nodes as Virtual RF neighbors if the second threshold is exceeded.

Claim 2

A method of client balancing in a wireless digital network comprising a plurality of access nodes connected to a controller, the method comprising: identifying a Virtual RF neighborhood for each of the plurality of access nodes connected to the controller, the Virtual RF neighborhood of one access node being a subset of a RF neighborhood of the one access node, the RF neighborhood of the one access node including one or more access nodes that hear beacons from the one access node; using the Virtual RF Neighborhood information for a target access node to determine if the target access node is overloaded; and enabling client load balancing on the target access node if the target access node is overloaded, the target access node being overloaded if a load on the target access node exceeds a load in the Virtual RF neighborhood by a first predetermined threshold, whereby the target access node initially rejects new association requests from a wireless client; wherein the step of identifying the Virtual RF neighborhood comprises the steps of: collecting for a predetermined period of time client density data in each of the plurality of access nodes connected to the controller, sending the client density data from the each of the plurality of access nodes to the controller on a periodic basis, and computing at the controller the Virtual RF neighborhoods for each of the plurality of the access nodes by: selecting the client density data for pairs of access nodes, and testing the pairs of client density data to see if the client density overlap between the pairs of client density data exceeds a second predetermined threshold, and identifying the pair of access nodes as Virtual RF neighbors if the second threshold is exceeded.