Patent ID: 7912002
Filing Date: 2011-03-22
Classification: H04W

Abstract:
1. A system comprising: a candidate channel assessment module for obtaining at least one access class (AC)-specific channel suitability metric for each of two different channels, and for using the AC-specific channel suitability metrics to determine a channel suitability index of each of the two different channels; a channel selection module for using the channel suitability index to select one of the two different channels as a new channel; and a channel setting module for configuring a wireless transceiver to use the new channel, wherein the channel assessment module applies the following equations to generate the channel suitability index (CSI): where Ψ indicates a function defining the relative success in transmitting a packet error free and is defined as: where LQ indicates link quality and is defined as: where σ indicates a weight associated with a particular AC, the subscript ACI identifies AC index, RSSI indicates a mean received signal strength indicator, Ω indicates a function defining link robustness and is defined as: where erfc(.) indicates a complementary Gaussian error function, CF indicates contention-faced and is defined as: where τ indicates a weight associated with a particular AC, CU indicates channel utilization, APER indicates average packet error rate, N indicates the number of active STAs, and Γ is a function defining relative contention faced when trying to gain access to the wireless medium and is computed as: