Patent ID: 6185423
Filing Date: 2001-02-06
Classification: H04W,Y02D

Abstract:
A method of selecting a communication channel from a group of communication channels using a communication device, comprising:accessing a first list comprising a plurality of communication channels;scanning and measuring a first received signal strength of each channel in the first list;forming a second list comprising the channels of the first list having the first received signal strength equal to or greater than a first threshold signal strength;scanning and measuring a second received signal strength of each channel in the second list;ordering the second list in response to the second received signal strength;selecting a communication channel by comparatively evaluating a last used channel, a last attempted channel and a best channel according to the corresponding second received signal strength, wherein the last attempted channel is a previously selected channel selected for communication but for which communication is not established, wherein the best channel has the highest received signal strength in the second list; andperforming a background scan during at least one evaluation period, the background scan comprising scanning and measuring the channels of a currently used channel list, monitoring for one sweep cycle communication channels of the currently used channel list having a received signal strength equal to or greater than a received signal strength of the selected channel plus a fourth threshold signal strength, and monitoring for two sweep cycles communication channels of the currently used channel list having a received signal strength equal to or greater than the received signal strength of the selected channel plus a better base threshold signal strength.