A startup process of an access point (AP) includes a discovery phase and an announcement phase. During the discovery phase, the AP detects neighboring APs from its own extended service set (ESS), neighboring APs from different ESSs, and external sources of interference. During the announcement phase,...http://www.google.com/patents/US7558571?utm_source=gb-gplus-sharePatent US7558571 - Wireless communication method and apparatus for implementing access point startup and initial channel selection processes