A method of determining a communications channel including detecting whether a host is in a system; if a host is detected, querying the host for a channel on which to communicate and switching a channel selection logic based on a result from the query; and if a host is not detected, determining a channel...http://www.google.com.hk/patents/US20020063621?utm_source=gb-gplus-share專利 US20020063621 - Method and apparatus for device communications
