An unlicensed wireless service is adapted to generate the interface protocols of a licensed wireless service to provide transparent transition of communication sessions between a licensed wireless service and an unlicensed wireless service. In one embodiment, a mobile station includes level 1, level...http://www.google.com.tw/patents/US7127250?utm_source=gb-gplus-share專利 US7127250 - Apparatus and method for extending the coverage area of a licensed wireless communication system using an unlicensed wireless communication system
