A wireless communications network includes a first base station system that performs wireless communications according to a first protocol (e.g., 1xEV-DO protocol) and a second base station system that performs wireless communications according to a second, different protocol (e.g., IS-2000). A link...http://www.google.de/patents/US20020067707?utm_source=gb-gplus-sharePatent US20020067707 - Method and apparatus to control handoff between different wireless systems
