Patent ID: 6161013
Filing Date: 2000-12-12
Classification: G10L,H04B,H04L,H04W

Abstract:
A cellular communication system comprising:a telephone network;a first base station controller connected to said telephone network;a first base station connected to said first base station controller;a second base station connected to said first base station controller;a second base station controller connected to said telephone network; anda third base station connected to said second base station controller;wherein a user station in communication with said first base station is capable of handing off either to a second base station by use of said first base station controller without the assistance of said telephone network or a mobile switching center, or to said third base station by use of said first base station controller and said second base station controller with the assistance of said telephone network; andwherein hand-off of communication from said first base station to said third base station is initiated when said third base station sends a local-language handoff request message to said second base station controller, said second base station controller forwarding said local-language handoff request message to said first base station controller over a direct link, said first base station controller translating said local-language handoff request message into a network compatible handoff request message and transmitting said network compatible handoff request message to said telephone network, and, upon receipt of a circuit switch acknowledgment message from said telephone network, transmitting a network compatible circuit-switch-complete message over said telephone network to said third base station.