SEAMLESS HANDOFF SYSTEM AND METHOD

摘要

A multicellular communications system where transmission between a roving subscriber and multiple base station transceivers is maintained throughout the territory. Each mobile subscriber unit has global code seeds for the entire communications system or an updated neighbor list and continuously searches to access available cell base stations while maintaining a communication link with one base station. Candidate cell base stations are interrogated and communicated with. The candidate base station that requires less transmitting energy from the mobile subscriber unit is closely monitored. When the mobile subscriber unit can successfully communicate with less transmit power than currently required by the present base station, the mobile subscriber unit is handed off to the candidate base station transceiver.

主权项

1. A subscriber unit comprising:
a receiver and a processor configured to receive at least one synchronization code transmitted from a base station; a memory, associated with the processor, configured to store an association between the at least one synchronization code and at least one global pilot code sequence; the processor configured to derive time synchronization information from the received at least one synchronization code; the receiver and the processor further configured to receive a global pilot code sequence of the base station using the derived time synchronization information and to determine the global pilot code sequence using the stored association; and the receiver and the processor further configured to receive a broadcast channel utilizing the determined global pilot code sequence.