Inter-system handover

Details Inter-system handover Inter-system handover

2011-07-19

2011-07-19

D'Agosta, Stephen M (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S432100, C455S435200, C455S436000, C455S437000, C455S438000, C455S440000, C455S441000, C455S442000, C455S443000, C370S310200, C370S328000, C370S331000

Reexamination Certificate

active

07983676

ABSTRACT:
A method of handover in a wireless communication system in which an asynchronous system and a synchronous system are mixed is disclosed. The method comprises the steps of: the asynchronous system ordering a dual mode mobile terminal to perform a handover from the asynchronous system to the synchronous system; when the handover order is received at the mobile terminal, the mobile terminal transmitting a frame or a preamble through a reverse traffic channel to the synchronous system, reporting to the synchronous system that the handover is completed and initiating a timer of the mobile terminal which is set according to a predetermined time; the mobile terminal switching from an asynchronous vocoder into a synchronous vocoder when the timer expires; and the wireless communication system switching vocoders of asynchronous and synchronous MSCs when the report is received.

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