Apparatus and method for accomplishing handoff between...

Multiplex communications – Communication techniques for information carried in plural... – Adaptive

Reexamination Certificate

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C370S401000

Reexamination Certificate

active

07406097

ABSTRACT:
A method for accomplishing a handoff between mobile communication systems includes: a first mobile communication system having means for matching elements of a low generation mobile communication system; a second mobile communication system having means for matching elements of a high generation mobile communication system; a gateway connected with each of the mobile communication systems and having means for performing protocol conversion and address mapping. The method includes: adding, to each mobile communication system for which the handoff is performed, at least a message and a handoff process in a target system; transmitting, at the low mobile communication system for receiving a handoff request from a mobile station, a handoff request message to the gateway by performing the message process; transmitting, at the gateway, to the second mobile communication system by performing at least a different address mapping and a protocol conversion between the mobile communication systems in order to transmit and receive at least a signaling message and a traffic data between the mobile communication systems; and assigning, at the high mobile communication system, the message process and a relevant channel.

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