Telecommunications – Radiotelephone system – Out-of-range indication
Reexamination Certificate
2008-03-25
2008-03-25
Gelin, Jean (Department: 2617)
Telecommunications
Radiotelephone system
Out-of-range indication
C370S352000, C455S456200, C455S435100
Reexamination Certificate
active
10991386
ABSTRACT:
A method and system that employs a proxy server associated with a mobile device in a wireless network, wherein the proxy server monitors whether the mobile device is still in coverage. The media service operates on top of a connectionless peer-to-peer packet-based transport protocol. If the proxy server detects that the device has lost coverage for more than a predetermined length of time, then it sends an out-of-coverage message to the other termination point engaged in the media service. The out-of-coverage message may instruct the termination point to release or cancel the service.
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Abdel-Kader Sherif
Kezys Vytautas Robertas
Doan Kiet
Gelin Jean
Research In Motion Limited
Ridout & Maybee LLP
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