Method and apparatus for providing a communication unit with a handoff between networks
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United States of America Patent
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Issued Date -
Dec 30, 2004
app pub date -
Jun 30, 2003
filing date -
Jun 30, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A communication unit (10) includes a mobility agent (225) for providing handoffs between a cellular network and a wireless local area network (11). The communication unit (10) determines if it should switch between the wireless local area network (11) and the cellular network for obtaining service, requests a handoff to the wireless local area network (11) or to the cellular network by sending a SIP message addressed to either a public number (229) or a private number (231) associated with the communication unit (10) upon making the determination. The communication unit (10) accepts a new call from an enterprise server (12) over the determined network. Corresponding methods of providing a hand-off is described.
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