Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2005-07-18
2010-10-05
Rampuria, Sharad (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S442000, C455S552100, C455S041200, C370S352000, C370S331000, C370S338000
Reexamination Certificate
active
07809381
ABSTRACT:
A telephone system supports communication with user devices over both a cellular radio network as well as over an Internet Protocol (IP) network, and enables roaming and active call handoff between cellular and IP domains. Approaches to detecting presence of a user near a suitable IP network are used in controlling transitions between the domains, for example, enabling automatic transitions between domains, and delivery of calls to a mobile user to data network devices in the vicinity of the user.
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Fors, Chad M. “Integrated WLAN-Cellular Voice Systems” I
Aborn Justin A.
Bogdanovic Ivan Dean
De Verteuil Andre
Freter Karl E.
Jhawar Sanjay S.
Bridgeport Networks, Inc.
Occhiuti Rohlicek & Tsao LLP
Rampuria Sharad
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