Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-05-08
2007-05-08
Kincaid, Lester G. (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S437000, C455S439000, C455S440000, C370S331000
Reexamination Certificate
active
10736135
ABSTRACT:
A method of roaming between a cellular network and a wireless network can include receiving an invitation over the wireless network. The invitation can be sent from a mobile communications device engaged in a cellular call over a cellular voice channel. The method also can include authenticating the mobile communications device over the wireless network, sending an acknowledgement of the invitation to the mobile communications device over the wireless network, and initiating a handoff. The established cellular call can be switched from the cellular network to the wireless network.
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Creamer Thomas E.
Katz Neil A.
Moore Victor S.
Akerman & Senterfitt
Figueroa Marisol
International Business Machines - Corporation
Kincaid Lester G.
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