Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-01-27
2009-08-11
Nguyen, David Q (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S445000, C455S560000, C455S412200
Reexamination Certificate
active
07574207
ABSTRACT:
Seamless wireless mobility is described. In one embodiment, a mobility manager can query a subscriber catalog for a current registration status of a handset. The mobility manager can then use the registration status to send a first signal to the handset over either a wireless network or an Internet protocol-based network.
REFERENCES:
patent: 6233465 (2001-05-01), Smith et al.
patent: 6957077 (2005-10-01), Dehlin
patent: 2002/0178163 (2002-11-01), Mayer
patent: 2005/0120198 (2005-06-01), Bajko et al.
patent: 2006/0079236 (2006-04-01), Del Pino et al.
Hicks, III John Alson
O'Neil Douglas
AT&T Intellectual Property I L.P.
Nguyen David Q
Parks Knowlton LLC
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