Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-04-03
2007-04-03
Urban, Edward F. (Department: 2618)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S439000
Reexamination Certificate
active
10736147
ABSTRACT:
A method of roaming between a mobile network and a wireless network can include receiving, over the wireless network, an invite from a user agent disposed within a mobile communications device. The mobile communications device can be engaged in a call over a voice channel in the mobile network. The method also can include selecting one of a plurality of gateways having an affinity with the user agent, wherein each gateway is configured as an interface between at least one mobile network and the wireless network. The call can be handed off from the mobile network so that at least a portion of the call is conducted over the wireless network using the selected gateway.
REFERENCES:
patent: 6374108 (2002-04-01), Jakobsen et al.
patent: 6493558 (2002-12-01), Bernhart et al.
patent: 6763236 (2004-07-01), Siren
patent: 6889045 (2005-05-01), Pan et al.
patent: 6931249 (2005-08-01), Fors et al.
patent: 6973313 (2005-12-01), Sebastian
patent: 6993335 (2006-01-01), Natarajan et al.
patent: 2002/0147008 (2002-10-01), Kallio
patent: 2003/0092444 (2003-05-01), Sengodan et al.
patent: 2003/0114158 (2003-06-01), Soderbacka et al.
patent: 2004/0087307 (2004-05-01), Ibe et al.
patent: 2004/0092265 (2004-05-01), Chitrapu et al.
patent: 2004/0203791 (2004-10-01), Pan et al.
patent: 2004/0248615 (2004-12-01), Purkayastha et al.
patent: WO 2001/06744 (2001-01-01), None
patent: WO 2002/07461 (2002-01-01), None
patent: WO 2003/077484 (2003-09-01), None
Creamer Thomas E.
Katz Neil A.
Moore Victor S.
International Business Machines - Corporation
Jackson Blane J.
Senterfitt Akerman
Urban Edward F.
LandOfFree
Mobile to 802.11 voice multi-network roaming utilizing SIP... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mobile to 802.11 voice multi-network roaming utilizing SIP..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mobile to 802.11 voice multi-network roaming utilizing SIP... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3736659