Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2011-08-09
2011-08-09
Sing, Simon (Department: 2614)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S354000, C370S356000, C379S088170, C455S403000, C455S428000
Reexamination Certificate
active
07995565
ABSTRACT:
In one embodiment, a scheme is disclosed for managing call continuity in a network environment including a circuit-switched (CS) network and an IP multimedia subsystem (IMS) network wherein a SIP Invite message having a Domain Transfer-URI contained in the Request-URI that is operable to trigger a return of a routable number is utilized. Responsive to the SIP Invite message from a UE device, a network node provides a SIP response message (e.g., SIP 380 (Alternative Service) Response) which includes one or more radio access technologies and an alternative domain available to the UE device for continuing a call from one domain to another domain.
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Allen Andrew
Buckley Adrian
Shenfield Michael
King Simon
Research In Motion Limited
Sing Simon
The Danamraj Law Group, P.C.
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