VOICE CALL CONTINUITY FOR EMERGENCY CALLS
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United States of America Patent
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-
N/A
Issued Date -
Jun 28, 2007
app pub date -
Dec 21, 2006
filing date -
Dec 23, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An enhanced Voice Call Continuity (VCC) application server and a method are described herein that: (1) assists in establishing an emergency call between a VCC capable User Equipment (UE) (which is located within an IMS network) and a Public Safety Access Point (PSAP); (2) assists in transitioning the emergency call from an IMS domain to a CS domain so the emergency call can be continued when the UE roams from the IMS network to a Circuit Switched (CS) network; and (3) assists the PSAP to call back the UE if the emergency call is dropped while the US is located in the CS network.
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Family
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