System and method for supporting voice call continuity for VOIP emergency calls
First Claim
Patent Images
1. An apparatus for supporting Voice Call Continuity (VCC) for emergency calls in a wireless access environment, comprising:
- a receiver for receiving a request for an emergency call via a radio link from a User Equipment (UE) at a node in a visited network, wherein the emergency call is destined for a Public Safety Answering Point (PSAP);
a component of the visited network for establishing the emergency call by having support for location anchored in the visited networka VCC application in the visited network for routing the emergency call and for moving the emergency call from one to the other of a circuit switched domain and a packet switched domain,wherein the visited network provides continuing support for location.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method are disclosed to support Voice Call Continuity (VCC) for emergency calls. The system includes a VCC Application in a visited internet-protocol multimedia subsystem (IMS) to facilitate domain transfers between the IMS subsystem and a circuit-switched (CS) subsystem. The system further includes an emergency call session control function (E-CSCF) subsystem in the visited IMS subsystem that is operatively coupled to the VCC Application to facilitate domain transfers between the IMS subsystem and the CS subsystem.
31 Citations
47 Claims
-
1. An apparatus for supporting Voice Call Continuity (VCC) for emergency calls in a wireless access environment, comprising:
-
a receiver for receiving a request for an emergency call via a radio link from a User Equipment (UE) at a node in a visited network, wherein the emergency call is destined for a Public Safety Answering Point (PSAP); a component of the visited network for establishing the emergency call by having support for location anchored in the visited network a VCC application in the visited network for routing the emergency call and for moving the emergency call from one to the other of a circuit switched domain and a packet switched domain, wherein the visited network provides continuing support for location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A method for supporting Voice Call Continuity (VCC) for emergency calls in a wireless access environment, comprising:
-
receiving a request for an emergency call via a radio link at a node in a visited network, wherein the emergency call is destined for a Public Safety Answering Point (PSAP); establishing the emergency call by having support for location anchored in the visited network, wherein the emergency call is routed via a VCC application in the visited network; and moving the emergency call from one to the other of a circuit switched domain and a packet switched domain by sending a request for handover to the VCC application, wherein the visited network provides continuing support for location. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
-
-
41. A computer program product for supporting Voice Call Continuity (VCC) for emergency calls in a wireless access environment, comprising:
-
a non-transitory computer-readable storage medium, comprising; a first set of instructions for causing a computer to receive a request for an emergency call via a radio link from a User Equipment (UE) at a node in a visited network, wherein the emergency call is destined for a Public Safety Answering Point (PSAP); a second set of instructions for causing the computer to establish the emergency call by having support for location anchored in the visited network, wherein the emergency call is routed via a VCC application in the visited network; and a third set of instructions for causing a computer to move the emergency call from one to the other of a circuit switched domain and a packet switched domain by sending a request for handover to the VCC application, wherein the visited network provides continuing support for location. - View Dependent Claims (42, 43, 44, 45)
-
-
46. At least one processor for supporting Voice Call Continuity (VCC) for emergency calls in a wireless access environment, comprising:
-
a first module for receiving a request for an emergency call via a radio link from a User Equipment (UE) at a node in a visited network, wherein the emergency call is destined for a Public Safety Answering Point (PSAP); a second module for establishing the emergency call by having support for location anchored in the visited network, wherein the emergency call is routed via a VCC application in the visited network; and a third module for moving the emergency call from one to the other of a circuit switched domain and a packet switched domain by sending a request for handover to the VCC application, wherein the visited network provides continuing support for location.
-
-
47. An apparatus for supporting Voice Call Continuity (VCC) for emergency calls in a wireless access environment, comprising:
-
means for receiving a request for an emergency call via a radio link from a User Equipment (UE) at a node in a visited network, wherein the emergency call is destined for a Public Safety Answering Point (PSAP); means for establishing the emergency call by having support for location anchored in the visited network, wherein the emergency call is routed via a VCC application in the visited network; and means for moving the emergency call from one to the other of a circuit switched domain and a packet switched domain by sending a request for handover to the VCC application, wherein the visited network provides continuing support for location.
-
Specification