Method for handling CS calls in voice call continuity, VCC application server and translation entity
First Claim
1. A method comprising:
- receiving, by a Voice Call Continuity (VCC) application server, a voice call of a Circuit Switched (CS) domain that originated from a VCC user equipment (UE) using a called party number,wherein the VCC application server supports an Internet protocol Multimedia Subsystem (IMS) and handles VCC between the CS domain and an IMS domain for the VCC UE,wherein if the called party number is not an international number format and the VCC UE is in a home network, no translation of the called party number into the international number format is required and the received voice call is anchored in the IMS,wherein if the called party number is not the international number format and the VCC UE is not in the home network but is in a visited network, the translation of the called party number into the international number format is performed by the VCC application server based on translation rules and the received voice call is anchored in the IMS, andwherein if the called party number is a short number defined in the visited network which is different from a short number defined in the home network and is not the international number format and the VCC UE is not in the home network but is in the visited network, a conversion of the short number defined in the visited network into an actual number related to a service provided by the visited network is performed by the VCC application server, the translation of the actual number into the international number format is performed by the VCC application server based on translation rules and the received voice call is anchored in the IMS.
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Accused Products
Abstract
A method for handling CS (Circuit Switching) calls in a VCC (Voice Call Continuity), a VCC application server and an apparatus thereof, wherein first, the VCC application identifies whether a called party number of CS domain calls routed thereto is in an international format, secondly, the VCC application may request to convert the format of the called party number into the international format (referred to as ‘routable number’) if the called party number is not in the international format, thirdly, a translation entity may convert the called party number into the routable number by adding an international prefix suitable for a current location of the originating terminal based on both the called party number and location information on the originating terminal, and then the calls may continue in an IMS domain or a CS domain by the routable number.
21 Citations
18 Claims
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1. A method comprising:
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receiving, by a Voice Call Continuity (VCC) application server, a voice call of a Circuit Switched (CS) domain that originated from a VCC user equipment (UE) using a called party number, wherein the VCC application server supports an Internet protocol Multimedia Subsystem (IMS) and handles VCC between the CS domain and an IMS domain for the VCC UE, wherein if the called party number is not an international number format and the VCC UE is in a home network, no translation of the called party number into the international number format is required and the received voice call is anchored in the IMS, wherein if the called party number is not the international number format and the VCC UE is not in the home network but is in a visited network, the translation of the called party number into the international number format is performed by the VCC application server based on translation rules and the received voice call is anchored in the IMS, and wherein if the called party number is a short number defined in the visited network which is different from a short number defined in the home network and is not the international number format and the VCC UE is not in the home network but is in the visited network, a conversion of the short number defined in the visited network into an actual number related to a service provided by the visited network is performed by the VCC application server, the translation of the actual number into the international number format is performed by the VCC application server based on translation rules and the received voice call is anchored in the IMS. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising:
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a processor operatively connected to a Domain Transfer Function (DTF) entity, a Domain Selection Function (DSF) entity, a Circuit Switched Adaptation Function (CSAF) entity, a Circuit Switched Adaptation Function (CSAF) entity, and a Customized Application for Mobile network Enhanced Logic (CAMEL) service entity; the DTF entity configured to transfer, via the processor, a Voice Call Continuity (VCC) user equipment (UE) access; the DSF entity configured to provide, via the processor, a selection of a domain for delivering voice calls from the VCC UE; the CSAF entity configured to facilitate, via the processor, domain transfer procedures; and the CAMEL service entity configured to further facilitate, via the processor, the domain transfer procedures, wherein the DTF entity, the DSF entity, the CSAF entity, and the CAMEL service entity are part of a Voice Call Continuity (VCC) application server and cooperate to perform the steps of; receiving, by the VCC application server, a voice call of a Circuit Switched (CS) domain that originated from the VCC UE using a called party number, wherein the VCC application server supports an Internet protocol Multimedia Subsystem (IMS) and handles VCC between the CS domain and an IMS domain for the VCC UE, wherein if the called party number is not an international number format and the VCC UE is in a home network, no translation of the called party number into the international number format is required and the received voice call is anchored in the IMS, wherein if the called party number is not the international number format and the VCC UE is not in the home network but is in a visited network, the translation of the called party number into the international number format is selectively performed by the VCC application server based on translation rules and the received voice call is anchored in the IMS, and wherein if the called party number is a short number defined in the visited network which is different from a short number defined in the home network and is not the international number format and the VCC UE is not in the home network but is in the visited network, a conversion of the short number defined in the visited network into an actual number related to a service provided by the visited network is performed by the VCC application server, the translation of the actual number into the international number format is performed by the VCC application server based on translation rules and the received voice call is anchored in the IMS. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification