System and method for terminating communication sessions with roaming mobile devices
First Claim
1. A method, implemented by an application service, for registering a mobile device that uses an internet protocol multimedia subsystem (IMS) in a visiting cellular network, the method comprising:
- receiving a request to register an IMS session for a mobile device via a Serving Call Session Control Function (S-CSCF);
acknowledging receipt of the registration request by sending an acknowledgment message to the S-CSCF;
sending an identification message to a home database of the visiting cellular network,wherein the identification message includes an address of the application service that is associated with the IMS session of the mobile device and an identifier associated with the mobile device, andinitiating registration of the mobile device with the home database of the visiting cellular network.
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Accused Products
Abstract
A system and method to assist in establishing a communication session to a mobile device having a registered IMS session in a visited network, or having both a registered IMS session and a circuit-switched session in a visited network. When a mobile device establishes an IMS session with an application service in a visited network, the address of the application service and the identity of the mobile device is transmitted to the Home Location Register (HLR) and/or Home Subscriber Server (HSS) associated with the mobile device. The HLR or HSS stores the address of the application service in conjunction with the identity of the mobile device. When requests to establish a communication session with the mobile device are made, the HLR or HSS provides the address of the application service that is associated with the mobile device in the visited network to allow a communication session to be established.
17 Citations
20 Claims
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1. A method, implemented by an application service, for registering a mobile device that uses an internet protocol multimedia subsystem (IMS) in a visiting cellular network, the method comprising:
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receiving a request to register an IMS session for a mobile device via a Serving Call Session Control Function (S-CSCF); acknowledging receipt of the registration request by sending an acknowledgment message to the S-CSCF; sending an identification message to a home database of the visiting cellular network, wherein the identification message includes an address of the application service that is associated with the IMS session of the mobile device and an identifier associated with the mobile device, and initiating registration of the mobile device with the home database of the visiting cellular network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A computer readable medium, excluding transitory propagating signals, encoded with instructions that when executed by a processor, perform the operations of:
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receiving a request to register an IMS session for a mobile device via a Serving Call Session Control Function (S-CSCF), wherein the mobile devices uses an internet protocol multimedia subsystem (IMS) in a visiting cellular network; acknowledging receipt of the registration request by sending an acknowledgment message to the S-CSCF; and sending an identification message to a home database of the visiting cellular network, wherein the identification message including an address of the application service that is associated with the IMS session of the mobile device and an identifier associated with the mobile device, and receiving a message indicating that the mobile device has been registered with the home database of the visiting cellular network. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A system for registering a mobile device via an internet protocol multimedia subsystem (IMS) in a visiting cellular network, the system comprising:
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a network interface; one or more server computers coupled to the network interface, each server computer configured to; host, in a memory, applications for applications services, and execute, on one or more processors, registration protocol associated with the application services, wherein the protocol includes the operations of; receiving, at a server computer, a request to register an IMS session for the mobile device via a Serving Call Session Control Function (S-CSCF) server in the IMS layer; receiving, at the server computer, an acknowledging receipt of the registration request via an acknowledgment message for the S-CSCF; and forwarding an identification message to a home database of the visiting cellular network, wherein the identification message includes an address of the application service that is associated with the IMS session of the mobile device and an identifier associated with the mobile device, and registering the mobile device with the home database of the visiting cellular network. - View Dependent Claims (17, 18, 19, 20)
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Specification