Method and apparatus for service control

Abstract

In the embodiments of the invention, a user equipment sends an I1 Invite message to a service centralization and continuity application server. The I1 Invite message includes a service control switching request indication and a Session Initiation Protocol (SIP) dialog identifier of an Internet Protocol multimedia subsystem (IMS) session. The service centralization and continuity application server searches for the IMS session according to the SIP dialog identifier, and sends a message indicating that a service control is switched to the user equipment.

What is claimed is: 
     
         1 . A method for service control via an I1 interface, the method comprising:
 receiving an I1 Invite message sent by a user equipment, wherein the I1 Invite message carries a service control switching request indication and a Session Initiation Protocol (SIP) dialog identifier of an Internet Protocol multimedia subsystem (IMS) session;   searching for the IMS session according to the SIP dialog identifier; and   sending a message indicating that a service control is switched to the user equipment.   
     
     
         2 . The method according to  claim 1 , wherein the service control switching request indication and the SIP dialog identifier are carried by a replace header field of the I1 Invite message. 
     
     
         3 . The method according to  claim 1 , wherein an I1 interface Call-ID of the I1 Invite message is a Call-ID of an SIP dialog corresponding to SIP dialog identifier. 
     
     
         4 . A service centralization and continuity application server, comprising:
 an I1 Invite message receiving unit configured to receive an I1 Invite message sent by a user equipment, wherein the I1 Invite message carries a service control switching request indication and a Session Initiation Protocol (SIP) dialog identifier of an Internet Protocol multimedia subsystem (IMS) session;   a session searching unit configured to search for the IMS session according to the SIP dialog identifier; and   a switching success message sending unit configured to send a message indicating that a service control is switched, the message being sent to the user equipment.   
     
     
         5 . The server according to  claim 4 , wherein the service control switching request indication and the SIP dialog identifier are carried by a replace header field of the I1 Invite message. 
     
     
         6 . The server according to  claim 4 , wherein an I1 interface Call-ID of the I1 Invite message is a Call-ID of an SIP dialog corresponding to SIP dialog identifier. 
     
     
         7 . A user equipment, comprising:
 an I1 Invite message sending unit configured to send an I1 Invite message to a service centralization and continuity application server, wherein the I1 Invite message carries a service control switching request indication and a Session Initiation Protocol (SIP) dialog identifier of an Internet Protocol multimedia subsystem (IMS) session; and   a switching success message receiving unit configured to receive a message indicating that service control is switched from the service centralization and continuity application server.   
     
     
         8 . The server according to  claim 7 , wherein the service control switching request indication and the SIP dialog identifier are carried by a replace header field of the I1 Invite message. 
     
     
         9 . The server according to  claim 7 , wherein an I1 interface Call-ID of the I1 Invite message is a Call-ID of an SIP dialog corresponding to SIP dialog identifier. 
     
     
         10 . A system, comprising:
 a user equipment; and   a service centralization and continuity application server;   wherein the user equipment is configured to send an I1 Invite message to the service centralization and continuity application server, the I1 Invite message including a service control switching request indication and a Session Initiation Protocol (SIP) dialog identifier of an Internet Protocol multimedia subsystem (IMS) session; and   wherein the service centralization and continuity application server is configured to search for the IMS session according to the SIP dialog identifier, and to send a message indicating that a service control is switched to the user equipment.   
     
     
         11 . The system according to  claim 10 , wherein the service control switching request indication and the SIP dialog identifier are carried by a replace header field of the I1 Invite message. 
     
     
         12 . The system according to  claim 10 , wherein an I1 interface Call-ID of the I1 Invite message is a Call-ID of an SIP dialog corresponding to SIP dialog identifier.