Method and System for Implementing Communications
First Claim
1. A method for implementing communications, comprising:
- A. an IP Multimedia Subsystem (IMS) Terminal Module (TM) in a Combining Circuit Switched bearer with IP multimedia subsystem (CSI) terminal indicating a Circuit Switched (CS) TM in the CSI terminal to initiate a CS bearer establishment;
B. the CS TM taking the IMS TM as a called party and sending a call establish request to a CS domain call control function;
C. the CS domain call control function routing the call establish request to a CS/IMS interworking gateway according to called party number information in the received request;
D. the CS/IMS interworking gateway converting the received call establish request into an IMS session establish request, and then sends the IMS session establish request to the IMS TM; and
E. the IMS TM performing a correlated control between two sessions, wherein one is between the IMS TM and the CS/IMS interworking gateway, and the other is between the IMS TM and a peer side, so as to implement a CSI service.
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Abstract
The present invention discloses a method and a system for implementing communication for a CSI terminal, the system includes: an IP Multimedia Subsystem Terminal Module (IMS TM), a Circuit Switched Terminal Module (CS TM), a CS/IMS interworking gateway. The method includes: the IMS IM indicates the CS TM to establish a CS/IMS interworking call connection from the CS TM to the IMS TM, and establish a CS bearer between the CS TM and CS/IMS interworking gateway, the IMS TM correlated controls the two sessions respectively with the CS/IMS interworking gateway and the peer side, so as to make the media components it exchanged with the peer side be exchanged between the peer side and the CS/IMS interworking gateway via IP bearer, and then be exchanged between the CS/IMS interworking gateway and the CSI terminal through the established CS bearer. Thus the present invention ensures the communication of the CSI terminal.
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Citations
39 Claims
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1. A method for implementing communications, comprising:
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A. an IP Multimedia Subsystem (IMS) Terminal Module (TM) in a Combining Circuit Switched bearer with IP multimedia subsystem (CSI) terminal indicating a Circuit Switched (CS) TM in the CSI terminal to initiate a CS bearer establishment;
B. the CS TM taking the IMS TM as a called party and sending a call establish request to a CS domain call control function;
C. the CS domain call control function routing the call establish request to a CS/IMS interworking gateway according to called party number information in the received request;
D. the CS/IMS interworking gateway converting the received call establish request into an IMS session establish request, and then sends the IMS session establish request to the IMS TM; and
E. the IMS TM performing a correlated control between two sessions, wherein one is between the IMS TM and the CS/IMS interworking gateway, and the other is between the IMS TM and a peer side, so as to implement a CSI service. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method for implementing communications, applicable to a case that, a Circuit Switched (CS) bearer established during a procedure of implementing a Combining Circuit Switched bearer with IP multimedia subsystem (CSI) service is abnormally released, comprising:
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a. releasing the CS bearer between a CS Terminal Module (TM) and a corresponding CS domain call control function, and the CS bearer between the CS domain call control function and a corresponding CS/IP Multimedia Subsystem (IMS) interworking gateway;
b. the CS/IMS interworking gateway releasing a corresponding IMS session with an IMS TM corresponding to the CS TM;
c. the IMS TM establishing a Packet Switched (PS) bearer by a re-negotiation procedure, and exchanging media components with a peer side using the established PS bearer, instead of the previous CS bearer. - View Dependent Claims (34, 35)
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36. A system for implementing communications, comprising:
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a Circuit Switched (CS) domain call control function, used for interacting and establishing a CS bearer with a CS Terminal Module (TM), and routing a call establish request to a CS/IP Multimedia Subsystem (IMS) interworking gateway;
the CS/IMS interworking gateway, used for converting a call establish request routed from the CS domain call control function, into an IMS session establish request, and sending the IMS session establish request to the IMS TM, which correlated with the CS TM initiating the request for the CS bearer establishment, through an IMS session control function, thus establishing a CS to IMS interworking call between the CS TM and the IMS TM;
moreover, the CS/IMS interworking gateway is used for sending the IP address and port information of the IP port resource it reserved for exchanging media components to the IMS TM, and transferring the media components it received from the IMS side to the CS TM, using the IP port, through the CS bearer established between the CS/IMS interworking gateway and the CS TM, and vice versa;
the IMS TM, used for implementing CS bearer control function, judging and indicating the CS TM to initiate the CS bearer establishment during an IMS service, completing the correlated control upon the two sessions it established respectively with the peer side and the CS/IMS interworking gateway in a Back-To-Back User Agent (B2BUA) mode after receiving the IMS session establish request which is sent from the CS/IMS interworking gateway, and therefore, making the media components, which is destined to the IMS TM, be transmitted by the peer side to the IP port the CS/IMS interworking gateway reserved for exchanging the media components with the IMS TM, and then be transmitted to the CSI terminal through the CS bearer established between the CS TM and the CS/IMS interworking gateway;
the CS TM, used for initiating a call establish request by taking the IMS TM as a called party after receiving an instruction from the IMS TM, and completing the establishment of the CS bearer by interacting with the CS/IMS interworking gateway. - View Dependent Claims (37, 38, 39)
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Specification