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Method for performing call deflexion in IP multimedia subsystem centralized control service
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A multimedia subsystem and centralized control technology, applied in the field of communication, can solve problems such as inability to achieve
Inactive Publication Date: 2011-04-06
ZTE CORP
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[0018] It can be seen from the above processing that the call deflection service is implemented in the CS domain, but for the ICS service, it is obviously impossible to implement the call deflection service in the IMS domain
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example 1
[0067] In this example, the manner of releasing the bearer resource and session from the ICCF to the L-CAAF-n is that the ICCF initiates the release process after receiving the deflection service request. As shown in Figure 4, the specific processing process of this instance is as follows:
[0068] 401. The CSCF receives a called SIP session request message from the calling terminal A to the called terminal B from the calling side;
[0069] 402. The CSCF establishes a call to the called terminal B according to the number of the called terminal B, and the called terminal B rings;
[0070] 403. The called terminal B sends a release message with a deflection number to L-CAAF-n, releasing the bearer resource and session from the called terminal to L-CAAF-n;
[0071] 404, L-CAAF-n uses SIP to send a SIP302 response message carrying a call deflection request (indicating that the call is temporarily moved out) to the CSCF according to the deflection number and other information cont...
example 2
[0084] In this example, the way to release the bearer resource and session from ICCF to L-CAAF-n is that after L-CAAF-n sends the deflection service information to ICCF, after a delay, L-CAAF-n releases ICCF to L-CAAF -n The bearer resource and session.
[0085] As shown in Figure 5, the specific processing process in this example is as follows:
[0086] Step 501, the CSCF receives the called SIP session request message from the calling terminal A to the called terminal B from the calling side;
[0087] Step 502, the CSCF establishes a call to the called terminal B according to the number of the called terminal B, and the called terminal B rings;
[0088] In step 503, the called terminal B sends a release message to L-CAAF-n with a deflection number, and releases the bearer resource and session from the called terminal B to L-CAAF-n.
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Abstract
The invention discloses a method of conducting calling deflexion in an IP multimedia subsystem centralized control business center, which comprises a step S102, a called terminal sends delivering messages with deflexion information to a local circuit domain access adaptation function, wherein, the deflexion information carries deflexion numbers; a step S104, according to the delivering messages, the local circuit domain access adaptation function sends a deflexion request to an IP multimedia subsystem circuit domain control function by a conversation control path under a conversation initialization protocol mode, wherein, the deflexion request carries deflexion numbers; a step S106, the IP multimedia subsystem circuit domain control function receives the deflexion request and transmits the deflexion request to a telecommunication applicationserver through a calling conversation control function; and a step S108, the telecommunication applicationserver receives the deflexion request transmitted by the IP multimedia subsystem circuit domain control function, and then carries a calling deflexion according to the deflexion request. By using the invention, non-ICS users can realize calling deflexion businesses in an IMS domain.
Description
technical field [0001] The present invention relates to the communication field, and in particular, relates to a method for call deflection in IP multimedia subsystem centralized control service. Background technique [0002] IP (Internet Protocol, referred to as IP) multimedia subsystem (IP MultimediaCore Network Subsystem, referred to as IMS) is an IP-based network proposed by the 3rd Generation Partnership Project (3GPP) Architecture, which builds an open and flexible service environment, and can support multimedia applications, thereby providing users with rich multimedia services. [0003] IMS is an IP-based telecommunicationsnetwork architecture and has nothing to do with access technology. In addition to providing services for packet access networks such as General Packet Radio Service (GPRS) and WirelessLocal Area Network (WLAN), It can also provide services for mobile cellular networks such as Global System for Mobile Communications (GSM) and Unified Mobile Tele...
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