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Method and system for mobile switching center to obtain ims control point information
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A mobile switching center and control point technology, applied in the field of IMS, can solve problems such as limited application scenarios
Active Publication Date: 2018-05-29
上海昭晟机电(江苏)有限公司
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[0035] It can be seen from the above process that in the prior art, the MSC must support IMS signaling and complete the registration process instead of the UE to obtain ICP information; if the MSC does not support IMS signaling, in order to be able to apply figure 1 In the process shown, new interfaces and protocols need to be added to enable MSC to interact with S-CSCF messages, so the application scenarios of the above process are very limited
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Embodiment 1
[0061] figure 2 It is a flow chart of the MSC obtaining ICP information in Embodiment 1 of the present invention, and describes the process of anchoring the CS call in the IMS domain by the MSC after the UE initiates a call in the CS domain. The process includes:
[0062] Step 201: the UE initiates a registration request to the IMS network through the PS domain, such as sending a Register message.
[0063] Step 202: The registration request passes through the P-CSCF, and the P-CSCF forwards the registration request to the ICP.
[0064] Step 203: The ICP forwards another registration request to the S-CSCF. The other registration request carries ICP information. The ICP information can be information that directly locates the ICP, such as the number, address or identifier of the ICP, or indirectly locates the ICP. The information of the ICP, such as the index of the ICP, may also be any combination of the above information.
[0065] Step 204: The S-CSCF allows the UE to acces...
Embodiment 2
[0098] image 3 It is a flow chart of the MSC obtaining ICP information in Embodiment 2 of the present invention, and describes the process in which the session of the UE in the CS domain is transferred to the PS domain, during which the MSC notifies the ICP to start the transfer, and the process includes:
[0099] Steps 301-308: with figure 2 Steps 201-208 are the same and will not be repeated here.
[0100] Step 309: The AS sends an update message carrying the ICP information to the HSS (Home Subscriber Server, Home Subscriber Server), for example, sending a Sh-push (Sh-push) message carrying the ICP information.
[0101] If the ICP is on the AS, the ICP information is generated by the AS; otherwise, the ICP information is forwarded to the AS by the S-CSCF.
[0102] Step 310: The HSS sends a notification message carrying ICP information to the SGSN, for example, sending an Insert Subscriber Data message carrying ICP information.
[0103] Steps 309-310 can also be perform...
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Abstract
Disclosed are an IMS control node information acquiring method and system for a mobile switching center. The method comprises: an application server providing IMS control node information to a serving GPRS support node; the serving GPRS support node receiving a query from the mobile switching center, then transmitting the IMS control node information to the mobile switching center. Employment of the present invention obviates the need for the addition of new interface and protocol for the mobile switching center to acquire the IMS control node information.
Description
technical field [0001] The present invention relates to IMS (IP Multimedia Subsystem, IP Multimedia Subsystem), in particular to a method and system for MSC (Mobile Switching Center) to acquire ICP (IMS Control Point) information. Background technique [0002] IMS is an IP-based network architecture proposed by 3GPP (3rd Generation Partnership Project), which builds an open and flexible service environment, supports multimedia applications, and can provide users with rich multimedia business. [0003] In the IMS service system, the control layer and the service layer are separated, and the control layer does not provide specific services, but only provides necessary functions such as triggering, routing, and charging to the service layer. [0004] The service triggering and control functions in the control layer are completed by CSCF (Call Session Control Function, call session control function). CSCF is divided into three types: P-CSCF (Proxy-Call Session Control Function...
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