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Method and system for accessing terminal call through IMS access point of visited place

A technology of visiting places and access points, which is applied in the field of IP multimedia subsystem access function access, and can solve the problem of occupying CS long-distance link resources, etc.

Inactive Publication Date: 2016-03-30
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The disadvantage of the existing technology is that even if the visited network of UE-1 has IMS network access capability, UE-1 will not use the IMS of the visited network of UE-1 when UE-1 is in the CS domain. Network access capability, thus occupying the long-distance link resources of the CS

Method used

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  • Method and system for accessing terminal call through IMS access point of visited place
  • Method and system for accessing terminal call through IMS access point of visited place
  • Method and system for accessing terminal call through IMS access point of visited place

Examples

Experimental program
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Embodiment 1

[0047] figure 2 It is a flow chart of Embodiment 1 of the method of accessing the terminal call through the visited IMS access point in the present invention, as shown in figure 2 As shown, the application scenario of this example is that the IMS user terminal UE-1 registers to the IMS domain through the VICP, but the MSC does not provide the IMS access function. The domain accepts the voice call of UE-2. In this example, the method for terminating the call through the visited IMS access point specifically includes the following steps:

[0048] Step 201, UE-1 performs IMS registration using the identity A through the PS domain of the visited network, and the registration process passes VICP;

[0049] Step 202, UE-2 calls UE-1, for example, sending a call message such as an INVITE message targeting the identity A of UE-1;

[0050] Step 203, the call message (such as the INVITE message) is routed to the home IMS network of UE-1, and routed to the SCCAS by the CSCF of the hom...

Embodiment 2

[0061] image 3 The flow chart of Embodiment 2 of the method for accessing the terminal call through the visited IMS access point of the present invention, as shown in image 3 As shown, the application scenario of this example is that the IMS user terminal UE-1 registers to the IMS domain through the VICP, the MSC provides the IMS access function, and the MSC may replace UE-1 for IMS registration (that is, UE-1 has two IMS registration ), the registration process of MSC may pass through VICP (whether it does not affect the implementation of the technical solution of the present invention), because the PS domain of the visited network does not provide voice capability, it can only accept the voice call of UE-2 in the CS domain, including the following steps:

[0062] Step 301, UE-1 performs IMS registration through the PS domain of the visited location using the identifier A, and the registration process passes VICP;

[0063] Step 302, MSC uses identity B to replace UE-1 to p...

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Abstract

Disclosed is a method for a final call accessing via a visited IMS access point, comprising: after receiving a call request to a called subscriber, an SCC AS determining that the called subscriber accesses in a CS domain, the SCC AS obtaining identification information of the CS domain of the called subscriber, and calling the called subscriber via a PS domain, wherein the call message carries the identification information of the CS domain of the called subscriber; the VICP calling the called subscriber via the CS domain according to the identification of the CS domain of the called subscriber carried in the call message. Further disclosed is a system for a final call accessing via a visited IMS access point and implementing the foregoing method. The present invention reduces the occupation to CS long distance link resources to a certain extent.

Description

technical field [0001] The present invention relates to the technology that the visited network does not support the access function of the called user's IP Multimedia Subsystem (IMS, IPMultimediaCoreNetworkSubsystem), in particular to a method and system for accessing the terminal call through the visited IMS access point. Background technique [0002] IMS is an IP-based network architecture proposed by the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project), which builds an open and flexible service environment, supports multimedia applications, and can provide users with rich multimedia services. [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 the call sess...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L1/16H04W76/16
CPCH04W76/16
Inventor 谢振华
Owner ZTE CORP