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A system for selecting route in intercommunication between IMS network and CS network

A network and circuit-switched network technology, applied in the field of route optimization, the system field of route selection when the IMS network and the CS network communicate with each other, and can solve the problems of the IP network and the CS network intercommunication orders and detours, and no acquisition is involved.

Inactive Publication Date: 2008-06-04
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chinese patent application CN02146760 discusses how to select a route according to the called number of the user in the IP network, and does not involve the process of obtaining user location information from the home user server; In this case, the communication between the IP network and the CS network has the problem of signaling and voice path detours

Method used

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  • A system for selecting route in intercommunication between IMS network and CS network
  • A system for selecting route in intercommunication between IMS network and CS network
  • A system for selecting route in intercommunication between IMS network and CS network

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Experimental program
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specific Embodiment approach 1

[0055] Step 1: The BGCF receives a session request from the IMS network user to the CS network user.

[0056] Step 2: The BGCF sends a Mobile Application Part (MAP: Mobile Application Part) operation ATI to the HSS to inquire about the location of the called user according to the called number.

[0057] Step 3: The BGCF receives the response of the called user location query message from the HSS, which carries the MSC number or VLR number.

[0058] Step 4: BGCF decides whether to go out from the local area according to the called MSC number or VLR number (the judgment sign can be whether the called MSC or VLR is in the same local network as the BGCF). If the call is made locally and there are multiple MGCFs locally, select the appropriate MGCF, and the MGCF will complete the intercommunication with the CS network. If it is not a local outgoing call, according to the called location information, select a BGCF that is in the same local network as the called MSC number or VLR nu...

specific Embodiment approach 2

[0060] Step 1: The S-CSCF receives the session request initiated by the IMS network user to the CS network user. The S-CSCF triggers the session to the AS server.

[0061] Step 2: After completing the processing logic, the AS sends a mobile application part (MAP: Mobile Application Part) operation ATI to the HSS to inquire about the location of the called user according to the called number.

[0062]Step 3: The AS receives the response of the called user location query message from the HSS, which carries the MSC number or VLR number. The AS sends a session response to the S-CSCF; since the call is to the CS network, the S-CSCF sends a request to the BGCF, which carries the called MSC number or VLR number obtained by the AS from the HSS.

[0063] Step 4: BGCF decides whether to go out from the local area according to the called MSC number or VLR number (the judgment sign can be whether the called MSC or VLR is in the same local network as the BGCF). If the call is made locall...

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Abstract

The invention provides a system for selecting a route when an IP subsystem network of multimedia is communicated with a circuit switching network. An entity for controlling calling status is used after receiving a calling request which is initiated by a calling subscriber in the IP subsystem network of multimedia to a called subscriber in the circuit switching network. According to an identification code of the called subscriber, the entity for controlling calling status initiates a query on the called location in an assignment client server where the called subscriber is, then receives a query response message of the query on the called location, and selects an export network gateway according to the query on the called location in the query response message to complete the communication with the circuit switching network; and the assignment client server is used for generating the query response message including the called location message when receiving the query on the called location, and sending the query response message to the entity for controlling calling status. By the technical proposal, the invention realizes signaling optimization and avoids speech path detour to a certain extent.

Description

technical field [0001] The invention relates to the field of wireless communication and route optimization, in particular to a system for selecting routes when an IMS network and a CS network intercommunicate. Background technique [0002] With the development of mobile communication technology, a single voice communication method will not be able to meet the needs of users. What users need is a new multimedia communication method. This communication method can not only handle basic voice and video communications, but also support real-time communication. Messaging, collaboration, and streaming. 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) proposes an IP Multimedia Subsystem (IMS, IP Multimedia Subsystem) based on the packet domain. [0003] The main functional entities in IMS are call session control function entity (CSCF, Call Session Control Function), home subscriber server (HSS, HomeSubscriber Server) and CS (Circuit Switched, circuit s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/46H04L12/56H04W40/02
Inventor 孙闵汤凯张宝健
Owner ZTE CORP