Method for transmitting call command from electric switching network to IMS network

Abstract

The invention is concerned with transmitting signaling method from the circuit exchange network to the IMS network, and setting the route information for the media gateway controlling function (MGCF), the method includes: the MGCF receives the calling signaling that sends from the host call user equipment (UE) in the circuit exchange network, transforms the calling signaling into the speaking initiating protocol (SIP) information, sends the transforming SIP information to the called UE according to the route information that corresponds by MGCF. The method can achieve that the SIP information of the exchanged calling signaling can make the speaking correlative or the speaking irrespective SIP information route to the called UE by the MGCF directly passing the S-CSCF of the called UE service and not pass the demand of the I-CSCF when the signaling sends from the circuit exchange network to IMS network, in order to reduce the calling signaling exchange time from the circuit exchange network to the IMS network, reduces the operating burden of the IMS network.

Description

technical field [0001] The present invention relates to a technology for establishing call routing in an Internet Protocol Multimedia Subsystem (IMS) network, in particular to a method for transmitting call signaling from a circuit switching network to an IMS network. Background technique [0002] With the development of broadband network, mobile communication is not only limited to traditional voice communication, but also can combine various media services such as audio, video, picture and text. The combination of various media services with data services such as presence, short message, web page (WEB) browsing, positioning information, push service (PUSH), and file sharing can meet various needs of user equipment (UE). [0003] Driven by a variety of data service applications, standard organizations such as 3GPP and 3GPP2 have successively launched the IMS architecture. The purpose is to use a standardized open structure in the mobile network to implement a variety of mul...

AI Technical Summary

Problems solved by technology

[0011] Although the above method can be used to realize the route establishment from the circuit switching network to the IMS network, the above method still has a disadvantage: for each call signaling interaction in the call process from the circuit switching network to the IMS network, the above method must be used Establish routing, that is, adopt the function of converting the preset E.164 number to SIP-URI to convert the E.164 number carried in the call signaling to SIP-URI or query the mapping relationship in the HSS to obtain the information from the circuit switching network through the MGCF. After calling the SIP-URI corresponding to the tel-URI formed by the E.164 number carried in the signaling, the routing information of the called UE is determined according to the SIP-URI, and the I-CSCF serves the called UE through the I-CSCF according to the routing information of the called UE. The S-CSCF routes the call signaling to the called UE

In this way, the call signaling interaction time from the circuit switching network to the IMS network will be increased, and the service burden of the IMS network will be increased

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