Method for interworking between circuit switching network and IP multimedia subsystem

Abstract

The invention relates to a method for intercommunicating a circuit switching network and an IP multimedia subsystem, which includes the following steps: for a call sent to an IMS network by the circuit switching network, MGCF extracts domain name information of the IMS network included in a called number and searches for system configuration information according to the domain name information; the MGCF also applies for corresponding resource to a media gateway, sends a request on establishing the call to the CSCF and sends a response on establishing the call to the circuit switching network; for the call sent to the circuit switching network by the IMS network, the MGCF extracts the domain name information of the IMS network included in the called number and searches for the system configuration information according to the domain name information; if no corresponding system configuration information exists or the system configuration information is not consistent with an IP address or a port corresponding to the call request, wrong information returns; the MGCF also applies for the corresponding resource to the media gateway, sends the request on establishing the call to the circuit switching network and sends the response on establishing the call to the IMS network.

Description

technical field [0001] The invention relates to the field of IP (Internet Protocol, Internet Protocol) multimedia, in particular to an intercommunication method between a circuit switching network and an IP multimedia subsystem. Background technique [0002] With the development of telecommunication technology and services, the competition in the telecommunication market is becoming more and more fierce. At present, in order to compete for the market, mobile operators and fixed operators in the telecommunications field are actively developing many new services to attract and retain customers and obtain more income. At the same time, more and more users also hope to obtain all-round and one-stop services. Therefore, the convergence (FMC) of the fixed communication network and the mobile communication network has become one of the future development trends of the communication industry. The network convergence solution based on the IP Multi-media Subsystem (IMS, IP Multi-med...

AI Technical Summary

Problems solved by technology

[0009] 1. Waste of resources: due to different stages of network development, the number of users is different, and the requirements for gateways are also different

Usually in the early stage of IMS commercial use, the number of users is not large, and the cost of using one MGCF for each IMS network to communicate with the local voice switching network i

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