METHOD, SYSTEM AND NETWORK DEVICE FOR EVOLVING CIRCUIT SWITCHED DOMAIN CORE NETWORK

摘要

A method, system and network device for evolving a circuit switched (CS) domain core network are provided. The method comprises the following steps: an enhanced mobile switched center server (MSC-Server) is connected to an internet protocol (IP)multimedia subsystem (IMS) network to act as a telephony application server (TAS) in the IMS network and provide users in the IMS network with telephony services, wherein said enhanced MSC-Server is obtained by updating a MSC-Server in a CS network and has the function of a TAS in an IMS network; and for a service request for an original service originated by a CS user who has subscribed new services, the enhanced MSC-Server processes the service, and for a service request for a new service originated by a CS user who has subscribed new services, the enhanced MSC-Server sends said service request for the new service to an application server corresponding to the IMS network to process.