What is soft switching

Definition of soft switching

With the development of computer and communication technology, the image has been recognized by more and more operators and equipment manufacturers by carrying voice and data in a public packet network. Under the trend of business driving and network integration, NGN Next Generation network model is born, and the distributed network structure is adopted in packet network to effectively carry voice, data and multimedia services.

As the core technology of NGN Network, the development of SoftSwitch has been paid more and more attention, as the control function module of next Generation network, SoftSwitch provides call control and connection control function for next Generation network (NGN) with real-time requirement. Telecommunication Transmission Research Institute of China Ministry of Information industry the definition of SoftSwitch is: "SoftSwitch is the network evolution and the next generation of packet network, one of the core equipment, it is independent of the transmission network, mainly to complete the call control, resource allocation, protocol processing, routing, authentication, billing and other major functions, At the same time can provide users with the existing circuit switches can provide all the business, and to provide a third party with programmable capabilities. "(Computer science)

At present, China has completed and promulgated the "soft switching equipment overall technical requirements" (ydc003-2001), clearly regulate the location of SoftSwitch in the network, functional requirements, business requirements, operation and maintenance and network management requirements, protocol and interface requirements, billing requirements and performance indicators, and the provision of IP telephony and intelligent network interoperability requirements. In particular, it is worth mentioning, not only the fixed network, mobile softswitch equipment technical requirements and equipment specifications of the draft also recently completed, mainly for SoftSwitch technology in mobile network mobility management and authentication features such as the corresponding expansion. It is not difficult to see that, in the increasingly common situation of packet switching, SoftSwitch technology, whether in fixed network or mobile network development and integration, as the core technology of the network, plays an important role in bonding.