First of all

this article introduces the development direction of the No.7 signalling network

analyzes the signalling in the 3G network and further fetches out the definition of the IP signalling network. Secondly

it states the protocol of IP signalling network and the structure of the target network. Integrating the current status of the signalling network of the China mobile

it raises the primary project of IP signalling network. Last

it compares and explains the current No.7 signalling network and IP signalling network in a simple way.