Design, Implementation And Evaluation Of IPS Signaling Front End Of Mobile Intelligent Network

With the support of No.7 signaling network and large-scale concentrated type database, MIN(Mobile Intelligent Network) separates network switching and controlling, and integrates the intelligence of units in the network into the new function module-SCP(Service Control Point) which is made up of medium and micro computers. Meanwhile, existing switches only operate fundamental switch function. In order to connect to SSP(Service Switching Point) and SS7(Signaling System No.7) signaling network, SCP also needs support from signaling front end. The signaling front end describes the hierarchy of signaling which is made up of transmission and controlling protocols.IPS (Integrated Programmable Switch) is an independent No.7 signaling front end processing platform. It provides not only the function of front end processing but also the function of switch control. Its internal communication with the background main processor is through the standard TCP/IP interface. It provides processing and services for protocols at various layers such as MTP(Message Transfer Part Layer), SCCP(Signaling Connection Control Part), TCAP(Transaction Capabilities Application Part), TUP(Telephone User Part) or ISUP(ISDN User Part) to implement the specific services. As the application of IPS used as CRBT(Color Ring Back Tone Service) signaling front end platform become more mature, IPS shows its high performance and low cost. It is very suitable for SCP signaling front end platform as it represents a telecom-class functionality and stability.The thesis focuses on the design and implementation of IPS used as SCP signaling front end platform, and evaluation of this solution according to testing result. Chapter 1 begins with the introduction of MIN architecture and principle, followed by an introduction of four MIN solutions :CAMEL(Customized Applications for Mobile Network Enhanced Logic) brought up by ESTI(European Telecommunications Standard Institute), WIN(Wireless Intelligent Network) brought up by ANSI(American National Standards Institute), NI(Network Intelligent) brought up by Ericsson and WINA(Wireless Intelligent Network Architecture) brought up by Motorola, then an introduction of three common MIN services: PPS(Pre-Paid Service), CRBT(Color Ring Back Tone Service) and VPMN(Virtual Private Mobile Network), then the concept of signaling front end platform, with an introduction of OpenCall and IPS at the end. Chapter 2 addresses the design and implementation of signaling front end platform and brings up the main infrastructure of this solution. The emphasis is the design and implementation of two protocol interfaces: N7server and I7server. The two interfaces both lay between IPS and back end in logical structure. Their main fuctions are message transmission, session maintenance, flow control and package analysis. The difference is the former processing TCAP protocol and the latter processing ISUP protocol. Chapter 3 brings up a High-Capacity SCP Solution: multi-module, multi host configuration to highly improve its processing capabilities, meeting the high requirements of telecom operators, followed by liability analysis which includes the dual structure and identity maintenance of main module. At last it proves the signaling processes under two circumstances: instance initiated by proximal end and distant end. Chapter 4 focuses on the test of the solution and evaluation of the solution according to the result data. In the last chapter, there is a summarization of progress and a list of the follow-up work.