Research And Implementation Of MPLS-TP Protection Mechanism Based-on Multi-service Packet Transport Platform

With the new generation of network technology gradually become clear,the trend of the new network technology is based on IP,packet switching as the core,with multi service unified transmission as a feature.Therefore,the urgent need for the old technology to carry out the integration and the gradual evolution of the old technology.And the traditional load network(SDH,MSTP)is the core of circuit switching,which carries the packet service efficiency,the bandwidth is exclusive,and the scheduling flexibility is not enough.At present,the service has been transferred from the original voice service(TDM)to the data service(IP),and the traditional transport network technology can not adapt to this change,so it is a kind of packet transmission technology which can effectively deliver the packet service and provide the telecommunication service,operation,maintenance and management(OAM).Transmission equipment from the "multi service interface adaptability" to the "multi service core adaptation",that is,the business of the packet transmission network requirements of the exchange of IP.But at the same time,we must ensure the normal operation of the traditional voice service,which requires the transmission technology and the packet technology mutual integration.Under the trend of the integration of the technology and the business transformation,the packet transport network(PTN)came into being.MPLS-TP is one of the PTN implementation plans.As a subset of MPLS-TP,MPLS is the MPLS's simplification.In order to better provide service that deliver service of telecom level quality assurance,MPLS-TP designed to support oriented connection and point-to-point OAM model.Therefore,MPLS-TP abandoned many no connection characteristics of IP/MPLS,and accepted standard ITU-T transmission network technologies,such as the protection of switching and the OAM.On the basis of the related concepts and principles of MPLS-TP,this thesis presents a software module design and implementation scheme of MPLS-TP key technology.The mechanism of G.8113 OAM ITU-T and G.8132 ITU-T shared protection ring is studied.Design the G.8132 software module,including the important data structure and interface,as well as detailed flow chart.Descripted the software implementation process based on the G.8113 CC function to trigger ring network protection.And extended the APS protocol to achieve the ring topology learning function.Finally,the software module is tested by using the switch equipment.