The Research And Simulation Of Multi-Protocol Label Switching Traffic Engineering (MPLS-TE)-based Fault Recovery Mechanism

With the explosive growth of the internet scale and the emergence of a lot of new services,how to improve the QoS of the internet becomes the problem, which urgently need for solution. IP is a connectionless protocol and it can't ensure enough throughputs and appropriate transmission delay, and try its best to meet the requirement of users. MPLS (Multi-protocol Label Switching) opposed to be the backbone network technology of next generation internet. It takes good use of the switching technology of the core of network and the IP routing technology of the edge of network, and with the reasonable control of network traffic MPLS can help to optimizing the utilization of network resource and improving the performance of network.However, if there is no backup LSP when the primary LSP fails in MPLS network, MPLS frames cannot be forwarded to destination. Therefore, fault recovery has become an important research area in MPLS Traffic Engineering.The main contributions of this paper are as follows:1. Some study on MPLS is carried out. Architecture, operational mechanisms and fault recovery mechanisms based MPLS are discussed.2. All kinds of Fast reroute algorithms based MPLS traffic engineering are discussed. A novel MPLS fast rerouting algorithm is presented in detail. The algorithm is characterized by dividing the whole core network topology into several autonomous domains to make pre-constructed backup path in parallel, which can reduce the complexity to some extend.3. This paper designed and realized MPLS traffic engineering fault recovery simulation based on NS. It tested relational algorithms and analyzed the simulation result in the end.