The Research For Multi-Path-route Based QoS Of DiffServ/MPLS

The commercial applications of Internet make transmit business which itselfconfronts unprecedented abundance and developing, which present a new challengefor Internet. With the developing of the high speed network switch technology andWDM high capacity bandwidth technology, the research of supporting themulti-media information transmission become one of the important research inInternet development. The multi-media not only demand the interconnectivity but alsohave strict consideration of bandwidth, delay and jitter. How to realize economicaland efficient QoS guarantee, which based on internet only for data transmission,become one of the important subject investigated by the service provider.The Qos module presented in the DiffServ hopefully realize the QoS serviceeconomically in Internet. The simple realization and convenient expansibility of theQoS module provide itself wide perspective in the Internet application. However,since the QoS module do not advocate the resource reservation on link and nod innetworks and the data transmission occupy resource according to the different priority,the data transmission have a special sensitivity for the network congestion and thelink and node of the high load may aggravate the transmission performance of the lowpriority data, which result in the inter-class effect. the recent research indicate that tocompletely realize the QoS module of DiffServ, Traffic engineering technology is oneof the important research field. MPLS is the high speed switch technology whichdeveloped in the 90s. MPLS realize the separation of routing and forwarding logically.The use of label forwarding is helpful to realize the traffic engineering moreefficiently in the network. This paper studies the realization of the traffic engineeringin MPLS network from multi-path route. And reduce the affection which the highpriority data make to the low priority data on its performance, which realize the QoSguaranty in Diffserv.Firstly the research reality of QoS route is presented, which include the keytechnology of DiffServ model to realize QoS, the realization of MPLS and TE andGMPLS used in optical network. On the base of deep research of QoS routingtechnology at present, this paper analyze the reality of the Qos gauranted by themulti-path routing and sigle-path routing and briefly study the performance ineliminating the inter-class effect using of Multi-Class-Multi-Path routing(MCMPR)and present a MCMPR algorithm. The paper use simulating and testing to validate theefficiency of eliminating the inter-class effect of the high load link in DiffServ. In theend of this article, the development of this algorithm is prospected.