Research And Application Of The Ip Bearer Network Qos Guarantee Mechanism

QoS is used as a synthetic index to measure the satisfied extent of applying some service.With the development of Network and explosive increase of data flow, It brings up a challenging task to handle the problems that how to deal with QoS from Peer to Peer.With present IP Routing Technology and Network structure, it is not easy to expand the whole network and to provide various services.Not undertaking QoS requirement has become the obstacle of the IP Network's development.How to resolve the problem and provide the satisfied service according to the special proceeding flexibly needs instant answers.Several major mechanisms which could realize QoS guarantee,including chalaeteristics and applications of Intserv model,Diffserv model,QoS rouling. MPLS and kinds of related techniques,have their advantages and disadvantages separetly.And only a single kind of QoS mechism can not solve problems of quality of service.MPLS iniegrate the peculiarity of ATM and IP.The technology has good flexibility and high speed.Adopting it can include various central network technologies.So the combination of Diffserv,Intserv and MPLS mechanism makes use of the explicit route ability of MPLS and the scalability of Diffserv.It has been believed universally to be the effective technology to resolve the IP QoS problems of backbone networks at Present.The paper introduces key technology of IP QoS first,analyzes the basic theory and work style of Intserv,Diffserv and QoS routing。Then it Based on the analysis of the principle of MPLS technology,it studies the feasibility of the integration of the QoS and the traffic engineering under the framework of the MPLS technology.And a detailed analysisis given for the requirement of the MPLS to support the Differv model.And expound the solution of end—to—end IP QoS using MPLS DS—TE.Finally,it expound three mixed solutions.The last part of this paper point out some deficiency in this project...