南京邮电大学 硕士学位论文 多业务IP网络流量控制和动态路由算法研究 姓名：张亮 申请学位级别：硕士 专业：通信与信息系统 指导教师：唐宝民 2011-03 ? ? I ? ? ? ? Internet ? ? e-mail? ?IP ? ? ? ? IP ? ? ? ? QoS ? ? IP ? QoS ? ? QoS ? ? IntServ?DiffServ ? MPLS ? ? QoS ? ? QoS ? ? ? ? ? ? E-LSP ? L-LSP ? ? ? E-LSP ? MPLS ? QoS ? CPRA?Criticality and Probability Routing Algorithm? ? MATLAB ? CPRA ? ? ? ? ? ? ? ABSTRACT II ABSTRACT In recent years, with the development of Internet, Internet has become multi-service bearer network from a single data transmission network. Those data transmission services which are mainly E-mail and files transmission can not meet the needs of users, and real-time applications which include VOD, VOIP, and distance learning are emerging quickly. The most important features of real-time applications are sensitive to delay and jitter. However, traditional IP network adopts best-effort packet forwarding manner, which affects the network performance indicators such as delay, jitter and packet loss rate lack. Therefore, how to provide users with differentiated end-to-end QoS guarantees becomes a hot topic in the industry. This paper first introduces those existing QoS models in IP network, analyses essential principles and main features, we can find that each model can not provide good QoS guarantees alone. In order to find a solution, we give an improved hybrid end-to-end QoS model and implementation method through combination of IntServ, DiffServ, and MPLS in practice, and complete the service mapping. This model not only reserves advantages of each model, but also provides reliable end-to-end QoS guarantees to users and has good scalability and robustness. Then we discuss traffic control model of edge network and analyze the service curve of real-time traffic based on network calculus, and give the maximum end-to-end delay expression. Through using improved service curve, we can reserve fair network resource for more users. By comparing E-LSP and L-LSP, we use extended E-LSP to solve the problem of expansibility and localization by modifying the definition of label switching. Finally, a new QoS dynamic routing algorithm named CPRA is proposed, we analyze several dynamic routing algorithms through MATLAB, and verify the efficiency of CPRA in load balancing. Keywords: Intserv Diffserv MPLS Traffic Control Dynamic routing algorithm ? ?不 ?不 ?不 ?不 ?不 不 不 不 ? ?不 ?不 ?不 ?不 ?不 不 不 不 ?负负负负负负负负负负负负负不?负负负负负负负负负负负负不 ?_ ?_ ?_ ? ?不 ? 1 ? ? ? 1.1 ? ? ? ? IP ? ? Internet ? ?Internet ? ?Multiple Protocol Label Switch?MPLS? ?(Traffic Engineering?TE)? ? ? QoS ? QoS ? ? ? ? ? IP ? ? ?NGN? ? ?(QoS)? ? ITU, 3GPP, 3GPP2, IETF ? QoS ? ? IETF ? IntServ/RSVP ?DiffServ ?MPLS ?IntServ ? RSVP ? ? RSVP ? ? QoS? RSVP ? ? ? IntServ ? ? ? IntServ ?DiffServ ? IntServ ? ? QoS ? QoS ? ?MPLS ? IP ? ATM ? ?QoS ?QoS ? VPN ?MPLS ? ? ?不 ? 2 MPLS ? DiffServ ? IP ? QoS ? ?1? MPLS ? LDP ? RSVP-TE ? RFC3702 ? ? ? ? QoS ? ?MPLS ? QoS ?