【作者】 党爱民；

【导师】 杜荔；

【作者基本信息】 东北大学 ， 通信与信息系统， 2006， 硕士

【摘要】 GMPLS由MPLS演进而来，它是MPLS向光层扩展的必然产物。GMPLS将时隙、波长和光纤端口作为标记用于数据转发，通过采用扩展的信令、路由协议和新增的链路管理机制以适应对智能光网络进行动态控制和传送信令的要求，能够动态提供网络资源并增强网络的生存性。 随着网络的进一步发展，用户对网络的服务质量也提出了更高的要求，尤其是对网络生存性的要求。若给每一个业务都提供端到端的路径保护无疑提高了生存可靠性，但却减低了资源利用率、增大了网络阻塞的可能性，因而不能使所有业务的QoS得到保证。且随着网络规模的不断扩大，网络上的业务流量日益增多，并具有很强的突发性和不可预测性。如何管理和协调各种业务的流量负载以避免拥塞是当前研究的一个热点问题，这也使得流量工程(Traffic Engineering)在Internet中的作用越来越重要。流量工程主要考虑对网络性能进行优化，其目标是有效而可靠地运行网络，同时优化网络资源的使用。因此有必要把路径保护和流量工程综合考虑来解决网络的生存性问题，本文正是对这一问题而展开研究的。 本文对基于GMPLS的流量工程和生存性机制作了分析，针对GMPLS的WDM网，提出了一种以跳数、带宽碎片要求为权重，合理分配带宽资源的新算法，并将这种算法用在共享保护通路中，给出了一种共享保护新算法；最后，根据不同用户、不同业务对生存性的不同要求，又提出了一种能够提供一定QoS保证的区分服务保护算法。该算法针对网络中的高可靠性业务、中等可靠性业务及可抢占式业务对可靠性的不同要求，为其选择不同的保护方案。对于高可靠性业务，使用一种共享保护方案，而对于可抢占式业务，可使用高可靠性业务连接的保护资源。经理论分析和实验仿真验证，本文提出的算法特别适合基于GMPLS的WDM网状网，能够在保护用户服务质量的同时减小网络的阻塞率，提高整网资源的利用率。而随着网络规模的扩大，越来越多的新业务有着严格的QoS、高带宽及生存性要求，因而该算法适应了这一现实的演进。更多还原

【Abstract】 GMPLS is developed from MPLS, which is a inevitable product of MPLS for expanding of the ray-direction stratum. GMPLS can be used as labels to transmit data of time slots, wavelength and optical fiber ports, it can demand the requirements of intelligent light network which adapts to dynamic controlling or transmitting signal by extended signal protocols, routing protocols and new link management protocols, so it can also provide dynamic resources and improve validity of the network.With the further developments of the network; people claim for higher Quality of Service (QoS), especially the survivability of the network. If the end to end path protection is offered to every service, incontrovertibly, the reliability of the network will be improved. But it is at the cost of decreasing the utilization rate of resources and increases possibility of the block of the network. As a result, it can not guarantee the quality of all services. With the rapid development of the network, the network traffic is growing increasingly, and they are paroxysmal and unpredictable. How to manage and control the burst and unexpected traffic load to avoid network congestion is a hops for current researchers. Now Traffic Engineering (TE), which mainly concerns the optimization of network performance, becomes more and more important in Internet researches. It aims to circulate the network efficient and reliable, and at the same time, it optimizes the resources of the network. So it is necessary to consider the integration of TE and path protection to solve the problem of reliability. Therefore, we set out our research work on the problem in this paper.Analyzed the scheme of TE and survivability based on GMPLS, and proposed a new algorithm, which took hops and demands for bandwidth fragment into account to distribute the bandwidth resource for the reaching traffic. Then the algorithm was used in setting up shared protection path, and a new shared path protection algorithm was proposed. At last, a new kind of differentiated service protecting algorithm was proposed, which chose different path protection schemes according to the high reliability service, middle reliability service or the preempt ones. It chose a shared path protection scheme to meet the requirements of the更多还原