【作者】 张程；

【导师】 鲍振武；

【作者基本信息】 天津大学 ， 通信与信息系统， 2004， 硕士

【摘要】 随着现代社会对通信依赖性的增强，光网络的生存性问题越来越突出。光层保护恢复具有保护速度快、可靠性高、成本低、透明性强等优点，因而成为研究的热点问题。然而由于光传送网处理的是光信号，以具有模拟特征的波长为单位，使得光通信网的光层生存性技术与比较成熟的SDH生存性技术相比，有了许多新的特点，有许多问题期待解决。本文的研究重点是光层自愈方案与关键技术问题。本文首先分析了当前光传送网生存性研究的现状，然后对光网络生存性的概念、光传送网的分层结构、电层网络生存性技术进行了描述，主要探讨了光层网络生存性技术、特点，提出了一种光层保护RWA（路由波长分配）ILP(整数线性规划)算法和两种RWA启发式算法，对它们的内容和性能做了详细描述，还详细讨论了光层生存性关键技术。本文还针对网络最常出现的故障――光纤断裂，设计完成了一个光层复用段保护系统，给出了详细的硬、软件解决方案、通信协议，指明了生存性各关键技术在本系统的实现，最后还给出了测试结果，并对测试结果给出了分析总结。该系统已通过天津市科委组织的技术鉴定，并荣获市科技进步二等奖。更多还原

【Abstract】 With the increase of modern society’s dependence on communication, survivability of optical network has become a crucial problem. Optical layer self-healing features in its fast protection rate, high reliability, low cost and transparent. However, survivable technique in optical layer of all-optical networks is different from those of SDH because of the different object handled by the two layers. A lot of problem of survivability in optical layer need to be solved. The cost-effective survivable scheme on optical layer and key techniques are the topics in this thesis. First of all, an analysis of present research situation is given in this thesis. Secondly, the concept of optical communication network survivability ，the layer structure of this network and survivability on circuit layer are discribed. Survivability on optical layer and its characters, some key techniques are discussed with a lot of emphasis，in which a kind of RWA ILP and two kinds of heuristic methods are presented with their contents and performances. Then an OMS protection scheme on optical layer is designed and realized in chapter 3. Aimed to deal with the most common communication failure，fiber rupture，a protection scheme is given, describing the technical scheme, realization of key technologies of optical layer protection, hardware, software, communication protocols and experimental result. The result shows the system is safe and efficient to the protection of the transport network.更多还原