【作者】 罗启彬；

【导师】 邱昆；

【作者基本信息】 电子科技大学 ， 光学工程， 2001， 硕士

【摘要】 本论文针对基于波分复用技术的光传送网的关键技术，包括光传送网络的资源分配、光网络的生存性和光网络的节点结构及其性能进行了研究，然后提出了相应的解决方案，并综合应用数学建模、计算机仿真和PTDS应用仿真软件平台对所提出的方案进行了详细地分析、讨论，最后得出一些具有参考价值的结论。论文的主要工作及成果如下： 1、探讨了WDM光传送网的拓扑结构，对WDM光传送网的物理拓扑结构和逻辑拓扑结构进行了分析和比较，为后一阶段的工作打下基础。 2、对WDM光传送网络的资源分配进行了研究，并在给定网络的阻塞概率情况下，分析了如何才能充分利用光网络的有限光纤和波长资源以建立更多的连接请求的问题，然后提出了一种新的解决此问题的RWA方案，仿真结果显示这种方案要优于其他几种传统的RWA方案。 3、WDM光传送网的生存性是一个很重要的问题。本文独立地提出了一种解决WDM光传送网的生存性方案，并进行了计算机仿真，结果显示此方案不但能达到光网络的生存性要求，而且还节约了网络的光纤资源，降低了成本；最后利用PTDS应用仿真软件平台对一个二纤单向WDM光环形网的生存性进行了模拟，从而验证了WDM光环网的自愈保护策略的可行性问题。 4、利用PTDS应用仿真软件对WDM光传送网的节点结构和性能进行了分析，然后模拟了一种新的OXC结构——基于阵列光交换开关的OXC，这种OXC不但考虑了器件的集成度和成本问题，而且模拟结果还显示其具有灵活交叉连接的功能，为OXC的实用化提供了新的思路。更多还原

【Abstract】 In this paper, key technologies of Optical Transmission Networks(OTN) based on Wavelength Division Multiplexing(WDM), including the resource assignment of OTN the survivability of OTN the structure and performance of OTN’s node, are researched in detail.Then some solutions are presented accordingly. Through maths model,computer simulation and Photonic Transmission Design Suite(PTDS), the solutions are analyzed and discussed. some valuable results are reached.Main work of this paper as follows: 1 The topologies of OTN are discussed, then the physical topologies and the logical topologies are compared. 2 The resource assignment of OTN ,including routing resource and wavelength resource are investigated and analyzed.It is very important for Routing and Wavelength Assignment(RWA) in WDM Optical Transmission Networks. We are faced with how to make full use of limit resources to set up more communicational connections.A new RWA strategy is proposed for dynamic Routing and Wavelength Assignment problem in WDM Optical Transmission Networks. Simulation shows the RWA algorithms perform better than several traditional ones, which can make full use of networks? resources, reduce networks?blocking. 3 The survivability of OTN is very significant.We present a solution of OTN’s survivability.The results of computer simulation show this solution can not only satisfy all demands of OTN survivability,but also be very cost-effective.We also employ PTDS to simulate a two-fiber-unidirectional self-healing-ring.The fesibility of such strategy is validated. 4 By use of PTDS, the structure of OTN’s nodes,such as OXC,is simulated,and its performance is analyzed.At the end a new structure of OXC-based on arrayed optical cross-connection unit is simulated.The simulative results show it can reduce the OXC’s complexity and cost.Furthermore, this OXC’s function of cross-connection is fairly flexible.So some new thoughts for OXC’s practicability are offered.更多还原