The cost - effective survivable scheme in otn and key technology , primary path and protection path routing and wavelength assignment ( rwa ) are the topics in this thesis 本文的研究重点是有成本效益的光层保护方案与关键技术以及工作通道与保护通道的路由与波长分配问题。
At the end of the chapter , the effort to improve the fairness of wdm networks with xgm wavelength converters is performed ; the result shows that it is not effective 第四章研究了备用路由与波长分配算法对有限范围波长变换器wdm网络的性能影响，主要是研究fwm和xgm波长变换器。
Therefore all - optical networks based on the concept of wdm and wavelength routing rwa ( routing and wavelength asignment , rwa ) is considered as a candidate for the next generation transport network 因此利用wdm传输技术以及选路和波长分配rwa ( routingandwavelengthalgorithm , rwa )技术的光传送网是下一代高速骨干网最具竞争力的候选者。
The priority - based wavelength assignment method is employed to meet different operation requests . another rwa algorithm based on the layered - gragh model is used to resolve the two subproblems of routing and wavelength assignment simultaneously 文章还讨论了一种基于分层图模型的rwa算法，它使得光网络的路由和波长分配两个子问题同步解决。
In this paper , wavelength assignment in wdm optical networks with dynamic traffic is studied and a fair priority based dynamic threshold algorithm for wavelength assignment without wavelength conversion proposed 摘要文章研究了波分复用( wdm )光网络中动态业务下的波长分配问题，在无波长转换器的条件下，提出了一种加入了公平性考虑的动态门限算法。
Routing and wavelength assignment ( rwa ) become the hotspot of research for logically administration and efficiently utilization on the network resources after that optical exchange technology eases the exchanging pressure of the nodes 光交换技术的应用,缓解了节点处的压力,可是网络资源有限,为了合理管理和有效利用网络资源,路由与波长分配问题( rwa )又成为研究热点。
Another topic of this paper is rwa algorithms of primary path and protection path . in order to improve survivability of optical network , a new routing and wavelength assignment algorithms - diverse fiber physical routing algorithms is presented 文中从提高网络生存性角度出发，对链路不相关算法进行了改进，提出了一个新的路由波长分配算法?光纤物理路由最大不相关算法。
Chapter two describes the technology require of the dwdm system . comparing the definition and target of technology parameter which should be uesd during the projet . for example , the distribution of the wave length , the interface of the laser , the laser amplifier etc . 第二章描述了目前dwdm系统的技术要求，对在工程应用中需要用到的技术参数(例如波长分配、光接口分类、光放大器等)的定义、要求做了剖析。
To solve these two problems mentioned above and to sate the need of traffic qos , te is needed in the wdm optical network . it is defined as rwa problem that how to rout optical path and allocate net resource according to a set of request in wdm network 在wdm光传送网中,给定一组光路连接需求,通过选路和波长分配算法来建立相应光路的问题称为路由与波长分配问题( routingandwavelengthassignment , rwa )问题。
Reasonable rwa algorithm can be employed to distribute the hardware resourses of the networks effectively and to reduce the blocking probability of the operation requests , as a result the network cost can be considerably diminished and the network performance greatly improved 合理的路由和波长分配方案，可以更为有效地利用和分配网络硬件资源，降低业务请求阻塞率，从而大大减小了网络的运行成本，提高网络性能。
