文章通过对波长路由光网络中路由与波长分配(RWA)问题的研究, 介绍了求解路由子问题和波长分配子问题的常用方法, 总结了3种类型的RWA问题的优化解决方法, 最后对目前RWA算法设计中存在的问题进行了分析并阐述了解决此类问题的重要性。

A novel wavelength assignment scheme called the wavelength pre-assignment collision schedule (WPCS) is proposed for wavelength-routed networks. The WPCS pre-assigns the wavelength at the forward detection phase, and schedules the potential collision by priority. The potential collision is scheduled at the forward detection phase and the blocking of the wavelength assignment is reduced. Simulation is conducted with several other existing schemes. The numerical results show thatWPCS performs better than other schemes in blocking probability under various traffic conditions.

波长预留协议用于在光通道建立过程中预留和配置波长。目前已有的波长预留协议都把协议设计的目标定为降低网络阻塞率，没有一种协议设计把目标定为缩短光通道的建立时间和简化协议处理过程。然而更短的建立时间和更小的协议复杂度对于未来极其动态的光网络却是非常重要的。提出了一种新颖的用于波长路由光网络的分布式快速波长预留协议－目的端预留协议，它在保证网络阻塞率可以接受的前提下，不仅可以降低连接建立时间，还可以减少控制节点处理器需要处理的信令消息数量。仿真结果证明了这一点。