多光纤WDM网中支持QoS的波长重路由算法

在WDM网上，波长连续性限制会降低网络的信道利用率，增加光路建立请求的阻塞率。采用波长重路由技术可以减少波长连续性限制对网络性能的影响。该文采用波长图模型，对多光纤WDM网中支持QoS的波长重路由算法进行了探讨，提出一种支持QoS的波长重路由算法－－动态选择法，并采用两种网络模型，在不同负载的动态业务下对所提算法进行了仿真研究；仿真结果表明所提算法既满足了上层业务不同的QoS要求，同时又充分利用了有限的网络资源，使全网的平均阻塞率降低。

Qos-based wavelength rerouting algorithms in multi-flber wdm optical transport networks

Wavelength continuity constraint leads to inefficient utilization of wavelength channels and results in higher blocking probability in WDM optical transport networks. In order to weaken the inefficiency of the constraint, wavelength rerouting is used. Based on a wavelength graph model, the QoS-based wavelength rerouting strategy, dynamic selection method, is proposed. Simulation results of the network performance in different dynamic traffic loads are given. The results show that the method can not only meet the different QoS requirements of the client layer's service, but also utilize the finite networking resources efficiently with reduced blocking probability.