WDM疏导网络中的动态光路保护算法

研究了WDM疏导网络的生存性问题,提出一种保护图模型来有效反映网络当前状态·基于该模型提出两种支持多粒度业务的动态专用光路保护算法:最小波长链路法(MWM)和最小收发器法(MTM)·MWM总是选用需要新占用WLE最少的路径建立连接,而MTM则尽量选择占用收发器对最少的路径建立连接·在不同负载的动态业务下对所提算法进行了仿真研究,结果表明,MTM所需仿真时间略低于MWM,而MWM具有更低的阻塞率和更高的业务通过率·

Dynamic Lightpath Protection in WDM Grooming Networks

Under the constraints of the number of transceivers per node and wavelength continuity, the problem of provisioning dependable connections with different bandwidth granularities in wavelength division multiplexing (WDM) mesh networks was investigated. A novel protection graph model (PGM) was proposed to represent current state of the network such as transceivers, wavelengths, protected-lightpaths and bandwidth. Based on PGM, two dynamically dedicated lightpath-protection algorithms named minimal wavelength-link method (MWM) and minimal transceiver method (MTM) were developed. Based on dynamic traffic of different loads, the performances of the two schemes have been investigated via simulations. The results show that MWM outperforms MTM in blocking probability and traffic throughput, while the simulation time of MTM is little less than that of MWM.