研究了具有波长转换功能的WDM光网络的分类以及已有的几种波长分配算法,分析了波长分配算法的一般流程。文中以波长变换次数最少做为所提出的波长分配算法的主要优化目标,根据WDM光网络中的节点是否具有波长转换的功能,结合等价光路由替换的思想,提出了在稀疏有限波长转换光网络中的一种启发式的波长分配算法。仿真实验表明,当光网络中的连接请求量较大时,该算法的阻塞率低于已有的一些波长分配算法,连接能力有了较大提高。
Discusses three kinds of optical networks with wavelength conversion and come presented wavelength assignments. Based on node's functions and equivalent light- route, proposed a heuristic WA which minimize the number of wavelength conversion for WDM optical networks with sparse- limited wavelength conversion. The analytical and simulation results show that when the traffic is heavy, the proposed WSTF algorithm can provide a much lower hloeking probability than some other previously proposed WA algorithms.