【摘要】 在WDM网络中,将使用不同波长的光通路连接起来需要进行波长转换。由于波长转换器的成本较高,且使用过多的波长转换器会增加传输时延,在进行波长路由分配时应尽可能减少波长转换的次数。文章提出了一种建立一棵多播树的算法,该方法具有最少的波长转换次数,能有效地减少时延。更多还原

【Abstract】 A wavelength conversion is required at the joint of two lightpaths if they use different wavelengths in WDM networks.It is expensive to use wavelength convertor,which causes a long delay.So it is better to minimize the number of wavelengths conversion.This paper proposes an algorithm to construct a multicast tree,which need minimal wavelength conversion and can reduce the wavelength cost and the delay of multicast communications effectively.更多还原