For saving the source of wavelength in WDM networks,the multicast routing is used in the static traffic grooming algorithm.The traffic grooming trees are constructed for the implement of traffic grooming,and the grooming trees are minimized to decrease the consumption of wavelength.So the traffic between the network nodes is grouped,and the packing algorithm is used for reducing the group numbers.In order to realize the path sharing after traffic packing,the minimum spanning tree is constructed....