IP over WDM网络中可生存的路由选择策略

Survivable routing strategy in IP over WDM networks

在IPoverWDM网络中,单链路故障可能会使虚拓扑变得不连通而导致IP网络无法恢复受损业务,在设计虚拓扑时必须避免这种情况。SVTMA算法采用负载均衡策略,在保证网络生存性的同时,严格遵守物理链路的容量限制。实验表明,使用SVTMA算法进行虚拓扑设计所需的波长数小于SMART算法所需的波长数,使得整个网络的负载分布更加均衡。

In IP over WDM networks, the failure of a physical fiber may leave the virtual topology unconnected, which will make the restoration of infected traffic in the IP layer impossible. This problem must be avoided during design of virtual topology. SVTMA proposed in this paper applies load-balancing strategy. It can not only ensure survivability of the network, but also conform to capacity SMART algorithm, SVTMA needs fewer wavelengths and constraint. Simulation results show that compared with can distribute the load in a more balanced way.