IP/DWDM光因特网中的容错路由选择机制

Fault-Tolerant Routing Mechanisms in IP/DWDM Optical Internet

研究了IP/DWDM光因特网中的容错路由选择机制,对动态到达的光路请求进行路由选择和波长分配,并且提供故障光路恢复能力·在考虑网络负载均衡的基础上,为光路请求进行路由选择·以减少端到端延迟为目的,提出一种启发式算法进行波长分配·针对光路上的单点/多点故障(包括链路故障、节点故障和信道故障),基于预防式和反应式容错模式,设计了四种容错路由选择机制·仿真结果表明,提出的这些机制是可行和有效的·

Different fault-tolerant routing mechanisms in IP/DWDM optical Internet are discussed. The problem of routing and wavelength assignment with dynamic single/multiple point failures in demand of dynamic traffic is dealt with, such as link/node/channel failure. The proposed routing algorithm takes load balancing into account, and a heuristic wavelength assignment algorithm is proposed to reduce the end-to-end delay. Based on preventive and reactive schemes, four fault-tolerant mechanisms are put forward. Simulation results have shown that the proposed mechanisms are feasible and effective.