NGI中反应式一体化容错QoS单播路由机制

在IP/DWDM光Internet中,如何提高其容错能力同时改善其QoS(qualityofservice)是需要解决的主要问题.容错QoS路由是解决该问题的一个有效方法.采用反应式容错策略,基于启发式A算法,设计了一种一体化容错QoS单播路由机制,在寻找路由的同时进行波长分配.该机制以网络延迟、负载、波长转换代价达到平衡的最佳值为目标,兼顾波长资源的高效利用和故障恢复率的提高.仿真研究表明,该机制是可行和有效的.

Reactive Fault-Tolerant Integrated QoS Unicast Routing Scheme for NGI

IP over DWDM optical Internet is one of the main networking techniques for NGI (next generation Internet),and how to improve its fault-tolerant capability and QoS (quality of service) becomes critical,to which the fault-tolerant QoS routing is one of the effective solutions. A reactive fault-tolerant integrated QoS unicast routing scheme is thus proposed on the basis of heuristic A algorithm to seek for proper routing with wavelength assignment simultaneously. Its objective is trying to offer the best balance among delay,load and the cost of wavelength conversion in addition to improving the effective wavelength utilization and failure restoring rate. Simulation results showed that the proposed scheme is feasible and effective.