弹性分组环网的生存性研究

高速网络中，任何可能发生的故障都将引起不可估量的损失和网络整体性能的极度恶化．因此，作为城域网的弹性分组环网，其生存性问题也是必须研究并解决的重要问题之一．本文分析了一种新的故障场景并提出一种改进源路由保护机制来实现环网保护，同时对RPR网络拓扑结构建立了数学模型来分析3种保护机制．最后，通过对网络的吞吐量和延迟等参数的分析，在理论上和仿真试验上对3种保护机制进行了各种性能的比较和评估，分析了具有最大生存性潜力的第3种保护机制——可控源路由保护机制．

Investigation on Survivability of Resilient Packet Ring Networks

Any failure will induce huge disasters and deterioration of the network performance.So as metropolitan network,the survivability is one of the important issues in Resilient Packet Ring(RPR) networks.This paper analyzes a new failure scenario and proposes a new protection mechanism nemed as C-steering.The mathematical model has been established to investigate the survivability of the RPR network in three operation methods.The throughput-delay performance and link utilization are dis- cussed theoretically and experimentally.