高质量分层结构电信网络设计中的可靠性问题研究

Research on Reliability for High Quality and Multi Level Telecom Network Design

可靠性问题是电信网络优化设计的核心问题之一,在光缆网拓扑结构已知前提下,给出了满足可靠性要求的电信级服务质量有关业务的性能指标,建立了时延、时延抖动和IP路由跳数等性能指标约束条件,以最小化IP和传输两层网络建设费用为目标的非线性混合整数规划模型,然后重点研究可靠性问题,结合问题的分层结构,将其转化为结构可靠和带宽可靠两个子问题,分别给出了IP层节点失效和传输层路段失效两种情况的解决方案,测试结果说明了可靠性对网络流量的影响.最后对全文进行了总结,并对下一步的研究工作进行了展望.

Reliability problem is one of the key issues of Telecom Network Design（TND）.This paper focuses on optimizing the construction of reliable telecom network which aims to minimize the cost of constructing IP network and transport layer network,with the restriction of meeting QoS on time delay,time delay tingle and routing hops based on existing optic-cable configuration.Then the reliable analyses are given.Considering the multi-layer structure of the problem,we decompose the reliable problem into two sub-problems,that is,structure reliable and bandwidth reliable problem.The solution method and reliable scheme are proposed for two case of IP node failure and transport layer link failure.Numerical results are given to verify the influence of reliability on network flows and related conclusion is drawn.At last,summary is given and future research issues are proposed.