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

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.