具有共享风险组特性的ONT路径多样性分析

Analysis of path diversity with shared risk group in optical transport network

网络生存性是光传输网络(ONT)设计中最重要的问题。光传输网络中基于逻辑拓扑建立的双重路由,普遍存在共享风险组特性,降低了网络的可靠性。因此,在构造网络模型逻辑分级拓扑的基础上,结合物理分级拓扑中的路径多样性,可以解决物理拓扑中共享管道、节点、链路或域失败的危险,提高网络可生存性。

Survivability of network is the most importment in designing optical transport network. There existed the characteristic of Shared Risk Group （SRG） in BLSRs, which reduces the reliability of network.. Hence, on the basis of constructing logical Hierarchy topology of network model ,achieving path diversity combined with physical Hierarchy, can solve the risk of the failure in shared conduit ,node ,link and region in physical topology, which can improve Survivability of network.