PTN网络的二次断纤链路规划算法  

Dual-link Fiber Disconnected Capacity Planning Algorithm in PTN

作　　者：罗伟[1] 李兴明[1] 吴简[1] 陈捷[2] 

机构地区：[1]电子科技大学光纤传感与通信教育部重点实验室,四川成都611731 [2]中兴通讯股份有限公司,广东深圳518057

出　　处：《计算机技术与发展》2012年第7期13-16,共4页Computer Technology and Development

基　　金：2011中兴通讯基金资助项目(090016)

摘　　要：在PTN(Packet Transport Network)网络规划建设中,需要对光纤链路留出备份带宽,以保证部分光纤断开时,受影响业务有足够的容量进行路由重组。这也是提高网络生存性的有效方法之一。文中首先遍历网络双链路的失效状态,然后断开网络中任意两条链路,通过逐次增加链路容量来保证失效业务能够重组路由;最后提出二次断纤链路容量规划算法并进行试验仿真。结果表明,该算法在节约网络带宽、降低建造成本以及故障容错方面有着良好性能,能够很好应用于传送网络的链路规划中。In the PTN network planning ＆construction,leaving backup bandwidth for optical fibers is an effective method to improve net- work survivability. It ensures that parts of the fiber links are disconnected, and the affected businesses still have sufficient capacity for re- sources re-routing. In this paper,first look through every network dual-link failure state,then disconnect any two links in the network,af- ter that increase link capacities to assure all failed services can be successfully re-routing again;At last propose the dual-link fiber discon- nected capacity planning algorithm （DDCPA） and carry out simulation experiments. The results show that the algorithm effectively saves network bandwidth, reduces construction cost and improves fault tolerance, also has a good performance in link planning of transmission network.

关 键 词：分组传送网 双链路失效 网络容量规划 路由重组 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]