自动交换光网络中分级子网恢复机制  

Hierarchical subnet restoration in automatically switched optical networks

作　　者：王超[1] 郑小平[1] 李艳和[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2005年第10期1364-1367,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高技术项目(2003AA122220);国家自然科学基金资助项目(60132020)

摘　　要：为了提高网络的生存性,该文提出了一种新型的适合于大规模自动交换光网络的快速分级子网恢复机制。该机制充分利用自动交换光网络分层路由的灵活性,采用分级的子网恢复信令过程和最短路恢复路径选择算法。在提高网络资源利用率的同时,极大地降低了网络的恢复时间。对这种新机制的信令过程进行了详细地描述和分析,并通过仿真计算与其他几种传统恢复机制的性能进行了比较,结果表明:对于跨多个域的连接,分级子网恢复机制具有更低的平均恢复时间;同时发现,缩小子网规模,可以进一步减少恢复时间。A fast hierarchical subnet restoration method was developed to improve the survivability of large scale automatically switched optical networks （ASON）, This restoration mechanism takes full advantage of the agility of hierarchical routing and uses the SPF routing algorithm for the hierarchical signal processing, which greatly improves the network resource utilization efficiency while simultaneously reducing the restoration time, The performance of the hierarchical subnet restoration method was analyzed based on the simulated restoration time. The results show that for connections across multiple domains, this method has a faster restoration time and the restoration time can be further reduced by reducing the subnet scale.

关 键 词：自动交换光网络 分级恢复 分层路由 

分 类 号：TN915.5[电子电信—通信与信息系统]