Gao Donghui, Zhang Hanyi, Zhou Zhiyu
Opt Express. 2004 Dec 27;12(26):6456-67. doi: 10.1364/opex.12.006456.
For real-time services, protection is preferable for its fast failure recovery in optical networks. Recently, sub-path protection has been proposed to provide scalable and efficient protection. However, it suffers from the long latency in connection provisioning and lack of protection for domain border node (DBN) failures. In this paper, DBN-Pair based Network Partition (DPNP) was presented to solve this problem. We develop the Integer Linear Program (ILP) formulation for network partition, as well as Sub-Path InCorporatE (SPICE) algorithm to provide protection for DBN failures in all routing scenarios. Our simulation results show that DPNP behaves much better than previous approaches in terms of connection blocking ratio, resource utilization efficiency and failure recovery time scalability.
对于实时服务而言，在光网络中保护因其快速的故障恢复能力而更受青睐。近来，提出了子路径保护以提供可扩展且高效的保护。然而，它在连接配置方面存在长延迟问题，并且缺乏针对域边界节点（DBN）故障的保护。在本文中，提出了基于DBN对的网络分区（DPNP）来解决此问题。我们开发了用于网络分区的整数线性规划（ILP）公式，以及子路径合并（SPICE）算法，以在所有路由场景中为DBN故障提供保护。我们的仿真结果表明，在连接阻塞率、资源利用效率和故障恢复时间可扩展性方面，DPNP的表现比以前的方法要好得多。
