摘要
在研究自动交换光网络(ASON)中发生节点/链路混合故障时的保护方法的基础上,设计了一种同时考虑节点故障和链路故障情况的基于P圈的保护模型,同时给出了一种保证在混合故障时可以达到100%业务恢复率的预配置P圈保护的启发式算法,并且综合考虑了实际网络中保护恢复速度和资源效率等因素,给出了具有最大P圈跳数限制的P圈配置方案。利用OPNET软件搭建了ASON仿真平台,在泛欧Cost239网络拓扑和北美NSFnet网络拓扑上,采用静态业务模型对该算法进行了仿真分析。仿真结果证明,该算法在拥有故障业务快速恢复能力的同时.相比已有算法具有更低的资源冗余度。
On the basis of the research on recovery from node failures and link failures in automatically switched optical networks （ASON）, a hybrid p-cycle protection model was designed. Furthermore, a heuristic p-cycle algorithm for absolutely recovering the network traffic during hybrid protection was proposed, and a p-cycle deployment solution under the limit of maximum p-cycle hop count for practical networks was given. The algorithm can provide hill protection against single node failures, and takes single link failures into consideration as well. The proposed algorithm was evaluated under a static traffic model based on OPNET simulation platform with COST239 and NSFnet topologies. The extensive simulation results show that the proposed algorithm has the advantages of shorter recovery time and lower capacity redundancy compared with the present algorithms.
出处
《高技术通讯》
CAS
CSCD
北大核心
2009年第2期125-129,共5页
Chinese High Technology Letters
基金
863计划(2006AA01Z246)
国家自然科学基金(60702005)
教育部留学归国人员教学科研经费建设和台湾科委会计划(NSC 97-2218-E-161-1002)资助项目
关键词
P圈
混合故障
半跨接
自动交换光网络(ASON)
p-cycle, hybrid protection, half-straddling, automatically switched optical networks （ASON）
