GMPLS网络中的混合共享光路保护算法

Hybrid shared lightpath protection algorithm for GMPLS networks

提出了一种混合共享光路保护(HSLP)算法,用以解决通路保护方法中备份路径建立成功率低的问题。在本算法中,首先执行通路保护方法,如果备份路径建立失败,则动态划分工作路径段。用户的服务请求,包括恢复时间和可靠性等,可以通过限制备份路径的跳数来满足。仿真结果表明,HSLP算法不仅能够获得较低的保护失败率,而且可以使资源利用率与平均恢复时间获得更好的折中。

An hybrid shared lightpath protection （HSLP） algorithm is proposed,to resolve the low successtul probability ot backup paths establishment for path Protection. In this algorithm,path Protection is implemented firstly. If the backup path establishment fails,the primary path will be divided into segments dynamically. The user＇s service requirement such as recovery time and reliability can be guaranteed by limiting the hop count of the backup paths. The simulation results show that the new algorithm can achieve low protection failure probability and gain a better tradeoff between the protection overbuild and the average recovery time.