基于SRLG约束和资源共享的交迭段保护机制研究

通过对共享风险链路组约束机制和交迭段保护机制的分析,将两者相结合并根据工作和保护路径分别采用动态链路权重调整,提出了一种基于共享风险链路组不相关的交迭段共享保护算法.交迭段共享保护算法在共享风险链路组不相关的约束条件下,为整个工作路由提供了多个交迭的保护段,并给出了一种能够合理有效选择这些交迭保护段的方法.对交迭段共享保护算法的分析和仿真结果表明,与以往保护算法相比,交迭段共享保护算法不但大大提高了网络连接的可靠性,而且还通过不同交迭保护段间资源的合理共享,有效地提高了网络资源的利用率.

Overlapped Segment Shared Protection Scheme Based on SRLG Constraints

Based on analyzing Shared Risk Link Group (SRLG) constraints and overlapped protection scheme,and adjusting on each link weight when computing a working path or protection path dynamically,a novel protection scheme called SRLG-disjoint-based Overlapped segment Shared Protection Algorithm (SOSPA) was proposed.SOSPA provides several overlapped protection segments for a working path with the consideration of SRLG disjoint constraints.A new approach to select these appropriate protection segments was given.The results of analysis and simulation on SOSPA demonstrate that,compared with other traditional protection schemes,SOSPA can improve the reliability of network connection and enhance the efficiency of resource utilization by sharing backup resources among protection segments which belong to SRLG-disjoint working paths.