Overlapped Segment Shared Protection Scheme Based on SRLG Constraints
基于SRLG约束和资源共享的交迭段保护机制研究

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.