链路可靠性感知的差异保护虚拟光网络映射

针对弹性光网络的多链路故障影响虚拟光网络映射性能问题，提出一种链路可靠性感知的差异保护虚拟光网络映射（RA-DPVONE）方法.根据光节点的资源特性与相邻链路故障概率，该方法设计了光节点重要性评估准则和优先映射方法.根据候选光路上的可用频谱资源和链路故障概率，设计虚拟链路映射的工作光路和保护光路的链路代价更新公式，仅为不满足可靠性需求的虚拟链路映射资源共享保护光路.仿真结果表明，所提方法能降低网络的带宽阻塞率，提高虚拟网络请求接受率和弹性光网络的频谱资源利用率.

Link Reliability-Aware Protection-Differentiated Virtual Optical Network Embedding

Aiming at the problem that multi-link faults in elastic optical networks affect the performance of virtual optical network mapping,a method of link Reliability-Aware Protection-differentiated Virtual Optical Network Embedding (RA-PVONE) is proposed in the paper.In the RA-PVONE,an importance evaluation criteria and priority mapping method of optical nodes are designed.According to the available spectrum resources and link failure probability of candidate optical paths,the link cost updating formulas for working and protecting optical paths are designed to map the virtual link.Protection optical paths sharing spectrum resource is only configured for working optical path that do not meet the virtual link's reliability requirements.The simulation results show that the proposed method can reduce the network bandwidth blocking probability,improve virtual network acceptance ratio and the spectrum resource utilization.