光网络中支持区分业务的损伤感知QoS机制

An impairment-aware QoS mechanism supporting class-based traffic in optical networks

光网络中物理层损伤会造成明显的信号质量下降。为了保证QoS(服务质量),必须在RWA(路由和波长分配)算法中考虑这些损伤及其引起的变化。文章提出了一种损伤感知的差异化路由与波长算法,并针对规则Mesh网络与Cernet网络进行了数值仿真,结果表明,在满足QoS要求的情况下优先保证网络中高等级业务的波长分配,能降低高等级业务的阻塞率,并能提高网络总体的资源利用率。

Physical layer impairments in optical networks can cause significant degradation of signal quality.In order to ensure QoS,it is necessary to consider these impairments and the resulted variations in the Routing and Wavelength Assignment（RWA）algorithm.This paper proposes an impairment-aware differentiated RWA algorithm and conducts numerical simulations of regular Mesh networks and Cernet networks.The results show that in the case of satisfying QoS demands,giving priority to ensuring the wavelength assignment for the high-class services in the networks reduces their blocking probability and improves the overall network resource utilization rate.