基于光路负载均衡和邻域匹配的串扰感知资源分配方法

Crosstalk Aware Resource Allocation Method Based on Lightpath Load Balancing and Neighborhood Matching

针对空分复用弹性光网络(Space Division Multiplexing-Elastic Optical Networks,SDM-EONs)的芯间串扰和频谱碎片化问题,该文提出一种考虑业务持续时间、光路邻域资源匹配度及芯间串扰的路由频谱纤芯分配算法.在业务的路由选择阶段,该文设计基于光路负载均衡和频谱碎片减少的路由策略;在纤芯选择阶段,设计兼顾纤芯负载及减少纤芯间串扰的纤芯选择方法;在时-频资源块分配阶段,设计考虑时-频资源碎片变化小和邻域匹配度变化小的资源分配方法.仿真结果表明,该文所提算法可以降低网络带宽阻塞率和提高频谱资源的使用效率.

To solve the problems of inter-core crosstalk and spectrum fragmentation in space division multiplexingelastic optical networks(SDM-EONs),a routing spectrum core allocation with holding time,lightpath’s neighborhood matching degree and inter-core crosstalk(TMD-XT-RSCA)is proposed.In the service routing stage,a routing strategy is designed to balance the lightpath’s load and reduce resource fragment.In the core selection,a core selection method is designed to balance the fiber core’s load and decrease inter-core crosstalk.In the time-spectrum block allocation stage,a resource allocation method through considering small change of time-spectrum fragmentation and small change of neighborhood matching degree is designed.The simulation results show that the proposed TMD-XT-RSCA algorithm can reduce the bandwidth blocking probability and improve the spectrum utilization.