【摘要】 为了提高弹性光网络因业务请求较多而导致的资源利用率低和频谱碎片化程度较高等问题，提出基于QoE的弹性光网络频谱分配优化方法。首先建立由网络资源和光网络同时确定的邻接矩阵，以复杂网络理论和图论为基础对路由层面的光网络进行描述，并结合光网络连通度和用户业务请求的路由长度设定优先级，采用最短路径计算方法对多条路径进行选择。然后利用多维帧矩阵对频谱资源进行有效判断，采用频谱复用率确定频谱资源的碎片化程度。最后提出包含三个分配阶段的启发式算法对频谱分配进行优化，在频谱优化过程中，先尝试第一个分配阶段，若失败再进入第二、三个阶段，优先选择频谱资源使用最少和使用时隙总量最小的分配方式。实验结果表明，上述算法在不同负载下具有较低的堵塞率和较高的频谱利用率。更多还原

【Abstract】 In order to improve the problems of low resource utilization and high degree of spectrum fragmentation caused by more service requests in elastic optical networks, a spectrum allocation optimization method based on qoe is proposed. Firstly, the adjacency matrix determined by network resources and optical network was established. Based on complex network theory and graph theory, the optical network at the routing level was described. Combined with the connectivity of optical network and the routing length of user service request, the priority was set, and the shortest path calculation method was used to select multiple paths. Then, the multi-dimensional frame matrix was used to effectively judge the spectrum resources, and the spectrum reuse rate waas used to determine the fragmentation degree of the spectrum resources. Finally, a heuristic algorithm including three allocation stages was proposed to optimize the spectrum allocation. In the process of spectrum optimization, try the first allocation stage first, and then enter the second and third stages if it fails. Priority should be given to selecting the allocation method that minimizes the use of spectrum resources and the total amount of time slots used. Experiment results show that the algorithm has low congestion rate and high spectrum efficiency under different loads.更多还原