EONs中一种混合路径专有保护算法

为了降低带宽阻塞率,节约频谱资源,在动态业务到达的弹性光网络(EONs)场景下,不同业务请求的路径状况可能不同,因此不能确定单路径专有保护与带宽分割多路径专有保护的优劣.文章结合单路径专有保护和带宽分割多路径专有保护提出了一种混合路径专有保护(HDPP)算法.该算法利用路径的单位频谱效率和路径跳数计算了k条链路不相关候...

A Hybrid Dedicated Path Protection Strategy in EONs

In order to reduce the bandwidth blocking rate and the consumption of spectrum resources in dynamic networks,the path conditions of different service requests may be different.Therefore,it is impossible to determine the advantages and disadvantages of single-path dedicated protection and partitioning dedicated path protection.In this paper,a Hybrid Dedicated Path Protection(HDPP)routing spectrum allocation strategy is proposed by combining single-path dedicated protection and partitioning dedicated path protection.This strategy considers the distance adaptive modulation and the number of path hops pre-calculated k link disjoint candidate paths.We also propose a Multiple Path Spectrum Assignment(MPSA)strategy that considers the highest spectrum efficiency per unit frequency slot with the number of path hops and the maximum available spectrum information on the path.HDPP selects the best scheme among multiple survivability routing spectrum allocation schemes.The simulation results show that the proposed algorithm has better performance in terms of blocking rate and spectrum utilization compared with other algorithms.