灵活栅格光网络中时变业务的频谱分配

Spectrum allocation for time-varying servicces in flexgrid optical networks

在灵活栅格光网络中,为了解决时变业务中频谱的时变分配问题,提出了一种新型的基于NCVC(非邻接性虚拟连接)的时变业务频谱分配方案。该方案在不改变传输业务已分配频谱块的基础上,允许为传输业务增加的带宽需求分配与之不相邻的新频谱块,以满足业务在传输过程中变化的带宽需求。采用OMNeT++仿真软件搭建了灵活光网络的仿真平台,仿真实验证明,该方案可以有效地降低网络阻塞率,提高网络频谱资源的利用效率。

In order to address the problem of spectrum allocation for time-varying services in flexgrid optical networks,this paper proposes a novel scheme of spectrum allocation,which is mainly based on Non-Contiguous Virtual Connections(NCVC).In this scheme,new non-contiguous spectrum blocks can be allocated to satisfy the increased bandwidth requirement of the service transmission without changing the already allocated spectrum blocks.Simulations are performed on the simulation platform built by using the OMNeT++ software and the numerical results show that this scheme can effectively reduce the network blocking probability and improve the utilization efficiency of network spectrum sources.