弹性光网络路由频谱配置算法研究

An adaptive sub-carrier distribution algorithm for routing and spectrum allocation in OFDM-based elastic optical network

针对弹性光网络的特点及已提出的多种路由频谱配置算法,总结出了弹性光网络典型的RSA算法,并在此基础上首次提出了弹性光网络基于自适应子载波分配的路由频谱配置(Adaptive sub-carrier distribution routing and spectrum allocation,ASD-RSA)算法。该算法在弹性光网络中应用子载波分布式排列概念,在很大程度上降低了高负载网络的信号阻塞率,在典型RSA的基础上进一步提高了网络频谱资源的利用率,达到了节省频谱资源的目的。

The typical routing and spectrum allocation （ RSA） algorithm has been introduced for the OFDM-based elastic optical network according to the characteristics of elastic optical network and other algorithms which have already been published and proved to be efficiently in spectrum utiliza-tion. Then an adaptive sub-carrier distribution routing and spectrum allocation （ ASD-RSA） algo-rithm is proposed for the very first time. This algorithm first adopts the idea of distributed sub-carri-ers in elastic optical network. It gets lower network blocking probability in high load network, and improves the usage of network spectrum resources based on the typical RSA algorithm, achieving the goal of saving spectrum resources.