基于软件定义的电力通信网络业务感知流量调度机制研究

A Software Defined Service-Aware Traffic Scheduling Mechanism for Power Grid Communication Networks

随着电力通信网络的扩张以及电力业务种类的持续增加,传统基于同步光网络(Synchronous Optical Network,SONET)的电力通信网络已经难以满足网络资源动态分配、流量可观可控、业务感知流量调度的需求。软件定义网络(Software Defined Network,SDN)采用集中的控制平面,能够实现全局化视角下的流量控制。为实时集中地监测和控制电网的运行状态,本文提出了一种基于SDN的电力通信网络架构。该架构在网络的汇聚层采用边缘SDN控制器,核心层采用云化SDN控制器。为保障电网业务的服务质量,提出了一种业务感知的流量调度机制。该机制运行在SDN控制器上,采用基于优先级的最大-最小公平共享带宽分配算法。仿真结果表明该流量调度机制能提高电网的吞吐量以及业务的服务质量。

With the rapid expansion of the power grid communication network and the continuous increase of the power grid services, the traditional SONET-based power grid communication network is difficult to meet the requirements of dynamic allocation of network re- sources. Software Defined Network （SDN）adopts a centralized control plane to enable traffic control in a global perspective. In order to monitor and control the running status of the power grid in real time, a SDN-based power grid communication network architecture is proposed. This architecture uses the edge controllers at the convergence network layer and the core layer adopts the cloudy SDN controllers. To guarantee the service quality of grid service, a service- aware traffic scheduling mechanism is proposed. The mechanism running on the controller, utilize the priority-based maximum-minimum fair sharing bandwidth allocation algorithm. Simulation results show that the mechanism improves the network performance.