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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 expansion of power communication networks and the continual increase of power service types, the traditional power communication network based on Synchronous Optical Network (SONET) has been difficult to meet the requirements of dynamic allocation of network resources, considerable traffic control, and traffic-aware traffic scheduling . Software Defined Network (SDN) uses a centralized control plane to enable traffic control from a global perspective. In order to monitor and control the operation status of the power grid in a centralized manner in real time, this paper proposes a power communication network architecture based on SDN. This architecture adopts edge SDN controller at the network convergence layer and cloud-based SDN controller at the core layer. In order to ensure the service quality of power grid service, a service-aware traffic scheduling mechanism is proposed. The mechanism runs on the SDN controller using a priority-based maximum-minimum fair share of bandwidth allocation algorithm. The simulation results show that the traffic scheduling mechanism can improve the throughput of the power grid and the service quality of the service.