满足电力通信业务时延容忍度的SDN控制策略

SDN Control Strategy for Delay Tolerance of Power Communication Service

实时性与灵活性的平衡,是软件定义网络(SDN)技术在电力通信网中应用的关键点之一。通过对传统架构下传输网与数据网的时延进行测算,分析得出SDN架构下2种流表下发模式对控制时延的影响,在仿真和测试环境中,基于电力通信业务端到端时延的容忍度,提出基于SDN的跳数控制策略和混合模式流表下发策略,经分析得出:SDN引入的额外控制时延,可以通过对跳数进行控制,从而满足时延容忍度;混合模式流表下发策略可以在满足时延容忍度的前提下,动态平衡实时性与灵活性。

The balance between real-time and flexibility is one of the key points for application of SDN technology in power communication networks. Delay calculation of transmission network and data network under traditional architecture as well as the influence of two flow table release mode on control delay under SDN architecture are described in the article. In simulation and test environment, through comparative analysis, hop control strategy and hybrid mode flow table release strategy are proposed based on end- to-end service time delay of power communication. It is concluded that 1） the additional control delay introduced by SDN can be controlled by hop controlling to meet the delay tolerance, 2） the hybrid mode flow table strategy can dynamically balance real-time and flexibility under the premise of satisfying the delay tolerance.