战术网中基于POF的动态可伸缩控制方案研究

POF-Based Dynamic Scalable Control Scheme in Tactical Networks

现代战术网中的业务越来越复杂,现有的网络控制方案难以有效支持。软件定义网络(Software Defined Network,SDN)架构可以提高战术网灵活性,但由于战术网脆弱的无线环境特征及SDN的集中式控制特点,该架构存在很高的单点故障风险,控制信道的失效会导致整个网络崩溃。针对这一问题,提出了一种基于协议无感知转发(Protocol Oblivious Forwarding,POF)的动态可伸缩控制方案。采用带内带外混合控制的方法,可以在环境高度动态的战术网中实现韧性控制。当带外控制信道失效后,网络可以基于带内控制与数据平面自定义协议相结合的方式,继续维持一定的网络功能。实验结果表明,本方案对于不稳定的战术网有较强的适应能力,在带外控制失效信道时仍能保障网络可用并使时延保持在0.1 s左右的范围。

Services in modern tactical networks are increasingly complex,which poses challenges to existing network control schemes effciently.Software-defined networking(SDN)can improve the flexibility of tactical networks.Still,due to the fragile wireless environment characteristic of tactical networks and the centralized control characteristics of SDN,the architecture has a high risk of a single point of failure,and the failure of control channel can cause the entire network to collapse.To address this problem,a protocol oblivious forwarding(POF)based dynamic scalable control scheme is proposed.This scheme enables resilient control in tactical networks with highly dynamic environments through hybrid in-band and out-of-band control.Specifically,when the out-of-band control channel fails,the network can continue to maintain part of the network function based on the proposed control scheme.The experiments are performed on a real tactical network dataset.The results show that the proposed scheme can achieve resilient control in unstable tactical networks.When the out-of-band control channel fails,the network is still available,and the delay is kept at about O.1 seconds.