网络控制系统的数据丢包问题研究

Studying data packet loss based on software network control system

本项目研究离散时间网络控制系统的均方镇定问题。近年,基于Open Flow协议的软件定义网络(SDN)成为最热门的网络技术,被广泛应用于云计算、大数据和服务器虚拟化等领域。然而,由于通讯资源限制,数据在SDN传输中不可避免会发生丢包和通讯延时,这些不稳定性会破坏系统性能,甚至造成系统的不稳定。基于此,本论文研究内容包括以下几方面:1)针对数据丢包的SDN控制系统,基于随机控制理论,给出镇定的充分必要条件及控制器设计方法;2)研究丢包概率对镇定性的影响,针对标量系统,给出最大丢包概率的解析形式。

This project studies the mean square stabilization problem of discrete time network control system.Software defined network(SDN)based on Open Flow protocol,as the most popular network technology,is widely used in cloud computing,big data and other fields.However,due to the limitation of communication resources,packet loss and transmission delay are inevitable in SDN transmission,which can destroy the system performance and even destabilize the whole system.Therefore,this research includes the following twofold contributions.First,for the SDN control system with data packet loss,based on the stochastic control theory,the necessary and sufficient condition of stabilization is given,while the controller design method is given.Second,for scalar system,the explicit maximum packet dropout rate is developed.