Without considering security, existing message scheduling mechanisms may expose critical messages to malicious threats like confidentiality attacks. Incorporating confidentiality improvement into message scheduling, t...Without considering security, existing message scheduling mechanisms may expose critical messages to malicious threats like confidentiality attacks. Incorporating confidentiality improvement into message scheduling, this paper investigates the problem of scheduling aperiodc messages with time-critical and security-critical requirements. A risk-based security profit model is built to quantify the security quality of messages; and a dynamic programming based approximation algorithm is proposed to schedule aperiodic messages with guaranteed security performance. Experimental results illustrate the efficiency and effectiveness of the proposed algorithm.展开更多
采用通用网络CAN(Controller Area Network)实现网络化多轴运动控制系统,提出一种基于分布式动态消息调度策略的报文广播法,并且分析了消息可完全调度的必要条件。实验表明,该策略可有效地保证各站点的时间同步和消息传输的实时性,可使...采用通用网络CAN(Controller Area Network)实现网络化多轴运动控制系统,提出一种基于分布式动态消息调度策略的报文广播法,并且分析了消息可完全调度的必要条件。实验表明,该策略可有效地保证各站点的时间同步和消息传输的实时性,可使系统具有较好的性能。展开更多
针对网络控制系统(NCS)中网络带宽等网络资源受限制的情况,对目前NCS信息调度的研究现状进行了综述.首先介绍了NCS的背景和基本概念,阐述了网络的引入带来的各种影响.然后研究了NCS的动态特性,对现有的信息调度策略和调度方法进行了总...针对网络控制系统(NCS)中网络带宽等网络资源受限制的情况,对目前NCS信息调度的研究现状进行了综述.首先介绍了NCS的背景和基本概念,阐述了网络的引入带来的各种影响.然后研究了NCS的动态特性,对现有的信息调度策略和调度方法进行了总结与分析.进一步分析了在资源受限时如何进行有效的信息调度以保证较高的网络服务质量QoS(Quality ofService)和较好的控制品质QoC(Quality of Control),对一些控制与调度协同设计的研究进行了说明.最后,结合前面的研究分析,讨论了该领域今后进一步的研究方向.展开更多
基金supported by the National Natural Science Foundation of China (60673142)the National High Technology Research and Development Progrm of China (863 Program) (2006AA01Z1732007AA01Z131)
文摘Without considering security, existing message scheduling mechanisms may expose critical messages to malicious threats like confidentiality attacks. Incorporating confidentiality improvement into message scheduling, this paper investigates the problem of scheduling aperiodc messages with time-critical and security-critical requirements. A risk-based security profit model is built to quantify the security quality of messages; and a dynamic programming based approximation algorithm is proposed to schedule aperiodic messages with guaranteed security performance. Experimental results illustrate the efficiency and effectiveness of the proposed algorithm.
文摘针对网络控制系统(NCS)中网络带宽等网络资源受限制的情况,对目前NCS信息调度的研究现状进行了综述.首先介绍了NCS的背景和基本概念,阐述了网络的引入带来的各种影响.然后研究了NCS的动态特性,对现有的信息调度策略和调度方法进行了总结与分析.进一步分析了在资源受限时如何进行有效的信息调度以保证较高的网络服务质量QoS(Quality ofService)和较好的控制品质QoC(Quality of Control),对一些控制与调度协同设计的研究进行了说明.最后,结合前面的研究分析,讨论了该领域今后进一步的研究方向.
