Xing Mengping, Lu Jianquan, Qiu Jianlong, Shen Hao
IEEE Trans Cybern. 2023 Jan;53(1):102-113. doi: 10.1109/TCYB.2021.3090406. Epub 2022 Dec 23.
This article investigates the synchronization of communication-constrained complex dynamic networks subject to malicious attacks. An observer-based controller is designed by virtue of the bounded encode sequence derived from an improved coding-decoding communication protocol. Moreover, taking the security of data transmission into consideration, the denial-of-service attacks with the frequency and duration characterized by the average dwell-time constraint are introduced into data communication, and their influence on the coder string is analyzed explicitly. Thereafter, by imposing reasonable restrictions on the transmission protocol and the occurrence of attacks, the boundedness of coding intervals can be obtained. Since the precision of data is generally limited, it may lead to the situation that the signal to be encoded overflows the coding interval such that it results in the unavailability of the developed coding scheme. To cope with this problem, a dynamic variable is introduced to the design of the protocol. Subsequently, based on the Lyapunov stability theory, sufficient conditions for ensuring the input-to-state stability of the synchronization error systems under the communication-constrained condition and malicious attacks are presented. The validity of the developed method is finally verified by a simulation example of chaotic networks.
本文研究了受恶意攻击的通信受限复杂动态网络的同步问题。借助于从改进的编解码通信协议导出的有界编码序列，设计了一种基于观测器的控制器。此外，考虑到数据传输的安全性，将具有平均驻留时间约束所表征的频率和持续时间的拒绝服务攻击引入数据通信，并明确分析了它们对编码器字符串的影响。此后，通过对传输协议和攻击的发生施加合理限制，可以得到编码区间的有界性。由于数据的精度通常是有限的，可能会导致待编码信号溢出编码区间的情况，从而导致所开发的编码方案不可用。为了解决这个问题，在协议设计中引入了一个动态变量。随后，基于李雅普诺夫稳定性理论，给出了在通信受限条件和恶意攻击下确保同步误差系统输入到状态稳定的充分条件。最后通过混沌网络的仿真例子验证了所提方法的有效性。
