Secure observer-driven synchronization for complex networks constrained by partial information exchange and limited communication bandwidth

Abstract

This paper addresses the observer-driven secure synchronization control issue for partial information-based complex networks (CNs) subject to bandwidth constraints. Firstly, given that the complete data transmission between CN nodes can not be always realized in practice, the system model of CNs with partial information exchange is specifically introduced. Then, considering the limitation of communication bandwidth, weighted try-once-discard (WTOD) protocol is utilized to enhance the signal transmission efficiency within each node. The delivery of the data adhered to WTOD protocol is further assumed to be compromised by false-data-injection (FDI) attack, which is a well-recognized risk in communication networks. Afterward, distributed secure observer-based synchronization controllers are designed accordingly. Based on defining the observation and synchronization errors, an augmented system model is then established, and the gain matrices for observers and controllers are obtained through an analysis of the stability conditions of the augmented system. Lastly, a numerical example is provided to validate the proposed method’s effectiveness.