Event-Triggered Quantized Consensus of Linear Multiagent Systems Under Asynchronous Denial-of-Service Attacks

• 成果类型: Article
• 署名作者: Lin, Na; Ling, Qiang
• 署名单位: Chinese Academy of Sciences; University of Science & Technology of China, CAS
• 刊物名称: IEEE TRANSACTIONS ON AUTOMATIC CONTROL
• ISSN/ISSBN: 0018-9286
• DOI: 10.1109/TAC.2024.3422230
• 发表日期: 2025
• 页码: 697-704
• 关键词: Denial-of-service attack; Consensus protocol; Bit rate; Quantization (signal); bandwidth; Multi-agent systems; DELAYS; denial-of-service (DoS) attacks; event-triggered control; multiagent systems (MASs); quantized consensus

摘要

This article investigates the event-triggered consensus problem for a general linear multiagent system (MAS) under limited feedback bit rates. Moreover, the interagent communication edges of the MAS may be blocked by multiple attackers in an asynchronous manner. Since each agent has to quantize the feedback information into finite-bit symbols before transmissions, an asynchronous attack may break the quantization synchronization among neighboring agents. To mitigate the effects of asynchronous attacks, we design a distributed dynamic encoding-decoding scheme, under which the quantization range and the number of occupied bits of each transmission of every communication edge are independently determined and may vary by DoS attacks. Furthermore, we propose an event-triggered quantized consensus protocol, under which distributed event-triggers determine information transmission over each communication edge. Under the proposed methods, we provide a sufficient average bit rate condition to ensure the asymptotic consensus of the concerned MAS. That bit rate condition depends on the dynamics of agents, the communication topology and denial-of-service (DoS) attacks. The proposed methods still works in MASs with bounded network delay and asynchronous DoS attacks. A numerical example is provided to verify the effectiveness of obtained results.