Digital twin empowered lightweight and efficient blockchain for dynamic internet of vehicles  

作　　者：Haoye Chai Supeng Leng Jianhua He Ke Zhang 

机构地区：[1]School of Information and Communication Engineering,University of Electronic Science and Technology of China(UESTC),Chengdu,611731,China [2]Shenzhen Institute for Advanced Study,UESTC,Shenzhen,518000,China [3]School of Computer Science and Electronic Engineering,University of Essex,Colchester,CO43SQ,UK

出　　处：《Digital Communications and Networks》2024年第6期1698-1707,共10页数字通信与网络(英文版)

基　　金：supported in part by the National Natural Science Foundation of China under Grant 62171104;the National Key Research and Development Program of China under Grant 2018YFE0117500;the Key Lab of Information Network Security under Grant C19603;in part by the EU H2020 Project COSAFE(MSCA-RISE-2018-824019)。

摘　　要：The Internet of Vehicles(Io V)has great potential for Intelligent Transportation Systems(ITS),enabling interactive vehicle applications,such as advanced driving and infotainment.It is crucial to ensure the reliability during the vehicle-to-vehicle interaction process.Although the emerging blockchain has superiority in handling security-related issues,existing blockchain-based schemes show weakness in highly dynamic Io V.Both the transaction broadcast and consensus process require multiple rounds of communication throughout the whole network,while the high relative speed between vehicles and dynamic topology resulting in the intermittent connections will degrade the efficiency of blockchain.In this paper,we propose a Digital Twin(DT)-enabled blockchain framework for dynamic Io V,which aims to reduce both the communication cost and the operational latency of blockchain.To address the dynamic context,we propose a DT construction strategy that jointly considers the DT migration and blockchain computing consumption.Moreover,a communication-efficient Local Perceptual Multi-Agent Deep Deterministic Policy Gradient(LPMA-DDPG)algorithm is designed to execute the DT construction strategy among edge servers in a decentralized manner.The simulation results show that the proposed framework can greatly reduce the communication cost,while achieving good security performance.The dynamic DT construction strategy shows superiority in operation latency compared with benchmark strategies.The decentralized LPMA-DDPG algorithm is helpful for implementing the optimal DT construction strategy in practical ITS.

关 键 词：Digital twin Blockchain Internet of vehicles Multi-agent DDPG 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]