摘要
Mobile distributed caching(MDC)as an emerging technology has drawn attentions for its ability to shorten the distance between users and data in the wireless network.However,the DC network state in the existing work is always assumed to be either static or real-time updated.To be more realistic,a periodically updated wireless network using maximum distance separable(MDS)-coded DC is studied,in each period of which the devices may arrive and leave.For the efficient optimization of the system with large scale,this work proposes a blockchain-based cooperative deep reinforcement learning(DRL)approach,which enhances the efficiency of learning by cooperating and guarantees the security in cooperation by the practical Byzantine fault tolerance(PBFT)-based blockchain mechanism.Numerical results are presented,and it illustrates that the proposed scheme can dramatically reduce the total file download delay in DC network under the guarantee of security and efficiency.
作者
张正
Yang Ruizhe
Yu Fei Richard
Zhang Yanhua
Li Meng
Zhang Zheng;Yang Ruizhe;Yu Fei Richard;Zhang Yanhua;Li Meng(Faculty of Information Technology,Beijing University of Technology,Beijing 100124,P.R.China;Department of Systems and Computer Engineering,Carleton University,Ottawa K1S5B6,Canada)
基金
Supported by the National Natural Science Foundation of China(No.61571021,61901011)
the Program of China Scholarship Council(No.201806540039).