Outage-driven link selection for secure buffer-aided networks

作     者：Dawei WANG Tianmi HE Fuhui ZHOU Julian CHENG Ruonan ZHANG Qihui WU 

作者机构：School of Electronics and InformationNorthwestern Polytechnical University College of Electronic and Information EngineeringNanjing University of Aeronautics and Astronautics National Mobile Communications Research LaboratorySoutheast University School of EngineeringThe University of British Columbia Research & Development Institute of Northwestern Polytechnical University in Shenzhen Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum SpaceNanjing University of Aeronautics and Astronautics 

出 版 物：《Science China(Information Sciences)》 (中国科学:信息科学(英文版))

年 卷 期：2022年第65卷第8期

页      面：197-212页

核心收录：

学科分类：11[军事学] 080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 1105[军事学-军队指挥学] 0809[工学-电子科学与技术（可授工学、理学学位）] 0839[工学-网络空间安全] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 110505[军事学-密码学] 110503[军事学-军事通信学] 

基　　金：supported in part by National Natural Science Foundation of China (Grant Nos. 61901379, 61941119, 62071223, 62031012) in part by National Key Research and Development Project (Grant No. 2020YFB1807602) in part by Young Elite Scientist Sponsorship Program by CAST in part by Open Research Fund of National Mobile Communications Research Laboratory, Southeast University (Grant No. 2020D04) in part by Foundation of the Science, Technology, and Innovation Commission of Shenzhen Municipality (Grant No. JCYJ20190806160218174) 

主　　题：buffer-aided relay information delay link selection secrecy outage probability 

摘      要：In this paper, we investigate secure communication in a two-hop wireless network, where multiple buffer-aided relays assist to securely forward data from the sender to the destination threatened by a passive eavesdropper. To satisfy the security and delay requirements, we propose a novel link selection policy without the instantaneous wiretap channel state information. Different from the most current link selection policies,the proposed link selection policy is designed by joint considering the link secrecy outage probability and the buffer states. To evaluate the secrecy performance, we first characterize the system state transition matrix and the stationary state probability, and then derive the closed-form expressions for the secrecy outage probability and the secrecy rate. Moreover, we formulate a framework based on the queuing theory to analyze the end-to-end information delay at the source, the relays, and the queues, and derive the closed-form expression for the information delay. Finally, we conduct simulations to validate our theoretical performance analysis, and verify the performance improvement of the proposed outage-driven secure transmission scheme in terms of secrecy outage probability and information delay.