TY - JOUR
T1 - Secure Short-Packet Communications for Mission-Critical IoT Applications
AU - Wang, Hui Ming
AU - Yang, Qian
AU - Ding, Zhiguo
AU - Poor, H. Vincent
N1 - Funding Information:
Manuscript received July 16, 2018; revised January 13, 2019; accepted February 25, 2019. Date of publication March 20, 2019; date of current version May 8, 2019. The work of H.-M. Wang and Q. Yang was supported in part by the National Natural Science Foundation of China under Grant 61671364, in part by the Outstanding Young Research Fund of Shaanxi Province under Grant 2018JC-003, and in part by the HuaWei Development Fund under Grant YBN2018115166. The work of Z. Ding was supported in part by the U.K. Engineering and Physical Sciences Research Council (EPSRC) under Grant EP/P009719/2, and in part by H2020-MSCA-RISE-2015 under Grant 690750. The work of H. V. Poor was supported by the U.S. National Science Foundation under Grant CCF-093970 and Grant CCF-1513915. The associate editor coordinating the review of this paper and approving it for publication was S. Wang. (Corresponding author: Hui-Ming Wang.) H.-M. Wang and Q. Yang are with the School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China, and also with the Ministry of Education Key Laboratory for Intelligent Networks and Network Security, Xi’an Jiaotong University, Xi’an 710049, China (e-mail: [email protected]; [email protected]).
Publisher Copyright:
© 2019 IEEE.
PY - 2019/5
Y1 - 2019/5
N2 - In applications of the Internet of Things (IoT), the use of short packets is expected to meet the stringent latency requirement in ultra-reliable low-latency communications; however, the incurred security issues and the impact of finite blocklength coding on the physical-layer security are not well understood. This paper investigates the performance of secure short-packet communications in a mission-critical IoT system with an external multi-antenna eavesdropper. An analytical framework is proposed to approximate the average achievable secrecy throughput of the system with finite blocklength coding. To gain more insight, a simple case with a single-antenna access point (AP) is considered first, in which the secrecy throughput is approximated in a closed form. Based on that result, the optimal blocklengths to maximize the secrecy throughput with and without the reliability and latency constraints, respectively, are derived. For the case with a multi-antenna AP, following the proposed analytical framework, closed-form approximations for the secrecy throughput are obtained under both beamforming and artificial-noise-aided transmission schemes. The numerical results verify the accuracy of the proposed approximations and illustrate the impact of the system parameters on the tradeoff between transmission latency and reliability under a secrecy constraint.
AB - In applications of the Internet of Things (IoT), the use of short packets is expected to meet the stringent latency requirement in ultra-reliable low-latency communications; however, the incurred security issues and the impact of finite blocklength coding on the physical-layer security are not well understood. This paper investigates the performance of secure short-packet communications in a mission-critical IoT system with an external multi-antenna eavesdropper. An analytical framework is proposed to approximate the average achievable secrecy throughput of the system with finite blocklength coding. To gain more insight, a simple case with a single-antenna access point (AP) is considered first, in which the secrecy throughput is approximated in a closed form. Based on that result, the optimal blocklengths to maximize the secrecy throughput with and without the reliability and latency constraints, respectively, are derived. For the case with a multi-antenna AP, following the proposed analytical framework, closed-form approximations for the secrecy throughput are obtained under both beamforming and artificial-noise-aided transmission schemes. The numerical results verify the accuracy of the proposed approximations and illustrate the impact of the system parameters on the tradeoff between transmission latency and reliability under a secrecy constraint.
KW - Finite blocklength
KW - physical-layer security
KW - short-packet communications
KW - ultra-reliable low-latency communications
UR - http://www.scopus.com/inward/record.url?scp=85065578815&partnerID=8YFLogxK
U2 - 10.1109/TWC.2019.2904968
DO - 10.1109/TWC.2019.2904968
M3 - Article
AN - SCOPUS:85065578815
SN - 1536-1276
VL - 18
SP - 2565
EP - 2578
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 5
M1 - 8672179
ER -