Secrecy Performance Analysis of Cooperative Nonorthogonal Multiple Access in IoT Networks

被引:6
|
作者
Rauniyar, Ashish [1 ]
Osterbo, Olav N. [2 ]
Hakegard, Jan Erik [1 ]
Engelstad, Paal E. [3 ]
机构
[1] SINTEF Digital, Connect Technol & Platforms Dept, N-7034 Trondheim, Norway
[2] Telenor Res, N-1360 Oslo, Norway
[3] Univ Oslo, Dept Technol Syst, Autonomous Syst & Sensor Technol Res Grp, N-0316 Oslo, Norway
关键词
NOMA; Internet of Things; Relays; Wireless sensor networks; Security; Wireless communication; Uplink; Capacity; cooperative communications; eavesdropper; Internet of Things (IoT); jamming; nonorthogonal multiple access (NOMA); secrecy; sensors; PHYSICAL LAYER SECURITY; WIRELESS NETWORKS; ARCHITECTURE;
D O I
10.1109/JSEN.2022.3199540
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Differentsystemmodels utilizing nonorthogonal multiple access (NOMA) have been successfully studied to meet the growing capacity demands of the Internet of Things IoT) devices for the next-generation networks. However, analyzing the antieavesdropping for NOMA systems under different scenarios and settings still needs further exploration before it can be practically deployed. Therefore, in this article, we study the secrecy performance of a cooperative NOMA system in the IoT networks where two source nodes communicate with their respective destination nodes via a common relay in the presence of an eavesdropper. Specifically, two source nodes send their data in parallel over the same frequency band to the common relay node using uplink NOMA. Then, the relay node forwards the decoded symbols to the respective destination nodes using downlink NOMA in the presence of an eavesdropper. To enhance the security performance of the considered system, we study and propose an artificial noise (AN)-aided scheme in which the two destination nodes emit a jamming signal to confuse the eavesdropper while receiving the signal from the common relay node. We also study the effect of NOMA power allocation, perfect successive interference cancellation (pSIC), and imperfect successive interference cancellation (ipSIC) on the considered system. Analytical expressions for the ergodic capacity (EC), ergodic secrecy sum rate (ESSR), and secrecy outage probability (SOP) are mathematically derived and verified with the simulation results. Our results demonstrate that a significantly higher ESSR and lower SOP of the system can be attained compared to a conventional NOMA system without a destination-assisted jamming signal scheme.
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页码:19030 / 19045
页数:16
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