Secure Information Transmissions in Wireless-powered Cognitive Radio Networks for Internet of Medical Things

Tang, Kun; Tang, Wenjuan; Luo, Entao; Tan, Zhiyuan; Meng, Weizhi; Qi, Lianyong

Abstract

In this paper, we consider the issue of the secure transmissions for the cognitive radio-based Internet of Medical Things (IoMT) with wireless energy harvesting. In these systems, a primary transmitter (PT) will transmit its sensitive medical information to a primary receiver (PR) by a multi-antenna-based secondary transmitter (ST), where we consider that a potential eavesdropper may listen the PT's sensitive information. In the meanwhile, the ST also transmits its own information concurrently by utilizing spectrum sharing. We aim to propose a novel scheme for jointly designing the optimal parameters, i.e., energy harvesting (EH) time ratio and secure beamforming vectors, for maximizing the primary secrecy transmission rate while guaranteeing secondary transmission requirement. For solving the non-convex optimization problem, we transfer the problem into convex optimization form by adopting the semi-definite relaxation (SDR) method and Charnes-Cooper transformation technique. Then, the optimal secure beamforming vectors and energy harvesting duration can be obtain easily by utilizing the CVX tools. According to the simulation results of secrecy transmission rate, i.e., secrecy capacity, we can observe that the proposed protocol for the considered system model can effectively promote the primary secrecy transmission rate when compared with traditional zero-forcing (ZF) scheme, while ensuring the transmission rate of the secondary system.

Citation

Tang, K., Tang, W., Luo, E., Tan, Z., Meng, W., & Qi, L. (2020). Secure Information Transmissions in Wireless-powered Cognitive Radio Networks for Internet of Medical Things. Security and Communication Networks, 2020, Article 7542726. https://doi.org/10.1155/2020/7542726

• Journal Article Type: Article
• Acceptance Date: Dec 20, 2019
• Online Publication Date: Feb 24, 2020
• Publication Date: Feb 24, 2020
• Deposit Date: Dec 27, 2019
• Publicly Available Date: Jan 6, 2020
• Print ISSN: 1939-0114
• Electronic ISSN: 1939-0122
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 2020
• Article Number: 7542726
• DOI: https://doi.org/10.1155/2020/7542726
• Keywords: Internet of Medical Things (IoMT); secure transmissions; secrecy; medical information
• Public URL: http://researchrepository.napier.ac.uk/Output/2428113