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Outage Performance Analysis of Energy Harvesting Wireless Sensor Networks for NOMA Transmissions
Khon Kaen Univ, Thailand..
Duy Tan Univ, Viet Nam..
Khon Kaen Univ, Thailand..ORCID iD: 0000-0003-1026-191X
Mälardalen University, School of Innovation, Design and Engineering, Embedded Systems.
2020 (English)In: Mobile Networks and Applications , ISSN 1383-469X, E-ISSN 1572-8153, Vol. 25, no 1, p. 23-41Article in journal (Refereed) Published
Abstract [en]

In this paper, we investigate radio frequency (RF) energy harvesting (EH) in wireless sensor networks (WSNs) using non-orthogonal multiple access (NOMA) uplink transmission with regard to a probable secrecy outage during the transmission between sensor nodes (SNs) and base station (BS) in the presence of eavesdroppers (EAVs). In particular, the communication protocol is divided into two phases: 1) first, the SNs harvest energy from multiple power transfer stations (PTSs), and then, 2) the cluster heads are elected to transmit information to the BS using the harvested energy. In the first phase, we derive a 2D RF energy model to harvest energy for the SNs. During the second phase, the communication faces multiple EAVs who attempt to capture the information of legitimate users; thus, we propose a strategy to select cluster heads and implement the NOMA technique in the transmission of the cluster heads to enhance the secrecy performance. For the performance evaluation, the exact closed-form expressions for the secrecy outage probability (SOP) at the cluster heads are derived. A nearly optimal EH time algorithm for the cluster head is also proposed. In addition, the impacts of system parameters, such as the EH time, the EH efficiency coefficient, the distance between the cluster heads and the BS, and the number of SNs as well as EAVs on the SOP, are investigated. Finally, Monte Carlo simulations are performed to show the accuracy of the theoretical analysis; it is also shown that the secrecy performance of NOMA in RF EH WSN can be improved using the optimal EH time.

Place, publisher, year, edition, pages
SPRINGER , 2020. Vol. 25, no 1, p. 23-41
Keywords [en]
Energy harvesting, Wireless sensor networks, Non-orthogonal multiple access, Physical layer security
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:mdh:diva-47223DOI: 10.1007/s11036-018-1188-7ISI: 000513451700004OAI: oai:DiVA.org:mdh-47223DiVA, id: diva2:1412138
Available from: 2020-03-05 Created: 2020-03-05 Last updated: 2020-03-05Bibliographically approved

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Tran, Hung Vinh

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