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Wireless Communications and Mobile Computing
Volume 2017 (2017), Article ID 2019404, 15 pages
https://doi.org/10.1155/2017/2019404
Research Article

Outage Probability Analysis in Power-Beacon Assisted Energy Harvesting Cognitive Relay Wireless Networks

Institute of Research and Development, Duy Tan University, Da Nang, Vietnam

Correspondence should be addressed to Ngoc Phuc Le; moc.oohay@18nlcuhp

Received 7 July 2017; Accepted 8 August 2017; Published 24 September 2017

Academic Editor: Nathalie Mitton

Copyright © 2017 Ngoc Phuc Le. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We study the performance of the secondary relay system in a power-beacon (PB) assisted energy harvesting cognitive relay wireless network. In our system model, a secondary source node and a relay node first harvest energy from distributed PBs. Then, the source node transmits its data to the destination node with the help of the relay node. Also, fading coefficients of the links from the PBs to the source node and relay node are assumed independent but not necessarily identically distributed (i.n.i.d) Nakagami- random variables. We derive exact expressions for the power outage probability and the channel outage probability. Based on that, we analyze the total outage probability of the secondary relay system. Asymptotic analysis is also performed, which provides insights into the system behavior. Moreover, we evaluate impacts of the primary network on the performance of the secondary network with respect to the tolerant interference threshold at the primary receiver as well as the interference introduced by the primary transmitter at the secondary source and relay nodes. Simulation results are provided to validate the analysis.