On Exact Outage and Throughput Performance of Cognitive Radio based Non-Orthogonal Multiple Access Networks With and Without D2D Link
1
Wireless Communications Research Group, Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam
2
Faculty of Electronics Technology, Industrial University of Ho Chi Minh City (IUH), Ho Chi Minh City 700000, Vietnam
3
School of Intelligent Mechatronics Engineering, Sejong University, Seoul 05006, Korea
*
Authors to whom correspondence should be addressed.
Sensors 2019, 19(15), 3314; https://doi.org/10.3390/s19153314
Received: 18 June 2019
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Revised: 23 July 2019
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Accepted: 25 July 2019
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Published: 28 July 2019
(This article belongs to the Section Sensor Networks)
In this paper, we investigate the performance of a secondary network in a cognitive radio network employing a non-orthogonal multiple access (NOMA) scheme to form a CR-NOMA system serving many destination users. In the secondary network of our proposed system, a device-to-device (D2D) scheme is deployed to further provide the signal transmission at a close distance of NOMA users in downlink, and such performance is evaluated under the situation of interference reception from the primary network. An outage performance gap exists among these NOMA users since different power allocation factors are assigned to the different destinations. Unlike existing NOMA schemes that consider fixed power allocation factors, which are not optimal in terms of outage performance, our proposed paradigm exhibits optimal outage in the scenario of D2D transmission. In particular, the outage performances in two kinds of schemes in term of existence of D2D link are further achieved. Simulation results validate the analytical expressions, and show the advantage of each scheme in the proposed CR-NOMA system based on outage performance and throughput.
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Keywords:
non-orthogonal multiple access (NOMA); cognitive radio; device-to-device; outage probability
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MDPI and ACS Style
Do, D.-T.; Le, A.-T.; Le, C.-B.; Lee, B.M. On Exact Outage and Throughput Performance of Cognitive Radio based Non-Orthogonal Multiple Access Networks With and Without D2D Link. Sensors 2019, 19, 3314. https://doi.org/10.3390/s19153314
AMA Style
Do D-T, Le A-T, Le C-B, Lee BM. On Exact Outage and Throughput Performance of Cognitive Radio based Non-Orthogonal Multiple Access Networks With and Without D2D Link. Sensors. 2019; 19(15):3314. https://doi.org/10.3390/s19153314
Chicago/Turabian StyleDo, Dinh-Thuan, Anh-Tu Le, Chi-Bao Le, and Byung M. Lee. 2019. "On Exact Outage and Throughput Performance of Cognitive Radio based Non-Orthogonal Multiple Access Networks With and Without D2D Link" Sensors 19, no. 15: 3314. https://doi.org/10.3390/s19153314
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