Exact outage performance of small-cell network relying device-to-device and non-orthogonal multiple access under perfect
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Exact outage performance of small-cell network relying device-todevice and non-orthogonal multiple access under perfect and imperfect CSI Huu-Phuc Dang1,2 • Van-Minh-Sang Nguyen3 • Dinh-Thuan Do4
•
Hong-Lien Pham1
Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract This paper investigates a non-orthogonal multiple access (NOMA) technique by employing device-to-device (D2D) transmission in small-cell networks. More specifically, the D2D transmission combines the relay selection model from a group of macro base stations (MBS) with the D2D mode in in small-cell network to form a D2D-NOMA system. Such D2D transmission needs assistance from multiple MBS and the small-cell base station (SBS) using decode-and-forward (DF) techniques. In this context, full-duplex (FD) is adopted at intermediate nodes. Furthermore, there are two possible scenarios in practice including perfect channel state information (CSI) and imperfect CSI that need to be studied to examine performance degradation in such considered network. To evaluate system performance, we derive expressions of outage probability for D2D user. Our study results show that the proposed network with more MBSs selection can improve the outage performance compared to the conventional orthogonal multiple access (OMA) scheme. Finally, numerical results confirms the accuracy of the derived expressions. Keywords Device-to-device Non-orthogonal multiple access Relay selection Imperfect CSI
1 Introduction
& Dinh-Thuan Do [email protected] Huu-Phuc Dang [email protected] Van-Minh-Sang Nguyen [email protected] Hong-Lien Pham [email protected] 1
Faculty of Electrical and Electronics Engineering, Ho Chi Minh City University of Technology and Education, Ho Chi Minh City, Vietnam
2
Electrical - Electronics Department, School of Engineering and Technology, Tra Vinh University, Tra Vinh, Vietnam
3
Industrial University of Ho Chi Minh City (IUH), Ho Chi Minh City, Vietnam
4
Wireless Communications Research Group, Faculty of Electrical & Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam
Due to the explosion of the increasing number of mobile devices along with communication services, it is required to explore emerging networks. Such techniques benefit the increasing number of mobile devices along with multimedia applications such as mobile gaming, video conference. They have triggered rapid advances in wireless communications in terms of networking technologies and services. An increase in demand for higher data rates and Quality of Service (QoS) provisioning is necessary and these developments further require the demand for data access anytime, anywhere from any device. In recent years, a popular trend can be raised that user possesses many devices to connect to the Internet, through both cellular networks and various kinds of wireless networks. There would be a 500-fold increase in wireless cellular data traffic, such estimated period bet
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