Next Article in Journal
Tuning the Stiffness Balance Using Characteristic Frequencies as a Criterion for a Superconducting Gravity Gradiometer
Next Article in Special Issue
Performance Analysis of Diversity-Controlled Multi-User Superposition Transmission for 5G Wireless Networks
Previous Article in Journal
Mutual-Information-Based Incremental Relaying Communications for Wireless Biomedical Implant Systems
Article Menu

Export Article

Open AccessArticle
Sensors 2018, 18(2), 516; doi:10.3390/s18020516

Non-Orthogonal Multiple Access for Ubiquitous Wireless Sensor Networks

1
Department of Electrical and Electronic Engineering, Auckland University of Technology, Auckland 1010, New Zealand
2
School of Computing and Communications, Lancaster University, Lancaster LA1 4YW, UK
*
Author to whom correspondence should be addressed.
Received: 31 December 2017 / Revised: 3 February 2018 / Accepted: 7 February 2018 / Published: 8 February 2018
(This article belongs to the Special Issue Non-Orthogonal Multi-User Transmissions for 5G Networks)
View Full-Text   |   Download PDF [2447 KB, uploaded 11 February 2018]   |  

Abstract

Ubiquitous wireless sensor networks (UWSNs) have become a critical technology for enabling smart cities and other ubiquitous monitoring applications. Their deployment, however, can be seriously hampered by the spectrum available to the sheer number of sensors for communication. To support the communication needs of UWSNs without requiring more spectrum resources, the power-domain non-orthogonal multiple access (NOMA) technique originally proposed for 5th Generation (5G) cellular networks is investigated for UWSNs for the first time in this paper. However, unlike 5G networks that operate in the licensed spectrum, UWSNs mostly operate in unlicensed spectrum where sensors also experience cross-technology interferences from other devices sharing the same spectrum. In this paper, we model the interferences from various sources at the sensors using stochastic geometry framework. To evaluate the performance, we derive a theorem and present new closed form expression for the outage probability of the sensors in a downlink scenario under interference limited environment. In addition, diversity analysis for the ordered NOMA users is performed. Based on the derived outage probability, we evaluate the average link throughput and energy consumption efficiency of NOMA against conventional orthogonal multiple access (OMA) technique in UWSNs. Further, the required computational complexity for the NOMA users is presented. View Full-Text
Keywords: cross-technology interference; non-orthogonal multiple access; stochastic geometry; unlicensed spectrum; ubiquitous wireless sensor networks cross-technology interference; non-orthogonal multiple access; stochastic geometry; unlicensed spectrum; ubiquitous wireless sensor networks
Figures

Figure 1

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. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Anwar, A.; Seet, B.-C.; Ding, Z. Non-Orthogonal Multiple Access for Ubiquitous Wireless Sensor Networks. Sensors 2018, 18, 516.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top