Paper Info
Title
Collision-Free Transmissions in an IoT Monitoring Application Based on LoRaWAN.
Abstract
With the Internet of Things (IoT), the number of monitoring applications deployed is considerably increasing, whatever the field considered: smart city, smart agriculture, environment monitoring, air pollution monitoring, to name a few. The LoRaWAN (Long Range Wide Area Network)architecture with its long range communication, its robustness to interference and its reduced energy consumption is an excellent candidate to support such applications. However, if the number of end devices is high, the reliability of LoRaWAN, measured by the Packet Delivery Ratio (PDR), becomes unacceptable due to an excessive number of collisions. In this paper, we propose two different families of solutions ensuring collision-free transmissions. The first family is TDMA (Time-Division Multiple Access)-based. All clusters transmit in sequence and up to six end devices with different spreading factors belonging to the same cluster are allowed to transmit in parallel. The second family is FDMA (Frequency Divsion Multiple Access)-based. All clusters transmit in parallel, each cluster on its own frequency. Within each cluster, all end devices transmit in sequence. Their performance are compared in terms of PDR, energy consumption by end device and maximum number of end devices supported. Simulation results corroborate the theoretical results and show the high efficiency of the solutions proposed.
Year
DOI
Venue
2020
10.3390/s20144053
SENSORS
Keywords
DocType
Volume
IoT,LPWAN,LoRaWAN,monitoring application,reliability,scalability,collision-free,TDMA,FDMA,air pollution monitoring
Journal
20
Issue
ISSN
Citations 
14
1424-8220
0
PageRank 
References 
Authors
0.34
0
4
Name
Order
Citations
PageRank
Rahim Haiahem100.68
Pascale Minet275992.50
Selma Boumerdassi314122.38
Leïla Azouz Saïdane414137.35