Evaluating LoRa energy efficiency for adaptive networks: From star to mesh topologies

Ochoa, Moises Nuñez; Guizar, Arturo; Maman, Mickael; Duda, Andrzej

doi:10.1109/wimob.2017.8115793

Cited by 78 publications

(45 citation statements)

References 7 publications

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“…Ochoa et al [12] proposed various strategies to adapt LoRa radio parameters to different deployment scenarios. Their simulation results showed that in a star topology, we can achieve the optimal scaling-up/down strategy of LoRa radio parameters to obtain either a high data rate or a long range while respecting low energy consumption.…”

Section: Related Workmentioning

confidence: 99%

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Simulation of LoRa in NS-3: Improving LoRa Performance with CSMA

Duda

2018

2018 IEEE International Conference on Communications (ICC)

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111

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In this paper, we consider two research issues. First, we present a NS-3 module that simulates the behavior of LoRa in an accurate way. To validate the module, we compare its results with measurements on a real-world testbed and with measured values reported by other work. We also show that the module correctly represents the capture effect that lowers the packet drop rate due to collisions. Second, we want to improve the performance of LoRa devices while not impacting energy consumption, the aspect that usually is not taken into account in the literature. We use the simulator to evaluate CSMA (Carrier Sense Multiple Access), a simple enhancement to LoRaWAN that lowers the collision ratio. The simulation results show that CSMA considerably lowers the collision ratio while only slightly increasing energy consumption. We also observe that CSMA presents lower energy consumption than LoRa for a large number of devices. Another advantage of CSMA consists of increased throughput and larger network capacity because the ETSI restrictions on the duty cycle do not longer apply.

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Section: Related Workmentioning

confidence: 99%

“…This choice of the access method highly impacts the capacity of LoRa and its scalability to a large number of devices. Several authors studied these aspects [4], [5], [6], [7], [8], [9], [10], [11], [12]. The main conclusions to draw from the analyses are the following:…”

Section: Introductionmentioning

confidence: 99%

Simulation of LoRa in NS-3: Improving LoRa Performance with CSMA

Duda

2018

2018 IEEE International Conference on Communications (ICC)

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111

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“…Therefore, the data duplications by IEEE802.11p must be completed within several seconds while the vehicles are running. Further, the LPWA (low power, wide area) [12] has a longer transmission range because it consists of a lower frequency, such as 920 MHz, but the throughput is not enough for the transmission of multimedia data such as movies or pictures.…”

Section: Proposed Road Surveillance Systemmentioning

confidence: 99%

Vehicular Delay-Tolerant Networks with Image Recognition-Based Adaptive Array Antenna for Winter Road Surveillance in Local Areas

2019

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The rapid growth of the ITS (intelligent transport system) development requires us to realize new kinds of applications, such as the winter road surveillance system. However, it is still necessary to consider the network difficulty areas for LTE (long-term evolution) or 3G transmissions when one visits sightseeing spots such as ski resorts or spas in mountain areas. Therefore, this paper proposes a winter road surveillance system in the local area based on vehicular delay-tolerant networks. The adaptive array antenna controlled by image recognition with the Kalman filter algorithm is proposed as well to the system in order to realize higher delivery rates. The implementations of the prototype system are presented in this paper as well, and the effectivity of the radio transmission in the prototype system is realized by vehicular image recognition methods and the asynchronous voltage controls for antenna elements for the rapid directional controls of the radio transmission. The experimental results showed that the radio directional controls by the prototype system for the target vehicle can proceed within one second, and that the simulation with the GIS (geographic information system) map pointed out the delivery rates of the proposed method—which are better than those of the epidemic DTN (delay-tolerant networking) routing by the nondirectional antenna. The experiments of the proposed methods indicate a higher efficiency of the data transmissions—even in the mountain area. Furthermore, future research subjects are discussed in this paper.

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“…Table I for SF 12 and TP of 14 dBm to 1.3 km for SF6 and TP of 2 dBm [10]. We proposed optimal strategies for adapting the parameters from the point of view of energy efficiency [19]. For instance, we showed that the best SF and TP configuration to achieve minimal energy consumption (for BW of 125 kHz and CR of 4/5) consists of 1) increase TP from 2 dBm until reaching TP of 14 dBm with SF 6 and then 2) adapt SF until reaching SF 12 with TP of 14 dBm.…”

Section: Overview Of Loramentioning

confidence: 99%

WiSH-WalT: A Framework for Controllable and Reproducible LoRa Testbeds

Lone¹,

Duble²,

Rousseau³

et al. 2018

2018 IEEE 29th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

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In this paper, we describe the design and implementation of WiSH-WalT, a framework for controllable and reproducible LoRa testbeds. The implementation of the WiSHFUL unified interface provides the means for controlling and adapting the LoRa parameters to given conditions and low energy consumption by configuring transmission power, spreading factor, bandwidth, and error coding rate. WalT provides support for running reproducible experiments based on the deployment of docker images on a distributed set of nodes. Put together, the functionalities of WiSHFUL and WalT open new possibilities for deploying reproducible LoRa testbeds. We have used WiSH-WalT to experiment with adaptive configuration of the LoRa parameters and evaluated the communication performance of LoRa motes in a setup with several gateways.

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Evaluating LoRa energy efficiency for adaptive networks: From star to mesh topologies

Cited by 78 publications

References 7 publications

Simulation of LoRa in NS-3: Improving LoRa Performance with CSMA

Simulation of LoRa in NS-3: Improving LoRa Performance with CSMA

Vehicular Delay-Tolerant Networks with Image Recognition-Based Adaptive Array Antenna for Winter Road Surveillance in Local Areas

WiSH-WalT: A Framework for Controllable and Reproducible LoRa Testbeds

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