Impact of foliage on LoRa 433MHz propagation in tropical environment

Ahmad, Khairol Amali Bin; Salleh, Mohd Sharil; Segaran, Jivitraa Devi; Hashim, Fakroul Ridzuan

doi:10.1063/1.5022903

Cited by 23 publications

(12 citation statements)

References 17 publications

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“…Studies of LoRa technology performance and coverage evaluation in forested areas have employed various measurements for field testing [8][9][10][11][12][13]. Lova et al [8] performed experiments in mountain and urban environments using the European ISM band (868 MHz).…”

Section: Introductionmentioning

confidence: 99%

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Performance Evaluation of LoRa 920 MHz Frequency Band in a Hilly Forested Area

et al. 2021

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Long-range (LoRa) wireless communication technology has been widely used in many Internet-of-Things (IoT) applications in industry and academia. Radio wave propagation characteristics in forested areas are important to ensure communication quality in forest IoT applications. In this study, 920 MHz band propagation characteristics in forested areas and tree canopy openness were investigated in the Takakuma experimental forest in Kagoshima, Japan. The aim was to evaluate the performance of the LoRa 920 MHz band with spreading factor (SF12) in a forested hilly area. The received signal strength indicator (RSSI) was measured as a function of the distance between the transmitter antenna and ground station (GS). To illustrate the effect of canopy openness on radio wave propagation, sky view factor (SVF) and a forest canopy height model were considered at each location of a successfully received RSSI. A positive correlation was found between the RSSI and SVF. It was found that between the GS and transmitter antenna, if the canopy height is above 23 m, the signal diffracted and RSSI fell to −120 to −127 dBm, so the presence of the obstacle height should be considered. Further research is needed to clarify the detailed tree density between the transmitter and ground station to propose an optimal propagation model for a forested environment.

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Section: Introductionmentioning

confidence: 99%

“…It has been reported that the signal decreased because of temperature variation and the existence of hills and vegetation. Khairol et al [9] carried out experiments using a Malaysian ISM band (433 MHz) in a tropical environment. The results evaluated the RSSI value measurement and comparison of the spreading factor (SF) of 7 and 12 MHz.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of LoRa 920 MHz Frequency Band in a Hilly Forested Area

et al. 2021

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“…The authors showed the coverage capabilities of four different technologies but did not compare the evaluated path‐loss models with measured data. The evaluation of vegetation impact on LoRa [21] in a rubber plantation is similar to this study. However, Ahmad et al reported on the received signal for the communication range as a preliminary result of their research with no further data analysis.…”

Section: Related Workmentioning

confidence: 78%

Characterising foliage influence on LoRaWAN pathloss in a tropical vegetative environment

Ansah

Sowah

Melià-Seguí

et al. 2020

IET wirel. sens. syst.

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“…Es posible presenciar la ruptura total del enlace de comunicación debido a factores externos. Se necesita mucha más investigación, especialmente para el trabajo empírico específico del sitio y aquellos que limitan la aplicación práctica del trabajo de investigación existente, como se describe en [20] el cual se orienta a la trasmisión en áreas de entorno forestal.…”

Section: Lora Ieee 802154unclassified

Desempeño RSSI de nodos sensores LoRa, BLE y WiFi en un sistema IoT interoperable

Salcedo-Parra¹,

Agudelo-Cristancho

2021

Aibi revista investig. adm. ing.

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En este artículo se muestra el proceso de diseño e implementación de un sistema de interoperabilidad para IoT Internet de las Cosas. Integra en un procesador, sistema embebido Raspberry Pi3 la interconexión con los estándares IEEE 802.15.4 - LoRa, IEEE 802.15.1 - Bluetooth LE (BLE)IEEE 802.11.a, b, g - Wifi. Este conjunto de estándares corresponde a los más utilizados en sistemas IoT. El sistema embebido se configura como un dispositivo IoT hub en la plataforma Azure, maneja una arquitectura modelo vista controlador, el sistema de almacenamiento y visualización es de tipo web. Se visualiza la respuesta de la variable de cada nodo sensor bajo el concepto de tiempo real, junto con la ubicación y el indicador de intensidad de señal recibida (RSSI). Se muestran los resultados de las pruebas de cobertura en ambientes externos e internos. El alcance máximo es de 313 metros en la interoperabilidad LoRa y LTE, BLE 22 metros, WiFi 44 metros. El perímetro de cobertura máxima es de 979 metros BLE 70 metros WiFi 136 metros

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Impact of foliage on LoRa 433MHz propagation in tropical environment

Cited by 23 publications

References 17 publications

Performance Evaluation of LoRa 920 MHz Frequency Band in a Hilly Forested Area

Performance Evaluation of LoRa 920 MHz Frequency Band in a Hilly Forested Area

Characterising foliage influence on LoRaWAN pathloss in a tropical vegetative environment

Desempeño RSSI de nodos sensores LoRa, BLE y WiFi en un sistema IoT interoperable

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