11 research outputs found
Analysis of LoRaWAN Uplink with Multiple Demodulating Paths and Capture Effect
Low power wide area networks (LPWANs), such as the ones based on the LoRaWAN
protocol, are seen as enablers of large number of IoT applications and
services. In this work, we assess the scalability of LoRaWAN by analyzing the
frame success probability (FSP) of a LoRa frame while taking into account the
capture effect and the number of parallel demodulation paths of the receiving
gateway. We have based our model on the commonly used {SX1301 gateway chipset},
which is capable of demodulating {up to} eight frames simultaneously; however,
the results of the model can be generalized to architectures with arbitrary
number of demodulation paths. We have also introduced and investigated {three}
policies for Spreading Factor (SF) allocation. Each policy is evaluated in
terms of coverage {probability}, {FSP}, and {throughput}. The overall
conclusion is that the presence of multiple demodulation paths introduces a
significant change in the analysis and performance of the LoRa random access
schemes
LoRa-E: Overview and Performance Analysis
International audienceLong Range-Frequency Hopping Spread Spectrum(LR-FHSS) is the new physical layer designed to addressextremely long-range and large-scale communication scenarios,such as satellite IoT. At its core is a fast frequency hoppingtechnique designed to offer higher network capacity whileoffering the same radio link budget as LoRa. Additionally,LR-FHSS finely manages packet transmission thanks to its designprinciples, enabling QoS policies on a per-packet basis. Giventhe notorious adoption of LoRaWAN in the IoT applicationlandscape, this article is a reference for understanding howexactly LR-FHSS works, the performance it can offer, and itslimitations and research opportunities
Implementación de Lora y Lorawan como escenario futuro de la industrias 4.0 en el sector agroindustrial peruano
El panorama actual del sector agroindustrial exige la inclusión de nuevas tecnologÃas que contribuyan a solucionar los constantes problemas a los que se enfrenta. Internet of Things se presenta como una alternativa para mitigarlos; sin embargo, las implementaciones de esta tecnologÃa se realizan con el uso de redes de datos tradicionales como Wifi o redes celulares, las cuales representan un alto costo y consumo de energÃa. En esta investigación se realizó un análisis de la arquitectura y funcionamiento de la tecnologÃa LoRa y el protocolo LoRaWAN, además de plantearse una serie de recomendaciones de cómo implementarla conjuntamente con otras tecnologÃas emergentes como es el BlockChain, todo esto, aplicado a la agroindustria peruana
Development and Implementation of a Hybrid Wireless Sensor Network of Low Power and Long Range for Urban Environments
The urban population, worldwide, is growing exponentially and with it the demand
for information on pollution levels, vehicle traffic, or available parking, giving rise to citizens
connected to their environment. This article presents an experimental long range (LoRa) and low
power consumption network, with a combination of static and mobile wireless sensors (hybrid
architecture) to tune and validate concentrator placement, to obtain a large coverage in an urban
environment. A mobile node has been used, carrying a gateway and various sensors. The Activation
By Personalization (ABP) mode has been used, justified for urban applications requiring multicasting.
This allows to compare the coverage of each static gateway, being able to make practical decisions
about its location. With this methodology, it has been possible to provide service to the city of
Malaga, through a single concentrator node. The information acquired is synchronized in an external
database, to monitor the data in real time, being able to geolocate the dataframes through web
mapping services. This work presents the development and implementation of a hybrid wireless
sensor network of long range and low power, configured and tuned to achieve efficient performance
in a mid-size city, and tested in experiments in a real urban environment.Spanish project RTI2018-093421-B-I0
Analysis of Latency and MAC-layer Performance for Class A LoRaWAN
We propose analytical models that allow us to investigate the performance of
long range wide area network (LoRaWAN) uplink in terms of latency, collision
rate, and throughput under the constraints of the regulatory duty cycling, when
assuming exponential inter-arrival times. Our models take into account sub-band
selection and the case of sub-band combining. Our numerical evaluations
consider specifically the European ISM band, but the analysis is applicable to
any coherent band. Protocol simulations are used to validate the proposed
models. We find that sub-band selection and combining have a large effect on
the quality of service (QoS) experienced in an LoRaWAN cell for a given load.
The proposed models allow for the optimization of resource allocation within a
cell given a set of QoS requirements and a traffic model