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Related Concept Videos

RL Circuits01:14

RL Circuits

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An RL circuit consists of a resistor and an inductor and may have a source of emf connected to it. The inductor in the circuit helps to prevent rapid changes in current, which can be helpful if a steady current is required but the external source has a fluctuating emf. Consider an open RL circuit connected to a source of constant emf. As soon as the circuit is closed, the current begins to increase at a rate that depends only on the value of the inductance in the circuit. The greater the...
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An RC circuit consists of resistance and capacitance, while in an RL circuit, capacitance is replaced by an inductor. RL and RC circuits are first-order differential circuits that store energy. An RC circuit stores energy in the electric field, while an RL circuit stores energy in the magnetic field. When connected to a battery, an RC circuit charges the capacitor, causing the current to decrease from maximum to zero upon being fully charged. This increases the voltage across the capacitor from...
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Pilot relaying is a type of differential protection used in power systems. It compares electrical quantities at the terminals of equipment via a communication channel instead of direct relay interconnection. This method is essential for transmission lines where the terminals are far apart, typically up to 80 km for lines with 69 to 115 kV ratings. Four types of communication channels are used for pilot relaying:
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LC Circuits01:21

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An LC circuit consists of an inductor and a capacitor, either in series or parallel. Consider a charged capacitor connected with an inductor in series. Before the switch is closed, all the energy of the circuit is stored in the electric field of the capacitor. When the switch is closed, the capacitor begins to discharge, producing a current in the circuit. The current, in turn, creates a magnetic field in the inductor. Because of the induced emf in the inductor, the current cannot change...
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LoRaWANSim: A Flexible Simulator for LoRaWAN Networks.

Riccardo Marini1, Konstantin Mikhaylov2, Gianni Pasolini1

  • 1Wilab, CNIT and DEI Department, University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy.

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|January 27, 2021
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Summary

LoRaWANSim, a new MATLAB simulator, accurately models LoRaWAN networks by considering physical, MAC, and network layers. This tool reveals non-intuitive performance trade-offs in large-scale Internet of Things deployments.

Keywords:
LPWANLoRaLoRaWANMATLABanalysisinternet of thingsmodelnetwork simulatorperformancesimulation

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Area of Science:

  • Computer Science
  • Electrical Engineering
  • Telecommunications

Background:

  • Low Power Wide Area Network (LPWAN) protocols are crucial for large-scale Internet of Things (IoT) deployments.
  • LoRaWAN is a prominent LPWAN technology, valued for its flexibility and energy efficiency.
  • Accurate performance assessment of LoRaWAN requires sophisticated network simulation tools beyond analytical methods.

Purpose of the Study:

  • To introduce LoRaWANSim, a comprehensive MATLAB-based simulator for LoRaWAN networks.
  • To provide an accurate characterization of LoRaWAN behavior across physical, MAC, and network layers.
  • To facilitate the study of LoRaWAN performance limits and parameter trade-offs in diverse application scenarios.

Main Methods:

  • Development of LoRaWANSim in MATLAB, focusing on a complete and accurate representation of the LoRaWAN protocol stack.
  • Inclusion of physical, medium access control (MAC), and network layer aspects for realistic network behavior simulation.
  • Validation of the simulator's accuracy and performance through comparative analysis.

Main Results:

  • LoRaWANSim accurately models LoRaWAN networks, offering a more complete representation than existing simplified simulators.
  • The simulator's application revealed notable and non-intuitive trade-offs in LoRaWAN performance.
  • Validation confirms the simulator's reliability for characterizing LoRaWAN network behavior.

Conclusions:

  • LoRaWANSim is a valuable, open-access tool for researchers studying LoRaWAN performance.
  • The simulator enables a deeper understanding of LoRaWAN capabilities and limitations for IoT applications.
  • Accurate simulation is essential for optimizing LoRaWAN parameter configurations and deployment strategies.