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How to Calculate Network Spectral Bandwidth in omnet++

To calculate the network spectral bandwidth in OMNeT++ has needs to determine the range of frequencies over which a network transfers its signals. Spectral bandwidth is a significant performance metrics in wireless communications as it impacts the data rate, interference, and overall performance of the network. The given below are the detailed procedures on how to implement the network spectral bandwidth in OMNeT++:

Steps to Calculate Network Spectral Bandwidth in OMNeT++:

  1. Set Up the Wireless Network Model:
    • Describe wireless network topology using NED files in OMNeT++ that contains nodes like access points, base stations, or mobile devices, and configure the wireless channel model.
  2. Configure the Frequency and Bandwidth Parameters:
    • In OMNeT++, specifically when using the INET framework, wireless communication modules such as Ieee80211Radio or Ieee80211ScalarRadioMedium is commonly concludes the metrics for carrier frequency and bandwidth and these metrics describe the central frequency and the range of frequencies used for transmission.
  3. Access the Spectral Bandwidth:
    • The spectral bandwidth is usually a fixed parameter set in the radio or channel module configuration and it signifies the width of the frequency band used for communication. If the bandwidth is dynamic or needs to be computed based on other parameters, we need to execute additional logic.
  4. Log or Analyse Spectral Bandwidth:
    • During the simulation, we can log the spectral bandwidth to evaluate its effects on network performance. If the bandwidth is not directly provided, we need to calculate it based on the configured parameters.

Example Implementation: Accessing and Logging Spectral Bandwidth

The below is the sample of how to access and log the spectral bandwidth in OMNeT++ using the INET framework:

#include <omnetpp.h>

#include “inet/physicallayer/contract/packetlevel/IRadio.h”

#include “inet/physicallayer/contract/packetlevel/IRadioMedium.h”

using namespace omnetpp;

using namespace inet;

using namespace inet::physicallayer;

class SpectralBandwidthModule : public cSimpleModule {

private:

IRadio *radio;                      // Pointer to the radio module

simsignal_t bandwidthSignal;        // Signal to record spectral bandwidth

protected:

virtual void initialize() override {

// Find the radio module within the network node

radio = check_and_cast<IRadio *>(getParentModule()->getSubmodule(“radio”));

// Register the spectral bandwidth signal

bandwidthSignal = registerSignal(“bandwidthSignal”);

// Log the initial spectral bandwidth

double bandwidth = radio->getBandwidth().get();  // Get bandwidth in Hz

emit(bandwidthSignal, bandwidth);

EV << “Spectral Bandwidth: ” << bandwidth / 1e6 << ” MHz\n”;

}

virtual void handleMessage(cMessage *msg) override {

// This module is not handling messages in this example

delete msg;

}

};

Define_Module(SpectralBandwidthModule);

Explanation:

  • SpectralBandwidthModule:
    • radio: A pointer to the radio module responsible for managing the signal transmission and reception.
    • bandwidthSignal: Registers a signal to release the spectral bandwidth for logging or analysis.
  • initialize() Function:
    • Locates the radio module and accesses the spectral bandwidth using radio->getBandwidth(). This bandwidth value is usually configured in the radio’s INI file or NED file.
    • The bandwidth is then produced as a signal and logged for analysis.
  • handleMessage() Function:
    • In this sample, the module does not process messages after initialization; but, we could extend this to dynamically monitor changes in bandwidth if needed.
  1. Run the Simulation:
  • Compile and run OMNeT++ project. The simulation will log the spectral bandwidth at initialization, which need to measure for insights into how it impacts the network performance.
  1. Analyse and Interpret Results:
  • The spectral bandwidth gives you a measure of the frequency range used by the network and this bandwidth directly affect the channel capacity, interference, and overall data rate.

Additional Considerations:

  • Dynamic Bandwidth: If the network dynamically distributes bandwidth based on traffic conditions or other factors, we need to execute additional logic to track and compute the efficiency of bandwidth during the simulation.
  • Channel Models: The choice of channel model in OMNeT++ can disturb how bandwidth is used and interpreted. Make sure the model accurately reflects the scenario are simulating.
  • Bandwidth and Interference: Wider bandwidths can support higher data rates but also lead to enlarged interference with other transmissions. Consider this exchange of data when measuring the simulation outcomes.

In the given above steps are the concepts on how to calculate the network spectral bandwidth in OMNeT++ simulator tool that computes the range of frequencies over the transmitted signals.

Omnet-manual.com offer simulation results for Network Spectral Bandwidth using the omnet++ tool. If you need a tailored research experience, contact us. Our skilled team and advanced tools are here to help with your research. Get support for performance metrics in wireless communications for your project from us.

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