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How to Implement Wireless projects in OMNeT++

To implement wireless projects in OMNeT++ has embrace to setup an emulation that describes the network and node modules then execute the wireless communication protocols and deploy the simulation scenarios. Here, we provide the brief procedures to implement the basic wireless communication simulation in OMNeT++ using the INET framework.

Step-by-Step Implementation:

Step 1: Install OMNeT++ and INET Framework

  1. Download OMNeT++:
    • Download the OMNeT++ latest version.
  2. Install OMNeT++:
  • Based on the operating system install the OMNet++.
  1. Download and Install INET Framework:
    • The INET framework delivers models for internet protocols and is often used with OMNeT++.

Step 2: Set Up Your Project

  1. Create a New OMNeT++ Project:
    • Open the OMNeT++ IDE.
    • Go to File -> New -> OMNeT++ Project.
    • Enter a project name and select the appropriate options.
  2. Set Up Directory Structure:
    • Make sure the projects have the essential folders like src for source files and simulations for NED files and configuration.

Step 3: Define Wireless Network Models Using NED

  1. Create NED Files:
    • In the src directory, make a new NED file (e.g., WirelessNetwork.ned).
    • Describe the network topology in the NED file. Here’s a simple example:

package wireless;

import inet.node.inet.StandardHost;

import inet.node.inet.Router;

import inet.networklayer.configurator.ipv4.Ipv4NetworkConfigurator;

import inet.physicallayer.common.packetlevel.RadioMedium;

import inet.mobility.single.RandomWaypointMobility;

network WirelessNetwork

{

parameters:

int numHosts = default(5);

types:

channel radioChannel extends RadioMedium {}

submodules:

configurator: Ipv4NetworkConfigurator {

@display(“p=100,100”);

}

accessPoint: Router {

@display(“p=200,100”);

}

host[numHosts]: StandardHost {

@display(“p=300+100*i,200”);

mobility.typename = “RandomWaypointMobility”;

}

radioMedium: radioChannel {

@display(“p=400,100”);

}

connections allowunconnected:

for i=0..numHosts-1 {

host[i].wlan[0] <–> radioMedium <–> accessPoint.wlan[0];

}

}

Step 4: Implement Wireless Communication Logic in C++

  1. Create C++ Modules:
    • In the src directory, create a new C++ class (e.g., WirelessApp.cc).
    • Include necessary OMNeT++ headers and define your module:

#include <omnetpp.h>

#include “inet/applications/base/ApplicationBase.h”

#include “inet/applications/udpapp/UdpBasicApp.h”

#include “inet/networklayer/common/L3AddressResolver.h”

#include “inet/networklayer/contract/ipv4/Ipv4Address.h”

#include “inet/networklayer/contract/IL3AddressType.h”

using namespace omnetpp;

using namespace inet;

class WirelessApp : public ApplicationBase

{

protected:

virtual void initialize(int stage) override;

virtual void handleMessageWhenUp(cMessage *msg) override;

void sendPacket();

void handlePacket(cPacket *pkt);

};

Define_Module(WirelessApp);

void WirelessApp::initialize(int stage)

{

ApplicationBase::initialize(stage);

if (stage == INITSTAGE_LOCAL) {

// Initialization code

if (par(“sendPackets”).boolValue()) {

scheduleAt(simTime() + par(“startDelay”), new cMessage(“sendPacket”));

}

}

}

void WirelessApp::handleMessageWhenUp(cMessage *msg)

{

if (msg->isSelfMessage()) {

if (strcmp(msg->getName(), “sendPacket”) == 0) {

sendPacket();

scheduleAt(simTime() + par(“sendInterval”), msg);

}

} else {

cPacket *pkt = check_and_cast<cPacket *>(msg);

handlePacket(pkt);

}

}

void WirelessApp::sendPacket()

{

// Create and send a packet

EV << “Sending packet” << endl;

cPacket *pkt = new cPacket(“WirelessPacket”);

pkt->setByteLength(par(“packetSize”));

send(pkt, “lowerLayerOut”);

}

void WirelessApp::handlePacket(cPacket *pkt)

{

// Handle received packet

EV << “Received packet: ” << pkt->getName() << endl;

delete pkt;

}

  1. Modify NED to Use C++ Modules:
    • Modernize the NED file to use custom application module:

network WirelessNetwork

{

parameters:

int numHosts = default(5);

types:

channel radioChannel extends RadioMedium {}

submodules:

configurator: Ipv4NetworkConfigurator {

@display(“p=100,100”);

}

accessPoint: Router {

@display(“p=200,100”);

}

host[numHosts]: StandardHost {

@display(“p=300+100*i,200”);

mobility.typename = “RandomWaypointMobility”;

@children:

udpApp: WirelessApp {

localPort = 12345;

destPort = 54321;

startTime = uniform(0, 1s);

packetSize = 512B;

sendInterval = exponential(1s);

}

}

radioMedium: radioChannel {

@display(“p=400,100”);

}

connections allowunconnected:

for i=0..numHosts-1 {

host[i].wlan[0] <–> radioMedium <–> accessPoint.wlan[0];

}

}

Step 5: Configure Simulation Parameters

  1. Create omnetpp.ini:
    • In the simulations directory, create an omnetpp.ini file.
    • Outline simulation parameters, like the duration and network parameters:

network = WirelessNetwork

sim-time-limit = 100s

**.sendPackets = true

**.startDelay = 1s

**.sendInterval = 2s

**.packetSize = 512B

**.host[*].mobility.typename = “inet.mobility.single.RandomWaypointMobility”

Step 6: Build and Run the Simulation

  1. Build the Project:
    • In the OMNeT++ IDE, right-click on your project and select Build Project.
  2. Run the Simulation:
    • Go to Run -> Run Configurations.
    • Set up a new run configuration for your project and run the simulation.

Step 7: Analyse Results

  1. View Simulation Results:
    • After the simulation completes, use OMNeT++’s tools to measure the results.
    • Open the ANF (Analysis Framework) to visualize and interpret the data.

We had understand how to deploy the wireless project in OMNet++ simulator that has generate the network module then implement the communication protocol then deploy in the network. Get comparison analysis along with simulation support from us we give you novel project ideas.

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