How to Implement D2D Communication in OMNeT++

To implement the Device-to-Device (D2D) communication in OMNeT++ contains generating a simulation atmosphere that contains mobile devices accomplished of direct communication lacking involving a base station or entrée point. The INET framework can be protracted to provision D2D communication functionalities. A step-by-step guide to help to get happening with a basic D2D communication simulation in OMNeT++ by using the INET framework is given below.

Step-by-Step Implementation:

Step 1: Install OMNeT++ and INET Framework

1. Download OMNeT++:
   • In the latest version to move on the OMNeT++ download.
2. Install OMNeT++:
   • For the operating system we survey the installation instructions provided on this website.
3. Download and Install INET Framework:
   • By using OMNeT++ for internet protocols provided by the INET framework. From the INET website could install it.

Step 2: Set Up Your Project

1. Create a New OMNeT++ Project:
   • Exposed the OMNeT++ IDE.
   • Attend File -> New -> OMNeT++ Project.
   • Go in the  project name and choice the proper options.
2. Set Up Directory Structure:
   • Ensure your project has the necessary folders, such as src for source files and simulations for NED files and configuration.
3. Add INET to Your Project:
   • To click on the project in the Project Explorer.
   • Hand-picked Properties -> Project References.
   • Patterned the box for INET.

Step 3: Define D2D Network Models Using NED

1. Create NED Files:
   • In the src directory, to make a new NED file like D2DNetwork.ned.

• Express the network topology in the NED file. Given below is the sample examples:

package d2d;

import inet.node.inet.StandardHost;

import inet.physicallayer.common.packetlevel.RadioMedium;

import inet.mobility.single.RandomWaypointMobility;

network D2DNetwork

{

parameters:

int numDevices = default(10);

types:

channel radioChannel extends RadioMedium {}

submodules:

radioMedium: radioChannel {

@display(“p=100,100”);

}

device[numDevices]: StandardHost {

@display(“p=200+100*i,200”);

mobility.typename = “RandomWaypointMobility”;

}

connections allowunconnected:

for i=0..numDevices-1 {

device[i].wlan[0] <–> radioMedium <–> device[(i+1) % numDevices].wlan[0];

}

}

Step 4: Implement D2D Communication Logic

1. Create C++ Modules for D2D Communication:
   • In the src directory, make new C++ classes such as D2DTransmitter.cc and D2DReceiver.cc).
   • Contain required OMNeT++ headers and express your D2D communication logic.
2. D2D Transmitter Implementation:

#include <omnetpp.h>

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

#include “inet/common/packet/Packet.h”

using namespace omnetpp;

using namespace inet;

class D2DTransmitter : public ApplicationBase

{

protected:

virtual void initialize(int stage) override;

virtual void handleMessageWhenUp(cMessage *msg) override;

void sendD2DMessage();

void handleD2DMessage(cPacket *pkt);

cMessage *sendEvent = nullptr;

};

Define_Module(D2DTransmitter);

void D2DTransmitter::initialize(int stage)

{

ApplicationBase::initialize(stage);

if (stage == INITSTAGE_LOCAL) {

sendEvent = new cMessage(“sendD2DMessage”);

scheduleAt(simTime() + par(“startTime”), sendEvent);

}

}

void D2DTransmitter::handleMessageWhenUp(cMessage *msg)

{

if (msg == sendEvent) {

sendD2DMessage();

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

}

else

{

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

handleD2DMessage(pkt);

}

}

void D2DTransmitter::sendD2DMessage()

{

// Create and send a D2D message to another device

EV << “Sending D2D message” << endl;

Packet *pkt = new Packet(“D2DMessage”);

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

send(pkt, “lowerLayerOut”);

}

void D2DTransmitter::handleD2DMessage(cPacket *pkt)

{

// Handle received D2D message

EV << “Received D2D message: ” << pkt->getName() << endl;

delete pkt;

}

1. D2D Receiver Implementation:

#include <omnetpp.h>

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

#include “inet/common/packet/Packet.h”

using namespace omnetpp;

using namespace inet;

class D2DReceiver : public ApplicationBase

{

protected:

virtual void initialize(int stage) override;

virtual void handleMessageWhenUp(cMessage *msg) override;

void handleD2DMessage(cPacket *pkt);

};

Define_Module(D2DReceiver);

void D2DReceiver::initialize(int stage)

{

ApplicationBase::initialize(stage);

}

void D2DReceiver::handleMessageWhenUp(cMessage *msg)

{

if (msg->isSelfMessage()) {

delete msg;

} else {

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

handleD2DMessage(pkt);

}

}

void D2DReceiver::handleD2DMessage(cPacket *pkt)

{

// Handle received D2D message

EV << “Received D2D message: ” << pkt->getName() << endl;

delete pkt;

}

Step 5: Integrate D2D Modules into Network Model

1. Modify NED File to Use D2D Modules:
   • Inform your NED file to procedure the custom D2D transmitter and receiver modules:

package d2d;

import inet.node.inet.StandardHost;

import inet.physicallayer.contract.packetlevel.IRadioMedium;

import inet.physicallayer.common.packetlevel.RadioMedium;

import inet.mobility.single.RandomWaypointMobility;

network D2DNetwork

{

parameters:

int numDevices = default(10);

submodules:

radioMedium: RadioMedium {

@display(“p=100,100”);

}

device[numDevices]: StandardHost {

@display(“p=200+100*i,200”);

mobility.typename = “RandomWaypointMobility”;

@children:

wlan[0].radio.transmitter.typename = “D2DTransmitter”;

wlan[0].radio.receiver.typename = “D2DReceiver”;

}

connections allowunconnected:

for i=0..numDevices-1 {

device[i].wlan[0] <–> radioMedium <–> device[(i+1) % numDevices].wlan[0];

}

}

Step 6: Configure Simulation Parameters

1. Create omnetpp.ini:
   • In the reproductions directory, produce an omnetpp.ini file.
   • Express simulation parameters, like the duration and network parameters:

[General]

network = D2DNetwork

sim-time-limit = 100s

# Mobility

**.device[*].mobility.speed = uniform(1mps, 10mps)

# D2D application parameters

**.device[*].udpApp.startTime = uniform(0s, 10s)

**.device[*].udpApp.sendInterval = exponential(1s)

**.device[*].udpApp.messageSize = 256B

**.device[*].udpApp.localPort = 1000

**.device[*].udpApp.destPort = 2000

Step 7: Build and Run the Simulation

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

Step 8: Analyze Results

1. View Simulation Results:
   • After the simulation completes, by using OMNeT++’s tools to evaluate the outcomes.
   • Exposed the ANF (Analysis Framework) to envision and understand the data.

From the script, we focus on how to improve the D2D Communication and how to create operation file by using D2D communication that were implemented using OMNeT++ tool. We will plan to offer the details about the D2D Communication.

For optimal simulation and project execution in D2D Communication using OMNeT++ Reach out to us, delivered by leading developers for your initiatives. We utilize the INET framework for D2D communication to enhance your project and offer innovative solutions.