How to Implement Wireless Body Area Network in OMNeT++
To implement the wireless body area network (WBAN) in OMNeT++ has includes to generate an emulation scenario that embrace the sensors, a central coordinator (or sink node), and communication protocols appropriate for low-power, short-range communication. We need to use the INET framework to design the network components. We offer the procedures to start the basic implementation for WBAN in OMNeT++ using the INET framework.
Step-by-Step Implementation:
Step 1: Install OMNeT++ and INET Framework
- Download OMNeT++:
- Download the OMNeT++ latest version.
- Install OMNeT++:
- Based on the operating system install the OMNet++.
- Download and Install INET Framework:
- The INET framework provides models for internet protocols and is often used with OMNeT++.
Step 2: Set Up Your Project
- Create a New OMNeT++ Project:
- Open the OMNeT++ IDE.
- Go to File -> New -> OMNeT++ Project.
- Enter a project name and select the appropriate options.
- Set Up Directory Structure:
- Make sure the projects have the essential folders like src for source files and simulations for NED files and configuration.
- Add INET to Your Project:
- Right-click on your project in the Project Explorer.
- Select Properties -> Project References.
- Check the box for INET.
Step 3: Define WBAN Network Models Using NED
- Create NED Files:
- In the src directory, create a new NED file (e.g., WBANNetwork.ned).
- Describe the network topology in the NED file. Here’s a simple example:
package wban;
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.static.StationaryMobility;
network WBANNetwork
{
parameters:
int numSensors = default(5);
types:
channel radioChannel extends RadioMedium {}
submodules:
configurator: Ipv4NetworkConfigurator {
@display(“p=100,100”);
}
sink: Router {
@display(“p=200,100”);
}
sensor[numSensors]: StandardHost {
@display(“p=300+100*i,200”);
mobility.typename = “StationaryMobility”;
}
radioMedium: radioChannel {
@display(“p=400,100”);
}
connections allowunconnected:
for i=0..numSensors-1 {
sensor[i].wlan[0] <–> radioMedium <–> sink.wlan[0];
}
}
Step 4: Implement WBAN Communication Logic
- Create C++ Modules for Sensors and Sink:
- In the src directory, we need to generate new C++ classes (e.g., WbanSensorApp.cc and WbanSinkApp.cc).
- Embrace necessary OMNeT++ headers and define your WBAN communication logic.
- Sensor Application Implementation:
#include <omnetpp.h>
#include “inet/applications/base/ApplicationBase.h”
#include “inet/common/packet/Packet.h”
#include “inet/networklayer/common/L3AddressResolver.h”
using namespace omnetpp;
using namespace inet;
class WbanSensorApp : public ApplicationBase
{
protected:
virtual void initialize(int stage) override;
virtual void handleMessageWhenUp(cMessage *msg) override;
void sendSensorData();
void handleData(cPacket *pkt);
cMessage *sendEvent = nullptr;
};
Define_Module(WbanSensorApp);
void WbanSensorApp::initialize(int stage)
{
ApplicationBase::initialize(stage);
if (stage == INITSTAGE_LOCAL) {
sendEvent = new cMessage(“sendSensorData”);
scheduleAt(simTime() + par(“startTime”), sendEvent);
}
}
void WbanSensorApp::handleMessageWhenUp(cMessage *msg)
{
if (msg == sendEvent) {
sendSensorData();
scheduleAt(simTime() + par(“sendInterval”), sendEvent);
} else {
cPacket *pkt = check_and_cast<cPacket *>(msg);
handleData(pkt);
}
}
void WbanSensorApp::sendSensorData()
{
// Create and send a sensor data packet to the sink node
EV << “Sending sensor data” << endl;
Packet *pkt = new Packet(“SensorData”);
pkt->setByteLength(par(“dataSize”));
send(pkt, “lowerLayerOut”);
}
void WbanSensorApp::handleData(cPacket *pkt)
{
// Handle received data packet
EV << “Received data: ” << pkt->getName() << endl;
delete pkt;
}
- Sink Application Implementation:
#include <omnetpp.h>
#include “inet/applications/base/ApplicationBase.h”
#include “inet/common/packet/Packet.h”
#include “inet/networklayer/common/L3AddressResolver.h”
using namespace omnetpp;
using namespace inet;
class WbanSinkApp : public ApplicationBase
{
protected:
virtual void initialize(int stage) override;
virtual void handleMessageWhenUp(cMessage *msg) override;
void handleSensorData(cPacket *pkt);
};
Define_Module(WbanSinkApp);
void WbanSinkApp::initialize(int stage)
{
ApplicationBase::initialize(stage);
}
void WbanSinkApp::handleMessageWhenUp(cMessage *msg)
{
if (msg->isSelfMessage()) {
delete msg;
} else {
cPacket *pkt = check_and_cast<cPacket *>(msg);
handleSensorData(pkt);
}
}
void WbanSinkApp::handleSensorData(cPacket *pkt)
{
// Handle received sensor data packet
EV << “Received sensor data: ” << pkt->getName() << endl;
delete pkt;
}
Step 5: Configure Simulation Parameters
- Create omnetpp.ini:
- In the simulations directory, create an omnetpp.ini file.
- Describe simulation parameters, such as the duration and network parameters:
network = WBANNetwork
sim-time-limit = 100s
# Sensor application parameters
**.sensor[*].udpApp.startTime = uniform(0s, 10s)
**.sensor[*].udpApp.sendInterval = exponential(1s)
**.sensor[*].udpApp.dataSize = 256B
**.sensor[*].udpApp.localPort = 1000
**.sensor[*].udpApp.destPort = 2000
# Sink application parameters
**.sink.udpApp.localPort = 2000
Step 6: Build and Run the Simulation
- Build the Project:
- In the OMNeT++ IDE, right-click on your project and select Build Project.
- 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
- View Simulation Results:
- After the simulation completes, use OMNeT++’s tools to evaluate the outcome.
- Open the ANF (Analysis Framework) to visualize and interpret the data.
This script demonstrate how to simulate the complete projects in OMNet++ for wireless body area network that has generates the topology then apply the wireless communication logic to deploy in the application to analyse the results. We also describe how the wireless body area network is carried out in alternative simulation tools.