How to Implement Heterogeneous Networks in OMNeT++
To implement the heterogeneous networks (HetNets) in OMNeT++ encompasses sets up a recreation atmosphere with numerous kinds of wireless networks liker WiFi, LTE, 5G, major network models, executing communication protocols, and consecutively simulations. This is the comprehensive step-by-step guide to support you device HetNets in OMNeT++ by the INET framework.
Step-by-Step Implementation:
Step 1: Install OMNeT++ and INET Framework
- Download OMNeT++:
- Move the OMNeT++ download the newest form.
- Install OMNeT++:
- For the operating system we track the installation instructions delivered on the website.
- Download and Install INET Framework:
- To the internet protocols and it is regularly to use among the OMNeT++ provided by The INET framework.
- From the INET website to download it.
Step 2: Set Up Your Project
- Create a New OMNeT++ Project:
- Exposed the OMNeT++ IDE.
- Try the File -> New -> OMNeT++ Project.
- Arrive a project name and handpicked the suitable options.
- Set Up Directory Structure:
- To make sure the project has the needed folders, like src for source files and reproductions for NED files and formation.
Step 3: Define Network Models Using NED
- Create NED Files:
- In the src directory, make a new NED file such as HetNet.ned.
- Express the network topology in the NED file. Given below the modest example:
package hetnet;
import inet.node.inet.StandardHost;
import inet.node.wireless.AccessPoint;
import inet.node.cellular.LteEnb;
import inet.networklayer.configurator.ipv4.Ipv4NetworkConfigurator;
import inet.physicallayer.ieee80211.packetlevel.Ieee80211ScalarRadioMedium;
import inet.mobility.single.RandomWaypointMobility;
network HetNet
{
parameters:
int numWiFiHosts = default(10);
int numLTEHosts = default(5);
types:
channel radioChannel extends Ieee80211ScalarRadioMedium {}
submodules:
configurator: Ipv4NetworkConfigurator {
@display(“p=100,100”);
}
wifiAp: AccessPoint {
@display(“p=300,200”);
}
lteEnb: LteEnb {
@display(“p=500,200”);
}
wifiHost[numWiFiHosts]: StandardHost {
@display(“p=200+100*i,400”);
mobility.typename = “RandomWaypointMobility”;
}
lteHost[numLTEHosts]: StandardHost {
@display(“p=200+100*i,600”);
mobility.typename = “RandomWaypointMobility”;
}
radioMedium: radioChannel {
@display(“p=400,100”);
}
connections allowunconnected:
for i=0..numWiFiHosts-1 {
wifiHost[i].wlan[0] <–> radioMedium <–> wifiAp.wlan[0];
}
for i=0..numLTEHosts-1 {
lteHost[i].wlan[0] <–> radioMedium <–> lteEnb.wlan[0];
}
}
Step 4: Implement Communication Logic in C++
- Create C++ Modules:
- In the src directory, generate a new C++ class like HetNetHost.cc.
- Include necessary OMNeT++ headers and outline 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 HetNetHost : public ApplicationBase
{
protected:
virtual void initialize(int stage) override;
virtual void handleMessageWhenUp(cMessage *msg) override;
void sendPacket();
void handlePacket(cPacket *pkt);
};
Define_Module(HetNetHost);
void HetNetHost::initialize(int stage)
{
ApplicationBase::initialize(stage);
if (stage == INITSTAGE_LOCAL) {
// Initialization code
if (par(“sendPackets”).boolValue()) {
scheduleAt(simTime() + par(“startDelay”), new cMessage(“sendPacket”));
}
}
}
void HetNetHost::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 HetNetHost::sendPacket()
{
// Create and send a packet
EV << “Sending packet” << endl;
cPacket *pkt = new cPacket(“HetNetPacket”);
pkt->setByteLength(par(“packetSize”));
send(pkt, “lowerLayerOut”);
}
void HetNetHost::handlePacket(cPacket *pkt)
{
// Handle received packet
EV << “Received packet: ” << pkt->getName() << endl;
delete pkt;
}
- Modify NED to Use C++ Modules:
- Update your NED file to use your custom heterogeneous network host module:
network HetNet
{
parameters:
int numWiFiHosts = default(10);
int numLTEHosts = default(5);
types:
channel radioChannel extends Ieee80211ScalarRadioMedium {}
submodules:
configurator: Ipv4NetworkConfigurator {
@display(“p=100,100”);
}
wifiAp: AccessPoint {
@display(“p=300,200”);
}
lteEnb: LteEnb {
@display(“p=500,200”);
}
wifiHost[numWiFiHosts]: HetNetHost {
@display(“p=200+100*i,400”);
mobility.typename = “RandomWaypointMobility”;
}
lteHost[numLTEHosts]: HetNetHost {
@display(“p=200+100*i,600”);
mobility.typename = “RandomWaypointMobility”;
}
radioMedium: radioChannel {
@display(“p=400,100”);
}
connections allowunconnected:
for i=0..numWiFiHosts-1 {
wifiHost[i].wlan[0] <–> radioMedium <–> wifiAp.wlan[0];
}
for i=0..numLTEHosts-1 {
lteHost[i].wlan[0] <–> radioMedium <–> lteEnb.wlan[0];
}
}
Step 5: Configure Simulation Parameters
- Create omnetpp.ini:
- In the simulations directory, create an omnetpp.ini file.
- Define simulation parameters, such as the duration and network parameters:
[General]
network = HetNet
sim-time-limit = 100s
**.sendPackets = true
**.startDelay = 1s
**.sendInterval = 2s
**.packetSize = 1024B
**.wifiHost[*].mobility.typename = “inet.mobility.single.RandomWaypointMobility”
**.lteHost[*].mobility.typename = “inet.mobility.single.RandomWaypointMobility”
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: Analyze Results
- View Simulation Results:
- After the simulation completes, use OMNeT++’s tools to evaluate the results.
- Exposed the ANF (Analysis Framework) to visualize and interpret the data.
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