How to Implement Telecommunication in OMNeT++
To implement the telecommunication networks in OMNeT++, we need to setup the emulation scenario, describe the network and node designs that were executed in telecommunication protocols and execute the emulation. The given below are the detailed procedures on how to implement the telecommunication in OMNet
++:
Step-by-Step Implementation:
Step 1: Install OMNeT++ and INET Framework
- Download OMNeT++:
- Download the latest version of OMNeT++.
- Install OMNeT++:
- Based on the operating system download the OMNet++ simulator..
- Download and Install INET Framework:
- The INET framework delivers the design for internet protocols and commonly used with OMNeT++.
- We need to install it from the INET website.
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 project has the essential folders, like src for source files and simulations for NED files and configuration.
Step 3: Define Network Models Using NED
- Create NED Files:
- In the src directory, generate the novel NED file such as TelecomNetwork.ned.
- Define the network topology in the NED file. Here’s a simple example:
package telecom;
import inet.node.inet.StandardHost;
import inet.node.inet.Router;
import inet.node.inet.Switch;
import inet.networklayer.configurator.ipv4.Ipv4NetworkConfigurator;
import inet.physicallayer.ieee80211.packetlevel.Ieee80211ScalarRadioMedium;
import inet.mobility.single.RandomWaypointMobility;
network TelecomNetwork
{
parameters:
int numHosts = default(10);
int numRouters = default(2);
int numSwitches = default(2);
types:
channel radioChannel extends Ieee80211ScalarRadioMedium {}
submodules:
configurator: Ipv4NetworkConfigurator {
@display(“p=100,100”);
}
router[numRouters]: Router {
@display(“p=300,200+100*i”);
}
switch[numSwitches]: Switch {
@display(“p=500,200+100*i”);
}
host[numHosts]: StandardHost {
@display(“p=200+100*i,400”);
mobility.typename = “RandomWaypointMobility”;
}
radioMedium: radioChannel {
@display(“p=400,100”);
}
connections allowunconnected:
for i=0..numRouters-1 {
router[i].pppg++ <–> radioMedium <–> switch[i].pppg++;
}
for i=0..numHosts-1 {
host[i].wlan[0] <–> radioMedium <–> switch[i % numSwitches].wlan[0];
}
}
Step 4: Implement Communication Logic in C++
- Create C++ Modules:
- In the src directory, generate a new C++ class such as TelecomHost.cc.
- Include essential OMNeT++ headers and describe 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 TelecomHost : public ApplicationBase
{
protected:
virtual void initialize(int stage) override;
virtual void handleMessageWhenUp(cMessage *msg) override;
void sendPacket();
void handlePacket(cPacket *pkt);
};
Define_Module(TelecomHost);
void TelecomHost::initialize(int stage)
{
ApplicationBase::initialize(stage);
if (stage == INITSTAGE_LOCAL) {
// Initialization code
if (par(“sendPackets”).boolValue()) {
scheduleAt(simTime() + par(“startDelay”), new cMessage(“sendPacket”));
}
}
}
void TelecomHost::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 TelecomHost::sendPacket()
{
// Create and send a packet
EV << “Sending packet” << endl;
cPacket *pkt = new cPacket(“TelecomPacket”);
pkt->setByteLength(par(“packetSize”));
send(pkt, “lowerLayerOut”);
}
void TelecomHost::handlePacket(cPacket *pkt)
{
// Handle received packet
EV << “Received packet: ” << pkt->getName() << endl;
delete pkt;
}
- Modify NED to Use C++ Modules:
- Update NED file to use custom telecom host module:
network TelecomNetwork
{
parameters:
int numHosts = default(10);
int numRouters = default(2);
int numSwitches = default(2);
types:
channel radioChannel extends Ieee80211ScalarRadioMedium {}
submodules:
configurator: Ipv4NetworkConfigurator {
@display(“p=100,100”);
}
router[numRouters]: Router {
@display(“p=300,200+100*i”);
}
switch[numSwitches]: Switch {
@display(“p=500,200+100*i”);
}
host[numHosts]: TelecomHost {
@display(“p=200+100*i,400”);
mobility.typename = “RandomWaypointMobility”;
}
radioMedium: radioChannel {
@display(“p=400,100”);
}
connections allowunconnected:
for i=0..numRouters-1 {
router[i].pppg++ <–> radioMedium <–> switch[i].pppg++;
}
for i=0..numHosts-1 {
host[i].wlan[0] <–> radioMedium <–> switch[i % numSwitches].wlan[0];
}
}
Step 5: Configure Simulation Parameters
- Create omnetpp.ini:
- In the simulations directory, create an omnetpp.ini file.
- Define simulation parameters, like the duration and network parameters:
network = TelecomNetwork
sim-time-limit = 100s
**.sendPackets = true
**.startDelay = 1s
**.sendInterval = 2s
**.packetSize = 1024B
**.host[*].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 project and run the simulation.
Step 7: Analyse Results
- View Simulation Results:
- After the simulation completes, use OMNeT++’s tools to evaluate the outcomes.
- Open the ANF (Analysis Framework) to visualize and understand the data.
Overall we had implemented the telecommunication networks to analyse their performance in OMNet++ implementation tool and also we help to provide further information related to telecommunication networks.
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