Steps to implement Telecommunication in ns3

To Implement telecommunication networks in ns-3 by simulating various aspects of telecommunication systems, such as cellular networks (LTE, 5G), Wi-Fi networks, or mixed (heterogeneous) networks. Below given step by step guide to implement telecommunication using LTE in ns-3, which also includes setting up eNodeBs (base stations), UEs (user equipment), and configuring mobility, network devices, and applications.

Step-by-Step Guide to Implement Telecommunication in ns-3

Install ns-3:
- Ensure ns-3 is installed. Follow the installation instructions for ns-3 if you haven’t done so already.
Create a Simulation Script:
- Create a new script file, e.g., telecom-simulation.cc.
Include Necessary Headers:

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/point-to-point-module.h”

#include “ns3/mobility-module.h”

#include “ns3/lte-module.h”

#include “ns3/applications-module.h”

Define the Main Function:

using namespace ns3;

int main (int argc, char *argv[])

{

CommandLine cmd;

cmd.Parse (argc, argv);

Set Up the Network Topology:

Create nodes for the LTE eNodeBs (base stations) and UEs (user equipment):

NodeContainer ueNodes;

ueNodes.Create (2); // Create 2 UEs

NodeContainer enbNodes;

enbNodes.Create (1); // Create 1 LTE eNodeB

Install the LTE Network Devices:

Install the LTE network devices on the eNodeB and UEs

Ptr<LteHelper> lteHelper = CreateObject<LteHelper> ();

Ptr<PointToPointEpcHelper> epcHelper = CreateObject<PointToPointEpcHelper> ();

lteHelper->SetEpcHelper (epcHelper);

Ptr<Node> pgw = epcHelper->GetPgwNode ();

// Install LTE Devices to the eNodeB and UEs

NetDeviceContainer enbLteDevs = lteHelper->InstallEnbDevice (enbNodes);

NetDeviceContainer ueLteDevs = lteHelper->InstallUeDevice (ueNodes);

// Install the IP stack on the UEs

InternetStackHelper internet;

internet.Install (ueNodes);

// Assign IP addresses to the UEs

Ipv4InterfaceContainer ueIpIface;

ueIpIface = epcHelper->AssignUeIpv4Address (NetDeviceContainer (ueLteDevs));

// Attach the UEs to the eNodeB

lteHelper->Attach (ueLteDevs, enbLteDevs.Get (0));

Install Mobility Models:

Set up the mobility model for the eNodeB and UEs

MobilityHelper mobility;

mobility.SetMobilityModel (“ns3::ConstantPositionMobilityModel”);

mobility.Install (enbNodes);

mobility.SetMobilityModel (“ns3::ConstantVelocityMobilityModel”);

mobility.Install (ueNodes);

// Set initial positions and velocities for UEs

Ptr<ConstantVelocityMobilityModel> ueMobility1 = ueNodes.Get(0)->GetObject<ConstantVelocityMobilityModel>();

ueMobility1->SetPosition (Vector (0, 0, 0));

ueMobility1->SetVelocity (Vector (20, 0, 0)); // Moving at 20 m/s

Ptr<ConstantVelocityMobilityModel> ueMobility2 = ueNodes.Get(1)->GetObject<ConstantVelocityMobilityModel>();

ueMobility2->SetPosition (Vector (50, 0, 0));

ueMobility2->SetVelocity (Vector (-10, 0, 0)); // Moving at -10 m/s

Install Applications:

Create and install a UDP echo server application on one of the UEs

UdpEchoServerHelper echoServer (9);

ApplicationContainer serverApps = echoServer.Install (ueNodes.Get (0));

serverApps.Start (Seconds (1.0));

serverApps.Stop (Seconds (10.0));

// Create and install a UDP echo client application on the other UE:

UdpEchoClientHelper echoClient (ueIpIface.GetAddress (0), 9);

echoClient.SetAttribute (“MaxPackets”, UintegerValue (1));

echoClient.SetAttribute (“Interval”, TimeValue (Seconds (1.0)));

echoClient.SetAttribute (“PacketSize”, UintegerValue (1024));

ApplicationContainer clientApps = echoClient.Install (ueNodes.Get (1));

clientApps.Start (Seconds (2.0));

clientApps.Stop (Seconds (10.0));

Run the Simulation:

Define the simulation stop time and start the simulator

Simulator::Stop (Seconds (10.0));

Simulator::Run ();

Simulator::Destroy ();

return 0;

Example Complete Script (telecom-simulation.cc):

Some example script for simulating telecommunication was given below: