Steps to Implement LTE in ns3

To implement the LTE in ns-3 consists to set-up a network with eNodeBs (base station) and UEs (user equipment). Implementation and system development can be relied on us.

Here are the steps to follow how to simulate the LTE in ns-3 environment.

Step-by-Step Guide to Implement LTE 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., lte-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 and UEs

NodeContainer ueNodes;

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

NodeContainer enbNodes;

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

Configure Mobility:

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 (lte-simulation.cc):

Below is the snippet to complete the script for LTE simulation in ns-3 environment.