To implement a cellular network in ns-3 it includes various steps that are
- Set-up the simulation environment.
- Configure the network elements.
- Run the simulation.
The above steps are followed by us to guide our scholars, lay on us for more implementation support. These are the basic steps to analyses the cellular network in ns-3 environment.
Here, the given below are the procedures to how to implement a basic Long term evolution (LTE) cellular network in ns-3.
Prerequisites
- ns-3 installed on your system
- Basic understanding of ns-3 and C++ programming
Steps to Implement a Cellular Network in ns-3
- Install ns-3 with LTE Module: Ensure you have ns-3 installed with the LTE module. You can download ns-3 from the official website and follow the installation instructions.
wget https://www.nsnam.org/release/ns-allinone-3.xx.tar.bz2
tar -xjf ns-allinone-3.xx.tar.bz2
cd ns-allinone-3.xx
./build.py –enable-examples –enable-tests
- Set Up the Simulation Environment: Create a new script or use an existing example script to set up the LTE network. You can find example scripts in the src/lte/examples directory.
- Include Necessary Headers: Include the required headers for LTE in your script.
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/mobility-module.h”
#include “ns3/lte-module.h”
#include “ns3/internet-module.h”
#include “ns3/point-to-point-helper.h”
- Create LTE Nodes: Create nodes for the eNodeBs (base stations) and UEs (user equipment).
NodeContainer ueNodes;
NodeContainer enbNodes;
enbNodes.Create(1);
ueNodes.Create(2);
- Set Up Mobility Model: Configure the mobility model for the nodes to simulate movement.
MobilityHelper mobility;
mobility.SetMobilityModel(“ns3::ConstantPositionMobilityModel”);
mobility.Install(enbNodes);
mobility.SetMobilityModel(“ns3::ConstantVelocityMobilityModel”);
mobility.Install(ueNodes);
ueNodes.Get(0)->GetObject<MobilityModel> ()->SetPosition(Vector(0, 0, 0));
ueNodes.Get(1)->GetObject<MobilityModel> ()->SetPosition(Vector(10, 0, 0));
- Install LTE Devices: Install LTE devices on the nodes.
NetDeviceContainer enbLteDevs = lteHelper->InstallEnbDevice(enbNodes);
NetDeviceContainer ueLteDevs = lteHelper->InstallUeDevice(ueNodes);
- Attach UEs to eNodeB: Attach the UEs to the eNodeB to establish a connection.
lteHelper->Attach(ueLteDevs, enbLteDevs.Get(0));
- Install Internet Stack: Install the internet stack on the UEs to allow IP communication
InternetStackHelper internet;
internet.Install(ueNodes);
- Assign IP Addresses: Assign IP addresses to the UE devices.
Ipv4InterfaceContainer ueIpIface;
ueIpIface = epcHelper->AssignUeIpv4Address(NetDeviceContainer(ueLteDevs));
- Create Applications: Create and install applications on the UEs to generate traffic.
uint16_t dlPort = 1234;
ApplicationContainer clientApps;
ApplicationContainer serverApps;
UdpServerHelper dlPacketSinkHelper(dlPort);
serverApps.Add(dlPacketSinkHelper.Install(ueNodes.Get(0)));
UdpClientHelper dlClient(ueIpIface.GetAddress(0), dlPort);
dlClient.SetAttribute(“Interval”, TimeValue(MilliSeconds(10)));
dlClient.SetAttribute(“MaxPackets”, UintegerValue(1000000));
clientApps.Add(dlClient.Install(remoteHost));
clientApps.Start(Seconds(1.0));
clientApps.Stop(Seconds(10.0));
serverApps.Start(Seconds(1.0));
serverApps.Stop(Seconds(10.0));
- Run the Simulation: Finally, run the simulation and clean up.
Simulator::Stop(Seconds(10.0));
Simulator::Run();
Simulator::Destroy();
Example Complete Script
The given below snippet is the sample illustrative to complete the script
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/mobility-module.h”
#include “ns3/lte-module.h”
#include “ns3/internet-module.h”
#include “ns3/point-to-point-helper.h”
using namespace ns3;
int main (int argc, char *argv[])
{
Ptr<LteHelper> lteHelper = CreateObject<LteHelper> ();
Ptr<PointToPointEpcHelper> epcHelper = CreateObject<PointToPointEpcHelper> ();
lteHelper->SetEpcHelper (epcHelper);
NodeContainer ueNodes;
NodeContainer enbNodes;
enbNodes.Create (1);
ueNodes.Create (2);
MobilityHelper mobility;
mobility.SetMobilityModel (“ns3::ConstantPositionMobilityModel”);
mobility.Install (enbNodes);
mobility.SetMobilityModel (“ns3::ConstantVelocityMobilityModel”);
mobility.Install (ueNodes);
ueNodes.Get (0)->GetObject<MobilityModel> ()->SetPosition (Vector (0, 0, 0));
ueNodes.Get (1)->GetObject<MobilityModel> ()->SetPosition (Vector (10, 0, 0));
NetDeviceContainer enbLteDevs = lteHelper->InstallEnbDevice (enbNodes);
NetDeviceContainer ueLteDevs = lteHelper->InstallUeDevice (ueNodes);
lteHelper->Attach (ueLteDevs, enbLteDevs.Get (0));
InternetStackHelper internet;
internet.Install (ueNodes);
Ipv4InterfaceContainer ueIpIface;
ueIpIface = epcHelper->AssignUeIpv4Address (NetDeviceContainer (ueLteDevs));
uint16_t dlPort = 1234;
ApplicationContainer clientApps;
ApplicationContainer serverApps;
UdpServerHelper dlPacketSinkHelper (dlPort);
serverApps.Add (dlPacketSinkHelper.Install (ueNodes.Get (0)));
UdpClientHelper dlClient (ueIpIface.GetAddress (0), dlPort);
dlClient.SetAttribute (“Interval”, TimeValue (MilliSeconds (10)));
dlClient.SetAttribute (“MaxPackets”, UintegerValue (1000000));
clientApps.Add (dlClient.Install (remoteHost));
clientApps.Start (Seconds (1.0));
clientApps.Stop (Seconds (10.0));
serverApps.Start (Seconds (1.0));
serverApps.Stop (Seconds (10.0));
Simulator::Stop (Seconds (10.0));
Simulator::Run ();
Simulator::Destroy ();
return 0;
}
Running the Script
Compile and run the script using the following commands:
./waf configure –enable-examples
./waf build
./waf –run <script-name>
As we discussed earlier about how the cellular network will perform in ns-3 environment and we help to provide further information about how the cellular network will adapt in different environments.