Steps to Implement Heterogeneous Networks in ns3

To implement the heterogeneous networks (HetNets) in ns-3 consist to simulate the network with multiple kinds of radio access technologies like LTE and Wi-Fi and that permits user Equipment (UE) to switch among them. Foe best simulation guidance rely on our team.

These procedures will show how to set up a fundamental to implement the HetNet with both LTE and Wi-Fi in ns-3 environment

Step-by-Step Guide to Implement Heterogeneous Networks 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., hetnet-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/wifi-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 LTE eNodeBs, Wi-Fi access points, and UEs:

NodeContainer ueNodes;

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

NodeContainer enbNodes;

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

NodeContainer wifiApNode;

wifiApNode.Create (1); // Create 1 Wi-Fi AP

Install 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 Wi-Fi Network Devices:

Set up the Wi-Fi devices and install them on the UEs and AP:

YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default ();

YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default ();

wifiPhy.SetChannel (wifiChannel.Create ());

WifiHelper wifi;

wifi.SetRemoteStationManager (“ns3::AarfWifiManager”);

WifiMacHelper wifiMac;

Ssid ssid = Ssid (“ns3-wifi”);

wifiMac.SetType (“ns3::StaWifiMac”, “Ssid”, SsidValue (ssid), “ActiveProbing”, BooleanValue (false));

NetDeviceContainer staDevices = wifi.Install (wifiPhy, wifiMac, ueNodes);

wifiMac.SetType (“ns3::ApWifiMac”, “Ssid”, SsidValue (ssid));

NetDeviceContainer apDevices = wifi.Install (wifiPhy, wifiMac, wifiApNode);

// Install the IP stack on the Wi-Fi AP

internet.Install (wifiApNode);

Ipv4AddressHelper address;

address.SetBase (“192.168.1.0”, “255.255.255.0”);

Ipv4InterfaceContainer wifiInterfaces;

wifiInterfaces = address.Assign (staDevices);

wifiInterfaces.Add (address.Assign (apDevices));

Configure Mobility:

Set up the mobility model for the eNodeB, Wi-Fi AP, and UEs

MobilityHelper mobility;

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

mobility.Install (enbNodes);

mobility.Install (wifiApNode);

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 the LTE eNodeB and a UDP echo client 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));

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 (hetnet-simulation.cc):

Here we provide the sample to complete the script for hetnet simulation environment.