How to Implement Network Small Cell Nets in ns3

To implement the network small cell network in ns3 has encompasses to mimic the scenario where small cell base stations like femtocells or picocells are implemented to improve the coverage and capacity in a wireless network. This procedure will demonstrate the detailed setup for small cell network in ns3.

Step-by-Step Implementations:

Step 1: Set Up ns3 Environment

1. Download ns3: Install ns3
2. Install ns3: Follow the installation instructions for your operating system.
3. Familiarize yourself with ns3 basics: Understand how to create nodes, set up channels, and run basic simulations.

Step 2: Define Network Topology

Create a network topology that includes small cell base stations and user equipment (UE) nodes.

Create Small Cell Network Topology

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

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

#include “ns3/lte-module.h”

#include “ns3/applications-module.h”

#include “ns3/mobility-module.h”

using namespace ns3;

NS_LOG_COMPONENT_DEFINE(“SmallCellNetworkSimulation”);

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

{

CommandLine cmd;

cmd.Parse(argc, argv);

// Create nodes

NodeContainer ueNodes;

ueNodes.Create(5); // User equipment (UE) nodes

NodeContainer enbNodes;

enbNodes.Create(3); // Small cell eNB (base station) nodes

// Set up LTE

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

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

lteHelper->SetEpcHelper(epcHelper);

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

InternetStackHelper internet;

internet.Install(ueNodes);

// Set up mobility

MobilityHelper mobility;

mobility.SetPositionAllocator(“ns3::GridPositionAllocator”,

“MinX”, DoubleValue(0.0),

“MinY”, DoubleValue(0.0),

“DeltaX”, DoubleValue(10.0),

“DeltaY”, DoubleValue(10.0),

“GridWidth”, UintegerValue(3),

“LayoutType”, StringValue(“RowFirst”));

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

mobility.Install(enbNodes);

mobility.SetMobilityModel(“ns3::RandomWalk2dMobilityModel”,

“Bounds”, RectangleValue(Rectangle(-50, 50, -50, 50)));

mobility.Install(ueNodes);

// Install LTE devices to the nodes

NetDeviceContainer enbLteDevs = lteHelper->InstallEnbDevice(enbNodes);

NetDeviceContainer ueLteDevs = lteHelper->InstallUeDevice(ueNodes);

// Attach UEs to the eNBs

for (uint32_t i = 0; i < ueNodes.GetN(); ++i)

{

lteHelper->Attach(ueLteDevs.Get(i), enbLteDevs.Get(i % enbNodes.GetN()));

}

// Assign IP addresses

Ipv4InterfaceContainer ueIpIface;

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

// Install and start applications on UEs and remote host

uint16_t dlPort = 1234;

ApplicationContainer clientApps, serverApps;

// Install and start applications on UEs and remote host

for (uint32_t i = 0; i < ueNodes.GetN(); ++i)

{

UdpClientHelper dlClient(ueIpIface.GetAddress(i), dlPort);

dlClient.SetAttribute(“Interval”, TimeValue(MilliSeconds(100)));

dlClient.SetAttribute(“MaxPackets”, UintegerValue(1000));

clientApps.Add(dlClient.Install(pgw));

UdpServerHelper dlServer(dlPort);

serverApps.Add(dlServer.Install(ueNodes.Get(i)));

}

serverApps.Start(Seconds(0.01));

clientApps.Start(Seconds(0.01));

// Enable tracing

lteHelper->EnableTraces();

Simulator::Run();

Simulator::Destroy();

return 0;

}

Step 3: Configure Mobility

Set up mobility models to simulate realistic scenarios where UEs can move.

// Set up mobility

MobilityHelper mobility;

mobility.SetPositionAllocator(“ns3::GridPositionAllocator”,

“MinX”, DoubleValue(0.0),

“MinY”, DoubleValue(0.0),

“DeltaX”, DoubleValue(10.0),

“DeltaY”, DoubleValue(10.0),

“GridWidth”, UintegerValue(3),

“LayoutType”, StringValue(“RowFirst”));

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

mobility.Install(enbNodes);

mobility.SetMobilityModel(“ns3::RandomWalk2dMobilityModel”,

“Bounds”, RectangleValue(Rectangle(-50, 50, -50, 50)));

mobility.Install(ueNodes);

Step 4: Install and Configure Applications

Install applications on the nodes to generate and process network traffic.

// Install and start applications on UEs and remote host

uint16_t dlPort = 1234;

ApplicationContainer clientApps, serverApps;

// Install and start applications on UEs and remote host

for (uint32_t i = 0; i < ueNodes.GetN(); ++i)

{

UdpClientHelper dlClient(ueIpIface.GetAddress(i), dlPort);

dlClient.SetAttribute(“Interval”, TimeValue(MilliSeconds(100)));

dlClient.SetAttribute(“MaxPackets”, UintegerValue(1000));

clientApps.Add(dlClient.Install(pgw));

UdpServerHelper dlServer(dlPort);

serverApps.Add(dlServer.Install(ueNodes.Get(i)));

}

serverApps.Start(Seconds(0.01));

clientApps.Start(Seconds(0.01));

Step 5: Enable Tracing

Enable tracing to analyze the network performance.

// Enable tracing

lteHelper->EnableTraces();

Full Example Code

Here, we provide the complete sample code is as follows:

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

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

#include “ns3/lte-module.h”

#include “ns3/applications-module.h”

#include “ns3/mobility-module.h”

using namespace ns3;

NS_LOG_COMPONENT_DEFINE(“SmallCellNetworkSimulation”);

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

{

CommandLine cmd;

cmd.Parse(argc, argv);

// Create nodes

NodeContainer ueNodes;

ueNodes.Create(5); // User equipment (UE) nodes

NodeContainer enbNodes;

enbNodes.Create(3); // Small cell eNB (base station) nodes

// Set up LTE

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

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

lteHelper->SetEpcHelper(epcHelper);

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

InternetStackHelper internet;

internet.Install(ueNodes);

// Set up mobility

MobilityHelper mobility;

mobility.SetPositionAllocator(“ns3::GridPositionAllocator”,

“MinX”, DoubleValue(0.0),

“MinY”, DoubleValue(0.0),

“DeltaX”, DoubleValue(10.0),

“DeltaY”, DoubleValue(10.0),

“GridWidth”, UintegerValue(3),

“LayoutType”, StringValue(“RowFirst”));

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

mobility.Install(enbNodes);

mobility.SetMobilityModel(“ns3::RandomWalk2dMobilityModel”,

“Bounds”, RectangleValue(Rectangle(-50, 50, -50, 50)));

mobility.Install(ueNodes);

// Install LTE devices to the nodes

NetDeviceContainer enbLteDevs = lteHelper->InstallEnbDevice(enbNodes);

NetDeviceContainer ueLteDevs = lteHelper->InstallUeDevice(ueNodes);

// Attach UEs to the eNBs

for (uint32_t i = 0; i < ueNodes.GetN(); ++i)

{

lteHelper->Attach(ueLteDevs.Get(i), enbLteDevs.Get(i % enbNodes.GetN()));

}

// Assign IP addresses

Ipv4InterfaceContainer ueIpIface;

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

// Install and start applications on UEs and remote host

uint16_t dlPort = 1234;

ApplicationContainer clientApps, serverApps;

// Install and start applications on UEs and remote host

for (uint32_t i = 0; i < ueNodes.GetN(); ++i)

{

UdpClientHelper dlClient(ueIpIface.GetAddress(i), dlPort);

dlClient.SetAttribute(“Interval”, TimeValue(MilliSeconds(100)));

dlClient.SetAttribute(“MaxPackets”, UintegerValue(1000));

clientApps.Add(dlClient.Install(pgw));

UdpServerHelper dlServer(dlPort);

serverApps.Add(dlServer.Install(ueNodes.Get(i)));

}

serverApps.Start(Seconds(0.01));

clientApps.Start(Seconds(0.01));

// Enable tracing

lteHelper->EnableTraces();

Simulator::Run();

Simulator::Destroy();

return 0;

}

Overall, we had successfully implemented the network small cell in ns3 tool that involves generating the topology that contains the base stations and user equipment and then we analyse the outcome based on this functionalities. We also give the further insights about the network small cell.

Submit your research data to ns3simulation.com for a comprehensive analysis of Network Small Cell Nets in ns3. Our team of developers is equipped with advanced simulation tools to handle complex scenarios for your project. We specialize in implementing small cell base stations such as femtocells and picocells.