How to Begin Implementing a Cellular Network projects Using NS3

To stimulate an implement of Cellular Network project in ns-3 includes the replicate of main modules for cellular communication systems, like as base stations, mobile devices, and the main network. Here’s a detailed guide to get started:

Steps to Begin Implementing a Cellular Network projects Using NS3

Step 1: Understand Cellular Network Concepts

Cellular Network Components:
- Base Stations: It offers the wireless access for mobile devices.
- Mobile Devices (UEs): Smartphones or IoT devices can link the network. Core Network: It maintains the routing for authentication and session management.
Key Technologies:
- The technology includes the LTE, 5G NR (New Radio), or hybrid networks.
- The main key of method is Radio Access Network (RAN) and Evolved Packet Core (EPC).
Use Cases:
- Estimate the throughput, latency, and coverage.
- Examine the mobility and handovers.
- Study the QoS for changed the kinds of congestion.

Step 2: Install ns-3 and Enable Cellular Modules

Download ns-3:
- Get the latest version of ns-3 from the official website.
Enable LTE and Required Modules:
- Setting and create by necessary components:

./waf configure –enable-modules=lte,internet,mobility,point-to-point

./waf build

Verify Installation:
- Process for the LTE sample script the ensure a proper setup:

./waf –run lte-simple

Step 3: Define the Project Scope

Scenarios:
- Single-cell or multi-cell networks.
- The scope of mobility and handover in a multi-cell setting.
- The congestion management for multimedia applications in QoS.
Metrics:
- It provides the performance of parameter such as Throughput, delay, SINR, packet delivery ratio (PDR), handover latency.

Step 4: Set Up the Cellular Network Topology

Create Nodes:
- Outline the UEs and eNodeBs:

NodeContainer ueNodes, enbNodes;

ueNodes.Create(10); // 10 mobile devices

enbNodes.Create(2); // 2 base stations

Assign Mobility:
- Setting the mobility for fixed or mobile UEs:

MobilityHelper mobility;

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

mobility.Install(enbNodes);

mobility.SetMobilityModel(“ns3::RandomWalk2dMobilityModel”,

“Bounds”, RectangleValue(Rectangle(-100, 100, -100, 100)));

mobility.Install(ueNodes);

Step 5: Configure Cellular Components

Initialize LTE and EPC Helpers:
- Setting a LTE and EPC for cellular connectivity:

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

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

lteHelper->SetEpcHelper(epcHelper);

Install Devices:
- Improve the eNodeB and UE devices:

NetDeviceContainer enbDevices = lteHelper->InstallEnbDevice(enbNodes);

NetDeviceContainer ueDevices = lteHelper->InstallUeDevice(ueNodes);

Assign IP Addresses:
- It use the assign for EPC in IP addresses to UEs:

InternetStackHelper internet;

internet.Install(ueNodes);

Ipv4InterfaceContainer ueIpInterfaces = epcHelper->AssignUeIpv4Address(ueDevices);

Attach UEs to eNodeBs:
- It link the UEs for the nearest base station:

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

lteHelper->Attach(ueDevices.Get(i), enbDevices.Get(0));

}

Step 6: Add Traffic Applications

Install Applications:
- Build a congestion flow among UEs and the main network:

uint16_t dlPort = 1234;

ApplicationContainer serverApps, clientApps;

UdpServerHelper dlServer(dlPort);

serverApps.Add(dlServer.Install(ueNodes.Get(0)));

UdpClientHelper dlClient(ueIpInterfaces.GetAddress(0), dlPort);

dlClient.SetAttribute(“Interval”, TimeValue(Seconds(0.01)));

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

dlClient.SetAttribute(“MaxPackets”, UintegerValue(100));

clientApps.Add(dlClient.Install(enbNodes.Get(0)));

serverApps.Start(Seconds(1.0));

serverApps.Stop(Seconds(10.0));

clientApps.Start(Seconds(1.0));

clientApps.Stop(Seconds(10.0));

Add Custom Applications:
- Encompass the Application for build unique traffic congestion.

Step 7: Enable Handover (Optional)

Multi-Cell Setup:
- Assign the UEs for the second eNodeB according to their mobility:

lteHelper->HandoverRequest(Seconds(5.0), ueDevices.Get(0), enbDevices.Get(0), enbDevices.Get(1));

Handover Decision:
- It uses the select for SINR or RSRP in dynamic handover management.

Step 8: Enable Tracing and Monitoring

Enable Trace Files:
- It ensure the log PHY, MAC, and RLC actions:

lteHelper->EnablePhyTraces();

lteHelper->EnableMacTraces();

lteHelper->EnableRlcTraces();

FlowMonitor:
- Gather the network performance of parameter metrics:

FlowMonitorHelper flowMonitor;

Ptr<FlowMonitor> monitor = flowMonitor.InstallAll();

Enable PCAP:
- Seizure the packets for PCAP:

p2p.EnablePcapAll(“cellular-network”);

Step 9: Run the Simulation

Schedule Simulation:
- Describe the replication of duration and implement:

Simulator::Stop(Seconds(10.0));

Simulator::Run();

Simulator::Destroy();

Analyze Results:
- Use the outcomes for logs and trace files in examine the network behavior.

Step 10: Example: Simple LTE Simulation

Here’s a basic sample 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”

#include “ns3/applications-module.h”

using namespace ns3;

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

CommandLine cmd;

cmd.Parse(argc, argv);