How to Implement network Cell Sectorization in ns3

To implement network cell sectorization in ns3, we need to follow several steps. First, to improve coverage and capacity, we need to divide a network cell into sectors. By configuring multiple directional antennas for a base station and simulating sectorized coverage we can divide a network cell. The step given below will guide on how to set up a basic cell sectorization mechanism in ns3:

Step-by-step guide to implement network cell sectorization

Step 1: Set Up the ns3 Environment

Make sure ns3 installed on the system.

Step 2: Create a New Simulation Script

Create a new simulation script in the scratch directory of ns3 installation. For example, create a file named cell_sectorization.cc.

Step 3: Include Necessary Headers

The necessary ns3 headers at the beginning of the script has to be included.

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/wifi-module.h”

#include “ns3/mobility-module.h”

#include “ns3/applications-module.h”

#include “ns3/antenna-module.h”

 

using namespace ns3;

Step 4: Define Command-Line Arguments for Parameterization

Use the CommandLine class to define parameters that can be set through the command line.

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

{

uint32_t numNodes = 10;

double simTime = 20.0;

double radius = 100.0;

uint32_t numSectors = 3;

CommandLine cmd;

cmd.AddValue(“numNodes”, “Number of nodes”, numNodes);

cmd.AddValue(“simTime”, “Simulation time (seconds)”, simTime);

cmd.AddValue(“radius”, “Radius of the cell (meters)”, radius);

cmd.AddValue(“numSectors”, “Number of sectors”, numSectors);

cmd.Parse(argc, argv);

NodeContainer ueNodes;

ueNodes.Create(numNodes);

NodeContainer enbNodes;

enbNodes.Create(1);

 

// Configure mobility for UE nodes

MobilityHelper ueMobility;

ueMobility.SetPositionAllocator(“ns3::UniformDiscPositionAllocator”,

“X”, DoubleValue(0.0),

“Y”, DoubleValue(0.0),

“rho”, DoubleValue(radius));

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

ueMobility.Install(ueNodes);

// Configure mobility for eNB node

MobilityHelper enbMobility;

enbMobility.SetPositionAllocator(“ns3::GridPositionAllocator”,

“MinX”, DoubleValue(0.0),

“MinY”, DoubleValue(0.0),

“DeltaX”, DoubleValue(0.0),

“DeltaY”, DoubleValue(0.0),

“GridWidth”, UintegerValue(1),

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

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

enbMobility.Install(enbNodes);

 

// Install LTE Devices to the nodes

NetDeviceContainer enbLteDevs;

NetDeviceContainer ueLteDevs;

LteHelper lteHelper;

lteHelper.SetAttribute(“PathlossModel”, StringValue(“ns3::FriisPropagationLossModel”));

enbLteDevs = lteHelper.InstallEnbDevice(enbNodes);

ueLteDevs = lteHelper.InstallUeDevice(ueNodes);

// Attach UEs to eNB

lteHelper.Attach(ueLteDevs, enbLteDevs.Get(0));

// Install the IP stack on the UEs

InternetStackHelper internet;

internet.Install(ueNodes);

Ipv4AddressHelper ipv4;

ipv4.SetBase(“7.0.0.0”, “255.0.0.0”);

Ipv4InterfaceContainer ueIpIface;

ueIpIface = ipv4.Assign(ueLteDevs);

// Set the default gateway for the UEs

Ptr<Node> ueNode = ueNodes.Get(0);

Ptr<Ipv4StaticRouting>ueStaticRouting = Ipv4RoutingHelper::GetRouting<Ipv4StaticRouting>(ueNode->GetObject<Ipv4>()->GetRoutingProtocol());

ueStaticRouting->SetDefaultRoute(Ipv4Address(“7.0.0.1”), 1);

// Configure sector antennas for the eNB

Ptr<LteEnbNetDevice> enbLteDev = enbLteDevs.Get(0)->GetObject<LteEnbNetDevice>();

Ptr<IsotropicAntennaModel> enbAntenna = CreateObject<IsotropicAntennaModel>();

enbAntenna->SetAttribute(“Gain”, DoubleValue(0.0));

enbLteDev->SetAntennaModel(enbAntenna);

for (uint32_t sector = 0; sector < numSectors; ++sector)

{

Ptr<IsotropicAntennaModel> sectorAntenna = CreateObject<IsotropicAntennaModel>();

sectorAntenna->SetAttribute(“Orientation”, DoubleValue(sector * (360.0 / numSectors)));

sectorAntenna->SetAttribute(“HorizontalBeamwidth”, DoubleValue(360.0 / numSectors));

sectorAntenna->SetAttribute(“Gain”, DoubleValue(0.0));

enbLteDev->AddAntennaModel(sectorAntenna);

}

// Install and start applications on UEs and remote host

uint16_t dlPort = 1234;

uint16_t ulPort = 2000;

ApplicationContainer clientApps;

ApplicationContainer serverApps;

 

// UDP downlink flow

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

dlClient.SetAttribute(“Interval”, TimeValue(MilliSeconds(10)));

dlClient.SetAttribute(“MaxPackets”, UintegerValue(1000000));

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

UdpServerHelper dlServer(dlPort);

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

// UDP uplink flow

UdpClientHelper ulClient(remoteHostAddr, ulPort);

ulClient.SetAttribute(“Interval”, TimeValue(MilliSeconds(10)));

ulClient.SetAttribute(“MaxPackets”, UintegerValue(1000000));

clientApps.Add(ulClient.Install(ueNodes.Get(0)));

UdpServerHelper ulServer(ulPort);

serverApps.Add(ulServer.Install(remoteHost));

serverApps.Start(Seconds(1.0));

clientApps.Start(Seconds(1.0));

Simulator::Stop(Seconds(simTime));

Simulator::Run();

Simulator::Destroy();

 

return 0;

}

Step 5: Compile and Run Your Simulation

Compile the simulation script using waf:

./waf configure

./waf build

./waf –run scratch/cell_sectorization

Step 6: Analyze the Output

To ensure that cell sectorization is being utilized and that the communication quality has improved. We can use various tracing and logging mechanisms provided by ns3, analyze the log output.

Finally, we had learnt implement network cell sectorization in ns3 environment by configuring multiple direction antennas for a base station and simulating sectorized coverage.

ns3simulation.com team provides support for network cell sectorization in ns3, ensuring effective implementation. For insights into your networking performance analysis, please keep in contact with us. Share the essential details of your project, and we will assist you in configuring multiple directional antennas tailored to your needs.