How to Implement Energy Harvesting in URLLC in ns3

To implement energy harvesting in Ultra-Reliable Low-Latency Communications (URLLC) in ns3, we need to create a scenario in which the nodes harvest energy to use it in communication from the environment. This energy harvesting can be mainly useful in IoT networks where energy efficiency is critical. Below given steps will guide on how to implement this harvesting in ns3.

Step-by-step to implement Energy harvesting in URLLC in ns3

Step 1: Set Up the ns3 Environment

1. Install ns-3: Make sure that ns3 is installed on the system.

sudo apt-get update

sudo apt-get install ns3

Create a New ns-3 Project: Create a directory for the new project within the ns3 workspace.

cd ns3

mkdir scratch/energy-harvesting-urlc

Step 2: Install Required Modules

Ensure that the necessary modules installed. For energy harvesting and URLLC, you might need energy, lte, and internet modules.

Step 3: Implement Energy Harvesting Model

1. Create an Energy Source Model: Define an energy source model to simulate energy harvesting. ns3 provides a basic energy framework for extending.

// CustomEnergySource.h

#ifndef CUSTOM_ENERGY_SOURCE_H

#define CUSTOM_ENERGY_SOURCE_H

#include “ns3/energy-source.h”

namespace ns3 {

class CustomEnergySource : public EnergySource {

public:

static TypeId GetTypeId (void);

CustomEnergySource ()

virtual ~CustomEnergySource ();

void UpdateEnergyHarvested ();

private:

double m_energyHarvested;

Time m_lastUpdateTime;

};

} // namespace ns3

#endif // CUSTOM_ENERGY_SOURCE_H

// CustomEnergySource.cc

#include “CustomEnergySource.h”

#include “ns3/log.h”

namespace ns3 {

NS_LOG_COMPONENT_DEFINE (“CustomEnergySource”);

TypeId CustomEnergySource::GetTypeId (void) {

static TypeId tid = TypeId (“ns3::CustomEnergySource”)

.SetParent<EnergySource> ()

.SetGroupName (“Energy”)

.AddConstructor<CustomEnergySource> ();

return tid;

}

CustomEnergySource::CustomEnergySource () : m_energyHarvested (0.0) {

m_lastUpdateTime = Simulator::Now ();

}

CustomEnergySource::~CustomEnergySource () {}

void CustomEnergySource::UpdateEnergyHarvested () {

Time now = Simulator::Now ();

double timeElapsed = (now – m_lastUpdateTime).GetSeconds ();

double energyHarvested = timeElapsed * 0.1; // Example harvesting rate

m_energyHarvested += energyHarvested;

m_lastUpdateTime = now;

NS_LOG_UNCOND (“Energy harvested: ” << m_energyHarvested);

}

} // namespace ns3

Step 4: Integrate Energy Harvesting with URLLC

1. Set Up the Simulation Script: Create a new script to integrate energy harvesting with URLLC.

// energy-harvesting-urlc.cc

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/lte-module.h”

#include “ns3/mobility-module.h”

#include “ns3/energy-module.h”

#include “CustomEnergySource.h”

using namespace ns3;

NS_LOG_COMPONENT_DEFINE (“EnergyHarvestingURLLC”);

void UpdateEnergySources (NodeContainer nodes) {

for (NodeContainer::Iterator i = nodes.Begin (); i != nodes.End (); ++i) {

Ptr<Node> node = *i;

Ptr<CustomEnergySource> energySource = node->GetObject<CustomEnergySource> ();

if (energySource) {

energySource->UpdateEnergyHarvested ();

}

}

Simulator::Schedule (Seconds (1.0), &UpdateEnergySources, nodes);

}

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

CommandLine cmd;

cmd.Parse (argc, argv);

NodeContainer ueNodes;

ueNodes.Create (1);

NodeContainer enbNodes;

enbNodes.Create (1);

MobilityHelper mobility;

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

mobility.Install (ueNodes);

mobility.Install (enbNodes);

// Install LTE Devices to the nodes

NetDeviceContainer ueLteDevs;

NetDeviceContainer enbLteDevs;

LteHelper lteHelper;

enbLteDevs = lteHelper.InstallEnbDevice (enbNodes);

ueLteDevs = lteHelper.InstallUeDevice (ueNodes);

// Attach one UE to a eNB

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

// Install the IP stack on the UEs

InternetStackHelper internet;

internet.Install (ueNodes);

internet.Install (enbNodes);

Ipv4AddressHelper ipv4;

ipv4.SetBase (“7.0.0.0”, “255.0.0.0”);

Ipv4InterfaceContainer ueIpIface;

ueIpIface = ipv4.Assign (ueLteDevs);

// Add a custom energy source to the UE

Ptr<CustomEnergySource> customEnergySource = CreateObject<CustomEnergySource> ();

ueNodes.Get (0)->AggregateObject (customEnergySource);

// Set up applications

uint16_t dlPort = 10000;

ApplicationContainer clientApps;

ApplicationContainer serverApps;

// Install and start applications on UEs and remote host

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

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

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

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

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

clientApps.Start (Seconds (0.1));

clientApps.Stop (Seconds (10.0));

UdpServerHelper dlPacketSinkHelper (dlPort);

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

serverApps.Start (Seconds (0.1));

serverApps.Stop (Seconds (10.0));

// Schedule energy updates

Simulator::Schedule (Seconds (1.0), &UpdateEnergySources, ueNodes);

 

Simulator::Stop (Seconds (10.0));

Simulator::Run ();

Simulator::Destroy ();

return 0;

}

Step 5: Compile and Run the Simulation

1. Compile the Script: Compile the script using the waf build system.

./waf build

Run the Simulation: Run the simulation script and observe the results.

./waf –run scratch/energy-harvesting-urlc

Step 6: Enable Tracing and Analyze Results

1. Enable Tracing: Add tracing to collect data for analysis.

AsciiTraceHelper ascii;

lteHelper.EnableAsciiAll(ascii.CreateFileStream(“energy-harvesting-urlc.tr”));

Run the Simulation: Set the simulation stop time and run it.

Simulator::Stop(Seconds(10.0));

Simulator::Run();

Simulator::Destroy();

Step 7: Analyze the Results

After running the simulation, analyze the generated trace files (energy-harvesting-urlc.tr) to study the energy harvesting dynamics and its impact on URLLC performance.

Finally, we had learnt to implement the Energy harvesting in URLLC in ns3, and also the terms and models involved in it while the simulating the process for analyzing the results.

Explore ns3simulation.com for superior outcomes and summarized discoveries on diverse project ideas and performance assessments related to Energy Harvesting in URLLC within the ns3 tool.