How to implement network PAPR mitigation in ns3

To Implementing Network Peak-to-Average Power Ratio (PAPR) mitigation in ns3 includes wireless communication systems to producing a simulation situation which includes methods for dropping PAPR.  Now we see a step-by-step guide to achieve this:

Step-by-Step Implementation:

Step 1: Install ns3

Make sure ns3 is installed on your system.

Step 2: Create a Custom PAPR Mitigation Class

To make a custom class to handle PAPR mitigation techniques.  The first method is to use clipping and filtering, however we use other methods like Selective Mapping (SLM) and Partial Transmit Sequences (PTS).

1. Create a new file, e.g., papr-mitigation-helper.h:

#ifndef PAPR_MITIGATION_HELPER_H

#define PAPR_MITIGATION_HELPER_H

#include “ns3/node-container.h”

#include “ns3/net-device-container.h”

#include “ns3/wifi-helper.h”

#include “ns3/yans-wifi-helper.h”

#include “ns3/mobility-helper.h”

namespace ns3 {

class PaprMitigationHelper {

public:

PaprMitigationHelper ();

void Install (NodeContainer nodes);

void SetClippingThreshold (double threshold);

void ApplyClippingAndFiltering (Ptr<Packet> packet);

private:

NodeContainer m_nodes;

double m_clippingThreshold;

};

} // namespace ns3

#endif // PAPR_MITIGATION_HELPER_H

Create the implementation file, e.g., papr-mitigation-helper.cc:

#include “papr-mitigation-helper.h”

#include “ns3/packet.h”

#include “ns3/log.h”

namespace ns3 {

NS_LOG_COMPONENT_DEFINE (“PaprMitigationHelper”);

PaprMitigationHelper::PaprMitigationHelper ()

: m_clippingThreshold (1.0) // default clipping threshold

{

}

void

PaprMitigationHelper::Install (NodeContainer nodes) {

m_nodes = nodes;

}

void

PaprMitigationHelper::SetClippingThreshold (double threshold) {

m_clippingThreshold = threshold;

}

void

PaprMitigationHelper::ApplyClippingAndFiltering (Ptr<Packet> packet) {

// Implement clipping and filtering algorithm

// This is a simplified example

uint8_t* buffer = new uint8_t[packet->GetSize ()];

packet->CopyData (buffer, packet->GetSize ());

for (uint32_t i = 0; i < packet->GetSize (); ++i) {

if (buffer[i] > m_clippingThreshold) {

buffer[i] = m_clippingThreshold;

}

}

packet->RemoveAtStart (packet->GetSize ());

packet->AddAtEnd (Create<Packet> (buffer, packet->GetSize ()));

delete[] buffer;

}

} // namespace ns3

Step 3: Integrate the Helper Class into Your Simulation

Now we use the custom helper class in the simulation script to accomplish PAPR mitigation.

1. Include the helper header in your simulation script:

#include “papr-mitigation-helper.h”

Create and configure the nodes and mobility:

NodeContainer nodes;

nodes.Create (4); // create 4 nodes for example

MobilityHelper mobility;

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

PaprMitigationHelper paprHelper;

paprHelper.SetClippingThreshold (1.5); // Set the clipping threshold

paprHelper.Install (nodes);

Configure the communication settings and apply PAPR mitigation:

// Set up Wi-Fi

YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default ();

YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default ();

wifiPhy.SetChannel (wifiChannel.Create ());

WifiHelper wifi;

wifi.SetStandard (WIFI_PHY_STANDARD_80211n_5GHZ);

WifiMacHelper wifiMac;

wifiMac.SetType (“ns3::AdhocWifiMac”);

NetDeviceContainer devices = wifi.Install (wifiPhy, wifiMac, nodes);

// Install mobility

mobility.Install (nodes);

// Apply PAPR mitigation on packets

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

Ptr<Node> node = nodes.Get (i);

node->GetDevice (0)->SetReceiveCallback (MakeCallback (&PaprMitigationHelper::ApplyClippingAndFiltering, &paprHelper));

}

// Set up applications and start the simulation

// Configure data rates, set up traffic, etc.

Step 4: Compile and Run Your Simulation

To compile ns3 simulation script with the new helper class and by using PAPR mitigation to run the simulation.

Example Compilation Command:

./waf configure

./waf build

./waf –run your-simulation-script

Example Simulation Script:

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/mobility-module.h”

#include “ns3/wifi-module.h”

#include “papr-mitigation-helper.h”

using namespace ns3;

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

NodeContainer nodes;

nodes.Create (4);

MobilityHelper mobility;

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

PaprMitigationHelper paprHelper;

paprHelper.SetClippingThreshold (1.5);

paprHelper.Install (nodes);

// Set up Wi-Fi

YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default ();

YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default ();

wifiPhy.SetChannel (wifiChannel.Create ());

WifiHelper wifi;

wifi.SetStandard (WIFI_PHY_STANDARD_80211n_5GHZ);

WifiMacHelper wifiMac;

wifiMac.SetType (“ns3::AdhocWifiMac”);

NetDeviceContainer devices = wifi.Install (wifiPhy, wifiMac, nodes);

// Install mobility

mobility.Install (nodes);

// Apply PAPR mitigation on packets

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

Ptr<Node> node = nodes.Get (i);

node->GetDevice (0)->SetReceiveCallback (MakeCallback (&PaprMitigationHelper::ApplyClippingAndFiltering, &paprHelper));

}

// Start simulation

Simulator::Run ();

Simulator::Destroy ();

 

return 0;

}

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