How to Implement Data Suppression in ns3

To implement data suppression in ns3, we need to create a mechanism to reduce redundant data transmission, that is particularly useful in wireless sensor networks (WSNs) to conserve energy and bandwidth.

Here is a complete guide to implement data suppression in ns3.

Steps for implementation

Step 1: Set up the simulation

Make sure that ns3 is installed in the computer. If not, install it from the official ns3 website.

Step 2: Create a New Simulation Script

In the scratch directory of our ns3, we should create a simulation script. In our example, let’s create a file named data_suppression.cc.

Step 3: Include Necessary Headers

Include all the necessary ns3 headers in our script.

#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/energy-module.h”

using namespace ns3;

Step 4: Define Command-Line Arguments for Parameterization

Define parameters that can be set through the command line.

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

{

uint32_t numNodes = 10;

double simTime = 10.0;

CommandLine cmd;

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

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

cmd.Parse(argc, argv);

NodeContainer nodes;

nodes.Create(numNodes);

YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default();

YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default();

wifiPhy.SetChannel(wifiChannel.Create());

WifiHelper wifi;

wifi.SetStandard(WIFI_STANDARD_80211n);

WifiMacHelper wifiMac;

wifiMac.SetType(“ns3::AdhocWifiMac”);

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

MobilityHelper mobility;

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

mobility.Install(nodes);

InternetStackHelper stack;

stack.Install(nodes);

Ipv4AddressHelper address;

address.SetBase(“10.1.1.0”, “255.255.255.0”);

Ipv4InterfaceContainer interfaces = address.Assign(devices);

// Install applications

uint16_t port = 9;

OnOffHelper onoff(“ns3::UdpSocketFactory”, Address(InetSocketAddress(interfaces.GetAddress(numNodes-1), port)));

onoff.SetConstantRate(DataRate(“500kbps”));

ApplicationContainer apps = onoff.Install(nodes.Get(0));

apps.Start(Seconds(1.0));

apps.Stop(Seconds(simTime));

PacketSinkHelper sink(“ns3::UdpSocketFactory”, Address(InetSocketAddress(Ipv4Address::GetAny(), port)));

apps = sink.Install(nodes.Get(numNodes-1));

apps.Start(Seconds(0.0));

apps.Stop(Seconds(simTime));

// Implement data suppression

for (uint32_t i = 0; i < numNodes; ++i)

{

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

Ptr<NetDevice> device = node->GetDevice(0);

device->GetObject<WifiNetDevice>()->GetPhy()->TraceConnectWithoutContext(“PhyTxDrop”, MakeCallback(&DataSuppression));

}

Simulator::Stop(Seconds(simTime));

Simulator::Run();

Simulator::Destroy();

return 0;

}

Step 5: Implement the Data Suppression Function

To suppress redundant data transmissions, implement a function. In our example, we will use a basic mechanism where data is suppressed if it matches previous transmissions within a certain time window.

void DataSuppression(Ptr<const Packet> packet)

{

static std::map<uint32_t, Time> lastPacketTime;

uint32_t packetHash = packet->GetUid(); // Simplistic hash for demonstration purposes

Time now = Simulator::Now();

if (lastPacketTime.find(packetHash) != lastPacketTime.end())

{

Time lastTime = lastPacketTime[packetHash];

if (now – lastTime < Seconds(1.0)) // Suppress if packet sent within last second

{

NS_LOG_UNCOND(“Packet suppressed: ” << packetHash);

return;

}

}

lastPacketTime[packetHash] = now;

NS_LOG_UNCOND(“Packet sent: ” << packetHash);

}

Step 6: Compile and Run Your Simulation

Compile your simulation script using waf:

./waf configure

./waf build

./waf –run scratch/data_suppression

Step 7: Analyze the Output

To ensure that redundant data transmissions are being suppressed, analyze the log output. The DataSuppression function will output whether a packet is suppressed or sent.

Overall, we had an analysis on the implementation of data suppression using ns3 by creating mechanisms to reduce redundant data transmission.

We’ve got you covered in every aspect of your project with top-notch results in Data Suppression using ns3simulation. Hit up ns3simulation.com for the best results. We handle all ns3tool projects and perform comparative analysis too.