How to Calculate Network Efficiency in ns3

To calculate the network efficiency in ns3, we need to estimate how effectively the network uses its resources to provide the data packets. We can be quantified by comparing the amount of useful data transmitted successfully to the total amount of resources like bandwidth, energy were used.

Below are the procedures and samples on how to attain this in ns3:

Step-by-Step Guide to Calculate Network Efficiency in ns3

1. Set Up the Simulation Environment:
   • Download ns3 in the computer.
   • Take account into the essential modules in the simulation (e.g., Internet, Mobility, specific routing protocols).
2. Create Network Topology:
   • Define nodes and configure the network topology.
   • Set up point-to-point links, WiFi devices, and mobility models for the nodes.
3. Configure Applications:
   • Install traffic-generating applications (e.g., UDP, TCP) on the nodes.
4. Enable Tracing and Metrics Collection:
   • Enable tracing to capture relevant metrics such as transmitted data, received data, and resource usage.
5. Run the Simulation:
   • Execute the simulation and collect the trace data.
6. Analyze the Results:
   • Post-process the trace data to calculate network efficiency.

Example Code Snippet for Network Efficiency

The given below is the sample on how to setup a network, generate traffic, and capture metrics to compute network efficiency in ns-3:

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/point-to-point-module.h”

#include “ns3/applications-module.h”

#include “ns3/mobility-module.h”

#include “ns3/flow-monitor-module.h”

#include “ns3/log.h”

using namespace ns3;

NS_LOG_COMPONENT_DEFINE (“NetworkEfficiencyExample”);

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

{

// Set up logging

LogComponentEnable (“UdpClient”, LOG_LEVEL_INFO);

LogComponentEnable (“UdpServer”, LOG_LEVEL_INFO);

// Create nodes

NodeContainer nodes;

nodes.Create (4);

// Install Mobility model

MobilityHelper mobility;

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

mobility.Install (nodes);

// Create point-to-point links

PointToPointHelper pointToPoint;

pointToPoint.SetDeviceAttribute (“DataRate”, StringValue (“5Mbps”));

pointToPoint.SetChannelAttribute (“Delay”, StringValue (“2ms”));

NetDeviceContainer devices;

devices.Add(pointToPoint.Install(nodes.Get(0), nodes.Get(1)));

devices.Add(pointToPoint.Install(nodes.Get(1), nodes.Get(2)));

devices.Add(pointToPoint.Install(nodes.Get(2), nodes.Get(3)));

// Install Internet stack

InternetStackHelper internet;

internet.Install (nodes);

// Assign IP addresses

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces = address.Assign (devices);

// Install and start applications on nodes

uint16_t port = 9; // Discard port (RFC 863)

UdpServerHelper server (port);

ApplicationContainer serverApp = server.Install (nodes.Get (3));

serverApp.Start (Seconds (1.0));

serverApp.Stop (Seconds (10.0));

UdpClientHelper client (interfaces.GetAddress (3), port);

client.SetAttribute (“MaxPackets”, UintegerValue (320));

client.SetAttribute (“Interval”, TimeValue (MilliSeconds (50)));

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

ApplicationContainer clientApp = client.Install (nodes.Get (0));

clientApp.Start (Seconds (2.0));

clientApp.Stop (Seconds (10.0));

// Set up FlowMonitor to collect performance metrics

FlowMonitorHelper flowmon;

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

// Run the simulation

Simulator::Stop (Seconds (11.0));

Simulator::Run ();

// Calculate total data transmitted and received

monitor->CheckForLostPackets ();

Ptr<Ipv4FlowClassifier> classifier = DynamicCast<Ipv4FlowClassifier> (flowmon.GetClassifier ());

std::map<FlowId, FlowMonitor::FlowStats> stats = monitor->GetFlowStats ();

double totalDataTx = 0.0;

double totalDataRx = 0.0;

for (std::map<FlowId, FlowMonitor::FlowStats>::const_iterator i = stats.begin (); i != stats.end (); ++i)

{

Ipv4FlowClassifier::FiveTuple t = classifier->FindFlow (i->first);

totalDataTx += i->second.txBytes;

totalDataRx += i->second.rxBytes;

}

// Calculate network efficiency

double efficiency = totalDataRx / totalDataTx;

NS_LOG_UNCOND (“Total Data Transmitted: ” << totalDataTx << ” bytes”);

NS_LOG_UNCOND (“Total Data Received: ” << totalDataRx << ” bytes”);

NS_LOG_UNCOND (“Network Efficiency: ” << efficiency);

// Clean up

Simulator::Destroy ();

return 0;

}

Explanation:

1. Setup Logging:
   • Enable logging for the UDP applications to track their activities.
2. Create Nodes:
   • Create a set of nodes representing devices in the network.
3. Install Mobility Model:
   • Install a mobility model on the nodes (e.g., ConstantPositionMobilityModel).
4. Create Point-to-Point Links:
   • Install point-to-point links between the nodes.
5. Install Internet Stack:
   • Install the Internet stack on the nodes.
6. Assign IP Addresses:
   • Assign IP addresses to the network interfaces.
7. Install Applications:
   • Install UDP server and client applications on the nodes.
8. Set Up FlowMonitor:
   • Install FlowMonitor to collect and analyze flow statistics.
9. Run Simulation:
   • Run the simulation for the specified duration.
10. Calculate Total Data Transmitted and Received:
    • After the simulation, extract flow statistics and calculate the total data transmitted and received.
11. Calculate Network Efficiency:
    • Calculate network efficiency as the ratio of total data received to total data transmitted.

Analysing the Results:

• Total Data Transmitted:
  • The total amount of data transmitted by the network in bytes.
• Total Data Received:
  • The total amount of data successfully received by the network in bytes.
• Network Efficiency:
  • Network efficiency is calculated as the ratio of the total data received to the total data transmitted.
  • A higher efficiency value indicates a more efficient network where a larger proportion of the transmitted data is successfully received.

Network Efficiency can be estimated how effectively the network uses its resources to provide the data packets that attain this in ns3 tool. We support and provide the more about how network efficiency performs in different simulation tools.

Performance analysis will be carried out by us , drop your parameter details with us we guide you on network efficiency in ns3simulation.