How to Calculate Network Transmission Speed in Ns3

To calculate the network transmission speed (or throughput) in ns3, which is typically expressed in bits per second (bps), kilobits per second (kbps), or megabits per second (Mbps) we need to measure the amount of data successfully transmitted in a particular unit of time over a network.

We provide guidance on the calculation of network transmission speed in ns3 for your project. Please provide us with your parameters detail, and we will ensure that you receive the best outcomes.

Here the given below steps will guide on how to calculate network transmission speed in ns3:

Step-by-Step Guide to Calculate Network Transmission Speed in ns3

1. Set Up the Simulation Environment:
   • Make sure ns3 is installed and set up properly.
   • Include necessary modules for your simulation (e.g., LTE, WiFi, Internet, Mobility).
2. Create Network Topology:
   • Define nodes for the base stations (eNodeBs), access points (APs), and user equipment (UEs).
   • Set up the wireless network with appropriate configurations.
3. Configure Applications:
   • Install traffic-generating applications (e.g., UDP, TCP) on the UEs.
4. Enable Tracing and Metrics Collection:
   • Enable tracing to capture relevant metrics such as transmitted data and time duration.
5. Run the Simulation:
   • Execute the simulation and collect the trace data.
6. Analyze the Results:
   • Post-process the trace data to calculate the transmission speed.

Example Code Snippet for LTE Network

Here’s an example of how to set up an LTE network, generate traffic, and capture transmitted data to calculate transmission speed in ns3:

#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/lte-module.h”

#include “ns3/epc-helper.h”

#include “ns3/mobility-module.h”

#include “ns3/config-store.h”

#include “ns3/log.h”

#include “ns3/flow-monitor-module.h”

using namespace ns3;

NS_LOG_COMPONENT_DEFINE (“LteTransmissionSpeedExample”);

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

{

// Set up logging

LogComponentEnable (“UdpClient”, LOG_LEVEL_INFO);

LogComponentEnable (“UdpServer”, LOG_LEVEL_INFO);

// Create LTE network nodes

NodeContainer ueNodes;

NodeContainer enbNodes;

ueNodes.Create (10);

enbNodes.Create (3);

// Install Mobility model

MobilityHelper mobility;

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

mobility.Install (enbNodes);

mobility.SetPositionAllocator (“ns3::GridPositionAllocator”,

“MinX”, DoubleValue (0.0),

“MinY”, DoubleValue (0.0),

“DeltaX”, DoubleValue (50.0),

“DeltaY”, DoubleValue (50.0),

“GridWidth”, UintegerValue (3),

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

mobility.Install (ueNodes);

// Create LTE helper and EPC helper

Ptr<LteHelper> lteHelper = CreateObject<LteHelper> ();

Ptr<PointToPointEpcHelper> epcHelper = CreateObject<PointToPointEpcHelper> ();

lteHelper->SetEpcHelper (epcHelper);

// Install LTE devices to the nodes

NetDeviceContainer enbLteDevs = lteHelper->InstallEnbDevice (enbNodes);

NetDeviceContainer ueLteDevs = lteHelper->InstallUeDevice (ueNodes);

// Install Internet stack on UEs

InternetStackHelper internet;

internet.Install (ueNodes);

// Assign IP addresses to UEs

Ipv4InterfaceContainer ueIpIface;

ueIpIface = epcHelper->AssignUeIpv4Address (NetDeviceContainer (ueLteDevs));

// Attach UEs to eNodeBs

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

{

lteHelper->Attach (ueLteDevs.Get (i), enbLteDevs.Get (i % enbNodes.GetN ()));

}

// Install and start applications on UEs and remote host

uint16_t dlPort = 1234;

ApplicationContainer clientApps;

ApplicationContainer serverApps;

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

{

UdpServerHelper myServer (dlPort);

serverApps.Add (myServer.Install (ueNodes.Get (i)));

UdpClientHelper myClient (ueIpIface.GetAddress (i), dlPort);

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

myClient.SetAttribute (“Interval”, TimeValue (MilliSeconds (100)));

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

clientApps.Add (myClient.Install (ueNodes.Get (i)));

}

serverApps.Start (Seconds (1.0));

serverApps.Stop (Seconds (10.0));

clientApps.Start (Seconds (2.0));

clientApps.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 transmission speed

monitor->CheckForLostPackets ();

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

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

double totalDataTransmitted = 0.0;

double totalTime = 0.0;

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

{

totalDataTransmitted += i->second.rxBytes * 8.0; // Convert bytes to bits

doubleflowDuration=i->second.timeLastRxPacket.GetSeconds()-i->second.timeFirstTxPacket.GetSeconds ();

if (flowDuration > totalTime)

{

totalTime = flowDuration;

}

}

double transmissionSpeed = totalDataTransmitted / totalTime; // in bits per second (bps)

NS_LOG_UNCOND (“Transmission Speed: ” << transmissionSpeed / 1e6 << ” Mbps”);

// Clean up

Simulator::Destroy ();

return 0;

}

Explanation:

1. Setup Logging:
   • Enable logging for the UDP applications to track their activities.
2. Create Nodes and Network:
   • Create nodes representing UEs and eNodeBs.
   • Configure mobility models for UEs and eNodeBs.
3. Install LTE and EPC Helper:
   • Create and configure LTE and EPC helpers.
   • Install LTE devices on the UEs and eNodeBs.
4. Install Internet Stack:
   • Install the Internet stack on UEs.
   • Assign IP addresses to the UEs.
5. Attach UEs to eNodeBs:
   • Attach each UE to an eNodeB. Here, a round-robin attachment is used for simplicity.
6. Install Applications:
   • Install UDP server applications on the UEs.
   • Install UDP client applications on the UEs, sending traffic to the server.
7. Set Up FlowMonitor:
   • Install a FlowMonitor to collect and analyze flow statistics.
8. Run Simulation:
   • Run the simulation for the specified duration.
9. Calculate Transmission Speed:
   • After the simulation, extract the flow statistics.
   • Calculate the total data transmitted in bits.
   • Calculate the total simulation time.
   • Compute the transmission speed as the ratio of total data transmitted to total simulation time.

Transmission Speed=Total Data Transmitted (bits)Total Simulation Time (s)\text{Transmission Speed} = \frac{\text{Total Data Transmitted (bits)}}{\text{Total Simulation Time (s)}}Transmission Speed=Total Simulation Time (s)Total Data Transmitted (bits)​

Analyzing the Results:

• Transmission Speed:
  • Transmission speed is calculated by dividing the total data transmitted (in bits) by the total simulation time (in seconds).
  • This metric provides an indication of the throughput or data rate of the network.

From the above given steps we get to know how to calculate network transmission speed in ns3 by measuring the amount of data successfully transmitted over a network link per unit of time.Additionally, we offer guidance on how your simulation performs with a clear and thorough explanation.