How to Calculate Connection Loss in ns3

Calculating connection loss in ns3 involves monitoring and logging the packets sent and received between nodes. Connection loss can be evaluated by comparing the number of packets sent to the number of packets received successfully. This includes setting up your network, sending traffic, and logging packet transmission and reception events. We can also assist with creating project ideas for logging packet transmission, which we customize to meet your specific requirements.

Here is a complete guide to calculate connection loss in ns3.

Steps for calculation

1. Set up network topology :

• create the nodes, network devices, and connections between them.

2. Install applications :

• On the nodes, install relevant applications to generate and receive traffic.

3. Generate traffic :

• To generate traffic, use traffic generation applications like OnOffApplication or BulkSendApplication.

4. Capture Packet Transmission and Reception:

• To log packet transmission and reception events, use packet trace functions.

5. Calculate connection loss :

• Calculate connection loss by comparing the number of packets sent to the number of packets received.

Example for calculating connection loss in ns3

Here is the example for the calculation of connection loss:

#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”

using namespace ns3;

NS_LOG_COMPONENT_DEFINE (“ConnectionLossExample”);

uint32_t packetsSent = 0;

uint32_t packetsReceived = 0;

void

PacketSentCallback (Ptr<const Packet> packet)

{

packetsSent++;

}

void

PacketReceivedCallback (Ptr<const Packet> packet, const Address &address)

{

packetsReceived++;

}

int

main (int argc, char *argv[])

{

Time::SetResolution (Time::NS);

NodeContainer nodes;

nodes.Create (2);

PointToPointHelper pointToPoint;

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

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

NetDeviceContainer devices;

devices = pointToPoint.Install (nodes);

InternetStackHelper stack;

stack.Install (nodes);

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces = address.Assign (devices);

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

// Create a packet sink to receive packets on node 1

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

ApplicationContainer sinkApps = packetSinkHelper.Install (nodes.Get (1));

sinkApps.Start (Seconds (1.0));

sinkApps.Stop (Seconds (10.0));

// Create a socket to send packets from node 0

Ptr<Socket> source = Socket::CreateSocket (nodes.Get (0), UdpSocketFactory::GetTypeId ());

InetSocketAddress remote = InetSocketAddress (interfaces.GetAddress (1), port);

source->Connect (remote);

// Trace packet sent and received events

source->TraceConnectWithoutContext (“Tx”, MakeCallback (&PacketSentCallback));

Config::ConnectWithoutContext (“/NodeList/1/ApplicationList/*/$ns3::PacketSink/Rx”, MakeCallback (&PacketReceivedCallback));

// Generate traffic

OnOffHelper onOffHelper (“ns3::UdpSocketFactory”, remote);

onOffHelper.SetAttribute (“OnTime”, StringValue (“ns3::ConstantRandomVariable[Constant=1]”));

onOffHelper.SetAttribute (“OffTime”, StringValue (“ns3::ConstantRandomVariable[Constant=0]”));

onOffHelper.SetAttribute (“DataRate”, DataRateValue (DataRate (“50kbps”)));

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

ApplicationContainer clientApps = onOffHelper.Install (nodes.Get (0));

clientApps.Start (Seconds (2.0));

clientApps.Stop (Seconds (9.0));

Simulator::Run ();

Simulator::Destroy ();

double lossRate = ((packetsSent – packetsReceived) / static_cast<double>(packetsSent)) * 100;

NS_LOG_UNCOND (“Packets Sent: ” << packetsSent);

NS_LOG_UNCOND (“Packets Received: ” << packetsReceived);

NS_LOG_UNCOND (“Connection Loss Rate: ” << lossRate << ” %”);

return 0;

}

Explanation

1. Network topology setup :

Two nodes are created. Those nodes are connected using a point-to-point link.

2. Application setup :

On server node, PacketSink is installed. and On client node, a Socket is created.

3. Traffic generation :

To generate traffic from the client node, OnOffHelper is used.

4. Trace callbacks :

1. • To log the number of packets sent, PacketSentCallback is used.
   • To log the number of packets received, PacketReceivedCallback is used.

5. Calculate connection loss :

By comparing the number of packets sent and received, Calculate the connection loss rate as a percentage.

6. Logging :

Log the number of packets sent, received and calculated connection loss rate.

Overall, we had successfully learned on calculating connection loss in ns3 by monitoring and logging the packets sent and received between nodes. Also, we provide more related information on connection loss.

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