How to Implement Network Packets Transmission in ns3

To implement the network packet transmission in ns3 has several steps that encompass to setup the network topology, download the network stacks and then configure the applications to create the traffic and then gather the performance metrics for analysis. The given below is the procedure on how to implement the packet transmission in ns3:

Step-by-Step Implementation:

Step 1: Set Up the Simulation Environment

• Make sure ns3 is installed in the computer.

Step 2: Create the Network Topology

• Generate the simple network topology in ns3. The given below is the sample script to set up a simple network with two nodes connected by a point-to-point link.

Step 3: Write the Script

• Here, we provide the samples on how to implement and configure the network topology ion ns3 for packet transmission:

#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 (“PacketTransmissionExample”);

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

{

CommandLine cmd;

cmd.Parse (argc, argv);

// create nodes

NodeContainer nodes;

nodes.Create (2);

// Create point-to-point links and set attributes

PointToPointHelper pointToPoint;

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

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

// Install devices and links

NetDeviceContainer devices;

devices = pointToPoint.Install (nodes);

// Install the Internet stack on the nodes

InternetStackHelper stack;

stack.Install (nodes);

// Assign IP addresses to the devices

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces = address.Assign (devices);

// Create a UDP server application on node 1

UdpEchoServerHelper echoServer (9);

ApplicationContainer serverApps = echoServer.Install (nodes.Get (1));

serverApps.Start (Seconds (1.0));

serverApps.Stop (Seconds (10.0));

// Create a UDP client application on node 0

UdpEchoClientHelper echoClient (interfaces.GetAddress (1), 9);

echoClient.SetAttribute (“MaxPackets”, UintegerValue (100));

echoClient.SetAttribute (“Interval”, TimeValue (Seconds (1.0)));

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

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

clientApps.Start (Seconds (2.0));

clientApps.Stop (Seconds (10.0));

// Enable packet capturing

pointToPoint.EnablePcapAll (“packet-transmission”);

// Run the simulation

Simulator::Run ();

Simulator::Destroy ();

return 0;

}

Explanation:

1. Create Nodes and Links:

1. • Create two nodes and connect them using a point-to-point link.

2. Install the Internet Stack:

1. • Install the Internet stack on the nodes to enable IP communication.

3. Assign IP Addresses:

1. • Assign IP addresses to the devices to enable IP communication.

4. Set Up Applications:

1. • Create a UDP Echo server on node 1.
   • Create a UDP Echo client on node 0 to send packets to the server.

5. Enable Packet Capturing:

1. • Enable packet capturing using the EnablePcapAll method to capture the transmitted packets.

6. Run Simulation:

1. • Run the simulation and then destroy it after completion.

Step 4: Compile and Run the Script

1. Save the script as packet-transmission-example.cc in the scratch directory of your ns-3 installation.
2. Compile the script using the following commands:

./waf configure

./waf build

./waf –run packet-transmission-example

Step 5: Analyze the Results

• After running the simulation, you will have pcap files generated by the EnablePcapAll You can use a tool like Wireshark to analyse these pcap files.

From the above, we all understand the basics on how to setup and configure the network topology for Network Packets Transmission that has successfully implemented by using ns3 tool. We will give the elaborate details about the network packet transmission.

We use ns3tool to integrate the simulation that is required for your project, particularly for Network Packets Transmission support. We have all the essential tools and resources to carry out performance analysis our experts ensure the successful completion of your project. Our developers can provide you with a practical explanation.