How To Implement Network Communication in NS3

To implement Network communication in ns-3 we need to set up basic network topology, configuring nodes with appropriate network devices, installing necessary protocols and application, and running the simulation to analyse communication between nodes.

Step-by-Step Guide to Implement Network Communication in ns-3

1. Install ns-3:
   • Ensure ns-3 is installed. Follow the installation instructions for ns-3 if you haven’t done so already.
2. Create a Simulation Script:
   • Create a new script file, e.g., network-communication.cc.
3. Include Necessary Headers:

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

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

#include “ns3/mobility-module.h”

#include “ns3/applications-module.h”

Define the Main Function:

using namespace ns3;

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

{

  CommandLine cmd;

  cmd.Parse (argc, argv);

Set Up the Network Topology:

• Create nodes and configure network settings

NodeContainer nodes;

nodes.Create (2); // Create 2 nodes

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);

Configure Mobility:

• Set up mobility models for the nodes (optional)

MobilityHelper mobility;

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

mobility.Install (nodes);

Install Applications:

• Set up a UDP echo server on one node and a UDP echo client on the other node

UdpEchoServerHelper echoServer (9);

ApplicationContainer serverApps = echoServer.Install (nodes.Get (0));

serverApps.Start (Seconds (1.0));

serverApps.Stop (Seconds (10.0));

UdpEchoClientHelper echoClient (interfaces.GetAddress (0), 9);

echoClient.SetAttribute (“MaxPackets”, UintegerValue (1));

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

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

ApplicationContainer clientApps = echoClient.Install (nodes.Get (1));

clientApps.Start (Seconds (2.0));

clientApps.Stop (Seconds (10.0));

Run the Simulation:

• Define the simulation stop time and start the simulator:

Simulator::Stop (Seconds (10.0));

Simulator::Run ();

Simulator::Destroy ();

return 0;

Example Complete Script (network-communication.cc):

Here some example scripts for implementing network communication.

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

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

#include “ns3/mobility-module.h”

#include “ns3/applications-module.h”

using namespace ns3;

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

{

  CommandLine cmd;

  cmd.Parse (argc, argv);

  NodeContainer nodes;

  nodes.Create (2); // Create 2 nodes

  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);

  MobilityHelper mobility;

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

  mobility.Install (nodes);

  UdpEchoServerHelper echoServer (9);

  ApplicationContainer serverApps = echoServer.Install (nodes.Get (0));

  serverApps.Start (Seconds (1.0));

  serverApps.Stop (Seconds (10.0));

  UdpEchoClientHelper echoClient (interfaces.GetAddress (0), 9);

  echoClient.SetAttribute (“MaxPackets”, UintegerValue (1));

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

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

  ApplicationContainer clientApps = echoClient.Install (nodes.Get (1));

  clientApps.Start (Seconds (2.0));

  clientApps.Stop (Seconds (10.0));

  Simulator::Stop (Seconds (10.0));

  Simulator::Run ();

  Simulator::Destroy ();

  return 0;

}

Explanation:

Here we have enlightened the process of network communication

1. Network Configuration:
   • Nodes are created, and a point-to-point link is set up between them.
   • The Internet stack is installed on the nodes, and IP addresses are assigned to the network devices.
2. Mobility (Optional):
   • The ConstantPositionMobilityModel is used to keep the nodes at fixed positions. This step is optional and can be modified to simulate different mobility scenarios.
3. Applications:
   • A UDP echo server application is installed on one node.
   • A UDP echo client application is installed on the other node to simulate communication.
4. Running the Simulation:
   • The simulation is run for a specified duration, and then the simulator is destroyed to clean up.

       Finally, implementing the network communication is discussed and simulated. So for any Network communication in ns-3 implementation contact us.