How to Begin Implementing a Network Communication in ns3

To create a Network Communication project in ns-3 has includes the replicate a different features for network structure, protocols and communication designs. Below is a comprehensive guide to help you start your project:

Steps to Begin Implementing a Network Communication projects using ns3

Step 1: Understand the Project Scope

Identify the Network Type:
- Wired: It is a kind of wired networks they are Ethernet, optical networks, etc.
- Wireless: It is a category of wireless networks they are WiFi, LTE, 5G, MANETs, etc.
Define Communication Goals:
- Performance metrics: It aims for improve the parameter metrices throughput, latency, jitter, packet loss.
- Application layer protocols: It considers the protocol for HTTP, FTP, and VoIP.
- Routing protocols: The routing protocol contains the AODV, OSPF, etc.
Choose the Simulation Environment:
- The ns-3 tool components are needed for sample internet, mobility, WiFi, LTE.

Step 2: Install ns-3 and Required Modules

Download ns-3:
- Go to the latest version from the ns-3 official website.
Configure Required Modules:
- Ensure the components like as internet, mobility, and the detailed the protocols we need to replicate:

./waf configure –enable-modules=internet,mobility,wifi,lte

./waf build

Verify Installation:
- It process for the sample scripts:

./waf –run simple-point-to-point

./waf –run wifi-simple-infra

Step 3: Set Up the Network Topology

Create Nodes:
- Nodes are signify the network devices:

NodeContainer nodes;

nodes.Create(4); // Create 4 nodes

Set Up Links:
- Use the configure connection for Point-to-Point (wired) or WiFi (wireless) connection:

PointToPointHelper p2p;

p2p.SetDeviceAttribute(“DataRate”, StringValue(“1Gbps”));

p2p.SetChannelAttribute(“Delay”, StringValue(“2ms”));

NetDeviceContainer devices = p2p.Install(nodes.Get(0), nodes.Get(1));

Step 4: Configure Network Stack

Install Internet Protocol Stack:
- Enhance the TCP/IP stack for the nodes:

InternetStackHelper internet;

internet.Install(nodes);

Assign IP Addresses:
- It configure the IP addressing for communication:

Ipv4AddressHelper ipv4;

ipv4.SetBase(“10.1.1.0”, “255.255.255.0”);

Ipv4InterfaceContainer interfaces = ipv4.Assign(devices);

Step 5: Add Traffic Generators

Install Applications:
- Intended for client-server communication, use the congestion applications such as OnOff or PacketSink:

uint16_t port = 9;

Address serverAddress(InetSocketAddress(interfaces.GetAddress(1), port));

PacketSinkHelper sink(“ns3::TcpSocketFactory”, serverAddress);

ApplicationContainer sinkApp = sink.Install(nodes.Get(1));

sinkApp.Start(Seconds(1.0));

sinkApp.Stop(Seconds(10.0));

OnOffHelper onOff(“ns3::TcpSocketFactory”, serverAddress);

onOff.SetAttribute(“DataRate”, StringValue(“500Kbps”));

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

clientApp.Start(Seconds(2.0));

clientApp.Stop(Seconds(10.0));

Custom Applications:
- Write custom application logic for require through encompassing the Application.

Step 6: Enable Tracing and Monitoring

Enable ASCII or PCAP Tracing:

AsciiTraceHelper ascii;

p2p.EnableAsciiAll(ascii.CreateFileStream(“network.tr”));

p2p.EnablePcapAll(“network”);

Use FlowMonitor:
- We gather the specific statistics:

FlowMonitorHelper flowMonitor;

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

Step 7: Run the Simulation

Schedule Simulation:
- Describe the replication of duration and open it:

Simulator::Stop(Seconds(10.0));

Simulator::Run();

Simulator::Destroy();

Analyze Results:
- We use the trace files or FlowMonitor for performance analysis the results.

Step 8: Example Script for a Basic Network

Here is a basic sample of a point-to-point network by TCP 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/applications-module.h”

using namespace ns3;

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

CommandLine cmd;

cmd.Parse(argc, argv);