How to Start OSI Layer Protocol Projects Using NS3

To start an OSI Layer Protocol project using NS3 has contains to choose one or more layers of the OSI model such as physical, data link, network, transport and to execute or learning the protocols, which function on those layers. NS3 environment is modular and it supports to replicate the most OSI layers, to create it an excellent tool for such projects.

Following is a simplified procedure to start the OSI Layer Protocol Projects in NS3.

Steps to Start OSI Layer Protocol Projects in NS3

  1. Understand the OSI Model and NS3
  • OSI Model Layers:
    • Physical Layer: Signal transmission, bit encoding, and hardware specifics.
    • Data Link Layer: Framing, error detection, MAC protocols.
    • Network Layer: Routing, addressing the protocols like IPv4, IPv6.
    • Transport Layer: End-to-end interaction such as TCP, UDP.
    • Session, Presentation and Application Layers: Services including encryption, data formats, and user-facing applications.
  • NS3 Correspondence:
    • NS3 includes layers via their components:
      • Physical: Wi-Fi PHY, LTE, 5G.
      • Data Link: CSMA, Wi-Fi MAC, PPP.
      • Network: IPv4, IPv6, routing protocols.
      • Transport: TCP, UDP, SCTP.
      • Application: Custom applications, UdpEcho, and OnOff applications.
  1. Set Up NS3
  • Install NS3:
    • Go to NS3 official site to download and install NS3.
  • Verify Installation:

./waf –run scratch/test-example

  • Modules for OSI Layers:
    • Allow certain modules such as csma, wifi, internet, lte, or traffic-control if required:

./waf configure –enable-modules=wifi,csma,traffic-control

./waf build

  1. Plan Your Protocol Project
  • Select OSI Layer(s):
    • Choose which layer(s) to concentrate on like:
      • Physical Layer: Signal propagation, interference modeling.
      • Data Link Layer: Custom MAC protocols or error detection.
      • Network Layer: Routing algorithms, IP packet handling.
      • Transport Layer: TCP congestion control mechanisms.
  • Define Objectives:
    • We execute the performance evaluation, protocol comparison, or custom implementation.
  • Topology:
    • We can utilize these topologies like star, ring, mesh, or custom network topology.
  1. Write the Simulation Code
  • We able to utilize existing NS3 examples like a base and prolong them.
  • Example: Network Layer Routing

#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[]) {

// Create nodes

NodeContainer nodes;

nodes.Create(3);

// Set up point-to-point links

PointToPointHelper p2p;

p2p.SetDeviceAttribute(“DataRate”, StringValue(“10Mbps”));

p2p.SetChannelAttribute(“Delay”, StringValue(“5ms”));

NetDeviceContainer devices1 = p2p.Install(nodes.Get(0), nodes.Get(1));

NetDeviceContainer devices2 = p2p.Install(nodes.Get(1), nodes.Get(2));

// Install Internet stack

InternetStackHelper internet;

internet.Install(nodes);

// Assign IP addresses

Ipv4AddressHelper ipv4;

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

Ipv4InterfaceContainer interfaces1 = ipv4.Assign(devices1);

ipv4.SetBase(“10.1.2.0”, “255.255.255.0”);

Ipv4InterfaceContainer interfaces2 = ipv4.Assign(devices2);

// Configure routing

Ipv4GlobalRoutingHelper::PopulateRoutingTables();

// Create UDP Echo Server on Node 2

uint16_t port = 9;

UdpEchoServerHelper echoServer(port);

ApplicationContainer serverApps = echoServer.Install(nodes.Get(2));

serverApps.Start(Seconds(1.0));

serverApps.Stop(Seconds(10.0));

// Create UDP Echo Client on Node 0

UdpEchoClientHelper echoClient(Ipv4Address(“10.1.2.2”), port);

echoClient.SetAttribute(“MaxPackets”, UintegerValue(10));

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 pcap tracing

p2p.EnablePcapAll(“osi-layer-example”);

Simulator::Run();

Simulator::Destroy();

return 0;

}

  1. Customize the Protocol for Your Layer
  • Physical Layer:
    • For custom signal propagation, interference modeling, change or prolong the wireless models such as Wi-Fi PHY.
  • Data Link Layer:
    • We can prolong CsmaNetDevice or WifiMac for custom MAC protocols.
    • Insert new aspects such as collision detection or error recovery.
  • Network Layer:
    • We make custom routing by prolonging the Ipv4RoutingProtocol.
  • Transport Layer:
    • Execute new congestion control using TcpSocketBase.
  1. Test and Debug
  • Enable Logging:

export NS_LOG=UdpEchoClientApplication=level_all

./waf –run scratch/osi-layer-example

  • Packet Analysis:
    • For in-depth packet inspection within Wireshark to utilize PCAP files.
  • Protocol Debugging:
    • Insert debug statements or we utilize NS3 tracing analysing the protocol behaviors.
  1. Evaluate Performance
  • Metrics to Measure:
    • Physical Layer: Signal strength, interference, BER.
    • Data Link Layer: Collision rate, throughput, retransmissions.
    • Network Layer: Packet delivery ratio, routing overhead.
    • Transport Layer: Latency, throughput, congestion control efficiency.
  • For performance evaluation, we can utilize tools such as FlowMonitor:

FlowMonitorHelper flowMonitor;

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

  1. Advanced Features
  • Cross-Layer Interaction:
    • We mimic dependencies among the layers such as transport layer adjusting to physical link conditions.
  • Scalability Testing:
    • Experiment the protocol in large-scale situations.
  • Security Features:
    • We execute the encryption (presentation layer) or secure routing (network layer).
  1. Document and Visualize
  • Document Implementation:
    • It provides hypotheses, simulation metrics, and outcomes.
  • Visualize Results:
    • To envision the traffic to utilize NetAnim.
    • For graphing the performance parameters, utilize tools such as Matplotlib or Gnuplot.

Through the above guide, you can obtain and learn how to start and simulate the OSI Layer Protocol Projects including sample snippets by using NS3 tool. We will also include their modern strategies for future enhancements.

To advance your OSI Layer Protocol Projects utilizing the NS3 tool, consider leveraging the expertise offered by the team at phdprojects.org, who are prepared to support you throughout each stage of the process. Take advantage of our tailored assistance, which guarantees the best possible project results and adherence to deadlines. Our developers are available to enhance your project performance, as well as to assist with Quagga or the execution and understanding of the protocols. Please feel free to contact us for further guidance.