How to Begin Implementing an Ad Hoc Networks in NS3

To begin executing an Ad Hoc Network project in NS3, that needs to replicate a wireless network in which nodes are directly interact devoid of depending on a central infrastructure like routers or base stations. Here’s a comprehensive method to get started:

Steps to Begin Implementing an Ad Hoc Networks Projects in NS3

1. Understand Ad Hoc Networks

Ad Hoc Networks are typified by:

• Decentralization: It has no fixed infrastructure; nodes are performs like routers.
• Dynamic Topology: Nodes could dynamically connect, exit, or transfer.
• Protocols: Routing protocols like AODV, OLSR, or DSDV are utilized.

2. Define Project Objectives

Focus on the project’s goals of Ad Hoc Network:

• Replicate the basic interaction among nodes.
• Focus on performance parameters such as throughput, delay, and packet delivery ratio.
• Execute and measure the routing protocols in terms of AODV, OLSR, or DSDV.
• Examine impact on mobility network performance.

3. Install and Set Up NS3

• We should set up NS3 environment on the system.
• Learn about the Ad Hoc routing components in NS3:
  • DSDV (Destination-Sequenced Distance Vector): Table-driven routing.
  • AODV (Ad hoc On-Demand Distance Vector): Reactive routing.
  • OLSR (Optimized Link State Routing): Proactive routing.

4. Design the Ad Hoc Network

Key Components:

1. Nodes: It denotes mobile devices within the network.
2. Routing Protocol: Make use of NS3 Ad Hoc routing component.
3. Mobility Model: Replicate the node movement.
4. Traffic Patterns: Describe interaction among the nodes.

5. Implement the Simulation

Step A: Create Ad Hoc Nodes

Describe the amount of Ad Hoc nodes.

NodeContainer adHocNodes;

adHocNodes.Create(10); // 10 Ad Hoc nodes

Step B: Install the Internet Stack with Routing

Allow Ad Hoc routing protocols such as AODV, OLSR, or DSDV.

InternetStackHelper internet;

AodvHelper aodv;

internet.SetRoutingHelper(aodv); // Set AODV as the routing protocol

internet.Install(adHocNodes);

Step C: Configure Wireless Devices

Configure WiFi for wireless interaction.

WifiHelper wifi;

wifi.SetStandard(WIFI_STANDARD_80211g);

YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default();

YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default();

wifiPhy.SetChannel(wifiChannel.Create());

WifiMacHelper wifiMac;

wifiMac.SetType(“ns3::AdhocWifiMac”);

NetDeviceContainer devices = wifi.Install(wifiPhy, wifiMac, adHocNodes);

Step D: Assign IP Addresses

Allocate inimitable IP addresses to the nodes.

Ipv4AddressHelper ipv4;

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

Ipv4InterfaceContainer interfaces = ipv4.Assign(devices);

Step E: Define Node Mobility

Mimic node mobility to leverage a movement pattern.

MobilityHelper mobility;

mobility.SetMobilityModel(“ns3::RandomWaypointMobilityModel”,

“Speed”, StringValue(“ns3::UniformRandomVariable[Min=1.0|Max=5.0]”),

“Pause”, StringValue(“ns3::ConstantRandomVariable[Constant=2.0]”),

“PositionAllocator”, StringValue(“ns3::RandomBoxPositionAllocator”));

mobility.Install(adHocNodes);

6. Add Traffic Applications

1. Source Application (On-Off Traffic):
   • Replicate the interaction among nodes.

OnOffHelper onOff(“ns3::UdpSocketFactory”, InetSocketAddress(interfaces.GetAddress(1), 9));

onOff.SetAttribute(“DataRate”, StringValue(“2Mbps”));

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

ApplicationContainer sourceApp = onOff.Install(adHocNodes.Get(0)); // Node 0 is the source

sourceApp.Start(Seconds(1.0));

sourceApp.Stop(Seconds(10.0));

1. Sink Application:
   • We can set up a PacketSink on the end node for receiving traffic.

PacketSinkHelper packetSink(“ns3::UdpSocketFactory”, InetSocketAddress(Ipv4Address::GetAny(), 9));

ApplicationContainer sinkApp = packetSink.Install(adHocNodes.Get(1)); // Node 1 is the sink

sinkApp.Start(Seconds(1.0));

sinkApp.Stop(Seconds(10.0));

7. Configure Simulation Parameters

Configure simulation time and then run it.

Simulator::Stop(Seconds(15.0));

Simulator::Run();

Simulator::Destroy();

8. Evaluate Performance

• Metrics:
  • Estimate the performance of throughput, delay, packet delivery ratio, and energy utilization.
• Visualization:
  • For real-time visualization, we need to leverage NetAnim.
  • Transfer outcomes to external tools such as Python or MATLAB toolsfor analysis.

9. Advanced Features

1. Multi-Hop Communication:
   • Maximize the distance among the nodes to apply multi-hop routing.
2. Performance Analysis:
   • Equate the various routing protocols such as AODV vs. OLSR.
3. Energy Models:
   • Mimic energy utilization of nodes with the support of EnergyModel.
4. Mobility Patterns:
   • Test with various mobility patters such as Gauss-Markov or Random Walk.

Sample Complete Code Framework

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/wifi-module.h”

#include “ns3/mobility-module.h”

#include “ns3/applications-module.h”

using namespace ns3;

int main() {

// Create Ad Hoc Nodes

NodeContainer adHocNodes;

adHocNodes.Create(10);

// Install Internet Stack with AODV Routing

InternetStackHelper internet;

AodvHelper aodv;

internet.SetRoutingHelper(aodv);

internet.Install(adHocNodes);

// Configure WiFi Devices

WifiHelper wifi;

wifi.SetStandard(WIFI_STANDARD_80211g);

YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default();

YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default();

wifiPhy.SetChannel(wifiChannel.Create());

WifiMacHelper wifiMac;

wifiMac.SetType(“ns3::AdhocWifiMac”);

NetDeviceContainer devices = wifi.Install(wifiPhy, wifiMac, adHocNodes);

// Assign IP Addresses

Ipv4AddressHelper ipv4;

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

Ipv4InterfaceContainer interfaces = ipv4.Assign(devices);

// Configure Mobility

MobilityHelper mobility;

mobility.SetMobilityModel(“ns3::RandomWaypointMobilityModel”,

“Speed”, StringValue(“ns3::UniformRandomVariable[Min=1.0|Max=5.0]”),

“Pause”, StringValue(“ns3::ConstantRandomVariable[Constant=2.0]”),

“PositionAllocator”, StringValue(“ns3::RandomBoxPositionAllocator”));

mobility.Install(adHocNodes);

// Install Traffic Applications

OnOffHelper onOff(“ns3::UdpSocketFactory”, InetSocketAddress(interfaces.GetAddress(1), 9));

onOff.SetAttribute(“DataRate”, StringValue(“2Mbps”));

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

ApplicationContainer sourceApp = onOff.Install(adHocNodes.Get(0));

sourceApp.Start(Seconds(1.0));

sourceApp.Stop(Seconds(10.0));

PacketSinkHelper packetSink(“ns3::UdpSocketFactory”, InetSocketAddress(Ipv4Address::GetAny(), 9));

ApplicationContainer sinkApp = packetSink.Install(adHocNodes.Get(1));

sinkApp.Start(Seconds(1.0));

sinkApp.Stop(Seconds(10.0));

// Run Simulation

Simulator::Stop(Seconds(15.0));

Simulator::Run();

Simulator::Destroy();

return 0;

}

This step-by-step approach ensures a solid foundation for implementing and analysing the Adhoc Networks Projects using NS3 environment. Start with a basic setup, and gradually add estimation and advanced features as your project evolves. More details will be offered on this subject in upcoming manual.