How to Implement Massive Channel Access in ns3

To implement massive channel access in ns3, we need to simulate a scenario. In that we have to access the communication channel for a large number of devices (such as IoT devices) simultaneously. For this, process the network has to be configure to handle high-density traffic and have the ability to manage efficiently medium access control (MAC) layer.

The following steps will guide on how to implement Massive Channel Access in ns3.

step-by-step guide on implementing this scenario in ns3:

Step 1: Install ns3

Make sure that ns3 is installed on the system

Step 2: Set Up the Simulation Environment

Create a new simulation script or modify an existing one. This script will define the network topology, nodes, mobility models, and communication protocols.

Step 3: Define Network Topology

Create nodes and define the network topology, focusing on a high-density scenario. Here’s an example of setting up a basic high-density network with massive channel access.

#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”

#include “ns3/flow-monitor-module.h”

using namespace ns3;

NS_LOG_COMPONENT_DEFINE (“MassiveChannelAccessExample”);

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

{

// Enable logging

LogComponentEnable (“MassiveChannelAccessExample”, LOG_LEVEL_INFO);

// Set the number of nodes

uint32_t numNodes = 1000;

// Create nodes

NodeContainer nodes;

nodes.Create (numNodes);

// Set up Wi-Fi

WifiHelper wifi;

wifi.SetStandard (WIFI_PHY_STANDARD_80211ac);

YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default ();

YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default ();

wifiPhy.SetChannel (wifiChannel.Create ());

WifiMacHelper wifiMac;

wifiMac.SetType (“ns3::AdhocWifiMac”);

NetDeviceContainer devices;

devices = wifi.Install (wifiPhy, wifiMac, nodes);

// Install Internet stack

InternetStackHelper internet;

internet.Install (nodes);

// Assign IP addresses

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces = address.Assign (devices);

// Set up mobility model

MobilityHelper mobility;

mobility.SetPositionAllocator (“ns3::RandomBoxPositionAllocator”,

“X”, StringValue (“ns3::UniformRandomVariable[Min=0.0|Max=100.0]”),

“Y”, StringValue (“ns3::UniformRandomVariable[Min=0.0|Max=100.0]”),

“Z”, StringValue (“ns3::UniformRandomVariable[Min=0.0|Max=50.0]”));

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

mobility.Install (nodes);

// Install and start applications on nodes

uint16_t port = 8080;

Address serverAddress (InetSocketAddress (interfaces.GetAddress (0), port));

// Install server application on the first node

UdpServerHelper server (port);

ApplicationContainer serverApp = server.Install (nodes.Get (0));

serverApp.Start (Seconds (1.0));

serverApp.Stop (Seconds (10.0));

// Install client applications on all other nodes

UdpClientHelper client (serverAddress);

client.SetAttribute (“MaxPackets”, UintegerValue (1000));

client.SetAttribute (“Interval”, TimeValue (MilliSeconds (10)));

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

ApplicationContainer clientApps;

for (uint32_t i = 1; i < nodes.GetN (); ++i)

{

clientApps.Add (client.Install (nodes.Get (i)));

}

clientApps.Start (Seconds (2.0));

clientApps.Stop (Seconds (10.0));

// Set up FlowMonitor

FlowMonitorHelper flowmon;

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

// Run the simulation

Simulator::Stop (Seconds (10.0));

Simulator::Run ();

// Print statistics

monitor->CheckForLostPackets ();

Ptr<Ipv4FlowClassifier>classifier=DynamicCast<Ipv4FlowClassifier> (flowmon.GetClassifier ());

std::map<FlowId, FlowMonitor::FlowStats> stats = monitor->GetFlowStats ();

for (std::map<FlowId, FlowMonitor::FlowStats>::const_iterator i = stats.begin (); i != stats.end (); ++i)

{

Ipv4FlowClassifier::FiveTuple t = classifier->FindFlow (i->first);

NS_LOG_UNCOND (“Flow ” << i->first << ” (” << t.sourceAddress << ” -> ” << t.destinationAddress << “)”);

NS_LOG_UNCOND (”  Tx Packets: ” << i->second.txPackets);

NS_LOG_UNCOND (”  Tx Bytes:   ” << i->second.txBytes);

NS_LOG_UNCOND (”  Rx Packets: ” << i->second.rxPackets);

NS_LOG_UNCOND (”  Rx Bytes:   ” << i->second.rxBytes);

NS_LOG_UNCOND (”  Throughput: ” << i->second.rxBytes * 8.0 / (i->second.timeLastRxPacket.GetSeconds () – i->second.timeFirstTxPacket.GetSeconds ()) / 1024 / 1024  << ” Mbps”);

}

// Clean up

Simulator::Destroy ();

return 0;

}

Step 4: Set Up Mobility Models

In the example, the RandomBoxPositionAllocator is used to place nodes randomly within a 3D box. The ConstantPositionMobilityModel is used to keep the nodes stationary during the simulation. Adjust the mobility models and parameters as needed for your specific use case.

Step 5: Set Up Traffic Generation

We set up a UDP server on one of the nodes and UDP clients on all other nodes to generate traffic. The traffic configuration can be adjusted to simulate different types of communication.

Step 6: Run the Simulation

Compile and run your simulation script to see the effect of massive channel access on network performance. The output will include statistics such as the number of packets transmitted and received, throughput, and any packet loss.

From the given above example and steps we can understand the concept of implementing Massive Channel Access in ns3 by setting up the simulation environment, mobility models, traffic generation using UDP server we can run the simulation.

Our team has expertise in all facets of Massive Channel Access in ns3tool. If you need guidance, don’t hesitate to contact us. We offer thorough networking comparison analysis and ensure optimal simulation results. Our experts are skilled in configuring high-density traffic management.