To implement the network channel characterization in ns3 has needs to simulate the network scenario then configure the wireless channel features and gather the performance metrics to evaluate the channel behaviour.
Our team of professionals will handle the implementation of Network Channel Characterization in the ns3tool. If you encounter any difficulties following the steps mentioned below, please do not hesitate to seek assistance from us.
The below are the detailed features to help you complete the implementation process through ns3:
Step-by-Step Implementation:
Step 1: Install ns3
Make sure ns3 is installed in 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, and communication channels.
Step 3: Define Network Topology
Generate nodes and describe the network topology. For illustration, we can set up a wireless network with multiple nodes:
#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 (“NetworkChannelCharacterization”);
int main (int argc, char *argv[])
{
// Log component
LogComponentEnable (“NetworkChannelCharacterization”, LOG_LEVEL_INFO);
// Create nodes
NodeContainer wifiNodes;
wifiNodes.Create (10); // Example with 10 nodes
// Set up WiFi PHY and MAC
WifiHelper wifi;
wifi.SetStandard (WIFI_PHY_STANDARD_80211a);
YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default ();
YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default ();
wifiPhy.SetChannel (wifiChannel.Create ());
WifiMacHelper wifiMac;
wifiMac.SetType (“ns3::AdhocWifiMac”);
NetDeviceContainer wifiDevices;
wifiDevices = wifi.Install (wifiPhy, wifiMac, wifiNodes);
// Set mobility model
MobilityHelper mobility;
mobility.SetPositionAllocator (“ns3::GridPositionAllocator”,
“MinX”, DoubleValue (0.0),
“MinY”, DoubleValue (0.0),
“DeltaX”, DoubleValue (5.0),
“DeltaY”, DoubleValue (10.0),
“GridWidth”, UintegerValue (5),
“LayoutType”, StringValue (“RowFirst”));
mobility.SetMobilityModel (“ns3::ConstantPositionMobilityModel”);
mobility.Install (wifiNodes);
// Install Internet stack
InternetStackHelper stack;
stack.Install (wifiNodes);
// Assign IP addresses
Ipv4AddressHelper address;
address.SetBase (“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer wifiInterfaces;
wifiInterfaces = address.Assign (wifiDevices);
// Create and install applications
UdpEchoServerHelper echoServer (9);
ApplicationContainer serverApps = echoServer.Install (wifiNodes.Get (0));
serverApps.Start (Seconds (1.0));
serverApps.Stop (Seconds (10.0));
UdpEchoClientHelper echoClient (wifiInterfaces.GetAddress (0), 9);
echoClient.SetAttribute (“MaxPackets”, UintegerValue (1));
echoClient.SetAttribute (“Interval”, TimeValue (Seconds (1.0)));
echoClient.SetAttribute (“PacketSize”, UintegerValue (1024));
ApplicationContainer clientApps = echoClient.Install (wifiNodes.Get (1));
clientApps.Start (Seconds (2.0));
clientApps.Stop (Seconds (10.0));
// Set up FlowMonitor
FlowMonitorHelper flowmon;
Ptr<FlowMonitor> monitor = flowmon.InstallAll ();
// Set up 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 / 9.0 / 1024 / 1024 << ” Mbps”);
}
Simulator::Destroy ();
return 0;
}
Step 4: Configure Channel Characteristics
To characterize the network channel, we need to configure numerous propagation models and parameters:
4.1 Propagation Loss Models
Configure different propagation loss models to characterize the channel:
wifiChannel.AddPropagationLoss (“ns3::LogDistancePropagationLossModel”);
wifiChannel.AddPropagationLoss (“ns3::NakagamiPropagationLossModel”);
wifiChannel.SetPropagationDelay (“ns3::ConstantSpeedPropagationDelayModel”);
4.2 Propagation Delay Models
Set the propagation delay model:
wifiChannel.SetPropagationDelay (“ns3::ConstantSpeedPropagationDelayModel”);
Step 5: Monitor Channel Performance
Use FlowMonitor and other tracing mechanisms to monitor the performance metrics of the channel:
// Set up FlowMonitor
FlowMonitorHelper flowmon;
Ptr<FlowMonitor> monitor = flowmon.InstallAll ();
// Set up 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 / 9.0 / 1024 / 1024 << ” Mbps”);
}
Step 6: Run the Simulation
Compile and run your simulation script to see the effect of different channel characteristics on network performance.
As we discussed earlier about how the network channel characterization will simulate the network scenario and gather the performance metrics to estimate the channel using the ns3 tool. If you need additional details about how to implement the network channel characterization we will provide and deliver.