To implement the network waveform in ns3 has to include generating the custom waveform to emulate the interaction among nodes or utilize the existing one to stimulate. Here the below is the procedure on how to implement the Network waveform in ns3:
Step-by-Step Implementation:
Step 1: Set Up the ns3 Environment
- Install ns3: Make sure ns3 is installed in the computer.
sudo apt-get update
sudo apt-get install ns3
Create a New ns3 Project: Create a directory for your new project within the ns3 workspace.
cd ns-3
mkdir scratch/network-waveform
Step 2: Understand Existing Waveform Models
ns3 comes with numerous predefined waveform models like WiFi, LTE, and others. These models can be used as a reference to executed with own waveform. The key components of a waveform model contain:
- PHY Layer (Physical Layer): Handles modulation, coding, and transmission.
- MAC Layer (Medium Access Control Layer): Handles channel access, error detection, and framing.
- Channel Model: Models the wireless channel characteristics like path loss, fading, and interference.
Step 3: Create a Custom Waveform Model
To implement a custom waveform, we usually required to generate new classes for the PHY, MAC, and possibly a new channel model. Here, we provide the simple on how we might create a custom waveform:
- Create the PHY Layer: Create a new PHY layer class. For example, CustomPhy.
// CustomPhy.h
#ifndef CUSTOM_PHY_H
#define CUSTOM_PHY_H
#include “ns3/wifi-phy.h”
namespace ns3 {
class CustomPhy : public WifiPhy {
public:
static TypeId GetTypeId (void);
CustomPhy ();
virtual ~CustomPhy ();
// Add custom methods and attributes here
};
} // namespace ns3
#endif // CUSTOM_PHY_H
// CustomPhy.cc
#include “CustomPhy.h”
#include “ns3/log.h”
namespace ns3 {
NS_LOG_COMPONENT_DEFINE (“CustomPhy”);
TypeId CustomPhy::GetTypeId (void) {
static TypeId tid = TypeId (“ns3::CustomPhy”)
.SetParent<WifiPhy> ()
.SetGroupName (“Custom”)
.AddConstructor<CustomPhy> ();
return tid;
}
CustomPhy::CustomPhy () {
NS_LOG_FUNCTION (this);
}
CustomPhy::~CustomPhy () {
NS_LOG_FUNCTION (this);
}
} // namespace ns3
Create the MAC Layer: Create a new MAC layer class. For example, CustomMac.
// CustomMac.h
#ifndef CUSTOM_MAC_H
#define CUSTOM_MAC_H
#include “ns3/wifi-mac.h”
namespace ns3 {
class CustomMac : public WifiMac {
public:
static TypeId GetTypeId (void);
CustomMac ();
virtual ~CustomMac ();
// Add custom methods and attributes here
};
} // namespace ns3
#endif // CUSTOM_MAC_H
// CustomMac.cc
#include “CustomMac.h”
#include “ns3/log.h”
namespace ns3 {
NS_LOG_COMPONENT_DEFINE (“CustomMac”);
TypeId CustomMac::GetTypeId (void) {
static TypeId tid = TypeId (“ns3::CustomMac”)
.SetParent<WifiMac> ()
.SetGroupName (“Custom”)
.AddConstructor<CustomMac> ();
return tid;
}
CustomMac::CustomMac () {
NS_LOG_FUNCTION (this);
}
CustomMac::~CustomMac () {
NS_LOG_FUNCTION (this);
}
} // namespace ns3
Integrate the PHY and MAC Layers: Create a helper class to integrate the PHY and MAC layers.
// CustomHelper.h
#ifndef CUSTOM_HELPER_H
#define CUSTOM_HELPER_H
#include “ns3/net-device.h”
#include “ns3/node-container.h”
#include “ns3/phy-layer.h”
#include “ns3/mac-layer.h”
namespace ns3 {
class CustomHelper {
public:
CustomHelper ();
virtual ~CustomHelper ();
NetDeviceContainer Install (NodeContainer nodes);
};
} // namespace ns3
#endif // CUSTOM_HELPER_H
// CustomHelper.cc
#include “CustomHelper.h”
#include “ns3/log.h”
#include “ns3/CustomPhy.h”
#include “ns3/CustomMac.h”
#include “ns3/net-device.h”
#include “ns3/wifi-net-device.h”
#include “ns3/mobility-helper.h”
#include “ns3/internet-stack-helper.h”
#include “ns3/ipv4-address-helper.h”
namespace ns3 {
NS_LOG_COMPONENT_DEFINE (“CustomHelper”);
CustomHelper::CustomHelper () {
NS_LOG_FUNCTION (this);
}
CustomHelper::~CustomHelper () {
NS_LOG_FUNCTION (this);
}
NetDeviceContainer CustomHelper::Install (NodeContainer nodes) {
NetDeviceContainer devices;
for (NodeContainer::Iterator i = nodes.Begin (); i != nodes.End (); ++i) {
Ptr<Node> node = *i;
Ptr<CustomPhy> phy = CreateObject<CustomPhy> ();
Ptr<CustomMac> mac = CreateObject<CustomMac> ();
Ptr<WifiNetDevice> device = CreateObject<WifiNetDevice> ();
device->SetPhy (phy);
device->SetMac (mac);
node->AddDevice (device);
devices.Add (device);
}
return devices;
}
} // namespace ns3
Step 4: Create a Simulation Script
- Create a new simulation script in your scratch directory:
// network-waveform.cc
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/point-to-point-module.h”
#include “ns3/mobility-helper.h”
#include “ns3/ipv4-address-helper.h”
#include “CustomHelper.h”
using namespace ns3;
NS_LOG_COMPONENT_DEFINE (“NetworkWaveform”);
int main (int argc, char *argv[]) {
CommandLine cmd;
cmd.Parse (argc, argv);
NodeContainer nodes;
nodes.Create (2);
MobilityHelper mobility;
mobility.SetPositionAllocator (“ns3::GridPositionAllocator”,
“MinX”, DoubleValue (0.0),
“MinY”, DoubleValue (0.0),
“DeltaX”, DoubleValue (5.0),
“DeltaY”, DoubleValue (10.0),
“GridWidth”, UintegerValue (2),
“LayoutType”, StringValue (“RowFirst”));
mobility.SetMobilityModel (“ns3::ConstantPositionMobilityModel”);
mobility.Install (nodes);
CustomHelper customHelper;
NetDeviceContainer devices = customHelper.Install (nodes);
InternetStackHelper stack;
stack.Install (nodes);
Ipv4AddressHelper address;
address.SetBase (“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer interfaces = address.Assign (devices);
UdpEchoServerHelper echoServer (9);
ApplicationContainer serverApps = echoServer.Install (nodes.Get (1));
serverApps.Start (Seconds (1.0));
serverApps.Stop (Seconds (10.0));
UdpEchoClientHelper echoClient (interfaces.GetAddress (1), 9);
echoClient.SetAttribute (“MaxPackets”, UintegerValue (1));
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));
Simulator::Run ();
Simulator::Destroy ();
return 0;
}
Compile the Script: Compile your script using the waf build system.
./waf build
Run the Simulation: Run your simulation script and observe the results.
./waf –run scratch/network-waveform
Step 5: Enable Tracing and Analyze Results
- Enable Tracing: Add tracing to collect data for analysis.
AsciiTraceHelper ascii;
customHelper.EnableAsciiAll (ascii.CreateFileStream (“network-waveform.tr”));
Run the Simulation: Set the simulation stop time and run it.
Simulator::Stop (Seconds (10.0));
Simulator::Run ();
Simulator::Destroy ();
As we discussed earlier about how the network waveform will perform in ns3 tool and we help to deliver more information about how the network waveform will adapt in different implementation tools.
Find project suggestions and performance evaluations associated with Network Waveform in the ns3 tool. Our team creates custom waveforms to simulate node interactions specific to your projects. Share your research details with us for further guidance.