How to Implement Radio Resource Allocation in ns3

To implement the radio resource allocation in ns3 has encompasses to handle the allocation of radio resources like frequency channels, transmission power, and time slots to various nodes or users in a network.

The given below is the complete procedure on how to setup a basic radio resource allocation mechanism in ns3:

Step-by-step Implementation:

Step 1: Set up Your ns3 Environment

Make sure ns3 is installed in the computer.

Step 2: Create a New Simulation Script

Create a new simulation script in the scratch directory of your ns-3 installation. For example, create a file named radio_resource_allocation.cc.

Step 3: Include Necessary Headers

Include the necessary ns3 headers at the beginning of your script. Here’s an example:

#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/spectrum-module.h”

#include “ns3/spectrum-channel.h”

using namespace ns3;

Step 4: Define Command-Line Arguments for Parameterization

Use the CommandLine class to define parameters that can be set through the command line.

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

{

uint32_t numNodes = 10;

double simTime = 10.0;

CommandLine cmd;

cmd.AddValue(“numNodes”, “Number of nodes”, numNodes);

cmd.AddValue(“simTime”, “Simulation time (seconds)”, simTime);

cmd.Parse(argc, argv);

NodeContainer nodes;

nodes.Create(numNodes);

YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default();

YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default();

Ptr<SpectrumChannel> spectrumChannel = wifiChannel.Create()->GetObject<SpectrumChannel>();

wifiPhy.SetChannel(spectrumChannel);

WifiHelper wifi;

wifi.SetStandard(WIFI_STANDARD_80211n);

WifiMacHelper wifiMac;

wifiMac.SetType(“ns3::AdhocWifiMac”);

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

MobilityHelper mobility;

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

mobility.Install(nodes);

InternetStackHelper stack;

stack.Install(nodes);

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces = address.Assign(devices);

// Install applications

uint16_t port = 9;

OnOffHelper onoff(“ns3::UdpSocketFactory”, Address(InetSocketAddress(interfaces.GetAddress(numNodes-1), port)));

onoff.SetConstantRate(DataRate(“500kbps”));

ApplicationContainer apps = onoff.Install(nodes.Get(0));

apps.Start(Seconds(1.0));

apps.Stop(Seconds(simTime));

PacketSinkHelper sink(“ns3::UdpSocketFactory”, Address(InetSocketAddress(Ipv4Address::GetAny(), port)));

apps = sink.Install(nodes.Get(numNodes-1));

apps.Start(Seconds(0.0));

apps.Stop(Seconds(simTime));

Simulator::Stop(Seconds(simTime));

Simulator::Run();

Simulator::Destroy();

return 0;

}

Step 5: Implement Radio Resource Allocation Logic

Implement the radio resource allocation logic. This can involve dynamic channel allocation, power control, and scheduling. For simplicity, we will focus on channel allocation.

class RadioResourceAllocationApp : public Application

{

public:

RadioResourceAllocationApp();

virtual ~RadioResourceAllocationApp();

void Setup(Ptr<WifiNetDevice> device, Ptr<SpectrumChannel> channel);

private:

virtual void StartApplication() override;

virtual void StopApplication() override;

void AllocateResources();

Ptr<WifiNetDevice> m_device;

Ptr<SpectrumChannel> m_channel;

EventId m_allocationEvent;

};

RadioResourceAllocationApp::RadioResourceAllocationApp() {}

RadioResourceAllocationApp::~RadioResourceAllocationApp() {}

void RadioResourceAllocationApp::Setup(Ptr<WifiNetDevice> device, Ptr<SpectrumChannel> channel)

{

m_device = device;

m_channel = channel;

}

void RadioResourceAllocationApp::StartApplication()

{

AllocateResources();

}

void RadioResourceAllocationApp::StopApplication()

{

if (m_allocationEvent.IsRunning())

{

Simulator::Cancel(m_allocationEvent);

}

}

void RadioResourceAllocationApp::AllocateResources()

{

// Implement resource allocation logic here

// For example, allocate different channels to different nodes

NS_LOG_UNCOND(“Allocating radio resources”);

// Schedule the next resource allocation

m_allocationEvent = Simulator::Schedule(Seconds(1.0), &RadioResourceAllocationApp::AllocateResources, this);

}

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

{

uint32_t numNodes = 10;

double simTime = 10.0;

CommandLine cmd;

cmd.AddValue(“numNodes”, “Number of nodes”, numNodes);

cmd.AddValue(“simTime”, “Simulation time (seconds)”, simTime);

cmd.Parse(argc, argv);

NodeContainer nodes;

nodes.Create(numNodes);

YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default();

YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default();

Ptr<SpectrumChannel> spectrumChannel = wifiChannel.Create()->GetObject<SpectrumChannel>();

wifiPhy.SetChannel(spectrumChannel);

WifiHelper wifi;

wifi.SetStandard(WIFI_STANDARD_80211n);

WifiMacHelper wifiMac;

wifiMac.SetType(“ns3::AdhocWifiMac”);

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

MobilityHelper mobility;

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

mobility.Install(nodes);

InternetStackHelper stack;

stack.Install(nodes);

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces = address.Assign(devices);

// Create and setup RadioResourceAllocationApp on each node

for (uint32_t i = 0; i < numNodes; ++i)

{

Ptr<RadioResourceAllocationApp> app = CreateObject<RadioResourceAllocationApp>();

app->Setup(devices.Get(i)->GetObject<WifiNetDevice>(), spectrumChannel);

nodes.Get(i)->AddApplication(app);

app->SetStartTime(Seconds(0.0));

app->SetStopTime(Seconds(simTime));

}

// Install applications

uint16_t port = 9;

OnOffHelper onoff(“ns3::UdpSocketFactory”, Address(InetSocketAddress(interfaces.GetAddress(numNodes-1), port)));

onoff.SetConstantRate(DataRate(“500kbps”));

ApplicationContainer apps = onoff.Install(nodes.Get(0));

apps.Start(Seconds(1.0));

apps.Stop(Seconds(simTime));

PacketSinkHelper sink(“ns3::UdpSocketFactory”, Address(InetSocketAddress(Ipv4Address::GetAny(), port)));

apps = sink.Install(nodes.Get(numNodes-1));

apps.Start(Seconds(0.0));

apps.Stop(Seconds(simTime));

Simulator::Stop(Seconds(simTime));

Simulator::Run();

Simulator::Destroy();

return 0;

}

Step 6: Compile and Run Your Simulation

Compile your simulation script using waf:

./waf configure

./waf build

./waf –run scratch/radio_resource_allocation

Step 7: Analyze the Output

Analyze the log output to ensure that radio resources are being allocated. The AllocateResources function will output the allocation process.

As a final point, we discussed about how to implement and process the radio resource allocation in ns3 simulation tool clearly.

Project performance on Radio Resource Allocation in ns3tool are carried out by us , so if you face any difficulties then reach out to ns3simuation.com