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How to Implement Energy Aware Resource Allocation in ns3

To implement the energy-aware resource allocation in ns3, we have to set up simulation that contains nodes that should be able to manage their energy resources efficiently and to enhance energy consumption we have to alter the communication behaviour.

Here, we provide the step-by-step implementation on how to implement energy aware resource allocation:

Step-by-Step Implementation:

Step 1: Setup ns3 Environment

Make sure you have installed ns3 on your computer.

Step 2: Define Energy Model

Simulate the energy consumption, we can use ns3’s EnergyModule. As per the perferences, we can also customize energy sources and consumption models.

Step 3: Create the Simulation Script

  1. Include Necessary Modules: Certify your script includes the necessary ns3 modules:

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/mobility-module.h”

#include “ns3/wifi-module.h”

#include “ns3/internet-module.h”

#include “ns3/applications-module.h”

#include “ns3/energy-module.h”

Setup Nodes and Network:

using namespace ns3;

NS_LOG_COMPONENT_DEFINE (“EnergyAwareResourceAllocation”);

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

{

// Create nodes

NodeContainer nodes;

nodes.Create (10); // Create 10 nodes

// Set up Wi-Fi

WifiHelper wifi;

wifi.SetStandard (WIFI_PHY_STANDARD_80211n_2_4GHZ);

YansWifiPhyHelper phy = YansWifiPhyHelper::Default ();

YansWifiChannelHelper channel = YansWifiChannelHelper::Default ();

phy.SetChannel (channel.Create ());

WifiMacHelper mac;

Ssid ssid = Ssid (“ns-3-ssid”);

mac.SetType (“ns3::StaWifiMac”,

“Ssid”, SsidValue (ssid),

“ActiveProbing”, BooleanValue (false));

NetDeviceContainer devices = wifi.Install (phy, mac, nodes);

mac.SetType (“ns3::ApWifiMac”,

“Ssid”, SsidValue (ssid));

wifi.Install (phy, mac, nodes.Get (0)); // Set node 0 as AP

// Set up mobility

MobilityHelper mobility;

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

mobility.Install (nodes);

// Set up Internet stack

InternetStackHelper stack;

stack.Install (nodes);

// Assign IP addresses

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces = address.Assign (devices);

// Set up energy model

BasicEnergySourceHelper basicSourceHelper;

basicSourceHelper.Set (“BasicEnergySourceInitialEnergyJ”, DoubleValue (100.0));

EnergySourceContainer sources = basicSourceHelper.Install (nodes);

WifiRadioEnergyModelHelper radioEnergyHelper;

radioEnergyHelper.Set (“TxCurrentA”, DoubleValue (0.0174));

radioEnergyHelper.Set (“RxCurrentA”, DoubleValue (0.0197));

DeviceEnergyModelContainer deviceModels = radioEnergyHelper.Install (devices, sources);

// Set up applications

UdpEchoServerHelper echoServer (9);

ApplicationContainer serverApps = echoServer.Install (nodes.Get (0));

serverApps.Start (Seconds (1.0));

serverApps.Stop (Seconds (20.0));

UdpEchoClientHelper echoClient (interfaces.GetAddress (0), 9);

echoClient.SetAttribute (“MaxPackets”, UintegerValue (100));

echoClient.SetAttribute (“Interval”, TimeValue (Seconds (1.0)));

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

ApplicationContainer clientApps = echoClient.Install (nodes.Get (1));

clientApps.Start (Seconds (2.0));

clientApps.Stop (Seconds (20.0));

// Schedule energy-aware resource allocation

Simulator::Schedule (Seconds (5.0), &AdjustNodeTransmissionPower, nodes, sources);

Simulator::Stop (Seconds (20.0));

Simulator::Run ();

Simulator::Destroy ();

return 0;

}

void AdjustNodeTransmissionPower (NodeContainer nodes, EnergySourceContainer sources)

{

for (NodeContainer::Iterator i = nodes.Begin (); i != nodes.End (); ++i)

{

Ptr<Node> node = *i;

Ptr<EnergySource> source = sources.Get (node->GetId ());

double remainingEnergy = source->GetRemainingEnergy ();

Ptr<NetDevice> device = node->GetDevice (0);

Ptr<WifiNetDevice> wifiDevice = DynamicCast<WifiNetDevice> (device);

Ptr<YansWifiPhy> phy = DynamicCast<YansWifiPhy> (wifiDevice->GetPhy ());

if (remainingEnergy < 50.0) // If energy is less than 50J, reduce transmission power

{

phy->SetTxPowerEnd (phy->GetTxPowerEnd () / 2);

phy->SetTxPowerStart (phy->GetTxPowerStart () / 2);

}

}

// Schedule the next adjustment

Simulator::Schedule (Seconds (5.0), &AdjustNodeTransmissionPower, nodes, sources);

}

  1. Run the Simulation: Compile and run your simulation script:

./waf configure

./waf build

./waf –run EnergyAwareResourceAllocation

Explanation:

  • Node Creation: Create nodes representing devices in the network.
  • Wi-Fi Setup: For communication purpose, we have to configure Wi-Fi.
  •  Mobility: Set constant positions for nodes to represent their locations.
  • Internet Stack: Install the Internet stack on all nodes.
  • Energy Model: simulate energy consumption by installing an energy model like basic energy source and radio energy model on the nodes.
  •  Applications: Use UDP Echo server and client applications to simulate data transmission.
  • Energy-Aware Resource Allocation: we have to let the remaining energy to conserve some energy by modifying their transmission power of nodes.

Step 4: Data Collection and Analysis

  • Flow Monitor: Use the flow monitor to accumulate data on packet loss, delay, throughputs and so on.
  • Export Data: Analyze the performance and their energy consumption of the networks by exporting the accumulated data.

As we seen earlier, this script contains the implementation process of energy aware resource allocation in the ns3 tool and how it works with sample. We can provide further details about ns3 or resource allocation if needed.

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