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How to Implement network Power Allocation in OMNeT++

To implement the network power allocation within OMNeT++ has comprises making a mechanism that enthusiastically modifies the transmission power of network nodes based on factors like network conditions, distance, interference, and signal strength. This allocation is critical for optimizing energy efficiency, decreasing interference, and enhancing complete network performance. Given below is a proper procedure to execute the network power allocation in OMNeT++:

Steps to Implement Network Power Allocation in OMNeT++

  1. Install OMNeT++ and INET Framework:
    • Make sure that OMNeT++ and the INET framework are installed. INET offers needed components for mimicking wireless networks, with PHY and MAC layers where power control can be executed.
  2. Define the Network Topology:
    • Generate a network topology using a .ned file that comprises nodes like wireless hosts, routers whose transmission power will be dynamically controlled.
  3. Implement the Power Allocation Mechanism:
    • Improve a power allocation algorithm that modifies the transmission power of each node based on norms like interference levels, or energy constraints, distance to the receiver, and required signal-to-noise ratio (SNR).
  4. Simulate Various Scenarios:
    • Form scenarios where nodes want to modify their power levels dynamically in response to varying network conditions, like changing distances among nodes, mobility, or interference from other transmissions.
  5. Configure the Simulation Environment:
    • Use the .ini file to form parameters like primary power levels, thresholds for power adjustment, and exact algorithms for power allocation.
  6. Run the Simulation and Analyse Results:
    • Perform the simulation and evaluate the performance of the power allocation mechanism. Important metrics contain e communication reliability, network throughput, interference levels, and energy consumption.

Example: Implementing Basic Network Power Allocation in OMNeT++

  1. Define the Network Topology in a .ned File

// PowerAllocationNetwork.ned

package networkstructure;

import inet.node.inet.WirelessHost;

import inet.node.inet.Router;

network PowerAllocationNetwork

{

parameters:

int numNodes = default(5);  // Number of nodes in the network

submodules:

node[numNodes]: WirelessHost {

@display(“p=100,100”);

numApps = 1;

app[0].typename = “PowerAllocationApp”;

}

router: Router {

@display(“p=300,200”);

}

connections:

node[*].wlan[0] <–> WirelessChannel <–> router.wlan[0];

}

  1. Implement the Power Allocation Mechanism

Form a C++ class for the application that manages power allocation for each node.

#include <omnetpp.h>

#include <inet/applications/base/ApplicationBase.h>

using namespace omnetpp;

using namespace inet;

class PowerAllocationApp : public ApplicationBase

{

protected:

double currentPowerLevel;

double requiredSNR;

virtual void initialize(int stage) override;

virtual void handleMessageWhenUp(cMessage *msg) override;

void adjustPowerLevel();

public:

virtual int numInitStages() const override { return NUM_INIT_STAGES; }

};

Define_Module(PowerAllocationApp);

void PowerAllocationApp::initialize(int stage)

{

ApplicationBase::initialize(stage);

if (stage == INITSTAGE_APPLICATION_LAYER) {

// Initialize default power level and required SNR

currentPowerLevel = par(“initialPowerLevel”).doubleValue();

requiredSNR = par(“requiredSNR”).doubleValue();

// Schedule initial power adjustment

scheduleAt(simTime() + uniform(1, 2), new cMessage(“adjustPowerLevel”));

}

}

void PowerAllocationApp::handleMessageWhenUp(cMessage *msg)

{

if (strcmp(msg->getName(), “adjustPowerLevel”) == 0) {

adjustPowerLevel();

scheduleAt(simTime() + uniform(1, 2), msg);  // Re-schedule power adjustment

} else {

delete msg;

}

}

void PowerAllocationApp::adjustPowerLevel()

{

EV << “Adjusting power level based on network conditions.” << endl;

// Example: Adjust power level based on distance to the router

double distanceToRouter = getParentModule()->getDistanceTo(getParentModule()->getParentModule()->getSubmodule(“router”));

double snr = currentPowerLevel / (distanceToRouter * distanceToRouter);  // Simplified SNR calculation

if (snr < requiredSNR) {

// Increase power level if SNR is below the required threshold

currentPowerLevel = std::min(currentPowerLevel * 1.1, par(“maxPowerLevel”).doubleValue());

EV << “Increased power level to: ” << currentPowerLevel << ” W” << endl;

} else {

// Decrease power level if SNR is above the required threshold

currentPowerLevel = std::max(currentPowerLevel * 0.9, par(“minPowerLevel”).doubleValue());

EV << “Decreased power level to: ” << currentPowerLevel << ” W” << endl;

}

// Apply the adjusted power level to the transmitter

getParentModule()->getSubmodule(“wlan”)->par(“transmitterPower”) = currentPowerLevel;

}

  1. Configure the Simulation in the .ini File

# omnetpp.ini

[General]

network = networkstructure.PowerAllocationNetwork

sim-time-limit = 300s

# Node settings

*.node[*].wlan.mac.maxQueueSize = 1000;

*.node[*].wlan.phy.transmitter.power = 2mW;

*.node[*].mobility.bounds = “500m 500m”;

# Power allocation settings

*.node[*].app[0].initialPowerLevel = 2.0;  # Initial power level in watts

*.node[*].app[0].requiredSNR = 10;         # Required signal-to-noise ratio (SNR)

*.node[*].app[0].maxPowerLevel = 5.0;      # Maximum power level in watts

*.node[*].app[0].minPowerLevel = 0.5;      # Minimum power level in watts

  1. Explanation of the Example
  • Network Topology (PowerAllocationNetwork.ned):
    • The network contains several nodes that dynamically modify their transmission power based on network conditions. Every single node communicates with a central router.
  • Power Allocation Mechanism (PowerAllocationApp.cc):
    • The PowerAllocationApp module modifies the transmission power of each node based on the distance to the router and the essential signal-to-noise ratio (SNR). If the SNR is very low, the power level is rised; if the SNR is higher than essential, the power level is reduced to save energy.
  • Simulation Configuration (omnetpp.ini):
    • The .ini file configures the first power levels, SNR thresholds, and other parameters for the nodes. It also places the bounds for power modifications.

Running the Simulation

  • Compile the project in OMNeT++ IDE and run the simulation.
  • Examine how nodes modify their power levels based on network conditions using OMNeT++’s tools. Attention on metrics such as energy consumption, interference levels, network throughput, and communication reliability.

Extending the Example

  • Advanced Power Allocation Algorithms: Execute more sophisticated power allocation algorithms that consider factors such as interference from nearest nodes, multi-hop communication, or energy harvesting capabilities.
  • Cooperative Power Control: Permit nodes to cooperate in modifying their power levels, possibly via a central controller or dispersed algorithms that share information about current power levels and meddling.
  • Mobility: Launch mobility for the nodes to learn how power allocation adjusts to varying distances and network topology.
  • QoS-Aware Power Control: Execute QoS-aware power control algorithms that modify power levels based on the kind of traffic like real-time video, best-effort data and their corresponding QoS requirements.
  • Environmental Factors: Mimic environmental factors like shadowing, fading, and obstacles that impact signal propagation and power allocation decisions.

In the above following details are support on how to execute and simulate the network Power allocation within OMNeT++ using the INET framework. Additional concepts will be given regarding this topic as needed.

Scholars may get implementation assistance for network power allocation in the OMNeT++ tool at omnet-manual.com. Obtain assistance with network performance analysis and our project subject suggestions.

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