How to Implement Spectrum Allocation in OMNeT++

To implement spectrum allocation in OMNeT++ has encompasses to generate a simulation model that denotes how spectrum resources are distributed and used in a network. This process usually involves describing network nodes, channels, and the algorithms that handle the allocation of spectrum to various users or devices. The given below are the procedure and an example to get you started:

Steps to Implement Spectrum Allocation in OMNeT++

1. Install OMNeT++ and INET Framework:
   • Make sure that OMNeT++ and the INET framework are installed. INET delivers numerous modules and classes that can be used for wireless communication replication.
2. Define the Network Topology:
   • Generate a network topology in OMNeT++ using .ned files. This file will describe the nodes like base stations, mobile devices and the channels used for communication.
3. Create or Modify Channel Model:
   • State the wireless channel model that denotes the spectrum. This can be completed in the .ned file or by generating a custom channel model in a .cc file.
4. Implement Spectrum Allocation Algorithm:
   • Execute the spectrum allocation logic in the simulation. This can be completed by generating a custom module or adjusting an existing one in the INET framework.
   • The allocation technique might be based on numerous techniques like Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), or Dynamic Spectrum Allocation (DSA).
5. Simulation Configuration:
   • Setup the simulation parameters in the .ini file, where we state the number of nodes, the simulation time, and the particular metrics that related to spectrum allocation.
6. Run the Simulation:
   • Execute the simulation and evaluate the outcomes using OMNeT++’s built-in tools or export the outcomes for further analysis.

Example: Simple Spectrum Allocation in OMNeT++

The given below is the sample of how you can set up a simple spectrum allocation scenario in OMNeT++.

1. Network Definition in .ned file

network SpectrumAllocationNetwork

{

submodules:

baseStation: BaseStation {

@display(“p=100,100”);

}

mobileNode1: MobileNode {

@display(“p=200,200”);

}

mobileNode2: MobileNode {

@display(“p=300,200”);

}

channel: WirelessChannel {

@display(“p=250,150”);

}

connections:

mobileNode1.radioModule <–> channel <–> baseStation.radioModule;

mobileNode2.radioModule <–> channel <–> baseStation.radioModule;

}

2. Implement Spectrum Allocation Algorithm in a Custom Module

We have to generate a custom C++ module that handles the spectrum allocation. For example, we could execute a basic FDMA algorithm.

class SpectrumAllocator : public cSimpleModule

{

protected:

virtual void initialize() override;

virtual void handleMessage(cMessage *msg) override;

private:

void allocateSpectrum(cMessage *msg);

};

Define_Module(SpectrumAllocator);

void SpectrumAllocator::initialize()

{

// Initialization code

}

void SpectrumAllocator::handleMessage(cMessage *msg)

{

allocateSpectrum(msg);

}

void SpectrumAllocator::allocateSpectrum(cMessage *msg)

{

// Simple FDMA allocation

// For example, assign different frequencies to different nodes

if (msg->isSelfMessage()) {

// Allocation logic here

}

}

3. Simulation Configuration in .ini file

network = SpectrumAllocationNetwork

sim-time-limit = 10s

**.channelType = “WirelessChannel”

**.SpectrumAllocator.frequencyBand1 = 2.4e9  # Example frequency band 1

**.SpectrumAllocator.frequencyBand2 = 5.0e9  # Example frequency band 2

Running the Simulation

• Compile the code and execute the simulation using OMNeT++’s IDE.
• Evaluate the outcome to see how the spectrum was distributed and used during the replication.

We had demonstrated how to setup the simulation and how to implement the spectrum allocation in the network using the OMNeT++ tool. We will deliver more information about the spectrum allocation performance in other scenario.

omnet-manual.com are here to assist you at every stage of your Spectrum Allocation implementation in the OMNeT++ tool. Stay in touch with us to discover more about this subject!