How to Implement network Power Allocation in ns3

To implement the network power allocation in ns3 has encompasses to configure the transmit power levels of the nodes that is to enhance the network performance like make best use of the throughput, reducing the interference or extending the battery life in the wireless network. The given below is the detailed procedure on how to implement the power allocation in ns3 tool:

Step-by-Step Implementation:

1. Install ns3: Make sure ns3 is installed in the computer.
2. Set up Your Simulation Environment: Create a new simulation script or modify an existing one. Include necessary modules such as network, internet, and mobility.
3. Define Network Topology: Set up the network topology by defining nodes, channels, and devices.

NodeContainer nodes;

nodes.Create(3); // Example with 3 nodes

YansWifiChannelHelper channel = YansWifiChannelHelper::Default();

YansWifiPhyHelper phy = YansWifiPhyHelper::Default();

phy.SetChannel(channel.Create());

WifiHelper wifi = WifiHelper::Default();

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);

Configure Internet Stack: Install the internet stack on the nodes and assign IP addresses.

InternetStackHelper stack;

stack.Install(nodes);

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces = address.Assign(devices);

Implement Power Allocation Mechanism: Implement a power allocation mechanism based on criteria such as distance, signal strength, or interference. Below is an example where we adjust the transmit power based on the distance between nodes.

class PowerAllocationHelper

{

public:

static void AdjustTransmitPower(NodeContainer nodes, double maxPowerDbm, double minPowerDbm)

{

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

{

Ptr<Node> node = *it;

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

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

Ptr<WifiPhy> wifiPhy = wifiDevice->GetPhy();

// Example: Adjust power based on node ID (simple example)

double powerDbm = maxPowerDbm – node->GetId() * (maxPowerDbm – minPowerDbm) / nodes.GetN();

wifiPhy->SetAttribute(“TxPowerStart”, DoubleValue(powerDbm));

wifiPhy->SetAttribute(“TxPowerEnd”, DoubleValue(powerDbm));

std::cout << “Node ” << node->GetId() << ” set to power: ” << powerDbm << ” dBm” << std::endl;

}

}

};

Setup Power Allocation in the Simulation: Integrate the power allocation helper into your simulation script.

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

{

CommandLine cmd;

cmd.Parse(argc, argv);

NodeContainer nodes;

nodes.Create(3); // Example with 3 nodes

YansWifiChannelHelper channel = YansWifiChannelHelper::Default();

YansWifiPhyHelper phy = YansWifiPhyHelper::Default();

phy.SetChannel(channel.Create());

WifiHelper wifi = WifiHelper::Default();

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);

InternetStackHelper stack;

stack.Install(nodes);

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces = address.Assign(devices);

// Adjust transmit power for all nodes

double maxPowerDbm = 20.0; // Maximum power in dBm

double minPowerDbm = 0.0;  // Minimum power in dBm

PowerAllocationHelper::AdjustTransmitPower(nodes, maxPowerDbm, minPowerDbm);

Simulator::Run();

Simulator::Destroy();

return 0;

}

Explanation

1. PowerAllocationHelper Class:
   • AdjustTransmitPower: This static method iterates through the nodes and adjusts their transmit power based on a simple criterion. In this example, the transmit power is linearly scaled based on the node ID.
2. Main Function:
   • Sets up the nodes, installs the PHY and MAC layers, configures the internet stack, assigns IP addresses, and runs the simulation.
   • Uses PowerAllocationHelper to adjust the transmit power of the nodes.

Finally, we all get knowledge about the network power allocation and then it improves the network performance among the traffic with the help of ns3 tool. We will provide further information regarding the network power allocation.

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