How to Begin Implement Network Transmission Power in NS3

To begin implementing and analysing the Network Transmission Power using NS3, we will need to set up and estimate the transmission power of network devices, which is specifically used within wireless networks. Transmission power computes the signal strength, to impact the interaction range, energy utilization, and network performance. Here’s a common approach to get started:

Steps to Implement Network Transmission Power in NS3

1. Understand Transmission Power

• Definition: Transmission power is the level of power upon which a network device transmits the signals, which is normally estimated within dBm (decibel-milliwatts).
• Key Parameters:
  • TxPowerEnd: Maximum transmission power.
  • TxPowerStart: Minimum transmission power.
  • TxGain: Gain used to the transmission.
• Impact:
  • Higher transmission power maximizes the range however it utilizes extra energy and probably triggers the interference.
  • Lower transmission power saves energy nevertheless it minimize the range.

2. Set Up NS3 Simulation Environment

1. Install NS3:
   • We can install and download the new version of NS3 on the system.
2. Define a Wireless Network:
   • Make a wireless network using Wifi or Lte module for wireless networks in which transmission power is a crucial metric.

3. Configure Transmission Power

1. Set Transmission Power:
   • Set up the TxPowerStart and TxPowerEnd attributes within the PHY helper.

YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default();

wifiPhy.Set(“TxPowerStart”, DoubleValue(10.0)); // Minimum power in dBm

wifiPhy.Set(“TxPowerEnd”, DoubleValue(20.0));   // Maximum power in dBm

wifiPhy.Set(“TxGain”, DoubleValue(1.0));        // Transmission gain

1. Monitor Transmission Power:
   • During the simulation, monitor the transmission power modifies to leverage tracing or logging.

4. Implement Transmission Power Configuration

Here’s a sample script, which configures and records the transmission power within a wireless network.

Example Script: Configuring Transmission Power in NS3

#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”

using namespace ns3;

void LogTransmissionPower(Ptr<WifiPhy> phy) {

double txPower = phy->GetTxPowerStart();

NS_LOG_UNCOND(“Time: ” << Simulator::Now().GetSeconds() << “s, Transmission Power: ” << txPower << ” dBm”);

Simulator::Schedule(Seconds(1.0), &LogTransmissionPower, phy);

}

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

CommandLine cmd;

cmd.Parse(argc, argv);

// Create nodes

NodeContainer nodes;

nodes.Create(2);

// Configure mobility

MobilityHelper mobility;

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

mobility.Install(nodes);

// Configure WiFi

YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default();

YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default();

wifiPhy.SetChannel(wifiChannel.Create());

wifiPhy.Set(“TxPowerStart”, DoubleValue(15.0)); // Transmission power in dBm

wifiPhy.Set(“TxPowerEnd”, DoubleValue(15.0));   // Constant transmission power

wifiPhy.Set(“TxGain”, DoubleValue(0.0));        // No additional gain

WifiHelper wifi;

wifi.SetStandard(WIFI_PHY_STANDARD_80211g);

WifiMacHelper wifiMac;

wifiMac.SetType(“ns3::AdhocWifiMac”); // Ad-hoc mode

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

// Install 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);

// Log transmission power of the first node

Ptr<WifiNetDevice> wifiDevice = DynamicCast<WifiNetDevice>(devices.Get(0));

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

Simulator::Schedule(Seconds(1.0), &LogTransmissionPower, phy);

Simulator::Stop(Seconds(10.0));

Simulator::Run();

Simulator::Destroy();

return 0;

}

Explanation of the Script

1. Transmission Power Configuration:
   • TxPowerStart and TxPowerEnd are configured to a fixed value of 15 dBm for sustaining constant transmission power.
2. WiFi Configuration:
   • The YansWifiPhyHelper is leveraged for setting up the PHY layer including transmission power settings.
3. Logging Transmission Power:
   • The LogTransmissionPower function records the transmission power of the initial node for each second.
4. Ad-Hoc Mode:
   • The AdhocWifiMac is designed for setting the network within ad-hoc mode.

5. Run the Simulation

1. Build the simulation script:

./waf –run “your-script-name”

1. During the simulation, monitor the records for transmission power values.

6. Analyze Results

• Impact of Transmission Power:
  • Experiment various values for TxPowerStart and TxPowerEnd to examine its influence over interaction range and packet delivery.
• Energy Efficiency:
  • Integrate transmission power analysis including energy utilization parameters with the support of NS3 Energy Framework.
• Interference:
  • Maximize the volume of nodes and then monitor how higher transmission power triggers interference.

Through this manual, entire implementation instructions with sample coding for executing and studying Network Transmission Power have been outlined using NS3 environment. We are ready to provide more details as required.