How to Calculate Power Consumption in NS2

To implement power consumption in ns2, this is vital for wireless networks, especially in Wireless Sensor Networks (WSNs) and Mobile Ad-hoc Networks (MANETs), in which the energy efficiency is a major performance queries. NS2 deliver an energy model to monitor the energy consumption of each node in the course of different states, like transmission, reception, idle, and sleep. To Calculate Power Consumption in NS2 stay in touch with us we give you good guidance throughout your work with brief explanation.

Here is a brief procedure on how to calculate the power consumption in ns2

Steps to Calculate Power Consumption in NS2

Understand the Energy Model in NS2:

NS2 uses the EnergyModel to handle power consumption. The key parameters include:

Transmission Power (TxPower_): Power consumed during packet transmission.
Reception Power (RxPower_): Power consumed in the course of packet reception.
Idle Power (IdlePower_): Power consumed when the node is idle nevertheless ready to receive data.
Sleep Power (SleepPower_): Power consumed when the node is in sleep mode.
Initial Energy (energy_): The initial energy of each node (in Joules).
Energy Model (EnergyModel): Monitors energy depletion over time according to the node’s activities.

Set Up the Energy Model in the TCL Script:

To estimate power consumption we require setup the energy model for the nodes in TCL script. Below is a sample demonstrating on how to set up the energy model in NS2:

Example TCL Script to Set Up the Energy Model:

# Create the simulator

set ns [new Simulator]

# Define the Topography (e.g., 1000m x 1000m area)

set topo [new Topography]

$topo load_flatgrid 1000 1000

# Create two nodes

set node_(0) [$ns node]

set node_(1) [$ns node]

# Attach an energy model to each node

set energyModel [new EnergyModel]

$node_(0) set energyModel_ $energyModel

$node_(1) set energyModel_ $energyModel

# Set initial energy (in Joules)

$node_(0) energyModel set energy_ 100.0 ;# Node 0 starts with 100 Joules

$node_(1) energyModel set energy_ 100.0 ;# Node 1 starts with 100 Joules

# Define power consumption for various states (in Watts)

$energyModel set TxPower_ 0.5 ;# 0.5W during transmission

$energyModel set RxPower_ 0.3 ;# 0.3W during reception

$energyModel set IdlePower_ 0.1 ;# 0.1W during idle mode

$energyModel set SleepPower_ 0.001 ;# 0.001W during sleep mode

# Set up wireless channel

set chan_ [new Channel/WirelessChannel]

$node_(0) set channel_ $chan_

$node_(1) set channel_ $chan_

# Mobility (optional)

$ns at 10.0 “$node_(0) setdest 500 500 10” ;# Node 0 moves at time 10s

# Attach traffic agents (optional)

set udp0 [new Agent/UDP]

set sink [new Agent/Null]

$ns attach-agent $node_(0) $udp0

$ns attach-agent $node_(1) $sink

$ns connect $udp0 $sink

# Create traffic (CBR – Constant Bit Rate)

set cbr0 [new Application/Traffic/CBR]

$cbr0 attach-agent $udp0

$ns at 1.0 “$cbr0 start”

$ns at 5.0 “$cbr0 stop”

# Enable tracing to monitor the energy levels

set tracefile [open out.tr w]

$ns trace-all $tracefile

# Flush and close the trace file at the end

proc finish {} {

global ns tracefile

$ns flush-trace

close $tracefile

exit 0

}

$ns at 20.0 “finish”

Monitoring Energy Levels:

Once the simulation is configured, we can observe the remaining energy of each node to regulate how much energy has been consumed. Energy is exhausted according to the activities of each node (transmission, reception, idle, etc.).

To print the remaining energy at certain intervals, we can add a function that validates the node’s energy level in the course of the simulation.

Example Code to Print Energy Levels:

# Function to check and print the remaining energy of a node

proc check_energy {node_id time} {

global ns node_

set energy [$node_($node_id) energy]

puts “Node $node_id energy at time $time: $energy Joules”

}

# Schedule energy checks during the simulation

$ns at 2.0 “check_energy 0 2.0”

$ns at 6.0 “check_energy 0 6.0”

$ns at 10.0 “check_energy 1 10.0”

# Continue simulation…

This code will print the remaining energy of node 0 at times 2s and 6s, and node 1 at 10s. we can adapt the intervals and nodes as necessary.

Calculating Power Consumption:

The power consumption of a node is the difference among the initial energy and the remaining energy at any given time:

Power Consumption=Initial Energy−Remaining Energy\text{Power Consumption} = \text{Initial Energy} – \text{Remaining Energy}Power Consumption=Initial Energy−Remaining Energy

For sample, if a node initiate with 100 Joules and has 85 Joules remaining after the simulation, the power consumed is:

Power Consumed=100 Joules−85 Joules=15 Joules\text{Power Consumed} = 100 \, \text{Joules} – 85 \, \text{Joules} = 15 \, \text{Joules}Power Consumed=100Joules−85Joules=15Joules

Trace File Analysis:

The energy consumption can also be monitored using the trace file created in course of the simulation. The trace file includes events associated to packet transmission, reception, and other behaviours that contribute to energy consumption.

Open the trace file (out.tr) and look for energy-related events.
We can evaluate the residual energy at different points of time and estimate the total energy consumption based on that.

Key Parameters That Affect Energy Consumption:

Numerous factors influence power consumption in a network simulation:

Transmission Power: Higher transmission power consumes more energy.
Reception Power: Nodes consume energy though receiving packets.
Idle Power: Even when not transferring or receiving, nodes preserve energy in idle mode.
Sleep Mode: A very low-power mode in which the node preserves energy, nevertheless it cannot participate in network activities.
Mobility: Nodes that are continuously forwarding to use more energy for interaction as distances among nodes change.

Through the structure and detailed guide you can able to understand and to calculate the power consumption by simulating energy module to monitor their utilization of power in the network. We plan to deliver more information regarding the power consumption in further pages.