How to Implement Energy Aware Resource Allocation in NS2

To implement the Network Energy-Aware Resource Allocation using NS2 (Network Simulator 2), we require to follow the below process that encompass the altering an existing protocols or enhancing a new module to help the energy-efficient resource allocation. The following is a high-level approach to implement it in NS2:

Step-by-Step Process:

  1. Understand the NS2 Basics:
  • NS2 containing its architecture, C++ programming components, OTcl (Object Tcl) scripting. Know the network protocol stack, node structure, and energy models previously present in the simulation environment NS2.
  1. Install NS2 and Validate the Installation:
  • Here, we install NS2 on the computer by following the suitable installation steps for the operating system (Linux or Windows with Cygwin).
  • Make certain that NS2 is running properly by replicating the simple instance such AODV or TCP and also verifying the trace files.
  1. Incorporate an Energy Model:
  • NS2 already encompass a simple energy models. For energy-aware resource allocation, we can be changed or used the energy model provided by NS2:
    • We open the file ns-2.xx/energy/energy_model.cc and energy_model.h (where xx is your NS2 version).
    • Improve or alter the energy consumption metrics such as idle power, transmit power, receive power, and so on, based on the simulation needs.
  1. Create or Modify the Resource Allocation Algorithm:
  • Change an existing MAC/PHY layer protocol (such as 802.11 or AODV) for resource allocation to create this energy-aware by integrating an energy-aware decisions.
  • We can write a new module in C++ to manage the allocation of resources rely on the remaining energy of nodes. For example, we can write a function, which:
    • Periodically verifies the residual energy of nodes.
    • Assigns bandwidth or resources to nodes are depends on their energy levels.
  1. Modify MAC Layer:
  • To execute an energy-aware resource allocation, we will be required to modify the MAC protocol (Medium Access Control) so as to nodes including higher energy levels are prioritized.
  • We can extend the existing MAC protocols by appending the energy-related metrics for packet transmission and scheduling. Change files such as mac-802_11.cc and mac-802_11.h for 802.11-based energy-aware allocation.
  1. Design an Energy-Aware Scheduling Algorithm:
  • Change or execute an algorithm, which schedules a transmission of data according to the energy. We can be used the algorithms such as LEACH (Low Energy Adaptive Clustering Hierarchy) or create a custom algorithm that:
    • Choose the nodes are rely on residual energy.
    • Assigns the bandwidth or time slots to the node with the highest energy.
    • Decreases the energy consumption by enhancing transmission power.
  1. Modify the Routing Protocol (Optional):
  • If we are executing on the routing protocol like AODV or DSR, we can create this t energy-aware by changing the routing decisions based on the energy left within the nodes.
  • Append a new field in the routing packets to take an energy information as well as create a routing decision rely on the remaining energy of nearby nodes.
  1. Simulation Script (OTcl):
  • Inscribe a simulation script in OTcl, which set up the nodes and sets energy parameters also invokes the energy-aware resource allocation algorithm.
  • Describe an energy model parameters within the OTcl script:

set energy_model EnergyModel

set node_(energy) [new $energy_model]

$node_(energy) setInitialEnergy 1000 ;# Set initial energy of the node

  1. Run the Simulation:
  • Compile the changed NS2 origin code that to encompass modifies (if you modified C++ code).
  • Run the OTcl simulation script.
  • Examine the trace files or use NAM (Network Animator) to envision the outcomes also make sure energy-aware resource allocation works as expected.
  1. Analyze Results:
  • We can use the trace files to verify the energy consumption and resource allocation effectiveness.
  • Metrics like packet delivery ratio, energy consumption per node, and throughput would estimate to make sure the execution is operating successfully.

Key Files to Modify:

  • ns-2.xx/energy/energy_model.cc: Change or make a custom energy model.
  • ns-2.xx/mac/mac-802_11.cc: Create or alter the MAC layer energy-aware.
  • ns-2.xx/routing/aodv/aodv.cc: Change the routing protocol to integrate the energy-aware decisions (if needed).
  • OTcl scripts: Write custom simulation scripts to run the energy-aware simulation.

As above, we elaborately explained the methods for implementation of the Network Energy aware resource allocation within NS2 platform. Further detail will be made obtainable if needed. If you’re looking for assistance with implementing Network Energy Aware Resource Allocation in NS2, feel free to contact the ns2project.com team. We have fantastic project ideas that align perfectly with your research interests.