OPNET Technologies
7255 Woodmont Avenue
Bethesda, MD 20814
Tel: 240-497-3000
Fax: 240-497-3001
E-mail: mailto:info@opnet.com
Web: www.opnet.com/home.html

OPNET is a registered
trademark of OPNET Technologies.
© 2003 OPNET Technologies

University: The University of Michigan

Name of Sponsoring Professors:

• Wayne Stark
  
• Stéphane Lafortune
  
• Demosthenis Teneketzis
  
• Achilleas Anastasopoulos
  
• Mingyan Liu
  

Department: Department of Electrical Engineering and Computer Science

MURI Low-Energy Electronic Design for Mobile Platforms
Network Layer Simulation and Optimization

• Overview
  

  The Multidisciplinary University Research Initiative (MURI) undertaken at the University of Michigan was to investigate the various protocols, algorithms and hardware design for future army communication systems from a low energy perspective. This overview gives a general description of the MURI project and how its simulation in OPNET was integrated with the simulated annealing method, our optimization tool.

• Simulation and Optimization Setup
  

  Since we used an averaged value over the same parameter set as the value of the objective function for optimization (Please see Status Report below for detail), we actually shortened the execution time by running many OPNET simulation processes parallelly on different machines, with each process having the same parameter set but a different random seed.

• Modeling in OPNET
  

  A wireless ad hoc network can be very complicated and it may consist of many mobile units with a lot of different functionalities. We have a generic node structure modeled in OPNET. We have been adding new features in our OPNET models since our review in ARL in July, 1999.

  • Wireless link state routing similar to OSPF in each node.
  • Convolutional decoding and turbo decoding data from processing layer for network simulation.
    
  • Wave propagation model in forest.
    
  • Wave propagation model from SUO (small unit operation) project.
  
  
• Status Report
  

  The status reports give more detailed description about the progress of MURI network layer simulation and optimization.

  • May, 1999 Report
  
  
  • September, 1999 Report
  
  
• Important Reviews
  

  There are several important reviews at different stages of the MURI project. The presentation files for each review are given here.

  • Review at Army Research Laboratory (ARL), Washington, DC on 07/07/1999 - 07/08/1999
  
  
  • Review at Army Research Laboratory (ARL), Washington, DC on 11/16/2000
  
  
  • Final Review at University of Michigan on 07/09/2002
  
  
• Publication
  

  A lot of papers related to "MURI Low-Energy Electronic Design for Mobile Platforms" have been published. Please refer to principal investigator's MURI homepage for a full list of publications. The paper below is most closely related to MURI network layer simulation and optimization.

  • W.E. Stark, H. Wang, A. Worthen, S. Lafortune, D. Teneketzis,
    Low-Energy Wireless Communication Network Design,
    IEEE Wireless Communications, pp. 60-72, August 2002.
  
  
  
  

Mobility Model Study

• We have studied several mobility models for different objectives. One of the mobility models is for nodes to maximize coverage area. This kind of mobility model is very useful for dynamically configurable sensor networks.