Using Existing Network Simulators for Power-Aware Self-Organizing   Wireless Sensor Network Protocols
  In this document, we compare three existing simulation platforms (OPNET Modeler, Network Simulator 2, Georgia Tech Sensor Network Simulator). Our comparative study focuses on ease of use, scalability, ease of implementing power consumption model and physical layer modeling accuracy, mainly. Conclusions of this study are presented, and will help us decide which simulating environment to use for evaluating power-aware self-organizing sensor networks protocols. 
Thomas Watteyne (INRIA Rh\^one-Alpes)