دانلود Fault Diagnosis in Wireless Sensor Networks: ASurvey

Abstract

The sensor nodes in wireless sensor networks maybe deployed in unattended and possibly hostile environments. The ill-disposed  environment  affects  the  monitoring  infrastructure that  includes  the  sensor  nodes  and  the  network.  In  addition, node failures and environmental hazards cause frequent topology changes, communication failures, and network partitioning. This in  turn  adds  a  new  dimension  to  the  fragility  of  the  network topology.  Such  perturbations are  far  more  common  than  those found  in  conventional  wireless  networks  thus,  demand  efficient techniques for discovering disruptive behavior in such networks. Traditional fault diagnosis techniques devised for multiprocessor systems  are  not directly applicable to  wireless  sensor  networks due  to  their  specific  requirements  and  limitations.  This  survey integrates  research  efforts  that  have  been  produced  in  fault diagnosis  specifically  for  wireless  sensor  networks.  The  survey aims at clarifying and uncovering the potential of this technology by providing the technique-based taxonomy. The fault diagnosis techniques  are   classified  based   on  the  nature  of  the  tests, correlation between sensor readings and characteristics of sensor nodes and the network.