Techniques for Detection of Misbehaving Nodes in MANET: A Study

Mobile ad hoc networks (MANETs) can be defined as a collection of large number of mobile nodes. MANET has variety of applications such military, disaster stuck areas and the characteristics like dynamic topology, no fixed infrastructure etc. Still there are some security issues and challenges in it. MANET is vulnerable to various attacks due to its open medium. Hence there is need to study in detail about how to detect malicious or misbehaving node present in network. In this paper we present different techniques for detection of misbehavior of node. Techniques studied in this paper are: Watchdog, ExWatchdog, TWOACK, S-TWOACK, 2ACK and Adaptive ACKnowledgment (AACK), CONFIDANT, Record and Trust Based Detection. All techniques are analyzed with parameters like type of misbehavior, key mechanism used, advantages, limitations and performance evaluation using packet delivery ratio (PDR) and throughput. We also suggested with the further research directions.