Detection of Selfish Nodes in Manet

Abstract

An Ad-hoc network is a collection of mobile nodes without any central authority which forms temporary network dynamically. Because of limited communication range among MANET, several network hopes may be needed to deliver a packet from one node to another node in the wireless network. In Ad-hoc network each node is router as well as the end system which uses services of network. Means each node provides services to other nodes and use services of other nodes. All protocols (AODV, DSR etc) which has designed till now takes ideal condition scenario in which all nodes are well behaved and forward all type of packets comes to them. But in Real network some nodes may be selfish. Such nodes may not cooperate with its neighboring nodes and use their resources and not provide its own resources for them. By this activity selfish node can reserves its CPU power, bandwidth for retransmitting data of others, battery and can use it for them only when they needed. For detection of such nodes we can modify existing protocols like DSR, AODV. In this project we proposed a new neighboring node based mechanism for detection of selfish nodes in MANET and perform the simulation using Network Simulator-2(Version-2.35). Each node of MANET has to be co-operating on continuous basis within a time frame. Behavior of those nodes which has not cooperated with other nodes treated as suspicious and has to go under test of checking selfishness. Simulation results show that our neighboring node based system can be used for detection of selfish nodes.