Abstract

Mobile ad hoc networking works properly only if the participating nodes cooperate in routing and forwarding. In this work, the question of how to enable a system to operate despite the presence of misbehavior node is considered. Node misbehavior due to selfish or malicious reasons or faulty nodes can significantly degrade the performance of mobile ad hoc networks. A new protocol called DUAL Factor is proposed to manage with misbehavior nodes. It considers two factors, Direct Factor and Distributed Factor, called DUAL Factor. The DUAL Factor protocol works as an extension to a reactive source-routing protocol for mobile ad-hoc networks. The performance analysis of DUAL Factor is done by comparing it to the standard DSR protocol. It shows that a network with DUAL Factor and up to 60% of misbehaving nodes behaves almost same as a caring network, in sharp contrast to a standard DSR network. All simulations have been implemented and performed in ASIM Simulator.

Key words: MANET, DSR routing protocol, DUAL factor routing protocol, ASIM simulator.