Quality of Service Assurance in Mobile Ad-Hoc Networks

Mobile ad-hoc network (MANET) is a peer-to-peer wireless network. They are self-configuring, capable of self-directed operation and hastily deployable. In MANET nodes communicate with each other without the use of topology. Nodes are itinerant, topology can be very dynamic and nodes must be able to relay traffic because corresponding nodes might be out of range. The dynamic nature of MANET makes network open to attacks and unreliability. Routing is always the most noteworthy element for any networks. Node misbehaviour due to selfish or malicious intention could significantly degrade the performance of MANET. We focus on trust management framework, which is intended to cope with misbehaviour problem of node and increase the performance of MANETs. A trust-based system can be used to track this misbehaving of nodes, spot them and isolate them from routing and provide reliability. In this paper a Trust Based Reliable AODV [TBRAODV] protocol is presented which implements a trust value for each node. For every node trust value is calculated and based trust value nodes are allowed to participate in routing or else identified to become a misbehaving node. This augments reliability in AODV routing and results in increase of PDR, decrease in delay and maintains throughput. This work is implemented and simulated on NS-2.