Routing Misbehavior in MANets and How it Impact QoS

Mobile Ad hoc Network is a collection of mobile nodes without support of any infrastructure. Routing in mobile ad hoc networks is achieved through mobile nodes acting as intermediate nodes. These nodes are responsible for receiving and forwarding data packets from one host to another in the network. Routing protocol in present mobile ad hoc network could be of two types: One, is Proactive routing which maintain routes to all nodes, including nodes to which no packets are sent (i.e., based on either link-state or distance vector principles) and other, is reactive routes establishments i.e., routes between nodes, are determined only when explicitly needed to route packets. Reactive routing algorithm is also known as On-Demand Routing algorithm. Routing misbehavior occurs when nodes agree to forward but some nodes agree and do not forward packets as the node is misbehaving, selfish, overloaded, broken or the software fault is present. Misbehaving nodes are significant problem in MANets which severely effect the QoS mechanism of network.