Link failure prediction QoS routing protocol for manet

In the routing of mobile ad hoc networks (MANET), frequent link breaks occur in the path due to unrestricted node mobility and node failures which violate the quality of service (QoS) requirements. In this paper, we propose a new routing algorithm called link failure prediction QoS routing (LFPQR) protocol. LFPQR predicts the future state of a node to decide whether the node is a good selection as a router or not. The future prediction heuristic depends on the mobility and power level of a node. In LFPQR, the packet loss and end-to-end packet delay are reduced. The algorithm selects more stable paths and hence QoS requirements could be satisfied. The proposed algorithm outperforms not only when the nodes are in high mobility conditions but also at frequent node failures. We have done the simulation using ns-2.28 and the simulation results show the efficiency of the algorithm.