An Efficient Adaptive Position Update for Geographic Routing in MANET

Abstract—Routing of packets in mobile ad hoc networks with a large number of nodes or with high mobility is a very difficult task. In geographic routing, nodes need to maintain up-to-date positions of their immediate neighbors for making effective forwarding decisions. To achieve the requirement of up-to-date location information, many location update schemes have been proposed. Periodic broadcasting of beacon packets that contain the geographic location co-ordinates of the nodes is a popular method used by most geographic routing protocols to maintain neighbor positions. Some routing protocols do not require the proactive transmission of control messages which saves network resources. An Adaptive Position Update (APU) strategy is implemented which dynamically adjusts the frequency of position updates based on the mobility dynamics of the nodes and the forwarding patterns in the network. Setting the periodicity of checking location according to the mobility, can make the existing scheme more efficient. Mobility prediction is used differently for finding a node's own location and that of its neighbors. Keywords—Geographic routing; Periodic broadcasting; Adaptive Position Update; Mobility Prediction I