AN APU BASED UPDATION SCHEME WITH ADDED SECURITY MEASURES

Abstract

Routing with the use of location information has become one of the most suitable routing strategies in wireless mobile ad hoc network mainly due to its scalability.  Position information of the nodes is primary requirement in geographic routing.  Nodes for forwarding are selected among neighbors based on their location. Each node in the network should be aware of its neighbor’s location in order to maintain the accuracy of local topology. Hence updation of location information through beacon is necessary. Existing mechanisms invokes periodic beacon update scheme which in turn consumes the network resources specifically when the network traffic is high it leads to packet loss and at times causes retransmission of data packet  .In this work, adaptive position update is proposed which dynamically adjusts the beacon updation frequency according to the varying network conditions. APU is based on two simple principles nodes which moves with greater speed and nodes closer to forwarding paths update their positions more frequently (and vice versa).