A Geographic Scheme with Location Update for Ad Hoc Routing

Because of the dynamic network topology, routingbecomes a challenging problem in MANET. Many geographicschemes are proposed to improve routing performance butcause the challenges in geographic routing when deal with thetopological problems such as a hole in the network and thelocation maintenances. In this paper we propose a geographicscheme with location update (GLU) for ad hoc routing. An adhoc on demand routing protocol for MANET is also providedby applying GLU (AOR-GLU). AOR-GLU inherits topologybased routing that only maintains an active route but repairsthe route by using geographic scheme to prevent the cost offlooding. The proposed protocol adopts a destination orientedmechanism to maintain occupied locations and eliminates theadditional overhead of a location service. The simulationresults show that the proposed routing protocol is moreefficient by achieving higher packet delivery ratio andproducing less overhead in comparing with AODV, DSR andOGPR.