A Geographic Scheme with Location Update for Ad Hoc Routing

Because of the dynamic network topology, routing becomes a challenging problem in MANET. Many geographic schemes are proposed to improve routing performance but cause the challenges in geographic routing when deal with the topological problems such as a hole in the network and the location maintenances. In this paper we propose a geographic scheme with location update (GLU) for ad hoc routing. An ad hoc on demand routing protocol for MANET is also provided by applying GLU (AOR-GLU). AOR-GLU inherits topology based routing that only maintains an active route but repairs the route by using geographic scheme to prevent the cost of flooding. The proposed protocol adopts a destination oriented mechanism to maintain occupied locations and eliminates the additional overhead of a location service. The simulation results show that the proposed routing protocol is more efficient by achieving higher packet delivery ratio and producing less overhead in comparing with AODV, DSR and OGPR.