Mobile Ad-hoc network's routing protocol AODV Functioning Procedure

Ad hoc On-demand Distance Vector (AODV) is a reactive routing protocol in which the network generates routes at the start of communication. AODV has been developed specially for MANET. It obtains the routes purely on-demand which makes it a very useful and desired algorithm for MANETs. AODV use two different operations to find and maintain routes: the route discovery process operation and the route maintenance operation. There are four messages used in AODV to control the process of route discovery and route maintenance. In this paper the control messages that used in AODV; RREQ, RREP and RERR; are classified, and the process of how AODV routing protocol is working was investigated as well as explain the reasons for why the AODV is the most desirable protocol for MANET environment.