Performance Comparison of RAODV and MRAODV Routing Protocols in Mobile Ad Hoc Networks

In mobile ad hoc networks, mobile devices wander autonomously for the use of wireless links and dynamically varying network topology. AODV (Ad-hoc on-demand Distance vector routing) is a representative among the most widely studied on-demand ad hoc routing protocols. AODV and most of the on demand ad hoc routing protocols use single route reply along reverse path. Rapid change of topology causes that the route reply could not arrive to the source node, i.e. after a source node sends several route request messages, the node obtains a reply message, especially on high speed mobility. This increases both in communication delay and power consumption as well as decrease in packet delivery ratio. To avoid these problems, a reverse AODV was proposed which tries multiple route replies. The extended AODV is called reverse AODV (R-AODV), which has a novel aspect compared to other on-demand routing protocols on Ad-hoc Networks: it reduces path fail correction messages and obtains better performance than the AODV and other protocols have. In Modified Reverse Ad-Hoc On-demand Vector (MRAODV), the route request packet didn't change and it is like as AODV, but rout reply packet must be changed for route stability estimation purpose. By doing this we applied link stability in RAODV for decrease overhead of discovery and maintenance of routing. This protocol also increased the packet delivery ratio in mobile ad hoc networks.