Reactive Robust Routing with Opportunistic Large Arrays
Lakshmi V. Thanayankizil, Mary Ann Ingram · 2009
An opportunistic large array (OLA)-based reactive routing protocol, which we call OLA routing on-demand (OLAROAD), is investigated for mobile ad hoc networks for varying node densities. An OLA is a simple form of cooperative transmission (CT) in which a group of simple relays or forwarding nodes operate without any mutual coordination, but naturally fire together in response to energy received from a single source or another OLA. OLAROAD incorporates CT into both route discovery and data transmission. It avoids the overhead involved in finding a conventional multi-hop route and individual addressing of relay nodes, which are problems of the other CT-based routing schemes. Through extensive simulations using the random way point mobility model, we show that the packet delivery ratio (PDR) and latency of OLAROAD doesn 't change with density whereas a traditional multi-hop scheme like AODV incurs much more overhead and delay as the density increases. We also compare the end-to-end delays where we take into account the delay due to route breakages and also the delay in data transmission.