Study Of Adaptive Multiple-target Route Discovery For Mobile Ad Hoc Networks

Mobile ad hoc networks (MANETs) have received considerable research interestsover the past decade due to the fact that they can be conveniently deployed withoutusing a fixed infrastructure. However, because of dynamic topology and limitedresources, it is challenging to design routing protocols for MANETs.To design a highly efficient new passive routing protocol, this paper deals with thecharacteristics of control traffic for the MANETs and presents a general model foranalyzing the characteristics of routing control traffic and the influences of changingnetwork parameters on these characteristics in mobile ad-hoc networks that useon-demand routing protocols. Using this model, we found that:1) there is an―stabilization‖process in the spread of control traffic in MANETs;2) clusters exist inmobile ad-hoc network;3) there are backbone nodes, serving as a gateway to relayRREQ packets between different clusters.On the basis of studies on the characters of control traffic in MANETs, we applythe carpooling to MANETs and propose adaptive multiple-target route discovery(A-MTRD) for on-demand routing protocols. A-MTRD aggregates multiple routerequests into one RREQ message and discovers multiple route targets simultaneously.A-MTRD improves routing performance by reducing the number of regular routingdiscoveries to reduce control overhead, congestion, and power consumption at nodes.