Abstract: Multipath routing in MANET is a way of utilizing multiple alternative paths in the network, which can provide a variety of benefit like preventing delays due to stale routes, increased available bandwidth on different links etc as compared to the protocols like DSR and AODV. In the present paper, the various existing multipath routing techniques for MANET have been elaborated along with their weak zones. This paper also introduces Ant colony based energy efficient multipath routing (ACBEEMR) technique. The ACBEEMR uses pheromone probability function to decide the next node in the network.

Keywords: Multipath, Routing, On demand, Proactive, energy efficient.