Congestion Control in Multi-Flow Environment Using Multipath Routing Base in MANET

Abstract: The multipath route establishment uses the method that discovers multiple multi hops communication between source and destination. Multi-path routing can balance the load better than the single path routing in ad hoc networks, thereby reducing the congestion by dividing the traffic in several paths. This research presents a new approach of Multipath Load Balancing with AOMDV routing protocol and Dynamic Queue based congestion control mechanism for avoiding congestion in network communication flows. In this scheme the store and forwarding capability of nodes are enhanced by varying the queue length according to incoming data. The AOMDV protocol performance is also enhanced to increment the link expiration time after failure the current connection establishment in network. The new connection is established according to the new link expiration time value, by that the possibility of link failure in AOMDV is also minimizes. It means the multipath routing performance in this technique has increases the link expiration time with vibrant queue length method. The multipath routing has no doubt better than the unipath routing and balance the load by proving the alternative path if the already established path are congested. But the performance of AOMDV is improves after adding the proposed scheme. The performance of normal AOMDV is measured on the basis of load handling capability of nodes in network and through performance matrices. The simulation of both the routing techniques is done in ns-2 simulator.

Keywords: Congestion Multipath routing, Dynamic queue, Link expiration time, load balancing.