Improved Routing Protocol for MANET

Mobile ad-hoc network is defined as the nodes are communicate with each other without any fixed network. Here nodes are itself act as the router. In manet nodes are in movable format that means they change network topologies time to time as they change their position. In manet congestion is main issue. When many number of nodes transmitted packets across the network then network increases congestion which may leads to packets losses. In the existing work there is no phenomena to handle the congestion effectively. The proposed system modifies the existing AODV algorithm by using congestion control phenomena. In this system the node waits for acknowledgement for the threshold period of time. If the acknowledgement not received with in threshold period then the node broadcast again to select alternate path. This paper discuss the congestion control using EAODV. Here we analyze the performance of proposed system which is better than existing system by using various performance parameters on different number of nodes namely packet delivery ratio, end to end delay, packet loss ratio.