Enhancement in AOMDV Routing Protocol to Overcome Congestion Problem in MANET

Abstract

The congested node uses the routing protocol to broadcast itself as having the shortest route to the node whose packet it wants to source node since the MANET has no authorized system. Due to the disruption of the congested node, it exposes too many drop of packet without reaching to the destination node that leads to collapse the network integrity, reliability, and availability in the network while the sender node sends to the destination node. Many researchers have proposed protocols that enhance the AOMDV which are deal with the congestion overcome in the network. This paper discusses the enhancements of the AOMDV based on congestion control protocols in MANETs. The COAOMDV is the enhanced AOMDV based on congestion control protocols which compacts with the congestion overwhelmed protocol; and compared with the AOMDV protocols. In order to resolve this problem, this thesis work was subjected to evaluate the impact of congested node, and to minimize its consequence in enhancing AOMDV by identifying the congested node using higher sequence number to improve the performance of MANET. These protocols are simulated on NS2.35 by varying the size of nodes and simulation time. The analysis of this protocol is done with AOMDV by calculating the values for four performance metrics, namely, throughput, packet delivery ratio, Packet loss; and average of end-to-end delay. Our investigated results exhibit that the COAOMDV improves the throughput by 0.1794698 and 0.325479 kbps for 35 nodes and 100s respectively; the PDR by 50.6333333 and 31.736 % for 100s and 35 nodes respectively; the AE2ED by 301.356 and 44.04ms for 35 nodes and 100s respectively; the packet loss by 1,612.8 and 3,458 packets for 35 nodes and 100s respectively in average for the above variation. This regards the performance of AOMDV protocol to overcome congestion problem in MANET is improved using the proposed approach.