TCP congestion control with delay minimization in MANET

Abstract

In Mobile Ad hoc Networks (MANET), mobile nodes are organized randomly without any fix access point. Due to the limited bandwidth and dynamic topology of nodes, the network congestion occurs. Congestion control is the main problem in ad-hoc networks. Congestion control is associated to controlling traffic incoming into a telecommunication network. The end-to-end Transmission Control Protocol (TCP) performance degrades rapidly with increase load in number of hops. This is one of the biggest problems of TCP over wireless networks. In this research work, we proposed to develop the Effective TCP Congestion Control AODV routing which consists of congestion monitoring on the basis of queue length and rate control. The overall congestion status is measured in congestion monitoring. In route establishment, we propose congestion control in the particular channel, queue length of packet, traffic rate based overall congestion standard, packet loss rate and packet dropping ratio to monitor the congestion status. Based on the congestion standard, the congestion less based routing is established to reduce the packet loss, high overhead, long delay in the network. By extensive simulation, the proposed scheme achieves better throughput, packet delivery ratio, low end-to-end delay and overhead than the normal TCP based AODV routing.