TCP performance enhancement over IEEE 802.11

Transmission Control protocol (TCP) establishes a connection between two host computers in a virtual network and exchanges streams of data. TCP ensures that transfer of data and packets will be delivered in the same order as they were sent. The network topology is designed in a wireless network environment which is IEEE 802.11. TCP is a connection-oriented, end-to-end reliable protocol which is existing in our network topology. In this simulation the total number of nodes is 10. Reno, New Reno are generally used in a network topologies to control congestion. But in these cases Packet Delivery Fraction (PDF) is not sufficient, delay is high, packet loss is also high as it takes longer time to detect and recover packet loss. In order to improve retransmission scheme we propose an updated version of New Reno. It does not have to wait for 3 duplicate acknowledgements, thus it can retransmit faster and doesn´t reduce the window size too much prematurely. For evaluating this performance we use NS-2.34 which is the most suitable network simulator in wired and wireless network environment.