A Comparative Study of TCP over MANET with Variable Speed

Mobile Ad hoc networks are wireless network that use multi-hop routing instead of static networks infrastructure to provide network connectivity. The network topology in MANETs usually changes with time. Transmission Control Protocol (TCP) is a connection oriented protocol for reliable end-to-end data delivery over IP networks. Wireless Mobile Ad-hoc networks offer challenges to TCP congestion control mechanism because mobile Ad-hoc networks encounter several types of losses or delays that are not related to congestion such as high BER, delays due to reordering of packets. Several approaches have been proposed to deal with this issue that can be categorized to either end system based or network assisted. This paper present a comprehensive TCP performance evaluation study to understand the nature of the TCP performance in different scenarios in mobile Ad-hoc network.