Abstrakt

PERFORMANCE IMPROVMENT OF TCP IN AD HOC NETWORK

Mr. Mohit Singh Tomar, Dr. Maneesh Shreevastava

Transmission Control Protocol (TCP) is the dominating end-to-end transport layer protocol which provides secure and reliable data transfer together with some other protocols in the protocol stack. Its performance is good in wired networks where packet losses are due to congestion. Recent works in transport protocols for ad-hoc networks have investigated the impact of ad-hoc network characteristics on TCP’s performance, and proposed schemes that help TCP overcome the negative impact of such characteristics as random wireless loss and mobility.. If standard TCP is applied on wireless networks its performance degrades. in this paper we contend that there are several other factors that influence TCP’s performance degradation. we contend that existing approaches to improve TCP performance over mobile ad-hoc networks have focused only on a subset of the factors affecting TCP performance. We identify a comprehensive set of factors, aimed at improving performance by reducing the number of route failures, predicting route failures before they occur and minimizing the latency for route error propagation. We show improves on the throughput performance of a default protocol.