A Novel Approach for Improving the Performance of TCP by TCP Reno and SACK Acknowledgement in high traffic density conditions with cognitive radios

The key factors that contribute to TCP’s performance degradation as TCP losses, MAC link f ailure detection latency, Route computation time and , Li nk failure notification latency Transmission Control Protocol (TCP) is the dominating end - to - end transport layer protocol which provides secure and reliable data transfer with some other protocols. W e identify the key factors that contribute to TCP’s performance with evaluate the congestion control algorithms in Reno, Vegas and SACK TCP from different aspects. In this review paper, we contend that existing approaches to improve TCP performance over mo bile ad - hoc networks have focused only on a subset of the factors affecting TCP performance by SACK and TCP. For Effective resource utilization, such retransmission rate , bandwidth utilization, and packet window size, is compared . Our objective to improve the performance of TCP Reno, TCP Vegas and TCP SACK from many aspects of the both TCP Vegas and TCP SACK make some performance improvements to TCP Reno. and this paper is also concern fair resource allocation from two main categories, one is competition be tween different TCP congestion control algorithms and the other is fairness between different delay links.