Design of TCP Throughput Optimization in Wireless Environment

• Main Authors: Yung-Kai Chiu, 邱永凱
• Other Authors: 孫雅麗
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/09279570343369565296

碩士 === 國立臺灣大學 === 資訊管理學研究所 === 92 === With the emergence of wireless technologies, many relevant issues come along with it. Because of the essential differences between the characteristic of wired and wireless network, some traditional protocols need to be reviewed in more detail. TCP is particularly important among these. The main problem is that the congestion control mechanism in the design of TCP deems all packet losses as the result of the congestion. But, in fact, the error packet loss during communication comes from the high error rate of wireless environment. Whenever the TCP sender receives a loss event, it tends to conclude that the packet loss as a kind of congestion packet loss which comes from congestion, and tries to reduce the congestion window size, and therefore reduce the throughput. In this thesis, we propose an algorithms to optimize the TCP throughput in wireless environment. We define our problem as follow: “In a wireless environment, how to optimize the throughput of TCP Reno and TCP New Reno downstream flow by modifying the wireless AP only.” In the last part of our thesis, we will utilize the NS2 for system experiments verification and comparison, and discuss, conclude our contributions along with further works.