EJTCP: Enhanced Jitter-based TCP for Wireless Broadband Network

• Main Authors: Gui-Kui Chang, 張桂魁
• Other Authors: Eric Hsiao-Kuang Wu
• Format: Others
• Language: en_US
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/56709092553405171397

碩士 === 國立中央大學 === 資訊工程研究所 === 93 === TCP is the most important and widely used transport protocol at present, and it can work well over the purely wired network. But in virtue of expanding of wireless network in the recent years, TCP must transfer its working environment form purely wired link to wired-cum-wireless network. As a result of high bit error rate (BER) in wireless, TCP halves down its congestion window unnecessarily caused by random packet loss event regularly, and the performance is really bad in wireless network. The problem about differentiating loss has been investigated for a long time and many schemes were proposed to solve this problem. JTCP has better performance among those schemes. Unfortunately, even if those schemes can judge correctly, some events may occur to make TCP timeout. To solve this problem, we amend JTCP scheme and propose a smooth transmission scheme to increase the correctness of loss distinction and avoid burst transmission. We also propose a scheme to deal with modulation changing in 802.16. The experimental results show that our scheme, enhanced JTCP (EJTCP), unrolls better performance than other algorisms over wired-cum-wireless network.