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TAS: TCP-Aware Sub-layer over IEEE 802.11-based wireless LANs  

Choi, Nak-Jung (서울대학교 전기컴퓨터공학부)
Jung, Ha-Kyung (서울대학교 전기컴퓨터공학부)
Ryu, Ji-Ho (서울대학교 전기컴퓨터공학부)
Seok, Yong-Ho (서울대학교 전기컴퓨터공학부)
Choi, Yang-Hee (서울대학교 전기컴퓨터공학부)
Kwon, Tae-Kyoung (서울대학교 전기컴퓨터공학부)
Publication Information
Journal of KIISE:Information Networking / v.33, no.5, 2006 , pp. 355-368 More about this Journal
Abstract
This paper introduces a new split-TCP approach for improving TCP performance over IEEE 802.11-based wireless LANs. TCP over wireless LANs differently from wired networks is not aggressive, which is a fundamental reason for poor performance. Therefore, we propose TAS (TCP-Aware Sub-layer) to migigate this problem. Our scheme extends the split-connection approach that divides a connection into two different connections at a split point such as an access point (AP). Using TAS, a wireless node emulates TCP ACK packets using MAC ACK frames, instead of receiving real TCP ACK packets. We compared TAS with both normal TCP and I-TCP (Indirect TCP) by NS2 simulation. Results show that TAS achieves higher throughput, more fair resource allocation and, in power-saving mode, shorter delays.
Keywords
split-connection; IEEE 802.11; TCP; flow control; congestion control; fairness;
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