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Limited Indirect Acknowledgement for TCP Performance Enhancement over Wireless Networks  

김윤주 (이화여자대학교 컴퓨터학과)
이미정 (이화여자대학교 컴퓨터학과)
안재영 (한국전자통신연구원 무선방송연구소)
Publication Information
Journal of KIISE:Information Networking / v.30, no.2, 2003 , pp. 233-243 More about this Journal
Abstract
With the original Transmission Control Protocol(TCP) design, which is particularly targeted at the wired networks, a packet loss is assumed to be caused by the network congestion. In the wireless environment where the chances to lose packets due to transmission bit errors are not negligible, though, this assumption may result in unnecessary TCP performance degradation. In this paper, we propose three schemes that improve the ability to conceal the packet losses in the wireless network while limiting the degree of violating TCP end-to-end semantics to a temporary incidents. If there happens a packet loss at the wireless link and there is a chance that the loss is noticed by the sending TCP, the proposed schemes send an indirect acknowledgement. Each of the proposed schemes uses different criteria to decide whether there is a chance that the packet loss occurred in the wireless part is noticed by the sender. In order to limit the buffer overhead in the base, the indirect acknowledgements are issued only when the length of buffer is less than a certain threshold. We use simulation to compare the overhead and the performance of the proposed schemes, and to show that the proposed schemes improve the TCP performance compared to Snoop with a limited amount of buffer at the base station.
Keywords
TCP; Snoop; I-TCP; Indirect-ACK; wireless network;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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