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A Study on Local Retransmission Timeout of AT-Snoop Protocol  

Cho Yong bum (한국항공대학교 대학원 정보통신공학과 통신시스템 연구실)
Cho Sung joon (한국항공대학교 항공전자 및 정보통신공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.4B, 2005 , pp. 218-225 More about this Journal
Abstract
Although Snoop protocol can enhance TCP throughput efficiently in a wired-cum-wireless environment, it has a problem in performing local packet retransmissions under a burst error-prone wireless link. AT-Snoop protocol is proposed to cope with this Snoop protocol's problem by adopting adaptive timer. In this paper, TCP throughputs of AT-Snoop protocol have been analyzed with varying wireless link conditions and the ways of setting parameters of AT-Snoop protocol for higher TCP throughput are found out through computer simulations. From the simulation results, AT-Snoop protocol's two parameters, local retransmission threshold value and local retransmission timeout value, are closely related with the fading changing rate. To get higher TCP throughput, local retransmission threshold value and local retransmission timeout value should be set to a little bit larger values than average WSRTT(Wireless Smoothed Round Trip Time) and mean bad period of the wireless link, respectively.
Keywords
Snoop; fading, TCP; retransmission; throughput;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 H. Balakrishnan, V. N. Padrnanabhan, S. Seshan, and R. Katz, 'A comparison of mechanisms for improving TCP performance over wireless links,' ACM/IEEE Transactions on Networking, vol.5, pp. 756-769, December 1997   DOI   ScienceOn
2 A.Chockalingam and G. Bao, 'Performance of TCP/RLP protocol stack on correlated fading DS-CDMA wireless links,' IEEE Trans. on Vehicular Tech., vol. 49, pp. 28-33, 2003   DOI   ScienceOn
3 주재옥, 노재성, 조성준, '모바일 네트워크에서 TCP 전송율 향상을 위한 Adaptive Timer-Snoop 프로토콜,' Telecommunications Review, 제14권, 4호, pp. 711-731, 2004
4 K. Ratman and I. Matta, 'Effect of local retransmission at wireless access points on the round trip time estimation of TCP,' in Proc. of 31st Annual Simulation Symposium, pp. 150-156, April 1998
5 M. Zorzi, A. Chockalingam, and A. R. Rao, 'Throughput analysis of TCP on channels with memory,' IEEE Journal of Selected Areas in Communications, vol. 18, no. 8, July 2000
6 M. Zorzi, R. R. Rao, and L. B. Milstei, 'On the accuracy of a first-order Markov model for data transmission on fading channels,' in Proc. of ICUPC'95, pp. 211-215, November 1995
7 VINT Project, 'The Network Simulator ns- 2,' http://www.isi.edu/nsnam/ns
8 조용범, 원기섭, 김영철, 조성준, '2.3GHz 휴대인터넷 무선 링크에서 페이딩 변화에 따른 snoop 프로토콜의 성능 분석,' 한국통신학회 2004년도 하계종합학술발표회 논문초록집, p. 143
9 H. Balakrishnan, S. Seshan, and R. H. Katz, 'Improving reliable transport and handoff performance in cellular wireless networks,' ACM Wireless Networks, vol. 1, no. 4, December 1995