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RISS 인기검색어
- 검색키워드
- 저자 : Euiyul Ko (검색결과 3 건)
- 무료
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- 유료
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Congestion control for sudden bandwidth changes in TCP
Ko, Euiyul,An, Donghyeok,Yeom, Ikjun,Yoon, Hyunsoo John Wiley Sons, Ltd 2012 International journal of communication systems Vol.25 No.12
<P><B>SUMMARY</B></P><P>In this paper, we propose a novel technique to deal with sudden bandwidth changes in transmission control protocol (TCP). In the current Internet, sudden bandwidth changes may occur because of vertical handovers between heterogeneous access networks, routing path changes, cognitive ratio, and multi‐rate wireless local area network. The current implementation of TCP is designed and optimized for stable networks and does not adapt well upon sudden bandwidth changes. Consequently, it might suffer from packet losses in burst upon sudden bandwidth decrement and under‐utilization upon sudden bandwidth increment. To resolve this problem, we propose to modify the current TCP algorithm to include a new phase, called fast adaptation (FA). The FA phase is triggered upon detecting sudden bandwidth changes, and a TCP sender in the FA phase attempts to recover lost packets quickly to avoid spurious timeouts upon sudden bandwidth decrement. Upon sudden bandwidth increment, it increases its window size drastically to realize full utilization. Through extensive simulations, experiments, and analysis, it is shown that the proposed scheme can effectively deal with sudden bandwidth changes. Copyright © 2011 John Wiley & Sons, Ltd.</P>
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A decentralized approach for topology discovery in home netwo
Euiyul Ko,Ikjun Yeom IEEE 2006 IEEE TRANSACTIONS ON CONSUMER ELECTRONICS - Vol.52 No.3
<P>As electronic home appliances become smart, there have been many attempts to connect these appliances with a network. Accordingly, a concept of home networks has been emerged. Since most home network users do not have experiences or knowledge of network management, home networks have to be easily managed with minimal efforts of users. This paper presents a novel system for topology discovery and management in home networks. This system is fully distributed and automatically discovers topology information with minimal user configuration. It considers heterogeneous network media such as Ethernet, WLAN, and IEEE 1394. It also provides QoS information by measuring available bandwidth. We have implemented this system on Linux and present experiment results to show the effectiveness of the system</P>
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