Author
Seong-Cheol Kim
Bio: Seong-Cheol Kim is an academic researcher. The author has contributed to research in topics: Idle & Asynchronous Transfer Mode. The author has an hindex of 2, co-authored 3 publications receiving 109 citations.
Topics: Idle, Asynchronous Transfer Mode, Timeout, ATM adaptation layer, Server
Papers
More filters
TL;DR: The rules that the sources have to follow to achieve a fair and efficient allocation of network resources are explained.
Abstract: The available bit rate (ABR) service has been developed to support data applications over asynchronous transfer mode (ATM) networks. The network continuously monitors its traffic and provides feedback to the source end systems. This article explains the rules that the sources have to follow to achieve a fair and efficient allocation of network resources.
99 citations
TL;DR: In this article, the authors show that ABR scales well with a large number of bursty TCP sources in the system, which raises the possibility of large switch queues if the source rates are not controlled by ABR.
Abstract: We model World Wide Web (WWW) servers and clients running over an ATM network using the ABR (available bit rate) service. The WWW servers are modeled using a variant of the SPECweb96 benchmark, while the WWW clients are based on a model by Mah. The traffic generated by this application is typically bursty, i.e., it has active and idle periods in transmission. A timeout occurs after given amount of idle period. During idle period the underlying TCP congestion windows remain open until a timeout expires. These open windows may be used to send data in a burst when the application becomes active again. This raises the possibility of large switch queues if the source rates are not controlled by ABR. We study this problem and show that ABR scales well with a large number of bursty TCP sources in the system.
8 citations
01 Jan 1997
TL;DR: This research presents a probabilistic procedure to estimate the probability that a central nervous system disorder, known as a “spatially aggregated immune attack,” will occur during the natural course of a person’s development.
Abstract: Bobby Vandalore, Shivkumar Kalyanaraman, Raj Jain, Rohit Goyal, Sonia Fahmy The Ohio State University, Department of CIS Columbus, OH 43210-1277 Phone: 614-688-4482, Fax: 614-292-2911 Email: fvandalor, shivkuma, jain, goyal, fahmyg@cis.ohio-state.edu Seong-Cheol Kim Principal Engineer, Network Research Group, Communication Systems R&D Center Samsung Electronics Co. Ltd., Chung-Ang Newspaper Bldg. 8-2, Karak-Dong, Songpa-Ku, Seoul, Korea 138-160 Email: kimsc@metro.telecom.samsung.co.kr Abstract
2 citations
Cited by
More filters
01 May 1998
TL;DR: An underlying theme of this paper is that increased interaction between the video and network design has potential for improving overall decoded video quality without changing the network capacity.
Abstract: The authors examine the transport and storage of video compressed with a variable bit rate (VBR). They focus primarily on networked video, although they also briefly consider other applications of VBR video, including satellite transmission (channel sharing), playback of stored video, and wireless transport. Packet video research requires careful integration between the network and the video systems; however, a major stumbling block has resulted because commonly used terms are often interpreted differently by the video and networking communities. The paper then, has two main goals: (i) to clarify the definitions of terms that are often used with different meaning by networking and video-coding researchers and (ii) to explore the tradeoffs entailed by each of the various modalities of VBR transmission (unconstrained, shaped, constrained, and feedback). In particular, they evaluate the tradeoff among the advantages (better video quality, less delay, and more calls) that were identified by early proponents of VBR video transmission. An underlying theme of this paper is that increased interaction between the video and network design has potential for improving overall decoded video quality without changing the network capacity.
270 citations
15 Jan 1996
TL;DR: In this report (written in Greek), the basics of the hypertext transfer protocol are presented.
Abstract: In this report (written in Greek) are presented the basics of the hypertext transfer protocol.
244 citations
Posted Content•
TL;DR: In this paper, the authors proposed an explicit rate indication scheme for congestion avoidance in ATM networks, where the network switches monitor their load on each link, determining a load factor, the available capacity, and the number of currently active virtual channels.
Abstract: We propose an explicit rate indication scheme for congestion avoidance in ATM networks. In this scheme, the network switches monitor their load on each link, determining a load factor, the available capacity, and the number of currently active virtual channels. This information is used to advise the sources about the rates at which they should transmit. The algorithm is designed to achieve efficiency, fairness, controlled queueing delays, and fast transient response. The algorithm is also robust to measurement errors caused due to variation in ABR demand and capacity. We present performance analysis of the scheme using both analytical arguments and simulation results. The scheme is being implemented by several ATM switch manufacturers.
242 citations
TL;DR: In this article, an explicit rate indication for congestion avoidance (ERICA) scheme for rate-based feedback from asynchronous transfer mode (ATM) switches is described. But the scheme is designed to achieve high link utilization with low delays and fast transient response and is also fair and robust to measurement errors caused by the variations in ABR demand and capacity.
Abstract: This paper describes the "explicit rate indication for congestion avoidance" (ERICA) scheme for rate-based feedback from asynchronous transfer mode (ATM) switches. In ERICA, the switches monitor their load on each link and determine a load factor, the available capacity, and the number of currently active virtual channels. This information is used to advise the sources about the rates at which they should transmit. The algorithm is designed to achieve high link utilization with low delays and fast transient response. It is also fair and robust to measurement errors caused by the variations in ABR demand and capacity. We present performance analysis of the scheme using both analytical arguments and simulation results. The scheme is being considered for implementation by several ATM switch manufacturers.
230 citations
TL;DR: Two extensions of the Erlang multi-rate loss model (EMLM) are reviewed, whereby the call-level quality-of-service (QoS) of ATM networks is assessed and the connection-dependent threshold model (CDTM) is proposed, which resembles the threshold models, but the state dependency is individualized among call-connections.
93 citations