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채기준,도인실,Chae, Gi-Jun,Do, In-Sil 한국정보처리학회 1995 정보처리논문지 Vol.2 No.6
ATM 포럼에서는 버스트 특성이 높고 그 크기를 예측하기 힘든 트래픽 특성을 가진 ABR 트래픽을 새로이 정의하였다. 이 트래픽은 지연보다 손실에 더 민감한 특성을 가지 므로 셀의 손실을 최소화하여 패킷을 재전송하는 경우를 최소화하는 것이 바람직하다. ATM 포럼에서는 ABR트래픽 제어를 위해 율기반 (rate-based)제어 방식인 EPRCA알고리 즘을 채택하였다. 본 논문에서는 이 EPRCA 알고리즘과 BECN, BP 등과 같은 피이드백 제어 방법을 조합한 형태의 제어 방식을 제안한다. 이러한 조합형태의 제어 방식은 ABR 트래픽을 좀더 효율적으로 제어할 수 있고 파라미터 값을 적절히 제어함으로써 효율성을 더욱 높일 수 있음을 시뮬레이션을 통하여 보인다. ATM Forum has defined a new service class for data applications called Available Bit Rate(ABR) Service, which has highly bursty traffic and unpredictable burst size. It is desirable that we reduce the probability of retrans mission of packets by minimizing the loss of cells because the traffic is much more sensitive to loss than delay. The Forum has also selected the Rate-Based Control for the ABR service and proposed EPRCA as the control mechanism for the service. This paper proposes the combination of EPRCA and the other feedb ack control mechanisms such as BECN and BP. The combined control mechanism control ABR traffic more efficiently and the simulation results show that the network performance can be improved by choosing the appropriate parameters.
채기준 이화여자대학교 한국문화연구원 1994 韓國文化硏究院 論叢 Vol.64 No.2-3
In the second half of the 1970s, advanced computer and workstation users began to realize that a local communication system was required to interconnect diverse data processing equipment to enable better sharing of the resources available in an establishment. This idea led to the development of what has become known as local area networks (LANs). The main features of a LAN are its high speed or bandwidth and the fact that the communications channel is shared by all the devices on the network. With these features, the local area network allows computer users to share data resources and hardware devices and to communicate with each other. It also changes a desktop computer from an isolated machine into a rich environment with a wealth of information and resources. Because of these benefits, computer networks are recently installed in the university to provide better quality of service on administration, education and research to professors, administrators and students. In this paper, necessity of campus network is described from viewpoints of users, technical particularity of network and national trend. In addition, the following requirements and considerations for network construction are depicted. - Connection Requirements - Geographical Layout - Pre-existing Conditions - Topology, Transmission Medium and Protocol - Cost and Performance - Security - Network Management System - Network Operating System - Database Management System - Extendibility Ewha Womans University campus network (Ewha-Net) which is currently constructed is presented as an example of campus network and use of campus network is described in this paper.
정보통신 : ATM 망에서 ABR 트래픽의 폭주제어 방법
채기준(Chae Ki Joon),도인실(Doh In Shil) 한국정보처리학회 1995 정보처리학회논문지 Vol.2 No.6
ATM Forum has defined a new service class for data applications called Available bit Rate(ABR) Service, which has highly bursty traffic and unpredictable burst size. It is desirable that we reduce the probability of retransmission of packets by minimizing the loss of cells because the traffic is much more sensitive to loss than delay. The Forum has also selected the Rate-Based Control for the ABR service and proposed EPRCA as the control mechanism for the service. This paper proposes the combination of EPRCA and the other feedback control mechanisms such as BECN and BP. The combined control mechanism controls ABR traffic more efficiently and the simulation results show that the network performance can be improved by choosing the appropriate parameters.