전자공학회논문지T (Journal of the Korean Institute of Telematics and Electronics T)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

다중 VBR 소스를 갖는 TCP over UBR-EPD의 특성

The Behavior of TCP over UBR-EPD with multiple VBR source

  • 이진우 (建國大學校 電子工學科) ;
  • 김진태 ((株)네오게이트 附設硏究所) ;
  • 유영길 (大林大學 電子情報通信科)
  • Lee, Jin-Woo (Dept. of Electronics, Kon Kuk University) ;
  • Kim, Jin-Tae (Research Center of Neogate Co.) ;
  • Yoo, Young-Kil (Dept. of Electronics, Imformation & Communication, Daelim College)
  • 발행 : 1999.12.01
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초록

The Asynchronous Transfer Mode(ATM) networks are being adopted as backbones over various parts of Internet. TCP is one of the most widespread transport protocols and can be used with ATM. But, TCP shows poor end-to-end performance on ATM networks. Effective throughput of TCP over ATM can be quite low when cells are dropped at the congested ATM switch. As congested link transmits cells from corrupted packets, it wastes bandwidth and throughput becomes low. This paper examines the behavior of TCP over ATM-UBR using EPD switch in a broadband environment. As threshold value closes to the buffer size, the buffer can be used more efficiently, but more drops and retransmission occur. If the threshold value is much less than buffer size, efficiency becomes low, but few drops can be happen. Therefore, the decision of threshold value becomes important factor.

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