Nae Soo Kim, Jung Gil Song

The Transactions of the Korea Information Processing Society (1994 ~ 2000), Vol. 7, No. 8, pp. 2679-2687, Aug. 2000
10.3745/KIPSTE.2000.7.8.2679,   PDF Download:

Abstract

In order to provide the TCP/IP based applications over satellite ATM network, more detailed affects and analysis for the transmission performance according to the long propagation delay and burst error characteristics of satellite link are required. And its performance objectives should be proposed. In this paper, we implemented the real terrestrial/satellite ATM LANE(LAN Emulation) using 2Mbps KOREASAT link, and analyzed and evaluated the affects of transmission performance of TCP/IP traffic and FTP with changing the Eb/No of satellite channel, TCP socket buffer size and the sending message size. In addition we performed the analysis of transmission quality and the transfer message characteristics for IPoA(IP over ATM) videoconference service. From this study, we can see that TCP total performance is also increased when TCP socket buffer size is increased, but the real maximum transmission rate can not reach to a theoretical object value because of the limited maximum window size and the error characteristic of satellite channel. Also TCP/IP over ATM services are almost impossible because the maximum transmission performance is dropped to 50% below at Eb/No=6dB over 2Mbps satellite link. In case of FTP with the small size of file, we can also see that the slow start mechanism of TCP/IP is not proper in point of the efficiency of bandwidth utilization because file transfer is completed before to reach at the maximum transmission rate. Furthermore we can see that the video image of IPoA videoconference service is almost frozen at Eb/No=6.5dB below, and the mean message transfer time is exceeded to the required ITU objectives, which is impossible to provide the service.

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