Park Jin Yang, Lee Yong Hun, Kim Jeong Ho, Rhee Sang Burm

The Transactions of the Korea Information Processing Society (1994 ~ 2000), Vol. 4, No. 1, pp. 215-223, Jan. 1997
10.3745/KIPSTE.1997.4.1.215,   PDF Download:

Abstract

The advantages of service in satellite links are representatively a long distance and large capacity transfer and simultaneous communication. And terrestrial links are methods of high speed and high quality data transfer. Therefore a combined form of characteristics of satellite and terrestrial links is desirable to furnish a good quality service to subscribers. And in satellite links an analysis method and a simulation method of file transfer are conducted to evaluate the efficiency of file transfer. The parameters are used the message length and transmission time, and the number of chain record and transmission time. From the results of evaluation, in satellite links, it is found that when the message length is shorter than 512 bytes, the file transmission time becomes extremely long and when the message length is set at 1024 bytes, the file transmission time abruptly increase from 2048 bytes. Also it is confirmed that when the number of chain record is under 15, the file transmission time becomes extremely long and if the number increase up to 90, the time becomes gradually short and over 90, it becomes constant. Therefore, from the result of file transmission in the case of utilizing satellite links, it is confirmed that the optimum message length in the minimum transmission time is present closely at 1024 bytes. Also it is confirmed that when the satellite transmission speed becomes smaller from 24 kbps to 2400 bps, the optimum message length also becomes smaller form 640 bytes to 256 bytes.

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