Operation of higher layer data communication protocols over satellite links

The International Standards Organization's (ISO's) seven-layer reference model for computer communication protocols is discussed. The layering arises out of the stratification of functions across the layers. The various protocol functions performed at each higher layer are examined in detail, identifying the appropriate procedures that affect the efficient operation of these protocols over satellite links for different ranges of transmission speeds and bit error rates. Appropriate modifications are presented for removing the possible degradation and improving the performance. Specifically, changes are discussed in Transport Protocol Class 4 (ISO 8073), Session Protocol (ISO 8327), and the File Transfer Access, and Management (FTAM) Protocol (ISO 8571).<
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