ATM cell/IP packet transmission characteristics evaluation in multimedia interactive satellite communication system

Asymmetric bidirectional satellite communication systems (multimedia satell ite communication systems) with the capability of economical and high-speed multimedia access using terrestrial stations in the uplink and satellite c ircuits in the downlinks are proposed and an experimental prototype is fabr icated. In this system, ATM cell/IP packets are transmitted in the satellit e circuits and performance is evaluated in terms of the error characteristi cs of the ATM layer/IP layer, which play an important role in system design . In this respect, a simple error model is used to represent the satellite circuit part of the multimedia communication system and the actually measur ed results and their corresponding evaluation are also presented. By determ ination of proper parameters and their values, good agreement is seen betwe en the calculated results based on the presented model and the measured one s. At a cell loss rate of 10(-7), the required E-b/N-0 of the system is abo ut 4.7 dB. Further, the system margin is shown to be about 7 dB in achievin g such EbN0 ratios, which indicates that the system possesses sufficient re alization capability. (C) 2001 Scripta Technica.