Estimating optimum technical and economic indicators of data transmission systems

Selection of the technically and economically optimum design variant for planning or simulating a data transmission system necessitates determination of the optimum requirements for the various systems components. For solving this difficult problem, one must establish the pertinent relations between their parameters and how their cost depends on them. This is done by defining the appropriate criterion for cost effectiveness and constructing a mathematical model of the transmission channel. Subsequent calculations will yield the optimum variant accordingly, as is shown in the typical case of a Poisson distribution of the interference and exponential distributions of both the message lengths and the failure clearance time. It has been assumed in this illustrative example that the principle of noninterdependence applies to all nodal points of the system. Calculations cover the reasonable cost of ensuring reliability of the systems components.