An Economic Model For International Satellite/Cable Planning

This paper presents the Global Satellite Model (GSM) and its applications. The model was developed at AT&T to estimate satellite usage and satellite costs. The model relies on engineering economics, time-series analysis, regression, feedback control theory, and principles of traffic engineering to determine a satellite circuit forecast and a corresponding tariff forecast. These forecasts are required for long-term facility planning and short-term facility selection in the international network. The model has also been instrumental in analyzing new digital satellite service offerings, in implementing a recent satellite usage agreement between AT&T and COMSAT, and in analyzing the impact of proposed deregulation scenarios for the international network.