Institute for Telecommunication Sciences
the research laboratory of the National Telecommunications and Information Administration

Martin Nesenbergs

Abstract: Motivated by recognized vulnerabilities of the terrestrial public networks, this report addresses the question whether an appropriate introduction of advanced satellite systems would or would not benefit the telecommunication services for the currently existing terrestrial infrastructure. What the satellite subnetwork should be, and what performance gains are to be realized, are two key issues. Given voice, data or integrated services traffic, the survivability and restoral effectiveness of different network configurations is likely to vary considerably for different crisis scenarios. It is concluded that answers to these and other complex, performance–related, questions can only be gotten by means of computer modeling and simulation. Today there seem to be sufficient simulation tools available for the task. The report reviews the overall plan and simulation objectives for circuit–switched networks. From the many proposed methodologies, the discrete event and temporal aggregation methods are emphasized. The importance of simulator inputs is demonstrated through needs for relatively detailed specifications of the terrestrial and satellite networks, their interfaces, the offered traffic, stress (i.e., network damage and traffic overload), and service performance measures required in the simulation output.

Keywords: simulation; performance; modeling; traffic; advanced satellites; blocking grade-of-service; circuit-switched networks; network damage; satellite-terrestrial hybrid; service restoral; stress; temporal aggregation

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Lilli Segre, Publications Officer
Institute for Telecommunication Sciences
(303) 497-3572

Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

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