A mobile communication system providing integrated voice/data services over power limited satellite channels

The modeling and analysis of a system providing integrated voice/data services to mobile terminals over a power-limited satellite channels are discussed. The mobiles use slotted ALOHA random access to send requests for channel assignments to a central station. For successful requests, the actual transmission of voice/data within a call is done using the channel assigned for this purpose by the central station. The satellite channel is assumed to be power limited. Taking into account the known burstiness of voice sources (which use a voice-activated switch), the central station overassigns channels so that the average total power is below the power limit of the satellite transponder. The performance of this model is analyzed. Certain simple, static control strategies for improving performance are also proposed