Generalized mechanism of SOTDMA and probability of reception for satellite-based AIS

Satellite based ‘Automatic Identification System’ (AIS) for global maritime applications is of current interest. The challenge of the system mainly lies in the detection capability of the receiver due to multiple transmissions from different ships received at the satellite simultaneously. To estimate the performance of the receiver proper modeling of the channel access scheme is important. In this paper we propose a generalized methodology of the Self Organized Time Division Multiple Access (SOTDMA) in an extended observation area for satellite based AIS. The performance of the proposed scheme is compared with an existing model and more realistic reception performance by a satellite based receiver is shown.