PERFORMANCE OF PRMA IN A MOBILE RADIO CHANNEL

The performance of the packet reservation multiple access (PRMA) proto col in a real mobile radio channel that suffers from propagation impai rments including multipath fading, shadowing and distant-dependent pat h loss, is studied by simulation. Significant performance degradations , measured by the number of simultaneous conversations supportable in a cell subject to a packet dropping probability of 1%, are observed. A dditionally, receiver capture is also found to be ineffective in incre asing this supportable number of simultaneous conversations. A modifie d PRMA protocol is then introduced, and shown to be capable of improvi ng performance through minimizing premature loss of reservations and a voiding additional collisions that arise due to the channel errors.