A modified PRMA protocol for voice and data transmissions in low earth orbit mobile satellite systems

Future mobile communication systems will provide multimedia services to use rs in every environment through uniform access procedures, In this scenario , it is essential to define efficient medium access control (MAC) protocols that are suitable for both terrestrial and satellite systems (integrated n etworks). This paper envisages packet reservation multiple access (PRMA) fo r supporting voice and data transmissions in low earth orbit (LEO) mobile s atellite systems. In particular, a modified PRMA (MPRMA) protocol is propos ed and analyzed, Simulation results are also presented in order to validate the analytical approach. A parameter optimization has been carried out to improve the protocol performance. Finally, a comparison with PRMA has permi tted to highlight the advantages of the new MPRMA scheme.