Channel adaptive diversity handover with multiple queueing models for LEO equatorial satellites

The development of satellite communication constellation in various countries has developed rapidly over the past decade. The satellite constellation in LEO orbit is chosen because of several advantages such as low power consumption, lower delay time, simple ground station, and high spectrum efficiency. Behind all the advantages in Low Earth Orbit, the main problem in LEO constellation is the mobility. Because of that, a handover is applied in LEO Constellation. The variation of satellite handover is Hard Handover, CASD Handover, or DDBHP handover. In this paper, the CASD model is used because it only uses one orbital plane and this model suppresses blocked and dropped calls. The modification is done by varying the queue model in this scheme, and which queuing model gives the best results. The best results of the research are in the FIFO model were carried out using the dual diversity scheme are 0.94% for blocked calls, 5.86% for dropped calls, and 93.2% for successful calls, and a total delay of 2.04 second of total simulation time for 30 seconds, caused incoming calls will be served sequentially so that no calls are served randomly and have more priority than other calls.