ABSTRACT
An updated dynamic channel reservation scheme based on priorities, which works for different classes of service in the Low Earth Orbit (LEO) satellite system, is proposed in this paper. With the deterministic and predictable LEO satellite motion, user location is not necessary. To obtain the overall system’s optimal quality of service, the proposed scheme redefines the thresholds distribution for reserved channels and the method for solving the dynamic thresholds. Then, the analytical approach is described including the LEO satellite mobility model, the channel allocation model based on Markov chain and the solution of the thresholds with the method of genetic-particle swarm optimisation hybrid algorithm. It has been proved by simulation results that the proposed scheme has the capability of offering more accuracy and flexibility for the dynamic channel reservation of different classes of service as well as effectively reducing handover failures. Moreover, the quality of service for the overall system has been improved.
