An Efficient Handover Scheme for Multimedia Application Using LEO/MEO Double-layer Satellite Network

For a single low Earth orbit (LEO) satellite has limited capacity, the blocking probability of guaranteed handover (GH) algorithm increases rapidly in the case of high traffic load. So, when large amounts of multimedia services are transmitted via a single low Earth orbit (LEO) satellite system, the PB of it is much higher. In order to solve this problem, a modified handover scheme defined by multi-tier optimal layer selection is proposed. The scheme sufficiently takes into account the characteristics of the low/medium Earth orbit (LEO/MEO) double-layer satellite network and the multimedia transmitted by such network, so it can effectively reduce the traffic load in the LEO which perform GH algorithm. The simulation results show that this approach integrated with GH algorithm used in LEO/MEO satellite network achieves a significant improvement in the QoS performance and practicability of the algorithm as compared to the single LEO layer network. Also, the complexity of this algorithm was analyzed based on some numerical results