HAP-Reserved Communications in Space-Air-Ground Integrated Networks

Terrestrial communication networks have experienced significant development in recent years by providing emerging services for ground users. However, one critical challenge raised is to provide full coverage (especially dense high-rise urban environments) users due scarce network resources and limited coverage. To meet this challenge, we propose a high altitude platform (HAP)-reserved ground-air-space (GAS) transmission scheme, which combines with the ground-to-space (G2S) scheme strengthen terrestrial save power. integrate two schemes, control strategy. Wherein, user decides its i.e., switches between GAS link G2S probability. We then maximize overall throughput derive optimal probability that adopts scheme. Numerical results demonstrate superiority of proposed