Space-air-ground Integrated Networks For Urllc In Spatial Digital Twins

This work intends to improve ultra-reliable and low-latency communication (URLLC) service in space-air-ground integrated (SAGIN) and the network's quality of service. To this end, this work considers the queuing latency and transmission reliability of uplink and downlink networks. It also proposes an intelligent coordinated scheduling algorithm (ICSA) based on the adaptive Particle Swarm Optimization algorithm. The simulation experiment proves that ICSA achieves the optimal total priority and completion rate when scheduling different numbers of tasks. In addition, the time-slot Areal Locations of Hazardous Atmospheres protocol is applied to reduce URLLC's control-plane latency. With 100 or fewer tasks, the network resources can be scheduled with ease. Under the two transmission states, the Preamble Reservation Scheme is designed to provide timely URLLC services. As a result, the URLLC's random-access probability decreases as the number of URLLC requests increases. The results have vital significance for standardizing and promoting the URLLC service in the Sixth Generation Mobile Communication era.