Low-Latency Space-Air-Ground Integrated Access Control and Service Bearing Considering Spatial-Domain Coverage Hole

With the increasing frequency of extreme weather and natural disasters, traditional ground communication networks struggle to meet emergency demands due to inadequate coverage and slow recovery. Complex terrain and inefficient resource allocation also lead to spatial-domain coverage holes, impacting fault location accuracy and emergency repair efficiency. To address these issues, a low-latency service bearing architecture for space-air-ground integrated networks is constructed, which accounts for spatial-domain coverage holes. Secondly, a low-latency service bearing and access control method for space-air-ground integrated networks is proposed considering spatial-domain coverage holes. Furthermore, a low-latency unmanned aerial vehicle (UAV) relay dispatch and channel joint selection algorithm based on coverage hole-aware Q-matching is proposed. Simulation results demonstrate that the proposed method significantly mitigates spatial-domain coverage holes and reduces average queuing delay for critical service bearing.