Cross-domain power pooling resource scheduling for space-air-ground integrated networks
TL;DR
A virtual-resource-block-based cross-domain power pooling framework, in which satellite, HAPS, and terrestrial transmit powers are abstracted and allocated from a unified global pool, using a priority-based rounding heuristic combined with global water-filling.
Abstract
In space-air-ground integrated networks (SAGINs), limited high altitude platform station (HAPS) power can leave allocated spectrum underused under independent-domain scheduling. This paper proposes a virtual-resource-block-based cross-domain power pooling framework, in which satellite, HAPS, and terrestrial transmit powers are abstracted and allocated from a unified global pool. A priority-based rounding heuristic is combined with global water-filling, and Monte Carlo simulations use log-normal shadow fading with Rayleigh fading for terrestrial links, Rician fading for HAPS links, and no small-scale fading for satellite links. The proposed scheme achieves an average per-user throughput of 56.28 Mbps, with a 95% confidence interval of ±0.19 Mbps for the mean and an approximate 95% run-to-run spread of ±2.69 Mbps, improving independent-domain scheduling by 56%, reducing outage probability from 54.0% to 5.0%, and increasing the average per-run minimum user rate to 7.58 Mbps. Paired t-tests verify that throughput improvements over all baselines are statistically significant with p < 0.001.