Abstract
In stratosphere cellular networks (SCNs) relying on control-and user-plane separation (CUPS), control base stations (CBSs) located on high altitude platforms (HAPs) form the control plane (CP) and provide control coverage for a large area on the ground. In contrast, traffic base stations (TBSs) on the ground forming the user plane (UP) are used for transmitting high-speed data under the blanket of the CP. To study the performance of SCN based on CUPS, especially CP’s coverage, we present an analytical model in this paper. Based on stochastic geometry, we derive the CP’s coverage probability under Rician fading, and UP’s energy efficiency (UP-EE) under Rayleigh fading. Moreover, the letter is dependent on the successful coverage of CP. Numerical results show that when the traffic load is high, the CP’s coverage probability increases with the increasing density of the CBSs. We also found that the maximal CP’s coverage probability can be achieved by optimizing the height of the CBSs while achieving a high UP-EE within CP’s coverage.
Published Version
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