Impact of Objective Function on Spectral Efficiency in Integrated HAPS-Terrestrial Networks
CoRR(2024)
摘要
Integrating non-terrestrial networks (NTNs), in particular high altitude
platform stations (HAPS), with terrestrial networks, referred to as vHetNets,
emerges as a promising future wireless network architecture for providing
ubiquitous connectivity. In this context, optimizing the performance of
vHetNets has become a paramount concern, particularly in harmonized spectrum
vHetNets, where HAPS and terrestrial networks share the same frequency band,
resulting in severe inter-/intra-tier interference. This paper provides a
comparative analysis of different objective functions, specifically focusing on
weighted sum rate (WSR), network-wide proportional fairness (NW-PF), and
network-wide max-min fairness (NW-MMF), with an aim to design a joint user
association scheme and multiple-input multiple-output (MIMO) beamforming
weights in a vHetNet, operating in an urban area. The simulation results
comprehensively compare the behavior of different objective functions in
vHetNets and standalone terrestrial networks. This analysis aims to shed light
on the impact of diverse objective functions on the achievable spectral
efficiency (SE) of vHetNets.
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