The rapidly evolving communication landscape, with the advent of 6G technology, brings new challenges to the design and operation of wireless networks. One of the key concerns is the energy efficiency of the Radio Access Network (RAN), as the exponential growth in wireless traffic demands increasingly higher energy consumption. In this paper, we assess the potential of integrating a High Altitude Platform Station (HAPS) to improve the energy efficiency of a RAN, and quantify the potential energy conservation through meticulously designed simulations. We propose a quantitative framework based on real traffic patterns to estimate the energy consumption of the HAPS integrated RAN and compare it with the conventional terrestrial RAN. Our simulation results elucidate that HAPS can significantly reduce energy consumption by up to almost 30\% by exploiting the unique advantages of HAPS, such as its self-sustainability, high altitude, and wide coverage. We further analyze the impact of different system parameters on performance, and provide insights for the design and optimization of future 6G networks. Our work sheds light on the potential of HAPS integrated RAN to mitigate the energy challenges in the 6G era, and contributes to the sustainable development of wireless communications.

翻译：随着6G技术的到来，快速演进的通信格局给无线网络的设计与运营带来了新的挑战。其中关键问题之一是无线接入网（RAN）的能效，因为无线流量的指数级增长对能耗提出了越来越高的需求。本文评估了集成高空平台站（HAPS）以提升无线接入网能效的潜力，并通过精心设计的仿真量化了潜在的节能效果。我们提出一个基于真实流量模式的量化框架，用于估算集成HAPS的RAN能耗，并将其与传统地面RAN进行比较。仿真结果表明，HAPS利用其自维持性、高空覆盖及广域覆盖等独特优势，可显著降低能耗，节能幅度最高可达近30%。我们进一步分析了不同系统参数对性能的影响，并为未来6G网络的设计与优化提供了见解。本研究揭示了集成HAPS的RAN在缓解6G时代能源挑战方面的潜力，有助于推动无线通信的可持续发展。