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arXiv 2408.05070cs.ITeess.SPmath.IT
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异构 LEO 卫星网络中下行通信的建模与分析

Modeling and Analysis of Downlink Communications in a Heterogeneous LEO Satellite Network

Chang-Sik Choi

AI总结:

本文用 Cox 点过程建模多运营商共享频谱的异构 LEO 卫星网络,分析封闭与开放接入的下行覆盖概率,证明开放接入可使所有用户获益。

摘要:

低地球轨道(LEO)卫星网络连接地球上数以百万计的设备,并提供多种服务,例如数据通信、遥感和数据采集。随着服务数量增加,LEO 卫星网络将持续增长,并且许多 LEO 卫星网络运营商将共享相同的频谱资源。我们旨在通过提出一个易于处理的空间模型并分析下行通信的基本性能,来考察这种未来异构 LEO 卫星网络的共存问题。我们将异构 LEO 卫星网络建模为 Cox 点过程,确保卫星位于各种轨道上。随后,我们分析此类异构卫星网络的两种不同接入技术:封闭接入和开放接入。对于这两种情形,我们推导了覆盖概率,并证明开放接入场景的覆盖概率优于封闭接入,而且这种覆盖增强适用于所有用户。通过提供作为关键分布参数的基本网络性能统计量,并展示 Cox 点过程能够以很小偏差逼近即将到来的未来星座这一事实,所开发的框架和分析将成为一种易于处理的工具,用于设计、评估和优化包含众多星座的异构 LEO 卫星网络。

英文摘要:

Low Earth Orbit (LEO) satellite networks connect millions of devices on Earth and offer various services, such as data communications, remote sensing, and data harvesting. As the number of services increases, LEO satellite networks will continue to grow, and many LEO satellite network operators will share the same spectrum resources. We aim to examine the coexistence of such a future heterogeneous LEO satellite network by proposing a tractable spatial model and analyzing the basic performance of downlink communications. We model a heterogeneous LEO satellite network as Cox point processes, ensuring satellites are located on various orbits. Then, we analyze two different access technologies for such a heterogeneous satellite network: closed access and open access. For both cases, we derive the coverage probability and prove that the coverage probability of the open access scenario outperforms that of the closed access, and this coverage enhancement applies to all users. By providing essential network performance statistics as key distributional parameters and by presenting the fact that the Cox point process approximates a forthcoming future constellation with slight variation, the developed framework and analysis will serve as a tractable instrument to design, evaluate, and optimize heterogeneous LEO satellite networks with numerous constellations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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