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arXiv 2501.04557cs.NI
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星地路由还是星间路由?随机几何视角

Satellite-Terrestrial Routing or Inter-Satellite Routing? A Stochastic Geometry Perspective

Ruibo Wang, Mustafa A. Kishk, Howard H. Yang, Mohamed-Slim Alouini

AI总结:

本文从随机几何视角研究低轨星座中STR与ISR的权衡,分别提出最优路由中继选择算法,并推导路由可用概率与能量效率表达式以量化和比较二者性能。

摘要:

低轨卫星星座中星地路由(STR)与星间路由(ISR)的设计和比较是一个被广泛讨论的话题。STR下的信号传播距离通常长于ISR下的传播距离,从而导致更大的路径损耗。网关的全球部署为STR带来了额外成本。相比之下,ISR下的传输依赖卫星的能量,这可能成本更高。此外,ISL需要更复杂的通信协议设计、额外的硬件支持以及更高的计算能力。为最大化能量效率,我们分别针对ISR和STR提出了两种最优路由中继选择算法。此外,我们推导了路由可用概率和能量效率的解析表达式,以量化算法性能。这些分析使我们能够通过数值结果评估所提算法相对于现有方法的性能,比较STR与ISR的性能,并为星座设计提供有用的洞见。

英文摘要:

The design and comparison of satellite-terrestrial routing (STR) and inter-satellite routing (ISR) in low Earth orbit satellite constellations is a widely discussed topic. The signal propagation distance under STR is generally longer than that under ISR, resulting in greater path loss. The global deployment of gateways introduces additional costs for STR. In contrast, transmissions under ISR rely on the energy of satellites, which could be more costly. Additionally, ISLs require more complex communication protocol design, extra hardware support, and increased computational power. To maximize energy efficiency, we propose two optimal routing relay selection algorithms for ISR and STR, respectively. Furthermore, we derive the analytical expressions for the routing availability probability and energy efficiency, quantifying the performance of the algorithms. The analyses enable us to assess the performance of the proposed algorithms against existing methods through numerical results, compare the performance of STR and ISR, and provide useful insights for constellation design.

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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