arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.07965cs.NI
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密集LEO星座中的面间星间连通性

Inter-Plane Inter-Satellite Connectivity in Dense LEO Constellations

Israel Leyva-Mayorga, Beatriz Soret, Petar Popovski

摘要:

随着私营公司和初创公司拥有的大量正在进行的部署,部署在低地球轨道(LEO)上的密集卫星星座将在不久的将来的无线通信中发挥重要作用。此外,第三代合作伙伴计划(3GPP)正在努力将卫星集成到5G和超5G网络中。然而,要充分利用卫星星座的连通能力,必须克服许多挑战。这些挑战主要是由于单个小型卫星的能力低,以及由于部署高度低而导致的轨道速度高和覆盖范围小。特别地,连接来自不同轨道平面的卫星的平面间卫星间链路(ISL)是非常动态的,并且可能受到多普勒频移的显著影响。本文提出了一种低轨星座平面间星间链路动态建立的框架和相应的算法。我们的研究结果表明,所提出的算法增加了高达115%的星座的速率总和1)相对于最先进的基准计划在无干扰的环境和2)高达71%相比,随机资源分配在最坏情况下的干扰。

英文摘要:

With numerous ongoing deployments owned by private companies and startups, dense satellite constellations deployed in low Earth orbit (LEO) will play a major role in the near future of wireless communications. In addition, the 3rd Generation Partnership Project (3GPP) has ongoing efforts to integrate satellites into 5G and beyond-5G networks. Nevertheless, numerous challenges must be overcome to fully exploit the connectivity capabilities of satellite constellations. These challenges are mainly a consequence of the low capabilities of individual small satellites, along with their high orbital speeds and small coverage due to the low altitude of deployment. In particular, inter-plane inter-satellite links (ISLs), which connect satellites from different orbital planes, are greatly dynamic and may be considerably affected by the Doppler shift. In this paper, we present a framework and the corresponding algorithms for the dynamic establishment of the inter-plane ISLs in LEO constellations. Our results show that the proposed algorithms increase the sum of rates in the constellation 1) by up to 115% with respect to the state-of-the-art benchmark schemes in an interference-free environment and 2) by up to 71% when compared to random resource allocation in a worst-case scenario for interference.

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