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arXiv 2005.13122eess.SPcs.SYeess.SY
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空中网络中的多址接入:从正交和非正交到速率分裂

Multiple Access in Aerial Networks: From Orthogonal and Non-Orthogonal to Rate-Splitting

Wael Jaafar, Shimaa Naser, Sami Muhaidat, Paschalis C. Sofotasios, Halim Yanikomeroglu

摘要:

近年来,人们对无人驾驶飞行器(UAV)的利用产生了兴趣。具体而言,UAV可以在蜂窝网络中用作空中用户,用于递送、监视、救援搜索,或者用作空中基站(aBS),用于与偏远未覆盖区域或需要快速高容量的密集环境中的地面用户进行通信。为了满足无线空中网络的高要求,人们研究了几种多址接入技术。特别地,空分多址接入(SDMA)和功率域非正交多址接入(NOMA)为空中下行链路和上行链路呈现有希望的复用增益。然而,这些收益是有限的,因为它们取决于环境条件。因此,最近已经提出了一种通用的方案,称为速率分裂多址接入(RSMA),与SDMA和NOMA相比,其能够实现更好的频谱效率增益。在本文中,我们提出了一个全面的调查关键多址接入技术采用的空中网络,其中aBS部署服务于地面用户。由于只有零星的结果报告在空中系统中使用RSMA,我们的目标是通过建模和分析的加权和速率性能的两个用户的下行链路网络服务的基于RSMA的aBS扩展对这一主题的讨论。最后,提出了相关的开放性问题和未来的研究方向。

英文摘要:

Recently, interest on the utilization of unmanned aerial vehicles (UAVs) has aroused. Specifically, UAVs can be used in cellular networks as aerial users for delivery, surveillance, rescue search, or as an aerial base station (aBS) for communication with ground users in remote uncovered areas or in dense environments requiring prompt high capacity. Aiming to satisfy the high requirements of wireless aerial networks, several multiple access techniques have been investigated. In particular, space-division multiple access(SDMA) and power-domain non-orthogonal multiple access (NOMA) present promising multiplexing gains for aerial downlink and uplink. Nevertheless, these gains are limited as they depend on the conditions of the environment. Hence, a generalized scheme has been recently proposed, called rate-splitting multiple access (RSMA), which is capable of achieving better spectral efficiency gains compared to SDMA and NOMA. In this paper, we present a comprehensive survey of key multiple access technologies adopted for aerial networks, where aBSs are deployed to serve ground users. Since there have been only sporadic results reported on the use of RSMA in aerial systems, we aim to extend the discussion on this topic by modelling and analyzing the weighted sum-rate performance of a two-user downlink network served by an RSMA-based aBS. Finally, related open issues and future research directions are exposed.

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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