[论文解读] An Overview on Integrated Localization and Communication Towards 6G

Xiao Zhiqiang, Yong Zeng|arXiv (Cornell University)|Jun 2, 2020

Indoor and Outdoor Localization Technologies参考文献 233被引用 39

一句话总结

本论文提供了一个关于6G的整合定位与通信（ILAC）的教程性综述，详细介绍定位与通信在网络、架构及3D空地场景中的相互作用。

ABSTRACT

While the 5G cellular system is being deployed worldwide, researchers have started the investigation of the 6G mobile communication networks. Although the essential requirements and key usage scenarios of 6G are yet to be defined, it is believed that 6G should be able to provide intelligent and ubiquitous wireless connectivity with Tbps data rate and sub-millisecond latency over 3D network coverage. To achieve such goals, acquiring accurate location information of the mobile terminals is becoming extremely useful, not only for location-based services but also for improving wireless communication performance in various ways such as channel estimation, beam alignment, medium access control, routing, and network optimization. On the other hand, the advancement of communication technologies also brings new opportunities to greatly improve the localization performance, as exemplified by the anticipated centimeter-level localization accuracy in 6G by ultra massive MIMO and mmWave technologies. In this regard, a unified study on integrated localization and communication (ILAC) is necessary to unlock the full potential of wireless networks for the best utilization of network infrastructure and radio resources for dual purposes. While there are extensive literatures on wireless localization or communications separately, the research on ILAC is still in its infancy. Therefore, this article aims to give a tutorial overview on ILAC towards 6G wireless networks. After a holistic survey on wireless localization basics, we present the state-of-the-art results on how wireless localization and communication inter-play with each other in various network layers, together with the main architectures and techniques for localization and communication co-design in current 2D and future 3D networks with aerial-ground integration. Finally, we outline some promising future research directions for ILAC.

研究动机与目标

• 提供对无线定位基础知识与性能指标的全面介绍。
• 综述定位与通信在 ILAC 中跨网络层的协同工作。
• 讨论驱动厘米级精度的使能技术与5G定位建议。
• 提出2D与3D（空地）网络的ILAC架构，并概述挑战与未来方向。

提出的方法

• 综述无线定位基础知识，包括定义、分类和测量模型。
• 总结3GPP 5G定位建议与实现厘米级精度的使能技术。
• 考察定位辅助的通信，以及定位如何支持信道估计、波束对准、路由与网络优化。
• 提出当前2D和未来3D空地网络的ILAC架构与协同设计方法。
• 讨论ILAC以及自给自足网络（SSN）的使能技术、挑战与未来研究方向。

实验结果

研究问题

• RQ1 如何将定位与通信协同设计以提升6G网络的性能？
• RQ2 考虑3D空地一体化，哪些架构与技术能实现6G中的厘米级定位？
• RQ3 来自5G的使能技术支持ILAC，它们如何扩展到6G？
• RQ4 3D覆盖下ILAC和3CLS面临的挑战与未来方向有哪些？
• RQ5 在超密/毫米波网络中，ILAC如何促进定位感知的网络优化、波束管理与感知？

主要发现

• 本文提供了一个针对6G的ILAC的全面教程式概述，将定位与通信视角统一起来。
• 讨论了无线定位基础知识和网络架构如何交互以在2D与3D网络中实现ILAC。
• 作者概述使能技术（如毫米波、大规模MIMO、UDNs）是实现厘米级定位和改进ILAC性能的关键。
• 空地一体化与3D ILAC架构被提出为实现无处不在无线覆盖的关键方向。
• 文章强调3CLS和自给自足网络作为利用定位信息进行联合资源管理的有前景的范式。
• 未来研究方向和6G中ILAC的挑战点包括隐私、可靠性和集成复杂性。