LEO-based network-centric localization in 6G: Challenges and future perspectives

IF 4.4 2区计算机科学 Q1 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Computer Networks Pub Date : 2024-08-03 DOI:10.1016/j.comnet.2024.110689

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Abstract

The future releases of 3rd Generation Partnership Project (3GPP) specifications, that is, beyond release 18, will consider the possibility to localize the User Equipment (UE) at network-side, eventually using satellite constellations of the integrated Terrestrial-Non-Terrestrial networks (T-NTN). Satellite network-centric localization schemes can be categorized into single- and multi-satellite localization using spatio-temporal measurements or instantaneous spatial diversity, respectively Direct channel measurements such as Doppler, Received Signal Strength (RSS), Round Trip Time (RTT) and Angle-of-Arrival (AoA) or differential measurements such as Time-Difference-of-Arrival (TDoA) and Frequency-Difference-of-Arrival (FDoA) have been considered in the literature to aid the localization operation. This paper focuses on the applicability of an RTT approach, which has some advantages with respect to the other approaches in case of satellite network-centric localization in the integrated T-NTN. The paper shows some preliminary results of the proposed RTT approach. Finally, challenges and research trends of this novel research field have been highlighted.

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6G 中基于低地轨道的网络中心定位：挑战与未来展望

第三代合作伙伴计划（3GPP）规范的未来版本，即第 18 版以后的版本，将考虑在网络侧定位用户设备（UE）的可能性，最终使用地面-非地面集成网络（T-NTN）的卫星星座。以卫星网络为中心的定位方案可分为单卫星定位和多卫星定位，分别使用时空测量或瞬时空间分集直接信道测量，如多普勒、接收信号强度（RSS）、往返时间（RTT）和到达角（AoA），或差分测量，如到达时间差（TDoA）和到达频率差（FDoA），在文献中已被考虑用于辅助定位操作。本文重点讨论 RTT 方法的适用性，该方法与其他方法相比，在集成 T-NTN 中以卫星网络为中心的定位中具有一些优势。本文展示了所提议的 RTT 方法的一些初步结果。最后，还强调了这一新型研究领域所面临的挑战和研究趋势。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Computer Networks 工程技术-电信学

CiteScore

10.80

自引率

3.60%

发文量

434

审稿时长

8.6 months

期刊介绍： Computer Networks is an international, archival journal providing a publication vehicle for complete coverage of all topics of interest to those involved in the computer communications networking area. The audience includes researchers, managers and operators of networks as well as designers and implementors. The Editorial Board will consider any material for publication that is of interest to those groups.