| 摘 要： |
A key issue in the research and development of next-generation mobile communication systems (Beyond 5G/6G) is the availability of novel frequency bands. Currently, the frequency band below 6 GHz, which is suitable for mobile communications, is already tight, and technologies for highly efficient utilization of finite spectrum resources are required. Therefore, many researches have been conducted on the practical application of dynamic spectrum sharing technology for the effective use of spectrum. For this technology, it is important to precisely estimate the spectrum utilization of the wireless system and the propagation characteristics changes in each environment. Furthermore, in Beyond 5G/6G, non-terrestrial networks (NTNs) such as satellites and drones are expected to be utilized to expand the communication area, which will require spectrum management in the height direction. In this paper, we design and develop a 5-dimensional (5D) spectrum database that extends the spectrum database of radio environment information from the 2-dimensional (2D) plane of latitude and longitude to a 3-dimensional (3D) space that includes height information, as well as time domain and frequency domain. Additionally, we describe the design details for the mobile satellites in the NTNs incorporated into the database. Finally, test results from the measurement campaign and calculated data size in the developed database are discussed.
下一代移动通信系统（Beyond 5G/6G）研发中的一个关键问题是新型频段的可用性。目前，适用于移动通信的6 GHz以下频段已十分紧张，因此需要开发高效利用有限频谱资源的技术。为此，许多研究致力于动态频谱共享技术的实际应用，以实现频谱的有效利用。该技术的关键在于准确估算无线系统的频谱使用情况以及不同环境下的传播特性变化。此外，在Beyond 5G/6G时代，卫星和无人机等非地面网络（NTNs）有望被用于扩展通信覆盖范围，这将需要在垂直方向上进行频谱管理。本文设计并开发了一种五维（5D）频谱数据库，将无线电环境信息的频谱数据库从二维（2D）的经纬度平面扩展为三维（3D）空间，该空间包含高度信息以及时域和频域数据。此外，文中还介绍了集成于数据库中的移动卫星的设计细节。最后，讨论了测量活动的测试结果以及所建数据库中计算出的数据量。 |
京公网安备 11010202009788