In the 3GPP R16 standard and subsequent versions, the positioning capabilities of 5G have gradually improved, and location-based services have received further attention. 5G has designed a dedicated Positioning Reference Signal (PRS) for downlink positioning and improved the uplink Sounding Reference Signal (SRS) to enable positioning functionality. In 3GPP R18, Carrier Phase Positioning for 5G OFDM system was identified as a major research direction, which, in theory, can improve positioning accuracy to centimeter level.
For future application scenarios, what new signal systems are proposed in 6G research for low delay, high dynamic and other requirements? Based on the proposed 6G technology, what location-related research are worth studying?
The 6G communication network aims to integrate terrestrial, aerial, and maritime communications into a robust network. Although still in its early stages, the research community actively explores new and exciting possibilities. One focus application is leveraging AI and ML for intelligent network management and optimization. It is also worth to explore Quantum Communication and Quantum Machine Learning techniques to enhance communication capabilities. Additionally, Blockchain technology plays a crucial role in improving security, privacy, and trust within 6G networks. Another key research area could be enabling high-frequency, high-bandwidth communication using Terahertz and Millimeter Waves. In the context of 6G, location-based services and applications are also crucial. Research areas related to location-based services include precise positioning, privacy mechanisms, context-aware networking, environmental monitoring, and geospatial data fusion. These are some of the research areas worth exploring in the future.
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