1、Bell Labs Consulting PRS for positioning,navigation and timing(PNT)services White paper Positioning,navigation and timing(PNT)is used for a wide range of services including emergency services,critical infrastructure,defence,and commercial applications such as autonomous systems and agriculture.While
2、 GPS has often been employed to support PNT services,there are several challenges including weak signals,vulnerability to jamming,and limitations in precision.The 3rd Generation Partnership Project(3GPP)has standardized a new signal,the Positioning Reference Signal(PRS),to enable higher availability
3、 and precision.In this white paper,we introduce PRS,describe the 3GPP-defined architectural enhancements for PNT,explore different positioning techniques that use PRS,and outline the key use cases that benefit from PRS.Bell Labs Consulting 2 White paper PRS for positioning,navigation and timing(PNT)
4、services Contents Executive summary 3 Introduction to 3GPP positioning and the PRS 4 3GPP architectural enhancements to support PNT services 7 Advantages of using PRS for 5G-NR positioning 9 Techniques for 3GPP-based positioning using PRS 11 DL-TDoA-based positioning 11 Information sent from LMF to
5、UE for DL-TDoA 12 Information sent from UE to LMF for DL-TDoA 13 Computing UE position using DL-TDoA,an example 15 DL-AoD-based positioning 16 Computing UE position using DL-AoD,an example 16 Carrier Phase Positioning(CPP)17 5G-NR parameters that influence positioning using PRS 18 Key use cases that
6、 benefit from PRS-based positioning 19 Conclusion 21 Abbreviations 22 References 23 Bell Labs Consulting 3 White paper PRS for positioning,navigation and timing(PNT)services Executive summary Positioning,navigation and timing(PNT)services using the Positioning Reference Signal(PRS)in the downlink ar
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