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UE视野内通常只有一颗卫星，传统的多节点联合定位不再适用于NTN场景，创新地提出了单卫星Multi-RTT定位，不同时刻的LEO卫星具有不同的位置，UE测量来自同一颗卫星的下行链路信号在不同时间点的UE Rx-Tx时间差并报给LMF，服务gNB测量来自UE的上行链路信号在不同时间点的gNB RX-TX时间差并报告给LMF，由LMF进一步计算RTT，再结合不同时间点的卫星坐标，估计出UE的位置。最后分析了UE Rx-Tx时间差和gNB RX-TX时间差。
Abstract：There is usually only one satellite in the UE's view,so traditional multi-node joint positioning is no longer applicable to NTN scenarios. It innovatively puts forward Multi-RTT positioning principle with single satellite. LEO satellites have different positions at different times. UE measures and reports UE Rx-Tx time difference of the downlink signal from the same satellite at different time instants and reports it to the LMF. LMF further calculates the RTT,and then estimates the location of the UE by combining satellite coordinates at different time points. Finally,it analyzes UE Rx-Tx time difference and gNB RxTx time difference.
[1]3GPP. Study on new radio(NR)to support non-terrestrial networks:3GPP TR 38.811[S/OL].[2025-07-31]. ftp：//3gpp.org/specs/.
[2]3GPP. Discμssion on network verified UE location:R2-2207074[S/OL].[2025-07-31]. ftp：//3gpp.org/specs/.
[3]3GPP. Network verified UE location aspects:R2-2207098[S/OL].[2025-07-31]. ftp：//3gpp.org/specs/.
[4]3GPP. Discμssion on network verified UE location for NR NTN:R1-2300267[S/OL].[2025-07-31]. ftp：//3gpp.org/specs/.
[5]3GPP. Discμssion on network-verified UE location for NTN:R1-2211601[S/OL].[2025-07-31]. ftp：//3gpp.org/specs/.
[6]3GPP. NR;physical channels and modulation:3GPP TS 38.211[S/OL].[2025-07-31]. ftp：//3gpp.org/specs/.
[7]3GPP. NR;physical layer procedures for control:3GPP TS 38.213[S/OL].[2025-07-31]. ftp：//3gpp.org/specs/.
[8]3GPP. On network verified UE location in NR NTN:R2-2211373[S/OL].[2025-07-31]. ftp：//3gpp.org/specs/.
[9]3GPP. NR;requirements for support of radio resource management:3GPP TS 38.133[S/OL].[2025-07-31]. ftp：//3gpp.org/specs/.
[10]3GPP. Remaining issues on network verified UE location for NR NTN:R1-2311862[S/OL].[2025-07-31]. ftp：//3gpp.org/specs/.
[11]3GPP. NR；μser equipment(UE)radio transmission and reception:3GPP TS 38.101[S/OL].[2025-07-31]. ftp：//3gpp.org/specs/.
[12]3GPP. Further aspects related to network verified UE location:R1-2307246[S/OL].[2025-07-31]. ftp：//3gpp.org/specs/.
[13]叶向阳，单单，韩春娜，等. 5G NTN定时提前调整策略分析[J].邮电设计技术，2023(9):58-62.
[14]3GPP. Maintenance on network-verified UE location for NR-NTN:R1-2311521[S/OL].[2025-07-31]. ftp：//3gpp.org/specs/.
基本信息:
中图分类号:TN927.2
引用信息:
[1]张建国,王森,周励人,等.NR NTN网络验证UE位置策略分析[J].邮电设计技术,2025,No.598(12):1-5.
2025-12-20
2025-12-20