Method for reporting RX-TX time differences of UE and gNB in ​​non-terrestrial networks.

JP2026518505APending Publication Date: 2026-06-09SAMSUNG ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
SAMSUNG ELECTRONICS CO LTD
Filing Date
2024-05-13
Publication Date
2026-06-09

AI Technical Summary

Benefits of technology

【0010】 本発明によれば、NTN環境におけるUEの位置検証の信頼性を大幅に改善し、衛星の移動性を含むこのような環境によって生じる課題に対処することができる。また、本発明によれば、GNSSデータに依存することなく、重要なサービスに対する精度を向上させることにより、従来の方法を上回るUEの位置検証のための堅牢なフレームワークを提供することができる。更に、UEの位置検証は、ネットワーク上の複数の送受信ポイント(TRP)に依存することなく、1つの衛星によって達成することができる。

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Abstract

This provides a method for reporting the receive-transmit (Rx-Tx) time difference of a UE and the Rx-Tx time difference of a gNB in ​​a multi-round-trip time (multi-RTT) scheme applicable to NTN. [Solution] The present invention provides a method for reporting the time difference of user equipment (UE) in a non-terrestrial network (NTN), comprising the steps of: receiving a positioning reference signal (PRS) from a base station on the downlink (DL); determining the timestamp or subframe index of the PRS on the DL and the timestamp or subframe index of the subframe closest to the PRS on the uplink (UL) of the UE; determining the time difference of the UE from the reception of the PRS to the transmission of a sounding reference signal (SRS) based on the timestamp or subframe index; and reporting the SRS to the location management function (LMF) based on the time difference of the UE.
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Claims

1. A method for reporting the time difference of user equipment (UE) in a non-terrestrial network (NTN), The steps include receiving a positioning reference signal (PRS) via downlink (DL) from a base station, The steps include determining the timestamp or subframe index of the PRS in the DL, and the timestamp or subframe index of the subframe closest to the PRS in the uplink (UL) of the UE, A step of determining the time difference of the UE from the reception of the PRS to the transmission of the sounding reference signal (SRS) based on the timestamp or the subframe index, A method characterized by comprising the step of reporting the SRS to the location management function (LMF) based on the time difference of the UE.

2. The method according to claim 1, further comprising the step of verifying the position of the UE based on the time difference of the UE.

3. The method according to 2, characterized in that the location of the UE is verified for one or more services including a public warning system (PWS), communications interception (LI), emergency communications service (EMS), or billing and charge notification.

4. The method according to claim 1, further comprising the step of transmitting an aggregate value of the timing advance (TA) adjustments applied by the UE from the time before the reception of the PRS to the time of transmission of the SRS.

5. The method according to 4, characterized in that the aggregated value of the TA adjustments includes autonomous adjustments or adjustments triggered by a network.

6. The method according to claim 1, further comprising the step of transmitting an aggregate value of the timing advance (TA) adjustments applied by the UE from the time of receiving the PRS to the time of transmitting the SRS.

7. The method according to 6, further comprising the step of the base station reporting the base station reception-transmission (Rx-Tx) time difference to the LMF.

8. A method for reporting the time difference between base stations in a non-terrestrial network (NTN), The steps include transmitting a positioning reference signal (PRS) to the user equipment (UE) via downlink (DL), The steps include receiving the timestamp or subframe index of the PRS in the DL, and the timestamp or subframe index of the subframe closest to the PRS in the uplink (UL) of the UE, A step of determining the time difference between the transmission of the PRS and the reception of the sounding reference signal (SRS) at the base station based on the timestamp or the subframe index, A method characterized by comprising the step of reporting the SRS to the Local Movement Function (LMF) based on the time difference of the base station.

9. The method according to 8, further comprising the step of verifying the location of the UE based on the time difference of the base station.

10. The method according to 9, characterized in that the location of the UE is verified for one or more services including a public warning system (PWS), communications interception (LI), emergency communications service (EMS), or billing and charge notification.

11. The method according to 8, further comprising the step of receiving an aggregate value of the timing advance (TA) adjustments applied by the UE from a point in time before the reception of the PRS to the time of transmission of the SRS.

12. The method according to 11, characterized in that the aggregated value of the TA adjustments includes autonomous adjustments or adjustments triggered by a network.

13. The method according to 8, further comprising the step of receiving an aggregate value of the timing advance (TA) adjustments applied by the UE from the time of receiving the PRS to the time of transmitting the SRS.

14. The method according to 13, further comprising the step of the base station reporting the base station reception-transmission (Rx-Tx) time difference to the LMF.

15. A non-temporary computer-readable recording medium on which instructions are stored, When the aforementioned instruction is executed by the processor, the processor will: The base station receives the positioning reference signal (PRS) via downlink (DL). The DL determines the timestamp or subframe index of the PRS, and the UE's uplink (UL) determines the timestamp or subframe index of the subframe closest to the PRS. Based on the timestamp or subframe index, the time difference of the UE from the reception of the PRS to the transmission of the sounding reference signal (SRS) is determined. A non-temporary computer-readable recording medium characterized by causing the SRS to report to the location management function (LMF) based on the time difference of the UE.

16. When the aforementioned instruction is executed by the processor, the processor further: The position of the UE is verified based on the time difference of the aforementioned UE. The non-temporary computer-readable recording medium according to claim 15, wherein the location of the UE is verified for one or more services including a public warning system (PWS), communications interception (LI), emergency communications service (EMS), or billing and charge notification.

17. When the aforementioned instruction is executed by the processor, the processor further: The non-temporary computer-readable recording medium according to claim 15, characterized in that it transmits an aggregate value of the timing advance (TA) adjustment applied by the UE from the time before the reception of the PRS to the time of transmission of the SRS.

18. The non-temporary computer-readable recording medium according to claim 17, characterized in that the aggregated value of the TA adjustments includes autonomous adjustments or adjustments triggered by a network.

19. When the aforementioned instruction is executed by the processor, the processor further: The non-temporary computer-readable recording medium according to claim 15, characterized in that it transmits an aggregate value of the timing advance (TA) adjustment applied by the UE from the time of receiving the PRS to the time of transmitting the SRS.

20. When the aforementioned instruction is executed by the processor, the processor further: The non-temporary computer-readable recording medium according to claim 19, characterized in that the base station reports the base station reception-transmission (Rx-Tx) time difference to the LMF.