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EP-4740329-A1 - POSITIONING IN NON-TERRESTRIAL NETWORKS

EP4740329A1EP 4740329 A1EP4740329 A1EP 4740329A1EP-4740329-A1

Abstract

A method can include starting, by a wireless device, a measurement period for measuring user equipment (UE) reception-transmission (Rx-Tx) time difference measurements. The method can also include, in response to a satellite switch without changing a physical cell identifier (PCI) of a cell during the measurement period, restarting the UE Rx-Tx time difference measurement.

Inventors

  • KHOSHKHOLGH DASHTAKI, MOHAMMAD GHADIR
  • CIRIK, Ali Cagatay
  • Dinan, Esmael Hejazi
  • ZHOU, HUA
  • PRASAD, Gautham

Assignees

  • Ofinno, LLC

Dates

Publication Date
20260513
Application Date
20240712

Claims (20)

  1. 1. A method comprising: starting, by a wireless device, a measurement period for measuring user equipment (UE) receptiontransmission (Rx-Tx) time difference measurements; and in response to a satellite switch without changing a physical cell identifier (PCI) of a cell during the measurement period, restarting the UE Rx-Tx time difference measurement.
  2. 2. The method of claim 1 , wherein the restarting the UE Rx-Tx time difference measurements comprises restarting the measurement period.
  3. 3. The method of claim 1 or claim 2, wherein the satellite switch without changing the PCI of the cell does not comprise a handover, wherein the handover comprises a reconfiguration with synchronization procedure.
  4. 4. The method of claim 3, wherein the handover is based on a radio resource control (RRC) reconfiguration message comprising a reconfiguration with synchronization configuration.
  5. 5. The method of claim 4, wherein the RRC reconfiguration message indicates a second cell different than the cell.
  6. 6. The method of any one of claims 1 to 5, wherein PCI of the cell does not change in response to the satellite switch.
  7. 7. The method of any one of claims 1 to 6, further comprising determining a handover not occurring during the measurement period.
  8. 8. The method of any one of claims 1 to 7, further comprising: receiving a sounding reference signal (SRS) configuration for the measuring the UE Rx-Tx time difference measurements; and determining the SRS is not reconfigured without a serving cell change during the measurement period, wherein the cell is the serving cell.
  9. 9. The method of any one of claims 1 to 8, further comprising determining no timing advance (TA) command corresponding to the cell during the measurement period being received.
  10. 10. The method of any one of claims 1 to 9, further comprising determining an uplink transmission timing of the wireless device changes during the measurement period.
  11. 11. The method of claim 10, wherein the determining the uplink transmission timing of the wireless device changes during the measurement period is in response to the satellite switch without changing the PCI of the cell.
  12. 12. The method of claim 10 or claim 11, wherein the determining the uplink transmission timing of the wireless device changes during the measurement period is not in response to a timing advance (TA) command.
  13. 13. The method of any one of claims 1 to 12, further comprising: receiving, from a location server, a message indicating a request for location information of the wireless device; and starting, based on the message, the measurement period.
  14. 14. The method of claim 13, wherein the request location information message is a long-term evolution (LTE)-based positioning protocol (LPP) message.
  15. 15. The method of any one of claims 1 to 14, further comprising receiving: a sounding reference signal (SRS) configuration comprising at least one SRS resource for measuring the UE Rx-Tx time difference measurements; and a downlink positioning reference signal ( DL PRS) configuration comprising at least one DL PRS resource for measuring the UE Rx-Tx time difference measurements.
  16. 16. The method of claim 15, wherein the UE Rx-Tx time difference measurements is based on a first time difference between: receiving a DL PRS resource of the at least one DL PRS resource; and transmitting an SRS resource of the at least one SRS resource.
  17. 17. The method of claim 16, wherein the receiving the DL PRS resource and the transmitting the SRS resource are prior to the satellite switch during the measurement period.
  18. 18. The method of claim 16 or claim 17, wherein the first time difference is measured before the restarting the UE Rx- Tx time difference measurements.
  19. 19. The method of claim 18, wherein the UE Rx-Tx time difference measurements is based on a second time difference between: receiving a DL PRS resource of the at least one DL PRS resource; and transmitting an SRS resource of the at least one SRS resource.
  20. 20. The method of claim 19, wherein the receiving the DL PRS resource and the transmitting the SRS resource are after the satellite switch during the measurement period.

Description

Positioning in Non-terrestrial Networks CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of U.S. Provisional Application No. 63/526,423, filed July 12, 2023, which is hereby incorporated by reference in its entirety. BRIEF DESCRIPTION OF THE DRAWINGS [0001] Examples of several of the various embodiments of the present disclosure are described herein with reference to the drawings. [0002] FIG. 1A and FIG. 1B illustrate example mobile communication networks in which embodiments of the present disclosure may be implemented. [0003] FIG. 2A and FIG. 2B respectively illustrate a New Radio (NR) user plane and control plane protocol stack. [0004] FIG. 3 illustrates an example of services provided between protocol layers of the NR user plane protocol stack of FIG. 2A. [0005] FIG. 4A illustrates an example downlink data flow through the NR user plane protocol stack of FIG. 2A. [0006] FIG. 4B illustrates an example format of a MAC subheader in a MAC PDU. [0007] FIG. 5A and FIG. 5B respectively illustrate a mapping between logical channels, transport channels, and physical channels for the downlink and uplink. [0008] FIG. 6 is an example diagram showing RRC state transitions of a UE. [0009] FIG. 7 illustrates an example configuration of an NR frame into which OFDM symbols are grouped. [0010] FIG. 8 illustrates an example configuration of a slot in the time and frequency domain for an NR carrier. [0011] FIG. 9 illustrates an example of bandwidth adaptation using three configured BWPs for an NR carrier. [0012] FIG. 10A illustrates three carrier aggregation configurations with two component carriers. [0013] FIG. 10B illustrates an example of how aggregated cells may be configured into one or more PUCCH groups. [0014] FIG. 11A illustrates an example of an SS/PBCH block structure and location. [0015] FIG. 11 B illustrates an example of CSI-RSs that are mapped in the time and frequency domains. [0016] FIG. 12A and FIG. 12B respectively illustrate examples of three downlink and uplink beam management procedures. [0017] FIG. 13A, FIG. 13B, and FIG. 13C respectively illustrate a four-step contention-based random access procedure, a two-step contention-free random access procedure, and another two-step random access procedure. [0018] FIG. 14A illustrates an example of CORESET configurations for a bandwidth part. [0019] FIG. 14B illustrates an example of a CCE-to-REG mapping for DCI transmission on a CORESET and PDCCH processing. [0020] FIG. 15 illustrates an example of a wireless device in communication with a base station. [0021] FIG. 16A, FIG. 16B, FIG. 16C, and FIG. 16D illustrate example structures for uplink and downlink transmission. [0022] FIG. 17A illustrates an example of positioning as per an aspect of an embodiment of the present disclosure. [0023] FIG. 17B shows an example of LPP messages and LPP procedures as per an aspect of an embodiment of the present disclosure. [0024] FIG. 18A shows an example of request capabilities message. [0025] FIG. 18B shows an example of provide capabilities message. [0026] FIG. 18C shows an example of request assistance data message. [0027] FIG. 19 shows an example of configuration parameters of a request location information. [0028] FIG. 20A shows an example of configuration parameters of a provided assistance data message. [0029] FIG. 20B shows an example of configuration parameters of a request assistance data message. [0030] FIG. 21A shows an example of configuration parameters of downlink (DL) positioning reference signal (PRS). [0031] FIG. 21 B shows an example of configuration parameters of downlink (DL) positioning reference signal (PRS). [0032] FIG. 22 shows an example of configuration parameters of downlink (DL) positioning reference signal (PRS). [0033] FIG. 23A shows an example of configuration of DL PRS resource set with respect to a DL frame (corresponding to a TRP) of the wireless device. [0034] FIG. 23B shows an example of configurations of DL PRS resource sets corresponding to TRPs. [0035] FIG. 24A shows an example of a search window for receiving PRS from a neighbor TRP. [0036] FIG. 24B shows an example of signaling access between the LMF and a base station based on NRPPa protocol. [0037] FIG. 25 and FIG. 26 show examples of NRPPa messages and corresponding NRPPa elementary procedures. [0038] FIG. 27 shows an example of NRPPa functions. [0039] FIG. 28 shows an example of implementation of a non-terrestrial network (NTN). [0040] FIG. 29A shows an example of an NTN. [0041] FIG. 29B shows an example of (NTN) assistance information for maintenance of UL synchronization at a wireless device in an NTN. [0042] FIG. 30 shows an example of positioning procedure in a non-terrestrial network. [0043] FIG. 31 shows an example of UL/DL communications during a positioning procedure in a non-terrestrial network as per an aspect of the present disclosure. [0044] FIG. 32 shows an example of UL/DL communications during a positioning procedure in a non-