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US-20260129609-A1 - SCHEMES ON GNSS POSITION FIX IN CONNECTED IN IOT NTN

US20260129609A1US 20260129609 A1US20260129609 A1US 20260129609A1US-20260129609-A1

Abstract

Apparatus and methods are provided for GNSS position fix in RRC connected state. In one novel aspect, the UE detects one or more global navigation satellite system (GNSS) measurement triggering conditions in an RRC_CONNECTED state; receives a network scheduled duration for GNSS measurement from a network entity, wherein the network scheduled duration for GNSS measurement is indicated by one or more parameters and being at least one of a scheduling gap and a GNSS timer; and performs a GNSS position fix acquisition procedure in the network scheduled duration for GNSS measurement in the RRC_CONNECTED state, and leaves the RRC_CONNECTED upon GNSS measurement is failed.

Inventors

  • Wen Tang
  • Gilles Charbit
  • Yao-Hua Cai
  • Xu Huang
  • Xuan Wang
  • Ye Huang
  • Xuancheng ZHU

Assignees

  • MEDIATEK SINGAPORE PTE. LTD.

Dates

Publication Date
20260507
Application Date
20251218
Priority Date
20230602

Claims (20)

  1. 1 . A method, comprising: detecting, by a user equipment (UE), one or more global navigation satellite system (GNSS) measurement triggering conditions in an RRC_CONNECTED state; receiving, a network scheduled duration for GNSS measurement from a network entity, wherein the network scheduled duration for GNSS measurement is indicated by one or more parameters and being at least one of a scheduling gap and a GNSS timer; and performing a GNSS position fix acquisition procedure in the network scheduled duration for GNSS measurement in the RRC_CONNECTED state, and leaving the RRC_CONNECTED upon GNSS measurement is failed.
  2. 2 . The method of claim 1 , further comprising: reporting a GNSS validity duration, and/or a remaining GNSS validity duration via Media Access Control (MAC) Control Element (CE) in the RRC_CONNECTED, after acquiring a GNSS position fix in the network scheduled duration for GNSS measurement.
  3. 3 . The method of claim 1 , wherein the one or more GNSS measurement triggering conditions include a GNSS position out-of-date condition in the RRC_CONNECTED state.
  4. 4 . The method of claim 1 , further comprising: reporting GNSS assistance information to the network entity, wherein the GNSS assistance information includes a GNSS position fix time duration for measurement.
  5. 5 . The method of claim 4 , wherein the GNSS assistance information further comprises a first GNSS validity duration or a first remaining GNSS validity duration, and wherein the first GNSS validity duration or the first remaining GNSS validity duration is one value from {10 s, 20 s, 30 s, 40 s, 50 s, 60 s, 5 min, 10 min, 15 min, 20 min, 25 min, 30 min, 60 min, 90 min, 120 min, infinity}.
  6. 6 . The method of claim 1 , wherein the network scheduled duration for GNSS measurement is configured for the UE to re-acquire GNSS position fix in the RRC_CONNECTED state and is based on the GNSS position fix time duration for measurement.
  7. 7 . The method of claim 1 , wherein the network scheduled duration for GNSS measurement is configured for the UE to further re-acquire downlink (DL) synchronization.
  8. 8 . The method of claim 1 , wherein the network scheduled duration for GNSS measurement is configured for the UE to further re-acquire system information block (SIB).
  9. 9 . The method of claim 1 , wherein the network scheduled duration for GNSS measurement is cell-specific indicated by a SIB or an RRC signaling or UE-specific indicated by an RRC signaling.
  10. 10 . A method, comprising: receiving, by a base station, global navigation satellite system (GNSS) assistance information from a user equipment (UE) in a non-terrestrial network (NTN), wherein the GNSS assistance information includes a GNSS position fix time duration for measurement; and transmitting a network scheduled duration for GNSS measurement to the UE, wherein the network scheduled duration for GNSS measurement is configured by one or more parameters, and being at least one of a scheduling gap and a GNSS timer.
  11. 11 . The method of claim 10 , further comprising: receiving a GNSS validity duration, and/or a remaining GNSS validity duration via MAC CE.
  12. 12 . The method of claim 11 , wherein the GNSS validity duration or the remaining GNSS validity duration is one value from {10 s, 20 s, 30 s, 40 s, 50 s, 60 s, 5 min, 10 min, 15 min, 20 min, 25 min, 30 min, 60 min, 90 min, 120 min, infinity}.
  13. 13 . The method of claim 10 , wherein the network scheduled duration for GNSS measurement is configured for the UE to further re-acquire a downlink (DL) synchronization.
  14. 14 . The method of claim 10 , wherein the network scheduled duration for GNSS measurement is configured for the UE to further re-acquire system information block (SIB).
  15. 15 . The method of claim 10 , wherein the network scheduled duration for GNSS measurement is cell-specific transmitted to the UE in a SIB or an RRC signal or is UE-specific transmitted to the UE in an RRC signal.
  16. 16 . The method of claim 10 , wherein neither downlink (DL) assignment nor uplink (UL) grant is scheduled during the network scheduled duration for GNSS measurement.
  17. 17 . The method of claim 10 , further comprising determining the UE being in a UE RRC_IDLE state when no scheduling request is received from the UE after a time period after an end of the network scheduled duration for GNSS measurement.
  18. 18 . A user equipment (UE), comprising: a detection module that detects one or more global navigation satellite system (GNSS) measurement triggering conditions in an RRC_CONNECTED state; a transceiver that receives a network scheduled duration for GNSS measurement from a network entity, wherein the network scheduled duration for GNSS measurement is indicated by one or more parameters and being at least one of a scheduling gap and a GNSS timer; and a GNSS control module that performs a GNSS position fix acquisition procedure in the network scheduled duration for GNSS measurement in the RRC_CONNECTED state, and leaves the RRC_CONNECTED state upon GNSS measurement is failed.
  19. 19 . The UE of claim 18 , wherein the transceiver further reports a GNSS validity duration, and a remaining GNSS validity duration via Media Access Control (MAC) Control Element (CE) in the RRC_CONNECTED, after acquiring a GNSS position fix in the network scheduled duration for GNSS measurement.
  20. 20 . The UE of claim 18 , wherein the one or more GNSS measurement triggering conditions include a GNSS position out-of-date condition in the RRC_CONNECTED state.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application is a continuation, and claims priority under 35 U.S.C. § 120 from nonprovisional U.S. patent application Ser. No. 18/448,084, entitled “SCHEMES ON GNSS POSITION FIX IN CONNECTED IN IOT NTN”, filed on Aug. 10, 2023, the subject matter of which is incorporated herein by reference. Application Ser. No. 18/448,084, in turn, claims priority under 35 U.S.C. § 120 and § 365(c) from International Application No. PCT/CN2022/102971, titled “Schemes on GNSS position fix in connected in IoT NTN,” with an international filing date of Jun. 30, 2022, and China application No. 202310652292.6, with a filing date of Jun. 2, 2023. The disclosure of each of the foregoing documents is incorporated herein by reference. TECHNICAL FIELD The disclosed embodiments relate generally to wireless communication, and, more particularly, to global navigation satellite system (GNSS) position fix in a radio resource control (RRC) connected state in non-terrestrial network (NTN). BACKGROUND The NTN system for data transmission, such as the internet of things (IoT) NTN network is a key development for the latest wireless network. In scenarios with large transmission delay, such as the IoT NTN, in order to ensure normal system operation, the UE in the NTN system needs a valid GNSS position fix, which is used to determine the UE's location. For short sporadic data transmissions, the UE acquires the GNSS position fix in the UE IDLE state. For large data transmissions in long connection time, IoT NTN UE may need to re-acquire a valid GNSS position fix. The schemes for UE to re-acquire GNSS position fix in the UE RRC_CONNECTED state is needed. Improvements and enhancements are required for the UE to re-acquire GNSS position fix in connected state. SUMMARY Apparatus and methods are provided for GNSS position fix in connected state. In one novel aspects, the method comprising: detecting, by a user equipment (UE), one or more global navigation satellite system (GNSS) measurement triggering conditions in an RRC_CONNECTED state; receiving, a network scheduled duration for GNSS measurement from a network entity, wherein the network scheduled duration for GNSS measurement is indicated by one or more parameters and being at least one of a scheduling gap and a GNSS timer; and performing a GNSS position fix acquisition procedure in the network scheduled duration for GNSS measurement in the RRC_CONNECTED state, and leaving the RRC_CONNECTED upon GNSS measurement is failed. In one novel aspects, the method comprising: receiving, by a base station, global navigation satellite system (GNSS) assistance information from a user equipment (UE) in a non-terrestrial network (NTN), wherein the GNSS assistance information includes a GNSS position fix time duration for measurement; transmitting a network scheduled duration for GNSS measurement to the UE, wherein the network scheduled duration for GNSS measurement is configured by one or more parameters, and being at least one of a scheduling gap and a GNSS timer. In one novel aspects, the user equipment (UE) comprising: a detection module that detects one or more global navigation satellite system (GNSS) measurement triggering conditions in an RRC_CONNECTED state; a transceiver that receives a network scheduled duration for GNSS measurement from a network entity, wherein the network scheduled duration for GNSS measurement is indicated by one or more parameters and being at least one of a scheduling gap and a GNSS timer; and a GNSS control module that performs a GNSS position fix acquisition procedure in the network scheduled duration for GNSS measurement in the RRC_CONNECTED state, and leaves the RRC_CONNECTED state upon GNSS measurement is failed. This summary does not purport to define the invention. The invention is defined by the claims. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, where like numerals indicate like components, illustrate embodiments of the invention. FIG. 1 illustrates a schematic system diagram illustrating an exemplary NTN system that the UE reacquires GNSS position fix in the RRC_CONNECTED state in accordance with embodiments of the current invention. FIG. 2 illustrates exemplary diagrams for UE acquiring GNSS signal with short transmission and long transmission in accordance with embodiments of the current invention. FIG. 3 illustrates exemplary diagrams for acquiring GNSS position fix in RRC_CONNECTED state in accordance with embodiments of the current invention. FIG. 4 illustrates an exemplary flow diagram for the UE to reacquire GNSS position fix based on network scheduled GNSS measurement gap in accordance with embodiments of the current invention. FIG. 5 illustrates an exemplary flow diagram for the UE to reacquire GNSS position fix based on network scheduled timer in accordance with embodiments of the current invention. FIG. 6 illustrates an exemplary flow diagram for the base station to configure the UE for re-acquiri