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CN-122003616-A - Method for measuring position in wireless communication system and apparatus therefor

CN122003616ACN 122003616 ACN122003616 ACN 122003616ACN-122003616-A

Abstract

According to various embodiments, a method of measuring a position by a terminal in a wireless communication system and an apparatus thereof are disclosed. A method and apparatus thereof are disclosed, the method including the steps of receiving a first signal and a second signal transmitted at a first time from a first anchor point and a second anchor point, receiving a third signal and a fourth signal transmitted at a second time from a third anchor point and a fourth anchor point, and calculating at least two reception time differences for measuring a position of a terminal based on the first signal to the fourth signal.

Inventors

  • HUANG ZAIGAO
  • XU HANPIE

Assignees

  • LG电子株式会社

Dates

Publication Date
20260508
Application Date
20241014
Priority Date
20231012

Claims (15)

  1. 1. A method, the method comprising: Receiving a first signal and a second signal transmitted at a first time from a first anchor point and a second anchor point; Receiving third and fourth signals transmitted at a second time from third and fourth anchor points, and Calculating at least two reception time differences for a position measurement of a User Equipment (UE) based on the first signal to the fourth signal, Wherein the third anchor point and the fourth anchor point are virtual anchor points obtained by shifting the positions of the first anchor point and the second anchor point by an amount of position change of the UE measured during a time interval between the first time and the second time.
  2. 2. The method of claim 1, wherein the UE selects at least three anchors based on a channel state of each of the first, second, third, and fourth anchors or whether each of the first, second, third, and fourth anchors is located in a line of sight (LOS) environment, and Wherein the at least two receive time differences are calculated based on signals corresponding to the at least three anchor points.
  3. 3. The method of claim 1, wherein each of the time of receipt of the third signal and the time of receipt of the fourth signal is corrected based on the time interval, and Wherein the at least two reception time differences are calculated based on the reception time of the first signal, the reception time of the second signal, the corrected reception time of the third signal and the corrected reception time of the fourth signal.
  4. 4. The method of claim 1, wherein the location of the UE is calculated based on a synchronization error between the first anchor and the second anchor being greater than or equal to a predetermined error threshold, based only on a receive time difference between the first anchor and the third anchor corresponding to the first anchor and a receive time difference between the second anchor and the fourth anchor corresponding to the second anchor.
  5. 5. The method of claim 1, wherein the UE calculates a plurality of receive time differences based on the first signal to the fourth signal, and Wherein the at least two receive time differences are selected from among the plurality of receive time differences based on a channel state of each of the first anchor, the second anchor, the third anchor, and the fourth anchor, or whether each of the first anchor, the second anchor, the third anchor, and the fourth anchor is located in a line-of-sight (LOS) environment.
  6. 6. The method of claim 1, wherein the first anchor and the second anchor are two anchors selected from a plurality of anchors based on a channel state at the first time and whether a line of sight (LOS) condition exists at the first time.
  7. 7. The method of claim 1, further comprising reporting information about the amount of position change to the first anchor point or the second anchor point for changing a transmission period of the first signal and the second signal.
  8. 8. The method of claim 1, wherein the amount of position change is calculated based on an Inertial Measurement Unit (IMU) sensor.
  9. 9. A computer-readable recording medium storing a program for executing the method according to claim 1.
  10. 10. A User Equipment (UE), the UE comprising: radio Frequency (RF) transceiver, and A processor, said processor being connected to said RF transceiver, Wherein the processor is configured to: Controlling the RF transceiver to receive first and second signals corresponding to a first time from first and second anchor points; Controlling the RF transceiver to receive third and fourth signals corresponding to a second time from third and fourth anchor points; Calculating at least two reception time differences for location measurement of the UE based on the first to fourth signals, and Wherein the third anchor point and the fourth anchor point are virtual anchor points obtained by shifting the positions of the first anchor point and the second anchor point by an amount of position change of the UE measured during a time interval between the first time and the second time.
  11. 11. A processing device configured to control a User Equipment (UE), the processing device comprising: At least one processor, and At least one memory connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the UE to: receiving a first signal and a second signal corresponding to a first time from a first anchor point and a second anchor point; Receiving a third signal and a fourth signal corresponding to a second time from a third anchor point and a fourth anchor point, and Calculating at least two reception time differences for location measurement of the UE based on the first signal to the fourth signal, Wherein the third anchor point and the fourth anchor point are virtual anchor points obtained by shifting the positions of the first anchor point and the second anchor point by an amount of position change of the UE measured during a time interval between the first time and the second time.
  12. 12. A method, the method comprising: measuring, at a first anchor point, first receive time information for a first User Equipment (UE) signal transmitted at a first time and a second UE signal transmitted at a second time for the UE; Receiving information from the first UE regarding an amount of position change between the first time and the second time; Receiving from a second anchor point second time of receipt information for said first UE signal and said second UE signal measured at said second anchor point, and The location of the UE is measured based on the location change amount, the first reception time information, and the second reception time information.
  13. 13. A computer-readable recording medium storing a program for executing the method according to claim 12.
  14. 14. A first anchor, the first anchor comprising: radio Frequency (RF) transceiver, and A processor, said processor being connected to said RF transceiver, Wherein the processor is configured to control the RF transceiver to: measuring, at the first anchor point, first receive time information for a first UE signal transmitted at a first time for a UE and a second UE signal transmitted at a second time for the UE; Receiving information from the UE regarding an amount of change in position between the first time and the second time; Receiving from a second anchor point second time of receipt information for said first UE signal and said second UE signal measured at said second anchor point, and The location of the UE is measured based on the location change amount, the first reception time information, and the second reception time information.
  15. 15. A processing device configured to control a first anchor, the processing device comprising: At least one processor, and At least one memory connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first anchor to: measuring, at the first anchor point, first receive time information for a first UE signal for a UE transmitted at a first time and a second UE signal for the UE transmitted at a second time; Receiving information from the UE regarding an amount of change in position between the first time and the second time; Receiving from a second anchor point second time of receipt information for said first UE signal and said second UE signal measured at said second anchor point, and The location of the UE is measured based on the location change amount, the first reception time information, and the second reception time information.

Description

Method for measuring position in wireless communication system and apparatus therefor Technical Field The present disclosure relates to a method of measuring a position by a User Equipment (UE) in a wireless communication system and an apparatus therefor. Background Wireless communication systems are being widely deployed to provide various types of communication services such as voice and data. In general, a wireless communication system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of multiple-access systems include Code Division Multiple Access (CDMA) systems, frequency Division Multiple Access (FDMA) systems, time Division Multiple Access (TDMA) systems, orthogonal Frequency Division Multiple Access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and multiple carrier frequency division multiple access (MC-FDMA) systems. The Side Link (SL) refers to a communication method in which a direct link is established between User Equipments (UEs) and the UEs directly exchange voice or data without passing through a Base Station (BS). SL is considered as a solution to solve the burden of the base station BS due to the fast-growing data traffic. Vehicle-to-everything (V2X) is a communication technology in which a vehicle exchanges information with another vehicle, pedestrians, and infrastructure through wired/wireless communication. V2X can be divided into four types, vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-network (V2N), and vehicle-to-pedestrian (V2P). V2X communication may be provided via a PC5 interface and/or Uu interface. As more and more communication devices require greater communication capacity in transmitting and receiving signals, improved mobile broadband communication over conventional radio access technologies is required. Thus, communication systems are being discussed that consider reliability and latency sensitive services/UEs. The next generation radio access technology considering enhanced mobile broadband communication, large-scale Machine Type Communication (MTC), and ultra-reliable and low-latency communication (URLLC) may be referred to as a new Radio Access Technology (RAT) or a New Radio (NR). Even in NR, vehicle-to-everything (V2X) communication can be supported. Fig. 1 is a diagram comparing RAT-based V2X communication before NR with NR-based V2X communication. Regarding V2X communication, in a RAT before NR, schemes for providing security services based on V2X messages such as Basic Security Message (BSM), cooperative sensing message (CAM), and distributed environment notification message (denom) are mainly discussed. The V2X message may include location information, dynamic information, and attribute information. For example, the UE may send a periodic message type CAM and/or an event trigger message type denom to another UE. For example, the CAM may include dynamic state information about the vehicle (such as direction and speed), vehicle static data (such as size), and basic vehicle information (such as external lighting conditions and route details). For example, the UE may broadcast the CAM and the CAM latency may be less than 100 ms. For example, when an unexpected situation such as a vehicle malfunction or accident occurs, the UE may generate the denom and transmit the denom to another UE. For example, all vehicles within the transmission range of the UE may receive CAM and/or denom. In this case, denom may have a higher priority than CAM. With respect to V2X communication, various V2X scenarios are subsequently introduced in NR. For example, various V2X scenarios may include vehicle queuing, advanced driving, extension sensors, and remote driving. For example, based on vehicle queuing, vehicles may be dynamically formed into groups and moved together. For example, to perform a queuing operation based on vehicle queuing, vehicles belonging to the group may receive periodic data from the lead vehicle. For example, vehicles belonging to the group may decrease or increase the distance between vehicles based on the periodic data. For example, the vehicle may be semi-automatic or fully automatic based on advanced driving. For example, each vehicle may adjust the trajectory or maneuver based on data acquired from local sensors of nearby vehicles and/or nearby logical entities. Further, for example, each vehicle may share driving intent with nearby vehicles. For example, raw or processed data acquired by local sensors, or live video data, may be exchanged between the vehicle, logical entity, pedestrian's UE, and/or V2X application server based on the extended sensors. Thus, for example, a vehicle may identify an environment that is improved relative to an environment that may be detected using its own sensors. For example, for a person who cannot drive or a remote vehicle located in a dangerous