EP-4741884-A1 - METHOD FOR PERFORMING POSITIONING ON BASIS OF MULTIPLE TRANSMISSION BEAMS OF NTN BASE STATION IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR

EP4741884A1EP 4741884 A1EP4741884 A1EP 4741884A1EP-4741884-A1

Abstract

The present disclosure relates to a method performed by a user equipment (UE) in a wireless communication system. Specifically, the method comprises the steps of: receiving a best transmission beam from a non-terrestrial network (NTN) base station; obtaining beam information on the basis of the best transmission beam; and calculating a distance to the UE from a reference location in a cell coverage of the NTN base station on the basis of the beam information and a beam index of the best transmission beam.

Inventors

NAM, Jonggil
KO, WOOSUK
SEO, HANBYUL
LEE, SEUNGMIN

Assignees

LG Electronics Inc.

Dates

Publication Date: 20260513
Application Date: 20240618

Claims (12)

A method performed by a user equipment (UE) in a wireless communication system, the method comprising: receiving a best transmission beam from a non-terrestrial network (NTN) base station (BS); obtaining beam information based on the best transmission beam; and calculating a distance of the UE from a reference location within a cell coverage of the NTN BS based on the beam information and a beam index of the best transmission beam.
The method of claim 1, wherein the obtaining of the beam information includes: receiving system information based on the best transmission beam; and obtaining the beam information included in the system information.
The method of claim 1, wherein the bam information includes information about a number of transmission beams transmitted from the NTN BS and information about a relative distance of the transmission beams from the reference location.
The method of claim 3, wherein a transmission beam with a lowest index is related with a reference location within the cell coverage, and a transmission beam with a highest index is related with a boundary of the cell coverage.
The method of claim 1, further comprising performing a location-based trigger condition handover to an adjacent NTN BS from the NTN BS based on a distance of the UE from a reference location within a cell coverage of the NTN BS being greater than or equal to a threshold.
A user equipment (UE) in a wireless communication system, the UE comprising: at least one transceiver; at least one processor; and at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations for the UE, wherein the operations include: receiving a best transmission beam from a non-terrestrial network (NTN) base station (BS); obtaining beam information based on the best transmission beam; and calculating a distance of the UE from a reference location within a cell coverage of the NTN BS based on the beam information and a beam index of the best transmission beam.
The UE of claim 6, wherein the obtaining of the beam information includes: receiving system information based on the best transmission beam; and obtaining the beam information included in the system information.
The UE of claim 7, wherein the bam information includes information about a number of transmission beams transmitted from the NTN BS and information about a relative distance of the transmission beams from the reference location.
The UE of claim 8, wherein a transmission beam with a lowest index is related with a reference location within the cell coverage, and a transmission beam with a highest index is related with a boundary of the cell coverage.
The UE of claim 6, wherein the operations further include performing a location-based trigger condition handover to an adjacent NTN BS from the NTN BS based on a distance of the UE from a reference location within a cell coverage of the NTN BS being greater than or equal to a threshold.
A processing device in a wireless communication system, the processing device comprising: at least one processor; and at least one computer memory operably connectable to the at least one processor, and storing instructions that, when executed, cause the at least one processor to perform operations for a user equipment (UE), wherein the operations include: receiving a best transmission beam from a non-terrestrial network (NTN) base station (BS); obtaining beam information based on the best transmission beam; and calculating a distance of the UE from a reference location within a cell coverage of the NTN BS based on the beam information and a beam index of the best transmission beam.
A computer-readable storage medium, the storage medium storing at least one program code including instructions that, when executed, cause at least one processor to perform operations for a user equipment (UE), wherein the operations include: receiving a best transmission beam from a non-terrestrial network (NTN) base station (BS); obtaining beam information based on the best transmission beam; and calculating a distance of the UE from a reference location within a cell coverage of the NTN BS based on the beam information and a beam index of the best transmission beam.

Description

TECHNICAL FIELD This specification relates to a wireless communication system, and particularly, to a method of performing positioning based on multiple transmission beams of a non-terrestrial network (NTN) base station (BS) in a wireless communication system and an apparatus for the method. 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 (bandwidth, transmission power, etc.). Examples of the multiple access system include a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, and a single carrier frequency division multiple access (SC-FDMA) system, and a multi carrier frequency division multiple access (MC-FDMA) system. Sidelink (SL) refers to a communication scheme in which a direct link is established between user equipments (UEs) and the UEs directly exchange voice or data without intervention of a base station (BS). SL is considered as a solution of relieving the BS of the constraint of rapidly growing data traffic. Vehicle-to-everything (V2X) is a communication technology in which a vehicle exchanges information with another vehicle, a pedestrian, and infrastructure by wired/wireless communication. V2X may be categorized 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 a Uu interface. As more communication devices require a larger communication capacity, there is a need for improved mobile broadband communication, compared to existing radio access technology (RAT). Accordingly, communication systems that take into account services or UEs sensitive to reliability and latency are under discussion, and the next-generation wireless access technology that takes into account improved mobile broadband communication, massive machine type communication (MTC), and ultra-reliable and low latency communication (URLLC) may be referred to as new RAT or new radio (NR). V2X communication may also be supported in NR. DISCLOSURE Technical Problem Based on the discussion described above, the following proposes a method of performing positioning based on multiple transmission beams of a non-terrestrial network (NTN) base station (BS) in a wireless communication system and an apparatus for the method. The objects to be achieved with the present disclosure are not limited to what has been particularly described hereinabove and other objects not described herein will be more clearly understood by persons skilled in the art from the following detailed description. Technical Solution According to an aspect of the present specification, a method performed by a user equipment (UE) in a wireless communication system is provided. The method includes receiving a best transmission beam from a non-terrestrial network (NTN) base station (BS), obtaining beam information based on the best transmission beam, and calculating a distance of the UE from a reference location within a cell coverage of the NTN BS based on the beam information and a beam index of the best transmission beam. According to an aspect of the present specification, a method performed by a UE in a wireless communication system is provided. The UE includes at least one transceiver, at least one processor, and at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations for the UE. The operations may include receiving a best transmission beam from a non-terrestrial network (NTN) base station (BS), obtaining beam information based on the best transmission beam, and calculating a distance of the UE from a reference location within a cell coverage of the NTN BS based on the beam information and a beam index of the best transmission beam. According to another aspect of the present specification, a processing device in a wireless communication system is provided. The processing device includes at least one processor, and at least one computer memory operably connectable to the at least one processor, and storing instructions that, when executed, cause the at least one processor to perform operations for a user equipment (UE). The operations may include receiving a best transmission beam from a non-terrestrial network (NTN) base station (BS), obtaining beam information based on the best transmission beam, and calculating a distance of the UE from a reference location within a cell coverage of the NTN BS based on the beam information and a beam index of the best transmission beam. According to another aspe