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EP-4280637-B1 - METHOD FOR TRANSMITTING MESSAGE BY USER EQUIPMENT IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR

EP4280637B1EP 4280637 B1EP4280637 B1EP 4280637B1EP-4280637-B1

Inventors

  • HWANG, JAEHO
  • KIM, HAKSEONG
  • SEO, HANBYUL

Dates

Publication Date
20260506
Application Date
20220114

Claims (8)

  1. A method performed by a first user equipment, UE, (10, 100) comprising: obtaining (S201) status information including mobility information , change amount information, and internal status information about the first UE (10, 100); calculating (S203) severity levels for each of a risk of an accident, an exposure, and a controllability for a user of the first UE (10, 100) based on the status information; and periodically transmitting (S207) a message including the severity levels by direct communication (150b) between UEs, wherein a transmission period of the message is determined (S205) corresponding to at least one of the severity levels, and wherein the mobility information is measured based on a first positioning mode, wherein the first UE (10, 100) determines (S205) whether to change the first positioning mode based on a weighted sum of the severity levels, wherein the severity levels are calculated by applying a weight determined based on station type information of the first UE (10, 100).
  2. The method of claim 1, wherein the status information includes the mobility information including a position and speed of the first UE (10, 100), mobility change information including an amount of change in heading direction and acceleration of the first UE (10, 100), and internal status information including an application type and number of applications running on the first UE (10, 100), wherein the severity levels include a first severity level for the risk, a second severity level for the urgency, and a third severity level for the controllability.
  3. The method of claim 2, wherein the first severity level is calculated by applying the weight to a weighted sum of the speed and the position, the second severity level is calculated by applying the weight to a weighted sum of the change in heading direction and the acceleration, and the third severity level is calculated based on a count value according to the application type and number of applications running on the first UE (10, 100).
  4. The method of claim 1, wherein the first positioning mode is changed to a second positioning mode among a plurality of positioning modes based on the weighted sum of the severity levels being greater than or equal to a first threshold, and wherein the plurality of positioning modes include a power saving mode method of turning off all positioning devices, an inertial measurement unit based positioning mode, a global positioning system based positioning mode, a differential global positioning system based positioning mode, a real time kinematic based positioning mode, and a positioning mode using wireless communication.
  5. The method of claim 3, wherein the first UE (10, 100) determines (S205) an internal operation mode for the first UE (10, 100) based on the weighted sum of the first severity level, the second severity level, and the third severity level, and wherein the internal operation mode has parameters preconfigured to control at least one of a sleep timing of an application included in the first UE (10, 100), a display included in the first UE (10, 100), or a human machine interface, HMI, included in the first UE (10, 100).
  6. The method of claim 1, wherein the internal status information comprises the number of applications running on the first UE (10, 100), types of the applications, a battery status, a connection status of an external output device, an operation status of a display, and information about whether a user of the first UE (10, 100) is viewing the display.
  7. A first user equipment, UE (10, 100), comprising: a radio frequency, RF, transceiver (106); and a processor (102) coupled to the RF transceiver (106), wherein the first UE is configured to perform the method of claim 1.
  8. A computer-readable recording medium (104) having recorded thereon a program, which, when executed by a user equipment, UE, causes the UE to perform the method of claim 1.

Description

[Technical Field] The present disclosure relates to a method for transmitting a message by a first vehicle to everything (V2X) terminal in a wireless communication system supporting a sidelink, and a device therefor. [Background Art] Wireless communication systems have been widely deployed to provide various types of communication services such as voice or data. In general, a wireless communication system is a multiple access system that supports communication of multiple users by sharing available system resources (a bandwidth, transmission power, etc.). Examples of multiple access systems 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, a single carrier frequency division multiple access (SC-FDMA) system, and a multi carrier frequency division multiple access (MC-FDMA) system. A sidelink (SL) refers to a communication method in which a direct link is established between user equipment (UE), and voice or data is directly exchanged between terminals without going through a base station (BS). SL is being considered as one way to solve the burden of the base station due to the rapidly increasing data traffic. V2X (vehicle-to-everything) refers to a communication technology that exchanges information with other vehicles, pedestrians, and infrastructure-built objects through wired/wireless communication. V2X may 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 through a PC5 interface and/or a Uu interface. As more and more communication devices require larger communication capacities in transmitting and receiving signals, there is a need for mobile broadband communication improved from the legacy radio access technology. Accordingly, communication systems considering services/UEs sensitive to reliability and latency are under discussion. A next-generation radio access technology in consideration of enhanced mobile broadband communication, massive Machine Type Communication (MTC), and Ultra-Reliable and Low Latency Communication (URLLC) may be referred to as new radio access technology (RAT) or new radio (NR). Even in NR, vehicle-to-everything (V2X) communication may be supported. FIG. 1 is a diagram comparing RAT-based V2X communication before NR with NR-based V2X communication. Regarding V2X communication, in RAT prior to NR, a scheme for providing a safety service based on V2X messages such as a basic safety message (BSM), a cooperative awareness message (CAM), and a decentralized environmental notification message (DENM) was mainly discussed. The V2X message may include location information, dynamic information, and attribute information. For example, the UE may transmit a periodic message type CAM and/or an event triggered message type DENM to another UE. For example, the CAM may include dynamic state information about a vehicle such as direction and speed, vehicle static data such as dimensions, and basic vehicle information such as external lighting conditions and route details. For example, a UE may broadcast the CAM, and the CAM latency may be less than 100 ms. For example, when an unexpected situation such as a breakdown of the vehicle or an accident occurs, the UE may generate a DENM and transmit the same to another UE. For example, all vehicles within the transmission coverage of the UE may receive the CAM and/or DENM. In this case, the DENM may have a higher priority than the CAM. Regarding V2X communication, various V2X scenarios have been subsequently introduced in NR. For example, the various V2X scenarios may include vehicle platooning, advanced driving, extended sensors, and remote driving. For example, based on vehicle platooning, vehicles may dynamically form a group and move together. For example, to perform platoon operations based on vehicle platooning, vehicles belonging to the group may receive periodic data from a leading vehicle. For example, the vehicles belonging to the group may reduce or increase the distance between the vehicles based on the periodic data. For example, based on advanced driving, a vehicle may be semi-automated or fully automated. For example, each vehicle may adjust trajectories or maneuvers based on data acquired from local sensors of nearby vehicles and/or nearby logical entities. Also, for example, each vehicle may share driving intention with nearby vehicles. For example, on the basis of extended sensors, raw data or processed data acquired through local sensors, or live video data may be exchanged between a vehicle, a logical entity, UEs of pedestrians and/or a V2X application server. Thus, for example, the vehicle may recognize an environment that is improved over an environment that may be detected using its own sensor. For example, for a person who cannot drive