US-12627953-B2 - Method for transmitting first message by first device in wireless communication system supporting sidelink, and device therefor

US12627953B2US 12627953 B2US12627953 B2US 12627953B2US-12627953-B2

Abstract

According to various embodiments, disclosed are a method for transmitting a first message by a first device in a wireless communication system supporting sidelink, and a device therefor. Disclosed are the method and the device for same, the method comprising the steps of: receiving a first request message for requesting transmission of the first message on the basis of a bypass interface; transmitting a response message for acknowledging transmission of the first message; and transmitting a second message, which has been received from the network, as the first message on the basis of the bypass interface, wherein the bypass interface is an interface for transmitting the second message, which has been received through a first interface, as the first message through a second interface without involvement of an application layer of the first device, and the response message includes channel information related to the second interface.

Inventors

Jaeho Hwang
Hakseong Kim
Hanbyul Seo

Assignees

LG ELECTRONICS INC.

Dates

Publication Date: 20260512
Application Date: 20210426
Priority Date: 20200428

Claims (9)

1 . A method performed by a first device, the method comprising: receiving, through a first interface, a request message for requesting a transmission of a message based on a bypass interface; transmitting, through the first interface, a response message including first information related to a second interface based on the request message; receiving, through the first interface, a second message including a control field related to the bypass interface and a V2X (vehicle to everything) message from a network based on the bypass interface; and transmitting a first message including the V2X message to neighboring devices through the second interface based on the bypass interface, wherein the first information includes information on resources that are sensed as not being occupied by other devices within a resource pool for the second interface, and a channel busy ratio (CBR) for the second interface, wherein the control field includes transmission parameters for the second interface that are determined by the network based on the resources and the CBR, and wherein the first message is transmitted, without being processed by an application layer of the first device, using only the transmission parameters.
2 . The method according to claim 1 , wherein the first information further includes a subchannel index for a channel related to the second interface, channel quality information, service information, and a configuration parameter related to the first device.
3 . The method according to claim 1 , wherein the second message includes the first message preconfigured as a message type of the second interface.
4 . The method according to claim 1 , wherein the second message is converted into the first message by removing the control field and a first header related to the bypass interface by the bypass interface.
5 . The method according to claim 4 , wherein the first message is transmitted as a message type of any one of a cooperative awareness message (CAM), a vulnerable road user awareness message (VAM), a collective perception message (CPM), a decentralized environmental notification message (DENM), a basic safety message (BSM), a pedestrian safety message (PSM), a maneuver coordination message (MCM), a road safety message (RSM), a signal phase & timing message (SPAT), and a map data (MAP), which are associated with the second interface based on type information included in the first header.
6 . The method according to claim 1 , wherein the first message includes information for a generation time corresponding to a generation time of the second message in the network.
7 . The method according to claim 1 , wherein the first interface is an interface for wired or wireless communication with the network; and wherein the second interface is a PC5 interface or a direct communication interface related to dedicated short-range communication (DSRC).
8 . A first device comprising: a radio frequency (RF) transceiver; and a processor connected to the RF transceiver, wherein the processor is configured to: receive, through a first interface, a request message for requesting a transmission of a message based on a bypass interface, under control of the RF transceiver; transmit, through the first interface, a response message including first information related to a second interface based on the request message; receiving, through the first interface, a second message including a control field related to the bypass interface and a V2X (vehicle to everything) message from a network using the bypass interface; and transmit a first message including the V2X message to neighboring devices through the second interface based on the bypass interface, wherein the first information includes information on resources that are sensed as not being occupied by other devices within a resource pool for the second interface, and a channel busy ratio (CBR) for the second interface, wherein the control field includes transmission parameters for the second interface that are determined by the network based on the resources and the CBR, and wherein the V2X message is transmitted, without being processed by an application layer of the first device, using only the transmission parameters.
9 . A non-transitory computer-readable storage medium configured to store at least one computer program including instructions used to transmit a first message in a wireless communication system supporting sidelink, the computer-readable storage medium comprising: at least one computer program for at least one processor to perform specific operations of transmitting the first message by a first device; and a computer-readable storage medium configured to store the at least one computer program, wherein the specific operations include: receiving, through a first interface, a request message for requesting a transmission of a message based on a bypass interface; transmitting, through the first interface, a response message including first information related to a second interface based on the request message; receiving, through the first interface, a second message including a control field related to the bypass interface and a V2X (vehicle to everything) message from a network using the bypass interface; and transmitting a first message including the V2X message to neighboring devices through the second interface based on the bypass interface, wherein the first information includes information on resources that are sensed as not being occupied by other devices within a resource pool for the second interface, and a channel busy ratio (CBR) for the second interface, wherein the control field includes transmission parameters for the second interface that are determined by the network based on the resources and the CBR, and wherein the first message is transmitted, without being processed by an application layer of the first device, using only the transmission parameters obtained from the second message.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a National Stage application under 35 U.S.C. § 371 of International Application No. PCT/KR2021/005216, filed Apr. 26, 2021, which claims the benefit of Korean Application No. 10-2020-0051683, filed on Apr. 28, 2020. The disclosures of the prior applications are incorporated by reference in their entirety. TECHNICAL FIELD Embodiments of the present disclosure relate to a method for allowing a first device to transmit a first message based on a bypass interface in a wireless communication system supporting sidelink, and a device for the same. 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 UEs 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 ex