Apparatus and method for side link resource configuration and allocation for assisting direct communication in a wireless communication system

Abstract

The present disclosure relates to a communication method and system for integrating a fifth generation (5G) communication system supporting a higher data rate beyond the fourth generation (4G) system with the Internet of Things (IoT) technology. The present disclosure can be applied to intelligent services based on 5G communication technology and IoT-related technologies, such as smart homes, smart buildings, smart cities, smart cars, connected cars, healthcare, digital education, smart retail, safety and security services. The operating method of a terminal in a wireless communication system may include activating side link mode ‑2 (d) and obtaining side link radio resource configuration information of other terminals, and sending the obtained side link radio resource configuration information to a target terminal. The operating method of a terminal in a wireless communication system may include activating side link mode ‑2 (d) and receiving side link radio resource configuration information from other terminals, and allocating side link radio resources to a base station or the terminal itself using the received side link radio resource configuration information.

Description

Technical Field

[0001] The present disclosure generally relates to a wireless communication system, and more particularly, to an apparatus and method for allocating resources required for data transmission of a direct communication bearer in a wireless communication system. Background Art

[0002] In order to meet the demand for increased wireless data traffic since the deployment of 4G communication systems, efforts have been made to develop improved 5G or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also referred to as "super 4G networks" or "post-LTE systems". 5G communication systems are considered to be implemented in higher frequency (millimeter wave) bands (e.g., 60GHz bands) in order to achieve higher data rates. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple input multiple output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology are discussed in 5G communication systems. In addition, in 5G communication systems, system network improvements are being developed based on advanced small cells, cloud radio access networks (RANs), ultra-dense networks, device-to-device (D2D) communications, wireless backhaul, mobile networks, collaborative communications, coordinated multipoints (CoMP), receiving-end interference elimination, etc. In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) have been developed as advanced coded modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies.

[0003] The Internet, which is a human-centered connected network in which humans generate and consume information, is now developing toward the Internet of Things (IoT), in which distributed entities (such as things) exchange and process information without human intervention. The Internet of Everything (IoE), which is a combination of IoT technology and big data processing technology through connection with a cloud server, has emerged. As IoT implementation requires technical elements such as "sensing technology", "wired / wireless communication and network infrastructure", "service interface technology" and "security technology", sensor networks, machine-to-machine (M2M) communication, machine type communication (MTC), etc. have been studied recently.

[0004] Such an IoT environment can provide intelligent Internet technology services that create new value for human life by collecting and analyzing data generated between connected things. IoT can be applied to various fields, including smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, healthcare, smart appliances, and advanced medical services, through the integration and combination of existing information technology (IT) and various industrial applications.

[0005] In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, machine type communications (MTC), and machine-to-machine (M2M) communications can be implemented through beamforming, MIMO, and array antennas. Cloud radio access networks (RANs) as an application of the above-mentioned big data processing technologies can also be considered as an example of the fusion of 5G technologies and IoT technologies.

[0006] In the 5G system, wireless interface schemes for providing services with various quality of service (QoS) requirements have been discussed. For example, a direct communication scheme for vehicle-to-everything (V2X) terminals has been provided. In addition, various discussions are underway to shorten communication time, increase reliability, and support direct communication between terminals more efficiently. Vehicle-to-everything (V2X) is a general term that refers to all forms of communication that can be applied to road vehicles, and by combining with wireless communication technology, it is becoming available for various additional services in addition to the initial safety usage scenarios.

[0007] The above information is provided as background information only to assist with an understanding of the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with respect to the present disclosure. Summary of the invention

[0008] Technical issues

[0009] Based on the above discussion, the present disclosure provides a method for performing communication in a vehicle communication system in a direct communication system between terminals, and provides an apparatus and method for supporting vehicle communication services and data transmission with high reliability and low latency requirements.

[0010] The technical subjects pursued in the present disclosure are not limited to the aforementioned technical subjects, and other technical subjects not mentioned may be clearly understood by those skilled in the art to which the present disclosure belongs through the following description.

[0011] Solution to the problem

[0012] According to an embodiment of the present disclosure for solving the above-mentioned problem, a method for a terminal in a wireless communication system may include: determining whether mode-2(d) sidelink wireless communication has been configured based on at least one predetermined condition; if mode-2(d) sidelink wireless communication has been configured, determining whether an auxiliary terminal function has been activated; if the auxiliary terminal function has been activated, identifying at least one target terminal; and receiving information about mode-2(d) sidelink wireless communication from the identified target terminal.

[0013] At the same time, according to another embodiment of the present disclosure, a terminal in a wireless communication system may include a transceiver and a controller, the controller being used to control the transceiver to: determine whether mode-2(d) side link wireless communication has been configured based on the transceiver and at least one predetermined condition; if mode-2-(d) side link wireless communication has been configured, determine whether an auxiliary terminal function has been activated; if the auxiliary terminal function has been activated, identify at least one target terminal; and receive information about mode-2(d) side link wireless communication from the identified target terminal.

[0014] Advantageous Effects of the Invention

[0015] The devices and methods according to various embodiments of the present disclosure provide a method capable of using direct communication between terminals in a vehicle communication system to support vehicle communication services requiring various qualities of service (QoS), and provide a method for reducing the delay until direct communication resources are acquired and reducing uplink and downlink signaling required to acquire direct communication resources between multiple terminals and base stations, thereby achieving reliability and low latency requirements in vehicle communications.

[0016] Effects obtained in the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned above can be clearly understood by those skilled in the art from the following description.

[0017] Before proceeding to the following detailed description, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document: the terms "include" and "comprising" and their derivatives mean inclusion rather than limitation; the term "or" is inclusive, meaning and / or; the phrases "associated with" and "associated with" and their derivatives may mean including, included within, interconnected with, containing, contained within, connected to or connected with, coupled to or coupled with, communicable with, cooperating with, interlaced, juxtaposed, proximate, bound to or bound with, having, having the property of, and the like; and the term "controller" means any device, system, or portion thereof that controls at least one operation, such device may be implemented in hardware, firmware, or software, or some combination of at least two thereof. It should be noted that the functionality associated with any particular controller may be centralized or distributed, whether local or remote.

[0018] In addition, the various functions described below can be implemented or supported by one or more computer programs, each of which is formed by a computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, processes, functions, objects, classes, instances, related data or parts thereof suitable for implementation in a suitable computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code and executable code. The phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as a read-only memory (ROM), a random access memory (RAM), a hard drive, a compact disk (CD), a digital video disk (DVD) or any other type of memory. "Non-transitory" computer-readable media does not include wired, wireless, optical or other communication links that transmit temporary electrical signals or other signals. Non-transitory computer-readable media include media in which data can be permanently stored and media in which data can be stored and rewritten later, such as rewritable optical disks or erasable memory devices.

[0019] Definitions for certain words and phrases are provided throughout this patent document, those of ordinary skill in the art should understand that in many, if not most instances, such definitions apply to prior, as well as future uses of such defined words and phrases. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description in conjunction with the accompanying drawings, in which like reference numerals represent like parts:

[0021] Figure 1 A wireless communication system according to various embodiments of the present disclosure is shown;

[0022] Figure 2 The configuration of a base station in a wireless communication system according to various embodiments of the present disclosure is shown;

[0023] Figure 3 The configuration of a terminal in a wireless communication system according to various embodiments of the present disclosure is shown;

[0024] FIG4A shows a configuration of a communicator in a wireless communication system according to various embodiments of the present disclosure;

[0025] FIG4B shows a configuration of a communicator in a wireless communication system according to various embodiments of the present disclosure;

[0026] FIG4C shows a configuration of a communicator in a wireless communication system according to various embodiments of the present disclosure;

[0027] Figure 5A shows a case where direct communication between terminals is performed by using a sidelink radio access technology (RAT) according to various embodiments of the present disclosure;

[0028] Figure 5 B shows a case where direct communication between terminals is performed by using a sidelink radio access technology (RAT) according to various embodiments of the present disclosure;

[0029] Figure 5 C shows a case where direct communication between terminals is performed by using a sidelink radio access technology (RAT) according to various embodiments of the present disclosure;

[0030] Figure 5 D shows a case where direct communication between terminals is performed by using a sidelink radio access technology (RAT) according to various embodiments of the present disclosure;

[0031] FIG6A illustrates a scenario of Mode 2(d) of an operating sidelink resource allocation scheme according to various embodiments of the present disclosure;

[0032] FIG6B illustrates a scenario of Mode 2(d) of an operating sidelink resource allocation scheme according to various embodiments of the present disclosure;

[0033] FIG6C illustrates a scenario of Mode 2(d) of an operating sidelink resource allocation scheme according to various embodiments of the present disclosure;

[0034] FIG7A illustrates the operation of a terminal triggering side link mode-2(d) according to various embodiments of the present disclosure;

[0035] FIG7B illustrates the operation of a terminal triggering side link mode-2(d) according to various embodiments of the present disclosure;

[0036] FIG8A illustrates a signal process for notifying capability information of a terminal supporting side link mode-2(d) according to various embodiments of the present disclosure;

[0037] 8B shows a signal process for notifying capability information of a terminal supporting side link mode-2(d) according to various embodiments of the present disclosure;

[0038] 8C shows a signal process for notifying capability information of a terminal supporting side link mode-2(d) according to various embodiments of the present disclosure;

[0039] FIG9A shows a signaling process for acquiring information required for side link resource allocation according to various embodiments of the present disclosure;

[0040] FIG9B illustrates a signaling process for acquiring information required for side link resource allocation according to various embodiments of the present disclosure;

[0041] FIG9C illustrates a signaling process for acquiring information required for sidelink resource allocation according to various embodiments of the present disclosure;

[0042] FIG9D illustrates a signaling process for acquiring information required for side link resource allocation according to various embodiments of the present disclosure;

[0043] FIG9E illustrates a signaling process for acquiring information required for side link resource allocation according to various embodiments of the present disclosure;

[0044] FIG. 10A shows a signaling process for configuring side link resource allocation information according to various embodiments of the present disclosure; and

[0045] FIG. 10B illustrates a signaling process for configuring sidelink resource allocation information according to various embodiments of the present disclosure. DETAILED DESCRIPTION

[0046] Discussed below Figure 1 to Figure 1 The various embodiments used to describe the principles of the present disclosure in this patent document are merely illustrative and should not be interpreted as limiting the scope of the present disclosure in any way. Those skilled in the art will appreciate that the principles of the present disclosure can be implemented in any appropriately arranged system or device.

[0047] The terms used in the present disclosure are only used to describe specific embodiments and are not intended to limit the present disclosure. Singular expressions may include plural expressions unless the terms are clearly different in context. Unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as the meanings commonly understood by those skilled in the art to which the present disclosure belongs. These terms defined in commonly used dictionaries may be interpreted as having the same meanings as the contextual meanings in the relevant field, and unless clearly defined in the present disclosure, are not interpreted as having ideal or overly formal meanings. In some cases, even the terms defined in the present disclosure should not be interpreted as excluding embodiments of the present disclosure.

[0048] Hereinafter, various embodiments of the present disclosure will be described based on a hardware approach. However, various embodiments of the present disclosure include techniques using hardware and software, and therefore, various embodiments of the present disclosure do not exclude a software perspective.

[0049] Hereinafter, the present disclosure relates to an apparatus and method for allocating and / or acquiring sidelink radio resources to support vehicle-to-everything (V2X) services in a wireless communication system using a direct communication protocol between terminals. Specifically, the present disclosure explains a technology that can meet the QoS levels required for various V2X services based on an operation process of a terminal that assists in configuring sidelink radio resources for sidelink direct communication between V2X terminals in a wireless communication system.

[0050] In the following description, for the sake of convenience, terms related to signals, terms related to channels, terms related to control information, terms related to network entities, terms related to device elements, etc. are illustratively used. Therefore, the present disclosure is not limited to the terms used below, and other terms related to subjects with equivalent technical meanings may be used.

[0051] In addition, for the convenience of description, the various embodiments of the present disclosure will be described using terms defined in a specific communication standard (e.g., the Third Generation Partnership Project (3GPP)). However, the various embodiments are only used as examples to explain the present disclosure, and the present disclosure can be easily modified and applied to other systems.

[0052] According to various embodiments of the present disclosure, an operation method of a terminal in a wireless communication system may include: determining service information requiring side link direct communication based on mode-2(d), determining terminal capabilities capable of assisting side link direct communication based on mode-2(d), notifying a base station or another terminal of the capabilities of an auxiliary terminal for side link direct communication based on mode-2(d), searching for a terminal assisting side link direct communication based on mode-2(d), obtaining auxiliary terminal information for side link direct communication based on mode-2(d), obtaining peripheral terminals requiring side link direct communication based on mode-2(d), and The invention relates to a method for transmitting the side link direct communication based on mode-2(d) to a neighboring terminal, ...

[0053] According to various embodiments of the present disclosure, a terminal device in a wireless communication system may include a transceiver, and at least one processor functionally coupled to the transceiver. When it is determined that the terminal is an auxiliary terminal for sidelink direct communication based on mode-2(d), the at least one processor may obtain information of another terminal that needs sidelink direct communication based on mode-2(d), request resource information required for sidelink direct communication of the other terminal from the base station, and obtain resource information for sidelink direct communication of the other terminal from the base station. When the terminal needs sidelink direct communication based on mode-2(d) and is not an auxiliary terminal for sidelink direct communication based on mode-2(d), the at least one processor may obtain auxiliary terminal information for sidelink direct communication based on mode-2(d), send information required for sidelink direct communication to the auxiliary terminal for sidelink direct communication based on mode-2(d), and obtain resource information required for sidelink direct communication through the auxiliary terminal.

[0054] The assisting terminal (assisting UE) may be used interchangeably with terms such as coordinating UE, scheduling UE, mode-2(d) UE, relay UE, etc.

[0055] Hereinafter, various embodiments of the present disclosure will be described in detail.

[0056] Figure 1 A wireless communication system according to various embodiments of the present disclosure is shown.

[0057] Figure 1 Base station 110, terminal 1 120, and terminal 2 130 are shown as a part of nodes using a wireless channel in a wireless communication system. Figure 1 Only one base station is shown, but another base station that is the same as or similar to base station 110 may also be included. Figure 1 Only two terminals are shown, but another terminal that is the same as or similar to terminal 1 120 and terminal 2 130 may also be included.

[0058] The base station 110 is a network infrastructure for providing radio access to the terminals 120 and 130. The base station 110 has a coverage area defined as a specific geographical area based on the distance over which a signal can be transmitted. The base station 110 may be referred to as an "access point (AP)", "eNodeB (eNB)", "fifth generation node (5G node)", "5GNodeB (gNB)", "radio point", "transmission / reception point (TRP)" or another term having an equivalent technical meaning other than a base station.

[0059] Each of the terminal 1 120 and the terminal 2 130 is a device used by a user, and performs communication with the base station 110 via a wireless channel. In some embodiments, at least one of the terminal 1 120 and the terminal 2 130 may operate without user participation. That is, at least one of the terminal 1 120 and the terminal 2 130 is a device for performing machine type communication (MTC) and may not be carried by a user. Each of the terminal 1 120 and the terminal 2 130 may be referred to as a "user equipment (UE)", "mobile station", "subscriber station", "remote terminal", "wireless terminal" or "user device" or another term having an equivalent technical meaning other than a terminal.

[0060] Base station 110, terminal 1 120 and terminal 2 130 can send and receive wireless signals in sub-6MHz bandwidth and millimeter wave (mmWave) bandwidth (e.g., 28GHz, 30GHz, 38GHz, 60GHz). In this case, in order to improve channel gain, base station 110, terminal 1 120 and terminal 2 130 can perform beamforming. Here, beamforming can include transmit beamforming and receive beamforming. That is, base station 110, terminal 1 120 and terminal 2 130 can give directionality to transmitted or received signals. To this end, base station 110, terminal 1 120 and terminal 2 130 can select service beams 112, 113, 121 and 131 via a beam search or beam management process. After the service beams 112 , 113 , 121 , and 131 are selected, subsequent communications may be performed via resources that are in a quasi co-located (QCL) relationship with resources through which the service beams 112 , 113 , 121 , and 131 are transmitted.

[0061] The first antenna port and the second antenna port may be evaluated to be in a QCL relationship if broad characteristics of a channel carrying symbols on the first antenna port can be inferred from a channel carrying symbols on the second antenna port. For example, the broad characteristics may include at least one of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial receiver parameters.

[0062] Figure 2 The configuration of a base station in a wireless communication system according to various embodiments of the present disclosure is shown.

[0063] Figure 2 The configuration shown may be understood as the configuration of the base station 110. The terms "··· component", "··· unit" and the like used below refer to a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.

[0064] refer to Figure 2 , the base station includes a wireless communicator 210, a backhaul communicator 220, a storage device 230 and a controller 240.

[0065] Wireless communicator 210 performs functions for transmitting and receiving signals via wireless channels. For example, wireless communicator 210 performs conversion between baseband signals and bit streams according to the physical layer standard of the system. For example, when transmitting data, wireless communicator 210 generates complex symbols by encoding and modulating the transmission bit stream. In addition, when receiving data, wireless communicator 210 recovers the reception bit stream by demodulating and decoding the baseband signal.

[0066] The wireless communicator 210 up-converts the baseband signal into a radio frequency (RF) band signal to transmit the signal through the antenna, and down-converts the RF band signal received through the antenna into a baseband signal. To this end, the wireless communicator 210 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), etc. The wireless communicator 210 may include multiple transmit and receive paths. In addition, the wireless communicator 210 may include at least one antenna array composed of multiple antenna elements.

[0067] In terms of hardware, wireless communicator 210 may be composed of a digital unit and an analog unit, and the analog unit may include a plurality of subunits according to operating power, operating frequency, etc. The digital unit may be implemented as at least one processor (eg, a digital signal processor (DSP)).

[0068] Wireless communicator 210 transmits and receives signals as described above. Therefore, all or part of wireless communicator 210 may be referred to as a "transmitter," "receiver," or "transceiver." In addition, in the following description, transmission and reception performed via a wireless channel are used to indicate that the process described above is performed by wireless communicator 210.

[0069] The backhaul communicator 220 provides an interface for performing communication with other nodes in the network. That is, the backhaul communicator 220 converts a bit stream sent from the base station to other nodes (e.g., another access node, another base station, an upper node, a core network, etc.) into a physical signal, and converts a physical signal received from other nodes into a bit stream.

[0070] The storage device 230 stores data such as basic programs, application programs, and configuration information for the operation of the base station. The storage device 230 may be composed of a volatile memory, a nonvolatile memory, or a combination of a volatile memory and a nonvolatile memory. The storage device 230 provides the stored data according to a request of the controller 240.

[0071] The controller 240 controls the overall operation of the base station. For example, the controller 240 sends and receives signals through the wireless communicator 210 or through the backhaul communicator 220. In addition, the controller 240 records data in the storage device 230 and reads out the data. The controller 240 may perform the functions of the protocol stack required by the communication standard. According to another embodiment, the protocol stack may be included in the wireless communicator 210. To this end, the controller 240 may include at least one processor.

[0072] According to various embodiments, the controller 240 may send radio resource control configuration information to the terminals 120 and 130. The controller 240 may send side link configuration information to the terminals 120 and 130. For example, the controller 240 may control the base station to perform operations according to various embodiments described below.

[0073] Figure 3 A configuration of a terminal in a wireless communication system according to various embodiments of the present disclosure is shown.

[0074] Figure 3 The configuration shown may be understood as the configuration of terminal 1 120 or terminal 2 130. The terms "···component", "···unit" and the like used below refer to a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.

[0075] refer to Figure 3 , the terminal includes a communicator 310, a storage device 320 and a controller 330.

[0076] The communicator 310 performs functions for sending and receiving signals via a wireless channel. For example, the communicator 310 performs a conversion function between a baseband signal and a bit stream according to the physical layer standard of the system. For example, when sending data, the communicator 310 generates complex symbols by encoding and modulating the transmission bit stream. In addition, when receiving data, the communicator 310 recovers the received bit stream by demodulating and decoding the baseband signal. The communicator 310 up-converts the baseband signal to an RF band signal to send a signal through an antenna, and down-converts the RF band signal received by the antenna to a baseband signal. For example, the communicator 310 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, etc.

[0077] The communicator 310 may include multiple transmit and receive paths. In addition, the communicator 310 may include at least one antenna array consisting of multiple antenna elements. In terms of hardware, the communicator 310 may be composed of digital circuits and analog circuits (e.g., radio frequency integrated circuits (RFIC)). Here, the digital circuits and analog circuits may be implemented in one package. In addition, the communicator 310 may include multiple RF chains. In addition, the communicator 310 may perform beamforming.

[0078] The communicator 310 may include different communication modules to process signals of different frequency bands. In addition, the communicator 310 may include multiple communication modules to support a variety of different radio access technologies. For example, different radio access technologies may include Bluetooth Low Energy (BLE), Wireless Fidelity (Wi-Fi), Wi-Fi Gigabyte (WiGig), cellular networks (e.g., Long Term Evolution (LTE)), etc. In addition, different frequency bands may include ultra-high frequency (SHF) (e.g., 2.5 GHz, 3.5 GHz, 5 GHz) bands and millimeter (mm) wave (e.g., 60 GHz) bands.

[0079] The communicator 310 transmits and receives signals as described above. Therefore, all or part of the communicator 310 may be referred to as a "transmitter", "receiver" or "transceiver". In addition, in the following description, transmission and reception performed via a wireless channel are used to indicate that the above-mentioned processing is performed by the communicator 310.

[0080] The storage device 320 stores data such as basic programs, application programs, and configuration information for the operation of the terminal. The storage device 320 may be composed of a volatile memory, a nonvolatile memory, or a combination of a volatile memory and a nonvolatile memory. The storage device 320 provides the stored data according to the request of the controller 330.

[0081] The controller 330 controls the overall operation of the terminal. For example, the controller 330 sends and receives signals through the communicator 310. In addition, the controller 330 records data in the storage device 320 and reads out data. The controller 330 can perform the functions of the protocol stack required by the communication standard. To this end, the controller 330 may include at least one processor or microprocessor, or may be a part of a processor. In addition, the communicator 310 and a part of the controller 330 may be referred to as a communication processor (CP).

[0082] According to various embodiments, the controller 330 may perform a process of determining that the terminals 120 and 130 activate a function of assisting another terminal in performing a radio resource configuration for performing a sidelink direct communication, a process of notifying another terminal and the base station 110 of a support capability for the function of assisting the radio resource configuration, a process of acquiring information of another terminal to acquire sidelink radio resource information using the radio resource configuration support function of the terminals 120 and 130, a process of providing the acquired information to the base station 110, a process of receiving the sidelink radio resource information of another terminal from the base station 110, and a process of transmitting the received sidelink radio resource information to another terminal. For example, the controller 330 may control the terminal to perform operations according to various embodiments described below.

[0083] FIG. 4A shows a configuration of a communicator in a wireless communication system according to various embodiments of the present disclosure, FIG. 4B shows a configuration of a communicator in a wireless communication system according to various embodiments, and FIG. 4C shows a configuration of a communicator in a wireless communication system according to various embodiments.

[0084] 4A to 4C show Figure 2 Wireless communicator 210 or Figure 3 4A to 4C show an example of a detailed configuration of the communicator 310. Figure 2 Wireless communicator 210 or Figure 3 A component of a portion of the communicator 310 for performing beamforming.

[0085] 4A , the wireless communicator 210 or the communicator 310 includes a coding and modulation unit 402 , a digital beamforming unit 404 , a plurality of transmission paths 406 - 1 to 406 -N, and an analog beamforming unit 408 .

[0086] The coding and modulation unit 402 performs channel coding. For channel coding, at least one of a low density parity check (LDPC) code, a convolutional code, and a polarization code is used. The coding and modulation unit 402 generates modulation symbols by performing constellation mapping.

[0087] The digital beamforming unit 404 performs beamforming on a digital signal (e.g., a modulation symbol). To this end, the digital beamforming unit 404 multiplies the modulation symbol by a beamforming weight. Here, the beamforming weight is used to change the amplitude and phase of the signal and may be referred to as a "precoding matrix", "precoder", etc. The digital beamforming unit 404 outputs the digital beamformed modulation symbols via a plurality of transmission paths 406-1 to 406-N. In this embodiment, according to a multiple-input multiple-output (MIMO) transmission scheme, the modulation symbols may be multiplexed or the same modulation symbol may be provided to a plurality of transmission paths 406-1 to 406-N.

[0088] Multiple transmission paths 406-1 to 406-N convert the digital signal of digital beamforming into an analog signal. To this end, each of the multiple transmission paths 406-1 to 406-N may include an inverse fast Fourier transform (IFFT) calculator, a cyclic prefix (CP) inserter, a DAC, and an up-converter. The CP inserter is used for an orthogonal frequency division multiplexing (OFDM) scheme and can be excluded when another physical layer scheme (e.g., filter bank multi-carrier (FBMC)) is applied. In other words, multiple transmission paths 406-1 to 406-N provide independent signal processing processes for multiple streams generated via digital beamforming. However, depending on the implementation, some components of the components of multiple transmission paths 406-1 to 406-N may be used in common.

[0089] The analog beamforming unit 408 performs beamforming on the analog signal. To this end, the digital beamforming unit 404 multiplies the analog signal by the beamforming weight. Here, the beamforming weight is used to change the amplitude and phase of the signal. Specifically, according to the connection structure between the multiple transmission paths 406-1 to 406-N and the antenna, the analog beamforming unit 408 can be configured as shown in Figure 4B or Figure 4C.

[0090] 4B, the signal input to the analog beamforming unit 408 is transmitted through the antenna through phase / amplitude conversion and amplification operations. At this time, the signal of each path is transmitted through a different antenna set (i.e., antenna array). Observing the processing of the signal input via the first path, the signal is converted into a signal sequence with different or same phase / amplitude by the phase / amplitude converters 412-1 to 412-1-M, amplified by the amplifiers 414-1 to 414-1-M, and then transmitted through the antenna.

[0091] Referring to FIG4C, the signal input to the analog beamforming unit 408 is transmitted through the antenna through phase / amplitude conversion and amplification operations. At this time, the signal of each path is transmitted through the same antenna set (i.e., antenna array). Observing the processing of the signal input through the first path, the signal is converted into a signal sequence with different or same phase / amplitude by the phase / amplitude converters 412-1-1 to 412-1-M and amplified by the amplifiers 414-1-1 to 414-1-M. The amplified signal is then summed by the summing units 416-1-1 to 416-1-M based on the antenna elements to be transmitted through an antenna array, and then transmitted through the antenna.

[0092] Fig. 4B shows an example of using an independent antenna array for each transmission path, and Fig. 4C shows an example of a transmission path sharing an antenna array. However, according to another embodiment, some transmission paths can use independent antenna arrays, and other transmission paths can share an antenna array. In addition, according to another embodiment, by applying a switchable structure between the transmission path and the antenna array, a structure that can be adaptively changed according to the situation can be used.

[0093] V2X services can be divided into basic safety services and advanced services. Basic safety services may include detailed services such as vehicle notification (CAM or BSM) service, left turn notification service, forward vehicle collision warning service, emergency vehicle entry notification service, forward obstacle warning service, intersection signal information service, and the like, and V2X information may be sent and received using broadcast or unicast or multicast transmission methods. Advanced services not only have enhanced QoS requirements than basic safety services, but also require a method for sending and receiving V2X information by using unicast and multicast transmission methods in addition to broadcast transmission methods, so as to send and receive V2X information within a specific vehicle group or between two vehicles. Advanced services may be detailed services such as cluster driving services, autonomous driving services, remote driving services, and extended sensor-based V2X services.

[0094] For V2X services, a terminal (UE) in an ng-RAN (gNB) connected to a 5G core network or an E-UTRAN (ng-eNB) connected to a 5G core network can perform V2X services via the ng-RAN or E-UTRAN. As another embodiment, when a base station (ng-RAN or ng-eNB) is connected to an evolved packet core network (EPC), V2X services can be performed through the base station. As another embodiment, when a base station is connected to an evolved packet core network, V2X services can be performed through the base station. At this time, the V2X wireless interface communication method that can be used for direct communication between terminals is at least one of unicast, multicast, and broadcast, and when V2X transmission and reception are performed in each communication method, a method for managing and configuring wireless communication parameters suitable for the QoS requirements of the V2X service can be provided.

[0095] A system for performing direct communication between terminals based on LTE wireless communication, which defines the parameters required for the transmitting terminal itself to select and operate the transmission. Based on LTE wireless communication, V2X service messages for basic safety are sent through a direct communication method between terminals. The QoS requirements for basic safety V2X services are not strict, and even if the basic safety services are diverse, the QoS requirements between services do not change, and the differentiation between services is not large. Therefore, even in a mode where the base station schedules radio resources for direct communication between terminals, based on LTE wireless communication, the base station does not need to obtain the QoS requirement information of the V2X service in detail, and schedules radio resources, and operates at the level of arbitrary management and configuration parameters of the terminal.

[0096] Advanced V2X services have various QoS requirements, and the level of QoS required for each V2X service varies greatly. In an embodiment of a specific advanced V2X service, radio resources and radio parameters for direct communication may be configured to meet the strict QoS requirements of the service before the service can operate. Therefore, a system based on direct communication between terminals supporting advanced V2X services can provide a method of guaranteeing the QoS of the service compared to a conventional system.

[0097] According to various embodiments of the present disclosure, a method of obtaining side link radio resource information for direct communication between vehicles required to perform a basic safety service or an advanced service will be described.

[0098] Figure 5 A shows a case where direct communication between terminals is performed by using a sidelink radio access technology (RAT) according to various embodiments of the present disclosure. Figure 5 B shows a case where direct communication between terminals is performed by using a sidelink radio access technology (RAT) according to various embodiments, Figure 5 C shows a case where direct communication between terminals is performed by using a sidelink radio access technology (RAT) according to various embodiments of the present disclosure. Figure 5 D shows a case where direct communication between terminals is performed by using a sidelink radio access technology (RAT) according to various embodiments of the present disclosure.

[0099] Figure 5 A shows a scenario where a terminal under the coverage of a gNB performs direct communication. Figure 5 In A, resource allocation configuration parameter information of the sidelink radio bearer for transmitting and receiving V2X packets based on unicast, broadcast or multicast between terminals may be sent to the terminals 120 and 130 via a system information message or an RRC dedicated message of the gNB 110, or may be pre-configured in the terminals 120 and 130. The terminals 120 and 130 performing direct communication may send sidelink resource allocation request information required for V2X service packet transmission to the gNB 110, and obtain sidelink resource allocation and / or configuration information from the gNB 110. The sidelink resource allocation request information for the sidelink resource allocation and / or configuration information may be sent via the terminal assisting in radio resource configuration.

[0100] Figure 5 B shows a scenario where terminals 120 and 130 perform direct communication under the coverage of ng-eNB. Figure 5In B, the configuration parameter information of the sidelink radio bearer for sending and receiving V2X packets based on unicast, multicast or broadcast between terminals may be sent to the terminals 120 and 130 via the system information message or RRC dedicated message of the ng-eNB 110, or may be pre-configured in the terminals 120 and 130. The terminals 120 and 130 performing direct communication may send the sidelink resource allocation request information required for V2X service packet transmission to the ng-eNB 110, and obtain the sidelink resource allocation and / or configuration information from the ng-eNB 110. The sidelink resource allocation request information for the sidelink resource allocation and / or configuration information may be sent via the terminal assisting in the radio resource configuration.

[0101] Figure 5 C shows a scenario where the terminal 120 under the coverage of the gNB and the terminal 130 under the coverage of the eNB perform direct communication. Figure 5 In C, the configuration parameter information of the sidelink radio bearer for transmitting and receiving the V2X packets based on unicast, groupcast or broadcast between the terminals may be transmitted to the terminals 120 and 130 via the system information message or RRC dedicated message of the gNB 110, or may be pre-configured in the terminals 120 and 130. The terminals 120 and 130 performing direct communication may transmit the sidelink resource allocation request information required for the V2X service packet transmission to the gNB 110, and obtain the sidelink resource allocation and / or configuration information from the gNB 110. The sidelink resource allocation request information for the sidelink resource allocation and / or configuration information may be transmitted via the terminal assisting the radio resource configuration.

[0102] Figure 5 D shows a scenario in which the terminals 120 and 130 perform direct communication under the coverage of the eNB. Configuration parameter information of the sidelink radio bearer for sending and receiving V2X packets based on unicast, groupcast or broadcast between the terminals may be sent to the terminals 120 and 130 via a system information message or an RRC dedicated message of the eNB 110, or may be pre-configured in the terminals 120 and 130. The terminals 120 and 130 performing direct communication may send sidelink resource allocation request information required for V2X service packet transmission to the eNB 110, and obtain sidelink resource allocation and / or configuration information from the eNB 110. The sidelink resource allocation request information for the sidelink resource allocation and / or configuration information may be sent via the terminal assisting in radio resource configuration.

[0103] According to various embodiments of the present disclosure, the side link radio resources sent by the terminal that assists in configuring the side link radio resources for direct communication between terminals can be used to send / receive V2X messages of a unicast method, send / receive V2X messages of a broadcast method, or send / receive V2X messages of a multicast method.

[0104] Next, a scenario in which the side link mode 2 (d) is operated in a side link resource allocation method required for direct communication between terminals will be described with reference to FIGS. 6A to 6C .

[0105] FIG6A illustrates a scenario of mode 2(d) of an operating side link resource allocation scheme according to various embodiments of the present disclosure. FIG6B illustrates a scenario of mode 2(d) of an operating side link resource allocation scheme according to various embodiments of the present disclosure. FIG6C illustrates a scenario of mode 2(d) of an operating side link resource allocation scheme according to various embodiments of the present disclosure.

[0106] For example, various embodiments of the present disclosure are described in an environment where the terminal is within the coverage of a base station and the terminal is in RRC connected mode, but can also be applied when the terminal is in RRC idle mode or RRC connection deactivation mode or out of coverage.

[0107] Sidelink mode-2(d) corresponds to a resource allocation method, which can obtain sidelink resource information of terminal A supporting direct communication between terminals through terminal B supporting direct communication between terminals. The resource information may correspond to a resource pool or resource allocation configuration information required for terminal A to request a sidelink resource from a base station, and the resource information is allocated from the base station. The resource information may correspond to a resource pool or resource allocation configuration information required for terminal A to directly select a sidelink resource. The resource information may correspond to a sidelink resource allocated by the base station.

[0108] When receiving a resource pool or resource allocation configuration information, terminal A may perform a process for receiving a side link resource to be actually used by the base station, and terminal A may perform direct communication with another terminal based on the allocated resources. When receiving a resource pool or resource allocation configuration information, terminal A may select resources by itself (e.g., based on sensing or random selection), and perform direct communication with another terminal on the selected resources. Information indicating whether terminal A uses a mode for allocating side link resources from a base station or a mode for allocating side link resources by itself may be included in the resource pool or resource allocation configuration information received by terminal B. Terminal B may correspond to an auxiliary terminal that performs an operation for obtaining resource information from a base station for terminal A. Terminal A may be referred to as a target terminal.

[0109] FIG6A shows an embodiment of a convoy. A convoy may be an embodiment of static group communication of the present disclosure. A convoy according to various embodiments of the present disclosure may be performed by vehicle terminals by forming a group to perform direct communication between terminals. The group may include a leader terminal 600 and a member terminal 610. When a group leader terminal 600 and a member terminal 610 are within the coverage of a base station 620, the group leader terminal 600 and the member terminal 610 may obtain side link radio configuration information for performing direct communication between terminals in the group from the base station 620.

[0110] According to an embodiment of the present disclosure, the group leader terminal 600 may act as an auxiliary terminal for acquiring side link resource information from the base station 620 for the member terminal 610. The member terminal 610 may transmit and receive data using the side link radio resources allocated by the base station 620 based on the side link resource information received through the group leader terminal 600, transmit and receive data through the allocated resources by performing a process of allocating side link radio resources with the base station 620, or transmit and receive data through the allocated resources by selecting the side link radio resources by itself. The base station 620 may perform a configuration information exchange process with the group leader terminal 600 to configure the side link radio resource information to be used by the member terminal 610.

[0111] Referring to FIG6B , an embodiment of group communication performed by vehicles, infrastructure, pedestrian terminals, etc. in an intersection area is shown. Intersection group communication may be an embodiment of dynamic group communication. According to various embodiments of the present disclosure, vehicle terminals, pedestrian terminals, and infrastructure terminals may form a group to perform direct communication between terminals. The group may include a leader terminal 640 and a member terminal 650. In an embodiment of the present disclosure, the infrastructure terminal installed at the intersection may be a group leader terminal 640, and the vehicle terminal and pedestrian terminal located at the intersection may be a member terminal 650. When the group leader terminal 640 and the member terminal 650 are within the coverage of the base station 620, the group leader terminal 640 and the member terminal 650 may obtain side link radio configuration information for performing direct communication between terminals in the group from the base station 620.

[0112] According to an embodiment of the present disclosure, the group leader terminal 640 may be used as an auxiliary terminal for the member terminal 650 to acquire the side link resource information from the base station 620. The member terminal 650 may transmit and receive data using the side link radio resources allocated by the base station 620 based on the side link resource information received through the group leader terminal 640, transmit and receive data through the allocated resources by performing a process of allocating side link radio resources with the base station 620, or transmit and receive data through the allocated resources by selecting the side link radio resources by itself. The base station 620 may perform a configuration information exchange process with the group leader terminal 640 to configure the side link radio resource information to be used by the member terminal 650.

[0113] Referring to FIG. 6C , a configuration for acquiring sidelink radio resource information between a base station 620, UE1 660, and UE2 670 according to various embodiments of the present disclosure is shown. The base station 620, UE1 660, and UE2 670 may exchange control signals and data via Uu interfaces 682 and 684, respectively. UE1 660 and UE2 670 may exchange control signals and data via a sidelink interface 680. According to an embodiment of the present disclosure, UE1 660 may perform a function of assisting UE2 670 in sidelink radio resource configuration. UE1 660 may request the sidelink radio resource configuration information of UE2 670 from the base station 620, and obtain the sidelink radio resource configuration information of UE2 670 from the base station 620 to send it to UE2 670.

[0114] According to various embodiments of the present disclosure, a terminal supporting the sidelink radio resource configuration auxiliary terminal function (hereinafter referred to as an auxiliary terminal) may be specified in advance by a V2X server or a V2X administrator. For example, the fleet leader terminal 600 of FIG. 6A or the infrastructure terminal 640 installed at the intersection of FIG. 6B may be configured to have the function of an auxiliary terminal.

[0115] According to an embodiment of the present disclosure, the terminal may determine whether the mode-2(d) side link wireless communication is configured. For example, in at least one of the following cases, the terminal may determine that the mode-2(d) side link wireless communication is established: if the terminal is located in a mode-2(d) enabling zone, if an application related to the mode-2(d) side link wireless communication is run, and if resource information of the mode-2(d) side link wireless communication is received from the base station.

[0116] An embodiment of the condition for activating the auxiliary terminal function may be that it is always activated when the V2X function is activated. For example, by satisfying the above conditions, it is determined that mode-2 (d) sidelink wireless communication is configured for the terminal. Therefore, when the V2X function is activated, the auxiliary terminal function of the terminal may be activated.

[0117] Other embodiments of the conditions for activating the auxiliary terminal function may include at least one of the following: (1) when located in a mode-2(d) enabled area; (2) when a mode-2(d) V2X application of interest is running; and (3) when conditions (1) and (2) are both met. The mode-2(d) enabled area information may be indicated by at least one of information previously configured in a V2X server, a base station, and a terminal.

[0118] According to an embodiment, the enabling area configuration information may be transmitted to the terminal and pre-configured via NW configuration (RRC dedicated or system information).

[0119] As another embodiment, the enabling area may be configured to be activated for a SL bearer, a SL flow, or a SL application.

[0120] In the case of a specific SL bearer, the enabling region can be operated. In addition, the enabling region configuration information can be included in the SL bearer configuration information.

[0121] In the operation of the terminal processing SL bearer configuration and enabling area configuration, when the configuration is obtained, the terminal activates the auxiliary terminal function for the corresponding SL bearer. For example, when the configuration is obtained, the terminal can activate the mode-2(d) function for the corresponding SL bearer.

[0122] At the same time, the enabling area can be operated for a specific SL flow. For example, the enabling area configuration information can be included in the SL flow configuration information. In the operation of the terminal processing the SL configuration and the enabling area configuration, when the configuration is obtained, the terminal activates the auxiliary terminal function for the corresponding SL flow, for example, when the configuration is obtained, the terminal can activate the mode-2 (d) function for the corresponding SL flow.

[0123] Alternatively, the enabled region may operate for a specific application.

[0124] The application and enabling area configuration mapping information may be transmitted to the AS layer in the upper layer (V2X layer or upper layer) of the terminal. The auxiliary terminal function activation for the application is shown in the example of Table 1, and the auxiliary terminal function activation configuration information based on Table 1 may be transmitted to the AS layer. In the operation of the terminal processing the SL configuration and the enabling area configuration, when the configuration is obtained, the terminal activates the auxiliary terminal function for the corresponding SL application, for example, when the configuration is obtained, the terminal activates the mode-2 (d) function for the corresponding SL application. An example of information indicating the SL application in the AS layer may include at least one of a destination identifier or a source identifier corresponding to the SL application.

[0125] The mode-2(d) enabled area may be, for example, the convoy of FIG. 6A or the intersection of FIG. 6B. The mode-2(d) enabled area may be operated when the convoy is running (e.g., from departure to arrival). The mode-2(d) enabled area may be operated for the intersection of a specific area. When the auxiliary terminal is located in the mode-2(d) enabled area, the auxiliary terminal may activate the auxiliary terminal function.

[0126] The V2X applications of interest for Mode-2(d) may be indicated by the V2X server or pre-configured in the terminal. Table 1 shows a list of applications corresponding to Mode-2(d) interest.

[0127] [Table 1] Application List and Mode-2(d) Interest

[0128]

[0129] The determination of V2X applications interested in mode-2(d) may be performed in the upper layer of the auxiliary terminal. According to the example of Table 1, the terminal may determine that it is not necessary to support mode-2(d) for the grouping of App_A, and the auxiliary terminal function may not be activated. The terminal may determine that the grouping of App_B to App_C may support mode-2(d) and activate the auxiliary terminal function.

[0130] According to various embodiments of the present disclosure, a terminal (hereinafter referred to as a target terminal) that supports the function of receiving side link radio resource configuration can be pre-specified by a V2X server or a V2X administrator. For example, the fleet member terminal 610 of FIG. 6A or the vehicle terminal or pedestrian terminal 650 located at the intersection of FIG. 6B can be configured to have the function of a target terminal. According to an embodiment of the present disclosure, when the V2X function is activated, the target terminal function can be activated together. Other embodiments of the conditions under which the target terminal function is activated may include at least one of the following: (1) when located in a mode-2 (d) enabled area; (2) when a mode-2 (d) V2X application of interest is running; and (3) when conditions (1) and (2) are both met. The mode-2 (d) enabled area can be, for example, the fleet of FIG. 6A or the intersection of FIG. 6B. When located in a mode-2 (d) enabled area, the target terminal can activate the target terminal function. The mode-2(d) V2X application of interest for activating the target terminal function may be indicated by the V2X server or pre-configured in the terminal, as shown in Table 1. The upper layer of the target terminal may refer to Table 1 to determine the mode-2(d) V2X application of interest.

[0131] The method for determining whether an auxiliary terminal or a target terminal is located in a mode-2(d) enabled area may include at least one of the following or a combination of the following: (1) determining by comparing the location coordinates of the terminal based on GNSS or GPS mode-2(d) enabled area information indicated by a base station or set in the terminal; (2) a mode-2(d) enabled area indicator sent by a base station; and (3) a mode-2(d) enabled area indicator sent by an auxiliary terminal.

[0132] The area configuration information that the assisting terminal or the target terminal can use to determine the mode-2(d) enabled area may include the content shown in the following Table 2. For example, the terminal may receive the area configuration information shown in the following Table 2 from the base station.

[0133] [Table 2] Area configuration information

[0134]

[0135] The auxiliary terminal or the target terminal may calculate the area ID as follows based on the area configuration information shown in Table 3 below.

[0136] [Table 3] Area ID

[0137]

[0138] As an example, the target terminal may determine whether the area ID of the terminal is included in the mode-2(d) area ID list transmitted by the base station to determine whether there is a mode-2(d) enabled area.

[0139] As an example, the target terminal may determine whether the area ID is a mode-2(d) enabled area by determining whether the area ID of the target terminal is included in a mode-2(d) area ID list transmitted by the base station or the secondary terminal.

[0140] As another embodiment, the auxiliary terminal may determine whether the area ID is a mode-2(d) enabled area by determining whether a mode-2(d) enabled area indicator is included in signaling transmitted by the base station.

[0141] As another embodiment, the target terminal may determine whether the area ID is a mode-2(d) enabled area by determining whether a mode-2(d) enabled area indicator is included in signaling transmitted by the base station or the secondary terminal.

[0142] As another embodiment, the auxiliary terminal may determine whether the area ID is a mode-2(d) enabled area by determining whether the mode-2(d) enabled area indicator is configured as enabled or disabled in signaling transmitted by the base station.

[0143] As another embodiment, the target terminal may determine whether the area ID is a mode-2(d) enabled area by determining whether a mode-2(d) enabled area indicator is configured as enabled or disabled in signaling sent by the base station or the secondary terminal.

[0144] According to various embodiments, when the mode-2(d) function is activated, the auxiliary terminal 660 may transmit capability information about the mode-2(d) function to the base station 620 through the Uu interface 682 .

[0145] When the base station 620 does not transmit the mode-2(d) enabled area indicator, the base station 620 may transmit the mode-2(d) enabled area indicator when the base station 620 determines that there is an auxiliary terminal 660 capable of the mode-2(d) function. When the mode-2(d) function is activated, the auxiliary terminal 660 may transmit the mode-2(d) function indication information and / or the mode-2(d) enabled area indicator to the target terminal 670 via the side link interface 680. An embodiment of the transmission and reception process of the mode-2(d) function indication information and / or the mode-2(d) enabled area indicator through the side link interface 680 will be described with reference to FIGS. 8A to 8C. When the mode-2(d) function is activated, the auxiliary terminal 660 may determine whether to establish a PC5 RRC unicast connection with the target terminal 670, and if the target terminal 670 and the PC5 RRC unicast connection are not established, the auxiliary terminal 660 may perform a PC5 RRC unicast connection configuration process.

[0146] According to various embodiments of the present disclosure, when the mode-2(d) function is activated, the target terminal 670 may send capability information about the mode-2(d) function to the base station 620 through the Uu interface 684. The upper layer (e.g., V2X layer, application layer) of the target terminal 670 may instruct the AS layer to activate the mode-2(d) function. When the mode-2(d) function is activated, the target terminal 670 may determine whether to establish a PC5 RRC unicast connection with the auxiliary terminal 660, and when the auxiliary terminal 660 and the PC5 RRC unicast connection are not established, the target terminal 670 may perform a PC5 RRC unicast connection configuration process.

[0147] Figure 7A illustrates the operation of a terminal triggering side link mode-2(d) according to various embodiments of the present disclosure. Figure 7B illustrates the operation of a terminal triggering side link mode-2(d) according to various embodiments of the present disclosure.

[0148] 7A , in operation 701 , the terminal may determine whether an auxiliary terminal function is activated. When at least one or a combination of the following Table 4 is satisfied, the auxiliary terminal function activation may be performed.

[0149] [Table 4] Auxiliary terminal functions

[0150]

[0151] Meanwhile, according to an embodiment of the present disclosure, before determining whether to activate the auxiliary terminal function, the terminal may determine whether to configure mode-2(d) sidelink wireless communication based on at least one predetermined condition.

[0152] If the auxiliary terminal function is activated by the determination in operation 701, the terminal may notify the base station of the mode-2 (d) support capability and / or the mode-2 (d) auxiliary terminal function capability in operation 702. When the base station does not need to know the mode-2 (d) auxiliary terminal function capability and / or when the terminal is not in an RRC connection activation state with the base station, operation 702 may be omitted.

[0153] In operation 703, the terminal may transmit mode-2(d) function indication information to the base station. The mode-2(d) indicator of operation 703 may include a mode-2(d) enabled area indicator.

[0154] In operation 704, the terminal may search for the presence of a target terminal of mode-2 (d). The search process for the target terminal may correspond to a search process using a PC5-S signaling message. The PC5-S signaling message sent by the terminal during the search process corresponds to, for example, a search message, and may include a destination identifier of the target terminal, an indicator for inquiring whether the target terminal exists, and at least one of a group identifier when the target terminal corresponds to a specific group. The terminal may receive a PC5-S signaling message (search response message) from one or more target terminals as a response to the PC5-S signaling including the information. The search response message may include at least one of an identifier of the terminal, an identifier of the target terminal, and a group identifier when the target terminal corresponds to a specific group.

[0155] In operation 704, the terminal may search for the presence of a mode-2(d) target terminal. In operation 704, if a mode-2(d) target terminal is found and there is no PC5 RRC unicast connection configuration with the target terminal, a PC5 RRC unicast connection configuration process with the target terminal may be performed.

[0156] In operation 705, the terminal may collect mode-2(d) information from the target terminal. The mode-2(d) information collection in operation 705 may be performed through a PC5 RRC unicast connection. The mode-2(d) information may include information about a V2X application for allocating / configuring sidelink radio resources to the target terminal (at least one of an interest transmission frequency list, an interest reception frequency list, a unicast destination ID, a multicast destination ID, a QFI, a PQI, service mode information, and a buffer status information).

[0157] If the auxiliary terminal function is not activated through the determination of operation 701, the terminal may activate the target terminal function. When at least one of the following Table 5 or a combination thereof is satisfied, the target terminal function activation may be performed.

[0158] [Table 5] Target terminal function activation

[0159]

[0160] On the other hand, the search for the auxiliary terminal may use a search process using the PC5-S signaling message of the above-mentioned operation 704. As another embodiment, as a search process using the PC5-S signaling message, the terminal may send a PC5-S signaling message for searching, and the signaling may include at least one of a destination identifier of the target terminal, an indicator for inquiring whether the target terminal exists, an indicator indicating whether the target terminal exists, and a group identifier when the target terminal corresponds to a specific group. The terminal may receive a PC5-S signaling message corresponding to an auxiliary terminal search response message from one or more auxiliary terminals, and the auxiliary terminal search response message may include at least one of an identifier of the terminal, an identifier of the target terminal, and a group identifier when the target terminal corresponds to a specific group.

[0161] In operation 706, the terminal may notify the base station of the mode-2(d) support capability and / or the mode-2(d) target terminal functional capability. When the base station does not need to know the mode-2(d) target terminal functional capability and / or when the terminal is not in an RRC connection activation state with the base station, operation 706 may be omitted.

[0162] In operation 707, the terminal may search for the auxiliary terminal. The presence or absence of the auxiliary terminal may be determined by receiving the mode-2(d) function indication information and / or the mode-2(d) enabled area indicator sent from the auxiliary terminal. If the PC5 RRC unicast connection is not established with the auxiliary terminal, the terminal may perform a PC5 RRC unicast connection establishment procedure with the auxiliary terminal.

[0163] According to an embodiment, when one or more auxiliary terminals are searched, the terminal may select an auxiliary terminal. For example, the terminal may establish PC5 RRC with all the auxiliary terminals searched. As another example, the terminal may arbitrarily select an auxiliary terminal from all the auxiliary terminals searched and connect to PC5 RRC. In another example, the terminal may select an auxiliary terminal with the best signal strength (e.g., SL RSRP), may select an auxiliary terminal with the best signal strength (e.g., UuRSRP+SL RSRP), or may select an auxiliary terminal with the best battery level (e.g., battery remaining).

[0164] If there is no PC5 RRC unicast connection configuration with the auxiliary terminal, the terminal may perform a PC5 RRC unicast connection configuration procedure with the auxiliary terminal.

[0165] In operation 708, the terminal may transmit mode-2(d) assistance information to the auxiliary terminal. The mode-2(d) assistance information may include at least one of an interest transmission frequency list, an interest reception frequency list, a unicast destination ID, a multicast destination ID, a QFI, a PQI, traffic mode information, and buffer status information.

[0166] 7B , the terminal may determine whether the auxiliary terminal function is activated in operation 711. When at least one of the above Table 2 or a combination thereof is satisfied, the auxiliary terminal function activation may be performed.

[0167] If the auxiliary terminal function is activated by the determination of operation 711, the terminal may notify the base station of the mode-2 (d) support capability and / or the mode-2 (d) auxiliary terminal function capability in operation 712. When the base station does not need to know the mode-2 (d) auxiliary terminal function capability and / or when the terminal is not in an RRC connection activation state with the base station, operation 712 may be omitted.

[0168] In operation 713, the terminal may transmit mode-2(d) function indication information to the base station. The mode-2(d) function indication information of operation 713 may include a mode-2(d) enabled area indicator.

[0169] In operation 714, the terminal may search for the presence of a target terminal of mode-2 (d). The search process for the target terminal may correspond to a search process using a PC5-S signaling message. The PC5-S signaling message sent by the terminal during the search process corresponds to, for example, a search message, and may include a destination identifier of the target terminal, an indicator for inquiring whether the target terminal exists, and at least one of a group identifier when the target terminal corresponds to a specific group. The terminal may receive a PC5-S signaling message (search response message) from one or more target terminals as a response to the PC5-S signaling including the information. The search response message may include an identifier of the terminal, an identifier of the target terminal, and at least one of a group identifier when the target terminal corresponds to a specific group.

[0170] In operation 714, the terminal may search for the presence of a target terminal of mode-2(d). In operation 714, if a target terminal of mode-2(d) is found and there is no PC5 RRC unicast connection configuration with the target terminal, the terminal may perform a PC5 RRC unicast connection configuration process with the target terminal.

[0171] In operation 715, the terminal may collect mode-2(d) information from the target terminal. The mode-2(d) information collection in operation 715 may be performed through a PC5 RRC unicast connection. The mode-2(d) information may include information about a V2X application for allocating / setting sidelink radio resources to the target terminal (at least one of an interest transmission frequency list, an interest reception frequency list, a unicast destination ID, a multicast destination ID, a QFI, a PQI, service mode information, and a buffer status information).

[0172] If the auxiliary terminal function is not activated through the determination of operation 711, the terminal may determine whether the target terminal function is activated. When at least one of the above Table 5 or a combination thereof is satisfied, the target terminal function activation may be performed.

[0173] In operation 717, the terminal may notify the base station of the mode-2(d) support capability and / or the mode-2(d) target terminal functional capability. When the base station does not need to know the mode-2(d) target terminal functional capability and / or when the terminal is not in an RRC connection activation state with the base station, operation 717 may be omitted.

[0174] In operation 718, the terminal may search for the auxiliary terminal. The presence or absence of the auxiliary terminal may be determined by receiving a mode-2(d) indicator and / or a mode-2(d) enabled area indicator sent by the auxiliary terminal. Meanwhile, the search for the auxiliary terminal may use the search process using the PC5-S signaling message of the above-mentioned operation 714. In another embodiment, as a search process using the PC5-S signaling message, the terminal may send a PC5-S signaling message for searching for the auxiliary terminal, and the signaling may include at least one of a destination identifier of the auxiliary terminal, an indicator for inquiring whether the auxiliary terminal exists, an indicator for indicating whether the target terminal exists, or a group identifier when the target terminal corresponds to a specific group.

[0175] The terminal may receive a PC5-S signaling message corresponding to an auxiliary terminal search response message from one or more auxiliary terminals, and the auxiliary terminal search response message may include at least one of a target terminal identifier, an auxiliary terminal identifier, and an identifier of a group to which the target terminal belongs. If there is no PC5 RRC unicast connection configuration with the auxiliary terminal, the terminal may perform a PC5 RRC unicast connection configuration process with the auxiliary terminal.

[0176] In operation 719, the terminal may send mode-2 (d) auxiliary information to the auxiliary terminal. The mode-2 (d) auxiliary information may include at least one of a list of transmission frequencies of interest, a list of reception frequencies of interest, a unicast destination ID, a multicast destination ID, a QFI, a PQI, business mode information, and buffer status information. According to an embodiment, when one or more auxiliary terminals are searched, the terminal may select an auxiliary terminal. For example, the terminal may establish a PC5 RRC with all searched auxiliary terminals. As another example, the terminal may arbitrarily select an auxiliary terminal from all searched auxiliary terminals and connect the PC5RRC. For another example, the terminal may select an auxiliary terminal with the best signal strength (e.g., SL RSRP), may select an auxiliary terminal with the best signal strength (e.g., Uu RSRP+SL RSRP), or may select an auxiliary terminal with the best battery level (e.g., battery remaining).

[0177] In the process of performing operations 701 to 711 of FIG. 7A to FIG. 7B according to another embodiment of the present disclosure, if it is determined that a terminal supporting the auxiliary terminal function is already nearby in the case of supporting the auxiliary terminal function among the conditions of the above Table 4, the terminal may proceed to operations 706 to 716 of FIG. 7A to FIG. 7B without activating the auxiliary terminal function. The method for determining that a terminal supporting the auxiliary terminal function is already nearby may include determining, by the terminal, that a terminal supporting the auxiliary terminal function already exists through a mode-2(d) indicator and / or a mode-2(d) enabled area indicator received from the auxiliary terminal.

[0178] Figure 8A shows the signal process for notifying the capability information of the terminal supporting side link mode-2(d) according to various embodiments, Figure 8B shows the signal process for notifying the capability information of the terminal supporting side link mode-2(d) according to various embodiments, and Figure 8C shows the signal process for notifying the capability information of the terminal supporting side link mode-2(d) according to various embodiments.

[0179] 8A , if the terminal 800 receives the UE capability query message of operation 801 from the base station 810, the terminal 800 has an RRC connection configuration with the base station 810. In operation 802, the terminal 800 may send the sidelink mode-2 (d) function support capability to the base station 810 through a UE capability information message. The sidelink mode-2 (d) capability support capability information included in the UE capability information message may include at least one of mode-2 (d) capability indication information, mode-2 (d) auxiliary terminal information, and mode-2 (d) target terminal information.

[0180] According to another embodiment of the present disclosure, a UE capability information message including sidelink mode-2 (d) capability support capability information may be transmitted without receiving the UE capability query message of operation 801 .

[0181] 8B, when the terminal 800 has an RRC connection configuration with the base station 810, in operation 811, the terminal 800 may send a sidelink mode-2 (d) function support capability to the base station 810 via at least one of a SidelinkUEinformation message, a UEAssistanceInformation message, or an SLMode2dAssistanceInformation message. The sidelink mode-2 (d) function support capability information may include at least one of mode-2 (d) function indication information, mode-2 (d) auxiliary terminal information, mode-2 (d) target terminal information, and mode-2 (d) auxiliary information. When the auxiliary terminal sends the sidelink mode-2 (d) function support capability information to the base station, the mode-2 (d) auxiliary information may be included, and when the target terminal sends the sidelink mode-2 (d) function support capability information to the base station, the mode-2 (d) auxiliary information may not be included.

[0182] The mode-2(d) assistance information may include at least one of a list of transmission frequencies of interest, a list of reception frequencies of interest, a unicast destination ID, a multicast destination ID, a QFI, a PQI, service mode information, and buffer status information. The terminal 800 may send only the mode-2(d) assistance information to the base station 810 in at least one of a SidelinkUEInformation message, a UEAssistanceInformation message, or a SLMode2dAssistanceInformation message, and when the base station 810 receives the mode-2(d) assistance information, the base station 810 may recognize that the terminal 800 is an auxiliary terminal with mode-2(d) functional capabilities.

[0183] The processes of Figures 8A to 8B may correspond to operations 702 to 712 of Figure 7A for exchanging capability information between an assisting terminal and a base station. The processes of Figures 8A to 8B may correspond to operations 706 to 717 of Figure 7A for exchanging capability information between a target terminal and a base station.

[0184] 8C, when UE1 800 activates the auxiliary terminal function, in operation 821, UE1 800 may send mode-2 (d) function indication information and / or mode-2 (d) enabled area indicator information to UE2 860. The information of operation 821 may be sent via at least one of a PC5-RRC unicast control signal, a PC5-RRC multicast control signal, and a PC5-RRC broadcast control signal. The control signal may be sent via at least one of an AS configuration message, a UE capability message, a SL V2X MIB, a SL V2X SIB, a PSCCH SCI, and a PC5 MAC CE. As another embodiment of the present disclosure, the information of operation 821 may be included in a V2X application message to be sent. UE2 860, which receives the information sent by UE1 800 in operation 821, may identify the mode-2 (d) enabled area and / or identify that UE1 800 is an auxiliary terminal supporting the mode-2 (d) function in operation 822.

[0185] 9A to 9E , a process in which UE1 800 performs the role of an auxiliary terminal for supporting the mode-2(d) function of UE2 860 will be described. In addition, when UE2 860 activates the mode-2(d) function in operation 822, UE2 860 may notify UE1 800 of a mode-2(d) function support notification and / or a mode-2(d) function interest. The process will be described with reference to FIGS. 9B to 9E .

[0186] FIG. 9A illustrates a signaling process for obtaining information required for side link resource allocation according to various embodiments of the present disclosure. FIG. 9B illustrates a signaling process for obtaining information required for side link resource allocation according to various embodiments of the present disclosure. FIG. 9C illustrates a signaling process for obtaining information required for side link resource allocation according to various embodiments of the present disclosure. FIG. 9D illustrates a signaling process for obtaining information required for side link resource allocation according to various embodiments of the present disclosure. FIG. 9E illustrates a signaling process for obtaining information required for side link resource allocation according to various embodiments.

[0187] 9A , when UE2 900 activates the mode-2(d) function, in operation 901, UE2 900 may notify UE1 960 of the mode-2(d) function support notification and / or the mode-2 function interest. The operation of operation 901 may be performed when UE2 900 receives the mode-2(d) function support notification and / or the mode-2(d) function interest notification from UE1 960 according to at least one of the processes of FIG. 9B to FIG. 9E , and determines the role of the terminal in which UE1 960 performs auxiliary sidelink radio resource allocation and / or configuration. The SL mode-2(d) information message sent in operation 901 may be sent via a PC5 RRC unicast connection between UE1 960 and UE2 900.

[0188] The information included in the SL Mode-2(d) information message may include at least one of the following: a destination ID (DST ID) corresponding to an application; a cast type indicator when the DST ID is not classified by cast type; frequency of interest information corresponding to the DST ID; PQI information; service mode information (packet transmission period, packet size, priority information, packet transmission offset) when a configured grant type of sidelink radio resource allocation is required; a terminal identifier (e.g., V2X-RNTI); and serving cell information (when it is necessary to distinguish a terminal received from another base station).

[0189] According to various embodiments of the present disclosure, an example of an ASN.1 structure in the case of including a propagation type indicator for distinguishing a propagation type corresponding to a DST ID is shown in Table 6 below.

[0190] [Table 6] ASN.1 structure of the propagation type indicator

[0191]

[0192] Upon receiving the information of operation 901, UE1 960 may configure mode-2(d) assistance information based on the information included in the SL Mode 2d Information message and transmit the information to the base station 990. The mode-2(d) assistance information may include information of one or more target terminals for which UE1 960 assists the mode-2(d) function in addition to UE2 900.

[0193] The mode-2(d) assistance information transmitted in operation 902 may include at least one of an interest transmission frequency list, an interest reception frequency list, a unicast destination ID, a multicast destination ID, a QFI, a PQI, traffic mode information, and buffer status information. UE1 960 may include the mode-2(d) assistance information in at least one of a SidelinkUEInformation message, a UEAssistanceInformation message, or a SLMode2dAssistanceInformation message to the base station 990.

[0194] 9B , in operation 911, UE1 960 may send an AS configuration message including mode-2(d) function indication information and / or mode-2(d) enabled area indicator to UE2 900. In operation 912, UE2 900 may send an SL mode 2d information message including mode-2(d) function assistance notification and / or mode-2(d) function interest information to UE1 960.

[0195] 9C , in operation 921, UE1 960 may send a UE capability message including mode-2(d) function indication information and / or mode-2(d) enabled area indicator to UE2 900. In operation 922, UE2 900 may send a SL mode 2d information message including mode-2(d) function assistance notification and / or mode-2(d) function interest information to UE1 960.

[0196] 9D , in operation 931, UE1 960 may send a MIB-SLV2X message including mode-2(d) function indication information and / or mode-2(d) enabled area indicator to UE2 900. In operation 932, UE2 900 may send a SL mode 2d information message including mode-2(d) function assistance notification and / or mode-2(d) function interest information to UE1 960.

[0197] 9E , in operation 941, UE1 960 may send a V2X application message including mode-2(d) function indication information and / or mode-2(d) enabled area indicator to UE2 900. In operation 942, UE2 900 may send a SL mode 2d information message including mode-2(d) function assistance notification and / or mode-2(d) function interest information to UE1 960.

[0198] Figure 10A shows a signaling process for configuring sidelink resource allocation information according to various embodiments of the present disclosure. Figure 10B shows a signaling process for configuring sidelink resource allocation information according to various embodiments of the present disclosure.

[0199] 10A , in operation 1001, the base station 1080 may configure sidelink radio resource allocation and / or configuration of one or more target terminals 1060 based on the mode-2(d) assistance information of the target terminal 1060 collected by the assistance terminal 1000. The mode-2(d) assistance information collected by the assistance terminal 1000 may include the information transmitted in operation 902 of FIG. 9A .

[0200] In operation 1002, the base station 1080 may provide the configured sidelink radio resource allocation and / or configuration information of the one or more target terminals 1060 to the one or more target terminals 1060 through the auxiliary terminal 1000. The sidelink radio resource allocation and / or configuration information is a sidelink radio resource allocated to the target terminal 1060 or resource configuration information to be used by the target terminal 1060 to request the sidelink radio resource from the base station 1080, and may include at least one of resource configuration information used by the target terminal 1060 to directly allocate the sidelink radio resource. The detailed process of FIG. 10A will be described with reference to FIG. 10B.

[0201] 10B , in operation 1011, the base station 1080 may transmit an RRC reconfiguration message including sidelink radio resource allocation and / or configuration information for one or more target terminals 1060 to the auxiliary terminal 1000. The information transmitted in operation 1011 may include at least one of a destination ID list, sidelink radio resource pool information, sidelink radio resource allocation information, configuration information required for a sidelink radio resource request, mode 1 allocation and / or mode 2 allocation information, and sidelink feedback transmission resource configuration information for providing each target terminal 1060 with radio resource allocation and / or configuration information.

[0202] The mode 1 allocation information may include at least one of configuring grant type 1 to configuring grant type 2 to dynamic grant. The mode 2 allocation information may include at least one of a sidelink radio resource pool and a sidelink radio resource sensing configuration information. In response to the RRC configuration message, in operation 1012, the auxiliary terminal 1000 may send an RRC configuration complete message to the base station 1080. In operation 1013, the auxiliary terminal 1000 may send an SL mode 2d configuration message including the sidelink radio resource allocation and / or configuration information of one or more target terminals 1060 received in the RRC configuration message to the target terminal 1060. In response to the SL mode 2d configuration message, in operation 1014, the one or more target terminals 1060 may send an SL mode 2d configuration complete message to the auxiliary terminal 1000. The one or more target terminals 1060 may perform sidelink radio resource allocation based on the sidelink radio resource allocation and / or configuration information received in operation 1015.

[0203] When one or more target terminals 1060 are allocated side link resources (which may include packet transmission resources and HARQ feedback resources) from the base station 1080, V2X packet transmission and reception may be performed using the obtained resources. When one or more target terminals 1060 receive mode 1 resource configuration information from the base station 1080, that is, if the resource configuration information corresponds to a case where an SR configuration or a configuration required for SL-BSR transmission is received, a side link radio resource may be allocated to the target terminal 1060 based on the resource configuration information to perform V2X packet transmission and reception.

[0204] When one or more target terminals 1060 receive configuration information of configuration grant type 1 or configuration information of configuration grant type 2 of mode 1 resource configuration information from base station 1080, side link radio resources may be allocated to target terminal 1060 based on configuration grant type 1 configuration information or configuration grant type 2 configuration information to perform V2X packet transmission and reception. When one or more target terminals 1060 receive mode 2 resource configuration information, i.e., side link radio resource pool or sensing configuration information, from base station 1080, target terminal 1060 may be allocated side link radio resources based on resource configuration information by itself to perform V2X packet transmission and reception. In the embodiment of FIG. 10B , target terminal 1060 may or may not configure an RRC connection with base station 1080.

[0205] Next, a method for processing HARQ feedback in a system supporting mode-2(d) according to various embodiments of the present disclosure will be described. There may be a case where HARQ feedback is specified to be sent for each V2X application required by each target terminal, and a case where HARQ feedback is specified not to be sent. For the case where HARQ feedback is specified to be sent, the base station may allocate HARQ feedback transmission resources or configure configuration information about HARQ feedback transmission resources. As an embodiment, the auxiliary terminal may include HARQ feedback enable / disable indication information about the service of each target terminal in the mode-2(d) auxiliary information to one or more target terminals of the base station. The base station may configure HARQ feedback transmission resource allocation and / or configuration information for the service of each target terminal based on the HARQ feedback enable / disable indication information of the service of each target terminal.

[0206] As another embodiment, when transmitting mode-2(d) auxiliary information of one or more target terminals to the base station, the auxiliary terminal may not separately include HARQ feedback information of the service of each target terminal. The base station may configure sidelink resource allocation and / or configuration information for the service of each target terminal regardless of HARQ feedback. In this case, when the propagation type corresponding to the service of each target terminal is configured as unicast or multicast, the base station may configure HARQ feedback transmission resource allocation and / or configuration information based on this. Each target terminal may determine the HARQ feedback resource based on the transmission resource allocation and / or configuration information configured by the base station.

[0207] For example, when the base station provides HARQ feedback transmission resource allocation and / or configuration information for unicast or multicast, the target terminal can be allocated HARQ feedback transmission resources based on the information. As another example, when the base station does not provide HARQ feedback transmission resource allocation and / or configuration information, the target terminal can allocate HARQ feedback transmission resources by itself. As another example, when the base station does not provide HARQ feedback transmission resource allocation and / or configuration information, the target terminal can allocate HARQ feedback transmission resources by applying the same packet transmission resource allocation and / or configuration information corresponding to the service. As another example, when the base station does not provide HARQ feedback transmission resource allocation and / or configuration information, the target terminal can be allocated HARQ feedback transmission resources based on predefined HARQ feedback transmission resources.

[0208] According to various embodiments of the present disclosure, a method for distinguishing a sidelink resource allocation request for sending a PC5 RRC control message and a sidelink resource allocation request for sending a PC5 data message will be described. For example, when a base station operates a mode for allocating sidelink radio resources according to a conventional method, there is no way to distinguish a resource request for sending a PC5 RRC control message and a resource request for sending a PC5 data message. Therefore, it is impossible to support the distinction between the sending of a control message and a data message, and there is no way to distinguish between a control message or a data message that needs to be sent first.

[0209] The method for distinguishing PC5 RRC control message and PC5 data message provided by the present disclosure may be at least one of the following or a combination thereof: (1) defining PC5-RRC control message indicator / PC5 data message indicator respectively; (2) defining by distinguishing the PQI value corresponding to the PC5-RRC control message and the PQI value corresponding to the PC5 data message; (3) defining by distinguishing the QFI value corresponding to the PC5-RRC control message and the QFI value corresponding to the PC5 data message; (4) defining by distinguishing the priority value corresponding to the PC5-RRC control message and the priority value corresponding to the PC5 data message; (5) defining by distinguishing the destination ID corresponding to the PC5-RRC control message and the destination ID corresponding to the PC5 data message; (6) a message including a sidelink radio resource allocation request corresponding to the PC5-RRC control message does not include a destination ID, and a message including a sidelink radio resource allocation request corresponding to the PC5 data message includes a destination ID (for example, if the SidelinkUEInformation message includes a DST ID, it is used for the PC5 data message, or if the SidelinkUEInformation message does not include a DST ID, it is used for the PC5 RRC control message); and (7) is defined by distinguishing an SR (Scheduling Request) configuration for PC5 RRC control message transmission and an SR configuration for PC5 data message transmission.

[0210] Table 7 shows various examples of the ASN.1 structure of scheme (1).

[0211] [Table 7] ASN.1 structure of solution (1)

[0212]

[0213] Table 8 shows an example of the ASN.1 structure of scheme (6).

[0214] [Table 8] ASN.1 structure of solution (6)

[0215]

[0216] An operation of a terminal and a base station processing sidelink radio resource allocation for a PC5 RRC control message and a PC5 data message according to various embodiments of the present disclosure will be described.

[0217] In one embodiment, a case (eg, scenario 1) of operating a base station scheduling mode (mode 1) is provided.

[0218] When the terminal requests sidelink radio resources for sending a PC5 RRC control message or a PC5 data message, the terminal may send a sidelink radio resource allocation request message to the base station using at least one of the above methods (1) to (6) or a combination thereof.

[0219] A base station that has received a sidelink radio resource request from a terminal in at least one of methods (1) to (6) or a combination thereof can allocate an SR configuration for a PC5 RRC control message and an SR configuration for a PC5 data message, respectively, as in method (7). A base station that has received a sidelink radio resource request from a terminal in at least one of methods (1) to (6) or a combination thereof can allocate an SL resource pool for a PC5 RRC control message and an SL resource pool for a PC5 data message, respectively.

[0220] According to another embodiment of the present disclosure, the base station may pre-configure the SR configuration for the PC5 RRC control message to the terminal supporting PC5 unicast without receiving a separate request from the terminal.

[0221] According to another embodiment of the present disclosure, the base station may separately allocate an SL resource pool for PC5 RRC control messages and an SL resource pool for PC5 data messages without receiving a separate request from the terminal.

[0222] According to another embodiment of the present disclosure, the base station may separately allocate a Uu SR configuration for triggering the transmission of a message of a sidelink radio resource request for a PC5 RRC control message and a Uu SR configuration for triggering the transmission of a message of a sidelink radio resource request for a PC5 data message. For example, an SR configuration for sending a SidelinkUEInformation message including information about a PC5 RRC control message and an SR configuration for sending a SidelinkUEInformation message including information about a PC5 data message may be distinguished.

[0223] When the terminal has enough space in the sidelink radio resources allocated for PC5 RRC control message transmission, the terminal can send PC5 data messages. Conversely, when the terminal has enough space in the sidelink radio resources allocated for PC5 data message transmission, the terminal can send PC5 RRC control messages.

[0224] In one embodiment, a case (eg, scenario 2) of operating a direct terminal allocation mode (mode 2) is provided.

[0225] According to an embodiment of the present disclosure, a sidelink radio resource pool for sending a PC5 RRC control message and a sidelink radio resource pool for sending a PC5 data message may be operated separately.

[0226] According to another embodiment of the present disclosure, if there is no division in the sidelink radio resource pool, the terminal may preferentially allocate resources for sending a PC5 RRC control message.

[0227] According to another embodiment of the present disclosure, if there is no division in the sidelink radio resource pool, the terminal may preferentially allocate resources when the priority value of the PC5 data message is greater than or equal to the priority threshold.

[0228] The methods disclosed in the claims and / or the methods according to the various embodiments described in the present disclosure may be implemented by hardware, software, or a combination of hardware and software.

[0229] When these methods are implemented by software, a computer-readable storage medium for storing one or more programs (software modules) may be provided. One or more programs stored in the computer-readable storage medium may be configured to be executed by one or more processors in an electronic device. The at least one program may include instructions for causing an electronic device to perform methods according to various embodiments of the present disclosure as defined by the appended claims and / or disclosed herein.

[0230] The program (software module or software) can be stored in a non-volatile memory, including random access memory and flash memory, read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), magnetic disk storage device, compact disk-ROM (CD-ROM), digital versatile disk (DVD) or other types of optical storage devices or tapes. Alternatively, any combination of some or all of them can form a memory storing the program. In addition, multiple such memories may be included in the electronic device.

[0231] In addition, the program can be stored in an attachable storage device that can access the electronic device through a communication network such as the Internet, an intranet, a local area network (LAN), a wide LAN (WLAN), and a storage area network (SAN) or a combination thereof. Such a storage device can access the electronic device via an external port. In addition, a separate storage device on a communication network can access the portable electronic device.

[0232] In the above detailed embodiments of the present disclosure, the elements included in the present disclosure are expressed in the singular or plural, depending on the detailed embodiments presented. However, for ease of description, the singular form or plural form is appropriately selected to the presented situation, and the present disclosure is not limited to the elements expressed in the singular or plural form. Therefore, an element expressed in the plural may also include a single element, or an element expressed in the singular may also include multiple elements.

[0233] Although specific embodiments have been described in the detailed description of the present disclosure, modifications and changes may be made thereto without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure should not be defined as limited to the embodiments, but should be defined by the appended claims and their equivalents.

[0234] Although the present disclosure has been described with various embodiments, various changes and modifications may be suggested to one skilled in the art. The present disclosure is intended to encompass such changes and modifications as fall within the scope of the appended claims.

Claims

1. A method for a terminal in a wireless communication system, the method comprising: identifying whether a sidelink wireless communication mode is configured based on at least one predetermined condition; In a case where the sidelink wireless communication mode is configured, identifying whether an auxiliary terminal function of the terminal is activated; identifying at least one target terminal when an auxiliary terminal function of the terminal is activated; as well as receiving information about a sidelink wireless communication mode from the identified target terminal, the information about the sidelink wireless communication mode being sent to a base station for the base station to perform sidelink resource allocation, Wherein, in a case where the terminal supports the auxiliary terminal function and an application related to the sidelink wireless communication mode is executed, the auxiliary terminal function of the terminal is activated.

2. The method according to claim 1, wherein: The at least one predetermined condition includes at least one of the following: the terminal is located in a sidelink wireless communication mode enabled area, an application related to the sidelink wireless communication mode is running, or information for the sidelink wireless communication mode is received from the base station.

3. The method according to claim 1, further comprising: In a case where the auxiliary terminal function of the terminal is not activated, identifying whether the target terminal function of the terminal is activated; searching for at least one auxiliary terminal when a target terminal function of the terminal is activated; selecting a secondary terminal based on at least one of signal strength or battery level information; as well as In case that a plurality of searched auxiliary terminals are identified, the sidelink wireless communication mode auxiliary information is transmitted to the selected auxiliary terminal.

4. The method according to claim 3 also includes sending at least one of the sidelink wireless communication mode auxiliary capability or the target terminal function capability for the sidelink wireless communication mode to the base station when the target terminal function is activated.

5. The method according to claim 1 further includes sending at least one of a sidelink wireless communication mode auxiliary capability or a target terminal function capability for the sidelink wireless communication mode to the base station when the auxiliary terminal function is activated.

6. The method according to claim 1, further comprising: sending, in a case where the auxiliary terminal function is activated, the information on the sidelink wireless communication mode received from the target terminal to the base station; receiving resource configuration information for a sidelink wireless communication mode for a target terminal from the base station; as well as The received resource configuration information is sent to the target terminal.

7. A terminal in a wireless communication system, the terminal comprising: Transceiver; and The controller is configured as: identifying whether a sidelink wireless communication mode is configured based on at least one predetermined condition; In a case where the sidelink wireless communication mode is configured, identifying whether an auxiliary terminal function of the terminal is activated; identifying at least one target terminal when an auxiliary terminal function of the terminal is activated; as well as receiving, via the transceiver, information about a sidelink wireless communication mode from the identified target terminal, the information about the sidelink wireless communication mode being sent to a base station for the base station to perform sidelink resource allocation, Wherein, in a case where the terminal supports the auxiliary terminal function and an application related to the sidelink wireless communication mode is executed, the auxiliary terminal function of the terminal is activated.

8. The terminal according to claim 7, wherein: The at least one predetermined condition includes at least one of the following: the terminal is located in a sidelink wireless communication mode enabled area, an application related to the sidelink wireless communication mode is running, or information for the sidelink wireless communication mode is received from the base station.

9. The terminal according to claim 7, wherein: The controller is also configured to: In a case where the auxiliary terminal function of the terminal is not activated, identifying whether the target terminal function of the terminal is activated; searching for at least one auxiliary terminal when a target terminal function of the terminal is activated; In the case where a plurality of searched auxiliary terminals are identified, selecting an auxiliary terminal based on at least one of signal strength or battery level information; as well as The sidelink wireless communication mode assistance information is transmitted to the selected assistance terminal via the transceiver.

10. The terminal according to claim 9, wherein: In case that the target terminal function is activated, the controller controls the transceiver to transmit at least one of a sidelink wireless communication mode auxiliary capability and a target terminal function capability for the sidelink wireless communication mode to the base station.

11. The terminal according to claim 7, wherein: In case that the auxiliary terminal function is activated, the controller controls the transceiver to transmit at least one of a sidelink wireless communication mode auxiliary capability and a target terminal function capability for the sidelink wireless communication mode to the base station.

12. The terminal according to claim 7, wherein the controller controls the transceiver: sending, in a case where the auxiliary terminal function is activated, the information on the sidelink wireless communication mode received from the target terminal to the base station; receiving resource configuration information for a sidelink wireless communication mode for a target terminal from a base station; as well as The received resource configuration information is sent to the target terminal.

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