Side-link communication

Abstract

One disclosure of this specification provides a method for a UE to perform sidelink communication. The method may include the following steps: determining a transmission power for SL transmission based on the UE's capability information; determining a transmission timing for SL transmission based on the UE's capability information; and transmitting an SL signal based on the transmission timing and the transmission power.

Description

Technical Field

[0001] The present disclosure generally relates to mobile communications. Background Art

[0002] The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a technology for implementing high-speed packet communications. Many solutions have been proposed for LTE targets, including those aimed at reducing user and provider costs, improving service quality, and expanding and improving coverage and system capacity. 3GPP LTE requires reduced cost per bit, increased service availability, flexible use of frequency bands, simple structure, open interfaces, and appropriate terminal power consumption as higher-level requirements.

[0003] The International Telecommunication Union (ITU) and 3GPP have started work to develop requirements and specifications for a New Radio (NR) system. 3GPP has to identify and develop the technical components required for a new Radio Access Technology (RAT) to successfully standardize and meet both urgent market needs in a timely manner and the longer-term requirements put forward by the International Mobile Telecommunications (IMT)-2020 process of the ITU Radiocommunication Sector (ITU-R). In addition, even in the more distant future, NR should be able to use any spectrum band up to at least 100 GHz available for wireless communications.

[0004] The goal of NR is to address all usage scenarios, requirements, and deployment scenarios, including enhanced mobile broadband (eMBB), massive machine type communication (mMTC), ultra-reliable low latency communication (URLLC), etc., within a single technical framework. NR will be inherently forward compatible.

[0005] Sidelink (SL) communication is a communication scheme in which a direct link is established between user equipment (UEs), and the UEs directly exchange voice and data with each other without the intervention of a base station (BS). SL communication is being considered as a solution to the BS overhead caused by rapidly increasing data traffic.

[0006] A method for a UE to simultaneously perform NR V2X (or SL) communication and NR Uu communication is being discussed. For example, a UE can simultaneously transmit an NR SL signal and an NR UL signal. However, in the prior art, there has been no discussion at all about a method for a terminal capable of simultaneously transmitting an NR SL signal and an NR UL signal to efficiently perform NR V2X (or SL) communication and NR Uu communication. For example, there has been no discussion at all about a method for supporting efficient NR V2X (or SL) communication and NR Uu communication of a terminal considering the RF structure and / or capabilities of the terminal. Therefore, when such a terminal simultaneously transmits an SL signal and an UL signal, according to the prior art, it is impossible to effectively determine (or set) the transmission timing and / or transmission power. Summary of the Invention

[0007] Technical problem

[0008] Therefore, efforts have been made in the disclosure of this specification to solve the foregoing problems.

[0009] Technical solution

[0010] To solve the above problems, one disclosure of this specification provides a method for a UE to perform sidelink communication. The method includes: determining a transmission power for SL transmission based on the UE's capability information; determining a transmission timing for SL transmission based on the UE's capability information; and transmitting an SL signal based on the transmission timing and the transmission power.

[0011] To solve the above problems, one disclosure of this specification provides a UE that performs sidelink communication. The UE includes at least one transceiver; at least one processor; and at least one memory that stores instructions and is operably electrically connected to the at least one processor. Operations performed by the at least one processor based on the execution of the instructions include: determining a transmission power for SL transmission based on the UE's capability information; determining a transmission timing for SL transmission based on the UE's capability information; and transmitting an SL signal based on the transmission timing and the transmission power.

[0012] To solve the above problems, one disclosure of this specification provides a method for a base station to perform communication. The method includes: receiving the UE's capability information from the UE; and, based on the UE's capability information, sending scheduling information to the UE.

[0013] To solve the above problems, one disclosure of this specification provides a base station for performing communication. The UE includes at least one transceiver; at least one processor; and at least one memory that stores instructions and is operably electrically connected to the at least one processor. Operations performed based on the instructions being executed by the at least one processor may include: receiving the UE's capability information from the UE; and, based on the UE's capability information, sending scheduling information to the UE.

[0014] To solve the above problems, one disclosure of this specification provides a device in mobile communication. The device includes at least one processor; and at least one memory that stores instructions and is operably electrically connected to the at least one processor, wherein the instructions are executed based on the execution of the at least one processor. The operations include: determining a transmission power for SL transmission based on the device's capability information; determining a transmission timing for SL transmission based on the device's capability information; and generating an SL signal based on the transmission timing and the transmission power.

[0015] To solve the above problems, one disclosure of this specification provides a non - volatile computer - readable storage medium storing instructions. When executed by one or more processors, the instructions cause the one or more processors to: determine a transmission power for SL transmission based on the device's capability information; determine a transmission timing for SL transmission based on the device's capability information; and generate an SL signal based on the transmission timing and the transmission power.

[0016] Effects of the present invention

[0017] According to the disclosure of this specification, the problems of the prior art can be solved.

[0018] The effects that can be obtained through the specific examples of this specification are not limited to the effects listed above. For example, there may be various technical effects that can be understood by those of ordinary skill in the relevant art or derived from this specification. Therefore, the specific effects of this specification are not limited to those explicitly described herein and may include various effects that can be understood or derived from the technical features of this specification. Brief description of the drawings

[0019] Figure 1 An example of a communication system applying an embodiment of this disclosure is shown.

[0020] Figure 2 An example of a wireless device applying an embodiment of this disclosure is shown.

[0021] Figure 3 An example of a wireless device applying an embodiment of this disclosure is shown.

[0022] Figure 4 An example of the structure of an NR system applying an embodiment of this disclosure is illustrated.

[0023] Figure 5 An example of the structure of a time slot of an NR system applying an embodiment of this disclosure is illustrated.

[0024] Figure 6a and 6b An example of a radio protocol architecture for SL communication applying an embodiment of this disclosure is illustrated.

[0025] Figure 7 An example of a UE performing V2X or SL communication applying an embodiment of this disclosure is illustrated.

[0026] Figure 8a and Figure 8b An example of a process in which a UE performs V2X or SL communication based on a transmission mode applying an embodiment of this disclosure is illustrated.

[0027] Figure 9An example is shown schematically illustrating the relationship between uplink timing and downlink timing.

[0028] Figure 10 An example is shown schematically illustrating the relationship between downlink timing and sidelink timing.

[0029] Figure 11 An example of RF structure type 1 of a terminal disclosed according to the present specification is shown.

[0030] Figure 12 An example of RF structure type 2 of a terminal disclosed according to the present specification is shown.

[0031] Figure 13 An example of RF structure type 3 of a terminal disclosed according to the present specification is shown.

[0032] Figure 14 An example of RF structure type 4 of a terminal disclosed according to the present specification is shown.

[0033] Figure 15 An example of the capability signaling disclosed according to the present specification is shown.

[0034] Figure 16 An example of the operation of a terminal according to an embodiment disclosed according to the present specification is shown.

[0035] Figure 17 An example of the operation of a terminal and a base station according to an embodiment disclosed according to the present specification is shown. Figures 18a to 18d is for describing in detail Figure 11 the example of Detailed Description

[0036] The following techniques, apparatuses, and systems can be applied to various wireless multi-access systems. Examples of multi-access systems include Code Division Multiple Access (CDMA) systems, Frequency Division Multiple Access (FDMA) systems, Time Division Multiple Access (TDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single-Carrier Frequency Division Multiple Access (SC-FDMA) systems, and Multi-Carrier Frequency Division Multiple Access (MC-FDMA) systems. CDMA can be implemented by radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented by radio technologies such as Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), or Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented by radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, or Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of the Evolved UMTS (E-UMTS) that uses E-UTRA. 3GPP LTE employs OFDMA in the DL and SC-FDMA in the UL. The evolution of 3GPP LTE includes LTE-A (Advanced), pre-LTE-A, and / or 5G NR (New Radio).

[0037] For the sake of convenience of description, embodiments of the present disclosure are mainly described with respect to 3GPP-based wireless communication systems. However, the technical features of the present disclosure are not limited thereto. For example, although the following detailed description is given based on a mobile communication system corresponding to a 3GPP-based wireless communication system, aspects of the present disclosure that are not limited to 3GPP-based wireless communication systems are applicable to other mobile communication systems.

[0038] Regarding terms and technologies not specifically described among the terms and technologies adopted in the present invention, reference can be made to wireless communication standard documents published prior to the present disclosure.

[0039] In the present disclosure, "A or B" can mean "only A", "only B", or "both A and B". In other words, "A or B" in the present disclosure can be interpreted as "A and / or B". For example, "A, B, or C" in the present disclosure can mean "only A", "only B", "only C", or "any combination of A, B, and C".

[0040] In the present disclosure, a slash ( / ) or a comma (,) can mean "and / or". For example, "A / B" can mean "A and / or B". Therefore, "A / B" can mean "only A", "only B", or "both A and B". For example, "A, B, C" can mean "A, B, or C".

[0041] In the present disclosure, "at least one of A and B" may mean "only A", "only B", or "both A and B". Additionally, the expressions "at least one of A or B" or "at least one of A and / or B" in the present disclosure may be interpreted the same as "at least one of A and B".

[0042] Additionally, in the present disclosure, "at least one of A, B, and C" may mean "only A", "only B", "only C", or "any combination of A, B, and C". Additionally, "at least one of A, B, or C" or "at least one of A, B, and / or C" may mean "at least one of A, B, and C".

[0043] Similarly, parentheses used in the present disclosure may mean "for example". Specifically, when shown as "control information (PDCCH)", "PDCCH" may be proposed as an example of "control information". In other words, "control information" in the present disclosure is not limited to "PDCCH", and "PDCCH" may be proposed as an example of "control information". Additionally, even when shown as "control information (i.e., PDCCH)", "PDCCH" may be proposed as an example of "control information".

[0044] The technical features separately described in one drawing in the present disclosure may be implemented separately or simultaneously.

[0045] Although not limited thereto, the various descriptions, functions, processes, suggestions, methods, and / or operation flowcharts of the present disclosure disclosed herein may be applied to various fields that require wireless communication and / or connection (e.g., 5G) between devices.

[0046] Hereinafter, the present disclosure will be described in more detail with reference to the drawings. Unless otherwise specified, the same reference numerals in the following drawings and / or descriptions may refer to the same and / or corresponding hardware blocks, software blocks, and / or functional blocks.

[0047] In the drawings, a user equipment (UE) is shown in an exemplary manner. However, the shown UE may also be referred to by terms such as a terminal, a mobile device (ME), etc. Additionally, the UE may be not only a portable device such as a notebook, a mobile phone, a PDA, a smartphone, a multimedia device, but also a non-portable device such as a PC and a vehicle-mounted device.

[0048] Hereinafter, the UE is used as an example of a wireless communication device (or wireless apparatus or wireless device) available for wireless communication. Operations performed by the UE may be performed by a wireless communication device. A wireless communication device may also be referred to as a wireless apparatus or a wireless device. Hereinafter, AMF may mean an AMF node, SMF may mean an SMF node, and UPF may mean a UPF node.

[0049] The term "base station" used hereinafter can generally be referred to as a fixed station that communicates with wireless devices and can also be referred to by different terms such as evolved Node B (eNodeB), evolved Node B (eNB), Base Transceiver Station (BTS), access point, next-generation Node B (gNB), etc.

[0050] I. Technologies and processes disclosed applicable to this specification.

[0051] Figure 1 An example of a communication system showing an embodiment applying the present disclosure is shown.

[0052] Figure 1 The 5G usage scenarios shown in are merely exemplary, and the technical features of the present disclosure can be applied to Figure 1 other 5G usage scenarios not shown in.

[0053] The three main requirement categories for 5G include (1) the enhanced mobile broadband (eMBB) category, (2) the massive machine type communication (mMTC) category, and (3) the ultra-reliable low-latency communication (URLLC) category.

[0054] Some use cases may require multiple categories for optimization, and other use cases may focus only on one key performance indicator (KPI). 5G uses flexible and reliable methods to support such various use cases.

[0055] Referring to Figure 1 , communication system 1 includes wireless devices 100a to 100f, a base station (BS) 200, and a network 300. Although Figure 1 the 5G network is illustrated as an example of the network of communication system 1, the embodiments of the present disclosure are not limited to 5G systems and can be applied to future communication systems beyond 5G systems.

[0056] The BS 200 and the network 300 can be implemented as wireless devices, and a specific wireless device can operate as a BS / network node relative to other wireless devices.

[0057] Wireless devices 100a to 100f represent devices that perform communication using a radio access technology (RAT) (e.g., 5G New RAT (NR) or LTE) and can be referred to as communication / radio / 5G devices. Wireless devices 100a to 100f may include, but are not limited to, robot 100a, vehicles 100b-1 and 100b-2, extended reality (XR) device 100c, handheld device 100d, household appliance 100e, IoT device 100f, and artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with wireless communication capabilities, an autonomous driving vehicle, and a vehicle capable of performing communication between vehicles. A vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device may include an AR / VR / hybrid reality (MR) device and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a TV, a smartphone, a computer, a wearable device, a household appliance device, a digital sign, a vehicle, a robot, etc. The handheld device may include a smartphone, a smart board, a wearable device (e.g., a smartwatch or smart glasses), and a computer (e.g., a laptop computer). The household appliance may include a TV, a refrigerator, and a washing machine. The IoT device may include sensors and smart meters.

[0058] In the present disclosure, wireless devices 100a to 100f may be referred to as user equipment (UE). The UE may include, for example, a cellular phone, a smartphone, a laptop computer, a digital broadcast terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation system, a tablet personal computer (PC), a tablet PC, a superbook, a vehicle, a vehicle with autonomous driving capabilities, a connected car, a UAV, an AI module, a robot, an AR device, a VR device, an MR device, a holographic device, a public safety device, an MTC device, an IoT device, a medical device, a fintech device (or financial device), a security device, a weather / environment device, a device related to 5G services, or a device related to the fourth industrial revolution field.

[0059] A UAV may be, for example, an aircraft that is driven by a wireless control signal without a human on board.

[0060] The VR device may include, for example, a device for implementing an object or background of a virtual world. The AR device may include, for example, a device implemented by connecting an object or background of a virtual world to an object or background of the real world. The MR device may include, for example, a device implemented by fusing an object or background of a virtual world into an object or background of the real world. The holographic device may include, for example, a device for implementing a 360-degree stereoscopic image by using the interference phenomenon of light generated when two lasers called holography meet to record and reproduce three-dimensional information.

[0061] Public safety devices may include, for example, image relay devices or image devices that can be worn on a user's body.

[0062] MTC devices and IoT devices may be, for example, devices that do not require direct human intervention or manipulation. For example, MTC devices and IoT devices may include smart meters, vending machines, thermometers, smart light bulbs, door locks, or various sensors.

[0063] Medical devices may be, for example, devices for the purpose of diagnosing, treating, alleviating, curing, or preventing diseases. For example, medical devices may be devices for the purpose of diagnosing, treating, alleviating, or correcting injuries or impairments. For example, medical devices may be devices for the purpose of examining, replacing, or modifying structures or functions. For example, medical devices may be devices for the purpose of regulating pregnancy. For example, medical devices may include devices for treatment, devices for operation, devices for (in vitro) diagnosis, hearing aids, or devices for processes.

[0064] Security devices may be, for example, devices installed to prevent possible dangers and maintain security. For example, security devices may be cameras, closed-circuit TVs (CCTVs), recorders, or black boxes.

[0065] Fintech devices may be, for example, devices capable of providing financial services such as mobile payments. For example, fintech devices may include payment devices or point-of-sale (POS) systems.

[0066] Weather / environment devices may include, for example, devices for monitoring or predicting weather / environment.

[0067] Wireless devices 100a to 100f may be connected to network 300 via BS 200. AI technology may be applied to wireless devices 100a to 100f and wireless devices 100a to 100f may be connected to AI server 400 via network 300. Network 300 may be configured using 3G networks, 4G (e.g., LTE) networks, 5G (e.g., NR) networks, and ultra-5G networks. Although wireless devices 100a to 100f may communicate with each other via BS 200 / network 300, wireless devices 100a to 100f may perform direct communication (e.g., sidelink communication) with each other without going through BS 200 / network 300. For example, vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) may perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0068] Wireless communications / connections 150a, 150b, and 150c can be established between wireless devices 100a to 100f and / or between wireless devices 100a to 100f and BS 200 and / or between BS 200s. In this document, wireless communications / connections can be established through various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication (or device-to-device (D2D) communication) 150b, inter-base station communication 150c (e.g., relay, integrated access and backhaul (IAB)), and so on. Wireless devices 100a to 100f and BS 200 / wireless devices 100a to 100f can send / receive radio signals to / from each other through wireless communications / connections 150a, 150b, and 150c. For example, wireless communications / connections 150a, 150b, and 150c can send / receive signals through various physical channels. To this end, at least a part of various configuration information configuration processes, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes for sending / receiving radio signals can be performed based on various proposals of the present disclosure.

[0069] AI refers to the field of studying artificial intelligence or the methodology capable of creating it, and machine learning refers to the field of defining various problems solved in the AI field and the methodology for solving these problems. Machine learning is also defined as an algorithm that increases task performance through stable experience of a task.

[0070] A robot means a machine that automatically processes or operates a given task through its own capabilities. In particular, a robot with the ability to recognize the environment and autonomously decide to perform an action can be called an intelligent robot. Depending on the use or application field, robots can be classified as industrial, medical, household, military, etc. Robots can perform various physical operations, such as moving robot joints using actuators or motors. A mobile robot also includes wheels, brakes, propellers, etc. on its drive, enabling it to travel on the ground or fly in the air.

[0071] Autonomous driving means a technology of driving by itself, and an autonomous vehicle means a vehicle that drives with little or no user control. For example, autonomous driving can include lane-keeping, automatic speed adjustment such as adaptive cruise control, autonomous driving along a set route, and automatically setting a route when a destination is set. Vehicles include vehicles equipped with an internal combustion engine, hybrid vehicles equipped with an internal combustion engine and an electric motor, electric vehicles equipped with an electric motor, and may include trains, motorcycles, etc., as well as cars. An autonomous vehicle can be regarded as a robot with autonomous driving capabilities.

[0072] Extended reality is collectively referred to as VR, AR, and MR. VR technology provides real-world objects and backgrounds only through computer graphics (CG) images. AR technology provides virtual CG images on top of real object images. MR technology is a CG technology that combines and integrates virtual objects into the real world. MR technology is similar to AR technology in that they both show real and virtual objects together. However, the difference is that in AR technology, virtual objects are used as a supplementary form to real objects, while in MR technology, virtual objects and real objects are used as equal entities.

[0073] NR supports multiple parameter sets (and / or multiple subcarrier spacings (SCS)) to support various 5G services. For example, if the SCS is 15 kHz, it can support wide areas in traditional cellular bands; and if the SCS is 30 kHz / 60 kHz, it can support dense cities, lower latency, and wider carrier bandwidths. If the SCS is 60 kHz or higher, it can support bandwidths greater than 24.25 GHz to overcome phase noise.

[0074] NR frequency bands can be defined as two types of frequency ranges, namely, FR1 and FR2. The numerical values of the frequency ranges can be changed. For example, the frequency ranges of the two types (FR1 and FR2) can be as shown in Table 1 below. For the sake of illustration, in the frequency ranges used in the NR system, FR1 may mean "below 6 GHz range", and FR2 can mean "above 6 GHz range", which can be called millimeter wave (mmW).

[0075] [Table 1]

[0076] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 450 MHz – 6000 MHz 15, 30, 60 kHz FR2 24250 MHz – 52600 MHz 60, 120, 240 kHz

[0077] As mentioned above, the numerical values of the frequency ranges of the NR system can be changed. For example, FR1 can include frequency bands from 410 MHz to 7125 MHz, as shown in Table 2 below. That is to say, FR1 can include frequency bands of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or more. For example, the frequency bands of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or more included in FR1 can also contain unlicensed frequency bands. Unlicensed frequency bands can be used for various purposes, such as for vehicle communication (e.g., autonomous driving).

[0078] [Table 2]

[0079] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 410 MHz – 7125 MHz 15, 30, 60 kHz FR2 24250 MHz – 52600 MHz 60, 120, 240 kHz

[0080] Here, the radio communication technologies implemented in the wireless devices of the present disclosure may include NarrowBand Internet of Things (NB-IoT) technology for low-power communication, as well as LTE, NR, and 6G. For example, NB-IoT technology may be an example of a Low-Power Wide-Area Network (LPWAN) technology, may be implemented in specifications such as LTE Cat NB1 and / or LTE Cat NB2, and may not be limited to the names mentioned above. Additionally and / or alternatively, the radio communication technologies implemented in the wireless devices of the present disclosure may communicate based on LTE-M technology. For example, LTE-M technology may be an example of an LPWAN technology and may be referred to by various names such as Enhanced Machine-Type Communication (eMTC). For example, LTE-M technology may be implemented in at least one of various specifications, such as 1) LTE Cat 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE Non-Bandwidth Limited (Non-BL), 5) LTE-MTC, 6) LTE Machine-Type Communication, and / or 7) LTE M, and may not be limited to the names mentioned above. Additionally and / or alternatively, the radio communication technologies implemented in the wireless devices of the present disclosure may include at least one of ZigBee, Bluetooth, and / or LPWAN, which takes into account low-power communication, and may not be limited to the names mentioned above. For example, ZigBee technology may generate a Personal Area Network (PAN) associated with small / low-power digital communication based on various specifications such as IEEE 802.15.4, and may be referred to by various names.

[0081] Figure 2 An example of a wireless device to which an embodiment of the present disclosure is applied is shown.

[0082] Reference Figure 2 , the first wireless device 100 and the second wireless device 200 may transmit / receive radio signals to / from an external device via various RATs (e.g., LTE and NR).

[0083] In Figure 2 , {the first wireless device 100 and the second wireless device 200} may correspond to Figure 1 at least one of {wireless devices 100a to 100f and BS 200}, {wireless devices 100a to 100f and wireless devices 100a to 100f}, and / or {BS 200 and BS 200}.

[0084] The first wireless device 100 may include at least one transceiver, such as transceiver 106; at least one processing chip, such as processing chip 101; and / or one or more antennas 108.

[0085] The processing chip 101 may include at least one processor, such as processor 102, and at least one memory, such as memory 104. As Figure 2 exemplarily shown in, the memory 104 is included in the processing chip 101. Additionally and / or alternatively, the memory 104 may be placed outside the processing chip 101.

[0086] The processor 102 may control the memory 104 and / or the transceiver 106 and may be configured to implement the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts described in the present disclosure. For example, the processor 102 may process the information within the memory 104 to generate a first information / signal, and then transmit a radio signal including the first information / signal through the transceiver 106. The processor 102 may receive a radio signal 106 including a second information / signal through the transceiver and then store the information obtained by processing the second information / signal in the memory 104.

[0087] The memory 104 may be operably connected to the processor 102. The memory 104 may store various types of information and / or instructions. The memory 104 may store software code 105 for implementing instructions, which, when executed by the processor 102, execute the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in the present disclosure. For example, the software code 105 may implement instructions that, when executed by the processor 102, execute the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in the present disclosure. For example, the software code 105 may control the processor 102 to execute one or more protocols. For example, the software code 105 may control the processor 102 to execute one or more layers of a radio interface protocol.

[0088] Herein, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals through one or more antennas 108. Each of the transceivers 106 may include a transmitter and / or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In the present disclosure, the first wireless device 100 may represent a communication modem / circuit / chip.

[0089] The second wireless device 200 may include at least one transceiver, such as transceiver 206; at least one processing chip, such as processing chip 201; and / or one or more antennas 208.

[0090] The processing chip 201 may include at least one processor, such as processor 202, and at least one memory, such as memory 204. As Figure 2Exemplarily shown in the figure, the memory 204 is included in the processing chip 201. Additionally and / or alternatively, the memory 204 may be placed outside the processing chip 201.

[0091] The processor 202 may control the memory 204 and / or the transceiver 206 and may be configured to implement the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts described in the present disclosure. For example, the processor 202 may process the information within the memory 204 to generate third information / signals, and then transmit radio signals including the third information / signals through the transceiver 206. The processor 202 may receive radio signals including fourth information / signals through the transceiver 106, and then store the information obtained by processing the fourth information / signals in the memory 204.

[0092] The memory 204 may be operably connected to the processor 202. The memory 204 may store various types of information and / or instructions. The memory 204 may store software code 205 for implementing instructions, which, when executed by the processor 202, execute the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in the present disclosure. For example, the software code 205 may implement instructions that, when executed by the processor 202, execute the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in the present disclosure. For example, the software code 205 may control the processor 202 to execute one or more protocols. For example, the software code 205 may control the processor 202 to execute one or more layers of a radio interface protocol.

[0093] In this document, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals through one or more antennas 208. Each of the transceivers 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with the RF unit. In the present disclosure, the second wireless device 200 may represent a communication modem / circuit / chip.

[0094] In the following, the hardware components of wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by, but not limited to, one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as a physical (PHY) layer, a media access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and a service data adaptation protocol (SDAP) layer). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) from one or more transceivers 106 and 206 and obtain PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure.

[0095] One or more processors 102 and 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, suggestions, methods, and / or flowcharts of operations disclosed in the present disclosure may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. The firmware or software configured to execute the descriptions, functions, processes, suggestions, methods, and / or flowcharts of operations disclosed in the present disclosure may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 for driving by one or more processors 102 and 202. The descriptions, functions, processes, suggestions, methods, and / or flowcharts of operations disclosed in the present disclosure may be implemented using firmware or software in the form of code, commands, and / or command sets.

[0096] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories 104 and 204 may be configured by read only memory (ROM), random access memory (RAM), electrically erasable programmable read only memory (EPROM), flash memory, hard disk drive, register, cache memory, computer readable storage medium, and / or a combination thereof. One or more memories 104 and 204 may be located inside and / or outside one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 by various techniques such as wired or wireless connections.

[0097] One or more transceivers 106 and 206 may send user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, procedures, suggestions, methods, and / or operation flowcharts disclosed in this disclosure to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, procedures, suggestions, methods, and / or operation flowcharts disclosed in this disclosure from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and send and receive radio signals. For example, one or more processors 102 and 202 may perform control such that one or more transceivers 106 and 206 may send user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform control such that one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices.

[0098] One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to send and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, procedures, suggestions, methods, and / or operation flowcharts disclosed in this disclosure through one or more antennas 108 and 208. In this disclosure, one or more antennas 108 and 208 may be multiple physical antennas or multiple logical antennas (e.g., antenna ports).

[0099] One or more transceivers 106 and 206 may convert received user data, control information, radio signals / channels, etc. from RF-band signals into baseband signals for processing the received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals into RF-band signals. To this end, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters. For example, one or more transceivers 106 and 206 are capable of up-converting an OFDM baseband signal to an OFDM signal through their (analog) oscillators and / or filters under the control of one or more processors 102 and 202 and sending the up-converted OFDM signal at a carrier frequency. One or more transceivers 106 and 206 may receive an OFDM signal at a carrier frequency and down-convert the OFDM signal to an OFDM baseband signal through their (analog) oscillators and / or filters under the control of one or more transceivers 102 and 202.

[0100] In an embodiment of the present disclosure, the UE may operate as a transmitting device in the uplink (UL) and as a receiving device in the downlink (DL). In an embodiment of the present disclosure, the BS may operate as a receiving device in the UL and as a transmitting device in the DL. Hereinafter, for convenience of description, it is mainly assumed that the first wireless device 100 is the UE and the second wireless device 200 is the BS. For example, a processor 102 connected to, installed on, or started in the first wireless device 100 may be configured to perform UE behavior according to an embodiment of the present disclosure or control a transceiver 106 to perform UE behavior according to an embodiment of the present disclosure. A processor 202 connected to, installed on, or started in the second wireless device 200 may be configured to perform BS behavior according to an embodiment of the present disclosure or control a transceiver 206 to perform BS behavior according to an embodiment of the present disclosure.

[0101] In the present disclosure, the BS is also referred to as a Node B (NB), an evolved Node B (eNB), or a gNB.

[0102] Figure 3 An example of a wireless device to which an embodiment of the present disclosure is applied is shown.

[0103] The wireless device may be implemented in various forms according to use cases / services (refer to Figure 1 ).

[0104] Refer to Figure 3 , the wireless devices 100 and 200 may correspond to the wireless devices 100 and 200 of Figure 2 and may be configured by various elements, components, units / parts, and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and additional components 140. The communication unit 110 may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include Figure 2 one or more processors 102 and 202 of Figure 2 and / or Figure 2 one or more memories 104 and 204 of Figure 2One or more antennas 108 and 208. The control unit 120 is electrically connected to the communication unit 110, the storage unit 130, and the additional components 140 and controls the overall operation of each of the wireless devices 100 and 200. For example, the control unit 120 may control the electrical / mechanical operations of each of the wireless devices 100 and 200 based on programs / codes / commands / information stored in the memory unit 130. The control unit 120 may send the information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface or store the information received from the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface in the memory unit 130.

[0105] The additional components 140 may be configured differently according to the types of the wireless devices 100 and 200. For example, the additional components 140 may include at least one of a power unit / battery, an input / output (I / O) unit (e.g., an audio I / O port, a video I / O port), a driving unit, and a computing unit. The wireless devices 100 and 200 may be implemented in the following forms (but are not limited thereto): a robot ( Figure 1 of 100a), a vehicle ( Figure 1 of 100b-1 and 100b-2), an XR device ( Figure 1 of 100c), a handheld device ( Figure 1 of 100d), a home appliance ( Figure 1 of 100e), an IoT device ( Figure 1 of 100f), a digital broadcast terminal, a holographic device, a public safety device, an MTC device, a medical device, a fintech device (or a financial device), a security device, a climate / environment device, an AI server / device ( Figure 1 in 400), a BS ( Figure 1 in 200), a network node, etc. The wireless devices 100 and 200 may be used in mobile or fixed locations according to usage examples / services.

[0106] In Figure 3Among them, all of the various elements, components, units / parts, and / or modules in wireless devices 100 and 200 can be connected to each other through a wired interface, or at least a part of them can be connected wirelessly through communication unit 110. For example, in each of wireless devices 100 and 200, control unit 120 and communication unit 110 can be connected by a wire, and control unit 120 and the first units (e.g., 130 and 140) can be connected wirelessly through communication unit 110. Each element, component, unit / part, and / or module within wireless devices 100 and 200 can also include one or more elements. For example, control unit 120 can be configured by a set of one or more processors. As an example, control unit 120 can be configured by a set of a communication control processor, an application processor (AP), an electronic control unit (ECU), a graphics processing unit, and a memory control processor. As another example, storage unit 130 can be configured by RAM, DRAM, ROM, flash memory, volatile memory, non-volatile memory, and / or their combination.

[0107] Figure 4 An example of the structure of an NR system to which embodiments of the present disclosure are applied is illustrated.

[0108] Figure 4 The structure of an NR system according to an embodiment of the present disclosure is shown. Figure 4 Embodiments of can be combined with various embodiments of the present disclosure.

[0109] Reference Figure 4 , in NR, radio frames can be used to perform uplink and downlink transmissions. The length of a radio frame is 10 ms, and it can be defined as being configured by two half-frames (HFs). A half-frame can include five 1-ms sub-frames (SFs). A sub-frame (SF) can be divided into one or more time slots, and the number of time slots within a sub-frame can be determined according to the subcarrier spacing (SCS). Each time slot can include 12 or 14 OFDM(A) symbols according to the cyclic prefix (CP).

[0110] In the case of using normal CP, each time slot can include 14 symbols. In the case of using extended CP, each time slot can include 12 symbols. Herein, a symbol can include an OFDM symbol (or CP-OFDM symbol) and a single-carrier FDMA (SC-FDMA) symbol (or discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol).

[0111] Figure 5 An example of the structure of a time slot of an NR system to which embodiments of the present disclosure are applied is illustrated.

[0112] Figure 5Shows the structure of a time slot of an NR frame according to an embodiment of the present disclosure. Figure 5 Embodiments of may be combined with various embodiments of the present disclosure.

[0113] Referring to Figure 5 , a time slot includes a plurality of symbols in the time domain. For example, in the case of normal CP, one time slot may include 14 symbols. For example, in the case of extended CP, one time slot may include 12 symbols. Alternatively, in the case of normal CP, one time slot may include 7 symbols. However, in the case of extended CP, one time slot may include 6 symbols.

[0114] A carrier includes a plurality of subcarriers in the frequency domain. A resource block (RB) may be defined as a plurality of consecutive subcarriers in the frequency domain (e.g., 12 subcarriers). A bandwidth part (BWP) may be defined as a plurality of consecutive (physical) resource blocks ((P)RB) in the frequency domain, and the BWP may correspond to a type of parameter set (e.g., SCS, CP length, etc.). A carrier may include up to N BWPs (e.g., 5 BWPs). Data communication may be performed via an activated BWP. Each element may be referred to as a resource element (RE) in a resource grid, and one complex symbol may be mapped to each element.

[0115] Meanwhile, a radio interface between a UE and another UE or a radio interface between a UE and a network may be composed of an L1 layer, an L2 layer, and an L3 layer. In various embodiments of the present disclosure, the L1 layer may refer to the physical layer. Additionally, for example, the L2 layer may refer to at least one of a MAC layer, an RLC layer, a PDCP layer, and an SDAP layer. Additionally, for example, the L3 layer may refer to an RRC layer.

[0116] Hereinafter, V2X or SL communication will be described.

[0117] Figure 6a and Figure 6b Illustrates an example of a radio protocol architecture for SL communication applying an embodiment of the present disclosure.

[0118] Figure 6a and Figure 6b Shows a radio protocol architecture for SL communication according to an embodiment of the present disclosure. Figure 6a and Figure 6b Embodiments of may be combined with various embodiments of the present disclosure. More specifically, Figure 6a Illustrates a user plane protocol stack, and Figure 6b Illustrates a control plane protocol stack.

[0119] Hereinafter, side - link synchronization signals (SLSS) and synchronization information will be described.

[0120] The SLSS may include a Primary Sidelink Synchronization Signal (PSSS) and a Secondary Sidelink Synchronization Signal (SSSS) as SL-specific sequences. The PSSS may be referred to as the Sidelink Primary Synchronization Signal (S-PSS), and the SSSS may be referred to as the Sidelink Secondary Synchronization Signal (S-SSS). For example, an M-sequence of length 127 may be used for the S-PSS, and a gold sequence of length 127 may be used for the S-SSS. For example, the UE may use the S-PSS for initial signal detection and synchronization acquisition. For example, the UE may use the S-PSS and S-SSS for obtaining detailed synchronization and for detecting the synchronization signal ID.

[0121] The Physical Sidelink Broadcast Channel (PSBCH) may be a (broadcast) channel for transmitting default (system) information that needs to be known by the UE first before SL signal transmission / reception. For example, the default information may be information related to SLSS, duplex mode (DM), Time Division Duplex (TDD) uplink / downlink (UL / DL) configuration, information related to resource pools, the type of application related to SLSS, subframe offset, broadcast information, etc. For example, in order to evaluate the PSBCH performance, in NR V2X, the payload size of the PSBCH may be 56 bits including a 24-bit CRC.

[0122] The S-PSS, S-SSS, and PSBCH may be included in a block format that supports periodic transmission (e.g., the SL Synchronization Signal (SS) / PSBCH block, hereinafter, the Sidelink Synchronization Signal Block (S-SSB)). The S-SSB may have the same parameter set (i.e., SCS and CP length) as the Physical Sidelink Control Channel (PSCCH) / Physical Sidelink Shared Channel (PSSCH) in the carrier, and the transmission bandwidth may be within the (pre)-configured Sidelink (SL) BWP. For example, the S-SSB may have a bandwidth of 11 resource blocks (RBs). For example, the PSBCH may span 11 RBs. Additionally, the frequency position of the S-SSB may be (pre)-configured. Thus, the UE does not have to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0123] Figure 7 An example of a UE that performs V2X or SL communication applying embodiments of the present disclosure is illustrated.

[0124] Figure 7 A UE that performs V2X or SL communication according to an embodiment of the present disclosure is shown. Figure 7 Embodiments of may be combined with various embodiments of the present disclosure.

[0125] Reference Figure 7, in V2X or SL communication, the term "terminal" usually can mean a user's UE. However, in the case where a network device such as a BS transmits / receives signals according to the communication scheme between UEs, the BS can also be regarded as a kind of UE. For example, UE 1 can be the first device 100, and UE 2 can be the second device 200.

[0126] For example, UE 1 can select a resource unit corresponding to a specific resource in the resource pool, which means a collection of a series of resources. In addition, UE 1 can use the resource unit to send an SL signal. For example, the resource pool in which UE 1 can send signals can be configured for UE 2 as the receiving UE, and the signal of UE 1 can be detected in the resource pool.

[0127] Here, in the case where UE 1 is within the connectivity range of the BS, the BS can notify the resource pool to UE 1. On the other hand, in the case where UE 1 is outside the connectivity range of the BS, another UE can notify the resource pool to UE 1, or UE 1 can use a pre-configured resource pool.

[0128] Generally speaking, the resource pool can be configured in units of multiple resources, and each UE can select one or more resource units to use in its SL signal transmission.

[0129] Hereinafter, the resource allocation in SL will be described.

[0130] Figure 8a and Figure 8b illustrates an example of a process in which a UE performs V2X or SL communication based on a transmission mode according to an embodiment of the present disclosure.

[0131] Figure 8a and Figure 8b shows a process in which a UE performs V2X or SL communication based on a transmission mode according to an embodiment of the present disclosure. Figure 8a and Figure 8b The embodiments of can be combined with various embodiments of the present disclosure. In various embodiments of the present disclosure, the transmission mode can be referred to as a mode or a resource allocation mode. Hereinafter, for the convenience of explanation, in LTE, the transmission mode is referred to as the LTE transmission mode. In NR, the transmission mode can be referred to as the NR resource allocation mode.

[0132] For example, Figure 8a illustrates UE operations related to LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, Figure 8a illustrates UE operations related to NR resource allocation mode 1. For example, LTE transmission mode 1 can be applied to general SL communication, and LTE transmission mode 3 can be applied to V2X communication.

[0133] For example, Figure 8b illustrates UE operations related to LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, Figure 8b illustrates UE operations related to NR resource allocation mode 2.

[0134] Referring to Figure 8a , in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the BS may schedule SL resources to be used by the UE for SL transmission. For example, the BS may perform resource scheduling for UE 1 via the PDCCH (more specifically, downlink control information (DCI)), and UE 1 may perform V2X or SL communication relative to UE 2 according to the resource scheduling. For example, UE 1 may send sidelink control information (SCI) to UE 2 via the physical sidelink control channel (PSCCH), and then send SCI-based data to UE 2 via the physical sidelink shared channel (PSSCH).

[0135] Referring to Figure 8b , in LTE transmission mode 2, LTE transmission mode 4, or NR resource allocation mode 2, the UE may determine SL transmission resources within SL resources configured by the BS / network or pre-configured SL resources. For example, the configured SL resources or pre-configured SL resources may be a resource pool. For example, the UE may autonomously select or schedule resources for SL transmission. For example, the UE may perform SL communication by autonomously selecting resources within the configured resource pool. For example, the UE may autonomously select resources within a selective window by performing a sensing and resource (re)selection process. For example, sensing may be performed on a sub-channel basis. In addition, UE 1 that has autonomously selected resources within the resource pool may send SCI to UE 2 via the PSCCH, and then may send SCI-based data to UE 2 via the PSSCH.

[0136] As a reference, Table 3 below shows examples of operating frequency bands used for V2X (or SL) communication.

[0137] [Table 3]

[0138]

[0139] When operating frequency band 47 according to the example of Table 3 is used for E-UTRA V2X (or SL) communication, operating frequency band 47 may be referred to as B47. When operating frequency band 47 according to the example of Table 3 is used for NR V2X (or SL) communication, operating frequency band 47 may be referred to as n47. When operating frequency band 39 according to the example of Table 3 is used for E-UTRA V2X (or SL) communication, operating frequency band 39 may be referred to as B39. When operating frequency band 39 according to the example of Table 3 is used for NR V2X (or SL) communication, operating frequency band 39 may be referred to as n39.

[0140] As a reference, at least one proposed solution according to various embodiments of the present disclosure can be applied not only to sidelink communication or V2X communication based on the PC5 interface or SL interface (e.g., PSCCH, PSSCH, PSBCH, PSSS / SSSS, etc.), but also to sidelink communication or V2X communication based on the Uu interface (e.g., PUSCH, PDSCH, PDCCH, PUCCH, etc.).

[0141] In various embodiments of the present disclosure, the receiving operation of the UE may include decoding operations and / or receiving operations of sidelink channels and / or sidelink signals (e.g., PSCCH, PSSCH, PSFCH, PSBCH, PSSS / SSSS, etc.). In various embodiments of the present disclosure, the transmitting operation of the UE may include transmitting operations of sidelink channels and / or sidelink signals (e.g., PSCCH, PSSCH, PSFCH, PSBCH, PSSS / SSSS, etc.).

[0142] Meanwhile, in various embodiments of the present disclosure, for example, for the sake of convenience of description, the (physical) channel used for the RX UE to send at least one of the following information to the TX UE may be referred to as PSFCH.

[0143] - SL HARQ feedback, SL CSI, SL (L1) RSRP

[0144] Meanwhile, in various embodiments of the present disclosure, the Uu channel may include a UL channel and / or a DL channel. For example, the UL channel may include PUSCH, PUCCH, etc. For example, the DL channel may include PDCCH, PDSCH, etc. For example, the SL channel may include PSCCH, PSSCH, PSFCH, PSBCH, etc.

[0145] <Timing Advance (TA)>

[0146] Hereinafter, the timing advance (TA) related to the transmission of signals on a specific carrier (e.g., NR UL signal transmission or NR V2X (or SL) signal transmission) will be described.

[0147] 1. Before describing the method for determining the timing advance value associated with D2D transmission, the symbols and abbreviations associated with the timing advance value are as follows.

[0148] -T s : Basic time unit. For reference, instead of T s , T c can be used as the basic time unit. For example, in NR-based communication, T c can be used as the basic time unit.

[0149] -N TA : Timing offset between the uplink and downlink in the UE, expressed in units of Ts

[0150] -N TA_offset : Fixed timing advance offset, expressed in units of Ts

[0151] -N TA,SL : Timing offset between the sidelink and the timing reference frame in the UE, expressed in units of T s as the unit of expression

[0152] 2. Frame structure

[0153] In the time domain, the sizes of various fields can be expressed as the number of time units, i.e., T s = 1 / (15000x2048) seconds.

[0154] The downlink, uplink, and sidelink transmissions can be configured to have a radio frame with a duration of T f = 307200x Ts = 10 ms.

[0155] In the following, two types of radio frame structures can be supported.

[0156] - Type 1: Applicable to FDD

[0157] - Type 2: Applicable to TDD

[0158] Transmissions in multiple cells can be aggregated with up to four secondary cells in addition to the primary cell. In multi-cell aggregation, different frame structures can be used in different serving cells.

[0159] 3. Uplink-downlink frame timing

[0160] Figure 9 An example is shown to schematically illustrate the relationship between uplink timing and downlink timing.

[0161] Figure 9 Schematically illustrates the uplink-downlink timing relationship. AsFigure 9 As shown, the transmission of uplink radio frame number i from the UE can start (N TA + N TA_offset ) x T s seconds earlier than the corresponding downlink radio frame in the UE (where 0 <= N TA <= 20412).

[0162] Here, for frame structure type 1, N TA_offset can correspond to '0', while for frame structure type 2, N TA_offset can correspond to '624'. In this case, not all time slots are transmitted in the radio frame. The example here can correspond to TDD. In this case, only a subset of the time slots in the radio frame can be transmitted.

[0163] 4. Timing

[0164] Figure 10 An example is shown schematically illustrating the relationship between downlink timing and sidelink timing.

[0165] As Figure 10 shown, the transmission of sidelink radio frame number i from the UE can start (N TA,SL + N TA_offset ) x T s seconds earlier than the corresponding timing reference frame in the UE (where 0 <= N TA <= 20412).

[0166] The UE may not need to receive sidelink or downlink transmission earlier than 624T s after the sidelink transmission is completed.

[0167] In the case where the UE has a serving cell that satisfies the S-criterion,

[0168] - The timing of reference radio frame i can be the same as the downlink radio frame i in the same frame.

[0169] - A specific value corresponding to N TA_offset can be given.

[0170] In other cases,

[0171] - The timing of reference radio frame i can be inherently obtained by a predetermined method.

[0172] - N TA_offset = 0

[0173] The amount of N TA,SL between the channel and the signal can be as follows.

[0174] [Equation 1]

[0175]

[0176] II. Disclosure of this specification

[0177] The following disclosure in this specification can be implemented in one or more combinations (e.g., combinations including at least one of the following). Each drawing shows each disclosed embodiment, but the embodiments of the drawings can be implemented in combination with each other.

[0178] The description of the method presented in the disclosure of this specification can consist of a combination of one or more of the following operations / configurations / steps. The following methods can be executed or used in combination or complementarily.

[0179] For reference, in the disclosure of this specification, sidelink (SL), V2X, and V2X sidelink (SL) can be used with the same meaning.

[0180] The disclosure of this specification describes a method by which a terminal can perform efficient V2X communication. For example, the disclosure of this specification describes a method by which a terminal capable of simultaneously performing NR V2X sidelink transmission and NR uplink (UL) transmission can perform efficient V2X communication.

[0181] For example, hereinafter, a method will be described in which adjacent channels within the same licensed operating frequency band (e.g., TDD licensed frequency band) are respectively allocated as NR Uu (e.g., NR UL and / or NR DL) and NR SL (sidelink), and in which the UE will simultaneously transmit an NR UL signal and an NR SL signal. Additionally, the UE capabilities, Tx (transmission) timing, and / or power settings related to a terminal that simultaneously performs NR V2X sidelink transmission and NR uplink (UL) transmission are described hereinafter.

[0182] When using TDD, for the UE, the UL-DL configuration can be basically configured. Based on the UL-DL configuration, the UE can know the UL time slots and DL time slots configured in the TDD operating frequency band. In the same TDD licensed operating frequency band, the UE can perform NR SL communication only in the time slots set as UL (e.g., UL time slots). In order for the UE to perform NR SL communication only in the UL time slots, the network (e.g., base station) must always configure the NR SL resource allocation to be possible only in the UL time slots. For example, the network (e.g., base station) can provide the UE with configuration information that the NR SL resource allocation is possible only in the UL time slots. The setting / application of the NR SL resources by the terminal itself may be restricted. For example, the UE cannot allocate NR SL resources to time slots other than the UL time slots.

[0183] A terminal using a TDD operating band can transmit an NR SL signal only when the UE transmits a UL signal in a time slot allocated (or set) for NR UL. In other words, when transmitting a UL signal in a time slot allocated (or set) for NR UL, a terminal using a TDD operating band can transmit only an NR SL signal. Additionally, when the UE does not transmit a UL signal in a time slot allocated (or configured) for NR UL, the UE can perform both transmission and reception via SL. For example, in a time slot allocated (or set) for NR UL, when the terminal does not transmit a UL signal, the terminal can transmit an SL signal or receive an SL signal.

[0184] The UE can determine the timing for transmitting the UL signal based on the DL reception timing, based on the timing advance (TA) and N TA_offset For example, when the UE transmits an NR UL signal, the UE can transmit the UL signal earlier than the DL reception timing considering the TA (timing advance) and N TA_offset For example, as described in the reference Figure 9 The UE can transmit the UL signal at a time advanced by a value based on the TA (timing advance) and N TA_offset from the DL reception timing (e.g., the start time of DL radio frame i).

[0185] For reference, the standards related to N TA_offset are defined as an example in Table 4 below.

[0186] [Table 4]

[0187]

[0188] The example in Table 4 shows the value of N TA_offset In the example of Table 4, T c can mean a basic time unit.

[0189] In Table 4, Note 1 can mean the following. The UE (e.g., the UE) can identify N TA_offset based on information related to the TA offset (e.g., n-TimingAdvanceOffset). The UE can receive information related to the TA offset (e.g., n-TimingAdvanceOffset) from the base station. When the terminal does not receive information related to the TA offset (e.g., n-TimingAdvanceOffset), the N TA_offsetThe default value is set to 25600. For multiple UL carriers within the same timing advance group (TAG), the UE may expect that for all UL carriers, the information related to the TA offset (e.g., n-TimingAdvanceOffset) is provided with the same value, and for FDD serving cells, the N TA_offset value is provided as 39936.

[0190] Meanwhile, when the UE transmits an NR SL signal, the UE may determine the transmission timing of the NRSL signal based on a synchronization reference (e.g., a synchronization reference source).

[0191] In the following, examples of the terminal determining the transmission timing of the NR SL signal will be described.

[0192] For example, when the NR cell is a synchronization reference (e.g., a synchronization reference source), the SL timing advance (TA) and N can be determined as in the following example TA_offset .

[0193] A detailed description of the case where the NR cell is a synchronization reference source is as follows.

[0194] When the reference timing for SL transmission in a non-V2X sidelink carrier is the NR serving cell, the following description applies. It is possible to perform sidelink transmission from the time point of the first detected time path of the downlink frame received from the reference cell (i.e., the NR cell serving as the synchronization reference source) at a time before (N TA,SL +N TA_offset )*T c . Here, N TA_offset =0, and N TA,SL =0. For reference, N TA,SL can be the SL TA.

[0195] Referring to the above examples of determining the transmission timing of the UL signal and the example of determining the transmission timing of the SL signal, it is not allowed to perform NR UL transmission and NR SL transmission simultaneously in the conventional standard. For example, the TA (timing advance) (N TA ) for the transmission timing of the UL signal and N TA_offset have different values from the SL TA (N TA_offset ) and N TA,SL for the transmission timing of the SL signal. Therefore, the NR UL transmission timing and the NR SL transmission timing based on the DL transmission timing are different from each other.

[0196] Through the following examples, it will be described in detail that it is not allowed to perform NR UL transmission and NR SL transmission simultaneously in the conventional standard.

[0197] For example, assume that the DL reception timing (propagation delay) is based on a case where the gNB is 30 us in a FR1 TDD cell with a cell radius of 9 km.

[0198] i) An example in the FR1 TDD band without the LTE-NR coexistence scenario is as follows. N for determining the UL transmission time can be determined as in the following example TA and N TA_offset . N TA = 2 * propagation delay = 2 * 30 us = 60 us. N TA_offset = 25600 * T c = 13 us. Since the UL transmission time is N TA + N TA_offset , it can be 60 us + 13 us = 73 us. That is, based on the DL transmission timing, the UL transmission can start before 73 us. At the same time, since the SL transmission time is N TA_offset = 0 and N TA,SL = 0, it can be N TA,SL + N TA_offset = 0 us. In summary, the UL transmission starts before 73 us based on the DL transmission timing, but the SL transmission can start before 0 us. That is, conventionally, the NR UL transmission and the NR SL transmission cannot start simultaneously.

[0199] ii) An example in the FR1 TDD band with the LTE-NR coexistence scenario is as follows. N for determining the UL transmission time can be determined as in the following example TA and N TA_offset . N TA = 2 * propagation delay = 2 * 30 us = 60 us. N TA_offset = 39936 * T c = 20 us. Since the UL transmission time is N TA + N TA_offset , it can be 60 us + 20 us = 80 us. That is, based on the DL transmission timing, the UL transmission can start before 80 us. At the same time, since the SL transmission time is N TA_offset = 0 and N TA,SL = 0, it can be N TA,SL + N TA_offse = 0 us. In summary, the UL transmission starts before 73 us based on the DL transmission timing, but the SL transmission can start before 0 us. That is, conventionally, the NR UL transmission and the NR SL transmission cannot start simultaneously.

[0200] In the two examples of i) and ii) above, the SL transmission time starts before '0 us' based on the DL reception time, but the UL transmission time starts before 73 us and 80 us respectively based on the DL reception time. That is, according to the prior art, the SL transmission time and the UL transmission time start at different time points.

[0201] The disclosure of this specification presents examples of radio frequency (RF) structures for terminals capable of simultaneously performing SL transmission and UL transmission. According to the examples of the RF structures presented in the disclosure of this specification, the UE can start SL transmission and UL transmission at the same time point, or can start SL transmission and UL transmission at different time points. For example, depending on the RF structure of the terminal, it can be determined whether the terminal supports SL transmission and UL transmission at different times.

[0202] The following Figures 11 to 14 are examples of the RF structures of the terminals presented in the disclosure of this specification. The transceiver of the terminal can include the RF structure of the terminal described in the Figures 11 to 1 example.

[0203] ​ The example of

[0204] ​ shows an example of RF structure type 1 of the terminal. RF structure type 1 can include separate basebands (BBs) for NR UL transmission and NR SL transmission. RF structure type 1 can include a single phase-locked loop (PLL), a single power amplifier (PA), and a single antenna for NR UL transmission and NR SL transmission.

[0205] ​ The example of

[0206] ​ shows an example of RF structure type 2 of the terminal. RF structure type 2 can include separate basebands (BBs) and separate PLLs for NR UL transmission and NR SL transmission. RF structure type 2 can include a single PA and a single antenna for NR UL transmission and NR SL transmission.

[0207] The following drawings are created to illustrate specific examples of this specification. Since the names of specific devices or the names of specific signals / messages / fields described in the drawings are presented by way of examples, the technical features of this specification are not limited to the specific names used in the following drawings.

[0208] ​ An example of the RF structure type 1 of a terminal according to the disclosure of this specification is shown.

[0209] ​ The example of... shows an example of the RF structure type 1 (separate BB (baseband) + single PLL + single PA + single antenna) of a terminal. The RF structure type 1 may include a separate baseband (BB) for NR UL transmission and NR SL transmission. The RF structure type 1 may include a single PLL, a single PA, and a single antenna for NR UL transmission and NR SL transmission.

[0210] In ​ the example of ​ may mean a combiner. ​ may mean an oscillator. ​ may mean a digital-to-analog converter. ​ may mean a mixer. BB may be the baseband. The RF filter may be, for example, a band-pass filter. The descriptions related to the combiner, oscillator, digital-to-analog converter, mixer, baseband, and RF filter may be equally applicable to ​ the example of

[0211] A UE having the RF structure type 1 cannot support different transmission reference times for NR UL and NR SL due to one phase-locked loop (PLL). Additionally, it cannot support both UL power control and SL power control due to a single power amplifier (PA).

[0212] This is because the phase-locked loop (PLL) functions to adjust the signal transmission timing. Since the UE uses one PLL to perform NR UL transmission and NR SL transmission, the UE having the type 1 structure cannot support the NR UL transmission reference time and the NR SL transmission reference time being different from each other.

[0213] Additionally, the PA can be used for power control. Since the UE uses one PA to perform NR UL transmission and NR SL transmission, the UE cannot control the power for NR UL transmission and the power for NR SL transmission separately.

[0214] As a method for a UE having the RF structure type 1 to support simultaneous transmission of NR UL and NR SL, the disclosure of this specification proposes to use N for NR SL TA_offset and N TA,SLSet to be the same as NR Uu. In other words, the transmission timing of the NRSL signal can be set to be the same as the transmission timing of the NR UL signal. For example, it can be set as in the following example for N TA_offset and N TA,SL :

[0215] - N of NR SL TA_offset = N of NR UL TA_offset ; and

[0216] - N TA,SL = N TA .

[0217] Then, a UE with RF structure type 1 can start NR SL transmission at the same timing as NR UL transmission.

[0218] For power control of a terminal with RF structure type 1, it is proposed to apply UL-based power control (e.g., (UL-based closed-loop power control)) to both UL and SL. The power control of a terminal with RF structure type 1 is as follows:

[0219] - NR UL power: Power setting based on UL closed-loop power control; and

[0220] - NR SL power: Power setting based on UL closed-loop power control.

[0221] Then, a UE with RF structure type 1 can set (or control) the power for transmitting the NR SL signal to be the same as the power for transmitting the NR UL signal.

[0222] The following drawings are created to illustrate specific examples of this specification. Since the names of specific devices described in the drawings or the names of specific signals / messages / fields are presented by way of example, the technical features of this specification are not limited to the specific names used in the following drawings.

[0223] ​ Shows an example of RF structure type 2 of a terminal according to the disclosure of this specification.

[0224] ​ The example of... shows an example of RF structure type 2 (separate BB (baseband) + separate PLL + single PA + single antenna) of a terminal. RF structure type 2 can include a separate baseband (BB) and a separate PLL for NR UL transmission and NR SL transmission. RF structure type 2 can include a single PA and a single antenna for NR UL transmission and NR SL transmission.

[0225] Since a terminal with an RF structure type 2 includes separate phase-locked loops (PLLs) for each of NR UL and NR SL, the terminal is capable of supporting different transmission reference times for NR UL and NR SL. That is, even if the transmission timings of NR UL signals and NR SL signals are different from each other, a terminal with an RF structure type 2 can perform NR UL transmission and NR SL transmission simultaneously. At the same time, a terminal with an RF structure type 2 cannot support both UL power control and SL power control due to one power amplifier (PA).

[0226] Since the UE uses one PA to perform NR UL transmission and NR SL transmission, the UE cannot control the power for NR UL transmission and the power for NR SL transmission separately.

[0227] As a method for a terminal with an RF structure type 2 to support simultaneous transmission of NR UL and NR SL, the disclosure of this specification proposes that the terminal independently sets the transmission timings of NR UL signals and NR SL signals. For example, a terminal with an RF structure type 2 determines the transmission timing of NR UL signals based on the currently defined N TA_offset and N TA,SL for NR UL, and the terminal can determine the transmission timing of NR SL signals based on the N TA_offset and N TA for NR SL. A terminal with an RF structure type 2 can start NR SL transmission independently of the timing of NR UL transmission.

[0228] For the power control of a terminal with an RF structure type 2, it is proposed to apply UL-based power control (e.g., (UL-based closed-loop power control)) to both UL and SL. The power control of a terminal with an RF structure type 2 is as follows:

[0229] - NR UL power: Power setting based on UL closed-loop power control; and

[0230] - NR SL power: Power setting based on UL closed-loop power control.

[0231] Then, a terminal with an RF structure type 2 can set (or control) the power for transmitting NR SL signals to be the same as the power for transmitting NR UL signals.

[0232] The following drawings are created to illustrate specific examples of this specification. Since the names of specific devices or the names of specific signals / messages / fields described in the drawings are presented by way of example, the technical features of this specification are not limited to the specific names used in the following drawings.

[0233] ​ Shows an example of the RF structure type 3 of the terminal according to the disclosure of the present specification.

[0234] ​ The example shows an example of the RF structure type 3 of the terminal (separate BB (baseband) + separate PLL + separate PA + single antenna). The RF structure type 3 may include a separate baseband (BB), a separate PLL, and a separate PA for NR UL transmission and NR SL transmission. The RF structure type 3 may include a single antenna for NR UL transmission and NR SL transmission.

[0235] Since the terminal with the RF structure type 3 includes a separate phase-locked loop (PLL) for each of NR UL and NR SL, the terminal is capable of supporting different transmission reference times for NR UL and NR SL. That is, even if the transmission timing of the NR UL signal and the transmission timing of the NR SL signal are different from each other, the terminal with the RF structure type 3 can perform NR UL transmission and NR SL transmission simultaneously. At the same time, the terminal with the RF structure type 3 may support both UL power control and SL power control due to the separate power amplifiers (PAs) for NR UL and NR SL respectively.

[0236] As a method for the terminal with the RF structure type 3 to support the simultaneous transmission of NR UL and NR SL, the disclosure of the present specification proposes that the terminal independently sets the transmission timing of the NR UL signal and the transmission timing of the NR SL signal. For example, the terminal with the RF structure type 3 determines the transmission timing of the NR UL signal based on the currently defined N TA_offset and N TA of NR UL, and the terminal can determine the transmission timing of the NR SL signal based on the N TA_offset and N TA,SL of NR SL. The terminal with the RF structure type 3 can start the NR SL transmission at a timing independent of the NR UL transmission.

[0237] For the power control of the terminal with the RF structure type 3, it is proposed to apply UL-based power control (e.g., (closed-loop power control based on UL)) to UL respectively, and apply SL open-loop power control to SL. The power control of the terminal with the RF structure type 3 is as follows:

[0238] - NR UL power: Power setting based on UL closed-loop power control; and

[0239] - NR SL power: Power setting based on SL open-loop power control.

[0240] Then, a terminal having an RF structure type 3 can set (or control) the power for transmitting an NR SL signal independently of the power for transmitting an NR UL signal.

[0241] Examples of open-loop power control applied to a terminal having an RF structure type 3 for transmitting an NR SL signal will be described in detail as follows.

[0242] As an example, the terminal can apply open-loop power control to the power for transmitting an NR SL signal using the'sl-P0-PSSCH-PSCCH' signaling information. For example, when the'sl-P0-PSSCH-PSCCH' signaling information is configured for the terminal, the terminal can determine the NR SL transmission power by applying open-loop power control based on the DL path loss and additionally the SL path loss. When the'sl-P0-PSSCH-PSCCH' signaling information is not configured for the terminal, the terminal does not consider the SL path loss and can determine the NR SL transmission power by applying open-loop power control based on the DL path loss. The'sl-P0-PSSCH-PSCCH' can mean the transmission power values of the PSSCH and PSCCH informed by the network (e.g., base station) to the terminal.

[0243] As another example, the terminal can always apply open power control to the power for transmitting an NR SL signal based on the DL path loss. The reason is that considering that the transmission and reception of the SL signal are only possible in the time slots allocated for NR UL, it is because it may not be guaranteed that the terminal obtains the actual SL path loss information from neighboring terminals using the same frequency band.

[0244] For reference, an example of the currently defined SL power control related equation is as shown in Equation 2 below.

[0245] [Equation 2]

[0246] P PSSCH (i) = min(P CMAX , P MAX，CBR , min(P PSSCH，D (i), P PSSCH，SL (i)))[dBm]

[0247] In Equation 2, P PSSCH,SL (i) can be set as in the following example.

[0248] - If p0-SL-PSCCHPSSCH and alpha-SL-PSCCHPSSCH are provided

[0249]

[0250] Otherwise

[0251] -P PSSCH (i) = min(P CMAX , P PSSCH，D (i)) [dBm]

[0252] Here, P PSSCH (i) may mean the NR SL transmission power. P CMAX may mean the maximum transmission power that can be set in the NR SL terminal. P MAX,CBR may mean the transmission power determined considering the PSSCH transmission power priority and the CBR (Channel Busy Ratio) region. P PSSCH,D (i) may mean the transmission power determined by applying power control based on the DL path loss. P PSSCH,SL (i) may mean the transmission power determined by applying power control based on the SL path loss. alphaSL-PSCCHPSSCH may mean the path loss ratio reflected in the power control. M PSSCH RB (i) may mean the number of RBs for PSSCH transmission. α SL is α if alphaSL-PSCCHPSSCH is provided, SL α = alphaSL-PSCCHPSSCH, if alphaSL-PSCCHPSSCH is not provided, it may mean α SL = 1. PL SL may mean the path loss of the SL.

[0253] For reference, in Equation 2, PL SL can be defined as PL SL = referenceSignalPower – higher layer filtered RSRP. The referenceSignalPower can be obtained from the PSSCH transmission power for each RE for each antenna port of the terminal. Here, the referenceSignalPower may be the higher layer filtered transmission power using the filter settings (e.g., the filter settings provided by filterCoeffient-SL) in the PSSCH transmission occasion. The higher layer filtered RSRP may be the RSRP reported by the terminal that receives the PSCCH-PSSCH transmission. The higher layer filtered RSRP can be obtained from the PSSCH DM-RS using the filter settings (e.g., the filter settings provided by filterCoeffient-SL).

[0254] For reference, when a terminal determines the NR SL transmission power and the NR UL transmission power, there may be a limit on the total transmission power that is the sum of the NR SL transmission power and the NR UL transmission power. Alternatively, when a terminal determines the NR SL transmission power and the NR UL transmission power, there may be a limit on the NR SL transmission power and a limit on the NR UL transmission power, respectively. According to these two cases (e.g., when there is a limit on the total transmission power that is the sum of the SL transmission power and the NR UL transmission power, and when there are a limit on the SL transmission power and a limit on the NR UL transmission power, respectively), the method for the terminal to configure the NR SL transmission power and the NR UL transmission power may vary.

[0255] For example, when there are a limit on the SL transmission power and a limit on the NR UL transmission power, respectively, the terminal may determine the NR SL transmission power and the NR UL transmission power in the above manner.

[0256] As another example, if there is a limit on the total transmission power that is the sum of the SL transmission power and the NR UL transmission power, the terminal may determine the NR SL transmission power and the NR UL transmission power as in the following example. The terminal may determine the NR SL transmission power and the NR UL transmission power based on the NR UL packet priority and / or the NR SL packet priority. For reference, in the following description, the base station may send the NR UL packet priority information and / or the NR SL packet priority information to the terminal. Alternatively, the terminal may store the NR UL packet priority information and / or the NR SL packet priority information in advance.

[0257] A specific example is as follows:

[0258] a) When the NR UL packet priority > the NR SL packet priority,

[0259] -1: NR UL power setting (based on closed-loop power control). The terminal may set the NR UL transmission power based on the UL closed-loop power control.

[0260] -2a: When the total allowed power - the NR UL power > 0, the terminal may determine the NR SL transmission power based on the following equation. For example, the terminal may set the NR SL power to NR SL power = min{total allowed power - NR UL power, NR SL open-loop control power}. Here, the NR SL open-loop control power may mean the SL power determined according to the above power setting based on the SL open-loop power control.

[0261] -2b: When the total allowed power - the NR UL power ≤ 0, the terminal may discard the NR SL transmission.

[0262] b) When the NR SL packet priority > NR UL packet priority,

[0263] -1: NR SL power setting (based on open-loop power control). The terminal can set the NR SL transmission power based on the SL open-loop power control.

[0264] -2a: When the total allowed power - NR SL power > 0, the terminal can determine the NR UL transmission power based on the following equation. For example, the terminal can set the NR UL power to NR UL power = min{total allowed power - NR SL power, NR UL closed-loop control power}. Here, the NR UL closed-loop control power can mean the UL power determined according to the above power setting based on UL closed-loop power control.

[0265] -2b: When the total allowed power - NR SL power ≤ 0, the terminal can discard the NR UL transmission.

[0266] c) When the NR SL packet priority = NR UL packet priority, the terminal can arbitrarily select one of the examples in a) or b) above to determine the NR SL transmission power and the NR UL transmission power.

[0267] d) When neither the information related to the NR SL packet priority nor the information related to the NR UL packet priority is sent to the terminal, or when the terminal does not know the NR SL packet priority and the NR UL packet priority, the terminal can determine the NR SL transmission power and the NR UL transmission power by arbitrarily selecting one of the examples in a) or b) above.

[0268] e) When the terminal only receives the information related to the NR SL packet priority and fails to receive the information related to the NR UL packet priority, or when the terminal only has the information related to the NR SL packet priority and does not have the information related to the NR UL packet priority, the terminal can check whether the NR SL packet priority has a priority corresponding to'safety'. For example, when the priority value corresponding to'safety' is '7', if the NR SL packet priority value set to PPP (ProSe per-packet priority) is equal to or greater than '7', or if the NR SL packet priority value set to PPP is greater than or equal to '7' - Δ (e.g., Δ = {1, 2, 3}), then the NR SL packet priority value set to PPP can be assumed to have a priority equivalent to'safety'. When the NR SL packet priority is the priority corresponding to'safety', the terminal can perform the same operations as in "b)" above. For example, the terminal can perform operations such as "b)" as in the following example:

[0269] -1: NR SL Power Setting (Based on Open-Loop Power Control). The terminal can set the NR SL transmission power based on SL open-loop power control.

[0270] -2a: When Total Allowed Power - NR SL Power > 0, the terminal can determine the NR UL transmission power based on the following equation. For example, the terminal can set the NR UL power to NR UL Power = min{Total Allowed Power - NR SL Power, NR UL Closed-Loop Control Power}. Here, the NR UL Closed-Loop Control Power can mean the UL power determined according to the above power setting based on UL closed-loop power control.

[0271] -2b: When Total Allowed Power - NR SL Power ≤ 0, the terminal can discard the NR UL transmission.

[0272] When the NR SL packet priority is not according to the priority of'safety', the terminal can perform an operation such as the above "c)" (for example, the terminal can determine the NR SL transmission power and the NR UL transmission power by arbitrarily selecting one of the above examples a) or b)).

[0273] The following drawings are created to illustrate specific examples of this specification. Since the names of specific devices described in the drawings or the names of specific signals / messages / fields are presented by way of example, the technical features of this specification are not limited to the specific names used in the following drawings.

[0274] ​ An example of the RF structure type 4 of the terminal according to the disclosure of this specification is shown.

[0275] ​ The example of shows an example of the RF structure type 4 of the terminal (separate BB (Baseband) + separate PLL + separate PA + separate antenna). The RF structure type 4 can include a separate baseband (BB), a separate PLL, a separate PA, and a separate antenna for NR UL transmission and NR SL transmission.

[0276] Since the terminal with RF structure type 4 includes a separate phase-locked loop (PLL) for each of NR UL and NR SL, the terminal is capable of supporting different transmission reference times for NR UL and NR SL. That is, even if the transmission timing of the NR UL signal and the transmission timing of the NR SL signal are different from each other, the terminal with RF structure type 4 can perform NR UL transmission and NR SL transmission simultaneously. At the same time, the terminal with RF structure type 4 may support both UL power control and SL power control due to separate power amplifiers (PAs) for NR UL and NR SL respectively.

[0277] For reference, a terminal with an RF structure type 4 is the same as the terminal with an RF structure type 3 described in the example above ​ , and the terminal can independently set the transmission timing of the NR UL signal and the transmission timing of the NR SL signal. Similarly, a terminal with an RF structure type 4 is the same as the terminal with an RF structure type 3 described in the example above for reference ​ , and the terminal can determine the power for transmitting the NR SL signal and the power for transmitting the NR UL signal.

[0278] As a method for a terminal with an RF structure type 4 to support simultaneous transmission of NR UL and NR SL, the disclosure of this specification proposes that the terminal independently sets the transmission timing of the NR UL signal and the transmission timing of the NR SL signal. For example, a terminal with an RF structure type 4 determines the transmission timing of the NR UL signal based on the currently defined N TA_offset and N TA of NR UL, and the terminal can determine the transmission timing of the NR SL signal based on the N TA_offset and N TA,SL of NR SL. A terminal with an RF structure type 4 can start NR SL transmission at a timing independent of the timing of NR UL transmission.

[0279] For the power control of a terminal with an RF structure type 4, it is proposed to apply UL standard power control (e.g., (closed-loop power control based on UL)) to UL respectively and apply SL open-loop power control to SL. The power control of a terminal with an RF structure type 4 is as follows:

[0280] - NR UL power: Power setting based on UL closed-loop power control; and

[0281] - NR SL power: Power setting based on SL open-loop power control.

[0282] Then, a terminal with an RF structure type 4 can set (or control) the power for transmitting the NR SL signal independently of the power for transmitting the NR UL signal.

[0283] Examples of the open-loop power control applied to a terminal with an RF structure type 4 to transmit the NR SL signal will be described in detail as follows.

[0284] As an example, the terminal can use the'sl-P0-PSSCH-PSCCH' signaling information to apply open-loop power control to the power for transmitting the NR SL signal. For example, when the'sl-P0-PSSCH-PSCCH' signaling information is configured for the terminal, the terminal can determine the NR SL transmission power by applying open-loop power control based on the DL path loss and additionally the SL path loss. If the'sl-P0-PSSCH-PSCCH' signaling information is not configured for the terminal, the terminal does not consider the SL path loss and can determine the NR SL transmission power by applying open-loop power control based on the DL path loss.

[0285] As another example, the terminal can always apply open power control to the power for transmitting the NR SL signal based on the DL path loss. The reason is that considering that the transmission and reception of the SL signal are only possible in the time slots allocated for NR UL, because it may not be guaranteed that the terminal obtains the actual SL path loss information from neighboring terminals using the same frequency band.

[0286] For reference, an example of the currently defined SL power control related equation is the same as Equation 2 above.

[0287] For reference, when the terminal determines the NR SL transmission power and the NR UL transmission power, there may be a limit on the total transmission power that is the sum of the NR SL transmission power and the NR UL transmission power. Alternatively, when the terminal determines the NR SL transmission power and the NR UL transmission power, there may be a limit on the NR SL transmission power and a limit on the NR UL transmission power respectively. According to these two cases (for example, when there is a limit on the total transmission power that is the sum of the SL transmission power and the NR UL transmission power, and when there are a limit on the SL transmission power and a limit on the NR UL transmission power respectively), the method for configuring the NR SL transmission power and the NR UL transmission power for the terminal may vary.

[0288] For example, when there are a limit on the SL transmission power and a limit on the NR UL transmission power respectively, the terminal can determine the NR SL transmission power and the NR UL transmission power in the above manner.

[0289] As another example, if there is a limit on the total transmission power that is the sum of the SL transmission power and the NR UL transmission power, the terminal can determine the NR SL transmission power and the NR UL transmission power as in the following example. The terminal can determine the NR SL transmission power and the NR UL transmission power based on the NR UL packet priority and / or the NR SL packet priority.

[0290] A specific example is as follows:

[0291] a) When the NR UL packet priority > the NR SL packet priority,

[0292] -1: NR UL power setting (based on closed-loop power control). The terminal can set the NR UL transmission power based on UL closed-loop power control.

[0293] -2a: When the total allowable power - NR UL power > 0, the terminal can determine the NR SL transmission power based on the following equation. For example, the terminal can set the NR SL power to NR SL power = min{total allowable power - NR UL power, NR SL open-loop control power}. Here, the NR SL open-loop control power can mean the SL power determined according to the power setting based on the above SL open-loop power control.

[0294] -2b: When the total allowable power - NR UL power ≤ 0, the terminal can discard the NR SL transmission.

[0295] b) When the NR SL packet priority > the NR UL packet priority,

[0296] -1: NR SL power setting (based on open-loop power control). The terminal can set the NR SL transmission power based on SL open-loop power control.

[0297] -2a: When the total allowable power - NR SL power > 0, the terminal can determine the NR UL transmission power based on the following equation. For example, the terminal can set the NR UL power to NR UL power = min{total allowable power - NR SL power, NR UL closed-loop control power). Here, the NR UL closed-loop control power can refer to the UL power determined according to the power setting based on the above UL closed-loop power control.

[0298] -2b: When the total allowable power - NR SL power ≤ 0, the terminal can discard the NR UL transmission.

[0299] c) When the NR SL packet priority = the NR UL packet priority, the terminal can arbitrarily select one of the examples in a) or b) above to determine the NR SL transmission power and the NR UL transmission power.

[0300] d) When neither the information related to the NR SL packet priority nor the information related to the NR UL packet priority is sent to the terminal, or when the terminal does not know the NR SL packet priority and the NR UL packet priority, the terminal can determine the NR SL transmission power and the NR UL transmission power by arbitrarily selecting one of the examples in a) or b) above.

[0301] e) When the terminal only receives information related to the NR SL packet priority and fails to receive information related to the NR UL packet priority, or when the terminal only has information related to the NR SL packet priority and does not have information related to the NR UL packet priority, the terminal can check whether the NR SL packet priority has a priority corresponding to'safety'. When the NR SL packet priority is the priority corresponding to'safety', the terminal can perform the same operations as in the above "b)". For example, when the priority value corresponding to'safety' is '7', if the NR SL packet priority value set to PPP (ProSe per-packet priority) is equal to or greater than '7', or if the NR SL packet priority value set to PPP is greater than or equal to '7'-Δ (e.g., Δ = {1, 2, 3}), the NR SL packet priority value set to PPP can be assumed to have a priority equivalent to'safety'. For example, the terminal can perform operations such as "b)" as in the following example:

[0302] -1: NR SL power setting (based on open-loop power control). The terminal can set the NR SL transmission power based on the SL open-loop power control.

[0303] -2a: When the total allowed power - NR SL power > 0, the terminal can determine the NR UL transmission power based on the following equation. For example, the terminal can set the NR UL power to NR UL power = min{total allowed power - NR SL power, NR UL closed-loop control power). Here, the NR UL closed-loop control power can refer to the UL power determined according to the above power setting based on the UL closed-loop power control.

[0304] -2b: When the total allowed power - NR SL power ≤ 0, the terminal can discard the NR UL transmission.

[0305] When the NR SL packet priority is not the priority according to'safety', the terminal can perform operations such as the above "c)" (e.g., the terminal can determine the NR SL transmission power and the NR UL transmission power by arbitrarily selecting one of the examples of a) or b) above).

[0306] The RF structure type 4 of the terminal includes separate antennas for NR UL transmission and NR SL transmission. Compared with the RF structure type 3 including a single antenna, the RF structure type 4 of the terminal may have a small reverse intermodulation effect that may occur due to the simultaneous transmission of NR UL signals and NR SL signals. Here, the reverse intermodulation effect may be in a form that occurs in an RF structure with two PAs. For example, when the NR UL signal flows through the PA for NR UL and into the PA for NR SL, a reverse intermodulation effect may occur. Taking the opposite case as an example, when the NR SL signal flows through the PA for NR SL and into the PA for NR UL, a reverse intermodulation effect may occur. Compared with the RF structure type 3 including a single antenna, since the isolation between antennas (e.g., 10 dB isolation) is additionally considered, type 4 may have a smaller reverse intermodulation effect than the RF structure type 3. For this reason, the MPR (Maximum Output Power Reduction) and / or A-MPR (Additional Maximum Output Power Reduction) applied to the RF structure type 4 of the terminal can be set to be less than the MPR and / or A-MPR applied to the RF structure types 1 to 3 of the terminal.

[0307] As described in the example above ​ , the terminal can differently determine the NR UL transmission timing and the NR SL transmission timing according to the RF structure types 1 to 4 of the terminal. Additionally, according to the RF structure types 1 to 4 of the terminal, the terminal can differently set (or determine) the NR UL transmission power and the NR SL transmission power. Additionally, depending on the components included in the RF structure of the terminal (e.g., a single PLL, separate PLLs, a single PA, separate PAs, a single antenna, separate antennas, etc.), the terminal can differently determine the NR UL transmission timing and the NR SL transmission timing. Additionally, depending on the components included in the RF structure of the terminal (e.g., a single PLL, separate PLLs, a single PA, separate PAs, a single antenna, separate antennas, etc.), the terminal can differently set (or determine) the NR UL transmission power and the NR SL transmission power.

[0308] Therefore, it may be necessary to distinguish terminals that can simultaneously transmit NR UL signals and NR SL signals. For example, it may be necessary to distinguish which type among the RF structure types 1 to 4 the terminal corresponds to. Another example is that it may be necessary to distinguish the components included in the RF structure of the terminal (e.g., a single PLL, separate PLLs, a single PA, separate PAs, a single antenna, separate antennas, etc.).

[0309] For this classification, signaling for capabilities and the capabilities of the terminal can be defined.

[0310] For example, capabilities and capability signaling can be proposed for distinguishing each of RF structure type 1, RF structure type 2, RF structure type 3, and RF structure type 4.

[0311] Alternatively, capabilities and capability signaling can be proposed for distinguishing RF structure type 1 and RF structure types 2 / 3 / 4. For example, a terminal having RF structure type 1 sets the transmission timing of an NR SL signal to be the same as the transmission timing of an NR UL signal. On the other hand, terminals having RF structure types 2 to 4 can independently set the transmission timing of the NR UL signal and the transmission timing of the NR SL signal. Therefore, in order to distinguish RF structure type 1 and the remaining RF structure types (types 2 to 4), capabilities and capability signaling can be defined.

[0312] Alternatively, in order to distinguish components included in the RF structure of a terminal (e.g., a single PLL, separate PLLs, a single PA, separate PAs, a single antenna, separate antennas, etc.), capabilities and capability signaling can be defined. For example, separate (or distinct) time support capabilities (e.g., whether it includes separate PLLs), separate (or distinct) PA support capabilities, and separate (or distinct) antenna support capabilities can be defined. For reference, these capabilities and capability signaling can be defined independently of each other. Alternatively, each capability and capability signaling can be defined in a combined form.

[0313] In the following, ​ an example shows an example in which a terminal transmits capability information to a base station.

[0314] The following drawings are created to illustrate specific examples of this specification. Since the names of specific devices described in the drawings or the names of specific signals / messages / fields are presented by way of example, the technical features of this specification are not limited to the specific names used in the following drawings.

[0315] ​ An example of capability signaling according to the disclosure of this specification is shown.

[0316] Referring to ​ , an example of capability signaling according to the disclosure of this specification is shown. ​ The example of the capability signaling of

[0317] A base station (e.g., a gNB or an eNB, etc.) can send a terminal capability inquiry message to a terminal (e.g., the terminal). The terminal capability inquiry message sent by the base station can be a message for inquiring which RF structure type the terminal includes or which components are included in the terminal's RF structure.

[0318] The terminal can send capability information to the base station. The capability information can include capability information for distinguishing each of RF structure type 1, RF structure type 2, RF structure type 3, and RF structure type 4. The capability information can include capability information for distinguishing RF structure type 1 and RF structure type 2 / 3 / 4. The capability information can include capability information for distinguishing components (e.g., a single PLL, a split PLL, a single PA, a split PA, a single antenna, a split antenna, etc.) included in the terminal's RF structure. When receiving the terminal capability inquiry message, the terminal can send the capability information to the base station. Or, the step of the base station sending the terminal capability inquiry message can be omitted, and the terminal can send the capability information to the base station even without receiving the terminal capability inquiry message.

[0319] After the terminal sends the capability information for classifying the RF structure type of the terminal to the network (e.g., the base station), the network (e.g., the base station) can perform subsequent scheduling operations according to the capability information. Here, the capability information for distinguishing the RF structure type of the terminal can be the capability information for distinguishing each of RF structure type 1, RF structure type 2, RF structure type 3, and RF structure type 4. Or, the capability information for distinguishing the RF structure type of the terminal can be the capability information for distinguishing RF structure type 1 and RF structure type 2 / 3 / 4. For example, the terminal and / or the network (e.g., the base station) can perform the following operations.

[0320] When the terminal is a terminal with RF structure type 1, the network and / or the terminal can perform operations as in the following examples:

[0321] a-1) The network can set the NR SL reference timing (e.g., the synchronization reference source) of the terminal to the gNB. And, the network and / or the terminal can synchronize the NR SL transmission timing with the NR UL Tx timing.

[0322] a-2) If the network sets the NR SL reference timing (e.g., the synchronization reference source) of the terminal to the Global Navigation Satellite System (GNSS) or a neighboring NR SL terminal, the following operations can be performed:

[0323] - The network can set the priority of NR UL higher than that of NR SL. By setting the priority of NR UL higher than that of NR SL, the terminal can perform NR SL transmissions according to the NR UL Tx timing regardless of the NR SL reference timing. Alternatively, when the NR UL priority is set higher than the NR SL priority, the terminal can discard NR SL transmissions.

[0324] - The network can set the priority of NR SL higher than that of NR UL. In this case, the terminal can perform NR SL transmissions based on the reference timing and discard NR UL transmissions.

[0325] b) The terminal can apply UL power control equally to the power control of NR SL. For example, the terminal can set (or control) the power used to transmit NR SL signals to be the same as the power used to transmit NR UL signals.

[0326] When the terminal is a terminal with RF structure type 2, the network and / or the terminal can operate as in the following examples:

[0327] a) The network can set the NR SL reference timing (e.g., synchronization reference source) of the terminal to one of gNB, GNSS, or an adjacent NR SL terminal. And, the network and / or the terminal can independently set the NR SL transmission timing and the NR UL Tx timing.

[0328] b) The terminal can apply UL power control equally to the power control of NR SL. For example, the terminal can set (or control) the power used to transmit NR SL signals to be the same as the power used to transmit NR UL signals. When the NR UL transmission timing and the NR SL transmission timing of the terminal are not synchronized, the network can set the NR UL priority and the NR SL priority for power control. The network can inform the terminal of the priority of NR UL and the priority of NR SL. When the priority of NR UL and the priority of NR SL are set, the terminal can perform power control for NR SL as in the following examples:

[0329] - When the priority of NR UL is higher than the priority of NR SL, the terminal can set (or control) the power used to transmit NR SL signals to be the same as the power used to transmit NR UL signals based on the NR UL slot boundary.

[0330] - When the priority of NR SL is higher than the priority of NR UL, the terminal can set (or control) the power used to transmit NR SL signals to be the same as the power used to transmit NR UL signals based on the NR SL slot boundary.

[0331] - When the priority of NR UL is the same as that of NR SL, the terminal can set (or control) the power for transmitting NR SL signals to be the same as the power for transmitting NR UL signals based on the NR UL time slot boundary.

[0332] - If no priority is set, the terminal can set (or control) the power for transmitting NR SL signals to be the power for transmitting NR UL signals based on the NR UL time slot boundary.

[0333] When the terminal is a terminal with RF structure type 3, the network and / or the terminal can perform operations as in the following examples:

[0334] a) The network can set the NR SL reference timing (e.g., synchronization reference source) of the terminal to one of gNB, GNSS, or an adjacent NR SL terminal. Also, the network and / or the terminal can independently set the NR SL transmission timing and the NR UL Tx timing.

[0335] b) The terminal can set (or control) the power for transmitting NR SL signals independently of the power for transmitting NR UL signals. Or, as described in the example above in ​ , the terminal can perform NR SL power control.

[0336] When the terminal is a terminal with RF structure type 4, the network and / or the terminal can perform operations as in the following examples:

[0337] a) The network can set the NR SL reference timing (e.g., synchronization reference source) of the terminal to one of gNB, GNSS, or an adjacent NR SL terminal. Also, the network and / or the terminal can independently set the NR SL transmission timing and the NR UL Tx timing.

[0338] b) The terminal can set (or control) the power for transmitting NR SL signals independently of the power for transmitting NR UL signals. Or, as described in the example above in ​ , NR SL power control can be performed.

[0339] After the terminal sends capability information to the network (e.g., base station) to distinguish the components included in the RF structure of the terminal (e.g., a single PLL, separate PLLs, a single PA, separate PAs, a single antenna, separate antennas, etc.), the network (e.g., base station) can perform subsequent scheduling operations according to the capability information. Here, the capability information can include separate (or distinct) time support capabilities (e.g., whether it includes separate PLLs), separate (or distinct) PA support capabilities, and separate (or distinct) antenna support capabilities.

[0340] When the terminal sends information on separate (or distinct) time support capabilities (e.g., whether it includes a separate PLL) to the network, the network and / or the terminal can perform operations such as the following examples:

[0341] a) When the terminal supports separate synchronization of NR UL transmission timing and NR SL transmission timing (e.g., when the terminal is capable of independently setting NR UL transmission timing and NR SL transmission timing), the network can schedule NR UL and NR SL based on the separate synchronization. Additionally, the network can configure the gNB, GNSS, or an adjacent NR SL terminal as the NR SL timing reference (e.g., synchronization reference source).

[0342] b-1) When the terminal does not support separate synchronization of NR UL transmission timing and NR SL transmission timing (e.g., when the terminal synchronizes NR SL transmission timing with NR UL transmission timing), the network can set the NR SL reference timing to the gNB and synchronize NR SL transmission with the NR UL Tx timing.

[0343] b-2) When the terminal does not support separate synchronization of NR UL transmission timing and NR SL transmission timing (e.g., when the terminal synchronizes NR SL transmission timing with NR UL transmission timing), the network can configure GNSS or an adjacent NR SL terminal as the NR SL reference timing. In this case:

[0344] - The network can set the priority of NR UL to be higher than that of NR SL. By setting the priority of NR UL to be higher than that of NR SL, the terminal can perform NR SL transmission according to the NR UL Tx timing regardless of the NR SL reference timing. Alternatively, the terminal can discard the NR SL transmission.

[0345] - The network can set the priority of NR SL to be higher than that of NR UL. In this case, the terminal can perform NR SL transmission based on the reference timing and discard the NR UL transmission.

[0346] When the terminal sends information on separate (or distinct) PA support capabilities to the network, the network and / or the terminal can perform operations as in the following examples:

[0347] a) When the terminal supports separate (or distinct) PAs for each of NR UL and NR SL, the terminal can perform UL power control and SL power control separately. For example, the terminal can set (or control) the power for transmitting NR SL signals independently of the power for transmitting NR UL signals.

[0348] b) If the terminal does not support separate (or distinct) PAs for each of NR UL and NR SL, the terminal may apply UL power control equally to SL power control. For example, the terminal may perform SL power control as described in the examples above in ​ 's example and ​ 's example.

[0349] When the terminal sends separate (or distinct) antenna support capability information to the network, the network and / or the terminal may perform operations as in the following examples:

[0350] a) When the terminal supports separate (or distinct) antennas for each of NR UL and NR SL, the terminal may perform UL power control and SL power control separately. For example, the terminal may set (or control) the power for transmitting NR SL signals independently of the power for transmitting NR UL signals.

[0351] b) If the terminal does not support separate (or distinct) antennas for each of NR UL and NR SL, the terminal may apply UL power control equally to SL power control. For example, the terminal may perform SL power control as described in the example above in ​ 's example.

[0352] When the terminal sends separate (or distinct) time support capability (e.g., whether it includes a separate PLL) information and separate (or distinct) PA support capability information to the network, the network and / or the terminal may perform operations such as the following examples:

[0353] 1) If the terminal supports separate synchronization of NR UL transmission timing and NR SL transmission timing (e.g., when the terminal can set NR UL transmission timing and NR SL transmission timing independently), when the terminal supports separate (or distinct) PAs for each of NR UL and NR SL, the network and / or the terminal may perform operations as in the following examples. For reference, in this case, the network and / or the terminal may perform the same operations as when the terminal has RF structure type 3 or RF structure type 4:

[0354] 1-a) The network may set the NR SL reference timing (e.g., synchronization reference source) of the terminal to one of gNB, GNSS, or an adjacent NR SL terminal. And, the network and / or the terminal may set NR SL transmission timing and NR UL Tx timing independently.

[0355] 1-b) The terminal may set (or control) the power for transmitting NR SL signals independently of the power for transmitting NR UL signals. Or, as ​ or ​As previously described in the example, the terminal can perform NR SL power control.

[0356] 2) If the terminal supports separate synchronization of NR UL transmission timing and NR SL transmission timing (e.g., when the terminal can independently set NR UL transmission timing and NR SL transmission timing), and if the terminal does not support separate (or distinct) PAs for each of NR UL and NR SL, the network and / or the terminal can perform operations as in the following examples. For reference, in this case, the network and / or the terminal can perform the same operations as when the terminal has RF structure type 2:

[0357] 2-a) The network can set the NR SL reference timing (e.g., synchronization reference source) of the terminal to one of gNB, GNSS, or an adjacent NR SL terminal. Also, the network and / or the terminal can independently set NR SL transmission timing and NR UL Tx timing.

[0358] 2-b) The terminal can apply UL power control equally to the power control of NR SL. For example, the terminal can set (or control) the power for transmitting NR SL signals to be the same as the power for transmitting NR UL signals. When the NR UL transmission timing and NR SL transmission timing of the terminal are not synchronized, the network can set NR UL priority and NR SL priority for power control. The network can inform the terminal of the priority of NR UL and the priority of NR SL. When the priority of NR UL and the priority of NR SL are set, the terminal can perform power control for NR SL as in the following examples:

[0359] - When the priority of NR UL is higher than the priority of NR SL, the terminal can set (or control) the power for transmitting NR SL signals to be the same as the power for transmitting NR UL signals based on the NR UL slot boundary.

[0360] - When the priority of NR SL is higher than the priority of NR UL, the terminal can set (or control) the power for transmitting NR SL signals to be the same as the power for transmitting NR UL signals based on the NR SL slot boundary.

[0361] - When the priority of NR UL is the same as the priority of NR SL, the terminal can set (or control) the power for transmitting NR SL signals to be the same as the power for transmitting NR UL signals based on the NR UL slot boundary.

[0362] - If the priority is not set, the terminal may set (or control) the power for transmitting the NR SL signal to the power for transmitting the NR UL signal based on the NR UL slot boundary.

[0363] 2) If the terminal does not support separate synchronization of NR UL transmission timing and NR SL transmission timing (e.g., when the terminal cannot independently set the NR UL transmission timing and the NR SL transmission timing), and the terminal does not support separate (or individual) PAs for each of NR UL and NR SL, the network and / or the terminal may perform operations as in the following examples. For reference, in this case, the network and / or the terminal may perform the same operations as when the terminal has RF structure type 1:

[0364] 3-a-1) The network may set the NR SL reference timing (e.g., synchronization reference source) of the terminal to the gNB. And, the network and / or the terminal may synchronize the NR SL transmission timing with the NR UL Tx timing.

[0365] 3-a-2) If the network sets the NR SL reference timing (e.g., synchronization reference source) of the terminal to GNSS or a neighboring NR SL terminal, the following operations may be performed:

[0366] - The network may set the priority of NR UL to be higher than the priority of NR SL. By setting the priority of NR UL to be higher than the priority of NR SL, the terminal may perform NR SL transmission based on the NR UL Tx timing regardless of the NR SL reference timing. Alternatively, when the NR UL priority is set to be higher than the NR SL priority, the terminal may discard the NR SL transmission.

[0367] - The network may set the priority of NR SL to be higher than the priority of NR UL. In this case, the terminal may perform NR SL transmission based on the reference timing and discard the NR UL transmission.

[0368] 3-b) The terminal may apply UL power control equally to the power control of NR SL. For example, the terminal may set (or control) the power for transmitting the NR SL signal to be the same as the power for transmitting the NR UL signal.

[0369] When the terminal sends separate (or distinct) time support capability information (e.g., whether it includes a separate PLL) and separate (or distinct) antenna support capability information to the network, the network and / or the terminal may perform operations such as the following examples:

[0370] 1) If the terminal supports separate synchronization of NR UL transmission timing and NR SL transmission timing (e.g., when the terminal is capable of independently setting NR UL transmission timing and NR SL transmission timing), and if the terminal supports separate (or distinct) antennas for each of NR UL and NR SL, the network and / or the terminal may perform the same operations as when the terminal has RF structure type 4 (e.g., the same operations as when the aforementioned terminal supports separate (or distinct) PAs for each of NR UL and NR SL):

[0371] 2) If the terminal supports separate synchronization of NR UL transmission timing and NR SL transmission timing (e.g., when the terminal is capable of independently setting NR UL transmission timing and NR SL transmission timing), and if the terminal does not support separate (or distinct) antennas for each of NR UL and NR SL, the network and / or the terminal may perform the same operations as in the case of RF structure type 2 (e.g., when the aforementioned terminal does not support separate (or distinct) PAs for each of NR UL and NR SL) or the same operations as in the case of type 3 (e.g., when the aforementioned terminal supports separate (or distinct) PAs for each of NR UL and NR SL).

[0372] 3) If the terminal does not support separate synchronization of NR UL transmission timing and NR SL transmission timing (e.g., when the terminal is not capable of independently setting NR UL transmission timing and NR SL transmission timing), and if the terminal does not support separate (or distinct) antennas for each of NR UL and NR SL, the network and / or the terminal may perform the same operations as in the case of having RF structure type 1 (e.g., when the aforementioned terminal does not support separate (or distinct) PAs for each of NR UL and NR SL).

[0373] On the other hand, since the SL time synchronization for the transmission of SL signals of a terminal supporting RF structure type 1 is different from that of a terminal supporting RF structure type 2 / 3 / 4, SL communication between a terminal supporting RF structure type 1 and a terminal supporting RF structure type 2 / 3 / 4 may not be possible. On the other hand, a terminal supporting RF structure type 2, a terminal supporting RF structure type 3, and a terminal supporting RF structure type 4 may have the same SL time synchronization. Therefore, SL communication between a terminal supporting RF structure type 2, a terminal supporting RF structure type 3, and a terminal supporting RF structure type 4 may not be restricted. Thus, there may be a restriction in the SL communication between a terminal supporting RF structure type 1 and a terminal supporting RF structure type 2 / 3 / 4. To address such restricted SL communication, the disclosure of this specification proposes methods such as the following examples:

[0374] a) The disclosure of this specification proposes a method of excluding terminals supporting RF structure type 1 from terminals performing SL communication. Then, there is no restriction on SL communication between terminals supporting RF structure type 2, terminals supporting RF structure type 3, and terminals supporting RF structure type 4, and SL communication between terminals supporting various RF structure types can be effectively performed.

[0375] b) A method for unifying the timing application standard for SL communication (e.g., N TA_offset , N SL,TA ) in the licensed band is proposed. For example, the same value of N TA_offset and N SL,TA can be applied to all of the terminals supporting RF structure type 1, terminals supporting RF structure type 2, terminals supporting RF structure type 3, and terminals supporting RF structure type 4. Also, in the disclosure of this specification, the terminal sets the gNB in the licensed band with the highest-priority NR SL reference timing (e.g., synchronization reference source), and it is proposed to apply the same value of N TA_offset and N SL,TA . For example, the priority of the NR SL reference timing (e.g., synchronization reference source) can be applied as "gNB > SyncRefUE directly based on the gNB synchronization source > SyncRefUE indirectly based on the gNB synchronization source > GNSS > SyncRefUE directly based on the GNSS synchronization source > SyncRefUE indirectly based on the GNSS synchronization source > SyncRefUE with the lowest priority". In the case where the terminal simultaneously transmits an NR UL signal and an NR SL signal in the licensed band, it may not be possible to guarantee SL communication between a UE whose NR SL reference timing (e.g., synchronization reference source) is GNSS and a reference source (gNB or SyncRefUE) with a different NR SL reference timing (e.g., synchronization reference source). For example, UE1 can transmit according to the gNB timing, while UE2 can receive according to the GNSS timing. In this case, if the signal of terminal UE1 is received outside the CP length based on the reception timing reference of terminal UE2, terminal UE2 may not be able to detect the signal of UE1.

[0376] The following drawings are created to explain specific examples of this specification. Since the names of specific devices or the names of specific signals / messages / fields described in the drawings are presented by way of example, the technical features of this specification are not limited to the specific names used in the following drawings.

[0377] ​ Shows an example of the operation of a terminal according to an embodiment disclosed in this specification.

[0378] ​ The operations of the terminal shown are merely examples, and the scope of disclosure of this specification is not limited by ​ the content shown. For example, the terminal can perform ​ operations not shown in. As an example, the terminal can perform the above operations in various examples disclosed in this specification.

[0379] In ​ the example of, the terminal can be a terminal capable of simultaneously transmitting NR signals and SL signals.

[0380] In step S1601, the terminal can determine the transmission power. For example, the UE can determine the transmission power for SL transmission based on the capability information. In addition, the UE can determine the transmission power for UL transmission. The UE can determine the transmission power for UL transmission based on the capability information. The UE can determine the transmission power for SL transmission in different ways according to the capability information. For the specific operations of the terminal, refer to the operations of determining the transmission power for SL transmission and / or the transmission power for UL transmission of the terminal described above through various examples.

[0381] Here, the capability information can be capability information related to SL transmission and UL transmission. For example, the capability information can be the capability information described above through various examples. For example, the capability information can include capability information related to RF structure type 1, RF structure type 2, RF structure type 3, and RF structure type 4. For example, the capability information can include (i) information on whether it is possible to independently determine the transmission timing for SL transmission and the transmission timing for UL transmission, (ii) whether it is possible to independently determine the transmission power for SL transmission and the transmission power for UL transmission, and / or (iii) information on whether a separate antenna is supported for SL transmission and UL transmission.

[0382] For reference, the terminal can send the capability information to the base station. For example, as in the above ​ example, the terminal can send the capability information to the base station. For example, as will be described later ​ in step S1701, the terminal can also send the capability information to the base station. The terminal can receive configuration information from the base station (for example, information for setting the transmission power of the terminal and / or information for setting the transmission timing of the terminal). The base station can send the configuration information to the terminal based on the capability information of the terminal. For the specific example in which the base station sends the configuration information to the terminal, reference will be made to the description of ​ step S1702 to be described later.

[0383] In step S1602, the terminal can determine the transmission timing. For example, the terminal can determine the transmission timing for SL transmission based on the capability information. In addition, the UE can determine the transmission timing for UL transmission. For example, the UE can determine the transmission timing for UL transmission based on the capability information. The UE can determine the transmission timing for SL transmission in different ways according to the capability information. For the specific operations of the terminal, refer to the operations of determining the transmission timing for SL transmission and / or UL transmission for the terminal described above through various examples.

[0384] In step S1603, the terminal can send a signal. The terminal can determine the signal based on the transmission power determined in step S1601 and the transmission timing determined in step S1602. For example, the UE can send an SL signal and a UL signal.

[0385] For the specific operations of the terminal, refer to the operations of determining the transmission power for SL transmission and / or the transmission power for UL transmission for the terminal described above through various examples.

[0386] The following drawings are created to explain specific examples of this specification. Since the names of specific devices or the names of specific signals / messages / fields described in the drawings are presented by way of example, the technical features of this specification are not limited to the specific names used in the following drawings.

[0387] ​ An example of the operations of a terminal and a base station according to the disclosed embodiments of this specification is shown.

[0388] ​ The operations of the terminal shown in are only examples, and the scope of disclosure of this specification is not limited by ​ what is shown in. For example, the terminal can perform ​ operations not shown. As an example, the terminal can perform the operations of the above terminal in various examples disclosed in this specification. For example, the base station can perform ​ operations not shown. For example, the base station can perform the operations of the network (e.g., base station) described in various examples disclosed in this specification.

[0389] In ​ the example of, the terminal (e.g., UE 1) can be a terminal capable of simultaneously performing the transmission of NR signals and the transmission of SL signals.

[0390] In step S1701, the terminal may send capability information to the base station. The capability information refers to the capability information described in the various examples disclosed in this specification. For example, the capability information may include capability information related to RF structure type 1, RF structure type 2, RF structure type 3, and RF structure type 4. For example, the capability information may include (i) information on whether it is possible to independently determine the transmission timing for SL transmission and the transmission timing for UL transmission, (ii) whether it is possible to independently determine the transmission power for SL transmission and the transmission power for UL transmission, and / or (iii) information on whether separate antennas are supported for SL transmission and UL transmission.

[0391] In step S1702, the base station may send configuration information to the terminal. Here, the configuration information may be information generated based on the capability information sent by the terminal. For example, the configuration information may include information for setting the transmission power of the terminal and / or information for setting the transmission timing of the terminal. For example, the configuration information may include the information used for setting the transmission power and / or the information used for setting the transmission timing of the terminal in the various examples described above ​ described.

[0392] As a reference, steps S1701 and S1702 may be selectively executed. For example, steps S1701 and S1702 may not be executed. As another example, step S1701 may be executed and step S1702 may not be executed. In another example, step S1702 may be executed and step S1701 may not be executed.

[0393] In step S1703, the terminal may determine the transmission power. Step S1703 may be executed in the same manner as ​ step S1601. As a reference, when step S1702 is executed, the terminal may determine the transmission power based on the capability information and / or the configuration information.

[0394] In step S1704, the terminal may determine the transmission timing. Step S1703 may be executed in the same manner as ​ step S1602. As a reference, when step S1702 is executed, the terminal may determine the transmission timing based on the capability information and / or the configuration information.

[0395] In step S1705, the terminal may send a signal. The terminal may determine the SL signal and the UL signal based on the transmission power determined in step S1703 and the transmission timing determined in step S1704.

[0396] As described in the disclosure of this specification, the terminal can efficiently perform sidelink (or V2X) communication and / or NR Uu communication. For example, in the disclosure of this specification, various examples of the RF structure type of a terminal capable of simultaneously performing NR SL signal transmission and NR UL signal transmission have been defined. Accordingly, depending on the RF structure type of the terminal, the terminal and / or the base station can enable the terminal to efficiently perform sidelink (or V2X) communication and / or NR Uu communication. In addition, by sending the capability information related to SL transmission and UL transmission to the base station, the base station can check the RF structure type of the terminal and / or the capabilities of the terminal. The base station can provide configuration information (e.g., scheduling information, information related to the transmission power of the terminal, etc.) to the terminal based on the capability information of the terminal. By doing so, the terminal can efficiently perform sidelink (or V2X) communication and / or NR Uu communication. The network (e.g., the base station) and / or the terminal can enable the terminal to effectively determine the transmission power for SL transmission and the transmission timing for SL transmission.

[0397] For reference, the operations of the UE described in this disclosure can be performed by ​ the devices shown. For example, the UE can be ​ the first wireless device 100 or the second wireless device 200 shown. For example, the operations of the UE described in the present invention can be processed by one or more processors 102 or 202. The operations of the UE described in the present invention can be stored in one or more memories 104 or 204 in the form of instructions / programs executable by one or more processors 102 or 202 (e.g., instructions, executable code, etc.). One or more processors 102 or 202 can control one or more memories 104 or 204 and one or more transceivers 105 or 206, and can perform the operations of the UE described in this disclosure by executing the instructions / programs stored in one or more memories 104 or 204.

[0398] In addition, the instructions for performing the operations of the UE described in this disclosure can be stored in a non-volatile computer-readable storage medium. The storage medium can be included in one or more memories 104 or 204. In addition, the instructions stored in the storage medium can be executed by one or more processors 102 or 202, and the operations of the UE described in this disclosure can be performed.

[0399] For reference, the operations of the BS (e.g., NG-RAN, gNB, gNB (NB-IoT), gNB (NR) eNB, RAN, etc.) described in this disclosure can be implemented by ​ the devices shown. For example, the BS (e.g., NG-RAN, gNB, gNB (NB-IoT), gNB (NR) eNB, RAN, etc.) can be ​The first wireless device 100a or the second wireless device 100b shown. For example, the operations of the BS (e.g., NG-RAN, gNB, gNB (NB-IoT), gNB (NR) eNB, RAN, etc.) described in the present disclosure can be processed by one or more processors 102 or 202. The operations of the UE described in the present disclosure can be stored in one or more memories 104 or 204 in the form of instructions / programs (e.g., instructions, executable code, etc.) executable by one or more processors 102 or 202. One or more processors 102 or 202 can control one or more memories 104 or 204 and one or more transceivers 105 or 206 and can perform the operations of the BS (e.g., NG-RAN, gNB, gNB (NB-IoT), gNB (NR) eNB, RAN, etc.) described in the present disclosure by executing the instructions / programs stored in one or more memories 104 or 204.

[0400] In addition, the instructions for performing the operations of the BS (e.g., NG-RAN, gNB, gNB (NB-IoT), gNB (NR) eNB, RAN, etc.) described in the present disclosure can be stored in a non-volatile (or non-transitory) computer-readable storage medium. The storage medium can be included in one or more memories 104 or 204. In addition, the instructions stored in the storage medium can be executed by one or more processors 102 or 202, and the operations of the BS described in the present disclosure (e.g., NG-RAN, gNB, gNB (NB-IoT), gNB (NR) eNB, RAN, etc.) can be performed.

[0401] So far, the preferred embodiments have been described in an exemplary manner. However, the disclosure of this specification is not limited to specific embodiments and can be modified, changed, or improved in various forms within the scope written in the inventive concept and the claims of the present disclosure.

[0402] In the above exemplary system, the method is described as a series of steps or blocks based on a flowchart. However, these methods are not limited to the order of the above steps, and a certain step can be executed in a different order or simultaneously. In addition, it should be understood that the steps shown in the flowchart are not mutually exclusive, but can include other steps, or one or more steps can be deleted without affecting the scope of those of ordinary skill in the art.

[0403] The claims in this specification can be combined in various ways. For example, the technical features in the method claims of this specification can be combined to be implemented or executed in a device, and the technical features in the device claims can be combined to be implemented or executed in a method. In addition, the technical features in the method claims and the device claims can be combined to be implemented or executed in a device. In addition, the technical features in the method claims and the device claims can be combined to be implemented or executed in a method.

Claims

1. A method for performing sidelink (SL) communication, the method being performed by a user equipment (UE) and comprising: Determining a transmission power for SL transmission based on the UE's capability information, wherein the UE's capability information is information about the UE's capabilities related to SL transmission and uplink (UL) transmission; Determining a transmission timing for the SL transmission based on the UE's capability information; and Transmitting an SL signal based on the transmission timing and the transmission power, wherein the SL signal is transmitted simultaneously with the UL signal, wherein the UE's capability information includes (i) information about whether the UE is capable of independently determining the transmission timing for the SL transmission and the transmission timing for the UL transmission, and / or (ii) information about whether the UE is capable of independently determining the transmission power for the SL transmission and the transmission power for the UL transmission.

2. The method according to claim 1, further comprising: Transmitting the UE's capability information to a base station.

3. The method according to claim 2, further comprising: Receiving scheduling information from the base station based on the UE's capability information, wherein, based on the transmission timing, the transmission power, and the scheduling information, the SL signal is transmitted.

4. The method according to claim 1, when the UE's capability information includes information that the UE is capable of independently determining the transmission timing for the SL transmission and the transmission timing for the UL transmission, the transmission timing for the SL transmission is determined independently of the transmission timing for the UL transmission.

5. The method according to claim 1, when the UE's capability information includes information that the UE is not capable of independently determining the transmission timing for the SL transmission and the transmission timing for the UL transmission, the transmission timing for the SL transmission is determined to be the same as the transmission timing for the UL transmission.

6. The method according to claim 1, when the UE's capability information includes information that the UE is capable of independently determining the transmission timing for the SL transmission and the transmission timing for the UL transmission, the transmission power for the SL transmission is determined independently of the transmission power for the UL transmission.

7. The method according to claim 1, when the UE's capability information includes information that the UE is not capable of independently determining the transmission power for the SL transmission and the transmission power for the UL transmission, the transmission power for the SL transmission is determined based on the same method as the transmission power for the UL transmission.

8. The method according to claim 1, Among them, the capability information further includes (iii) information about whether separate antennas are supported for the SL transmission and the UL transmission.

9. The method according to claim 1, Among them, The information on whether the UE can independently determine the transmission timing for the SL transmission and the transmission timing for the UL transmission includes information on whether the transceiver of the UE includes a single phase-locked loop (PLL) for the UL transmission and the SL transmission or separate PLLs.

10. The method according to claim 1, Among them, The information on whether the UE can independently determine the transmission power for the SL transmission and the transmission power for the UL transmission includes information on whether the transceiver of the UE includes a single power amplifier (PA) for the UL transmission and the SL transmission or separate PAs.

11. A user equipment (UE) for performing sidelink communication, comprising: At least one transceiver; At least one processor; And At least one memory for storing instructions and operably electrically connected to the at least one processor; Based on the execution of the instructions by the at least one processor, the operations performed include: Determining the transmission power for the SL transmission based on the UE's capability information, wherein the UE's capability information is information on the UE's capabilities related to SL transmission and uplink (UL) transmission; Determining the transmission timing for the SL transmission based on the UE's capability information; and Transmitting an SL signal based on the transmission timing and the transmission power, wherein the SL signal is transmitted simultaneously with the UL signal, wherein the UE's capability information includes (i) information on whether the UE can independently determine the transmission timing for the SL transmission and the transmission timing for the UL transmission, and / or (ii) information on whether the UE can independently determine the transmission power for the SL transmission and the transmission power for the UL transmission.

12. The UE according to claim 11, Among them, The UE is an autonomous driving device that communicates with at least one of a mobile terminal, a network, and an autonomous vehicle other than the UE.

13. A method for performing communication, the method being performed by a base station and comprising: Receiving the UE's capability information from a user equipment (UE), wherein the UE's capability information is information on the UE's capabilities related to SL transmission and uplink (UL) transmission; wherein the UE's capability information includes (i) information on whether the UE can independently determine the transmission timing for the SL transmission and the transmission timing for the UL transmission, and / or (ii) information on whether the UE can independently determine the transmission power for the SL transmission and the transmission power for the UL transmission; and Sending scheduling information to the UE based on the UE's capability information.

14. A method for performing sidelink (SL) communication, the method being performed by a user equipment (UE), and comprising: Determining the timing for the uplink transmission based on the timing advance offset for the uplink transmission; And Determine the timing for the sidelink transmission based on the timing advance offset for the sidelink transmission. Based on the uplink transmission and the sidelink transmission being performed in the same frequency band, the timing advance offset for the sidelink transmission is the same as the timing advance offset for the uplink transmission.

15. The method according to claim 14, Among them, The transmission power of the sidelink transmission and the transmission power of the uplink transmission are determined differently based on whether the uplink transmission and the sidelink transmission are performed at different times.

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