Apparatus and method for transmitting / receiving information in unlicensed band

Abstract

A first user device according to various embodiments includes a transceiver for transmitting and receiving a wireless signal, and a processor connected to the transceiver, the processor can be set to: receive first sidelink control information (SCI) from a second user device through a physical sidelink control channel (PSCCH) provided in an unlicensed band; receive second SCI from the second user device through a physical sidelink shared channel (PSSCH) determined based on the PSCCH, the first SCI and the second SCI being constituted by different formats from each other; identify information for performing sidelink communication with the second user device in the unlicensed band based on at least one of the first SCI and the second SCI; and receive data from the second user device through a sidelink communication path between the first user device and the second user device based on the identified information.

Description

Technical Field

[0001] The following description relates to devices and methods for transmitting and receiving information used in communications within licensed frequency bands. Background Technology

[0002] Since the first generation of mobile communication, which only transmitted and received voice signals, mobile communication has evolved to the current fifth generation (5G) mobile communication. The purpose of developing 5G mobile communication technology is to provide enhanced mobile broadband (eMBB) services, ultra-reliable and low latency communication (URLLC), and massive connectivity (machine-type communications, mMTC).

[0003] Currently, development is underway to improve system networks based on advanced small cells, cloud radio access networks (Cloud RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, coordinated multi-point (CoMP) transmission and reception, interference mitigation and elimination, and other technologies.

[0004] This 5G mobile communication technology, as a new radio access technology (RAT), is called New Radio (NR). NR can support vehicle-to-everything (V2X) communication (i.e., cellular V2X communication, C-V2X). V2X communication refers to communication between vehicles and other objects. V2X communication can include wired, wireless, or both, and various types of information can be exchanged through V2X communication. Cellular-based V2X communication can be called C-V2X. In particular, NR-based V2X communication can be called NR-V2X. Summary of the Invention

[0005] The problem the invention aims to solve

[0006] For cellular vehicle-to-everything (C-V2X) communication, the integrity of the communication connection (or URLLC) is currently being discussed, but a process for ensuring the amount of data sent (or received) is not defined. Therefore, a method for ensuring this may be needed.

[0007] The frequency bands used for C-V2X communication (i.e., licensed bands) and unlicensed bands are set separately. Most signal exchange in C-V2X communication occurs within the licensed bands, but communication errors or a sharp drop in reliability may occur due to external obstacles or other reasons. C-V2X communication is essentially communication between vehicles and objects, so signal reliability and low latency are likely essential.

[0008] Therefore, in this scenario, the use of unlicensed frequency bands in C-V2X communication may be necessary. The downlink control information (DCI) format is set within the unlicensed frequency band, but the sidelink control information (SCI) format is not. Therefore, to perform C-V2X communication on unlicensed frequency bands, additional information for using unlicensed frequency bands may be required in the SCI format.

[0009] The technical problems to be solved in this article are not limited to those described herein. Other unmentioned technical problems will be clearly understood by those skilled in the art through the following description.

[0010] means for solving problems

[0011] A first user equipment according to various embodiments includes: a transceiver for transmitting and receiving wireless signals; and a processor connected to the transceiver, the processor being configured to: receive first sidelink control information (SCI) from a second user equipment via a physical sidelink control channel (PSCCH) configured in an unlicensed frequency band; receive a second SCI from the second user equipment via a physical sidelink shared channel (PSSCH) determined based on the PSCCH, the first SCI and the second SCI being configured with different formats from each other; identify information for performing sidelink communication with the second user equipment in the unlicensed frequency band based on at least one of the first SCI and the second SCI; and receive data from the second user equipment via a sidelink communication path between the first user equipment and the second user equipment based on the identified information.

[0012] A second user equipment according to various embodiments includes: a transceiver for transmitting and receiving wireless signals; and a processor connected to the transceiver, the processor being configured to: determine information for performing sidelink communication with a first user equipment in the unlicensed frequency band; transmit first sidelink control information (SCI) to the first user equipment via a physical sidelink control channel (PSCCH) configured in the unlicensed frequency band; transmit a second SCI to the first user equipment via a physical sidelink shared channel (PSSCH) determined based on the PSCCH, the first SCI and the second SCI being configured with different formats from each other; and transmit data to the first user equipment via a sidelink communication path between the first user equipment and the second user equipment based on at least one of the first SCI and the second SCI.

[0013] A computer-readable storage medium according to various embodiments is used to store one or more programs, the programs including instructions for causing a first user device to perform the following actions: receiving first sidelink control information (SCI) from a second user device via a physical sidelink control channel (PSCCH) configured in an unlicensed frequency band; receiving a second SCI from the second user device via a physical sidelink shared channel (PSSCH) determined based on the PSCCH, the first SCI and the second SCI being configured in different formats; identifying information for performing sidelink communication with the second user device in the unlicensed frequency band based on at least one of the first SCI and the second SCI; and receiving data from the second user device via a sidelink communication path between the first user device and the second user device based on the identified information.

[0014] Invention Effects

[0015] According to various embodiments, unlicensed frequency bands can be used to achieve sidelink communication. Specifically, unlicensed frequency bands can be used when communication errors occur due to external obstacles or a sharp decline in reliability during sidelink communication performed via licensed frequency bands. Conversely, licensed frequency bands can also be used when reliability drops sharply during sidelink communication performed via unlicensed frequency bands.

[0016] According to various embodiments, information for performing sidelink communication on unlicensed frequency bands can be redefined and added.

[0017] According to one embodiment, by exchanging the newly defined information, a user equipment can confirm information related to channel access on an unlicensed frequency band.

[0018] According to one embodiment, by exchanging the newly defined information, a user device can confirm information used to request feedback on an unlicensed frequency band.

[0019] According to one embodiment, by exchanging the newly defined information, a user equipment can confirm information related to channel occupancy on unlicensed frequency bands.

[0020] According to the embodiments described, the transmission and reception of wireless signals can be performed efficiently in a wireless communication system.

[0021] The effects that can be obtained in this disclosure are not limited to those described above, and other unmentioned effects will be clearly understood by those skilled in the art to which this disclosure pertains through the following description. Attached Figure Description

[0022] Figure 1 This diagram illustrates the basic concept of mobile communication.

[0023] Figure 2 This is a diagram used to illustrate an example of sidelink communication in NR.

[0024] Figure 3 This is another example diagram used to describe sidelink communication in NR.

[0025] Figure 4 The frequency band plan for 5.9 GHz is shown.

[0026] Figure 5 An example of performing sidelink communication on an unlicensed frequency band is shown.

[0027] Figure 6 This illustrates another example of performing sidelink communication on an unlicensed frequency band.

[0028] Figure 7 Examples of the operation of a first user equipment according to various embodiments are shown.

[0029] Figure 8 Another example of the operation of a first user equipment according to various embodiments is shown.

[0030] Figure 9 This illustrates yet another example of the operation of a first user equipment according to various embodiments.

[0031] Figure 10 This illustrates yet another example of the operation of a first user equipment according to various embodiments.

[0032] Figure 11 An example of the operation of a second user equipment according to various embodiments is shown.

[0033] Figure 12 It is a simplified block diagram of a user equipment according to various embodiments.

[0034] Figure 13 Examples of user equipment according to various embodiments are shown.

[0035] Figure 14 Examples of functional configurations of user equipment according to various embodiments are shown.

[0036] Figure 15 Examples of gateways associated with user equipment are shown according to various embodiments. Detailed Implementation

[0037] Various embodiments of this document will be described below with reference to the accompanying drawings.

[0038] The various embodiments and terminology used in this document are not intended to limit the technology described herein to the specific embodiments, but should be understood to include various modifications, equivalents, and / or substitutions of the embodiments. Similar reference numerals may be used for similar parts in conjunction with the description of the accompanying drawings. Unless the context clearly specifies otherwise, a single type expression may include multiple type expressions. In this document, expressions such as “A or B,” “at least one of A and / or B,” “A, B, or C,” or “at least one of A, B, and / or C” may include all possible combinations of the items listed together. Expressions such as “first,” “second,” “first,” or “second” may modify corresponding elements without regard to order or importance, and are used only to distinguish one element from another, without limiting the components. When a component (e.g., a first) is referred to as “(functionally or communicatively) connected” or “coupled” to another component (e.g., a second), that component may be directly connected to that other component, or may be connected through another component (e.g., a third component).

[0039] As used herein, the term "module" includes a unit consisting of hardware, software, or firmware, and is used interchangeably with terms such as logic, logic block, component, or circuit. A module can be an integrally formed part or a minimum unit or part of one or more functions. For example, the module can be configured as an application-specific integrated circuit (ASIC).

[0040] Figure 1 This diagram illustrates the basic concept of mobile communication.

[0041] refer to Figure 1 The mobile communication system 100 may include a network for enabling electronic devices to communicate. The network can be configured in various ways. For example, the network may be configured with NR, Long Term Evolution (LTE), LTE-Advanced (LTE-A), or a wireless local area network (wireless LAN, e.g., Wi-Fi 802.11a / b / g / n / ac / ax / be), etc.

[0042] Electronic devices may include vehicles 101, 102, TV 103, and smartphones 104. Figure 1 The electronic devices shown (vehicle 101, vehicle 102, TV 103, and smartphone 104) are exemplary, and electronic devices can include a variety of devices. For example, electronic devices can include home appliances, servers, Internet of Things (IoT) devices, computers, laptops, etc.

[0043] Electronic devices can be referred to in different ways depending on the type of network. They can be called User Equipment (UE), Mobile Station, Subscriber Station, Wireless Terminal (or Device), etc.

[0044] Electronic devices can be connected to base station 110. Base station 110 may include various devices or nodes for wireless communication. For example, base station 110 may include transmit point (TP), transmit-receive point (TRP), enhanced base station (eNB), 5G base station (gNB), access point (AP), etc.

[0045] Coverage 111 can refer to the restricted area through which signals can be transmitted and received by base station 110. Figure 1The coverage area 111 shown is circular, but is not limited thereto. The coverage area 111 can be configured in various forms depending on various circumstances. Furthermore, the coverage area 111 is not limited to a two-dimensional region, but can also be configured as a three-dimensional space (e.g., a hemisphere or a sphere).

[0046] Electronic devices can send and receive control messages and user data via conventional communication and / or 5G communication. For example, control messages may include messages related to at least one of the electronic device's security control, bearer setup, authentication, registration, or mobility management. User data can refer to user data other than control messages sent and received between the electronic device and the core network (e.g., the Evolved Packet Core, EPC).

[0047] Electronic devices can communicate through base station 110, and electronic devices can connect to each other directly without going through a base station.

[0048] For example, vehicles 101 and 102 can be directly connected without going through base station 110. As another example, vehicles 101 and 102 can send and receive data via sidelink communication.

[0049] For example, TV 103 and smartphone 104 can send and receive data to each other via various wireless communications (e.g., Bluetooth or Wi-Fi) without going through base station 110.

[0050] Although shown Figure 1 The mobile communication system 100 is illustrated by an example of a configuration with a single base station 110, but is not limited thereto. The mobile communication system 100 can be configured to include multiple base stations, including base station 110. Each of the multiple base stations can connect to multiple electronic devices, and electronic devices connected to different base stations can communicate with each other.

[0051] According to one embodiment, a first electronic device connected to a first base station among multiple base stations may leave the coverage area of ​​the first base station. The first electronic device may leave the coverage area of ​​the first base station and enter the coverage area of ​​a second base station among the multiple base stations. The first electronic device may perform a handover process to disconnect from the first base station and establish a connection with the second base station. After the handover process is completed, the first electronic device can communicate through the second base station.

[0052] For ease of description, the base station will be referred to as a BS (base station) in the following text. Furthermore, electronic devices connected to the base station can be described as user equipment (UE).

[0053] Figure 2 This is a diagram used to illustrate an example of sidelink communication in NR.

[0054] refer to Figure 2 UE1 210 and UE2 220 can perform sidelink communication directly without going through BS200. UE1 210 and UE2 220 can be connected to BS200. In other words, UE1 210 and UE2 220 can be within the coverage area of ​​BS200.

[0055] According to one embodiment, UE1 210 and UE2 220 can receive information (or information about resource scheduling) from BS 200 regarding resources used for sidelink communication. Based on the information received from BS 200 regarding resources used for performing sidelink communication, UE1 210 and UE2 220 can identify the resources used for performing sidelink communication. Using the identified resources, UE1 210 and UE2 220 can perform sidelink communication.

[0056] Specifically, the BS 200 can transmit information about multiple resources in downlink control information (DCI) via the physical downlink control channel (PDCCH). A detailed description of DCI will be provided later.

[0057] Figure 3 This is another example diagram used to describe sidelink communication in NR.

[0058] refer to Figure 3 ,and Figure 2 The difference shown is that only UE1 210 can connect to BS 200, while UE2 220 can not connect to BS 200.

[0059] According to the embodiment, among UE1 210 and UE2 220, only UE1 210 can receive information about multiple resources (or about a resource pool) from BS 200. UE1 210 can select one resource element from the multiple resources and send a signal to UE2 220 through the selected resource. Furthermore, UE2 220 can identify the resource selected by UE1 210 and perform sidelink communication through the resource selected by UE1 210.

[0060] exist Figure 3 The illustration shows an embodiment where only UE1 210 is connected to BS 200, and UE2 220 receives information about multiple resources through BS 200 without being connected to BS 200. However, this embodiment can also be applied to other applications. Figure 2 The situation.

[0061] Specifically, UE1 210 sends Sidelink Control Information (SCI) to UE2 220 via the Physical Sidelink Control Channel (PSCCH), and based on the SCI, sends data to UE2 220 via the Physical Sidelink Shared Channel (PSSCH) to perform sidelink communication. A detailed description of the SCI will be provided later.

[0062] DCI and SCI may be described below.

[0063] First, an example of the DCI format can be described. The DCI format can be configured as shown in Table 1 below.

[0064] Table 1

[0065]

[0066] Referring to Table 1, DCI formats can include DCI format 0, DCI format 1, and DCI format 2.

[0067] DCI format 0 can include DCI format 0_0, DCI format 0_1, and DCI format 0_2. DCI format 0 can be used for the uplink.

[0068] DCI format 0_0 can be used to schedule PUSCHs within a single cell (or uplink (UL) cell). DCI format 0_1 ​​can be used to schedule more than one PUSCH within a single cell. DCI format 0_1 ​​can also be used to indicate downlink feedback information (DFI) for configured grant PUSCHs. Both DCI formats 0_0 and 0_1 can be used for eMBB.

[0069] DCI format 0_2 can be used for PUSCH scheduling in a cell. DCI format 0_2 can also be used for URLLC.

[0070] On the other hand, DCI format 0 in unlicensed bands (or, sharing spectrum) may also include information different from the information described above.

[0071] For example, DCI formats 0_0 and 0_1 may include indicators for representing the channel access type.

[0072] For example, in unlicensed bands, DCI format 0_1 ​​may include an indicator to indicate whether it is a downlink feedback indication (DFI) or an uplink license.

[0073] DCI format 1 can include DCI format 1_0, DCI format 1_1, and DCI format 1_2. DCI format 1 can be used for the downlink.

[0074] DCI format 1_0 can be used for PDSCH scheduling in a cell (or downlink (DL) cell). DCI format 1_1 can be used for PDSCH scheduling in a cell. DCI format 1_1 can also be used to trigger a one-time hybrid automatic repeat and request (HARQ)-acknowledgement (ACK) codebook feedback. Both DCI format 1_0 and DCI format 1_1 can be used for eMBB.

[0075] DCI format 1_2 can be used for PDSCH scheduling in a cell. DCI format 1_2 can also be used for URLLC.

[0076] On the other hand, in unlicensed frequency bands (or shared spectrum), DCI format 1 may also include information different from the information described above. For example, DCI formats 1_0 and 1_1 may include indicators for representing the channel access type.

[0077] DCI format 2 can include DCI format 2_0, DCI format 2_1, DCI format 2_2, DCI format 2_3, DCI format 2_4, DCI format 2_5, and DCI format 2_6. DCI format 2 can be used for special purposes.

[0078] DCI format 2_0 can be used to notify slot format, channel occupancy time (COT) duration, possible resource block (RB) sets, and search space set group switching.

[0079] For example, DCI format 2_0 may include a slot format indicator. The slot format indicator can indicate whether the symbol in the corresponding slot is DL, UL, or flexible.

[0080] On the other hand, in unlicensed frequency bands, DCI format 2_0 can be used in the same format. However, the information indicated by DCI format 2_0 may change. For example, DCI format 2_0 can indicate which frequency band a channel is occupied for each resource. In other words, DCI format 2_0 can include information indicating whether the corresponding channel is empty.

[0081] DCI format 2_1 can be used to notify the UE of one or more Physical Resource Blocks (PRBs) and OFDM symbols (one or more) that are assumed not to be transmitted according to their intentions. In other words, DCI format 2_1 can include information indicating that signals should not be obeyed in the corresponding time slot.

[0082] DCI format 2_2 can be used for transmitting Transmit Power Control (TPC) commands for the Physical Uplink Control Channel (PUCCH) and the Physical Uplink Shared Channel (PUSCH). That is, DCI format 2_2 can be used for uplink power control.

[0083] DCI format 2_3 can be used to transmit a set of TPC commands for the transmission of a sounding reference signal (SRS) by more than one UE. That is, DCI format 2_3 can be used for uplink power control.

[0084] DCI format 2_4 can be used to notify PRB(one or more) and OFDM symbols(one or more) used to cancel uplink transmissions. That is, DCI format 2_4 may include an uplink cancellation indicator.

[0085] DCI format 2_5 can be used to notify the availability of soft resources. In other words, DCI format 2_5 can include indicators for IAB node support.

[0086] DCI format 2_6 can be used to notify power-saving information outside the Discontinuous Reception (DRX) active time for more than one UE. In other words, DCI format 2_6 can include a DRX activation indicator.

[0087] DCI format 3 can include DCI format 3_0 and DCI format 3_1.

[0088] DCI format 3_0 can be used in a cell for NR side links.

[0089] DCI format 3_1 can be used in a cell for long-term evolution (LTE) sidelinks.

[0090] Examples of SCI format can be described below.

[0091] The aforementioned DCI refers to the control information sent by the BS to the UE through the Physical Downlink Control Channel (PDCCH). However, SCI can refer to the control information sent by the terminal to another terminal through the Physical Sidelink Control Channel (PSCCH). The transmission of the SCI can be performed in two steps, the specific actions of which will be described below.

[0092] The first UE can send a first SCI (e.g., a first-stage SCI) to the second UE via the PSCCH. The first SCI may include information for scheduling the PSCCH. Then, the first UE can send a second SCI.

[0093] The second SCI can be sent to the second UE via PSSCH. The second UE can identify the information used to schedule PSSCH based on the first SCI and decode the second SCI. For example, the second SCI can be piggybacked with data and sent to the second UE via PSSCH.

[0094] On the other hand, the first SCI sent via PSCCH can be used for scheduling the second SCI and PSSCH. The first SCI may include SCI format 1-A.

[0095] On the other hand, the second SCI sent via PSSCH can be used to send sidechain scheduling information. The second SCI may include SCI format 2-A and / or SCI format 2-B. SCI format 2-A and SCI format 2-B can be used for decoding PSSCH.

[0096] The frequency bands used in NR can be described below.

[0097] The frequency bands (or frequency ranges) used in NR can be divided into two categories: Category 1 and Category 2. The Category 1 frequency band can be called Frequency Range (FR) 1. The Category 2 frequency band can be called FR 2.

[0098] For example, the ranges of the first type of frequency band and the second type of frequency band can be configured as shown in Table 2.

[0099] Table 2

[0100] Frequency range specification Corresponding frequency range Subcarrier spacing (SCS) FR 1 450MHz-6000MHz 15, 30, 60kHz FR 2 24250MHz-52600MHz 60, 120, 240kHz

[0101] Referring to Table 2, FR 1 can be configured as a frequency band from 450MHz to 6000MHz. FR 2 can be configured as a frequency band from 24250MHz to 52600MHz. The specific frequency values ​​described in Table 2 are exemplary and can be changed.

[0102] Figure 4 The frequency band plan for 5.9 GHz is shown.

[0103] refer to Figure 4 The 5.9 GHz band can include both unlicensed and licensed bands. Figure 4 The specific frequency range shown can be set differently for each country and can be changed.

[0104] For example, 20 MHz of the frequency band from 5.905 GHz to 5.925 GHz is designated as a licensed band and can be used for V2X communication (or C-V2X communication). In addition to the 20 MHz licensed band, 10 MHz of the frequency band from 5.895 GHz to 5.905 GHz can also be configured as a licensed band.

[0105] For example, 45MHz of the spectrum from 5.850GHz to 5.895GHz can be used for wireless internet (e.g., 802.11p / bd).

[0106] Frequency bands below 5.850 GHz or above 5.925 GHz can be designated as unlicensed bands. Unlicensed bands can be used for various purposes, such as vehicle communication (e.g., autonomous driving). These unlicensed bands may be referred to as shared spectrum.

[0107] To achieve Cellular-V2X communication, the integrity of the communication connection (or UR LLC) is currently being discussed, but no process is defined for ensuring the amount of data sent (or received), so measures may be needed to ensure this.

[0108] According to various embodiments, the spectrum of the frequency bands and unlicensed frequency bands used for C-V2X communication are set separately, but in C-V2X communication, unlicensed frequency bands can be used to ensure the amount of data sent and received.

[0109] Therefore, various embodiments of using unlicensed frequency bands in C-V2X communication can be described in the following specification.

[0110] As mentioned above, while a DCI format is provided for communication in unlicensed frequency bands, an SCI format is not provided. Therefore, in order to perform C-V2X communication in unlicensed frequency bands, it is necessary to further include additional information in the SCI format. In the following, an embodiment in which additional information is included in the SCI format can be described for performing C-V2X communication in unlicensed frequency bands.

[0111] According to one embodiment, the SCI format (e.g., SCI format 1 or SCI format 2) may include information related to channel access. In other words, the SCI format may include an indicator for representing the channel access type. As shown in Table 3, an indicator for representing the channel access type can be set.

[0112] Table 3

[0113]

[0114] Referring to Table 3, the size of the information related to the channel access can be set based on the relevant upper-layer parameters (i.e., AccessConfigListDCI-1-1) set from the Radio Resource Control (RRC) signaling. AccessConfigListDCI-1-1 can refer to a combined list of cyclic prefix (CP) extensions and uplink channel access types. In other words, the size of the information related to the channel access (i.e., ChannelAccess-CPext) can be set to one to four bits.

[0115] According to one embodiment, the SCI format (e.g., SCI format 1 or SCI format 2) may include information for requesting feedback. In other words, the SCI format may include indicators for requesting feedback. As shown in Table 4, indicators for requesting feedback can be set.

[0116] Table 4

[0117]

[0118] Referring to Table 4, the size of the information used for requesting feedback (i.e., the downlink feedback information flag (DFI flag)) can be set to 1 bit. For example, the information used for requesting feedback can be set to a first value (e.g., 1) to indicate that feedback is requested or a second value (e.g., 0) to indicate that feedback is not requested.

[0119] According to one embodiment, the SCI format (e.g., SCI format 1 or SCI format 2) may include information about channel occupancy. In other words, the SCI format may include an indicator indicating whether the channel is occupied. As shown in Table 5, the indicator can be set to indicate whether the channel is occupied.

[0120] Table 5

[0121]

[0122] Referring to Table 5, when each condition is met, the SCI format may include an indication based on each condition.

[0123] For example, when the upper-layer parameters are configured as "availableRB-SetsToAddModList" via RRC signaling, AvailableRB set Indicators 1 to N1 can be included in the SCI format.

[0124] For example, when the upper-layer parameters are configured as “co-DurationsPerCellToAddModList” via RRC signaling, COT duration indicator 1 to N2 can be included in the SCI format.

[0125] For example, when the upper-layer parameters are configured as “switchTriggerToAddModList” via RRC signaling, the search space set group switching flags 1 to M can be included in the SCI format.

[0126] According to the described embodiment, the SCI format may include: information about channel access, information for requesting feedback, or information about channel occupancy. Since the SCI format consists of two formats, the information about channel access, the information for requesting feedback, or the information about channel occupancy can be included in one of the two SCI formats.

[0127] Therefore, at least one of the first SCI transmitted via PSCCH and the second SCI transmitted via PSSCH may include information about channel access, information for requesting feedback, or information about channel occupancy. For example, information about channel access, information for requesting feedback, or information about channel occupancy may be included only in the second SCI.

[0128] The transmitting UE and the receiving UE can confirm in advance via RRC signaling that the first SCI and the second SCI may include the aforementioned information (e.g., information about channel access, information for requesting feedback, or information about channel occupancy). In this case, the transmitting UE and the receiving UE can confirm that the first SCI and the second SCI include the aforementioned information via DCI including a simple index from the BS.

[0129] When the aforementioned information (e.g., information about channel access, information for requesting feedback, or information about channel occupancy) is included in at least one of the first SCI and the second SCI, the specific actions the UE takes to perform sidelink communication can be described below.

[0130] Figure 5 An example of performing sidelink communication on an unlicensed frequency band is shown.

[0131] Reference Figure 5 UE1 510 and UE2 520 can be located within the coverage area of ​​BS 500. BS 500 can perform Radio Resource Control (RRC) signaling with UE1 510. Based on the RRC signaling, UE1 510 can obtain (or receive) information related to the unlicensed frequency bands to be used (or available for use).

[0132] The RRC signaling can be executed in the RRC layer of BS 500 and UE1 510. The RRC layer can be used to control the radio resources of UE1 510 and BS 500. BS 500 and UE1 510 exchange RRC messages with each other, thereby controlling the configuration, reassembly and release of radio bearers.

[0133] Therefore, BS 500 can send information about unlicensed frequency bands to be used in UE1 510 in an RRC message. UE1 510 can receive information about unlicensed frequency bands from BS 500 via the RRC message.

[0134] According to one embodiment, in order to perform sidelink communication with UE2 520 in an unlicensed frequency band, UE1 510 can confirm whether UE2 520 can communicate in the unlicensed frequency band. UE1 510 and UE2 520 can exchange capability information related to communication in the unlicensed frequency band, thereby confirming that they can communicate in the unlicensed frequency band.

[0135] For example, UE1 510 can identify whether there is a UE (e.g., UE2 520) in its vicinity that can communicate with it through a sensing (or discovery) process. UE1 510 can identify UE2 520 and send an indicator to UE2 520 to indicate that unauthorized communication is permitted.

[0136] For example, UE1 510 can send capability information related to communication on unlicensed frequency bands to UE2 520. When UE2 520 can communicate on unlicensed frequency bands, UE2 520 can send capability information related to communication on unlicensed frequency bands to UE1 510.

[0137] According to one embodiment, UE1 510 can receive DCI related to an unlicensed frequency band from BS 500. The DCI may include information related to channels (or resources) within the unlicensed frequency band used for communication with UE2 520. For example, UE1 510 can receive information related to channels 1 to 7 within the unlicensed frequency band from BS 500.

[0138] Subsequently, UE1 510 can determine the channel for sidelink communication with UE2 520 based on channel-related information within the unlicensed frequency band. UE1 510 can send information related to the determined channel to UE2 520. UE1 510 and UE2 520 can perform communication within the unlicensed frequency band based on the determined channel. For example, UE1 510 can send a first SCI to UE2 520 via PSCCH. UE1 510 can send a second SCI to UE2 520 via PSSCH. At least one of the first SCI and the second SCI may include information related to the determined channel.

[0139] Figure 5 The illustration shows an embodiment in which UE1 510 receives information from BS 500 related to channels (or resources) in an unlicensed frequency band for communicating with UE2 520, and determines the channels in the unlicensed frequency band based on that information, but is not limited thereto. UE2 520 may also receive information from BS 500 related to channels (or resources) in an unlicensed frequency band, and determine the channels in the unlicensed frequency band based on that information.

[0140] Figure 6 These are other examples illustrating sidelink communication performed in unlicensed frequency bands.

[0141] Reference Figure 6Of UE1 610 and UE2 620, only UE1 610 can be located within the coverage area of ​​BS 600. In this case, UE1 610 can choose the channel (or resource) to perform sidelink communication and perform sidelink communication with UE2 620 through the selected channel.

[0142] exist Figure 6 The document describes an embodiment in which UE1 610 independently selects the resources to perform sidelink communication and performs sidelink communication with UE2 620 through the selected channel, but is not limited thereto. UE2 620, located outside the coverage area of ​​BS 600, can also independently select the resources to perform sidelink communication and perform sidelink communication with UE1 610 through the selected channel.

[0143] According to one embodiment, UE1 610 and UE2 620 can determine the conditions for initiating communication via an unlicensed frequency band. For example, if the reliability of communication between UE1 610 and UE2 620 within a licensed frequency band is below a specified value, communication can be performed in an unlicensed frequency band. Therefore, when UE1 610 performs communication with UE2 620 within a licensed frequency band, it can identify that the reliability of communication with UE2 620 within the licensed frequency band is below a specified value. Based on the identification that the reliability of communication with UE2 620 within the licensed frequency band is below the specified value, UE1 610 can request communication within the unlicensed frequency band from UE2 620. UE2 620 can respond (or permit) communication within the unlicensed frequency band with UE1 610 and can perform communication within the unlicensed frequency band (i.e., sidelink communication) with UE1 610.

[0144] Additionally, UE2 620 may request communication on unlicensed frequency bands from UE1 610 if the reliability of communication with UE1 610 is below a specified value.

[0145] The described embodiment is an example where, during communication between UE1 610 and UE2 620 on a licensed frequency band, UE1 610 changes its frequency band to an unlicensed frequency band. In contrast, the following description may depict an embodiment where, during communication between UE1 610 and UE2 620 on an unlicensed frequency band, the frequency band is changed to a licensed frequency band.

[0146] According to one embodiment, UE1 610 and UE2 620 can determine the conditions for initiating communication via a licensed frequency band. For example, if the reliability of communication between UE1 610 and UE2 620 in an unlicensed frequency band is lower than a specified value, communication can be performed in a licensed frequency band. Therefore, during communication between UE1 610 and UE2 620 in an unlicensed frequency band, it can identify that the reliability of communication with UE2 620 in the unlicensed frequency band is below a specified value. Based on the identification that the reliability of communication with UE2 620 in the unlicensed frequency band is below the specified value, UE1 610 can request communication in a licensed frequency band from UE2 620. UE2 620 can respond (or permit) communication in a licensed frequency band with UE1 610 and can perform communication in a licensed frequency band (i.e., sidelink communication) with UE1 610.

[0147] In the following description, an example of a first user equipment and a second user equipment using licensed and unlicensed frequency bands to send and receive data via sidelink communication will be described according to another embodiment.

[0148] For example, when the first user equipment and the second user equipment perform sidelink communication, low-capacity data below the threshold is sent and received through licensed frequency bands, while high-capacity data exceeding the threshold can be sent and received through unlicensed frequency bands.

[0149] For example, when the first user equipment and the second user equipment perform sidelink communication, data with high reliability is transmitted and received through licensed frequency bands, while data with slightly lower reliability can be transmitted and received through unlicensed frequency bands. In this case, the data with high reliability may include the user equipment's personal information, login information, financial information, payment information, etc.

[0150] For example, when the first user equipment and the second user equipment perform sidelink communication, data that needs to be encrypted can be sent and received through licensed frequency bands, while data that does not need to be encrypted can be sent and received through unlicensed frequency bands. In this case, the data that needs to be encrypted may include the user equipment's personal information, login information, financial information, payment information, etc.

[0151] For example, when the first user equipment and the second user equipment perform sidelink communication, data that requires urgency can be sent and received through licensed frequency bands, while data that does not require urgency can be sent and received through unlicensed frequency bands. In this case, data requiring urgency may include disaster information, emergency information, accident information, emergency braking information, etc.

[0152] For example, when the first user equipment and the second user equipment perform sidelink communication, data related to vehicle software update prompts can be sent and received through licensed frequency bands, while vehicle software update data can be sent and received through unlicensed frequency bands.

[0153] For example, when the first user equipment and the second user equipment perform sidelink communication, data with mandatory attributes can be sent and received through licensed frequency bands, while data with optional attributes can be sent and received through unlicensed frequency bands.

[0154] For example, when the first user equipment and the second user equipment perform sidelink communication, the data to be uploaded can be sent and received through the licensed frequency band, while the data to be downloaded can be sent and received through the unlicensed frequency band.

[0155] For example, when the first user equipment and the second user equipment perform sidelink communication, a resource indicator used to indicate resources for communication can transmit and receive data through licensed frequency bands, and can also transmit and receive data through resources including unlicensed frequency bands. Specifically, the first user equipment and the second user equipment can transmit and receive data through resources in unlicensed frequency bands, where the resources in the unlicensed frequency bands are those indicated by the resource indicator that are transmitted and received through the licensed frequency bands.

[0156] For example, when the first user equipment and the second user equipment perform sidelink communication, the control information used to enable the first user equipment to control the second user equipment can be sent and received through the licensed frequency band, and the ACK / NACK information or feedback information for the control information can be sent and received through the unlicensed frequency band.

[0157] The example described above, in which the first user equipment and the second user equipment communicate via sidelink to utilize licensed and unlicensed frequency bands, is merely one embodiment. Licensed and unlicensed frequency bands may also be utilized in situations contrary to the described embodiment.

[0158] Figure 7 This is an example illustrating the operation of a first user device according to various embodiments.

[0159] Reference Figure 7 In action 710, the first user equipment (UE) (e.g., the processor of the first user equipment) can receive the first SCI from the second user equipment via a PSCCH configured in an unlicensed frequency band. For example, the unlicensed frequency band may include the 5.9 GHz band or at least a portion of the 5.9 GHz band.

[0160] In action 720, the first user equipment can receive the second SCI from the second user equipment via PSSCH.

[0161] According to one embodiment, the PSSCH can be determined based on the PSCCH. The first SCI may include information related to the PSCCH. For example, the first SCI may include information for scheduling the PSSCH. Therefore, the second user facility can determine the PSCCH based on the first SCI. The second SCI can be used for sending sidechain scheduling information.

[0162] According to one embodiment, the first SCI and the second SCI may be composed of different formats. For example, the first SCI may include SCI format 1-A. The second SCI may include SCI format 2-A and / or SCI format 2-B.

[0163] In action 730, the first user equipment can identify information used to perform communication with the second user equipment in an unlicensed frequency band.

[0164] According to one embodiment, the first user equipment can identify information for performing sidelink communication with the second user equipment in an unlicensed frequency band based on at least one of a first SCI and a second SCI.

[0165] For example, at least one of the first SCI and the second SCI may include information related to channel access, information for requesting feedback, or information related to channel occupancy. As one example, the first SCI may include information related to channel access, and the second SCI may include information for requesting feedback or information related to channel occupancy. As another example, the second SCI may include all of the following information: information related to channel access, information for requesting feedback, or information related to channel occupancy.

[0166] As an example, the size of the channel access-related information can be set to one of 1 to 4 bits. The size of the channel access-related information can be set based on upper-layer parameters configured from Radio Resource Control (RRC) signaling. In other words, the size of the channel access-related information can be determined based on the value of the entry in the upper-layer parameter ul-Access ConfigListDCI-1-1.

[0167] As an example, the size of the information used to request feedback can be set to 1 bit. The information used to request feedback can be set to a first value (e.g., 1) to indicate that feedback is requested, or a second value (e.g., 0) to indicate that no feedback is requested.

[0168] As an example, information about whether a channel is occupied can indicate whether the channel is empty.

[0169] In action 740, the first user device can receive data from the second user device through the sidelink communication path between the first user device and the second user device.

[0170] According to one embodiment, a first user equipment may receive data from a second user equipment via a sidelink communication path between the first user equipment and the second user equipment based on information for performing sidelink communication in an unlicensed frequency band.

[0171] For example, the first user equipment can receive data from the second user equipment via PSSCH.

[0172] Figure 8 This is another example illustrating the operation of a first user device according to various embodiments.

[0173] Reference Figure 8 In action 810, the first user equipment (e.g., the processor of the first user equipment) can receive DCI from the base station. For example, the DCI can be transmitted via the physical downlink control channel (PDCCH).

[0174] For example, DCI may include information related to channels within unlicensed frequency bands used for sidelink communication with the second user equipment. As an example, the channel-related information may include information related to channels (or resources) available for sidelink communication. In other words, the base station may allocate channels in the first user equipment for performing sidelink communication. The first user equipment can obtain channels for performing sidelink communication from the base station.

[0175] In action 820, the first user equipment can determine the channel through which sidelink communication will be performed with the second user equipment.

[0176] For example, a first user facility allocates a channel available for sidelink communication based on information related to a channel in an unlicensed frequency band used for performing sidelink communication with a second user facility, and can determine from the channel the actual channel to be used for sidelink communication, the message being included in the DCI.

[0177] When the first user device is within the coverage area of ​​the base station, it can be executed. Figure 8 Actions 810 and 820, and can be executed Figure 7The action 710 is performed before this step. That is, the first user equipment can obtain a channel for performing sidelink communication from the base station, and can determine the channel for performing sidelink communication from the allocated channels. Afterwards, the first user equipment performs... Figure 7 Actions 710 to 740 shown in the diagram enable sidelink communication with the second user device.

[0178] Figure 9 This illustrates yet another example of the operation of a first user device according to various embodiments.

[0179] Reference Figure 9 In action 910, the first user equipment may send capability information related to communication (e.g., sidelink communication) in the unlicensed frequency band to the second user equipment within the licensed frequency band.

[0180] According to one embodiment, the first user equipment may be operating on a licensed frequency band. The first user equipment may sense (or perform a discovery process) communicable devices located in its vicinity. The first user equipment may also identify the presence of a second user equipment in its vicinity.

[0181] Subsequently, the first user equipment can determine whether it is capable of communicating with the second user equipment on an unlicensed frequency band. The first user equipment can send capability information related to communication on the unlicensed frequency band (i.e., the first user equipment's capability information) to the second user equipment within a licensed frequency band. The first user equipment can also receive capability information related to communication on the unlicensed frequency band (i.e., the second user equipment's capability information) from the second user equipment within a licensed frequency band. In other words, the first and second user equipment can exchange capability information related to communication on the unlicensed frequency band, thereby identifying whether the first and second user equipment are capable of communicating on the unlicensed frequency band.

[0182] According to one embodiment, a first user equipment can determine the conditions for initiating communication (e.g., sidelink communication) with a second user equipment in an unlicensed frequency band.

[0183] For example, if a communication error occurs between the first user equipment and the second user equipment in the licensed frequency band, communication on the unlicensed frequency band can be initiated.

[0184] For example, if a first user equipment (User Equipment) generates excessive data to send and receive while communicating with a second User Equipment (User Equipment) within a licensed frequency band, communication can commence in an unlicensed frequency band. As an example, the first User Equipment might generate excessive data to send to the second User Equipment. The first User Equipment sends a BSR (buffer status report) to the base station and is allocated a communication channel in the unlicensed frequency band, thus enabling communication with the second User Equipment on the unlicensed band.

[0185] For example, when the reliability of communication between the first user equipment and the second user equipment in the licensed frequency band is below a specified value, communication can begin in the unlicensed frequency band. In the following... Figure 10 The specific actions in the example can be described in the text.

[0186] Figure 9 The action 910 shown can be performed in Figure 7 The action 710 is executed before the first user equipment. Therefore, the first user equipment can identify the second user equipment in its vicinity and determine the feasibility of communicating with the second user equipment in the unlicensed frequency band. Afterwards, the first user equipment executes... Figure 7 Actions 710 to 740 are shown, thereby enabling sidelink communication with the second user device.

[0187] Figure 10 This is yet another example illustrating the operation of a first user device according to various embodiments.

[0188] Reference Figure 10 In action 1010, the first user device (e.g., the processor of the first user device) can identify cases where the reliability of communication with the second user device (e.g., sidelink communication) within the licensed frequency band is below a specified value.

[0189] According to one embodiment, a first user equipment (User Equipment) can perform sidelink communication with a second User Equipment (User Equipment) within a licensed frequency band. During this sidelink communication, a situation can be identified where the reliability of communication with the second User Equipment is below a specified value. In the case of V2X communication, extremely high reliability may be required. Therefore, to achieve extremely high-reliability communication with the second User Equipment, the first User Equipment can use an unlicensed frequency band.

[0190] In action 1020, the first user equipment may request communication on an unlicensed frequency band from the second user equipment.

[0191] According to one embodiment, a first user device may request communication on an unlicensed frequency band from a second user device if the reliability of communication with the second user device within the licensed frequency band is below a specified value.

[0192] The first user equipment can receive a response from the second user equipment regarding a communication request on an unlicensed frequency band. Based on the response, the first user equipment can perform communication with the second user equipment on the unlicensed frequency band.

[0193] Figure 11 This is an example illustrating the operation of a second user device according to various embodiments.

[0194] Reference Figure 11 In action 1110, the second user equipment (UE) (e.g., the processor of the second user equipment) can send first sidelink control information (SCI) to the first user equipment via a physical sidelink control channel (PSCCH) located in an unlicensed frequency band. For example, the unlicensed frequency band may include the 5.9 GHz band or at least a portion of the 5.9 GHz band.

[0195] According to one embodiment, before performing action 1110, the second user equipment may transmit capability information related to communication on unlicensed frequency bands within the licensed frequency band. The second user equipment and the first user equipment may exchange capability information related to communication on unlicensed frequency bands, thereby allowing the first user equipment to confirm that it is capable of communicating with the first user equipment on unlicensed frequency bands.

[0196] According to one embodiment, the second user equipment can determine information for performing sidelink communication with the first user equipment in an unlicensed frequency band. For example, the information for performing sidelink communication in an unlicensed frequency band may include information related to channel access, information for requesting feedback, or information related to whether a channel is occupied.

[0197] In action 1120, the second user equipment can send the second SCI to the first user equipment via the physical sidelink shared channel (PSSCH) determined based on the PSCCH.

[0198] According to one embodiment, the PSSCH can be determined based on the PSCCH. The first SCI may include information related to the PSCCH. For example, the first SCI may include information for scheduling the PSSCH. Therefore, the second user facility can determine the PSCCH based on the first SCI. The second SCI can be used for sending sidechain scheduling information.

[0199] According to one embodiment, the first SCI and the second SCI can be composed of different formats. For example, the first SCI may include SCI format 1-A. The second SCI may include SCI format 2-A and / or SCI format 2-B.

[0200] According to one embodiment, at least one of the first SCI and the second SCI may include information for performing sidelink communication.

[0201] For example, at least one of the first SCI and the second SCI may include information related to channel access, information for requesting feedback, or information related to whether the channel is occupied. As an example, the first SCI may include information related to channel access, and the second SCI may include information for requesting feedback or information related to whether the channel is occupied.

[0202] As an example, the size of the channel access-related information can be set to one of 1 to 4 bits. The size of the channel access-related information can be set based on upper-layer parameters set from Radio Resource Control (RRC) signaling. In other words, the size of the channel access-related information can be determined based on the value of the entry in the upper-layer parameter ul-AccessConfigListDCI-1-1.

[0203] As an example, the size of the information used to request feedback can be set to 1 bit. The information used to request feedback can be set to a first value (e.g., 1) to indicate that feedback is requested or a second value (e.g., 0) to indicate that no feedback is requested.

[0204] As an example, information about whether a channel is occupied can indicate whether the channel is empty.

[0205] In action 1130, the second user device can send data to the first user device through the side link communication path between the first user device and the second user device.

[0206] According to one embodiment, the second user device can send data to the first user device based on at least one of the first SCI and the second SCI, through a sidelink communication path between the first user device and the second user device.

[0207] For example, the second user unit can send data to the first user unit via PSSCH.

[0208] Figure 12 It is a simplified block diagram of a user equipment according to various embodiments.

[0209] refer to Figure 12 User equipment 1200 may be an example of electronic device 210, electronic device 220, or electronic device 240. User equipment 1200 may include processor 1202, memory 1204, storage device 1206, high-speed controller 1208 (e.g., northbridge, Main Controller Hub (MCH)), and low-speed controller 1212 (e.g., southbridge, I / O controller hub (ICH)). Within user equipment 1200, each of processor 1202, memory 1204, storage device 1206, high-speed controller 1208, and low-speed controller 1212 may be interconnected using various buses.

[0210] For example, processor 1202 can process instructions for execution within user equipment 1200 to display graphical information about a GUI (graphical user interface) on an external input / output device (e.g., a display 1216 connected to high-speed controller 1208). The instructions may be stored in memory 1204 or storage device 1206. When executed by processor 1202, the instructions may cause user equipment 1200 to perform one or more of the aforementioned actions. According to embodiments, processor 1202 may also consist of multiple processors, including a communication processor and a graphics processing unit (GPU).

[0211] For example, memory 1204 may store information within user equipment 1200. For example, memory 1204 may be one or more volatile memory cells. As another example, memory 1204 may be one or more non-volatile memory cells. As yet another example, memory 1204 may be another form of computer-readable medium, such as a magnetic disk or optical disk.

[0212] For example, storage device 1206 can provide mass storage space to user equipment 1200. For example, storage device 1206 can be computer-readable media, such as hard disk devices, optical disk devices, flash memory, solid-state storage devices, or arrays of devices in a storage area network (SAN).

[0213] For example, high-speed controller 1208 manages bandwidth-intensive operations of user equipment 1200, while low-speed controller 1212 manages low-bandwidth-intensive operations of user equipment 1200. For example, high-speed controller 1208 is coupled to memory 1204 and connected to display 1216 via a GPU or accelerator, while low-speed controller 1212 may be coupled to storage device 1206 and coupled to various communication ports (e.g., Universal Serial Bus (USB), Bluetooth, Ethernet, Wireless Ethernet) for communicating with external electronic devices (e.g., keyboards, transducers, scanners, or network devices such as switches or routers).

[0214] A first user equipment (UE) according to various embodiments includes: a transceiver for transmitting and receiving radio signals; and a processor connected to the transceiver, the processor being configured to: receive first sidelink control information (SCI) from a second user equipment via a physical sidelink control channel (PSCCH) configured in an unlicensed frequency band; receive a second SCI from the second user equipment via a physical sidelink shared channel (PSSCH) determined based on the PSCCH, the first SCI and the second SCI being configured with different formats from each other; identify information for performing sidelink communication with the second user equipment in the unlicensed frequency band based on at least one of the first SCI and the second SCI; and receive data from the second user equipment via a sidelink communication path between the first user equipment and the second user equipment based on the identified information.

[0215] According to one embodiment, at least one of the first SCI and the second SCI may include information related to channel access, information for requesting feedback, or information related to whether the channel is occupied.

[0216] According to one embodiment, the size of information related to channel access can be set based on upper-layer parameters configured by Radio Resource Control (RRC) signaling.

[0217] According to one embodiment, the information used to request feedback can be set to a first value indicating a request for feedback or a second value indicating no request for feedback.

[0218] According to one embodiment, the processor of the first user equipment may be configured to: receive downlink control information (DCI) related to the unlicensed frequency band from a base station, the DCI including information related to a channel within the unlicensed frequency band for performing the sidelink communication with the second user equipment; and determine the channel for performing the sidelink communication with the second user equipment.

[0219] According to one embodiment, the processor of the first user equipment may be configured to send capability information related to communication in the unlicensed frequency band to the second user equipment within the licensed frequency band.

[0220] According to one embodiment, the processor of the first user device may be configured to: during sidelink communication with the second user device in the licensed frequency band, identify that the reliability of communication with the second user device in the licensed frequency band is below a specified value; and based on the fact that the reliability of communication with the second user device in the licensed frequency band is below the specified value, request communication in the unlicensed frequency band from the second user device.

[0221] According to one embodiment, the unlicensed frequency band may include the 5.9 GHz band.

[0222] According to various embodiments, a method for activating a first user equipment in a wireless communication system includes the following actions: receiving first sidelink control information (SCI) from a second user equipment via a physical sidelink control channel (PSCCH) configured in an unlicensed frequency band; receiving a second SCI from the second user equipment via a physical sidelink shared channel (PSSCH) determined based on the PSCCH, wherein the first SCI and the second SCI are configured with different formats from each other; identifying information for performing sidelink communication with the second user equipment in the unlicensed frequency band based on at least one of the first SCI and the second SCI; and receiving data from the second user equipment via a sidelink communication path between the first user equipment and the second user equipment based on the identified information.

[0223] According to one embodiment, at least one of the first SCI and the second SCI may include information related to channel access, information for requesting feedback, or information related to whether the channel is occupied.

[0224] According to one embodiment, the size of the information related to channel access can be set based on upper-layer parameters set by Radio Resource Control (RRC) signaling.

[0225] According to one embodiment, the information for requesting feedback can be set to a first value indicating a request for feedback or a second value indicating no request for feedback.

[0226] According to one embodiment, the method may further include the following actions: receiving downlink control information (DCI) related to the unlicensed frequency band from a base station, the DCI including information related to a channel within the unlicensed frequency band used for performing sidelink communication with the second user equipment; and determining the channel for performing the sidelink communication with the second user equipment.

[0227] According to one embodiment, the method may further include the following action: sending capability information related to communication in the unlicensed frequency band to the second user equipment within the licensed frequency band.

[0228] According to one embodiment, the method may further include the following actions: during the process of performing sidelink communication with the second user device in the licensed frequency band, identifying that the reliability of communication with the second user device in the licensed frequency band is below a specified value; and based on the fact that the reliability of communication with the second user device in the licensed frequency band is below a specified value, requesting communication in the unlicensed frequency band from the second user device.

[0229] According to one embodiment, the unlicensed frequency band may include the 5.9 GHz band.

[0230] According to various embodiments, the second user equipment includes: a transceiver for transmitting and receiving wireless signals; and a processor connected to the transceiver, the processor being configured to: transmit first sidelink control information (SCI) to the first user equipment via a physical sidelink control channel (PSCCH) located in an unlicensed frequency band; transmit second sidelink control information (SCI) to the first user equipment via a physical sidelink shared channel (PSSCH) determined based on the PSCCH, the first SCI and the second SCI being composed of different formats from each other; and transmit data to the first user equipment via a sidelink communication path between the first user equipment and the second user equipment based on at least one of the first SCI and the second SCI.

[0231] According to one embodiment, the processor of the second user device may also be configured to send capability information related to communication in the unlicensed frequency band to the first user device within the licensed frequency band.

[0232] According to one embodiment, at least one of the first SCI and the second SCI may include information related to channel access, information for requesting feedback, or information related to whether the channel is occupied.

[0233] According to one embodiment, the processor of the second user equipment may be configured to: receive downlink control information (DCI) related to the unlicensed frequency band from a base station, the DCI including information related to a channel within the unlicensed frequency band for performing sidelink communication with the first user equipment; and determine the channel for performing the sidelink communication with the first user equipment.

[0234] A computer-readable storage medium according to various embodiments is used to store one or more programs, the programs including instructions for causing a first user device to perform the following actions: receiving first sidelink control information (SCI) from a second user device via a physical sidelink control channel (PSCCH) configured in an unlicensed frequency band; receiving a second SCI from the second user device via a physical sidelink shared channel (PSSCH) determined based on the PSCCH, the first SCI and the second SCI being configured in different formats; identifying information for performing sidelink communication with the second user device in the unlicensed frequency band based on at least one of the first SCI and the second SCI; and receiving data from the second user device via a sidelink communication path between the first user device and the second user device based on the identified information.

[0235] The user equipment according to the above embodiments may include a vehicle. When the user equipment according to the above embodiments is a vehicle, the sidelink communication in the above embodiments may refer to V2X communication. Therefore, it can be described as a reference for implementation. Figures 13 to 15 The detailed configuration of the vehicle of the user equipment in the above embodiments.

[0236] Figure 13 Examples of user equipment according to various embodiments of this disclosure are shown.

[0237] Figure 14 Examples of functional configurations of user equipment according to various embodiments are shown.

[0238] Figure 15 Examples of gateways associated with user equipment are shown according to various embodiments.

[0239] refer to Figures 13 to 15 The control device 1400, according to various embodiments, can be installed on the vehicle 1300.

[0240] In various embodiments, control device 1400 may include controller 1420 and sensor 1410, with controller 1420 including memory 1422 and processor 1424.

[0241] According to various embodiments, the controller 1420 may be configured by the vehicle manufacturer during manufacturing, or may be additionally configured after manufacturing to perform autonomous driving functions. Alternatively, configuration for continuously performing additional functions may be included through upgrades to the controller 1420 configured during manufacturing.

[0242] The controller 1420 sends control signals to sensors 1410, engine 1306, user interface 1308, wireless communication device 1430, lidar 1440, and camera module 1450, which include other components in the vehicle. Additionally, although not shown, the controller 1420 may also send control signals to acceleration devices, braking systems, steering devices, or navigation devices related to driving the vehicle.

[0243] In various embodiments, controller 1420 can control engine 1306, for example, by detecting the speed limit on the road on which the autonomous vehicle 1300 is traveling and controlling engine 1306 so that the driving speed does not exceed the speed limit, or by controlling engine 1306 to increase the driving speed of autonomous vehicle 1300 within the speed limit range. When sensing modules (sensors 1304a, 1904b, 1904c, 1904d) additionally sense the external environment of the vehicle and transmit it to sensor 1410, controller 1420 receives it and can generate signals for controlling engine 1306 or steering mechanism (not shown), thereby controlling the driving of the vehicle.

[0244] The controller 1420 can control the engine 1306 or the braking system to decelerate the vehicle when another vehicle or obstacle is in front of it, and in addition to speed, it can also control the trajectory, driving path and steering angle. Alternatively, the controller 1420 can generate necessary control signals based on identification information of other external environments such as the vehicle's driving lane and traffic signals, thereby controlling the vehicle's movement.

[0245] In addition to generating its own control signals, the controller 2020 can also communicate with surrounding vehicles or a central server and send commands to control surrounding devices based on the received information, thereby controlling the driving of the vehicle.

[0246] Furthermore, when the position or viewing angle of the camera module 1450 changes frequently, the controller 1420 may have difficulty accurately identifying the vehicle or lane. Therefore, to prevent this from happening, a control signal can be generated to control the calibration of the camera module 1450. In other words, the controller 1420 can generate a calibration control signal to the camera module 1450, thereby maintaining the initial mounting position, orientation, and viewing angle of the camera module 1450 even if the mounting position of the camera module 1450 changes due to vibrations or impacts caused by the movement of the autonomous vehicle 1300. When the change in the pre-stored information of the initial mounting position, orientation, and viewing angle of the camera module 1450 compared to the information measured during the driving of the autonomous vehicle 1300 exceeds a threshold, the controller 1420 can generate a control signal to perform calibration of the camera module 1450.

[0247] According to various embodiments, controller 1420 may include memory 1422 and processor 1424. Processor 1424 may execute software stored in memory 1422 according to control signals from controller 1420. Specifically, controller 1420 stores data and instructions in memory 1422 for scrambling audio data in various embodiments, which will be executed by processor 1424 to implement one or more of the methods disclosed in this specification.

[0248] In various embodiments, memory 1422 may be stored in a recording medium executable by processor 1424. Memory 1422 may store software and data through suitable internal or external devices. Memory 1422 may include random access memory (RAM), read-only memory (ROM), a hard disk, or a device connected to a dongle.

[0249] The memory 1422 can store at least the operating system (OS), user applications, and executable commands. The memory 1422 can also store application data and array data structures.

[0250] Processor 1424 may be a microprocessor or a suitable electronic processor, controller, microcontroller or state machine.

[0251] The processor 1424 may be implemented by a combination of computing devices, and the computing devices may consist of a digital signal processor, a microprocessor, or any suitable combination thereof.

[0252] Furthermore, according to various embodiments, the control device 1400 may use at least one sensor 1410 to monitor the internal and external characteristics of the autonomous vehicle 1300 and detect its status.

[0253] Sensor 1410 may include at least one sensing module 1304 (e.g., sensor 1904a, sensor 1904b, sensor 1904c, and sensor 1904d), and the sensing module 1904 may be located at a specific position on the autonomous vehicle 1900 depending on the sensing purpose. For example, the sensing module 1304 may be located at the bottom, rear end, front end, top end, or side end of the autonomous vehicle 1300, or it may be located on an internal component of the vehicle or on the tires.

[0254] In this way, as internal vehicle information, the sensing module 1304 can sense driving-related information such as the vehicle's engine 1306, tires, steering angle, speed, and weight. Furthermore, at least one sensing module 1304 may include an accelerometer, gyroscope, image sensor, radar (RADAR), ultrasonic sensor, LiDAR sensor, etc., and can detect motion information of the autonomous vehicle 1300.

[0255] As external information, the sensing module 1304 receives specific data on the external environment, such as the status information of the road on which the autonomous vehicle 1300 is located, information of surrounding vehicles, and weather conditions, and can also sense vehicle parameters based on these data. The sensed information can be temporarily or permanently stored in the memory 1422, depending on the purpose.

[0256] According to various embodiments, sensor 1410 may integrate and collect information from sensing module 1304, which is used to collect information generated inside and outside the autonomous vehicle 1300.

[0257] The control device 1400 may also include a wireless communication device 1430.

[0258] Wireless communication device 1430 is configured to enable wireless communication between autonomous vehicles 1300. For example, it enables autonomous vehicles 1300 to communicate with a user's mobile phone, another wireless communication device 1430, another vehicle, a central device (traffic control device), a server, etc. Wireless communication device 1430 can send and receive wireless signals according to an access wireless protocol. The wireless communication protocol can be Wi-Fi, Bluetooth, Long Term Evolution (LTE), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Global Systems for Mobile Communications (GSM), and other communication protocols, but not limited to these.

[0259] Furthermore, according to various embodiments, the autonomous vehicle 1300 can achieve vehicle-to-vehicle communication via the wireless communication device 1430. That is, the wireless communication device 1430 can communicate with other vehicles and other vehicles on the road via vehicle-to-vehicle communication (V2X). The autonomous vehicle 1300 can send and receive information such as driving warnings and traffic information via vehicle-to-vehicle communication, and can request information or receive requests from other vehicles. For example, the wireless communication device 1430 can perform V2V communication via a dedicated short-range communication (DSRC) device or a cellular vehicle-to-vehicle (C-V2V) device. In addition to vehicle-to-vehicle communication, vehicle-to-everything (V2X) communication between a vehicle and another object (e.g., electronic devices carried by a pedestrian) can also be achieved via the wireless communication device 1430.

[0260] Furthermore, the control device 1400 may include a LIDAR device 1440. The LIDAR device 1440 can utilize data sensed by LIDAR sensors to detect objects around the autonomous vehicle 1300 during operation. The LIDAR device 1440 can send the detected information to the controller 1420, and the controller 1420 can cause the autonomous vehicle 1300 to perform actions based on the detected information. For example, if a slow-moving vehicle is present ahead, the controller 1420 can include a command in the detection information to cause the vehicle to decelerate via engine 1306. Alternatively, the command can be given to slow the vehicle's entry speed according to the curvature of the curve it is entering.

[0261] The control device 1400 may also include a camera module 1450. The controller 1420 can extract object information from the external image captured by the camera module 1450 and allows the controller 1420 to process the information.

[0262] In addition, the control device 1400 may also include imaging equipment for identifying the external environment. Besides the LIDAR device 1440, radar, GPS devices, odometry, and other computer vision devices may also be used, and these devices can be selected or activated simultaneously as needed, thereby enabling more accurate detection.

[0263] The autonomous vehicle 1300 may further include a user interface 1308 for allowing a user to input information into the control device 1400. The user interface 1308 allows the user to input information through appropriate interaction, such as a touchscreen, keypad, or operation buttons. The user interface 1308 can send inputs or commands to the controller 1420, and the controller 1420 can execute vehicle control actions in response to the inputs or commands.

[0264] Furthermore, the user interface 1308 can be an external device to the autonomous vehicle 1300 and can communicate with the autonomous vehicle 1300 via the wireless communication device 1430. For example, the user interface 1308 can be interoperable with mobile phones, tablets, or other computer devices.

[0265] Furthermore, although the case of an autonomous vehicle 1300 including an engine 1306 has been described according to various embodiments, other types of propulsion systems may also be included. For example, the vehicle may be driven by electric power, or by hydrogen power, or a hybrid power system combining both. Therefore, the controller 1420 may include propulsion mechanisms based on the propulsion system of the autonomous vehicle 1300, and may provide control signals based thereon to each component of the propulsion mechanism.

[0266] In the following text, reference will be made to Figure 14 The detailed configuration of the control device 1400 for scrambling audio data according to various embodiments is described in more detail below.

[0267] The control device 1400 includes a processor 1424. The processor 1424 may be a general-purpose single-chip or multi-chip microprocessor, a dedicated microprocessor, a microcontroller, a programmable gate array, etc. The processor may also be referred to as a central processing unit (CPU). Furthermore, according to various embodiments, the processor 1424 may be used as a combination of multiple processors.

[0268] The control device 1400 also includes a memory 1422. The memory 1422 can be any electronic component capable of storing electronic information. In addition to a single memory, the memory 1422 may also include a combination of multiple memories 1422.

[0269] According to various embodiments, the data and instructions 1424a used to scramble the audio data can also be stored in the memory 1422. When the processor 1424 executes the instructions 1424a, all or part of the instructions 1422a and the data 1424b required in the execution command can also be loaded onto the processor 1424 (e.g., instructions 1424a, data 1424b).

[0270] The control device 1400 may include a transmitter 1430a, a receiver 2030b, or a transceiver 1430c for enabling the transmission and reception of signals. More than one antenna 1432a, antenna 1432b may be electrically connected to the transmitter 1430a, receiver 1430b, or each transceiver 1430c, and may additionally include antennas.

[0271] The control device 1400 may also include a digital signal processor (DSP) 1470. The DSP 1470 enables the vehicle to process data signals rapidly.

[0272] The control device 1400 may also include a communication interface 1480. The communication interface 1480 may include one or more ports and / or communication modules for connecting other devices to the control device 1400. The communication interface 1480 enables users and the control device 1400 to interact.

[0273] Various components of the control device 1400 can be connected together via one or more buses 1490. These buses 1490 may include power buses, control signal buses, status signal buses, data buses, etc. Under the control of the processor 1424, these components can exchange information and perform desired functions via the buses 1490.

[0274] On the other hand, in various embodiments, the control device 1400 may be associated with a gateway for communicating with a security cloud. For example, see reference... Figure 15 The control device 1400 is a gateway 1505, which provides information acquired by at least one of the components 1501 to 1504 of the vehicle 1500 to the security cloud 1506. For example, the gateway 1505 may be included within the control device 1400. As another example, the gateway 1505 may also be configured as a separate device within the vehicle 1500, distinct from the control device 1400. The gateway 1505 can communicate with the networks within the vehicle 1500, which have separate networks from each other, including the software management cloud 1509, the security cloud 1506, and the in-vehicle security software 1510.

[0275] For example, component 1501 may be a sensor. For example, the sensor may be used to acquire information related to at least one of the states of vehicle 1500 or vehicle 1500. For example, component 1501 may include sensor 1410.

[0276] For example, component 1502 may be an electronic control unit (ECU). For example, an ECU may be used for engine control, transmission control, airbag control, and tire pressure management.

[0277] For example, component 1503 may be an instrument cluster. For example, the instrument cluster may refer to a panel located in front of the driver's seat in a dashboard. For example, the instrument cluster may be configured to display information needed for driving to the driver (or passenger). For example, the instrument cluster may be used to display at least one of the following: visual elements indicating engine revolutions per minute (RPM), visual elements indicating the speed of vehicle 1500, visual elements indicating remaining fuel, visual elements indicating gear status, or visual elements indicating information obtained from component 1501.

[0278] For example, component 1504 may be a telematics device. For example, the telematics device may refer to a device that provides various mobile communication services by combining wireless communication technology and Global Positioning System (GPS) technology, such as location information and safe driving in vehicle 1500. For example, the telematics device may be used to connect vehicle 1500 with the driver, the cloud (e.g., security cloud 1506), and / or the surrounding environment. For example, to implement 5G NR standard technologies (e.g., 5G NR V2X technology), the telematics device may be configured to support high bandwidth and low latency. For example, the telematics device may be configured to support autonomous driving of vehicle 1500.

[0279] For example, gateway 1505 can be used to connect the in-vehicle network to software management cloud 1509 and security cloud 1506, which are external networks. For example, software management cloud 1509 can be used to update or manage at least one software required for driving and managing vehicle 1500. For example, software management cloud 1509 can connect to in-car security software 1510 installed in the vehicle. For example, in-car security software 1510 can be used to provide security functions in vehicle 1500. For example, to encrypt the in-vehicle network, in-car security software 1510 can use an encryption key obtained from an external authorized server to encrypt data sent and received through the in-vehicle network. In various embodiments, the encryption key used in in-car security software 1510 may include vehicle identification information (vehicle license plate, vehicle identification number (VIN)) or uniquely assigned intrinsic information for each user (e.g., user identification information).

[0280] In various embodiments, gateway 1505 can transmit data encrypted by the vehicle security software 1510 to software management cloud 1509 and / or security cloud 1506 based on an encryption key. Software management cloud 1509 and / or security cloud 1506 decrypt the data using a decryption key capable of decrypting the data encrypted by the encryption key of the vehicle security software 1510, thereby identifying from which vehicle or user the data was received. For example, since the decryption key is a unique key corresponding to the encryption key, software management cloud 1509 and / or security cloud 1506 can decrypt the sender of the data (e.g., the vehicle or the user) based on the data decrypted by the decryption key.

[0281] For example, gateway 1505 can be configured to support in-vehicle security software 1510 and can be associated with control device 1400. For instance, gateway 1505 can be associated with control device 1400 to support connectivity between control device 1400 and client device 1507 connected to security cloud 1506. As another example, gateway 1505 can be associated with control device 1400 to support connectivity between control device 1400 and a third-party cloud 1508 connected to security cloud 1506. However, it is not limited to these examples.

[0282] In various embodiments, gateway 1505 may be used to connect vehicle 1500 to software management cloud 1509 for managing the operating software of vehicle 1500. For example, software management cloud 1509 monitors whether the operating software of vehicle 1500 needs to be updated, and if it detects that the operating software of vehicle 1500 needs to be updated, it can provide data for updating the operating software of vehicle 1500 through gateway 1505. As another example, software management cloud 1509 can receive user requests from vehicle 1500 requesting an update of the operating software of vehicle 1500 through gateway 1505, and based on the received user requests, can provide data for updating the operating software of vehicle 1500. However, it is not limited to this.

[0283] The aforementioned devices can be implemented as hardware components (constituents), software components, and / or combinations of hardware and software components. For example, the devices and components described in the embodiments may include processors, controllers, arithmetic logic units (ALUs), digital signal processors, microcomputers, field-programmable gate arrays (FPGAs), programmable logic units (PLUs), microprocessors, or any other device capable of executing and responding to instructions, which may be implemented using one or more general-purpose or special-purpose computers. The processing device may execute an operating system (OS) and one or more software application processes running on the operating system. Furthermore, the processing device may access, store, manipulate, process, and generate data in response to the execution of the software. For ease of understanding, although a processing device is sometimes described as being used, those skilled in the art will recognize that the processing device may include multiple processing elements and / or various types of processing elements. For example, a processing device may include multiple processors or one processor and one controller. Furthermore, other processing configurations are also possible, such as parallel processors.

[0284] Software can include computer programs, code, instructions, or combinations thereof, which configure a processing device to operate as needed, or to command the processing device independently or collectively. Software and / or data can embody in any type of machine, component, physical device, computer storage medium, or device for interpretation by or to provide instructions or data to the processing device. Software can also be distributed across a network-connected computer system and stored or executed in a distributed manner. Software and data can be stored on one or more computer-readable recording media.

[0285] The method according to the embodiments can be implemented in the form of program instructions executable by various computer means, thereby being recorded on a computer-readable medium. In this case, the medium can be a computer-executable program that is continuously stored, or it can be a temporary storage program for execution or download. Furthermore, the medium can be a variety of recording or storage devices in the form of a single or multiple hardware combinations, not limited to media directly connected to any computer system, but also distributed over a network. Examples of media include hard disks, magnetic media such as floppy disks and magnetic tapes, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floppy disks, and media including ROM, RAM, flash memory, etc., configured to store program instructions. Other examples of media include recording or storage media managed by application stores, sites and servers that provide or distribute various other software, or those involved in application distribution processes.

[0286] As described above, although embodiments have been described with reference to defined examples and accompanying drawings, various modifications and variations can be made by those skilled in the art based on the above description. For example, the described techniques may be performed in a different order than the described methods, and / or the described components of the system, structure, apparatus, circuit, etc. may be combined or combined in a form different from the described methods, or other components may be replaced or substituted with equivalents to achieve suitable results.

[0287] Therefore, equivalents of other implementations, other embodiments, and claims also fall within the scope of the appended claims.

Claims

1. A first user device, wherein, include: Transceivers used for sending and receiving wireless signals, and The processor connected to the transceiver; The processor is configured as follows: The system receives a radio resource control message from the base station, the radio resource control message including parameters indicating that information on the allowed channel occupancy time interval is transmitted through the physical side link control channel; The first sidelink control information is received from the second user equipment via a physical sidelink control channel set within the shared spectrum. The first sidelink control information includes a 1-bit indicator regarding channel access. The second sidelink control information is received from the second user equipment through a physical sidelink shared channel determined based on the first sidelink control information. The first sidelink control information and the second sidelink control information are composed of different formats from each other. The second sidelink control information includes information for radio resource control messages for the second user equipment. Based on the second side link control information, identify the information of the radio resource control message for the second user equipment within the shared spectrum; as well as Based on the information in the radio resource control message for the second user equipment, sidelink communication with the second user equipment is performed within the shared spectrum.

2. The first user device according to claim 1, wherein, At least one of the first sidelink control information and the second sidelink control information includes information related to channel access or information for requesting feedback.

3. The first user device according to claim 2, wherein, The size of the information related to channel access is based on other parameters set by the radio resource control message.

4. The first user device according to claim 2, wherein, The information used to request feedback is set to a first value indicating that feedback is requested or a second value indicating that feedback is not requested.

5. The first user device according to claim 1, wherein, The processor is also configured to: The base station receives downlink control information related to the shared spectrum, the downlink control information including information related to channels within the shared spectrum, the channels being used for sidelink communication with the second user equipment; as well as Determine the channel for the sidelink communication with the second user device.

6. The first user device according to claim 1, wherein, The processor is also configured to: Within the licensed frequency band, transmit capability information related to the sidelink communication within the shared spectrum to the second user equipment.

7. The first user device according to claim 6, wherein, The processor is also configured to: During sidelink communication with the second user equipment within the licensed frequency band, the reliability of communication with the second user equipment within the licensed frequency band is identified as below a specified value; Based on the fact that the reliability of communication with the second user equipment within the licensed frequency band is below a specified value, the sidelink communication on the shared spectrum is requested from the second user equipment.

8. The first user device according to claim 1, wherein, The shared spectrum includes the 5.9 GHz band.

9. A method for activating a first user device in a wireless communication system, wherein, Including the following actions: The system receives a radio resource control message from the base station, the radio resource control message including parameters indicating that information on the allowed channel occupancy time interval is transmitted through the physical side link control channel; The first sidelink control information is received from the second user equipment via a physical sidelink control channel set within the shared spectrum. The first sidelink control information includes a 1-bit indicator regarding channel access. The second sidelink control information is received from the second user equipment through a physical sidelink shared channel determined based on the first sidelink control information. The first sidelink control information and the second sidelink control information are composed of different formats from each other. The second sidelink control information includes information for radio resource control messages for the second user equipment. Based on the second side link control information, identify the information of the radio resource control message for the second user equipment within the shared spectrum; as well as Based on the information in the radio resource control message for the second user equipment, sidelink communication with the second user equipment is performed within the shared spectrum.

10. The method for activating a first user device in a wireless communication system according to claim 9, wherein, At least one of the first sidelink control information and the second sidelink control information includes information related to channel access or information for requesting feedback.

11. The method for activating a first user device in a wireless communication system according to claim 10, wherein, The size of the information related to channel access is based on other parameters set by the radio resource control message.

12. The method for activating a first user device in a wireless communication system according to claim 10, wherein, The information used to request feedback is set to a first value indicating that feedback is requested or a second value indicating that feedback is not requested.

13. The method for activating a first user device in a wireless communication system according to claim 9, further comprising the following actions: Receive downlink control information related to the shared spectrum from the base station, the downlink control information including channel-related information within the shared spectrum, the channel being used for sidelink communication with the second user equipment; and Determine the channel for the sidelink communication with the second user device.

14. The method for activating a first user device in a wireless communication system according to claim 9, wherein, It also includes the following actions: Within the licensed frequency band, transmit capability information related to the sidelink communication within the shared spectrum to the second user equipment.

15. The method for activating a first user device in a wireless communication system according to claim 14, wherein, It also includes the following actions: During sidelink communication with the second user equipment within the licensed frequency band, the reliability of communication with the second user equipment within the licensed frequency band is identified as below a specified value; as well as Based on the fact that the reliability of communication with the second user equipment within the licensed frequency band is below a specified value, the action of the sidelink communication within the shared spectrum is requested from the second user equipment.

16. The method for activating a first user device in a wireless communication system according to claim 9, wherein, The shared spectrum includes the 5.9 GHz band.

17. A second user device, wherein, include: Transceivers used for sending and receiving wireless signals, and The processor connected to the transceiver; The processor is configured as follows: The system receives a radio resource control message from the base station, the radio resource control message including parameters indicating that information on the allowed channel occupancy time interval is transmitted through the physical side link control channel; Determine information for sidelink communication with the first user equipment within the shared spectrum; The first sidelink control information is sent to the first user equipment via a physical sidelink control channel set within the shared spectrum. The first sidelink control information includes a 1-bit indicator regarding channel access. The second sidelink control information is sent to the first user equipment through a physical sidelink shared channel determined based on the first sidelink control information. The first sidelink control information and the second sidelink control information are composed of different formats. The second sidelink control information includes information for radio resource control messages for the second user equipment. as well as Based on the information in the radio resource control message for the second user device, sidelink communication with the first user device is performed within the shared spectrum.

18. The second user equipment according to claim 17, wherein, The processor is also configured to: Within the licensed frequency band, transmit capability information related to the sidelink communication within the shared spectrum to the first user equipment.

19. The second user device according to claim 17, wherein, At least one of the first sidelink control information and the second sidelink control information includes information related to channel access or information for feedback requests.

20. The second user device according to claim 19, wherein, The processor is configured as follows: The base station receives downlink control information related to the shared spectrum, the downlink control information including information related to channels within the shared spectrum, the channels being used for sidelink communication with the first user equipment; as well as Determine the channel through which the sidelink communication is performed with the first user device.

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