Method and apparatus for signaling information related to TDD time slot configuration in NR V2X

Abstract

A method for performing wireless communication by a first device is presented. The method may include the following steps: receiving information related to a time division duplex (TDD) time slot configuration; sending a sidelink synchronization signal block (S-SSB) to a second device, the S-SSB including a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS), and a physical sidelink broadcast channel (PSBCH); and sending a physical sidelink shared channel (PSSCH) to the second device based on the information related to the TDD time slot configuration. For example, the candidate resources to which a bitmap associated with a sidelink resource pool is applied may be configured based on information related to the TDD time slot configuration; the candidate resources may include one or more time slots; configuration information related to a sidelink symbol included in each of the one or more time slots may be received; the configuration information related to the sidelink symbol may include information related to the position of the sidelink symbol; and the position of the sidelink symbol may be set to be the same for the candidate resources.

Description

Technical Field

[0001] The present disclosure relates to wireless communication systems. Background Art

[0002] Sidelink (SL) communication is a communication scheme in which a direct link is established between user equipments (UEs) and the UEs directly exchange voice and data with each other without intervention of an evolved Node B (eNB). SL communication is being considered as a solution to eNB overhead caused by the rapid growth of data traffic.

[0003] V2X (Vehicle to Everything) refers to the communication technology used by vehicles to exchange information with other vehicles, pedestrians, and objects equipped with infrastructure. V2X can be divided into four types such as V2V (Vehicle to Vehicle), V2I (Vehicle to Infrastructure), V2N (Vehicle to Network), and V2P (Vehicle to Pedestrian). V2X communication can be provided through the PC5 interface and / or the Uu interface.

[0004] In addition, as more and more communication devices require larger communication capacity, mobile broadband communication enhanced relative to traditional radio access technology (RAT) is required. Therefore, the design of communication systems taking into account UEs or services that are sensitive to reliability and latency has also been discussed, and the next generation radio access technology taking into account enhanced mobile broadband communication, massive MTC, and ultra-reliable low-latency communication (URLLC) can be referred to as a new RAT (radio access technology) or NR (new radio).

[0005] Figure 1 is a diagram for describing NR-based V2X communication compared with V2X communication based on a RAT used before NR. Figure 1 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0006] Regarding V2X communication, when discussing the RAT used before NR, the focus is on the scheme of providing safety services based on V2X messages such as BSM (Basic Safety Message), CAM (Cooperative Awareness Message) and DENM (Decentralized Environment Notification Message). V2X messages may include location information, dynamic information, attribute information, etc. For example, a UE may send a periodic message type CAM and / or an event-triggered message type DENM to another UE.

[0007] For example, CAM may include dynamic state information of the vehicle such as direction and speed, static data of the vehicle such as size, and basic vehicle information such as external lighting status, route details, etc. For example, UE may broadcast CAM, and the latency of CAM may be less than 100ms. For example, UE may generate DENM and send it to another UE in unexpected situations such as vehicle failure, accident, etc. For example, all vehicles within the transmission range of UE can receive CAM and / or DENM. In this case, DENM may have a higher priority than CAM.

[0008] Since then, various V2X scenarios have been proposed in NR regarding V2X communication. For example, these various V2X scenarios may include vehicle platooning, advanced driving, extended sensors, remote driving, etc.

[0009] For example, based on vehicle platooning, vehicles can move together by dynamically forming groups. For example, in order to perform platooning operations based on vehicle formation, vehicles belonging to the group can receive periodic data from the leading vehicle. For example, vehicles belonging to the group can reduce or increase the interval between vehicles by using the periodic data.

[0010] For example, based on advanced driving, the vehicles can be semi-autonomous or fully autonomous. For example, each vehicle can adjust trajectory or maneuver based on data obtained from local sensors of nearby vehicles and / or nearby logical entities. In addition, for example, each vehicle can share driving intentions with nearby vehicles.

[0011] For example, based on the extended sensors, raw data, processed data or real-time video data obtained by local sensors can be exchanged between the vehicle, the logical entity, the pedestrian UE and / or the V2X application server, so that, for example, the vehicle can recognize a further improved environment compared to the environment detected using its own sensors.

[0012] For example, based on remote driving, for a person or remote vehicle that cannot drive in a dangerous environment, a remote driver or V2X application can operate or control the remote vehicle. For example, if the route is predictable (such as public transportation), cloud computing-based driving can be used for the operation or control of the remote vehicle. In addition, for example, access to a cloud-based backend service platform can be considered for remote driving.

[0013] In addition, schemes for specifying service requirements for various V2X scenarios such as vehicle platooning, advanced driving, extended sensors, remote driving, etc. are discussed in NR-based V2X communications. Summary of the invention

[0014] Technical Purpose

[0015] In addition, when the UE performs sidelink communication based on time division duplex (TDD) operation, the base station may allocate some of the uplink (UL) slots / symbols, flexible slots / symbols, or downlink (DL) slots / symbols as sidelink slots / symbols. In this case, for example, the in-coverage (INC) UE may directly receive information related to the configuration of the TDD slots corresponding to the UL slots / symbols, flexible slots / symbols, DL slots / symbols, or sidelink slots / symbols among all resources from the base station. The out-of-coverage (OOC) UE may determine the sidelink slot / symbol based on the information related to the preconfigured TDD slot configuration, and the OOC UE may perform sidelink communication. Therefore, when the base station reconfigures the information related to the TDD slot configuration (which is different from the information related to the preconfigured TDD slot configuration), since the information related to the TDD slot configuration is different between the INC UE and the OOC UE, it may be difficult to perform the sidelink communication between the INC UE and the OOC UE.

[0016] Technical Solution

[0017] According to an embodiment of the present disclosure, a method for performing wireless communication by a first device is provided. The method may include: receiving information related to a time division duplex (TDD) time slot configuration; sending a side link synchronization signal block (S-SSB) to a second device, wherein the S-SSB includes a side link primary synchronization signal (S-PSS), a side link secondary synchronization signal (S-SSS) and a physical side link broadcast channel (PSBCH); and sending a physical side link shared channel (PSSCH) to a second device based on information related to the TDD time slot configuration. For example, the candidate resources to which the bitmap associated with the side link resource pool is applied are configured based on information related to the TDD time slot configuration. For example, the candidate resources include one or more time slots. For example, configuration information related to the side link symbols included in each of the one or more time slots is received. For example, the configuration information related to the side link symbols includes information related to the position of the side link symbols. For example, the position of the side link symbols is configured to be the same for the candidate resources.

[0018] Effects of the present disclosure

[0019] The UE can effectively perform sidelink communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a diagram for describing NR-based V2X communication compared with V2X communication based on a RAT used before NR.

[0021] Figure 2 The structure of the NR system according to an embodiment of the present disclosure is shown.

[0022] Figure 3 The functional division between NG-RAN and 5GC according to an embodiment of the present disclosure is shown.

[0023] Figure 4 A radio protocol architecture according to an embodiment of the present disclosure is shown.

[0024] Figure 5 The structure of the NR system according to an embodiment of the present disclosure is shown.

[0025] Figure 6 The structure of the time slot of the NR frame according to an embodiment of the present disclosure is shown.

[0026] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown.

[0027] Figure 8 A radio protocol architecture for SL communication according to an embodiment of the present disclosure is shown.

[0028] Fig. 9 A UE performing V2X or SL communication according to an embodiment of the present disclosure is shown.

[0029] Fig.10 A process of performing V2X or SL communication by a UE based on a transmission mode according to an embodiment of the present disclosure is shown.

[0030] Fig.11 Three playback types according to an embodiment of the present disclosure are shown.

[0031] Fig.12 A process for a transmitting UE to transmit a PSSCH to a receiving UE based on information related to a TDD timeslot configuration according to an embodiment of the present disclosure is shown.

[0032] Fig.13 An example in which side link symbols are allocated in side link slots according to an embodiment of the present disclosure is shown.

[0033] Fig.14 An example of time slots excluded from the side link time slots according to an embodiment of the present disclosure is shown.

[0034] Fig.15 A method for a first device to transmit a PSSCH to a second device based on information related to a TDD time slot configuration according to an embodiment of the present disclosure is shown.

[0035] Fig.16 A method for a second device to receive a PSSCH from a first device based on information related to a TDD time slot configuration according to an embodiment of the present disclosure is shown.

[0036] Fig.17 A communication system 1 according to an embodiment of the present disclosure is shown.

[0037] Fig.18 A wireless device according to an embodiment of the present disclosure is shown.

[0038] Fig.19 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0039] Fig. 20 A wireless device according to an embodiment of the present disclosure is shown.

[0040] Fig.21 A handheld device according to an embodiment of the present disclosure is shown.

[0041] Fig. 22 An automobile or autonomous vehicle according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0042] In this specification, "A or B" may mean "only A", "only B", or "both A and B". In other words, in this specification, "A or B" may be interpreted as "A and / or B". For example, in this specification, "A, B or C" may mean "only A", "only B", "only C", or "any combination of A, B, C".

[0043] A slash ( / ) or a comma used in this specification may mean "and / or". For example, "A / B" may mean "A and / or B". Thus, "A / B" may mean "only A", "only B", or "both A and B". For example, "A, B, C" may mean "A, B, or C".

[0044] In the present specification, "at least one of A and B" may mean "only A", "only B", or "both A and B". In addition, in the present specification, the expression "at least one of A or B" or "at least one of A and / or B" may be interpreted as "at least one of A and B".

[0045] In addition, in the present specification, "at least one of A, B, and C" may mean "only A", "only B", "only C", or "any combination of A, B, and C". In addition, "at least one of A, B, or C" or "at least one of A, B and / or C" may mean "at least one of A, B, and C".

[0046] In addition, brackets used in this specification may mean "for example". Specifically, when indicated as "control information (PDCCH)", this may mean that "PDCCH" is proposed as an example of "control information". In other words, the "control information" of this specification is not limited to "PDCCH", and "PDDCH" may be proposed as an example of "control information". Specifically, when indicated as "control information (ie, PDCCH)", this may also mean that "PDCCH" is proposed as an example of "control information".

[0047] The technical features described in each of the drawings in this specification may be implemented separately or simultaneously.

[0048] The techniques described below can be used in various wireless communication systems such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. CDMA can be implemented using radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA-2000. TDMA can be implemented using radio technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented using radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), etc. IEEE 802.16m is an evolved version of IEEE 802.16e and provides backward compatibility for systems based on IEEE 802.16e. UTRA is part of Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) using E-UTRA. 3GPP LTE uses OFDMA in the downlink and SC-FDMA in the uplink. LTE-Advanced (LTE-A) is an evolution of LTE.

[0049] 5G NR is a subsequent technology of LTE-A corresponding to a new mobile communication system with high performance, low latency, high availability, etc. 5G NR can use all available spectrum resources including low frequency bands less than 1 GHz, intermediate frequency bands from 1 GHz to 10 GHz, and high frequency (millimeter wave) above 24 GHz.

[0050] For the sake of clarity, the following description will mainly focus on LTE-A or 5G NR. However, the technical features of the embodiments of the present disclosure will not be limited thereto.

[0051] Figure 2 The structure of the NR system according to an embodiment of the present disclosure is shown. Figure 2 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0052] Reference Figure 2 , the next generation radio access network (NG-RAN) may include a BS 20 that provides user plane and control plane protocol terminations to the UE 10. For example, the BS 20 may include a next generation Node B (gNB) and / or an evolved Node B (eNB). For example, the UE 10 may be fixed or mobile and may be referred to as other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), a wireless device, etc. For example, the BS may be referred to as a fixed station that communicates with the UE 10 and may be referred to as other terms such as a base transceiver system (BTS), an access point (AP), etc.

[0053] Figure 2 The embodiment of the present invention illustrates a case where only gNB is included. BS20 may be connected to each other via an Xn interface. BS20 may be connected to each other via a fifth generation (5G) core network (5GC) and an NG interface. More specifically, BS20 may be connected to an access and mobility management function (AMF) 30 via an NG-C interface, and may be connected to a user plane function (UPF) 30 via an NG-U interface.

[0054] Figure 3 The functional division between NG-RAN and 5GC according to an embodiment of the present disclosure is shown.

[0055] Reference Figure 3 , gNB can provide functions such as inter-cell radio resource management (inter-cell RRM), radio bearer (RB) control, connection mobility control, radio admission control, measurement configuration and provision, dynamic resource allocation, etc. AMF can provide functions such as non-access stratum (NAS) security, idle state mobility processing, etc. UPF can provide functions such as mobility anchoring, protocol data unit (PDU) processing, etc. Session management function (SMF) can provide functions such as user equipment (UE) Internet protocol (IP) address allocation, PDU session control, etc.

[0056] The radio interface protocol layer between the UE and the network can be classified into the first layer (L1), the second layer (L2), and the third layer (L3) based on the lower three layers of the open system interconnection (OSI) model known in the communication system. Here, the physical (PHY) layer belonging to the first layer provides an information transmission service using a physical channel, and the radio resource control (RRC) layer located at the third layer controls radio resources between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the BS layer.

[0057] Figure 4 A radio protocol architecture according to an embodiment of the present disclosure is shown. Figure 4 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 4 (a) shows the radio protocol architecture for the user plane, and Figure 4 (b) in FIG. 4 shows a radio protocol architecture for a control plane. The user plane corresponds to a protocol stack for user data transmission, and the control plane corresponds to a protocol stack for control signal transmission.

[0058] Reference Figure 4 , the physical layer provides information transfer services to the upper layer through the physical channel. The physical layer is connected to the medium access control (MAC) layer, which is the upper layer of the physical layer, through the transport channel. Data is transferred between the MAC layer and the physical layer through the transport channel. The transport channel is classified according to how the data is transmitted through the radio interface and what characteristics of the data it transmits.

[0059] Data is transmitted through a physical channel between different PHY layers (ie, a PHY layer of a transmitter and a PHY layer of a receiver). The physical channel may be modulated using an Orthogonal Frequency Division Multiplexing (OFDM) scheme, and uses time and frequency as radio resources.

[0060] The MAC layer provides services to the Radio Link Control (RLC) layer via logical channels, and the RLC layer is a higher layer of the MAC layer. The MAC layer provides a function of mapping multiple logical channels to multiple transport channels. The MAC layer also provides a function of logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides data transmission services through logical channels.

[0061] The RLC layer performs concatenation, segmentation, and reassembly of Radio Link Control Service Data Units (RLC SDUs). In order to ensure different Quality of Service (QoS) required by Radio Bearers (RBs), the RLC layer provides three types of operation modes, namely, Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provides error correction through Automatic Repeat Request (ARQ).

[0062] The Radio Resource Control (RRC) layer is defined only in the control plane. In addition, the RRC layer performs functions related to the configuration, reconfiguration, and release of radio bearers for controlling physical channels, transport channels, and logical channels. RB refers to a logical path provided by the first layer (i.e., the PHY layer) and the second layer (i.e., the MAC layer, the RLC layer, and the PDCP layer) to transmit data between the UE and the network.

[0063] The functions of the Packet Data Convergence Protocol (PDCP) in the user plane include transmission, header compression and encryption of user data. The functions of the Packet Data Convergence Protocol (PDCP) in the control plane include transmission and encryption / integrity protection of control plane data.

[0064] The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs mapping between Quality of Service (QoS) flows and Data Radio Bearers (DRBs) and QoS Flow ID (QFI) marking in both DL and UL packets.

[0065] Configuration of RB refers to the process for specifying radio protocol layers and channel attributes to provide a specific service and for determining corresponding detailed parameters and operation methods. RB can then be classified into two types, namely, signaling radio bearer (SRB) and data radio bearer (DRB). SRB is used as a path for sending RRC messages in the control plane, and DRB is used as a path for sending user data in the user plane.

[0066] When the RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC connected (RRC_CONNECTED) state, otherwise the UE can be in the RRC idle (RRC_IDLE) state. In the case of NR, the RRC inactive (RRC_INACTIVE) state is additionally defined, and the UE in the RRC_INACTIVE state can maintain the connection with the core network and release its connection with the BS.

[0067] The downlink transmission channels for sending (or transmitting) data from the network to the UE include a broadcast channel (BCH) for sending system information and a downlink shared channel (SCH) for sending other user services or control messages. The services or control messages of downlink multicast or broadcast services can be sent via the downlink SCH or can be sent via a separate downlink multicast channel (MCH). In addition, the uplink transmission channels for sending (or transmitting) data from the UE to the network include a random access channel (RACH) for sending initial control messages and an uplink shared channel (SCH) for sending other user services or control messages.

[0068] Examples of logical channels belonging to a higher layer of a transport channel and mapped to a transport channel may include a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), a multicast traffic channel (MTCH), etc.

[0069] The physical channel is configured by multiple OFDM symbols in the time domain and multiple subcarriers in the frequency domain. A subframe is configured by multiple OFDM symbols in the time domain. A resource block is configured by multiple subcarriers and multiple OFDM symbols in a resource allocation unit. In addition, each subframe can use a specific subcarrier of a specific OFDM symbol (e.g., the first OFDM symbol) of the corresponding subframe of the physical downlink control channel (PDCCH), i.e., the L1 / L2 control channel. The transmission time interval (TTI) refers to the unit time of subframe transmission.

[0070] Figure 5 The structure of the NR system according to an embodiment of the present disclosure is shown. Figure 5 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0071] Reference Figure 5 In NR, a radio frame can be used to perform uplink and downlink transmissions. The length of a radio frame is 10ms and can be defined as consisting of two half frames (HF). A half frame can include five 1ms subframes (SF). A subframe (SF) can be divided into one or more time slots, and the number of time slots within a subframe can be determined according to the subcarrier spacing (SCS). Each time slot can include 12 or 14 OFDM (A) symbols depending on the cyclic prefix (CP).

[0072] When a normal CP is used, each time slot may include 14 symbols. When an extended CP is used, each time slot may include 12 symbols. Herein, a symbol may include an OFDM symbol (or a CP-OFDM symbol) and a single carrier-FDMA (SC-FDMA) symbol (or a discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol).

[0073] Table 1 below shows the number of time slots (N) of each symbol according to the SCS setting (μ) when the normal CP is used. slot symb ), the number of time slots per frame (N frame,μ slot ) and the number of time slots per subframe (N subframe,μ slot ).

[0074] [Table 1]

[0075]

[0076]

[0077] Table 2 shows an example of the number of symbols per slot, the number of slots per frame, and the number of slots per subframe according to the SCS in the case of using the extended CP.

[0078] [Table 2]

[0079] <![CDATA[SCS(15*2 μ )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,μ slot ]]> <![CDATA[N subframe,μ slot ]]> 60KHz(μ=2) 12 40 4

[0080] In the NR system, OFDM (A) parameter sets (e.g., SCS, CP length, etc.) between multiple cells integrated into one UE may be configured differently. Therefore, the (absolute time) duration (or interval) of a time resource (e.g., a subframe, a time slot, or a TTI) (collectively referred to as a time unit (TU) for simplicity) consisting of the same number of symbols may be configured differently in the integrated cells.

[0081] In NR, multiple parameter sets or SCSs can be supported to support various 5G services. For example, with an SCS of 15kHz, a wide range of traditional cellular bands can be supported, and with an SCS of 30kHz / 60kHz, dense cities, lower latency, and wider carrier bandwidths can be supported. With an SCS of 60kHz or higher, bandwidths greater than 24.25GHz can be used to overcome phase noise.

[0082] The NR frequency band may be defined as two different types of frequency ranges. The two different types of frequency ranges may be FR1 and FR2. The values ​​of the frequency ranges may be changed (or varied), for example, the two different types of frequency ranges may be as shown in Table 3 below. Among the frequency ranges used in the NR system, FR1 may mean "a range below 6 GHz", and FR2 may mean "a range above 6 GHz", and may also be referred to as millimeter wave (mmW).

[0083] [Table 3]

[0084] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 450MHz–6000MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0085] As described above, the value of the frequency range in the NR system may be changed (or varied). For example, as shown in Table 4 below, FR1 may include a bandwidth in the range of 410 MHz to 7125 MHz. More specifically, FR1 may include frequency bands of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher. For example, the frequency bands of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher included in FR1 may include unlicensed frequency bands. Unlicensed frequency bands may be used for various purposes, for example, unlicensed frequency bands are used for vehicle-specific communications (e.g., autonomous driving).

[0086] [Table 4]

[0087] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 410MHz–7125MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0088] Figure 6 The structure of the time slot of the NR frame according to an embodiment of the present disclosure is shown.

[0089] Reference Figure 6 , a time slot includes multiple symbols in the time domain. For example, in the case of normal CP, one time slot may include 14 symbols. For example, in the case of extended CP, one time slot may include 12 symbols. Alternatively, in the case of normal CP, one time slot may include 7 symbols. However, in the case of extended CP, one time slot may include 6 symbols.

[0090] A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) can be defined as multiple consecutive subcarriers in the frequency domain (e.g., 12 subcarriers). A bandwidth part (BWP) can be defined as multiple consecutive (physical) resource blocks ((P)RBs) in the frequency domain, and a BWP can correspond to a parameter set (e.g., SCS, CP length, etc.). A carrier can include up to N BWPs (e.g., 5 BWPs). Data communication can be performed via an activated BWP. Each element can be referred to as a resource element (RE) in a resource grid, and a complex symbol can be mapped to each element.

[0091] In addition, the radio interface between a UE and another UE or the radio interface between a UE and a network may include an L1 layer, an L2 layer, and an L3 layer. In various embodiments of the present disclosure, the L1 layer may refer to a physical layer. In addition, for example, the L2 layer may refer to at least one of a MAC layer, an RLC layer, a PDCP layer, and an SDAP layer. In addition, for example, the L3 layer may refer to an RRC layer.

[0092] Hereinafter, the bandwidth part (BWP) and the carrier will be described in detail.

[0093] A BWP may be a contiguous set of physical resource blocks (PRBs) within a given parameter set. A PRB may be selected from a contiguous set of common resource blocks (CRBs) for a given parameter set on a given carrier.

[0094] When bandwidth adaptation (BA) is used, the reception bandwidth and transmission bandwidth of the user equipment (UE) are not required to be as wide (or large) as the bandwidth of the cell, and the reception bandwidth and transmission bandwidth of the UE can be controlled (or adjusted). For example, the UE can receive information / configuration for bandwidth control (or adjustment) from the network / base station. In this case, bandwidth control (or adjustment) can be performed based on the received information / configuration. For example, bandwidth control (or adjustment) can include a reduction / expansion of bandwidth, a change in the position of bandwidth, or a change in the subcarrier spacing of bandwidth.

[0095] For example, the bandwidth can be reduced during a duration with little activity in order to save power. For example, the location of the bandwidth can be relocated (or moved) from the frequency domain. For example, the location of the bandwidth can be relocated (or moved) from the frequency domain to enhance scheduling flexibility. For example, the subcarrier spacing of the bandwidth can be changed. For example, the subcarrier spacing of the bandwidth can be changed to authorize different services. A subset of the total cell bandwidth of a cell can be referred to as a bandwidth part (BWP). BA can be performed when the base station / network configures a BWP for the UE and when the base station / network notifies the UE of the BWP that is currently activated among the BWPs.

[0096] For example, the BWP may be one of an activated BWP, an initial BWP, and / or a default BWP. For example, the UE cannot monitor the downlink radio link quality in a DL BWP other than an activated DL BWP within a primary cell (PCell). For example, the UE cannot receive PDCCH, PDSCH, or CSI-RS (except RRM) from outside an activated DL BWP. For example, the UE cannot trigger a channel state information (CSI) report for an unactivated DL BWP. For example, the UE cannot send a PUCCH or PUSCH from outside an unactivated DL BWP. For example, in the case of a downlink, the initial BWP may be given as a continuous RB set for an RMSI CORESET (configured by the PBCH). For example, in the case of an uplink, an initial BWP may be given by the SIB for a random access procedure. For example, a default BWP may be configured by a higher layer. For example, the initial value of the default BWP may be an initial DL BWP. In order to save energy, if the UE cannot detect DCI within a predetermined time period, the UE may switch the UE's activated BWP to a default BWP.

[0097] In addition, a BWP can be defined for SL. The same SL BWP can be used for transmission and reception. For example, a transmitting UE can send a SL channel or a SL signal within a specific BWP, and a receiving UE can receive a SL channel or a SL signal within the same specific BWP. In a licensed carrier, the SL BWP can be defined separately from the Uu BWP, and the SL BWP can have configuration signaling separate from the Uu BWP. For example, the UE can receive a configuration for the SL BWP from the base station / network. The SL BWP can be (pre-)configured for NR V2X UEs and RRC_IDLE UEs out of coverage. For UEs operating in RRC_CONNECTED mode, at least one SL BWP can be activated within the carrier.

[0098] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown. Figure 7 The embodiments of can be combined with various embodiments of the present disclosure. Figure 7 In an implementation manner, the number of BWPs is 3.

[0099] Reference Figure 7 , a common resource block (CRB) may be a carrier resource block numbered from one end of a carrier frequency band to the other end thereof. Additionally, a PRB may be a resource block numbered within each BWP. Point A may indicate a common reference point of a resource block grid.

[0100] It can be obtained by point A, the offset relative to point A (N start BWP ) and bandwidth (N size BWP ) to configure the BWP. For example, point A can be an external reference point of the PRBs of the carrier, and subcarrier 0 of all parameter sets (e.g., all parameter sets supported by the network on the corresponding carrier) are aligned in point A. For example, the offset can be the PRB distance between the lowest subcarrier within a given parameter set and point A. For example, the bandwidth can be the number of PRBs within a given parameter set.

[0101] Hereinafter, V2X or SL communication will be described.

[0102] Figure 8 A radio protocol architecture for SL communication according to an embodiment of the present disclosure is shown. Figure 8 The embodiments of can be combined with various embodiments of the present disclosure. More specifically, Figure 8 (a) in FIG. 1 shows a user plane protocol stack, and Figure 8 (b) in FIG. 5 shows the control plane protocol stack.

[0103] Hereinafter, the side link synchronization signal (SLSS) and the synchronization information will be described in detail.

[0104] The SLSS may include a primary side link synchronization signal (PSSS) and a secondary side link synchronization signal (SSSS) as SL specific sequences. The PSSS may be referred to as a side link primary synchronization signal (S-PSS), and the SSSS may be referred to as a side link secondary synchronization signal (S-SSS). For example, an M sequence of length 127 may be used for the S-PSS, and a Gold sequence of length 127 may be used for the S-SSS. For example, the UE may use the S-PSS for initial signal detection and synchronization acquisition. For example, the UE may use the S-PSS and the S-SSS for acquiring detailed synchronization and for detecting a synchronization signal ID.

[0105] The physical sidelink broadcast channel (PSBCH) can be a (broadcast) channel for sending default (system) information, which must be known by the UE first before SL signal transmission / reception. For example, the default information can be information related to SLSS, duplex mode (DM), time division duplex (TDD) uplink / downlink (UL / DL) configuration, information related to resource pool, type of application related to SLSS, subframe offset, broadcast information, etc. For example, in order to evaluate PSBCH performance, in NR V2X, the payload size of PSBCH can be 56 bits, including 24-bit CRC.

[0106] S-PSS, S-SSS, and PSBCH may be included in a block format that supports periodic transmission (e.g., SL synchronization signal (SS) / PSBCH block, hereinafter, sidelink synchronization signal block (S-SSB)). The S-SSB may have the same parameter set (i.e., SCS and CP length) as the physical sidelink control channel (PSCCH) / physical sidelink shared channel (PSSCH) in the carrier, and the transmission bandwidth may exist within a (pre) configured sidelink (SL) BWP. For example, the S-SSB may have a bandwidth of 11 resource blocks (SBs). For example, the PSBCH may exist across 11 RBs. In addition, the frequency position of the S-SSB may be (pre) configured. Therefore, the UE does not have to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0107] Fig. 9 A UE performing V2X or SL communication according to an embodiment of the present disclosure is shown. Fig. 9 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0108] Reference Fig. 9In V2X or SL communication, the term "UE" may generally refer to a user's UE. However, if a network device such as a BS transmits / receives a signal according to a communication scheme between UEs, the BS may also be regarded as a type of UE. For example, UE 1 may be a first device 100, and UE 2 may be a second device 200.

[0109] For example, UE 1 may select a resource unit corresponding to a specific resource in a resource pool meaning a set of resource series. In addition, UE 1 may send an SL signal by using the resource unit. For example, a resource pool in which UE 1 can send a signal may be configured to UE 2 as a receiving UE, and a signal of UE 1 may be detected in the resource pool.

[0110] Herein, if UE 1 is within the connection range of the BS, the BS may inform the resource pool to UE 1. Otherwise, if UE 1 is out of the connection range of the BS, another UE may inform UE 1 of the resource pool, or UE 1 may use a preconfigured resource pool.

[0111] Generally, a resource pool may be configured in units of multiple resources, and each UE may select one or more units of resources to use in its SL signaling.

[0112] Hereinafter, resource allocation in SL will be described.

[0113] Fig.10 A process of performing V2X or SL communication by a UE based on a transmission mode according to an embodiment of the present disclosure is shown. Fig.10 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure. In various embodiments of the present disclosure, the transmission mode may be referred to as a mode or a resource allocation mode. Hereinafter, for ease of explanation, in LTE, the transmission mode may be referred to as an LTE transmission mode. In NR, the transmission mode may be referred to as an NR resource allocation mode.

[0114] For example, Fig.10 (a) in FIG. 1 shows UE operations related to LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, Fig.10 (a) in FIG. 1 shows UE operations related to NR resource allocation mode 1. For example, LTE transmission mode 1 may be applied to conventional SL communication, and LTE transmission mode 3 may be applied to V2X communication.

[0115] For example, Fig.10 (b) in FIG. 4 shows UE operations related to LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, Fig.10 (b) in FIG. 1 shows UE operation related to NR resource allocation mode 2.

[0116] Reference Fig.10 In (a), in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the BS may schedule SL resources to be used by the UE for SL transmission. For example, the BS may perform resource scheduling for UE 1 through PDCCH (more specifically, downlink control information (DCI)), and UE 1 may perform V2X or SL communication for UE 2 according to the resource scheduling. For example, UE 1 may send sidelink control information (SCI) to UE 2 through a physical sidelink control channel (PSCCH), and thereafter send data based on the SCI to UE 2 through a physical sidelink shared channel (PSSCH).

[0117] Reference Fig.10 (b) in the figure, in LTE transmission mode 2, LTE transmission mode 4 or NR resource allocation mode 2, the UE can determine the SL transmission resources within the SL resources configured by the BS / network or the pre-configured SL resources. For example, the configured SL resources or the pre-configured SL resources can be a resource pool. For example, the UE can autonomously select or schedule resources for SL transmission. For example, the UE can perform SL communication by autonomously selecting resources in the configured resource pool. For example, the UE can autonomously select resources within the selection window by performing sensing and resource (re)selection processes. For example, sensing can be performed in units of subchannels. In addition, UE 1 that has autonomously selected resources in the resource pool can send SCI to UE 2 via PSCCH, and thereafter data based on the SCI can be sent to UE 2 via PSSCH.

[0118] Fig.11 Three playback types according to embodiments of the present disclosure are shown. Fig.11 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Fig.11 (a) shows broadcast type SL communication, Fig.11 (b) in FIG. 4 shows unicast type SL communication, and Fig.11 (c) shows multicast SL communication. In the case of unicast SL communication, the UE can perform one-to-one communication with another UE. In the case of multicast SL transmission, the UE can perform SL communication with one or more UEs in the group to which the UE belongs. In various embodiments of the present disclosure, SL groupcast communication can be replaced by SL multicast communication, SL one-to-many communication, etc.

[0119] In addition, in various embodiments of the present disclosure, for example, "configuration" or "definition" may refer to (pre) configuration from a base station or a network. For example, "configuration" or "definition" may refer to a resource pool-specific (pre) configuration from a base station or a network via predefined signaling (e.g., SIB, MAC, RRC, etc.).

[0120] Furthermore, in various embodiments of the present disclosure, for example, since RLF may be determined based on an out-of-sync (OOS) indicator or an in-sync (IS) indicator, it may be replaced / substituted with out-of-sync (OOS) or in-sync (IS).

[0121] In addition, in various embodiments of the present disclosure, resources may be interchanged / replaced with time slots or symbols. For example, resources may include time slots and / or symbols.

[0122] In addition, in various embodiments of the present disclosure, the Uu channel may include a UL channel and / or a DL channel. For example, the UL channel may include a PUSCH, a PUCCH, etc. For example, the DL channel may include a PDCCH, a PDSCH, etc. For example, the SL channel may include a PSCCH, a PSSCH, a PSFCH, a PSBCH, etc.

[0123] In addition, in various embodiments of the present disclosure, the sidelink information may include at least one of a sidelink message, a sidelink packet, a sidelink service, a sidelink data, a sidelink control information and / or a sidelink transport block (TB). For example, the sidelink information may be sent via PSSCH and / or PSCCH.

[0124] In addition, when the UE performs sidelink communication based on TDD operation, the base station may allocate some of the UL slots / symbols, flexible slots / symbols, or DL ​​slots / symbols as sidelink slots / symbols. In this case, for example, the in-coverage (INC) UE can directly receive information related to the configuration of the TDD slots corresponding to the UL slots / symbols, flexible slots / symbols, DL slots / symbols, or sidelink slots / symbols among all resources from the base station. The out-of-coverage (OOC) UE can determine the sidelink slot / symbol based on the information related to the preconfigured TDD slot configuration, and the OOC UE can perform sidelink communication. Therefore, when the base station reconfigures the information related to the TDD slot configuration (which is different from the information related to the preconfigured TDD slot configuration), since the information related to the TDD slot configuration is different between the INC UE and the OOC UE, it may be difficult to perform sidelink communication between the INC UE and the OOC UE.

[0125] The present disclosure proposes a method for sending information related to TDD time slot configuration through a PSBCH payload in an S-SSB, which is used as a synchronization signal in side link communication. According to the proposed method, for example, an OOC UE can select an INC UE as a reference synchronization source. The OOC UE can receive information related to the changed TDD time slot configuration through a PSBCH payload in an S-SSB sent by the INC UE. The OOC UE again sends information related to the changed TDD time slot configuration to a neighboring device, and as a result, the same information related to the TDD time slot configuration can be used between the OOC UE and the INC UE.

[0126] For example, the PSBCH payload may be configured with a MIB configured by a high layer and a part configured by a physical layer. Hereinafter, in this specification, these two parts may be collectively referred to as the PSBCH payload. For example, resources used for sidelink communication may be divided into resources for sending S-SSB and resources for sending other channels such as PSCCH / PSSCH / PSFCH. In the case of resources for sending other channels such as PSCCH / PSSCH / PSFCH, the base station may configure resources for sending other channels such as PSCCH / PSSCH / PSFCH through configurations related to the sidelink resource pool. In addition, UEs may send and receive configuration information related to the sidelink resource pool between UEs. Hereinafter, various embodiments related to a method for a UE to send information related to a TDD time slot configuration via a PSBCH will be described.

[0127] According to an embodiment of the present disclosure, the UE may exclude resources for sending S-SSB from the side link resource pool and may send S-SSB independently. For example, resources in the time domain and frequency domain for sending S-SSB may be preconfigured by high-level signaling. For example, resources for sending other channels such as PSCCH / PSSCH / PSCH other than S-SSB may be preconfigured as a side link resource pool by high-level signaling.

[0128] For example, the UE may send information related to the side link resource pool preconfigured by high-level signaling through the PSBCH. For example, the UE may send information related to the preconfigured side link resource pool in the form of a bitmap. For example, the side link resource pool may be preconfigured by high-level signaling, and the UE may send information about the time slots / symbols to which the side link resource pool may be applied, among the information related to all TDD time slot configurations, through the PSBCH. For example, the UE may send information about the time slots / symbols to which the side link resource pool may be applied, among the information related to all TDD time slot configurations, through the PSBCH in the form of a bitmap. In this case, for example, the bitmap may be configured to a subframe level, a time slot level, or a symbol level.

[0129] In this way, when the S-SSB is excluded from the sidelink resource pool, for example, the UE can send the S-SSB through all symbols of the time slot allocated for sidelink communication. In addition, the UE can send the remaining sidelink communication related signals through some or all symbols of the time slot allocated to the sidelink communication. In this case, for example, all sidelink time slots except the resources used to send the S-SSB can be preconfigured to use the same number of symbols. In this case, for example, the position of the symbol in a sidelink time slot can be sent to the UE. For example, the position of the symbol in a sidelink time slot can be sent to the UE as a symbol-level bitmap.

[0130] Therefore, the UE can send information related to the entire TDD time slot configuration including all UL / flexible / DL / side link resources through the PSBCH. In addition, information related to the side link resource pool can be sent to the UE through high-layer signaling. Alternatively, the UE can directly send information related to the side link resource pool through the PSBCH.

[0131] According to an embodiment of the present disclosure, the S-SSB may be preconfigured for the UE to include configuration information related to the side link resource pool. For example, the UE may use all symbols in a time slot as resources for side link communication. For example, the UE may use some symbols in a time slot as resources for side link communication. For example, when the UE always uses all symbols in a time slot to send an S-SSB, as an exception, the UE may use all symbols in a time slot to send an S-SSB regardless of the configuration information related to the side link resource pool.

[0132] According to an embodiment of the present disclosure, when only some symbols in a time slot for side link communication are used for side link communication, the UE can use a bitmap to signal the position of the side link symbol in a time slot through PSBCH. For example, in order to reduce signaling overhead, the position of the side link symbol can be sent by jointly encoding the position of the start symbol and the number (L) of the side link symbol. In this case, all side link symbols in a time slot can be located continuously.

[0133] For example, the maximum number of symbols in one slot may be Lmax. For example, in the case of the following formula 1, when the normal CP length is used, Lmax=14, and when the extended CP length is used, Lmax=12. As shown in Table 5 below, for example, when the UE uses joint coding (start and length indication value (SLIV)), signaling overhead may be reduced.

[0134] [Table 5]

[0135] if

[0136] SLIV=L max (L-1)+S

[0137] otherwise

[0138] SLIV=L max (L max -L+1)+(L max -1-S)

[0139] In this case, for example, the bit value required for joint encoding may be determined as in the following Equation 1. For example, in the case of the above-mentioned embodiment, a total of 7 bits may be required.

[0140] [Formula 1]

[0141]

[0142] For example, the symbol for the sidelink communication may always start from the start symbol of the time slot. For example, the symbol for the sidelink communication may always end at the last symbol of the time slot. In this case, the UE may only notify information related to the number of symbols without notifying information about the position of the start symbol. In this case, for example, since the maximum value of the number of symbols in one time slot is 14, the UE may signal information related to the structure of the sidelink time slot by using a total of 4 bits.

[0143] According to an embodiment of the present disclosure, the UE may send information about the position of the sidelink time slot for sidelink communication among all time slots in the time domain for UL / flexible / DL / sidelink communication through PSBCH. In addition, for each sidelink time slot, information about the position of the sidelink symbol for sidelink communication among all symbols in the sidelink time slot may be preconfigured for the UE. For example, the UE may send information about the position of the sidelink time slot for sidelink communication among all time slots for UL / flexible / DL / sidelink communication through PSBCH, and the UE may send information about the position of the sidelink symbol among all symbols included in the sidelink time slot for each sidelink time slot. In the following, for example, the preconfigured value may be a configuration value installed when manufacturing a product or a value sent in advance from a server or a network device. For example, the preconfigured information may be configuration information that the OOC UE may install and use in advance even if it does not have a connection with a base station (e.g., a connection with a base station through a relay of a different UE).

[0144] According to an embodiment of the present disclosure, information about the position of a sidelink time slot for sidelink communication among all time slots in a time domain for UL / flexible / DL / sidelink communication may be preconfigured for the UE. In addition, the UE may use preconfigured information about the position of the sidelink time slot. For example, the UE may send information about the position of a sidelink symbol for sidelink communication among all symbols in the sidelink time slot for each sidelink time slot via the PSBCH. For example, information about the position of a sidelink time slot among all time slots for UL / flexible / DL / sidelink communication may be preconfigured for the UE. For example, the UE may send information about the position of a sidelink symbol among all symbols in the sidelink time slot for each sidelink time slot via the PSBCH.

[0145] In this case, for example, as information on the position of a side link slot or a side link symbol, a bitmap indicating a specific position within one cycle may be used.

[0146] For example, it can be assumed that the side link time slot or side link symbol is continuously sent at any position. In this case, the UE can notify the position of the starting time slot or starting symbol and the number of continuous time slots or continuous symbols by joint coding. For example, it can be assumed that the continuous time slots or continuous symbols that always start from the starting time slot or starting symbol are sent within a cycle or time slot. In this case, the UE can only notify the number of continuous time slots or continuous symbols. For example, it can be assumed that the continuous time slots or continuous symbols that always include the last time slot or the last symbol are always sent within a cycle or time slot. In this case, the UE can only notify the number of continuous time slots or continuous symbols. For example, when the UE only notifies the number of continuous time slots or continuous time slots, the UE can signal whether it includes the starting time slot or starting symbol within a cycle or time slot or the last time slot or the last symbol within a cycle or time slot. For example, when sending information about the number of continuous time slots or continuous time slots, the UE can signal separately whether it includes the starting time slot or starting symbol within a cycle or time slot or the last time slot or the last symbol within a cycle or time slot.

[0147] According to an embodiment of the present disclosure, the configuration information may include: information related to TDD time slot configuration classified as UL, DL and flexible use of the base station for all time slots (hereinafter, first information); information related to the configuration of candidate time slots that can be used for side link communication relative to the TDD time slot configuration of the first information (hereinafter, second information); information related to the configuration of side link time slots constituting any resource pool relative to the candidate side link time slot configuration of the second information (hereinafter, third information); information related to the configuration of side link symbols to be applied to each time slot relative to the candidate side link time slot configuration of the second information (hereinafter, fourth information); and information related to the configuration of side link symbols to be applied to each time slot relative to the side link time slot configuration constituting the resource pool relative to the third information (hereinafter, fifth information). For example, a candidate time slot may replace one or more candidate time slots.

[0148] For example, in the configuration information, information related to resource pool configuration can be configured as a value preconfigured for the UE through high-layer signaling, and the common configuration of all resource pools at the system level can be preconfigured for the UE. In addition, the UE can send the common configuration of all resource pools through the PSBCH payload.

[0149] For example, information related to resource pool configuration may be preconfigured for the UE, and the UE may send the information related to resource pool configuration via PSBCH payload. In addition, a common configuration of all resource pools at the system level may be configured for the UE via higher layer signaling as a preconfigured value.

[0150] According to an embodiment of the present disclosure, the UE may send each of the preconfigured values ​​and the PSBCH payload as resource pool information. For example, the third information and the fifth information may be configured as preconfigured values ​​as resource pool information. For example, the UE may configure the third information and the fifth information as preconfigured values ​​as resource pool information. In addition, the UE sends the first information, the second information, and the fourth information via the PSBCH payload. Alternatively, by combining the first information and the second information, the UE may send the configuration of the candidate time slots to which the side link communication may be applied among all time slots. For example, the candidate time slot may replace one or more candidate time slots.

[0151] For example, the UE may send the third information and the fifth information via the PSBCH payload. In addition, the first information, the second information, and the fourth information may be configured as preconfigured values ​​as resource pool information. For example, by combining the first information and the second information, the configuration of the candidate time slots to which the side link communication can be applied among all time slots may be configured as preconfigured values ​​as resource pool information. For example, the UE may configure the first information, the second information, and the fourth information as preconfigured values ​​as resource pool information. For example, by combining the first information and the second information, the UE may configure the configuration of the candidate time slots to which the side link communication can be applied among all time slots as preconfigured values ​​as resource pool information. For example, a candidate time slot may replace one or more candidate time slots.

[0152] According to an embodiment of the present disclosure, all the second information, third information, fourth information and fifth information as configuration information related to the side link communication may be configured as pre-configured values ​​as resource pool information. For example, the UE may configure the second information, the third information, the fourth information and the fifth information as pre-configured values ​​as resource pool information. In addition, the UE may send the first information via the PSBCH.

[0153] For example, the UE may send all the second information, the third information, the fourth information, and the fifth information as configuration information related to the side link communication via the PSBCH. In addition, the UE may configure the first information as a preconfigured value as resource pool information. For example, the first information may be configured as a preconfigured value as resource pool information.

[0154] According to an embodiment of the present disclosure, the same side link symbol configuration may be applied to all side link time slots used for side link communication. For example, the UE may apply the same side link symbol configuration to all side link time slots used for side link communication. For example, all side link time slots may be side link time slots in which S-SSB related resources are excluded. In addition, by combining the fourth information and the fifth information, the UE may configure the side link symbol configuration.

[0155] For example, the UE may configure the third information as a preconfigured value as resource pool information. For example, the third information may be configured as a preconfigured value as resource pool information. In addition, the UE may send the first information and the second information via the PSBCH payload. For example, by combining the first information and the second information, the UE may send the configuration of the candidate time slots to which the side link communication may be applied among all time slots via the PSBCH payload. In addition, the UE may send the fourth information and the fifth information via the PSBCH payload. For example, the UE may send a common side link symbol configuration applied to all side link time slots by combining the fourth information and the fifth information via the PSBCH payload. For example, all side link time slots may be side link time slots in which S-SSB related resources are excluded. For example, a candidate time slot may replace one or more candidate time slots.

[0156] For example, the UE may send the third information via the PSBCH payload. In addition, for example, the UE may configure the first information and the second information as preconfigured values ​​as resource pool information. For example, by combining the first information and the second information, the UE may configure the candidate time slots to which the side link communication may be applied among all time slots as preconfigured values ​​as candidate time slots for resource pool information. In addition, for example, the UE may configure the fourth information and the fifth information as preconfigured values ​​as resource pool information. For example, by combining the fourth information and the fifth information, the UE may configure the common side link symbol configuration applied to all side link time slots as preconfigured values ​​as resource pool information. For example, all side link time slots may be side link time slots in which S-SSB related resources are excluded. For example, the first information and the second information may be configured as preconfigured values ​​as resource pool information. For example, by combining the first information and the second information, the candidate time slots to which the side link communication may be applied among all time slots may be configured as preconfigured values ​​as resource pool information. In addition, for example, the fourth information and the fifth information may be configured as preconfigured values ​​as resource pool information. For example, by combining the fourth information and the fifth information, the common side link symbol configuration applied to all side link time slots can be configured as a preconfigured value as resource pool information. For example, all side link time slots can be side link time slots in which S-SSB related resources are excluded. For example, a candidate time slot can replace one or more candidate time slots.

[0157] According to an embodiment of the present disclosure, information about the side link time slot configuration and information about the side link symbol configuration may be sent respectively. For example, the UE may configure the first information, the second information, and the third information as preconfigured values ​​as resource pool information. For example, by combining the first information and the second information, the UE may configure the candidate time slots to which the side link communication may be applied among all time slots as preconfigured values ​​as resource pool information. For example, the first information, the second information, and the third information may be configured as preconfigured values ​​as resource pool information. For example, by combining the first information and the second information, the candidate time slots to which the side link communication may be applied among all time slots may be configured as preconfigured values ​​as resource pool information. In addition, for example, the UE may send the fourth information and the fifth information via the PSBCH payload. For example, the UE may send a common side link symbol configuration applied to all side link time slots by combining the fourth information and the fifth information via the PSBCH payload. For example, all side link time slots may be side link time slots in which S-SSB related resources are excluded. For example, a candidate time slot may replace one or more candidate time slots.

[0158] For example, the UE may send the first information, the second information, and the third information via the PSBCH payload. For example, by combining the first information and the second information, the UE may send the configuration of the candidate time slots to which the side link communication may be applied among all time slots via the PSBCH payload. In addition, for example, the UE may configure the fourth information and the fifth information as preconfigured values ​​as resource pool information. For example, by combining the fourth information and the fifth information, the UE may configure the common side link symbol configuration applied to all side link time slots as preconfigured values ​​as resource pool information. For example, all side link time slots may be side link time slots in which S-SSB related resources are excluded. For example, the fourth information and the fifth information may be configured as preconfigured values ​​as resource pool information. For example, by combining the fourth information and the fifth information, the common side link symbol configuration applied to all side link time slots may be configured as preconfigured values ​​as resource pool information. For example, a candidate time slot may replace one or more candidate time slots.

[0159] According to an embodiment of the present disclosure, the configuration of the preconfigured value as resource pool information and the transmission using the PSBCH payload can be performed. For example, the UE can configure the first information and the second information as preconfigured values ​​as resource pool information. For example, by combining the first information and the second information, the UE can configure the candidate time slots to which the side link communication can be applied among all time slots as preconfigured values ​​as resource pool information. For example, the first information and the second information can be configured as preconfigured values ​​as resource pool information. For example, by combining the first information and the second information, the candidate time slots to which the side link communication can be applied among all time slots can be configured as preconfigured values ​​as resource pool information. In addition, for example, the UE can send the third information, the fourth information, and the fifth information through the PSBCH payload. For example, the UE can send a common side link symbol configuration applied to all side link time slots by combining the fourth information and the fifth information through the PSBCH payload. For example, all side link time slots can be side link time slots in which S-SSB related resources are excluded. For example, a candidate time slot can replace one or more candidate time slots.

[0160] For example, the UE may send the first information and the second information via the PSBCH payload. For example, by combining the first information and the second information, the UE may send the configuration of the candidate time slots to which the side link communication may be applied among all time slots via the PSBCH payload. In addition, for example, the UE may configure the third information, the fourth information, and the fifth information as preconfigured values ​​as resource pool information. For example, by combining the fourth information and the fifth information, the UE may configure the common side link symbol configuration applied to all side link time slots as preconfigured values ​​as resource pool information. For example, all side link time slots may be side link time slots in which S-SSB related resources are excluded. For example, the third information, the fourth information, and the fifth information may be configured as preconfigured values ​​as resource pool information. For example, by combining the fourth information and the fifth information, the common side link symbol configuration applied to all side link time slots may be configured as preconfigured values ​​as resource pool information. For example, a candidate time slot may replace one or more candidate time slots.

[0161] According to an embodiment of the present disclosure, for each combination of the above-mentioned first to fifth information, the UE may send the resource configuration information sent as a PSBCH payload as is, and the resource pool information may include the resource configuration information sent via the PSBCH payload and the pre-configured resource configuration information as resource pool information.

[0162] For example, the UE may send candidate resources that can be used for side link communication among all resources through the PSBCH payload. For example, the PSBCH payload may be preconfigured or configured for the UE through high-level signaling. In this case, for example, the configuration information of the candidate side link resources may be information that is commonly applied to a cell or system. For example, the configuration information of the candidate side link resources may be information in units of time slots. Alternatively, for example, the configuration information of the candidate side link resources may be information including time slot units and symbol units.

[0163] For example, the resource pool information preconfigured by high-level signaling may include candidate side link resource configuration information (e.g., candidate side link resource configuration information sent via a PSBCH payload), time slot level bitmap information constituting the actual side link resource pool, and symbol configuration for the time slots constituting the actual side link resource pool (e.g., the number and position of symbols in the side link time slots, the distribution of continuous or non-continuous side link symbols).

[0164] For example, based on the candidate side link resource information sent through the PSBCH payload, the UE may actually send side link resource pool information for side link communication. For example, the resources constituting the actual side link resource pool may be specified in the form of a bitmap for the candidate side link resources. In this case, for example, when the candidate side link resource is information configured in units of time slots, the information constituting the side link resource pool may include a bitmap in units of time slots.

[0165] For example, all side link time slots constituting the side link resource pool may have the same symbol configuration. That is, for example, the number and position of side link symbols used for side link communication in one side link time slot may be fixed, and the same symbol configuration may be applied to all side link time slots.

[0166] In this case, for example, the side link symbols in the side link time slot may be composed of continuous symbols or non-continuous symbols. For example, in the case where continuous symbols are configured, configuration information related to the continuous symbols may be efficiently signaled according to various embodiments of the present disclosure. For example, when non-continuous symbols are configured, the configuration information may be signaled in the form of a bitmap.

[0167] In various embodiments of the present disclosure, the number of side link symbols applied to the side link time slot may be different based on whether PSFCH is sent. More specifically, for example, regardless of whether PSFCH is sent, the number of side link symbols constituting PSCCH and PSSCH may be the same for all side link time slots. For example, all side link time slots may not include resources related to S-SSB. Therefore, the reception coverage of PSCCH and PSSCH may not be different according to the side link time slot. In this case, for example, when PSFCH is sent, the side link symbols required for PSFCH transmission may be additionally allocated to the side link time slot. In this case, for example, for all side link time slots except S-SSB, the number of side link symbols required for PSFCH transmission may be the same. For example, based on the amount of data to be sent by PSFCH, the number of side link symbols required for PSFCH transmission may be different for each side link time slot. In this case, for example, the number of side link symbols to be used for PSFCH may be preconfigured by high-level signaling.

[0168] In the present disclosure, INC UE and OOC UE can share the same information related to TDD time slot configuration. In order to perform sidelink communication based on resources consisting of sidelink time slots / symbols configured for sidelink communication, the UE can efficiently send information related to TDD time slot configuration through PSBCH.

[0169] In addition, when the UE does not use the same number of symbols for sidelink communication in all sidelink time slots except for the resources used to send S-SSB, signaling overhead problems may occur because the base station or UE needs to send information related to the symbols used in each time slot.

[0170] For example, a group of time slots included in the side link resource pool may be all time slots except time slots in which S-SSB is configured and non-side link time slots. For example, a non-side link time slot may be a time slot in which at least one of the Nth symbol to the N+M-1th OFDM symbol is not semi-statically configured as a UL symbol according to a parameter of a higher layer. In this document, for example, the UE may receive at least one of information related to the N value or information related to the M value from the base station. For example, N may be the position of the side link start symbol, and M may be the length or number of the side link symbols.

[0171] Fig.12 A process for a transmitting UE to transmit a PSSCH to a receiving UE based on information related to a TDD timeslot configuration according to an embodiment of the present disclosure is shown. Fig.12 It can be combined with various embodiments of the present disclosure.

[0172] Reference Fig.12In step S1210, the transmitting UE may receive information related to the TDD time slot configuration. For example, the transmitting UE may receive information related to the TDD time slot configuration from the base station. For example, the transmitting UE may receive information related to the TDD time slot configuration from the receiving UE.

[0173] In step S1220, the transmitting UE may transmit an S-SSB to the receiving UE. For example, the S-SSB may include a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS), and a physical sidelink broadcast channel (PSBCH). For example, resources for transmitting the S-SSB may be configured by a higher layer for the transmitting UE. For example, resources for transmitting the S-SSB may include resources in the frequency domain and the time domain.

[0174] For example, the transmitting UE may send information related to the side link resource pool preconfigured by the high layer to the receiving UE via PSBCH. For example, the preconfigured information related to the side link resource pool may be in the form of a bitmap. For example, the transmitting UE may send information related to the TDD time slot configuration to the receiving UE via PSBCH. For example, the transmitting UE may send information about the side link time slot or side link symbol included in the side link resource pool among the information related to the TDD time slot configuration to the receiving UE via PSBCH. For example, the information about the side link time slot or side link symbol included in the side link resource pool among the information related to the TDD time slot configuration may be in the form of a bitmap. For example, the bitmap may be configured based on any one of a subframe, a time slot or a symbol. For example, the bitmap may be configured based on any one of a subframe unit, a time slot unit or a symbol unit.

[0175] In step S1230, the transmitting UE may send a PSSCH to the receiving UE based on information related to the TDD slot configuration. For example, the candidate resource to which the bitmap associated with the side link resource pool is applied may be configured based on information related to the TDD slot configuration. For example, the candidate resource may include one or more slots. For example, configuration information related to the side link symbol included in each slot in one or more slots may be received. For example, the configuration information related to the side link symbol may include information related to the position of the side link symbol. For example, the position of the side link symbol may be configured identically for the candidate resource. For example, the information related to the TDD slot configuration may include at least one of the UL slot / symbol, the DL slot / symbol, or the SL slot / symbol. For example, the UL slot / symbol included in the information related to the TDD slot configuration may be configured as a candidate resource to which the bitmap associated with the side link resource pool is applied.

[0176] For example, the transmitting UE may receive information related to the position of the side link symbol included in each of the one or more time slots. For example, the transmitting UE may receive information related to the position of the side link symbol included in each of the one or more time slots from the base station. For example, information related to the position of the side link symbol included in each of the one or more time slots may be preconfigured for the transmitting UE. For example, the information related to the position of the side link symbol included in each of the one or more time slots may be in the form of a bitmap. For example, the bitmap may be configured based on symbols. For example, the bitmap may be configured based on symbol units.

[0177] Fig.13 An example in which side link symbols are allocated in side link slots according to an embodiment of the present disclosure is shown. Fig.14 An example of time slots excluded from the side link time slots according to an embodiment of the present disclosure is shown. Fig.13 and Fig.14 It can be combined with various embodiments of the present disclosure.

[0178] For example, the transmitting UE may receive information related to the TDD time slot configuration from the base station. The transmitting UE may use a side link time slot based on the information related to the TDD time slot configuration to send a PSSCH to the receiving UE. In this case, for example, at least one UL time slot among the multiple time slots included in the information related to the TDD time slot configuration may be allocated as a side link time slot. For example, the UL time slot may be determined by the UE based on a parameter signaled from a higher layer. For example, the parameter may include a starting symbol of a side link symbol or the length or number of side link symbols.

[0179] Reference Fig.13 , a time slot may include multiple symbols. For example, a time slot may include 14 symbols. The purpose of each symbol of a time slot may be determined based on the TDD time slot configuration. For example, when the transmitting UE may determine the starting symbol of the side link symbol as symbol #10 based on the parameters signaled from the higher layer and determine that the number of side link symbols is 4, if symbols #10 to symbol #13 are UL symbols, the transmitting UE may use symbols #10 to #13 as side link symbols. That is, the transmitting UE may use Fig.13The time slot of the sidelink symbol is used as the sidelink time slot, and the transmitting UE can send the PSSCH to the receiving UE on the sidelink time slot. For example, the number of sidelink symbols in one time slot signaled from the higher layer can be less than or equal to the number of preconfigured UL symbols in one time slot. For example, based on the position of the sidelink symbol signaled from the higher layer and the number of sidelink symbols, the transmitting UE can determine the duration of the sidelink symbol. When the symbols in the duration of the sidelink symbol consist of UL symbols, the transmitting UE can send the PSSCH to the receiving UE in the duration of the sidelink symbol.

[0180] Reference Fig.14 , when the transmitting UE can determine the starting symbol of the side link symbol as symbol #10 based on the parameters signaled from the higher layer and determine that the number of side link symbols is 4, if there is a symbol for a purpose different from the UL symbol among the symbols #10 to #13, the transmitting UE cannot use the time slot including the symbol as the side link time slot. That is, Fig.14 The time slot cannot be used as a sidelink time slot by the UE. For example, based on the position of the sidelink symbol and the number of sidelink symbols signaled from the higher layer, the transmitting UE can determine the duration of the sidelink symbol in one time slot. In this case, when the symbols in the sidelink symbol duration in one time slot consist of symbols used for different purposes other than UL symbols (e.g., DL symbols (symbol #11, symbol #13)), the one time slot cannot be used as a sidelink time slot.

[0181] Fig.15 A method for a first device to transmit a PSSCH to a second device based on information related to a TDD time slot configuration according to an embodiment of the present disclosure is shown. Fig.15 It can be combined with various embodiments of the present disclosure.

[0182] Reference Fig.15 In step S1510, the first device 100 may receive information related to time division duplex (TDD) time slot configuration. For example, the first device 100 may receive information related to TDD time slot configuration from a base station. For example, the first device 100 may receive information related to TDD time slot configuration from a second device 200.

[0183] In step S1520, the first device 100 may send a sidelink synchronization signal block (S-SSB) to the second device 200. For example, the S-SSB may include a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS), and a physical sidelink broadcast channel (PSBCH). For example, resources for sending the S-SSB may be preconfigured by a higher layer. For example, resources for sending the S-SSB may include resources in the frequency domain and the time domain.

[0184] For example, the first device 100 may send information related to the side link resource pool preconfigured by the higher layer to the second device 200 via the PSBCH. For example, the information related to the preconfigured side link resource pool may be in the form of a bitmap. For example, the first device 100 may send information related to the TDD time slot configuration to the second device 200 via the PSBCH. For example, the first device 100 may send information about the side link time slot or side link symbol included in the side link resource pool among the information related to the TDD time slot configuration to the second device 200 via the PSBCH. For example, the information about the side link time slot or side link symbol included in the side link resource pool among the information related to the TDD time slot configuration may be in the form of a bitmap. For example, the bitmap may be configured based on any one of a subframe unit, a time slot unit, or a symbol unit.

[0185] In step S1530, the first device 100 may send a PSSCH to the second device 200 based on information related to the TDD slot configuration. For example, the candidate resource to which the bitmap associated with the side link resource pool is applied may be configured based on information related to the TDD slot configuration. For example, the candidate resource may include one or more slots. For example, configuration information related to the side link symbol included in each of the one or more slots may be received. For example, the configuration information related to the side link symbol may include information related to the position of the side link symbol. For example, the position of the side link symbol may be configured to be the same for the candidate resource. For example, the information related to the TDD slot configuration may include at least one of a UL slot / symbol, a DL slot / symbol, or a SL slot / symbol. For example, the UL slot / symbol included in the information related to the TDD slot configuration may be configured as a candidate resource to which the bitmap associated with the side link resource pool is applied.

[0186] For example, the first device 100 may receive information related to the position of the side link symbol included in each of the one or more time slots. For example, the first device 100 may receive information related to the position of the side link symbol included in each of the one or more time slots from the base station. For example, the information related to the position of the side link symbol included in each of the one or more time slots may be preconfigured. For example, the information related to the position of the side link symbol included in each of the one or more time slots may be in the form of a bitmap. For example, the bitmap may be configured based on symbol units.

[0187] For example, the configuration information related to the side link symbol may also include information related to the number of the side link symbols. For example, the number of the side link symbols may be configured to be the same for the candidate resources.

[0188] For example, the side link resource pool may be configured based on the candidate resources. For example, resources used to send S-SSB may not be included in the side link resource pool.

[0189] The above embodiments may be applied to various devices to be described below. First, for example, the processor 102 of the first device 100 may control the transceiver 106 to receive information related to a time division duplex (TDD) time slot configuration. In addition, for example, the processor 102 of the first device 100 may control the transceiver 106 to send a side link synchronization signal block (S-SSB) to the second device 200. In addition, for example, the processor 102 of the first device 100 may control the transceiver 106 to send a PSSCH to the second device 200 based on the information related to the TDD time slot configuration.

[0190] According to an embodiment of the present disclosure, a first device configured to perform wireless communication may be provided. For example, the first device may include: one or more memories storing instructions; one or more transceivers; and one or more processors connected to the one or more memories and the one or more transceivers. For example, one or more processors may execute instructions to: receive information related to a time division duplex (TDD) time slot configuration; send a side link synchronization signal block (S-SSB) to a second device, wherein the S-SSB includes a side link primary synchronization signal (S-PSS), a side link secondary synchronization signal (S-SSS), and a physical side link broadcast channel (PSBCH); based on information related to the TDD time slot configuration, send a physical side link shared channel (PSSCH) to the second device. For example, the candidate resources to which the bitmap associated with the side link resource pool is applied are configured based on information related to the TDD time slot configuration. For example, the candidate resources include one or more time slots. For example, configuration information related to the side link symbol included in each time slot of the one or more time slots is received. For example, the configuration information related to the side link symbol includes information related to the position of the side link symbol. For example, the positions of the side link symbols are configured to be the same for the candidate resources.

[0191] According to an embodiment of the present disclosure, a device configured to control a first user equipment (UE) may be provided. For example, the device may include: one or more processors; and one or more memories operably connected to the one or more processors and storing instructions. For example, one or more processors may execute instructions to: receive information related to a time division duplex (TDD) slot configuration; send a sidelink synchronization signal block (S-SSB) to a second UE, wherein the S-SSB includes a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS), and a physical sidelink broadcast channel (PSBCH); based on information related to the TDD slot configuration, send a physical sidelink shared channel (PSSCH) to the second UE. For example, the candidate resources to which the bitmap associated with the sidelink resource pool is applied are configured based on information related to the TDD slot configuration. For example, the candidate resources include one or more slots. For example, configuration information related to the sidelink symbol included in each of the one or more slots is received. For example, the configuration information related to the sidelink symbol includes information related to the position of the sidelink symbol. For example, the positions of the side link symbols are configured to be the same for the candidate resources.

[0192] According to an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, when the instruction is executed, the first device: receives information related to the time division duplex (TDD) time slot configuration; sends a side link synchronization signal block (S-SSB) to the second device, wherein the S-SSB includes a side link primary synchronization signal (S-PSS), a side link secondary synchronization signal (S-SSS) and a physical side link broadcast channel (PSBCH); based on the information related to the TDD time slot configuration, sends a physical side link shared channel (PSSCH) to the second device. For example, the candidate resources to which the bitmap associated with the side link resource pool is applied are configured based on information related to the TDD time slot configuration. For example, the candidate resources include one or more time slots. For example, configuration information related to the side link symbols included in each of the one or more time slots is received. For example, the configuration information related to the side link symbols includes information related to the position of the side link symbols. For example, the position of the side link symbols is configured to be the same for the candidate resources.

[0193] Fig.16 A method for a second device to receive a PSSCH from a first device based on information related to a TDD time slot configuration according to an embodiment of the present disclosure is shown. Fig.16 It can be combined with various embodiments of the present disclosure.

[0194] Reference Fig.16In step S1610, the second device 200 may receive information related to TDD time slot configuration. For example, the second device 200 may receive information related to TDD time slot configuration from a base station. For example, the second device 200 may receive information related to TDD time slot configuration from the first device 100.

[0195] In step S1620, the second device 200 may receive an S-SSB from the first device 100. For example, the S-SSB may include a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS), and a physical sidelink broadcast channel (PSBCH). For example, resources for transmitting the S-SSB may be preconfigured by a higher layer. For example, resources for transmitting the S-SSB may include resources in the frequency domain and the time domain.

[0196] For example, the second device 200 may receive information related to the side link resource pool preconfigured by the higher layer from the first device 100 via the PSBCH. For example, the information related to the preconfigured side link resource pool may be in the form of a bitmap. For example, the second device 200 may receive information related to the TDD time slot configuration from the first device 100 via the PSBCH. For example, the second device 200 may receive information about the side link time slot or side link symbol included in the side link resource pool from the first device 100 via the PSBCH, among the information related to the TDD time slot configuration. For example, the information about the side link time slot or side link symbol included in the side link resource pool from the information related to the TDD time slot configuration may be in the form of a bitmap. For example, the bitmap may be configured based on any one of a subframe unit, a time slot unit, or a symbol unit.

[0197] In step S1630, the second device 200 may receive the PSSCH from the first device 100 based on the information related to the TDD slot configuration. For example, the candidate resource to which the bitmap associated with the side link resource pool is applied may be configured based on the information related to the TDD slot configuration. For example, the candidate resource may include one or more slots. For example, configuration information related to the side link symbol included in each of the one or more slots may be received. For example, the configuration information related to the side link symbol may include information related to the position of the side link symbol. For example, the position of the side link symbol may be configured to be the same for the candidate resource. For example, the information related to the TDD slot configuration may include at least one of the UL slot / symbol, the DL slot / symbol, or the SL slot / symbol. For example, the UL slot / symbol included in the information related to the TDD slot configuration may be configured as a candidate resource to which the bitmap associated with the side link resource pool is applied.

[0198] For example, the configuration information related to the side link symbol may also include information related to the number of the side link symbols. For example, the number of the side link symbols may be configured to be the same for the candidate resources.

[0199] For example, the side link resource pool may be configured based on the candidate resources. For example, resources used to send S-SSB may not be included in the side link resource pool.

[0200] The above-mentioned embodiments can be applied to various devices to be described below. First, for example, the processor 202 of the second device 200 can control the transceiver 206 to receive information related to the TDD time slot configuration. In addition, for example, the processor 202 of the second device 200 can control the transceiver 206 to receive the S-SSB from the first device 100. In addition, for example, the processor 202 of the second device 200 can control the transceiver 206 to receive the PSSCH from the first device 100 based on the information related to the TDD time slot configuration.

[0201] According to an embodiment of the present disclosure, a second device configured to perform wireless communication may be provided. For example, the second device may include: one or more memories storing instructions; one or more transceivers; and one or more processors connected to the one or more memories and the one or more transceivers. For example, one or more processors may execute instructions to: receive information related to time division duplex (TDD) time slot configuration; receive a side link synchronization signal block (S-SSB) from a first device, wherein the S-SSB includes a side link primary synchronization signal (S-PSS), a side link secondary synchronization signal (S-SSS), and a physical side link broadcast channel (PSBCH); based on information related to the TDD time slot configuration, receive a physical side link shared channel (PSSCH) from a first device. For example, the candidate resources to which the bitmap associated with the side link resource pool is applied are configured based on information related to the TDD time slot configuration. For example, the candidate resources include one or more time slots. For example, configuration information related to the side link symbol included in each time slot of one or more time slots is received. For example, the configuration information related to the side link symbol includes information related to the position of the side link symbol. For example, the positions of the side link symbols are configured to be the same for the candidate resources.

[0202] Hereinafter, devices to which respective embodiments of the present disclosure can be applied will be described.

[0203] The various descriptions, functions, processes, proposals, methods and / or operational flows of the present disclosure described in this document may be applied to, but not limited to, various fields requiring wireless communication / connection between devices (e.g., 5G).

[0204] Hereinafter, a description will be given in more detail with reference to the accompanying drawings. In the following drawings / descriptions, unless otherwise described, the same reference numerals may represent the same or corresponding hardware blocks, software blocks or functional blocks.

[0205] Fig.17 A communication system (1) according to an embodiment of the present disclosure is shown.

[0206] Reference Fig.17 , a communication system (1) to which various embodiments of the present disclosure are applied includes a wireless device, a base station (BS), and a network. Herein, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G new RAT (NR) or long term evolution (LTE)), and may be referred to as a communication / radio / 5G device. The wireless device may include, but is not limited to, a robot (100a), a vehicle (100b-1, 100b-2), an extended reality (XR) device (100c), a handheld device (100d), a home appliance (100e), an Internet of Things (IoT) device (100f), and an artificial intelligence (AI) device / server (400). For example, a vehicle may include a vehicle with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing inter-vehicle communication. Herein, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of head mounted devices (HMD), head up displays (HUD) installed in vehicles, televisions, smart phones, computers, wearable devices, home appliance devices, digital signage, vehicles, robots, etc. Handheld devices may include smart phones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device (200a) may operate as a BS / network node relative to other wireless devices.

[0207] In this article, the wireless communication technology implemented in the wireless device of the present specification may include narrowband Internet of Things for low power communication and LTE, NR and 6G. In this case, for example, NB-IoT technology may be an example of low power wide area network (LPWAN) technology, and may be implemented in standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the aforementioned name. Additionally or alternatively, the wireless communication technology implemented in the wireless device of the present specification may perform communication based on LTE-M technology. In this case, as an example, LTE-M technology may be an example of LPWAN technology, and may be referred to as various names, such as enhanced machine type communication (eMTC). LTE-M technology may be implemented in at least one of 1) LTECAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-bandwidth limited (non-BL), 5) LTE-MTC, 6) LTE machine type communication and / or 7) LTE M, and is not limited to the aforementioned name. Additionally or alternatively, the wireless communication technology implemented in the wireless device of the present specification may include at least one of ZigBee, Bluetooth and low power wide area network (LPWAN), and is not limited to the aforementioned name. For example, ZigBee technology may create a personal area network (PAN) related to small / low-power digital communications based on various standards such as IEEE 802.15.4, and may be referred to by various names.

[0208] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. The AI ​​technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI ​​server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., side link communication) with each other without passing through the BS / network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0209] Wireless communication / connection 150a, 150b or 150c can be established between wireless devices 100a to 100f / BS200 or BS200 / BS200. Here, the wireless communication / connection can be established through various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication) or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). The wireless device and the BS / wireless device can send / receive radio signals to / from each other through wireless communication / connection 150a and 150b. For example, wireless communication / connection 150a and 150b can send / receive signals through various physical channels. To this end, various configuration information configuration processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation and resource mapping / demapping) and at least a portion of the resource allocation process can be performed based on various proposals of the present disclosure.

[0210] Fig.18 A wireless device according to an embodiment of the present disclosure is shown.

[0211] Reference Fig.18 , the first wireless device (100) and the second wireless device (200) may transmit radio signals via various RATs (e.g., LTE and NR). Herein, {the first wireless device (100) and the second wireless device (200)} may correspond to Fig.17 {wireless device (100x) and BS (200)} and / or {wireless device (100x) and wireless device (100x)}.

[0212] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may additionally further include one or more transceivers 106 and / or one or more antennas 108. The (one or more) processors 102 may control the (one or more) memories 104 and / or the (one or more) transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods and / or operation flows disclosed in this document. For example, the (one or more) processors 102 may process the information in the (one or more) memories 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the (one or more) transceivers 106. The (one or more) processors 102 may receive a radio signal including a second information / signal through the transceiver 106, and then store the information obtained by processing the second information / signals in the (one or more) memories 104. The (one or more) memories 104 may be connected to the (one or more) processors 102, and may store various information related to the operation of the (one or more) processors 102. For example, (one or more) memories 104 may store software code including commands for executing part or all of the processing controlled by (one or more) processors 102 or for executing the descriptions, functions, processes, proposals, methods and / or operational flows disclosed in this document. Here, (one or more) processors 102 and (one or more) memories 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). (One or more) transceivers 106 may be connected to (one or more) processors 102 and send and / or receive radio signals through (one or more) antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. (One or more) transceivers 106 may be used interchangeably with (one or more) radio frequency (RF) units. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0213] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may additionally further include one or more transceivers 206 and / or one or more antennas 208. The (one or more) processors 202 may control the (one or more) memories 204 and / or the (one or more) transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods and / or operation flows disclosed in this document. For example, the (one or more) processors 202 may process the information in the (one or more) memories 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the (one or more) transceivers 206. The (one or more) processors 202 may receive a radio signal including fourth information / signals through the (one or more) transceivers 106, and then store the information obtained by processing the fourth information / signals in the (one or more) memories 204. The (one or more) memories 204 may be connected to the (one or more) processors 202, and may store various information related to the operation of the (one or more) processors 202. For example, (one or more) memories 204 may store software code including commands for executing part or all of the processing controlled by (one or more) processors 202 or for executing the descriptions, functions, processes, proposals, methods and / or operational flows disclosed in this document. Here, (one or more) processors 202 and (one or more) memories 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). (One or more) transceivers 206 may be connected to (one or more) processors 202 and transmit and / or receive radio signals through (one or more) antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. (One or more) transceivers 206 may be used interchangeably with (one or more) RF units. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0214] Below, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by, but are not limited to, one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operating procedures disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operating procedures disclosed in this document. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the description, function, process, proposal, method, and / or operation flow disclosed in this document, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206, and obtain the PDU, SDU, message, control information, data, or information according to the description, function, process, proposal, method, and / or operation flow disclosed in this document.

[0215] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204, thereby being driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods and / or operational flows disclosed in this document may be implemented using software or firmware in the form of codes, commands and / or command sets.

[0216] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and may store various types of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories 104 and 204 may be composed of read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drive, register, cash memory, computer-readable storage medium, and / or a combination thereof. One or more memories 104 and 204 may be located inside and / or outside one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0217] One or more transceivers 106 and 206 may send user data, control information, and / or radio signals / channels mentioned in the method and / or operation flow of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels mentioned in the description, function, process, proposal, method, and / or operation flow disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202, and may send and receive radio signals. For example, one or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may send user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to send and receive user data, control information and / or radio signals / channels mentioned in the description, functions, processes, proposals, methods and / or operation flows disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals to process received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0218] Fig.19 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0219] Reference Fig.19 The signal processing circuit (1000) may include a scrambler (1010), a modulator (1020), a layer mapper (1030), a precoder (1040), a resource mapper (1050), and a signal generator (1060). Fig.19 Operation / function, not limited to Fig.18 The processor (102, 202) and / or the transceiver (106, 206) may be Fig.18 The processor (102, 202) and / or the transceiver (106, 206) are implemented Fig.19 For example, you can Fig.18 The processor (102, 202) implements blocks 1010 to 1060. Alternatively, Fig.18 The processor (102, 202) implements blocks 1010 to 1050 and can be implemented by Fig.18 The transceiver (106, 206) is used to implement box 1060.

[0220] Can be through Fig.19 The signal processing circuit (1000) converts the codeword into a radio signal. Herein, the codeword is a coded bit sequence of an information block. The information block may include a transport block (e.g., UL-SCH transport block, DL-SCH transport block). The radio signal may be transmitted through various physical channels (e.g., PUSCH and PDSCH).

[0221] Specifically, the codeword can be converted into a scrambled bit sequence by the scrambler 1010. The scrambling sequence for scrambling can be generated based on an initial value, and the initial value can include the ID information of the wireless device. The scrambled bit sequence can be modulated into a modulation symbol sequence by the modulator 1020. The modulation scheme may include pi / 2-binary phase shift keying (pi / 2-BPSK), m-phase shift keying (m-PSK) and m-quadrature amplitude modulation (m-QAM). The complex modulation symbol sequence can be mapped to one or more transmission layers by the layer mapper 1030. The modulation symbol of each transmission layer can be mapped (precoded) to (one or more) corresponding antenna ports by the precoder 1040. The output z of the precoder 1040 can be obtained by multiplying the output y of the layer mapper 1030 with the N*M precoding matrix W. Here, N is the number of antenna ports and M is the number of transmission layers. The precoder 1040 can perform precoding after performing transform precoding (e.g., DFT) for the complex modulation symbol. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.

[0222] The resource mapper 1050 may map the modulation symbols of each antenna port to time-frequency resources. The time-frequency resources may include multiple symbols in the time domain (e.g., CP-OFDMA symbols and DFT-s-OFDMA symbols) and multiple subcarriers in the frequency domain. The signal generator 1060 may generate a radio signal from the mapped modulation symbols, and the generated radio signal may be sent to other devices through each antenna. To this end, the signal generator 1060 may include an inverse fast Fourier transform (IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analog converter (DAC), and an up-converter.

[0223] Can be used with Fig.19 The signal processing process for the signal received in the wireless device is configured in a manner opposite to the signal processing process (1010-1060) of the wireless device. Fig.18 100, 200) can receive a radio signal from the outside through an antenna port / transceiver. The received radio signal can be converted into a baseband signal by a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module. Next, the baseband signal can be restored to a codeword through a resource demapping process, a post-coding process, a demodulation processor, and a descrambling process. The codeword can be restored to the original information block by decoding. Therefore, a signal processing circuit (not illustrated) for receiving a signal may include a signal restorer, a resource demapper, a post-encoder, a demodulator, a descrambler, and a decoder.

[0224] Fig. 20 Another example of a wireless device according to an embodiment of the present disclosure is shown. The wireless device can be implemented in various forms according to use cases / services (see Fig.17 ).

[0225] Reference Fig. 20 , the wireless device (100, 200) may correspond to Fig.18 The wireless devices (100, 200) may be configured by various elements, components, units / portions and / or modules. For example, each of the wireless devices (100, 200) may include a communication unit (110), a control unit (120), a storage unit (130) and additional components (140). The communication unit may include a communication circuit (112) and (one or more) transceivers (114). For example, the communication circuit (112) may include Fig.18 One or more processors (102, 202) and / or one or more memories (104, 204) of the present invention. For example, the transceiver(s) (114) may include Fig.18The control unit (120) is electrically connected to the communication unit (110), the storage unit (130) and the additional components (140), and controls the overall operation of the wireless device. For example, the control unit (120) can control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the storage unit (130). The control unit (120) can send the information stored in the storage unit (130) to the outside (e.g., other communication devices) via the communication unit (110) through a wireless / wired interface, or store the information received from the outside (e.g., other communication devices) via the communication unit (110) through a wireless / wired interface in the storage unit (130).

[0226] The additional component (140) may be configured in various ways depending on the type of the wireless device. For example, the additional component (140) may include at least one of a power unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be implemented in the following forms without limitation: a robot ( Fig.17 100a), vehicles ( Fig.17 100b-1 and 100b-2), XR devices ( Fig.17 100c), handheld device ( Fig.17 100d), household appliances ( Fig.17 100e), IoT devices ( Fig.17 100f), digital broadcast terminal, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Fig.17 400), BS( Fig.17 200), network nodes, etc. Depending on the use case / service, the wireless device can be used in a mobile or fixed place.

[0227] exist Fig. 20In the wireless device (100, 200), all the various elements, components, units / parts and / or modules in the wireless device (100, 200) can be connected to each other through a wired interface, or at least part of them can be connected wirelessly through the communication unit (110). For example, in each of the wireless devices (100, 200), the control unit (120) and the communication unit (110) can be connected by wire, and the control unit (120) and the first unit (e.g., 130, 140) can be connected wirelessly through the communication unit (110). Each element, component, unit / part and / or module in the wireless device (100, 200) can also include one or more elements. For example, the control unit (120) can be constructed by a collection of one or more processors. As an example, the control unit (120) can be constructed by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. As another example, the storage unit (130) may be constructed by a random access memory (RAM), a dynamic RAM (DRAM), a read only memory (ROM), a flash memory, a volatile memory, a nonvolatile memory, and / or a combination thereof.

[0228] Hereinafter, the implementation will be described in detail with reference to the accompanying drawings. Fig. 20 .

[0229] Fig.21 A handheld device according to an embodiment of the present disclosure is shown. The handheld device may include a smart phone, a smart pad, a wearable device (e.g., a smart watch or smart glasses), or a portable computer (e.g., a notebook). The handheld device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT).

[0230] Reference Fig.21 The handheld device (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a storage unit (130), a power supply unit (140a), an interface unit (140b) and an I / O unit (140c). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 to 130 / 140a to 140c correspond to Fig. 20 Frame 110 to 130 / 140.

[0231] The communication unit 110 may send and receive signals (e.g., data signals and control signals) to and from other wireless devices or BSs. The control unit 120 may perform various operations by controlling the constituent elements of the handheld device 100. The control unit 120 may include an application processor (AP). The storage unit 130 may store data / parameters / programs / codes / commands required to drive the handheld device 100. The storage unit 130 may store input / output data / information. The power supply unit 140a may supply power to the handheld device 100 and include a wired / wireless charging circuit, a battery, etc. The interface unit 140b may support the connection of the handheld device 100 to other external devices. The interface unit 140b may include various ports (e.g., audio I / O ports and video I / O ports) for connecting to external devices. The I / O unit 140c may input or output video information / signals, audio information / signals, data and / or information input by a user. The I / O unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker and / or a tactile module.

[0232] For example, in the case of data communication, the I / O unit 140c can obtain information / signals (e.g., touch, text, voice, image, or video) input by the user, and the obtained information / signals can be stored in the storage unit 130. The communication unit 110 can convert the information / signals stored in the memory into radio signals, and directly send the converted radio signals to other wireless devices or to the BS. The communication unit 110 can receive radio signals from other wireless devices or BSs, and then restore the received radio signals to the original information / signals. The restored information / signals can be stored in the storage unit 130, and can be output as various types (e.g., text, voice, image, video, or tactile) through the I / O unit 140.

[0233] Fig. 22 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. The vehicle or autonomous vehicle may be implemented by a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0234] Reference Fig. 22 The vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a drive unit (140a), a power supply unit (140b), a sensor unit (140c) and an autonomous driving unit (140d). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 / 130 / 140a to 140d correspond to Fig. 20 Frame 110 / 130 / 140.

[0235] The communication unit 110 may send and receive signals (e.g., data signals and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. The control unit 120 may perform various operations by controlling elements of the vehicle or autonomous vehicle 100. The control unit 120 may include an electronic control unit (ECU). The drive unit 140a may cause the vehicle or autonomous vehicle 100 to travel on the road. The drive unit 140a may include an engine, a motor, a transmission system, wheels, brakes, a steering device, etc. The power supply unit 140b may supply power to the vehicle or autonomous vehicle 100, and may include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c may acquire vehicle status, external environment information, user information, etc. The sensor unit 140c may include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a position module, a vehicle forward / reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140d may implement a technology for maintaining a lane in which the vehicle is traveling, a technology for automatically adjusting a speed (e.g., adaptive cruise control), a technology for autonomously driving along a determined path, a technology for driving by automatically setting a path when a destination is set, and the like.

[0236] For example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving path and a driving plan from the acquired data. The control unit 120 may control the drive unit 140a so that the vehicle or the autonomous driving vehicle 100 may move along the autonomous driving path according to the driving plan (e.g., speed / direction control). In the middle of autonomous driving, the communication unit 110 may aperiodically / periodically acquire the most recent traffic information data from an external server and acquire surrounding traffic information data from adjacent vehicles. In the middle of autonomous driving, the sensor unit 140c may acquire vehicle status and / or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving path and driving plan based on the newly acquired data / information. The communication unit 110 may transmit information about the vehicle position, autonomous driving path, and / or driving plan to an external server. The external server may predict traffic information data using AI technology, etc. based on information collected from the vehicle or autonomous driving vehicle, and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0237] The claims in this specification may be combined in various ways. For example, the technical features in the method claims of this specification may be combined to be implemented or performed in a device, and the technical features in the device claims may be combined to be implemented or performed in a method. In addition, the technical features in (one or more) method claims and (one or more) device claims may be combined to be implemented or performed in a device. In addition, the technical features in (one or more) method claims and (one or more) device claims may be combined to be implemented or performed in a method.

Claims

1. A method for performing wireless communication by a first device, the method comprising the following steps: Obtaining information related to time division duplex (TDD) configuration; determining, based on the information related to the TDD configuration, candidate resources to which a bitmap associated with a sidelink resource pool is applied; sending a side link synchronization signal block S-SSB to the second device, Wherein, the S-SSB includes a sidelink primary synchronization signal S-PSS, a sidelink secondary synchronization signal S-SSS, and a physical sidelink broadcast channel PSBCH including a TDD time slot configuration; and sending a physical sidelink shared channel PSSCH to the second device based on information related to the TDD time slot configuration in the PSBCH, Wherein, the positions of the side link symbols for the candidate resources and the number of the side link symbols for the candidate resources are configured to be the same in the side link resource pool.

2. The method according to claim 1, wherein: The resources used to send the S-SSB are pre-configured by higher layers.

3. The method according to claim 1, wherein: The resources used to send the S-SSB include resources in the frequency domain and the time domain.

4. The method according to claim 1, wherein: Information related to the side link resource pool preconfigured by the higher layer is sent to the second device through the PSBCH.

5. The method according to claim 4, wherein: The information related to the pre-configured side link resource pool is in the form of a bitmap.

6. The method according to claim 1, wherein: Information about sidelink slots or sidelink symbols included in the sidelink resource pool among the information related to the TDD slot configuration is transmitted to the second device through the PSBCH.

7. The method according to claim 6, wherein: The information about the sidelink slots or the sidelink symbols included in the sidelink resource pool among the information related to the TDD slot configuration is in the form of a bitmap.

8. The method according to claim 7, wherein: The bitmap is configured based on any one of a subframe unit, a slot unit, or a symbol unit.

9. The method according to claim 1, wherein: The resources used to send the S-SSB are not included in the side link resource pool.

10. A first device for performing wireless communication, the first device comprising: one or more memories storing instructions; one or more transceivers; as well as one or more processors connected to the one or more memories and the one or more transceivers, wherein the one or more processors execute the instructions to: Get information related to time division duplex TDD configuration, determining, based on the information related to the TDD configuration, candidate resources to which a bitmap associated with a sidelink resource pool is applied; sending a side link synchronization signal block S-SSB to the second device, The S-SSB includes a side link primary synchronization signal S-PSS, a side link secondary synchronization signal S-SSS, and a physical side link broadcast channel PSBCH including a TDD time slot configuration. sending a physical sidelink shared channel PSSCH to the second device based on information related to the TDD time slot configuration in the PSBCH, Wherein, the positions of the side link symbols for the candidate resources and the number of the side link symbols for the candidate resources are configured to be the same in the side link resource pool.

11. A method for performing wireless communication by a second device, the method comprising the steps of: receiving a sidelink synchronization signal block S-SSB from the first device, The S-SSB includes a sidelink primary synchronization signal S-PSS, a sidelink secondary synchronization signal S-SSS, and a physical sidelink broadcast channel PSBCH including a time division duplex TDD time slot configuration; and receiving a physical sidelink shared channel PSSCH from the first device based on information related to the TDD time slot configuration in the PSBCH, Among them, information related to TDD configuration is obtained, wherein the candidate resources to which the bitmap associated with the side link resource pool is applied are configured based on the information associated with the TDD configuration, and Wherein, the positions of the side link symbols for the candidate resources and the number of the side link symbols for the candidate resources are configured to be the same in the side link resource pool.

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