Method and apparatus for setting resource pool in NR V2X

Abstract

A method for performing wireless communication by a first device and a device supporting the method are provided. The method may include the following steps: receiving a time division duplex uplink-downlink (TDD UL-DL) configuration including information related to UL resources from a base station; receiving information related to the start of a side link (SL) symbol, information related to the number of SL symbols, and a bitmap indicating one or more time slots included in an SL resource pool from the base station; and determining the SL resource pool.

Description

Technical Field

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

[0002] Side Link (SL) communication is a communication scheme in which a direct link is established between User Equipments (UEs) and the UEs exchange voice and data directly 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 infrastructure-equipped objects. V2X can be categorized into four types: V2V (Vehicle-to-Vehicle), V2I (Vehicle-to-Infrastructure), V2N (Vehicle-to-Network), and V2P (Vehicle-to-Pedestrian). V2X communication can be provided via the PC5 interface and / or the Uu interface.

[0004] In addition, as more and more communication devices require larger communication capacity, there is a need for enhanced mobile broadband communication compared to traditional radio access technologies (RATs). Therefore, the design of communication systems that take into account UEs or services that are sensitive to reliability and latency has also been discussed, and the next generation of radio access technologies that take into account enhanced mobile broadband communication, massive machine-to-machine communication (MTC), and ultra-reliable low-latency communication (URLLC) can be referred to as new RATs (radio access technologies) or NRs (new radios).

[0005] Figure 1 This diagram describes NR-based V2X communication compared to V2X communication based on RATs 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 RATs used prior to NR, the focus is on solutions that provide safety services based on V2X messages such as BSM (Basic Safety Message), CAM (Cooperation 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 CAM message type and / or an event-triggered DENM message type to another UE.

[0007] For example, a CAM can include dynamic vehicle status information such as direction and speed, static vehicle data such as size, and basic vehicle information such as exterior lighting status and route details. For example, a UE can broadcast a CAM, and the latency of the CAM can be less than 100ms. For example, a UE can generate a DENM and transmit it to another UE in unexpected situations such as vehicle breakdown or an accident. For example, all vehicles within the UE's transmission range can receive the CAM and / or DENM. In this case, the DENM can take precedence over the CAM.

[0008] Since then, various V2X scenarios have been proposed for NR regarding V2X communications, including vehicle platooning, advanced driving, extended sensors, and remote driving.

[0009] For example, based on vehicle platooning, vehicles can be dynamically formed into groups to move together. For example, to perform platooning operations based on vehicle formation, vehicles in the group can receive periodic data from the lead vehicle. For example, vehicles in the group can use the periodic data to reduce or increase the spacing between vehicles.

[0010] For example, based on advanced driving, vehicles can be semi-autonomous or fully autonomous. For example, each vehicle can adjust its 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 through local sensors can be exchanged between vehicles, logical entities, pedestrian UEs, and / or V2X application servers. This allows the vehicle to recognize a further improved environment compared to the environment detected using its own sensors, for example.

[0012] For example, remote driving can enable a person or remote vehicle in a dangerous environment to operate or control a remote vehicle, using a remote driver or V2X application. For example, if the route is predictable (e.g., public transportation), cloud-based driving can be used to operate or control the remote vehicle. Furthermore, remote driving can be achieved by accessing a cloud-based backend service platform.

[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 communication. Summary of the Invention

[0014] Technical Purpose

[0015] In addition, if only some of the symbols in a time slot are configured as UL, the UE needs to determine whether the corresponding time slot can be used as an SL time slot. In addition, the UE can determine the TDD UL DL mode indicated by the PSBCH based on the TDD UL DL mode of the Uu link. In this case, depending on the PSBCH payload size and the limitations of accessible SCS information, a method may be required for the UE to efficiently indicate / represent the TDD mode.

[0016] Technical Solution

[0017] In one embodiment, a method for performing wireless communication by a first device is provided. The method may include the following steps: receiving a time division duplex uplink-downlink (TDD UL-DL) configuration including information related to uplink (UL) resources from a base station; receiving information related to the start of a side link (SL) symbol, information related to the number of the SL symbols, and a bitmap representing one or more time slots included in a SL resource pool from the base station; and determining the SL resource pool. A plurality of second time slots may be determined by excluding one or more time slots in which at least one symbol among the SL symbols is not configured as a UL resource from a plurality of first time slots, and a plurality of third time slots may be determined by excluding one or more time slots in which a side link synchronization signal block (S-SSB) is configured from a plurality of second time slots, and a plurality of fourth time slots may be determined by excluding one or more reserved time slots from a plurality of third time slots, and a plurality of fifth time slots among a plurality of fourth time slots may be determined as the SL resource pool based on the bitmap.

[0018] In one embodiment, a first device configured to perform wireless communication is provided. 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. The one or more processors may execute the instructions to: receive a time division duplex uplink-downlink (TDD UL-DL) configuration including information related to uplink (UL) resources from a base station; receive information related to the start of a sublink (SL) symbol, information related to the number of SL symbols, and a bitmap representing one or more time slots included in an SL resource pool from the base station; and determine the SL resource pool. Multiple second time slots can be determined by excluding one or more time slots in which at least one SL symbol is not configured as an UL resource from multiple first time slots, multiple third time slots can be determined by excluding one or more time slots in which a sub-link synchronization signal block (S-SSB) is configured from multiple second time slots, multiple fourth time slots can be determined by excluding one or more reserved time slots from multiple third time slots, and multiple fifth time slots among multiple fourth time slots can be determined as an SL resource pool based on a bitmap.

[0019] Effects of the present disclosure

[0020] The user equipment (UE) can efficiently perform SL communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This diagram describes NR-based V2X communication compared to V2X communication based on RATs used before NR.

[0022] Figure 2 The structure of the NR system according to an embodiment of the present disclosure is shown.

[0023] Figure 3 The functional division between NG-RAN and 5GC according to an embodiment of the present disclosure is shown.

[0024] Figure 4 A radio protocol architecture according to an embodiment of the present disclosure is shown.

[0025] Figure 5 The structure of the NR system according to an embodiment of the present disclosure is shown.

[0026] Figure 6 The structure of the time slot of the NR frame according to an embodiment of the present disclosure is shown.

[0027] Figure 7An example of a BWP according to an embodiment of the present disclosure is shown.

[0028] Figure 8 A radio protocol architecture for SL communication according to an embodiment of the present disclosure is shown.

[0029] Figure 9 A UE performing V2X or SL communication according to an embodiment of the present disclosure is shown.

[0030] Figure 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.

[0031] Figure 11 Three playback types according to an embodiment of the present disclosure are shown.

[0032] Figure 12 FIG. 4 shows a synchronization source or synchronization reference for V2X according to an embodiment of the present disclosure.

[0033] Figure 13 DL resources and UL resources allocated based on TDD UL DL configuration according to an embodiment of the present disclosure are shown.

[0034] Figure 14 The process of determining a resource pool by a UE according to an embodiment of the present disclosure is shown.

[0035] Figure 15 The time slots excluded from the resource pool according to an embodiment of the present disclosure are shown.

[0036] Figure 16 Time slots that may be included in a resource pool according to an embodiment of the present disclosure are shown.

[0037] Figure 17 The process of determining a resource pool by a UE according to an embodiment of the present disclosure is shown.

[0038] Figure 18 A method for performing wireless communication by a first device according to an embodiment of the present disclosure is shown.

[0039] Figure 19 A method for a base station to perform wireless communication according to an embodiment of the present disclosure is shown.

[0040] Figure 20 A communication system 1 according to an embodiment of the present disclosure is shown.

[0041] Figure 21 A wireless device according to an embodiment of the present disclosure is shown.

[0042] Figure 22A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0043] Figure 23 A wireless device according to an embodiment of the present disclosure is shown.

[0044] Figure 24 A handheld device according to an embodiment of the present disclosure is shown.

[0045] Figure 25 An automobile or autonomous vehicle according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0046] In the present disclosure, "A or B" may mean "only A", "only B", or "both A and B". In other words, in the present disclosure, "A or B" may be interpreted as "A and / or B". For example, in the present disclosure, "A, B or C" may mean "only A", "only B", "only C", or "any combination of A, B, and C".

[0047] As used in this disclosure, a slash ( / ) or a comma 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".

[0048] In the present disclosure, “at least one of A and B” may mean “only A”, “only B”, or “both A and B”. In addition, in the present disclosure, 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”.

[0049] In addition, in the present disclosure, “at least one of A, B, and C” may mean “only A,” “only B,” “only C,” or “any combination of A, B, and C.” 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.”

[0050] In addition, the brackets used in the present disclosure may mean "for example". Specifically, when it is 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 the present disclosure is not limited to "PDCCH", and "PDDCH" may be proposed as an example of "control information". Specifically, when it is indicated as "control information (i.e., PDCCH)", this may also mean that "PDCCH" is proposed as an example of "control information".

[0051] The technical features described in each of the drawings in the present disclosure may be implemented separately or simultaneously.

[0052] 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 the Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS (E-UMTS) that uses E-UTRA. 3GPP LTE uses OFDMA in the downlink and SC-FDMA in the uplink. LTE-Advanced (LTE-A) is an evolution of LTE.

[0053] 5G NR is a successor technology to LTE-A, a new mobile communication system with high performance, low latency, and high availability. 5G NR can use all available spectrum resources, including low-frequency bands below 1 GHz, intermediate frequency bands from 1 GHz to 10 GHz, and high-frequency bands (millimeter waves) above 24 GHz.

[0054] For clarity of description, the following description will mainly focus on LTE-A or 5G NR. However, the technical features according to the embodiments of the present disclosure are not limited thereto.

[0055] 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.

[0056] 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 for 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 by 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 by other terms such as a base transceiver system (BTS), an access point (AP), etc.

[0057] Figure 2 The embodiment of the present invention illustrates a case where only gNBs are included. BSs 20 may be connected to each other via an Xn interface. BSs 20 may be connected to each other via a fifth-generation (5G) core network (5GC) and an NG interface. More specifically, BSs 20 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.

[0058] Figure 3 The functional division between NG-RAN and 5GC according to an embodiment of the present disclosure is shown.

[0059] Reference Figure 3 The 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 provisioning, dynamic resource allocation, etc. The AMF can provide functions such as non-access stratum (NAS) security and idle state mobility processing. The UPF can provide functions such as mobility anchoring and protocol data unit (PDU) processing. The session management function (SMF) can provide functions such as user equipment (UE) Internet Protocol (IP) address allocation and PDU session control.

[0060] The radio interface protocol layers between the UE and the network can be categorized as Layer 1 (L1), Layer 2 (L2), and Layer 3 (L3) based on the lower three layers of the Open Systems Interconnection (OSI) model, which is well known in communication systems. The physical (PHY) layer, belonging to Layer 1, provides information transmission services using physical channels, and the radio resource control (RRC) layer, located at Layer 3, controls radio resources between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the base station layer.

[0061] Figure 4 A radio protocol architecture according to an embodiment of the present disclosure is shown. Figure 4The 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.

[0062] Reference Figure 4 The physical layer provides information transfer services to upper layers via physical channels. The physical layer is connected to the media access control (MAC) layer, which is the upper layer of the physical layer, via transport channels. Data is transferred between the MAC layer and the physical layer via transport channels. Transport channels are categorized based on how data is transmitted over the radio interface and the characteristics of the data being transmitted.

[0063] Data is transmitted between different PHY layers (ie, the PHY layer of the transmitter and the PHY layer of the receiver) through a physical channel. The physical channel may be modulated using an Orthogonal Frequency Division Multiplexing (OFDM) scheme and uses time and frequency as radio resources.

[0064] The MAC layer provides services to the Radio Link Control (RLC) layer, a higher layer above the MAC layer, via logical channels. The MAC layer maps multiple logical channels to multiple transport channels. The MAC layer also provides logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides data transmission services via logical channels.

[0065] The RLC layer performs concatenation, segmentation, and reassembly of radio link control service data units (RLC SDUs). To ensure the different quality of service (QoS) required for radio bearers (RBs), the RLC layer provides three types of operation modes: transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM). AM RLC provides error correction through automatic repeat request (ARQ).

[0066] The Radio Resource Control (RRC) layer is defined only in the control plane. The RRC layer controls physical, transport, and logical channels related to the configuration, reconfiguration, and release of radio bearers. An RB is a logical path provided by Layer 1 (i.e., the PHY layer) and Layer 2 (i.e., the MAC layer, RLC layer, and PDCP layer) to transmit data between the UE and the network.

[0067] The functions of the Packet Data Convergence Protocol (PDCP) in the user plane include transmission of user data, header compression and encryption. The functions of the Packet Data Convergence Protocol (PDCP) in the control plane include transmission and encryption / integrity protection of control plane data.

[0068] 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.

[0069] RB configuration refers to the process of specifying radio protocol layers and channel attributes to provide a specific service and determining corresponding detailed parameters and operation methods. RBs can then be classified into two types: signaling radio bearers (SRBs) and data radio bearers (DRBs). SRBs are used as a path for transmitting RRC messages in the control plane, and DRBs are used as a path for transmitting user data in the user plane.

[0070] When an 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 may be in the RRC idle (RRC_IDLE) state. In the case of NR, an RRC inactive (RRC_INACTIVE) state is additionally defined, and the UE in the RRC_INACTIVE state may maintain its connection with the core network while releasing its connection with the BS.

[0071] The downlink transport channels for sending (or transmitting) data from the network to the UE include the broadcast channel (BCH) for sending system information and the downlink shared channel (SCH) for sending other user traffic or control messages. Traffic or control messages for 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 transport channels for sending (or transmitting) data from the UE to the network include the random access channel (RACH) for sending initial control messages and the uplink shared channel (SCH) for sending other user traffic or control messages.

[0072] 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.

[0073] A physical channel is configured from multiple OFDM symbols in the time domain and multiple subcarriers in the frequency domain. A subframe is configured from multiple OFDM symbols in the time domain. A resource block is configured from multiple subcarriers and multiple OFDM symbols in a resource allocation unit. In addition, each subframe can use specific subcarriers of specific OFDM symbols (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 for subframe transmission.

[0074] 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.

[0075] 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).

[0076] When using a normal CP, each time slot can include 14 symbols. When using an extended CP, each time slot can 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).

[0077] Table 1 below shows the number of time slots (N) per symbol according to the SCS setting (μ) when a 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 ).

[0078] [Table 1]

[0079] <![CDATA[SCS(15*2 μ )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,μ slot ]]> <![CDATA[N subframe,μ slot ]]> 15KHz (μ=0) 14 10 1 30KHz (μ=1) 14 20 2 60KHz (μ=2) 14 40 4 120KHz (μ=3) 14 80 8 240KHz (μ=4) 14 160 16

[0080] 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.

[0081] [Table 2]

[0082] <![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

[0083] In the NR system, OFDM(A) parameter sets (e.g., SCS, CP length, etc.) may be configured differently between multiple cells integrated into one UE. Therefore, the (absolute time) duration (or interval) of a time resource (e.g., subframe, time slot, or 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.

[0084] 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 frequency bands can be supported, and with an SCS of 30kHz / 60kHz, dense urban areas, 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.

[0085] The NR frequency band can 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).

[0086] [Table 3]

[0087] Frequency range specification Corresponding frequency range Subcarrier spacing (SCS) FR1 450MHz-6000MHz 15, 30, 60kHz FR2 24250MHz-52600MHz 60, 120, 240kHz

[0088] As described above, the value of the frequency range in the NR system can 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 bands. The unlicensed bands may be used for various purposes, for example, the unlicensed bands are used for vehicle-specific communications (e.g., autonomous driving).

[0089] [Table 4]

[0090] Frequency range specification Corresponding frequency range Subcarrier spacing (SCS) FR1 410MHz-7125MHz 15, 30, 60kHz FR2 24250MHz-52600MHz 60, 120, 240kHz

[0091] Figure 6 The structure of the time slot of the NR frame according to an embodiment of the present disclosure is shown.

[0092] Reference Figure 6 A slot includes multiple symbols in the time domain. For example, in the case of normal CP, one slot may include 14 symbols. For example, in the case of extended CP, one slot may include 12 symbols. Alternatively, in the case of normal CP, one slot may include 7 symbols. However, in the case of extended CP, one slot may include 6 symbols.

[0093] 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 activated BWPs. 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.

[0094] In addition, the radio interface between a UE and another UE or 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.

[0095] Hereinafter, the bandwidth part (BWP) and the carrier will be described in detail.

[0096] 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.

[0097] When bandwidth adaptation (BA) is used, the reception bandwidth and transmission bandwidth of the user equipment (UE) do not need 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 reducing / expanding the bandwidth, changing the position of the bandwidth, or changing the subcarrier spacing of the bandwidth.

[0098] For example, the bandwidth can be reduced during periods of low activity to save power. For example, the bandwidth can be relocated (or moved) from the frequency domain. For example, 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 currently active BWP among the BWPs.

[0099] For example, the BWP may be at least one of an active BWP, an initial BWP, and / or a default BWP. For example, the UE may not monitor the downlink radio link quality in DL BWPs other than the active DL BWP on the primary cell (PCell). For example, the UE may not receive the PDCCH, physical downlink shared channel (PDSCH), or channel state information-reference signal (CSI-RS) (except for RRM) outside the active DL BWP. For example, the UE may not trigger channel state information (CSI) reporting for inactive DL BWPs. For example, the UE may not transmit the physical uplink control channel (PUCCH) or physical uplink shared channel (PUSCH) outside the active UL BWP. For example, in the downlink, the initial BWP may be given as a set of contiguous RBs for the remaining minimum system information (RMSI) control resource set (CORESET) (configured by the physical broadcast channel (PBCH)). For example, in the uplink, the initial BWP may be given by the system information block (SIB) used for the random access procedure. For example, the default BWP may be configured by higher layers. For example, the initial value of the default BWP may be the initial DL BWP.To save energy, if the UE cannot detect downlink control information (DCI) during a designated period, the UE may switch the UE's active BWP to the default BWP.

[0100] 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 SL signal within a specific BWP, and a receiving UE can receive a SL channel or 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 configured (in advance) 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.

[0101] 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 embodiment of the present invention, the number of BWPs is 3.

[0102] Reference Figure 7 , Common Resource Blocks (CRBs) may be carrier resource blocks numbered from one end of the carrier frequency band to the other. Additionally, PRBs may be resource blocks numbered within each BWP. Point A may indicate a common reference point for the resource block grid.

[0103] 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 a carrier, and subcarrier 0 of all parameter sets (e.g., all parameter sets supported by the network on the corresponding carrier) is aligned in point A. For example, the offset can be the PRB distance between the lowest subcarrier in a given parameter set and point A. For example, the bandwidth can be the number of PRBs in a given parameter set.

[0104] Hereinafter, V2X or SL communication will be described.

[0105] 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 the user plane protocol stack, and Figure 8 (b) in FIG. 5 shows the control plane protocol stack.

[0106] Next, the sub-link synchronization signal (SLSS) and the synchronization information will be described in detail.

[0107] The SLSS may include a primary sublink synchronization signal (PSSS) and a secondary sublink synchronization signal (SSSS) as SL specific sequences. The PSSS may be referred to as a secondary link primary synchronization signal (S-PSS), and the SSSS may be referred to as a secondary 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 the synchronization signal ID.

[0108] The physical sidelink broadcast channel (PSBCH) can be a (broadcast) channel for transmitting default (system) information, which must be known to the UE 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 a 24-bit cyclic redundancy check (CRC).

[0109] S-PSS, S-SSS and PSBCH can be included in a block format that supports periodic transmission (e.g., SL synchronization signal (SS) / PSBCH block, hereinafter, sublink synchronization signal block (S-SSB)). The S-SSB can have the same parameter set (i.e., SCS and CP length) as the physical sublink control channel (PSCCH) / physical sublink shared channel (PSSCH) in the carrier, and the transmission bandwidth can exist within the (pre-) configured sublink (SL) BWP. For example, the S-SSB can have a bandwidth of 11 resource blocks (SBs). For example, the PSBCH can exist across 11 RBs. In addition, the frequency position of the S-SSB can be (pre-) configured. Therefore, the UE does not have to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0110] Figure 9 A UE performing V2X or SL communication according to an embodiment of the present disclosure is shown. Figure 9 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0111] Reference Figure 9 In V2X or SL communication, the term "UE" generally refers to a user's UE. However, if a network device such as a base station (BS) transmits and receives signals according to a communication scheme between UEs, the BS may also be considered a type of UE. For example, UE 1 may be first wireless device 100, and UE 2 may be second wireless device 200.

[0112] For example, UE 1 can select a resource unit corresponding to a specific resource from a resource pool representing a set of resources. Furthermore, UE 1 can transmit an SL signal using the resource unit. For example, a resource pool in which UE 1 can transmit a signal can be configured for UE 2, which is a receiving UE, and UE 1's signal can be detected in the resource pool.

[0113] Here, if UE 1 is within the connection range of the BS, the BS may inform UE 1 of the resource pool. 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 pre-configured resource pool.

[0114] 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.

[0115] Hereinafter, resource allocation in SL will be described.

[0116] Figure 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. Figure 10 The embodiments of the present disclosure may be combined with the various embodiments of the present disclosure. In the 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 the LTE transmission mode. In NR, the transmission mode may be referred to as the NR resource allocation mode.

[0117] For example, Figure 10 (a) in FIG. 1 shows UE operations related to LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, Figure 10 (a) in FIG. 4 shows UE operations related to NR resource allocation mode 1. For example, LTE transmission mode 1 can be applied to conventional SL communication, and LTE transmission mode 3 can be applied to V2X communication.

[0118] For example, Figure 10 (b) in FIG. 4 shows UE operations related to LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, Figure 10 (b) in FIG. 4 shows UE operations related to NR resource allocation mode 2.

[0119] Reference Figure 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 via the PDCCH (more specifically, downlink control information (DCI)), and UE 1 may perform V2X or SL communication with UE 2 according to the resource scheduling. For example, UE 1 may transmit sidelink control information (SCI) to UE 2 via the physical sidelink control channel (PSCCH), and thereafter transmit data based on the SCI to UE 2 via the physical sidelink shared channel (PSSCH).

[0120] Reference Figure 10(b) 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, which has autonomously selected resources in the resource pool, can send SCI to UE 2 via PSCCH, and thereafter send data based on the SCI to UE 2 via PSSCH.

[0121] Figure 11 Three playback types according to an embodiment of the present disclosure are shown. Figure 11 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 11 (a) shows a broadcast type SL communication, Figure 11 (b) in FIG. 4 shows unicast type SL communication, and Figure 11 (c) in FIG. 5 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.

[0122] Figure 12 FIG. 4 shows a synchronization source or synchronization reference for V2X according to an embodiment of the present disclosure. Figure 12 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0123] refer to Figure 12 In V2X, the UE can synchronize directly with the Global Navigation Satellite System (GNSS), or it can synchronize indirectly with the GNSS through a UE that synchronizes directly with the GNSS (within or outside the network coverage). If the GNSS is configured as the synchronization source, the UE can calculate the Direct Frame Number (DFN) and subframe number by using the Coordinated Universal Time (UTC) and a (pre-)configured DFN offset.

[0124] Alternatively, the UE may synchronize directly with the BS, or may synchronize with another UE that is time / frequency synchronized with the BS. For example, the BS may be an eNB or gNB. For example, when the UE is within network coverage, the UE may receive synchronization information provided by the BS and may synchronize directly with the BS. Thereafter, the UE may provide synchronization information to another neighboring UE. If BS timing is configured based on synchronization, for synchronization and downlink measurements, the UE may rely on the cell associated with the corresponding frequency (when it is within cell coverage at that frequency) or the primary cell or serving cell (when it is outside cell coverage at that frequency).

[0125] A BS (e.g., a serving cell) may provide a synchronization configuration for a carrier used for V2X or SL communication. In this case, the UE may conform to the synchronization configuration received from the BS. If the UE cannot detect any cells in the carrier used for V2X or SL communication and cannot receive a synchronization configuration from the serving cell, the UE may conform to the pre-configured synchronization configuration.

[0126] Alternatively, the UE may synchronize with another UE that cannot obtain synchronization information directly or indirectly from the BS or GNSS. The synchronization source or preference may be pre-configured for the UE. Alternatively, the synchronization source and preference may be configured via a control message provided by the BS.

[0127] The SL synchronization source may be associated / correlated with the synchronization priority. For example, the relationship between the synchronization source and the synchronization priority may be defined as shown in Table 5 or Table 6. Table 5 or Table 6 is for exemplary purposes only, and the relationship between the synchronization source and the synchronization priority may be defined in various forms.

[0128] [Table 5]

[0129]

[0130]

[0131] [Table 6]

[0132] Priority Level GNSS-based synchronization eNB / gNB-based synchronization P0 GNSS BS P1 All UEs synchronized directly with GNSS All UEs synchronized directly with the BS P2 All UEs indirectly synchronized with GNSS All UEs that are indirectly synchronized with the BS P3 BS GNSS P4 All UEs synchronized directly with the BS All UEs synchronized directly with GNSS P5 All UEs that are indirectly synchronized with the BS All UEs indirectly synchronized with GNSS P6 Other UEs with low priority Other UEs with low priority

[0133] In Table 5 or Table 6, P0 may represent the highest priority and P6 may represent the lowest priority. In Table 5 or Table 6, the BS may include at least one of a gNB and an eNB.

[0134] It may be (pre-)configured whether GNSS based synchronization or BS based synchronization is used.In single carrier operation, the UE may derive its transmit timing from the highest priority available synchronization reference.

[0135] In addition, in various embodiments of the present disclosure, for example, "configured / configured" or "defined / defined" may include a base station or a network sending information related to "configuration" or information related to "definition" to a UE through predefined signaling (for example, SIB, MAC, RRC, etc.). For example, "configured / configured" or "defined / defined" may include a base station or a network configuring or pre-configuring information related to "configuration" or information related to "definition" for a UE.

[0136] In addition, the UE may be (pre-)configured with a resource pool for SL transmission and reception. For example, the network may configure or pre-configure a resource pool related to SL communication with the UE. For example, the network may be a base station, a V2X server, etc. In addition, the UE may perform SL transmission / reception by using resources in the resource pool.

[0137] In addition, in a licensed carrier, i.e., a carrier where a Uu link (e.g., uplink and / or downlink) and SL coexist, a SL resource pool may be additionally determined or configured based on the TDD UL / DL configuration. This can reduce or avoid interference between the DL and SL.

[0138] In addition, according to the TDD UL DL configuration, multiple patterns or a single pattern including DL resources and / or UL resources may be repeated at a specific period. For example, the base station may send the TDD UL DL configuration to the UE through RRC signaling. Tables 7 and 8 show examples of TDD UL DL configuration (TDD-UL-DL-ConfigCommon). For details related to the TDD UL DL configuration, refer to 3GPP TS 38.331 V15.8.0 and 3GPP TS 38.213 V15.8.0.

[0139] [Table 7]

[0140]

[0141] [Table 8]

[0142]

[0143]

[0144] Referring to Table 7 and Table 8, the information related to each pattern (TDD-UL-DL-Pattern) may include information related to the number of DL slots, the number of DL symbols, the number of UL slots and / or the number of UL symbols. For example, the base station may allocate as many DL resources as the number of DL slots configured by RRC signaling from the start time of each pattern, and then may allocate as many DL resources as the number of DL symbols configured by RRC signaling from the first symbol in the next slot of the last DL slot in the pattern. For example, the base station may allocate as many UL resources as the number of UL slots configured by RRC signaling from the end time of each pattern, and then may allocate as many UL resources as the number of UL symbols configured by RRC signaling from the last symbol in the previous slot of the first UL slot in the pattern. A single pattern or multiple patterns may be repeatedly applied in units of periods (or the sum of multiple periods). For example, a UE that receives a TDD UL DL configuration from a base station may know that Figure 13 DL resources and / or UL resources are allocated as shown in .

[0145] Figure 13 DL resources and UL resources allocated based on TDD UL DL configuration according to an embodiment of the present disclosure are shown. Figure 13 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0146] In addition, the UE may send a PSBCH to another UE, and the PSBCH may include all or part of the TDD UL DL configuration information. Alternatively, the PSBCH may include information about time slots in which the UE can use for (temporary) SL communication. In an embodiment of the present disclosure, the information about the time slots indicated by the PSBCH that can be used for SL communication may be referred to as reference SL resource information. For example, the reference SL resource information may be expressed as the number of time slots that can be used for SL communication within a period indicated by the PSBCH. For example, based on the reference SL resource information, as many SL available resources as the number of time slots configured / indicated from the end time of the period may be allocated. This pattern may be repeatedly applied in units of periods. When analyzing the pattern, the number of time slots and / or the number of symbols may be set to be the same as the SCS information for the SL BWP, or may be interpreted based on the corresponding values.

[0147] Furthermore, when using resources for SL transmission / reception in a timeslot, the starting symbol and / or number of symbols can be configured or pre-configured for the UE for each SL BWP. For example, the symbol period that can be used for SL can be configured for the UE. For example, the UE can borrow some UL resources and use them as SL resources. In the above case, if only some of the symbols in a timeslot are configured as UL, the UE needs to determine whether the corresponding timeslot can be used as an SL timeslot.

[0148] In addition, the length of the symbol period of the SL SSB (hereinafter, S-SSB) may be different from the length of the symbol period of other SL channels (e.g., PSCCH / PSSCH and / or PSFCH). For example, one or more UEs may not be allowed to transmit the S-SSB in the same time slot using TDM and / or FDM. That is, the S-SSB may be mapped to different time slots.

[0149] In addition, multiple resource pools can be configured for a UE in the SL BWP. In addition, for example, the UE can transmit PSCCH and / or PSSCH by using resources in different resource pools. In addition, the UE can be (pre-)configured with a (RX) resource pool that includes all multiple (TX) resource pools, and the UE can receive PSCCH and / or PSSCH transmitted by other UEs in the resource pool.

[0150] In addition, the UE can determine the TDD mode indicated by the PSBCH based on the TDD mode of the Uu link. In this case, depending on the PSBCH payload size and the limitations of accessible SCS information, a method may be needed for the UE to efficiently indicate / represent the TDD mode.

[0151] Hereinafter, based on various embodiments of the present disclosure, a method for configuring a resource pool for SL transmission and reception and a device supporting the method are proposed. For example, the network may configure or pre-configure a resource pool for SL transmission / reception for a UE. For example, the network may send information related to the resource pool for SL transmission / reception to the UE. For example, the network may be a base station or a V2X server. Hereinafter, "configuration" may include "configuration from the network" or "pre-configuration from the network."

[0152] For example, the SL resources in the SL resource pool may be configured as all of the cell-specific UL resources for the UE. Alternatively, for example, the SL resources in the SL resource pool may be configured as part of the cell-specific UL resources for the UE. For this purpose, if the network configures a resource pool for the UE, the network may configure the resource pool for the UE only for the UL resources indicated by the (cell-specific) TDD UL DL configuration. However, considering the SL communication between the UE in coverage and the UE out of coverage, a method may be required for the network to configure the resource pool for the UE without taking into account the TDD UL DL configuration. Alternatively, considering the SL communication between the UE in coverage and the UE out of coverage, a method may be required for the UE out of coverage to obtain information related to the TDD UL DL configuration or information equivalent / similar to the information related to the TDD UL DL configuration.

[0153] For example, a UE within coverage can send a PSBCH including information related to the TDD UL DL configuration to a UE outside coverage. In addition, considering the signaling overhead of the PSBCH, the information related to the TDD UL DL configuration included in the PSBCH can be simplified compared to the information related to the TDD UL DL configuration received by the UE within coverage from the network. For example, reference SL resource information can be sent via the PSBCH. However, the reference SL resource information cannot accurately represent the location of the cell-specific UL resources that can be represented in the TDD UL DL configuration.

[0154] In addition, the SL resource pool information used for SL communication may be different between a UE that configures a resource pool based on a TDD UL DL configuration and a UE that configures a resource pool based on the reference SL resource information included in the PSBCH. Therefore, SL transmission and reception between each UE may be inefficient or impossible. In order to avoid the above problems, the network may configure reference SL resource information for UEs within the coverage area. For example, the network may configure reference SL resource information for UEs within the coverage area through RRC signaling. For example, the reference SL resource information may be configured in the same manner as the content in the PSBCH. For example, the reference SL resource information indicated by the RRC configuration may include information related to the period and / or information related to the number of time slots that can be used for SL communication within the period. The UE may determine that as many resources as the number of time slots that can be used for SL communication from the end time within the configured period are resources that can be used for SL. Alternatively, the information related to the period may be information related to a combination of periods of multiple patterns. For example, the multiple patterns may be two patterns. In this case, the UE may determine as many resources as the number of time slots that can be used for SL communication from the end time of the second mode as resources available for SL. Alternatively, the UE may determine as many resources as the number of time slots that can be used for SL communication from the end time of the first mode and all resources in the second mode as resources available for SL. Alternatively, the UE may determine as many resources as the number of time slots that can be used for SL communication from the end time of the first mode and as many resources as the number of time slots that can be used for SL communication from the end time of the second mode as resources available for SL. In the case where the UE interprets the mode, the number of time slots and / or the number of symbols is set to be the same as the SCS information for the SL BWP, or the UE may interpret the mode based on the corresponding values. In the above case, if the resources are configured in the form of using some resources for the SL available time slots configured / indicated by the reference SL resource information when configuring the resource pool, the understanding of the resource pool may be the same between the UE in coverage and the UE out of coverage. Alternatively, the reference SL resource information indicated by the PSBCH and / or RRC signaling may be represented as information about the SL time slot or SL resource in the mode and / or another mode or bitmap in which the mode is applied. For example, the UE may not always apply the mode periodically. Alternatively, the UE or the network may indicate / represent the time when the mode is actually applied by using a bitmap within a specific period, and the bitmap may be repeated at a (pre-)configured period.

[0155] In addition, the UE can send information about the UL time slot through the PSBCH. For example, the information about the UL time slot indicated by the content (hereinafter, PSBCH content) sent by the UE through the PSBCH may include at least one of information about the mode (e.g., the number of modes), information about the period (e.g., the sum of all periods or a combination of periods) and / or information about the number of UL time slots in each mode. For example, a single pattern may include two patterns, and the sum of the periods of the two patterns may be set to the period of the single pattern, and DL to UL switching may exist only once within a single pattern. For example, a single pattern with a period of 4ms may be represented as a combination of a first pattern with a period of 1ms and a second pattern with a period of 3ms. If a single pattern is represented by a combination of two patterns, the UE may skip the signaling for indicating / indicating information about the pattern, and the UE may use the signaling for indicating / indicating information about the pattern to indicate / indicate UL time slot information (e.g., information about the number of UL time slots).

[0156] For example, the UE may transmit information related to a combination of cycles via the PSBCH. For example, the information related to the combination of cycles may consist of 4 bits. For example, the UE may indicate / represent the combination of cycles by using 4 bits on the PSBCH. For example, the combination of cycles may be as shown in Table 9. Table 9 is merely an example, and the combination of cycles may be defined in various forms.

[0157] [Table 9]

[0158]

[0159] Additionally, for example, the UE may jointly indicate / express the number of each of the UL slots in each of the two indicated / expressed patterns by using additional bits (eg, 9 bits, 8 bits, or 7 bits) on the PSBCH.

[0160] In addition, if the UE sends information about UL time slots through the PSBCH, the UE can indicate / represent the PSBCH content by distinguishing the case where the number of patterns is 1 from the case where the number of patterns is 2. In this case, if the number of patterns is 2, the UE can exclude information about the number of UL time slots of the type in which DL to UL switching only occurs once from the indicative value. For example, the UE can send information about UL time slots through the PSBCH only when the ratio of the number of UL time slots to the total number of time slots in the two patterns is less than or equal to a specific threshold. For example, the UE can determine that information about UL time slots can be indicated through the PSBCH content only when the ratio of the number of UL time slots to the total number of time slots in the two patterns is less than or equal to a specific threshold. For example, the specific threshold may be 0.6 or 0.5, etc. For example, the UE can receive information related to the specific threshold from the network or base station. For example, information related to the specific threshold can be configured or pre-configured for the UE. For example, information related to the specific threshold can be predefined for the UE. Accordingly, the PSBCH signaling overhead can be reduced.

[0161] For example, based on the UEs in coverage, the reference SL resources may include all or part of the UL time slots indicated in the (cell-specific) TDD UL DL configuration. More specifically, if the TDD UL DL configuration is configured with multiple modes, the reference SL resources may include the UL time slots of the last mode. For example, if the TDD UL DL configuration is configured with multiple modes and the last mode is all configured with UL time slots, the reference SL resources may include the UL time slots of the previous mode of the last mode. Additionally / alternatively, if all symbols between the beginning and the end of the SL symbol configured for the UE in the time slot correspond to UL resources in the TDD UL DL configuration, then the corresponding time slot may be included in the reference SL resources even if only some symbols in the time slot are UL resources.

[0162] In addition, information about the UL time slot that can be sent / indicated by the PSBCH can be configured for the UE based on a specific reference SCS. More specifically, considering the signaling overhead of the PSBCH, the reference SCS can be different based on information about the mode (e.g., the number of modes) and / or information about the period (e.g., the sum of all periods or a combination of periods). For example, basically, information about the UL time slot indicated by the PSBCH content can be sent based on the SCS information for the PSBCH or the reference SCS information used in the TDD UL DL configuration. For example, the reference SCS information can be pre-configured for the UE by the base station or the network. For example, the maximum value of the SCS information applicable to the UE (e.g., the u value in Table 1 or Table 2) can be limited based on information about the mode and / or information about the period. For example, if two patterns are used and the sum of the total periods is 4 (ms) or 5 (ms), then for the UE, the maximum value of the SCS applicable to the UE can be configured to be 2 (i.e., 60kHz). For example, if two patterns are used and the total period sum is 10 (ms), then for the UE, the maximum value of the SCS applicable to the UE can be configured to 1 (i.e., 30 kHz). For example, if two patterns are used and the total period sum is 20 (ms), then for the UE, the maximum value of the SCS applicable to the UE can be configured to 0 (i.e., 15 kHz).

[0163] For example, reference SCS information related to information about the UL time slot sent by the UE via the PSBCH may be configured or pre-configured / defined for the UE. For example, the reference SCS information may be information related to the SCS used in the PSBCH content. For example, reference SCS information (i.e., u value) may be configured or defined for the UE based on a combination of a pattern and / or period indicated by the PSBCH content (as appropriate). For example, for a combination of a specific pattern and / or a specific period, the UE may expect or determine that the SCS is not configured to exceed a maximum value. In this case, if the reference SCS information used in the TDD UL DL configuration is greater than the reference SCS information used in the PSBCH content (in the case of a high SCS value), the UE may not be able to fully indicate the TDD UL DL configuration by using the PSBCH content. Therefore, for example, if multiple time slots overlapping with the time slots based on the SCS related to the PSBCH content in the TDD UL DL configuration are all available for SL communication (for example, if all symbols corresponding to the number of SL symbols and the starting SL symbol index configured in the SL BWP are cell-specific UL), the UE can set / indicate the corresponding time slots as UL time slots when setting the PSBCH content. On the other hand, when setting the PSBCH content, the UE may not set / indicate other time slots as UL time slots.

[0164] In the above situation, the UE within the coverage area can consider the PSBCH content configuration and the reference SCS information in the process of extracting the reference SL resources configured for the resource pool from the TDD UL DL configuration. For example, if all time slots of the TDD ULDL configuration in the corresponding time slot are available for SL communication in units of time slots based on the SCS related to the PSBCH content (for example, if all symbols corresponding to the number of SL symbols and the starting SL symbol index configured in the SL BWP are cell-specific UL), the UE can include all time slots that overlap with the time slots based on the SCS related to the corresponding PSBCH content in the reference SL resources. On the other hand, the UE may not include other time slots in the reference SL resources.

[0165] Alternatively, the reference SL resources may include DL resources and / or flexible (F) resources in the TDD UL DL configuration value. In this case, when the resource pool is subsequently configured, the DL resources and / or F resources may be ultimately excluded.

[0166] For example, the process of selecting a resource pool by the UE may include the process of the UE selecting all or part of the time slots in the reference SL resources. For example, for all or part of the reference SL resources, the UE or the network may indicate the time slots to be included in the resource pool by using a bitmap. For example, the size of the bitmap may be (pre-)configured, and the corresponding bitmap may be periodically reapplied.

[0167] For example, the set of time slots in the reference SL resource can be extended to the time slots in the radio frame. Alternatively, for example, the set of time slots in the reference SL resource can be extended to 10240 time slots. Alternatively, for example, the set of time slots in the reference SL resource can be extended to the time slots in the period used for S-SSB. Alternatively, for example, the set of time slots in the reference SL resource can be extended to the time slots in the period used for S-SSB bundles. Alternatively, for example, the set of time slots in the reference SL resource can be extended to the time slots in the S-SSB time slots adjacent to each other. Alternatively, for example, the set of time slots in the reference SL resource can be extended to the time slots in the period for the (pre)configured resource pool. For example, the resource pool can be configured or preconfigured for the UE. That is, the pattern can be repeated according to the periodicity information, and based on this, the pattern can be converted into information in the radio frame. Alternatively, the set of time slots in the reference SL resource can be extended to the time slots corresponding to 20 milliseconds. Alternatively, the set of time slots in the reference SL resource can be extended to the time slots in the total period derived from tdd-UL-DL-ConfigurationCommon. For example, if two modes are indicated / notified by tdd-UL-DL-ConfigurationCommon and each mode has P and P1 as periods, the total period can be P+P1. The set of time slots in the reference SL resource can be extended to the time slots in P+P1.

[0168] For example, the UE may exclude the time slots configured for S-SSB from the time slots in the reference SL resources in the radio frame. For example, the UE may infer or determine the time slots configured for S-SSB based on the period information and the time slot offset information for S-SSB. Thereafter, the UE may configure the time slots in the SL resource pool by repeatedly applying the bitmap to the remaining time slots in the radio frame. If the bitmap is not fully applied at the end of the radio frame, for example, if the number of remaining time slots in the radio frame is not a multiple of the bitmap size, the UE may apply only the applicable portion from the front of the bitmap and ignore the rest.

[0169] For example, the UE may exclude time slots configured for S-SSB from the time slots in the extended reference SL resource. In addition, if the period of the reference SL resource is 20 milliseconds, or if the period of the reference SL resource is set to the total period derived from tdd-UL-DL-ConfigurationCommon, it may be inefficient for the UE to apply the same bitmap information between periods including S-SSB and periods not including S-SSB. Accordingly, the UE may use different (pre-) configured bitmap information depending on each period of the reference SL resource or whether S-SSB is included in each period. The bitmap information may include the size of the bitmap and / or the bitmap value. For example, if the UE sets the size of the bitmap used in a period including S-SSB to a value obtained by subtracting the number of S-SSB time slots from the size of the bitmap used in a period not including S-SSB, the amount of resources reserved in the corresponding period may be minimized.

[0170] For example, the UE may exclude the time slots configured for S-SSB from the time slots in the reference SL resources in the radio frame. For example, the UE may infer or determine the time slots configured for S-SSB based on the period information and time slot offset information for S-SSB. Thereafter, the UE may configure reserved time slots for the remaining time slots in the radio frame, and the UE may exclude the reserved time slots from the time slots in the reference SL resources in the radio frame. If the number of remaining time slots in the radio frame is not a multiple of the bitmap size, the bitmap cannot be fully applied. To avoid this, reserved time slots to which the bitmap is not applied may be configured. In this case, if the reserved time slots are crowded within a specific time period, delay problems may occur. Accordingly, the reserved time slots need to be distributed as evenly as possible in the remaining time slots in the reference SL resources other than the S-SSB time slots. Thereafter, for the remaining time slots in the radio frame other than the S-SSB time slots and reserved time slots in the reference SL resources, the UE may configure the time slots in the SL resource pool by repeatedly applying the bitmap. Table 10 or Table 11 shows an example of the above method.

[0171] [Table 10]

[0172]

[0173] [Table 11]

[0174]

[0175]

[0176] For example, the UE may configure reserved time slots in the time slots in the reference SL resources in the radio frame, and the UE may exclude the reserved time slots from the time slots in the reference SL resources in the radio frame. If the number of time slots in the reference SL resources in the radio frame is not a multiple of the bitmap size, the bitmap cannot be fully applied. To avoid this, reserved time slots for which the bitmap is not applied may be configured. In this case, if the reserved time slots are crowded within a specific time period, delay problems may occur. Accordingly, the reserved time slots need to be distributed as evenly as possible among the time slots in the reference SL resources. Thereafter, the UE may repeatedly apply the bitmap to the remaining time slots in the radio frame other than the reserved time slots in the reference SL resources. Thereafter, the UE may exclude the time slots configured for S-SSB from the time slots indicated by the bitmap in the time slots in the reference SL resources in the radio frame. For example, the UE may infer or determine the time slots configured for S-SSB based on the time slot offset information and period information for S-SSB. After the above processing, the UE may configure the remaining time slots configured by the bitmap as time slots in the SL resource pool.

[0177] For example, the UE may repeatedly apply the bitmap to the time slots in the reference SL resource in the radio frame. More specifically, the size of the bitmap may be configured to be the same as the period of the reference SL resource pattern, or may be configured to be a multiple of the period of the reference SL resource pattern. For example, a possible value of the bitmap size may be the number of time slots that can be indicated within a specific period (e.g., 20ms) of the TDD configuration or the reference SL resource pattern. For example, depending on the reference SCS value for the bitmap, a possible value of the bitmap size may be the number of UL time slots or reference SL time slots that can be indicated within 20 time slots, 40 time slots, 80 time slots, and / or 160 time slots, respectively. For example, in the case of SCS=120kHz, the possible values of the bitmap size may be 1, 2, ... 160. Since the number of UL time slots can be indicated in units of one time slot by the TDD configuration, the possible values of the bitmap size may also be in units of one time slot. In addition, if the size of the bitmap is small, the flexibility of the configuration may be reduced, so the minimum value of the bitmap size may be 2. Alternatively, for example, the minimum value of the bitmap size may be a value greater than or equal to 2 (e.g., 10). For example, since the supportable SCS values may be different for FR1 and FR2, the range of possible values of the bitmap size may differ depending on the FR. For example, in the case of FR1, the maximum value of the bitmap size may be 80. For example, the maximum value of the bitmap size may differ depending on the reference SCS value for the bitmap. For example, if the reference SCS value is 15 kHz, the maximum value of the bitmap size may be 20. For example, if the reference SCS value is 30 kHz, the maximum value of the bitmap size may be 40. For example, if the reference SCS value is 60 kHz, the maximum value of the bitmap size may be 80. For example, if the reference SCS value is 120 kHz, the maximum value of the bitmap size may be 160.

[0178] For example, the first UE may send information about the bitmap size and / or bitmap information to the second UE. Herein, for example, the size of the bitmap information may be the maximum value of the bitmap size. In this case, the first UE may use only the information corresponding to the bitmap size among the bitmap information as the bitmap information. For example, the second UE may determine that only the information corresponding to the bitmap size among the bitmap information is valid bitmap information based on the information about the bitmap size and the bitmap information. For example, in terms of signaling, it is assumed that the size of the bitmap information is 160 bits and the size of the bitmap is 20 bits. In this case, for example, the first UE may use only the most significant bits (MSBs) 20 bits among the 160-bit bitmap information as bitmap information, and the second UE may determine that only the MSBs 20 bits among the 160-bit bitmap information are valid bitmap information. For example, the first UE may use only the least significant bits (LSBs) 20 bits among the 160-bit bitmap information as bitmap information, and the second UE may determine that only the LSBs 20 bits among the 160-bit bitmap information are valid bitmap information.

[0179] Thereafter, the UE may exclude the time slots configured for S-SSB from the time slots indicated by the bitmap in the time slots in the reference SL resource in the radio frame. For example, the UE may infer or determine the time slots configured for S-SSB based on the time slot offset information and period information for S-SSB. After the above processing, the UE may configure the remaining time slots configured by the bitmap as time slots in the SL resource pool.

[0180] In the above embodiments, the bitmap method is mainly described, but the technical idea of the present disclosure can be expanded and applied to a form of indicating start and / or end slot information or a method of indicating other methods.

[0181] In the above embodiments, for example, the UE may apply a reference SL resource pattern and / or bitmap in units of time slots based on the SCS information related to the TDD UL DL configuration. For example, the UE may apply a reference SL resource pattern and / or bitmap in units of time slots based on the SCS information for the corresponding SL resource pool or SLBWP. For example, the UE may apply a reference SL resource pattern and / or bitmap in units of time slots based on the SCS information related to the PSBCH content. For example, the UE may apply a reference SL resource pattern and / or bitmap in units of time slots based on (pre-) configured or predefined reference SCS information. For example, the (pre-) configured or predefined reference SCS information may be 15kHz. For example, the (pre-) configured or predefined reference SCS information may be different according to FR1 or FR2.

[0182] If the reference SCS information for configuring the resource pool is configured separately for the UE, the corresponding SCS information value (i.e., u value) may be less than or equal to the reference SCS information value related to the PSBCH content and / or the reference SCS information value related to the TDD UL DL configuration. Alternatively, there may be no restriction, and in this case, if a portion of a plurality of time slots of the reference SL resource overlapping with the time slot corresponding to 1 bit in the bitmap and / or the time slot for TDD UL DL configuration and / or the time slot indicated by the PSBCH content according to the reference SCS information value for configuring the resource pool does not satisfy the SL usage condition (for example, the symbol corresponding to the number of SL symbols from the starting SL symbol in the corresponding time slot is a cell-specific UL symbol), the UE cannot enable the corresponding bit.

[0183] For example, the SL resource pool configuration may include frequency domain information. Depending on the carrier, in order to use resources for SL communication without wasting / discarding them, the network may send resource pool information including the number of RBs included in the resource pool and / or the starting RB index of the lowest subchannel to the UE. For example, the network may configure or pre-configure the number of RBs included in the resource pool and / or the starting RB index of the lowest subchannel for the UE. In this case, the number of RBs included in the resource pool may not be a multiple of the subchannel size. In the above situation, the subchannels included in the resource pool may have different sizes. For example, in the above situation, all subchannels except the first subchannel among the subchannels included in the resource pool may have a (pre) configured subchannel size. For example, in the above situation, all subchannels except the last subchannel among the subchannels included in the resource pool may have a (pre) configured subchannel size. For example, in the above situation, all subchannels except the middle subchannel among the subchannels included in the resource pool may have a (pre) configured subchannel size. In this case, for example, if the number of subchannels included in the resource pool is an even number, the middle subchannel in the resource pool may be a subchannel with a low index among the two subchannels located in the middle. For example, if the number of subchannels included in the resource pool is an even number, the middle subchannel in the resource pool may be a subchannel with a high index among the two subchannels located in the middle. For example, if the number of subchannels included in the resource pool is an even number, the middle subchannel in the resource pool may include the two subchannels located in the middle. In addition, for example, the size of the first subchannel may be a value obtained by subtracting a value obtained by multiplying the number of subchannels after subtracting 1 by the configured subchannel size from the number of RBs in the resource pool. For example, the size of the first subchannel may be obtained by Formula 1.

[0184] [Formula 1]

[0185] The size of the first subchannel

[0186] = Number of RBs in the resource pool - {(Number of subchannels - 1) × Configured subchannel size}

[0187] For example, the size of the last subchannel may be a value obtained by subtracting a value obtained by multiplying the number of subchannels minus 1 by the configured subchannel size from the number of RBs in the resource pool.

[0188] [Formula 2]

[0189] The size of the last subchannel

[0190] = Number of RBs in the resource pool - {(Number of subchannels - 1) × Configured subchannel size}

[0191] For example, the size of the middle subchannel may be a value obtained by subtracting a value obtained by multiplying the number of subchannels minus 1 by the configured subchannel size from the number of RBs in the resource pool.

[0192] [Formula 3]

[0193] The size of the middle subchannel

[0194] = Number of RBs in the resource pool - {(Number of subchannels - 1) × Configured subchannel size}

[0195] Furthermore, depending on the UE, subchannels with a size different from the configured subchannel size may not be used. For example, a UE of a certain version may not use subchannels with a size different from the configured subchannel size, while a UE of another version may use subchannels with a size different from the configured subchannel size. Furthermore, if UEs of different versions exist in the same resource pool, the method of interpreting the first SCI may differ depending on the UE version. For example, all or part of the bit information of the reserved field included in the first SCI may be used to indicate / represent the frequency domain resources and / or the UE version.

[0196] For example, the first UE can inform the second UE of the version of the first UE by using a reserved field (e.g., 1 bit) included in the SCI. For example, if the value of the reserved field is 0, the second UE can assume / determine that the first UE does not use a specific subchannel and interpret the frequency domain resource indicator. For example, if the value of the reserved field is 1, the second UE can estimate / determine the frequency resources used for the PSSCH by using the frequency domain resource indicator and another reserved field (e.g., 1 bit). Specifically, for example, if the field value of the frequency domain resource indicator is different depending on whether a specific subchannel is used, an additional reserved field (e.g., 1 bit) can be used as the frequency domain resource indicator. Otherwise, the second UE can interpret the existing frequency domain resource indicator by including a specific subchannel. Above, if the second UE interprets the frequency domain resource indicator by including a specific subchannel, the case where a specific subchannel is allocated separately can be excluded from the indicative value. That is, the PSCCH may not be sent through a specific subchannel. Alternatively, the second UE can always interpret the existing frequency domain resource indicator by including a specific subchannel. In this case, all combinations of PSSCH frequency assignments except for a specific subchannel may be represented, while some combinations of PSSCH frequency assignments including a specific subchannel may not be represented.

[0197] For example, if the first UE sends the value of the reserved field (e.g., 1 bit) and the frequency domain resource indicator value to the second UE through SCI, the second UE can estimate / determine the frequency resources for PSSCH based on the combination of the value of the reserved field (e.g., 1 bit) and the frequency domain resource indicator value. For example, if the value of the reserved field is 0, the second UE can interpret the frequency domain resource indicator of the remaining subchannels except for the specific subchannel. For example, if the value of the reserved field is 1, the first UE can indicate / indicate to the second UE the frequency resource allocation for PSSCH generated by including a specific subchannel. For example, in this case, at least one of the indicated PSSCH resources may include a specific subchannel. As above, if the second UE interprets the frequency domain resource indicator by including a specific subchannel, the case where a specific subchannel is allocated separately can be excluded from the indicative value. For example, if a first UE sets a bit value of the reserved field to 1, and a second UE interprets the frequency-domain resource indicator by including specific subchannels, the indexing of the frequency-domain resource indicator value may begin with the case where the number of allocated subchannels is 2, and if the second resource includes specific subchannels, the indicator value may be incremented based on the starting index of the possible third resource. Next, if the third resource includes specific subchannels, the indicator value may be incremented based on the starting index of the possible second resource. For example, these two orders may be reversed. Subsequently, the indexing method may be repeated while increasing the number of subchannels. For example, the above method may be used when a maximum of three resources are indicated in the first SCI. For example, if a first UE indicates a maximum of two resources in the SCI, and if a bit value of the reserved field is set to 1, and a second UE interprets the frequency-domain resource indicator by including specific subchannels, the indexing of the frequency-domain resource indicator value may begin with the case where the number of allocated subchannels is 2. In this case, if the second resource includes specific subchannels, when the number of allocated subchannels is 3, the indicator value may be incremented in the order in which the second resource includes specific subchannels. Next, it may be an indexed form of repeating the above method while increasing the number of subchannels again.

[0198] Alternatively, for example, all or some subchannels may be resized based on the number of RBs in the resource pool. For example, the number of subchannels in the resource pool may be set to the rounded-down value of the value obtained by dividing the number of RBs in the resource pool by the configured subchannel size. Subsequently, the subchannels may be resized using the rounded-down value obtained by dividing the number of RBs in the resource pool by the number of subchannels. Alternatively, the subchannels may be resized using the rounded-up value obtained by dividing the number of RBs in the resource pool by the number of subchannels.

[0199] Figure 14The process of determining a resource pool by a UE according to an embodiment of the present disclosure is shown. Figure 14 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0200] Reference Figure 14 In step S1410, the base station may send the TDD UL DL configuration to the UE. Figure 14 In the implementation manner, it is assumed that the sending UE and the receiving UE are within the coverage of the base station.

[0201] In step S1420, the base station may transmit information related to the start of the SL symbol and information related to the number of SL symbols (i.e., length) to the UE. For example, information related to the start of the SL symbol and information related to the number of SL symbols (i.e., length) may be configured for each SL BWP for the UE. For example, the base station may transmit an SL BWP configuration including information related to the start of the SL symbol and information related to the number of SL symbols (i.e., length) to the UE. In step S1430, the base station may transmit information related to a bitmap indicating / representing a resource pool to the UE.

[0202] In step S1440 , the transmitting UE and the receiving UE may determine a resource pool based on the TDD UL DL configuration, information related to the start of the SL symbol, information related to the number (ie, length) of SL symbols, and information related to the bitmap.

[0203] Specifically, for example, the UE may determine a plurality of second time slots by excluding one or more time slots in which at least one symbol among the SL symbols is not configured as a UL resource from the plurality of first time slots.

[0204] For example, if at least one symbol among the Yth, (Y+1), ..., (Y+X-1)th OFDM symbols in a specific time slot is not configured as a UL symbol (i.e., if at least one symbol among the Yth, (Y+1), ..., (Y+X-1)th OFDM symbols in a specific time slot does not correspond to a UL symbol), then the specific time slot may be excluded from the resource pool. For example, if the Yth, (Y+1), ..., (Y+X-1)th OFDM symbols in a specific time slot are all configured as UL symbols (i.e., if the Yth, (Y+1), ..., (Y+X-1)th OFDM symbols in a specific time slot all correspond to UL symbols), then the specific time slot may be included in the resource pool. Here, Y may indicate / represent the position of the starting symbol of the SL symbol, and X may indicate / represent the number (i.e., length) of the SL symbols.

[0205] Figure 15 The time slots excluded from the resource pool according to an embodiment of the present disclosure are shown. Figure 15 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0206] exist Figure 15 In the embodiment, it is assumed that symbols #9 to #13 in slot #N are configured as UL symbols using the TDD UL DL configuration. In this case, the UE can determine that symbols #9 to #13 in slot #N are configured as UL symbols based on the TDD UL DL configuration. Furthermore, it is assumed that symbols #7 to #13 are configured as SL symbols using the SL BWP configuration. In this case, Y can be 7, and X can be 7. In the above case, some symbols (i.e., symbols #7 to #8) among symbols #7 to #13 in slot #N may not be configured as UL symbols. In this case, slot #N can be excluded from the resource pool.

[0207] Figure 16 Time slots that may be included in a resource pool according to an embodiment of the present disclosure are shown. Figure 16 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0208] exist Figure 16 In the embodiment, it is assumed that symbols #4 to #13 in slot #K are configured as UL symbols using the TDD UL DL configuration. In this case, the UE can determine that symbols #4 to #13 in slot #K are configured as UL symbols based on the TDD UL DL configuration. Furthermore, it is assumed that symbols #5 to #13 are configured as SL symbols using the SL BWP configuration. In this case, Y can be 5 and X can be 9. In this case, all symbols #5 to #13 in slot #K can be configured as UL symbols. In this case, slot #K can be included in the resource pool.

[0209] Return to reference Figure 14 , In addition, for example, the UE may determine a plurality of third time slots by excluding one or more time slots configured with S-SSB from a plurality of second time slots. In addition, for example, the UE may determine a plurality of fourth time slots by excluding one or more reserved time slots from a plurality of third time slots. In addition, for example, the UE may determine a plurality of fifth time slots among a plurality of fourth time slots as a resource pool based on a bitmap. Specifically, for example, the UE may apply a bitmap to a plurality of fourth time slots. In this case, among a plurality of fourth time slots, the fifth time slots corresponding to the bitmap are Figure 1 The corresponding time slots may be included in the resource pool, and the time slots corresponding to bitmap 0 may be excluded from the resource pool.

[0210] In step S1450, the transmitting UE may transmit the PSCCH to the receiving UE based on the resource pool. In step S1460, the transmitting UE may transmit the PSSCH associated with the PSCCH to the receiving UE based on the resource pool.

[0211] Figure 17 The process of determining a resource pool by a UE according to an embodiment of the present disclosure is shown. Figure 17 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0212] Reference Figure 17 In step S1710, the base station may send the TDD UL DL configuration to the UE. Figure 17 In the implementation manner, it is assumed that the sending UE is within the coverage of the base station and the receiving UE is outside the coverage of the base station.

[0213] In step S1720, the base station may transmit information related to the start of a SL symbol and information related to the number of SL symbols (i.e., length) to the UE. For example, information related to the start of a SL symbol and information related to the number of SL symbols (i.e., length) may be configured for each SL BWP for the UE. For example, the base station may transmit an SL BWP configuration including information related to the start of a SL symbol and information related to the number of SL symbols (i.e., length) to the UE. In step S1730, the base station may transmit information related to a bitmap indicating / representing a resource pool to the UE.

[0214] In step S1740, the transmitting UE may determine the resource pool based on the TDD UL DL configuration, information related to the start of the SL symbol, information related to the number of SL symbols (i.e., length), and information related to the bitmap. Herein, since the detailed method of determining the resource pool has been described above, it is omitted.

[0215] In step S1750, the transmitting UE may transmit an S-SSB to the receiving UE. For example, the S-SSB may include information related to the SL time slot determined by the transmitting UE.

[0216] In addition, in step S1760, the transmitting UE may transmit the PSCCH to the receiving UE based on the resource pool. In addition, in step S1770, the transmitting UE may transmit the PSSCH associated with the PSCCH to the receiving UE based on the resource pool.

[0217] Based on various embodiments of the present disclosure, if the network configures a SL resource pool for the UE, UEs within coverage and UEs outside coverage can efficiently perform SL communication. In addition, the UE can ensure as many SL available time slots as possible based on the TDD UL DL mode of the Uu link, and the UE can efficiently indicate / represent the TDD UL DL mode through the PSBCH.

[0218] Figure 18 A method for performing wireless communication by a first device according to an embodiment of the present disclosure is shown. Figure 18 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0219] Reference Figure 18 In step S1810, the first device may receive a time division duplex uplink-downlink (TDD UL-DL) configuration including information related to uplink (UL) resources from a base station. In step S1820, the first device may receive information related to the start of a sublink (SL) symbol, information related to the number of SL symbols, and a bitmap representing one or more time slots included in the SL resource pool from the base station. In step S1830, the first device may determine the SL resource pool. For example, a plurality of second time slots may be determined by excluding one or more time slots in which at least one symbol among the SL symbols is not configured as an UL resource from a plurality of first time slots, and a plurality of third time slots may be determined by excluding one or more time slots in which a sublink synchronization signal block (S-SSB) is configured from a plurality of second time slots, and a plurality of fourth time slots may be determined by excluding one or more reserved time slots from a plurality of third time slots, and a plurality of fifth time slots among a plurality of fourth time slots may be determined as the SL resource pool based on the bitmap.

[0220] For example, based on the number of the plurality of third time slots not being a multiple of the bitmap size, one or more reserved time slots may be excluded from the plurality of third time slots. For example, the number of the plurality of fourth time slots may be a multiple of the bitmap size. For example, the minimum value of the bitmap size may be 10. For example, the maximum value of the bitmap size may be 160.

[0221] In addition, for example, the first device may obtain the number of SL slots based on information related to UL resources, reference subcarrier spacing (SCS) information related to the TDD UL-DL configuration, and SCS information related to the SL bandwidth part (BWP). In addition, for example, the first device may send a physical sidelink broadcast channel (PSBCH) including information related to the number of SL slots to the second device. For example, the UL resources may include at least one of UL slots or UL symbols. For example, the number of SL slots may be obtained by converting the number of UL slots and the number of UL symbols based on SCS information related to the SL BWP. For example, based on one or more symbols in the first slot determined based on the number of SL symbols all configured as UL resources and the start of the SL symbols, the first slot may be determined as the SL slot. For example, based on at least one symbol among one or more symbols in the second slot determined based on the number of SL symbols not configured as UL resources and the start of the SL symbols, the second slot may not be determined as the SL slot.

[0222] For example, a plurality of fifth time slots associated with 1 in the bitmap among a plurality of fourth time slots may be included in the SL resource pool, and a plurality of fifth time slots associated with 0 in the bitmap among a plurality of fourth time slots may be excluded from the SL resource pool.

[0223] For example, information related to the start of the SL symbol and information related to the number of SL symbols may be configured for each SL BWP. For example, a bitmap may be configured for each SL resource pool.

[0224] The proposed method can be applied to devices based on various embodiments of the present disclosure. First, the processor 102 of the first device 100 can control the transceiver 106 to receive a time division duplex uplink-downlink (TDD UL-DL) configuration including information related to uplink (UL) resources from a base station. In addition, the processor 102 of the first device 100 can control the transceiver 106 to receive information related to the start of a sublink (SL) symbol, information related to the number of SL symbols, and a bitmap representing one or more time slots included in the SL resource pool from the base station. In addition, the processor 102 of the first device 100 can determine the SL resource pool. For example, multiple second time slots can be determined by excluding one or more time slots in which at least one SL symbol is not configured as an UL resource from multiple first time slots, multiple third time slots can be determined by excluding one or more time slots configured with a sub-link synchronization signal block (S-SSB) from multiple second time slots, multiple fourth time slots can be determined by excluding one or more reserved time slots from multiple third time slots, and multiple fifth time slots among multiple fourth time slots can be determined as an SL resource pool based on a bitmap.

[0225] Based on 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, the one or more processors may execute the instructions to: receive a time division duplex uplink-downlink (TDD UL-DL) configuration including information related to uplink (UL) resources from a base station; receive information related to the start of a side link (SL) symbol, information related to the number of SL symbols, and a bitmap representing one or more time slots included in a SL resource pool from a base station; and determine the SL resource pool. For example, multiple second time slots can be determined by excluding one or more time slots in which at least one SL symbol is not configured as an UL resource from multiple first time slots, multiple third time slots can be determined by excluding one or more time slots configured with a sub-link synchronization signal block (S-SSB) from multiple second time slots, multiple fourth time slots can be determined by excluding one or more reserved time slots from multiple third time slots, and multiple fifth time slots among multiple fourth time slots can be determined as an SL resource pool based on a bitmap.

[0226] Based on an embodiment of the present disclosure, a device configured to control a first user equipment (UE) performing wireless communication may be provided. For example, the device may include: one or more processors; and one or more memories, the one or more memories being operably connected to the one or more processors and storing instructions. For example, the one or more processors may execute the instructions to: receive a time division duplex uplink-downlink (TDD UL-DL) configuration including information related to uplink (UL) resources from a base station; receive information related to the start of a side link (SL) symbol, information related to the number of SL symbols, and a bitmap representing one or more time slots included in a SL resource pool from a base station; and determine the SL resource pool. For example, multiple second time slots can be determined by excluding one or more time slots in which at least one SL symbol is not configured as an UL resource from multiple first time slots, multiple third time slots can be determined by excluding one or more time slots configured with a sub-link synchronization signal block (S-SSB) from multiple second time slots, multiple fourth time slots can be determined by excluding one or more reserved time slots from multiple third time slots, and multiple fifth time slots among multiple fourth time slots can be determined as an SL resource pool based on a bitmap.

[0227] Based on the embodiments of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, when the instructions are executed, they may cause a first device to: receive a time division duplex uplink-downlink (TDD UL-DL) configuration including information related to uplink (UL) resources from a base station; receive information related to the start of a sublink (SL) symbol, information related to the number of SL symbols, and a bitmap representing one or more time slots included in a SL resource pool from a base station; and determine the SL resource pool. For example, a plurality of second time slots may be determined by excluding one or more time slots in which at least one symbol among the SL symbols is not configured as a UL resource from a plurality of first time slots, a plurality of third time slots may be determined by excluding one or more time slots configured with a sublink synchronization signal block (S-SSB) from a plurality of second time slots, a plurality of fourth time slots may be determined by excluding one or more reserved time slots from a plurality of third time slots, and a plurality of fifth time slots among a plurality of fourth time slots may be determined as a SL resource pool based on the bitmap.

[0228] Figure 19 A method for a base station to perform wireless communication according to an embodiment of the present disclosure is shown. Figure 19 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0229] Reference Figure 19 In step S1910, the first device may send a time division duplex uplink-downlink (TDD UL-DL) configuration including information related to uplink (UL) resources to the first device. In step S1920, the base station may send information related to the start of a sublink (SL) symbol, information related to the number of SL symbols, and a bitmap representing one or more time slots included in the SL resource pool to the first device. For example, a plurality of second time slots may be determined by excluding one or more time slots in which at least one symbol among the SL symbols is not configured as an UL resource from a plurality of first time slots, a plurality of third time slots may be determined by excluding one or more time slots in which a sublink synchronization signal block (S-SSB) is configured from a plurality of second time slots, a plurality of fourth time slots may be determined by excluding one or more reserved time slots from a plurality of third time slots, and a plurality of fifth time slots among a plurality of fourth time slots may be determined as the SL resource pool based on the bitmap.

[0230] The proposed method can be applied to devices based on various embodiments of the present disclosure. First, the processor 202 of the base station 200 can control the transceiver 206 to send a time division duplex uplink-downlink (TDD UL-DL) configuration including information related to uplink (UL) resources to the first device. In addition, the processor 202 of the base station 200 can control the transceiver 206 to send information related to the start of the sublink (SL) symbol, information related to the number of SL symbols, and a bitmap representing one or more time slots included in the SL resource pool to the first device. For example, a plurality of second time slots can be determined by excluding one or more time slots in which at least one symbol among the SL symbols is not configured as an UL resource from a plurality of first time slots, a plurality of third time slots can be determined by excluding one or more time slots configured with a sublink synchronization signal block (S-SSB) from a plurality of second time slots, a plurality of fourth time slots can be determined by excluding one or more reserved time slots from a plurality of third time slots, and a plurality of fifth time slots among a plurality of fourth time slots can be determined as an SL resource pool based on the bitmap.

[0231] Based on an embodiment of the present disclosure, a base station configured to perform wireless communication may be provided. For example, the base station 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, the one or more processors may execute the instructions to: send a time division duplex uplink-downlink (TDD UL-DL) configuration including information related to uplink (UL) resources to a first device; and send information related to the start of a side link (SL) symbol, information related to the number of SL symbols, and a bitmap representing one or more time slots included in an SL resource pool to the first device. For example, multiple second time slots can be determined by excluding one or more time slots in which at least one SL symbol is not configured as an UL resource from multiple first time slots, multiple third time slots can be determined by excluding one or more time slots configured with a sub-link synchronization signal block (S-SSB) from multiple second time slots, multiple fourth time slots can be determined by excluding one or more reserved time slots from multiple third time slots, and multiple fifth time slots among multiple fourth time slots can be determined as an SL resource pool based on a bitmap.

[0232] Based on an embodiment of the present disclosure, a device configured to control a base station that performs wireless communication may be provided. For example, the device may include: one or more processors; and one or more memories, the one or more memories being operably connected to the one or more processors and storing instructions. For example, the one or more processors may execute the instructions to: send a time division duplex uplink-downlink (TDD UL-DL) configuration including information related to uplink (UL) resources to a first user equipment (UE); and send information related to the start of a side link (SL) symbol, information related to the number of SL symbols, and a bitmap representing one or more time slots included in an SL resource pool to the first UE. For example, multiple second time slots can be determined by excluding one or more time slots in which at least one SL symbol is not configured as an UL resource from multiple first time slots, multiple third time slots can be determined by excluding one or more time slots configured with a sub-link synchronization signal block (S-SSB) from multiple second time slots, multiple fourth time slots can be determined by excluding one or more reserved time slots from multiple third time slots, and multiple fifth time slots among multiple fourth time slots can be determined as an SL resource pool based on a bitmap.

[0233] Based on the embodiments of the present disclosure, a non-transitory computer-readable storage medium storing instructions can be provided. For example, when the instructions are executed, the base station can cause the base station to: send a time division duplex uplink-downlink (TDD UL-DL) configuration including information related to uplink (UL) resources to the first device; and send information related to the start of a sublink (SL) symbol, information related to the number of SL symbols, and a bitmap representing one or more time slots included in the SL resource pool to the first device. For example, a plurality of second time slots can be determined by excluding one or more time slots in which at least one symbol among the SL symbols is not configured as an UL resource from a plurality of first time slots, a plurality of third time slots can be determined by excluding one or more time slots configured with a sublink synchronization signal block (S-SSB) from a plurality of second time slots, a plurality of fourth time slots can be determined by excluding one or more reserved time slots from a plurality of third time slots, and a plurality of fifth time slots among a plurality of fourth time slots can be determined as an SL resource pool based on the bitmap.

[0234] Various embodiments of the present disclosure may be combined with each other.

[0235] Hereinafter, devices to which respective embodiments of the present disclosure can be applied will be described.

[0236] 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).

[0237] Hereinafter, a more detailed description will be given 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.

[0238] Figure 20 A communication system (1) according to an embodiment of the present disclosure is shown.

[0239] Reference Figure 20 , 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 a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, etc. Handheld devices may include smartphones, 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.

[0240] Here, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may include, in addition to LTE, NR, and 6G, narrowband IoT for low-power communication. In this case, for example, NB-IoT technology may be an example of low-power wide area network (LPWAN) technology and may be implemented as standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may perform communication based on LTE-M technology. In this case, as an example, LTE-M technology may be an example of LPWAN and may be referred to by various names, including enhanced machine type communication (eMTC). For example, LTE-M technology may be implemented as at least any one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-bandwidth limited (non-BL), 5) LTE-MTC, 6) LTE machine type communication, and / or 7) LTE M, and is not limited to the above names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may include at least one of ZigBee, Bluetooth, and a low-power wide area network (LPWAN) considering low-power communication, and is not limited to the above names. As an example, ZigBee technology can generate a personal area network (PAN) related to low / low-power digital communication based on various standards including IEEE 802.15.4, and can be referred to by various names.

[0241] Wireless devices 100a to 100f can be connected to a network 300 via a BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can be connected to an AI server 400 via the network 300. The network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via the BS 200 / network 300, wireless devices 100a to 100f can perform direct communication (e.g., sidelink communication) with each other without going through the BS / network. For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0242] Wireless communication / connection 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS 200 or BS 200 / BS 200. Here, the wireless communication / connection can be established via 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 via wireless communication / connection 150a and 150b. For example, wireless communication / connection 150a and 150b can send / receive signals via various physical channels. To this end, various configuration information configuration processes for transmitting / 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.

[0243] Figure 21 A wireless device according to an embodiment of the present disclosure is shown.

[0244] Reference Figure 21 , the first wireless device (100) and the second wireless device (200) can transmit radio signals through various RATs (e.g., LTE and NR). Herein, {the first wireless device (100) and the second wireless device (200)} may correspond to Figure 20 {wireless device (100x) and BS (200)} and / or {wireless device (100x) and wireless device (100x)} in.

[0245] 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 (antenna units) 108. The processor(s) 102 may control the memory(s) 104 and / or the transceiver(s) 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed herein. For example, the processor(s) 102 may process information in the memory(s) 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver(s) 106. The processor(s) 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory(s) 104. The memory(s) 104 may be connected to the processor(s) 102 and may store various information related to the operation of the processor(s) 102. For example, the memory(s) 104 may store software code including instructions for executing part or all of the processing controlled by the processor(s) 102 or for executing the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in this document. Here, the processor(s) 102 and the memory(s) 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver(s) 106 may be connected to the processor(s) 102 and transmit and / or receive radio signals via the antenna(s) 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver(s) 106 may be used interchangeably with the radio frequency (RF) unit(s). In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0246] 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 processor(s) 202 may control the memory(s) 204 and / or the transceiver(s) 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed herein. For example, the processor(s) 202 may process information in the memory(s) 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the transceiver(s) 206. The processor(s) 202 may receive a radio signal including fourth information / signals through the transceiver(s) 106, and then store information obtained by processing the fourth information / signals in the memory(s) 204. The memory(s) 204 may be connected to the processor(s) 202 and may store various information related to the operation of the processor(s) 202. For example, the memory(s) 204 may store software code including instructions for executing part or all of the processing controlled by the processor(s) 202 or for executing the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in this document. Here, the processor(s) 202 and the memory(s) 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver(s) 206 may be connected to the processor(s) 202 and transmit and / or receive radio signals via the antenna(s) 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver(s) 206 may be used interchangeably with the RF unit(s). In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0247] The hardware elements of wireless devices 100 and 200 will be described in more detail below. One or more protocol layers may be, but are not limited to, implemented by 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, procedures, proposals, methods, and / or operational flows disclosed herein. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed herein. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed herein, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 can receive signals (e.g., baseband signals) from one or more transceivers 106 and 206 and obtain PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document.

[0248] The one or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. The 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 the 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. The firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be included in the one or more processors 102 and 202 or stored in one or more memories 104 and 204, thereby being driven by the 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 code, commands, and / or command sets.

[0249] One or more memories 104 and 204 can be connected to one or more processors 102 and 202 and can store various types of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories 104 and 204 can be composed of read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drive, registers, cash memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 can be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 can be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0250] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels described in the methods and / or operational flows 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 described in the descriptions, functions, processes, proposals, methods, and / or operational flows 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 transmit and receive radio signals. For example, one or more processors 102 and 202 may control the one or more transceivers 106 and 206 to transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may control the one or more transceivers 106 and 206 to receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 can be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 can be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document via one or more antennas 108 and 208. In this document, one or more antennas can be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 can convert received radio signals / channels, etc. from RF band signals to baseband signals so that the received user data, control information, radio signals / channels, etc. can be processed by one or more processors 102 and 202. One or more transceivers 106 and 206 can convert the user data, control information, radio signals / channels, etc. processed by one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more transceivers 106 and 206 can include (analog) oscillators and / or filters.

[0251] Figure 22 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0252] Reference Figure 22 , 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). Figure 22 operations / functions, not limited to Figure 21 The processor (102, 202) and / or transceiver (106, 206) of Figure 21The processor (102, 202) and / or transceiver (106, 206) are implemented Figure 22 For example, you can Figure 21 Alternatively, the processor (102, 202) can implement blocks 1010 to 1060. Figure 21 The processor (102, 202) implements blocks 1010 to 1050 and can be Figure 21 The transceiver (106, 206) is used to implement block 1060.

[0253] Can be passed Figure 22 The signal processing circuit (1000) converts the codeword into a radio signal. In this article, 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 via various physical channels (e.g., PUSCH and PDSCH).

[0254] 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) on the complex modulation symbols. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.

[0255] The resource mapper 1050 can 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 can generate a radio signal from the mapped modulation symbols, and the generated radio signal can 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 upconverter.

[0256] Can be used with Figure 22 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. Figure 21 100, 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 shown) for receiving a signal may include a signal restorer, a resource demapper, a post-coding process, a demodulator, a descrambler, and a decoder.

[0257] Figure 23 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 Figure 20 ).

[0258] Reference Figure 23 , the wireless device (100, 200) may correspond to Figure 21 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 / memory (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 Figure 21 One or more processors (102, 202) and / or one or more memories (104, 204). For example, the transceiver(s) (114) may include Figure 21The control unit (120) is electrically connected to the communication unit (110), the memory (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 memory unit (130). The control unit (120) can transmit information stored in the memory unit (130) to the outside (e.g., other communication devices) via the communication unit (110) through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit (110) through a wireless / wired interface in the memory unit (130).

[0259] The additional component (140) may be configured in various ways depending on the type of 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 ( Figure 20 100a), vehicles ( Figure 20 100b-1 and 100b-2), XR devices ( Figure 20 100c), handheld device ( Figure 20 100d), household appliances ( Figure 20 100e), IoT devices ( Figure 20 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 ( Figure 20 400), BS( Figure 20 200), network nodes, etc. Depending on the use case / service, the wireless device can be used in a mobile or fixed place.

[0260] exist Figure 23In the wireless device (100, 200), the various elements, components, units / parts and / or modules in the wireless device (100, 200) can all 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 through a wired interface, 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 memory ( 130 ) may be constructed by random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, nonvolatile memory, and / or combinations thereof.

[0261] Hereinafter, the implementation will be described in detail with reference to the accompanying drawings. Figure 23 .

[0262] Figure 24 A handheld device according to an embodiment of the present disclosure is shown. The handheld device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch 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).

[0263] Reference Figure 24 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 Figure 23 Frame 110 to 130 / 140.

[0264] The communication unit 110 can send and receive signals (e.g., data signals and control signals) to and from other wireless devices or a base station. The control unit 120 can perform various operations by controlling the components of the handheld device 100. The control unit 120 may include an application processor (AP). The storage unit 130 can store data / parameters / programs / codes / commands required to operate the handheld device 100. The storage unit 130 can store input / output data / information. The power supply unit 140a can supply power to the handheld device 100 and may include wired / wireless charging circuits, a battery, etc. The interface unit 140b can support connection between the handheld device 100 and other external devices. The interface unit 140b may include various ports for connecting to external devices (e.g., an audio I / O port and a video I / O port). The I / O unit 140c can input or output user-input video information / signals, audio information / signals, data, and / or information. The I / O unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and / or a haptic module.

[0265] 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 transmit the converted radio signals directly 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.

[0266] Figure 25 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. The vehicle or autonomous vehicle can be implemented by a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0267] Reference Figure 25 , 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 Figure 23 Box 110 / 130 / 140.

[0268] The communication unit 110 can send and receive signals (e.g., data signals and control signals) to and from external devices such as other vehicles, base stations (e.g., gNBs and roadside units), and servers. The control unit 120 can perform various operations by controlling components of the vehicle or autonomous vehicle 100. The control unit 120 may include an electronic control unit (ECU). The drive unit 140a can 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 system, etc. The power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and may include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c can obtain vehicle status, external environment information, user information, etc. The sensor unit 140 c 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 location module, a vehicle forward / backward 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 140 d may implement a technology for maintaining a lane in which the vehicle is traveling, a technology for automatically adjusting the speed (e.g., adaptive cruise control), a technology for autonomously driving along a determined path, a technology for driving by automatically setting a path with a destination set, etc.

[0269] For example, the communication unit 110 can receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d can generate an autonomous driving path and driving plan based on the acquired data. The control unit 120 can control the drive unit 140a so that the vehicle or autonomous driving vehicle 100 can move along the autonomous driving path according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit 110 can aperiodically / periodically acquire the latest traffic information data from the external server and acquire surrounding traffic information data from neighboring vehicles. During autonomous driving, the sensor unit 140c can acquire vehicle status and / or surrounding environment information. The autonomous driving unit 140d can update the autonomous driving path and driving plan based on the newly acquired data / information. The communication unit 110 can transmit information about the vehicle's location, autonomous driving path, and / or driving plan to the external server. The external server can use AI technology, etc. based on the information collected from the vehicle or autonomous driving vehicle to predict traffic information data and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0270] The claims in this specification can be combined in various ways. For example, the technical features in the method claims of this specification can be combined to be implemented or performed in a device, and the technical features in the device claims can 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 can 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 can 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 steps of: receiving a time division duplex uplink-downlink TDD UL-DL configuration from the network; receiving, from the network, a configuration for the number N of symbols used for a secondary link SL in a time slot and a starting symbol for the SL in a time slot; and The physical secondary link shared channel PSSCH is transmitted based on the SL resource pool. Wherein, the set of time slots belongs to the SL resource pool, The set of time slots does not include one or more time slots configured with a sidelink-synchronization signal SS / physical sidelink broadcast channel PSBCH block S-SSB, and The set of time slots includes the following one or more time slots: in each of the one or more time slots, all N symbols starting from the start symbol are configured as UL through the TDD UL-DL configuration.

2. The method according to claim 1, further comprising the steps of: Obtain information of a bitmap representing the set of time slots in the SL resource pool.

3. The method according to claim 2, wherein: The minimum value of the bitmap size is 10.

4. The method according to claim 2, wherein: The maximum size of the bitmap is 160.

5. The method according to claim 1, wherein The time slots in the set of time slots are SL time slots, and the method further comprises the following steps: Obtaining the number of the SL time slots based on UL resources, reference subcarrier spacing SCS information related to the TDD UL-DL configuration, and SCS information related to the SL bandwidth part BWP; and A PSBCH including information related to the number of SL slots is transmitted to the second device.

6. The method according to claim 5, wherein: The UL resource includes at least one of a UL time slot or a UL symbol.

7. The method according to claim 5, wherein: The number of the SL slots is obtained by converting the number of UL slots and the number of UL symbols based on the SCS information related to the SL BWP.

8. The method according to claim 5, wherein Based on the fact that all N symbols starting from the start symbol in the first time slot are configured as the UL resources, the first time slot is determined to be an SL time slot.

9. The method according to claim 5, wherein: Based on the fact that at least one symbol among N symbols starting from the start symbol in the second slot is not configured as the UL resource, the second slot is not determined as the SL slot.

10. The method according to claim 2, wherein: One or more bits in the bitmap set to 1 indicate the set of time slots in the SL resource pool, and One or more bits in the bitmap set to 0 indicate one or more time slots not included in the SL resource pool.

11. The method according to claim 1, wherein The start symbol and N are configured for each SL bandwidth part BWP.

12. The method according to claim 2, wherein: The bitmap is configured for each SL resource pool.

13. A first device configured to perform 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: receiving a time division duplex uplink-downlink TDD UL-DL configuration from the network; receiving, from the network, a configuration for the number N of symbols used for a secondary link SL in a time slot and a starting symbol for the SL in a time slot; and The physical secondary link shared channel PSSCH is transmitted based on the SL resource pool. Wherein, the set of time slots belongs to the SL resource pool, The set of time slots does not include one or more time slots configured with a sidelink-synchronization signal SS / physical sidelink broadcast channel PSBCH block S-SSB, and The set of time slots includes the following one or more time slots: in each of the one or more time slots, all N symbols starting from the start symbol are configured as UL through the TDD UL-DL configuration.

14. A device configured to control a first user equipment (UE) performing wireless communication, the device comprising: one or more processors; as well as one or more memories operatively connected to the one or more processors and storing instructions, wherein the one or more processors execute the instructions to: receiving a time division duplex uplink-downlink TDD UL-DL configuration from the network; receiving, from the network, a configuration for the number N of symbols used for a secondary link SL in a time slot and a starting symbol for the SL in a time slot; and The physical secondary link shared channel PSSCH is transmitted based on the SL resource pool. Wherein, the set of time slots belongs to the SL resource pool, The set of time slots does not include one or more time slots configured with a sidelink-synchronization signal SS / physical sidelink broadcast channel PSBCH block S-SSB, and The set of time slots includes the following one or more time slots: in each of the one or more time slots, all N symbols starting from the start symbol are configured as UL through the TDD UL-DL configuration.

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