Method and apparatus for transmitting information related to SL time slots in NR V2X

Abstract

A method for operating a first device (100) in a wireless communication system is proposed. The method may include the following steps: receiving TDD-UL-DL configuration information including information related to a first time slot pattern and information related to a second time slot pattern from a base station (300); acquiring the number of first SL time slots related to the first time slot pattern and the number of second SL time slots related to the second time slot pattern based on a first SCS related to SL communication and the TDD-UL-DL configuration information; and transmitting a PSBCH to a second device (200), the PSBCH including information related to the number of the first SL time slots and information related to the number of the second SL time slots.

Description

Technical Field

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

[0002] Sidelink (SL) communication is a communication scheme in which a direct link is established between user equipments (UEs) and the UEs 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, 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.

[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 Solution

[0015] According to an embodiment, a method for operating a first device 100 in a wireless system is proposed. The method may include: receiving time division duplex-uplink-downlink (TDD-UL-DL) configuration information from a base station 300, the TDD-UL-DL configuration information including information related to a first slot pattern and information related to a second slot pattern; obtaining the number of first side link (SL) slots related to the first slot pattern and the number of second SL slots related to the second slot pattern based on a first subcarrier spacing (SCS) related to SL communication and the TDD-UL-DL configuration information; and transmitting a physical side link broadcast channel (PSBCH) including information related to the number of first SL slots and information related to the number of second SL slots to a second device 200.

[0016] Technical Effects

[0017] A user equipment (UE) can efficiently perform SL communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This diagram describes NR-based V2X communication compared to V2X communication based on RATs used before NR.

[0019] Figure 2 The structure of the NR system according to the embodiment of the present disclosure is shown.

[0020] Figure 3 The functional division between NG-RAN and 5GC based on an embodiment of the present disclosure is shown.

[0021] Figure 4 A radio protocol architecture according to an embodiment of the present disclosure is shown.

[0022] Figure 5 The structure of the NR system according to the embodiment of the present disclosure is shown.

[0023] Figure 6 The structure of the time slot of the NR frame based on the embodiment of the present disclosure is shown.

[0024] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown.

[0025] Figure 8 The radio protocol architecture of SL communication based on an embodiment of the present disclosure is shown.

[0026] Figure 9 A UE performing V2X or SL communication according to an embodiment of the present disclosure is shown.

[0027] Figure 10A 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.

[0028] Figure 11 Three types of casts based on embodiments of the present disclosure are shown.

[0029] Figure 12 DL slots, DL symbols, UL slots, and UL symbols allocated within a DL / UL cycle according to an embodiment of the present disclosure are shown.

[0030] Figure 13 SL slots included in a period of one pattern according to SL TDD configuration according to an embodiment of the present disclosure are shown.

[0031] Figure 14 A process for a TX UE to transmit a PSBCH to an RX UE according to an embodiment of the present disclosure is shown.

[0032] Figure 15 A process of transmitting a PSBCH by a first device according to an embodiment of the present disclosure is shown.

[0033] Figure 16 A process of performing SL communication by a second device according to an embodiment of the present disclosure is shown.

[0034] Figure 17 A communication system 1 according to an embodiment of the present disclosure is shown.

[0035] Figure 18 A wireless device according to an embodiment of the present disclosure is shown.

[0036] Figure 19 A signal processing circuit for transmitting signals according to an embodiment of the present disclosure is shown.

[0037] Figure 20 Another example of a wireless device according to an embodiment of the present disclosure is shown.

[0038] Figure 21 A handheld device according to an embodiment of the present disclosure is shown.

[0039] Figure 22 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0040] In this specification, "A or B" may mean "only A", "only B", or "both A and B". In other words, in this specification, "A or B" may be interpreted as "A and / or B". For example, in this specification, "A, B or C" may mean "only A", "only B", "only C", or "any combination of A, B, and C".

[0041] As used in this specification, 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".

[0042] In this specification, “at least one of A and B” may mean “only A”, “only B”, or “both A and B”. In addition, in this specification, the expression “at least one of A or B” or “at least one of A and / or B” may be interpreted as “at least one of A and B”.

[0043] In addition, in this specification, “at least one of A, B, and C” may mean “only A,” “only B,” “only C,” or “any combination of A, B, and C.” In addition, “at least one of A, B, or C” or “at least one of A, B, and / or C” may mean “at least one of A, B, and C.”

[0044] In addition, the brackets used in this specification 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 this specification 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".

[0045] The technical features described in each of the drawings in this specification may be implemented separately or simultaneously.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] Figure 2 The structure of the NR system according to the 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.

[0050] Reference Figure 2, the next generation radio access network (NG-RAN) may include a BS 20 that provides user plane and control plane protocol termination 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.

[0051] 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.

[0052] Figure 3 The functional division between NG-RAN and 5GC based on an embodiment of the present disclosure is shown. Figure 3 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0053] 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.

[0054] 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.

[0055] Figure 4 A radio protocol architecture according to an embodiment of the present disclosure is shown. Figure 4 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 4 (a) shows the radio protocol architecture for the user plane, and Figure 4 (b) shows a radio protocol architecture for the 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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).

[0060] The Radio Resource Control (RRC) layer is defined only in the control plane. The RRC layer controls physical, transport, and logical channels, including 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, the RLC layer, and the PDCP (Packet Data Convergence Protocol) layer) to transmit data between the UE and the network.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] Logical channels that exist at a higher layer than the transport channel and are mapped to the 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), and the like.

[0067] 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.

[0068] Figure 5 The structure of the NR system based on the 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.

[0069] 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 based on the subcarrier spacing (SCS). Each time slot can include 12 or 14 OFDM (A) symbols depending on the cyclic prefix (CP).

[0070] 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).

[0071] Table 1 below shows the number of time slots (N) per symbol based on 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 ).

[0072] [Table 1]

[0073] <![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

[0074] 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 based on the SCS in case of using the extended CP.

[0075] [Table 2]

[0076] <![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

[0077] 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.

[0078] 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.

[0079] 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).

[0080] [Table 3]

[0081] Frequency range specification Corresponding frequency range Subcarrier spacing (SCS) FR1 450MHz–6000MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0082] 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).

[0083] [Table 4]

[0084] Frequency range specification Corresponding frequency range Subcarrier spacing (SCS) FR1 410MHz–7125MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0085] Figure 6 The structure of the time slot of the NR frame based on the embodiment of the present disclosure is shown. Figure 6The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] Hereinafter, the bandwidth part (BWP) and the carrier will be described in detail.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] For example, the BWP can be one of an activated BWP, an initial BWP, and / or a default BWP. For example, the UE cannot monitor the downlink radio link quality in DL BWPs other than the activated DL BWP within the primary cell (PCell). For example, the UE cannot receive PDCCH, physical downlink shared channel (PDSCH), or channel state information-reference signal (CSI-RS) (except for RRM) from outside the activated DL BWP. For example, the UE cannot trigger channel state information (CSI) reporting for an inactive DL BWP. For example, the UE cannot send physical uplink control channel (PUCCH) or physical uplink shared channel (PUSCH) from outside the inactive DL BWP. For example, in the downlink, the initial BWP can 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 can be given by the system information block (SIB) for the random access procedure. For example, the default BWP can 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) within a predetermined period of time, the UE may switch the active BWP of the UE to the default BWP.

[0094] 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.

[0095] 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, the number of BWPs is 3.

[0096] 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.

[0097] 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.

[0098] Hereinafter, V2X or SL communication will be described.

[0099] Figure 8 The radio protocol architecture of SL communication based on 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) shows the user plane protocol stack, and Figure 8 (b) shows the control plane protocol stack.

[0100] Next, the side link synchronization signal (SLSS) and the synchronization information will be described in detail.

[0101] The SLSS may include a primary sidelink synchronization signal (PSSS) and a secondary sidelink synchronization signal (SSSS) as SL specific sequences. The PSSS may be referred to as a sidelink primary synchronization signal (S-PSS), and the SSSS may be referred to as a sidelink secondary synchronization signal (S-SSS). For example, an M sequence of length 127 may be used for the S-PSS, and a gold sequence of length 127 may be used for the S-SSS. For example, the UE may use the S-PSS for initial signal detection and synchronization acquisition. For example, the UE may use the S-PSS and the S-SSS for acquiring detailed synchronization and for detecting the synchronization signal ID.

[0102] The physical sidelink broadcast channel (PSBCH) can be a (broadcast) channel for transmitting default (system) information, which must be known by 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 CRC.

[0103] 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, sidelink synchronization signal block (S-SSB)). The S-SSB can have the same parameter set (i.e., SCS and CP length) as the physical sidelink control channel (PSCCH) / physical sidelink shared channel (PSSCH) in the carrier, and the transmission bandwidth can exist within the (pre-) configured sidelink (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.

[0104] 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.

[0105] 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 / 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 device 100, and UE 2 may be second device 200.

[0106] 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.

[0107] Here, if UE 1 is within the connection range of the BS, the BS can inform UE 1 of the resource pool. Otherwise, if UE 1 is out of the connection range of the BS, another UE can inform UE 1 of the resource pool, or UE 1 can use a pre-configured resource pool.

[0108] 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.

[0109] Hereinafter, resource allocation in SL will be described.

[0110] 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.

[0111] For example, Figure 10 (a) shows the UE operation related to LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, Figure 10 (a) 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.

[0112] For example, Figure 10 (b) shows the UE operation related to LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, Figure 10 (b) shows the UE operation related to NR resource allocation mode 2.

[0113] Reference Figure 10 (a) of the present invention, in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the BS may schedule SL resources to be used by the UE for SL transmission. For example, the BS may perform resource scheduling for UE 1 through the PDCCH (more specifically, downlink control information (DCI)), and UE 1 may perform V2X or SL communication with respect to UE 2 according to the resource scheduling. For example, UE 1 may transmit sidelink control information (SCI) to UE 2 through the physical sidelink control channel (PSCCH), and thereafter transmit data based on the SCI to UE 2 through the physical sidelink shared channel (PSSCH).

[0114] 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 resources configured by the BS / network or the SL transmission resources within 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.

[0115] Figure 11 Three types of casts based on embodiments 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) shows unicast type SL communication, and Figure 11 (c) shows multicast SL communication. In the case of unicast SL communication, the UE can perform one-to-one communication with another UE. In the case of multicast SL transmission, the UE can perform SL communication with one or more UEs in the group to which the UE belongs. In various embodiments of the present disclosure, SL groupcast communication can be replaced by SL multicast communication, SL one-to-many communication, etc.

[0116] On the other hand, in the case of side link (SL)-based communication and Uu link-based communication in which a carrier is shared and used in a time division duplex (TDD) method, the user equipment (UE) can use at least the uplink (UL) time slot as the SL time slot. Alternatively, the network can arbitrarily configure the SL time slot of the UE to minimize interference in the Uu link-based communication. Here, the Uu link-based communication can be the communication between the base station and the UE, and the SL link-based communication can be the communication between the UEs. For ease of description, the Uu link-based communication can be referred to as Uu communication, and the SL link-based communication can be referred to as SL communication. For example, the network can be a base station or a V2X server.

[0117] At this time, when the network pre-configures the SL time slot configuration information for the UE, the in-coverage (INC) UE and the out-of-coverage (OOC) UE can perform SL communication based on the same SL time slot configuration information. However, if the network reconfigures the SL time slot configuration information, the INC UE can receive the reconfigured SL time slot configuration information from the network, while the OOC UE out of coverage of the network may not receive the reconfigured SL time slot configuration information from the network. Therefore, the OOC UE cannot know the reconfigured SL time slot configuration information.

[0118] To solve this problem, the INC UE can send SL time slot configuration information to the OOC UE through the physical side link broadcast channel (PSBCH). Through this, the INC UE and the OOC UE can use the same SL time slot configuration information to perform SL communication. However, at this time, since the number of bits that the INC UE can send through the PSBCH affects the detection performance of the PSBCH, it may be preferable for the INCUE to send a limited number of bits of information through the PSBCH. According to various embodiments of the present disclosure, a method for sending information related to the SL time slot configuration using a limited number of bits in the PSBCH and a device supporting the same are proposed.

[0119] According to an embodiment of the present disclosure, first, the network can configure / determine the UL / downlink (DL) TDD configuration for Uu communication. Based on the UL / DL TDD configuration, the network can determine the resources to be allocated to the SL time slot from the resources allocated to the UL time slot. Through this, the network can configure / determine the SL time slot configuration. Alternatively, under the assumption that the network controls Uu communication to minimize interference, the network can allocate any time slot among the time slots configured by the UL / DL TDD configuration to SL communication.

[0120] The cell-specific TDD-UL-DL configuration configured by the network may include information related to the period and information related to the number of time slots. For example, the TDD-UL-DL configuration may be applied in the form of periodically repeating the same number of time slots. In this case, multiple periods may be configured for the UE, and an independent number of time slots may be applied to each period. Multiple time slots within a period may consist of a DL time slot-flexible (F) time slot-UL time slot, and the configuration may be referred to as a pattern. In this case, the F time slot may be allocated as a DL time slot or a UL time slot by a separate configuration.

[0121] Table 5 shows an example of TDD UL-DL-Configuration (TDD-UL-DL-ConfigCommon).

[0122] [Table 5]

[0123]

[0124]

[0125] Referring to Table 5, the information related to each pattern (TDD-UL-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 allocates as many DL resources as the number of DL slots configured by RRC signaling from the start time of each pattern, and then the base station may allocate as many DL resources as the number of DL symbols configured by RRC signaling from the first symbol of the next slot of the last DL slot in the pattern.

[0126] Figure 12 DL slots, DL symbols, UL slots, and UL symbols allocated within a DL / UL cycle according to an embodiment of the present disclosure are shown. Figure 12 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0127] Reference Figure 12 , for example, the base station allocates as many UL resources as the number of UL time slots configured by RRC signaling from the end point of each pattern, and then the base station may allocate as many UL resources as the number of UL symbols configured by RRC signaling from the last symbol of the time slot before the first UL time slot in the pattern. The above single or multiple patterns may be repeatedly applied in units of (total) periods. For example, a UE that receives a TDD-UL-DL configuration from a base station may know the DL resources and / or UL resources as follows: Figure 12 Assigned as shown.

[0128] According to an embodiment of the present disclosure, when the SL time slot is configured within the UL time slot in the TDD-UL-DL-configuration, the SL time slot can be configured as a continuous time slot from the end of the cycle within one cycle. For example, if the network can configure a total of 8 cycles within a maximum of 10ms, and according to the SCS between 15kHz and 120kHz, there can be a maximum of 80 time slots within one cycle, then according to the configuration of the UL time slot, the number of time slots allocated to the SL time slot can also be up to 80. Therefore, the SL TDD configuration sent by the UE through the PSBCH can be configured with a total of 10 bits, including 3 bits of period and 7 bits of pattern. At this time, the UE can expect the network to always apply only one TDD-UL-DL-configuration pattern to the Uu link carrier shared with the SL. For example, at this time, the UE can determine that the network always applies only one TDD-UL-DL-configuration pattern to the Uu link carrier shared with the SL.

[0129] According to an embodiment of the present disclosure, the network can configure two TDD-UL-DL configuration patterns for the UE. In this case, for the pattern, the total number of periods that can be combined according to the SCS can be 18, and 5 bits may be required to represent 18 types of periods. In addition, in order to signal the number of SL time slots for each pattern, 7 bits (a total of 14 bits) may be required. Therefore, for the SL TDD configuration sent via the PSBCH, a total of 19 bits may be required. However, in this case, the PSBCH signaling overhead becomes too large. To solve this problem, when the network configures two TDD-UL-DL-configuration patterns for the UE, the network may allocate all time slots of the second pattern as SL time slots and allocate the first pattern as UL / DL time slots. Therefore, the UE can signal only the number of SL time slots of the first pattern via the PSBCH, and allocate all time slots of the second pattern as SL time slots. In this case, 5 bits indicate the period of the first pattern and 7 bits indicate the number of SL time slots, and a total of 12 bits may be required to signal the SL TDD configuration. In this case, the INC UE can send a PSBCH including a 12-bit SL TDD configuration to the OOC UE.

[0130] According to an embodiment of the present disclosure, the network may configure two TDD-UL-DL configuration patterns for the UE. In this case, the two patterns may be regarded as one integrated period, and the SL slot may consist of consecutive slots from the end of the integrated period. In this case, since the two patterns are integrated, the bits used to indicate the number of SL slots (e.g., a maximum of 160) may be increased from 7 bits by 1 bit to 8 bits. Therefore, 5 bits for indicating the period and 8 bits for indicating the number of SL slots (a total of 13 bits) may be required to signal the SL TDD configuration. In this case, the INC UE may send a PSBCH including a 13-bit SL TDD configuration to the OOC UE.

[0131] According to an embodiment of the present disclosure, the network may configure two TDD-UL-DL configuration patterns for the UE. In this case, the two patterns may be regarded as one integrated period, and the SL slots may consist of consecutive slots from the end of the integrated period. In this case, the SL slots may always be allocated in units of two consecutive slot pairs. Therefore, the number of bits required for the UE to signal the number of slot pairs within the integrated period may be reduced to 7 bits. In this case, 5 bits for indicating the period and 7 bits for indicating the number of SL slots, a total of 12 bits, may be required to signal the SL TDD configuration. In this case, the INC UE may send a PSBCH including a 12-bit SLTDD configuration to the OOC UE. Alternatively, the network may configure or pre-configure information about how many consecutive slots to indicate the number of SL slots to the UE through higher layer signaling. For example, the higher layer signaling may be RRC signaling.

[0132] According to an embodiment of the present disclosure, the network can configure two TDD-UL-DL configuration patterns for the UE. In this case, if all possible periodicity combinations with the number of time slots are encoded according to the SCS, each case can be signaled using a total of 14 bits. In this case, if P is the total integrated periodicity, P1 is the periodicity of the first pattern, and P2 is the periodicity of the second pattern, all possible periodicity combinations can be represented as shown in Table 6.

[0133] [Table 6]

[0134] P 0.5 0.625 1 1.25 2 2.5 4 5 10 20 P1 0.5 0.625 1 1.25 2 2.5 5 10 P1+P2 0.5+0.5 0.625+0.625 1+1 1.25+1.25 2+2 2.5+2.5 5+5 10+10 P1+P2 2+0.5 P1+P2 0.5+2

[0135] For each of the above possible periods, when the SCS value is 15kHz, 30kHz, 60kHz and 120kHz, the number of possible SL time slots can be as shown in Tables 7 to 10.

[0136] [Table 7]

[0137] P 1 2 4 5 10 20 P1 1 2 5 10 P1+P2 1 4 25 100 P1+P2 P1+P2

[0138] Table 7 shows the case where the SCS value is 15 kHz.

[0139] [Table 8]

[0140] P 0.5 1 2 2.5 4 5 10 20 P1 1 2 4 5 10 20 P1+P2 1 4 16 25 100 400 P1+P2 4 P1+P2 4

[0141] Table 8 shows the case where the SCS value is 30 kHz.

[0142] [Table 9]

[0143] P 0.5 0.625 1 1.25 2 2.5 4 5 10 20 P1 4 5 8 10 16 20 40 80 P1+P2 16 25 64 100 256 400 1600 6400 P1+P2 64 P1+P2 64

[0144] Table 9 shows the case where the SCS value is 60 kHz.

[0145] [Table 10]

[0146] P 0.5 0.625 1 1.25 2 2.5 4 5 10 20 P1 4 5 8 10 16 20 40 80 P1+P2 16 25 64 100 256 400 1600 6400 P1+P2 64 P1+P2 64

[0147] Table 10 shows the case where the SCS value is 120 kHz.

[0148] Since all the possible SL time slots mentioned above are 12240, a total of 14 bits may be required to signal the SL TDD configuration. In this case, the INC UE may send a PSBCH including the 14-bit SL TDD configuration to the OOC UE.

[0149] According to an embodiment of the present disclosure, the SL slot may not be limited to only UL slots in the TDD-UL-DL configuration configured by the network. Alternatively, even if the SL slot is limited to the UL slot in the TDD-UL-DL configuration configured by the network, the SL slot is not always composed of consecutive slots from the end of one pattern, but the SL slot may be composed of consecutive slots from any starting position. In this case, the starting position of the slot and the number of consecutive slots can be represented by joint coding. And, since each pattern can have a maximum of 80 slots, a total of 80 slots can be represented by a total of 80 slots. bits to signal the number of time slots in a cycle. Therefore, 3 bits may be needed to indicate the cycle and 12 bits to indicate the number of SL time slots, for a total of 15 bits to signal the SL TDD configuration. In this case, the INC UE may send a PSBCH including a 15-bit SLTDD configuration to the OOC UE.

[0150] According to an embodiment of the present disclosure, the network can configure two TDD-UL-DL configuration patterns for the UE. In this case, the number of time slots in each pattern can be expressed in units of multiple consecutive time slots per SCS. For example, the number of time slots in each pattern can be expressed as follows.

[0151] 1) In the case of SCS=15kHz, the number of time slots in the pattern is expressed in units of one time slot.

[0152] 2) In the case of SCS=30 kHz, the number of slots in the pattern is expressed in units of two slots.

[0153] 3) In the case of SCS=60kHz, the number of time slots in the pattern is expressed in units of 4 time slots.

[0154] 4) In the case of SCS=120 kHz, the number of time slots in the pattern is expressed in units of 8 time slots.

[0155] In this case, the network may configure or preconfigure the UE through high-layer signaling information about whether to express the number of consecutive time slots for each SCS and the number of time slots of the signaling pattern. Alternatively, the network may configure or preconfigure the UE with one time slot unit for a specific SCS, and the time slot units for the remaining SCSs may be scaled proportionally with the size of the SCS. For example, in the case of the above embodiment, the network may configure or preconfigure the UE to express the number of time slots in units of one time slot for SCS=15kHz, and configure or preconfigure the UE to express the number of time slots in units of 2, 4 or 8 time slots for the remaining SCSs. For example, as described above, in addition to SCS=15kHz, expressing the number of time slots in units of 2, 4 or 8 time slots for the remaining SCSs may be using upward scaling. In this case, for example, when the number of UL time slots configured by the network is less than the time slot unit, the UE may not use the corresponding UL time slot as the SL time slot. Alternatively, when the number of UL slots configured by the network is less than the slot unit, the UE may consider / determine that the slot unit is one slot and use the corresponding UL slot as the SL slot.

[0156] In the present disclosure, even if the network configures two TDD-UL-DL configurations for the UE, a method and a device supporting the same are proposed in which the UE configures / sends the SL TDD configuration within the TDD-UL-DL configuration configured by the network by using a PSBCH SL TDD configuration with a limited number of bits (while minimizing the loss of SL configuration flexibility and SL time slot indication accuracy).

[0157] According to an embodiment of the present disclosure, the SL TDD configuration information transmitted through the PSBCH may be signaled using X+Y+Z bits. For example, a UE may transmit SLTDD configuration information consisting of X+Y+Z bits to a neighboring UE through the PSBCH. In this case, X represents the number of SLTDD setting patterns, Y represents the period in which the SL TDD configuration pattern is applied and repeated, and Z represents the number of SL time slots for the SL TDD configuration pattern configured by X and Y. In this case, when two SLTDD configuration patterns are configured by X, Z may independently represent the number of SL time slots for each pattern.

[0158] According to an embodiment of the present disclosure, when configuring an SL TDD configuration pattern, the repetition period of the SL TDD pattern may be as shown in Table 11.

[0159] [Table 11]

[0160] Period (ms) 0.5 0.625 1 1.25 2 2.5 4 5 10

[0161] Table 11 shows the period of one SLTDD configuration pattern.

[0162] For example, when two SLTDD configuration patterns are configured, the period of the SLTDD patterns may be as shown in Table 12. In the embodiment of Table 12, P1 is the period of the first SLTDD configuration pattern, P2 is the period of the second SLTDD configuration pattern, and Total_P represents the sum of P1 and P2. In addition, the two SLTDD configuration patterns may be repeated with a period of Total_P (= P1 + P2).

[0163] [Table 12]

[0164] P1(ms) 0.5 0.625 1 0.5 2 1.25 1 3 2 1 4 2 3 2.5 5 10 P2(ms) 0.5 0.625 1 2 0.5 1.25 3 1 2 4 1 3 2 2.5 5 10 Total_P 1 1.25 2 2.5 2.5 2.5 4 4 4 5 5 5 5 5 10 20

[0165] Table 12 shows the periods of two SLTDD configuration patterns.

[0166] Therefore, to represent all nine periods shown in Table 11 and the 16 periods shown in Table 12, a total of 5 bits may be required, where X=1 bit and Y=4 bits.

[0167] According to an embodiment of the present disclosure, when X=0, the UE may represent the number of SL slots used for one SL TDD configuration pattern as a Z value. For example, the UE may represent the number of consecutive SL slots from the end of the period of the SL TDD configuration pattern as a Z value. According to each SL TDD configuration pattern period, the number of possible SL slots (i.e., NumStates) may be defined as shown in Table 13 below.

[0168] [Table 13]

[0169]

[0170] Table 13 shows the number of SL slots according to the period of the SL TDD configuration pattern. For example, when X=1, the UE can represent the number of SL slots for two SL TDD configuration patterns as a Z value. For example, the UE can represent the number of consecutive SL slots from the end of the period of each SL TDD configuration pattern as a Z value. According to each SL TDD configuration pattern period, the number of all possible combinations of the number of SL slots (i.e., NumStates) can be defined as shown in Table 14 below.

[0171] [Table 14]

[0172]

[0173] Table 14 shows the number of cases of combinations of the number of SL time slots according to the periods of two SL TDD configuration patterns. For example, in order to be able to express all the numbers of SL time slots according to each period of the SL TDD configuration pattern, the number of cases of combinations of the number of SL time slots according to the periods of the SL TDD configuration pattern of Table 14 may need to be expressed by 7 bits. In Table 14, the number of cases marked with * is a value of 128 or more, which cannot be expressed by 7 bits. Therefore, for example, in order to allow the Z value to be expressed by 7 bits, the number of SL time slots in the case where * is not marked in Table 14 is expressed as a Z value as it is, and the number of SL time slots in the case of * can be expressed as a Z value by grouping multiple SL time slots into one unit.

[0174] For example, if the number of cases of combinations of the number of units for each pattern when a plurality of time slots are represented as one unit is represented by 7 bits, the number of cases of combinations of the number of units can be 0 to 127. For example, the number of cases of combinations marked with * cannot be represented by 7 bits as described above, for example, when two time slots are represented as one unit, the number of cases of combinations of the number of units for each pattern can be represented by 7 bits. For example, representing two time slots as one unit can represent the number of cases based on a value related to granularity (here, for example, 2). For example, the number of cases of combinations marked with ** cannot be represented by 7 bits, for example, when 4 time slots are represented as one unit, the number of cases of combinations of the number of units for each pattern can be represented by 7 bits. For example, representing 4 time slots as one can represent the number of cases based on a value related to granularity (here, for example, 4). For example, the number of cases of combinations marked with *** cannot be represented by 7 bits, for example, when 8 time slots are represented as one unit, the number of cases of combinations of the number of units for each pattern can be represented by 7 bits. For example, expressing eight time slots as one may represent a number of cases based on a value associated with the granularity (here, for example, 8).

[0175] According to an embodiment of the present disclosure, as a method for expressing the number of all SL time slots as a Z value of a finite number of bits, the number of SL time slots that can be adaptively expressed as one unit can be adjusted according to the period value and the SCS value of the SL TDD configuration pattern. That is, according to the period value and the SCS value of the SL TDD configuration pattern, for a range that can be expressed by the number of bits allocated to the Z value, the UE can count the number of possible SL time slots according to the SCS used. For cases exceeding the range that can be expressed by the number of bits allocated to the Z value, the UE can count the number of multiple SL time slots as one virtual SL time slot by adjusting the reference SCS. For example, the reference SCS can be an SCS related to the size of the virtual SL time slot.

[0176] For example, when Z=7 bits, the values corresponding to SCS=120kHz in Table 14 are marked with * For the combination of the number of SL slots, the UE can configure the reference SCS used to count the number of SL slots to 60kHz. In this case, the UE can actually count two SL slots as one virtual SCS = 60kHz SL slot. In most of the values in Table 14, for the values marked with * The same rule applies to combinations of the number of SL slots indicated by **, and the UE can express the Z value by using the SCS corresponding to 1 / 2 of the actually used SCS as the reference SCS. That is, the UE can count two SL slots as one virtual SL slot. Here, for example, the value related to the granularity can be 2. For example, for the combination of the number of SL slots indicated by **, the UE can express the Z value by using the SCS corresponding to 1 / 4 of the actually used SCS as the reference SCS. That is, the UE can count 4 SL slots as one virtual SL slot. Here, for example, the value related to the granularity can be 4. For example, for the combination of the number of SL slots indicated by ***, the UE can express the Z value by using the SCS corresponding to 1 / 8 of the actually used SCS as the reference SCS. That is, the UE can count 8 SL slots as one virtual SL slot. Here, for example, the value related to the granularity can be 8.

[0177] [Table 15]

[0178]

[0179] Table 15 shows values associated with the period of each pattern and the granularity according to the SCS. Referring to Table 15, the number of SL time slots for each pattern can be expressed as a unit of a plurality of time slots. For example, the number of SL time slots for each pattern can be expressed in units of time slots associated with the SCS obtained by dividing the SCS value associated with the SL time slot by the value w associated with the granularity. For example, when the period of the first pattern is 5 ms and the period of the second pattern is 1 ms, the number of SL time slots of the first pattern and the second pattern associated with the SCS of 120 kHz can be expressed in units of time slots associated with the SCS of 60 kHz by dividing 120 kHz by w=2. For example, when the period of the first pattern is 10 ms and the period of the second pattern is 10 ms, the number of SL time slots of the first pattern and the second pattern associated with the SCS of 60 kHz can be expressed in units of time slots associated with the SCS of 15 kHz by dividing 60 kHz by w=4.

[0180] Alternatively, for example, the number of SL time slots for each pattern can be expressed as a new unit in which the number of time slots as many as the value w associated with the granularity is expressed as one. For example, when the period of the first pattern is 5 ms and the period of the second pattern is 1 ms, the number of SL time slots of the first pattern and the second pattern associated with the SCS of 120 kHz can be expressed as a new unit in which w=2 SL time slots are expressed as one. For example, when the period of the first pattern is 10 ms and the period of the second pattern is 10 ms, the number of SL time slots of the first pattern and the second pattern associated with the SCS of 60 kHz can be expressed as a new unit in which w=4 SL time slots are expressed as one.

[0181] According to an embodiment of the present disclosure, the number of SL slots for each pattern may be included in the PSBCH based on Equation 1.

[0182] [Formula 1]

[0183]

[0184] Refer to formula 1, u SL slots Indicates the number of SL slots used for each pattern. slots represents the number of SL slots used for the first pattern, and u slots,2 represents the number of SL slots used for the second pattern. That is, the number of SL slots used for two patterns can be expressed as u SL slots .u sym Indicates the number of SL symbols of the first pattern, bq u sym,2 represents the number of SL symbols of the second pattern. μ represents a value related to the SCS using the SL slot.ref represents the value relative to the reference SCS. w represents the value related to the granularity. I1 and I2 respectively represent whether the number of SL symbols of the first pattern and the number of SL symbols of the second pattern affect u slots and u slots,2 The value of the correlation. L represents the maximum number of symbols in a time slot. P represents the period of the first pattern (ms).

[0185] Figure 13 SL slots included in a period of one pattern according to SL TDD 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.

[0186] Reference Figure 13 , the number of SL slots to be transmitted through the PSBCH may be the number of SL slots transmitted at the SCS of 120 kHz. For example, the number of SL slots may be included in the information related to the number of SL slots of each of the two patterns configured according to the SL TDD and transmitted through the PSBCH. For example, the information related to the number of SL slots in each of the two patterns may include a value related to the number of SL slots in each of the two patterns. For example, Figure 13 (a) to (d) may represent the period of the first pattern according to the SL TDD configuration. Figure 13 In (a), the number of SL slots in the first pattern transmitted at an SCS of 120 kHz may be n. In this case, the value associated with the number of SL slots in the first pattern may be n. For example, Figure 13 (b) of FIG. 1 may represent a case where the value (w) associated with the granularity based on the period of two patterns configured according to the SCS (for example, here, 120 kHz) and SL TDD related to SL communication is 2. Here, the number of SL slots of the first pattern is n, but the SL slots of 120 kHz / w=60 kHz may be counted in new units. That is, the value associated with the number of SL slots of the first pattern may be a value of an integer part of n / 2. For example, Figure 13 (c) may represent a case where the value associated with the granularity is 4 based on the period of two patterns configured according to the SCS (for example, here, 120 kHz) and SL TDD related to SL communication. Here, the number of SL slots of the first pattern is n, but the SL slots of 120 kHz / w=30 kHz may be counted in a new unit. That is, the value associated with the number of SL slots of the first pattern may be a value of an integer part of n / 4. For example, Figure 13(d) may represent a case where the value associated with the granularity is 8 based on the period of two patterns configured according to the SCS (for example, 120 kHz in this case) and SL TDD related to SL communication. Here, the number of SL slots of the first pattern is n, but the SL slots of 120 kHz / w = 15 kHz can be counted in new units. That is, the value associated with the number of SL slots of the first pattern may be a value of the integer part of n / 8.

[0187] Figure 14 A process for a TX UE to transmit a PSBCH to an RX 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.

[0188] Reference Figure 14 In step S1410, the base station may send TDD-UL-DL configuration information to the TX UE. For example, the TDD-UL-DL configuration information may include information related to multiple UL TDD patterns. The information related to the UL TDD pattern may include at least one of information related to the UL time slot, information related to the UL symbol, and / or information related to the period of the UL TDD pattern. In step S1420, the TX UE may obtain the number of SL time slots of each of the multiple UL TDD patterns related to SL communication based on the information related to the multiple UL TDD patterns and the SCS related to SL communication. In step S1430, the TX UE may send a PSBCH to the RX UE. For example, the PSBCH may include information related to the number of SL time slots of each of the multiple UL TDD patterns. For example, the information related to the number of SL time slots in each of the multiple UL TDD patterns may include a value related to the number of SL time slots in each of the multiple UL TDD patterns. For example, the value related to the number of SL time slots in each of the multiple UL TDD patterns may include the number of time slots counted in units of time slots associated with an SCS that is equal to or lower than the SCS associated with SL communication. For example, the SCS that is equal to or lower than the SCS associated with SL communication may be a number obtained by dividing the SCS associated with SL communication by a power of 2. For example, the power of 2 may be a value related to granularity. For example, the value related to granularity may be determined based on the multiple UL TDD patterns and the period of each SCS associated with SL communication. In step S1440, the RX UE may obtain the number of SL time slots for each of the multiple UL TDD patterns based on the value related to the number of SL time slots, the SCS associated with SL communication, and the period of each UL TDD pattern. For example, the RX UE may obtain the number of SL time slots for each of the multiple UL TDD patterns based on the value related to granularity.

[0189] According to an embodiment of the present disclosure, as a method of expressing the number of all SL time slots using a Z value having a limited number of bits according to an SCS value, a period value of an SL TDD configuration pattern, and the actual configured number of SL time slots, the number of SL time slots that can be adaptively expressed as one unit can be adjusted. That is, according to the SCS value and the period value of the SL TDD configuration pattern, for a range that can be expressed by the number of bits allocated to the Z value, the UE can count the number of actual SL time slots according to the used SCS, and when it exceeds the range that can be expressed by the number of bits allocated to the Z value, the UE can count the number of multiple SL time slots as one virtual SL time slot by adjusting the reference SCS.

[0190] For example, when Z=7 bits, for the combination of the number of SL time slots indicated by * among the values corresponding to SCS=120kHz in Table 14, when the number of SL time slots is 0 to 127, the UE can count the number of SL time slots as the number of actually configured SL time slots. On the other hand, when the number of SL time slots exceeds 127, the UE can configure the reference SCS for counting the number of SL time slots to 60kHz. In this case, the UE can actually count two SL time slots as one virtual SCS=60kHz SL time slot. The same rule applies, for the combination of the number of SL time slots marked with * among the values in Table 14, if the number of SL time slots is 0 to 127, the UE can count the number of SL time slots as the number of actually configured SL time slots, and when the number of SL time slots exceeds 127, the UE can express the Z value by using an SCS corresponding to 1 / 2 of the actually used SCS as the reference SCS. That is, the UE can count two SL time slots as one virtual SL time slot. For example, for the combination of the number of SL time slots marked with **, if the number of SL time slots is 0 to 127, the UE may count the number of SL time slots as the number of actually configured SL time slots, and when the number of SL time slots exceeds 127, the UE may express the Z value by using an SCS corresponding to 1 / 4 of the actually used SCS as a reference SCS. That is, the UE may count four SL time slots as one virtual SL time slot. For example, for the combination of the number of SL time slots indicated by ***, if the number of SL time slots is 0 to 127, the UE may count the number of SL time slots as the number of actually configured SL time slots, and when the number of SL time slots exceeds 127, the UE may express the Z value by using an SCS corresponding to 1 / 8 of the actually used SCS as a reference SCS. That is, the UE may count 8 SL time slots as one virtual SL time slot.

[0191] According to an embodiment of the present disclosure, as described above, when the UE adjusts the reference SCS so that the number of virtual SL slots is within the range of values that can be represented by Z bits, the UE can configure an independent reference SCS for each of the two SL TDD configuration patterns. For example, when SCS = 120 kHz and P1 = 1, P2 = 3, Total_P = 4, the number of all combinations of the number of SL slots can be 225. Therefore, when Z = 7 bits, the range that can be represented by the number of bits allocated to the Z value can be exceeded. In this case, if the UE configures all reference SCSs for both SL TDD configuration patterns to 60 kHz, the number of all combinations of the number of SL slots becomes 65, making it possible to represent Z = 7 bits. However, even if the UE configures the reference SCS to 60 kHz only for the first pattern and the UE uses the original 120 kHz as the reference SCS for the second pattern, the number of all combinations of the number of SL slots can be 125. That is, the UE can still represent the number of all combinations of the number of SL slots with a 7-bit Z value while minimizing the loss of clarity in the representation of the number of SL slots due to the reference SCS adjustment.

[0192] According to an embodiment of the present disclosure, the UE may represent the period (Period) of one SL TDD configuration pattern in Table 11 as the sum (Total_P) of all periods of two SL TDD configuration patterns in Table 12. However, when the period is 0.5 and 0.625, the Total_P value cannot be represented, so in this case, for two SL TDD configuration patterns, the same SL TDD pattern with the same period may be represented in the form of two repetitions. For example, when the period of one SL TDD configuration pattern is 0.5, the UE may represent the period of the two SL TDD configuration patterns (e.g., P1=0.5, P2=0.5, Total_P=1). For example, when the period of one SL TDD configuration pattern is 0.625, the UE may represent the period of the two SL TDD configuration patterns (e.g., P1=0.625, P2=0.625, Total_P=1.25). By representing in this manner, the UE may represent the periods shown in Tables 11 and 12 using a total of 4 bits (i.e., X=0 bit, Y=4 bits). Therefore, the signaling overhead for PSBCH transmission can be reduced.For example, according to the method described above through Table 14, the UE can indicate both one SL TDD configuration pattern and two SL TDD configuration patterns.

[0193] According to an embodiment of the present disclosure, the number of bits X, Y, and Z may be predefined in the UE. For example, the base station or network may configure or preconfigure the number of bits X, Y, and Z to the UE via higher layer signaling such as RRC signaling. For example, the base station or network may signal the number of bits X, Y, and Z to the UE via a MAC control element (CE), DCI, or the like.

[0194] According to an embodiment of the present disclosure, whether to use two SL TDD configuration patterns to represent one SL TDD configuration pattern may be predefined in the UE. For example, the base station or the network may configure or preconfigure to the UE whether to represent one SL TDD configuration pattern as two SL TDD configuration patterns through higher layer signaling such as RRC signaling. For example, the base station or the network may configure or preconfigure to the UE whether to represent one SL TDD configuration pattern as two SL TDD configuration patterns through MAC CE, DCI, etc.

[0195] According to an embodiment of the present disclosure, for two SL TDD configuration patterns, combinations outside the representation range of Z bits may be predefined in the UE. For example, the base station or the network may configure or preconfigure the combinations outside the representation range of Z bits for the two SL TDD configuration patterns to the UE through higher layer signaling such as RRC signaling. For example, the base station or the network may configure or preconfigure the combinations outside the representation range of Z bits for the two SL TDD configuration patterns to the UE through MAC CE, DCI, etc.

[0196] According to an embodiment of the present disclosure, for two SL TDD configuration patterns, the following can be predefined in the UE: the number of SL TDD configuration patterns to be applied differently from the SCS actually used, the period of the SL TDD configuration pattern, the number of SL time slots, and the reference SCS to be applied in this case (hereinafter, the first information). For example, the base station or the network can configure or preconfigure the first information to the UE through high-layer signaling such as RRC signaling. For example, the base station or the network can configure or preconfigure the first information to the UE through MAC CE, DCI, etc. At this time, the reference SCS to be applied to the two TDD UL configuration patterns can be applied equally to the two TDD UL configuration patterns, or the reference SCS for each of the two TDD UL configuration patterns can be independently predefined, or the "base station or network" can configure or preconfigure the UE through high-layer signaling such as RRC signaling, or the "base station or network" can signal the UE through MAC CE, DCI, etc.

[0197] According to various embodiments of the present disclosure, an efficient method for configuring SL time slots for TDD-UL-DL-configurations configured by the network through a PSBCH with a limited number of bits has been proposed. According to the proposed embodiment, when the network configures two TDD-UL-DL configurations for the UE, the UE can use the minimum bits to signal SL-related resources through the PSBCH, and the sharpness of the number of time slots to be used for SL can be increased as much as possible. In addition, by representing one SL TDD configuration pattern with two SL TDD configuration patterns, the signaling overhead can be reduced. In addition, according to the SCS value, the period value of the SL TDD configuration pattern and / or the number of actually configured SL time slots, the UE can adaptively adjust the reference SCS value as a reference for counting the number of SL time slots. Therefore, the UE counts multiple SL time slots as one virtual SL time slot, so that the signaling overhead representing the period of the SL TDD configuration pattern can be reduced.

[0198] Figure 15 A process of transmitting a PSBCH by a first device according to an embodiment of the present disclosure is shown. Figure 15 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0199] Reference Figure 15 In step S1510, the first device may receive time division duplex-uplink-downlink (TDD-UL-DL) configuration information from a base station, the configuration information including information related to a first slot pattern and information related to a second slot pattern. For example, the information related to the first slot pattern may include information related to a period of the first slot pattern and information related to a first UL resource, and the information related to the second slot pattern may include information related to a period of the second slot pattern and information related to a second UL resource. In step S1520, the first device may obtain the number of first side link (SL) slots related to the first slot pattern and the number of second SL slots related to the second slot pattern based on a first subcarrier spacing (SCS) related to SL communication and the TDD-UL-DL configuration information. In step S1530, the first device may send a physical side link broadcast channel (PSBCH) including information related to the number of first SL slots and information related to the number of second SL slots to the second device. For example, based on i) information related to the period of the first time slot pattern, ii) information related to the period of the second time slot pattern, and iii) the first SCS, the number of first SL time slots and the number of second SL time slots can be expressed based on counting multiple time slots as one unit, and SL communication can be performed based on the number of first SL time slots and the number of second SL time slots.

[0200] For example, a unit for counting multiple time slots as one may be a unit for counting time slots associated with a second SCS lower than a first SCS as one.

[0201] For example, the second SCS may be an SCS obtained by dividing the first SCS by a number that is a power of 2.

[0202] For example, a number that is a power of 2 may be a value related to the granularity of the time slots.

[0203] For example, based on the fact that the sum of the period of the first time slot pattern and the period of the second time slot pattern is 4 ms and the first SCS is 120 kHz, the number of powers of 2 may be 2.

[0204] For example, based on the fact that the sum of the period of the first time slot pattern and the period of the second time slot pattern is 5 ms and the first SCS is 120 kHz, the number of powers of 2 may be 2.

[0205] For example, based on the period of the first time slot pattern being 5 ms, the period of the second time slot pattern being 5 ms, and the first SCS being 60 kHz, the number of powers of 2 may be 2.

[0206] For example, based on the period of the first time slot pattern being 10 ms, the period of the second time slot pattern being 10 ms, and the first SCS being 30 kHz, the number of powers of 2 may be 2.

[0207] For example, based on the period of the first time slot pattern being 5 ms, the period of the second time slot pattern being 5 ms, and the first SCS being 120 kHz, the number of powers of 2 may be 4.

[0208] For example, based on the period of the first time slot pattern being 10 ms, the period of the second time slot pattern being 10 ms, and the first SCS being 60 kHz, the number of powers of 2 may be 4.

[0209] For example, based on the period of the first time slot pattern being 10 ms, the period of the second time slot pattern being 10 ms, and the first SCS being 120 kHz, the number of powers of 2 may be 8.

[0210] For example, the first UL resource may include at least one of a first UL slot or a first UL symbol, and the second UL resource may include at least one of a second UL slot or a second UL symbol.

[0211] For example, the first UL resource may be used as a first SL slot, and the second UL resource may be used as a second SL slot.

[0212] The above-mentioned embodiments can be applied to various devices to be described below. For example, the processor 102 of the first device 100 can control the transceiver 106 to receive time division duplex-uplink-downlink (TDD-UL-DL) configuration information from the base station, and the configuration information includes information related to the first time slot pattern and information related to the second time slot pattern. In addition, the processor 102 of the first device 100 can obtain the number of first side link (SL) time slots related to the first time slot pattern and the number of second SL time slots related to the second time slot pattern based on the first subcarrier spacing (SCS) related to SL communication and the TDD-UL-DL configuration information. In addition, the processor 102 of the first device 100 can control the transceiver 106 to send a physical side link broadcast channel (PSBCH) including information related to the number of first SL time slots and information related to the number of second SL time slots to the second device 200.

[0213] According to an embodiment of the present disclosure, a first device for performing wireless communication may be proposed. 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 instructions to: receive time division duplex-uplink-downlink (TDD-UL-DL) configuration information from a base station, the configuration information including information related to a first time slot pattern and information related to a second time slot pattern, wherein the information related to the first time slot pattern may include information related to a period of the first time slot pattern and information related to a first UL resource, and wherein the information related to the second time slot pattern may include information related to a period of the second time slot pattern and information related to a second UL resource; based on a first subcarrier spacing (SCS) related to SL communication and the TDD-UL-DL configuration information, obtain information related to the first time slot pattern; and transmitting a physical side link broadcast channel (PSBCH) including information related to the number of first SL time slots and information related to the number of second SL time slots to a second device, wherein the number of first SL time slots and the number of second SL time slots are represented on the basis of counting a plurality of time slots as one based on i) information related to the period of the first time slot pattern, ii) information related to the period of the second time slot pattern, and iii) the first SCS, and wherein SL communication can be performed based on the number of first SL time slots and the number of second SL time slots.

[0214] According to an embodiment of the present disclosure, a device configured to control a first user equipment (UE) may be proposed. For example, the device may include: one or more processors; and one or more memories operably connectable to the one or more processors and storing instructions. For example, the one or more processors may execute instructions to: receive time division duplex-uplink-downlink (TDD-UL-DL) configuration information from a base station, the configuration information including information related to a first time slot pattern and information related to a second time slot pattern, wherein the information related to the first time slot pattern may include information related to a period of the first time slot pattern and information related to a first UL resource, and wherein the information related to the second time slot pattern may include information related to a period of the second time slot pattern and information related to a second UL resource; based on a first subcarrier spacing (SCS) related to SL communication and the TDD-UL-DL configuration information, obtain information related to the first time slot pattern; and transmitting a physical side link broadcast channel (PSBCH) including information related to the number of first SL time slots and information related to the number of second SL time slots to a second UE, wherein the number of first SL time slots and the number of second SL time slots are represented on the basis of counting a plurality of time slots as one based on i) information related to the period of the first time slot pattern, ii) information related to the period of the second time slot pattern, and iii) the first SCS, and wherein SL communication can be performed based on the number of first SL time slots and the number of second SL time slots.

[0215] According to an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be proposed. For example, when the instructions are executed, a first device may: receive time division duplex-uplink-downlink (TDD-UL-DL) configuration information from a base station, the configuration information including information related to a first time slot pattern and information related to a second time slot pattern, wherein the information related to the first time slot pattern may include information related to a period of the first time slot pattern and information related to a first UL resource, and wherein the information related to the second time slot pattern may include information related to a period of the second time slot pattern and information related to a second UL resource; based on a first subcarrier spacing (SCS) related to SL communication and the TDD-UL-DL configuration information, obtain information related to the first time slot pattern; The number of related first side link (SL) time slots and the number of second SL time slots related to the second time slot pattern; and a physical side link broadcast channel (PSBCH) including information related to the number of first SL time slots and information related to the number of second SL time slots is sent to the second device, wherein the number of first SL time slots and the number of second SL time slots are expressed on the basis of counting multiple time slots as one based on i) information related to the period of the first time slot pattern, ii) information related to the period of the second time slot pattern, and iii) the first SCS, and wherein SL communication can be performed based on the number of first SL time slots and the number of second SL time slots.

[0216] Figure 16 A process of performing SL communication by a second device according to an embodiment of the present disclosure is shown. Figure 16 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0217] Reference Figure 16In step S1610, the second device may receive a physical side link broadcast channel (PSBCH) from the first device, the physical side link broadcast channel including information related to the period of the first slot pattern, information related to the period of the second slot pattern, information related to the number of first side link (SL) slots related to the first slot pattern, and information related to the number of second SL slots related to the second slot pattern. In step S1620, the second device may obtain the number of first SL slots and the number of second SL slots from the information related to the number of first SL slots and the information related to the number of second SL slots based on i) the information related to the period of the first slot pattern, ii) the information related to the period of the second slot pattern, and iii) the first subcarrier spacing (SCS) related to SL communication. In step S1630, the second device may perform SL communication based on the number of first SL slots and the number of second SL slots. For example, the information related to the number of first SL slots and the information related to the number of second SL slots may be expressed based on a unit in which a plurality of slots are counted as one.

[0218] For example, a unit in which a plurality of time slots are counted as one may be a unit in which a time slot associated with a second SCS lower than the first SCS is counted as one, and the second SCS may be an SCS the number of which is a power of 2 divided from the first SCS.

[0219] The above-mentioned embodiments can be applied to various devices to be described below. For example, the processor 202 of the second device 200 can control the transceiver 206 to receive a physical side link broadcast channel (PSBCH) from the first device, and the physical side link broadcast channel (PSBCH) includes information related to the period of the first time slot pattern, information related to the period of the second time slot pattern, information related to the number of first side link (SL) time slots related to the first time slot pattern, and information related to the number of second SL time slots related to the second time slot pattern. In addition, the processor 202 of the second device 200 can obtain the number of first SL time slots and the number of second SL time slots from the information related to the number of first SL time slots and the information related to the number of second SL time slots based on i) information related to the period of the first time slot pattern, ii) information related to the period of the second time slot pattern, and iii) a first subcarrier spacing (SCS) related to SL communication. In addition, the processor 202 of the second device 200 can perform SL communication based on the number of first SL time slots and the number of second SL time slots.

[0220] According to an embodiment of the present disclosure, a second device for performing wireless communication may be provided. For example, the second device may include: one or more memories storing instructions; one or more transceivers; and one or more processors connected to the one or more memories and the one or more transceivers. For example, one or more processors may execute instructions to: receive a physical side link broadcast channel (PSBCH) from a first device, the physical side link broadcast channel (PSBCH) including information related to a period of a first slot pattern, information related to a period of a second slot pattern, information related to the number of first side link (SL) slots related to the first slot pattern, and information related to the number of second SL slots related to the second slot pattern; obtain the number of first SL slots and the number of second SL slots from the information related to the number of first SL slots and the information related to the number of second SL slots based on i) information related to the period of the first slot pattern, ii) information related to the period of the second slot pattern, and iii) a first subcarrier spacing (SCS) related to SL communication; and perform SL communication based on the number of first SL slots and the number of second SL slots, wherein the information related to the number of first SL slots and the information related to the number of second SL slots are expressed based on a unit of counting multiple slots as one.

[0221] For example, the unit for counting multiple time slots as one may be a unit for counting time slots associated with a second SCS lower than the first SCS as one, and the second SCS may be an SCS the number of which is a power of 2 divided from the first SCS.

[0222] When some NR networks begin to expand at the same time as existing LTE networks are widely expanded, it may be necessary to control LTE UEs through the technologically advanced NR network. In this case, since the timing used by the NR network and the timing used by the LTE network are different, when performing LTE SL operation control and resource scheduling through the NR Uu link, there may be ambiguity when the UE determines the SL transmission resources, and thus there may be failures in communication between SL UEs.

[0223] In the present disclosure, when the NR Uu connection controls the LTE SL operation and schedules transmission resources, a method is proposed for smooth SL communication by removing ambiguity and allowing all UEs to understand the SL transmission resources equally.

[0224] For example, the UE may have both an NR module capable of performing communication based on an NR Uu connection and an SL module capable of performing communication based on LTE SL. In this case, after the NR module of the UE receives the NR SL DCI sent by the NR base station through the DL PDCCH, after the NR module decodes the NR SL DCI and recovers the sent content, when the NR module converts the recovered content into LTE SL DCI and sends it to the LTE module, the LTE module can determine the LTE SL transmission resources. In this article, for example, communication based on the NR Uu connection may include communication between the UE (e.g., the NR module of the UE) and the NR base station (e.g., gNB). For example, communication based on the LTE Uu connection may include communication between the UE (e.g., the LTE module of the UE) and the LTE base station (e.g., eNB).

[0225] For the above operations, the information sent via the NR SL DCI may include: the time X ms required for the UE's NR module to receive the NR SL DCI, decode the NR SL DCI, and complete the conversion to the LTE SL DCI, and the LTE SL DCI information is sent by the existing LTE base station to the LTE SL UE. In this case, when the LTE SL DCI is received as the first SL transmission resource, the existing LTE UE can select the SL resource on the LTE SL resource pool, which exists at the earliest point after (4+M) ms from the time when the LTE SL DCI is received as the first SL transmission resource. Therefore, the LTE SL DCI information may include a timing offset value of M ms value.

[0226] As a result, the NR SL DCI may include two timing offset values: an X ms value required for processing by the NR module and an M ms value required for processing by the LTE module. At this time, the NR base station may expect the UE to use the SL resources on the LTE SL resource pool that exist at the earliest point after (X+4+M) ms after the time of receiving the NR SL DCI as the first LTE SL transmission resource.

[0227] At this point, since the actual methods of implementing the NR module and the LTE module and the timing according to the clock used by each module can be different from each other, depending on the NR and LTE module implementation methods, there may be the following ambiguity: the timing used for LTE SL transmission resources may be interpreted differently between UEs, which is different from what the NR base station intends.

[0228] In order to solve this problem, the following operation may be proposed. According to an embodiment of the present disclosure, after the NR module of the UE receives and decodes the NR SL DCI from the base station, the NR module of the UE may convert the NR SL DCI into an LTE SL DCI. In addition, at a time point exactly X ms after receiving the NR SL DCI, the NR module of the UE may deliver the converted LTE SL DCI to the LTE module. For example, in this case, the LTE module may perform the same operation as when receiving the LTE SL DCI through the existing LTE Uu link. That is, the LTE module may regard / determine the time when the LTE SL DCI is received from the NR module as the time when the LTE SL DCI is received through the LTE Uu connection, and the UE may then operate in the same manner as the existing LTE modem. Therefore, even if the base station schedules LTE SL operation control and transmission resources through the NR Uu connection, it has the following advantage: it can be used without modification costs for the existing legacy LTE module. At this time, for example, the LTE module may regard / determine the time when the LTE SL DCI is received from the NR module as T DL , will be The SL resources on the LTE SL resource pool existing at the earliest time point thereafter are used as the first LTE SL transmission resources. The value may be a value obtained by dividing the timing advance value by 2, and the value may be proportional to the distance between the NR base station and the UE.

[0229] According to an embodiment of the present disclosure, after the NR module of the UE receives and decodes the NR SL DCI, the NR module of the UE may convert the NR SL DCI into an LTE SL DCI. In addition, at a time point exactly X ms after receiving the NR SL DCI, the NR module of the UE may deliver the converted LTE SL DCI to the LTE module at the start time of the nearest LTE SL subframe. For example, even in this case, the LTE module may perform the same operation as when the LTE SL DCI is received through the existing LTE Uu connection. That is, the LTE module may regard / determine the time when the LTE SL DCI is received from the NR module as the time when the LTE SL DCI is received through the LTE Uu connection, and the UE may then operate in the same manner as the existing LTE modem. Therefore, even if the base station schedules LTE SL operation control and transmission resources through the NR Uu connection, it has the advantage of being able to use the existing legacy LTE module without modification cost. At this time, for example, the LTE module may regard / determine the time when the LTE SL DCI is received from the NR module as T DL , will be The SL resource on the LTE SL resource pool existing at the earliest time point thereafter is used as the first LTE SL transmission resource. In this case, The value may be a value obtained by dividing the timing advance value by 2, and the value may be proportional to the distance between the NR base station and the UE.

[0230] After the NR module of the UE receives and decodes the NR SL DCI from the base station, the NR module of the UE can convert the NR SL DCI into LTE SL DCI. In addition, the NR module of the UE can directly deliver the converted LTE SL DCI to the LTE module. For example, in this case, so that the first LTE SL transmission resource can be determined based on the (X+4+M)ms timing offset value expected by the NR base station, together with the LTE SL DCI, the time when the NR module receives the NR SL DCI and the timing offset value of the X ms value included in the NR SL DCI can be sent to the LTE module. The LTE module cannot perform the same operation as when receiving the LTE SL DCI through the existing LTE Uu connection. The LTE module may need to determine the LTE SL transmission resource expected by the NR base station based on the timing offset information received from the NR module. At this time, for example, if the NR SL DCI reception time received by the LTE module is T DCI , and if the timing offset value required for the NR module indicated by the NR SL DCI field to receive and decode the NR SL DCI and then convert it to LTE SL DCI is X ms, the LTE module can The SL resources on the LTE SL resource pool that exist at the earliest point thereafter are used as the first LTE SL transmission resources. The value may be a value obtained by dividing the timing advance value by 2, and the value may be proportional to the distance between the NR base station and the UE. For example, in the above method, regardless of problems such as implementation methods of the NR module and the LTE module or timing differences caused by using different clocks, it has the advantage of being able to determine LTE SL transmission resources according to the timing intended by the NR base station.

[0231] For example, after the UE determines the initial LTE SL transmission resources, the UE may use the period value configured through higher-layer signaling to determine, based on logical subframes belonging to the LTE SL resource pool, periodic LTE SL transmission resources that are spaced apart from the initial LTE SL transmission resources by an interval equal to the period value. For example, the higher-layer signaling may be RRC signaling.

[0232] In this case, for example, the NR SL DCI format 3_1 used to schedule LTE SL transmission resources over an NR Uu connection and the NR SL DCI format 3_0 used to schedule NR SL transmission resources over an NR Uu connection may need to have the same DCI size. The reason may be to limit the blind detection complexity that the UE needs to monitor for NR SL DCI or NR Uu DCI to a certain range or less.

[0233] In this case, for example, in the NR SL DCI format 3_0, there may be two types of DCI: DCI for dynamic grant and DCI for configured grant type 2 (type-2). Therefore, the base station may determine or align the size of the NR SL DCI format 3_1 so that the size of the NR SL DCI format 3_1 matches the maximum value of the size of the NR SL DCI format 3_0 for dynamic grant and the size of the NR SL DCI format 3_0 for configured grant type 2. Alternatively, for example, the base station may determine or align the size of the NR SL DCI format 3_1 so that the size of the NR SL DCI format 3_1 matches the minimum value of the size of the NR SL DCI format 3_0 for dynamic grant and the size of the NR SL DCI format 3_0 for configured grant type 2. For example, the base station's operation of aligning the size of the NR SL DCI format may include the base station performing zero padding on the DCI having a smaller size.

[0234] Alternatively, for example, for the above operation, when the size of the NR SL DCI format 3_0 used for dynamic authorization and the size of the NR SL DCI format 3_0 used for configured authorization type 2 are different, the base station can align the size of the NR SLDCI format 3_0 with the smaller size with the NR SL DCI format 3_0 with the larger size.

[0235] Alternatively, for example, when the size of the NR SL DCI format 3_0 for dynamic authorization and the size of the NR SL DCI format 3_0 for configured authorization type 2 are both smaller than the size of the NR SL DCI format 3_1, the base station may align the size of the NR SL DCI format 3_0 for dynamic authorization and the size of the NR SL DCI format 3_0 for configured authorization type 2 with the size of the NR SL DCI format 3_1 by performing zero padding on the NR SL DCI format 3_0 for dynamic authorization and the NR SL DCI format 3_0 for configured authorization type 2, etc.

[0236] Alternatively, for example, when the size of the NR SL DCI format 3_0 for dynamic grant and the size of the NR SL DCI format 3_0 for configured grant type 2 are both smaller than the size of the NR SL DCI format 3_1, the base station may truncate the NR SL DCI format 3_1. By doing so, the base station may align the size of the NR SL DCI format 3_1 with the maximum of the size of the NR SL DCI format 3_0 for dynamic grant and the size of the NR SL DCI format 3_0 for configured grant type 2.

[0237] Alternatively, the UE may expect or determine that the NR base station configures the size of at least one of the NR SL DCI format 3_0 used for dynamic authorization and the size of the NR SL DCI format 3_0 used for configured authorization type 2 to be larger than the size of the NR SL DCI format 3_1.

[0238] Alternatively, for example, based on the size of the NR SLDCI format having the maximum value among the size of the NR SL DCI format 3_0 for dynamic grant, the size of the NR SL DCI format 3_0 for configured grant type 2, and the size of the NR SL DCI format 3_1, the base station can align the size of the NR SLDCI format by zero padding for the remaining NR SLDCI formats having smaller sizes.

[0239] In this case, for example, the base station can align the size of the NR SL DCI format 3_0 for dynamic grant and the size of the NR SL DCI format 3_0 for configured grant type 2 with the size of the NR Uu DCI for scheduling the UL / DL transmission resources of the UE through the NR Uu link. To this end, the size of the NR SL DCI format 3_0 having the larger size between the NR SL DCI format 3_0 for dynamic grant and the NR SL DCI format 3_0 for configured grant type 2 can be size-aligned with the NR Uu DCI size, which allows the number of padded zeros to be minimized among the NR Uu DCI sizes.

[0240] According to an embodiment of the present disclosure, when a UE transmits a synchronized S-SSB required for SL communication, the number of bits of the RESERVED field reserved for future scalability in the information constituting the PSBCH can be determined by the number of input bits of the PSBCH bit interleaver or polarization code. Alternatively, for example, the base station or network can configure or pre-configure the number of bits of the RESERVED field for the UE.

[0241] In the present disclosure, when scheduling LTE SL transmission resources over an NR Uu connection, a method has been proposed so that all UEs can have the same understanding and determine the LTE SL transmission resources based on the timing offset configured by the NR base station without ambiguity regarding the LTE SL transmission resources between UEs. In addition, a method for efficiently performing size alignment between DCIs for scheduling LTE SL transmission resources over NR Uu and DCIs for scheduling LTE SL transmission resources over NR Uu has been proposed. Hereinafter, devices to which various embodiments of the present disclosure can be applied will be described.

[0242] 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 (e.g., 5G) between devices.

[0243] 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.

[0244] Figure 17 A communication system (1) according to an embodiment of the present disclosure is shown.

[0245] Reference Figure 17, a communication system (1) to which various embodiments of the present disclosure are applied includes a wireless device, a base station (BS), and a network. Herein, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)) and may be referred to as a communication / radio / 5G device. The wireless device may include, but is not limited to, a robot (100a), a vehicle (100b-1 and 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.

[0246] Here, in addition to LTE, NR, and 6G, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may include 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 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 the following 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 Bluetooth, a low-power wide area network (LPWAN), and ZigBee, which considers 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 small / low-power digital communication based on various standards including IEEE 802.15.4, and can be referred to by various names.

[0247] 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.

[0248] 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.

[0249] Figure 18 A wireless device according to an embodiment of the present disclosure is shown.

[0250] Reference Figure 18 , 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 17 {wireless device (100x) and BS (200)} and / or {wireless device (100x) and wireless device (100x)}.

[0251] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may additionally further include one or more transceivers 106 and / or one or more antennas 108. The 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.

[0252] 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.

[0253] 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.

[0254] 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.

[0255] 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.

[0256] 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.

[0257] Figure 19 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0258] Reference Figure 19 , the signal processing circuit (1000) may include a scrambler (1010), a modulator (1020), a layer mapper (1030), a precoder (1040), a resource mapper (1050) and a signal generator (1060). Figure 19 operations / functions, not limited to Figure 18 The processor (102, 202) and / or transceiver (106, 206) of Figure 18The processor (102, 202) and / or transceiver (106, 206) are implemented Figure 19 For example, you can Figure 18 Alternatively, the processor (102, 202) can implement blocks 1010 to 1060. Figure 18 The processor (102, 202) implements blocks 1010 to 1050 and can be implemented by Figure 18 The transceiver (106, 206) is used to implement block 1060.

[0259] Can be passed Figure 19 The signal processing circuit (1000) converts the codeword into a radio signal. Herein, the codeword is a coded bit sequence of an information block. The information block may include a transport block (e.g., UL-SCH transport block, DL-SCH transport block). The radio signal may be transmitted via various physical channels (e.g., PUSCH and PDSCH).

[0260] 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.

[0261] 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.

[0262] Can be used with Figure 19 The signal processing process for a signal received in a wireless device is configured in a manner opposite to the signal processing process (1010 to 1060) of FIG. Figure 18 100 and 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.

[0263] Figure 20 Another example of a wireless device according to an embodiment of the present disclosure is shown. The wireless device can be implemented in various forms according to use cases / services (see Figure 17 ).

[0264] Reference Figure 20 , the wireless device (100 and 00) may correspond to Figure 18 The wireless devices (100 and 200) may be configured by various elements, components, units / portions, and / or modules. For example, each of the wireless devices (100 and 200) may include a communication unit (110), a control unit (120), a memory unit (130), and additional components (140). The communication unit may include a communication circuit (112) and (one or more) transceivers (114). For example, the communication circuit (112) may include Figure 18 One or more processors (102 and 202) and / or one or more memories (104 and 204). For example, the transceiver(s) (114) may include Figure 18The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and the additional components (140), and controls the overall operation of the wireless device. For example, the control unit (120) can control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the 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).

[0265] 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 17 100a), vehicles ( Figure 17 100b-1 and 100b-2), XR devices ( Figure 17 100c), handheld device ( Figure 17 100d), household appliances ( Figure 17 100e), IoT devices ( Figure 17 100f), digital broadcast terminal, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Figure 17 400), BS( Figure 17 200), network nodes, etc. Depending on the use case / service, the wireless device can be used in a mobile or fixed place.

[0266] exist Figure 20In the wireless device (100 and 200), the various elements, components, units / parts and / or modules in the wireless device (100 and 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 and 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 and 140) can be connected wirelessly through the communication unit (110). Each element, component, unit / part and / or module in the wireless device (100 and 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 unit ( 130 ) may be constructed by random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, nonvolatile memory, and / or a combination thereof.

[0267] Hereinafter, the implementation will be described in detail with reference to the accompanying drawings. Figure 20 .

[0268] Figure 21 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).

[0269] Reference Figure 21 , the handheld device (100) may include an antenna unit or antenna (108), a communication unit (110), a control unit (120), a memory unit (130), a power supply unit (140a), an interface unit (140b) and an I / O unit (140c). The antenna unit or antenna (108) may be configured as part of the communication unit (110). Blocks 110 to 130 / 140a to 140c correspond to Figure 20 Frame 110 to 130 / 140.

[0270] 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 memory unit 130 can store data / parameters / programs / codes / commands required to operate the handheld device 100. The memory 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.

[0271] 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 memory 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 memory unit 130 and can be output as various types (e.g., text, voice, image, video, or tactile) through the I / O unit 140.

[0272] Figure 22 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.

[0273] Reference Figure 22 , the vehicle or autonomous vehicle (100) may include an antenna unit or antenna (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 or antenna (108) may be configured as part of the communication unit (110). Blocks 110 / 130 / 140a to 140d correspond to Figure 20 Box 110 / 130 / 140.

[0274] 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.

[0275] 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.

[0276] 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 with a first device, the method comprising the following steps: receiving time division duplex-uplink-downlink TDD-UL-DL configuration information from a base station, the TDD-UL-DL configuration information including information related to the first time slot pattern and information related to the second time slot pattern, The information related to the first time slot pattern includes information related to the period of the first time slot pattern and information related to the first UL resource, and The information related to the second time slot pattern includes information related to the period of the second time slot pattern and information related to the second UL resource; obtaining the number of first SL slots associated with the first slot pattern and the number of second SL slots associated with the second slot pattern based on a first subcarrier spacing SCS associated with sidelink SL communication and the TDD-UL-DL configuration information; and transmitting a physical side link broadcast channel PSBCH including information related to the number of the first SL time slots and the number of the second SL time slots to the second device, wherein, based on i) the information related to the period of the first time slot pattern, ii) the information related to the period of the second time slot pattern, and iii) the first SCS, the number of the first SL time slots and the number of the second SL time slots are expressed on the basis of counting multiple time slots as one unit, wherein the SL communication is performed based on the number of the first SL time slots and the number of the second SL time slots, and The information related to the number of the first SL time slots and the number of the second SL time slots is 7-bit information.

2. The method according to claim 1, wherein The unit for counting the multiple time slots as one is a unit for counting the time slots associated with the second SCS lower than the first SCS as one.

3. The method according to claim 2, wherein: The second SCS is an SCS obtained by dividing the first SCS by a number that is a power of 2.

4. The method according to claim 3, wherein: Said number of powers of 2 is a value related to the granularity of the time slots.

5. The method according to claim 3, wherein Based on the fact that the sum of the period of the first time slot pattern and the period of the second time slot pattern is 4 ms and the first SCS is 120 kHz, the number of powers of 2 is 2.

6. The method according to claim 3, wherein: Based on the fact that the sum of the period of the first time slot pattern and the period of the second time slot pattern is 5 ms and the first SCS is 120 kHz, the number of powers of 2 is 2.

7. The method according to claim 3, wherein: Based on the period of the first time slot pattern being 5ms, the period of the second time slot pattern being 5ms, and the first SCS being 60kHz, the number of powers of 2 is 2.

8. The method according to claim 3, wherein: Based on the period of the first time slot pattern being 10 ms, the period of the second time slot pattern being 10 ms, and the first SCS being 30 kHz, the number of powers of 2 is 2.

9. The method according to claim 3, wherein: Based on the period of the first time slot pattern being 5 ms, the period of the second time slot pattern being 5 ms, and the first SCS being 120 kHz, the number of powers of 2 is 4.

10. The method according to claim 3, wherein: Based on the period of the first time slot pattern being 10ms, the period of the second time slot pattern being 10ms, and the first SCS being 60kHz, the number of powers of 2 is 4.

11. The method according to claim 3, wherein: Based on the fact that the period of the first time slot pattern is 10 ms, the period of the second time slot pattern is 10 ms, and the first SCS is 120 kHz, the number of powers of 2 is 8.

12. The method according to claim 1, wherein The first UL resource includes at least one of a first UL time slot or a first UL symbol, and The second UL resource includes at least one of a second UL time slot or a second UL symbol.

13. The method according to claim 1, wherein The first UL resource is used as the first SL time slot, and The second UL resource is used as the second SL time slot.

14. A first device for performing wireless communication, the first device comprising: one or more memories storing instructions; one or more transceivers; as well as one or more processors connected to the one or more memories and the one or more transceivers, wherein the one or more processors execute the instructions to: receiving time division duplex-uplink-downlink TDD-UL-DL configuration information from a base station, the TDD-UL-DL configuration information including information related to the first time slot pattern and information related to the second time slot pattern, The information related to the first time slot pattern includes information related to the period of the first time slot pattern and information related to the first UL resource, and The information related to the second time slot pattern includes information related to the period of the second time slot pattern and information related to the second UL resource; obtaining the number of first SL slots associated with the first slot pattern and the number of second SL slots associated with the second slot pattern based on a first subcarrier spacing SCS associated with sidelink SL communication and the TDD-UL-DL configuration information; and transmitting a physical side link broadcast channel PSBCH including information related to the number of the first SL time slots and the number of the second SL time slots to the second device, wherein, based on i) the information related to the period of the first time slot pattern, ii) the information related to the period of the second time slot pattern, and iii) the first SCS, the number of the first SL time slots and the number of the second SL time slots are expressed on the basis of counting multiple time slots as one unit, wherein the SL communication is performed based on the number of the first SL time slots and the number of the second SL time slots, and The information related to the number of the first SL time slots and the number of the second SL time slots is 7-bit information.

15. A device configured to control a first user equipment (UE), 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 time division duplex-uplink-downlink TDD-UL-DL configuration information from a base station, the TDD-UL-DL configuration information including information related to the first time slot pattern and information related to the second time slot pattern, The information related to the first time slot pattern includes information related to the period of the first time slot pattern and information related to the first UL resource, and The information related to the second time slot pattern includes information related to the period of the second time slot pattern and information related to the second UL resource; obtaining the number of first SL slots associated with the first slot pattern and the number of second SL slots associated with the second slot pattern based on a first subcarrier spacing SCS associated with sidelink SL communication and the TDD-UL-DL configuration information; and transmitting a physical sidelink broadcast channel PSBCH including information related to the number of the first SL time slots and the number of the second SL time slots to the second UE, wherein, based on i) the information related to the period of the first time slot pattern, ii) the information related to the period of the second time slot pattern, and iii) the first SCS, the number of the first SL time slots and the number of the second SL time slots are expressed on the basis of counting multiple time slots as one unit, wherein the SL communication is performed based on the number of the first SL time slots and the number of the second SL time slots, and The information related to the number of the first SL time slots and the number of the second SL time slots is 7-bit information.

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