Terminal unit and communication method

Abstract

To efficiently select a channel access priority class value to achieve a fair channel access.SOLUTION: A terminal device, if applying a multi-channel access procedure to perform a plurality of sidelink transmissions with a plurality of channels in one or more consecutive slots, selects the highest channel access priority class value among a plurality of channel access priority class values related to the plurality of sidelink transmissions, and uses the channel access priority class value selected in the multi-channel access procedure for a channel in which a Type 1 channel access procedure is performed.SELECTED DRAWING: Figure 13

Description

[Technical field]

[0001] The present invention relates to a terminal device and a communication method. [Background technology]

[0002] A wireless access method and wireless network for cellular mobile communications (hereinafter referred to as "Long Term Evolution (LTE)" or "EUTRA: Evolved Universal Terrestrial Radio Access") (hereinafter referred to as "LTE") is being considered in the 3rd Generation Partnership Project (3GPP). In LTE, a base station device is also called eNodeB (evolved NodeB), and a terminal device is also called UE (User Equipment). LTE is a cellular communication system in which areas covered by base station devices are arranged in the form of multiple cells. A single base station device may manage multiple serving cells.

[0003] 3GPP is currently studying and standardizing the next-generation standard (NR: New Radio) as a 5G communication method. NR is expected to meet the requirements for three scenarios, eMBB (enhanced Mobile BroadBand), mMTC (massive Machine Type Communication), and URLLC (Ultra Reliable and Low Latency Communication), within a single technology framework.

[0004] NR supports a sidelink technology that enables terminal devices to communicate directly with each other without going through a base station device. In addition, application of the sidelink technology to unlicensed spectrum is under consideration (Non-Patent Document 1). [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] "Title: New WID on NR sidelink evolution ", RP-213678, OPPO, LG Electronics. 3GPP TSG RAN Meeting #94e, Dec.6-17, 2021 Summary of the Invention [Problem to be solved by the invention]

[0006] In unlicensed bands, LBT (Listen Before Talk) based on CCA (Clear Channel Assessment) is used to coexist with other systems. In Japan and Europe, the LBT function is required for systems operating in the unlicensed 5 GHz band. When multiple channels are used for transmission, a multi-channel access procedure is performed. In the multi-channel access procedure, Type 1 channel access procedure is used. If the channel access priority class value is determined only within the channel in which the Type 1 channel access procedure is performed, it may be unfair to the terminal device that performs the Type 1 channel access procedure for transmission on one channel. In addition, if the channel access priority class value is different for each channel performing the Type 1 channel access procedure in the multi-channel access procedure, The channel occupancy time is different for each slot. In the case where a multi-channel access procedure is applied to perform multiple sidelink transmissions on multiple channels in a single UE, the maximum channel access priority class value from the multiple associated sidelink transmissions is selected and used on the channel on which Type 1 channel access priority is performed. This allows for fair channel access. This embodiment applies to multiple sidelink transmissions on multiple channels in one or more consecutive slots. The present invention provides a terminal device that can efficiently select a channel access priority class value and be used on a channel on which Type 1 channel access procedure is performed when a multi-channel access procedure is applied to perform packet transmission, and a communication method used for the terminal device. [Means for solving the problem]

[0007] (1) A first aspect of the present invention is a terminal device comprising a processor and a memory for storing computer program code, the terminal device including: applying a multi-channel access procedure for a plurality of sidelink transmissions on a channel, selecting a maximum channel access priority class value among a plurality of channel access priority class values ​​associated with the plurality of sidelink transmissions, and using the channel access priority class value selected in the multi-channel access procedure for the channel for which Type 1 channel access procedure is performed.

[0008] (2) A second aspect of the present invention is a communication method for use in a terminal device, comprising: applying a multi-channel access procedure for multiple sidelink transmissions on multiple channels in a number of consecutive slots, selecting a maximum channel access priority class value among multiple channel access priority class values ​​associated to the multiple sidelink transmissions, and using the channel access priority class value selected in the multi-channel access procedure for a channel for which Type 1 channel access procedure is performed. Effect of the Invention

[0009] Efficiently select CPE starting positions to prevent your own transmissions from being blocked can be done. [Brief description of the drawings]

[0010] [Figure 1] 1 is a conceptual diagram of a wireless communication system according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram illustrating an example of a resource grid in a subframe according to an aspect of the present embodiment. [Diagram 3] 1 is a schematic block diagram showing a configuration of a terminal device 1 according to an aspect of the present embodiment. [Figure 4] FIG. 2 is a schematic block diagram showing a configuration of a base station device 3 according to an aspect of the present embodiment. [Diagram 5] FIG. 2 is a diagram illustrating an example of interlace mapping according to an aspect of this embodiment. [Figure 6] FIG. 1 is a diagram showing an example of an arrangement of PSCCHs monitored in a terminal device 1 according to an embodiment of the present invention. [Figure 7] FIG. 1 is a diagram showing an example of an arrangement of PSCCHs monitored in a terminal device 1 according to an embodiment of the present invention. [Figure 8] 1 is a diagram showing an example of a resource selection procedure in a terminal device 1 according to an aspect of this embodiment. [Figure 9]1 is a diagram showing an example of a slot arrangement of MCSt of a terminal device 1 according to an aspect of this embodiment. FIG. [Figure 10] FIG. 1 is a diagram showing an example of an arrangement of consecutive slot transmissions including multiple sidelink transmissions of a terminal device 1 according to an embodiment of the present invention. [Figure 11] FIG. 1 is a diagram illustrating an example of sidelink transmission in multiple channels of a terminal device 1 according to an embodiment of the present invention. [Figure 12] FIG. 13 is a diagram showing multiple sidelink transmissions in multiple channels in consecutive slots of a terminal device 1 according to one embodiment of this embodiment. [Figure 13] A figure showing an example of processing of a multi-channel access procedure for performing multiple sidelink transmissions on multiple channels in one or more consecutive slots of a terminal device 1 according to one embodiment of this embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described.

[0012] "A and / or B" may be a term that includes "A", "B", or "A and B".

[0013] A parameter or information indicating one or more values ​​may mean that the parameter or information at least includes a parameter or information indicating the one or more values. The upper layer parameter may be a single upper layer parameter. The upper layer parameter may be an information element (IE) including multiple parameters.

[0014] FIG. 1 is a conceptual diagram of a wireless communication system according to an aspect of the present embodiment. In FIG. 1, the wireless communication system includes terminal devices 1A to 1C and a base station device 3 (gNB). Hereinafter, the terminal devices 1A to 1D are also referred to as terminal device 1 (UE).

[0015] The base station device 3 is a master cell group (MCG) and a secondary cell group (SCG). The MCG may be configured to include one or both of the above. The MCG is a group of serving cells including at least a PCell (Primary Cell). The SCG is a group of serving cells including at least a PSCell (Primary Secondary Cell). The PCell is a cell in which an initial connection establishment procedure or a connection re-establishment procedure is performed by the terminal device 1. The PSCell is a serving cell on which the random access procedure is performed by the terminal device 1. The MCG may be configured to include one or more SCells (Secondary Cells). The SCG may be configured to include one or more SCells. The serving cell identity is a short identifier for identifying a serving cell. The serving cell identifier may be provided by a higher layer parameter.

[0016] The serving cell group (cell group) is the MCG, SCG, and PUCCH cell group. A serving cell group may include one or more serving cells (or component carriers). One or more serving cells (or component carriers) included in a serving cell group may be operated by carrier aggregation.

[0017] The base station device 3 communicates with the terminal device 1 using different frequency bands (carrier frequencies, frequency spectrums). This operation (multi-carrier operation) may be called carrier aggregation or dual connectivity. Different cells (serving cells) use different frequency bands. In the base station device 3 and the terminal device 1, the multiple cells used in carrier aggregation may be such that one cell uses a downlink frequency band and an uplink frequency band, and the other cells use only a downlink frequency band, or the other cells may also use a downlink frequency band and an uplink frequency band. The terminal device 1 makes an initial connection with the base station device 3, and after the connection with the base station device 3 is established, multiple cell connections are added. The terminal device 1 is added with a frequency band used for communication. The terminal device 1 is added with a cell (serving cell) used for communication. The terminal device 1 is added with a connection to the base station device 3.

[0018] Terminal device 1A and terminal device 1B perform direct communication using side link technology. Terminal device 1A and terminal device 1B are located within the coverage of base station device 3 (in-coverage). Terminal device 1A and terminal device 1C perform direct communication using side link technology. Terminal device 1C and terminal device 1D perform direct communication using side link technology. Terminal device 1C and terminal device 1D are located outside the coverage of base station device 3 (out-of-coverage). Direct communication between in-coverage terminal device 1, and between in-coverage terminal device 1 and out-of-coverage terminal device There are three cases: direct communication between terminal devices 1 in a coverage area; direct communication between terminal devices 1 in a coverage area; and direct communication between terminal devices 1 in an out-of-coverage area.

[0019] In the wireless communication system, the terminal device 1 and the base station device 3 may use one or more communication methods. For example, CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplex) may be used in the downlink of the wireless communication system. Also, either CP-OFDM or DFT-s-OFDM (Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplex) may be used in the uplink of the wireless communication system. Here, DFT-s-OFDM is a communication method in which modified precoding is applied prior to signal generation in CP-OFDM. Here, modified precoding is also called DFT precoding.

[0020] The side link between the terminal device 1 and the terminal device 1 may use CP-OFDM. The sidelink between the end device 1 and the terminal device 1 may use DFT-s-OFDM.

[0021] As shown in Fig. 1, the base station device 3 may be configured with one transceiver device (or a transmission point, a transmitting device, a receiving point, a receiving device, a transceiver point). On the other hand, in some cases, the base station device 3 may be configured to include multiple transceivers. When the base station device 3 is configured with multiple transceivers, each of the multiple transceivers may be located at a different geographical location.

[0022] The subcarrier spacing (SCS: SubCarrier Spacing) Δf for a certain subcarrier spacing setting μ is Δf = 2 μ For example, the subcarrier spacing setting μ may indicate any of 0, 1, 2, 3, and 4.

[0023] Time unit T c =1 / (Δf max ×N f) may be used to represent the length in the time domain, where Δf max = 480 kHz. f = 4096. The constant κ may be expressed as κ = Δf max ×N f / (Δf ref N f,r ef )=64. Also, Δf ref may be 15 kHz. f,re f is 2048.

[0024] The transmission of downlink / uplink signals may be organized into radio frames (system frames, frames) of length Tf, where Tf=(Δfmax×Nf / 100)×Ts=10 ms.

[0025] The transmission of sidelink signals may be organized in radio frames (system frames, frames) of length Tf, where Tf=(Δfmax×Nf / 100)×Ts=10 ms.

[0026] A radio frame may be configured to include 10 subframes. Here, the length of the subframe may be Tsf = (Δfmax × Nf / 1000) × Ts = 1 ms. Even if the number of OFDM symbols per frame is Nsubframe, μsymb=Nslotsymb×Nsubframe, μslot, good.

[0027] The OFDM symbol is used as a unit of time domain for a communication method used in a wireless communication system. For example, the OFDM symbol may be used as a unit of time domain for CP-OFDM. , an OFDM symbol may be used as a time domain unit of DFT-s-OFDM.

[0028] A slot may be configured to include multiple OFDM symbols. For example, one slot may be configured by Nslotsymb consecutive OFDM symbols. For example, in the case of normal CP, In the setting, Nslotsymb=14 may be used. In addition, in the setting of the extended CP, Nslotsymb =12.

[0029] Slots may be indexed in the time domain. For example, the slot index nμs ranges from 0 to Nsubframe,μslot-1 in ascending integer increments in the subframe. In addition, the slot index nμs,f may be given in the order It may be given in ascending order as integer values ​​ranging from 0 to Nframe, μslot-1.

[0030] Fig. 2 is a diagram showing an example of the configuration of a resource grid according to one aspect of the present embodiment. In the resource grid of Fig. 2, the horizontal axis is the OFDM symbol index lsym, and the vertical axis is the subcarrier index ksc. The resource grid of Fig. 2 includes Nsize, μgrid, x × NRBsc subcarriers and Nsubframe, μsymb OFDM symbols. Here, Nsize, μgrid, and x indicate the bandwidth of the SCS specific carrier. The values ​​of Nsize, μgrid, and x are expressed in units of resource blocks.

[0031] Within the resource grid, the subcarrier index ksc and the OFDM symbol index The resource identified by the lsym is a ResourceElement (RE). It is also called.

[0032] A resource block (RB) contains NRBsc consecutive subcarriers. The resource blocks are the common resource block (CRB), the physical resource block (PBR), and the It is a general term for a source block (PRB: Physical Resource Block) and a virtual resource block (VRB: Virtual Resource Block). For example, NRBsc=12 may be used.

[0033] A BandWidth Part (BWP) may be configured as a subset of the resource grid. Here, the BWP set for the downlink is also called a downlink BWP, and the BWP set for the uplink is also called an uplink BWP.

[0034] The BWP configured for the sidelink is also called a sidelink BWP.

[0035] Carrier aggregation is the process of aggregating multiple serving The carrier aggregation may be a communication using a cell. The carrier aggregation may be a communication using a plurality of aggregated component carriers. The carrier aggregation may be a communication using a plurality of aggregated downlink component carriers. The carrier aggregation may be a communication using a plurality of aggregated uplink component carriers.

[0036] An example of the configuration of the terminal device 1 according to one aspect of this embodiment will be described below.

[0037] 3 is a schematic block diagram showing a configuration of a terminal device 1 according to an embodiment of the present invention. As shown in the figure, the terminal device 1 includes a radio transmission / reception unit 10 and an upper layer processing unit 14. The radio transmission / reception unit 10 includes an antenna unit 11, an RF (Radio Frequency) unit 12, and and a part or all of a baseband unit 13. The upper layer processing unit 14 is configured to include at least a medium access control layer processing unit 15 and a part or all of a radio resource control layer processing unit 16. The radio transceiver unit 10 is also referred to as a transmitting unit, a receiving unit, or a physical layer processing unit.

[0038] The wireless transmitting / receiving unit 10 performs physical layer processing.

[0039] For example, the radio transceiver 10 may generate a baseband signal of an uplink physical channel. Here, the transport block delivered from the higher layer on the UL-SCH is For example, the radio transceiver unit 10 may generate a baseband signal of an uplink physical signal.

[0040] For example, the radio transceiver 10 may attempt to detect information transmitted by a downlink physical channel. Here, a transport block of the information transmitted by the downlink physical channel may be delivered to a higher layer on a DL-SCH. For example, the radio transceiver 10 may attempt to detect information transmitted by a downlink physical signal.

[0041] For example, the radio transceiver unit 10 may generate a baseband signal of a sidelink physical channel. For example, the radio transceiver unit 10 may generate a baseband signal of a sidelink physical signal. For example, the radio transceiver unit 10 may attempt to detect information transmitted by the sidelink physical channel. For example, the radio transceiver unit 10 may attempt to detect information transmitted by the sidelink physical signal.

[0042] The receiving unit of the terminal device 1 receives the PDCCH. Processes receiving PDCCH in frequency band (cell, component carrier, carrier) The reception processing unit of the terminal device 1 performs processing such as demodulation and decoding on the PDCCH. The reception processing unit performs a process of receiving the PDCCH and a process of detecting the downlink control information. cormorant.

[0043] The receiving unit of the terminal device 1 receives the PDSCH. Processes receiving PDSCH in frequency band (cell, component carrier, carrier) The reception processing unit of the terminal device 1 performs processes such as demodulation and decoding on the PDSCH.

[0044] The receiving unit of the terminal device 1 receives the PSCCH. The receiving processing unit of the terminal device 1 performs processing such as demodulation and decoding on the PSCCH. The receiving processing unit of the terminal device 1 performs processing to receive the PSCCH, The receiving unit of the terminal device 1 performs a process of detecting side link control information. The receiving unit of the terminal device 1 determines frequency resources (interlaces and resource blocks, described later). The receiving unit of the terminal device 1 determines OFDM symbols in which the PSCCH can be arranged. The receiving unit of the terminal device 1 blindly decodes the PSCCH. The receiving unit of the terminal device 1 blindly decodes the PSCCH in one slot in one resource pool. The receiving unit of the terminal device 1 The receiver of the terminal device 1 may blindly decode the PSCCH in two or more slots. Two or more PSCCHs in one slot may be blindly decoded in one resource pool. The receiving unit of the terminal device 1 receives the PSSCH. The receiving processing unit of the terminal device 1 performs processing such as demodulation and decoding on the PSSCH. The receiving unit of the terminal device 1 receives the PSFCH. The reception processing unit receives the HARQ-ACK via the PSFCH.

[0045] The transmission unit (also referred to as a transmission processing unit) of the terminal device 1 transmits a HARQ-ACK. The transmission processing unit of the terminal device 1 transmits a HARQ-ACK for a PDSCH. Transmit HARQ-ACK in the link frequency band (cell, component carrier, carrier).

[0046] The transmission processing unit of the terminal device 1 transmits a HARQ-ACK for the PSSCH. The management unit transmits the HARQ-ACK in the sidelink frequency band. The transmission processing unit of the terminal device 1 transmits the HARQ-ACK on the PSFCH. The transmission processing unit of the terminal device 1 may transmit the HARQ-ACK on the PSSCH. The transmission processing unit of the terminal device 1 does not need to transmit the HARQ-ACK for the PSSCH.

[0047] The transmission unit of the terminal device 1 transmits the PSCCH. The transmission processing unit of the terminal device 1 performs processing such as encoding and modulation on the PSCCH. The transmission processing unit of the terminal device 1 performs processing to transmit side link control information using the PSCCH. The transmission unit of the terminal device 1 determines frequency resources (interlaces and resource blocks, which will be described later) constituting the PSCCH. The transmission unit of the terminal device 1 transmits the PSCCH. The OFDM symbol in which H can be placed is determined. The transmitting unit of the terminal device 1 transmits the PSSCH. The transmitting processing unit of the terminal device 1 performs processing such as encoding and modulation on the PSSCH.

[0048] The upper layer processing unit 14 outputs uplink data (transport block) generated by a user operation or the like to the radio transmitting / receiving unit 10. The upper layer processing unit 14 processes the MAC layer, the packet Packet Data Convergence Protocol (PDCP) layer, wireless link It processes the Radio Link Control (RLC) layer and the RRC layer.

[0049] The upper layer processing unit 14 outputs the side link data (transport block) to the radio transmitting / receiving unit 10.

[0050] A media access control layer processing unit (MAC layer processing unit) 15 included in the upper layer processing unit 14 performs processing of the MAC layer.

[0051] The radio resource control layer processing unit 16 included in the upper layer processing unit 14 performs processing of the RRC layer. The line resource control layer processing unit 16 processes various setting information / parameters (RRC parameters) of the own device. The radio resource control layer processor 16 sets various setting information / parameters (RRC parameters) based on the higher layer signal received from the base station device 3. The line resource control layer processing unit 16 sets various setting information / parameters (RRC parameters) based on information indicating various setting information / parameters (RRC parameters) received from the base station device 3. The setting information includes a physical channel, a physical signal (i.e., a physical layer), a MAC layer , PDCP layer, RLC layer, RRC layer processing or configuration related information. The parameters may be higher layer parameters.

[0052] For example, the radio resource control layer processing unit 16 may receive an RRC message on a certain logical channel. and set the acquired RRC parameters in a storage area of ​​the terminal device 1. The RRC parameters set in the storage area of ​​the terminal device 1 may be provided to a lower layer.

[0053] The radio resource control layer processing unit 16 performs the following operation based on the RRC signaling received from the base station device 3. The radio resource control layer processing unit 16 sets a control resource set in the control resource set. The radio resource control layer processing unit 16 sets (configures) a search space in the control resource set. The radio resource control layer processing unit 16 sets (configures) PDCCH candidates to be monitored in the control resource set. The control unit 16 configures the number of PDCCH candidates to be monitored in the control resource set. The radio resource control processing unit 16 sets (configures) the aggregation level of the PDCCH candidates to be monitored within the control resource set.

[0054] The radio resource control layer processing unit 16 controls the DCI format monitored in the control resource set. The radio resource control layer processing unit 16 sets the DCI phase monitored within the search area. The radio resource control layer processing unit 16 may set a DCI format to be monitored in the control resource set based on the RRC signaling indicated by the base station device 3. The radio resource control layer processing unit 16 may set a DCI format to be monitored in the control resource set based on the RRC signaling indicated by the base station device 3. The radio resource control may configure the DCI format to be monitored within the search area. The layer processing unit 16 sets one or more DCI formats to be monitored in the reception processing unit. do.

[0055] The radio resource control layer processor 16 performs settings related to a plurality of search spaces. The settings related to the plurality of search spaces are each indexed.

[0056] The radio resource control layer processing unit 16 performs the following operation based on the RRC signaling received from the base station device 3. Configure the settings related to CSI feedback (transmission of channel state information) for the radio resources. The control layer processor 16 sets the CSI feedback transmission period, the CSI feedback transmission start timing (offset), the CSI feedback information type, etc. The control layer processing unit 16 performs configuration related to a plurality of CSI feedbacks. The configuration related to the plurality of CSI feedbacks is each indexed.

[0057] The radio resource control layer processing unit 16 performs the following operation based on the RRC signaling received from the base station device 3. The radio resource control layer processing unit 16 configures the SPS resources (PDSCH The SPS resource (PDSCH resource) start timing (offset), the number of HARQ processes configured for SPS, the offset used to derive the HARQ process ID used for SPS, the RNTI value for SPS scheduling, etc. are set. The line resource control layer processor 16 performs settings related to a plurality of SPSs. The settings related to the plurality of SPSs are each indexed.

[0058] The radio resource control layer processing unit 16 performs a process based on the RRC signaling received from the base station device 3. The radio resource control layer processing unit 16 sets up a serving cell (secondary cell, primary secondary cell) as the carrier aggregation setting. The serving cell may be configured with a downlink component carrier. The serving cell may be configured with a downlink component carrier and an uplink component carrier. The radio resource control layer processing unit 16 controls the radio transmission / reception unit 10 to perform reception processing with the downlink component carrier set in the carrier aggregation configuration. The radio resource control layer processing unit 16 controls the radio transmission / reception unit 10 to perform transmission processing with the uplink component carrier set in the carrier aggregation configuration.

[0059] The radio resource control layer processing unit 16 performs a process based on the RRC signaling received from the base station device 3. The radio resource control layer processing unit 16 sets parameters related to the side link notified from the base station device 3. The parameters related to the side link will be described later. For example, the radio resource control layer processing unit 16 sets parameters related to the side link notified from the base station device 3. For example, the radio resource control layer processor 16 sets the OFDM symbol in which the PSCCH is arranged. For example, the radio resource control layer processor 16 sets a band for one PSCCH. The radio resource control layer processing unit 16 performs settings for the radio transceiver unit 10 regarding transmission and reception of the PSCCH.

[0060] The medium access control layer processor (MAC layer processor) 15 receives the MAC CE from the base station device 3. Activation / deactivation of secondary cells based on the MAC Control Element The media access control layer processor (MAC layer processor) 15 performs activation of the secondary Based on the MAC CE including the activation / deactivation information of the cell, The medium access control layer processor (MAC layer processor) 15 outputs information indicating activation / deactivation for the plurality of serving cells to the radio transceiver 10. The secondary cell is deactivated based on the timer. The media access control layer processor (MAC layer processor) 15 schedules the serving cell from the base station device 3. The system determines whether or not serving cell has been accessed for a certain period of time by measuring with a timer, deactivates the serving cell, and controls the radio transmission / reception unit 10.

[0061] A medium access control layer processor (MAC layer processor) 15 performs sidelink HARQ operations. It processes sidelink scheduling requests, sidelink buffer status reports, and CSI reports.

[0062] The radio resource control layer processing unit 16 may include function information generated based on the functions of the terminal device 1 in an RRC message and transmit the RRC message to the base station device 3.

[0063] The wireless transmission / reception unit 10 performs modulation processing, encoding processing, and transmission processing. The wireless transmission / reception unit 10 generates a physical signal by encoding processing, modulation processing, and baseband signal generation processing (conversion to a time-continuous signal) on data (transport block), and transmits the physical signal to the base station device 3.

[0064] The wireless transceiver 10 performs demodulation, decoding, and reception processing. The wireless transceiver 10 outputs a transport block from the information detected based on the demodulation and decoding processing of the received physical signal to the upper layer processing unit 14 on the DL-SCH.

[0065] The wireless transceiver 10 stops various reception processes and various transmission processes in the deactivated serving cell. For example, the wireless transceiver 10 stops monitoring the PDCCH in the deactivated serving cell. For example, the radio transceiver unit 10 stops receiving the PDSCH in the serving cell. Stop transmitting SRS in the activated serving cell. For example, 10 stops transmitting PUSCH in the deactivated serving cell.

[0066] The RF unit 12 converts (down-converts) the signal received via the antenna unit 11 into a baseband signal and removes unnecessary frequency components. The RF unit 12 outputs the baseband signal to the baseband unit 13.

[0067] The baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal. The baseband unit 13 extracts a CP (Cyclic Prefix) from the converted digital signal. The baseband unit 13 performs a fast Fourier transform (FFT) on the signal from which the CP has been removed, and extracts a signal in the frequency domain.

[0068] The baseband unit 13 performs an inverse fast Fourier transform (IFFT) on the physical signal to generate an OFDM symbol. The baseband unit 13 adds a CP to the symbol to generate a baseband digital signal. The baseband unit 13 converts the baseband digital signal into an analog signal. The baseband unit 13 outputs the converted analog signal to the RF unit 12.

[0069] The RF unit 12 uses a low-pass filter to remove unnecessary frequency components from the analog signal input from the baseband unit 13, and up-converts the analog signal to a carrier frequency. The RF unit 12 converts the RF signal into an RF signal. The RF unit 12 transmits the RF signal via the antenna unit 11. The RF unit 12 also amplifies the power. The RF unit 12 may also have a function of controlling the transmission power. The RF unit 12 is also referred to as a transmission power control unit.

[0070] The wireless transceiver 10 performs carrier sensing (LBT) before transmitting a signal in order to avoid collision of signals with other devices (apparatuses). The following types of LBT are used: Type 1: Random backoff using a variable-sized contention window LBT process Type 2A: LBT with no random backoff process and 25us carrier sense before signal transmission Type 2B: LBT with no random backoff process and 16us carrier sense before signal transmission Type 2C: No LBT

[0071] The wireless transmission / reception unit 10 is in an idle state when there is no transmission from other devices during listening. When the LBT result is an idle state, the wireless transceiver 10 transmits a signal, and when it detects that another device is transmitting (busy state) during listening, it does not transmit a signal. If the LBT result is busy, the transmission opportunity is acquired and the transmission is performed. The time during which there is an opportunity to transmit is called Channel Occupancy Time (COT). In LBT, the terminal device 1 monitors the channel before transmitting data and waits for an idle channel. If the channel is found to be idle, the data is transmitted.

[0072] When performing the random backoff process, the wireless transmission / reception unit 10 randomly generates a backoff counter value within the range of the contention window size after the previous transmission. In the random backoff, the terminal device 1 evaluates whether the channel is in an idle state by detecting channel energy at each time interval using the random backoff counter. The wireless transmission / reception unit 10 waits until it is confirmed that the channel is idle for a certain period of time, and performs carrier sense (sensing) for each sensing slot time. If the result of the carrier sense shows that the channel is idle, the wireless transmission / reception unit 10 decreases the backoff counter value. If the result of the carrier sense shows that the channel is busy, the wireless transmission / reception unit 10 maintains the backoff counter value, waits until it is confirmed that the channel is idle for a certain period of time, and then performs carrier sense. As a result of repeating the above operations, the wireless transmission / reception unit 10 can obtain access to the channel and start transmitting a signal on the channel after the backoff counter value becomes zero.

[0073] When HARQ-ACK feedback is applied to the sidelink, the radio transceiver 10 updates the contention window size based on the status of the HARQ-ACK. When the status of the HARQ-ACK is ACK, the radio transceiver 10 updates the contention window size. The wireless transceiver unit 10 sets the contention window size to the minimum value. If the status of the HARQ-ACK is NACK, the wireless transceiver unit 10 sets the contention window size to the next largest value. If the contention window size reaches the maximum value that can be set, the wireless transceiver unit 10 continues to use the maximum value even if the status of the HARQ-ACK is NACK.

[0074] The initial value of the random backoff counter may be an integer between 0 and the contention window size. Before the random backoff counter is initialized, the contention window size is adjusted to control the average time required for the terminal device 1 to access the channel.

[0075] Terminal device 1 performs listen-before-talk (LBT) on the channel before transmitting on the channel. Terminal device 1 may adjust the amount of time that it performs the LBT. Terminal device 1 may select a random number between zero and the contention window size. If the channel is free for at least the amount of time associated with the random number, terminal device 1 may get a transmission opportunity and transmit.

[0076] An example of the configuration of the base station device 3 according to one aspect of this embodiment will be described below.

[0077] 4 is a schematic block diagram showing a configuration of a base station device 3 according to an aspect of the present embodiment. As shown in the figure, the base station device 3 includes a radio transmission / reception unit 30 and a higher layer processing unit 34. The radio transmission / reception unit 30 includes an antenna unit 31, an RF (Radio Frequency) unit 32, and a baseband unit 33. The higher layer processing unit 34 , a medium access control layer processing unit 35, and a radio resource control layer processing unit 36. The radio transceiver unit 30 is also referred to as a transmitting unit, a receiving unit, or a physical layer processing unit.

[0078] The upper layer processing unit 34 is a MAC (Medium Access Control) layer, a packet data integration protocol It processes the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the Radio Resource Control (RRC) layer. In this specification, the MAC layer is also called the MAC sublayer, the PDCP layer is also called the PDCP sublayer, the RLC layer is also called the RLC sublayer, and the RRC layer is also called the RRC sublayer.

[0079] The media access control layer processing unit 35 included in the upper layer processing unit 34 performs MAC layer processing. Here, the MAC layer process consists of mapping between logical channels and transport channels, Or multiplexing of multiple MAC SDUs (Service Data Units) into a transport block, or decomposition of a transport block delivered from the physical layer on the UL-SCH into one or multiple MAC SDUs. , application of HARQ (Hybrid Automatic Repeat reQuest) to transport blocks; And may include some or all of the processing of scheduling requests.

[0080] The radio resource control layer processing unit 36 ​​included in the upper layer processing unit 34 performs processing of the RRC layer. The processing of the RRC layer may include some or all of management of broadcast signals, management of RRC connection / RRC idle state, and RRC reconfiguration. The radio resource control layer processing unit 36 ​​generates downlink data (transport blocks) arranged in the PDSCH, system information, RRC messages, MAC CE, etc., or acquires them from upper nodes, and outputs them to the radio transmitting / receiving unit 30.

[0081] The radio resource control layer processing unit 36 ​​also manages various setting information / parameters (RRC parameters) of each terminal device 1. In addition, various setting information / parameters may be set for each terminal device 1. That is, the radio resource control layer processing unit 36 ​​transmits / reports information indicating various setting information / parameters. The setting information may be information regarding a physical channel or a physical signal (i.e., a physical layer), a MAC layer, a PDCP The parameters may include information related to processing or configuration of the RLC layer, RRC layer, and RRC layer. The parameters may be higher layer parameters. For example, the radio resource control layer processing unit 36 ​​may include the RRC parameters in an RRC message on a certain logical channel and transmit the RRC parameters to the terminal device 1. Here, the RRC message may be mapped to any one of a BCCH (Broadcast Control CHannel), a CCCH (Common Control CHannel), and a DCCH (Dedicated Control CHannel).

[0082] The radio resource control layer processing unit 36 ​​receives the RRC message from the terminal device 1. Based on the RRC parameters, the RRC parameter to be transmitted to the terminal device 1 may be determined. Here, the RRC message transmitted from the terminal device 1 is related to the capability information report of the terminal device 1. This is also fine.

[0083] The radio resource control layer processing unit 36 ​​sets a control resource set for the terminal device 1. A plurality of PDCCH candidates are configured (set) within the set control resource set. The radio resource control layer processing unit 36 ​​sets a search space for the terminal device 1. The radio resource control layer processing unit 36 ​​sets a DCI format to be monitored in the search space for the terminal device 1. Determine.

[0084] The radio resource control layer processing unit 36 ​​sets a DCI format to be applied to the terminal device 1 within the control resource set. The radio resource control layer processing unit 36 ​​generates RRC signaling indicating one or more DCI formats to be applied in the transmission processing unit.

[0085] The radio resource control layer processing unit 36 ​​performs settings related to a plurality of search spaces. The settings related to the plurality of search spaces are each indexed.

[0086] The radio resource control layer processing unit 36 ​​allocates resources for transmitting the HARQ-ACK to the terminal device 1. The radio resource control layer processing unit 36 ​​sets resources for transmitting HARQ-ACK for the PDSCH in the downlink frequency band (cell, component carrier, carrier). The line resource control layer processing unit 36 ​​allocates resources for transmitting the HARQ-ACK for the PDSCH to the uplink The link frequency band (cell, component carrier, carrier) is set.

[0087] The radio resource control layer processing unit 36 ​​transmits CSI feedback (channel The radio resource control layer processing unit 36 ​​performs settings related to the CSI feed. The radio resource control layer processor 36 sets the transmission period of the CSI feedback, the transmission start timing (offset) of the CSI feedback, the type of CSI feedback information, etc. Configure the feedback settings. Multiple CSI feedback settings can be configured as follows: Will be indexed.

[0088] The radio resource control layer processing unit 36 ​​performs SPS-related settings for the terminal device 1. The resource control layer processing unit 36 ​​controls the period of the SPS resource (PDSCH resource), The radio resource control layer processing unit 36 ​​sets the start timing (offset) of the HARQ process (PDSCH resource), the number of HARQ processes set for the SPS, an offset used to derive the HARQ process ID used for the SPS, an RNTI value for scheduling the SPS, etc. The radio resource control layer processing unit 36 ​​performs settings related to multiple SPSs. The settings related to the multiple SPSs are each indexed.

[0089] The radio resource control layer processing unit 36 ​​performs carrier aggregation configuration for the terminal device 1. The radio resource control layer processing unit 36 ​​performs serving cell (secondary cell, primary secondary cell) configuration as carrier aggregation configuration. The serving cell may be configured with a downlink component carrier. The serving cell may be configured with a downlink component carrier and an uplink component carrier. The radio resource control layer processing unit 36 ​​controls the radio transmission / reception unit 30 to perform transmission processing for the terminal device 1 using the downlink component carrier set in the carrier aggregation configuration. The radio resource control layer processing unit 36 ​​controls the radio transmission / reception unit 30 to perform reception processing for the terminal device 1 using the uplink component carrier set in the carrier aggregation configuration.

[0090] The radio resource control layer processing unit 36 ​​performs sidelink-related settings for the terminal device 1. The radio resource control layer processing unit 36 ​​sets parameters related to the sidelink for the terminal device 1 and notifies the terminal device 1 via the radio transceiver unit 30. For example, the following information is used as the parameters related to the sidelink. Sidelink BWP configuration Sidelink radio bearer configuration Sidelink measurement configuration

[0091] The information indicating the configuration of the Sidelink BWP is the symbol in the slot used for the Sidelink. start position, symbol length, PSBCH configuration, sidelink resource pool configuration, etc. The information indicating the PSBCH configuration includes information indicating parameters used for PSBCH transmission power control. The information indicating the sidelink resource pool configuration includes information indicating the configuration of a sidelink reception resource pool, the configuration of a sidelink transmission resource pool, etc. The configuration of the sidelink transmission resource pool includes a transmission resource pool configuration for a method (mode 1) in which the base station device 3 indicates scheduling information to the terminal device 1, and a transmission resource pool configuration for a method (mode 2) in which the terminal device 1 autonomously selects resources.

[0092] The information indicating the configuration of the sidelink resource pool is the information indicating the configuration of the PSCCH, Information indicating the configuration of the PSFCH, information indicating the size of the sidelink subchannel , information indicating the start position of the sidelink subchannel, MCS tes used in the sidelink Sidelink PTRS configuration information, Sidelink TDD UL-DL configuration information indicating the number of PRBs in the side link resource pool; information indicating the time resources of the sidelink, information indicating parameters of sidelink transmission power control, information indicating the maximum number of reserved PSCCH / PSSCH resources that can be indicated by one SCI, The information includes information indicating a set of sensing intervals, information indicating whether the PSCCH or DM RS of PSSCH is used for L1 RSRP measurement in the sensing operation, information indicating the start position of the sensing window, information indicating the end position of the sensing window, and information indicating the configuration of sidelink synchronization.

[0093] The information indicating the configuration of the sidelink resource pool may include information indicating a slot configuration, which may be applied: a slot configuration in which the PSCCH may be arranged only in the first half of the slot (the second OFDM symbol, or the second and third OFDM symbols), a slot configuration in which the PSCCH may be arranged in the first half of the slot (the second OFDM symbol, or the second and third OFDM symbols), or a slot configuration in which the PSCCH may be arranged in the second half of the slot (the ninth OFDM symbol, or the ninth and tenth OFDM symbols).

[0094] The PSSCH is placed in the OFDM symbol following the OFDM symbol in which the PSCCH is placed. For example, the PSSCH is placed in the second or subsequent OFDM symbols in a slot. For example, if the PSCCH is placed in the first half of a slot, the PSSCH is placed in the second or subsequent OFDM symbols in the slot, and if the PSCCH is placed in the second half of a slot, the PSSCH is placed in the ninth or subsequent OFDM symbols in the slot. It will be placed in the rule.

[0095] The information indicating the configuration of the PSCCH includes information indicating the number of symbols in the PSCCH, information indicating the number of RBs constituting the PSCCH, information indicating the initial value (ID) of the scrambling of the DM RS of the PSCCH; first stage SCI The reserved bits include information about the number of bits reserved in the

[0096] The information indicating the configuration of the PSSCH includes information indicating candidates for β offset used to determine the number of coded modulation symbols of the 2nd stage SCI, information indicating the time domain pattern of the DM RS of the PSSCH, and information indicating a scaling factor for limiting the number of resource elements assigned to the 2nd stage SCI of the PSSCH.

[0097] The information indicating the configuration of the PSFCH includes information indicating a set of PRBs used for transmitting and receiving the PSFCH, information indicating the number of cyclic shift pairs used for PSFCH transmission that can be multiplexed into one PRB, information indicating the number of PSFCH resources available for multiplexing HARQ-ACK information, information indicating a scrambling ID for sequence hopping of the PSFCH, information indicating the interval of the PSFCH resources, and information indicating the minimum time gap between the PSSCH and the PSFCH.

[0098] The information indicating parameters of sidelink transmission power control includes information indicating parameters used for transmission power control based on sidelink path loss and information indicating parameters used for transmission power control based on downlink path loss.

[0099] The information indicating the sidelink synchronization configuration includes information indicating whether the sidelink synchronization configuration is used for transmitting and receiving the sidelink synchronization signal when the terminal device 1 is synchronized to the GNSS, or whether the sidelink synchronization configuration is used for transmitting and receiving the sidelink synchronization signal when the terminal device 1 is synchronized to the base station device 3, information indicating the type of hysteresis when evaluating the synchronization reference terminal device 1, information indicating the number of sidelink SSB transmissions in one sidelink SSB period, information indicating the period and start position of the sidelink SSB, information indicating the ID of the sidelink synchronization signal, It includes information indicating a threshold value used to determine whether to send a drink synchronization signal.

[0100] The information indicating the configuration of the sidelink radio bearer includes information indicating whether the terminal device 1 is a synchronization source, information indicating a parameter used to detect a sidelink radio link failure, information indicating a frequency used for the sidelink, information indicating a configuration for a method (mode 1) in which the base station device 3 indicates scheduling information to the terminal device 1, information indicating a configuration for a method (mode 2) in which the terminal device 1 autonomously selects resources, information indicating a configuration for CSI reporting, information indicating whether sidelink scheduling is used, information indicating the configuration of sidelink scheduling requests, information indicating the priority of sidelink SSB transmission and reception, information indicating the RLC mode, information indicating the configuration of sidelink logical channels, information indicating the configuration of sidelink RLC, etc. Includes.

[0101] The information indicating the frequency at which the sidelink is used further includes information indicating the subcarrier spacing, information indicating the frequency position of the sidelink SSB, information indicating synchronization priority, and the like.

[0102] The information indicating the configuration for the method (mode 1) in which the base station device 3 indicates scheduling information to the terminal device 1 includes information indicating an RNTI used for scrambling the CRC of a DCI format (e.g., DCI format 3_0) including scheduling information for the terminal device 1, information indicating a sidelink MAC configuration, and information indicating a sidelink Configured Grant configuration. The information indicating the sidelink MAC configuration includes information indicating a sidelink BSR configuration and information indicating a threshold used to determine the priority of sidelink transmission and uplink transmission. The information indicating the sidelink Configured Grant configuration includes information indicating an ID for identifying a sidelink Configured Grant, information indicating a frequency resource of the sidelink Configured Grant, information indicating a time resource of the sidelink Configured Grant, information indicating a HARQ process ID of the sidelink Configured Grant, information indicating resources used for sidelink HARQ-ACK transmission, information indicating a period of the sidelink Configured Grant, information indicating a resource pool to which the sidelink Configured Grant is applied, information indicating a start subchannel of the sidelink Configured Grant, and the like.

[0103] The information indicating the configuration for the method (mode 2) in which the terminal device 1 autonomously selects resources includes information indicating PSSCH transmission parameters such as MCS, subchannel number, number of retransmissions, and transmission power parameters, information indicating the probability used for resource selection, and information indicating a threshold value for RSRP used for resource selection.

[0104] The information indicating the configuration of the sidelink logical channel includes information indicating a sidelink logical channel priority, information indicating a configuration of a scheduling request applicable to the sidelink logical channel, information indicating a bit rate, information indicating a sidelink bucket size interval, information indicating whether to apply HARQ feedback to the sidelink logical channel, information indicating a subcarrier spacing applied to the resource to which the sidelink logical channel is mapped, information indicating the maximum physical channel interval of the resource to which the sidelink logical channel is mapped, information indicating a sidelink logical channel group ID, etc.

[0105] The information indicating the configuration of the sidelink measurement includes information indicating the frequency at which the sidelink measurement is performed, information indicating a filter coefficient to be applied to the sidelink measurement, information indicating the interval for reporting the sidelink measurement results, information indicating a threshold value used for deciding whether to report the sidelink measurement results, information indicating the interval used for deciding whether to report the sidelink measurement results, etc.

[0106] The terminal device 1 transmits information regarding the side link to the base station device 3 by RRC signaling. The terminal device 1 notifies the user of the sidelink communication. Information indicating parameters for requesting link transmission resources, information on sidelink capabilities, information indicating the cast type (broadcast, groupcast, unicast) for requesting sidelink resources, information indicating destination identity, information on sidelink QoS information indicating the RLC mode; and a list of synchronization references used by the terminal device 1. This includes information indicating the following.

[0107] A media access control layer processor (MAC layer processor) 35 controls activation of a secondary cell. The medium access control layer processing unit (MAC layer processing unit) 35 generates MAC CEs (SCell Activation / Deactivation MAC CEs) instructing activation / deactivation of secondary cells for multiple serving cells configured by the radio resource control layer processing unit 36. The medium access control layer processing unit (MAC layer processing unit) 35 generates MAC CEs instructing activation / deactivation of secondary cells for multiple serving cells configured by the radio resource control layer processing unit 36. The medium access control layer processor (MAC layer processor) 35 performs the transfer of the serving cell. The serving cell is deactivated by measuring with a timer whether or not scheduling has been performed for a certain period of time, and the wireless transmitting / receiving unit 30 is controlled.

[0108] The functions of the wireless transceiver 30 are similar to those of the wireless transceiver 10, and therefore a description thereof will be omitted as appropriate. The wireless transceiver 30 performs physical layer processing. Here, the physical layer processing may include some or all of the following: generation of a baseband signal of a physical channel, generation of a baseband signal of a physical signal, detection of information transmitted by the physical channel, and detection of information transmitted by the physical signal. Furthermore, the physical layer processing may include mapping processing of a transport channel to a physical channel. Here, the baseband signal is also referred to as a time-continuous signal.

[0109] The radio transmission / reception unit 30 may perform one or both of a demodulation process and a decoding process. The radio transmission / reception unit 30 may deliver a transport block of information detected based on the demodulation process and the decoding process for the received physical signal to a higher layer on the UL-SCH. For example, the radio transmission / reception unit 30 may generate a baseband signal of a downlink physical channel. Here, the transport block delivered from a higher layer on the DL-SCH may be arranged in the downlink physical channel. For example, the radio transmission / reception unit 30 may generate a baseband signal of a downlink physical signal.

[0110] The radio transmission / reception unit 30 may perform some or all of the modulation process, the encoding process, and the transmission process. The radio transmission / reception unit 30 may generate a physical signal based on some or all of the encoding process, the modulation process, and the baseband signal generation process for the transport block. The radio transmission / reception unit 30 may place the physical signal in a certain BWP. The radio transmission / reception unit 30 , and may transmit the generated physical signal. For example, the radio transceiver unit 30 may attempt to detect information transmitted by an uplink physical channel. Here, a transport block of the information transmitted by the uplink physical channel may be delivered to a higher layer on an UL-SCH. For example, the radio transceiver unit 30 may attempt to detect information transmitted by an uplink physical signal.

[0111] The wireless transmission / reception unit 30 grasps a search space (SS) configured in the terminal device 1. The wireless transmission / reception unit 30 grasps a search space in a control resource set configured in the terminal device 1. The wireless transmission / reception unit 30 grasps PDCCH candidates monitored in the terminal device 1, The radio transmission / reception unit 30 grasps the search area of ​​each PDCCH candidate monitored in the terminal device 1. It is understood which control channel element the PDCCH candidate is composed of (the PDCCH candidate is composed of The radio transceiver 30 includes an SS grasping unit, which grasps the SS configured in the terminal device 1. The SS grasping unit grasps one or more PDCCH candidates in a control resource set configured as a search space of the terminal device. grasps the PDCCH candidates (the number of PDCCH candidates, the numbers of the PDCCH candidates) configured in the search area of ​​the control resource set of the terminal device 1.

[0112] The SS grasping unit grasps the configuration of the search space in the control resource set (the number of PDCCH candidates, the OFDM symbols of the PDCCH candidates, and the aggregation level of the PDCCH candidates). The transmission unit (transmission processing unit) of the wireless transmission / reception unit 30 transmits the PDCCH candidates in the search space of the control resource set to the terminal device 1. The PDCCH is transmitted using this.

[0113] A transmitter (also referred to as a transmission processor) of the base station device 3 transmits the PDCCH. The transmission processing unit of the base station device 3 transmits the PDCCH using PDCCH candidates monitored in the terminal device 1. The transmission processing unit of the base station device 3 transmits the PDCCH using resources corresponding to the PDCCH candidates in a search area set for the terminal device 1. The transmission processing unit of the base station device 3 transmits the PDCCH using resources corresponding to the PDCCH candidates in a search area set for the terminal device 1. The PDCCH is transmitted using PDCCH candidates in the search area where filtering is performed.

[0114] The receiving unit (also referred to as a receiving processing unit) of the base station device 3 receives the HARQ-ACK. The receiving processing unit of the base station device 3 receives the HARQ-ACK for the PDSCH. The receiving processing unit of the base station device 3 The reception processing unit of the base station device 3 receives the HARQ-ACK for the PDSCH of the downlink frequency band (cell, component carrier, carrier) managed by the base station device 3. do.

[0115] The receiving unit of the base station device 3 receives a sidelink HARQ-ACK from the terminal device 1. The terminal device 1 receives the sidelink HARQ-ACK from the PSFCH received from the terminal device 1, which is the communication partner, via the sidelink. The HARQ-ACK information is transmitted to the base station device 3 using the PUCCH.

[0116] The wireless transceiver 30 stops various reception processes and various transmission processes in the deactivated serving cell. For example, the wireless transceiver 30 stops transmitting the PDCCH in the deactivated serving cell. For example, the radio transceiver unit 30 is deactivated. For example, the radio transceiver unit 30 stops receiving the SRS in the serving cell that has been set. The reception of the PUSCH in the deactivated serving cell is stopped.

[0117] The RF unit 32 may convert the signal received via the antenna unit 31 into a baseband signal and remove unnecessary frequency components. The RF unit 32 outputs the baseband signal to the baseband unit 33.

[0118] The baseband unit 33 may digitize the baseband signal input from the RF unit 32. The baseband unit 33 may remove a portion corresponding to a CP (Cyclic Prefix) from the digitized baseband signal. Alternatively, a fast Fourier transform (FFT) may be performed on the subband signal to extract a frequency domain signal.

[0119] The baseband unit 33 may generate a baseband signal by performing an Inverse Fast Fourier Transform (IFFT) on the physical signal. The baseband unit 33 may add a CP to the generated baseband signal. The baseband unit 33 may convert the baseband signal to which the CP has been added into an analog signal. The baseband unit 33 may output the analogized baseband signal to the RF unit 32.

[0120] The RF unit 32 removes unnecessary frequency components from the baseband signal input from the baseband unit 33. The RF unit 32 may remove the baseband signal from the antenna unit 31. The RF unit 32 may up-convert the baseband signal to a carrier frequency to generate an RF signal. The RF unit 32 may transmit the RF signal via the antenna unit 31. The RF unit 32 may also have a function of controlling transmission power.

[0121] Each of the units denoted by reference numerals 10 to 16 in the terminal device 1 may be configured as a circuit. Each of the units denoted by reference numerals 30 to 36 in the base station device 3 may be configured as a circuit.

[0122] Hereinafter, physical channels and physical signals according to various aspects of the present embodiment will be described.

[0123] The physical signal is a general term for the downlink physical channel, the downlink physical signal, the uplink physical channel, and the uplink physical channel. The physical channel is a general term for the downlink physical channel and the uplink physical channel. The physical signal is a general term for the downlink physical signal and the uplink physical signal.

[0124] An uplink physical channel may correspond to a set of resource elements carrying information generated in a higher layer. An uplink physical channel is a physical channel used in an uplink component carrier. An uplink physical channel may be transmitted by the radio transceiver unit 10. An uplink physical channel may be received by the radio transceiver unit 30. In a wireless communication system according to an aspect of the present embodiment, at least some or all of the following uplink physical channels are used: ·PUCCH (Physical Uplink Control CHannel) ·PUSCH (Physical Uplink Shared CHannel) ·PRACH(Physical Random Access CHannel)

[0125] The PUCCH transmits uplink control information (UCI). The uplink control information may be placed in the PUCCH. The wireless transmission / reception unit 10 may transmit a PUCCH in which the uplink control information is arranged. The receiving unit 30 may receive a PUCCH in which the uplink control information is arranged.

[0126] Uplink control information (uplink control information bit, uplink control information sequence, uplink control information type) is channel state information (CSI), schedule Scheduling Request (SR), HARQ-ACK (Hybrid Automatic Repeat The uplink control information may include a part or all of the request ACKnowledgement (SACK) information. Note that the uplink control information may include information that is not described above.

[0127] The channel state information is also referred to as a channel state information bit or a channel state information sequence. The scheduling request is also referred to as a scheduling request bit or a scheduling request sequence. The HARQ-ACK information is also referred to as a HARQ-ACK information bit or a HARQ-ACK information sequence.

[0128] The HARQ-ACK information may be composed of HARQ-ACK bits corresponding to one transport block (TB). The HARQ-ACK bits may indicate an acknowledgement (ACK) or a negative-acknowledgement (NACK) corresponding to the transport block. An ACK may indicate that the decoding of the transport block has been successfully completed. A NACK may indicate that the decoding of the transport block has not been successfully completed. The HARQ-ACK information may include one or more HARQ-ACK bits.

[0129] HARQ-ACK for a transport block is also called HARQ-ACK for a PDSCH. Here, "HARQ-ACK for PDSCH" may indicate HARQ-ACK for a transport block included in the PDSCH.

[0130] A scheduling request may be used to request UL-SCH resources for an initial transmission. The scheduling request bit is either positive SR or MAY be used to indicate either a negative SR. The scheduling request bit indicating a positive SR is also referred to as "a positive SR is transmitted (communicated)". A positive SR may indicate that UL-SCH resources for initial transmission are requested by the terminal device 1. The scheduling request bit indicating a negative SR is also referred to as "a negative SR is transmitted (communicated)". A negative SR may indicate that UL-SCH resources for initial transmission are not requested by the terminal device 1.

[0131] The channel state information is the Channel Quality Indicator (CQI), The CQI may include some or all of a Precoder Matrix Indicator (PMI) and a Rank Indicator (RI). Or, it is an index related to the quality of the physical channel, and PMI is an index related to the precoder The RI is an index related to the transmission rank (or the number of transmission layers).

[0132] The channel state information is an indicator regarding the reception state of a physical signal (e.g., CSI-RS) used for channel measurement. The value of the channel state information may be determined by the terminal device 1 based on the reception state assumed by the physical signal used for channel measurement. The channel measurement may include an interference measurement.

[0133] The PUCCH may be accompanied by a certain PUCCH format, where the PUCCH format may be a format of a physical layer processing of the PUCCH, and the PUCCH format may be a format of information transmitted using the PUCCH.

[0134] The PUSCH carries uplink control information and / or transport blocks. The PUSCH may be transmitted to convey uplink control information and The PUSCH may be used to carry one or both of the transport blocks. The PUSCH may be used to transmit at least some or all of the port blocks, HARQ-ACKs, channel state information, and scheduling requests. The PUSCH is used at least to transmit the access message 3. The terminal device 1 may transmit the uplink control information and / or the PUSCH in which the transport block is arranged. The station device 3 may receive the uplink control information and / or the PUSCH in which the transport block is arranged.

[0135] PRACH is the index of the random access preamble (random access message The terminal device 1 may transmit the PRACH. The base station device 3 may receive the PRACH. The terminal device 1 may transmit a random access preamble on the PRACH. The base station device 3 may transmit the random access preamble on the PRACH. may be received.

[0136] The uplink physical signal may correspond to a set of resource elements. The uplink physical signal does not have to be used to transmit information generated in a higher layer. The uplink physical signal may be used to transmit information generated in a physical layer. The uplink physical signal may be a physical signal used in an uplink component carrier. The radio transceiver 10 may transmit the uplink physical signal. The radio transceiver 30 may receive an uplink physical signal. In the uplink of the radio communication system according to one aspect of the present embodiment, some or all of the following uplink physical signals may be used. ·UL DMRS(UpLink Demodulation Reference Signal) ·SRS(Sounding Reference Signal) ·UL PTRS(UpLink Phase Tracking Reference Signal)

[0137] UL DMRS is a general term for DMRS for PUSCH and DMRS for PUCCH.

[0138] A set of antenna ports for a DMRS for a PUSCH (a DMRS related to a PUSCH, a DMRS included in a PUSCH, and a DMRS corresponding to a PUSCH) is given based on the set of antenna ports for the PUSCH. For example, for PUSCH The set of antenna ports for the DMRS is the same as the set of antenna ports for the PUSCH. Good too.

[0139] The propagation path of the PUSCH may be estimated from the DMRS for the PUSCH.

[0140] The set of antenna ports for DMRS for PUCCH (DMRS related to PUCCH, DMRS included in PUCCH, DMRS corresponding to PUCCH) may be the same as the set of antenna ports for PUCCH. stomach.

[0141] The propagation path of the PUCCH may be estimated from the DMRS for the PUCCH.

[0142] The downlink physical channel may correspond to a set of resource elements that convey information generated in a higher layer. The downlink physical channel may be a physical channel used in a downlink component carrier. The radio transceiver 30 may transmit the downlink physical channel. The radio transceiver 10 may receive the downlink physical channel. In the downlink of the wireless communication system according to one aspect of the present embodiment, some or all of the following downlink physical channels may be used. ·PBCH(Physical Broadcast Channel) ·PDCCH (Physical Downlink Control Channel) ·PDSCH(Physical Downlink Shared Channel)

[0143] The PBCH is transmitted to carry the Master Information Block (MIB) and / or physical layer control information, which is information generated in the physical layer. The MIB is an RRC message delivered from higher layers on the Broadcast Control CHannel (BCCH).

[0144] PDCCH is used to transmit (transmit) downlink control information (DCI). The downlink control information may be placed in the PDCCH. The terminal device 1 may receive the PDCCH in which the downlink control information is arranged. Alternatively, a PDCCH in which downlink control information is arranged may be transmitted.

[0145] The downlink control information may be transmitted with a DCI format. The DCI format may be interpreted as a format of the downlink control information. The DCI format may be It may also be interpreted as a set of downlink control information set in a certain downlink control information format.

[0146] The base station device 3 may notify the terminal device 1 of the downlink control information by using a PDCCH with a DCI format. Here, the terminal device 1 may notify the terminal device 1 of the downlink control information by using the PDCC Unless otherwise specified, the DCI format and the downlink control information are sometimes described as being equivalent. For example, the base station device 3 may monitor the DCI format The terminal device 1 may transmit the DCI format including the downlink control information to the terminal device 1. In addition, the terminal device 1 may control the radio transmission / reception unit 10 using the downlink control information included in the detected DCI format. It may be controlled.

[0147] The downlink control information may include at least one of a downlink grant (DL grant) and an uplink grant (UL grant). The DCI format used for scheduling the PUSCH is also called the uplink DCI format. This is also referred to as downlink assignment (DL assignment) or downlink allocation (DL allocation).

[0148] DCI format 0_0, DCI format 0_1, DCI format 1_0, and DCI format The uplink DCI format is a general term for DCI format 0_0, DCI format 0_1, etc. The downlink DCI format is a general term for DCI format 1_0, DCI format 1_1, etc.

[0149] DCI format 0_0 is used for scheduling PUSCH allocated to a certain cell. DCI format 0_0 includes at least some or all of 1A to 1E. 1A) Identifier for DCI formats field 1B) Frequency domain resource assignment field 1C) Time domain resource assignment field 1D) Frequency hopping flag field 1E) MCS field (Modulation and Coding Scheme field)

[0150] The DCI format specific field is a DCI format that includes the DCI format specific field. In other words, the DCI format specification field may be included in each of the uplink DCI format and the downlink DCI format. The DCI format specific field included in may indicate 0.

[0151] The frequency domain resource allocation field included in the DCI format 0_0 is This may be used to indicate the allocation of frequency resources for the PUSCH scheduled by the metric 0_0.

[0152] The time domain resource allocation field included in DCI format 0_0 is This may be used to indicate the allocation of time resources for the PUSCH scheduled by mat 0_0.

[0153] The frequency hopping flag field may be used to indicate whether frequency hopping is applied to the PUSCH scheduled by the DCI format 0_0. stomach.

[0154] The MCS field included in the DCI format 0_0 is The modulation scheme for the PUSCH to be scheduled and the DCI format 0_1 The metric may be used to indicate one or both of the target coding rates to be trained. The target coding rate is the target coding rate for the transport block placed on the PUSCH. The size of the transport block (TBS) allocated to the PUSCH may be determined based on the target coding rate and a part of the modulation scheme for the PUSCH. Or it may be determined based on all of them.

[0155] DCI format 0_0 may not include a field used for a CSI request. DCI format 0_0 may not include a carrier indicator field. DCI format 0_0 may not include a BWP field.

[0156] DCI format 0_1 ​​is used for scheduling PUSCH allocated to a certain cell. DCI format 0_1 ​​consists of some or all of fields 2A to 2H. 2A) DCI format specific fields 2B) Frequency domain resource allocation field 2C) Time Domain Resource Allocation Field 2D) Frequency hopping flag field 2E) MCS Field 2F) CSI request field 2G) BWP field 2H) UL DAI field (downlink assignment index)

[0157] The DCI format specific field included in DCI format 0_1 ​​may indicate 0. .

[0158] The frequency domain resource allocation field included in the DCI format 0_1 ​​is This may be used to indicate the allocation of frequency resources for the PUSCH scheduled by the metric 0_1.

[0159] The time domain resource allocation field included in DCI format 0_1 ​​is This may also be used to indicate the allocation of time resources for PUSCH scheduled by mat 0_1.

[0160] The MCS field included in the DCI format 0_1 ​​is The modulation scheme for the PUSCH to be scheduled and the DCI format 0_1 This is used to indicate one or both of the target coding rates for the PUSCH to be queued. This may also be done.

[0161] The CSI request field may be used to indicate reporting of CSI.

[0162] The BWP field of DCI format 0_1 ​​is scheduled by the DCI format 0_1. It may be used to indicate the uplink BWP in which the PUSCH to be routed is located. Format 0_1 ​​may or may not involve a change in the active uplink BWP. The terminal device 1 detects DCI format 0_1 ​​used for scheduling the PUSCH. Based on this, the uplink BWP in which the PUSCH is arranged may be recognized.

[0163] When the DCI format 0_1 ​​includes a carrier indicator field, the carrier indicator field indicates the uplink component carrier on which the PUSCH is arranged. The terminal device 1 may be used to indicate a serving cell. Based on detecting DCI format 0_1 ​​in the downlink component carrier of a serving cell, the terminal device 1 may detect that the PUSCH scheduled by the DCI format 0_1 ​​is included in the DCI format 0_1. It may be appreciated that the UE may be located on the uplink component carrier of the serving cell as indicated by the carrier indicator field included in the UE.

[0164] If DCI format 0_1 ​​does not include a carrier indicator field, The serving cell to which the uplink component carrier on which the PUSCH scheduled by the DCI format 0_1 ​​is arranged belongs has a PDCCH including the DCI format 0_1 ​​arranged. The terminal device 1 may be the same as the serving cell of a downlink component carrier. Based on detecting DCI format 0_1, it may be recognized that the PUSCH scheduled by the DCI format 0_1 ​​is to be placed on the uplink component carrier of the certain serving cell.

[0165] The UL DAI field is at least used to indicate the transmission status of the PDSCH. When a dynamic HARQ-ACK codebook is used, the size of the UL DAI field may be 2 bits. The UL DAI field indicates the size of the HARQ-ACK codebook transmitted in the PUSCH. The UL DAI field indicates the number of HARQ-ACKs included in the HARQ-ACK codebook transmitted in the PUSCH. The UL DAI field indicates the number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted in the PUSCH. The UL DAI field indicates the number of PDSCHs and SPS releases in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted in the PUSCH.

[0166] The UL DAI field may indicate a value to which a modulo operation has been applied. An example in which the UL DAI field is 2 bits will be described. When the number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted on the PUSCH is 0, the UL DAI field indicates "00". The HARQ-ACK codebook transmitted on the PUSCH includes the corresponding HARQ-ACK. If the number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted on the PUSCH is 2, the UL DAI field is set to “01”. If the number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted on the PUSCH is three, the UL DAI field is set to “11”. The number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted on the PUSCH is If the number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted on the PUSCH is 5, the UL DAI field is set to “00”. In this example, the UL DAI field is set to "01". If the number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted on the PUSCH is six, "10" is indicated as the UL DAI field. If the number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted on the PUSCH is seven, "11" is indicated as the UL DAI field. In this example, the number "4" is set to "01" for the number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted on the PUSCH. A modulo operation using ' is performed.

[0167] The terminal device 1 interprets the UL DAI field taking into account the total number of received PDSCHs. For example, terminal device 1 receives four PDSCHs and receives a UL DAI field indicating “00”. In this case, the terminal device 1 interprets that the number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted in the PUSCH, which is indicated in the UL DAI field, is four. For example, the terminal device 1 receives three PDSCHs and the UL DAI field indicates “00”. In this case, the terminal device 1 receives the PUSCH transmitted in the UL DAI field. The number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook is interpreted as being four, and it is determined that reception of one PDSCH has been missed.

[0168] DCI format 1_0 is used for scheduling PDSCH allocated to a certain cell. DCI format 1_0 is composed of some or all of 3A to 3F. 3A) DCI format specific fields 3B) Frequency domain resource allocation field 3C) Time Domain Resource Allocation Field 3D) MCS field 3E) PDSCH_HARQ feedback timing indicator field 3F) PUCCH resource indicator field

[0169] The DCI format specific field included in DCI format 1_0 may indicate 1. .

[0170] The frequency domain resource allocation field included in the DCI format 1_0 is FIG. 1 shows the allocation of frequency resources for PDSCH scheduled by the LTE. It may also be used for

[0171] The time domain resource allocation field included in DCI format 1_0 is To show the allocation of time resources for PDSCH scheduled by the mat It may also be used in.

[0172] The MCS field included in the DCI format 1_0 may be used to indicate one or both of a modulation scheme for a PDSCH scheduled by the DCI format and a target coding rate for a PDSCH scheduled by the DCI format. The target coding rate is the target for the transport blocks placed in the PDSCH. The size of the transport block (TBS) allocated to the PDSCH may be determined based on the target coding rate and the modulation scheme for the PDSCH. It may be determined based on one or both of the above.

[0173] The PDSCH_HARQ feedback timing indication field is set to the last OFDM symbol of the PDSCH. The offset from the slot containing the first OFDM symbol of the PUCCH to the slot containing the first OFDM symbol of the PUCCH. It may be used to indicate the timing of the PDSCH to HARQ feedback. The indication field may be a field indicating the timing K1. When the index of a slot including a PUCCH or PUSCH including at least a HARQ-ACK corresponding to a transport block included in the PDSCH is slot n, the index of a slot including the last OFDM symbol of the PDSCH may be n+K1. If the slot index is slot n, the transport block included in the PDSCH The index of the slot including the first OFDM symbol of the PUCCH or the first OFDM symbol of the PUSCH including at least the HARQ-ACK corresponding to the lock may be n+K1.

[0174] The PDSCH_HARQ feedback timing indication field is used for the PDSCH-to-HARQ feedback This may also be referred to as a PDSCH-to-HARQ_feedback timing indicator field, or a HARQ indication field.

[0175] The PUCCH resource indication field may be used to indicate the resource of the PUCCH.

[0176] DCI format 1_1 is used for scheduling PDSCH allocated to a certain cell. DCI format 1_1 is composed of some or all of 4A to 4I. 4A) DCI format specific fields 4B) Frequency domain resource allocation field 4C) Time Domain Resource Allocation Field 4E) MCS Field 4F) PDSCH_HARQ feedback timing indication field 4G) PUCCH resource indication field 4H) BWP Field 4I) Career Indicator Field

[0177] The DCI format specific field included in DCI format 1_1 may indicate 1. .

[0178] The frequency domain resource allocation field included in the DCI format 1_1 is This may be used to indicate the allocation of frequency resources for the PDSCH scheduled by the mobile station 1_1.

[0179] The time domain resource allocation field included in the DCI format 1_1 is It may also be used to indicate the allocation of time resources for the PDSCH scheduled by mat 1_1.

[0180] The MCS field included in DCI format 1_1 is scheduled by the DCI format 1_1. The modulation scheme for the PDSCH to be scheduled and the DCI format 1_1 This is used to indicate one or both of the target coding rates for the PDSCH to be programmed. This may also be done.

[0181] If the DCI format 1_1 includes a PDSCH_HARQ feedback timing indication field, the PDSCH_HARQ feedback timing indication field is From the slot containing the first OFDM symbol of PUCCH to the slot containing the first OFDM symbol of PUCCH It may be used to indicate the offset. If DCI format 1_1 does not include the PDSCH_HARQ feedback timing indication field, the last OFDM symbol of the PDSCH is included. This indicates the offset from the slot containing the first OFDM symbol of the PUCCH to the slot containing the first OFDM symbol of the PUCCH. The parameters may be provided by the RRC layer.

[0182] The PUCCH resource indication field may be used to indicate the resource of the PUCCH.

[0183] The BWP field of DCI format 1_1 is scheduled by the DCI format 1_1. It may be used to indicate the downlink BWP in which the PDSCH to be routed is located. Format 1_1 may or may not involve a change in the active downlink BWP. The terminal device 1 detects DCI format 1_1 used for scheduling the PDSCH. Based on this, the downlink BWP in which the PDSCH is arranged may be recognized.

[0184] The DCI format 1_1 that does not include a BWP field may be a DCI format for scheduling a PDSCH without changing an active downlink BWP. The terminal device 1 detects the DCI format 1_1 that is used for scheduling a PDSCH and does not include a BWP field, and determines whether or not to switch an active downlink BWP. Alternatively, the PDSCH may be recognized as being received without switching.

[0185] When the DCI format 1_1 includes a carrier indicator field, the carrier indicator field is used to indicate a serving cell of a downlink component carrier on which a PDSCH scheduled by the DCI format 1_1 is arranged. The terminal device 1 may detect the DCI format 1_1 in the downlink component carrier of a serving cell, and may determine whether the PDSCH scheduled by the DCI format 1_1 is a carrier indicator included in the DCI format 1_1. The QoS field indicates that the QoS is placed on the downlink component carrier of the serving cell. It is good to recognize that

[0186] If DCI format 1_1 does not include the carrier indicator field, The downlink component carrier on which the PDSCH scheduled by the DCI format 1_1 is arranged is a downlink component carrier on which the PDCCH including the DCI format 1_1 is arranged. The terminal device 1, based on detecting the DCI format 1_1 in a certain downlink component carrier, recognizes that the PDSCH scheduled by the DCI format 1_1 is to be arranged in the downlink component carrier. You may recognize it.

[0187] A downlink grant is used for the scheduling of one PDSCH in one serving cell. The downlink grant is at least used for scheduling the PDSCH in the same slot in which the downlink grant is transmitted. The downlink grant may be used for scheduling the PDSCH in a slot different from the slot in which the downlink grant is transmitted. is used for scheduling at least one PUSCH in the serving cell.

[0188] Note that various DCI formats contain additional fields in addition to those mentioned above. A field indicating the cumulative number of transmitted PDCCHs (C-DAI: Counter Downlink Assignment Index field) may be included. A field indicating the total number of transmitted PDCCHs (T-DAI: Total Downlink Assignment Index field) may be included.

[0189] The PDSCH may be transmitted to transmit a transport block. The PDSCH may be used to transmit a transport block. The transport block may be arranged in the PDSCH. The base station device 3 may transmit the PDSCH in which the transport block is arranged. The terminal device 1 may receive the PDSCH in which the transport block is arranged. Good too.

[0190] The downlink physical signal may correspond to a set of resource elements. The downlink physical signal may not be used to transmit information generated in a higher layer. The downlink physical signal may be used to transmit information generated in a physical layer. The downlink physical signal may be a physical signal used in a downlink component carrier. The radio transceiver 10 may receive the downlink physical signal. The radio transceiver 30 may transmit the downlink physical signal. In the downlink of the wireless communication system according to one aspect of the present embodiment, at least some or all of the following downlink physical signals may be used. ·Synchronization signal (SS) ·DL DMRS(DownLink DeModulation Reference Signal) ·CSI-RS(Channel State Information-Reference Signal) ·DL PTRS(DownLink Phase Tracking Reference Signal)

[0191] The synchronization signal is used by the terminal device 1 to synchronize the frequency domain and / or the time domain of the downlink. The synchronization signal includes a PSS (Primary Synchronization Signal) and and SSS (Secondary Synchronization Signal).

[0192] The SS block (SS / PBCH block) is a block that contains at least some or all of the PSS, SSS, and PBCH. It is composed of at least

[0193] The antenna ports for the PSS, SSS, PBCH, and DMRS for the PBCH may be the same.

[0194] The PBCH on which the PBCH symbol is transmitted in a certain antenna port is a DMRS for the PBCH that is arranged in a slot to which the PBCH is mapped, and the SS / PBCH block in which the PBCH is included The PBCH may be estimated by the DMRS for the PBCH included in

[0195] DL DMRS is the sum of DMRS for PBCH, DMRS for PDSCH, and DMRS for PDCCH. It is a title.

[0196] A set of antenna ports for a DMRS for a PDSCH (DMRS related to a PDSCH, DMRS included in a PDSCH, DMRS corresponding to a PDSCH) is given based on the set of antenna ports for the PDSCH. For example, the set of antenna ports of a DMRS for a PDSCH may be the same as the set of antenna ports for the PDSCH.

[0197] The propagation path of a PDSCH may be estimated from the DMRS for that PDSCH. A set of resource elements on which a DMRS symbol is transmitted and the symbol of the DMRS for the PDSCH are transmitted. In a case where a set of resource elements on which a symbol of a PDSCH is transmitted is included in the same precoding resource group (PRG), the PDSCH on which a symbol of the PDSCH is transmitted in a certain antenna port may be estimated by the DMRS for the PDSCH.

[0198] The antenna port of the DMRS for the PDCCH (DMRS related to the PDCCH, DMRS included in the PDCCH, DMRS corresponding to the PDCCH) may be the same as the antenna port for the PDCCH.

[0199] The propagation path of a PDCCH may be estimated from the DMRS for that PDCCH. A set of resource elements on which the DMRS symbol for the PDCCH is transmitted and If the same precoder is applied (is assumed to be applied, is assumed to be applied) in the set of resource elements on which the symbols of the PDCCH on a certain antenna port are transmitted, the PDCCH on which the symbols of the PDCCH on that antenna port are transmitted may be estimated by the DMRS for that PDCCH.

[0200] The BCH (Broadcast CHannel), the UL-SCH (Uplink-Shared CHannel), and the DL-SCH (Downlink-Shared CHannel) are transport channels.

[0201] The BCH of the transport layer may be mapped to the PBCH of the physical layer. The transport block delivered from higher layers on the BCH of the transport layer is mapped to the PBCH of the physical layer. Also, the UL-SCH of the transport layer may be mapped to the PUSCH of the physical layer. stomach.

[0202] The transport layer may apply Hybrid Automatic Repeat reQuest (HARQ) to the transport block.

[0203] BCCH (Broadcast Control CHannel), CCCH (Common Control CHannel), and DCCH (Dedicated Control CHannel) are logical channels. For example, BCCH uses MIB. The CCCH may be used to deliver an RRC message including RRC parameters common to a plurality of terminal devices 1, or an RRC message including system information. The CCCH may also be used to transmit an RRC message including RRC parameters common to a plurality of terminal devices 1. Here, the CCCH may be used to transmit an RRC message including RRC parameters common to a plurality of terminal devices 1, for example. The DCCH may be used for a terminal device 1. Also, the DCCH may be used for an RRC message dedicated to a certain terminal device 1. Here, the DCCH may be used to transmit a RRC connected message. It may also be used for terminal device 1.

[0204] The BCCH may be mapped to the BCH or DL-SCH. RRC messages that contain system information other than the MIB may be delivered on the BCH. In addition, the CCCH is mapped to either the DL-SCH or the UL-SCH. In other words, the RRC message that is mapped to the CCCH may be delivered on either the DL-SCH or the UL-SCH. In addition, the DCCH may be mapped to the DL-SCH or the UL-SCH, i.e., an RRC message mapped to the DCCH may be delivered to the DL-SCH or the UL-SCH.

[0205] The UL-SCH may be mapped to the PUSCH. The DL-SCH may be mapped to the PDSCH. may be mapped to the PBCH.

[0206] The medium access control layer processing unit 15 may implement a random access procedure.

[0207] For example, downlink control information including a downlink grant or an uplink grant is transmitted and received on a PDCCH including a Cell-Radio Network Temporary Identifier (C-RNTI).

[0208] One physical channel may be mapped to one serving cell. One physical channel may be mapped to one BWP configured on one carrier included in one serving cell. It may be possible to

[0209] One or more control resource sets (CORESET: Control Resource SET) may be configured in the terminal device 1. The terminal device 1 transmits a PDCCH in one or more control resource sets. Here, monitoring the PDCCH in one or more control resource sets may include monitoring one or more PDCCHs corresponding to each of the one or more control resource sets. Note that the PDCCH may include one or more PDCCH candidates and The monitoring of the PDCCH may include a set of PDCCH candidates and / or a set of PDCCH candidates. and / or monitoring and detecting a DCI format transmitted via the PDCCH.

[0210] A plurality of control resource sets may be configured in the terminal device 1, and an index (control resource set index) may be assigned to each control resource set. One or more control channel elements (CCEs) may be configured in the control resource set, and an index (CCE index) may be assigned to each CCE.

[0211] The set of PDCCH candidates monitored by the terminal device 1 is defined in terms of a search space. The set of candidates is given by a search space.

[0212] The search space may be configured to include one or more PDCCH candidates of one or more aggregation levels. The aggregation level of the PDCCH candidates is determined based on the number of CCEs constituting the PDCCH. The PDDCH candidates may be mapped to one or more CCEs.

[0213] The search area set may be configured to include at least one or more search areas. An index (search area index) may be assigned to each search area.

[0214] Each of the search space sets may be associated with at least one control resource set. Each of the search space sets may be included in one control resource set. For each of the search space sets, an index of the control resource set associated with the search space set may be given.

[0215] The terminal device 1 performs blind searching for PDCCH candidates included in a search space in a control resource set. By transmitting the PDCCH and / or DCI for the terminal device 1, it is possible to detect the PDCCH and / or DCI for the terminal device 1.

[0216] In various aspects of the present embodiment, unless otherwise specified, the number of resource blocks refers to the number of resource blocks in the frequency domain.

[0217] The terminal device 1 transmits uplink control information (UCI) to the base station device 3. The terminal device 1 may multiplex the UCI onto the PUCCH and transmit the UCI. The terminal device 1 may multiplex the UCI onto the PUSCH and transmit the UCI. The UCI may include at least one of downlink channel state information (CSI), a scheduling request (SR) indicating a request for a PUSCH resource, and a hybrid automatic repeat request ACKnowledgement (HARQ-ACK) for downlink data (Transport block, Medium Access Control Protocol Data Unit: MAC PDU, Downlink-Shared Channel: DL-SCH, Physical Downlink Shared Channel: PDSCH).

[0218] HARQ-ACK is also known as ACK / NACK, HARQ feedback, HARQ-ACK feedback, HARQ response, HARQ-ACK response, HARQ information, HARQ-ACK information, HARQ control information, and HARQ-ACK control information. It may also be called.

[0219] If the data is successfully decoded, an ACK for that data is generated. If the data is not decoded correctly, a NACK is generated for the data. The HARQ-ACK may include at least HARQ-ACK bits corresponding to at least one transport block. The HARQ-ACK bits may indicate ACK (ACKnowledgement) or NACK (Negative-ACKnowledgement) corresponding to one or more transport blocks. The HARQ-ACK may include a HARQ-ACK codebook including one or more HARQ-ACK bits. The HARQ-ACK bit corresponding to one or more transport blocks may mean that the HARQ-ACK bit corresponds to a PDSCH including the one or more transport blocks.

[0220] The HARQ control for one transport block may be called an HARQ process. One HARQ process identifier may be assigned to each HARQ process. It includes a field indicating a HARQ process number.

[0221] An NDI (New Data Indicator) is indicated in a DCI format for each HARQ process. For example, an NDI field is included in a DCI format (DL assignment) including scheduling information of a PDSCH. The NDI field is 1 bit. The terminal device 1 stores (stores) an NDI value for each HARQ process. The base station device 3 stores (stores) an NDI value for each HARQ process for each terminal device 1. The terminal device 1 detects the NDI field of the detected DCI format. The base station device 3 sets the updated NDI value or the non-updated NDI value in the NDI field of the DCI format and transmits it to the terminal device 1. The terminal device 1 receives the HARQ process identifier field of the detected DCI format. For the HARQ process corresponding to the value, the stored NDI value is updated using the NDI field of the detected DCI format.

[0222] The terminal device 1 receives the DCI based on the value of the NDI field of the DCI format (DL assignment). The terminal device 1 determines whether the received transport block is a new transmission or a retransmission. The terminal device 1 determines whether the received transport block is a new transmission or a retransmission. When the base station device 3 transmits a transport block for new transmission in a certain HARQ process, it toggles the value of the NDI stored for the HARQ process and transmits the toggled NDI to the terminal device 1. When the base station device 3 transmits a transport block for retransmission in a certain HARQ process, it toggles the value of the NDI stored for the HARQ process and transmits the toggled NDI to the terminal device 1. If so, the terminal device 1 does not toggle the value of the NDI stored for that HARQ process, and transmits an untoggled NDI to the terminal device 1. The terminal device 1 compares the value of the NDI field of the detected DCI format with the value of the NDI previously received for a transport block of a certain HARQ process. If it has not been toggled (if it is the same), it is determined that the received transport block is a retransmission, where toggling means switching to a different value.

[0223] The terminal device 1 transmits HARQ-ACK information in a slot indicated by the value of the HARQ indication field included in the DCI format 1_0 or DCI format 1_1 corresponding to PDSCH reception. may be reported to the base station device 3 by using a HARQ-ACK codebook.

[0224] For DCI format 1_0, the value of the HARQ indication field may be mapped to a set of slot numbers (1, 2, 3, 4, 5, 6, 7, 8). For DCI format 1_1, the value of the HARQ indication field may be mapped to a set of slot numbers (1, 2, 3, 4, 5, 6, 7, 8) given by the higher layer parameter dl-DataToUL-ACK. The number of slots indicated based at least on the value of the HARQ indication field may be referred to as HARQ-ACK timing, or K1. For example, a HARQ-ACK indicating a decoding status of a PDSCH (downlink data) transmitted in slot n may be reported (transmitted) in slot n+K1.

[0225] dl-DataToUL-ACK indicates a list of timings of HARQ-ACK for PDSCH. The timing is the slot in which HARQ-ACK for the received PDSCH is transmitted, based on the slot in which the PDSCH is received (or the slot containing the last OFDM symbol to which the PDSCH is mapped). For example, dl-DataToUL-ACK can be 1, 2, or 3. If DL-DataToUL-ACK is a list of one timing, the HARQ indication field is 0 bit. If DL-DataToUL-ACK is a list of two timings, the HARQ indication field The field is 1 bit. If Dl-DataToUL-ACK is a list of 3 or 4 timings, If Dl-DataToUL-ACK is 5, 6, or For example, dl-DataToUL-ACK can be selected from a list of timings with values ​​ranging from 0 to 31. For example, dl-DataToUL-ACK consists of a timing value between 0 and 63. It consists of a list of tags.

[0226] The size of the dl-DataToUL-ACK is defined as the number of elements it contains. para The index of dl-DataToUL-ACK indicates the order (number) of the elements of dl-DataToUL-ACK. For example, if the size of dl-DataToUL-ACK is 8 (L para = 8), the indices of dl-DataToUL-ACK are 1, 2, 3, 4, The value can be 5, 6, 7, or 8. The index of dl-DataToUL-ACK is This may be given, indicated, or indicated by the value indicated by the indication field.

[0227] The terminal device 1 may set the size of the HARQ-ACK codebook according to the size of the dl-DataToUL-ACK. For example, if the dl-DataToUL-ACK consists of eight elements, the size of the HARQ-ACK codebook is eight. For example, if the dl-DataToUL-ACK consists of two elements, the size of the HARQ-ACK codebook is two. Each HARQ-ACK information constituting the HARQ-ACK codebook is HARQ-ACK information for PDSCH reception at each slot timing of the dl-DataToUL-ACK. This type The HARQ-ACK codebook for this group is the Semi-static HARQ-ACK codebook. ) is also called.

[0228] The terminal device 1 may report HARQ-ACK information for PDSCH reception in slot n by using PUCCH transmission and / or PUSCH transmission in slot n+k, where k is the number of times for the PDSCH reception. of the slot indicated by the HARQ indication field included in the corresponding DCI format. Alternatively, if the HARQ indication field is not included in the DCI format, k may be given by the higher layer parameter dl-DataToUL-ACK.

[0229] The terminal device 1 transmits corresponding HARQ-ACK information in a PUCCH of a certain slot. The terminal device 1 determines a set of multiple opportunities for candidate PDSCH reception by dividing multiple slots of slot timing K1 included in dl-DataToUL-ACK into multiple opportunities for candidate PDSCH reception. K1 may be a set of k. For example, if dl-DataToUL-ACK is (1, 2, 3, 4, 5, 6, 7, 8), the PUCCH in slot n receives the PDSCH in slot n-1, the PDSCH in slot n-2, HARQ-ACK information is transmitted for the PDSCH reception in slot n-1, the PDSCH reception in slot n-2, the PDSCH reception in slot n-3, the PDSCH reception in slot n-4, the PDSCH reception in slot n-5, the PDSCH reception in slot n-6, the PDSCH reception in slot n-7, and the PDSCH reception in slot n-8. When the terminal device 1 actually receives a PDSCH in a slot corresponding to a candidate PDSCH reception, the terminal device 1 sets an ACK or NACK as the HARQ-ACK report based on the transport block included in the PDSCH, and when the terminal device 1 does not receive a PDSCH in a slot corresponding to a candidate PDSCH reception, the terminal device 1 sets a NACK as the HARQ-ACK information. do.

[0230] The HARQ-ACK codebook may be based on at least some or all of the set of monitoring occasions for PDCCH, the value of the counter DAI field, The HARQ-ACK codebook may be given based on the value of the UL DAI field. The HARQ-ACK codebook may be given based on the value of the DAI field. The credit may be awarded based on the value of the Total DAI field.

[0231] The size of the HARQ-ACK codebook is determined by the counter DAI frame of the last received DCI format. The Counter DAI field may be set based on the value of the DCI format field. The Counter DAI field is used to count the cumulative number of PDSCHs or transport blocks scheduled until reception of the corresponding DCI format. The size of the HARQ-ACK codebook is the total DAI field of the DCI format. The total DAI field may be set based on the value of the total number of PDSCHs or transport blocks scheduled until the transmission of the HARQ-ACK codebook.

[0232] The terminal device 1 determines a set of PDCCH monitoring opportunities for HARQ-ACK information transmitted in a PUCCH arranged in a slot of index n (slot #n) based on the value of timing K1 and the slot The PDCCH monitoring for HARQ-ACK information to be transmitted in a PUCCH located in a slot with index n may be determined based at least in part or in whole on the value of the slot offset K0. The set of monitoring occasions is also referred to as a set of PDCCH monitoring occasions for slot n. Here, the set of PDCCH monitoring occasions includes M PDCCH monitoring occasions. For example, the slot offset K0 may be indicated based on at least a value of a time domain resource allocation field included in a downlink DCI format. The slot offset K0 is a value indicating the number of slots (slot difference) from a slot including a last OFDM symbol in which a PDCCH including a DCI format including a time domain resource allocation field indicating the slot offset K0 is arranged to a first OFDM symbol of a PDSCH scheduled by the DCI format.

[0233] A PDCCH is detected in a monitoring opportunity of any of the search space sets corresponding to a PDCCH monitoring opportunity. If a DCI format detected in a monitoring opportunity of a search space set corresponding to a certain PDCCH monitoring opportunity triggers (includes triggering information) transmitting HARQ-ACK information in slot n, the terminal device 1 may determine the PDCCH monitoring opportunity as a PDCCH monitoring opportunity for slot n. Also, if a DCI format detected in a monitoring opportunity of a search space set corresponding to a certain PDCCH monitoring opportunity triggers (includes triggering information) transmitting HARQ-ACK information in slot n, the terminal device 1 may determine the PDCCH monitoring opportunity as a PDCCH monitoring opportunity for slot n. When the terminal device 1 does not trigger (does not include triggering information) the PDCCH It is not necessary to determine the monitoring opportunity as the PDCCH monitoring opportunity for slot n. No DCI format is detected in the surveillance opportunity for the search area set corresponding to the surveillance opportunity In this case, the terminal device 1 does not need to determine the PDCCH monitoring opportunity as the PDCCH monitoring opportunity for slot n.

[0234] The counter DAI may be a cumulative number (or a value at least related to the cumulative number) of PDCCHs detected up to a PDCCH monitoring opportunity in a serving cell in M ​​PDCCH monitoring opportunities. The counter DAI may be referred to as a C-DAI. The C-DAI corresponding to the PDSCH may be indicated by a field included in a DCI format used for scheduling the PDSCH. The total DAI is the total DAI that is used up to PDCCH monitoring opportunity m among M PDCCH monitoring opportunities. The cumulative number of PDCCHs detected in The total DAI is called T-DAI (Total Downlink Assignment Index). This may be done.

[0235] The physical signal is also a general term for a sidelink physical channel and a sidelink physical signal. The physical channel is also a general term for a sidelink physical channel. The physical signal is also a general term for a sidelink physical signal.

[0236] A sidelink physical channel may correspond to a set of resource elements carrying information generated in a higher layer. A sidelink physical channel is a physical channel used in a sidelink. The sidelink physical channel may be transmitted by the radio transceiver unit 10. The sidelink physical channel may be received by the radio transceiver unit 10. In a wireless communication system according to one aspect of the present embodiment, at least some or all of the following sidelink physical channels are used. ·PSBCH(Physical Sidelink Broadcast CHannel) ·PSCCH(Physical Sidelink Control CHannel) ·PSSCH(Physical Sidelink Shared CHannel) ·PSFCH (Physical Sidelink Feedback CHannel)

[0237] The PSBCH is specified by the DFN (Direct Frame Number), the TDD UL-DL configuration, the slot index (the slot index of the slot where the PSBCH is placed), and the in-coverage indicator. The base station apparatus 3 transmits the received signal in order to convey the received signal (an identifier indicating whether the transmitting terminal apparatus 1 is located within the coverage of the base station apparatus 3).

[0238] The PSCCH is used to transmit (transmit) sidelink control information (SCI). ) The sidelink control information may be placed in the PSCCH. The terminal device 1 may receive the PSCCH in which the sidelink control information is arranged. 1 may transmit a PSCCH in which the sidelink control information is configured.

[0239] The sidelink control information is transmitted and received in the sidelink control information format (SCI format). The SCI transmitted and received on the PSCCH is st The SCI transmitted and received on the PSSCH is called the 2 stage SCI. nd This is called stage SCI. st The stage SCI format may include SCI format 1-A. SCI format 1-A is a PSSCH and 2 ndUsed for scheduling of stage SCI. SCI format 1-A has a field indicating priority, a field indicating frequency resource allocation, a field indicating time resource allocation, a field indicating resource reservation interval, a field indicating DM RS pattern, and 2 nd A field indicating the stage SCI format (SCI format 2-A, SCI format 2-B), a beta offset (2 nd A field indicating the number of DM RS ports, a field indicating the MCS The MCS table includes a field indicating the MCS table, a field indicating the MCS table, and a field containing a PSFCH overhead indication.

[0240] 2 nd The stage SCI is used for decoding the PSSCH. SCI format 2-A contains the HARQ process number, NDI, RV (Redundancy version), Source ID, Destination ID, HARQ feedback enable / disable indicator, and cast type indicator (unicast). SCI format 2-B includes HARQ process number, NDI, RV, Source ID, Destination ID, HARQ feedback Contains information on enable / disable indicator, Zone ID, and communication range requirement.

[0241] PSSCH is for sidelink data (sidelink transport block, sidelink PDU), 2 nd The PSSCH may be transmitted to convey sidelink data, 2 nd The terminal device 1 may be used to transmit the sidelink data. Ta, 2 ndThe terminal device 1 may transmit the sidelink data, the PSSCH in which the stage SCI is arranged. nd A PSSCH in which a stage SCI is arranged may be received.

[0242] The PSFCH may be used to transmit HARQ-ACK information corresponding to the PSSCH reception. The terminal device 1 may transmit the PSFCH in which the HARQ-ACK information is arranged. A PSFCH in which the information is placed may be received.

[0243] The sidelink physical signal may correspond to a set of resource elements. The sidelink physical signal may not be used to convey information generated in a higher layer. The sidelink physical signal may be used to convey information generated in a physical layer. The radio transceiver 10 may transmit the sidelink physical signal. The radio transceiver 10 may receive the sidelink physical signal. In the sidelink of the wireless communication system according to one aspect of the present embodiment, at least some or all of the following sidelink physical signals may be used. Sidelink Synchronization Signal (S-SS) Side link DM RS Sidelink CSI-RS Side link PT-RS

[0244] The sidelink synchronization signal is used for the terminal device 1 to synchronize the frequency domain and / or the time domain of the sidelink. The sidelink synchronization signal is a general term for an S-PSS (Sidelink Primary Synchronization Signal) and an S-SSS (Sidelink Secondary Synchronization Signal).

[0245] The sidelink DM RS is a general term for the DM RS for the PSBCH, the DM RS for the PSCCH, and the DM RS for the PSSCH. The time domain pattern of the DM RS for the PSSCH is The time domain patterns of the selection candidates are configured for each resource pool.

[0246] The sidelink CSI-RS is a reference signal used for channel measurement of the sidelink. It includes time resource allocation (symbol position to be allocated), frequency resource allocation, number of antenna ports, and number of layers for the CSI-RS. The terminal device 1 reports channel state information measured based on the sidelink CSI-RS using the MAC CE.

[0247] Sidelink PT-RS may be supported only in the high frequency band (FR2). The time and frequency density of the sidelink PT-RS is configured per resource pool.

[0248] A signal for AGC (Access Gain Control) may be used. It may be placed in the first OFDM symbol of the first slot, the second slot, etc.

[0249] The terminal device 1 may use the uplink PUCCH to report information on the sidelink HARA-ACK received from the destination terminal device 1 to the base station device 3. A semi-static HARQ-ACK codebook or a dynamic HARQ-ACK codebook may be used.

[0250] The base station device 3 may notify the terminal device 1 of sidelink scheduling information by using a DCI format. DCI format 3_0 is used for scheduling the PSCCH and PSSCH. DCI format 3_0 is configured to include some or all of the following information: Resource Pool Index Time Gap HARQ process number NDI Subchannel allocation information ·SCI format 1_A field · Timing indicator for feeding back HARQ-ACK of PSSCH corresponding to PSFCH reception · PUCCH resource indicator Configuration Index Sidelink allocation index counter

[0251] The resource pool index indicates a resource pool to be used for the scheduled PSCCH and PSSCH. The time gap indicates the time from when DCI format 3_0 is received until sidelink transmission is performed. The subchannel allocation information indicates the subchannel to be used for the scheduled PSCCH and PSSCH. The SCI format 1_A field indicates the subchannel to be used for the PSCCH when the terminal device 1 transmits the PSCCH. The timing indicator for feeding back HARQ-ACK of PSSCH corresponding to PSFCH reception indicates the timing for the terminal device 1 to feed back HARQ-ACK information acquired by receiving PSFCH from the counterpart terminal device 1 using PUCCH. The PUCCH resource indicator indicates the PUCCH resource used for feeding back HARQ-ACK information acquired by receiving PSFCH. The configuration index indicates the configuration of the sidelink configured grant. The sidelink allocation index counter indicates the number of sidelink allocations that the base station device 3 has assigned to the terminal device 1 within a certain period.

[0252] In order to use unlicensed spectrum, certain restrictions must be met. For example, according to the regulations of the European Telecommunications Standards Institute (ETSI), the 5 GHz band, which is one of the unlicensed spectrum, Regarding the use of the OCB, the occupied channel bandwidth (OCB) containing 99% of the signal power must be 80% or more of the available bandwidth (e.g., system bandwidth, LBT sub-band bandwidth, sub-band bandwidth). In addition, there are restrictions on the maximum transmission power density (Power Spectral Density (PSD)) per given bandwidth (1 MHz). is prescribed.

[0253] To meet such constraints (e.g., OCB rules), unlicensed carriers In this embodiment, transmission is performed using a set of multiple frequency domain resources (also called an interlace or an RB set) at a predetermined frequency interval (interlaced transmission). One interlace may be defined as a set of multiple frequency domain resources allocated at a predetermined frequency interval (for example, 10 RB interval).

[0254] FIG. 5 is a diagram showing an example of interlace mapping according to one aspect of this embodiment. Here, a case where the total available bandwidth is 20 MHz and there are 100 RBs will be described. Interlace #i consists of 10 RBs with index values ​​{i, i+10, i+20, ..., i+90}. One interlace consists of multiple RBs with a frequency interval of 10 RBs. If the total available bandwidth is 20 MHz, there are 10 interlaces #0-#9.

[0255] In FIG. 5, the case where the subcarrier spacing is 15 kHz has been described, but when the subcarrier spacing is 30 kHz, the frequency spacing of the resource blocks constituting the interlaces may be different. A 20 MHz bandwidth is made up of 50 RBs, and one interlace is made up of 10 RBs. In this case, there are five interlaces, #0-#4. In this case, interlace #i is It consists of 10 RBs with index values ​​{i, i+5, i+10, ..., i+45}. The intersection is made up of multiple RBs spaced at a frequency interval of 5 RBs.

[0256] A subchannel may consist of one or more interlaces. The subchannel index and the interlace index may correspond to each other in ascending order.

[0257] FIG. 6 shows an arrangement of PSCCHs monitored in a terminal device 1 according to an embodiment of the present invention. One slot consists of 14 OFDM symbols (#0, #1, #2, #3, #4, #5, #6, #7, #8, #9, #10, #11, #12, #13). Figure 6(a) shows a case where the PSCCH is monitored in the second OFDM symbol (#1). The PSCCH is monitored in a specific subchannel of the second OFDM symbol (for example, the subchannel with the smallest subchannel index). When the terminal device 1 detects the PSCCH, it receives the PSSCH in another subchannel of the second OFDM symbol, and receives the PSSCH and the DM RS in the third and subsequent OFDM symbols. ) indicates the case where the PSCCH is monitored in the second and third OFDM symbols (#1, #2). The PSCCH is monitored in a specific subchannel (e.g., the subchannel with the smallest subchannel index) of the second and third OFDM symbols. When the terminal device 1 detects the PSCCH, it receives the PSSCH in other subchannels of the second and third OFDM symbols. It receives the PSSCH and DM RS in the fourth and subsequent OFDM symbols. Note that in FIG. 6(b), it is intended to monitor one PSCCH in the second and third OFDM symbols, and two PSCCHs are monitored. It is not intended for monitoring.

[0258] FIG. 7 shows an arrangement of PSCCHs monitored in a terminal device 1 according to an embodiment of the present invention. FIG. 7(a) shows an example of a PSCCH monitoring arrangement. One slot consists of 14 OFDM symbols (#0, #1, #2, #3, #4, #5, #6, #7, #8, #9, #10, #11, #12, #13). FIG. 7(a) shows a case where the PSCCH is monitored in the second OFDM symbol (#1) and the ninth OFDM symbol (#8) at most. A specific subchannel (e.g., subchannel index) of the second OFDM symbol is monitored. When the terminal device 1 detects the PSCCH in the second OFDM symbol, it receives the PSSCH in another subchannel of the second OFDM symbol. Then, PSSCH and DM RS are received in the third and subsequent OFDM symbols, and PSCCH is received in the ninth OFDM symbol. No monitoring is performed. If the terminal device 1 cannot detect the PSCCH in the second OFDM symbol, it monitors the PSCCH in a specific subchannel of the ninth OFDM symbol. If the terminal device 1 can detect the PSCCH in the ninth OFDM symbol, it monitors the other subchannels of the ninth OFDM symbol. and receives PSSCH and DM RS in the 10th and subsequent OFDM symbols.

[0259] FIG. 7(b) shows a case where the PSCCH is monitored at most in the second and third OFDM symbols (#1, #2) and the ninth and tenth OFDM symbols (#8, #9). The PSCCH is monitored in a specific subchannel of the OFDM symbol (for example, the subchannel with the smallest subchannel index). If the terminal device 1 can detect the PSCCH in the second and third OFDM symbols, it receives the PSSCH in other subchannels of the second and third OFDM symbols, receives the PSSCH and DM RS in the fourth and subsequent OFDM symbols, and does not monitor the PSCCH in the ninth and tenth OFDM symbols. If the terminal device 1 cannot detect the PSCCH in the second and third OFDM symbols, and monitoring of the PSCCH in specific subchannels of the 9th and 10th OFDM symbols. When the terminal device 1 detects the PSCCH in the 9th and 10th OFDM symbols, it receives the PSSCH in other subchannels of the 9th and 10th OFDM symbols, and receives the PSSCH and DM RS in the 11th and subsequent OFDM symbols. Note that in FIG. 7(b), it is intended to monitor one PSCCH in the 2nd and 3rd OFDM symbols, and it is not intended to monitor two PSCCHs. It should be noted that in FIG. 7(b), it is intended to monitor one PSCCH in the ninth and tenth OFDM symbols, and it is not intended to monitor two PSCCHs.

[0260] Before transmitting a signal (channel access), the terminal device 1 senses the channel (carrier sense) to check whether other devices (e.g., base station devices, terminal devices, WiFi terminal devices, WiFi access points, etc.) are transmitting. After transmitting the previous signal, the terminal device 1 randomly sets the backoff counter value within the range of the contention window size (CWS). The terminal device 1 waits until it is confirmed that the channel (LBT subband, RB set, for example, a band with a bandwidth of 20 MHz) is idle, and performs carrier sense at each sensing slot time. An RB set may consist of multiple resource blocks. An RB set may be a unit used for resource allocation for sidelink transmission. An RB set may be used for PSCCH / PSSCH transmission. The RB set may be a unit of frequency used for PSFCH transmission. The RB set may be a unit of frequency used for S-SSB transmission. If the channel is idle, device 1 transmits within the contention window size (CWS). The counter value is randomly decreased, and the channel is switched to the After completing the transmission of a signal, the terminal device 1 that performs communication using the HARQ-ACK feedback updates the contention window size based on the HARQ-ACK feedback received from the terminal device 1 to which the signal is to be transmitted. When the status of the HARQ-ACK is ACK, the terminal device 1 sets the contention window size to the minimum value. If the status of the HARQ-ACK is NACK, the terminal device 1 sets the contention window size to the next largest value. If the contention window size reaches the maximum value that can be set, the terminal device 1 continues to use the maximum value even if the status of the HARQ-ACK is NACK.

[0261] When the LBT result is idle, the terminal device 1 determines whether a transmission opportunity is available. : A channel occupancy (TxOP) is acquired, transmission is performed, and if the LBT result is busy (LBT-busy), transmission is not performed. The time of the transmission opportunity is called Channel Occupancy Time (COT). The LBT for acquiring the COT may be called Type 1 channel access procedure. The Type 1 channel access procedure is a Type 1 LBT. The COT may be referred to as the total time of all transmissions within a transmission opportunity and gaps within a given time. The length of the channel access priority class may be less than or equal to a maximum COT (MCOT). The MCOT may be determined based on the channel access priority class. The channel access priority class may be associated with a contention window size. The Type 1 channel access procedure performed to acquire the COT may be referred to as a Type 1 SL channel access procedure. The Type 1 SL channel access procedure may be referred to as a Type 1 SL LBT. The Type 1 channel access procedure may be sensing of the channel to acquire the COT.

[0262] The Type 1 SL channel access procedure may be a channel access procedure by the terminal device 1 when the duration of a sensing slot detected as being in an idle state before a sidelink transmission is random. The Type 1 SL channel access procedure may be applied to a sidelink transmission including at least one of a PSCCH / PSSCH, a PSFCH, or an S-SSB. The terminal device 1 detects that the channel is idle during the sensing slot period of the defer section. After first detecting the presence of a pulmonary embolism, and as the fourth step of the Type 1 channel access procedure, After the counter N becomes 0, the terminal device 1 may perform transmission. As a first step of the Type 1 channel access procedure, the terminal device 1 may set the counter N to an initial counter N. The initial counter N is set randomly from 0 to the contention window size. The terminal device 1 may be a selected value. After step 1, proceed to step 4 of the Type 1 channel access procedure. As a second step of the Type 1 channel access procedure, if the value of counter N is greater than 0, terminal device 1 decrements the value of counter N by 1. As a third step of the Type 1 channel access procedure, terminal device 1 senses the channel for an additional sensing slot, and if the channel is idle during the additional sensing slot, it performs Type 1 channel access. The terminal device 1 senses the channel for the additional sensing slot in the third step of the Type 1 channel access procedure, and if the channel is not idle for the additional sensing slot, the terminal device 1 proceeds to the fourth step of the Type 1 channel access procedure. In the fourth step of the Type 1 channel access procedure, if the value of counter N is not 0, the terminal device 1 may stop the Type 1 channel access procedure. In the fourth step of the Type 1 channel access procedure, if the value of counter N is not 0, the terminal device 1 may stop the Type 1 channel access procedure. The terminal device 1 proceeds to the second step of the Type 1 channel access procedure. As the fifth step of the Type 1 channel access procedure, the terminal device 1 performs a busy sensing step in the additional defer interval. When a slot is detected or all sensing slots in the additional defer interval are idle, If the terminal device 1 detects that the channel is idle during all sensing slots of the additional defer interval as a sixth step of the Type 1 channel access procedure, the terminal device 1 proceeds to a fourth step of the Type 1 channel access procedure. If the terminal device 1 detects that the channel is idle during all sensing slots of the additional defer interval as a sixth step of the Type 1 channel access procedure, the terminal device 1 proceeds to a fourth step of the Type 1 channel access procedure. If the device does not detect that it is a 100% quasi-cable, the fifth step of the Type 1 channel access procedure is performed. The terminal device 1 proceeds to the first step of the Type 1 channel access procedure. The Type 1 SL channel access procedure may be referred to as a Type 1 channel access procedure.

[0263] The sensing may be performed in units of a sensing slot of 9 μs. During sensing of the channel in the sensing slot period, if the detected power is less than the threshold for at least 4 μs within the sensing slot period, the channel may be determined to be idle. If sensing of the channel in the sensing slot period does not result in the channel being idle, the channel may be determined to be busy.

[0264] Channel access priority classes are defined and used. For example, four channel access priority classes (channel access priority class 1, channel access priority class 2, channel access priority class 3, and channel access priority class 4) are defined and used. In channel access priority class 1, the minimum contention window size is 3 slots, the maximum contention window size is 7 slots, and the allowed contention window size is 10 ... In channel access priority class 2, the minimum contention window size is 7 slots and the maximum contention window size is 12 slots. The channel access priority class 3 has a maximum contention window size of 15 slots, and two allowed contention window sizes are {7 slots, 15 slots}. The minimum contention window size is 15 slots, the maximum contention window size is 1023 slots, and the allowed contention window sizes are {15 slots, 31 slots, 63 slots, 127 slots, 255 slots, 511 slots, 1023 slots}. }. In channel access priority class 4, the minimum contention weight is The contention window size is 15 slots, the maximum contention window size is 1023 slots, and there are seven permitted contention window sizes: {15 slots, 31 slots, 63 slots, 127 slots, 255 slots, 511 slots, 1023 slots}. Note that the contention window size may represent the number of counts per slot.

[0265] If the terminal device 1 determines that the channel is busy by carrier sensing during the sensing slot time, it senses whether the channel is idle in the defer interval. The defer interval is composed of 16us and multiple sensing slots. The number of sensing slots that make up the defer interval depends on the channel. It depends on the channel access priority class. In channel access priority class 1, about two sensing slots are configured in the defer section. In priority class 2, two sensing slots are configured in the defer section. In the case of access priority class 3, about three sensing slots are configured in the defer section. In channel access priority class 4, about seven sensing slots are configured in the defer interval. If the terminal device 1 determines that the channel is busy in the defer interval, it judges again in a new defer interval whether the channel is idle. If the terminal device 1 determines that the channel is idle in the defer interval, it decrements the counter value set based on the contention window size, and continues to perform carrier sense at each sensing slot time to judge whether the channel is idle.

[0266] For example, for channel access priority class 1, a maximum COT of 2 ms is used. For example, for channel access priority class 2, a maximum COT of 4 ms is used. For example, for channel access priority class 3, the maximum COT is 6 ms. For example, for channel access priority class 3, a maximum COT of 10 ms is used. For example, for channel access priority class 4, a maximum COT of 6 ms is used. For example, for channel access priority class 4, A maximum COT of 10 ms is used.

[0267] In the sidelink resource allocation mode 2, the terminal device 1 autonomously transmits PSCCH / PSSCH. The upper layer of the terminal device 1 requests the physical layer of the terminal device 1 to determine a resource set SA, and determines resources for PSCCH / PSSCH transmission from the multiple resource sets SA. The physical layer of the terminal device 1 determines the sidelink resource allocation. In order to determine a subset of resources to notify the higher layer in sidelink resource allocation mode 2, the physical layer of the terminal device 1 performs a resource selection procedure. The physical layer of the terminal device 1 may be provided with parameters from the higher layer to determine a subset of resources to notify the higher layer in sidelink resource allocation mode 2. The parameters provided from the higher layer to the physical layer are L1 priority prioTX. , remaining packet delay budget, subchannels used for PSCCH / PSSCH transmission in one slot The upper layer may be a terminal device. The sidelink resource allocation mode 2 is a layer higher than the physical layer of the terminal device 1 and may be a MAC layer. The higher layer may be an RRC layer. The terminal device 1 may transmit a transport block using resources selected in the sidelink resource allocation mode 2. The transport block is transmitted in the PSSCH. A transport block may be referred to as a MAC PDU. A MAC PDU may consist of one SL-SCH subheader and one or more MAC sub PDUs. L1 priority may be a priority of PSSCH transmission.

[0268] The L1 priority may be the priority indicated in the Priority field of SCI format 1-A. The L1 priority may be the priority of PSSCH transmission. The L1 priority may be the priority of PSCCH / PSSCH transmission. The priority level of NR PC5 may have the same format and meaning as the priority value of LTE PC5 PPPP (Prose Per-Packet Priority). The PPPP value reflects the latency requirement and PDB (Packet Delay Budget) of LTE PC5. A lower PDB may be mapped to a higher priority PPPP value. The NR PC5 priority level may be associated with a PDB and a PQI. The PDB may be derived from the PQI table. Priority level handles different V2X service data across different communication modes. The communication mode may be unicast, broadcast, or groupcast. The terminal device 1 is associated with the PC5 reference point. If it is not possible to satisfy all QoS requirements for all received PC5 service data, the Priority level may be used to select which PC5 service data has priority in terms of QoS requirements. For example, a PC5 service data packet with a Priority level value of N may be prioritized over PC5 service data packets with Priority level values ​​of N+1 and N+2. The Priority level may be referred to as L1 priority. V2X may be realized by V2V (Vehicle-to-Vehicle), V2P (Vehicle-to-Pedestrian), V2I (Vehicle-to-Infrastructure), and V2N (Vehicle-to-Network). PQI is a special 5QI and is used as a reference to PC5 QoS characteristics. The PQI may be referred to as PC5 5QI. The standardized PQI value is The QoS characteristic may be mapped one-to-one to a combination of the PC5 QoS characteristics.

[0269] The set SA that the physical layer of the terminal device 1 notifies the upper layer of the terminal device 1 is the PSCCH / PSSCH transmission The set SA may be a set of resource candidates for PSCCH / PSSCH transmission. The set SA may include multiple resource candidates. The terminal device 1 selects the resource candidates for PSCCH / PSSCH transmission included in the set SA. The terminal device 1 may determine a reservation for another terminal device 1 to transmit a PSCCH / PSSCH. Candidate resources of the terminal device 1 that overlap with the reserved resources may be excluded from the set SA. Resources reserved by other terminal devices 1 for PSCCH / PSSCH transmission may be referred to as reserved resources of other terminal devices 1. Candidate resources for PSCCH / PSSCH transmission may be referred to as candidate resources.

[0270] FIG. 8 is a diagram showing an example of a resource selection procedure in a resource pool in which a terminal device 1 according to an aspect of the present embodiment is located. In FIG. 8, contiguous RBs are set in the resource pool. The terminal device 1 may include any of the terminal devices 1A to 1D in FIG. 1. The other terminal device 1 may include any of the terminal devices 1A to 1D in FIG. 1. In FIG. 8, one horizontal square is one slot, and one vertical square is one sub-channel. Sub-channel#0 is , a subchannel in the resource pool with index 0. Slot#0 is the resource A slot belonging to the pool has an index of 0. In FIG. 8, for example, the number of subchannels L_subCH used for PSCCH / PSSCH transmission is set to 2. For example, In FIG. 8, the terminal device 1 may have two subchannels for one candidate resource in each slot within a time interval.

[0271] When the terminal device 1 triggers the resource selection procedure in slot n as the first step of the resource selection procedure, the time interval may be the period from slot n+T1 to slot n+T2. For example, in FIG. 8, slot 801 is the time when the terminal device 1 triggers the resource selection procedure. In FIG. 8, the period 802 is a time interval. The time interval may be the duration of a candidate resource for PSCCH / PSSCH transmission. The terminal device 1 may determine a candidate resource by dividing consecutive subchannels by the number of L_subCHs in the slots of the resource pool within the time interval. That is, one candidate resource may be defined as a set of consecutive resources starting from the index of a certain subchannel in a certain slot, the number of which is L_subCH. The candidate resource may be indicated by a slot index and a starting index of a subchannel. For example, in FIG. 8, the candidate resource 803 may be one of the candidate resources using sub-channel #0 and sub-channel #1 in slot #8. The candidate resource 804 may be one of the candidate resources using sub-channel #1 and sub-channel #2 in slot #8. The candidate resource 805 may be one of the candidate resources using sub-channel #0 and sub-channel #1 in slot #11. Similarly, the terminal device 1 may determine that there are candidate resources using sub-channel #0 and sub-channel #1 in slot #9. The terminal device 1 may determine that there is a candidate resource using sub-channel #1 and sub-channel #2 in slot #9. The terminal device 1 may determine that there is a candidate resource using sub-channel #0 and sub-channel #1 in slot #10. The terminal device 1 may determine that there is a candidate resource using sub-channel #1 and sub-channel #2 in slot #10. The terminal device 1 may determine that there are a total of eight candidate resources within the time interval. The terminal device 1 may determine T1 in the range of 0 to Tproc1. Tproc1 is the number of slots. and is defined for each subcarrier interval of the sidelink BWP. The terminal device 1 may determine T2 based on T2min and the remaining packet delay budget. For example, the terminal device 1 may If T2min is shorter than the remaining packet delay budget, set T2 to T2min or more. The terminal device 1 may determine the packet delay within the packet delay budget. If T2 is not shorter than the remaining packet delay budget, T2min may be set to the time from the RRC parameter sl-SelectionWindowList to the PSSCH A value corresponding to the transmission priority L1 priority prioTX may be determined. sl-SelectionWindowList is a list of parameters for determining the end of a time interval, and L1 priority and window size are set. sl-SelectionWindowList may be included in the configuration information of a resource pool. L1 priority prioTX is a priority for PSCCH / PSSCH transmission of the terminal device 1. The terminal device 1 may set the number of all candidate resources in a time interval as M_total. For example, in FIG. 8, M_total is the number of candidate resources in one slot. Since there are two candidate resources in the time interval and the time interval period is four slots, the number of candidate resources is eight. For example, when L_subCH is 1, the terminal device 1 selects each slot in the time interval. In FIG. 8, one subchannel is one candidate resource. In FIG. 8, when L_subCH is 1, the terminal device 1 determines that there are three candidate resources in each slot. Since the terminal device 1 determines that there are three candidate resources in one slot and the time interval period is four slots, M_total becomes 12. In other words, the first step of the resource selection procedure is a step for determining candidate resources within a time interval.

[0272] As a second step of the resource selection procedure, the terminal device 1 may define a range from slot n-T0 to slot n-Tproc0 as a sensing window. For example, in FIG. Duration 807 may be the duration of the sensing window. T0 is the number of slots and may be determined based on the RRC parameter sl-SensingWindow. Tproc0 is used to determine the end of the sensing window and is determined by the subcarrier spacing of the sidelink BWP. The sl-SensingWindow is a parameter for determining the start of the sensing window and may be included in the configuration information of the resource pool. The terminal device 1 monitors slots belonging to the sidelink resource pool, except for the slot in the sensing window in which the terminal device 1 itself has transmitted. That is, the second step of the resource selection procedure is a step for defining the sensing window.

[0273] The terminal device 1 may determine the RSRP threshold as a third step of the resource selection procedure. In a sixth step, the terminal device 1 determines an RSRP threshold in order to exclude candidate resources based on the RSRP threshold. The terminal device 1 may determine an RSRP threshold for each of the PSSCH transmission priority L1 priority prioTX of the terminal device 1 and the PSSCH transmission priority L1 priority prioRX of the other terminal device 1 notified in the SCI. The sl-Thres-RSRP-List indicates a list of 64 types of thresholds, and the PSSCH transmission priority L1 priority prioTX of the terminal device 1 and the PSSCH transmission priority L1 priority prioRX of the other terminal device 1 notified in the SCI may be determined. The thresholds to be used may be determined from the L1 priority prioRX. The sl-Thres-RSRP-List may be included in the configuration information of the resource pool. The third step is to determine the RSRP threshold.

[0274] As a fourth step of the resource selection procedure, the terminal device 1 selects a candidate resource from the set SA. In the fourth step of the resource selection procedure, all candidate resources may be configured. The terminal device 1 may initialize the set S_A to include all the candidate resources determined in the first step. That is, the fourth step of the resource selection procedure is a step for setting all the candidate resources determined in the first step in the set SA, which is a collection of candidate resources.

[0275] As a fifth step of the resource selection procedure, the terminal device 1 selects the Assume that the terminal device 1 itself transmits and receives SCI format 1-A in a slot that is not monitored within the sensing window. Then, the RRC Candidate resources belonging to slots on all periods of the parameter sl-ResourceReservePeriodList may be excluded from the set SA. The sl-ResourceReservePeriodList indicates a set of periods of reserved resources valid in the resource pool, and up to 16 values ​​may be set for each resource pool. The sl-ResourceReservePeriodList may be included in the configuration information of the resource pool. For example, in FIG. 8, the slot 808 is a slot that the terminal device 1 monitors. The terminal device 1 receives SCI format 1-A in slot 808. Assume that the resource is received from slot 808 on all periods in sl-ResourceReservePeriodList. In FIG. 8, it is assumed that 8-period slots and 9-period slots are indicated in sl-ResourceReservePeriodList. Slot 809 is a slot that is 8 periodic slots from slot 808. Terminal device 1 excludes candidate resources that belong to slot 809 from set SA. Slot 810 is a slot that is 9 periodic slots from slot 808. Terminal device 1 excludes candidate resources that belong to slot 810 from set SA. from the set SA. That is, the fifth step of the resource selection procedure is a step for eliminating candidate resources from the set SA by considering the slots that are not monitored in the sensing window.

[0276] The terminal device 1 selects the candidate resources remaining in the set SA after the fifth step of the resource selection procedure. If the number of candidate resources is less than X·M_total, the set SA may contain all the candidate resources determined in the first step. X is the sum of all the candidate resources determined in the first step. X may indicate the percentage of candidate resources with respect to the total number M_total. X may be set in the RRC parameter sl-TxPercentateList. sl-TxPercentateList is the configuration information of the resource pool. If the number of candidate resources remaining in the set SA is equal to or greater than X·M_total, the terminal device 1 maintains the candidate resources in the set SA.

[0277] In the sixth step of the resource selection procedure, the terminal device 1 selects the received signal in the sensing window. The terminal device 1 determines the location of the reserved resources of the other terminal device 1 based on the resource reservation period field, the time domain resource allocation field, and the frequency domain resource allocation field of the SCI format 1-A of the other terminal device 1 that the terminal device 1 has received. If the RSRP measurement value of the SCI format 1-A of the other terminal device 1 is higher than a set RSRP threshold, the terminal device 1 may exclude candidate resources that overlap with the reserved resources of the other terminal device 1 from the set SA. For example, in FIG. 8, resource 811 is a resource with which the terminal device 1 has received the SCI format 1-A of the other terminal device 1 on sub-channel #1 in slot #3 in the sensing window. The terminal device 1 determines the location of the reserved resources of the other terminal device 1 based on the resource reservation period field, the time domain resource allocation field, and the frequency domain resource allocation field of the SCI format 1-A of the other terminal device 1 that the terminal device 1 has received on resource 811. The location of the reserved resource of the other terminal device 1 may be determined from the SCI format 1-A received in resource 811. Resource 812 is the reserved resource of the other terminal device 1 indicated by the SCI format 1-A received in resource 811. Resource 812 is the reserved resource of the other terminal device 1 present in sub-channel #0 of Slot #11. When the terminal device 1 determines that the RSRP measurement value of the SCI format 1-A of the other terminal device 1 received in resource 811 is higher than the set RSRP threshold, it excludes the candidate resource 805 that overlaps with the reserved resource 812 of the other terminal device 1 from the set SA. Resource 813 is the cell The resource 811 is a resource in which the terminal device 1 received SCI format 1-A of the other terminal device 1 on sub-channel #2 in slot #4 in the sensing window. The other terminal device 1 that transmitted SCI format 1-A on resource 811 and the other terminal device 1 that transmitted SCI format 1-A on resource 813 are different terminal devices. The terminal device 1 may convert the SCI format 1-A received in the resource 813 into the SCI format 1-B. The location of the reserved resource of the other terminal device 1 may be determined. Resource 814 is the reserved resource of the other terminal device 1 indicated by the SCI format 1-A received in resource 813. Resource 814 The terminal device 1 receives the RSRP measurement value of SCI format 1-A of the other terminal device 1 in the resource 813. If it is determined that the RSRP is equal to or less than the RSRP threshold, the candidate resource 806 is not excluded from the set SA even if the reserved resource 814 of the other terminal device 1 overlaps with the candidate resource 806. The sixth step is to convert the SCI format 1-A of the other terminal device 1 received in the sensing window into This is a step for deciding whether to exclude a candidate resource from the set SA based on the

[0278] In the seventh step of the resource selection procedure, the terminal device 1 selects the candidate resources remaining in the set SA. If the number of candidate resources remaining in the set SA is less than X·M_total, the RSRP threshold is increased by 3 dB, and resource selection is redone from the fourth step of the resource selection procedure. If the number of candidate resources remaining in the set SA is equal to or greater than X·M_total, the physical layer of the terminal device 1 may notify the upper layer of the terminal device 1 of the set SA. In other words, the seventh step of the resource selection procedure is to decide whether to redo the resource selection. The set SA may be referred to as a set of candidate resources.

[0279] When the terminal device 1 redoes the resource selection, the RSRP threshold for excluding candidate resources in the sixth step may be increased by 3 dB. For example, the terminal device 1 may increase the RSRP threshold by 3 dB so that the number of candidate resources to be excluded in the second sixth step is smaller than that of the first sixth step. The number of candidate resources to be eliminated in the second step is smaller than the number of candidate resources to be eliminated in the second step. From the 1st resource selection, the number of candidate resources remaining in the set SA can be increased. For example, in FIG. 8, if the number of candidate resources remaining in the set SA as a result of the 1st resource selection is smaller than a predetermined number, the terminal device 1 amplifies the RSRP threshold by 3 dB and redoes the resource selection from the 4th step. In FIG. 8, since the RSRP measurement value of SCI format 1-A of the other terminal device 1 received in resource 811 exceeds the RSRP threshold in the 6th step of the 1st round, In the sixth step for the second time, when the measured value of the RSRP of the SCI format 1-A received in the resource 811 does not exceed the RSRP threshold, the terminal device 1 does not exclude the candidate resource 805 that overlaps with the reserved resource 812 of the other terminal device 1 from the set SA. In other words, the terminal device 1 increases the RSRP threshold and redoes the resource selection, thereby reducing the number of candidate resources remaining in the set SA. You can increase the source.

[0280] The upper layer of the terminal device 1 receives the PSCCH / PSSCH from the set SA notified from the physical layer of the terminal device 1. The upper layer of the terminal device 1 may select (determine) resources for transmission and notify the physical layer of the terminal device 1. The upper layer of the terminal device 1 may generate an SL grant to indicate the selected resources and pass the generated SL grant to the physical layer of the terminal device 1. The physical layer of the terminal device 1 may determine resources for PSCCH / PSSCH transmission (i.e., resources selected by the upper layer of the terminal device 1) based on the SL grant. The terminal device 1 transmits PSCCH / PSSCH using the resources selected (determined) by the higher layer. Among the resources selected (determined) by a higher layer for a certain resource selection procedure, PSCCH / PSSCH transmission in the first resource may be referred to as initial transmission. PSCCH / PSSCH transmission in resources other than the first resource does not have to be referred to as initial transmission. In other words, among the resources selected (determined) by a higher layer for a certain resource selection procedure, resources other than the first resource may be referred to as reserved resources (reserved resources of the terminal device 1 itself). After the terminal device 1 autonomously selects resources for PSCCH / PSSCH transmission (mode 2), The first PSCCH / PSSCH transmission in the candidate resources may be set as an initial transmission. The terminal device 1 may set the reserved resources of the terminal device 1 after a resource reservation period following the initial transmission. In the present invention, the initial transmission is the first transmission using the determined resource. Good too.

[0281] The terminal device 1 may perform multi-consecutive slot transmission (MCSt) in consecutive slots including sidelink transmission. MCSt is called transmission in multiple consecutive slots. This is also fine.

[0282] The transport blocks transmitted in each slot of the MCSt may be different transport blocks. Also, the transport blocks transmitted in each slot of the MCSt may include the same transport block. The MCSt of different transport blocks may be referred to as an MCSt of Multiple TBs (Transport Blocks). The terminal device 1 In addition, a resource selection procedure may be performed for each transport block to be transmitted in MCSt. The physical layer of the terminal device 1 may determine a set of candidate resources SA for each resource selection procedure. The MAC layer of the terminal device 1 receives a set of candidate resources SA from the physical layer to determine the resources for MCSt. Resources may be selected from the set of candidate resources SA notified for each block so that they are continuous in the slot. MCSt may be referred to as a sidelink transmission burst. For example, when performing MCSt of Multiple TBs, the terminal device 1 performs a first resource selection procedure to determine resources to be used for transmitting a first transport block, and the terminal device 1 determines the first set of candidate resources SA. The terminal device 1 performs a second resource selection procedure to determine resources to be used for transmitting a second transport block, and the terminal device 1 determines the second set of candidate resources SA. The terminal device 1 selects resources for performing MCSt from the determined first set of candidate resources SA and the second set of candidate resources SA. Alternatively, when performing MCSt, the terminal device 1 performs a first resource selection procedure to determine resources to be used for transmitting a first transport block, and determines the first set of candidate resources. The terminal device 1 determines resources for performing MCSt from the determined first set of candidate resources.

[0283] FIG. 9 is a diagram showing an example of the arrangement of slots of MCSt of the terminal device 1 according to one aspect of the present embodiment. The terminal device 1 may include any of the terminal devices 1A to 1D in FIG. 1. In FIG. 9, one horizontal square is one slot. Slot #0 is a slot that belongs to a resource pool. , has an index of 0. Slot #1 is a slot that belongs to the resource pool, Slot #2 is a slot that belongs to a resource pool and has an index of 1. Slot #3 is a slot that belongs to the resource pool and has an index of 2. Slot #4 is a slot that belongs to the resource pool and has index 4. Slot #0, Slot #1, Slot #2, Slot #3, Slot #4, 9 may be 1RB set. The frequency domain in FIG. 10 ... The area may be one channel.

[0284] For example, in FIG. 9, the terminal device 1 receives consecutive slots #1, #2, and #3 including the PSSCH. The terminal device 1 may transmit different transport blocks in slot #1, slot #2, and slot #3. The terminal device 1 may also transmit data including the same transport block in slot #1, slot #2, and slot #3. For example, terminal device 1 may transmit transport block #1 in slot #1, transport block #2 in slot #2, and transport block #3 in slot #4. Furthermore, terminal device 1 may transmit transport block #1 in slot #1, slot #2, and slot #3. Furthermore, terminal device 1 may transmit transport block #1 in slot #1 and slot #2, and transmit transport block #2 in slot #3. Here, transport block #1, transport block #2 may be transmitted. Transport block #2 and transport block #3 are different transport blocks.

[0285] When interlacing is configured in the resource pool, the number of RB sets L_RBset used for one candidate resource may be included in the parameters provided from the higher layer to the physical layer for performing sidelink resource allocation mode 2. The upper layer may be a MAC layer. The upper layer may be an RRC layer. If the physical layer of the terminal device 1 is provided with L_RBset, the terminal device 1 In the first step of the resource selection procedure, the number of RB sets indicated by L_RBset is used. A candidate resource may be defined. The number of subchannels L_subCH provided from the higher layer to the physical layer may be the number of subchannels used in one RB set. In the first step of the procedure, one candidate resource may be defined as consecutive subchannels in each RB set, the number of which is equal to the number of L_subCHs, in consecutive RB sets, the number of which is equal to the number of L_RBsets, in a certain slot. Also, one candidate resource may be defined by a slot index, a starting index of an RB set, and a starting index of a subchannel. For example, when the physical configuration of terminal device 1 is provided with L_RB set=2 and L_subCH=2 from a higher layer, terminal device 1 defines one candidate resource as a subchannel index #0 and a subchannel in RB set #0. In RB set #1, the subchannel has subchannel index #0 and The resource may have channel index #1.

[0286] The number of consecutive slots Nslot,MCSt may be included in the parameters provided from the upper layer to the physical layer. The upper layer may be a layer higher than the physical layer of the terminal device 1. The upper layer may be a MAC layer. The upper layer may be an RRC layer. When the physical layer of the terminal device 1 is provided with Nslot,MCSt, the physical layer of the terminal device 1 may define the time domain of one candidate resource as a resource having consecutive slots of the number of Nslot,MCSt in the first step of the resource selection procedure. When Nslot,MCSt is provided, one candidate resource may be referred to as a multi-slot candidate resource. The index of the time domain of one multi-slot candidate resource may be indicated by the index of the first slot of the multi-slot candidate resource. The frequency resources of the multi-slot candidate resource may all be the same in each slot. The frequency resources of the multi-slot candidate resource may be different in each slot. For example, when a contiguous RB is set in the resource pool, the physical layer of the terminal device 1 may define the time domain of one candidate resource as a resource having consecutive slots of the number of Nslot,MCSt in the first step of the resource selection procedure. If Nslot,MCSt=2 and L_subCH=2 are provided, one multi-slot candidate resource In slot #1, subchannel index #1 and subchannel index #2 The terminal device 1 may have a resource having subchannel index #1 and subchannel index #2 in slot #2. When the physical layer of the terminal device 1 is provided with Nslot,MCSt=2, L_RB set=2, and L_subCH=2 from the upper layer, one multi-candidate resource is a subchannel index #1 and a subchannel index #2 in each of RB sets #0 and #1 in slot #1. and may be a resource having subchannel index #1 and subchannel index #2 in each of RB sets RB set #0 and RB set #1 in slot #2.

[0287] A resource pool may include one or multiple RB sets in the frequency domain. A channel may be a carrier or a part of a carrier consisting of a set of contiguous resource blocks for which channel access is performed in a shared spectrum. That is, a channel may be a unit in which sensing is performed. Sensing may be Type 1 channel access procedure. Sensing may also be Type 2 channel access procedure. Sensing may also be Type 2A channel access procedure. Sensing may also be Type 2B channel access procedure. Sensing may also be Type 2C channel access procedure. A channel may be referred to as an RB set. An RB set may be configured in a sidelink BWP. An RB set may be a start of an RB set. The terminal device 1 may perform sensing for each RB set. When the terminal device 1 performs sidelink transmission simultaneously on multiple channels, the terminal device 1 may perform multi-channel access. Multi-channel access may be a method of sensing multiple channels used for sidelink transmission. The RB set may be referred to as a sub-band. Type 2A channel access procedure is referred to as Type 2A LBT. The Type 2B channel access procedure may be referred to as Type 2B LBT. The Type 2C channel access procedure may be referred to as Type 2C LBT. The channel may be a unit of 20 MHz in the frequency domain including the RB set and the guard band.

[0288] Before transmitting in the first slot of MCSt, terminal device 1 executes Type 1 channel access procedure The terminal device 1 may perform Type 1 channel access procedure for the RB set to which the PSSCH of the first slot of MCSt belongs. If the Type 1 channel access procedure is successful before transmission in the first slot of MCSt, the terminal device 1 may perform MCSt. The terminal device 1 may perform multi-channel access before transmission in the first slot of the MCSt. If the multi-channel access is successful before transmission in the first slot of the MCSt, the terminal device 1 may perform MCSt. If the Type 1 channel access procedure or the multi-channel access fails in the first slot of the MCSt, the terminal device 1 may perform MCSt. Type 1 channel access procedure or multichannel before transmission in the second slot In other words, if the terminal device 1 fails in the Type 1 channel access procedure for MCSt or the multi-channel access, the terminal device 1 may perform the access for the slot in which the transmission was not possible. Type 1 channel access procedure or multi-channel for transmission from the next slot For example, in FIG. 9, the terminal device 1 transmits in slot #1. Type 1 channel access procedure or multi-channel access may be performed before transmission. The terminal device 1 may perform Type 1 channel access procedure or multi-channel access for the RB set to which the PSSCH of slot #1 belongs. The terminal device 1 may perform MCSt if the Type 1 channel access procedure or multi-channel access is successful. The terminal device 1 may perform Type 1 channel access procedure or multi-channel access before transmission in slot #1. If the channel access fails, the terminal device 1 may perform Type 1 channel access procedure or multi-channel access for transmission in slot #2. If the Type 1 channel access procedure or multi-channel access fails before transmission , Type 1 channel access procedure or multi-channel access may be performed for transmission in slot #3.

[0289] When the terminal device 1 applies the Type 1 channel access procedure to transmit the PSCCH / PSSCH of a single TB (Transport Block), the terminal device 1 transmits the channel associated with the single TB. The access priority class value is used to perform the Type 1 channel access procedure. The terminal device 1 may perform MCSt to transmit a single TB in multiple consecutive slots. For example, in FIG. 9, the terminal device 1 may transmit a first transport block using slot #1, slot #2, and slot #3.

[0290] When the terminal device 1 applies the Type 1 channel access procedure to transmit Multiple TBs in multiple consecutive slots, the terminal device 1 may The maximum channel access priority class value among the access priority class values ​​may be used to perform Type 1 channel access procedure. For example, in FIG. Then, the terminal device 1 receives the first channel associated with the channel access priority class value 1 in slot #1. Channel access priority class value in one transport block, slot #2 2, the second transport block associated with slot #3, If the terminal device 1 performs MCSt of a third transport block associated with the channel access priority class value 3, the terminal device 1 performs MCSt of a Type 1 channel access priority class value 3. ESS procedure may be performed.

[0291] FIG. 10 is a diagram showing an example of an arrangement of consecutive slot transmissions including a plurality of sidelink transmissions of a terminal device 1 according to an aspect of the present embodiment. The terminal device 1 may include any of the terminal devices 1A to 1D in FIG. 1. In FIG. 10, one horizontal square is one slot. Slot #0 is ,A slot that belongs to the resource pool has an index of 0. Slot #1 is the Slot #2 is a slot that belongs to the resource pool and has an index of 1. Slot #3 is a slot that belongs to the resource pool and has index 2. Slot #4 belongs to the resource pool and has index 3. Slot #5 belongs to the resource pool The slots belong to the , and have an index of 4. Slot #0, slot #1, slot #2, slot #3, and slot #4 are consecutive slots. Slot #1 is the slot where the PSFCH is Slot #1 is a slot in which PSSCH is transmitted. Slot #2 is a slot in which PSSCH is transmitted. Slot #3 is a slot in which S-SSB is transmitted. The frequency domain in FIG. 10 is a 1RB set. The frequency domain in Fig. 10 may be one channel.

[0292] When the terminal device 1 applies the Type 1 channel access procedure to transmit multiple sidelink transmissions in multiple consecutive slots, the terminal device 1 transmits multiple sidelink transmissions in multiple consecutive slots. The highest channel access priority class value among the channel access priority class values ​​associated with the transmission may be used when performing the Type 1 channel access procedure. For example, in FIG. 10, terminal device 1 sets the channel access priority in slot #1. PSFCH transmission associated with channel access priority class value 1 in slot #1, PSSCH transmission associated with channel access priority class value 3 in slot #2, PSSCH transmission associated with channel access priority class value 1 in slot #3. When performing the associated S-SSB transmission, the terminal device 1 uses the channel access priority class value 3 may be used for Type 1 channel access procedure for multiple sidelink transmissions. stomach.

[0293] The S-SSB may consist of P-SSS, S-SSS and PSBCH. The access priority class value may be 1. Channel access for PSFCH transmission The priority class value may be 1.

[0294] The channel access priority class value of the channel access priority class 1 may be 1. The channel access priority class value of the channel access priority class 2 may be 2. The channel access priority class value of the channel access priority class 3 may be 3. The channel access priority class value of the channel access priority class 4 may be 4. The channel access priority class value is set as the sensing slot for the defer period. It may relate to the number and minimum and maximum contention window sizes and the duration of maximum channel occupancy and allowed contention window size.

[0295] Terminal device 1 is scheduled to transmit on a set of channels C, Drink transmission now starts transmitting simultaneously on all channels in channel set C If scheduled, the terminal device 1 may access multiple channels on which sidelink transmissions are performed according to a multi-channel access procedure for sidelink transmissions. The terminal device 1 may also access multiple channels on which sidelink transmissions are performed according to a multi-channel access procedure for sidelink transmissions on resources configured in a set C of channels. The sidelink transmission is intended to be performed on all channels in the set of channels C. If the terminal device 1 is configured to simultaneously start transmission on multiple channels on which sidelink transmission is performed according to a multi-channel access procedure for sidelink transmission, the terminal device 1 may access multiple channels on which sidelink transmission is performed according to a multi-channel access procedure for sidelink transmission. The sidelink transmission is intended to take place on the selected resource and the sidelink transmission is If terminal device 1 starts transmitting simultaneously on all channels in set C of channels, A sidelink station may access multiple channels over which sidelink transmissions are to be performed according to a multi-channel access procedure for sidelink transmissions, where the set of channels C is one or It may be a set including multiple channels.

[0296] The multi-channel access procedure for sidelink transmission applies to PSCCH / PSSCH transmission. The multi-channel access procedure for sidelink transmissions is applicable to S-SSB transmissions. The multi-channel access procedure for sidelink transmission may be used for PSFCH transmission. may be applied to.

[0297] The multi-channel access procedure for sidelink transmission may be referred to as a multi-channel access procedure.

[0298] FIG. 11 is a diagram illustrating an example of sidelink transmission in a plurality of channels of a terminal device 1 according to an aspect of the present embodiment. The terminal device 1 may include any of the terminal devices 1A to 1D in FIG. 1. In FIG. 11, one horizontal square corresponds to one slot. Slot #0 is a slot in the resource pool. Slot #1 belongs to the resource pool and has an index of 0. Slot #2 is a slot that belongs to a resource pool and has an index of 1. Slot #1 is a slot with an index of 2. Slot #2 is a slot that belongs to a resource pool. Slot #4 is a slot that belongs to a resource pool and has an index of 3. RB set#0 is an RB set that belongs to a resource pool and has an index of 4. RB set#1 is an RB set that belongs to a resource pool and has an index of 1. RB set#2 is an RB set that belongs to a resource pool and has an index of 2. 11 uses RB set#0, RB set#1, and RB set#2, and starts side link simultaneously. 111 may be a link transmission. 111 may be a PSCCH / PSSCH transmission. 111 may be a PSSCH transmission. 111 may be a PSFCH transmission. 111 may be an S-SSB transmission. Channel set C may be configured with channels on which sensing is performed for transmission in RB set#0, RB set#1, and RB set#2. Channel set C may be configured with RB set#0, RB set#1, and RB set#2. The terminal device 1 may perform a multi-channel access procedure for the transmission of 111. RB set#0 is referred to as channel#0. RB set#1 may be referred to as channel#1, and RB set#2 may be referred to as channel#2.

[0299] The terminal device 1 intends to perform sidelink transmission on a set of channels C, If the Type 1 channel access procedure is used for sidelink transmissions on channel set C, then the Type 1 channel access procedure shall be used on each channel of channel set C. For example, in Fig. 11, terminal device 1 may perform Type 1 channel access procedure in each of RB set #0, RB set #1, and RB set #2.

[0300] The terminal device 1 intends to perform sidelink transmission on a set of channels C, accessing the first channel using the Type 1 channel access procedure when the Type 1 channel access procedure is used for sidelink transmissions on the set C of channels; The terminal device 1 may transmit on the second channel using the Type 2A channel access procedure immediately before transmitting on the first channel. Alternatively, the terminal device 1 may transmit on the sidelink in the set C of channels. When the Type 1 channel access procedure is used for sidelink transmissions in channel set C, the channel frequencies of channel set C are defined. A subset of the set of channel frequencies defined in the IEEE 802.11b standard, in which a first channel is accessed using a Type 1 channel access procedure and a second channel is accessed immediately prior to transmission on the first channel. The first channel may be a channel in the set C of channels. The second channel is any channel in set C of channels other than the first channel, and may be selected randomly from set C of channels. For example, in FIG. 11, the terminal device 1 may apply a multi-channel access procedure to perform sidelink transmission that starts simultaneously in RB set #0, RB set #1, and RB set #2 in slot #1. The terminal device 1 may randomly select a first channel from RB set #0, RB set #1, and RB set #2. The terminal device 1 may select RB set #1 as the first channel. RB set #0 and RB set #2 may be defined as the second channel. The terminal device 1 may perform Type 1 channel access procedure in RB set #1. When Type 1 channel access in RB set #1 is successful, the terminal device 1 may perform transmission using Type 2A channel access procedure in the second channel immediately before transmission in the first channel. In other words, the terminal device 1 may perform transmission using Type 2A channel access procedure in RB set #0 and RB set #2. The terminal device 1 may perform Type 2A channel access procedure in the second channel. If the conditions for performing the Type 2A channel access procedure are not met, the terminal device 1 may perform a Type 1 channel access procedure on each channel of the set C of channels.

[0301] When the terminal device 1 performs sidelink transmission using the Type 2A channel access procedure in a certain channel, the terminal device 1 must have a sensing interval of at least 25 μs. If the channel is idle, the terminal device 1 may perform sidelink transmission on the channel immediately after sensing. The sensing interval may consist of a first period and one sensing slot immediately following the first period. The first period may be 16 μs in duration. The terminal device 1 may include one sensing slot at the beginning of the 25 μs sensing interval. One sensing slot may be 9 μs in duration. If the sensing slot is idle, the channel may be considered to be idle. For example, the terminal device 1 may define a sensing slot immediately following the first period as the first sensing slot. The terminal device 1 may define a sensing slot included at the start of the first period as the second sensing slot. If the terminal device 1 is idle in both the first sensing slot and the second sensing slot, it may determine that the channel is idle and transmit. In other words, the Type 2A channel access procedure senses the channel for at least 25 μs and transmits if the channel is idle. The Type 2A channel access procedure performed for sidelink transmission is called Type 2A SL channel access procedure. The Type 2A channel access procedure may be referred to as Type 2A LBT.

[0302] If the terminal device 1 cannot access any channel of the carrier bandwidth for which sidelink resources are scheduled or configured, the terminal device 1 cannot transmit on the set of channels C. For example, the terminal device 1 cannot transmit 111 in FIG. If the terminal device 1 fails to access any of the channels RB set#0, RB set#1, and RB set#2, it transmits 111. The terminal device 1 executes a multi-channel access procedure to transmit 111, and cannot access any one of the RB set #0, RB set #1, and RB set #2. If this fails, transmission cannot be performed even if channel access in another RB set is successful.

[0303] After the terminal device 1 has successfully completed the multi-channel access procedure for the set C of channels, Within the initiated channel occupancy of the set of channels, a second sidelink transmission may be performed after the first sidelink transmission. The second sidelink transmission may be an S-SSB transmission. The second sidelink transmission may be a PSFCH transmission. The second sidelink transmission may be a PSCCH / PSSCH transmission. The second sidelink transmission may be an S-SSB or a PSFCH. The transmission may include either PSCCH / PSSCH.

[0304] FIG. 12 is a diagram showing multiple sidelink transmissions in multiple channels in consecutive slots of a terminal device 1 according to an aspect of this embodiment. The terminal device 1 may include any of the terminal devices 1A to 1D in FIG. 1. In FIG. 12, one horizontal square represents one slot. Slot #0 is a slot that belongs to a resource pool and has an index of 0. Slot #1 is a slot that belongs to a resource pool and has an index of 1. Slot #2 is a slot that belongs to a resource pool and has an index of 2. Slot #3 is a slot that belongs to the resource pool and has index 2. Slot #4 is a slot that belongs to the resource pool and has index 3. The slots in the resource pool have an index of 4. RB set#0 is a slot in the resource pool. RB set #0 is an RB set belonging to a resource pool and has an index of 0. RB set #1 is an RB set belonging to a resource pool and has an index of 1. RB set #2 is an RB set belonging to a resource pool and has an index of 2. 121 uses RB set #0, RB set #1, and RB set #2, and 121 may be a PSCCH / PSSCH transmission. 121 may be a PSSCH transmission. 121 may be a PSFCH transmission. 121 may be an S-SSB transmission. The terminal device 1 may select a multi-channel access for 121. The sidelink transmission procedure may be performed by 122 within the channel occupation started for the transmission of 121. The sidelink transmission procedure may be performed by 122 using RB set #1 and RB set #2. 122 may be a PSCCH / PSSCH transmission. RB set #2 may be a PSSCH transmission. 122 may be a PSFCH transmission. 122 may be an S-SSB transmission. RB set #0 may be referred to as channel #0. RB set #1 may be referred to as channel # RB set #2 may be referred to as channel #2. In each RB set, the terminal may transmit either PSCCH / PSSCH, PSFCH, or S-SSB. Terminal device 1 transmits either PSCCH / PSSCH, PSFCH, or S-SSB in each of the 122 RB sets. For example, the terminal device 1 may transmit PSFCH#0 in RB set#0, PSFCH#1 in RB set#1, and PSFCH#2 in RB set#2. The terminal device 1 may transmit PSCCH / PSSCH#0 in RB set#0, PSCCH / PSSCH#1 in RB set#1, and PSCCH / PSSCH#2 in RB set#2. The terminal device 1 may transmit PSCCH / PSSCH#0 in RB set#0, PSCCH / PSSCH#1 in RB set#1, and PSCCH / PSSCH#2 in RB set#2. In RB set #1, a PSFCH may be transmitted, and in RB set #2, an S-SSB may be transmitted.

[0305] In the first embodiment of the present invention, a terminal device 1 is configured to receive one or more When applying the multi-channel access procedure for performing multiple sidelink transmissions in multiple consecutive slots, the terminal device 1 may select a maximum channel access priority class value among multiple channel access priority class values ​​associated with the multiple sidelink transmissions, and use the channel access priority class value selected in the multi-channel access procedure for the channel on which Type 1 channel access prcedure is performed. When the terminal device 1 performs the multi-channel access procedure for performing multiple sidelink transmissions on multiple channels in one or more consecutive slots in a shared spectrum to initiate channel occupancy, the terminal device 1 may select a maximum channel access priority class value among multiple channel access priority class values ​​associated with the multiple sidelink transmissions, and use the channel access priority class value selected in the multi-channel access procedure for the channel on which Type 1 channel access prcedure is performed. Type 1 channel access procedure is performed based on the channel access priority class value of For each sidelink transmission, one channel access priority class value may be associated. In this embodiment, when the terminal device 1 performs a multi-channel access procedure to initiate channel occupancy for multiple sidelink transmissions on multiple channels in one or more consecutive slots in the shared spectrum, the terminal device The terminal device 1 may select a maximum channel access priority class value from a plurality of channel access priority class values ​​associated with a plurality of sidelink transmissions. The terminal device 1 may use the selected channel access priority class value in a channel on which a Type 1 channel access procedure is performed in a multi-channel access procedure. 1 is a multi-channel 1 for a first sidelink transmission that transmits on a set of channels C. The terminal device 1 may perform an access procedure. After the channel access procedure is successful, the first sidelink transmission may be followed by a second sidelink transmission within the initiated channel occupancy of channel set C. The first and second sidelink transmissions may be separated by multiple transmissions in one or more consecutive slots. In the case where the terminal device 1 applies a multi-channel access procedure to perform the first sidelink transmission and the second sidelink transmission, the terminal device 1 may select a maximum channel access priority class value among a plurality of channel access priority class values ​​associated with the first sidelink transmission and the second sidelink transmission. The terminal device 1 may use the selected channel access priority class value in a channel in which the Type 1 channel access procedure is performed in the multi-channel access procedure. The second sidelink transmission may be a transmission using one RB set. The terminal device 1 may perform a third sidelink transmission in the channel occupancy after the second sidelink transmission. In this case, the multiple sidelink transmissions may include the first sidelink transmission, the second sidelink transmission, and the third sidelink transmission. The third sidelink transmission may be a transmission using one RB set. The channel in which the sidelink transmission associated with the maximum channel access priority class value is performed may be different from the channel in which the Type 1 channel access procedure is performed. It is also possible.

[0306] For example, in FIG. 12, 121 uses RB set #0, RB set #1, and RB set #2. The terminal device 1 may transmit the first sidelink using RB set #0 and The terminal device 1 may perform a multi-channel access procedure for RB set #0, RB set #1, and RB set #2. The set C of channels may be composed of RB set #0, RB set #1, and RB set #2. The terminal device 1 may transmit 121 when the multi-channel access procedure is successful. The terminal device 1 may transmit 122 within the channel occupancy started for the transmission of 121. The transmissions of 121 and 122 may be multiple sidelink transmissions in multiple channels in multiple consecutive slots. The channel access priority class value of 121 may be 1. The channel access priority class value of 122 may be 3. When the terminal device 1 performs the multi-channel access procedure to transmit 121 and 122, the terminal device 1 may select a maximum channel access priority class value among multiple channel access priority class values ​​associated with 121 and 122. Since the channel access priority class value of 121 is 1 and the channel access priority class value of 122 is 3, the terminal device 1 may select the channel access priority class value 3 of 122, which has the largest channel access priority class value. The terminal device 1 uses the channel set C for the transmission of 121 and 122. The channel access priority class value selected in the multi-channel access procedure may be used on the channel on which Type 1 channel access procedure is performed. The terminal device 1 may use the channel access priority class value 3 on the channel on which Type 1 channel access procedure is performed in the multi-channel access procedure. The terminal device 1 may When performing Type 1 channel access on each channel of channel set C in the multi-channel access procedure, the terminal device 1 may use a channel access priority class value of 3 on each channel. In other words, when the terminal device 1 performs Type 1 channel access procedure on each channel of RB set #0, RB set #1, and RB set #2, the terminal device 1 may use a channel access priority class value of 3 on each channel of RB set #0, RB set #1, and RB set #2. The terminal device 1 may perform Type 1 channel access procedure using the class value 3. In the multi-channel access procedure, when a Type 1 channel access procedure is performed on one channel of a set C of channels and a Type 2A channel access procedure is performed on the other channels, the terminal device 1 performs a channel access procedure on the channel on which the Type 1 channel access procedure is performed. The access priority class value 3 may be used. When the terminal device 1 selects the RB set #0 as the channel on which the Type 1 channel access procedure is performed, the terminal device 1 selects the RB Channel access priority class for Type 1 channel access procedure in set#0 Alternatively, the value 3 may be used. The terminal device 1 may perform Type 2A channel access procedure in the RB set #1 and the RB set #2. 121 may be referred to as a first sidelink transmission. When the terminal device 1 performs a Type 1 channel access procedure on one channel of the set C of channels and a Type 2A channel access procedure on the other channels in the multi-channel access procedure, the channel on which the Type 1 channel access procedure is performed may be referred to as a first channel. When device 1 performs Type 1 channel access procedure on one channel of channel set C and Type 2A channel access procedure on another channel in the multi-channel access procedure, the channel on which Type 2A channel access procedure is performed may be referred to as a second channel. RB set#0 may be referred to as channel#0. RB set#1 may be referred to as channel#1. RB set#2 may be referred to as channel#2.

[0307] The channel on which the sidelink transmission with respect to the highest channel access priority class value takes place may be different from the channel on which the Type 1 channel access procedure takes place. For example, in FIG. 12, the channel access priority class value of 121 may be 1. The channel access priority class value of 122 may be 3. The transmission of 122 may be associated with the largest channel access priority class value. RB set#1 and RB set#2 may be channels for which sidelink transmissions are performed with the largest channel access priority class value associated with them. When the terminal device 1 performs Type 1 channel access procedure with RB set#0 in the multi-channel access procedure, the terminal device 1 may use a channel access priority class value of 3.

[0308] FIG. 13 shows a case where the terminal device 1 according to one embodiment of the present invention has one or more consecutive slots. FIG. 1 is a diagram showing an example of a process of a multi-channel access procedure for performing multiple sidelink transmissions in multiple channels in a terminal device 1. The terminal device 1 performs multiple sidelink transmissions in one or multiple consecutive slots. The terminal device 1 starts a multi-channel access procedure to perform multiple sidelink transmissions in multiple channels in a Type 1 channel access procedure (S131). The terminal device 1 selects a maximum channel access priority class value among the channel access priority class values ​​associated with the multiple sidelink transmissions (S132). The terminal device 1 applies the selected channel access priority class value to the channel in which the Type 1 channel access procedure is performed (S133).

[0309] As described above, in the embodiment of the present invention, when the terminal device 1 applies a multi-channel access procedure to perform multiple sidelink transmissions on multiple channels in one or more consecutive slots, the terminal device 1 may select a maximum channel access priority class value among multiple channel access priority class values ​​associated with the multiple sidelink transmissions, and use the selected channel access priority class value in the channel on which Type 1 channel access prcedure is performed in the multi-channel access procedure. When applying the multi-channel access procedure to perform multiple sidelink transmissions, the channel on which the Type 1 channel access procedure is performed in the multi-channel access procedure is In this way, it is possible to fairly select the channel access priority class value to be used in the rule.

[0310] In a second embodiment of the present invention, the terminal device 1 transmits a signal in one or more consecutive slots. In the case where the terminal device 1 performs a multi-channel access procedure to perform multiple sidelink transmissions in multiple channels, and performs a Type 1 channel access procedure in one channel and a Type 2A channel access procedure in another channel, the terminal device 1 performs a multi-channel access procedure to perform multiple sidelink transmissions in multiple channels in a single channel. The channel on which the sidelink transmission is performed is Type 1, and the channel access priority class value associated with the sidelink transmission is the largest among the multiple channel access priority class values ​​associated with the transmission. The terminal device 1 may perform a channel access procedure. or for multiple sidelink transmissions on multiple channels in multiple consecutive slots. In the case where a multi-channel access procedure is performed to start channel occupancy by performing a Type 1 channel access procedure in one channel and a Type 2A channel access procedure in another channel, the terminal device 1 performs the Type 1 channel access procedure in the channel in which the sidelink transmission is performed and which is associated with the largest channel access priority class value among multiple channel access priority class values ​​associated with multiple sidelink transmissions. For each sidelink transmission, one channel access priority class value may be associated. The terminal device 1 transmits on a set C of channels. After the multi-channel access procedure is successful for the set of channels C, the terminal device 1 may perform a multi-channel access procedure for the first sidelink transmission. The first sidelink transmission may be followed by a second sidelink transmission within an initiated channel occupancy in a set C of channels. Here, the multi-channel access procedure may comprise a Type 1 channel access procedure in some channels of the set C and a Type 2A channel access procedure in other channels. The first and second sidelink transmissions may be performed on multiple channels in one or more consecutive slots. In the case where the terminal device 1 applies a multi-channel access procedure to perform the first sidelink transmission and the second sidelink transmission, the terminal device 1 may select a maximum channel access priority class value among the multiple channel access priority class values ​​associated with the first sidelink transmission and the second sidelink transmission. The terminal device 1 may perform a Type 1 channel access procedure on a channel on which the sidelink transmission is performed, the selected channel access priority class value being associated with the selected channel access priority class value. If the channel access priority class value of the first sidelink transmission is the largest, the terminal device 1 may perform Type 1 channel access procedure on the channel on which the first sidelink transmission is performed. If the access priority class value is the highest, the UE may perform a Type 1 channel access procedure on the channel on which the second sidelink transmission is to be performed. The terminal device 1 may perform a third sidelink transmission within the channel occupancy after the second sidelink transmission. In this case, the multiple sidelink transmissions may include the first sidelink transmission, the second sidelink transmission, and the third sidelink transmission. The third sidelink transmission may be a transmission using one RB set.

[0311] For example, in FIG. 12, 121 uses RB set #0, RB set #1, and RB set #2. The terminal device 1 may transmit the first sidelink using RB set #0 and The terminal device 1 may perform a multi-channel access procedure for RB set #0, RB set #1, and RB set #2. The set C of channels may be composed of RB set #0, RB set #1, and RB set #2. The terminal device 1 may transmit 121 when the multi-channel access procedure is successful. The terminal device 1 may transmit 122 within the channel occupancy started for the transmission of 121. The transmissions of 121 and 122 may be multiple sidelink transmissions in multiple channels in multiple consecutive slots. The channel access priority class value of 121 may be 1. The channel access priority class value of 122 may be 3. When the terminal device 1 performs the multi-channel access procedure to transmit 121 and 122, the terminal device 1 may select a maximum channel access priority class value among multiple channel access priority class values ​​associated with 121 and 122. Here, since the channel access priority class value of 121 is 1 and the channel access priority class value of 122 is 3, the terminal device 1 may select the channel access priority class value 3 of 122, which has the largest channel access priority class value. When the terminal device 1 executes a multi-channel access procedure to perform multiple sidelink transmissions on multiple channels in one or more consecutive slots and executes Type 1 channel access procedure on one channel and Type 2A channel access procedure on another channel, the Type 1 channel access procedure is executed on the channel on which the transmission of 122 is performed. In other words, the terminal device 1 may perform a Type 1 channel access procedure on either the RB set #1 or the RB set #2. When the terminal device 1 performs Type 1 channel access procedure in RB set #2, it may perform Type 2A channel access procedure in RB set #0 and RB set #1. 121 may be referred to as a first sidelink transmission. 122 may be referred to as a second sidelink transmission. When the terminal device 1 performs Type 1 channel access procedure in one channel of channel set C in the multi-channel access procedure and Type 2A channel access procedure in the other channels, the channel on which the Type 1 channel access procedure is performed is the first channel. In the multi-channel access procedure, the terminal device 1 may be referred to as a set C If one of the channels performs Type 1 channel access procedure and the other performs Type 2A channel access procedure, the channel in which Type 2A channel access procedure is performed is The channel may be referred to as a second channel. RB set#0 may be referred to as channel#0. RB set#1 may be referred to as channel#1, and RB set#2 may be referred to as channel#2.

[0312] Each sidelink transmission of multiple sidelink transmissions is PSCCH / PSSCH, PSSCH, PSFCH, S-SSB The multiple sidelink transmissions may be MCSt transmissions of multiple TBs. The first sidelink transmission may be a first sidelink transmission among the multiple sidelink transmissions. The second sidelink transmission may be a subsequent sidelink transmission among the multiple sidelink transmissions after the first sidelink transmission. The first sidelink transmission may be a transmission using one RB set. The second sidelink transmission may be a transmission using one RB set. The first sidelink transmission may be a transmission using one RB set. The RB sets used for the first sidelink transmission and the second sidelink transmission may be different. When the RB sets used for the first sidelink transmission and the second sidelink transmission are different, the terminal device 1 may perform a multi-channel access procedure for all RB sets used for the first sidelink transmission and the second sidelink transmission. For example, when the terminal device 1 uses RB set#0 and RB set#1 for the first sidelink transmission and RB set#1 and RB set#2 for the second sidelink transmission, the terminal device 1 may perform a multi-channel access procedure for RB set#0, RB set#1, and RB set#2. The terminal device 1 may perform a multi-channel access procedure for the first sidelink transmission. The terminal device 1 may use RB set #0 and RB set #1 for the first sidelink transmission and RB set #2 for the second sidelink transmission. In this case, the terminal device 1 performs multi-channel for the RB set #0, the RB set #1, and the RB set #2. The terminal device 1 may perform a channel access procedure. In the case where the terminal device 1 uses RB set #0 for the first sidelink transmission and RB set #1 for the second sidelink transmission, the terminal device 1 may perform a multi-channel access procedure for RB set #0 and RB set #1.

[0313] As described above, in the embodiment of the present invention, the terminal device 1 is configured to receive one or more consecutive slots. A multi-channel access procedure is performed to allow multiple sidelink transmissions on multiple channels in a single hop, and Type 1 channel access procedure is performed on one channel and Type 2 channel access procedure is performed on the other channels. When executing the Type 2A channel access procedure on a channel, the terminal device 1 may also execute the Type 1 channel access procedure on a channel on which a sidelink transmission is performed that is associated with a maximum channel access priority class value among a plurality of channel access priority class values ​​associated with a plurality of sidelink transmissions. 1 The channel access priority used on the channel where the channel access procedure is performed. Therefore, the reliability class values ​​can be chosen fairly.

[0314] When applying a multi-channel access procedure to perform multiple sidelink transmissions on multiple channels in one or multiple consecutive slots, the terminal device 1 includes a control unit that selects a maximum channel access priority class value among multiple channel access priority class values ​​associated with the multiple sidelink transmissions, and a control unit that selects a maximum channel access priority class value among multiple channel access priority class values ​​associated with the multiple sidelink transmissions. The priority class value is used in the multi-channel access procedure for a channel on which Type 1 channel access procedure is performed, and multiple channels are accessed in one or more consecutive slots. and a transmitter for transmitting a plurality of sidelink transmissions in the channel.

[0315] The present embodiment may be performed in an unlicensed band where channel sensing is performed. The unlicensed band may be referred to as a shared spectrum. The unlicensed band may be referred to as an unlicensed spectrum.

[0316] The base station device 3 and the terminal device 1 according to the present invention may operate as a program for controlling a CPU (Central Processing Unit) or the like (a program for making a computer function) so as to realize the functions of the above-described embodiment of the present invention. Information handled by these devices is temporarily stored in a RAM (Random Access Memory) during processing. Then, various ROMs such as Flash ROM (Read Only Memory) and HDD (Hard Disk Drive) The data is stored in the EEPROM and is read, modified, and written by the CPU as necessary.

[0317] In addition, a part of the terminal device 1 and the base station device 3 in the above-mentioned embodiment may be realized by a computer. In that case, a program for realizing this control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read into a computer system and executed to realize the control function.

[0318] The "computer system" referred to here is a computer system built into the terminal device 1 or the base station device 3, and includes hardware such as an OS and peripheral devices. Also, the "computer-readable recording medium" refers to portable media such as flexible disks, optical magnetic disks, ROMs, and CD-ROMs, and hard disks built into the computer system. This refers to storage devices such as hard disks.

[0319] Furthermore, the term "computer-readable recording medium" may include a medium that dynamically stores a program for a short period of time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, and a medium that stores a program for a certain period of time, such as a volatile memory inside a computer system that serves as a server or client in such a case. The above program may be one that realizes part of the above-mentioned functions, or may be one that can realize the above-mentioned functions in combination with a program already recorded in the computer system.

[0320] The terminal device 1 may be configured to include at least one processor and at least one memory including computer program instructions (computer program). The memory and computer program instructions (computer program) may be configured to cause the terminal device 1 to perform the operations and processes described in the above embodiments using the processor. The base station device 3 may be configured to include at least one processor and at least one memory including computer program instructions (computer program). The memory and computer program instructions (computer program) may be configured to cause the base station device 3 to perform the operations and processes described in the above embodiments using the processor.

[0321] Furthermore, the base station device 3 in the above-described embodiment can also be realized as an aggregate (device group) consisting of a plurality of devices. Each of the devices constituting the device group may have some or all of the functions or functional blocks of the base station device 3 according to the above-described embodiment. It is sufficient for the device group to have all of the functions or functional blocks of the base station device 3. Furthermore, the terminal device 1 according to the above-described embodiment can also communicate with the base station device as an aggregate.

[0322] In addition, the base station device 3 in the above-mentioned embodiment is an EUTRAN (Evolved Universal Terrestrial Radio Access Network) and / or an NG-RAN (NextGen RAN, NR RAN). In addition, the base station device 3 in the above-described embodiment may be configured to It may have some or all of the functionality of its superior node.

[0323] Furthermore, some or all of the terminal device 1 and base station device 3 in the above-described embodiment may be realized as an LSI, which is typically an integrated circuit, or may be realized as a chip set. Each functional block of the terminal device 1 and the base station device 3 may be individually integrated into a chip, or may be integrated into a chip in part or in whole. The integrated circuit method is not limited to LSI, but may be a dedicated circuit, It may also be realized by a general-purpose processor. Also, with the advancement of semiconductor technology, it may be possible to use a centralized processor that replaces LSI. When a technology for integrated circuitry emerges, it is also possible to use integrated circuits based on that technology.

[0324] In addition, in the above-described embodiment, a terminal device is described as an example of a communication device, but the present invention is not limited to this and can also be applied to terminal devices or communication devices such as stationary or non-movable electronic devices installed indoors or outdoors, for example, AV equipment, kitchen equipment, cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other household appliances.

[0325] Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like within the scope of the gist of the present invention are also included. Furthermore, the present invention can be modified in various ways within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. Furthermore, configurations in which elements described in the above embodiments are replaced with elements that have the same effect are also included. [Explanation of symbols]

[0326] 1(1A, 1B, 1C) Terminal equipment 3(3A, 3B, 3C) Base station equipment 10, 30 Radio transmitter / receiver 11, 31 Antenna section 12, 32 RF section 13, 33 Baseband section 14, 34 Upper layer processing unit 15, 35 Media access control layer processing unit 16, 36 Radio resource control layer processing unit

Claims

1. A terminal device comprising a processor and a memory for storing computer program code, the terminal device being configured to transmit a plurality of channels in one or more consecutive slots. applying a multi-channel access procedure to perform a Type 1 sidelink transmission; selecting a maximum channel access priority class value among a plurality of channel access priority class values ​​associated with the plurality of sidelink transmissions; and using the channel access priority class value selected in the multi-channel access procedure on a channel for which a Type 1 channel access procedure is performed.

2. The channel on which the sidelink transmission associated with the largest channel access priority class value is made is The channel on which the Type 1 channel access procedure is performed is different from the channel on which the Type 1 channel access procedure is performed.

2. A terminal device as described in claim 1.

3. A communication method for use in a terminal device, comprising: applying a multi-channel access procedure for a plurality of sidelink transmissions on a channel of said type 1 channel; selecting a highest channel access priority class value among a plurality of channel access priority class values ​​associated with said plurality of sidelink transmissions; and using the channel access priority class value selected in the multi-channel access procedure on a channel for which a Type 1 channel access procedure is performed.

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