Terminal device and communication method

Abstract

It enables communication between terminal devices while ensuring fair channel access. [Solution] The duration of the CPE is determined based on whether the PSCCH / PSSCH transmission is an initial transmission or not. The duration of the aforementioned CPE is applied to the PSCCH / PSSCH transmission, and the PSCCH / PSSCH transmission is performed.

Description

[Technical Field]

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

[0002] Cellular mobile communication radio access methods and radio networks (hereinafter referred to as "Long Term Evolution (LTE)" or "EUTRA: Evolved Universal Terrestrial Radio Access") This is referred to as [a specific term]. This is being considered in the 3rd Generation Partnership Project (3GPP). In LTE, base station equipment is also called eNodeB (evolved NodeB), and terminal equipment is also called UE (User Equipment). LTE is a cellular communication system in which multiple base station devices are arranged in a cell-like structure to cover different areas. A single base station device may manage multiple serving cells.

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

[0004] NR supports sidelink technology, which allows terminal devices to communicate directly with each other without going through a base station. Furthermore, the application of sidelink technology in the unlicensed spectrum is being considered (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 [Overview of the project] [Problems that the invention aims to solve]

[0006] In unlicensed bands, LBT (Listen Before Talk) based on CCA (Clear Channel Assessment) is used to ensure coexistence with other systems. In Japan, Europe, and other regions, LBT functionality is mandated for systems operating in the 5GHz unlicensed band. One aspect of the present invention provides a terminal device capable of achieving fair channel access in an environment where multiple systems' equipment (terminal devices, base station devices, access points, etc.) may coexist, and a communication method used with the terminal device. [Means for solving the problem]

[0007] (1) A first aspect of the present invention is a terminal device comprising: a control unit that determines the duration of a CPE based on whether a PSCCH / PSSCH transmission is an initial transmission; and a control unit that determines the duration of the CPE based on whether a PSCCH / PSSCH transmission is an initial transmission. A terminal device comprising a transmitting unit that applies to a signal and transmits in a certain slot.

[0008] (2) A second aspect of the present invention is a communication method for a terminal device, wherein the duration of the CPE is determined based on whether the PSCCH / PSSCH transmission is an initial transmission, and the duration of the CPE is used for the PSCCH / PSSCH transmission Apply to the message and send it in a specific slot. [Effects of the Invention]

[0009] According to this invention, communication between terminal devices can be performed while realizing fair channel access.

Brief Description of the Drawings

[0010] [Figure 1] It is a conceptual diagram of a wireless communication system according to one aspect of the present embodiment. [Figure 2] It is a schematic diagram showing an example of a resource grid in a subframe according to one aspect of the present embodiment. [Figure 3] It is a schematic block diagram showing the configuration of terminal device 1 according to one aspect of the present embodiment. [Figure 4] It is a schematic block diagram showing the configuration of base station device 3 according to one aspect of the present embodiment. [Figure 5] It is a diagram showing an example of an interleaving mapping according to one aspect of the present embodiment. [Figure 6] It is a diagram showing an example of the arrangement of PSCCH monitored in terminal device 1 according to one aspect of the present embodiment. [Figure 7] It is a diagram showing an example of the arrangement of PSCCH monitored in terminal device 1 according to one aspect of the present embodiment. [Figure 8] It is a diagram showing an example of a resource selection procedure in terminal device 1 according to one aspect of the present embodiment. [Figure 9] It is a diagram showing an example of the process of determining the duration of CPE of terminal device 1 according to one aspect of the present embodiment.

Modes for Carrying Out the Invention

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

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

[0013] The indication that a parameter or information indicates one or more values means that the parameter or the information It may include at least one parameter or piece of information indicating such one or more values. A top-level parameter may be a single top-level parameter. A top-level parameter may also be an information element (IE) containing multiple parameters.

[0014] Figure 1 is a conceptual diagram of a wireless communication system according to one embodiment of this model. In Figure 1, the wireless communication system comprises terminal devices 1A to 1C and a base station device 3 (gNB). Hereinafter, terminal devices 1A to 1D will also be referred to as terminal device 1 (UE).

[0015] The base station device 3 may be configured to include one or both of an MCG (Master Cell Group) and an SCG (Secondary Cell Group). The MCG is a group of serving cells comprising at least a PCell (Primary Cell). The SCG comprises at least a PSCell (Primary Cell). It is a group of serving cells that include a Secondary Cell. PCell is an initial connection establishment procedure performed by terminal device 1, or the cell in which the connection re-establishment procedure is performed ( This is the cell in which the procedure was performed. The PSCell is a random access procedure performed by terminal device 1. It is a serving cell. The MCG consists of one or more SCells (Secondary Cells). It may be made. The SCG may consist of one or more SCells. Serving A serving cell identity is a short identifier used to identify a serving cell. Yes, it exists. The serving cell identifier may be provided by a higher-level parameter.

[0016] Serving cell groups (cell groups) include MCG, SCG, and PUCCH cell groups. This is a general term for a serving cell group. A serving cell group is one or more serving cells (or a co It may include component carriers. One or more components may be included in the serving cell group. A number of serving cells (or component carriers) may be operated by carrier aggregation.

[0017] Base station device 3 uses different frequency bands (carrier frequency, frequency spectrum) Communicate with terminal device 1. This operation (multi-carrier operation) is performed. This may also be called carrier aggregation or dual connectivity. Different cells (serving cells) use different frequency bands. In the base station equipment 3 and terminal equipment 1, the multiple cells used in carrier aggregation are such that one cell is downlink The uplink frequency band and the uplink frequency band may be used, while other cells may use only the downlink frequency band, or other cells may use both the downlink frequency band and the uplink frequency band. Terminal device 1 makes an initial connection with base station device 3, and base station device 3 After the connection is established, connections to multiple cells are added. Terminal device 1 is used for communication A frequency band is added. Terminal device 1 has additional cells (serving cells) used for communication. Terminal device 1 will have an additional connection to base station device 3.

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

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

[0020] CP-OFDM may be used for the side link between terminal device 1 and terminal device 1. A DFT-s-OFDM may be used for the side link between device 1 and terminal device 1.

[0021] As shown in Figure 1, the base station device 3 is one transceiver (or transmission point, transmission device, It may be composed of a receiving point, a receiving device, and a transmitting / receiving point. On the other hand, in some cases, the base station device 3 may be configured to include a plurality of transmitting / receiving devices. When the base station device 3 is composed of a plurality of transmitting / receiving devices, each of the plurality of transmitting / receiving devices may be arranged at geographically different positions.

[0022] For a certain subcarrier spacing setting μ, the subcarrier spacing (SCS: SubCarrier Spacing) Δf may be Δf = 2 μ × 15 kHz. For example, the subcarrier spacing setting μ may indicate any one of 0, 1, 2, 3, and 4.

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

[0024] The transmission of downlink / uplink signals may be organized by a radio frame (system frame, frame) of length Tf. Here, Tf = (Δfmax × Nf / 100) × Ts = 10 ms may be used.

[0025] The transmission of sidelink signals may be organized by a radio frame (system frame, frame) of length Tf. Here, Tf = (Δfmax × Nf / 100) × Ts = 10 ms may be used.

[0026] A wireless frame may consist of 10 subframes. Here, the length of a subframe may be Tsf = (Δfmax × Nf / 1000) × Ts = 1 ms. Also, per subframe The number of OFDM symbols can be Nsubframe, μsymb = Nslotsymb × Nsubframe, μslot. stomach.

[0027] OFDM symbols are used as time-domain units for communication methods used in wireless communication systems. For example, OFDM symbols may be used as time-domain units for CP-OFDM. The OFDM symbol may also be used as the time-domain unit of DFT-s-OFDM.

[0028] A slot may consist of multiple OFDM symbols. For example, one slot may consist of Nslotsymb consecutive OFDM symbols. For instance, in a normal CP setting, Nslotsymb=14. In an extended CP setting, Nslotsymb=12.

[0029] Slots may be indexed in the time domain. For example, slot index nμs may be given in ascending order as integer values ​​in the range of 0 to Nsubframe,μslot-1 in subframes. Also, slot index nμs,f may be given in ascending order as integer values ​​in the range of 0 to Nframe,μslot-1 in wireless frames.

[0030] Figure 2 shows an example of the configuration of a resource grid according to one aspect of this embodiment. In the resource grid of Figure 2, the horizontal axis is the OFDM symbol index lsym, and the vertical axis is the subcarrier index ksc. The resource grid of Figure 2 has Nsize, μgrid, x×NRBsc elements. It includes subcarriers and contains Nsubframes and μsymb OFDM symbols. Here, Nsize, μgrid, and x represent the bandwidth of the SCS intrinsic carriers. The units of the values ​​of Nsize, μgrid, and x are resource blocks.

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

[0032] A Resource Block (RB) contains NRBsc consecutive subcarriers. Resource blocks include common resource blocks, physical resource blocks (PRBs), and virtual resource blocks (VRBs). It is a general term. For example, NRBsc = 12 is also acceptable.

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

[0034] The BWP set for a side link is also called the side link BWP.

[0035] Carrier aggregation is the aggregation of multiple servings Communication may be performed using cells. Alternatively, carrier aggregation may be performed using multiple aggregated component carriers. Carrier aggregation may involve communication using multiple aggregated downlink component carriers. Similarly, carrier aggregation may involve communication using multiple aggregated uplink component carriers.

[0036] The following describes an example of the configuration of a terminal device 1 according to one aspect of this embodiment.

[0037] Figure 3 is a schematic block diagram showing the configuration of a terminal device 1 according to one aspect of this embodiment. As shown in the figure, the terminal device 1 is configured to include a wireless transceiver 10 and a higher-layer processing unit 14. The wireless transceiver unit 10 includes an antenna unit 11, an RF (Radio Frequency) unit 12, and a base bar. The upper layer processing unit 14 is composed of at least part or all of the end unit 13. The upper layer processing unit 14 is composed of at least part or all of the media access control layer processing unit 15 and the wireless resource control layer processing unit 16. The wireless transceiver unit 10 is also referred to as the transmit unit, the receive unit, or the physical layer processing unit.

[0038] The wireless transceiver unit 10 performs physical layer processing.

[0039] For example, the wireless transceiver 10 may generate the baseband signal for the uplink physical channel. Here, the transport blocks delivered from the upper layer on the UL-SCH may be located on the uplink physical channel. For example, the wireless transceiver 10 may generate the baseband signal for the uplink physical signal.

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

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

[0042] The receiving unit of terminal device 1 receives the PDCCH. The receiving processing unit of terminal device 1 receives the downlink frequency. This process receives PDCCH signals across multiple bandwidths (cell, component carrier, carrier). The receiving processing unit of terminal device 1 performs demodulation, decoding, and other processing on PDCCH. The signal processing unit receives the PDCCH and performs a process to detect downlink control information.

[0043] The receiving unit of terminal device 1 receives the PDSCH. The receiving processing unit of terminal device 1 receives the downlink frequency. This process receives PDSCH signals across multiple bandwidths (cell, component carrier, carrier). The receiving processing unit of terminal device 1 performs demodulation, decoding, and other processing on the PDSCH.

[0044] The receiving unit of terminal device 1 receives the PSCCH. The receiving processing unit of terminal device 1 performs demodulation, decoding, and other processing on the PSCCH. The receiving processing unit of terminal device 1 performs processing to receive the PSCCH and processes to detect sidelink control information. The receiving unit of terminal device 1 determines the frequency resources (interlace, resource block, described later) that constitute the PSCCH. The receiving unit of terminal device 1 This determines the OFDM symbol in which PSCCH may be placed. The receiving unit of terminal device 1 blocks PSCCH. Indian decoding. The receiving unit of terminal device 1 blind decodes PSCCH in one slot within one resource pool. The receiving unit of terminal device 1 blind decodes two or more slots within one resource pool. The PSCCHs within the lot may be blind-decoded. The receiving unit of terminal device 1 uses one resource plan. Two or more PSCCHs in one slot within the same slot may be blind-decoded. Terminal device 1 The signal unit receives the PSSCH. The receiving processing unit of terminal device 1 performs demodulation, decoding, and other processing on the PSSCH. The process is carried out. The receiving unit of terminal device 1 receives PSFCH. The receiving processing unit of terminal device 1 receives HARQ-ACK on PSFCH.

[0045] The transmitting unit (also called the transmitting processing unit) of terminal device 1 transmits a HARQ-ACK. The transmitting processing unit of terminal device 1 transmits a HARQ-ACK to the PDSCH. The transmitting processing unit of terminal device 1 transmits a HARQ-ACK in the uplink frequency band (cell, component carrier, carrier).

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

[0047] The transmitting unit of terminal device 1 transmits a PSCCH. The transmitting processing unit of terminal device 1 performs encoding, modulation, and other processing on the PSCCH. The transmitting processing unit of terminal device 1 performs processing to transmit sidelink control information using the PSCCH. The transmitting unit of terminal device 1 determines the frequency resources (interlace, resource block, described later) that constitute the PSCCH. The transmitting unit of terminal device 1 determines the OFDM symbols on which the PSCCH may be placed. The transmitting unit of terminal device 1 transmits a PSSCH. The transmitting processing unit of terminal device 1 performs encoding, modulation, and other processing on the PSSCH.

[0048] The upper layer processing unit 14 outputs the uplink data (transport block) generated by user operations, etc., to the wireless transceiver unit 10. The upper layer processing unit 14 processes the MAC layer and packet data. It performs processing at the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the RRC layer.

[0049] The upper layer processing unit 14 outputs sidelink data (transport block) to the wireless transceiver unit 10.

[0050] The media access control layer processing unit (MAC layer processing unit) 15, which is part of the upper layer processing unit 14, performs MAC layer processing.

[0051] The wireless resource control layer processing unit 16, which is part of the upper layer processing unit 14, performs RRC layer processing. The source control layer processing unit 16 manages various setting information / parameters (RRC parameters) of its own device. The wireless resource control layer processing unit 16 performs the following based on the upper layer signals received from the base station device 3. Then, set various settings / parameters (RRC parameters). That is, wireless resource The 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. Furthermore, this configuration information may include information related to the processing or configuration of physical channels and physical signals (i.e., the physical layer), MAC layer, PDCP layer, RLC layer, and RRC layer. These parameters are higher layer parameters. Lameta is fine.

[0052] For example, the wireless resource control layer processing unit 16 receives an RRC message on a certain logical channel. The included RRC parameters are retrieved, and the retrieved RRC parameters are stored in the memory area of ​​terminal device 1. It is also possible to set the RRC parameters in the memory area of ​​terminal device 1 and provide them to the lower layer.

[0053] The wireless resource control layer processing unit 16 sets the control resource set based on the RRC signaling received from the base station device 3. The wireless resource control layer processing unit 16 sets (configures) the search area within the control resource set. The wireless resource control layer processing unit 16 sets (configures) the PDCCH candidates to be monitored within the control resource set. The wireless resource control layer processing unit 16 Set (configure) the number of PDCCH candidates to monitor within the control resource set. The source control processing unit 16 sets (configures) the aggregation level of PDCCH candidates monitored within the control resource set.

[0054] The wireless resource control layer processing unit 16 monitors the DCI format within the control resource set. The wireless resource control layer processing unit 16 sets the DCI format monitored within the search area. A set may be configured. The wireless resource control layer processing unit 16 configures the DCI format to be monitored within the control resource set based on the RRC signaling indicated by the base station device 3. The wireless resource control layer processing unit 16 may set the DCI format to be monitored within the search area based on the RRC signaling indicated by the base station device 3. This sets one or more DCI formats to be monitored in the receiving processing unit.

[0055] The wireless resource control layer processing unit 16 configures settings for multiple search areas. Each of these settings for multiple search areas is indexed.

[0056] The wireless resource control layer processing unit 16 configures settings related to CSI feedback (transmission of channel status information) based on RRC signaling received from the base station device 3. The layer processing unit 16 sets the transmission period of the CSI feedback, the transmission start timing (offset) of the CSI feedback, the type of information of the CSI feedback, etc. Wireless resource control The layer processing unit 16 configures settings related to multiple CSI feedbacks. Each of these CSI feedback settings is indexed.

[0057] The wireless resource control layer processing unit 16 configures the SPS based on the RRC signaling received from the base station device 3. The wireless resource control layer processing unit 16 configures the SPS resources (PDSCH resources) The period of SPS, the start timing (offset) of SPS resources (PDSCH resources), SPS The number of HARQ processes to be set, and the HARQ process ID used for SPS. Set the available offset, the RNTI value for SPS scheduling, etc. Wireless The source control layer processing unit 16 configures settings for multiple SPSs. Each of the settings for multiple SPSs is indexed.

[0058] The radio resource control layer processing unit 16 configures carrier aggregation based on RRC signaling received from the base station device 3. The radio resource control layer processing unit 16 configures serving cells (secondary cells, primary secondary cells) as part of the carrier aggregation configuration. A serving cell may consist of a downlink component carrier. A serving cell may consist of both a downlink component carrier and an uplink component carrier. The radio resource control layer processing unit 16 controls the radio transceiver 10 to perform reception processing on the downlink component carrier configured in the carrier aggregation configuration. The radio resource control layer processing unit 16 controls the radio transceiver 10 to perform transmission processing on the uplink component carrier configured in the carrier aggregation configuration.

[0059] The wireless resource control layer processing unit 16 configures the sidelink based on the RRC signaling received from the base station device 3. The parameters related to the notified sidelink are set. The parameters related to the sidelink will be described later. For example, the wireless resource control layer processing unit 16 sets the parameters related to the OFDM system where the PSCCH may be located. The bandwidth is set. For example, the wireless resource control layer processing unit 16 sets the bandwidth in which the PSCCH is located. The settings are configured. For example, the wireless resource control layer processing unit 16 sets the number of resource blocks or interlaces that make up one PSCCH. The wireless resource control layer processing unit 16 also makes settings related to PSCCH transmission and reception for the wireless transceiver unit 10.

[0060] The media access control layer processing unit (MAC layer processing unit) 15 activates / deactivates the secondary cell based on the MAC CE (MAC Control Element) received from the base station device 3. The operation is performed. The media access control layer processing unit (MAC layer processing unit) 15 is a secondary cell. Based on MAC CEs (SCell Activation / Deactivation MAC CEs) containing activation / deactivation information, multiple components are configured by the wireless resource control layer processing unit 16. Information indicating activation / deactivation for the serving cell is output to the wireless transceiver 10. The media access control layer processing unit (MAC layer processing unit) 15 is based on a timer. Next, the secondary cell is deactivated. The media access control layer processing unit (MAC layer processing unit) 15 determines, by measuring with a timer, that no scheduling has been performed on the serving cell by the base station device 3 for a certain period of time, and deactivates the serving cell and controls the wireless transceiver unit 10.

[0061] The media access control layer processing unit (MAC layer processing unit) 15 performs sidelink HARQ operations. Sidelink scheduling request, sidelink buffer status report, CSI Process the report.

[0062] The wireless resource control layer processing unit 16 generates functional information based on the functions provided by the terminal device 1. This may be included in the RRC message and transmitted to the base station device 3.

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

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

[0065] The wireless transceiver unit 10 stops various receiving and transmitting processes in a deactivated serving cell. For example, the wireless transceiver unit 10 stops monitoring the PDCCH in a deactivated serving cell. In the activating cell, reception of PDSCH is stopped. For example, the wireless transceiver 10 is deactivated. In the serving cell, SRS transmission is stopped. For example, the wireless transceiver 10 is non Stop transmitting PUSCH signals in activated serving cells.

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

[0067] The baseband section 13 converts the analog signal input from the RF section 12 into a digital signal. The baseband section 13 then converts the converted digital signal to a CP (Cyclic Prefix) equivalent to The CP portion is removed. The baseband section 13 performs a Fast Fourier Transform (FFT) on the signal from which the CP has been removed to extract the signal in the frequency domain.

[0068] The baseband section 13 performs an inverse fast Fourier transform (IFFT) on the physical signal to generate an OFDM symbol. A CP is added to the signal 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 section 12 uses a low-pass filter to filter the analog signal input from the baseband section 13. The RF unit 12 removes excess frequency components, upconverts the analog signal to the carrier frequency, and generates an RF signal. The RF unit 12 transmits the RF signal via the antenna unit 11. The RF unit 12 also amplifies power. The RF unit 12 may also have a function to control the transmission power. The RF unit 12 is also referred to as the transmission power control unit.

[0070] The wireless transceiver 10 performs carrier sensing (LBT) before transmitting a signal to avoid signal collisions with other devices. The following types of LBT are used. Type 1: Random backoff using a contention window with variable size. LBT performs the process • Type 2A: LBT without random backoff process, performing 25us carrier sense before signal transmission. • Type 2B: LBT without a random backoff process and performs 16us carrier sense before signal transmission. • Type 2C: LBT is not performed.

[0071] The wireless transceiver 10 transmits a signal only after detecting that there is no transmission from other devices during listening (idle state), and does not transmit a signal if it detects that there is transmission from other devices during listening (busy state). The wireless transceiver 10 transmits a signal only after detecting that the LBT result is idle. If the transmission opportunity is available, the transmission is performed; if the LBT result is busy, the transmission is not performed. The time available for transmission is called Channel Occupancy Time (COT). In LBT, terminal device 1 monitors the channel before transmitting data and evaluates idle channels. This process is performed, and data is sent only after it is confirmed that the channel is idle.

[0072] When the wireless transceiver 10 performs a random backoff process, after the previous transmission, it randomly generates a backoff counter value within the contention window size. In random backoff, the terminal device 1 uses the random backoff counter to chat at each time interval. The wireless transceiver 10 evaluates whether a channel is idle by detecting the channel energy. The wireless transceiver 10 waits for a certain period of time until it confirms that the channel is idle, and performs carrier sensing (sensing) at each sensing slot time. If the wireless transceiver 10 finds that the channel is idle as a result of carrier sensing, it decreases the backoff counter value. If the wireless transceiver 10 finds that the channel is busy as a result of carrier sensing, it maintains the backoff counter value and waits for a certain period of time until it confirms that the channel is idle, and then performs carrier sensing again. After repeating the above operations, the wireless transceiver 10 can gain access to the channel and start transmitting a signal on that channel once the backoff counter value reaches zero.

[0073] When HARQ-ACK feedback is applied to a sidelink, the wireless transceiver 10 updates the contention window size based on the HARQ-ACK status. If the HARQ-ACK status is ACK, the wireless transceiver 10 minimizes the contention window size. The wireless transceiver 10 sets the contention window size to the next largest value if the HARQ-ACK status is NACK. If the contention window size reaches the maximum possible value, the wireless transceiver 10 continues to use the maximum value even if the HARQ-ACK status is NACK.

[0074] The initial value of the random backoff counter is between 0 and the contention window size. It may be an integer. The contention window size is adjusted before the random backoff counter is initialized so that terminal device 1 can access the channel. The average time is controlled.

[0075] Terminal device 1, before transmitting on the channel, listen before on the channel Execute a Talk (LBT). Terminal device 1 may adjust the amount of time spent executing the LBT. End device 1 can select a random number between zero and the contention window size. Terminal device 1 can obtain an opportunity to transmit and perform a transmission if the channel is available for at least a period of time associated with the random number.

[0076] The following describes an example of the configuration of a base station device 3 according to one aspect of this embodiment.

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

[0078] The upper layer processing unit 34 performs processing at the MAC (Medium Access Control) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the Radio Resource Control (RRC) layer. The MAC layer is also called the MAC sublayer. The PDCP layer is also called the PDCP sublayer. Furthermore, RLC The layer is also called the RLC sublayer. The RRC layer is also called the RRC sublayer.

[0079] The media access control layer processing unit 35, which is part of the upper layer processing unit 34, performs MAC layer processing. The MAC layer processing involves mapping logical channels to transport channels, multiplexing one or more MAC SDUs (Service Data Units) into transport blocks, decomposing transport blocks delivered from the physical layer on the UL-SCH into one or more MAC SDUs, applying HARQ (Hybrid Automatic Repeat reQuest) to transport blocks, and This may include processing some or all of the scheduling requests.

[0080] The wireless resource control layer processing unit 36, located in the upper layer processing unit 34, performs RRC layer processing. RRC layer processing may include some or all of the following: management of broadcast signals, management of RRC connection / RRC idle status, and RRC reconfiguration. The wireless resource control layer processing unit 36 ​​generates or obtains downlink data (transport blocks), system information, RRC messages, MAC CE, etc., which are placed on the PDSCH, from the upper node, and outputs them to the wireless transceiver unit 30.

[0081] Furthermore, the wireless resource control layer processing unit 36 ​​manages various setting information / parameters (RRC parameters) for each terminal device 1. The wireless resource control layer processing unit 36 ​​may also set various setting information / parameters for each terminal device 1 via signals from the upper layer. The source control layer processing unit 36 ​​transmits / notifies information indicating various setting information / parameters. This setting information may include information related to the processing or setting of physical channels and physical signals (i.e., the physical layer), MAC layer, PDCP layer, RLC layer, and RRC layer. These parameters are upper-layer parameters. It may also be a data type. For example, the wireless resource control layer processing unit 36 ​​may transmit an RRC message on a certain logical channel to the terminal device 1, including the RRC parameters. Here, the RRC message may be mapped to one of BCCH (Broadcast Control Channel), CCCH (Common Control Channel), or DCCH (Dedicated Control Channel).

[0082] The wireless resource control layer processing unit 36 ​​may determine the RRC parameters to be transmitted to the terminal device 1 based on the RRC parameters contained in the RRC message transmitted from the terminal device 1. The RRC message transmitted from terminal device 1 may also be related to the reporting of functional information from terminal device 1. stomach.

[0083] The wireless resource control layer processing unit 36 ​​sets a control resource set for the terminal device 1. Multiple PDCCH candidates are configured (set up) within the configured control resource set. The wireless resource control layer processing unit 36 ​​sets a search area for the terminal device 1. Unit 36 ​​sets the DCI format to be monitored in the search area for terminal device 1.

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

[0085] The wireless resource control layer processing unit 36 ​​configures settings for multiple search areas. Each of these settings for multiple search areas is indexed.

[0086] The wireless resource control layer processing unit 36 ​​provides the terminal device 1 with resources for transmitting HARQ-ACK. The wireless resource control layer processing unit 36 ​​sets resources for transmitting HARQ-ACKs to the PDSCH in the downlink frequency band (cell, component carrier, carrier). The source control layer processing unit 36 ​​allocates resources for transmitting HARQ-ACK to the PDSCH via the uplink frequency. Set the wavenumber band (cell, component carrier, carrier).

[0087] The wireless resource control layer processing unit 36 ​​configures the terminal device 1 for CSI feedback (transmission of channel status information). The transmission period, the start timing (offset) of CSI feedback transmission, and the type of CSI feedback information are set. The wireless resource control layer processing unit 36 ​​sets multiple CSI feed Configure the settings related to feedback. Multiple CSI feedback settings are indexed separately. To be laughed at.

[0088] The wireless resource control layer processing unit 36 ​​configures settings related to SPS for the terminal device 1. The wireless resource control layer processing unit 36 ​​configures the period of the SPS resources (PDSCH resources), the start timing (offset) of the SPS resources (PDSCH resources), and the number of HARQ processes to be set for SPS. The Wireless Resource Control Layer Processing Unit 36 ​​sets the offset used to derive the HARQ process ID used for SPS, the RNTI value for SPS scheduling, etc. Configure the settings related to this. Settings for multiple SPS will be indexed separately.

[0089] The wireless resource control layer processing unit 36 ​​sets the carrier aggregation for the terminal device 1. The wireless resource control layer processing unit 36 ​​performs the following: The wireless resource control layer processing unit 36 ​​sets up serving cells (secondary cells, primary secondary cells) as carrier aggregation settings. A serving cell may consist of a downlink component carrier. A serving cell may consist of a downlink component carrier and an uplink component carrier. The wireless resource control layer processing unit 36 ​​performs carrier aggregation for the terminal device 1. The wireless transceiver 30 is controlled to perform transmission processing using the downlink component carrier configured in the above configuration. The wireless resource control layer processing unit 36 ​​controls the carrier to the terminal device 1. The wireless transceiver 30 is controlled to perform reception processing using the uplink component carrier configured in the aggregation configuration.

[0090] The wireless resource control layer processing unit 36 ​​performs sidelink settings for the terminal device 1. The wireless resource control layer processing unit 36 ​​sends parameters related to the side link to the terminal device 1. The settings are configured and notified to the terminal device 1 via the wireless transceiver 30. Paragraphs regarding side links For example, the following information may be used as a meter. • Sidelink BWP configuration • Sidelink wireless bearer configuration • Side link measurement configuration

[0091] Information indicating the configuration of the sidelink BWP is shown in the symbols within the slots used for the sidelink. The starting position, symbol length, PSBCH configuration, sidelink resource pool configuration, etc. This includes information that is shown. Information showing the PSBCH configuration includes information showing parameters used for PSBCH transmit power control. Information showing the sidelink resource pool configuration includes information showing the configuration of the sidelink receive resource pool, the configuration of the sidelink transmit resource pool, etc. The configuration of the sidelink transmit resource pool is the configuration of the transmit resource pool for the method (mode 1) in which the base station device 3 instructs the terminal device 1 on scheduling information. This includes the configuration of a transmission resource pool for a method (mode 2) in which terminal device 1 autonomously selects resources.

[0092] Information indicating the configuration of the sidelink resource pool includes information indicating the configuration of the PSCCH, information indicating the configuration of the PSSCH, information indicating the configuration of the PSFCH, and information indicating the subchannel size of the sidelink. Information indicating the starting position of the side link's subchannels, and the MCS used in the side link. Information indicating the cable, information indicating the configuration of the side link PTRS, and the TDD UL-DL configuration of the side link. Information indicating the number of PRBs in the sidelink resource pool, sidelink resource pool Information indicating the time resources of the link, information indicating the parameters for sidelink transmit power control, information indicating the maximum number of reserved PSCCH / PSSCH resources that can be represented by one SCI, and reservable resources This includes information indicating the set of sensing intervals, information indicating whether the DM RS of PSCCH or PSSCH is used for L1 RSRP measurement in sensing operations, 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] Furthermore, the information indicating the configuration of the sidelink resource pool may include information indicating the configuration of the slots. The first half of the slot (the second OFDM symbol, or the second and third OFDMs) Slot configurations in which PSCCH can be placed only in the symbol, the first half of the slot (second OFDM symbol, or second and third OFDM symbols), or the second half of the slot (ninth OFDM symbol) The information may include details indicating which of the slot configurations in which PSCCH may be placed (either as the 9th or 10th OFDM symbol) applies.

[0094] PSSCH is placed in OFDM symbols after the OFDM symbol in which PSCCH is placed. For example, PSSCH is placed in the second or subsequent OFDM symbols in a slot. For example, if PSCCH is in a slot If placed in the first half, PSSCH is placed in the second or later OFDM symbol in the slot, and if PSCCH is placed in the second half, PSSCH is placed in the ninth or later OFDM symbol in the slot. It will be placed there.

[0095] The information indicating the configuration of PSCCH includes the number of symbols in PSCCH and the number of RBs that make up PSCCH. This information includes the initial value (ID) of the DM RS scrambling of PSCCH, and information indicating the first stage SCI Includes information indicating the number of bits reserved.

[0096] The information describing the configuration of the PSSCH includes information indicating candidate β offsets used to determine the number of coded modulation symbols in the 2nd stage SCI, information indicating the time-domain pattern of the PSSCH's DM RS, and information indicating a scaling factor to limit the number of resource elements allocated to the PSSCH's 2nd stage SCI.

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

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

[0099] Information indicating the sidelink synchronization configuration is provided when terminal device 1 is synchronized with GNSS. The link's synchronization configuration is used for sending and receiving sidelink synchronization signals, or terminal device 1 is the base When synchronized with station device 3, the sidelink synchronization configuration is for sending and receiving sidelink synchronization signals. Information indicating how it will be used, the type of hysteresis when evaluating the synchronous reference terminal device 1. Information indicating the number of sidelink SSB transmissions within a single sidelink SSB section, Information indicating the section and starting position of the drink SSB, information indicating the ID of the side link synchronization signal, This includes information such as the threshold used to determine when to send the drink synchronization signal.

[0100] The information indicating the configuration of the sidelink wireless bearer indicates whether terminal device 1 is the synchronization source. This includes information such as parameters used to detect sidelink radio link failures, frequencies used for sidelinks, configuration for the method (mode 1) instructing terminal device 3 to schedule information, configuration for the method (mode 2) instructing terminal device 1 to autonomously select resources, whether CSI reporting is used, configuration of sidelink scheduling requests, priority for sidelink SSB transmission and reception, RLC mode, sidelink logical channel configuration, and sidelink RLC configuration. .

[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, and information indicating the synchronization priority.

[0102] A method (mode 1) in which the base station device 3 instructs the terminal device 1 to schedule information. The information indicating the configuration for this is the RNTI used by the base station device 3 to scramble the CRC in DCI format (e.g., DCI format 3_0) containing scheduling information for the terminal device 1. Information indicating the configuration of Sidelink MAC, information indicating the configuration of Sidelink Configured Grant This includes information indicating the following: Information indicating the configuration of the sidelink MAC includes information indicating the configuration of the sidelink BSR, and information indicating thresholds used to determine the priority of sidelink transmission and uplink transmission. Information indicating the configuration of the sidelink Configured Grant includes information indicating an ID to identify the Configured Grant for the sidelink, information indicating the frequency resources of the sidelink Configured Grant, information indicating the time resources of the sidelink Configured Grant, information indicating the HARQ process ID of the sidelink Configured Grant, information indicating the resources used for transmitting the sidelink HARQ-ACK, information indicating the interval of the sidelink Configured Grant, information indicating the resource pool to which the sidelink Configured Grant is applied, and information indicating the starting subchannel of the sidelink Configured Grant.

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

[0104] Information indicating the configuration of a sidelink logical channel includes information indicating the sidelink logical channel priority, information indicating the configuration of scheduling requests applicable to the sidelink logical channel, information indicating the bitrate, information indicating the sidelink bucket size interval, information indicating whether HARQ feedback is applied to the sidelink logical channel, and sub-keys applied to the resource to which the sidelink logical channel is mapped. This includes information indicating the carrier interval, information indicating the maximum physical channel interval of the resource to which the sidelink logical channel is mapped, and information indicating the ID of the sidelink logical channel group.

[0105] Information indicating the configuration of the sidelink measurement includes information indicating the frequency at which the sidelink measurement is performed, information indicating the filter coefficients applied to the sidelink measurement, information indicating the interval for reporting the sidelink measurement results, information indicating the threshold used to determine whether to report the sidelink measurement results, and information indicating the interval used to determine whether to report the sidelink measurement results.

[0106] Terminal device 1 transmits information regarding the side link to base station device 3 via RRC signaling. To know. Information indicating the frequency that terminal device 1 is interested in receiving sidelink communication. Information indicating the frequency that terminal device 1 is interested in transmitting sidelink communication, sidelink Information indicating parameters requesting the link's transmission resources, information regarding sidelink capability, information indicating the cast type requesting sidelink resources (broadcast, groupcast, unicast), information indicating destination identity, and information regarding sidelink QoS. This includes information such as the RLC mode, a list of synchronization references used in terminal device 1, and so on.

[0107] The media access control layer processing unit (MAC layer processing unit) 35 activates the secondary cell. The Media Access Control Layer Processing Unit (MAC Layer Processing Unit) 35 generates MAC CEs (SCell Activation / Deactivation MAC CEs) that instruct activation / deactivation of secondary cells to multiple serving cells configured by the Wireless Resource Control Layer Processing Unit 36. The Media Access Control Layer Processing Unit (MAC Layer Processing Unit) 35 deactivates secondary cells based on a timer. The media access control layer processing unit (MAC layer processing unit) 35 performs the following: The system determines, by measuring with a timer if juring has not been performed for a certain period of time, deactivates the serving cell, and controls the wireless transceiver 30.

[0108] The functions of the wireless transceiver 30 are the same as those of the wireless transceiver 10, so their explanation 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 generation of baseband signals for physical channels, generation of baseband signals for physical signals, and detection of information transmitted by physical channels and detection of information transmitted by physical signals. The physical layer processing may also include mapping of transport channels to physical channels. Here, the baseband signal is also referred to as a time-continuous signal.

[0109] The wireless transceiver 30 may perform demodulation and / or decoding. The wireless transceiver 30 may deliver the transport block from the information detected based on the demodulation and decoding of the received physical signal to the upper layer on the UL-SCH. For example, the wireless transceiver 30 may generate the baseband signal of the downlink physical channel. Here, the transport block delivered from the upper layer on the DL-SCH may be placed on the downlink physical channel. For example, the wireless transceiver 30 may generate the baseband signal of the downlink physical signal.

[0110] The wireless transceiver 30 may perform some or all of the modulation, coding, and transmission processes. The wireless transceiver 30 may generate a physical signal based on some or all of the coding, modulation, and baseband signal generation processes for the transport block. The wireless transceiver 30 may place the physical signal in a BWP. The wireless transceiver 30 generates A physical signal may be transmitted. For example, the wireless transceiver 30 may attempt to detect information transmitted via the uplink physical channel. Here, the transport block of the information transmitted via the uplink physical channel may be delivered to the upper layer on the UL-SCH. For example, the wireless transceiver 30 may attempt to detect information transmitted by the uplink physical signal.

[0111] The wireless transceiver 30 grasps the SS (Search space) configured in the terminal device 1. The wireless transceiver 30 grasps the search area within the control resource set configured in the terminal device 1. The wireless transceiver 30 grasps the PDCCH candidates monitored by the terminal device 1 and grasps the search area. The wireless transceiver 30 grasps which control channel element each PDCCH candidate monitored by the terminal device 1 is composed of (the control channel in which the PDCCH candidate is composed (To determine the number of the NEL element). The wireless transceiver 30 includes an SS finding unit, which finds the SS configured in the terminal device 1. The SS finding unit is configured as the search space of the terminal device. The SS grasping unit identifies one or more PDCCH candidates within the control resource set. PDCCH candidates configured in the search area of ​​the control resource set (number of PDCCH candidates, number of PDCCH candidates) Understand the (number).

[0112] The SS understanding unit understands the configuration of the search area within the control resource set (number of PDCCH candidates, OFDM symbols of the PDCCH candidates, and aggregation level of the PDCCH candidates). The transmission unit (transmission processing unit) of the wireless transceiver 30 transmits a PDCCH to the terminal device 1 using the PDCCH candidates within the search area of ​​the control resource set.

[0113] The transmitting unit (also called the transmitting processing unit) of base station device 3 transmits PDCCH. Base station device 3 The transmission processing unit uses the PDCCH candidate being monitored in terminal device 1 to transmit the PDCCH The transmission processing unit of base station device 3 transmits a PDCCH to terminal device 1 using a resource corresponding to a PDCCH candidate within the search area set. Among the multiple search areas set for device 1, monitoring of PDCCH in terminal device 1 The PDCCH is transmitted using the PDCCH candidate in the search region where the search is performed.

[0114] The receiving unit (also called the receiving processing unit) of base station equipment 3 receives HARQ-ACK. The receiving processing unit of base station device 3 receives a HARQ-ACK for PDSCH. The receiving processing unit of base station device 3 The HARQ-ACK is received in the uplink frequency band (cell, component carrier, carrier). The receiving processing unit of base station device 3 receives the HARQ-ACK for the PDSCH in the downlink frequency band (cell, component carrier, carrier) managed by base station device 3.

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

[0116] The wireless transceiver 30 stops various receiving and transmitting processes in an inactive serving cell. For example, the wireless transceiver 30 stops transmitting PDCCH in an inactive serving cell. In this case, the PDSCH transmission is stopped. For example, the wireless transceiver 30 is deactivated. The Bing cell stops receiving SRS signals. For example, the wireless transceiver 30 is deactivated. Stop receiving PUSCH signals in the serving cell.

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

[0118] The baseband section 33 may digitize the baseband signal input from the RF section 32. The baseband section 33 then converts the digitized baseband signal into a Cyclic Prefix (CP) The portion corresponding to ) may be removed. The baseband section 33 is the baseband from which CP has been removed. Alternatively, a Fast Fourier Transform (FFT) can be applied to the signal to extract the signal in the frequency domain.

[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 with the CP added into an analog. The baseband unit 33 may output the analogized baseband signal to the RF unit 32.

[0120] The RF unit 32 may remove extraneous frequency components from the baseband signal input from the baseband unit 33. The RF unit 32 may upconvert the baseband signal to the 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 to control the transmission power.

[0121] Each of the parts of terminal device 1 designated by reference numerals 10 to 16 is configured as a circuit. It is also possible that each of the parts designated by reference numerals 30 to 36 in the base station device 3 is a circuit. It may be configured as follows.

[0122] The following describes various aspects of the physical channels and physical signals (physical signals) according to this embodiment.

[0123] Physical signals are a collective term for downlink physical channels, downlink physical signals, uplink physical channels, and uplink physical channels. Physical channels are a collective term for downlink physical channels and uplink physical channels. Physical signals are a collective term for downlink physical signals and uplink physical signals.

[0124] An uplink physical channel may correspond to a set of resource elements that carry information generated in the upper layer. An uplink physical channel is a physical channel used in the uplink component carrier. An uplink physical channel may be transmitted by the wireless transceiver 10. An uplink physical channel may be received by the wireless transceiver 30. In a wireless communication system according to one aspect of this 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] PUCCH transmits Uplink Control Information (UCI). It may be used for the purpose of (doing). Uplink control information may be placed in PUCCH. The line transmission / reception unit 10 may transmit a PUCCH containing uplink control information. Wireless transmission / reception Unit 30 may receive a PUCCH containing uplink control information.

[0126] Uplink control information (uplink control information bits, uplink control information sequence, uplink control information type) is channel state information (CSI), schedule Scheduling Request (SR), HARQ-ACK (Hybrid Automatic Repeat) This includes some or all of the request ACKnowledgement information. Note that the uplink control information may also include information not listed above.

[0127] Channel status information is also called channel status information bits or channel status information sequence. Scheduling requests are also called scheduling request bits or scheduling request sequence. HARQ-ACK information is also called HARQ-ACK information bits. It is also referred to as the HARQ-ACK information series.

[0128] HARQ-ACK information may consist of HARQ-ACK bits corresponding to a single transport block (TB). The HARQ-ACK bits correspond to the transport block. The corresponding ACK (acknowledgement) or NACK (negative-acknowledgement) may be indicated. An ACK may indicate that the decoded transport block has been successfully completed. A NACK indicates that the decoded transport block has not been successfully completed. It may also indicate that it has not been decoded. The HARQ-ACK information may include one or more HARQ-ACK bits.

[0129] HARQ-ACK for transport blocks is also referred to as HARQ-ACK for PDSCH. Here, “HARQ-ACK for PDSCH” may refer to HARQ-ACK for the transport blocks included in the PDSCH.

[0130] A scheduling request may be used to request UL-SCH resources for initial transmission. The scheduling request bit is positive SR or This may be used to indicate any negative SR (scheduling). When the request bit indicates a positive SR, it is also referred to as "a positive SR is transmitted." A positive SR means that terminal device 1 has requested UL-SCH resources for initial transmission. It may also indicate that a negative SR is transmitted. When the scheduling request bit indicates a negative SR, it is also referred to as "a negative SR is transmitted." A negative SR is initially transmitted by terminal device 1. You may also indicate that UL-SCH resources are not required for transmission.

[0131] Channel status information includes the Channel Quality Indicator (CQI), and Pleco CQI may include some or all of the Precoder Matrix Indicator (PMI) and Rank Indicator (RI). CQI is a quality of the propagation path (e.g., propagation intensity). Alternatively, PMI is an indicator related to the quality of the physical channel, while PMI is an indicator related to the precoder. RI is an indicator related to the transmit rank (or transmit layer count).

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

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

[0134] PUSCH provides uplink control information and one or both of the transport blocks. It may be transmitted for transmission. PUSCH transmits uplink control information, and transport It may be used to transmit one or both of the transformer blocks. It may be used to send at least some or all of the port block, HARQ-ACK, channel status information, and scheduling requests. PUSCH is a random action It is used at least to send message 3. PUSCH may be used to send information not described above. Terminal device 1 transmits uplink control information, and A PUSCH containing one or both of the transport blocks may be transmitted from the base station. Device 3 is configured to receive the uplink control information and one or both of the transport blocks. The placed PUSCH may be received.

[0135] PRACH is an index for random access preambles (random access messages). It may be transmitted to convey (1). Terminal device 1 may transmit PRACH. Base Station device 3 may receive PRACH. Terminal device 1 may transmit a random access preamble over PRACH. Base station device 3 may receive a random access preamble over PRACH.

[0136] Uplink physical signals may correspond to a set of resource elements. Uplink physical signals do not have to be used to transmit information generated in the upper layer. However, uplink physical signals may be used to transmit information generated in the physical layer. Uplink physical signals may also be physical signals used in the uplink component carrier. Wireless transceiver 10 may transmit uplink physical signals. Wireless transceiver 30 may receive uplink physical signals. In the uplink of a wireless communication system according to one aspect of this 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] The set of antenna ports for a PUSCH (DMRS associated with a PUSCH, DMRS included in a PUSCH, DMRS corresponding to a PUSCH) is given based on the set of antenna ports for the PUSCH. It may be obtained. For example, for PUSCH The set of antenna ports for the DMRS is the same as the set of antenna ports for the PUSCH. That's good too.

[0139] The propagation path of a pusher may be estimated from the DMRS for that pusher.

[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 PUCCH may be estimated from the DMRS for the PUCCH.

[0142] A downlink physical channel may correspond to a set of resource elements that transmit information generated in the upper layer. A downlink physical channel may also be a physical channel used in a downlink component carrier. The wireless transceiver 30 may transmit a downlink physical channel. The wireless transceiver 10 may receive a downlink physical channel. In the downlink of a wireless communication system according to one aspect of this 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] PBCH is transmitted to transmit either or both a Master Information Block (MIB) and / or physical layer control information. Here, physical layer control information is information generated at the physical layer. MIB is an RRC message delivered from a higher layer over the BCCH (Broadcast Control Channel).

[0144] PDCCH transmits Downlink Control Information (DCI). It is used for at least this purpose. Downlink control information may be placed in the PDCCH. End The terminal device 1 may receive the PDCCH containing downlink control information. The base station device 3, A PDCCH containing downlink control information may be transmitted.

[0145] Downlink control information may be transmitted in DCI format. The DCI format may be interpreted as the format of the downlink control information. Furthermore, the DCI format is... This may be interpreted as a set of downlink control information set in a certain downlink control information format.

[0146] Base station device 3 may notify terminal device 1 of downlink control information using PDCCH with DCI format. Here, terminal device 1 may monitor PDCCH in order to obtain downlink control information. Unless otherwise specified, DCI format and downlink control information The information may be described as equivalent. For example, base station device 3 may transmit downlink control information in DCI format to terminal device 1. Terminal device 1 may then control the wireless transceiver 10 using the downlink control information contained in the detected DCI format. That's good too.

[0147] Downlink control information may include at least one of either a downlink grant (DL grant) or an uplink grant (UL grant). The DCI format used for PDSCH scheduling is the downlink DCI format. It is also called a set. The DCI format used for scheduling PUSCH is also called the uplink DCI format. Downlink grants are downlink assignments. It is also called a 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 Matt 1_1, etc., are DCI formats. Uplink DCI formats are a general term for DCI formats 0_0 and DCI formats 0_1, etc. Downlink DCI formats are a general term for DCI formats 1_0 and DCI formats 1_1, etc.

[0149] DCI format 0_0 is used for scheduling PUSCH units to be placed in a cell. DCI format 0_0 consists of at least some or all of 1A through 1E. 1A) DCI format specific field (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] A DCI format specific field is a DCI format that includes the DCI format specific field. -The mat may indicate whether it is an uplink DCI format or a downlink DCI format. In other words, the DCI format-specific field may be included for both the uplink DCI format and the downlink DCI format. Here, DCI format 0_0 The DCI format specific field included may indicate 0.

[0151] The frequency domain resource allocation field included in DCI format 0_0 is the DCI format - May be used to indicate the allocation of frequency resources for PUSCH, which is scheduled by mat0_0.

[0152] The time domain resource allocation field included in DCI format 0_0 is the DCI format This may be used to indicate the allocation of time resources for PUSCH, which is scheduled by mat0_0.

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

[0154] The MCS field included in DCI format 0_0 is determined by DCI format 0_0. A modulation scheme for the PUSCH being routed, and the DCI format 0_1 ​​is used for scheduling It may be used to indicate one or both of the target coding rates to be applied. The target coding rate is the target for the transport block placed in PUSCH. The coding rate may also be a factor. The size of the transport blocks (TBS) placed in the PUSCH is part of the target coding rate and the modulation scheme for the PUSCH. Alternatively, the decision may be based on all of the above.

[0155] DCI format 0_0 does not need to include fields used in CSI requests. DCI format 0_0 does not need to include carrier indicator fields. DCI format 0_0 does not need to include BWP fields.

[0156] DCI format 0_1 ​​is used for scheduling PUSCH units to be placed in a cell. DCI format 0_1 ​​consists of some or all of the fields 2A through 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 DCI format 0_1 ​​is the DCI format -This may be used to indicate the allocation of frequency resources for PUSCH, which is scheduled by mat0_1.

[0159] The time domain resource allocation field included in DCI format 0_1 ​​is the DCI format This may be used to show the allocation of time resources for PUSCH, which is scheduled by mat0_1.

[0160] The MCS field included in DCI format 0_1 ​​is used in the schedule of DCI format 0_1. A modulation scheme for the PUSCH being routed, and the DCI format 0_1 ​​is used for scheduling Used to indicate one or both of the target coding rates for PUSCH being routed. It's okay if it's done that way.

[0161] The CSI request field may be used to instruct the reporting of a CSI.

[0162] The BWP field of DCI format 0_1 ​​is scheduled according to DCI format 0_1. It may be used to indicate the uplink BWP where the PUSCH being placed is located. In other words, DCI Format 0_1 ​​may or may not involve a change in the active uplink BWP. Terminal device 1 may recognize the uplink BWP on which the PUSCH is located based on detecting the DCI format 0_1 ​​used for scheduling the PUSCH.

[0163] If DCI format 0_1 ​​includes a carrier indicator field, the carrier indicator field is the uplink component carrier on which PUSCH is located. It may be used to indicate a serving cell. Terminal device 1 is under a serving cell Based on the detection of DCI format 0_1 ​​in the link component carrier, PUSCH scheduled by DCI format 0_1 ​​is included in DCI format 0_1 It may be recognized that the serving cell is located on the uplink component carrier, as indicated by the carrier indicator field.

[0164] If the DCI format 0_1 ​​does not include the carrier indicator field, the DCI format - The serving cell to which the uplink component carrier to which the PUSCH scheduled by mat 0_1 ​​is located is to which the PDCCH containing DCI format 0_1 ​​is located It may be the same as the serving cell of the downlink component carrier. Terminal device 1 In a certain serving cell, a DCI format is used in a certain downlink component carrier. Based on the detection of 0_1, it may be recognized that a PUSCH scheduled by the DCI format 0_1 ​​is placed on the uplink component carrier of a certain serving cell.

[0165] The UL DAI field is used to indicate the transmission status of the PDSCH. If 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 by the PUSCH. The UL DAI field contains information about the HARQ-ACK codebook transmitted by the PUSCH. This indicates the number of HARQ-ACKs included. The UL DAI field indicates the number of PDSCHs that contain the corresponding HARQ-ACKs in the HARQ-ACK codebook sent via PUSCH. The UL DAI field indicates the number of PDSCHs and SPS releases that contain the corresponding HARQ-ACKs in the HARQ-ACK codebook sent via PUSCH.

[0166] The UL DAI field may indicate the value after applying modulo arithmetic. An example where the UL DAI field is 2 bits is described below. If the number of PDSCHs containing the corresponding HARQ-ACK in the HARQ-ACK codebook sent via PUSCH is 0, then "00" is indicated as the UL DAI field. If the HARQ-ACK codebook sent via PUSCH contains one corresponding HARQ-ACK, the UL DAI field will be "01". If the HARQ-ACK codebook sent via PUSCH contains two corresponding HARQ-ACKs, the UL DAI field will be "10". If the HARQ-ACK codebook sent via PUSCH contains three corresponding HARQ-ACKs, the UL DAI field will be "11". If the number of PDSCHs that contain the corresponding HARQ-ACK in the HARQ-ACK codebook is 4, then "00" is indicated as the UL DAI field. If there are 5 PDSCHs that contain the HARQ-ACK, the UL DAI field will show "01". The number of PDSCHs that contain the corresponding HARQ-ACK in the HARQ-ACK codebook sent via PUSCH. If there are 6, the UL DAI field will be set to "10". If there are 7 PDSCHs in the HARQ-ACK codebook sent by PUSCH that contain the corresponding HARQ-ACK, the UL DAI field will be set to Then "11" is shown. In this example, in the HARQ-ACK codebook sent by PUSCH, a modulo operation is performed using the number '4' on the number of PDSCHs that contain the corresponding HARQ-ACK.

[0167] Terminal device 1 interprets the UL DAI field considering the total number of PDSCHs received. For example, if terminal device 1 has received 4 PDSCHs, it receives a UL DAI field indicating "00". In this case, terminal device 1 interprets that the number of PDSCHs containing the corresponding HARQ-ACKs in the HARQ-ACK codebook transmitted via PUSCH, as indicated by the UL DAI field, is four. For example, Terminal device 1 receives three PDSCH signals and receives a UL DAI field indicating "00". In this case, terminal device 1 interprets that there are 4 PDSCHs that contain the corresponding HARQ-ACK in the HARQ-ACK codebook transmitted by PUSCH, as indicated by the UL DAI field, and one PDSCH We determine that the message was not received correctly.

[0168] DCI format 1_0 is used for scheduling PDSCHs placed in a cell. DCI format 1_0 consists of some or all of 3A through 3F. 3A) DCI Format Specific Fields 3B) Frequency Domain Resource Allocation Field 3C) Time Domain Resource Allocation Field 3D) MCS Field 3E) PDSCH to 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 DCI format 1_0 is the DCI format - Shows the allocation of frequency resources for PDSCH scheduled by MAT. It may be used for that purpose.

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

[0172] The MCS field included in DCI format 1_0 may be used to indicate either or both the modulation scheme for the PDSCH scheduled by the DCI format, and the target coding rate for the PDSCH scheduled by the DCI format. Good. The target coding rate is for the transport block placed in the PDSCH. The GET coding rate may also be used. The size of the transport block (TBS) placed in the PDSCH is determined by the target coding rate and the modulation scheme for the PDSCH. The decision may be based on one or both of the following.

[0173] The PDSCH_HARQ feedback timing instruction field is the last OFDM symbol of the PDSCH. From the slot containing the symbol to the slot containing the leading OFDM symbol of PUCCH, It may be used to indicate timing from PDSCH to HARQ feedback. The indicated field may be a field indicating timing K1. The last OFDM sequence of PDSCH If the index of the slot containing the 'nbol' is slot n, then the index of the slot containing the PUCCH or PUSCH that contains at least the HARQ-ACK corresponding to the transport block contained in the PDSCH may be n+K1. The last OFDM symbol of the PDSCH is included. If the slot index is slot n, the transport included in the PDSCH The index of the slot containing the leading OFDM symbol of PUCCH or the leading OFDM symbol of PUSCH, which contains at least one HARQ-ACK corresponding to the lock, may be n+K1.

[0174] The PDSCH_HARQ feedback timing indicator field may be referred to as the PDSCH-to-HARQ feedback timing indicator field or the HARQ indicator field.

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

[0176] DCI format 1_1 is used for scheduling the PDSCH located in a certain cell. DCI format 1_1 is composed of some or all of 4A to 4I. 4A) DCI format specific field 4B) Frequency domain resource allocation field 4C) Time domain resource allocation field 4E) MCS field 4F) PDSCH_HARQ feedback timing indicator field 4G) PUCCH resource indicator field 4H) BWP field 4I) Carrier 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 DCI format 1_1 may be used to indicate the allocation of frequency resources for the PDSCH scheduled by the DCI format 1_1.

[0179] [[ID=4l]] The time domain resource allocation field included in DCI format 1_1 is the DCI format This may be used to show the allocation of time resources for PDSCH scheduled by mat1_1.

[0180] The MCS field included in DCI format 1_1 is used in the schedule of DCI format 1_1. A modulation scheme for a PDSCH to be routed, and a schedule according to the DCI format 1_1. Used to indicate one or both of the target coding rates for the PDSCH being routed. It's okay if it's done that way.

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

[0182] The PUCCH resource instruction field may be used to indicate a PUCCH resource.

[0183] The BWP field of DCI format 1_1 is used for scheduling according to DCI format 1_1. It may be used to indicate the downlink BWP where the PDSCH being linked is located. In other words, DCI Format 1_1 may or may not involve a change in the active downlink BWP. Terminal device 1 may recognize the downlink BWP on which the PDSCH is located based on detecting the DCI format 1_1 used for scheduling the PDSCH.

[0184] DCI format 1_1, which does not include the BWP field, may be a DCI format that schedules the PDSCH without changing the active downlink BWP. Terminal device 1 is a DCI format 1_1 used for scheduling the PDSCH, and the BWP field Based on detecting DCI format 1_1 that does not include, the active downlink BWP is switched off. It is acceptable to recognize that the PDSCH is being received without performing a replacement.

[0185] If DCI format 1_1 includes a carrier indicator field, the carrier indicator field is used to indicate the serving cell of the downlink component carrier where the PDSCH scheduled by DCI format 1_1 is located. It may be done. Terminal device 1 is a downlink component carrier of a serving cell. Based on the detection of DCI format 1_1, the PDSCH scheduled by DCI format 1_1 is the carrier indicator included in DCI format 1_1. It may be recognized that it is positioned on the downlink component carrier of the serving cell indicated by the field.

[0186] If DCI format 1_1 does not include a carrier indicator field, DCI format - The downlink component carrier on which the PDSCH scheduled by mat 1_1 is located is the downlink component on which the PDCCH including DCI format 1_1 is located It may be the same as the to - carrier. The terminal device 1 may recognize that, based on detecting DCI format 1_1 in a certain downlink component carrier, a PDSCH scheduled by the DCI format 1_1 is arranged in the downlink component carrier. In a downlink component carrier, based on detecting DCI format 1_1, recognize that a PDSCH scheduled by the DCI format 1_1 is arranged in the downlink component carrier. It may be recognized.

[0187] A downlink grant is at least used for scheduling one PDSCH within one serving cell. A downlink grant is at least used for scheduling a PDSCH within the same slot as the slot in which the downlink grant is transmitted. A downlink grant may be used for scheduling a PDSCH in a slot different from the slot in which the downlink grant is transmitted. An uplink grant is at least used for scheduling one PUSCH within one serving cell. In addition, various DCI formats may further include fields different from the above - mentioned fields. 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.

[0188] A PDSCH may be transmitted to transmit a transport block. A PDSCH may be used to transmit a transport block. A transport block may be arranged in a PDSCH. The base station device 3 may transmit a PDSCH in which a transport block is arranged. The terminal device 1 may receive a PDSCH in which a transport block is arranged. In addition, various DCI formats may further include fields different from the above - mentioned fields. 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] A PDSCH may be transmitted to transmit a transport block. A PDSCH may be used to transmit a transport block. A transport block may be arranged in a PDSCH. The base station device 3 may transmit a PDSCH in which a transport block is arranged. The terminal device 1 may receive a PDSCH in which a transport block is arranged. The base station device 3 may transmit a PDSCH in which a transport block is arranged. The terminal device 1 may receive a PDSCH in which a transport block is arranged.

[0190] Downlink physical signals may correspond to a set of resource elements. Downlink physical signals do not have to be used to transmit information generated in the upper layer. However, downlink physical signals may be used to transmit information generated in the physical layer. Downlink physical signals may also be physical signals used in the downlink component carrier. Wireless transceiver 10 may receive downlink physical signals. Wireless transceiver 30 may transmit downlink physical signals. In the downlink of a wireless communication system according to one aspect of this 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 synchronizes the frequency domain and / or time domain of the downlink when terminal device 1 is used. It is used to obtain the synchronization signal, PSS (Primary Synchronization Signal), and This is a general term for Secondary Synchronization Signals (SSS).

[0192] SS blocks (SS / PBCH blocks) are a combination of PSS, SSS, and PBCH, some or all of which are less than SS blocks. It is composed of including and.

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

[0194] A PBCH whose symbol is transmitted at a certain antenna port is a DMRS for a PBCH located in the slot to which the PBCH is mapped, and the SS / PBCH block containing the PBCH. It may be estimated by the DMRS for the PBCH included in the

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

[0196] The set of antenna ports for DMRS for PDSCH (DMRS associated with PDSCH, DMRS included in PDSCH, DMRS corresponding to PDSCH) is given based on the set of antenna ports for said PDSCH. It may be obtained. For example, the set of antenna ports for 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 the signal is transmitted, and a DMRS symbol for the PDSCH. If the set of resource elements on which the symbol is transmitted belongs to the same Precoding Resource Group (PRG), the PDSCH on which the symbol of that PDSCH is transmitted at a given antenna port may be estimated by the DMRS for that PDSCH.

[0198] The antenna port for the DMRS for PDCCH (DMRS associated with PDCCH, DMRS included in PDCCH, DMRS corresponding to PDCCH) may be the same as the antenna port for 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 signal is transmitted, and a DMRS symbol for the PDCCH. If the same precoder is applied (or assumed to be applied) to a set of resource elements on which the symbol is transmitted, the PDCCH on which the symbol of that PDCCH is transmitted at a given antenna port may be estimated by the DMRS for that PDCCH.

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

[0201] The BCH in the transport layer may be mapped to the PBCH in the physical layer. Transport blocks delivered from higher layers to the BCH in the physical layer are placed in the PBCH in the physical layer. It may also be done. Furthermore, the UL-SCH in the transport layer may be mapped to the PUSCH in the physical layer. stomach.

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

[0203] BCCH (Broadcast Control Channel), CCCH (Common Control Channel), and DCCH (Dedicated Control Channel) are logical channels. For example, BCCH is used to manage MIBs. It may be used to deliver RRC messages containing RRC information, or RRC messages containing system information. Furthermore, CCCH may be used to deliver RRC messages containing RRC parameters common to multiple terminal devices 1. It may be used to transmit, for example, an RRC-unconnected terminal. It may be used for terminal device 1. Also, DCCH is dedicated to a terminal device 1. It may be used to transmit data. Here, DCCH is, for example, the RRC connected terminal It may be used for terminal device 1.

[0204] BCCH may be mapped to BCH or DL-SCH. In other words, RRC containing MIB information Messages may be delivered to BCH. Also, RRC messages containing system information other than MIBs may be delivered. The message may be delivered to DL-SCH. Also, CCCH is mapped to DL-SCH or UL-SCH. In other words, an RRC message mapped to CCCH may be delivered to DL-SCH or UL-SCH. Furthermore, DCCH may be mapped to DL-SCH or UL-SCH. In other words, an RRC message mapped to DCCH may be delivered to DL-SCH or UL-SCH.

[0205] UL-SCH may be mapped to PUSCH. DL-SCH may be mapped to PDSCH. BCH It may be mapped to PBCH.

[0206] The media access control layer processing unit 15 may perform a random access procedure.

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

[0208] One physical channel may be mapped to one serving cell. The BWP may be mapped to a single BWP set on a single carrier contained within a single serving cell.

[0209] Terminal device 1 may have one or more control resource sets (CORESET) configured. Terminal device 1 monitors PDCCH in one or more control resource sets. Monitor. Here, the PDCCH is monitored in one or more control resource sets. This involves one or more PDCCH corresponding to one or more control resource sets. This may also include monitoring. Note that PDCCH is one or more PDCCH candidates and / or This may include a set of PDCCH candidates. Also, monitoring PDCCH means PDCCH, and / Alternatively, this may include monitoring and detecting the DCI format transmitted via PDCCH.

[0210] Multiple control resource sets are configured in terminal device 1, and each control resource set has An index (control resource set index) may be assigned. One or more control channel elements (CCEs) are configured within the control resource set, and each CCE has an index. (CCE index) may be assigned.

[0211] The set of PDCCH candidates monitored by terminal device 1 is the search area. It is defined from the perspective of the search space. In other words, the set of PDCCH candidates monitored by terminal device 1 is given by the search space.

[0212] The search region may consist of one or more PDCCH candidates at one or more aggregation levels. The aggregation level of the PDCCH candidate is determined by the number of CCEs that constitute the PDCCH. This may be shown. PDDCH candidates may be mapped to one or more CCEs.

[0213] The search region set may consist of at least one or more search regions. Each search area may be assigned an index (search area index).

[0214] Each of the search region sets may be associated with at least one control resource set. Each of the search domain sets may be contained within a single control resource set. For each set, an index of the control resource set associated with the search region set may be provided.

[0215] Terminal device 1 can detect PDCCH and / or DCI for itself by blindly detecting PDCCH candidates included in the search area within the control resource set. ru.

[0216] In various embodiments of this embodiment, unless otherwise specified, the number of resource blocks indicates the number of resource blocks in the frequency domain.

[0217] Terminal device 1 transmits uplink control information (UCI) to base station device 3. Terminal device 1 may also transmit the UCI multiplexed onto PUCCH. Terminal device 1 may also transmit the UCI multiplexed onto PUSCH. The UCI includes at least one of the following: Channel State Information (CSI), a Scheduling Request (SR) indicating a request for a PUSCH resource, or a HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) for downlink data (Transport block, Medium Access Control Protocol Data Unit: MAC PDU, Downlink-Shared Channel: DL-SCH, Physical Downlink Shared Channel: PDSCH). That's fine.

[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 is acceptable to refer to it by that name.

[0219] If the data is successfully decoded, an ACK is generated for that data. If the data is not decrypted, a NACK is generated for that data. HARQ-ACK is one The transport block may include at least one HARQ-ACK bit corresponding to each transport block. The HARQ-ACK bit may indicate an ACK (ACKnowledgement) or NACK (Negative-ACKnowledgement) corresponding to one or more transport blocks. The HARQ-ACK may include a HARQ-ACK codebook containing one or more HARQ-ACK bits. It may or may not be present. One or more HARQ-ACK bits in a transport block. This may be accompanied by the HARQ-ACK bit corresponding to a PDSCH containing the one or more transport blocks.

[0220] HARQ control over a single transport block may be called a HARQ process. Each process may be assigned a single HARQ process identifier. It includes a field that indicates the process identifier (HARQ process number).

[0221] An NDI (New Data Indicator) is shown in DCI format for each HARQ process. For example, the DCI format (DL assignment) containing the scheduling information of the PDSCH includes an NDI field. The NDI field is 1 bit. Terminal device 1 stores (remembers) the NDI value for each HARQ process. Base station device 3 provides the NDI for each HARQ process to terminal device 1. Store (remember) the value. Terminal device 1 stores the detected DCI format NDI field. The NDI value stored using is updated. Base station device 3 then uses the updated NDI value, or The unupdated NDI value is set in the NDI field in DCI format and sent to terminal device 1. Terminal device 1 updates the stored NDI value for the HARQ process corresponding to the value of the detected HARQ process identifier field in DCI format using the detected NDI field in DCI format.

[0222] Terminal device 1 receives based on the value of the NDI field in 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 compares the value of the NDI field in the detected DCI format with the value of the previously received NDI for a transport block of a certain HARQ process, and determines that the received transport block is a new transmission if the value of the NDI field in the detected DCI format has been toggled. The base station device 3 determines whether a certain HARQ process When a new transport block is transmitted in the process, the NDI value stored for the HARQ process is toggled, and the toggled NDI is transmitted to the terminal device 1. When device 3 transmits a retransmission transport block in a certain HARQ process, The NDI value stored for the HARQ process is not toggled, and the untoggled NDI is sent to terminal device 1. Terminal device 1 compares the value of the detected DCI-formatted NDI field with the previously received NDI value for a transport block of a certain HARQ process, and if it is toggled If it is not (i.e., the same), the received transport block is determined to be a retransmission. Note that "toggle" here means switching to a different value.

[0223] Terminal device 1 may report HARQ-ACK information to base station device 3 using a HARQ-ACK codebook in a slot indicated by the value of the HARQ instruction field included in DCI format 1_0 or DCI format 1_1 that corresponds to PDSCH reception. .

[0224] For DCI format 1_0, the value of the HARQ instruction 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 instruction field is mapped to a set of slot numbers given by the upper layer parameter dl-DataToUL-ACK. It may be mapped to a slot. The number of slots indicated based at least on the value of the HARQ instruction field may also be called the HARQ-ACK timing, or K1. For example, slot n The HARQ-ACK, which represents the decoding status of the PDSCH (downlink data) transmitted, may also be reported (transmitted) in slot n+K1.

[0225] dl-DataToUL-ACK lists the timings for HARQ-ACKs to PDSCHs. Timing refers to the slot in which a HARQ-ACK is sent for a received PDSCH, relative to the slot in which the PDSCH was received (or the slot containing the last OFDM symbol to which the PDSCH is mapped). This is the number of slots between them. For example, dl-DataToUL-ACK is a list of 1, 2, 3, 4, 5, 6, 7, or 8 timings. If Dl-DataToUL-ACK is a list of one timing, the HARQ instruction field is 0 bits. Yes. If Dl-DataToUL-ACK is a list of two timings, the HARQ instruction field is 1 bit. This is the case. If Dl-DataToUL-ACK is a list of 3 or 4 timings, the HARQ instruction is The field is 2 bits. If Dl-DataToUL-ACK is a list of 5, 6, 7, or 8 timings, the HARQ instruction field is 3 bits. For example, dl-DataToUL-ACK consists of a list of timings with values ​​in the range of 0 to 31. For example, dl-DataToUL-ACK consists of a list of timings with values ​​in the range of 0 to 63.

[0226] The size of dl-DataToUL-ACK is defined as the number of elements that dl-DataToUL-ACK contains. The size of Dl-DataToUL-ACK is L para It may also be called . 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 If =8, the index of dl-DataToUL-ACK is one of the values ​​1, 2, 3, 4, 5, 6, 7, or 8. The index of dl-DataToUL-ACK may be given, indicated, or indicated by the value indicated by the HARQ indicator field.

[0227] Terminal device 1 sets the size of the HARQ-ACK codebook according to the size of the dl-DataToUL-ACK. It is also possible. For example, if dl-DataToUL-ACK consists of 8 elements, the HARQ-ACK codebook The size is 8. For example, if dl-DataToUL-ACK consists of 2 elements, the size of the HARQ-ACK codebook is 2. Each HARQ-ACK piece of information that makes up the HARQ-ACK codebook is dl-DataT This is HARQ-ACK information for PDSCH reception at each slot timing of the oUL-ACK. This type of HARQ-ACK codebook is a semi-static HARQ-ACK codebook. It is also called.

[0228] Terminal device 1 receives HARQ-ACK information for PDSCH reception in slot n and PUCCH in slot n+k. Reporting may be done using transmission and / or PUSCH transmission, where k is the PDSCH receiver. Slots indicated by the HARQ instruction field included in the corresponding DCI format It may also be a number. Furthermore, if the HARQ instruction field is not included in the DCI format, k may be given by the upper-layer parameter dl-DataToUL-ACK.

[0229] Terminal device 1 transmits one or more candidate HARQ-ACK information corresponding to a PUCCH of a certain slot. Determine a set of multiple opportunities for supplemental PDSCH reception. Terminal device 1 receives dl-DataToUL-ACK. Multiple slots with included slot timing K1 are multiple opportunities for candidate PDSCH reception. Determine. K1 may be a set of k. For example, dl-DataToUL-ACK is (1, 2, 3, 4, 5 In the case of 6, 7, and 8), when slot n is PUCCH, HARQ-ACK information is transmitted for the PDSCH reception of slot n-1, slot n-2, slot n-3, slot n-4, slot n-5, slot n-6, slot n-7, and slot n-8. Terminal device 1 then checks the slots corresponding to the candidate PDSCH reception. If a PDSCH is actually received in a lot, an ACK or NACK is set as the HARQ-ACK report based on the transport block contained in that PDSCH. If no PDSCH is received in the slot corresponding to the candidate PDSCH reception, a NACK is set as the HARQ-ACK information.

[0230] The HARQ-ACK codebook may be given based on at least some or all of the set of monitoring occasions for PDCCH, and the values ​​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 value of the total DAI field may be given based on the total DAI field value.

[0231] The size of the HARQ-ACK codebook is the last received DCI format counter DAI file. It may be set based on the field value. The counter DAI field is the cumulative number of PDSCH or transport blocks scheduled until the reception of the corresponding DCI format. The product is shown. The size of the HARQ-ACK codebook is the total DAI field in DCI format. It may be set based on the value of . The Total DAI field indicates the total number of PDSCHs, or transport blocks, scheduled before sending the HARQ-ACK codebook.

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

[0233] Detected in a monitoring opportunity in any of the search region sets corresponding to a certain PDCCH monitoring opportunity The DCI format triggers the transmission of HARQ-ACK information in slot n. If the information to trigger is present, terminal device 1 may determine the PDCCH monitoring opportunity as a PDCCH monitoring opportunity for slot n. Also, the search area set corresponding to a PDCCH monitoring opportunity If the DCI format detected during a monitoring opportunity does not trigger the transmission of HARQ-ACK information in slot n (i.e., does not contain the information that triggers it), terminal device 1 does not need to determine that the PDCCH monitoring opportunity is a PDCCH monitoring opportunity for slot n. In the monitoring opportunity for the search area set corresponding to the viewing opportunity, if the DCI format is not detected In addition, terminal device 1 does not determine the PDCCH monitoring opportunity as a PDCCH monitoring opportunity for slot n. That's fine.

[0234] The Counter DAI (Counter DAI) is calculated for each of the M PDCCH monitoring opportunities, for each PDCCH monitoring opportunity in a given serving cell, by the cumulative number of PDCCHs detected up to that monitoring opportunity in that serving cell (or at least a value related to the cumulative number). (i) is shown. The counter DAI may also be called C-DAI. The C-DAI corresponding to a PDSCH may be shown by a field included in the DCI format used for scheduling the PDSCH. The total DAI is calculated for M PDCCH monitoring opportunities, up to m PDCCH monitoring opportunities. The cumulative number of PDCCHs detected (or a value at least related to the cumulative number) ) may also be shown. Total DAI is called T-DAI (Total Downlink Assignment Index). It may also be used.

[0235] Physical signals are also a general term for sidelink physical channels and sidelink physical signals. Physical channels are also a general term for sidelink physical channels. Physical signals are also a general term for sidelink physical signals.

[0236] A sidelink physical channel may correspond to a set of resource elements that carry information generated in the upper layer. A sidelink physical channel is a physical channel used in a sidelink. A sidelink physical channel may be transmitted by the wireless transceiver 10. A sidelink physical channel may be received by the wireless transceiver 10. In a wireless communication system according to one aspect of this 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] PSBCH includes DFN (Direct Frame Number), TDD UL-DL configuration, slot index (slot index of the slot where the PSBCH is placed), and coverage indicator. It is transmitted to convey a data (an identifier indicating whether the transmitting terminal device 1 is located within the coverage of the base station device 3).

[0238] PSCCH transmits Sidelink Control Information (SCI). ) is used at least for this purpose. Side link control information may be placed in the PSCCH. Terminal device 1 may receive PSCCH containing sidelink control information. The system may transmit a PSCCH containing sidelink control information.

[0239] Sidelink control information is transmitted and received in Sidelink Control Information Format (SCI format). The SCI transmitted and received via PSCCH is 1 st This is called stage SCI. The SCI transmitted and received by PSSCH is 2 nd This is called stage SCI. 1 st Even if the stage SCI format includes SCI format 1-A Good. SCI format 1-A is PSSCH and 2 nd Used for scheduling stage SCI. SCI format 1-A has fields indicating priority, frequency resource allocation, time resource allocation, and resource reservation intervals. , DM RS pattern field, 2 nd A field indicating the stage SCI format (SCI format 2-A, SCI format 2-B), beta offset (2 nd This field includes a field indicating the parameters used to determine the resource amount of the stage SCI, a field indicating the number of DM RS ports, a field indicating the MCS, a field indicating the MCS table, and a field including the PSFCH overhead indication.

[0240] 2 nd Stage SCI is used for PSSCH decoding. SCI format 2-A is HARQ process number Number, NDI, RV (Redundancy version), Source ID, Destination ID, HARQ Feedback Enable / Disable Indicator, Cast Type Indicator (Unicast) Includes information on broadcasts, groupcasts, and CSI requests. SCI format 2-B includes HARQ process number, NDI, RV, Source ID, Destination ID, and HARQ feedback. Includes enable / disable indicator, Zone ID, and communication range request information.

[0241] PSSCH is Sidelink data (Sidelink Transport Block, Sidelink PDU), 2 nd Stage SCI may be transmitted to transmit. PSSCH is side link data, 2 nd It may be used to transmit stage SCI. Terminal device 1 transmits side link data, 2 nd The PSSCH on which the stage SCI is located may be transmitted. Terminal device 1 will send side link data Ta, 2 nd A PSSCH with a stage SCI installed may be received.

[0242] PSFCH may be used to transmit HARQ-ACK information corresponding to PSSCH reception. Terminal device 1 may transmit PSFCH containing HARQ-ACK information. Terminal device 1 may transmit HARQ-ACK information You may receive a PSFCH containing a report.

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

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

[0245] Sidelink DM RS is a general term for DM RS for PSBCH, DM RS for PSCCH, and DM RS for PSSCH. The time-domain pattern for DM RS for PSSCH is selected by the transmitting terminal device 1. Candidate time-domain patterns are configured for each resource pool.

[0246] The sidelink CSI-RS is a reference signal used for channel measurement of the sidelink. It consists of time resource allocation (symbol placement), frequency resource allocation, number of antenna ports, and number of layers. Terminal device 1 reports channel status information measured based on the sidelink CSI-RS using MAC CE.

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

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

[0249] Terminal device 1 may report the sidelink HARA-ACK information received from the transmitting terminal device 1 to base station device 3 using the uplink PUCCH. Semi-static HARQ-ACK codebook and Dynamic HARQ-ACK codebook may be used.

[0250] The base station device 3 may notify the terminal device 1 of the sidelink scheduling information using DCI format. DCI format 3_0 is used for scheduling PSCCH and PSSCH. DCI format 3_0 consists of some or all of the following information: • Resource pool index • Time gap • HARQ process number NDI • Subchannel assignment information · SCI format 1_A field • Timing indicator that provides feedback of PSSCH HARQ-ACK for PSFCH reception • PUCCH resource indicator • Configuration Index • Side link assignment index counter

[0251] The resource pool index indicates the resource pool used for the scheduled PSCCH and PSSCH. The time gap indicates the time from receiving DCI format 3_0 to performing sidelink transmission. The subchannel allocation information indicates the subchannel used for the scheduled PSCCH and PSSCH. The SCI format 1_A field contains information on frequency resource allocation and time resource allocation for SCI format 1_A transmitted by terminal device 1 on PSCCH. The timing indicator for feeding back the HARQ-ACK of the PSSCH corresponding to PSFCH reception indicates the timing at which terminal device 1 feeds back the HARQ-ACK information obtained from receiving the PSFCH from the other terminal device 1 using PUCCH. The PUCCH resource indicator indicates the PUCCH resource used for feeding back the HARQ-ACK information obtained from receiving the PSFCH. The figuring index indicates the configuration of the sidelink configured grant. The sidelink allocation index counter indicates the number of sidelink allocations that base station device 3 has allocated to terminal device 1 within a given interval.

[0252] To utilize unlicensed spectrum, certain restrictions must be met. For example, according to regulations by the European Telecommunications Standards Institute (ETSI), for the use of 5 GHz, one of the unlicensed spectrum, the Occupied Channel Bandwidth (OCB), which includes 99% of the signal power, must be at least 80% of the available bandwidth (e.g., system bandwidth, LBT subband bandwidth, subband bandwidth). Furthermore, restrictions are stipulated regarding the maximum transmit power density (PSD) per given bandwidth (1 MHz). It is being done.

[0253] To satisfy these constraints (for example, OCB rules), an unlicensed carrier, Transmission is performed using a set of multiple frequency domain resources at fixed intervals (also called interlaces, RB sets, etc.) (interlaced transmission). One interlace is at a predetermined frequency interval ( For example, it may be defined as a set of multiple frequency domain resources allocated at intervals of 10 RB.

[0254] Figure 5 shows an example of interlaced mapping according to one aspect of this embodiment. Here, we will describe the case where the total available bandwidth is 20 MHz and there are 100 RBs. Interlace #i consists of 10 RBs with index values ​​{i, i+10, i+20, ..., i+90}. One interlace consists of multiple RBs with frequency intervals of 10 RBs. If the total bandwidth is 20 MHz, then 10 interlaces #0-#9 are provided.

[0255] Figure 5 illustrates the case where the subcarrier spacing is 15 kHz, but when the subcarrier spacing is 30 kHz, the frequency spacing of the resource blocks constituting the interlace may be different. A 20 MHz bandwidth consists of 50 RBs, and one interlace consists of 10 RBs. In this case, the interlaces provided will be 5 in number, #0-#4. In this case, interlace #i is, It consists of 10 RBs with index values ​​{i, i+5, i+10, ..., i+45}. One interlace consists of multiple RBs with frequency intervals of 5 RBs.

[0256] A subchannel may consist of one or more interlaces. Subchannel indices and interlace indices may be associated in ascending order.

[0257] Figure 6 shows the arrangement of the PSCCH monitored in terminal device 1 according to one aspect of this embodiment. This figure shows that 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 the case where PSCCH is monitored with the second OFDM symbol (#1). PSCCH is monitored with a specific subchannel of the second OFDM symbol (for example, the subchannel with the smallest subchannel index). The terminal device 1, upon detecting PSCCH, then checks the other subchannels of the second OFDM symbol. PSSCH is received at the first OFDM symbol, and PSSCH and DM RS are received at the third and subsequent OFDM symbols. Figure 6(b) shows the case where PSCCH is monitored at the second and third OFDM symbols (#1, #2). The second and third OFDM symbols have specific subchannels (for example, the first subchannel index). PSCCH is monitored in a small subchannel. Terminal device 1 can detect PSCCH. Then, PSSCH is received on the other subchannels of the second and third OFDM symbols. PSSCH and DM RS are received on the fourth and subsequent OFDM symbols. Note that in Figure 6(b), it is intended that one PSCCH is monitored for the second and third OFDM symbols, not two PSCCHs.

[0258] Figure 7 shows the arrangement of the PSCCH monitored in terminal device 1 according to one aspect of this embodiment. This is a diagram illustrating an example. One slot contains 14 OFDM symbols (#0, #1, #2, #3, #4, #5 It consists of #6, #7, #8, #9, #10, #11, #12, and #13). Figure 7(a) shows the case where PSCCH is monitored with a maximum of the second OFDM symbol (#1) and the ninth OFDM symbol (#8). The second OFDM symbol has a specific subchannel (for example, the subchannel index of PSCCH is monitored in the smallest subchannel. Terminal device 1 is the second OFDM syn When PSCCH is detected in the volt, PSCCH is received in other subchannels of the second OFDM symbol. The third and subsequent OFDM symbols receive PSSCH and DM RS, and the ninth OFDM symbol receives PSCCH. No monitoring is performed. If terminal device 1 does not detect PSCCH in the second OFDM symbol, it will monitor PSCCH in a specific subchannel of the ninth OFDM symbol. Terminal device 1 is 9 If PSCCH is detected in the OFDM symbol of the eye, PSSCH is received in the other subchannels of the 9th OFDM symbol, and PSSCH and DM RS are received in the 10th and subsequent OFDM symbols.

[0259] Figure 7(b) shows the second and third OFDM symbols (#1, #2) and the ninth and tenth OFDM symbols. This shows when PSCCH is monitored with the Symbols (#8, #9). The second and third OFDM symbols PSCCH is monitored on a specific subchannel of the log (for example, the subchannel with the smallest subchannel index). Terminal device 1 detects PSCCH with the second and third OFDM symbols. If it can be output, the second and third OFDM symbols receive PSSCH on other subchannels, and the fourth and subsequent Terminal device 1 receives PSSCH and DM RS on the following OFDM symbols, and does not monitor PSCCH on the 9th and 10th OFDM symbols. If terminal device 1 cannot detect PSCCH on the 2nd and 3rd OFDM symbols, it monitors PSCCH on specific subchannels of the 9th and 10th OFDM symbols. If terminal device 1 can detect PSCCH on the 9th and 10th OFDM symbols, it receives PSSCH on other subchannels of the 9th and 10th OFDM symbols, and PSSCH and DM RS on the 11th and subsequent OFDM symbols. The following is received. Note that in Figure 7(b), the second and third OFDM symbols are intended to monitor one PSCCH, not two PSCCHs. Note that in Figure 7(b), the ninth and tenth OFDM symbols are intended to monitor one PSCCH. The intention is to perform monitoring, not to monitor two PSCCHs.

[0260] Terminal device 1, before transmitting a signal (channel access), accesses other equipment (e.g., base station equipment). Channel sensing (carrier sense) is performed to check whether a terminal device, WiFi terminal device, WiFi access point, etc. is transmitting. Terminal device 1 performs channel sensing (carrier sense) after the previous signal transmission. The backoff counter value is randomly selected within the range of the contention window size (CWS). It generates the following. Terminal device 1 has a channel (LBT subband, RB set. For example, a bandwidth of 20 MHz). Wait until it is confirmed that the bandwidth is idle, and perform carrier sensing at each sensing slot time. Terminal device 1, if the channel is idle, performs contention win Within the Dough Size (CWS), a randomly determined counter value is sequentially decreased, and after the counter value reaches 0, access to the channel is obtained and a signal is transmitted. Terminal device 1, which uses HARQ-ACK feedback for communication, updates the contention window size after the signal transmission is complete based on the HARQ-ACK feedback received from the signal recipient terminal device 1. If the status of the HARQ-ACK is ACK, terminal device 1 sets the contention window size to the minimum value. If the status of the HARQ-ACK is NACK, terminal device 1 sets the contention window size to the minimum value. Set the window size to the next largest value. Terminal device 1 controls the contention window. If the size reaches the maximum configurable value, the system will continue to use the maximum value even if the HARQ-ACK status is NACK.

[0261] Terminal device 1 acquires a transmission opportunity (TxOP, Channel Occupancy) and transmits when the LBT result is idle, and does not transmit when the LBT result is busy (LBT-busy). The duration of the transmission opportunity is called Channel Occupancy Time (COT). COT is the total time length of all transmissions within the transmission opportunity and the gap within a predetermined time, and may be less than or equal to the Maximum COT (MCOT). MCOT is determined based on the channel access priority class. The channel access priority class may also be associated with the contention window size.

[0262] A channel access priority class is defined and used. For example, four channels Channel Access Priority Class (Channel Access Priority Class 1, Channel Channel access priority classes 2, 3, and 4 are defined and used. In Class 1, the minimum contention window size is 3 slots, the maximum contention window size is 7 slots, and the allowed contention window is... There are two sizes: {3 slots, 7 slots}. In Channel Access Priority Class 2, the minimum contention window size is 7 slots, the maximum contention window size is 15 slots, and the allowed contention window size is {7 There are two slots, {15 slots}. In channel access priority class 3, the most The small 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} (7 types). In channel access priority class 4, the minimum contention window is... The 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}, which is 7 in total. Note that the contention window size may also represent the number of slots counted.

[0263] Terminal device 1 determines that the channel is busy based on carrier sensing during the sensing slot time. Then, the system senses whether the channel is idle in the defer interval. The defer interval consists of 16us and multiple sensing slots. The number of sensing slots that make up the defer interval is... 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 quality class 2, approximately two sensing slots are configured in the defer interval. In Access Priority Class 3, approximately three sensing slots are configured in the defer interval. In channel access priority class 4, there are approximately 7 deferred sensing slots. The system is configured as follows. If terminal device 1 determines that the channel is busy in the defer section, it will then determine if the channel is idle in a new defer section. If it is determined to be a dollar, the counter value set based on the contention window size is decremented, and carrier sensing continues at each sensing slot time to determine if the channel is idle.

[0264] For example, a maximum COT of 2ms is used for channel access priority class 1. For example, a maximum COT of 4ms is used for channel access priority class 2. For example, a maximum COT of 6ms is used for channel access priority class 3. For example, a maximum COT of 10ms is used for channel access priority class 3. For example, a maximum COT of 6ms is used for channel access priority class 4. It is used. For example, a maximum COT of 10ms is used for channel access priority class 4.

[0265] Sidelink transmission resource selection mode 2 is when terminal device 1 autonomously performs PSCCH / PSSCH transmission. This is a method for determining which resources to use. The upper layer of terminal device 1 requests the physical layer of terminal device 1 to determine a set SA of resources, and PSCCH / PSSCH transmissions are made from that set SA of multiple resources. Determine the resources for transmission. The physical layer of terminal device 1 performs sidelink transmission resource selection. To perform Mode 2, parameters may be notified from the upper layer. The parameters to be notified may be L1 priority prioTX, remaining packet delay budget, L_subCH (number of subchannels used for PSCCH / PSSCH transmission in one slot), and Prsvp_TX (period for resource reservation). The upper layer is a layer above the physical layer of terminal device 1 and may be the MAC layer. Alternatively, the upper layer may be the RRC layer.

[0266] The set SA that the physical layer of terminal device 1 notifies the upper layer of terminal device 1 of is for PSCCH / PSSCH transmission. It may also be a set of candidate resources. Set SA is one or more resources Candidates may be included. Terminal device 1 may determine candidate resources for PSCCH / PSSCH transmission included in set SA. Terminal device 1 may determine that other terminal device 1 will perform PSCCH / PSSCH transmission. Candidate resources for terminal device 1 that overlap with reserved resources may be excluded from set SA. The resources reserved by other terminal device 1 for performing PSCCH / PSSCH transmission may be referred to as the reserved resources of other terminal device 1. Candidate resources for PSCCH / PSSCH transmission may be referred to as candidate resources.

[0267] Figure 8 shows an example of a resource selection procedure in a resource pool according to one aspect of this embodiment. Terminal device 1 may include any of terminal devices 1A to 1D in Figure 1. Other terminal device 1 may include any of terminal devices 1A to 1D in Figure 1. In Figure 8, Each horizontal square represents one slot, and each vertical square represents one subchannel. Sub-channel #0 is... A subchannel within the source pool, with an index of 0. Slot #0 is a resource pool A slot belonging to the group has an index of 0. In Figure 8, as an example, the number of subchannels L_subCH used for PSCCH / PSSCH transmission is set to 2. For example, in Figure 8, terminal device 1 may have 2 subchannels for one candidate resource in each slot within the time interval.

[0268] Terminal device 1, as the first step of the resource selection procedure, selects a resource in slot n. When triggering the selection procedure, the time interval may be from slot n+T1 to slot n+T2. For example, in Figure 8, slot 801 is when terminal device 1 triggers the resource selection procedure. It may also be a slot that triggers. In Figure 8, period 802 may be the period of the time interval. The time interval is a candidate resource for PSCCH / PSSCH transmission. This may be a period for determining the resource plan within the time interval. Terminal device 1 will determine the resource plan within the time interval. In a slot, a candidate resource is defined as a set of consecutive subchannels equal to the number of L_subCHs. In other words, a candidate resource may be defined as a set of consecutive subchannels equal to the number of L_subCHs. For example, in Figure 8, candidate resource 803 may be one of the candidate resources that use sub-channel #0 and sub-channel #1 in slot #8. Candidate resource 804 may be one of the candidate resources that use sub-channel #1 and sub-channel #2 in slot #8. This is also acceptable. Candidate resource 805 may be one of the candidate resources that use sub-channel #0 and sub-channel #1 in slot #11. Candidate resource 806 may be one of the candidate resources that use sub-channel #1 and sub-channel #2 in slot #11. Similarly, terminal device 1 It may be determined that there are candidate resources that use sub-channel#0 and sub-channel#1 in slot#9. Terminal device 1 may determine that there are candidate resources that use sub-channel#1 and sub-channel#2 in slot#9. Terminal device 1 may determine that there are supplementary resources. Terminal device 1 may determine that there are candidate resources using sub-channel #0 and sub-channel #1 in slot #10. Terminal device 1 may determine that there are candidate resources using sub-channel #1 and sub-channel #2 in slot #10. Terminal device 1 may determine that there are a total of 8 candidate resources within the time interval. Terminal device 1 may determine T1 in the range of 0 or more and Tproc1 or less. Tproc1 is the number of slots and is defined for each subcarrier interval of the sidelink BWP. Terminal device 1 may determine T2 based on T2min and the remaining packet delay budget. For example, if T2min is shorter than the remaining packet delay budget time, terminal device 1 may determine T2 in the range of T2min or more and remaining packet delay budget or less. If T2min is not shorter than the remaining packet delay budget time, terminal device 1 sets T2 to the remaining packet delay budget time. It is also acceptable. T2min is the PSSCH transmission plan from the RRC parameter sl-SelectionWindowList. A value corresponding to the priority L1 priority prioTX may be determined. sl-SelectionWindowList is a list of parameters for determining the end of the time interval, with L1 priority and window size set. sl-SelectionWindowList may be included in the resource pool configuration information. L1 priority prioTX may be the priority of PSCCH / PSSCH transmission by terminal device 1. Terminal device 1 may use M_total as the total number of candidate resources within the time interval. For example, in Figure 8, M_total is 8 because there are 2 candidate resources in one slot and the time interval period is 4 slots. For example, when L_subCH is 1, terminal device 1 considers 1 subchannel as 1 candidate resource in each slot within the time interval. In Figure 8, when L_subCH is 1, terminal device 1 considers each slot It is determined that there are three candidate resources in the slot. Terminal device 1 has three candidate resources in one slot, and the time interval period is 4 slots, so M_total is 12. In other words, the first step of the resource selection procedure is to decide on the candidate resources within the time interval. This is a step to determine the outcome.

[0269] Terminal device 1 may define the range from slot n-T0 to slot n-Tproc0 as a sensing window as the second step of the resource selection procedure. For example, in Figure 8, The interval 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 interval of the sidelink BWP. It is defined as follows. sl-SensingWindow is a parameter for determining the start of the sensing window and may be included in the resource pool configuration information. Terminal device 1 is the sensing window Sidelink resource pool, excluding the slot from which terminal device 1 itself transmitted within the ND. Monitor the slots belonging to . In other words, the second step of the resource selection procedure is to monitor the sensit This is the step for defining the window.

[0270] Terminal device 1 may determine the RSRP threshold as the third step of the resource selection procedure. Terminal device 1 determines the RSRP threshold in the sixth step in order to exclude candidate resources based on the RSRP threshold. Terminal device 1 may determine the RSRP threshold from the priority L1 priority prioTX of Terminal device 1's PSSCH transmission, the priority L1 priority prioRX of other Terminal device 1's PSSCH transmission notified by SCI, and the RRC parameter sl-Thres-RSRP-List. Device 1 determines the RSRP threshold for each PSSCH transmission priority L1 priority prioTX of terminal device 1 and the PSSCH transmission priority L1 priority prioRX of other terminal device 1 notified via SCI. It is also possible that the sl-Thres-RSRP-List shows a list of 64 thresholds, and which threshold to use may be determined from the PSSCH transmission priority L1 priority prioTX of terminal device 1 and the PSSCH transmission priority L1 priority prioRX of other terminal device 1. The sl-Thres-RSRP-List may be included in the resource pool configuration information. In other words, the third step of the resource selection procedure The step is to determine the RSRP threshold.

[0271] Terminal device 1 may, as the fourth step of the resource selection procedure, set all candidate resources in the candidate resource set SA. The terminal device 1 may initialize set S_A to include all candidate resources determined in the first step. In other words, the fourth step of the resource selection procedure is to select a set of candidate resources. Steps to set all candidate resources determined in the first step in the SA set. That is the case.

[0272] As the fifth step of the resource selection procedure, terminal device 1 itself transmits within the sensing window, and in slots not being monitored within the sensing window, SCI Assuming that format 1-A has been received, candidate resources belonging to slots that are on all periods of the RRC parameter sl-ResourceReservePeriodList from a slot that has received SCI format 1-A may be excluded from the set SA. sl-ResourceReservePeriodList indicates the set of periods of valid reserved resources in that resource pool, and up to 16 values ​​may be set for each resource pool. sl-ResourceReservePeriodList may be included in the resource pool configuration information. For example, in Figure 8, slot 808 is not being monitored by terminal device 1. It may be any slot. Terminal device 1 assumes that it has received SCI format 1-A in slot 808, and that all slots on the sl-ResourceReservePeriodList are located from slot 808. Candidate resources belonging to this category are excluded from set SA. In Figure 8, sl-ResourceReservePeriodList is assumed to show 8-period slots and 9-period slots. Slot 809 is a slot in the 8-period slot from slot 808. Terminal device 1 excludes candidate resources belonging to slot 809 from set SA. Slot 810 is a slot in the 9-period slot from slot 808. It is a certain slot. Terminal device 1 removes candidate resources belonging to slot 810 from set SA. In other words, the fifth step of the resource selection procedure is to monitor in the sensing window. This is a step to eliminate candidate resources from the set SA by considering slots that have not yet been performed.

[0273] Terminal device 1, after the fifth step of resource selection, if the number of candidate resources remaining in set SA is less than X·M_total, sets all candidate resources determined in the first step to set SA. You may set this. X is the total number of candidate resources determined in the first step M_total The percentage of candidate resources relative to the total may be shown. X may be set by the RRC parameter sl-TxPercentateList. sl-TxPercentateList may be included in the resource pool configuration information. Terminal device 1 will act if the number of candidate resources remaining in set SA is greater than or equal to X·M_total. Maintain candidate resources for the set SA.

[0274] As the sixth step of the resource selection procedure, terminal device 1 receives the resource reservation period field of SCI format 1-A from other terminal device 1 via the sensing window, and the time domain resource Based on the allocation field and the frequency domain resource allocation field, the location of the reserved resource of other terminal device 1 is determined. Terminal device 1 may exclude candidate resources from set SA that overlap with the reserved resource of other terminal device 1 if the RSRP measurement value of the SCI format 1-A of other terminal device 1 is higher than the set RSRP threshold. For example, in Figure 8, resource 811 is in slot #3 within the sensing window, sub-channel #1 where terminal device 1 is located at the same SCI as other terminal device 1. This is a resource that received format 1-A. Terminal device 1 may determine the location of a reserved resource of another terminal device 1 from the SCI format 1-A received by resource 811. Resource 812 is Resource 812 is the reserved resource of other terminal device 1, indicated by SCI format 1-A received at source 811. Resource 812 is the reserved resource of other terminal device 1 located in sub-channel #0 of slot #11. Terminal device 1 measures the RSRP of the SCI format 1-A of other terminal device 1 received by resource 811. If it is determined that the constant value is higher than the set RSRP threshold, candidate resource 805 that overlaps with reserved resource 812 of other terminal device 1 is excluded from set SA. Resource 813 receives SCI format 1-A from other terminal device 1 on sub-channel #2 in slot #4 within the sensing window. This is a resource. The other terminal device 1 that sent SCI format 1-A with resource 811 and the other terminal device 1 that sent SCI format 1-A with resource 813 may be different terminal devices. Terminal device 1 uses the SCI format 1-A received by resource 813 to determine the location of the reserved resource of the other terminal device 1. The location may be determined. Resource 814 is a reserved resource of other terminal device 1 indicated by the SCI format 1-A received in resource 813. Resource 814 is a reserved resource of other terminal device 1 located in sub-channel #2 of slot #11. If terminal device 1 determines that the RSRP measurement value of the SCI format 1-A of other terminal device 1 received in resource 813 is below the set RSRP threshold, then other Even if the reserved resource 814 and candidate resource 806 of terminal device 1 overlap, candidate resource 806 is not excluded from set SA. In other words, the sixth step of the resource selection procedure is sensing This step determines whether to exclude candidate resources from set SA based on the SCI format 1-A received from another terminal device 1 via the window.

[0275] As the seventh step in resource selection, terminal device 1 increases the RSRP threshold by 3 dB and restarts resource selection from the fourth step if the number of candidate resources remaining in set SA is less than X·M_total. The physical layer of terminal device 1 may notify the upper layer of terminal device 1 of set SA if the number of candidate resources remaining in set SA is greater than or equal to X·M_total. In other words, the seventh step of the resource selection procedure is the step of deciding whether or not to restart resource selection.

[0276] When terminal device 1 redoes resource selection, the RSRP threshold for eliminating candidate resources in the sixth step may be increased by 3 dB. For example, terminal device 1 may increase the RSRP threshold by 3 dB. By doing so, the number of candidate resources to be eliminated in the second sixth step will be less than the number of candidate resources to be eliminated in the first sixth step, and the number of candidate resources remaining in set SA in the second resource selection will be increased compared to the first resource selection. For example, in Figure 8, terminal device 1, as a result of the first resource selection, has candidate resources remaining in set SA. If the number is smaller than a predetermined number, the RSRP threshold is amplified by 3 dB, and resource selection is restarted from the fourth step. In Figure 8, terminal device 1 receives at resource 811 in the first sixth step. Because the RSRP measurement value of SCI format 1-A on other terminal device 1 exceeded the RSRP threshold, candidate resource 805, which overlapped with reserved resource 812 on other terminal device 1, was excluded from set SA. In the second sixth step, terminal device 1 received the RSRP of SCI format 1-A on resource 811. When the measured value does not exceed the RSRP threshold, candidate resource 805 that overlaps with reserved resource 812 of another terminal device 1 is not excluded from the set SA. In other words, terminal device 1 can increase the number of candidate resources remaining in the set SA by increasing the RSRP threshold and re-selecting resources.

[0277] The upper layer of terminal device 1 transmits PSCCH / PSSCH signals from the set SA notified from the physical layer of terminal device 1. The terminal device 1 may select (determine) a resource for transmission and notify the physical layer of terminal device 1. The upper layer of terminal device 1 may generate an SL grant to indicate the selected resource and pass the generated SL grant to the physical layer of terminal device 1. Based on the SL grant, the physical layer of terminal device 1 determines the resource for PSCCH / PSSCH transmission (i.e., the resource selected by the upper layer of terminal device 1). Terminal device 1 may perform PSCCH / PSSCH transmission using the resource selected (determined) by the upper layer. Among the resources selected (determined) by the upper layer for a given resource selection procedure, the PSCCH / PSSCH transmission using the first resource may be called the initial transmission. PSCCH / PSSCH transmissions using resources other than the first resource may not be called initial transmissions. In other words, among the resources selected (determined) by the upper layer for a given resource selection procedure, resources other than the first resource may be called reserved resources (reserved resources of terminal device 1 itself). Device 1 autonomously selects a resource for PSCCH / PSSCH transmission (mode 2), and then selects a candidate resource. The first PSCCH / PSSCH transmission in the system may be designated as the initial transmission. Terminal device 1 may set the reserved resources after the resource reservation cycle following the initial transmission. The initial transmission may be the first transmission performed using the determined resources.

[0278] Terminal device 1 may set the duration of the first OFDM symbol signal in PSCCH / PSSCH transmission to be longer by the duration of the CPE (Cyclic Prefix Extension). Send the start time of the first OFDM symbol in the source earlier by the duration of the CPE. It may also be a method for initiating. The duration of the CPE (Cyclic Prefix Extension) is the length of the CP extension (Cyclic Prefix Extension) of the first symbol in the resource used for PSCCH / PSSCH transmission. Applying the CPE duration to PSCCH / PSSCH transmission may mean that PSCCH / PSSCH transmission starts a number of CPE durations before the start of the resource used for PSCCH / PSSCH transmission. Not applying the CPE duration to PSCCH / PSSCH transmission means that the transmission starts from the beginning of the resource (the first symbol of the resource) PSCCH / PSSCH transmission may also be initiated. The physical layer of terminal device 1 is The length of the first OFDM symbol of the PSCCH / PSSCH transmission resource notified from the upper layer may be set to be longer by the duration of the CPE. Terminal device 1 is unlicensed spectrum After channel sensing is complete, the first OFDM symbol signal for PSCCH / PSSCH transmission PSCCH / PSSCH transmission can be performed with the duration set to be longer by the duration of the CPE.

[0279] When terminal device 1 determines the duration of a CPE from a set of multiple CPE durations, it does so based on (and according to) the channel access priority class of the PSCCH / PSSCH transmission. The duration may be determined. In other words, when terminal device 1 determines the duration of a CPE from a set of durations of multiple CPEs, it determines the duration of the CPE corresponding to the channel access priority class of the PSCCH / PSSCH transmission and applies the determined CPE duration to the PSCCH / PSSCH transmission. It is also possible. When terminal device 1 determines the duration of a single CPE as the duration of the CPE, The duration of a single CPE may be applied to PSCCH / PSSCH transmission.

[0280] In a first embodiment of the present invention, the terminal device 1 may determine the duration of the CPE based on whether the PSCCH / PSSCH transmission performed by the terminal device 1 is an initial transmission. For example, if the PSCCH / PSSCH transmission performed by the terminal device 1 is an initial transmission, the terminal device 1 determines the duration of multiple CPEs The duration of the CPE may be determined from the set and applied to the PSCCH / PSSCH transmission. If the PSCCH / PSSCH transmission performed by terminal device 1 is not an initial transmission, terminal device 1 may determine the duration of a single CPE as the CPE duration and apply the determined CPE duration to the PSCCH / PSSCH transmission.

[0281] Figure 9 shows an example of the process for determining the duration of the CPE of a terminal device according to one aspect of this embodiment. Terminal device 1 determines whether or not the PSCCH / PSSCH transmission is an initial transmission (S901). If terminal device 1 determines that the PSCCH / PSSCH transmission is an Initial transmission (Step S901: YES) The duration of a CPE is determined from a set of multiple CPE durations according to the channel access priority class of the PSCCH / PSSCH transmission (step S902). If terminal device 1 determines that the PSCCH / PSSCH transmission is not an Initial transmission (step S901: NO), it determines the duration of a single CPE as the duration of the CPE (step S903).

[0282] A set of durations for multiple CPEs and a single CPE duration may be configured for each resource pool. Terminal device 1 selects the PSCCH / PSSCH duration to transmit from the set of durations for multiple CPEs. The duration of CPE may be determined based on the channel access priority class. Channel access priority class 1 has the longest duration, channel access priority The second longest duration may be assigned to channel access priority class 2, the third longest duration to channel access priority class 3, and the fourth longest duration to channel access priority class 4. The duration of a single CPE is the length indicated by the parameters of a certain higher layer. It is also possible that a single CPE duration may be assigned a duration shorter than any duration included in a set of multiple CPE durations. Alternatively, a single CPE duration may be assigned the longest duration included in a set of multiple CPE durations. Furthermore, a single CPE duration may be the same as any duration included in a set of multiple CPE durations. Additionally, a single CPE duration may be selected from any duration included in a set of multiple CPE durations.

[0283] A second embodiment of the present invention may determine the CPE duration based on whether the PSCCH / PSSCH transmission performed by terminal device 1 is an initial transmission and whether a reserved resource for PSCCH / PSSCH transmission by another terminal device 1 exists in the slot for the initial PSCCH / PSSCH transmission. For example, if the PSCCH / PSSCH transmission performed by terminal device 1 is not an initial transmission, terminal device 1 may apply the duration of a single CPE to the PSCCH / PSSCH transmission. That is, terminal device 1 may determine the CPE duration based on whether the PSCCH / PSSCH transmission performed by terminal device 1 is an initial transmission and whether a reserved resource for PSCCH / PSSCH transmission by another terminal device 1 exists in the slot for the initial PSCCH / PSSCH transmission. If the PSCCH / PSSCH transmission performed by terminal device 1 is not an initial transmission, the duration of a single CPE may be applied to the PSCCH / PSSCH transmission, regardless of whether or not a reserved resource for PSCCH / PSSCH transmission from another terminal device 1 exists in the slot where the PSCCH / PSSCH transmission is performed. Terminal device 1, when the PSCCH / PSSCH transmission performed by terminal device 1 is an initial transmission, the slot where the PSCCH / PSSCH transmission is performed The duration of the CPE may be determined based on whether or not a reserved resource for PSCCH / PSSCH transmission exists for another terminal device 1. For example, if the PSCCH / PSSCH transmission performed by terminal device 1 is an initial transmission and a reserved resource for PSCCH / PSSCH transmission exists for another terminal device 1 in the slot where terminal device 1 performs the initial PSCCH / PSSCH transmission, the duration of a single CPE may be applied to the PSCCH / PSSCH transmission. If the PSCCH / PSSCH transmission performed by terminal device 1 is an initial transmission and a reserved resource for PSCCH / PSSCH transmission does not exist for another terminal device 1 in the slot where terminal device 1 performs the initial PSCCH / PSSCH transmission, the duration of the CPE may be determined from a set of CPE durations according to the channel access priority class of the PSCCH / PSSCH transmission, and the determined duration may be applied to the PSCCH / PSSCH transmission.

[0284] The physical layer of terminal device 1 receives a reserved resource in SCI format 1-A from another terminal device 1 within the sensing window, and then receives a resource notified from the upper layer that transmits PSCCH / PSSCH. It is also possible to determine whether a reserved resource of another terminal device 1 exists in the same slot.

[0285] A third embodiment of the present invention involves determining whether the PSCCH / PSSCH transmission performed by terminal device 1 is an initial transmission, whether a reserved PSCCH / PSSCH resource of another terminal device 1 exists in the slot where terminal device 1 performs the initial PSCCH / PSSCH transmission, and whether the resources for the initial PSCCH / PSSCH transmission of terminal device 1 and the reserved PSCCH / PSSCH resources of the other terminal device 1 overlap. The duration of the CPE may be determined based on the following. For example, if the PSCCH / PSSCH transmission performed by terminal device 1 is not an initial transmission, the duration of a single CPE may be applied to the PSCCH / PSSCH transmission. Terminal device 1 may, if the PSCCH / PSSCH transmission performed by terminal device 1 is an initial transmission, and there is no reserved resource for PSCCH / PSSCH transmission by another terminal device 1 in the slot where terminal device 1 performs the initial PSCCH / PSSCH transmission, determine the duration of a CPE from a set of multiple CPE durations and apply the determined duration to the PSCCH / PSSCH transmission. Terminal device 1 is a terminal The PSCCH / PSSCH transmission performed by device 1 is an initial transmission, and a reserved resource for the PSCCH / PSSCH transmission of another terminal device 1 exists in the slot where terminal device 1 performs its initial PSCCH / PSSCH transmission, and the resource for the initial PSCCH / PSSCH transmission of terminal device 1 and the reserved resource for the PSCCH / PSSCH transmission of another terminal device 1 are used. If sources overlap, the duration of a CPE may be determined from a set of durations for multiple CPEs, and the determined duration may be applied to the PSCCH / PSSCH transmission. Terminal device 1's PSCCH / PSSCH transmission is an initial transmission, and a reserved resource for another terminal device 1's PSCCH / PSSCH transmission exists in the slot where terminal device 1 performs its initial PSCCH / PSSCH transmission, and the resource for terminal device 1's initial PSCCH / PSSCH transmission and the reserved resource for the other terminal device 1's PSCCH / PSSCH transmission overlap. If not, the duration of a single CPE may be applied to PSCCH / PSSCH transmissions.

[0286] The physical layer of terminal device 1 receives a reserved resource in SCI format 1-A from another terminal device 1 within the sensing window, and then receives a resource notified from the upper layer that transmits PSCCH / PSSCH. However, it may be necessary to determine whether or not it overlaps with a reserved resource of another terminal device 1.

[0287] A fourth embodiment of the present invention involves determining whether the PSCCH / PSSCH transmission performed by terminal device 1 is an initial transmission, whether a reserved PSCCH / PSSCH resource of another terminal device 1 exists in the slot where terminal device 1 performs the initial PSCCH / PSSCH transmission, and whether the resources for the initial PSCCH / PSSCH transmission of terminal device 1 and the reserved PSCCH / PSSCH resources of the other terminal device 1 overlap. The channel access priority class of the initial PSCCH / PSSCH transmission of terminal device 1 is reserved. The duration of CPE may be determined based on whether it is higher than the class. For example, terminal equipment If the PSCCH / PSSCH transmission performed by terminal device 1 is not an initial transmission, the duration of a single CPE may be applied to the PSCCH / PSSCH transmission. If this is an initial transmission, and there is no reserved resource for PSCCH / PSSCH transmission by another terminal device 1 in the slot where terminal device 1 performs the initial PSCCH / PSSCH transmission, then the duration of multiple CPEs The duration of the CPE may be determined from the set, and the determined duration may be applied to the PSCCH / PSSCH transmission. Terminal device 1's PSCCH / PSSCH transmission is an initial transmission, and a reserved resource for another terminal device 1's PSCCH / PSSCH transmission exists in the slot where terminal device 1 performs its initial PSCCH / PSSCH transmission, and the resources for terminal device 1's initial PSCCH / PSSCH transmission and other terminal device 1 If the reserved resources for PSCCH / PSSCH do not overlap, the duration of a single CPE may be applied to PSCCH / PSSCH transmissions. Terminal device 1 considers the PSCCH / PSSCH transmissions performed by terminal device 1 to be initial transmissions. Therefore, if terminal device 1 has a reserved resource for PSCCH / PSSCH transmission in the slot where it performs initial PSCCH / PSSCH transmission, the PSCCH / PSSCH initial transmission resource of terminal device 1 and the PSCCH / PSSCH reserved resource of terminal device 1 overlap, and the channel access priority class of terminal device 1's initial PSCCH / PSSCH transmission uses the reserved resource of the other terminal device 1. If the channel access priority class of the PSCCH / PSSCH transmission of terminal device 1 is higher, the duration of the CPE may be determined from a set of multiple CPE durations, and the determined duration may be applied to the PSCCH / PSSCH transmission. Terminal device 1 will determine that the PSCCH / PSSCH transmission performed by terminal device 1 is an initial transmission. In this case, a reserved resource for PSCCH / PSSCH transmission exists for the slot where terminal device 1 performs its initial PSCCH / PSSCH transmission, and the PSCCH / PSSCH initial transmission resource of terminal device 1 and the reserved PSCCH / PSSCH resource of terminal device 1 overlap, and the channel access priority class for the initial PSCCH / PSSCH transmission of terminal device 1 uses the reserved resource. If the channel access priority class is not higher than that of terminal device 1's PSCCH / PSSCH transmission, the duration of a single CPE may be applied to the PSCCH / PSSCH transmission. Terminal device 1 is not connected to other terminal device 1. The channel access priority class may be notified via SCI. Terminal device 1 is notified via SCI of the L1 priority, which is the priority of PSSCH transmission of terminal device 1, and other terminal devices 1 The priority may be determined based on the PSSCH transmission priority L1 priority.

[0288] A fifth embodiment of the present invention involves determining whether the PSCCH / PSSCH transmission performed by terminal device 1 is an initial transmission, whether a reserved PSCCH / PSSCH resource of another terminal device 1 exists in the slot where terminal device 1 performs the initial PSCCH / PSSCH transmission, and whether the resources for the initial PSCCH / PSSCH transmission of terminal device 1 and the reserved PSCCH / PSSCH resources of the other terminal device 1 overlap. Alternatively, the duration of the CPE may be determined based on whether there is a large overlap between the resources for the initial PSCCH / PSSCH transmission of terminal device 1 and the reserved resources for PSCCH / PSSCH of other terminal device 1. For example, if the PSCCH / PSSCH transmission performed by terminal device 1 is not an initial transmission, a single CPE may be used. The duration may be applied to the PSCCH / PSSCH transmission. If the PSCCH / PSSCH transmission performed by terminal device 1 is an initial transmission, and there is no reserved resource for another terminal device 1's PSCCH / PSSCH transmission in the slot where terminal device 1 performs its initial PSCCH / PSSCH transmission, terminal device 1 will determine the duration of the CPE from a set of multiple CPE durations and apply the determined duration to the PSCCH / PSSCH transmission. It may be applied. Terminal device 1's PSCCH / PSSCH transmission is an initial transmission, and the slot in which terminal device 1 performs the initial PSCCH / PSSCH transmission is a PSCCH / PSSCH transmission from another terminal device 1. A reserved resource exists for the signal, and the resource for the initial transmission of terminal device 1's PSCCH / PSSCH and others If the reserved resources for PSCCH / PSSCH of terminal device 1 do not overlap, the duration of a single CPE may be applied to PSCCH / PSSCH transmission. Terminal device 1's PSCCH / PSSCH transmission is an initial transmission, and a reserved resource for PSCCH / PSSCH transmission of another terminal device 1 exists in the slot where terminal device 1 performs its initial PSCCH / PSSCH transmission, and the resources for terminal device 1's initial PSCCH / PSSCH transmission and the reserved resources for PSCCH / PSSCH of other terminal device 1 overlap, and the resources for terminal device 1's initial PSCCH / PSSCH transmission and the reserved resources for PSCCH / PSSCH of other terminal device 1 overlap. If the degree is large, the duration of the CPE may be determined from a set of durations for multiple CPEs, and the determined duration may be applied to the PSCCH / PSSCH transmission. Terminal device 1's PSCCH / PSSCH transmission is an initial transmission, and a reserved resource for the PSCCH / PSSCH transmission of another terminal device 1 exists in the slot where terminal device 1 performs its initial PSCCH / PSSCH transmission, and the resource for the initial PSCCH / PSSCH transmission of terminal device 1 and the reserved resource for the PSCCH / PSSCH of the other terminal device 1 overlap, and terminal If the overlap between the PSCCH / PSSCH initial transmission resources of terminal device 1 and the PSCCH / PSSCH reserved resources of other terminal device 1 is not significant, the duration of a single CPE may be applied to PSCCH / PSSCH transmission.

[0289] Terminal device 1 may determine that the degree of overlap is high if the number of overlapping subchannels between the resources of terminal device 1's initial transmission and the reserved resources of other terminal device 1 is equal to or greater than the first value. Terminal device 1 may determine that the degree of overlap is not high if the number of overlapping subchannels between the resources of terminal device 1's initial transmission and the reserved resources of other terminal device 1 is less than the first value. Terminal device 1 may determine that the degree of overlap is high if the number of overlapping resource blocks between the resources of terminal device 1's initial transmission and the reserved resources of other terminal device 1 is equal to or greater than the second value. Terminal device 1 may determine that the degree of overlap is not high if the number of overlapping resource blocks between the resources of terminal device 1's initial transmission and the reserved resources of other terminal device 1 is less than the second value. The first and second values ​​may be provided from the higher layer as RRC parameters.

[0290] A sixth embodiment of the present invention may determine the duration of the CPE based on whether the initial PSCCH / PSSCH transmission performed by terminal device 1 overlaps with a reserved resource for PSCCH / PSSCH transmission by another terminal device 1, and whether a reserved resource for PSCCH / PSSCH transmission by another terminal device 1 exists in the slot where terminal device 1 performs the initial PSCCH / PSSCH transmission. For example, terminal device If the initial PSCCH / PSSCH transmission performed by terminal device 1 overlaps with the reserved resource for PSCCH / PSSCH transmission by another terminal device 1, device 1 will select the duration of a CPE from a set of multiple CPE durations. The duration may be determined and applied to the PSCCH / PSSCH transmission. Alternatively, the duration of a single CPE may be applied to the PSCCH / PSSCH transmission. Terminal device 1 may apply the duration of a single CPE to the PSCCH / PSSCH transmission if the initial PSCCH / PSSCH transmission performed by terminal device 1 does not overlap with the reserved resource for PSCCH / PSSCH transmission of other terminal device 1, and if a reserved resource for PSCCH / PSSCH transmission of other terminal device 1 exists in the slot where terminal device 1 performs the initial PSCCH / PSSCH transmission. Terminal device 1 may apply the duration of a single CPE to the PSCCH / PSSCH transmission if the initial PSCCH / PSSCH transmission performed by terminal device 1 does not overlap with the reserved resource for PSCCH / PSSCH transmission of other terminal device 1, and if a reserved resource for PSCCH / PSSCH transmission of other terminal device 1 exists in the slot where terminal device 1 performs the initial PSCCH / PSSCH transmission. If there are no reserved resources for PSCCH / PSSCH transmission from other terminal device 1, the duration of the CPE is determined from a set of multiple CPE durations, and the determined duration is used for PSCCH / PSSCH transmission. It may be applied.

[0291] A seventh embodiment of the present invention involves the terminal device 1 determining whether the initial PSCCH / PSSCH transmission performed by the terminal device 1 overlaps with a reserved resource for PSCCH / PSSCH transmission by another terminal device 1, whether a reserved resource for PSCCH / PSSCH transmission by another terminal device 1 exists in the slot where the initial PSCCH / PSSCH transmission is performed by the terminal device 1, and the channel access of the initial PSCCH / PSSCH transmission by the terminal device 1. The duration of the CPE is determined based on whether the priority class is higher than the channel access priority class of the PSCCH / PSSCH transmission of another terminal device 1 using the reserved resource. This may also be the case. For example, if terminal device 1's initial PSCCH / PSSCH transmission overlaps with the reserved resource for PSCCH / PSSCH transmission of another terminal device 1, then the initial PSCCH / PSSCH transmission of terminal device 1 may overlap. The transmission channel access priority class is reserved. Other terminal device 1 If the channel access priority class of the PSCCH / PSSCH transmission is higher than that of the other terminal device, the duration of the CPE may be determined from a set of durations of multiple CPEs, and the determined duration may be applied to the PSCCH / PSSCH transmission. Terminal device 1 may have an initial PSCCH / PSSCH transmission that overlaps with the reserved resource of another terminal device 1's PSCCH / PSSCH transmission, and the initial PSCCH / PSSCH transmission of terminal device 1 The transmission channel access priority class is reserved. Other terminal device 1 If it is not higher than the channel access priority class of the PSCCH / PSSCH transmission, the duration of a single CPE may be applied to the PSCCH / PSSCH transmission. Terminal device 1 ensures that the initial PSCCH / PSSCH transmission performed by terminal device 1 does not overlap with the reserved resources of the PSCCH / PSSCH transmission of other terminal device 1. Terminal device 1 transmits PSCCH / PSSCH to the slot where it performs the initial PSCCH / PSSCH transmission. If a reserved resource exists, the duration of a single CPE may be applied to the PSCCH / PSSCH transmission. Terminal device 1 ensures that the initial PSCCH / PSSCH transmission performed by terminal device 1 does not overlap with the reserved resource of the PSCCH / PSSCH transmission of other terminal device 1, and that terminal device 1 performs the initial PSCCH / PSSCH transmission. If there is no reserved resource for PSCCH / PSSCH transmission from another terminal device 1 in the slot, the duration of a CPE may be determined from a set of multiple CPE durations, and the determined duration may be applied to PSCCH / PSSCH transmission. Terminal device 1 will determine the channel access priority of other terminal device 1. The class may be notified via SCI. Terminal device 1 may determine whether the priority is high or low based on the L1 priority of Terminal device 1's PSSCH transmission priority and the L1 priority of other Terminal device 1's PSSCH transmission notified via SCI.

[0292] An eighth embodiment of the present invention involves the following: whether the initial PSCCH / PSSCH transmission performed by terminal device 1 overlaps with the reserved resource for PSCCH / PSSCH transmission of another terminal device 1; whether a reserved resource for PSCCH / PSSCH transmission of another terminal device 1 exists in the slot where terminal device 1 performs the initial PSCCH / PSSCH transmission; and the resource for the initial PSCCH / PSSCH transmission of terminal device 1 and the other terminal The duration of the CPE may be determined based on whether the degree of overlap of the reserved resources of the PSCCH / PSSCH of device 1 is large or not. For example, terminal device 1 performs the initial transmission of the PSCCH / PSSCH that terminal device 1 performs. The signal does not overlap with the reserved resource for PSCCH / PSSCH transmission of other terminal device 1, and the degree of overlap between the resource for initial transmission of PSCCH / PSSCH of terminal device 1 and the reserved resource for PSCCH / PSSCH of other terminal device 1. If the duration is large, the duration of the CPE may be determined from a set of durations for multiple CPEs, and the determined duration may be applied to the PSCCH / PSSCH transmission. Terminal device 1 ensures that the initial PSCCH / PSSCH transmission performed by terminal device 1 does not overlap with the reserved resource of the PSCCH / PSSCH transmission of other terminal devices 1. The resources for initial transmission of PSCCH / PSSCH from device 1 and the reserved resources for PSCCH / PSSCH from other terminal device 1 If the degree of source overlap is not large, the duration of a single CPE may be applied to PSCCH / PSSCH transmission. Terminal device 1 performs the initial PSCCH / PSSCH transmission if the initial PSCCH / PSSCH transmission performed by terminal device 1 does not overlap with the reserved resource of the PSCCH / PSSCH transmission of another terminal device 1. If a reserved resource for PSCCH / PSSCH transmission from another terminal device 1 exists in the slot, the duration of a single CPE may be applied to the PSCCH / PSSCH transmission. If the initial PSCCH / PSSCH transmission performed by terminal device 1 does not overlap with the reserved resource for PSCCH / PSSCH transmission from another terminal device 1, and there is no reserved resource for PSCCH / PSSCH transmission from another terminal device 1 in the slot where terminal device 1 performs the initial PSCCH / PSSCH transmission, terminal device 1 may determine the duration of a CPE from a set of multiple CPE durations and apply the determined duration to the PSCCH / PSSCH transmission.

[0293] The duration of CPE may be the period obtained by subtracting the second period from the first period. The first period may be determined by the subcarrier interval, the symbol length based on the subcarrier interval, and the number of symbols. For example, the first period may be the period of 1 OFDM symbol when the subcarrier interval is 15 kHz. It may exist. The first period was the period of 2 OFDM symbols when the subcarrier spacing was 30 kHz. This is also acceptable. The first period may be the period of 4 OFDM symbols when the subcarrier spacing is 60 kHz. Good. Terminal device 1 may determine a second period in the same way as the method for determining the duration of the CPE in the embodiments of the present invention. Then, terminal device 1 may determine (calculate) the duration of the CPE to be applied to the PSCCH / PSSCH transmission based on the determined second period. For example, in the method for determining the duration of the CPE in Embodiment 1, terminal device 1 may determine the second period based on whether the PSCCH / PSSCH transmission is an initial transmission or not. If the PSCCH / PSSCH transmission performed by terminal device 1 is an initial transmission, terminal device 1 may determine the second period from a set of multiple periods. If the PSCCH / PSSCH transmission performed by terminal device 1 is not an initial transmission, terminal device 1 may determine the second period It may be determined as a single second period. In this invention, the second period may be one selected from a set of multiple periods. Alternatively, a single period may be selected. A single period and a set of multiple periods may be included in the resource pool configuration information. When terminal device 1 applies a set of multiple periods as a second period, terminal device 1 A single period may be determined based on the channel access priority class of the PSCCH / PSSCH transmission to be performed. A set of multiple periods to be applied to the second period is based on the channel access priority. The shortest period for priority class 1, the second shortest period for channel access priority class 2, and the third shortest period for channel access priority class 3. A single period may be assigned to channel access priority class 4 as the fourth shortest period. A single period may be longer than any of the periods included in the set of multiple periods. A single period may also be the shortest of the periods included in the set of multiple periods. A single period may also be the same as any of the periods included in the set of multiple periods. A single period may also be selected from any of the periods included in the set of multiple periods. The method for determining the second period may be the same as the method for determining the duration of the CPE in the embodiment.

[0294] Terminal device 1 comprises a control unit that determines the duration of the CPE based on whether the PSSCH transmission resource overlaps with the PSSCH transmission resource of another terminal device 1, and a transmission unit that applies the determined CPE duration to the PSSCH transmission and transmits it in a certain slot. Terminal device 1 performs PSSCH transmission The duration of the CPE is determined based on the degree of overlap between the resources of this device and the resources of the PSSCH transmission of other terminal device 1. The terminal device 1 comprises a control unit that makes a determination, and a transmission unit that applies the determined duration of the CPE to the PSSCH transmission and transmits it in a certain slot. If the PSSCH transmission resource of terminal device 1 overlaps with the PSSCH transmission resource of another terminal device 1, terminal device 1 selects the duration of one CPE from a set of multiple CPE durations, and if the PSSCH transmission resource does not overlap with the PSSCH transmission resource of another terminal device 1, terminal device 1 selects a predetermined duration of the CPE. If there is a large overlap with the resources of PSSCH transmission from terminal device 1, the duration settings of multiple CPEs will be... Select the duration of one CPE from the list, and set the PSSCH transmission resource and the PSSCH transmission of other terminal device 1. If the degree of overlap with the existing resources is small, select a predetermined CPE duration. Device 1's PSSCH transmission resources overlap with those of another terminal device 1, and the channel access priority of the PSSCH transmission of other terminal device 1 is the same as the channel access of the PSSCH transmission. If the priority is lower, channel access will be selected from a set of durations for multiple CPEs. Based on the priority class, select the duration of one CPE and the resources for PSSCH transmission. If the PSSCH transmission resources of another terminal device 1 overlap, and the channel access priority of the PSSCH transmission of other terminal device 1 is higher than the channel access priority of the PSSCH transmission, If the PSSCH transmission resource does not overlap with the PSSCH transmission resource of other terminal device 1, the predetermined CPE duration is selected. The channel access priority of the PSSCH transmission in position 1 is the channel access of the PSSCH transmission If the priority is lower, channel access will be selected from a set of durations for multiple CPEs. Based on the priority class, select the duration of one CPE and the resources for PSSCH transmission. The degree of overlap with the resources of PSSCH transmission on other terminal device 1 is high, and the channel access priority of PSSCH transmission on other terminal device 1 is higher than the channel access priority of the said PSSCH transmission. If there is no overlap, select a predetermined CPE duration. If the overlap between the PSSCH transmission resource and the PSSCH transmission resource of other terminal device 1 is small, select a predetermined CPE duration. In other words, the duration of the CPE applied to PSSCH transmission is determined based on one or more conditions. It may also be used as a fixed value.

[0295] Terminal device 1, in the unlicensed spectrum, uses all frequency domain lithography of the RB set. When using the - to perform an initial transmission of PSCCH / PSSCH in mode 2, the following conditions apply: The duration of a CPE may be determined from a set of multiple CPE durations. Terminal device 1 is a terminal If a reserved resource for PSCCH / PSSCH transmission from another terminal device 1 exists in the slot where device 1 performs the initial PSCCH / PSSCH transmission, the duration of the CPE is determined from a set of durations for multiple CPEs. It is also possible that terminal device 1, if there is no reserved resource for PSCCH / PSSCH transmission by another terminal device 1 in the slot where terminal device 1 performs initial PSCCH / PSSCH transmission, will use a single CPE duration. The duration of the CPE may be determined from a set of multiple CPE durations. Determine the duration of the corresponding CPE and apply the determined CPE duration to PSCCH / PSSCH transmission. You may do so.

[0296] When terminal device 1 performs initial transmission of PSCCH / PSSCH in mode 2 using a portion of the frequency domain resources of the RB set in the unlicensed spectrum, it performs multiple transmissions according to the following conditions: The duration of a CPE may be determined from a set of CPE durations. Terminal device 1 is a terminal device If a reserved resource for PSCCH / PSSCH transmission from another terminal device 1 exists in the slot where device 1 performs the initial PSCCH / PSSCH transmission, the duration of the CPE is determined from a set of multiple CPE durations. It is also possible that terminal device 1 determines the duration of a single CPE as the duration of the CPE if there is no reserved resource for PSCCH / PSSCH transmission by another terminal device 1 in the slot where terminal device 1 performs initial PSCCH / PSSCH transmission. Terminal device 1 selects the duration of a CPE from a set of multiple CPE durations. When determining the duration, consider the channel access priority class for PSCCH / PSSCH transmission. Determine the duration of the corresponding CPE, and apply the determined CPE duration to PSCCH / PSSCH transmission. That's fine.

[0297] The programs that operate in the base station device 3 and terminal device 1 according to the present invention may be programs that control the CPU (Central Processing Unit), etc. (programs that make the computer function) in order to realize the functions of the above embodiment according to the present invention. The information handled by these devices is temporarily stored in RAM (Random Access Memory) during processing. Then, it was stored in various ROMs such as Flash ROM (Read Only Memory) and HDD (Hard Disk Drive). It is stored and read, modified, and written to by the CPU as needed.

[0298] Furthermore, the terminal device 1 and a part of the base station device 3 in the above-described embodiment may be implemented using a computer. In that case, the program for implementing this control function may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be read by a computer system and executed.

[0299] Furthermore, the term "computer system" as used herein refers to a computer system built into terminal device 1 or base station device 3, and includes hardware such as the OS and peripheral devices. Also, "computer-readable recording medium" refers to portable media such as flexible disks, magneto-optical disks, ROMs, and CD-ROMs, as well as hard disks built into computer systems. This refers to storage devices such as [list of devices].

[0300] Furthermore, "computer-readable recording media" may include those that dynamically hold programs for a short period of time, such as communication lines used when transmitting programs via networks such as the Internet or communication lines such as telephone lines, as well as those that hold programs for a certain period of time, such as volatile memory within a computer system that acts as a server or client in such cases. In addition, the above-mentioned program may be for the purpose of realizing some of the functions described above, and may also be a program that can realize the above-mentioned functions in combination with a program already recorded in the computer system.

[0301] Terminal device 1 may consist of at least one processor and at least one memory containing computer program instructions (computer program). The computer program instructions (computer program) can be configured to use a processor to cause the terminal device 1 to perform the operations and processing described in the above embodiment. Good. The base station device 3 may consist of at least one processor and at least one memory containing computer program instructions (computer program). The memory and computer program instructions (computer program) are used by the processor to cause the base station device 3 to perform the operations and processing described in the above embodiment. A composition would also be acceptable.

[0302] Furthermore, the base station device 3 in the above-described embodiment is an assembly composed of multiple devices ( It can also be implemented as a device group. Each device constituting the device group may be a part of or all of the functions or functional blocks of the base station device 3 related to the above-described embodiment. It may include a set of functions or a set of functions as a device group. It is sufficient that it has a lock. Furthermore, the terminal device 1 related to the above embodiment is an assembly. It is also possible to communicate with base station equipment.

[0303] Furthermore, the base station device 3 in the above-described embodiment may be EUTRAN (Evolved Universal Terrestrial Radio Access Network) and / or NG-RAN (NextGen RAN, NR RAN). Also, the base station device 3 in the above-described embodiment may have some or all of the functions of a higher-level node for eNodeB and / or gNB.

[0304] Furthermore, some or all of the terminal device 1 and base station device 3 in the above-described embodiment may be implemented as LSIs, which are typically integrated circuits, or as chipsets. Each functional block of the terminal device 1 and base station device 3 may be individually chipped, or some or all of them may be integrated into a single chip. Furthermore, the method of integrated circuit implementation is not limited to LSIs, but may also include dedicated circuits, or It could also be implemented with a general-purpose processor. Furthermore, advances in semiconductor technology could replace LSIs with integrated circuits. If road infrastructure technology emerges, it will also be possible to use integrated circuits based on that technology.

[0305] Furthermore, in the embodiments described above, a terminal device was described as an example of a communication device, but the present invention This is not limited to the above, but can also be applied to stationary or non-movable electronic devices installed indoors or outdoors, such as terminal devices or communication devices for AV equipment, kitchen appliances, cleaning and washing machines, air conditioning equipment, office equipment, vending machines, and other household appliances.

[0306] While embodiments of this invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments, and design modifications and the like that do not depart from the gist of this 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 this invention. In addition, configurations in which elements described in each of the above embodiments that produce similar effects are substituted for each other are also included. [Explanation of Symbols]

[0307] 1 (1A, 1B, 1C) Terminal device 3(3A, 3B, 3C) Base station equipment 10, 30 Wireless Transceiver Unit 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 Wireless Resource Control Layer Processing Unit

Claims

1. A terminal device that determines the duration of the CPE based on whether the PSCCH / PSSCH transmission is an initial transmission or not. The control unit that makes the decision, A terminal device comprising: a transmitting unit that applies the duration of the CPE to the PSCCH / PSSCH transmission and transmits it in a certain slot.

2. If the aforementioned PSCCH / PSSCH transmission is an Initial transmission, the duration of the first CP is used. The terminal device according to claim 1, further comprising using the duration of a second CPE if the PSCCH / PSSCH transmission is not an initial transmission.

3. The duration of the first CPE is determined from a set of multiple durations according to the channel access priority class of the PSCCH / PSSCH transmission, and the duration of the second CPE is 1 The terminal device according to claim 2, wherein two durations are determined.

4. The terminal device according to claim 3, wherein the duration of the second CPE is shorter than any of the durations included in the set of durations of the plurality of CPEs.

5. A communication method used in a terminal device, comprising: determining the duration of CPE based on whether the PSCCH / PSSCH transmission is an initial transmission; applying the duration of CPE to the PSCCH / PSSCH transmission; and transmitting in a certain slot.

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