Terminal device, base station device, and communication method

Abstract

A terminal device comprising a physical layer processing unit and a media access control layer processing unit. The physical layer processing unit delivers HARQ information included in a received PDCCH to the media access control layer processing unit. The physical layer processing unit, on the basis of a PUSCH repetition number N provided from the base station device and an external parameter, determines the number of instances of PUSCH Ninstance. The determined number is delivered to the media access control layer processing unit. The media access control layer processing unit acquires one uplink grant from the PDCCH. The media access control layer processing unit further comprises a HARQ entity and a HARQ process. The HARQ entity generates Ninstance uplink grants based on the one uplink grant. The HARQ process, on the basis of the Ninstance uplink grants, sends Ninstance transmission instructions to the physical layer processing unit.

Description

[Technical Field]

[0001] The present invention relates to a terminal device, a base station device, and a communication method. This application claims priority to Japanese Patent Application No. 2021-74580, filed on April 27, 2021, the contents of which are incorporated herein by reference. [Background technology]

[0002] The radio access method and radio network for cellular mobile communications (hereinafter referred to as "Long Term Evolution (LTE)" or "EUTRA: Evolved Universal Terrestrial Radio Access") is being developed by the Third Generation Partnership Project (3GPP). rd This is being studied in the LTE Generation Partnership Project. In LTE, base station devices are also called eNodeBs (evolved NodeBs) and terminal devices are also called UEs (User Equipment). LTE is a cellular communication system in which areas covered by base station devices are arranged in multiple cell-like configurations. A single base station device may manage multiple serving cells.

[0003] 3GPP is currently studying the next-generation standard (NR: New Radio) to propose it for IMT (International Mobile Telecommunication)-2020, the standard for next-generation mobile communication systems formulated by the International Telecommunication Union (ITU) (Non-Patent Document 1). NR is expected 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 technology framework.

[0004] It is expected that functional extensions of cellular mobile communications such as NR will be studied. For example, as shown in Non-Patent Document 2, studies on the extension of NR functions have begun. [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] "New SID proposal: Study on New Radio Access Technology", RP-160671, NTT docomo, 3GPP TSG RAN Meeting #71, Goteborg, Sweden, 7th - 10th March, 2016. [Non-patent document 2] “Release 17 package for RAN”, RP-193216, RAN chairman, RAN1 chairman, RAN2 chairman, RAN3 chairman, 3GPP TSG RAN Meeting #86, Sitges, Spain, 9th ― 12th December, 2019 Summary of the Invention [Problem to be solved by the invention]

[0006] One aspect of the present invention provides a terminal device that performs efficient communication, a communication method used in the terminal device, a base station device that performs efficient communication, and a communication method used in the base station device. [Means for solving the problem]

[0007] (1) A first aspect of the present invention is a terminal device that communicates with a base station device, comprising a physical layer processing unit and a media access control layer processing unit, wherein the physical layer processing unit delivers HARQ information included in a received PDCCH to the media access control layer processing unit, and the physical layer processing unit determines the number of PUSCH instances N based on the number of PUSCH repetitions N and external parameters provided from the base station device. instance The determined number is delivered to the media access control layer processing unit, the media access control layer processing unit obtains one uplink grant from the PDCCH, the media access control layer processing unit further includes an HARQ entity and an HARQ process, and the HARQ entity determines N based on the one uplink grant. instance The HARQ process generates uplink grants for the N instance Based on the uplink grants, N instance The physical layer processing unit issues a transmission instruction for one transmission.

[0008] (2) A second aspect of the present invention is a base station device, comprising: a physical layer processing unit and a medium access control layer processing unit, wherein the physical layer processing unit transmits HARQ information on a PDCCH, and the physical layer processing unit determines the number of PUSCH instances N based on the number of PUSCH repetitions N and external parameters. instance Determine N instance Attempts to receive the PUSCH based on the uplink grant.

[0009] (3) A third aspect of the present invention is a communication method used in a terminal device communicating with a base station device, comprising the steps of delivering HARQ information included in a received PDCCH to the media access control layer processing unit, and determining a number N of PUSCH instances based on a number N of PUSCH repetitions and external parameters provided from the base station device. instance determining N based on the one uplink grant; delivering the determined number to the media access control layer processing unit; obtaining one uplink grant from the PDCCH; instance generating uplink grants;instance Based on the uplink grants, N instance and issuing a transmission instruction to the physical layer processing unit.

[0010] (4) A fourth aspect of the present invention is a communication method used in a base station device, comprising the steps of transmitting HARQ information on a PDCCH, and determining a number N of instances of a PUSCH based on a number N of repetitions of a PUSCH and an external parameter. instance determining N instance and attempting to receive the PUSCH based on the uplink grants. [Effects of the Invention]

[0011] According to one aspect of the present invention, a terminal device can perform communication efficiently, and a base station device can perform communication efficiently. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a conceptual diagram of a wireless communication system according to an aspect of the present embodiment. [Figure 2] 10 is an example showing the relationship between a subcarrier spacing setting μ, the number of OFDM symbols per slot Nslot symb, and a cyclic prefix (CP) setting according to one aspect of the present embodiment. [Figure 3] FIG. 10 is a diagram illustrating an example of a method for configuring a resource grid according to an aspect of the present embodiment. [Figure 4] FIG. 3 is a diagram illustrating an example of the configuration of a resource grid 3001 according to an aspect of the present embodiment. [Figure 5] 2 is a schematic block diagram illustrating an example of the configuration of a base station device 3 according to one aspect of the present embodiment. FIG. [Figure 6] 1 is a schematic block diagram showing an example of the configuration of a terminal device 1 according to an aspect of the present embodiment. [Figure 7] FIG. 2 is a diagram illustrating an example of the configuration of an SS / PBCH block according to one aspect of this embodiment. [Figure 8]FIG. 10 is a diagram illustrating an example of a monitoring opportunity for a set of search areas according to one aspect of the present embodiment. [Figure 9] FIG. 2 is a diagram illustrating an example of the configuration of a medium access control layer processing unit 15 according to one aspect of the present embodiment. [Figure 10] FIG. 12 is a diagram illustrating an example of the configuration of an encoding processor unit 12000 according to one aspect of this embodiment. [Figure 11] FIG. 10 is a diagram illustrating an example of a bit selection procedure according to one aspect of the present embodiment. [Figure 12] FIG. 1 illustrates a concept of a circular buffer according to one aspect of the present embodiment. [Figure 13] FIG. 10 is a diagram illustrating an example of multi-slot transmission of a PUSCH according to an aspect of the present embodiment. [Figure 14] FIG. 10 is a diagram illustrating an example of multi-slot transmission of a PUSCH according to an aspect of the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present invention will be described.

[0014] floor(C) may be a floor function for real number C. For example, floor(C) may be a function that outputs the largest integer not exceeding real number C. ceil(D) may be a ceiling function for real number D. For example, ceil(D) may be a function that outputs the smallest integer not below real number D. mod(E,F) may be a function that outputs the remainder when E is divided by F. mod(E,F) may be a function that outputs a value corresponding to the remainder when E is divided by F. exp(G) = e^G, where e is Napier's constant. H^I represents H to the Ith power. max(J,K) is a function that outputs the maximum value of J and K. Here, max(J,K) is a function that outputs J or K when J and K are equal. min(L,M) is a function that outputs the maximum value of L and M. Here, min(L,M) is a function that outputs L or M when L and M are equal. round(N) is a function that outputs the integer value that is closest to N.

[0015] Fig. 1 is a conceptual diagram of a wireless communication system according to one aspect of the present embodiment. In Fig. 1, the wireless communication system includes at least terminal devices 1A to 1C and a base station device 3 (BS#3: Base station#3). Hereinafter, the terminal devices 1A to 1C will be collectively referred to as terminal device 1 (UE#1: User Equipment#1), and the terminal device communicating with the base station device 3 will also be referred to as terminal device 1 (UE#1: User Equipment#1).

[0016] In the wireless communication system, at least one communication method may be used. The one communication method may be OFDM (Orthogonal Frequency Division Multiplex). For example, in the downlink, which is communication from the base station device 3 to the terminal device 1, at least CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplex) may be used. In the uplink, which is communication from the terminal device 1 to the base station device 3, at least one of CP-OFDM or DFT-s-OFDM (Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplex) may be used. DFT-s-OFDM is a communication method in which modified precoding is applied prior to signal generation in CP-OFDM. Here, modified precoding is also referred to as DFT precoding.

[0017] The base station device 3 may be configured to include one or more transmitting devices (or transmission points, transmitting / receiving devices, transmitting / receiving points). When the base station device 3 is configured by multiple transmitting devices, the multiple transmitting devices may be located at different geographical locations or may be located at the same geographical location. When multiple transmitting devices are located at the same geographical location, the multiple transmitting devices may be configured as a single device.

[0018] The base station device 3 may provide one or more serving cells. A serving cell may be defined as a set of resources used for wireless communication. A serving cell is also called a cell.

[0019] A serving cell may be configured to include at least one downlink component carrier and / or one uplink component carrier. A serving cell may be configured to include at least two or more downlink component carriers and / or two or more uplink component carriers. A downlink component carrier and an uplink component carrier are also referred to as a component carrier.

[0020] For example, one resource grid may be provided for one component carrier. Alternatively, one resource grid may be provided for a combination of one component carrier and a certain subcarrier spacing configuration μ. Here, the subcarrier spacing configuration μ is also called numerology. The resource grid is defined as N size,μ grid,x N RB sc The resource grid is divided into common resource blocks N start,μ grid,x Common resource block N start,μ grid,x is also called the reference point of the resource grid. The resource grid is subframe,μ symb The resource grid includes OFDM symbols, where x is a subscript indicating the transmission direction, either downlink or uplink. A resource grid is given for a set of antenna ports p, a subcarrier spacing setting μ, and a transmission direction x.

[0021] N size,μ grid,x and N start,μ grid,xis given based at least on a higher layer parameter (CarrierBandwidth). The higher layer parameter is also called an SCS specific carrier. One resource grid corresponds to one SCS specific carrier. One component carrier may comprise one or more SCS specific carriers. The SCS specific carriers may be included in the system information. One subcarrier spacing setting μ may be given for each SCS specific carrier.

[0022] The subcarrier spacing (SCS) Δf is Δf=2 μ For example, the subcarrier spacing setting μ may represent any of 0, 1, 2, 3, or 4.

[0023] FIG. 2 shows a subcarrier spacing setting μ and the number of OFDM symbols per slot N according to one aspect of this embodiment. slot symb 2A, for example, when the subcarrier spacing setting μ is 2 and the CP setting is normal cyclic prefix (CP), N slot symb =14, N frame,μ slot =40, N subframe,μ slot 2B, for example, when the subcarrier spacing setting μ is 2 and the CP setting is an extended cyclic prefix (CP), N slot symb =12, N frame,μ slot =40, N subframe,μ slot =4.

[0024] In the wireless communication system according to one aspect of the present embodiment, a time unit T is used to express a length in the time domain. c may be used. Time unit T c is Tc =1 / (Δf max N f ) Δf max = 480 kHz. f = 4096. The constant κ is κ = Δf max N f / (Δf ref N f,ref )=64. Δf ref is 15kHz. f,ref is 2048.

[0025] The transmission of the signal in the downlink and / or the transmission of the signal in the uplink may be performed over a period of length T f The radio frame (system frame, frame) may be organized into T f =(Δf max N f / 100)·T s = 10 ms. "·" indicates multiplication. A radio frame consists of 10 subframes. The length of a subframe is T sf =(Δf max N f / 1000)·T s = 1 ms. The number of OFDM symbols per subframe is N subframe,μ symb =N slot symb N subframe,μ slot is.

[0026] An OFDM symbol is a time domain unit of a communication system. For example, an OFDM symbol may be a time domain unit of CP-OFDM. Also, an OFDM symbol may be a time domain unit of DFT-s-OFDM.

[0027] A slot may consist of multiple OFDM symbols, for example, N consecutive OFDM symbols. slot symb OFDM symbols may be included in one slot. For example, N slot symb =14 may also be used.

[0028] The slots may be indexed in the time domain, e.g., slot index n μ s ranges from 0 to N in the subframe subframe,μ slot The slot index n may be given in ascending order as integer values ​​in the range -1. μ s,f ranges from 0 to N in the radio frame. frame,μ slot Integer values ​​in the range -1 to +1 may be given in ascending order.

[0029] Fig. 3 is a diagram showing an example of a resource grid configuration method according to one aspect of the present embodiment. The horizontal axis in Fig. 3 represents the frequency domain. Fig. 3 shows an example of a resource grid configuration for subcarrier spacing setting μ1 in component carrier 300, and an example of a resource grid configuration for subcarrier spacing setting μ2 in the certain component carrier. In this way, one or more subcarrier spacings may be configured for a certain component carrier.

[0030] Point 3000 is an identifier for identifying a certain subcarrier. Point 3000 is also referred to as point A. Common resource block (CRB) set 3100 is a set of common resource blocks for subcarrier spacing setting μ1.

[0031] Of the common resource block set 3100, the common resource block including point 3000 (the block indicated by the diagonal line slanting upward to the right in FIG. 3) is also called the reference point of the common resource block set 3100. The reference point of the common resource block set 3100 is the common resource block with index 0 for the subcarrier spacing setting μ1.

[0032] The offset 3011 is the offset from the reference point of the common resource block set 3100 to the reference point of the resource grid 3001. The offset 3011 is indicated by the number of common resource blocks for the subcarrier spacing setting μ1. The resource grid 3001 is N size,μ grid1,x It contains common resource blocks.

[0033] The offset 3013 is the distance from the reference point of the resource grid 3001 to the reference point (N start,μ BWP,i1 ) The reference point of the BWP 3003 with index i1 is the physical resource block with index 0 for that BWP.

[0034] Common resource block set 3200 is a set of common resource blocks for subcarrier spacing setting μ2.

[0035] Of the common resource block set 3200, the common resource block including point 3000 (the block indicated by the diagonal line slanting downwards to the left in FIG. 3) is also called the reference point of the common resource block set 3200. The reference point of the common resource block set 3200 is the common resource block with index 0 for the subcarrier spacing setting μ2.

[0036] The offset 3012 is the offset from the reference point of the common resource block set 3200 to the reference point of the resource grid 3002. The offset 3012 is indicated by the number of common resource blocks relative to the subcarrier spacing μ. The resource grid 3002 is N size,μ grid2,x It contains common resource blocks.

[0037] The offset 3014 is the distance from the reference point of the resource grid 3002 to the reference point of the BWP 3004 with index i2 (Nstart,μ BWP,i2 ) The reference point of the BWP 3004 with index i2 is the physical resource block with index 0 for that BWP.

[0038] 4 is a diagram showing an example of the configuration of a resource grid 3001 according to one aspect of this embodiment. In the resource grid of FIG. 4, the horizontal axis represents OFDM symbol index l sym and the vertical axis is the subcarrier index k sc The resource grid 3001 is size,μ grid1,x N RB sc contains N subcarriers, subframe,μ symb Within the resource grid, subcarrier index k sc and OFDM symbol index l sym The resource specified by is also called a resource element (RE).

[0039] The frequency domain of the resource grid corresponds to an SCS-specific carrier. The configuration of the SCS-specific carrier includes an offset and part or all of a band configuration. The offset indicates the offset from the reference point of the common resource block set to the reference point of the resource grid. For example, offset 3011 and offset 3012 are offsets included in the configuration of the SCS-specific carrier. The band configuration also indicates the bandwidth of the SCS-specific carrier. Here, the bandwidth of the SCS-specific carrier corresponds to the bandwidth of the resource grid. For example, N size,μ grid1,x , and N size,μ grid2,x is the band setting included in the SCS specific carrier setting.

[0040] Resource Block (RB) is N RB scA resource block includes N consecutive subcarriers. A resource block is a collective term for a common resource block, a physical resource block (PRB), and a virtual resource block (VRB). For example, RB sc =12.

[0041] In the common resource block set for a given subcarrier spacing setting μ, the common resource blocks are indexed in the frequency domain in ascending order starting from 0. For a given subcarrier spacing setting μ, the common resource block with index 0 contains (or collides with, or coincides with) point 3000. The index n of the common resource block for a given subcarrier spacing setting μ μ CRB is n μ CRB =ceil(k sc,c / N RB sc ) relationship is satisfied. Here, k sc,c The subcarrier with k = 0 is a subcarrier with the same center frequency as the subcarrier corresponding to point 3000. sc,c denotes the index of the subcarrier in the common resource block set.

[0042] In the physical resource block set for a given subcarrier spacing setting μ, the physical resource blocks are indexed in ascending order in the frequency domain starting from 0. The index n of a physical resource block for a given subcarrier spacing setting μ is μ PRB is n μ CRB =n μ PRB +N start,μ BWP,i where N start,μ BWP,i denotes the reference point of the BWP with index i.

[0043] A BWP may be configured as a portion of the frequency band of a component carrier. For example, a BWP may be defined as a subset of common resource blocks included in a resource grid. For example, a BWP may be defined as a reference point N of the BWP. start,μ BWP,i Starting with N size,μ BWP,i The BWP configured for the downlink may be referred to as a downlink BWP. The BWP configured for the uplink may be referred to as an uplink BWP.

[0044] An antenna port may be defined such that the channel over which a symbol on the antenna port is conveyed can be inferred from the channel over which another symbol on the same antenna port is conveyed. For example, a channel may correspond to a physical channel. Furthermore, a symbol may correspond to a modulation symbol mapped to a resource element.

[0045] Two antenna ports are considered to be in a Quasi Co-Located (QCL) relationship if the large-scale properties of a channel through which symbols are transmitted at one antenna port can be estimated from the channel through which symbols are transmitted at the other antenna port. The large-scale properties may include at least long-range channel properties. The large-scale properties may include at least some or all of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters. The first and second antenna ports being QCL with respect to beam parameters may be when the receive beam assumed by the receiver for the first antenna port is the same as the receive beam assumed by the receiver for the second antenna port. The first antenna port and the second antenna port being QCLs in terms of beam parameters may mean that the transmission beam assumed by the receiving side for the first antenna port and the transmission beam assumed by the receiving side for the second antenna port are the same. The terminal device 1 may assume that the two antenna ports are QCLs if the large-scale characteristics of a channel through which symbols are transmitted at one antenna port can be estimated from the channel through which symbols are transmitted at another antenna port. The two antenna ports being QCLs may mean that the two antenna ports are assumed to be QCLs.

[0046] Carrier aggregation may be performing communication using a plurality of aggregated serving cells. Also, carrier aggregation may be performing communication using a plurality of aggregated component carriers. Also, carrier aggregation may be performing communication using a plurality of aggregated downlink component carriers. Also, carrier aggregation may be performing communication using a plurality of aggregated uplink component carriers.

[0047] Fig. 5 is a schematic block diagram showing an example configuration of a base station device 3 according to one aspect of the present embodiment. As shown in Fig. 5, the base station device 3 includes at least a radio transceiver unit (physical layer processing unit) 30 and / or part or all of an upper layer processing unit 34. The radio transceiver unit 30 includes at least an antenna unit 31, an RF (Radio Frequency) unit 32, and part or all of a baseband unit 33. The upper layer processing unit 34 includes at least a medium access control layer (MAC layer) processing unit 35 and part or all of a radio resource control (RRC) layer processing unit 36.

[0048] The wireless transceiver 30 includes at least a wireless transmitter 30a and part or all of a wireless receiver 30b. Here, the baseband unit included in the wireless transmitter 30a and the baseband unit included in the wireless receiver 30b may have the same or different device configurations. Furthermore, the RF unit included in the wireless transmitter 30a and the RF unit included in the wireless receiver 30b may have the same or different device configurations. Furthermore, the antenna unit included in the wireless transmitter 30a and the antenna unit included in the wireless receiver 30b may have the same or different device configurations.

[0049] For example, the radio transmitting unit 30a may generate a baseband signal of a downlink physical channel, or may generate a baseband signal of a downlink physical signal.

[0050] For example, the radio receiver 30b may attempt to detect information transmitted by an uplink physical channel, i.e., the radio receiver 30b may attempt to detect information transmitted by an uplink physical signal.

[0051] The upper layer processing unit 34 outputs downlink data (e.g., transport blocks) to the radio transceiver unit 30 (or the radio transmitter unit 30a). The upper layer processing unit 34 performs some or all of the processing of the MAC (Medium Access Control) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the RRC layer.

[0052] The medium access control layer processing unit 35 included in the upper layer processing unit 34 performs MAC layer processing.

[0053] The radio resource control layer processing unit 36 ​​included in the upper layer processing unit 34 performs processing of the RRC layer. The radio resource control layer processing unit 36 ​​manages various setting information / parameters (e.g., RRC parameters) of the terminal device 1. The radio resource control layer processing unit 36 ​​sets the RRC parameters based on an RRC message received from the terminal device 1.

[0054] The radio transceiver 30 (or the radio transmitter 30a) performs some or all of modulation processing, encoding processing, and transmission processing. The radio transceiver 30 (or the radio transmitter 30a) generates a physical signal by performing some or all of modulation processing, encoding processing, and baseband signal generation (conversion to a time-continuous signal) processing on downlink data. The radio transceiver 30 (or the radio transmitter 30a) may map the physical signal to a certain component carrier. The radio transceiver 30 (or the radio transmitter 30a) transmits the generated physical signal.

[0055] The radio transceiver 30 (or the radio receiver 30b) performs some or all of the demodulation process, the decoding process, and the reception process. The radio transceiver 30 (or the radio receiver 30b) outputs information detected based on at least the demodulation process and the decoding process for the received physical signal to the upper layer processing unit 34.

[0056] The wireless transceiver unit 30 (or the wireless receiver unit 30b) may perform carrier sensing prior to transmitting a physical signal.

[0057] The RF unit 32 converts the signal received via the antenna unit 31 into a baseband signal by quadrature demodulation and removes unnecessary frequency components, and outputs the analog signal to the baseband unit.

[0058] The baseband unit 33 converts the analog signal input from the RF unit 32 into a digital signal. The baseband unit 33 removes a portion corresponding to a CP (Cyclic Prefix) from the converted digital signal, and performs a Fast Fourier Transform (FFT) on the signal from which the CP has been removed to extract a signal in the frequency domain.

[0059] The baseband unit 33 performs an Inverse Fast Fourier Transform (IFFT) on the downlink data to generate OFDM symbols, adds CPs to the generated OFDM symbols, generates baseband digital signals, and converts the baseband digital signals into analog signals. The baseband unit 33 outputs the converted analog signals to the RF unit 32. Prior to the IFFT, modified precoding may be applied to the downlink data.

[0060] The RF unit 32 uses a low-pass filter to remove unnecessary frequency components from the analog signal input from the baseband unit 33, up-converts the analog signal to a carrier frequency, and transmits it via the antenna unit 31. The RF unit 32 may also have a function to control transmission power. The RF unit 32 is also referred to as a transmission power control unit.

[0061] For the terminal device 1, one or more serving cells (or component carriers, downlink component carriers, uplink component carriers) may be configured.

[0062] Each of the serving cells configured for the terminal device 1 may be any of a PCell (Primary cell), a PSCell (Primary SCG cell), and an SCell (Secondary Cell).

[0063] The PCell is a serving cell included in an MCG (Master Cell Group). The PCell is a cell on which an initial connection establishment procedure or a connection re-establishment procedure is performed by the terminal device 1 (the cell on which the procedure has been performed).

[0064] The PSCell is a serving cell included in an SCG (Secondary Cell Group). The PSCell is a serving cell to which random access is performed by the terminal device 1 in a reconfiguration procedure with synchronization.

[0065] An SCell may be included in either an MCG or an SCG.

[0066] A serving cell group (cell group) is a term that includes at least an MCG and an SCG. A serving cell group may include one or more serving cells (or component carriers). One or more serving cells (or component carriers) included in a serving cell group may be operated by carrier aggregation.

[0067] One or more downlink BWPs may be configured for each serving cell (or downlink component carrier). One or more uplink BWPs may be configured for each serving cell (or uplink component carrier).

[0068] Of one or more downlink BWPs configured for a serving cell (or a downlink component carrier), one downlink BWP may be set as an active downlink BWP (or one downlink BWP may be activated). Of one or more uplink BWPs configured for a serving cell (or an uplink component carrier), one uplink BWP may be set as an active uplink BWP (or one uplink BWP may be activated).

[0069] The PDSCH, PDCCH, and CSI-RS may be received in an active downlink BWP. The terminal device 1 may receive the PDSCH, PDCCH, and CSI-RS in an active downlink BWP. The PUCCH and PUSCH may be transmitted in an active uplink BWP. The terminal device 1 may transmit the PUCCH and PUSCH in an active uplink BWP. The active downlink BWP and the active uplink BWP are also referred to as active BWPs.

[0070] The PDSCH, PDCCH, and CSI-RS do not have to be received in downlink BWPs (inactive downlink BWPs) other than the active downlink BWP. The terminal device 1 does not have to receive the PDSCH, PDCCH, and CSI-RS in downlink BWPs other than the active downlink BWP. The PUCCH and PUSCH do not have to be transmitted in uplink BWPs (inactive uplink BWPs) other than the active uplink BWP. The terminal device 1 does not have to transmit the PUCCH and PUSCH in uplink BWPs other than the active uplink BWP. The inactive downlink BWP and the inactive uplink BWP are also referred to as inactive BWPs.

[0071] A downlink BWP switch is used to deactivate one active downlink BWP and activate any inactive downlink BWP other than the one active downlink BWP. The downlink BWP switch may be controlled by a BWP field included in downlink control information. The downlink BWP switch may also be controlled based on higher layer parameters.

[0072] The uplink BWP switching is used to deactivate one active uplink BWP and activate any inactive uplink BWP other than the one active uplink BWP. The uplink BWP switching may be controlled by a BWP field included in the downlink control information. The uplink BWP switching may also be controlled based on higher layer parameters.

[0073] Of one or more downlink BWPs configured for a serving cell, two or more downlink BWPs may not be configured as active downlink BWPs.For a serving cell, one downlink BWP may be active at a given time.

[0074] Of one or more uplink BWPs configured for a serving cell, two or more uplink BWPs may not be configured as active uplink BWPs. At any given time, one uplink BWP may be active for a serving cell.

[0075] Fig. 6 is a schematic block diagram showing an example configuration of a terminal device 1 according to one aspect of the present embodiment. As shown in Fig. 6, the terminal device 1 includes at least a radio transmission / reception unit (physical layer processing unit) 10 and part or all of an upper layer processing unit 14. The radio transmission / reception unit 10 includes at least an antenna unit 11, an RF unit 12, and part or all of a baseband unit 13. The upper layer processing unit 14 includes at least a medium access control layer processing unit 15 and part or all of a radio resource control layer processing unit 16.

[0076] The wireless transceiver 10 includes at least a wireless transmitter 10a and part or all of a wireless receiver 10b. Here, the baseband unit 13 included in the wireless transmitter 10a and the baseband unit 13 included in the wireless receiver 10b may have the same or different device configurations. The RF unit 12 included in the wireless transmitter 10a and the RF unit 12 included in the wireless receiver 10b may have the same or different device configurations. The antenna unit 11 included in the wireless transmitter 10a and the antenna unit 11 included in the wireless receiver 10b may have the same or different device configurations.

[0077] For example, the radio transmission unit 10a may generate a baseband signal of an uplink physical channel, or may generate a baseband signal of an uplink physical signal.

[0078] For example, the radio receiver 10b may attempt to detect information transmitted by a downlink physical channel. For example, the radio receiver 10b may attempt to detect information transmitted by an uplink physical signal.

[0079] The upper layer processing unit 14 outputs uplink data (e.g., a transport block) to the radio transceiver unit 10 (or the radio transmitter unit 10a). The upper layer processing unit 14 performs some or all of the processing of the MAC layer, the integrated packet data protocol layer, the radio link control layer, and the RRC layer.

[0080] The medium access control layer processing unit 15 included in the upper layer processing unit 14 performs processing of the MAC layer.

[0081] The radio resource control layer processing unit 16 included in the upper layer processing unit 14 performs processing of the RRC layer. The radio resource control layer processing unit 16 manages various setting information / parameters (e.g., RRC parameters) of the terminal device 1. The radio resource control layer processing unit 16 sets the RRC parameters based on an RRC message received from the base station device 3.

[0082] The radio transceiver 10 (or the radio transmitter 10a) performs some or all of modulation processing, encoding processing, and transmission processing. The radio transceiver 10 (or the radio transmitter 10a) generates a physical signal by performing some or all of modulation processing, encoding processing, and baseband signal generation (conversion to a time-continuous signal) processing on uplink data. The radio transceiver 10 (or the radio transmitter 10a) may place the physical signal in a certain BWP (active uplink BWP). The radio transceiver 10 (or the radio transmitter 10a) transmits the generated physical signal.

[0083] The radio transceiver 10 (or the radio receiver 10b) performs part or all of demodulation processing, decoding processing, and reception processing. The radio transceiver 10 (or the radio receiver 30b) may receive a physical signal in a certain BWP (active downlink BWP) of a certain serving cell. The radio transceiver 10 (or the radio receiver 10b) outputs information detected based at least on the demodulation processing and decoding processing of the received physical signal to the upper layer processing unit 14.

[0084] The wireless transceiver 10 (wireless receiver 10b) may perform carrier sensing prior to transmitting a physical signal.

[0085] The RF unit 12 converts the signal received via the antenna unit 11 into a baseband signal by quadrature demodulation and removes unnecessary frequency components. The RF unit 12 outputs the processed analog signal to the baseband unit 13.

[0086] The baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal. The baseband unit 13 removes a portion corresponding to a cyclic prefix (CP) from the converted digital signal, and performs a fast Fourier transform (FFT) on the signal from which the CP has been removed to extract a signal in the frequency domain.

[0087] The baseband unit 13 performs an Inverse Fast Fourier Transform (IFFT) on the uplink data to generate OFDM symbols, adds CPs to the generated OFDM symbols, generates baseband digital signals, and converts the baseband digital signals into analog signals. The baseband unit 13 outputs the converted analog signals to the RF unit 12. Prior to the IFFT, modified precoding may be applied to the uplink data.

[0088] The RF unit 12 uses a low-pass filter to remove unnecessary frequency components from the analog signal input from the baseband unit 13, up-converts the analog signal to a carrier frequency, and transmits it via the antenna unit 11. The RF unit 12 may also have a function to control transmission power. The RF unit 12 is also referred to as a transmission power control unit.

[0089] The physical signals (signals) will be explained below.

[0090] The physical signal is a general term for a downlink physical channel, a downlink physical signal, an uplink physical channel, and an uplink physical channel. The physical channel is a general term for a downlink physical channel and an uplink physical channel. The physical signal is a general term for a downlink physical signal and an uplink physical signal.

[0091] The uplink physical channel may correspond to a set of resource elements carrying information generated in a higher layer. The uplink physical channel may be a physical channel used in an uplink component carrier. The uplink physical channel may be transmitted by the terminal device 1. The uplink physical channel may be received by the base station device 3. In the uplink of the wireless communication system according to one aspect of the present embodiment, at least some or all of the following uplink physical channels may be used. ·PUCCH (Physical Uplink Control CHannel) ·PUSCH (Physical Uplink Shared CHannel) ·PRACH(Physical Random Access CHannel)

[0092] The PUCCH may be used to transmit uplink control information (UCI). The PUCCH may be transmitted to deliver, transmit, or convey the uplink control information. The uplink control information may be mapped to the PUCCH. The terminal device 1 may transmit the PUCCH in which the uplink control information is mapped. The base station device 3 may receive the PUCCH in which the uplink control information is mapped.

[0093] The uplink control information (uplink control information bits, uplink control information sequence, uplink control information type) includes at least some or all of channel state information (CSI), scheduling request (SR), and hybrid automatic repeat request ACKnowledgement (HARQ-ACK) information.

[0094] The channel state information is also referred to as a channel state information bit or a channel state information sequence. The scheduling request is also referred to as a scheduling request bit or a scheduling request sequence. The HARQ-ACK information is also referred to as a HARQ-ACK information bit or a HARQ-ACK information sequence.

[0095] The HARQ-ACK information may include at least a HARQ-ACK corresponding to a transport block (or a TB: Transport block, MAC PDU: Medium Access Control Protocol Data Unit, DL-SCH: Downlink-Shared Channel, UL-SCH: Uplink-Shared Channel, PDSCH: Physical Downlink Shared Channel, PUSCH: Physical Uplink Shared CHannel). The HARQ-ACK may indicate an acknowledgement (ACK) or a negative acknowledgement (NACK) corresponding to the transport block. The ACK may indicate that the decoding of the transport block has been successfully completed. The NACK may indicate that the decoding of the transport block has not been successfully completed. The HARQ-ACK information may include a HARQ-ACK codebook including one or more HARQ-ACK bits.

[0096] Correspondence between HARQ-ACK information and a transport block may mean that the HARQ-ACK information corresponds to a PDSCH used to transmit the transport block.

[0097] The HARQ-ACK may indicate an ACK or NACK corresponding to one Code Block Group (CBG) included in the transport block.

[0098] The scheduling request may be used at least to request PUSCH (or UL-SCH) resources for an initial transmission. The scheduling request bit may be used to indicate either a positive SR or a negative SR. The scheduling request bit indicating a positive SR is also referred to as "a positive SR is transmitted." A positive SR may indicate that PUSCH (or UL-SCH) resources are requested by the terminal device 1 for the initial transmission. A positive SR may indicate that a scheduling request is triggered by a higher layer. A positive SR may be transmitted when transmission of a scheduling request is instructed by a higher layer. The scheduling request bit indicating a negative SR is also referred to as "a negative SR is transmitted." A negative SR may indicate that PUSCH (or UL-SCH) resources are not requested by the terminal device 1 for the initial transmission. A negative SR may indicate that a scheduling request is not triggered by a higher layer. A negative SR may be transmitted when no higher layer indicates that a scheduling request should be transmitted.

[0099] The channel state information may include at least some or all of a Channel Quality Indicator (CQI), a Precoder Matrix Indicator (PMI), and a Rank Indicator (RI). The CQI is an indicator related to the quality of a propagation path (e.g., propagation strength) or the quality of a physical channel, the PMI is an indicator related to a precoder, and the RI is an indicator related to a transmission rank (or the number of transmission layers).

[0100] The channel state information may be provided based at least on receiving a physical signal (e.g., CSI-RS) used at least for channel measurement. The channel state information may be selected by the terminal device 1 based at least on receiving a physical signal used at least for channel measurement. The channel measurement may include interference measurement.

[0101] The PUCCH may correspond to a PUCCH format. The PUCCH may be a set of resource elements used to convey the PUCCH format. The PUCCH may include the PUCCH format.

[0102] The PUSCH may be used to transmit transport blocks and / or uplink control information. The PUSCH may be used to transmit transport blocks and / or uplink control information corresponding to the UL-SCH. The PUSCH may be used to transmit transport blocks and / or uplink control information. The PUSCH may be used to transmit transport blocks and / or uplink control information corresponding to the UL-SCH. A transport block may be mapped to the PUSCH. A transport block corresponding to the UL-SCH may be mapped to the PUSCH. Uplink control information may be mapped to the PUSCH. The terminal device 1 may transmit a PUSCH in which a transport block and / or uplink control information is mapped. The base station device 3 may receive a PUSCH in which a transport block and / or uplink control information is mapped.

[0103] The PRACH may be used to transmit a random access preamble. The PRACH may be used to transmit a random access preamble. u,v (n) is x u,v (n)=x u (mod(n+C v ,L RA)) is defined by x u may be a ZC (Zadoff-Chu) sequence. u x u =exp(-jπui(i+1) / L RA ) where j is the imaginary unit and π is the ratio of the circumference of a circle to its circumference. C v corresponds to the cyclic shift of the PRACH sequence. RA corresponds to the length of the PRACH sequence. RA is 839 or 139. i ranges from 0 to L RA u is an integer in the range of -1. u is a sequence index for the PRACH sequence. The terminal device 1 may transmit the PRACH. The base station device 3 may receive the PRACH.

[0104] For a given PRACH opportunity, 64 random access preambles are defined. The random access preambles are cyclically shifted C v , and the sequence index u for the PRACH sequence. An index may be assigned to each of the identified 64 random access preambles.

[0105] The uplink physical signal may correspond to a set of resource elements. The uplink physical signal may not carry information generated in a higher layer. The uplink physical signal may be a physical signal used in an uplink component carrier. The terminal device 1 may transmit the uplink physical signal. The base station device 3 may receive the uplink physical signal. In the uplink of the wireless communication system according to one aspect of the present embodiment, at least 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)

[0106] UL DMRS is a general term for DMRS for PUSCH and DMRS for PUCCH.

[0107] The set of antenna ports of DMRSs for PUSCH (DMRSs related to PUSCH, DMRSs included in PUSCH, and DMRSs corresponding to PUSCH) may be determined based on the set of antenna ports for the PUSCH, that is, the set of antenna ports of DMRSs for PUSCH may be the same as the set of antenna ports for the PUSCH.

[0108] The transmission of the PUSCH and the transmission of the DMRS for the PUSCH may be indicated (or scheduled) by one DCI format. The PUSCH and the DMRS for the PUSCH may be collectively referred to as the PUSCH. Transmitting the PUSCH may be equivalent to transmitting the PUSCH and the DMRS for the PUSCH.

[0109] The PUSCH may be estimated from the DMRS for the PUSCH, that is, the propagation path of the PUSCH may be estimated from the DMRS for the PUSCH.

[0110] 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.

[0111] The transmission of a PUCCH and the transmission of a DMRS for the PUCCH may be indicated (or triggered) by one DCI format. The mapping of a PUCCH to resource elements and / or the mapping of a DMRS for the PUCCH to resource elements may be provided by one PUCCH format. The PUCCH and the DMRS for the PUCCH may be collectively referred to as the PUCCH. Transmitting a PUCCH may also mean transmitting a PUCCH and a DMRS for the PUCCH.

[0112] The PUCCH may be estimated from the DMRS for the PUCCH, that is, the propagation path of the PUCCH may be estimated from the DMRS for the PUCCH.

[0113] The downlink physical channel may correspond to a set of resource elements carrying information generated in a higher layer. The downlink physical channel may be a physical channel used in a downlink component carrier. The base station device 3 may transmit the downlink physical channel. The terminal device 1 may receive the downlink physical channel. In the downlink of the wireless communication system according to one aspect of the present embodiment, at least some or all of the following downlink physical channels may be used. ·PBCH(Physical Broadcast Channel) ·PDCCH (Physical Downlink Control Channel) ·PDSCH(Physical Downlink Shared Channel)

[0114] The PBCH may be used to transmit a Master Information Block (MIB) and / or physical layer control information. The PBCH may be transmitted to deliver, transmit, or convey the MIB and / or physical layer control information. A BCH may be mapped to the PBCH. The terminal device 1 may receive a PBCH in which the MIB and / or physical layer control information is mapped. The base station device 3 may transmit a PBCH in which the MIB and / or physical layer control information is mapped. The physical layer control information is also called a PBCH payload or a PBCH payload related to timing. The MIB may include one or more higher layer parameters.

[0115] The physical layer control information includes 8 bits. The physical layer control information may include at least some or all of the following 0A to 0D: 0A) Radio frame bit 0B) Half radio frame (half system frame, half frame) bit 0C) SS / PBCH block index bit 0D) Subcarrier offset bit

[0116] The radio frame bits are used to indicate the radio frame in which the PBCH is transmitted (the radio frame including the slot in which the PBCH is transmitted). The radio frame bits include 4 bits. The radio frame bits may be configured by 4 bits of a 10-bit radio frame indicator. For example, the radio frame indicator may be used to identify at least radio frames with index 0 to index 1023.

[0117] The half radio frame bit is used to indicate whether the PBCH is transmitted in the first five subframes or the last five subframes of a radio frame in which the PBCH is transmitted. Here, a half radio frame may be configured to include five subframes. Alternatively, a half radio frame may be configured to include the first five subframes of ten subframes included in a radio frame. Alternatively, a half radio frame may be configured to include the last five subframes of ten subframes included in a radio frame.

[0118] The SS / PBCH block index bits are used to indicate the SS / PBCH block index. The SS / PBCH block index bits include 3 bits. The SS / PBCH block index bits may be configured with 3 bits of a 6-bit SS / PBCH block index indicator. The SS / PBCH block index indicator may be used at least to identify SS / PBCH blocks from index 0 to index 63.

[0119] The subcarrier offset bit is used to indicate a subcarrier offset, which may be used to indicate the difference between the first subcarrier to which the PBCH is mapped and the first subcarrier to which the control resource set with index 0 is mapped.

[0120] The PDCCH may be used to transmit downlink control information (DCI). The PDCCH may be transmitted to deliver (transmit, convey) the downlink control information. The downlink control information may be mapped to the PDCCH. The terminal device 1 may receive the PDCCH in which the downlink control information is mapped. The base station device 3 may transmit the PDCCH in which the downlink control information is mapped.

[0121] The downlink control information may correspond to a DCI format, may be included in the DCI format, or may be arranged in each field of the DCI format.

[0122] DCI format 0_0, DCI format 0_1, DCI format 1_0, and DCI format 1_1 are DCI formats that each include a different set of fields. The uplink DCI format is a general term for DCI format 0_0 and DCI format 0_1. The downlink DCI format is a general term for DCI format 1_0 and DCI format 1_1.

[0123] DCI format 0_0 is used at least for scheduling a PUSCH of a certain cell (or configured in a certain cell). DCI format 0_0 is configured to include at least some or all of fields 1A to 1E. 1A) Identifier field for DCI formats 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)

[0124] The DCI format specification field may indicate whether the DCI format including the DCI format specification field is an uplink DCI format or a downlink DCI format. The DCI format specification field included in DCI format 0_0 may indicate 0 (or may indicate that DCI format 0_0 is an uplink DCI format).

[0125] The frequency domain resource allocation field included in DCI format 0_0 may be used at least to indicate the allocation of frequency resources for the PUSCH.

[0126] The time domain resource allocation field included in DCI format 0_0 may be used at least to indicate the allocation of time resources for the PUSCH.

[0127] The frequency hopping flag field may be used at least to indicate whether frequency hopping is applied to the PUSCH.

[0128] The MCS field included in DCI format 0_0 may be used to indicate at least a modulation scheme and / or a target coding rate for the PUSCH. The target coding rate may be a target coding rate for a transport block of the PUSCH. The transport block size (TBS) of the PUSCH may be determined based on at least a part or all of the target coding rate and the modulation scheme for the PUSCH.

[0129] DCI format 0_0 may not include a field used for a CSI request, that is, CSI may not be requested by DCI format 0_0.

[0130] DCI format 0_0 may not include a carrier indicator field, i.e., the uplink component carrier on which the PUSCH scheduled by DCI format 0_0 is arranged may be the same as the downlink component carrier on which the PDCCH including the DCI format 0_0 is arranged.

[0131] DCI format 0_0 may not include a BWP field. That is, the uplink BWP in which the PUSCH scheduled by DCI format 0_0 is arranged may be the same as the downlink BWP in which the PDCCH including the DCI format 0_0 is arranged.

[0132] DCI format 0_1 ​​is used at least for scheduling a PUSCH of a certain cell (located in a certain cell). DCI format 0_1 ​​is configured to include at least some or all of fields 2A to 2H. 2A) DCI format specific fields 2B) Frequency domain resource allocation field 2C) Uplink time domain resource allocation field 2D) Frequency hopping flag field 2E) MCS Field 2F) CSI request field 2G) BWP field 2H) Carrier indicator field

[0133] The DCI format identification field included in DCI format 0_1 ​​may indicate 0 (or may indicate that DCI format 0_1 ​​is an uplink DCI format).

[0134] The frequency domain resource allocation field included in DCI format 0_1 ​​may be used at least to indicate the allocation of frequency resources for the PUSCH.

[0135] The time domain resource allocation field included in DCI format 0_1 ​​may be used at least to indicate the allocation of time resources for the PUSCH.

[0136] The MCS field included in DCI format 0_1 ​​may be used to indicate at least part or all of the modulation scheme and / or target coding rate for the PUSCH.

[0137] When DCI format 0_1 ​​includes a BWP field, the BWP field may be used to indicate an uplink BWP in which a PUSCH is arranged. When DCI format 0_1 ​​does not include a BWP field, the uplink BWP in which a PUSCH is arranged may be the same as an uplink BWP in which a PDCCH including a DCI format 0_1 ​​used for scheduling the PUSCH is arranged. When the number of uplink BWPs configured in a terminal device 1 in a certain uplink component carrier is two or more, the number of bits of the BWP field included in DCI format 0_1 ​​used for scheduling a PUSCH arranged in the certain uplink component carrier may be one or more. When the number of uplink BWPs configured in a terminal device 1 in a certain uplink component carrier is one, the number of bits of the BWP field included in DCI format 0_1 ​​used for scheduling a PUSCH arranged in the certain uplink component carrier may be zero (or the BWP field may not be included in DCI format 0_1 ​​used for scheduling a PUSCH arranged in the certain uplink component carrier).

[0138] The CSI request field is used at least to indicate the reporting of CSI.

[0139] When DCI format 0_1 ​​includes a carrier indicator field, the carrier indicator field may be used to indicate an uplink component carrier on which a PUSCH is arranged. When DCI format 0_1 ​​does not include a carrier indicator field, the uplink component carrier on which a PUSCH is arranged may be the same as an uplink component carrier on which a PDCCH including DCI format 0_1 ​​used for scheduling the PUSCH is arranged. When the number of uplink component carriers configured in a terminal device 1 in a certain serving cell group is two or more (when uplink carrier aggregation is operated in a certain serving cell group), the number of bits of the carrier indicator field included in DCI format 0_1 ​​used for scheduling a PUSCH arranged in the certain serving cell group may be one bit or more (for example, three bits). When the number of uplink component carriers configured for a terminal device 1 in a certain serving cell group is 1 (when uplink carrier aggregation is not operated in a certain serving cell group), the number of bits in the carrier indicator field included in DCI format 0_1 ​​used for scheduling a PUSCH placed in the certain serving cell group may be 0 bits (or the carrier indicator field may not be included in DCI format 0_1 ​​used for scheduling a PUSCH placed in the certain serving cell group).

[0140] DCI format 1_0 is used at least for scheduling a PDSCH of a certain cell (located in a certain cell). DCI format 1_0 is configured to include at least some or all of 3A to 3F. 3A) DCI Format Specific Fields 3B) Frequency domain resource allocation field 3C) Time Domain Resource Allocation Field 3D) MCS field 3E) PDSCH_HARQ feedback timing indicator field 3F) PUCCH resource indicator field

[0141] The DCI format identification field included in DCI format 1_0 may indicate 1 (or may indicate that DCI format 1_0 is a downlink DCI format).

[0142] The frequency domain resource allocation field included in DCI format 1_0 may be used at least to indicate the allocation of frequency resources for the PDSCH.

[0143] The time domain resource allocation field included in DCI format 1_0 may be used at least to indicate the allocation of time resources for the PDSCH.

[0144] The MCS field included in DCI format 1_0 may be used to indicate at least a modulation scheme and / or a target coding rate for the PDSCH. The target coding rate may be a target coding rate for a transport block of the PDSCH. The size of the transport block (TBS) of the PDSCH may be determined based on at least a part or all of the target coding rate and the modulation scheme for the PDSCH.

[0145] The PDSCH_HARQ feedback timing indication field may be used at least to indicate the offset from the slot containing the last OFDM symbol of the PDSCH to the slot containing the first OFDM symbol of the PUCCH.

[0146] The PUCCH resource indication field may be a field indicating an index of one or more PUCCH resources included in a PUCCH resource set. A PUCCH resource set may include one or more PUCCH resources.

[0147] DCI format 1_0 may not include a carrier indicator field, i.e., the downlink component carrier on which the PDSCH scheduled by DCI format 1_0 is arranged may be the same as the downlink component carrier on which the PDCCH including DCI format 1_0 is arranged.

[0148] DCI format 1_0 may not include a BWP field. That is, the downlink BWP in which the PDSCH scheduled by DCI format 1_0 is arranged may be the same as the downlink BWP in which the PDCCH including DCI format 1_0 is arranged.

[0149] DCI format 1_1 is used at least for scheduling a PDSCH of a certain cell (or configured in a certain cell), and is configured to include at least some or all of 4A to 4I. 4A) DCI Format Specific Fields 4B) Frequency domain resource allocation field 4C) Time Domain Resource Allocation Field 4E) MCS Field 4F) PDSCH_HARQ feedback timing indication field 4G) PUCCH resource indication field 4H) BWP Field 4I) Career Indicator Field

[0150] The DCI format identification field included in DCI format 1_1 may indicate 1 (or may indicate that DCI format 1_1 is a downlink DCI format).

[0151] The frequency domain resource allocation field included in DCI format 1_1 may be used at least to indicate the allocation of frequency resources for the PDSCH.

[0152] The time domain resource allocation field included in DCI format 1_1 may be used at least to indicate the allocation of time resources for the PDSCH.

[0153] The MCS field included in DCI format 1_1 may be used to indicate at least part or all of the modulation scheme and / or target coding rate for the PDSCH.

[0154] If DCI format 1_1 includes a PDSCH_HARQ feedback timing indication field, the PDSCH_HARQ feedback timing indication field may be used at least to indicate an offset from the slot containing the last OFDM symbol of the PDSCH to the slot containing the first OFDM symbol of the PUCCH. If DCI format 1_1 does not include a PDSCH_HARQ feedback timing indication field, the offset from the slot containing the last OFDM symbol of the PDSCH to the slot containing the first OFDM symbol of the PUCCH may be specified by a parameter of a higher layer.

[0155] The PUCCH resource indication field may be a field indicating an index of one or more PUCCH resources included in a PUCCH resource set.

[0156] When DCI format 1_1 includes a BWP field, the BWP field may be used to indicate a downlink BWP in which a PDSCH is arranged. When DCI format 1_1 does not include a BWP field, the downlink BWP in which a PDSCH is arranged may be the same as a downlink BWP in which a PDCCH including DCI format 1_1 used for scheduling the PDSCH is arranged. When the number of downlink BWPs configured in the terminal device 1 in a certain downlink component carrier is two or more, the number of bits of the BWP field included in DCI format 1_1 used for scheduling the PDSCH arranged in the certain downlink component carrier may be one or more. When the number of downlink BWPs configured in the terminal device 1 in a certain downlink component carrier is one, the number of bits of the BWP field included in DCI format 1_1 used for scheduling the PDSCH arranged in the certain downlink component carrier may be zero (or the BWP field may not be included in DCI format 1_1 used for scheduling the PDSCH arranged in the certain downlink component carrier).

[0157] When DCI format 1_1 includes a carrier indicator field, the carrier indicator field may be used to indicate a downlink component carrier on which a PDSCH is arranged. When DCI format 1_1 does not include a carrier indicator field, the downlink component carrier on which a PDSCH is arranged may be the same as a downlink component carrier on which a PDCCH including DCI format 1_1 used for scheduling the PDSCH is arranged. When the number of downlink component carriers configured in a terminal device 1 in a certain serving cell group is two or more (when downlink carrier aggregation is operated in a certain serving cell group), the number of bits of the carrier indicator field included in DCI format 1_1 used for scheduling a PDSCH arranged in the certain serving cell group may be one bit or more (for example, three bits). When the number of downlink component carriers configured for a terminal device 1 in a certain serving cell group is 1 (when downlink carrier aggregation is not operated in a certain serving cell group), the number of bits in the carrier indicator field included in DCI format 1_1 used for scheduling the PDSCH placed in the certain serving cell group may be 0 bits (or the carrier indicator field may not be included in DCI format 1_1 used for scheduling the PDSCH placed in the certain serving cell group).

[0158] The PDSCH may be used to transmit a transport block. The PDSCH may be used to transmit a transport block corresponding to the DL-SCH. The PDSCH may be used to transmit a transport block. The PDSCH may be used to transmit a transport block corresponding to the DL-SCH. A transport block may be allocated to the PDSCH. A transport block corresponding to the DL-SCH may be allocated to the PDSCH. The base station device 3 may transmit the PDSCH. The terminal device 1 may receive the PDSCH.

[0159] The downlink physical signal may correspond to a set of resource elements. The downlink physical signal may not carry information generated in a higher layer. The downlink physical signal may be a physical signal used in a downlink component carrier. The downlink physical signal may be transmitted by a base station device 3. The downlink physical signal may be transmitted by a terminal device 1. In the downlink of a wireless communication system according to one aspect of the present embodiment, at least some or all of the following downlink physical signals may be used. ·Synchronization signal (SS) ·DL DMRS(DownLink DeModulation Reference Signal) ·CSI-RS(Channel State Information-Reference Signal) ·DL PTRS(DownLink Phase Tracking Reference Signal)

[0160] The synchronization signal may be used at least for synchronization in the frequency domain and / or the time domain of the downlink by the terminal device 1. The synchronization signal is a general term for a PSS (Primary Synchronization Signal) and an SSS (Secondary Synchronization Signal).

[0161] FIG. 7 is a diagram showing an example of the configuration of an SS / PBCH block according to one aspect of this embodiment. In FIG. 7, the horizontal axis is the time axis (OFDM symbol index l sym ), where the vertical axis represents the frequency domain. The diagonally shaded blocks represent sets of resource elements for PSS. The grid-lined blocks represent sets of resource elements for SSS. The horizontally shaded blocks represent sets of resource elements for PBCH and DMRS for the PBCH (DMRS related to the PBCH, DMRS included in the PBCH, and DMRS corresponding to the PBCH).

[0162] As shown in FIG. 7, the SS / PBCH block includes a PSS, SSS, and PBCH. The SS / PBCH block includes four consecutive OFDM symbols. The SS / PBCH block includes 240 subcarriers. The PSS is allocated to the 57th to 183rd subcarriers in the first OFDM symbol. The SSS is allocated to the 57th to 183rd subcarriers in the third OFDM symbol. The 1st to 56th subcarriers in the first OFDM symbol may be set to zero. The 184th to 240th subcarriers in the first OFDM symbol may be set to zero. The 49th to 56th subcarriers in the third OFDM symbol may be set to zero. The 184th to 192nd subcarriers in the third OFDM symbol may be set to zero. The PBCH is allocated to the 1st to 240th subcarriers in the second OFDM symbol, which are subcarriers where the DMRS for the PBCH is not allocated. The PBCH is allocated to the 1st to 48th subcarriers of the third OFDM symbol, and to subcarriers where DMRS for the PBCH is not allocated. The PBCH is allocated to the 193rd to 240th subcarriers of the third OFDM symbol, and to subcarriers where DMRS for the PBCH is not allocated. The PBCH is allocated to the 1st to 240th subcarriers of the fourth OFDM symbol, and to subcarriers where DMRS for the PBCH is not allocated.

[0163] The antenna ports for the PSS, SSS, PBCH, and DMRS for the PBCH may be the same.

[0164] The PBCH on which the PBCH symbol is transmitted at a certain antenna port may be estimated by the DMRS for the PBCH that is placed in the slot to which the PBCH is mapped and is included in the SS / PBCH block to which the PBCH belongs.

[0165] DL DMRS is a general term for DMRS for PBCH, DMRS for PDSCH, and DMRS for PDCCH.

[0166] The set of antenna ports for DMRSs for a PDSCH (DMRSs associated with a PDSCH, DMRSs included in a PDSCH, and DMRSs corresponding to a PDSCH) may be determined based on the set of antenna ports for the PDSCH, i.e., the set of antenna ports for DMRSs for a PDSCH may be the same as the set of antenna ports for the PDSCH.

[0167] The transmission of the PDSCH and the transmission of the DMRS for the PDSCH may be indicated (or scheduled) by one DCI format. The PDSCH and the DMRS for the PDSCH may be collectively referred to as the PDSCH. Transmitting the PDSCH may also mean transmitting the PDSCH and the DMRS for the PDSCH.

[0168] A PDSCH may be estimated from a DMRS for the PDSCH. That is, a propagation path of a PDSCH may be estimated from the DMRS for the PDSCH. If a set of resource elements carrying a certain PDSCH symbol and a set of resource elements carrying a DMRS for the certain PDSCH symbol are included in the same precoding resource group (PRG), the PDSCH carrying the PDSCH symbol for a certain antenna port may be estimated by the DMRS for the PDSCH.

[0169] The antenna port of the DMRS for the PDCCH (DMRS related to the PDCCH, DMRS included in the PDCCH, DMRS corresponding to the PDCCH) may be the same as the antenna port for the PDCCH.

[0170] A PDCCH may be estimated from a DMRS for the PDCCH. That is, a propagation path of a PDCCH may be estimated from a DMRS for the PDCCH. If the same precoder is applied (or assumed to be applied) to a set of resource elements on which a certain PDCCH symbol is transmitted and a set of resource elements on which a DMRS symbol for the PDCCH is transmitted, the PDCCH on which a certain antenna port transmits a PDCCH symbol may be estimated by the DMRS for the PDCCH.

[0171] The BCH (Broadcast CHannel), UL-SCH (Uplink-Shared CHannel), and DL-SCH (Downlink-Shared CHannel) are transport channels. Channels used in the MAC layer are called transport channels. The unit of transport channels used in the MAC layer is also called a transport block (TB) or MAC PDU (Protocol Data Unit). In the MAC layer, HARQ (Hybrid Automatic Repeat reQuest) control is performed for each transport block. A transport block is a unit of data that the MAC layer delivers to the physical layer. In the physical layer, a transport block is mapped to a codeword, and modulation processing is performed for each codeword.

[0172] One UL-SCH and one DL-SCH may be provided for each serving cell. The BCH may be provided for the PCell. The BCH does not necessarily have to be provided for the PSCell or SCell.

[0173] The BCCH (Broadcast Control CHannel), CCCH (Common Control CHannel), and DCCH (Dedicated Control CHannel) are logical channels. For example, the BCCH is a channel of the RRC layer used for transmitting MIB or system information. The CCCH (Common Control CHannel) may be used for transmitting an RRC message common to a plurality of terminal devices 1. Here, the CCCH may be used, for example, for a terminal device 1 that is not RRC connected. The DCCH (Dedicated Control CHannel) may be used at least for transmitting an RRC message dedicated to the terminal device 1. Here, the DCCH may be used, for example, for a terminal device 1 that is RRC connected.

[0174] An RRC message includes one or more RRC parameters (information elements). For example, an RRC message may include an MIB. An RRC message may also include system information. An RRC message may also include a message corresponding to a CCCH. An RRC message including a message corresponding to a DCCH is also called a dedicated RRC message.

[0175] The BCCH in the logical channel may be mapped to the BCH or DL-SCH in the transport channel, the CCCH in the logical channel may be mapped to the DL-SCH or UL-SCH in the transport channel, and the DCCH in the logical channel may be mapped to the DL-SCH or UL-SCH in the transport channel.

[0176] The UL-SCH in the transport channel may be mapped to the PUSCH in the physical channel, the DL-SCH in the transport channel may be mapped to the PDSCH in the physical channel, and the BCH in the transport channel may be mapped to the PBCH in the physical channel.

[0177] The upper layer parameters (upper layer parameters) are parameters included in an RRC message or a MAC CE (Medium Access Control Control Element). That is, the upper layer parameters are a collective term for the parameters included in the MIB, system information, a message corresponding to the CCCH, a message corresponding to the DCCH, and the MAC CE. The parameters included in the MAC CE are transmitted by a MAC CE (Control Element) command.

[0178] The procedure performed by the terminal device 1 includes at least some or all of the following steps 5A to 5C. 5A) Cell Search 5B) Random Access 5C) Data communication

[0179] The cell search is a procedure used by the terminal device 1 to synchronize with a certain cell in the time domain and the frequency domain and detect a physical cell identity. That is, the terminal device 1 may perform the cell search to synchronize with a certain cell in the time domain and the frequency domain and detect a physical cell ID.

[0180] The sequence of PSSs is based at least on a physical cell ID. The sequence of SSSs is based at least on a physical cell ID.

[0181] The SS / PBCH block candidates indicate resources on which transmission of the SS / PBCH block is permitted (possibly, reserved, configured, defined, possible).

[0182] The set of SS / PBCH block candidates in a half radio frame is also called the SS burst set. The SS burst set is also called the transmission window, SS transmission window, or DRS (Discovery Reference Signal) transmission window. The SS burst set is a general term that includes at least the first SS burst set and the second SS burst set.

[0183] The base station device 3 transmits SS / PBCH blocks of one or more indexes at a predetermined period. The terminal device 1 may detect at least one of the SS / PBCH blocks of the one or more indexes and attempt to decode the PBCH included in the SS / PBCH block.

[0184] Random access is a procedure that includes at least some or all of message 1, message 2, message 3, and message 4.

[0185] Message 1 is a procedure for transmitting a PRACH by a terminal device 1. The terminal device 1 transmits a PRACH in one PRACH opportunity selected from one or more PRACH opportunities based at least on an index of an SS / PBCH block candidate detected based on a cell search. Each PRACH opportunity is defined based at least on resources in the time domain and the frequency domain.

[0186] The terminal device 1 transmits one random access preamble selected from among the PRACH opportunities corresponding to the index of the SS / PBCH block candidate from which the SS / PBCH block is detected.

[0187] Message 2 is a procedure in which the terminal device 1 attempts to detect DCI format 1_0 with a CRC (Cyclic Redundancy Check) scrambled with an RA-RNTI (Random Access - Radio Network Temporary Identifier). The terminal device 1 attempts to detect a PDCCH including this DCI format in a control resource set given based on an MIB included in a PBCH included in an SS / PBCH block detected based on a cell search and in resources indicated based on the setting of a search space set. Message 2 is also referred to as a random access response.

[0188] Message 3 is a procedure for transmitting a PUSCH scheduled by a random access response grant included in DCI format 1_0 detected by the procedure for message 2. Here, the random access response grant is indicated by a MAC CE included in a PDSCH scheduled by DCI format 1_0.

[0189] The PUSCH scheduled based on the random access response grant is either a message 3 PUSCH or a PUSCH. The message 3 PUSCH includes a contention resolution identifier (MAC CE). The contention resolution identifier (MAC CE) includes the contention resolution ID.

[0190] Message 3 PUSCH retransmissions are scheduled with DCI format 0_0 with CRC scrambled based on TC-RNTI (Temporary Cell - Radio Network Temporary Identifier).

[0191] Message 4 is a procedure for attempting to detect DCI format 1_0 with a CRC scrambled based on either a C-RNTI (Cell-Radio Network Temporary Identifier) ​​or a TC-RNTI. The terminal device 1 receives a PDSCH scheduled based on the DCI format 1_0. The PDSCH may include a collision resolution ID.

[0192] Data communication is a general term for downlink communication and uplink communication.

[0193] In data communication, the terminal device 1 attempts to detect the PDCCH in resources specified based on the control resource set and the search space set (monitors the PDCCH).

[0194] A control resource set is a set of resources consisting of a predetermined number of resource blocks and a predetermined number of OFDM symbols. In the frequency domain, a control resource set may be composed of contiguous resources (non-interleaved mapping) or distributed resources (interleaver mapping).

[0195] A set of resource blocks constituting the control resource set may be indicated by a higher layer parameter, and the number of OFDM symbols constituting the control resource set may be indicated by a higher layer parameter.

[0196] The terminal device 1 attempts to detect a PDCCH in a search space set. Here, attempting to detect a PDCCH in a search space set may be attempting to detect a PDCCH candidate in the search space set, may be attempting to detect a DCI format in the search space set, may be attempting to detect a PDCCH in a control resource set, may be attempting to detect a PDCCH candidate in the control resource set, or may be attempting to detect a DCI format in the control resource set.

[0197] The search space set is defined as a set of PDCCH candidates. The search space set may be a Common Search Space (CSS) set or a UE-specific Search Space (USS) set. The terminal device 1 attempts to detect PDCCH candidates in some or all of a Type 0 PDCCH common search space set, a Type 0a PDCCH common search space set, a Type 1 PDCCH common search space set, a Type 2 PDCCH common search space set, a Type 3 PDCCH common search space set, and / or a UE-specific search space set.

[0198] The Type 0 PDCCH common search space set may be used as the common search space set with index 0. The Type 0 PDCCH common search space set may be the common search space set with index 0.

[0199] The CSS set is a collective term for a Type 0 PDCCH common search space set, a Type 0a PDCCH common search space set, a Type 1 PDCCH common search space set, a Type 2 PDCCH common search space set, and a Type 3 PDCCH common search space set. The USS set is also called a UE-specific PDCCH search space set.

[0200] A search space set is associated with (contained in, corresponds to) a control resource set. The index of the control resource set associated with the search space set may be indicated by a higher layer parameter.

[0201] For a given search area set, some or all of 6A to 6C may be indicated by at least higher layer parameters. 6A) PDCCH monitoring periodicity 6B) PDCCH monitoring pattern within a slot 6C) PDCCH monitoring offset

[0202] A monitoring occasion for a search space set may correspond to an OFDM symbol in which a first OFDM symbol of a control resource set associated with the search space set is located. A monitoring occasion for a search space set may correspond to resources of a control resource set starting from a first OFDM symbol of the control resource set associated with the search space set. The monitoring occasion for the search space set is determined based on at least some or all of a PDCCH monitoring interval, a PDCCH monitoring pattern within a slot, and a PDCCH monitoring offset.

[0203] 8 is a diagram illustrating an example of a monitoring opportunity for a search area set according to one aspect of the present embodiment. In FIG. 8, search area set 91 and search area set 92 are set in primary cell 301, search area set 93 is set in secondary cell 302, and search area set 94 is set in secondary cell 303.

[0204] In Figure 8, blocks indicated by grid lines represent search area set 91, blocks indicated by diagonal lines rising to the right represent search area set 92, blocks indicated by diagonal lines rising to the left represent search area set 93, and blocks indicated by horizontal lines represent search area set 94.

[0205] The monitoring interval of search area set 91 is set to 1 slot, the monitoring offset of search area set 91 is set to 0 slot, and the monitoring pattern of search area set 91 is set to [1,0,0,0,0,0,0,1,0,0,0,0,0,0]. That is, the monitoring opportunities for search area set 91 correspond to the first OFDM symbol (OFDM symbol #0) and the eighth OFDM symbol (OFDM symbol #7) in each slot.

[0206] The monitoring interval of search area set 92 is set to 2 slots, the monitoring offset of search area set 92 is set to 0 slots, and the monitoring pattern of search area set 92 is set to [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0]. That is, the monitoring opportunity for search area set 92 corresponds to the first OFDM symbol (OFDM symbol #0) in each of the even slots.

[0207] The monitoring interval of search area set 93 is set to 2 slots, the monitoring offset of search area set 93 is set to 0 slots, and the monitoring pattern of search area set 93 is set to [0,0,0,0,0,0,0,1,0,0,0,0,0,0], i.e., the monitoring opportunity for search area set 93 corresponds to the 8th OFDM symbol (OFDM symbol #7) in each of the even slots.

[0208] The monitoring interval of search area set 94 is set to 2 slots, the monitoring offset of search area set 94 is set to 1 slot, and the monitoring pattern of search area set 94 is set to [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0]. That is, the monitoring opportunity for search area set 94 corresponds to the first OFDM symbol (OFDM symbol #0) in each odd slot.

[0209] The Type 0 PDCCH common search space set may be used at least for DCI formats with a Cyclic Redundancy Check (CRC) sequence scrambled by a System Information-Radio Network Temporary Identifier (SI-RNTI).

[0210] The Type 0aPDCCH common search space set may be used at least for DCI formats with a CRC (Cyclic Redundancy Check) sequence scrambled by a System Information-Radio Network Temporary Identifier (SI-RNTI).

[0211] The Type 1 PDCCH common search space set may be used at least for DCI formats with a CRC sequence scrambled by a Random Access-Radio Network Temporary Identifier (RA-RNTI) and / or a CRC sequence scrambled by a Temporary Cell-Radio Network Temporary Identifier (TC-RNTI).

[0212] A Type 2 PDCCH common search space set may be used for a DCI format with a CRC sequence scrambled by a Paging-Radio Network Temporary Identifier (P-RNTI).

[0213] The Type 3 PDCCH common search space set may be used for a DCI format with a CRC sequence scrambled by a Cell-Radio Network Temporary Identifier (C-RNTI).

[0214] The UE dedicated PDCCH search space set may be used at least for DCI formats with CRC sequences scrambled by the C-RNTI.

[0215] In downlink communication, the terminal device 1 detects a downlink DCI format. The detected downlink DCI format is used at least for PDSCH resource allocation. The detected downlink DCI format is also referred to as a downlink assignment. The terminal device 1 attempts to receive the PDSCH. Based on the PUCCH resource indicated based on the detected downlink DCI format, the terminal device 1 reports a HARQ-ACK corresponding to the PDSCH (a HARQ-ACK corresponding to a transport block included in the PDSCH) to the base station device 3.

[0216] In uplink communication, the terminal device 1 detects an uplink DCI format. The detected DCI format is used at least for PUSCH resource allocation. The detected uplink DCI format is also called an uplink grant. The terminal device 1 transmits the PUSCH.

[0217] In configured scheduling (configured grant), an uplink grant for scheduling a PUSCH is configured for each transmission period of the PUSCH. When a PUSCH is scheduled by an uplink DCI format, some or all of the information indicated by the uplink DCI format may be indicated by the uplink grant configured in the case of configured scheduling.

[0218] The uplink grant is managed by the medium access control layer processing unit 15. For example, the uplink grant may be delivered to any of the N HARQ processes. For example, the entity that delivers the uplink grant to any of the N HARQ processes may be an HARQ entity included in the medium access control layer processing unit 15.

[0219] 9 is a diagram showing an example of the configuration of the media access control layer processing unit 15 according to one aspect of this embodiment. In FIG. 9, the media access control layer processing unit 15 includes an HARQ entity 9000. The HARQ entity 9000 includes N HARQ processes. For example, N may be 8 or 16.

[0220] The media access control layer processing unit 15 may receive the uplink grant through the PDCCH. For example, the PDCCH may be processed in the physical layer processing unit 10.

[0221] When the media access control layer processor 15 receives an uplink grant via the PDCCH, the physical layer processor 10 may deliver HARQ information corresponding to the uplink grant to the media access control layer processor 15. Here, the HARQ information may include at least some or all of an HARQ process number corresponding to the uplink grant, a new data indicator (NDI) corresponding to the uplink grant, and a redundancy version (RV) corresponding to the uplink grant. Here, the HARQ process number corresponding to the uplink grant may be provided by a field included in a DCI format included in the PDCCH. Also, the new data indicator corresponding to the uplink grant may be provided by a field included in a DCI format included in the PDCCH. Also, the RV corresponding to the uplink grant may be provided by a field included in a DCI format included in the PDCCH.

[0222] The HARQ entity 9000 may determine, based on a new data indicator corresponding to an uplink grant, whether a transmission instruction to the physical layer processing unit 10 based on the uplink grant corresponds to a retransmission. For example, if a transmission instruction to the physical layer processing unit 10 based on the uplink grant does not correspond to a retransmission, the transmission instruction may correspond to an initial transmission. For example, the HARQ entity 9000 may determine, based on a new data indicator corresponding to an uplink grant, whether to acquire a MAC PDU for the uplink grant. For example, if the value of the new data indicator corresponding to the uplink grant has changed to the value of the NDI for the transport block stored in the HARQ process corresponding to the uplink grant, the HARQ entity 9000 may acquire a MAC PDU. On the other hand, if the value of the new data indicator corresponding to the uplink grant has not changed to the value of the NDI for the transport block stored in the HARQ process corresponding to the uplink grant, the HARQ entity 9000 may not acquire a MAC PDU.

[0223] The HARQ entity 9000 may deliver the uplink grant and the HARQ information corresponding to the uplink grant to an HARQ process having an HARQ process number corresponding to the uplink grant. Furthermore, if the uplink grant does not support retransmission, the HARQ entity 9000 may deliver the obtained MAC PDU to an HARQ process having an HARQ process number corresponding to the uplink grant.

[0224] The HARQ process may issue a transmission instruction to the physical layer processing unit 10 based on the received uplink grant and HARQ information. Furthermore, when the HARQ process receives a MAC PDU from the HARQ entity 9000, the HARQ process may store the MAC PDU in the HARQ buffer.

[0225] The physical layer processing unit 10 may perform a transport block encoding procedure based on a transmission instruction from the HARQ process. Here, the transport block is a MAC PDU delivered from the HARQ process. The transport block encoding procedure may be performed by an encoding unit 12000 included in the physical layer processing unit 10.

[0226] Fig. 10 is a diagram showing an example of the configuration of an encoding processor unit 12000 according to one aspect of this embodiment. In Fig. 10, the encoding processor 12000 includes at least a CRC addition unit 12001, a code lock segmentation unit 12002, an encoding unit 12003, a rate-matching unit 12004, and some or all of a multiplexing unit 12005.

[0227] The transport block is input to CRC adding section 12001. In CRC adding section 12001, a CRC sequence may be added to the transport block. A bit sequence including the CRC and the transport block may be input to code block dividing section 12002. If a CRC sequence is not added to the transport block, the bit sequence including the transport block may be input to code block dividing section 12002.

[0228] The code block division unit 12002 may determine whether to divide the input bit sequence into multiple code blocks. For example, the code block division unit 12002 may determine whether to divide the input bit sequence into multiple code blocks by comparing the size of the input bit sequence with the maximum code block size. If the input bit sequence is divided into multiple code blocks, one CRC sequence may be added to each of the multiple code blocks. Hereinafter, a code block to which one CRC sequence is added will also be referred to as a code block. If the input bit sequence is not divided into multiple code blocks, the input bit sequence is considered to be one code block. One or more code blocks are input to the encoding unit 12003.

[0229] The encoding unit 12003 may apply error correction coding to the code block r. For example, the error correction coding method may be a Quasi-Cyclic Low Density Parity Check (QC-LDPC) code. Here, the index r of the code block may be any integer value between 0 and C-1, where C indicates the number of one or more code blocks. By applying error correction coding to the code block r, an encoded bit sequence d for the code block r is obtained. r The generated coded bit sequence d r is input to the rate matching unit 12004.

[0230] The rate matching unit 12004 may perform a bit selection procedure. In the bit selection procedure, the coded bit sequence d r is size N cb are input into the circular buffer.

[0231] 11 is a diagram showing an example of a bit selection procedure according to one aspect of this embodiment. In FIG. 11, the bit selection procedure includes eight steps. In step 1 of the bit selection procedure, the values ​​of two variables k and j are set to 0. Next, in step 1, the value of variable k is set to 0 when the rate matching output sequence length E r It is determined whether the value of the variable k is smaller than the rate matching output sequence length E r If it is smaller, the bit selection procedure proceeds to step 2. If the value of variable k is smaller than the rate matching output sequence length E r If not, the bit selection procedure is completed.

[0232] Rate matching output sequence length E r denotes the number of bits available for transmitting code block r. For example, the rate matching output sequence length E r is the modulation order Q of PUSCH m , the number of PUSCH layers L v , the number of code blocks C, and the value G. For example, the rate matching output sequence length E r is E r =N v Q m floor(G / (N v Q m C)) or E r =N v Q m ceil(G / (N v Q m C)) may be determined by either

[0233] Here, the value G indicates the number of bits included in a PUSCH instance (also called a PUSCH transmission occasion) available for UL-SCH transmission, and indicates the number of bits available for UL-SCH transmission for a transport block.

[0234] In step 2, d r (mod(k0+j,N cb )) value is <null>It is determined whether or not it is set to d. r (mod(k0+j,N cb )) value is <null>If d is not set, the bit selection procedure proceeds to step 3. r (mod(k0+j,N cb )) value is <null>If d is set, the bit selection procedure proceeds to step 6. r (k) is d r indicates the k-th element of

[0235] In step 3, e(k) is assigned to d r (mod(k0+j,N cb )) is input. Here, e is the rate matching output sequence. Also, e(k) indicates the k-th element of the rate matching output sequence e. The sequence length of the rate matching output sequence e is E r is.

[0236] k0 indicates the starting position of the circular buffer. In other words, in step 3, d r (mod(k0+j,N cb )) is read from the circular buffer.

[0237] In step 4, the value of k is incremented.

[0238] Step 5 represents the termination point for step 2.

[0239] In step 6, the value of j is incremented.

[0240] Step 7 represents the termination point for step 1.

[0241] 12 is a diagram illustrating the concept of a circular buffer according to one aspect of this embodiment. r are written clockwise starting from the position indicated by RV0. r Since RV is a sequence that combines a systematic bit sequence and a parity bit sequence, the systematic bits are written clockwise from RV0 (the area indicated by the black frame in the figure), and the parity bit sequence is written from the end of the systematic bit sequence (the area indicated by the white frame in the figure).

[0242] In the bit selection procedure, the bits written to the circular buffer are arranged in a sequence from the starting position k0 to E r Only the number of bits may be read. r The bits are input to a rate matching output sequence e, where the starting position k0 may be determined based on the value of the RV indicated by the DCI format used for scheduling the PUSCH.

[0243] An interleaver may be applied to the rate matching output sequence generated in the bit selection procedure. Furthermore, if multiple code blocks are generated, the rate matching output sequences for the respective code blocks may be combined to generate a single sequence g. Furthermore, if multiple code blocks are not generated, a single rate matching output sequence may be considered as a single sequence g. A single sequence g may be input to multiplexing section 12005.

[0244] In the multiplexing unit 12005, one sequence g and control data (for example, HARQ-ACK, CSI, etc.) may be multiplexed. For example, the multiplexing unit 12005 may generate an array Q. Each element of the array Q has an index k' associated with a subcarrier. sc , an index l' associated with an OFDM symbol, and an index m' based on the modulation order and the number of layers, where k' is an index associated with a subcarrier. sc may be an index relating to a subcarrier to which an instance of PUSCH is allocated. Also, the index l' relating to an OFDM symbol may be an index m' relating to an OFDM symbol to which an instance of PUSCH is allocated. Also, the index based on the modulation order and the number of layers may be an index ranging from 0 to Q m N v It can take values ​​up to -1. Here, each element of the array is Q(k' sc ,l',m') that is, the index k' in the array Q sc =k x , index l'=l x , and index m'=m x The elements of Q(k x ,l x ,m x ) is called.

[0245] In the multiplexing unit 12005, when the coded bit sequence q of the HARQ-ACK is arranged in the array Q, the multiplexing unit 12005 arranges the coded bit sequence q of the HARQ-ACK in the array Q. start The starting position l may be specified. start Once is specified, the coded bit sequence q is expressed as Q(k' sc ,l start , m'), where the coded bit sequence q is arranged in ascending order with respect to index m', and then in ascending order with respect to index k'. sc It may be arranged in the direction of l=l start When the arrangement of the coded bit sequence q is completed in the elements of the array of l=l start You can also move to the +1 array element.

[0246] For the coded bit sequence q of the HARQ-ACK bit, l start may indicate the OFDM symbol next to the OFDM symbol containing the DMRS allocated to the PUSCH instance. For example, if the first DMRS is allocated to the second OFDM symbol in the PUSCH instance, l start = 2, where the index l' starts from 0.

[0247] For one sequence g, the starting position l start may be 0 regardless of DMRS allocation.

[0248] The multiplexer 12005 reads a sequence from the array Q and generates a sequence b. The sequence b is subjected to various baseband processing and used to generate a time-domain signal. Here, the various baseband processing includes at least some or all of scrambling, modulation, layer mapping, resource element mapping, and time-domain signal generation.

[0249] When transmitting the PUSCH in multiple slots, repeated transmission of the PUSCH can be used, in which one instance of the PUSCH is generated for each slot and transmitted in multiple slots.

[0250] The repeated transmission of the PUSCH may be triggered by, for example, the PDCCH. For example, the medium access control layer processing unit 15 may obtain one uplink grant from the PDCCH. Here, in the repeated transmission of the PUSCH, the HARQ entity may generate N uplink grants from the one uplink grant. Here, N is the number of repetitions required for the repeated transmission of the PUSCH. For example, the number of repetitions N may be provided by the RRC layer. Furthermore, R may be indicated by the PDCCH that provides the uplink grant that triggers the repeated transmission of the PUSCH.

[0251] In the repeated transmission of the PUSCH, the HARQ entity may deliver N uplink grants to one HARQ process, where the one HARQ process may be determined according to HARQ information associated with the N uplink grants.

[0252] In the repeated transmission of the PUSCH, the HARQ process may issue N transmission instructions to the physical layer processing unit 10 based on N uplink grants.

[0253] In the repeated transmission of the PUSCH, the physical layer processing unit 10 may generate and transmit N instances of the PUSCH based on N transmission instructions. Here, it may be determined for each PUSCH instance whether a collision with another uplink channel occurs. If a certain PUSCH instance collides with an uplink channel with a higher priority, the transmission of the certain PUSCH instance may be omitted. Here, omitting the transmission of a PUSCH instance may mean that the transmission is dropped or not performed.

[0254] It may also be determined whether at least some of the OFDM symbols in the set of OFDM symbols on which a PUSCH instance is transmitted belong to the downlink region. If at least some of the OFDM symbols in the set of OFDM symbols on which a PUSCH instance is transmitted belong to the downlink region, transmission of the PUSCH instance may be omitted.

[0255] The multi-slot transmission of the PUSCH may be a transmission method that generates an instance of the PUSCH that is made up of multiple slots. The multi-slot transmission of the PUSCH is performed by the physical layer processing unit 10.

[0256] 13 is a diagram illustrating an example of multi-slot transmission of a PUSCH according to one aspect of the present embodiment. In FIG. 13, the horizontal axis is the time axis, and each grid on the time axis is a slot boundary. Slot indices are set in ascending order to the right, with the first slot in the diagram being slot #n.

[0257] In the multi-slot transmission shown in FIG. 13, the number of repetitions N of the PUSCH is set to 8, and 8 slots of time resources are used in the multi-slot transmission. Meanwhile, each of the PUSCH instances 13001, 13002, and 13003 is configured with multiple slots of time resources. That is, in the multi-slot transmission of the PUSCH, the format of the PUSCH instance and the number of PUSCH instances N instance may be determined based at least on the number of repetitions N and an extrinsic parameter, where the extrinsic parameter may be provided by the RRC layer or by a PDCCH providing an uplink grant indicating multi-slot transmission.

[0258] The physical layer processing unit 10 has a number N instance may be reported to the media access control layer processing unit 15.

[0259] For example, the external parameters are the number of repetitions N that constitute the PUSCH instance. unit For example, the number of PUSCH instances N instance is ceil(N / N unit ) may be determined by N instance - Each of the 1 PUSCH instances is N unit It is composed of repetitions, and one PUSCH instance is mod(N,N unit ) repetitions.

[0260] Here, the number of repetitions that constitute the PUSCH instance is N unit may be indicated by a parameter provided by the RRC layer. unit may be provided by the PDCCH.

[0261] The HARQ entity 9000 is a number N determined by the physical layer processing unit 10. instance For example, the HARQ entity 9000 may issue an uplink grant based on N instance The HARQ process may issue N uplink grants. instance A transmission instruction may be issued to the physical layer processing unit 10 based on this uplink grant.

[0262] The physical layer processing unit 10 may generate one PUSCH instance for each transmission instruction of an HARQ process.

[0263] FIG. 14 is a diagram illustrating an example of multi-slot transmission of a PUSCH according to one aspect of the present embodiment. In FIG. 14, the horizontal axis is the time axis, and each grid on the time axis is a slot boundary. Slot indices are set in ascending order from right to left, with the first slot in the diagram being slot #n. Each of 14001 to 14008 indicates a time resource set for multi-slot transmission of a PUSCH. In FIG. 14, the number of repetitions is set to N=8, and time resources are set for slot #n to slot #n+7, respectively. In the example illustrated in FIG. 14, a PUSCH instance for multi-slot transmission may be determined based on the number of repetitions N and the TDD pattern setting. Here, in FIG. 14, time resources corresponding to black boxes indicate the downlink region, and time resources corresponding to white boxes indicate the uplink region. In the example illustrated in FIG. 14, a PUSCH instance may be configured by consecutive time resources corresponding to the uplink region among resources corresponding to N repetitions. In the example of FIG. 14, 14011 and 14012 each indicate an instance of a PUSCH.

[0264] For example, the external parameter may be a TDD pattern setting. One PUSCH instance may be configured by a set of time resources corresponding to one temporally continuous uplink region among time resources corresponding to N repetitions. That is, one PUSCH instance may be configured not to include time resources corresponding to a downlink region. Here, the uplink region may or may not include a flexible region. Furthermore, the uplink region may or may not include a flexible region.

[0265] For example, the external parameter may be a parameter indicating whether multi-slot transmission is applied. For example, if the external parameter indicates the application of multi-slot transmission, time resources corresponding to N repetitions are aggregated to generate one PUSCH instance, and the number of PUSCH instances N instance may be 1. Also, if the external parameters do not indicate the application of multi-slot transmission, N PUSCH instances may be generated and the number of PUSCH repetitions N may be reported to the medium access control layer processing unit 15.

[0266] For example, if the external parameters indicate the application of multi-slot transmission, the number of PUSCH instances is determined by the number of repetitions N unit In addition, when the external parameters indicate the application of multi-slot transmission, the configuration of the PUSCH instance may be determined based on N unit It may be determined based on:

[0267] For example, when the external parameters indicate the application of multi-slot transmission, the configuration of PUSCH instances may be determined based on the setting of the TDD pattern. Also, when the external parameters indicate the application of multi-slot transmission, the number of PUSCH instances may be determined based on the setting of the TDD pattern.

[0268] For example, the parameter indicating whether multi-slot transmission is applied may be provided by a parameter of the RRC layer, or may be provided by a DCI format used for scheduling the PUSCH.

[0269] For example, a parameter indicating whether multi-slot transmission is applied may be provided by a TDRA field included in a DCI format used for scheduling the PUSCH. For example, each row of a table corresponding to the TDRA field may indicate a time resource of the PUSCH and the parameter.

[0270] By using the external parameters, the media access control layer processing unit 15 can appropriately issue a transmission instruction to the physical layer processing unit 10.

[0271] In multi-slot transmission of PUSCH, a procedure regarding collision with PUCCH may be performed for each PUSCH instance. For example, when a PUSCH instance collides with a PUCCH, UCI that was scheduled to be transmitted on the PUCCH may be multiplexed onto the PUSCH instance.

[0272] For example, when a certain PUSCH instance collides with a PUCCH in which HARQ-ACK transmission is scheduled, the coded bit sequence q of the HARQ-ACK may be multiplexed onto the certain PUSCH instance. Here, the multiplexing unit 12005 may multiplex one sequence g that was scheduled to be transmitted in the certain PUSCH instance with the coded bit sequence q. Here, the coded bit sequence q is multiplexed from a start position l based on the OFDM symbol next to the OFDM symbol containing the first DMRS of the certain instance. start may be specified.

[0273] For example, the starting position start For example, if an instance of a PUSCH is arranged in slots #n, #n+1, and #n+2, and the PUCCH is arranged in slot #n+2, the start position l start In order to identify the starting position l, the OFDM symbol including the DMRS at the beginning of slot #n+2 may be identified. start may be determined based on the OFDM symbol next to the OFDM symbol containing the first DMRS.

[0274] Various aspects of the device according to one aspect of this embodiment will be described below.

[0275] (1) In order to achieve the above object, the aspects of the present invention employ the following means: That is, a first aspect of the present invention is a terminal device that communicates with a base station device, the terminal device comprising a physical layer processing unit and a medium access control layer processing unit, the physical layer processing unit delivering HARQ information included in a received PDCCH to the medium access control layer processing unit, and the physical layer processing unit determining the number N of PUSCH instances based on the number N of PUSCH repetitions and external parameters provided from the base station device. instance The determined number is delivered to the media access control layer processing unit, the media access control layer processing unit obtains one uplink grant from the PDCCH, the media access control layer processing unit further includes an HARQ entity and an HARQ process, and the HARQ entity determines N based on the one uplink grant. instance The HARQ process generates uplink grants for the N instance Based on the uplink grants, N instance The physical layer processing unit issues a transmission instruction for one transmission.

[0276] (2) A second aspect of the present invention is a base station apparatus, comprising: a physical layer processing unit and a medium access control layer processing unit; the physical layer processing unit transmits HARQ information on a PDCCH; and the physical layer processing unit determines the number of PUSCH instances N based on the number of PUSCH repetitions N and an external parameter. instance Determine N instance Attempts to receive the PUSCH based on the uplink grant.

[0277] The programs running on the base station device 3 and terminal device 1 according to one aspect of the present invention may be programs (programs that cause a computer to function) that control a CPU (Central Processing Unit) or the like so as to realize the functions of the above-described embodiment according to one aspect of the present invention. Information handled by these devices is temporarily stored in RAM (Random Access Memory) during processing, and then stored in various ROMs such as Flash ROM (Read Only Memory) or HDD (Hard Disk Drive), and is read, modified, and written by the CPU as needed.

[0278] Note that the terminal device 1 and part of the base station device 3 in the above-described embodiment may be realized by a computer. In this case, a program for realizing this control function may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be read into a computer system and executed to realize the function.

[0279] The term "computer system" used here refers to a computer system built into the terminal device 1 or base station device 3, and includes hardware such as an OS and peripheral devices. Also, the term "computer-readable recording medium" refers to portable media such as flexible disks, optical magnetic disks, ROMs, and CD-ROMs, as well as storage devices such as hard disks built into the computer system.

[0280] Furthermore, the term "computer-readable recording medium" may include a medium that dynamically stores a program for a short period of time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, or a medium that stores a program for a fixed period of time, such as volatile memory within a computer system that serves as a server or client in such a case. The program may also be one that realizes part of the above-mentioned functions, or one that can realize the above-mentioned functions in combination with a program already stored in the computer system.

[0281] Furthermore, the base station device 3 in the above-described embodiment can also be realized as a collection (device group) consisting of multiple devices. Each of the devices constituting the device group may have some or all of the functions or functional blocks of the base station device 3 according to the above-described embodiment. It is sufficient for the device group to have all of the functions or functional blocks of the base station device 3. Furthermore, the terminal device 1 according to the above-described embodiment can also communicate with the base station device as a collection.

[0282] Furthermore, the base station device 3 in the above-described embodiments may be an EUTRAN (Evolved Universal Terrestrial Radio Access Network) and / or an NG-RAN (NextGen RAN, NR RAN). Furthermore, the base station device 3 in the above-described embodiments may have some or all of the functions of an upper node for an eNodeB and / or a gNB.

[0283] Furthermore, some or all of the terminal device 1 and base station device 3 in the above-described embodiments may be realized as an LSI, which is typically an integrated circuit, or as a chipset. Each functional block of the terminal device 1 and base station device 3 may be individually formed into a chip, or some or all of them may be integrated into a chip. Furthermore, the integrated circuit method is not limited to LSI, and may be realized using a dedicated circuit or a general-purpose processor. Furthermore, if an integrated circuit technology that can replace LSI emerges due to advances in semiconductor technology, it is also possible to use an integrated circuit based on that technology.

[0284] Furthermore, in the above-described embodiment, a terminal device is described as an example of a communication device, but the present invention is not limited to this and can also be applied to terminal devices or communication devices such as stationary or non-movable electronic devices installed indoors or outdoors, for example, AV equipment, kitchen equipment, cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other household appliances.

[0285] Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design modifications and the like are also included within the scope of the gist of the present invention. Furthermore, various modifications of one aspect of the present invention are possible within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. Furthermore, configurations in which elements described in the above embodiments are substituted with elements that achieve the same effect are also included. [Industrial Applicability]

[0286] One aspect of the present invention can be used in, for example, a communication system, a communication device (for example, a mobile phone device, a base station device, a wireless LAN device, or a sensor device), an integrated circuit (for example, a communication chip), or a program. [Explanation of symbols]

[0287] 1(1A, 1B, 1C) Terminal equipment 3 Base station equipment 10, 30 Radio transmitter / receiver 10a, 30a Radio transmitter 10b, 30b Wireless receiver 11, 31 Antenna section 12, 32 RF section 13, 33 Baseband section 14, 34 Upper layer processing unit 15, 35 Medium access control layer processing unit 16, 36 Radio resource control layer processing unit 91, 92, 93, 94 Search area set 300 Component Carriers 301 Primary Cell 302, 303 Secondary Cell 3000 points 3001, 3002 Resource Grid 3003, 3004 BWP 3011, 3012, 3013, 3014 offset 3100, 3200 common resource block set 9000 HARQ entities 12000 encoding processing unit 13001, 13002, 13003, 14011, 14012 instances 14001, 14002, 14003, 14004, 14005, 14006, 14007, 14008 Time Resources< / null> < / null> < / null>

Claims

1. A terminal device that communicates with a base station device, A physical layer processing unit and a medium access control layer processing unit are provided, The physical layer processing unit delivers HARQ information included in the received PDCCH to the medium access control layer processing unit; The physical layer processing unit determines the number of instances of PUSCH N based on the number of repetitions N of PUSCH provided from the base station device and external parameters. ｉｎｓｔａｎｃｅ Determine the determined number is delivered to the medium access control layer processing unit; The medium access control layer processing unit obtains one uplink grant from the PDCCH; the medium access control layer processing unit further comprises a HARQ entity and a HARQ process; The HARQ entity performs N uplink transmissions based on the one uplink grant. ｉｎｓｔａｎｃｅ generating uplink grants; The HARQ process ｉｎｓｔａｎｃｅ Based on the uplink grants, N ｉｎｓｔａｎｃｅ The physical layer processing unit is instructed to transmit the Terminal device.

2. A physical layer processing unit and a medium access control layer processing unit are provided, The physical layer processing unit transmits HARQ information on a PDCCH; The physical layer processing unit determines the number of instances of PUSCH N based on the number of repetitions N of PUSCH and external parameters. ｉｎｓｔａｎｃｅ Determine The N ｉｎｓｔａｎｃｅ Attempts to receive the PUSCH based on the uplink grants Base station equipment.

3. A communication method used in a base station device, transmitting HARQ information on a PDCCH; Based on the number of repetitions of PUSCH N and external parameters, the number of instances of PUSCH N ｉｎｓｔａｎｃｅ determining a The N ｉｎｓｔａｎｃｅ and attempting to receive the PUSCH based on the uplink grants. Communication method.

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