Terminal device, base station device, and communication method

Abstract

This terminal device comprises: a reception unit for detecting a DCI format accompanied by a first MCS field with respect to a first transport block and a second MCS field with respect to a second transport block; and a transmission unit for transmitting, on the basis of the DCI format, one or both of the first transport block and the second transport block in a PUSCH. The transmission unit transmits a PTRS multiplexed with the PUSCH. The transmission unit determines the density of PTRS arrangement in time domain on the basis of a procedure that uses one or both of a first MCS index indicated by the first MCS field and a second MCS index indicated by the second MCS field.

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. 2021-140764, filed on August 31, 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] The 3GPP has been formulating a wireless communication standard (NR: New Radio), and is currently studying further extensions to the wireless communication standard (Non-Patent Document 2). [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] “Summary of RAN Rel-18 Workshop”, RWS-210659, RAN chair, 3GPP RAN Rel-18 workshop, 28th June ― 2nd July, 2021 Summary of the Invention [Problem to be solved by the invention]

[0005] One aspect of the present invention provides a terminal device that performs efficient communication and a communication method used in the terminal device. [Means for solving the problem]

[0006] (1) A first aspect of the present invention is a terminal device comprising: a receiving unit that detects a DCI format involving a first MCS field for a first transport block and a second MCS field for a second transport block; and a transmitting unit that transmits one or both of the first transport block and the second transport block on a PUSCH based on the DCI format, wherein the transmitting unit multiplexes a PTRS onto the PUSCH and transmits the multiplexed PTRS; and the transmitting unit determines a density of time domain allocation of the PTRS based on a procedure using one or both of a first MCS index indicated by the first MCS field and a second MCS index indicated by the second MCS field, the procedure being any one of steps 1 to 4, and step 1 selecting a larger MCS index from the first MCS index and the second MCS index, and determining a time domain allocation density of the PTRS based on the selected MCS index. step 2 is a procedure for selecting a smaller MCS index from the first MCS index and the second MCS index, and determining the density of the allocation of the PTRS in the time domain based on the selected MCS index; step 3 is a procedure for determining the density of the allocation of the PTRS in the time domain based on the first MCS index, regardless of whether transmission of the first transport block is indicated; and step 4 is a procedure for selecting the larger number of layers from a first number of layers to which a first codeword corresponding to the first transport block is mapped and a second number of layers to which a second codeword corresponding to the second transport block is mapped, and determining the density of the allocation of the PTRS in the time domain based on the MCS index corresponding to the transport block corresponding to the selected codeword.

[0007] (2) A second aspect of the present invention is a base station apparatus comprising: a transmitter that transmits a DCI format with a first MCS field for a first transport block and a second MCS field for a second transport block; and a receiver that receives a PUSCH that is transmitted based on the DCI format, the PUSCH including one or both of the first transport block and the second transport block, wherein the receiver separates a PTRS from the PUSCH, and the receiver determines a time domain allocation density of the PTRS based on a procedure that uses one or both of a first MCS index indicated by the first MCS field and a second MCS index indicated by the second MCS field, the procedure being any one of steps 1 to 4, and step 1 comprises selecting a larger MCS index from the first MCS index and the second MCS index, and determining a time domain allocation density of the PTRS based on the selected MCS index. step 2 is a procedure for determining the time domain allocation density of the PTRS based on an MCS index; step 2 is a procedure for selecting a smaller MCS index from the first and second MCS indexes, and determining the time domain allocation density of the PTRS based on the selected MCS index; step 3 is a procedure for determining the time domain allocation density of the PTRS based on the first MCS index regardless of whether transmission of the first transport block is indicated; and step 4 is a procedure for selecting the larger number of layers from a first number of layers to which a first codeword corresponding to the first transport block is mapped and a second number of layers to which a second codeword corresponding to the second transport block is mapped, and determining the time domain allocation density of the PTRS based on the MCS index corresponding to the transport block corresponding to the selected codeword.

[0008] (3) A third aspect of the present invention is a communication method used in a terminal device, comprising: detecting a DCI format including a first MCS field for a first transport block and a second MCS field for a second transport block; transmitting one or both of the first transport block and the second transport block on a PUSCH based on the DCI format; multiplexing a PTRS onto the PUSCH and transmitting the multiplexed PTRS; and determining a density of time domain allocation of the PTRS based on a procedure using one or both of a first MCS index indicated by the first MCS field and a second MCS index indicated by the second MCS field, the procedure being any of steps 1 to 4, and step 1 selecting a larger MCS index from the first MCS index and the second MCS index, and step 2 is a procedure for selecting a smaller MCS index from the first MCS index and the second MCS index, and determining the time domain allocation density of the PTRS based on the selected MCS index; step 3 is a procedure for determining the time domain allocation density of the PTRS based on the first MCS index, regardless of whether transmission of the first transport block is indicated; and step 4 is a procedure for selecting the larger number of layers from a first number of layers to which a first codeword corresponding to the first transport block is mapped and a second number of layers to which a second codeword corresponding to the second transport block is mapped, and determining the time domain allocation density of the PTRS based on the MCS index corresponding to the transport block corresponding to the selected codeword. [Effects of the Invention]

[0009] According to one aspect of the present invention, a terminal device can perform communication efficiently. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a conceptual diagram of a wireless communication system 9 according to an aspect of the present embodiment. [Figure 2] FIG. 1 is a diagram illustrating an example of the configuration of a resource grid according to an aspect of the present embodiment. [Figure 3] 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 4] 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 5] FIG. 10 is a diagram illustrating an example of a method for scheduling a PUSCH according to one aspect of the present embodiment. [Figure 6] A figure showing an example of symbol mapping to a VRB according to one aspect of this embodiment. DETAILED DESCRIPTION OF THE INVENTION

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

[0012] 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 closest to N. "·" indicates multiplication.

[0013] Fig. 1 is a conceptual diagram of a wireless communication system 9 according to one aspect of the present embodiment. In Fig. 1, the wireless communication system includes 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).

[0014] In the wireless communication system 9, the terminal device 1 and the base station device 3 may use one or more communication methods. For example, CP-OFDM (Cyclic Prefix - Orthogonal Frequency Division Multiplexing) may be used in the downlink of the wireless communication system 9. Furthermore, either CP-OFDM or DFT-s-OFDM (Discrete Fourier Transform - spread - Orthogonal Frequency Division Multiplexing) may be used in the uplink of the wireless communication system 9. Here, DFT-s-OFDM is a communication method in which modified precoding is applied prior to signal generation in CP-OFDM. Here, modified precoding is also referred to as DFT precoding.

[0015] As shown in Figure 1, the base station device 3 may be configured with one transceiver device (or transmission point, transmission device, reception point, reception device, transmission / reception point). Alternatively, in some cases, the base station device 3 may be configured to include multiple transceivers. When the base station device 3 is configured with multiple transceivers, each of the multiple transceivers may be located in a different geographical location.

[0016] The base station device 3 may provide one or more serving cells. A serving cell may be defined as a set of resources used in the wireless communication system 9. Here, a serving cell is also referred to as a cell.

[0017] A serving cell may be configured to include one downlink component carrier and / or one uplink component carrier. A serving cell may be configured to include two or more downlink component carriers and / or two or more uplink component carriers. Downlink component carriers and uplink component carriers are also collectively referred to as component carriers.

[0018] One or more SCS-specific carriers may be configured for a component carrier. One SCS-specific carrier may be associated with one subcarrier-spacing configuration μ.

[0019] The resources in the wireless communication system 9 may be managed by a resource grid using subcarrier indexes and OFDM symbol indexes.

[0020] The subcarrier spacing (SCS: SubCarrier Spacing) Δf for a certain subcarrier spacing setting μ is Δf=2 μ For example, the subcarrier spacing setting μ may represent any of 0, 1, 2, 3, or 4.

[0021] Time unit T c =1 / (Δf max N f ) may be used to represent the length in the time domain, where Δf max = 480 kHz. f = 4096. The constant κ may be expressed as κ = Δf max N f / (Δf ref N f,ref )=64. Also, Δf ref may be 15 kHz. f,ref is 2048.

[0022] The downlink / uplink signal transmission is of length T f It may be organized into radio frames (system frames, frames) of T f =(Δf max N f / 100)·T s =10ms.

[0023] A radio frame may be configured to include 10 subframes, where the length of the subframe is T sf =(Δf max N f / 1000)·T s = 1 ms. The number of OFDM symbols per subframe may be N subframe,μ symb =N slot symb N subframe,μ slot may be.

[0024] An OFDM symbol is used as a time domain unit for the communication method used in the wireless communication system 9. For example, an OFDM symbol may be used as a time domain unit for CP-OFDM. Alternatively, an OFDM symbol may be used as a time domain unit for DFT-s-OFDM.

[0025] A slot may consist of multiple OFDM symbols, for example, N consecutive OFDM symbols. slot symb For example, in the normal CP setting, N OFDM symbols may constitute one slot. slot symb = 14. In addition, in the setting of the extended CP, N slot symb =12.

[0026] The slots may be indexed in the time domain, e.g., slot index n μ sranges 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.

[0027] 2 is a diagram showing an example of the configuration of a resource grid according to one aspect of this embodiment. In the resource grid of FIG. 2, the horizontal axis represents OFDM symbol index l sym and the vertical axis is the subcarrier index k sc The resource grid in Figure 2 is size,μ grid,x N RB sc contains N subcarriers, subframe,μ symb contains N OFDM symbols, where N size,μ grid,x indicates the bandwidth of the SCS specific carrier. size,μ grid,x The value is in resource blocks.

[0028] 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).

[0029] Resource Block (RB) is N RB sc A 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.

[0030] A BWP (BandWidth Part) may be configured as a subset of the resource grid. Here, a BWP configured for the downlink is also referred to as a downlink BWP. A BWP configured for the uplink is also referred to as an uplink BWP.

[0031] 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 arranged in a resource element. Here, "channel" may mean "propagation path." Furthermore, "channel" may mean "physical channel."

[0032] Two antenna ports are considered to be in a quasi-co-located (QCL) relationship when 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. Here, the large-scale properties may include long-range channel properties. The large-scale properties may include some or all of delay spread, Doppler spread, Doppler shift, average gain, average delay, and beam parameters (spatial Rx parameters). The first and second antenna ports being QCL with respect to beam parameters may mean that the receive beam assumed by the receiver for the first antenna port is the same as (or corresponds to) 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 a transmission beam assumed by the receiving side for the first antenna port and a transmission beam assumed by the receiving side for the second antenna port are the same (or correspond to each other). 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.

[0033] 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.

[0034] 3 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. 3, the base station device 3 includes a physical layer processing unit (radio transmission / reception unit) 30 and / or part or all of a higher layer processing unit 34. The physical layer processing unit 30 includes an antenna unit 31, an RF (Radio Frequency) processing unit 32, and part or all of a baseband processing unit 33. The higher layer processing unit 34 includes a medium access control layer (MAC layer) processing unit 35 and part or all of a radio resource control (RRC) layer processing unit 36.

[0035] The physical layer processing unit 30 performs physical layer processing. Here, the physical layer processing may include some or all of the following: generating a baseband signal of a physical channel; generating a baseband signal of a physical signal; detecting information transmitted by the physical channel; and detecting information transmitted by the physical signal. The physical layer processing may also include mapping a transport channel to a physical channel. Here, the baseband signal is also referred to as a time-continuous signal.

[0036] For example, the physical layer processing unit 30 may generate a baseband signal of a downlink physical channel, where a transport block delivered from a higher layer on the DL-SCH may be mapped to the downlink physical channel.

[0037] For example, the physical layer processing unit 30 may generate a baseband signal of a downlink physical signal.

[0038] For example, the physical layer processing unit 30 may attempt to detect information carried by an uplink physical channel, where a transport block of the information carried by the uplink physical channel may be delivered to higher layers on the UL-SCH.

[0039] For example, the physical layer processing unit 30 may attempt to detect information conveyed by an uplink physical signal.

[0040] The upper layer processing unit 34 performs some or all of the processing of the Medium Access Control (MAC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, and RRC layer. Here, the MAC layer is also referred to as the MAC sublayer. The PDCP layer is also referred to as the PDCP sublayer. The RLC layer is also referred to as the RLC sublayer. The RRC layer is also referred to as the RRC sublayer.

[0041] The medium access control layer processor (MAC layer processor) 35 performs MAC layer processing, which may include some or all of the following: mapping between logical channels and transport channels, multiplexing one or more MAC SDUs (Service Data Units) into transport blocks, disassembling transport blocks delivered from the physical layer on the UL-SCH into one or more MAC SDUs, applying HARQ (Hybrid Automatic Repeat reQuest) to transport blocks, and processing scheduling requests.

[0042] The radio resource control layer processing unit 36 ​​performs processing for the RRC layer. The processing for the RRC layer may include some or all of management of broadcast signals, management of an RRC connection / RRC idle state, and RRC reconfiguration.

[0043] The radio resource control layer processing unit 36 ​​may manage RRC parameters used for various settings of the terminal device 1. For example, the radio resource control layer processing unit 36 ​​may include the RRC parameters in an RRC message on a certain logical channel and transmit the RRC message to the terminal device 1. Here, the RRC message may be mapped to any one of a BCCH (Broadcast Control CHannel), a CCCH (Common Control CHannel), and a DCCH (Dedicated Control CHannel).

[0044] The radio resource control layer processing unit 36 ​​may determine RRC parameters to be transmitted to the terminal device 1 based on the RRC parameters included in the RRC message transmitted from the terminal device 1. Here, the RRC message transmitted from the terminal device 1 may be related to a capability information report of the terminal device 1.

[0045] The physical layer processing unit 30 may perform some or all of modulation processing, encoding processing, and transmission processing. The physical layer processing unit 30 may generate a physical signal based on some or all of encoding processing, modulation processing, and baseband signal generation processing for the transport block. The physical layer processing unit 30 may map the physical signal to a BWP. The physical layer processing unit 30 may transmit the generated physical signal.

[0046] The physical layer processing unit 30 may perform one or both of demodulation and decoding processing. The physical layer processing unit 30 may deliver a transport block of information detected based on the demodulation and decoding processing of the received physical signal to a higher layer on the UL-SCH.

[0047] If carrier sensing is required in the band of the serving cell, the physical layer processing unit 30 may perform carrier sensing prior to transmitting a physical signal.

[0048] The RF unit 32 may convert the signal received via the antenna unit 31 into a baseband signal and remove unnecessary frequency components. The RF unit 32 outputs the baseband signal to the baseband unit 33.

[0049] The baseband unit 33 may digitize the baseband signal input from the RF unit 32. The baseband unit 33 may remove a portion corresponding to a CP (Cyclic Prefix) from the digitized baseband signal. The baseband unit 33 may perform a Fast Fourier Transform (FFT) on the baseband signal from which the CP has been removed, to extract a signal in the frequency domain.

[0050] The baseband unit 33 may generate a baseband signal by performing an Inverse Fast Fourier Transform (IFFT) on the physical signal. The baseband unit 33 may add a CP to the generated baseband signal. The baseband unit 33 may convert the baseband signal to which the CP has been added into an analog signal. The baseband unit 33 may output the analog baseband signal to the RF unit 32.

[0051] The RF unit 32 may remove unnecessary frequency components from the baseband signal input from the baseband unit 33. The RF unit 32 may up-convert the baseband signal to a carrier frequency to generate an RF signal. The RF unit 32 may transmit the RF signal via the antenna unit 31. The RF unit 32 may also have a function of controlling transmission power.

[0052] For the terminal device 1, one or more serving cells (or component carriers, downlink component carriers, uplink component carriers) may be configured.

[0053] 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).

[0054] The PCell is a serving cell included in an MCG (Master Cell Group). The PCell is a cell on which the terminal device 1 performs an initial connection establishment procedure or a connection re-establishment procedure (a cell on which the procedure has been performed).

[0055] The PSCell is a serving cell included in an SCG (Secondary Cell Group). The PSCell is a serving cell on which the terminal device 1 performs a random access procedure.

[0056] An SCell may be included in either an MCG or an SCG.

[0057] A serving cell group (cell group) is a general term for an MCG, an SCG, and a PUCCH cell group. A serving cell group may include one or more serving cells (or component carriers). One or more serving cells (or component carriers) included in a serving cell group may be operated by carrier aggregation.

[0058] One or more downlink BWPs may be configured for the terminal device 1. One or more uplink BWPs may be configured for the terminal device 1.

[0059] Of one or more downlink BWPs configured for the terminal device 1, 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 the terminal device 1, one uplink BWP may be set as an active uplink BWP (or one uplink BWP may be activated).

[0060] The physical layer processing unit 30 may attempt to transmit the PDSCH, PDCCH, and CSI-RS on the active downlink BWP. The physical layer processing unit 10 may attempt to receive the PDSCH, PDCCH, and CSI-RS on the active downlink BWP. The physical layer processing unit 30 may attempt to receive the PUCCH and PUSCH on the active uplink BWP. The physical layer processing unit 10 may attempt to transmit the PUCCH and PUSCH on the active uplink BWP. Here, the active downlink BWP and the active uplink BWP are collectively referred to as the active BWP.

[0061] The physical layer processing unit 30 may not attempt to transmit the PDSCH, PDCCH, and CSI-RS on an inactive downlink BWP (a downlink BWP that is not an active downlink BWP). The physical layer processing unit 10 may not attempt to receive the PDSCH, PDCCH, and CSI-RS on an inactive downlink BWP. The physical layer processing unit 30 may not attempt to receive the PUCCH and PUSCH on an inactive uplink BWP (an uplink BWP that is not an active uplink BWP). The physical layer processing unit 10 may not attempt to transmit the PUCCH and PUSCH on an inactive uplink BWP. Here, the inactive downlink BWP and the inactive uplink BWP are collectively referred to as the inactive BWP.

[0062] A downlink BWP switch is a procedure for deactivating one active downlink BWP of a serving cell and activating one of the inactive downlink BWPs of the serving cell. The downlink BWP switch may be controlled by any of the physical layer, MAC layer, and RRC layer.

[0063] The uplink BWP switching is used to deactivate one active uplink BWP of a serving cell and activate one of the inactive uplink BWPs of the serving cell. The uplink BWP switching may be controlled by any of the physical layer, MAC layer, and RRC layer.

[0064] Two or more downlink BWPs may not be set as active downlink BWPs among one or more downlink BWPs configured for the terminal device 1. For a given component carrier, one downlink BWP may be active at a given time.

[0065] Of one or more uplink BWPs configured for the terminal device 1, two or more uplink BWPs may not be configured as active uplink BWPs. For a given component carrier, one uplink BWP may be active at a given time.

[0066] One downlink BWP may be set as an active downlink BWP for each downlink component carrier, i.e., two or more downlink BWPs may not be set as active downlink BWPs for a given downlink component carrier.

[0067] One uplink BWP may be set as an active uplink BWP for each uplink component carrier, i.e., two or more uplink BWPs may not be set as active uplink BWPs for a given uplink component carrier.

[0068] Fig. 4 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. 4, the terminal device 1 includes a physical layer processing unit (radio transmitting / receiving unit) 10 and part or all of an upper layer processing unit 14. The radio transmitting / receiving unit 10 includes an antenna unit 11, an RF unit 12, and part or all of a baseband unit 13. The upper layer processing unit 14 includes a medium access control layer processing unit 15 and part or all of a radio resource control layer processing unit 16.

[0069] The physical layer processing unit 10 performs processing of the physical layer.

[0070] For example, the physical layer processing unit 10 may generate a baseband signal of an uplink physical channel, where a transport block delivered from a higher layer on the UL-SCH may be mapped to the uplink physical channel.

[0071] For example, the physical layer processing unit 10 may generate a baseband signal of an uplink physical signal.

[0072] For example, the physical layer processing unit 10 may attempt to detect information transmitted by a downlink physical channel, where a transport block of the information transmitted by the downlink physical channel may be delivered to a higher layer on the DL-SCH.

[0073] For example, the physical layer processing unit 10 may attempt to detect information carried by a downlink physical signal.

[0074] The upper layer processing unit 14 performs part or all of the processing of a Medium Access Control (MAC) layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, and an RRC layer.

[0075] A medium access control layer processing unit (MAC layer processing unit) 15 performs MAC layer processing.

[0076] The radio resource control layer processing unit 16 performs processing for the RRC layer.

[0077] The radio resource control layer processing unit 16 may manage RRC parameters transmitted from the base station device 3. For example, the radio resource control layer processing unit 16 may acquire RRC parameters included in an RRC message on a certain logical channel and set the acquired RRC parameters in a storage area of ​​the terminal device 1. The RRC parameters set in the storage area of ​​the terminal device 1 may be provided to a lower layer.

[0078] The radio resource control layer processing unit 16 may include function information generated based on the functions of the terminal device 1 in an RRC message and transmit the RRC message to the base station device 3.

[0079] The physical layer processing unit 10 may perform some or all of modulation processing, encoding processing, and transmission processing. The physical layer processing unit 10 may generate a physical signal based on some or all of encoding processing, modulation processing, and baseband signal generation processing for the transport block. The physical layer processing unit 10 may map the physical signal to a certain BWP. The physical layer processing unit 10 may transmit the generated physical signal.

[0080] The physical layer processing unit 10 may perform one or both of demodulation and decoding processes. The physical layer processing unit 10 may deliver a transport block of information detected based on the demodulation and decoding processes on the received physical signal to a higher layer on the DL-SCH.

[0081] When carrier sensing is required in the band of the serving cell, the physical layer processing unit 10 may perform carrier sensing prior to transmitting a physical signal.

[0082] The RF unit 12 may convert the signal received via the antenna unit 11 into a baseband signal and remove unnecessary frequency components. The RF unit 12 outputs the baseband signal to the baseband unit 13.

[0083] The baseband unit 13 may digitize the baseband signal input from the RF unit 12. The baseband unit 13 may remove a portion corresponding to a CP (Cyclic Prefix) from the digitized baseband signal. The baseband unit 13 may perform a Fast Fourier Transform (FFT) on the baseband signal from which the CP has been removed, to extract a signal in the frequency domain.

[0084] The baseband unit 13 may generate a baseband signal by performing an Inverse Fast Fourier Transform (IFFT) on the physical signal. The baseband unit 13 may add a CP to the generated baseband signal. The baseband unit 13 may convert the baseband signal to which the CP has been added into an analog signal. The baseband unit 13 may output the analog baseband signal to the RF unit 12.

[0085] The RF unit 12 may remove unnecessary frequency components from the baseband signal input from the baseband unit 13. The RF unit 12 may up-convert the baseband signal to a carrier frequency to generate an RF signal. The RF unit 12 may transmit the RF signal via the antenna unit 31. The RF unit 12 may also have a function of controlling transmission power.

[0086] The physical signals will be explained below.

[0087] 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.

[0088] An uplink physical channel may correspond to a set of resource elements that convey 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 physical layer processing unit 10. The uplink physical channel may be received by the physical layer processing unit 30. In the uplink of the wireless communication system according to one aspect of the present embodiment, 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)

[0089] The PUCCH may be transmitted to deliver (transmit, convey) uplink control information (UCI). The uplink control information may be mapped to the PUCCH. The physical layer processing unit 10 may transmit the PUCCH in which the uplink control information is mapped. The physical layer processing unit 30 may receive the PUCCH in which the uplink control information is mapped.

[0090] The uplink control information (uplink control information bits, uplink control information sequence, uplink control information type) includes some or all of channel state information (CSI), scheduling request (SR), and hybrid automatic repeat request ACKnowledgement (HARQ-ACK) information.

[0091] 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.

[0092] The HARQ-ACK information may be composed of HARQ-ACK bits corresponding to a transport block (TB). An HARQ-ACK bit may indicate an acknowledgement (ACK) or a negative acknowledgement (NACK) corresponding to a transport block. An ACK may indicate that the transport block has been decoded successfully. A NACK may indicate that the transport block has not been decoded successfully. The HARQ-ACK information may include one or more HARQ-ACK bits.

[0093] The HARQ-ACK for a transport block is also referred to as the HARQ-ACK for a PDSCH, where "HARQ-ACK for a PDSCH" refers to the HARQ-ACK for a transport block included in the PDSCH.

[0094] The scheduling request may be used to request UL-SCH resources for an initial transmission. The scheduling request bit may be used to indicate either a positive SR or a negative SR. When the scheduling request bit indicates a positive SR, this is also referred to as "a positive SR is transmitted." A positive SR may indicate that UL-SCH resources are requested by the media access control layer processing unit 15 for the initial transmission. When the scheduling request bit indicates a negative SR, this is also referred to as "a negative SR is transmitted." A negative SR may indicate that UL-SCH resources are not requested by the media access control layer processing unit 15 for the initial transmission.

[0095] The channel state information may include 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).

[0096] The channel state information is an indicator related to the reception state of a physical signal (e.g., CSI-RS) used for channel measurement. The value of the channel state information may be determined by the terminal device 1 based on the reception state assumed by the physical signal used for channel measurement. The channel measurement may include interference measurement.

[0097] The PUCCH may have a PUCCH format, where the PUCCH format may be a format of physical layer processing of the PUCCH, or a format of information conveyed using the PUCCH.

[0098] The PUSCH may be transmitted to convey one or both of uplink control information and a transport block. The PUSCH may be used to convey one or both of uplink control information and a transport block. The terminal device 1 may transmit a PUSCH in which one or both of uplink control information and a transport block are allocated. The base station device 3 may receive a PUSCH in which one or both of uplink control information and a transport block are allocated.

[0099] The PRACH may be transmitted to convey an index of the random access preamble. The terminal device 1 may transmit the PRACH. The base station device 3 may receive the PRACH. The terminal device 1 may transmit the random access preamble on the PRACH. The base station device 3 may receive the random access preamble on the PRACH.

[0100] The uplink physical signal may correspond to a set of resource elements. The uplink physical signal does not have to be used to transmit information generated in a higher layer. The uplink physical signal may be used to transmit information generated in the physical layer. The uplink physical signal may be a physical signal used in an uplink component carrier. The physical layer processing unit 10 may transmit the uplink physical signal. The physical layer processing unit 30 may receive the uplink physical signal. In the uplink of the wireless communication system according to one aspect of the present embodiment, some or all of the following uplink physical signals may be used. ·UL DMRS(UpLink Demodulation Reference Signal) ·SRS(Sounding Reference Signal) ·UL PTRS(UpLink Phase Tracking Reference Signal)

[0101] UL DMRS is a general term for DMRS for PUSCH and DMRS for PUCCH.

[0102] The set of antenna ports for 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. For example, the set of antenna ports for DMRSs for PUSCH may be the same as the set of antenna ports for the PUSCH.

[0103] The propagation path of the PUSCH may be estimated from the DMRS for the PUSCH.

[0104] 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.

[0105] The propagation path of the PUCCH may be estimated from the DMRS for the PUCCH.

[0106] The downlink physical channel may correspond to a set of resource elements that convey information generated in a higher layer. The downlink physical channel may be a physical channel used in a downlink component carrier. The physical layer processing unit 30 may transmit the downlink physical channel. The physical layer processing unit 10 may receive the downlink physical channel. In the downlink of the wireless communication system according to one aspect of the present embodiment, some or all of the following downlink physical channels may be used. ·PBCH(Physical Broadcast Channel) ·PDCCH (Physical Downlink Control Channel) ·PDSCH(Physical Downlink Shared Channel)

[0107] The PBCH may be transmitted to carry one or both of a Master Information Block (MIB) and physical layer control information, where the physical layer control information is information generated in the physical layer. The MIB is an RRC message delivered from higher layers on the Broadcast Control Channel (BCCH).

[0108] The PDCCH may be transmitted to convey downlink control information (DCI). The downlink control information may be arranged in the PDCCH. The terminal device 1 may receive the PDCCH in which the downlink control information is arranged. The base station device 3 may transmit the PDCCH in which the downlink control information is arranged.

[0109] The downlink control information may be transmitted with a DCI format. The DCI format may be interpreted as a format of the downlink control information. The DCI format may also be interpreted as a set of downlink control information set in a certain downlink control information format.

[0110] The base station device 3 may notify the terminal device 1 of downlink control information using a PDCCH with a DCI format. Here, the terminal device 1 may monitor the PDCCH to acquire the downlink control information. Unless otherwise specified, the DCI format and the downlink control information may be described as equivalent. For example, the base station device 3 may include the downlink control information in a DCI format and transmit it to the terminal device 1. Furthermore, the terminal device 1 may control the physical layer processing unit 10 using the downlink control information included in the detected DCI format.

[0111] DCI format 0_0, DCI format 0_1, DCI format 1_0, and DCI format 1_1 are DCI formats. 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.

[0112] DCI format 0_0 is used for scheduling a PUSCH allocated to a certain cell, and may include 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)

[0113] The DCI format identification field may indicate whether the DCI format including the DCI format identification field is an uplink DCI format or a downlink DCI format. That is, the DCI format identification field may be included in both the uplink DCI format and the downlink DCI format. Here, the DCI format identification field included in DCI format 0_0 may indicate 0.

[0114] The frequency domain resource allocation field included in DCI format 0_0 may be used to indicate the allocation of frequency resources for the PUSCH scheduled by DCI format 0_0.

[0115] The time domain resource allocation field included in DCI format 0_0 may be used to indicate the allocation of time resources for the PUSCH scheduled by DCI format 0_0.

[0116] The frequency hopping flag field may be used to indicate whether frequency hopping is applied to the PUSCH scheduled by the DCI format 0_0.

[0117] The MCS field included in DCI format 0_0 may be used to indicate one or both of a modulation scheme for a PUSCH scheduled by DCI format 0_0 and a target coding rate scheduled by DCI format 0_1. The target coding rate may be a target coding rate for a transport block allocated to the PUSCH. The size of the transport block (TBS) allocated to the PUSCH may be determined based on part or all of the target coding rate and the modulation scheme for the PUSCH.

[0118] DCI format 0_0 may not include fields used for CSI requests.

[0119] DCI format 0_0 may not include a carrier indicator field. That is, the serving cell to which the uplink component carrier on which the PUSCH scheduled by DCI format 0_0 is allocated may be the same as the serving cell of the downlink component carrier on which the PDCCH including the DCI format 0_0 is allocated. By detecting DCI format 0_0 on a downlink component carrier of a serving cell, the terminal device 1 may recognize that the PUSCH scheduled by the DCI format 0_0 is allocated on the uplink component carrier of the serving cell.

[0120] DCI format 0_0 may not include a BWP field. Here, DCI format 0_0 may be a DCI format for scheduling a PUSCH without changing an active uplink BWP. Based on detecting DCI format 0_0 used for scheduling a PUSCH, the terminal device 1 may recognize that the PUSCH will be transmitted without switching the active uplink BWP.

[0121] DCI format 0_1 ​​is used for scheduling a PUSCH allocated to a certain cell. DCI format 0_1 ​​includes 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

[0122] The DCI format specific field included in DCI format 0_1 ​​may indicate 0.

[0123] The frequency domain resource allocation field included in DCI format 0_1 ​​may be used to indicate the allocation of frequency resources for the PUSCH scheduled by DCI format 0_1.

[0124] The time domain resource allocation field included in DCI format 0_1 ​​may be used to indicate the allocation of time resources for the PUSCH scheduled by DCI format 0_1.

[0125] The MCS field included in DCI format 0_1 ​​may be used to indicate one or both of the modulation scheme for the PUSCH scheduled by DCI format 0_1 ​​and the target coding rate for the PUSCH scheduled by DCI format 0_1.

[0126] The BWP field of DCI format 0_1 ​​may be used to indicate an uplink BWP in which a PUSCH scheduled by the DCI format 0_1 ​​is arranged. That is, the DCI format 0_1 ​​may or may not involve a change of the active uplink BWP. The terminal device 1 may recognize the uplink BWP in which the PUSCH is arranged based on detecting the DCI format 0_1 ​​used for scheduling the PUSCH.

[0127] The DCI format 0_1 ​​that does not include a BWP field may be a DCI format for scheduling a PUSCH without changing the active uplink BWP. The terminal device 1 may recognize that the PUSCH is to be transmitted without switching the active uplink BWP based on detecting the DCI format 0_1 ​​that is used for scheduling a PUSCH and does not include a BWP field.

[0128] If the DCI format 0_1 ​​includes a BWP field but the terminal device 1 does not support the BWP switching function using the DCI format 0_1, the BWP field may be ignored by the terminal device 1. That is, a terminal device 1 that does not support the BWP switching function may recognize that it will transmit the PUSCH without switching the active uplink BWP based on detecting the DCI format 0_1 ​​that is used for scheduling the PUSCH and includes the BWP field. Here, if the BWP switching function is supported, the radio resource control layer processing unit 16 may include, in the RRC message, capability information indicating that the BWP switching function is supported.

[0129] The CSI request field may be used to indicate the reporting of CSI.

[0130] When DCI format 0_1 ​​includes a carrier indicator field, the carrier indicator field may be used to indicate the serving cell of the uplink component carrier on which the PUSCH is arranged. Based on detecting DCI format 0_1 ​​in the downlink component carrier of a serving cell, the terminal device 1 may recognize that the PUSCH scheduled by the DCI format 0_1 ​​is arranged on the uplink component carrier of the serving cell indicated by the carrier indicator field included in the DCI format 0_1.

[0131] If DCI format 0_1 ​​does not include a carrier indicator field, the serving cell to which the uplink component carrier on which the PUSCH scheduled by DCI format 0_1 ​​is allocated may be the same as the serving cell of the downlink component carrier on which the PDCCH including the DCI format 0_1 ​​is allocated. Based on detecting DCI format 0_1 ​​on a downlink component carrier of a serving cell, the terminal device 1 may recognize that the PUSCH scheduled by the DCI format 0_1 ​​is allocated on the uplink component carrier of the serving cell.

[0132] DCI format 1_0 is used for scheduling a PDSCH allocated to a certain cell, and is configured by including 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

[0133] The DCI format specific field included in DCI format 1_0 may indicate 1.

[0134] The frequency domain resource allocation field included in DCI format 1_0 may be used to indicate the allocation of frequency resources for the PDSCH scheduled by that DCI format.

[0135] The time domain resource allocation field included in DCI format 1_0 may be used to indicate the allocation of time resources for the PDSCH scheduled by that DCI format.

[0136] The MCS field included in DCI format 1_0 may be used to indicate one or both of a modulation scheme for a PDSCH scheduled by the DCI format and a target coding rate for the PDSCH scheduled by the DCI format. The target coding rate may be a target coding rate for a transport block allocated to the PDSCH. The size of the transport block (TBS) allocated to the PDSCH may be determined based on one or both of the target coding rate and the modulation scheme for the PDSCH.

[0137] The PDSCH_HARQ feedback timing indication field may be used 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.

[0138] The PUCCH resource indication field may be used to indicate the resource of the PUCCH.

[0139] DCI format 1_0 may not include a carrier indicator field. That is, 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. The terminal device 1 may recognize that the PDSCH scheduled by DCI format 1_0 is to be arranged on the downlink component carrier based on detecting DCI format 1_0 on the downlink component carrier.

[0140] DCI format 1_0 may not include a BWP field. Here, DCI format 1_0 may be a DCI format for scheduling a PDSCH without changing an active downlink BWP. The terminal device 1 may recognize that it will receive the PDSCH without switching the active downlink BWP based on detecting DCI format 1_0 used for scheduling the PDSCH.

[0141] DCI format 1_1 is used for scheduling a PDSCH allocated to a certain cell, and is configured to include 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

[0142] The DCI format specific field included in DCI format 1_1 may indicate 1.

[0143] The frequency domain resource allocation field included in DCI format 1_1 may be used to indicate the allocation of frequency resources for the PDSCH scheduled by DCI format 1_1.

[0144] The time domain resource allocation field included in DCI format 1_1 may be used to indicate the allocation of time resources for the PDSCH scheduled by DCI format 1_1.

[0145] The MCS field included in DCI format 1_1 may be used to indicate one or both of the modulation scheme for the PDSCH scheduled by DCI format 1_1 and the target coding rate for the PDSCH scheduled by DCI format 1_1.

[0146] If DCI format 1_1 includes a PDSCH_HARQ feedback timing indication field, the PDSCH_HARQ feedback timing indication field may be used to indicate an offset from the slot including the last OFDM symbol of the PDSCH to the slot including the first OFDM symbol of the PUCCH. If DCI format 1_1 does not include a PDSCH_HARQ feedback timing indication field, a parameter indicating the offset from the slot including the last OFDM symbol of the PDSCH to the slot including the first OFDM symbol of the PUCCH may be provided by the RRC layer.

[0147] The PUCCH resource indication field may be used to indicate the resource of the PUCCH.

[0148] The BWP field of DCI format 1_1 may be used to indicate the downlink BWP in which the PDSCH scheduled by the DCI format 1_1 is arranged. That is, the DCI format 1_1 may or may not involve a change of the active downlink BWP. The terminal device 1 may recognize the downlink BWP in which the PDSCH is arranged based on detecting the DCI format 1_1 used for scheduling the PDSCH.

[0149] The DCI format 1_1 that does not include a BWP field may be a DCI format for scheduling a PDSCH without changing the active downlink BWP. The terminal device 1 may recognize that it will receive the PDSCH without switching the active downlink BWP based on detecting the DCI format 1_1 that is used for scheduling a PDSCH and does not include a BWP field.

[0150] If the DCI format 1_1 includes a BWP field but the terminal device 1 does not support the BWP switching function by the DCI format 1_1, the BWP field may be ignored by the terminal device 1. In other words, a terminal device 1 that does not support the BWP switching function may recognize that it will receive the PDSCH without switching the active downlink BWP based on detecting DCI format 1_1 that is used for scheduling the PDSCH and includes a BWP field. Here, if the BWP switching function is supported, the radio resource control layer processing unit 16 may include, in the RRC message, capability information indicating that the BWP switching function is supported.

[0151] When DCI format 1_1 includes a carrier indicator field, the carrier indicator field may be used to indicate the serving cell of the downlink component carrier on which the PDSCH scheduled by DCI format 1_1 is arranged. Based on detecting DCI format 1_1 on the downlink component carrier of a serving cell, the terminal device 1 may recognize that the PDSCH scheduled by DCI format 1_1 is arranged on the downlink component carrier of the serving cell indicated by the carrier indicator field included in DCI format 1_1.

[0152] If DCI format 1_1 does not include a carrier indicator field, the downlink component carrier on which the PDSCH scheduled by DCI format 1_1 is arranged may be the same as the downlink component carrier on which the PDCCH including DCI format 1_1 is arranged. Based on detecting DCI format 1_1 in a certain downlink component carrier, the terminal device 1 may recognize that the PDSCH scheduled by DCI format 1_1 is to be arranged on the downlink component carrier.

[0153] The PDSCH may be transmitted to transmit a transport block. The PDSCH may be used to transmit a transport block. The transport block may be arranged in the PDSCH. The base station device 3 may transmit the PDSCH in which the transport block is arranged. The terminal device 1 may receive the PDSCH in which the transport block is arranged.

[0154] The downlink physical signal may correspond to a set of resource elements. The downlink physical signal does not have to be used to transmit information generated in a higher layer. The downlink physical signal may be used to transmit information generated in the physical layer. The downlink physical signal may be a physical signal used in a downlink component carrier. The physical layer processing unit 10 may transmit the downlink physical signal. The physical layer processing unit 30 may receive the downlink physical signal. In the downlink of the wireless communication system according to one aspect of the present embodiment, at least some or all of the following downlink physical signals may be used. ·Synchronization signal (SS) ·DL DMRS(DownLink DeModulation Reference Signal) ·CSI-RS(Channel State Information-Reference Signal) ·DL PTRS(DownLink Phase Tracking Reference Signal)

[0155] The synchronization signal may be used by the terminal device 1 to synchronize one or both of the frequency domain and the time domain of the downlink. The synchronization signal is a general term for a PSS (Primary Synchronization Signal) and an SSS (Secondary Synchronization Signal).

[0156] The antenna ports for the PSS, SSS, PBCH, and DMRS for the PBCH may be the same.

[0157] 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.

[0158] DL DMRS is a general term for DMRS for PBCH, DMRS for PDSCH, and DMRS for PDCCH.

[0159] 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. For example, the set of antenna ports for DMRSs for a PDSCH may be the same as the set of antenna ports for the PDSCH.

[0160] A propagation path of a PDSCH may be estimated from a DMRS for the PDSCH. If a set of resource elements carrying a certain PDSCH symbol and a set of resource elements carrying a DMRS symbol for the PDSCH 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.

[0161] 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.

[0162] The propagation path of a PDCCH may be estimated from the DMRS for the PDCCH. If the same precoder is applied (or assumed to be applied) to a set of resource elements on which a 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 PDCCH symbol for a certain antenna port is transmitted may be estimated by the DMRS for the PDCCH.

[0163] A BCH (Broadcast CHannel), a UL-SCH (Uplink-Shared CHannel), and a DL-SCH (Downlink-Shared CHannel) are transport channels.

[0164] The BCH of the transport layer may be mapped to the PBCH of the physical layer. That is, a transport block delivered from an upper layer on the BCH of the transport layer may be placed on the PBCH of the physical layer. Also, the UL-SCH of the transport layer may be mapped to the PUSCH of the physical layer. That is, a transport block delivered from an upper layer on the UL-SCH of the transport layer may be placed on the PUSCH of the physical layer. Also, the DL-SCH of the transport layer may be mapped to the PDSCH of the physical layer. That is, a transport block delivered from an upper layer on the DL-SCH of the transport layer may be placed on the PDSCH of the physical layer.

[0165] The transport layer may apply Hybrid Automatic Repeat reQuest (HARQ) to the transport block.

[0166] The BCCH (Broadcast Control CHannel), CCCH (Common Control CHannel), and DCCH (Dedicated Control CHannel) are logical channels. For example, the BCCH may be used to deliver an RRC message including an MIB or an RRC message including system information. The CCCH may also be used to transmit an RRC message including RRC parameters common to multiple terminal devices 1. Here, the CCCH may be used, for example, for terminal devices 1 that are not RRC connected. The DCCH may also be used to transmit an RRC message dedicated to a certain terminal device 1. Here, the DCCH may be used, for example, for terminal devices 1 that are RRC connected.

[0167] The BCCH may be mapped to the BCH or DL-SCH. That is, an RRC message containing MIB information may be delivered on the BCH. An RRC message containing system information other than MIB information may be delivered on the DL-SCH. The CCCH may be mapped to the DL-SCH or UL-SCH. That is, an RRC message mapped to the CCCH may be delivered on the DL-SCH or UL-SCH. The DCCH may be mapped to the DL-SCH or UL-SCH. That is, an RRC message mapped to the DCCH may be delivered on the DL-SCH or UL-SCH.

[0168] The base station device 3 may schedule one PUSCH for transmission of one or more transport blocks. For example, a certain uplink DCI format may be used for scheduling one PUSCH used for transmission of one or more transport blocks. Here, a certain uplink DCI format may include a field indicating parameters for each of the multiple transport blocks.

[0169] Hereinafter, a method for scheduling a PUSCH used for transmitting two transport blocks will be described as an example of a method for scheduling one PUSCH used for transmitting multiple transport blocks. Note that each of the various aspects of this embodiment is not limited to scheduling one PUSCH used for transmitting two transport blocks. For example, each of the various aspects of this embodiment may be applied to scheduling one PUSCH used for transmitting three transport blocks.

[0170] 5 is a diagram showing an example of a method for scheduling a PUSCH according to one aspect of this embodiment. Here, 5000 is a PDCCH. PDCCH 5000 is used to transmit DCI format 5001. 5010 is a PUSCH scheduled by DCI format 5001. PUSCH 5010 is used to transmit transport block 5011 and transport block 5012.

[0171] DCI format 5001 may be used to determine an MCS value associated with transport block 5011 and an MCS value associated with transport block 5012. For example, DCI format 5001 may include a first MCS field indicating an MCS value associated with transport block 5011 and a second MCS field indicating an MCS value associated with transport block 5012.

[0172] DCI format 5001 may be used to determine a New Data Indicator (NDI) associated with transport block 5011 and an NDI associated with transport block 5012. For example, DCI format 5001 may include a first NDI field used to indicate an NDI associated with transport block 5011 and a second NDI field used to indicate an NDI associated with transport block 5012.

[0173] DCI format 5001 may be used to determine an RV (Redundancy Version) associated with transport block 5011 and an RV associated with transport block 5012. For example, DCI format 5001 may include a first RV field used to indicate an RV associated with transport block 5011 and a second RV field used to indicate an RV associated with transport block 5012.

[0174] DCI format 5001 may be used to determine an HPN (HARQ Process Number) associated with transport block 5011 and an HPN associated with transport block 5012. For example, DCI format 5001 may include a first HPN field used to indicate an HPN associated with transport block 5011 and a second HPN field used to indicate an HPN associated with transport block 5012.

[0175] First, the physical layer processing unit 10 may recognize a sequence of information bits in the DCI format 5001. Here, the physical layer processing unit 10 may interpret the sequence of recognized information bits by associating each bit of the sequence of recognized information bits with any of the fields. The physical layer processing unit 10 may prepare for transmission of the PUSCH 5010 based on information obtained based on the interpretation.

[0176] In preparation for transmitting PUSCH 5010, physical layer processing unit 10 may first determine the size of transport block 5011 and the size of transport block 5012. Here, the MCS value associated with transport block 5011 may be used to determine the size of transport block 5011. Also, the MCS value associated with transport block 5012 may be used to determine the size of transport block 5012.

[0177] Next, the physical layer processing unit 10 may obtain transport block 5011 delivered on the UL-SCH. The physical layer processing unit 10 may also obtain transport block 5012 delivered on the UL-SCH.

[0178] Next, the physical layer processing unit 10 may perform encoding of transport block 5011 and encoding of transport block 5012. Here, the encoding of the transport blocks by the physical layer processing unit 10 may include some or all of the following procedures: a CRC attachment procedure, a code block division procedure, an error correction coding procedure, a rate matching procedure, and a UCI multiplexing procedure.

[0179] Here, the CRC addition procedure may be a procedure of generating a CRC sequence to be added to a transport block and adding the generated CRC sequence to the transport block.

[0180] Alternatively, the code block segmentation procedure may be a procedure for segmenting a transport block to which a CRC sequence has been added into multiple code blocks. Here, if the size of the transport block to which a CRC sequence has been added exceeds a predetermined value, the transport block to which a CRC sequence has been added may be segmented into multiple code blocks. Alternatively, if the size of the transport block to which a CRC sequence has been added does not exceed a predetermined value, the transport block to which a CRC sequence has been added may itself be recognized as one code block.

[0181] The error correction coding procedure may also be a procedure in which error correction coding is performed for each code block.

[0182] Furthermore, the rate matching procedure may be a procedure for adjusting the arrangement of a coded bit sequence generated in an error correction coding procedure to match the number of bits that can be transmitted in PUSCH 5010. Here, the value of the RV associated with the transport block may be used for the procedure for adjusting the arrangement of a coded bit sequence generated in an error correction coding procedure.

[0183] Furthermore, the UCI multiplexing procedure may be a procedure of multiplexing a coded bit sequence after adjustment in the rate matching procedure and a coded bit sequence of uplink control information. Here, when there is no uplink control information to be multiplexed onto the PUSCH 5010, the UCI multiplexing procedure may or may not be performed.

[0184] Next, the physical layer processing unit 10 may generate a baseband signal for the PUSCH after encoding the transport block 5011 and encoding the transport block 5012. Here, the generation of the baseband signal for the PUSCH by the physical layer processing unit 10 includes at least some or all of the following steps B1 to B8. Step B1) Scrambling Step B2) Modulation processing Step B3) Layer Mapping Step B4) Modified Precoding Step B5) Precoding Step B6) Symbol mapping to VRB Step B7) Mapping VRB to PRB Step B8) Baseband signal generation

[0185] Prior to performing step B1, the physical layer processing unit 10 may perform a step of mapping transport blocks to codewords. For example, transport block 5011 may be mapped to codeword #0, and transport block 5012 may be mapped to codeword #1.

[0186] In some cases, in the procedure of mapping transport blocks to codewords, transport block 5011 may be mapped to codeword #1, and transport block 5012 may be mapped to codeword #0. This procedure of reversing the mapping of transport blocks and codewords is also called codeword swapping. For example, whether or not codeword swapping is performed may be determined based on the value of a field included in DCI format 5001. Alternatively, whether or not codeword swapping is performed may be indicated by the value of a field included in DCI format 5001.

[0187] Bit sequence b of codeword #q (q) may be the encoded sequence of the transport block mapped to the codeword #q. For example, the bit sequence b (0) may be the bit sequence of the transport block 5011 after encoding. (1) may be the encoded sequence of the transport block 5012. Here, q may be a variable indicating the index of the codeword (e.g., 0 or 1). Here, the bit sequence b of the codeword #q (q) The kth element of b (q) (k), where k ranges from 0 to M (q) bit -1. Also, M (q) bit is the bit sequence b of codeword #q (q) Indicates the size.

[0188] In step B1, the physical layer processing unit 10 converts the bit sequence b (q) For example, in step B1, the bit sequence b a(q) is the calculation process b a(q) (k)=mod(b (q) (k)+c (q) (k), 2), where the bit sequence c (q)is the bit sequence used for scrambling for codeword q. Also, the bit sequence c (q) may be a pseudo-random sequence, where the bit sequence c (q) The value of the RNTI used for scrambling the CRC added to the DCI format used for scheduling the PUSCH may be used to initialize the bit sequence b a(q) may be input to step B2.

[0189] If scrambling is not performed in step B1, the input information of step B1, that is, the bit sequence b (q) But, b a(q) may be input in step B2.

[0190] In step B2, bit sequence b a(q) A modulation process may be applied to the bit sequence b a(q) The complex-valued symbol sequence d generated by the modulation process for (q) may be input to step B3, where the complex-valued symbol sequence d (q) The jth element of is d (q) (j), where j is from 0 to M (q) symb It is an integer of −1. Here, the types of modulation processing may include some or all of QPSK (Quadrarature Phase Shift Keying), 16QAM (Quadrarature Amplitude Modulation), 64QAM, 256QAM, and 1024QAM.

[0191] If no modulation processing is performed in step B2, the bit sequence b a(q) is a complex-valued symbol sequence d (q) may be input in step B3.

[0192] In step B3, a complex-valued symbol sequence d (q) In layer mapping, a complex-valued symbol sequence d (q)is a sequence of v complex-valued symbols x (h) where the h-th complex-valued symbol sequence x (h) The gth element of x (h) (g). Also, v indicates the number of PUSCH layers. Also, g ranges from 0 to M layer symb It indicates an integer of -1. Also, M layer symb denotes the number of complex-valued symbols for each complex-valued symbol sequence.

[0193] For example, the layer mapping method may be determined based on one or both of the number of layers v of the PUSCH and the number C of codewords transmitted by the PUSCH. For example, when the number of layers v of the PUSCH is 1 and the number C of codewords transmitted by the PUSCH is 1, x (0) (g)=d (0) Based on the relationship in (g), the complex-valued symbol sequence d for codeword #0 is (0) is the 0th complex-valued symbol sequence x (0) may be mapped to

[0194] For example, if the number of layers of the PUSCH is v=2 and the number of codewords transmitted by the PUSCH is C=1, then x (0) (g)=d (0) Based on the relationship in (2g), the complex-valued symbol sequence d for codeword #0 is (0) The part of the complex-valued symbol sequence x (0) In addition, when the number of layers of the PUSCH is v=2 and the number of codewords transmitted by the PUSCH is C=1, x (1) (g)=d (0) Based on the (2g+1) relationship, the complex-valued symbol sequence d for codeword #0 is (0) A part of the first complex-valued symbol sequence x (1) may be mapped to

[0195] For example, if the number of layers of the PUSCH is v=2 and the number of codewords transmitted by the PUSCH is C=2, then x (0)(g)=d (0) Based on the relationship in (g), the complex-valued symbol sequence d for codeword #0 is (0) is the 0th complex-valued symbol sequence x (0) In addition, when the number of layers of the PUSCH is v=2 and the number of codewords transmitted by the PUSCH is C=2, x (1) (g)=d (1) Based on the relationship (g), the complex-valued symbol sequence d for codeword #1 is (1) is the first complex-valued symbol sequence x (1) may be mapped to

[0196] For example, if the number of layers of the PUSCH is v=5 and the number of codewords transmitted on the PUSCH is C=2, five layers may be allocated for two codewords. For example, if the number of layers of the PUSCH is v=5 and the number of codewords transmitted on the PUSCH is C=2, then x (0) (g)=d (0) Based on the relationship in (2g), the complex-valued symbol sequence d for codeword #0 is (0) The part of the complex-valued symbol sequence x (0) In addition, when the number of layers of the PUSCH is v=5 and the number of codewords transmitted by the PUSCH is C=2, x (1) (g)=d (0) Based on the (2g+1) relationship, the complex-valued symbol sequence d for codeword #0 is (0) A part of the first complex-valued symbol sequence x (1) Furthermore, if the number of layers of the PUSCH is v=5 and the number of codewords transmitted in the PUSCH is C=2, then x (2) (g)=d (0) Based on the relationship in (3g), the complex-valued symbol sequence d for codeword #1 is (1) A part of the second complex-valued symbol sequence x (2) In addition, when the number of layers of the PUSCH is v=5 and the number of codewords transmitted by the PUSCH is C=2, x (3)(g)=d (0) Based on the (3g+1) relationship, the complex-valued symbol sequence d for codeword #1 is (1) A part of the third complex-valued symbol sequence x (3) In addition, when the number of layers of the PUSCH is v=5 and the number of codewords transmitted by the PUSCH is C=2, x (4) (g)=d (0) Based on the (3g+2) relationship, the complex-valued symbol sequence d for codeword #1 is (1) A part of the fourth complex-valued symbol sequence x (4) may be mapped to

[0197] In step B3, for example, when v=1, layer mapping may not be applied. When layer mapping is not applied in step B3, the complex-valued symbol sequence d (0) is the 0th complex-valued symbol sequence x (0) may be input in step B4.

[0198] In step B4, a complex-valued symbol sequence x (h) In modified precoding, a complex-valued symbol sequence x (h) is y (h) Here, the modified precoding in step B4 is transformed into a complex-valued symbol sequence x (h) corresponds to the DFT (Discrete Fourier Transform) for

[0199] If modified precoding is not applied in step B4, the h-th complex-valued symbol x (h) is the h-th complex-valued symbol sequence y (h) For example, when the signal waveform applied to the PUSCH is CP-OFDM, modified precoding does not need to be applied in step B4.

[0200] In step B5, the complex-valued symbol sequence y(h) In the precoding, [z (0) (g), z (1) (g),···z (p) (g),···,z (P-1) (g)] T =W·[y (0) (g),y (1) (g),···y (h) (g),···,y (v-1) (g)] T By this, the pth complex-valued symbol sequence z (p) element z of (p) (g) may be generated, where p denotes an integer from 0 to P-1, and P denotes the pth complex-valued symbol sequence z (p) P is also called the number of antenna ports. W is a P×v matrix. W is also called a precoding matrix. [A,B,...,C] indicates a row vector that includes at least row vectors A, B, and C. [] T denotes the transpose of a row vector.

[0201] If no precoding is applied in step B5, the h-th complex-valued symbol sequence y (h) is the pth complex-valued symbol sequence z (p) may be input to step B6 as h=p. For example, h=p may be input. For example, if W=1, no precoding may be applied in step B5.

[0202] 6 is a diagram showing an example of symbol mapping to a VRB according to one aspect of this embodiment. In FIG. 6, the horizontal axis represents OFDM symbol index l sym and the vertical axis is the subcarrier index k a sc where k a scindicates a subcarrier index in the VRB area. Each block shown in FIG. 6 indicates a resource element. In the symbol mapping to the VRB in step B6, the complex-valued symbol sequence z (p) The column vector [z (0) (g), z (1) (g),···z (p) (g),···,z (P-1) (g)] T may be mapped to one of the resource elements included in the VRB allocated for the PUSCH. (p) Column vector z[z (0) (g), z (1) (g),···z (p) (g),···,z (P-1) (g)] T is the subcarrier index k a sc It may be mapped to resource elements based on priority.

[0203] In step B7, mapping from VRBs to PRBs may be performed. After the VRBs are mapped to PRBs, the subcarrier index k sc OFDM symbol index l sym The complex-valued symbol sequence z mapped to (p) Column vector z[z (0) (g), z (1) (g),···z (p) (g),···,z (P-1) (g)] T is a(k sc ,l sym ) where a(k sc ,l sym ) is the subcarrier index k sc OFDM symbol index l sym This is also called the content (or value) of the

[0204] In step B8, subcarrier index k scOFDM symbol index l sym Contents of a(k sc ,l sym ) based on at least the baseband signal s lsym The baseband signal generation in step B8 may generate the content a(k sc ,l sym ) corresponds to the IFFT (Inverse Fast Fourier Transform) for

[0205] The baseband signal s generated in step B8 lsym (t) may be input to the RF unit 12. In the RF unit 12, the signal power may be amplified by a power amplifier and transmitted from the antenna unit 11.

[0206] The base station apparatus 3 receives the PUSCH transmitted from the terminal apparatus 1. The physical layer processing unit 30 may attempt to detect one or both of the transport block 5011 and the transport block 5012 delivered by the PUSCH.

[0207] Here, when a PTRS is multiplexed onto a PUSCH, the terminal device 1 needs to determine the mapping of the time domain of the PTRS. Conventionally, the mapping of the time domain of the PTRS is determined based on the MCS value associated with the PUSCH. However, in one aspect of the present embodiment, two MCS values ​​may be associated with the PUSCH.

[0208] For example, the physical layer processing unit 10 may use both the MCS value associated with transport block 5011 and the MCS value associated with transport block 5012 to determine the time domain mapping of the PTRS to be mapped to PUSCH 5010.

[0209] For example, the physical layer processing unit 10 may identify the maximum value between the MCS value associated with transport block 5011 and the MCS value associated with transport block 5012 in order to determine the time domain mapping of the PTRS to be mapped to PUSCH 5010. Furthermore, the physical layer processing unit 10 may determine the time domain mapping of the PTRS to be mapped to PUSCH 5010 based on the identified maximum MCS value.

[0210] For example, when specifying the maximum value, if the MCS value associated with transport block 5011 is of a first MCS type and the MCS value associated with transport block 5012 is of a second MCS type, physical layer processing unit 10 may specify the maximum value on the assumption that the MCS value associated with transport block 5012 is the MCS value for the initial transmission of transport block 5012. Here, the first MCS type is an MCS type in which the MCS value is associated with a modulation scheme and a target coding rate. Also, the second MCS type is an MCS type in which the MCS value is associated with a modulation scheme but is not associated with a target coding rate.

[0211] For example, in identifying the maximum value, if either the MCS value associated with transport block 5011 or the MCS value associated with transport block 5012 is of the second MCS type, physical layer processing unit 10 may identify an MCS value that is not of the second MCS type. Furthermore, physical layer processing unit 10 may determine the time domain mapping of the PTRS to be mapped to PUSCH 5010 based on the identified MCS value.

[0212] For example, when determining the maximum value, if both the MCS value associated with transport block 5011 and the MCS value associated with transport block 5012 are of the second MCS type, the physical layer processing unit 10 may determine the maximum value based on the assumption that the MCS value associated with transport block 5011 is the MCS value for the initial transmission of transport block 5011, and the MCS value associated with transport block 5012 is the MCS value for the initial transmission of transport block 5012.

[0213] For example, if the MCS value associated with transport block 5011 and the MCS value associated with transport block 5012 are both of the second MCS type, a pre-configured time domain mapping of the PTRS may be used, where the pre-configured time domain mapping of the PTRS may be provided by the RRC layer.

[0214] For example, the physical layer processing unit 10 may identify the minimum value between the MCS value associated with transport block 5011 and the MCS value associated with transport block 5012 in order to determine the time domain mapping of the PTRS to be mapped to PUSCH 5010. Furthermore, the physical layer processing unit 10 may determine the time domain mapping of the PTRS to be mapped to PUSCH 5010 based on the identified maximum MCS value.

[0215] For example, when determining the minimum value, if the MCS value associated with transport block 5011 is of a first MCS type and the MCS value associated with transport block 5012 is of a second MCS type, the physical layer processing unit 10 may determine the minimum value based on the assumption that the MCS value associated with transport block 5012 is the MCS value for the initial transmission of transport block 5012.

[0216] For example, in identifying the minimum value, if either the MCS value associated with transport block 5011 or the MCS value associated with transport block 5012 is of the second MCS type, physical layer processing unit 10 may identify an MCS value that is not of the second MCS type. Furthermore, physical layer processing unit 10 may determine the time domain mapping of the PTRS to be mapped to PUSCH 5010 based on the identified MCS value.

[0217] For example, when determining the minimum value, if both the MCS value associated with transport block 5011 and the MCS value associated with transport block 5012 are of the second MCS type, the physical layer processing unit 10 may determine the minimum value based on the assumption that the MCS value associated with transport block 5011 is the MCS value for the initial transmission of transport block 5011, and the MCS value associated with transport block 5012 is the MCS value for the initial transmission of transport block 5012.

[0218] For example, the physical layer processing unit 10 may identify an MCS value associated with the transport block 5011 to determine the time domain mapping of the PTRS to be mapped to the PUSCH 5010. The physical layer processing unit 10 may also determine the time domain mapping of the PTRS to be mapped to the PUSCH 5010 based on the identified MCS value. Here, the physical layer processing unit 10 may not use an MCS value associated with the transport block 5012 to determine the time domain mapping of the PTRS to be mapped to the PUSCH 5010.

[0219] For example, when determining the MCS value, if the MCS value associated with transport block 5012 is of a first MCS type and the MCS value associated with transport block 5011 is of a second MCS type, the physical layer processing unit 10 may determine the MCS value based on the assumption that the MCS value associated with transport block 5011 is the MCS value for the initial transmission of transport block 5011.

[0220] For example, when identifying the MCS value, if the MCS value associated with transport block 5012 is of a first MCS type and the MCS value associated with transport block 5011 is of a second MCS type, physical layer processing unit 10 may identify the MCS value associated with transport block 5012.

[0221] For example, the physical layer processing unit 10 may be notified by the base station device 3 of information indicating whether an MCS value associated with transport block 5011 is used to determine the time domain mapping of the PTRS to be mapped to PUSCH 5010. If the information does not indicate that the MCS value associated with transport block 5011 is used to determine the time domain mapping of the PTRS to be mapped to PUSCH 5010, the physical layer processing unit 10 may use the MCS value associated with transport block 5012 to determine the time domain mapping of the PTRS to be mapped to PUSCH 5010. Here, the information may be determined based on DCI format 5001. Alternatively, the information may be indicated by DCI format 5001. Alternatively, the information may be determined based on parameters provided by the RRC layer. Alternatively, the information may be indicated by parameters provided by the RRC layer.

[0222] For example, the physical layer processing unit 10 may compare the number of layers to which a codeword corresponding to transport block 5011 is mapped with the number of layers to which a codeword corresponding to transport block 5012 is mapped in order to determine the time domain mapping of the PTRS to be mapped to PUSCH 5010.

[0223] For example, the physical layer processing unit 10 may identify the maximum value between the number of layers to which a codeword corresponding to transport block 5011 is mapped and the number of layers to which a codeword corresponding to transport block 5012 is mapped in order to determine the time domain mapping of the PTRS to be mapped to PUSCH 5010. Furthermore, the physical layer processing unit 10 may identify the transport block corresponding to the identified maximum value, and determine the time domain mapping of the PTRS to be mapped to PUSCH 5010 based on the value of the MCS associated with the identified transport block.

[0224] For example, if the MCS value associated with transport block 5011 is a first MCS type and the MCS value associated with transport block 5012 is a second MCS type, the physical layer processing unit 10 may determine the time domain mapping of the PTRS to be mapped to PUSCH 5010 based on the MCS value associated with transport block 5011, rather than based on identifying the maximum value.

[0225] For example, the physical layer processing unit 10 may identify the minimum value between the number of layers to which a codeword corresponding to transport block 5011 is mapped and the number of layers to which a codeword corresponding to transport block 5012 is mapped in order to determine the time domain mapping of the PTRS to be mapped to PUSCH 5010. Furthermore, the physical layer processing unit 10 may identify a transport block corresponding to the identified maximum value, and determine the time domain mapping of the PTRS to be mapped to PUSCH 5010 based on the value of MCS associated with the identified transport block.

[0226] For example, if the MCS value associated with transport block 5011 is a first MCS type and the MCS value associated with transport block 5012 is a second MCS type, the physical layer processing unit 10 may determine the time domain mapping of the PTRS to be mapped to PUSCH 5010 based on the MCS value associated with transport block 5011, rather than based on identifying the minimum value.

[0227] Various aspects of the device according to one aspect of this embodiment will be described below.

[0228] (1) In order to achieve the above object, an aspect of the present invention employs the following means. That is, a first aspect of the present invention is a terminal device comprising: a receiver that detects a DCI format involving a first MCS field for a first transport block and a second MCS field for a second transport block; and a transmitter that transmits one or both of the first transport block and the second transport block on a PUSCH based on the DCI format, wherein the transmitter multiplexes a PTRS onto the PUSCH for transmission, and the transmitter determines a time domain allocation density of the PTRS based on a procedure using one or both of a first MCS index indicated by the first MCS field and a second MCS index indicated by the second MCS field, the procedure being any one of steps 1 to 4, and step 1 selecting a larger MCS index from the first MCS index and the second MCS index, and determining a time domain allocation density based on the selected MCS index. step 2 is a procedure for determining the time domain allocation density of the PTRS based on the MCS index of the first MCS index, step 2 is a procedure for selecting a smaller MCS index from the first and second MCS indexes, and determining the time domain allocation density of the PTRS based on the selected MCS index, step 3 is a procedure for determining the time domain allocation density of the PTRS based on the first MCS index regardless of whether transmission of the first transport block is instructed, and step 4 is a procedure for selecting the larger number of layers from a first number of layers to which a first codeword corresponding to the first transport block is mapped and a second number of layers to which a second codeword corresponding to the second transport block is mapped, and determining the time domain allocation density of the PTRS based on the MCS index corresponding to the transport block corresponding to the selected codeword.

[0229] (2) Also, in the first aspect of the present invention, when the first MCS index is included in a predetermined range of values, the transmitting unit assumes that the first MCS index is the MCS index indicated in the initial transmission of the first transport block.

[0230] (3) Also, in the first aspect of the present invention, when the first MCS index is within a predetermined value range, the transmitting unit determines the density of the time domain allocation of the PTRS based on the second MCS index.

[0231] (4) Also, in the first aspect of the present invention, when the first MCS index is within a predetermined value range, the transmitting unit determines the density of the time domain allocation of the PTRS using the MCS index indicated in the initial transmission of the first transport block.

[0232] (5) A second aspect of the present invention is a base station apparatus comprising: a transmitter that transmits a DCI format with a first MCS field for a first transport block and a second MCS field for a second transport block; and a receiver that receives a PUSCH that is transmitted based on the DCI format, the PUSCH including one or both of the first transport block and the second transport block, wherein the receiver separates a PTRS from the PUSCH, and the receiver determines a time domain allocation density of the PTRS based on a procedure that uses one or both of a first MCS index indicated by the first MCS field and a second MCS index indicated by the second MCS field, the procedure being any one of steps 1 to 4, and step 1 selecting a larger MCS index from the first MCS index and the second MCS index, and step 2 is a procedure for determining the time domain allocation density of the PTRS based on an MCS index, step 2 is a procedure for selecting a smaller MCS index from the first MCS index and the second MCS index, and determining the time domain allocation density of the PTRS based on the selected MCS index, step 3 is a procedure for determining the time domain allocation density of the PTRS based on the first MCS index regardless of whether transmission of the first transport block is indicated or not, and step 4 is a procedure for selecting the larger number of layers from a first number of layers to which a first codeword corresponding to the first transport block is mapped and a second number of layers to which a second codeword corresponding to the second transport block is mapped, and determining the time domain allocation density of the PTRS based on the MCS index corresponding to the transport block corresponding to the selected codeword.

[0233] (6) Furthermore, in the second aspect of the present invention, when the first MCS index is within a predetermined range of values, the receiving unit assumes that the first MCS index is the MCS index indicated in the initial transmission of the first transport block.

[0234] (7) Also, in the second aspect of the present invention, when the first MCS index is within a predetermined value range, the receiving unit determines the density of the time domain allocation of the PTRS based on the second MCS index.

[0235] (8) Also, in a second aspect of the present invention, when the first MCS index is within a predetermined value range, the receiving unit determines the density of the time domain allocation of the PTRS using the MCS index indicated in the initial transmission of the first transport block.

[0236] 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.

[0237] 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.

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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.

[0243] 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.

[0244] 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]

[0245] 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]

[0246] 1(1A, 1B, 1C) Terminal equipment 3 Base station equipment 9. Wireless Communication Systems 10, 30 Physical layer control unit 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 5000 PDCCH 5001 DCI format 5010 PUSCH 5011, 5012 transport blocks

Claims

1. a receiver for detecting a DCI format with a first MCS field for a first transport block and a second MCS field for a second transport block; a transmitter configured to transmit one or both of the first transport block and the second transport block on a PUSCH based on the DCI format; The transmitter multiplexes the PTRS onto the PUSCH and transmits the multiplexed PTRS; The transmitter determines a density of the time domain allocation of the PTRS based on a procedure using one or both of a first MCS index indicated by the first MCS field and a second MCS index indicated by the second MCS field; The procedure is any one of procedures 1 to 4, The procedure 1 is a procedure of selecting a larger MCS index from the first MCS index and the second MCS index, and determining a density of time domain allocation of the PTRS based on the selected MCS index; the step 2 is a step of selecting a smaller MCS index from the first MCS index and the second MCS index, and determining a density of the time domain allocation of the PTRS based on the selected MCS index; The procedure 3 is a procedure for determining a density of time domain allocation of the PTRS based on the first MCS index regardless of whether transmission of the first transport block is instructed, The procedure 4 is a procedure of selecting a first number of layers to which a first codeword corresponding to the first transport block is mapped and a second number of layers to which a second codeword corresponding to the second transport block is mapped, whichever is larger, and determining a density of allocation of the PTRS in the time domain based on an MCS index corresponding to the transport block corresponding to the selected codeword. Terminal device.

2. The transmitter assumes that the first MCS index is the MCS index indicated in the initial transmission of the first transport block if the first MCS index is within a predetermined range of values. The terminal device according to claim 1 .

3. The transmitter determines a density of the time domain allocation of the PTRS based on the second MCS index when the first MCS index is within a predetermined value range. The terminal device according to claim 1 .

4. The transmitter determines a density of a time domain allocation of a PTRS using an MCS index indicated in an initial transmission of the first transport block when the first MCS index is within a predetermined value range. The terminal device according to claim 1 .

5. a transmitter configured to transmit a DCI format with a first MCS field for a first transport block and a second MCS field for a second transport block; a receiving unit that receives a PUSCH transmitted based on the DCI format, the PUSCH including the first transport block and one or both of the second transport block; The receiving unit separates the PTRS from the PUSCH, The receiving unit determines the density of the time domain allocation of the PTRS based on a procedure using one or both of a first MCS index indicated by the first MCS field and a second MCS index indicated by the second MCS field; The procedure is any one of procedures 1 to 4, The procedure 1 is a procedure of selecting a larger MCS index from the first MCS index and the second MCS index, and determining a density of time domain allocation of the PTRS based on the selected MCS index; the step 2 is a step of selecting a smaller MCS index from the first MCS index and the second MCS index, and determining a density of the time domain allocation of the PTRS based on the selected MCS index; The procedure 3 is a procedure for determining a density of time domain allocation of the PTRS based on the first MCS index regardless of whether transmission of the first transport block is instructed, The procedure 4 is a procedure of selecting a first number of layers to which a first codeword corresponding to the first transport block is mapped and a second number of layers to which a second codeword corresponding to the second transport block is mapped, whichever is larger, and determining a density of allocation of the PTRS in the time domain based on an MCS index corresponding to the transport block corresponding to the selected codeword. Base station equipment.

6. The receiver assumes that the first MCS index is the MCS index indicated in the initial transmission of the first transport block if the first MCS index is within a predetermined range of values. The base station device according to claim 5 .

7. The receiving unit determines a density of the time domain allocation of the PTRS based on the second MCS index when the first MCS index is within a predetermined value range. The base station device according to claim 5 .

8. The receiving unit determines a density of a time domain arrangement of a PTRS using an MCS index indicated in an initial transmission of the first transport block when the first MCS index is within a predetermined value range. The base station device according to claim 5 .

9. A communication method used in a terminal device, comprising: detecting a DCI format with a first MCS field for a first transport block and a second MCS field for a second transport block; transmitting one or both of the first transport block and the second transport block on a PUSCH based on the DCI format; multiplexing the PTRS into the PUSCH and transmitting the PTRS; determining a density of the time domain arrangement of the PTRS based on a procedure using one or both of a first MCS index indicated by the first MCS field and a second MCS index indicated by the second MCS field; The procedure is any one of procedures 1 to 4, The procedure 1 is a procedure of selecting a larger MCS index from the first MCS index and the second MCS index, and determining a density of time domain allocation of the PTRS based on the selected MCS index; the step 2 is a step of selecting a smaller MCS index from the first MCS index and the second MCS index, and determining a density of the time domain allocation of the PTRS based on the selected MCS index; The procedure 3 is a procedure for determining a density of time domain allocation of the PTRS based on the first MCS index regardless of whether transmission of the first transport block is instructed, The procedure 4 is a procedure of selecting a first number of layers to which a first codeword corresponding to the first transport block is mapped and a second number of layers to which a second codeword corresponding to the second transport block is mapped, whichever is larger, and determining a density of allocation of the PTRS in the time domain based on an MCS index corresponding to the transport block corresponding to the selected codeword. Communication method.

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