WO2023032433A1

WO2023032433A1 - Terminal device, base station device, and communication method

Info

Publication number: WO2023032433A1
Application number: PCT/JP2022/025148
Authority: WO
Inventors: 友樹吉村; 翔一鈴木; 大一郎中嶋; 智造野上; 崇久福井; 渉大内; 会発林; 涼太森本
Original assignee: シャープ株式会社
Priority date: 2021-08-31
Filing date: 2022-06-23
Publication date: 2023-03-09
Also published as: JPWO2023032433A1

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

TERMINAL DEVICE, BASE STATION DEVICE, AND COMMUNICATION METHOD

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 in Japan on August 31, 2021, the content of which is incorporated herein.

Radio access schemes and radio networks for cellular mobile communications (hereafter referred to as “Long Term Evolution (LTE)” or “EUTRA: Evolved Universal Terrestrial Radio Access”) are the third generation partnership project (3GPP: 3 ^rd Generation Partnership Project). In LTE, a base station device is also called eNodeB (evolved NodeB), and a terminal device is also called UE (User Equipment). LTE is a cellular communication system in which a plurality of areas covered by base station devices are arranged in a cell. A single base station device may manage multiple serving cells.

　In 3GPP, work was carried out to formulate wireless communication standards (NR: New Radio). 3GPP is studying further expansion of wireless communication standards (Non-Patent Document 2).

One aspect of the present invention provides a terminal device that performs efficient communication and a communication method used in the terminal device.

(1) A first aspect of the present invention is a terminal device having 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 transmitting unit that transmits one or both of the first transport block and the second transport block by PUSCH based on the DCI format, the transmitting unit multiplexes the PTRS with the PUSCH and transmits the PTRS, and the transmitting unit calculates the density of allocation of the PTRS in the time domain by the first MCS index indicated by the first MCS field and the second MCS. and the second MCS index indicated by the field, and the procedure is any one of procedure 1 to procedure 4, wherein the procedure 1 is the first MCS index and the A procedure such as selecting a larger MCS index from among the second MCS indexes and determining the time domain allocation density of the PTRS based on the selected MCS index, wherein the procedure 2 is the first selecting a smaller MCS index from among the MCS index and the second MCS index, and determining the time domain allocation density of the PTRS based on the selected MCS index; A procedure for determining the time domain allocation density of the PTRS based on the first MCS index regardless of whether or not transmission of the first transport block is indicated, wherein the procedure 4 includes: 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 time domain constellation of the PTRS based on the MCS index corresponding to the transport block corresponding to the selected codeword. is.

(2) A second aspect of the present invention is a base station apparatus, DCI with a first MCS field for a first transport block and a second MCS field for a second transport block. a transmitting unit for transmitting a format; and receiving a PUSCH transmitted based on the DCI format, the PUSCH including one or both of the first transport block and the second transport block. a receiving unit, wherein the receiving unit separates the PTRS from the PUSCH, and the receiving unit calculates the time-domain constellation density of the PTRS by a first MCS index indicated by the first MCS field. and a second MCS index indicated by the second MCS field, wherein the procedure is any one of procedure 1 to procedure 4, wherein the procedure 1 is the selecting a larger MCS index from among a first MCS index and said second MCS index, and determining a time domain constellation density of said PTRS based on said selected MCS index, said procedure 2 selects a smaller MCS index from the first MCS index and the second MCS index, and determines the time-domain constellation density of the PTRS based on the selected MCS index. and the procedure 3 is a procedure for determining the density of allocation of the time domain of the PTRS based on the first MCS index regardless of whether the transmission of the first transport block is indicated. a first number of layers to which the first codeword corresponding to the first transport block is mapped, and the second codeword corresponding to the second transport block is a second number of layers to be mapped, selecting the greater number of layers, and mapping the time domain of the PTRS based on the MCS index corresponding to the transport block corresponding to the selected codeword. Procedures such as determining density.

(3) A third aspect of the present invention is a communication method used in a terminal device, comprising 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 PUSCH based on the DCI format, and transmitting the PTRS to the a step of multiplexing and transmitting on a PUSCH; and a density of allocation of the time domain of the PTRS to a first MCS index indicated by the first MCS field and a second MCS indicated by the second MCS field. and determining based on a procedure using one or both of the index and the index, wherein the procedure is any one of procedure 1 to procedure 4, wherein the procedure 1 is the first MCS index and the second MCS index. A procedure for selecting a large MCS index from among MCS indexes and determining the time domain allocation density of the PTRS based on the selected MCS index, wherein the procedure 2 includes the first MCS index and selecting a smaller MCS index from the second MCS indices, and determining the density of the PTRS time-domain allocation based on the selected MCS index, wherein the step 3 is the first is a procedure for determining the density of allocation of the time domain of the PTRS based on the first MCS index regardless of whether or not the transmission of the transport block of is instructed, and the procedure 4 is the first a first number of layers to which a first codeword corresponding to a transport block is mapped and a second number of layers to which a second codeword corresponding to said second transport block is mapped; , and determines the density of the time domain arrangement of the PTRS based on the MCS index corresponding to the transport block corresponding to the selected codeword.

According to one aspect of the present invention, the terminal device can communicate efficiently.

1 is a conceptual diagram of a wireless communication system 9 according to one aspect of the present embodiment; FIG. It is a figure which shows the structural example of the resource grid which concerns on one aspect|mode of this embodiment. 1 is a schematic block diagram showing a configuration example of a base station device 3 according to one aspect of the present embodiment; FIG. 1 is a schematic block diagram showing a configuration example of a terminal device 1 according to one aspect of the present embodiment; FIG. FIG. 4 is a diagram illustrating an example of a PUSCH scheduling method according to an aspect of the present embodiment; FIG. 4 is a diagram illustrating an example of symbol mapping to VRBs according to an aspect of the present embodiment;

Embodiments of the present invention will be described below.

　floor(C) may be a floor function for the real number C. For example, floor(C) may be a function that outputs the largest integer that does not exceed the real number C. ceil(D) may be the ceiling function for real D. For example, ceil(D) may be a function that outputs the smallest integer in the range not less than the real number D. mod(E,F) may be a function that outputs the remainder of dividing E by F. mod(E,F) may be a function that outputs a value corresponding to the remainder of E divided by F. exp(G)=e^G. where e is the Napier number. ĤI indicates H raised to the I power. max(J,K) is a function that outputs the maximum 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.

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, as a general term for the terminal devices 1A to 1C, a terminal device that communicates with the base station device 3 will also be referred to as a terminal device 1 (UE#1: User Equipment#1).

In the wireless communication system 9, the terminal device 1 and the base station device 3 may use one or more communication schemes. For example, in the downlink of the radio communication system 9, CP-OFDM (Cyclic Prefix--Orthogonal Frequency Division Multiplex) may be used. Also, in the uplink of the radio communication system 9, either CP-OFDM or DFT-s-OFDM (Discrete Fourier Transform--spread--Orthogonal Frequency Division Multiplex) may be used. Here, DFT-s-OFDM is a communication scheme in which transform precoding is applied prior to signal generation in CP-OFDM. Here, modified precoding is also called DFT precoding.

As shown in FIG. 1, the base station device 3 may be configured by one transmitting/receiving device (or transmitting point, transmitting device, receiving point, receiving device, transmitting/receiving point). On the other hand, in some cases, the base station apparatus 3 may be configured including a plurality of transceivers. When the base station device 3 is composed of a plurality of transmitting/receiving devices, each of the plurality of transmitting/receiving devices may be arranged at geographically different positions.

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, the serving cell is also called a cell.

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

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

Resources in the wireless communication system 9 may be managed by a resource grid using subcarrier indices and OFDM symbol indices.

A subcarrier spacing (SCS: SubCarrier Spacing) Δf for a given subcarrier spacing setting μ may be Δf=2 ^μ ·15 kHz. For example, the subcarrier spacing setting μ may indicate any of 0, 1, 2, 3, or 4.

The time unit T _c =1/(Δf _max ·N _f ) may be used for representing the length of the time domain. Here, Δf _max =480 kHz may be used. Alternatively, N _f =4096. Alternatively, the constant κ may be κ=Δf _max ·N _f /(Δf _ref ·N _f,ref )=64. Also, Δf _ref may be 15 kHz. N _f,ref is 2048.

The transmission of downlink/uplink signals may be organized into radio frames (system frames, frames) of length _Tf . Here, T _f =(Δf _max ·N _f /100)·T _s =10 ms.

A radio frame may consist of 10 subframes. Here, the length of the subframe may be T _sf =(Δf _max ·N _f /1000)·T _s =1 ms. Also, the number of OFDM symbols per subframe may be N ^{subframe, μ} _symb =N ^slot _symb ·N ^{subframe, μ} _slot .

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

A slot may consist of multiple OFDM symbols. For example, one slot may be composed of consecutive N ^slot _symb OFDM symbols. For example, in normal CP setting, N ^slot _symb =14 may be used. Also, in setting the extended CP, N ^slot _symb =12 may be used.

Slots may be indexed in the time domain. For example, the slot index n ^μ _s may be given in ascending order by integer values ranging from 0 to N ^{subframe, μ} _slot −1 in subframes. Also, the slot indices n ^μ _s,f may be given in ascending order by integer values ranging from 0 to N ^frame,μ _slot −1 in the radio frame.

FIG. 2 is a diagram illustrating a configuration example of a resource grid according to one aspect of the present embodiment. In the resource grid of FIG. 2, the horizontal axis is the OFDM symbol index l _sym and the vertical axis is the subcarrier index k _sc . The resource grid of FIG. 2 includes N ^{size, μ} _{grid, x} ·N ^RB _sc subcarriers and N ^{subframe, μ} _symb OFDM symbols. where N ^{size, μ} _{grid, x} denotes the bandwidth of the SCS specific carrier. Also, the unit of the value of N ^{size, μ} _{grid, x} is a resource block.

Within the resource grid, a resource identified by subcarrier index k _sc and OFDM symbol index l _sym is also called a resource element (RE).

A resource block (RB) includes N ^RB _sc consecutive subcarriers. A resource block is a general term for a common resource block, a physical resource block (PRB), and a virtual resource block (VRB). For example, N ^RB _sc =12.

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

Antenna ports may be defined by the fact that the channel over which symbols at one antenna port are conveyed can be estimated from the channels over which other symbols at that antenna port are conveyed. 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. A symbol may also correspond to a modulation symbol that is placed on a resource element. Here, "channel" may mean "propagation path". Also, "channel" may mean "physical channel".

Two antenna ports are Quasi Co-Located (QCL) if the large scale property of the channel over which the symbols are conveyed at one antenna port can be estimated from the channel over which the symbols are conveyed at the other antenna port. ) are considered to be in a relationship. Here, the large-scale characteristics may include long-term characteristics of the channel. Large-scale properties are delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters. You may include a part or all. A first antenna port and a second antenna port are QCL with respect to beam parameters if the receive beam expected by the receiver for the first antenna port and the receive beam expected by the receiver for the second antenna port and may be the same (or correspond). A first antenna port and a second antenna port are QCL with respect to beam parameters if the transmit beam expected by the receiver for the first antenna port and the transmit beam expected by the receiver for the second antenna port and may be the same (or correspond). The terminal device 1 assumes that the two antenna ports are QCL when the large-scale characteristics of the channel through which the symbols are transmitted at one antenna port can be estimated from the channel through which the symbols are transmitted at another antenna port. may be Two antenna ports being QCL may be assumed to be two antenna ports being QCL.

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

FIG. 3 is a schematic block diagram showing a configuration example of the 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 transmitting/receiving unit) 30 and/or a part or all of a higher layer processing unit 34 . The physical layer processing unit 30 includes part or all of an antenna unit 31 , an RF (Radio Frequency) processing unit 32 , and a baseband processing unit 33 . The upper layer processing unit 34 includes part or all of a medium access control layer (MAC layer) processing unit 35 and a radio resource control (RRC: Radio Resource Control) layer processing unit 36 .

The physical layer processing unit 30 performs physical layer processing. Here, the processing of the physical layer includes generation of baseband signals for physical channels, generation of baseband signals for physical signals, detection of information transmitted from physical channels, and detection of information transmitted by physical signals. It may include part or all. The physical layer processing may also include the mapping of transport channels to physical channels. Here, the baseband signal is also called a time-continuous signal.

For example, the physical layer processing unit 30 may generate a baseband signal of a downlink physical channel. Here, transport blocks delivered from higher layers on the DL-SCH may be arranged in downlink physical channels.

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

For example, the physical layer processing unit 30 may attempt to detect information conveyed by the uplink physical channel. Here, the transport blocks among the information carried by the uplink physical channel may be delivered to higher layers on the UL-SCH.

For example, the physical layer processing unit 30 may attempt to detect information transmitted by an uplink physical signal.

The upper layer processing unit 34 performs part or all of the processing of the MAC (Medium Access Control) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the RRC layer. do Here, the MAC layer is also called MAC sublayer. A PDCP layer is also referred to as a PDCP sublayer. RLC layers are also referred to as RLC sublayers. The RRC layer is also referred to as the RRC sublayer.

The medium access control layer processing unit (MAC layer processing unit) 35 performs MAC layer processing. Here, MAC layer processing includes mapping between logical channels and transport channels, multiplexing of one or more MAC SDUs (Service Data Units) into transport blocks, and delivery from the physical layer on UL-SCH. It may include some or all of the decomposition of a transport block into one or more MAC SDUs, the application of HARQ (Hybrid Automatic Repeat reQuest) to the transport block, and the processing of scheduling requests.

The radio resource control layer processing unit 36 performs RRC layer processing. RRC layer processing may include some or all of broadcast signaling management, RRC connection/RRC idle state management, and RRC reconfiguration.

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 an RRC parameter in an RRC message on a certain logical channel and transmit the RRC parameter to the terminal device 1 . Here, the RRC message may be mapped to any of BCCH (Broadcast Control CHannel), CCCH (Common Control CHannel), and DCCH (Dedicated Control CHannel).

The radio resource control layer processing unit 36 may determine the 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 relate to the capability information report of the terminal device 1 .

The physical layer processing unit 30 may perform part or all of modulation processing, encoding processing, and transmission processing. The physical layer processing unit 30 may generate a physical signal based on part or all of the encoding processing, modulation processing, and baseband signal generation processing for transport blocks. The physical layer processing unit 30 may place physical signals in a certain BWP. The physical layer processing unit 30 may transmit the generated physical signal.

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

In the band of the serving cell, if implementation of carrier sense is required, the physical layer processing unit 30 may implement carrier sense prior to transmission of the physical signal.

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 section 32 outputs the baseband signal to the baseband section 33 .

The baseband section 33 may digitize the baseband signal input from the RF section 32 . The baseband unit 33 may remove a portion corresponding to CP (Cyclic Prefix) from the digitized baseband signal. The baseband unit 33 may perform a fast Fourier transform (FFT) on the CP-removed baseband signal to extract a signal in the frequency domain.

The baseband unit 33 may generate a baseband signal by inverse fast Fourier transform (IFFT) of the physical signal. The baseband unit 33 may add a CP to the generated baseband signal. The baseband unit 33 may analogize the baseband signal to which the CP is added. The baseband section 33 may output the analogized baseband signal to the RF section 32 .

The RF section 32 may remove extra frequency components from the baseband signal input from the baseband section 33 . RF section 32 may upconvert the baseband signal to a carrier frequency to generate an RF signal. The RF section 32 may transmit RF signals via the antenna section 31 . Also, the RF unit 32 may have a function of controlling transmission power.

One or more serving cells (or component carriers, downlink component carriers, or uplink component carriers) may be configured for the terminal device 1 .

Each of the serving cells configured for the terminal device 1 is either PCell (Primary cell, primary cell), PSCell (Primary SCG cell, primary SCG cell), and SCell (Secondary Cell, secondary cell) good too.

A PCell is a serving cell included in an MCG (Master Cell Group). The PCell is a cell (implemented cell) in which the terminal device 1 implements an initial connection establishment procedure or a connection re-establishment procedure.

A PSCell is a serving cell included in an SCG (Secondary Cell Group). A PSCell is a serving cell in which a random access procedure is performed by the terminal device 1 .

SCell may be included in either MCG or SCG.

A serving cell group (cell group) is a generic term for MCG, SCG, and PUCCH cell groups. 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.

　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 .

Among one or more downlink BWPs configured for the terminal device 1, one downlink BWP may be configured as an active downlink BWP (or one downlink BWP may be activated). . Among one or more uplink BWPs configured for the terminal device 1, one uplink BWP may be configured as an active uplink BWP (or one uplink BWP may be activated). .

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

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

Downlink BWP switching (BWP switch) is a procedure for deactivating one active downlink BWP of a serving cell and activating any of the inactive downlink BWPs of the serving cell. be. Downlink BWP switching may be controlled by any of the physical layer, the MAC layer, and the RRC layer.

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

Of the one or more downlink BWPs set for the terminal device 1, two or more downlink BWPs may not be set as active downlink BWPs. For a given component carrier, one downlink BWP may be active at a given time.

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

One downlink BWP may be set as the active BWP for each downlink component carrier. That is, two or more downlink BWPs may not be set as active downlink BWPs for a certain downlink component carrier.

One uplink BWP may be set as the active BWP for each uplink component carrier. That is, two or more uplink BWPs may not be set as active uplink BWPs for a certain uplink component carrier.

FIG. 4 is a schematic block diagram showing a configuration example of the 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 section (radio transmitting/receiving section) 10 and part or all of an upper layer processing section 14 . The radio transmitting/receiving section 10 includes part or all of an antenna section 11 , an RF section 12 and a baseband section 13 . The upper layer processing unit 14 includes part or all of the medium access control layer processing unit 15 and the radio resource control layer processing unit 16 .

The physical layer processing unit 10 performs physical layer processing.

For example, the physical layer processing unit 10 may generate baseband signals for uplink physical channels. Here, transport blocks delivered from higher layers on the UL-SCH may be arranged in uplink physical channels.

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

For example, the physical layer processing unit 10 may attempt to detect information transmitted by the downlink physical channel. Here, the transport blocks among the information carried by the downlink physical channel may be delivered to higher layers on the DL-SCH.

For example, the physical layer processing unit 10 may attempt to detect information transmitted by downlink physical signals.

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

The medium access control layer processing unit (MAC layer processing unit) 15 performs MAC layer processing.

The radio resource control layer processing unit 16 performs RRC layer processing.

The radio resource control layer processing unit 16 may manage the 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 the storage area of the terminal device 1 . The RRC parameters set in the storage area of the terminal device 1 may be provided to lower layers.

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

The physical layer processing unit 10 may perform part or all of modulation processing, encoding processing, and transmission processing. The physical layer processing unit 10 may generate a physical signal based on part or all of the encoding processing, modulation processing, and baseband signal generation processing for transport blocks. The physical layer processing unit 10 may place physical signals in a certain BWP. The physical layer processing unit 10 may transmit the generated physical signal.

The physical layer processing unit 10 may perform one or both of demodulation processing and decoding processing. The physical layer processing unit 10 may deliver the transport block of the information detected based on the demodulation processing and decoding processing for the received physical signal to the upper layer on the DL-SCH.

In the band of the serving cell, if implementation of carrier sense is required, the physical layer processing unit 10 may implement carrier sense prior to transmission of the physical signal.

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

The baseband section 13 may digitize the baseband signal input from the RF section 12 . The baseband unit 13 may remove a portion corresponding to CP (Cyclic Prefix) from the digitized baseband signal. The baseband unit 13 may perform a fast Fourier transform (FFT) on the CP-removed baseband signal to extract a signal in the frequency domain.

The baseband unit 13 may generate a baseband signal by inverse fast Fourier transform (IFFT) of the physical signal. The baseband unit 13 may add a CP to the generated baseband signal. The baseband unit 13 may analogize the baseband signal to which the CP is added. The baseband section 13 may output an analogized baseband signal to the RF section 12 .

The RF section 12 may remove extra frequency components from the baseband signal input from the baseband section 13 . RF section 12 may upconvert the baseband signal to a carrier frequency to generate an RF signal. The RF section 12 may transmit RF signals via the antenna section 31 . Also, the RF unit 12 may have a function of controlling transmission power.

The physical signal will be explained below.

A physical signal is a general term for a downlink physical channel, a downlink physical signal, an uplink physical channel, and an uplink physical channel. A physical channel is a general term for a downlink physical channel and an uplink physical channel. A physical signal is a general term for a downlink physical signal and an uplink physical signal.

An uplink physical channel may correspond to a set of resource elements that convey information originating in higher layers. An uplink physical channel may be a physical channel used in an uplink component carrier. An uplink physical channel may be transmitted by the physical layer processing unit 10 . An uplink physical channel may be received by the physical layer processing unit 30 . In the uplink of the radio 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)

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

Uplink control information (uplink control information bit, uplink control information sequence, uplink control information type) includes channel state information (CSI: Channel State Information), scheduling request (SR: Scheduling Request), HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) contains some or all of the information.

　Channel state information is also called a channel state information bit or a channel state information sequence. A scheduling request is also called a scheduling request bit or a scheduling request sequence. The HARQ-ACK information is also called HARQ-ACK information bits or HARQ-ACK information sequence.

The HARQ-ACK information may consist of HARQ-ACK bits corresponding to a transport block (TB). Certain HARQ-ACK bits may indicate ACK (acknowledgement) or NACK (negative-acknowledgement) corresponding to the transport block. The ACK may indicate that decoding of the transport block has been successfully completed (has been decoded). A NACK may indicate that decoding of the transport block has not been successfully completed (has not been decoded). The HARQ-ACK information may include one or more HARQ-ACK bits.

HARQ-ACK for transport blocks is also called HARQ-ACK for PDSCH. Here, "HARQ-ACK for PDSCH" indicates HARQ-ACK for transport blocks included in PDSCH.

A scheduling request may be used to request UL-SCH resources for a new transmission. The scheduling request bit may be used to indicate either positive SR or negative SR. A scheduling request bit indicating a positive SR is also referred to as a "positive SR signaled". A positive SR may indicate that UL-SCH resources for initial transmission are requested by the medium access control layer processing unit 15 . The Scheduling Request bit indicating negative SR is also referred to as "negative SR is sent". A negative SR may indicate that no UL-SCH resources are requested for the initial transmission by the medium access control layer processing unit 15 .

The channel state information may include some or all of a channel quality indicator (CQI: Channel Quality Indicator), a precoder matrix indicator (PMI: Precoder Matrix Indicator), and a rank indicator (RI: Rank Indicator). CQI is an index related to channel quality (eg, propagation strength) or physical channel quality, and PMI is an index related to a precoder. RI is an index related to transmission rank (or number of transmission layers).

The channel state information is an index regarding the reception state of physical signals (eg, CSI-RS) used for channel measurement. The value of the channel state information may be determined by the terminal device 1 based on reception conditions assumed by the physical signals used for channel measurements. Channel measurements may include interference measurements.

A PUCCH may be accompanied by a certain PUCCH format. Here, the PUCCH format may be a form of processing of the physical layer of PUCCH. Also, the PUCCH format may be the format of information transmitted using the PUCCH.

The PUSCH may be transmitted to convey one or both of uplink control information and transport blocks. PUSCH may be used to convey uplink control information and/or transport blocks. The terminal device 1 may transmit PUSCH on which one or both of the uplink control information and the transport block are arranged. The base station device 3 may receive the PUSCH on which one or both of the uplink control information and transport blocks are arranged.

The PRACH may be sent to convey the random access preamble index. The terminal device 1 may transmit the PRACH. The base station device 3 may receive the PRACH. The terminal device 1 may transmit a random access preamble on the PRACH. The base station apparatus 3 may receive random access preambles on the PRACH.

An uplink physical signal may correspond to a set of resource elements. Uplink physical signals may not be used to convey information originating in higher layers. Note that the uplink physical signal may be used to convey 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 an uplink physical signal. The physical layer processing unit 30 may receive an uplink physical signal. Some or all of the following uplink physical signals may be used in the uplink of the radio communication system according to one aspect of the present embodiment.
・UL DMRS (Uplink Demodulation Reference Signal)
・SRS (Sounding Reference Signal)
・UL PTRS (Uplink Phase Tracking Reference Signal)

UL DMRS is a generic term for DMRS for PUSCH and DMRS for PUCCH.

A set of antenna ports for DMRS for PUSCH (DMRS related to PUSCH, DMRS included in PUSCH, DMRS corresponding to PUSCH) may be given based on the set of antenna ports for the PUSCH. For example, the set of DMRS antenna ports for the PUSCH may be the same as the set of antenna ports for the PUSCH.

The PUSCH propagation path may be estimated from the DMRS for the PUSCH.

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.

The PUCCH propagation path may be estimated from the DMRS for the PUCCH.

A downlink physical channel may correspond to a set of resource elements that convey information originating in higher layers. A downlink physical channel may be a physical channel used in a downlink component carrier. The physical layer processing unit 30 may transmit downlink physical channels. The physical layer processing unit 10 may receive downlink physical channels. Some or all of the following downlink physical channels may be used in the downlink of the radio communication system according to one aspect of the present embodiment.
・PBCH (Physical Broadcast Channel)
・PDCCH (Physical Downlink Control Channel)
・PDSCH (Physical Downlink Shared Channel)

The PBCH may be transmitted to convey one or both of the MIB (MIB: Master Information Block) and physical layer control information. Here, the physical layer control information is information generated in the physical layer. The MIB is an RRC message delivered from a higher layer on BCCH (Broadcast Control CHannel).

The PDCCH may be transmitted to convey downlink control information (DCI: Downlink Control Information). Downlink control information may be placed in the PDCCH. The terminal device 1 may receive the PDCCH in which the downlink control information is arranged. The base station apparatus 3 may transmit PDCCH in which downlink control information is arranged.

The downlink control information may be transmitted with the DCI format. Note that the DCI format may be interpreted as a format of downlink control information. A DCI format may also be interpreted as a set of downlink control information set to a certain downlink control information format.

The base station device 3 may notify the terminal device 1 of the downlink control information using the PDCCH with the DCI format. Here, the terminal device 1 may monitor the PDCCH to acquire downlink control information. Note that the DCI format and downlink control information may be described as being equivalent unless otherwise specified. For example, the base station apparatus 3 may include the downlink control information in the DCI format and transmit it to the terminal apparatus 1 . Also, the terminal device 1 may control the physical layer processing unit 10 using downlink control information included in the detected DCI format.

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. A downlink DCI format is a general term for DCI format 1_0 and DCI format 1_1.

DCI format 0_0 is used for scheduling of PUSCH allocated in a certain cell. DCI format 0_0 may include some or all of the fields 1A through 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 (MCS field: Modulation and Coding Scheme field)

The DCI format specific field may indicate whether the DCI format including the DCI format specific field is an uplink DCI format or a downlink DCI format. That is, the DCI format specific field may be included in each of the uplink DCI format and the downlink DCI format. Here, the DCI format specific field included in DCI format 0_0 may indicate 0.

The frequency domain resource allocation field included in DCI format 0_0 may be used to indicate frequency resource allocation for PUSCH scheduled by this DCI format 0_0.

The time domain resource allocation field included in DCI format 0_0 may be used to indicate time resource allocation for PUSCH scheduled by this DCI format 0_0.

A frequency hopping flag field may be used to indicate whether frequency hopping is applied to the PUSCH scheduled by this DCI format 0_0.

The MCS field included in DCI format 0_0 is used to indicate one or both of the modulation scheme for PUSCH scheduled by DCI format 0_0 and the target coding rate scheduled by DCI format 0_1. good too. The target code rate may be the target code rate for transport blocks placed on PUSCH. The transport block size (TBS: Transport Block Size) allocated to the PUSCH may be determined based on part or all of the target coding rate and the modulation scheme for the PUSCH.

DCI format 0_0 may not include fields used for CSI requests (CSI requests).

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 according to DCI format 0_0 is allocated may be the same as the serving cell of the downlink component carrier on which the PDCCH including DCI format 0_0 is allocated. Based on detecting DCI format 0_0 in a certain downlink component carrier of a certain serving cell, the terminal device 1 recognizes that the PUSCH scheduled according to the DCI format 0_0 is mapped to the uplink component carrier of the certain serving cell. good too.

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

DCI format 0_1 is used for scheduling of PUSCH allocated in a certain cell. DCI format 0_1 is configured to include part or all of fields 2A to 2H.
2A) DCI format identification field 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

The DCI format specific field included in DCI format 0_1 may indicate 0.

The frequency domain resource allocation field included in DCI format 0_1 may be used to indicate frequency resource allocation for PUSCH scheduled by this DCI format 0_1.

The time domain resource allocation field included in DCI format 0_1 may be used to indicate time resource allocation for PUSCH scheduled by this DCI format 0_1.

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

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

A DCI format 0_1 that does not include a BWP field may be a DCI format that schedules PUSCH without changing the active uplink BWP. The terminal device 1 transmits the PUSCH without switching the active uplink BWP based on detecting the DCI format 0_1 that is used for scheduling the PUSCH and does not include the BWP field. can recognize that.

Although the BWP field is included in DCI format 0_1, the BWP field may be ignored by the terminal device 1 if the terminal device 1 does not support the function of switching BWP by DCI format 0_1. That is, the terminal device 1 that does not support the BWP switching function switches the active uplink BWP based on detecting the DCI format 0_1 used for PUSCH scheduling and the DCI format 0_1 including the BWP field. It may be recognized that the PUSCH is transmitted without performing Here, if the BWP switching function is supported, the radio resource control layer processing unit 16 may include function information indicating that the BWP switching function is supported in the RRC message.

The CSI request field may be used to indicate CSI reporting.

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 PUSCH is arranged. Based on detecting DCI format 0_1 in the downlink component carrier of a certain serving cell, the terminal device 1 detects the uplink of the serving cell in which the PUSCH scheduled by the DCI format 0_1 is indicated by the carrier indicator field included in the DCI format 0_1. It may be recognized that it is located on a component carrier.

If the carrier indicator field is not included in DCI format 0_1, the serving cell to which the uplink component carrier on which the PUSCH scheduled by DCI format 0_1 is assigned belongs to the downlink component carrier on which the PDCCH including the DCI format 0_1 is assigned. It may be the same as the serving cell. Based on detecting DCI format 0_1 in a certain downlink component carrier of a certain serving cell, the terminal device 1 recognizes that the PUSCH scheduled according to the DCI format 0_1 is mapped to the uplink component carrier of the certain serving cell. good too.

DCI format 1_0 is used for scheduling of PDSCH allocated in a certain cell. DCI format 1_0 includes part or all of 3A to 3F.
3A) DCI format specific field 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

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

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

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

The MCS field included in DCI format 1_0 is used to indicate one or both of the modulation scheme for PDSCH scheduled by this DCI format and the target coding rate for PDSCH scheduled by this DCI format. may be The target code rate may be the target code rate for transport blocks placed on the PDSCH. The size of the transport block (TBS: Transport Block Size) arranged in the PDSCH may be determined based on one or both of the target coding rate and the modulation scheme for the PDSCH.

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

The PUCCH resource indication field may be used to indicate PUCCH resources.

DCI format 1_0 may not include a carrier indicator field. That is, the downlink component carrier on which the PDSCH scheduled by the DCI format 1_0 is arranged may be the same as the downlink component carrier on which the PDCCH including the DCI format 1_0 is arranged. Based on detecting DCI format 1_0 in a certain downlink component carrier, the terminal device 1 may recognize that the PDSCH scheduled by this DCI format 1_0 is arranged in this downlink component carrier.

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

DCI format 1_1 is used for scheduling of PDSCH allocated in a certain cell. DCI format 1_1 includes part or all of 4A to 4I.
4A) DCI format specific field 4B) Frequency domain resource allocation field 4C) Time domain resource allocation field 4E) MCS field 4F) PDSCH_HARQ feedback timing indication field 4G) PUCCH resource indication field 4H) BWP field 4I) Carrier indicator field

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

The frequency domain resource allocation field included in DCI format 1_1 may be used to indicate frequency resource allocation for the PDSCH scheduled by this DCI format 1_1.

The time domain resource allocation field included in DCI format 1_1 may be used to indicate time resource allocation for the PDSCH scheduled by this DCI format 1_1.

Because the MCS field included in the DCI format 1_1 indicates one or both of the modulation scheme for the PDSCH scheduled by the DCI format 1_1 and the target coding rate for the PDSCH scheduled by the DCI format 1_1. may be used for

When the PDSCH_HARQ feedback timing indication field is included in DCI format 1_1, the PDSCH_HARQ feedback timing indication field indicates the offset from the slot including the last OFDM symbol of PDSCH to the slot including the first OFDM symbol of PUCCH. may be used for If the PDSCH_HARQ feedback timing indication field is not included in DCI format 1_1, a parameter indicating the offset from the slot including the last OFDM symbol of PDSCH to the slot including the first OFDM symbol of PUCCH is provided by the RRC layer. may

The PUCCH resource indication field may be used to indicate PUCCH resources.

The BWP field of DCI format 1_1 may be used to indicate the downlink BWP in which the PDSCH scheduled by this DCI format 1_1 is arranged. In other words, DCI format 1_1 may or may not involve changing 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 PDSCH scheduling.

A DCI format 1_1 that does not include a BWP field may be a DCI format that schedules the PDSCH without changing the active downlink BWP. The terminal device 1 receives the PDSCH without switching the active downlink BWP based on detecting the DCI format 1_1 that is used for PDSCH scheduling and does not include the BWP field. can recognize that.

Although the DCI format 1_1 includes a BWP field, the BWP field may be ignored by the terminal device 1 if the terminal device 1 does not support the function of switching the BWP according to the DCI format 1_1. That is, the terminal device 1 that does not support the BWP switching function switches the active downlink BWP based on detecting the DCI format 1_1 used for PDSCH scheduling and the DCI format 1_1 including the BWP field. It may be recognized that the PDSCH is received without performing the Here, if the BWP switching function is supported, the radio resource control layer processing unit 16 may include function information indicating that the BWP switching function is supported in the RRC message.

When the 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 in which the PDSCH scheduled by the DCI format 1_1 is arranged. Based on detecting DCI format 1_1 in a downlink component carrier of a certain serving cell, the terminal device 1 detects the downlink of the serving cell in which the PDSCH scheduled by this DCI format 1_1 is indicated by the carrier indicator field included in this DCI format 1_1. It may be recognized that it is located on a component carrier.

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

The PDSCH may be sent to convey transport blocks. PDSCH may be used to convey transport blocks. Transport blocks may be placed on the PDSCH. The base station device 3 may transmit PDSCH in which transport blocks are arranged. The terminal device 1 may receive the PDSCH in which transport blocks are arranged.

A downlink physical signal may correspond to a set of resource elements. Downlink physical signals may not be used to convey information originating in higher layers. Note that the downlink physical signal may be used to convey information generated in the physical layer. A downlink physical signal may be a physical signal used in a downlink component carrier. The physical layer processing unit 10 may transmit a downlink physical signal. The physical layer processing unit 30 may receive downlink physical signals. In the downlink of the radio communication system according to one aspect of this embodiment, at least some or all of the following downlink physical signals may be used.
・Synchronization signal (SS)
・DL DMRS (Downlink DeModulation Reference Signal)
・CSI-RS (Channel State Information-Reference Signal)
・DL PTRS (DownLink Phase Tracking Reference Signal)

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

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

A PBCH to which symbols of a PBCH in a certain antenna port are transmitted is a DMRS for the PBCH that is mapped to the slot to which the PBCH is mapped, and is included in the SS/PBCH block that includes the PBCH. of DMRS.

DL DMRS is a generic term for DMRS for PBCH, DMRS for PDSCH, and DMRS for PDCCH.

A set of antenna ports for DMRS for PDSCH (DMRS associated with PDSCH, DMRS included in PDSCH, DMRS corresponding to PDSCH) may be provided based on the set of antenna ports for the PDSCH. For example, the set of DMRS antenna ports for the PDSCH may be the same as the set of antenna ports for the PDSCH.

The PDSCH propagation path may be estimated from the DMRS for the PDSCH. If a set of resource elements in which a certain PDSCH symbol is transmitted and a set of resource elements in which a DMRS symbol for the certain PDSCH is transmitted are included in the same Precoding Resource Group (PRG) In that case, the PDSCH on which the PDSCH symbols on a given antenna port are conveyed may be estimated by the DMRS for the PDSCH.

Antenna ports for DMRS for PDCCH (DMRS related to PDCCH, DMRS included in PDCCH, DMRS corresponding to PDCCH) may be the same as antenna ports for PDCCH.

A PDCCH propagation path may be estimated from the DMRS for the PDCCH. If the same precoder is applied (assumed to be applied, applicable), the PDCCH on which the symbols for that PDCCH at a given antenna port are conveyed may be estimated by the DMRS for that PDCCH.

BCH (Broadcast CHannel), UL-SCH (Uplink-Shared CHannel), and DL-SCH (Downlink-Shared CHannel) are transport channels.

The transport layer BCH may be mapped to the physical layer PBCH. That is, transport blocks delivered from higher layers on the BCH of the transport layer may be placed on the PBCH of the physical layer. Also, the transport layer UL-SCH may be mapped to the physical layer PUSCH. That is, a transport block delivered from a higher layer on the UL-SCH of the transport layer may be placed on the PUSCH of the physical layer. Also, the transport layer DL-SCH may be mapped to the physical layer PDSCH. That is, a transport block delivered from a higher layer on the DL-SCH of the transport layer may be placed on the PDSCH of the physical layer.

The transport layer may apply HARQ (Hybrid Automatic Repeat reQuest) to transport blocks.

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

BCCH may be mapped to BCH or DL-SCH. That is, RRC messages containing MIB information may be delivered on the BCH. Also, RRC messages containing system information other than the MIB may be delivered to the DL-SCH. Also, CCCH is mapped to DL-SCH or UL-SCH. That is, RRC messages mapped to CCCH may be delivered to DL-SCH or UL-SCH. Also, DCCH may be mapped to DL-SCH or UL-SCH. That is, RRC messages mapped to DCCH may be delivered to DL-SCH or UL-SCH.

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

Hereinafter, as an example of a method of scheduling one PUSCH used for transmitting a plurality of transport blocks, a method of scheduling PUSCH used for transmitting two transport blocks will be described. It should be noted that each of the various aspects of this embodiment are not limited to scheduling one PUSCH used for the transmission of two transport blocks. For example, each of the various aspects of this embodiment may be applied to scheduling one PUSCH used for the transmission of three transport blocks.

FIG. 5 is a diagram illustrating an example of a PUSCH scheduling method according to one aspect of the present embodiment. Here, 5000 is the PDCCH. PDCCH 5000 is used for transmission of DCI format 5001 . 5010 is PUSCH scheduled by DCI format 5001 . PUSCH 5010 is used for transmission of transport block 5011 and transmission of transport block 5012 .

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

The DCI format 5001 may be used to determine the NDI (New Data Indicator) associated with the transport block 5011 and the NDI associated with the transport block 5012. For example, DCI format 5001 includes a first NDI field used to indicate the NDI associated with transport block 5011 and a second NDI field used to indicate the NDI associated with transport block 5012. may contain.

The DCI format 5001 may be used to determine the RV (Redundancy Version) associated with the transport block 5011 and the RV associated with the transport block 5012. For example, DCI format 5001 includes a first RV field used to indicate the RV associated with transport block 5011 and a second RV field used to indicate the RV associated with transport block 5012. may contain.

The DCI format 5001 may be used to determine the HPN (HARQ Process Number) associated with the transport block 5011 and the HPN associated with the transport block 5012. For example, DCI format 5001 includes a first HPN field used to indicate the HPN associated with transport block 5011 and a second HPN field used to indicate the HPN associated with transport block 5012. may contain.

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

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

The physical layer processing unit 10 may then acquire the transport block 5011 delivered on the UL-SCH. Also, the physical layer processing unit 10 may acquire the transport block 5012 delivered on the UL-SCH.

Then, the physical layer processing unit 10 may encode the transport block 5011 and the transport block 5012. Here, transport block encoding by the physical layer processing unit 10 may include some or all of the CRC attachment procedure, code block division procedure, error correction encoding procedure, rate matching procedure, and UCI multiplexing procedure.

Here, the CRC attachment procedure may be a procedure for generating a CRC sequence to be added to the transport block and attaching the generated CRC sequence to the transport block.

Also, the code block division procedure may be a procedure for dividing a transport block to which a CRC sequence is added into a plurality of code blocks. Here, when the size of the transport block to which the CRC sequence is attached exceeds a predetermined value, the transport block to which the CRC sequence is attached may be divided into a plurality of code blocks. Also, when the size of the transport block to which the CRC sequence is added does not exceed a predetermined value, the transport block itself to which the CRC sequence is added may be recognized as one code block.

Also, the error correction coding procedure may be a procedure for performing error correction coding for each code block.

Also, the rate matching procedure may be a procedure for adjusting the arrangement of coded bit sequences generated in the error correction coding procedure according to the number of bits that can be transmitted in PUSCH5010. Here, the value of RV associated with the transport block may be used for the procedure of adjusting the placement of the coded bit sequence generated in the error correction coding procedure.

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

Next, physical layer processing section 10 may generate a PUSCH baseband signal after encoding transport block 5011 and encoding transport block 5012 . Here, the generation of the PUSCH baseband signal by the physical layer processing unit 10 includes at least part or all of the procedures B1 to B8 below.
Procedure B1) Scrambling Procedure B2) Modulation processing Procedure B3) Layer mapping Procedure B4) Modified precoding Procedure B5) Precoding Procedure B6) Symbol mapping to VRB Procedure B7) Mapping from VRB to PRB Procedure B8) Baseband signal generation

Prior to performing procedure B1, the physical layer processing unit 10 may perform a procedure for 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.

In some cases, in the procedure for 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 between transport blocks and codewords is also called codeword swapping. For example, whether codeword swapping is performed may be determined based on the values of fields 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 .

The bit sequence b ^(q) of codeword #q may be the encoded sequence of the transport block mapped to the codeword #q. For example, the bit sequence b ⁽⁰⁾ of codeword #0 may be the encoded sequence of transport block 5011 . Also, the bit sequence b ⁽¹⁾ of codeword #1 may be the encoded sequence of transport block 5012 . Here, q may be a variable that indicates the codeword index (eg, 0 or 1). Here, the k-th element of the bit sequence b ^(q) of codeword #q is referred to as b ^(q) (k). where k is an integer from 0 to M ^(q) _bit −1. Also, M ^(q) _bit indicates the size of the bit sequence b ^(q) of codeword #q.

In procedure B1, the physical layer processing unit 10 may apply scrambling to the bit sequence b ^(q) of codeword #q. For example, in procedure B1, the bit sequence b ^a(q) may be generated by the calculation process b ^a(q) (k)=mod(b ^(q) (k)+c ^(q) (k), 2) good. 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. Here, the value of RNTI used for scrambling of CRC added to the DCI format used for scheduling of PUSCH may be used for initialization of bit sequence c ^(q) . The bit sequence b ^a(q) may be input to procedure B2.

If scrambling is not performed in procedure B1, the bit sequence b ^(q) , which is the input information for procedure B1, may be input to procedure B2 as b ^a(q) .

In procedure B2, a modulation process may be applied to the bit sequence ba ^(q) . A complex-valued symbol sequence d ^(q) generated by modulation processing on the bit sequence b ^a (q) may be input to procedure B3. Here, the j-th element of the complex-valued symbol sequence d ^(q) is d ^(q) (j). Also, j is an integer from 0 to M ^(q) _symb -1. Here, the types of modulation processing may include part or all of QPSK (Quardarature Phase Shift Keying), 16QAM (Quardarature Amplitude Modulation), 64QAM, 256QAM, or 1024QAM.

If modulation processing is not performed in procedure B2, the bit sequence b ^a(q) , which is the input information for procedure B2, may be input to procedure B3 as the complex-valued symbol sequence d ^(q) .

In procedure B3, layer mapping may be applied to the complex-valued symbol sequence d ^(q) . In layer mapping, a complex-valued symbol sequence d ^(q) is mapped to v complex-valued symbol sequences x ^(h) . Here, the g-th element of the h-th complex-valued symbol sequence x ^(h) is x ^(h) (g). Also, v indicates the number of PUSCH layers. Also, g represents an integer from 0 to M ^layer _symb -1. Also, M ^layer _symb indicates the number of complex-valued symbols for each complex-valued symbol sequence.

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

For example, if the number of PUSCH layers v = 2 and the number of codewords transmitted on PUSCH is C = 1, x ⁽⁰⁾ (g) = d ⁽⁰⁾ (2g) based on the relationship, A portion of the complex-valued symbol sequence d ⁽⁰⁾ for codeword #0 may be mapped to the 0th complex-valued symbol sequence x ⁽⁰⁾ . Further, when the number of PUSCH layers v = 2 and the number of codewords transmitted on PUSCH C = 1, x ⁽¹⁾ (g) = d ⁽⁰⁾ (2g + 1) based on the relationship, A portion of the complex-valued symbol sequence d ⁽⁰⁾ for codeword #0 may be mapped to the first complex-valued symbol sequence x ⁽¹⁾ .

For example, if the number of PUSCH layers v = 2 and the number of codewords transmitted on PUSCH is C = 2, based on the relationship x ⁽⁰⁾ (g) = d ⁽⁰⁾ (g), The complex-valued symbol sequence d ⁽⁰⁾ for codeword #0 may be mapped to the 0th complex-valued symbol sequence x ⁽⁰⁾ . Further, when the number of PUSCH layers v = 2 and the number of codewords transmitted on the PUSCH is C = 2, based on the relationship x ⁽¹⁾ (g) = d ⁽¹⁾ (g), The complex-valued symbol sequence d ⁽¹⁾ for codeword #1 may be mapped to the first complex-valued symbol sequence x ⁽¹⁾ .

For example, if the number of PUSCH layers v=5 and the number of codewords transmitted on PUSCH C=2, five layers may be distributed for two codewords. For example, when the number of PUSCH layers v = 5 and the number of codewords transmitted on PUSCH C = 2, based on the relationship x ⁽⁰⁾ (g) = d ⁽⁰⁾ (2g), A portion of the complex-valued symbol sequence d ⁽⁰⁾ for codeword #0 may be mapped to the 0th complex-valued symbol sequence x ⁽⁰⁾ . Further, when the number of PUSCH layers v = 5 and the number of codewords transmitted on PUSCH C = 2, based on the relationship x ⁽¹⁾ (g) = d ⁽⁰⁾ (2g + 1), A portion of the complex-valued symbol sequence d ⁽⁰⁾ for codeword #0 may be mapped to the first complex-valued symbol sequence x ⁽¹⁾ . Further, when the number of PUSCH layers is v=5 and the number of codewords transmitted by PUSCH is C=2, the relationship x ⁽²⁾ (g)=d ⁽⁰⁾ (3g) Based on this, part of the complex-valued symbol sequence d ⁽¹⁾ for codeword #1 may be mapped to the second complex-valued symbol sequence x ⁽²⁾ . Further, when the number of PUSCH layers v = 5 and the number of codewords transmitted on PUSCH is C = 2, based on the relationship x ⁽³⁾ (g) = d ⁽⁰⁾ (3g + 1), A portion of the complex-valued symbol sequence d ⁽¹⁾ for codeword #1 may be mapped to a third complex-valued symbol sequence x ⁽³⁾ . Further, when the number of PUSCH layers v = 5 and the number of codewords transmitted on PUSCH is C = 2, based on the relationship x ⁽⁴⁾ (g) = d ⁽⁰⁾ (3g + 2), A portion of the complex-valued symbol sequence d ⁽¹⁾ for codeword #1 may be mapped to a fourth complex-valued symbol sequence x ⁽⁴⁾ .

In procedure B3, for example, if v=1, no layer mapping may be applied. If layer mapping is not applied in procedure B3, the complex-valued symbol sequence d ⁽⁰⁾ , which is the input information for procedure B3, may be input to procedure B4 as the 0th complex-valued symbol sequence x ⁽⁰⁾ .

In procedure B4, modified precoding may be applied to the complex-valued symbol sequence x ^(h) . In modified precoding, a complex-valued symbol sequence x ^(h) is transformed into y ^(h) . Here, the modified precoding of procedure B4 corresponds to DFT (Discrete Fourier Transform) for the complex-valued symbol sequence x ^(h) .

If the modified precoding is not applied in procedure B4, even if the h-th complex-valued symbol x ^(h) , which is the input information to procedure B4, is input to procedure B5 as the h-th complex-valued symbol sequence y ^(h) good. For example, if the signal waveform applied to PUSCH is CP-OFDM, modified precoding may not be applied in procedure B4.

In procedure B5, precoding may be applied to the complex-valued symbol sequence y ^(h) . In 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)] By ^T , the p-th complex value An element z ^(p) (g) of the symbol sequence z ^(p ) may be generated. Here, p represents an integer from 0 to P−1. Also, P indicates the number of p-th complex-valued symbol sequences z ^(p) . P is also called the number of antenna ports. Also, W is a P×v matrix. W is also called a precoding matrix. [A, B, . . . , C] indicates a row vector including at least row vectors A, B, and C. Also, [ ] ^T indicates the transposition of the row vector.

If precoding is not applied in procedure B5, even if the h-th complex-valued symbol sequence y ^(h) , which is the input information to procedure B5, is input to procedure B6 as the p-th complex-valued symbol sequence z ^(p) good. For example, h=p. For example, if W=1 is set, no precoding may be applied in procedure B5.

FIG. 6 is a diagram illustrating an example of symbol mapping to VRBs according to an aspect of the present embodiment. In FIG. 6, the horizontal axis is the OFDM symbol index l _sym and the vertical axis is the subcarrier index k ^a _sc . Here, k ^a _sc indicates the subcarrier index in the VRB area. Also, each block shown in FIG. 6 represents a resource element. In the symbol mapping to VRB in procedure B6, the column vector [z ⁽⁰⁾ (g ⁾ , z ⁽¹⁾ (g ⁾ , . (g) ^, ^. In symbol mapping to VRB, a column vector z[z ⁽⁰⁾ ( ^g ), z ⁽¹⁾ (g), z ^(p) (g), . . . , z ^(P−1) (g)] ^T may be mapped to resource elements based on the subcarrier index k ^a _sc priority.

In procedure B7, VRB to PRB mapping may be performed. After the VRB is mapped to _the _PRB , a column vector z[z ⁽⁰⁾ ( ^g ), z ^{(1 )} (g), _. . . z ( ^p ⁾ ( ^g ), _. Here, a(k _sc , l _sym ) is also referred to as the content (or value) of OFDM symbol index l _sym of subcarrier index k _sc .

In procedure B8, the baseband signal s _lsym (t) may be generated based at least on the content a(k _sc , l _sym ) of OFDM symbol index l _sym at subcarrier index k _sc . The baseband signal generation in procedure B8 corresponds to IFFT (Inverse Fast Fourier Transform) for content a(k _sc , l _sym ).

The baseband signal s _lsym (t) generated in procedure B8 may be input to the RF section 12 . In the RF section 12 , signal power may be amplified by a power amplifier and sent out in the antenna section 11 .

The base station device 3 receives the PUSCH transmitted from the terminal device 1. Physical layer processing section 30 may attempt to detect one or both of transport block 5011 and transport block 5012 delivered from PUSCH.

Here, when the PTRS is multiplexed on the PUSCH, the terminal device 1 needs to determine the time domain mapping of the PTRS. Conventionally, the determination of the time domain mapping of the PTRS was based on the value of the MCS associated with the PUSCH. However, in one aspect of this embodiment, two MCS values may be associated with PUSCH.

For example, the physical layer processing unit 10 uses the MCS value associated with the transport block 5011 and the MCS value associated with the transport block 5012 to determine the time domain mapping of the PTRS mapped to the PUSCH 5010. Both can be used.

For example, the physical layer processing unit 10 uses the MCS value associated with the transport block 5011, the MCS value associated with the transport block 5012, and the You may specify the maximum value of Also, the physical layer processing unit 10 may determine the time domain mapping of the PTRS mapped to the PUSCH 5010 based on the specified maximum MCS value.

For example, in determining the maximum value, 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 maximum value based on the MCS value associated with the transport block 5012 being assumed to be the MCS value for the initial transmission of the transport block 5012. . Here, the first MCS type is an MCS type in which a modulation scheme and a target coding rate are related to the MCS value. Also, the second MCS type is an MCS type in which the value of MCS is related to the modulation scheme and not related to the target coding rate.

For example, in specifying the maximum value, if either one of the MCS value associated with the transport block 5011 and the MCS value associated with the transport block 5012 is the second MCS type, the physical layer processing unit 10 may specify an MCS value that is not the second MCS type. Also, the physical layer processing unit 10 may determine the time domain mapping of the PTRS mapped to the PUSCH 5010 based on the identified MCS value.

For example, in specifying 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 , the MCS value associated with transport block 5011 is assumed to be the MCS value for the initial transmission of transport block 5011, and the MCS value associated with transport block 5012 is assumed to be the MCS value of transport block 5012. The maximum value may be specified based on what is assumed to be the value of MCS for the initial transmission.

For example, when both the MCS value associated with transport block 5011 and the MCS value associated with transport block 5012 are of the second MCS type, using the preset PTRS time domain mapping good too. Here, the preconfigured PTRS time domain mapping may be provided by the RRC layer.

For example, the physical layer processing unit 10 uses the MCS value associated with the transport block 5011, the MCS value associated with the transport block 5012, and the You may specify the minimum value of Also, the physical layer processing unit 10 may determine the time domain mapping of the PTRS mapped to the PUSCH 5010 based on the specified maximum MCS value.

For example, in determining the minimum value, 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 identify the minimum value based on which the MCS value associated with the transport block 5012 is assumed to be the MCS value for the initial transmission of the transport block 5012. .

For example, in specifying the minimum value, if either one of the MCS value associated with the transport block 5011 and the MCS value associated with the transport block 5012 is the second MCS type, the physical layer processing unit 10 may specify an MCS value that is not the second MCS type. Also, the physical layer processing unit 10 may determine the time domain mapping of the PTRS mapped to the PUSCH 5010 based on the identified MCS value.

For example, in specifying 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 , the MCS value associated with transport block 5011 is assumed to be the MCS value for the initial transmission of transport block 5011, and the MCS value associated with transport block 5012 is assumed to be the MCS value of transport block 5012. The minimum value may be specified based on what is assumed to be the value of MCS for the initial transmission.

For example, the physical layer processing unit 10 may specify the value of the MCS associated with the transport block 5011 for determining the time domain mapping of the PTRS mapped to the PUSCH 5010 . Also, the physical layer processing unit 10 may determine the time domain mapping of the PTRS mapped to the PUSCH 5010 based on the identified MCS value. Here, the physical layer processing unit 10 may not use the MCS value associated with the transport block 5012 to determine the time domain mapping of the PTRS mapped to the PUSCH 5010 .

For example, in identifying the MCS value, if the MCS value associated with transport block 5012 is the first MCS type and the MCS value associated with transport block 5011 is the second MCS type , the physical layer processing unit 10 identifies the MCS value associated with the transport block 5011 based on the assumption that the MCS value is the MCS value for the initial transmission of the transport block 5011. good too.

For example, in identifying the MCS value, if the MCS value associated with transport block 5012 is the first MCS type and the MCS value associated with transport block 5011 is the second MCS type , the physical layer processing unit 10 may specify the value of the MCS associated with the transport block 5012 .

For example, the physical layer processing unit 10 receives the information indicating whether or not the MCS value associated with the transport block 5011 is used for determining the mapping of the time domain of the PTRS mapped to the PUSCH 5010. You may be notified. If the information does not indicate to use the value of the MCS associated with the transport block 5011 for determining the time domain mapping of the PTRS mapped to the PUSCH 5010, the physical layer processing unit 10 determines the PTRS mapped to the PUSCH 5010. The value of MCS associated with transport block 5012 may be used for the determination of the time domain mapping of . Here, the information may be determined based on the DCI format 5001. Alternatively, the information may be indicated by the 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.

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

For example, the physical layer processing unit 10 determines the number of layers to which the codeword corresponding to the transport block 5011 is mapped and the number of layers to which the codeword corresponding to the transport block 5012 is mapped in order to determine the mapping of the time domain of the PTRS mapped to the PUSCH 5010. A maximum value for the number of layers to which the codewords to be mapped may be specified. Also, the physical layer processing unit 10 identifies the transport block corresponding to the identified maximum value, and based on the MCS value associated with the identified transport block, the time domain of the PTRS mapped to the PUSCH 5010 may determine the mapping of

For example, when the MCS value associated with the transport block 5011 is the first MCS type and the MCS value associated with the transport block 5012 is the second MCS type, the physical layer processing unit 10 The time domain mapping of PTRS mapped to PUSCH 5010 may be determined based on the value of MCS associated with transport block 5011 rather than based on specifying the maximum value.

For example, the physical layer processing unit 10 determines the number of layers to which the codeword corresponding to the transport block 5011 is mapped and the number of layers to which the codeword corresponding to the transport block 5012 is mapped in order to determine the mapping of the time domain of the PTRS mapped to the PUSCH 5010. A minimum value for the number of layers to which the codewords to be mapped may be specified. Also, the physical layer processing unit 10 identifies the transport block corresponding to the identified maximum value, and based on the MCS value associated with the identified transport block, the time domain of the PTRS mapped to the PUSCH 5010 may determine the mapping of

For example, when the MCS value associated with the transport block 5011 is the first MCS type and the MCS value associated with the transport block 5012 is the second MCS type, the physical layer processing unit 10 The time domain mapping of PTRS mapped to PUSCH 5010 may be determined based on the value of MCS associated with transport block 5011 rather than based on specifying the minimum value.

Aspects of various devices according to one aspect of the present embodiment will be described below.

(1) In order to achieve the above objects, the aspects of the present invention take the following measures. That is, a first aspect of the present invention is a terminal device that uses a DCI format with a first MCS field for a first transport block and a second MCS field for a second transport block. a receiver for detecting; and a transmitter for transmitting one or both of the first transport block and the second transport block on PUSCH based on the DCI format, wherein the transmitter is , the PTRS is multiplexed on the PUSCH and transmitted, and the transmitting unit transmits the density of allocation of the PTRS in the time domain by a first MCS index indicated by the first MCS field and the second MCS field. , wherein the procedure is any one of procedure 1 to procedure 4, wherein the procedure 1 is the first MCS index and the first MCS index. selecting a larger MCS index from among the MCS indexes of 2, and determining the time domain allocation density of the PTRS based on the selected MCS index, wherein the procedure 2 is the first MCS index; A procedure of selecting a smaller MCS index from among the index and the second MCS index, and determining the time domain allocation density of the PTRS based on the selected MCS index, wherein the procedure 3 is the above A procedure for determining the density of allocation of the time domain of the PTRS based on the first MCS index regardless of whether transmission of the first transport block is indicated, and the procedure 4 includes: a first number of layers to which a first codeword corresponding to a first transport block is mapped and a second number of layers to which a second codeword corresponding to said second transport block is mapped; and the number of layers, whichever has the greater number of layers, and determines the density of the time domain constellation of the PTRS based on the MCS index corresponding to the transport block corresponding to the selected codeword. be.

(2) In addition, in the first aspect of the present invention, when the first MCS index is included in a predetermined value range, the transmitting unit uses the first transport as the first MCS index. Suppose it is the MCS index indicated in the initial transmission of the block.

(3) In addition, in the first aspect of the present invention, when the first MCS index is included in a predetermined range of values, the transmitting unit performs the time-domain transmission of the PTRS based on the second MCS index. Determine the density of placement.

(4) In addition, in the first aspect of the present invention, when the first MCS index is included in a predetermined range of values, the transmitting unit performs the MCS indicated in the initial transmission of the first transport block. The index is used to determine the density of the PTRS time domain constellation.

(5) In addition, a second aspect of the present invention is a base station apparatus that includes a first MCS field for a first transport block and a second MCS field for a second transport block, and a PUSCH transmitted based on the DCI format, the PUSCH including one or both of the first transport block and the second transport block. a receiving unit for receiving, wherein the receiving unit separates the PTRS from the PUSCH, and the receiving unit determines the time domain constellation density of the PTRS from the first determined based on a procedure using one or both of the MCS index and the second MCS index indicated by the second MCS field, wherein the procedure is any one of procedure 1 to procedure 4, wherein the procedure 1 is , selecting a larger MCS index from the first MCS index and the second MCS index, and determining a time domain constellation density of the PTRS based on the selected MCS index; The step 2 selects a smaller MCS index from the first MCS index and the second MCS index, and determines the density of the time-domain constellation of the PTRS based on the selected MCS index. wherein step 3 determines a time domain constellation density of the PTRS based on the first MCS index regardless of whether transmission of the first transport block is indicated. A procedure, wherein said procedure 4 comprises a first number of layers to which a first codeword corresponding to said first transport block is mapped and a second codeword corresponding to said second transport block; a second number of layers to which words are mapped, selecting the greater number of layers, and mapping the time domain of the PTRS based on the MCS index corresponding to the transport block corresponding to the selected codeword. Procedures such as determining the density of an arrangement.

(6) In addition, in the second aspect of the present invention, when the first MCS index is included in a predetermined value range, the first MCS index is the first transport Suppose it is the MCS index indicated in the initial transmission of the block.

(7) In addition, in the second aspect of the present invention, when the first MCS index is included in a predetermined value range, the receiving unit performs the time domain of the PTRS based on the second MCS index. Determine the density of placement.

(8) In addition, in the second aspect of the present invention, when the first MCS index is included in a predetermined value range, the receiving unit performs the MCS indicated in the initial transmission of the first transport block The index is used to determine the density of the PTRS time domain constellation.

A program that operates on the base station device 3 and the terminal device 1 according to one aspect of the present invention controls a CPU (Central Processing Unit) and the like so as to realize the functions of the above-described embodiments related to one aspect of the present invention. It may be a program (a program that causes a computer to function). The 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) and HDD (Hard Disk Drive), It is read, modified, and written by the CPU as necessary.

It should be noted 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 that case, a program for realizing this control function may be recorded in a computer-readable recording medium, and the program recorded in this recording medium may be read into a computer system and executed.

The "computer system" here is a computer system built into the terminal device 1 or the base station device 3, and includes hardware such as an OS and peripheral devices. The term "computer-readable recording medium" refers to portable media such as flexible discs, magneto-optical discs, ROMs and CD-ROMs, and storage devices such as hard discs incorporated in computer systems.

Furthermore, "computer-readable recording medium" means a medium that dynamically stores a program for a short period of time, such as a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line. In that case, it may also include a memory that holds the program for a certain period of time, such as a volatile memory inside a computer system that serves as a server or client. Further, the program may be for realizing part of the functions described above, or may be capable of realizing the functions described above in combination with a program already recorded in the computer system.

Also, the base station device 3 in the above-described embodiment can be realized as an aggregate (device group) composed of a plurality of devices. Each of the devices constituting the device group may include a part or all of each function or each functional block of the base station device 3 related to the above-described embodiments. A device group may have a series of functions or functional blocks of the base station device 3 . Also, the terminal device 1 according to the above-described embodiments can communicate with a base station device as a group.

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

Also, part or all of the terminal device 1 and the base station device 3 in the above-described embodiments may be typically implemented as an LSI, which is an integrated circuit, or may be implemented as a chipset. Each functional block of the terminal device 1 and the base station device 3 may be individually chipped, or part or all of them may be integrated and chipped. Also, the method of circuit integration is not limited to LSI, but may be realized by a dedicated circuit or a general-purpose processor. In addition, when a technology for integrating circuits to replace LSIs emerges due to advances in semiconductor technology, it is possible to use an integrated circuit based on this technology.

In addition, in the above-described embodiments, a terminal device was described as an example of a communication device, but the present invention is not limited to this. For example, it can be applied to terminal devices or communication devices such as AV equipment, kitchen equipment, cleaning/washing equipment, air conditioning equipment, office equipment, vending machines, and other household equipment.

Although the embodiment of this invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes etc. within the scope of the gist of this invention are also included. Further, one aspect of the present invention can be modified in various ways within the scope of the claims, and an embodiment obtained by appropriately combining technical means disclosed in different embodiments can also be Included in scope. Moreover, it is an element described in said each embodiment, and the structure which replaced the element which shows the same effect is also included.

One aspect of the present invention is, for example, a communication system, a communication device (e.g., a mobile phone device, a base station device, a wireless LAN device, or a sensor device), an integrated circuit (e.g., a communication chip), or a program, etc. be able to.

1 (1A, 1B, 1C) terminal device 3 base station device 9

radio communication system

10, 30 physical layer control units 10a, 30a radio transmission units 10b, 30b radio reception units 11, 31

antenna units

12, 32

RF units

13, 33

Baseband units

14, 34 Upper

layer processing units

15, 35 Medium access control

layer processing units

16, 36 Radio resource control layer processing units 5000 PDCCH
5001 DCI format 5010 PUSCH
5011, 5012 transport block

Claims

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;
Based on the DCI format, a transmitting unit that transmits one or both of the first transport block and the second transport block on PUSCH,
The transmitting unit multiplexes the PTRS with the PUSCH and transmits the
The transmitting unit determines the time domain allocation density of the PTRS as one of a first MCS index indicated by the first MCS field and a second MCS index indicated by the second MCS field, or determined based on a procedure using both;
The procedure is any one of procedure 1 to procedure 4,
The procedure 1 selects a larger MCS index from the first MCS index and the second MCS index, and determines a time-domain constellation density of the PTRS based on the selected MCS index. is the procedure,
The step 2 selects a smaller MCS index from the first MCS index and the second MCS index, and determines the density of the time-domain constellation of the PTRS based on the selected MCS index. is the procedure,
The procedure 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,
In step 4, a first number of layers to which a first codeword corresponding to the first transport block is mapped and a second codeword corresponding to the second transport block are mapped. and a second number of layers in which the number of layers is greater, and the density of the time domain constellation of the PTRS based on the MCS index corresponding to the transport block corresponding to the selected codeword. A procedure that determines terminal equipment.
The transmitting unit assumes that the first MCS index is the MCS index indicated in the initial transmission of the first transport block when the first MCS index is included in a predetermined value range. The terminal device according to claim 1.
The terminal apparatus according to claim 1, wherein, when the first MCS index is included in a predetermined value range, the transmission unit determines the density of allocation of the PTRS in the time domain based on the second MCS index. .
The transmitting unit determines a time-domain allocation density of PTRS using the MCS index indicated in the initial transmission of the first transport block when the first MCS index is included in a predetermined value range. The terminal device according to claim 1.
a transmitter for transmitting a DCI format with a first MCS field for a first transport block and a second MCS field for a second transport block;
a PUSCH transmitted based on the DCI format, the first transport block, and a receiving unit that receives the PUSCH including one or both of the second transport block;
The receiving unit separates the PTRS from the PUSCH,
The receiving unit determines the time domain allocation density of the PTRS to either a first MCS index indicated by the first MCS field or a second MCS index indicated by the second MCS field, or determined based on a procedure using both;
The procedure is any one of procedure 1 to procedure 4,
The procedure 1 selects a larger MCS index from the first MCS index and the second MCS index, and determines a time-domain constellation density of the PTRS based on the selected MCS index. is the procedure,
The step 2 selects a smaller MCS index from the first MCS index and the second MCS index, and determines the density of the time-domain constellation of the PTRS based on the selected MCS index. is the procedure,
The procedure 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,
In step 4, a first number of layers to which a first codeword corresponding to the first transport block is mapped and a second codeword corresponding to the second transport block are mapped. and a second number of layers in which the number of layers is greater, and the density of the time domain constellation of the PTRS based on the MCS index corresponding to the transport block corresponding to the selected codeword. A procedure such as determining base station equipment.
The receiving unit assumes that the first MCS index is the MCS index indicated in the initial transmission of the first transport block when the first MCS index is included in a predetermined value range. The base station apparatus according to claim 5.
The base station according to claim 5, wherein, when the first MCS index is included in a predetermined value range, the receiving unit determines the density of allocation of the PTRS in the time domain based on the second MCS index. Device.
When the first MCS index is included in a predetermined value range, the receiving unit determines the density of the PTRS time domain allocation using the MCS index indicated in the initial transmission of the first transport block. The base station apparatus according to claim 5.
A communication method used in a terminal device,
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 PUSCH based on the DCI format;
a step of multiplexing the PTRS with the PUSCH and transmitting;
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 to determine the density of the time domain arrangement of the PTRS determining based on
The procedure is any one of procedure 1 to procedure 4,
The procedure 1 selects a larger MCS index from the first MCS index and the second MCS index, and determines a time-domain constellation density of the PTRS based on the selected MCS index. is the procedure,
The step 2 selects a smaller MCS index from the first MCS index and the second MCS index, and determines the density of the time-domain constellation of the PTRS based on the selected MCS index. is the procedure,
The procedure 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,
In step 4, a first number of layers to which a first codeword corresponding to the first transport block is mapped and a second codeword corresponding to the second transport block are mapped. and a second number of layers in which the number of layers is greater, and the density of the time domain constellation of the PTRS based on the MCS index corresponding to the transport block corresponding to the selected codeword. A procedure that determines how to communicate.