WO2020170913A1 - Terminal device, base station device, and communication method - Google Patents

Abstract

In order to provide efficient communication, the present invention comprises: a reception unit that receives random access responses and DCI format; and a transmission unit that transmits scheduled PUSCH on the basis of at least a random access response grant included in a random access response. The PUSCH includes a CSI report if transmitted when the number of bits in a first CSI request field set in the DCI format is 1 and the number of bits in a second CSI request field included in the random access response grant is 1. The second CSI request field is reserved when the number of bits in the first CSI request field set in the DCI format is not 1.

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. The present application claims priority based on Japanese Patent Application No. 2019-29256 filed in Japan on February 21, 2019, the content of which is incorporated herein by reference.

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

In 3GPP, the next-generation standard (NR: New Radio) is being examined in order to propose it to IMT (International Mobile Telecommunication)-2020, which is a standard for the next-generation mobile communication system established by the International Telecommunication Union (ITU) Is performed (Non-Patent Document 1). NR is required to meet the requirements of three scenarios of eMBB (enhanced Mobile BroadBand), mMTC (massive Machine Type Communication), and URLLC (Ultra Reliable and Low Latency Communication) in a single technology framework. There is.

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

(1) A first aspect of the present invention is a terminal device, which is scheduled based on at least a receiving unit that receives a random access response and a DCI format, and a random access response grant included in the random access response. A transmission unit for transmitting PUSCH, wherein the number of bits of the first CSI request field set in the DCI format is 1 and bits of the second CSI request field included in the random access response grant. Indicates 1, the PUSCH is transmitted including a CSI report, and if the number of bits of the first CSI request field set in the DCI format is other than 1, the second CSI request field is reserved. It

(2) A second aspect of the present invention is a base station apparatus, which is scheduled based on at least a random access response and a transmission unit that transmits a DCI format, and a random access response grant included in the random access response. And a receiving unit for receiving PUSCH, wherein the number of bits of the first CSI request field set in the DCI format is 1, and the second CSI request field included in the random access response grant is When the bit indicates 1, the PUSCH is transmitted including a CSI report, and when the number of bits of the first CSI request field set in the DCI format is other than 1, the second CSI request field is reserved. To be done.

(3) A third aspect of the present invention is a communication method used in a terminal device, comprising a step of receiving a random access response and a DCI format, and at least a random access response grant included in the random access response. Transmitting a PUSCH scheduled based on the second CSI request included in the random access response grant, in which the number of bits of the first CSI request field set in the DCI format is 1. When the bit of the field indicates 1, the PUSCH is transmitted including the CSI report, and when the number of bits of the first CSI request field set in the DCI format is other than 1, the second CSI request field is set. Is reserved.

(4) A fourth aspect of the present invention is a communication method used in a base station apparatus, comprising a step of transmitting a random access response and a DCI format, and a random access response grant included in the random access response. Receiving PUSCH scheduled based on at least the second CSI, wherein the number of bits of the first CSI request field set in the DCI format is 1, and the second CSI included in the random access response grant. When the bit of the request field indicates 1, the PUSCH is transmitted including the CSI report, and when the number of bits of the first CSI request field set in the DCI format is other than 1, the second CSI request is transmitted. The field is reserved.

According to one aspect of the present invention, the terminal device can efficiently perform communication. In addition, the base station device can efficiently perform communication.

It is a conceptual diagram of the radio|wireless communications system which concerns on 1 aspect of this embodiment. 7 is an example showing a relationship between N ^slot _symb , subcarrier spacing setting μ, and CP setting according to an aspect of the present embodiment. It is a schematic diagram showing an example of a resource grid in a subframe concerning one mode of this embodiment. An example of a relationship between the length ^N _{PUCCH symb} of PUCCH format and PUCCH format according to one embodiment of the present embodiment; FIG. It is a figure which shows an example of the monitoring opportunity of a search area set which concerns on the aspect of this embodiment. It is a schematic block diagram which shows the structure of the terminal device 1 which concerns on 1 aspect of this embodiment. It is a schematic block diagram which shows the structure of the base station apparatus 3 which concerns on the one aspect|mode of this embodiment. It is a figure which shows an example of the field contained in the random access message 2 which concerns on the one aspect|mode of this embodiment. It is a figure which shows the relationship example of the CSI request and CSI-RS resource which concern on the one aspect|mode of this embodiment.

An embodiment of the present invention will be described below.

“A and/or B” may be terms that include “A”, “B”, or “A and B”.

FIG. 1 is a conceptual diagram of a wireless communication system according to an aspect of the present embodiment. In FIG. 1, the wireless communication system includes terminal devices 1A to 1C and a base station device 3 (BS#3: Base station#3). Hereinafter, the terminal devices 1A to 1C will also be referred to as the terminal device 1 (UE#1: User Equipment#1).

The base station device 3 may be configured to include one or both of an MCG (Master Cell Group) and an SCG (Secondary Cell Group). The MCG is a group of serving cells configured to include at least a PCell (Primary Cell). The SCG is a group of serving cells configured to include at least PSCell (Primary Secondary Cell). The PCell may be a serving cell provided based on the initial connection. The PCell may be a serving cell in which initial connection is performed. The MCG may be configured to include one or more SCells (Secondary Cells). The SCG may be configured to include one or more SCells. PCell is also called a primary cell. PSCell is also called a primary secondary cell. SCell is also called a secondary cell.

The MCG may be composed of a serving cell on EUTRA. The SCG may be composed of a serving cell according to the next-generation standard (NR: New Radio).

The following describes the frame structure.

At least OFDM (Orthogonal Frequency Division Multiplex) is used in the wireless communication system according to one aspect of the present embodiment. An OFDM symbol is a time domain unit of OFDM. An OFDM symbol includes at least one or more subcarriers. The OFDM symbol is converted into a time-continuous signal in baseband signal generation. In the downlink, at least CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplex) is used. In the uplink, either CP-OFDM or DFT-s-OFDM (Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplex) is used. DFT-s-OFDM may be provided by applying transform precoding to CP-OFDM.

∙ The OFDM symbol may be a name including a CP added to the OFDM symbol. That is, a certain OFDM symbol may be configured to include the certain OFDM symbol and the CP added to the certain OFDM symbol.

The subcarrier spacing (SCS) may be given by the subcarrier spacing Δf=2 ^μ ·15 kHz. For example, the subcarrier spacing configuration μ may be set to either 0, 1, 2, 3, 4, and/or 5. For a certain BWP (Band Width Part), the subcarrier spacing setting μ may be given by an upper layer parameter.

In the wireless communication system according to the aspect of the present embodiment, the time unit (time unit) T _c may be used for expressing the length of the time domain. The time unit T _c may be given by T _c =1/(Δf _max ·N _f ). Δf _max may be the maximum value of the subcarrier interval supported in the wireless communication system according to the aspect of the present embodiment. Δf _max may be Δf _max =480 kHz. N _f may be N _f =4096. The constant κ is κ=Δf _max ·N _f /(Δf _ref N _f,ref )=64. Δf _ref may be 15 kHz. N _f,ref may be 2048.

The constant κ may be a value indicating the relationship between the reference subcarrier interval and T _c . The constant κ may be used for the subframe length. The number of slots included in the subframe may be given based at least on the constant κ. Δf _ref is a reference subcarrier interval, and N _f,ref is a value corresponding to the reference subcarrier interval.

-Transmission of signals on the downlink and/or transmission of signals on the uplink may be organized into 10 ms frames (organized into). The frame is configured to include 10 subframes. The subframe length is 1 ms. The frame length may be given regardless of the subcarrier spacing Δf. That is, the length of the frame may be given regardless of μ. The length of the subframe may be given regardless of the subcarrier spacing Δf. That is, the length of the subframe may be given regardless of μ.

For some subcarrier spacing setting μ, the number and index of slots contained in a subframe may be given. For example, the slot number n ^μ _s may be given in ascending order with an integer value in the range of 0 to N ^{subframe, μ} _slot −1 in the ^subframe . For the setting μ of the subcarrier spacing, the number of slots included in the frame and the index may be given. Further, the slot numbers n ^μ _s,f may be given in ascending order with integer values in the range of 0 to N ^frame,μ _slot −1 in the ^frame . Consecutive N ^slot _symb OFDM symbols may be included in one slot. N ^slot _symb may be given based at least and/or based on a part or all of a CP (Cyclic Prefix) setting. The CP setting may be provided based at least on the upper layer parameters. CP settings may be provided based at least on dedicated RRC signaling. The slot number is also called a slot index.

FIG. 2 is an example showing the relationship between N ^slot _symb , subcarrier spacing setting μ, and CP setting according to an aspect of the present embodiment. In FIG. 2A, for example, when the subcarrier interval setting μ is 2 and the CP setting is a normal CP (normal cyclic prefix), N ^slot _symb =14, N ^frame,μ _slot =40, N ^subframe,μ _slot =4. Further, in FIG. 2B, for example, when the subcarrier interval setting μ is 2 and the CP setting is extended CP (extended cyclic prefix), N ^slot _symb =12, N ^frame,μ _slot =40, N ^{subframe, μ} _slot =4.

The physical resources are explained below.

An antenna port may be defined by the fact that the channel on which symbols are transmitted on one antenna port can be estimated from the channel on which other symbols are transmitted on the same antenna port. If the large scale property of the channel where the symbols are transmitted at one antenna port can be estimated from the channel where the symbols are transmitted at the other antenna port, the two antenna ports are QCL (Quasi Co-Located). ) Is called. The large-scale characteristic may include at least a long-term characteristic of the channel. Large-scale characteristics include delay spread (delay spread), Doppler spread (Doppler spread), Doppler shift (Doppler shift), average gain (average gain), average delay (average delay), and beam parameters (spatial Rx parameters). You may include at least one part or all. That the first antenna port and the second antenna port are QCL with respect to the beam parameter means that the receiving beam assumed by the receiving side for the first antenna port and the receiving beam assumed by the receiving side for the second antenna port. And may be the same. That the first antenna port and the second antenna port are QCL with respect to the beam parameters means that the transmission beam assumed by the reception side for the first antenna port and the transmission beam assumed by the reception side for the second antenna port. And may be the same. In the terminal device 1, when the large-scale characteristic of the channel in which the symbol is transmitted in one antenna port can be estimated from the channel in which the symbol is transmitted in the other antenna port, it is assumed that the two antenna ports are QCL. May be done. The fact that the two antenna ports are QCL may mean that the two antenna ports are assumed to be QCL.

A resource grid defined by N ^{size, μ} _{grid, x} N ^RB _sc subcarriers and N ^{subframe, μ} _symb OFDM symbols is provided for setting the subcarrier spacing and setting the carriers. N ^size,μ _grid,x may indicate the number of resource blocks provided for setting μ of the subcarrier spacing for carrier x. N ^size,μ _grid,x may indicate the bandwidth of the carrier. N ^size,μ _grid,x may correspond to the value of the upper layer parameter CarrierBandwidth. Carrier x may indicate either a downlink carrier or an uplink carrier. That is, x may be either “DL” or “UL”. N ^RB _sc may indicate the number of subcarriers included in one resource block. N ^RB _sc may be 12. At least one resource grid may be provided per antenna port p and/or per subcarrier spacing setting μ and/or per transmission direction setting. The transmission direction includes at least downlink (DL: DownLink) and uplink (UL: UpLink). Hereinafter, the set of parameters including at least part or all of the antenna port p, the subcarrier spacing setting μ, and the setting of the transmission direction is also referred to as a first wireless parameter set. That is, one resource grid may be provided for each first wireless parameter set.

In the downlink, the carrier included in the serving cell is called the downlink carrier (or downlink component carrier). In the uplink, a carrier included in the serving cell is called an uplink carrier (uplink component carrier). The downlink component carrier and the uplink component carrier are generically called a component carrier (or carrier).

The type of serving cell may be PCell, PSCell, or SCell. The PCell may be a serving cell identified at least based on the cell ID acquired from the SS/PBCH in the initial connection. For the PCell, at least the RACH resource may be set. The SCell may be a serving cell used in carrier aggregation. The SCell may be a serving cell provided at least based on dedicated RRC signaling.

Each element in the resource grid provided for each first radio parameter set is called a resource element. The resource element is specified based on at least the frequency domain index k _sc and the time domain index l _sym . For a certain first radio parameter set, resource elements are identified based at least on the frequency domain index k _sc and the time domain index l _sym . The resource element specified by the frequency domain index _ksc and the time domain index _lsym is also referred to as a resource element ( _ksc , _lsym ). The frequency domain index k _sc indicates any value from 0 to N ^μ _RB N ^RB _sc −1. N ^μ _RB may be the number of resource blocks provided for setting μ of the subcarrier spacing. N ^μ _RB may be N ^{size, μ} _grid,x . N ^RB _sc is the number of subcarriers included in the resource block, and N ^RB _sc =12. The frequency domain index _ksc may correspond to the subcarrier index _ksc . The time domain index l _sym may correspond to the OFDM symbol index l _sym .

FIG. 3 is a schematic diagram showing an example of a resource grid in a subframe according to an aspect of the present embodiment. In the resource grid of FIG. 3, the horizontal axis is the time domain index l _sym , and the vertical axis is the frequency domain index k _sc . In one subframe, the frequency domain of the resource grid includes N ^μ _RB N ^RB _sc subcarriers. In one subframe, the time domain of the resource grid may include 14.2 ^μ OFDM symbols. One resource block is configured to include N ^RB _sc subcarriers. The time domain of the resource block may correspond to one OFDM symbol. The time domain of the resource block may correspond to 14 OFDM symbols. The time domain of the resource block may correspond to one or more slots. The time domain of the resource block may correspond to one subframe.

The terminal device 1 may be instructed to perform transmission/reception using only a subset of the resource grid. A subset of the resource grid is also referred to as BWP, which may be provided at least based on higher layer parameters and/or some or all of the DCI. BWP is also called a carrier band part (Carrier Bandwidth Part). BWP is also called a band part. The terminal device 1 may not be instructed to perform transmission/reception using all sets of the resource grid. The terminal device 1 may be instructed to perform transmission/reception using a part of frequency resources in the resource grid. One BWP may be composed of a plurality of resource blocks in the frequency domain. One BWP may be composed of a plurality of consecutive resource blocks in the frequency domain. The BWP set for the downlink carrier is also called the downlink BWP. The BWP set for the uplink carrier is also referred to as the uplink BWP. The BWP may be a subset of the carrier's band.

One or more downlink BWPs may be set for each serving cell. One or more uplink BWPs may be configured for each serving cell.

Among the one or more downlink BWPs set for the serving cell, one downlink BWP may be set (or activated) as an active downlink BWP. The downlink BWP switch is used for deactivating one active downlink BWP and activating an inactive downlink BWP other than the one active downlink BWP. Downlink BWP switching may be controlled by a BWP field included in the downlink control information. Downlink BWP switching may be controlled based on upper layer parameters.

DL-SCH may be received in the active downlink BWP. The PDCCH may be monitored in the active downlink BWP. The PDSCH may be received in the active downlink BWP. Some or all of PDSCH, PDCCH, and CSI-RS may not be received outside the active downlink BWP.

DL-SCH does not have to be received in the inactive downlink BWP. In the inactive downlink BWP, the PDCCH may not be monitored. CSI for inactive downlink BWP may not be reported.

Of the one or more downlink BWPs set for the serving cell, two or more downlink BWPs may not be set as active downlink BWPs. One downlink BWP may be active at any given time.

Among the one or more uplink BWPs set for the serving cell, one uplink BWP may be set (or may be activated) as the active uplink BWP. The uplink BWP switching is used for deactivating one active uplink BWP and activating an inactive uplink BWP other than the one active uplink BWP. Uplink BWP switching may be controlled by the BWP field included in the downlink control information. Uplink BWP switching may be controlled based on upper layer parameters.

UL-SCH may be transmitted in the active uplink BWP. PUCCH may be transmitted in the active uplink BWP. The PRACH may be transmitted in the active uplink BWP. The SRS may be transmitted in the active uplink BWP. The PUSCH and some or all of the PUCCH may not be transmitted outside the active uplink BWP.

UL-SCH is not transmitted in the inactive uplink BWP. PUCCH is not transmitted in the inactive uplink BWP. The PRACH is not transmitted in the inactive uplink BWP. In the inactive uplink BWP, SRS is not transmitted.

Of one or more uplink BWPs set for the serving cell, two or more uplink BWPs may not be set as active uplink BWPs. One uplink BWP may be active at some time.

-The parameters of the upper layer (upper layer parameters) are the parameters included in the signal of the upper layer. The upper layer signal may be RRC (Radio Resource Control) signaling or MAC CE (Medium Access Control Control Element). Here, the upper layer signal may be an RRC layer signal or a MAC layer signal.

The upper layer signal may be common RRC signaling. The common RRC signaling may include at least some or all of the following features C1 to C3.
Feature C1) Feature of BCCH logical channel or feature C2 mapped to CCCH logical channel C2) Feature C3) including at least ReconfigurationWithSync information element and/or system information mapped to PBCH.

The ReconfigurationWithSync information element may include information indicating settings commonly used in the serving cell. The setting commonly used in the serving cells may include at least the PRACH setting. The PRACH setting may indicate at least one or a plurality of random access preamble indexes. The PRACH configuration may at least indicate PRACH time/frequency resources.

Common RRC signaling may include at least common RRC parameters. The common RRC parameter may be a parameter (cell-specific) commonly used in the serving cell.

The upper layer signal may be dedicated RRC signaling. The dedicated RRC signaling may include at least some or all of the following features D1 to D2.
Feature D1) Feature mapped to DCCH logical channel D2) ReconfigurationWithSync information element not included

For example, MIB (Master Information Block) and SIB (System Information Block) may be common RRC signaling. Also, the upper layer message mapped to the DCCH logical channel and including at least the ReconfigurationWithSync information element may be common RRC signaling. Further, a higher layer message that is mapped to the DCCH logical channel and does not include the ReconfigurationWithSync information element may be included in the dedicated RRC signaling.

-The SIB may indicate at least the time index of the SS (Synchronization Signal) block. The SS block is also called an SS/PBCH block. The SS block is also called an initial signal block. The SIB may include at least information related to PRACH resources. The SIB may include at least information related to initial connection setup.

The ReconfigurationWithSync information element may include at least information related to the PRACH resource (or RACH resource). The ReconfigurationWithSync information element may include at least information related to the setting of random access.

The dedicated RRC signaling may include at least a dedicated RRC parameter. The dedicated RRC parameter may be a (UE-specific) parameter used exclusively for the terminal device 1.

-Common RRC parameters and dedicated RRC parameters are also called upper layer parameters.

Hereinafter, physical channels and physical signals according to various aspects of this embodiment will be described.

One physical channel may be mapped to one serving cell. One physical channel may be mapped to one carrier band part set for one carrier included in one serving cell.

The uplink physical channel may correspond to a set of resource elements that carry information occurring in higher layers. The uplink physical channel may be a physical channel used in an uplink carrier. In the wireless communication system according to one aspect of the present embodiment, at least some or all of the following uplink physical channels may be used.
・PUCCH (Physical Uplink Control CHannel)
・PUSCH (Physical Uplink Shared CHannel)
・PRACH (Physical Random Access CHannel)

PUCCH may be used to transmit uplink control information (UCI: Uplink Control Information). The uplink control information includes part or all of channel state information (CSI: Channel State Information), scheduling request (SR: Scheduling Request), HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) information.

Uplink control information may be multiplexed on PUCCH. The multiplexed PUCCH may be transmitted.

Uplink control information may be mapped to PUCCH.

HARQ-ACK information is transport block (TB:Transport block, MAC PDU: Medium Access Control Protocol Data Unit, DL-SCH:Downlink-Shared Channel,  UL-SCH:Uplink-Shared Channel,  PDSCH:Physical Downlink Shared Channel) May include at least a HARQ-ACK bit corresponding to. The HARQ-ACK bit may indicate ACK (acknowledgement) or NACK (negative-acknowledgement) corresponding to the transport block. The ACK may be a value indicating that the decoding of the transport block has been completed successfully. NACK may be a value indicating that decoding of the transport block has not been completed successfully. The HARQ-ACK information may correspond to a HARQ-ACK codebook including one or more HARQ-ACK bits. The HARQ-ACK bit corresponding to one or a plurality of transport blocks may be that the HARQ-ACK bit corresponds to a PDSCH including the one or a plurality of transport blocks.

HARQ-ACK bit may indicate ACK or NACK corresponding to one CBG (Code Block Group) included in the transport block. HARQ-ACK information is also referred to as HARQ-ACK, HARQ feedback, HARQ information, HARQ control information, and HARQ-ACK message.

A scheduling request (SR: Scheduling Request) may be used at least to request a PUSCH (or UL-SCH) resource for initial transmission (new transmission). The scheduling request bit may be used to indicate either a positive SR (positive SR) or a negative SR (negative SR). The fact that the scheduling request bit indicates a positive SR is also referred to as “a positive SR is transmitted”. The positive SR may indicate that the terminal device 1 requests PUSCH resources for initial transmission. A positive SR may indicate that the scheduling request is triggered by higher layers. The positive SR may be transmitted when instructed to transmit the scheduling request by the upper layer. The fact that the scheduling request bit indicates a negative SR is also referred to as “a negative SR is transmitted”. The negative SR may indicate that the PUSCH resource for initial transmission is not requested by the terminal device 1. A negative SR may indicate that the scheduling request is not triggered by higher layers. A negative SR may be sent if higher layers do not indicate to send a scheduling request.

The scheduling request bit may be used to indicate either a positive SR or a negative SR for one or more SR configurations. Each of the one or more SR settings may correspond to one or more logical channels. The positive SR for an SR setting may be the positive SR for any or all of the one or more logical channels corresponding to the SR setting. Negative SR may not correspond to a particular SR setting. Showing a negative SR may mean showing a negative SR for all SR settings.

SR setting may be a scheduling request ID (SchedulingRequestID). The scheduling request ID may be given by an upper layer parameter.

The channel state information may include at least part or all of the channel quality index (CQI: Channel Quality Indicator), the precoder matrix index (PMI:Precoder Matrix Indicator), and the rank index (RI: Rank Indicator). CQI is an index related to channel quality (for example, propagation strength), and PMI is an index related to precoder. The RI is an index related to the transmission rank (or the number of transmission layers).

Channel state information may be given based at least on receiving a physical signal (eg, CSI-RS) used at least for channel measurement. The channel state information may include a value selected by the terminal device 1. The channel state information may be selected by the terminal device 1 based at least on receiving a physical signal used at least for channel measurement. Channel measurements may include interferometry measurements.

ㆍChannel status information report is a report of channel status information. The channel state information report may include CSI part 1 and/or CSI part 2. The CSI part 1 may be configured to include at least part or all of wideband channel quality information (wideband CQI), wideband precoder matrix index (wideband PMI), and rank index. The number of bits of CSI part 1 multiplexed on PUCCH may be a predetermined value regardless of the value of the rank index of the channel state information report. The number of bits of CSI part 2 multiplexed on PUCCH may be given based at least on the value of the rank index of the channel state information report. The rank index of the channel state information report may be the value of the rank index used for calculating the channel state information report. The rank index of the channel status information may be a value indicated by the rank index field included in the channel status information report.

The set of rank indicators permitted in the channel status information report may be a part or all of 1 to 8. The set of rank indicators allowed in the channel state information report may be given based at least on the higher layer parameter RankRestriction. If the set of allowed rank indicators in the channel state information report contains only one value, the rank indicator in the channel state information report may be the one value.

Priority may be set for the channel status information report. The priority of the channel state information report is set regarding the time domain behavior of the channel state information report, the content type of the channel state information report, the index of the channel state information report, and/or the channel state information report. It may be given based at least on some or all of the indices of the serving cells for which measurements are set.

The setting regarding the behavior of the time domain of the channel state information report is performed by the channel state information report being aperiodic (aperiodic), the channel state information report being semi-persistent (semi-persistent), or , Quasi-static, or may be set.

The content type of the channel status information report may indicate whether the channel status information report includes Layer 1 RSRP (Reference Signals Received Power).

-The index of the channel status information report may be given by the upper layer parameter.

PUCCH supports PUCCH format (PUCCH format 0 to PUCCH format 4). The PUCCH format may be transmitted on the PUCCH. Transmitting the PUCCH format may be transmitting the PUCCH.

FIG. 4 is a diagram illustrating an example of a relationship between a PUCCH format and a PUCCH format length N ^PUCCH _{symb according} to an aspect of the present embodiment. The length N ^PUCCH _symb of PUCCH format 0 is 1 or 2 OFDM symbols. The PUCCH format 1 length N ^PUCCH _symb is any of 4 to 14 OFDM symbols. The length N ^PUCCH _symb of PUCCH format 2 is 1 or 2 OFDM symbols. The length N ^PUCCH _symb of PUCCH format 3 is any of 4 to 14 OFDM symbols. The length N ^PUCCH _symb of PUCCH format 4 is any of 4 to 14 OFDM symbols.

PUSCH is used at least to transmit the transport block. PUSCH may be used to transmit at least some or all of transport blocks, HARQ-ACK information, channel state information, and scheduling requests. PUSCH is used at least for transmitting the random access message 3.

UL-SCH may be mapped to PUSCH. The uplink control information may be mapped on the PUSCH.

The PRACH may be used at least to transmit the random access preamble (message 1). PRACH is a resource for initial connection establishment procedure, handover procedure, connection re-establishment procedure, synchronization for PUSCH transmission (timing adjustment), and PUSCH (or UL-SCH). May be used at least to indicate some or all of the above requirements. The random access preamble may be used to notify the base station device 3 of an index (random access preamble index) given by the upper layer of the terminal device 1.

The random access preamble may be given by cyclically shifting the Zadoff-Chu sequence corresponding to the physical root sequence index u. The Zadoff-Chu sequence may be generated based on the physical root sequence index u. Multiple random access preambles may be defined in one serving cell. The random access preamble may be identified based at least on the index of the random access preamble. Different random access preambles corresponding to different indexes of the random access preamble may correspond to different combinations of physical root sequence index u and cyclic shift. The physical root sequence index u and the cyclic shift may be given based at least on the information included in the system information. The physical root sequence index u may be an index that identifies a sequence included in the random access preamble. The random access preamble may be identified based at least on the physical root sequence index u.

The uplink physical signal may correspond to a set of resource elements. The uplink physical signal may not carry the information that occurs in higher layers. The uplink physical signal may be a physical signal used on the uplink carrier. In the wireless communication system according to the aspect of the present embodiment, at least some or all of the following uplink physical signals may be used.
・UL DMRS (UpLink Demodulation Reference Signal)
・SRS (Sounding Reference Signal)
・UL PTRS (UpLink Phase Tracking Reference Signal)

UL DMRS is related to the transmission of PUSCH and/or PUCCH. UL DMRS is multiplexed with PUSCH or PUCCH. The base station device 3 may use the UL DMRS to perform the channel correction of the PUSCH or PUCCH. Hereinafter, transmitting the PUSCH and UL DMRS related to the PUSCH together is simply referred to as transmitting the PUSCH. Hereinafter, transmitting the PUCCH and the UL DMRS related to the PUCCH together is simply referred to as transmitting the PUCCH. UL DMRS related to PUSCH is also called UL DMRS for PUSCH. UL DMRS related to PUCCH is also called UL DMRS for PUCCH.

The association between UL DMRS and PUSCH may be that UL DMRS and PUSCH are transmitted through the same antenna port. The relationship between the UL DMRS and the PUSCH may be that the UL DMRS precoder is the same as the PUSCH precoder.

The SRS may be transmitted at the end of the subframe in the uplink slot, or at a predetermined number of OFDM symbols from the end.

UL PTRS may be a reference signal used at least for phase tracking.

The downlink physical channel may correspond to a set of resource elements that carry information occurring in higher layers. The downlink physical channel may be a physical channel used in a downlink carrier. In the wireless communication system according to the aspect of the present embodiment, at least some or all of the following downlink physical channels may be used.
・PBCH (Physical Broadcast Channel)
・PDCCH (Physical Downlink Control Channel)
・PDSCH (Physical Downlink Shared Channel)

PBCH is used at least for transmitting MIB and/or PBCH payload. The PBCH payload may include at least information indicating an index regarding the transmission timing of the SS block. The PBCH payload may include information related to the SS block identifier (index). The PBCH may be transmitted based on a predetermined transmission interval. PBCH may be transmitted at intervals of 80 ms. PBCH may be transmitted at intervals of 160 ms. The content of information included in the PBCH may be updated every 80 ms. Part or all of the information included in the PBCH may be updated every 160 ms. The PBCH may be composed of 288 subcarriers. The PBCH may be configured to include 2, 3, or 4 OFDM symbols. The MIB may include information related to the identifier (index) of the SS block. The MIB may include information indicating at least a part of the slot number, the subframe number, and/or the radio frame number in which the PBCH is transmitted. The radio frame is configured to include 10 subframes.

BCH may be mapped to PBCH.

The PDCCH may be used at least for transmitting downlink control information (DCI: Downlink Control Information). The PDCCH may be transmitted including at least downlink control information. The downlink control information is also called a DCI format. The downlink control information may indicate at least either a downlink assignment (downlink assignment) or an uplink grant (uplink grant). The DCI format used for PDSCH scheduling is also referred to as downlink DCI format. Downlink assignments may be used to schedule the transmission of downlink signals, eg, PDSCH scheduling. That is, the downlink assignment and the downlink DCI format may have the same meaning. The DCI format used for PUSCH scheduling is also called an uplink DCI format. The uplink grant may be used to schedule the transmission of the uplink signal, and may be used, for example, to schedule the PUSCH. That is, the uplink grant and the uplink DCI format may have the same meaning. The uplink DCI format includes at least one or both of DCI format 0_0 and DCI format 0_1. The terminal device 1 may monitor a set of PDCCH candidates in one or a plurality of control resource sets (CORESET: COntrol REsource SET).

Downlink control information may be mapped to the PDCCH.

The DCI format 0_0 includes at least part or all of 1A to 1E.
1A) Identifier for DCI formats field
1B) Frequency domain resource assignment field
1C) Uplink Time domain resource assignment field
1D) Frequency hopping flag field
1E) 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 the uplink DCI format or the downlink DCI format. The DCI format specific field included in the DCI format 0_0 may indicate 0 (or may indicate the uplink DCI format).

The frequency domain resource allocation field may at least be used to indicate the allocation of frequency resources for PUSCH (or PDSCH).

The uplink time domain resource allocation field may at least be used to indicate the allocation of time resources for the PUSCH (or PDSCH).

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

The MCS field may be used at least to indicate a modulation scheme for PUSCH (PDSCH) and/or a part or all of the target coding rate. The target code rate may be a target code rate for a transport block of the PUSCH (or the PDSCH). The size of the transport block (TBS: Transport Block Size) may be given based at least on the target coding rate.

DCI format 0_0 does not need to include the field used for the CSI request (CSI request).

The DCI format 0_1 includes at least part or all of 2A to 2H.
2A) DCI format specific field 2B) Frequency domain resource allocation field 2C) Uplink time domain resource allocation field 2D) Frequency hopping flag field 2E) MCS field 2F) First CSI request field (first CSI request field)
2G) BWP field
2H) UL DAI field (Up link Downlink Assignment Indicator field)

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

The BWP field may be used to indicate the uplink BWP to which the PUSCH is mapped. The BWP field may be used to indicate the downlink BWP to which the PDSCH is mapped.

The first CSI request field is used at least to indicate CSI reporting. The size N _TS of the first CSI request field may be given based at least on the upper layer parameter ReportTriggerSize. The size N _TS of the first CSI request field may be 0 to 6 bits. Instructing CSI reporting is also referred to as CSI request.

In this embodiment, the size of the field may be defined by the number of bits. For example, a field size of 1 may indicate that the field has 1 bit.

For example, if the bits in the first CSI request field indicate 0 (each of the bits in the first CSI request bit field indicates 0), the CSI request may not be triggered by the first CSI request field. Good. In addition, when the bits of the first CSI request field indicate a value other than 0 (except when all the bits of the first CSI request bit field are 0), a CSI report of the first CSI request field CSI request for may be triggered. Further, the non-zero code point of the first CSI request field may correspond to the setting related to one CSI report. That is, a non-zero code point in the first CSI request field may indicate to trigger one CSI report.

Settings regarding N _REP CSI reports may be given to the terminal device 1 based on at least the upper layer parameters. A CSI report index may be provided for each of the N _REP CSI reports. If N _REP is less than 2^N _TS -1, each of the N _REP CSI reports may correspond to any of the non-zero code points of the first CSI request field. If N _REP is equal to 2^N _TS -1, each of the N _REP CSI reports may correspond to any of the non-zero code points of the first CSI request field. A^B indicates A to the power of B.

If N _REP is greater than 2^(N _TS -1), the command of the first MAC CE indicates which index's CSI report corresponds to which non-zero codepoint of the first CSI request field. May be.

The UL DAI field may be at least used for generating a codebook of HARQ-ACK information. V ^UL _DAI may be provided based at least on the value of the UL DAI field. V ^UL _DAI is also called UL DAI.

The downlink DCI format includes at least one or both of DCI format 1_0 and DCI format 1_1.

The DCI format 1_0 includes at least part or all of 3A to 3I.
3A) Identifier for DCI formats field
3B) Frequency domain resource assignment field
3C) Downlink Time domain resource assignment field
3D) Frequency hopping flag field
3E) MCS field: Modulation and Coding Scheme field
3F) First CSI request field
3G) PDSCH to HARQ feedback timing indicator field
3H) PUCCH resource indicator field
3I) Counter DAI field (Counter Downlink Assignment Indicator field)

The DCI format specific field included in the DCI format 1_0 may indicate 1 (or may indicate the downlink DCI format).

The downlink time domain resource allocation field may be used to indicate at least part or all of the OFDM symbol to which the timing K0, DMRS mapping type, PDSCH are mapped. When the index of the slot including the PDCCH is the slot n, the index of the slot including the PDSCH may be n+K0.

The PDSCH to HARQ feedback timing indication field may be a field indicating the timing K1. If the index of the slot including the last OFDM symbol of the PDSCH is slot n, the index of the slot including PUCCH or PUSCH including at least HARQ-ACK corresponding to the transport block included in the PDSCH is n+K1. Good. When the index of the slot including the last OFDM symbol of PDSCH is slot n, the first OFDM symbol of PUCCH or the first OFDM symbol of PUSCH including at least HARQ-ACK corresponding to the transport block included in the PDSCH is The index of the included slot may be n+K1.

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

The counter DAI field may be used at least for generating a codebook of HARQ-ACK information. V ^DL _C-DAI,c,m may be given based at least on the value of the counter DAI field. V ^DL _C-DAI,c,m is also called a counter DAI.

The DCI format 1_1 includes at least part or all of 4A to 4I.
4A) Identifier for DCI formats field
4B) Frequency domain resource assignment field
4C) Downlink time domain resource assignment field
4D) Frequency hopping flag field
4E) MCS field (MCS field: Modulation and Coding Scheme field)
4F) PDSCH to HARQ feedback timing indicator field
4G) PUCCH resource indicator field
4H) BWP field
4I) DAI field (Downlink Assignment Indicator field)

The DCI format specific field included in the DCI format 1_1 may indicate 1 (or may indicate that it is a downlink DCI format).

The DAI field may be used at least for generating a codebook of HARQ-ACK information. V ^DL _T-DAI,m may be given based at least on the value of the DAI field. V ^DL _C-DAI,c,m may be given based at least on the value of the DAI field. V ^DL _T-DAI,m is also referred to as total DAI.

DCI format 2_0 may be used at least to indicate the slot format. The slot format may be information indicating the transmission direction (downlink, uplink, or XXX) for each of the OFDM symbols forming a certain slot. XXX may be indicating no transmission direction.

The control resource set may indicate the time domain and/or frequency domain to which one or more PDCCH candidates are mapped. The control resource set may be an area in which the terminal device 1 monitors the PDCCH. The control resource set may be composed of continuous resources (Localized resource). The control resource set may be composed of discontinuous resources.

-For each control resource set, the index of the control resource set, the number of OFDM symbols of the control resource set, and part or all of the set of resource blocks of the control resource set may be given.

The control resource set index may be used at least for identifying the control resource set.

The number of OFDM symbols in the control resource set may indicate the number of OFDM symbols to which the control resource set is mapped.

-The set of resource blocks of the control resource set may indicate the set of resource blocks to which the control resource set is mapped. The set of resource blocks of the control resource set may be given by a bitmap included in higher layer parameters. The bits included in the bitmap may correspond to 6 consecutive resource blocks.

The set of PDCCH candidates monitored by the terminal device 1 may be defined in terms of a search area set. That is, the set of PDCCH candidates monitored by the terminal device 1 may be given by the search region set.

The search area may be configured to include one or more PDCCH candidates of a certain aggregation level (Aggregation level). The aggregation level of PDCCH candidates may indicate the number of CCEs forming the PDCCH.

The search area set may be configured to include at least one or a plurality of search areas. The search region set may be configured to include one or more PDCCH candidates corresponding to each of one or more aggregation levels. The types of search area sets are a type 0 PDCCH common search area set (common search space set), a type 0a PDCCH common search area set, a type 1 PDCCH common search area set, a type 2 PDCCH common search area set, a type 3 PDCCH common search area set, and/ Alternatively, it may be one of the UE dedicated PDCCH search area sets.

The type 0 PDCCH common search area set, the type 0a PDCCH common search area set, the type 1 PDCCH common search area set, the type 2 PDCCH common search area set, and the type 3 PDCCH common search area set are also referred to as CSS sets (Common Search Space set). .. The UE dedicated PDCCH search area set is also referred to as a USS set (UE-specific Search Space set).

Each of the search area sets may be associated with a control resource set. Each of the search area sets may be at least included in the control resource set. For each search region set, an index of a control resource set associated with the search region set may be provided.

-A monitoring period periodicity may be set for each of the search area sets. The monitoring interval of the search area set may indicate at least the interval of slots in which the terminal device 1 monitors the search area set. The upper layer parameter indicating at least the monitoring interval of the search area set may be given for each search area set.

-A monitoring offset of the search area set may be set for each of the search area sets. The monitoring offset of the search area set may indicate at least the offset (offset) of the index of the slot in which the terminal apparatus 1 monitors the search area set from the reference index (for example, slot #0). The upper layer parameter indicating at least the monitoring offset of the search area set may be given for each search area set.

-A monitoring pattern of the search area set may be set for each of the search area sets. The search pattern of the search area set may indicate the leading OFDM symbol for the search area set to be monitored. The monitoring pattern of the search area set may be given by a bitmap showing the leading OFDM symbol in one or more slots. The upper layer parameter that indicates at least the monitoring pattern of the search area set may be given for each search area set.

The monitoring opportunity of the search area set is given based on at least some or all of the search interval of the search area set, the monitor offset of the search area set, the monitor pattern of the search area set, and/or the DRX setting. May be.

FIG. 5 is a diagram showing an example of a search area set monitoring opportunity according to an aspect of the present embodiment. In FIG. 5, a search area set 91 and a search area set 92 are set in the primary cell 301, a search area set 93 is set in the secondary cell 302, and a search area set 94 is set in the secondary cell 303.

In FIG. 5, a block indicated by a grid line indicates a search region set 91, a block indicated by a diagonal line rising to the right indicates a search region set 92, a block indicated by a diagonal line rising to the left indicates a search region set 93, and a horizontal line indicates. The block shown indicates the search area set 94.

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

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

The monitoring interval of the search area set 93 is set to 2 slots, the monitoring offset of the search area set 93 is set to 0 slot, and the monitoring pattern of the search area set 93 is [0,0,0,0,0,0, 0, 1, 0, 0, 0, 0, 0, 0] is set. That is, the monitoring opportunity of the search area set 93 is the eighth OFDM symbol (OFDM symbol #7) in each of the even slots.

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

The type 0 PDCCH common search area set may be used at least for a DCI format with a CRC (Cyclic Redundancy Check) sequence scrambled by SI-RNTI (System Information-Radio Network Temporary Identifier). The setting of the type 0 PDCCH common search area set may be given based on at least 4 bits of the LSB (Least Significant Bits) of the upper layer parameter PDCCH-ConfigSIB1. The upper layer parameter PDCCH-ConfigSIB1 may be included in the MIB. The setting of the type 0 PDCCH common search area set may be given based at least on the higher layer parameter SearchSpaceZero. The interpretation of the bits of the parameter SearchSpaceZero of the upper layer may be the same as the interpretation of the four bits of the LSB of the upper layer parameter PDCCH-ConfigSIB1. The setting of the type 0 PDCCH common search region set may be given based at least on the higher layer parameter SearchSpace SIB1. The upper layer parameter SearchSpace SIB1 may be included in the upper layer parameter PDCCH-ConfigCommon. The PDCCH detected in the type 0 PDCCH common search region set may be used at least for scheduling the PDSCH transmitted including the SIB1. SIB1 is a kind of SIB. SIB1 may include scheduling information of SIBs other than SIB1. The terminal device 1 may receive the upper layer parameter PDCCH-ConfigCommon in EUTRA. The terminal device 1 may receive the upper layer parameter PDCCH-ConfigCommon in the MCG.

The type 0a PDCCH common search area set may be used at least for a DCI format with a CRC (Cyclic Redundancy Check) sequence scrambled by SI-RNTI (System Information-Radio Network Temporary Identifier). The setting of the type 0a PDCCH common search area set may be given based at least on the upper layer parameter SearchSpaceOtherSystemInformation. The upper layer parameter SearchSpaceOtherSystemInformation may be included in SIB1. The upper layer parameter SearchSpaceOtherSystemInformation may be included in the upper layer parameter PDCCH-ConfigCommon. The PDCCH detected in the type 0 PDCCH common search region set may be used at least for scheduling the PDSCH transmitted including SIBs other than SIB1.

The type 1 PDCCH common search region set includes a CRC sequence scrambled by RA-RNTI (Random Access-Radio Network Temporary Identifier) and/or a CRC sequence scrambled by TC-RNTI (Temporary Cell-Radio Network Temporary Identifier). It may be used at least for the accompanying DCI format. RA-RNTI may be provided based at least on the time/frequency resource of the random access preamble transmitted by the terminal device 1. The TC-RNTI may be provided by the PDSCH (Random Access Message 2 or also referred to as Message 2) scheduled by the DCI format with the CRC sequence scrambled by RA-RNTI. The type 1 PDCCH common search region set may be provided based at least on the higher layer parameter ra-SearchSpace. The upper layer parameter ra-SearchSpace may be included in SIB1. The upper layer parameter ra-SearchSpace may be included in the upper layer parameter PDCCH-ConfigCommon.

The type 2 PDCCH common search area set may be used for a DCI format with a CRC sequence scrambled by a P-RNTI (Paging-Radio Network Temporary Identifier). The P-RNTI may be used at least for transmission in the DCI format including the information notifying the change of the SIB. The type 2 PDCCH common search region set may be provided based at least on the upper layer parameter PagingSearchSpace. The upper layer parameter PagingSearchSpace may be included in SIB1. The upper layer parameter PagingSearchSpace may be included in the upper layer parameter PDCCH-ConfigCommon.

The type 3 PDCCH common search area set may be used for a DCI format with a CRC sequence scrambled by a C-RNTI (Cell-Radio Network Temporary Identifier). The C-RNTI may be provided based at least on the PDSCH (message 4, also referred to as contention resolution) scheduled by the DCI format with the CRC sequence scrambled by the TC-RNTI. The type 3 PDCCH common search area set may be a search area set provided when the upper layer parameter SearchSpaceType is set to common.

The UE dedicated PDCCH search region set may be used at least for the DCI format with the CRC sequence scrambled by the C-RNTI.

When C-RNTI is given to the terminal device 1, the type 0 PDCCH common search region set, the type 0a PDCCH common search region set, the type 1 PDCCH common search region set, and/or the type 2 PDCCH common search region set are C-RNTI. It may be used at least for a DCI format with a scrambled CRC sequence.

When the C-RNTI is given to the terminal device 1, the upper layer parameter PDCCH-ConfigSIB1, the upper layer parameter SearchSpaceZero, the upper layer parameter SearchSpaceSIB1, the upper layer parameter SearchSpaceOtherSystemInformation, the upper layer parameter upper layer, or the upper layer parameter ra-search. The search region set provided at least based on any of the parameters PagingSearchSpace may be used at least for a DCI format with a CRC sequence scrambled with C-RNTI.

The common control resource set may include at least one or both of CSS and USS. The dedicated control resource set may include at least one or both of CSS and USS.

-The physical resources of the search area set are composed of control channel constituent units (CCE:Control Channel Element). The CCE is composed of 6 resource element groups (REG: Resource Element Group). The REG may be configured by one OFDM symbol of one PRB (Physical Resource Block). That is, the REG may be configured to include 12 resource elements (RE:Resource Element). The PRB is also simply referred to as an RB (Resource Block: resource block).

PDSCH is used at least for transmitting a transport block. PDSCH may be at least used for transmitting the random access message 2. The PDSCH may be used at least for transmitting system information including parameters used for initial access.

DL-SCH may be mapped to PDSCH.

The downlink physical signal may correspond to a set of resource elements. The downlink physical signal may not carry the information that occurs in higher layers. The downlink physical signal may be a physical signal used in the downlink carrier. In the wireless communication system according to the aspect of the present embodiment, at least some or all of the following downlink physical signals may be used.
・Synchronization signal (SS)
・DL DMRS (DownLink DeModulation Reference Signal)
・CSI-RS (Channel State Information-Reference Signal)
・DL PTRS (DownLink Phase Tracking Reference Signal)
・TRS (Tracking Reference Signal)

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

The SS block (SS/PBCH block) is configured to include at least part or all of PSS, SSS, and PBCH. Partial or total antenna ports of PSS, SSS, and PBCH included in the SS block may be the same. Part or all of PSS, SSS, and PBCH included in the SS block may be mapped to consecutive OFDM symbols. The CP settings of some or all of PSS, SSS, and PBCH included in the SS block may be the same. The setting μ of each subcarrier interval of PSS, SSS, and some or all of PBCH included in the SS block may be the same.

DL DMRS relates to the transmission of PBCH, PDCCH, and/or PDSCH. DL DMRS is multiplexed on PBCH, PDCCH, and/or PDSCH. The terminal device 1 may use the PBCH, the PDCCH, or the DL DMRS corresponding to the PDSCH in order to correct the propagation path of the PBCH, the PDCCH, or the PDSCH. Hereinafter, transmitting both the PBCH and the DL DMRS related to the PBCH is referred to as transmitting the PBCH. In addition, the transmission of the PDCCH and the DL DMRS associated with the PDCCH together is simply referred to as the transmission of the PDCCH. In addition, transmitting PDSCH and DL DMRS related to the PDSCH together is referred to as simply transmitting PDSCH. DL DMRS related to PBCH is also called DL DMRS for PBCH. The DL DMRS related to PDSCH is also called DL DMRS for PDSCH. The DL DMRS associated with the PDCCH is also referred to as the DL DMRS associated with the PDCCH.

DL DMRS may be a reference signal individually set in the terminal device 1. The DL DMRS sequence may be given based at least on the parameters individually set in the terminal device 1. The DL DMRS sequence may be provided based at least on a UE-specific value (for example, C-RNTI, etc.). DL DMRS may be transmitted separately for PDCCH and/or PDSCH.

CSI-RS may be a signal used at least for calculating channel state information. The CSI-RS pattern assumed by the terminal device may be given by at least upper layer parameters.

PTRS may be a signal used at least for compensation of phase noise. The PTRS pattern assumed by the terminal device may be provided based on at least the upper layer parameters and/or the DCI.

The DL PTRS may be associated with a DL DMRS group that includes at least the antenna ports used for one or more DL DMRSs. The association between the DL PTRS and the DL DMRS group may be that some or all of the antenna ports of the DL PTRS and the antenna ports included in the DL DMRS group are at least QCL. The DL DMRS group may be identified based on at least the antenna port with the smallest index in the DL DMRS included in the DL DMRS group.

The TRS may be a signal used at least for time and/or frequency synchronization. The TRS pattern assumed by the terminal device may be given based at least on upper layer parameters and/or DCI.

-The downlink physical channel and downlink physical signal are also referred to as downlink signals. The uplink physical channel and the uplink physical signal are also referred to as uplink signals. The downlink signal and the uplink signal are also collectively called a physical signal. The downlink signal and the uplink signal are also collectively referred to as a signal. The downlink physical channel and the uplink physical channel are generically called a physical channel. The downlink physical signal and the uplink physical signal are collectively referred to as a physical signal.

Explain the SS/PBCH block.

The SS/PBCH block may be configured to include at least part or all of PSS, SSS, and PBCH. The SS/PBCH block may be composed of four consecutive OFDM symbols. In the time domain, the PSS may be mapped to the first OFDM symbol of the SS/PBCH block. In the time domain, the SSS may be mapped to the third OFDM symbol of the SS/PBCH block. In the time domain, the PBCH may be mapped to the second OFDM symbol, the third OFDM symbol, and the fourth OFDM symbol of the SS/PBCH block.

The SS/PBCH block may be composed of 240 subcarriers. It may be mapped to the 57th to 183rd subcarriers in the frequency domain. In the frequency domain, the SSS may be mapped to the 57th to 183rd subcarriers. Zero may be set to the 56th subcarrier of the 1st OFDM symbol from the 1st subcarrier of the 1st OFDM symbol. From the 184th subcarrier of the 1st OFDM symbol, the 240th subcarrier of the 1st OFDM symbol may be set to zero. From the 49th subcarrier of the 3rd OFDM symbol to the 56th subcarrier of the 3rd OFDM symbol, zero may be set. Zeros may be set from the 184th subcarrier of the 3rd OFDM symbol to the 192nd subcarrier of the 3rd OFDM symbol. The PBCH may be mapped to subcarriers that are the first to 240th subcarriers of the second OFDM symbol and to which the DMRS related to the PBCH is not mapped. The PBCH may be mapped to subcarriers that are the 1st to 48th subcarriers of the 3rd OFDM symbol and to which the DMRS associated with the PBCH is not mapped. The PBCH may be mapped to the subcarriers from the 193rd subcarrier to the 240th subcarrier of the 3rd OFDM symbol, and the DMRS related to the PBCH is not mapped. The PBCH may be mapped to subcarriers that are the 1st to 240th subcarriers of the 4th OFDM symbol and to which the DMRS associated with the PBCH is not mapped.

BCH (Broadcast CHannel), UL-SCH (Uplink-Shared CHannel) and DL-SCH (Downlink-Shared CHannel) are transport channels. Channels used in the medium access control (MAC) layer are called transport channels. The unit of the transport channel used in the MAC layer is also called a transport block (TB) or MAC PDU. HARQ (Hybrid Automatic Repeat reQuest) is controlled for each transport block in the MAC layer. The transport block is a unit of data delivered by the MAC layer to the physical layer. In the physical layer, transport blocks are mapped to codewords, and modulation processing is performed for each codeword.

The base station device 3 and the terminal device 1 exchange (transmit/receive) signals of the upper layer in the higher layer. For example, the base station device 3 and the terminal device 1 may transmit and receive RRC signaling (RRC message:Radio Resource Control message, RRC information:Radio Resource Control information) in the radio resource control (RRC:Radio Resource Control) layer. .. Further, the base station device 3 and the terminal device 1 may transmit and receive MAC CE (Control Element) in the MAC layer. Here, RRC signaling and/or MAC CE is also referred to as higher layer signaling.

PUSCH and PDSCH may at least be used for transmitting RRC signaling and/or MAC CE. Here, the RRC signaling transmitted from the base station device 3 on the PDSCH may be common signaling to the plurality of terminal devices 1 in the serving cell. Signaling common to the plurality of terminal devices 1 in the serving cell is also referred to as common RRC signaling. The RRC signaling transmitted from the base station apparatus 3 on the PDSCH may be dedicated signaling (also referred to as “dedicated signaling” or “UE specific signaling”) to a certain terminal apparatus 1. Signaling dedicated to the terminal device 1 is also called dedicated RRC signaling. Upper layer parameters unique to the serving cell may be transmitted using common signaling to a plurality of terminal devices 1 in the serving cell or dedicated signaling to a certain terminal device 1. UE-specific upper layer parameters may be transmitted to a certain terminal device 1 by using dedicated signaling.

BCCH (Broadcast Control CHannel), CCCH (Common Control CHannel), and DCCH (Dedicated Control CHannel) are logical channels. For example, BCCH is an upper layer channel used for transmitting MIB. CCCH (Common Control Channel) is an upper layer channel used for transmitting common information in a plurality of terminal devices 1. Here, the CCCH may be used for the terminal device 1 that is not RRC connected, for example. Further, the DCCH (Dedicated Control Channel) is an upper layer channel used at least for transmitting dedicated control information to the terminal device 1. Here, the DCCH may be used for the terminal device 1 that is RRC-connected, for example.

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

UL-SCH in the transport channel may be mapped to PUSCH in the physical channel. The DL-SCH in the transport channel may be mapped to the PDSCH in the physical channel. The BCH in the transport channel may be mapped to the PBCH in the physical channel.

Hereinafter, a configuration example of the terminal device 1 according to one aspect of the present embodiment will be described.

FIG. 6 is a schematic block diagram showing the configuration of the terminal device 1 according to an aspect of the present embodiment. As illustrated, the terminal device 1 is configured to include a wireless transmission/reception unit 10 and an upper layer processing unit 14. The wireless transmission/reception unit 10 includes at least an antenna unit 11, an RF (Radio Frequency) unit 12, and a part or all of a baseband unit 13. The upper layer processing unit 14 is configured to include at least part or all of the medium access control layer processing unit 15 and the radio resource control layer processing unit 16. The wireless transmission/reception unit 10 is also referred to as a transmission unit, a reception unit, or a physical layer processing unit. The wireless transmission/reception unit 10 may be configured to include a transmission unit and/or a reception unit.

The upper layer processing unit 14 outputs the uplink data (transport block) generated by the user's operation or the like to the wireless transmission/reception unit 10. The upper layer processing unit 14 processes the MAC layer, the packet data integration protocol (PDCP: Packet Data Convergence Protocol) layer, the radio link control (RLC: Radio Link Control) layer, and the RRC layer.

The medium access control layer processing unit 15 included in the upper layer processing unit 14 processes the MAC layer.

The radio resource control layer processing unit 16 included in the upper layer processing unit 14 performs processing of the RRC layer. The radio resource control layer processing unit 16 manages various setting information/parameters of its own device. The radio resource control layer processing unit 16 sets various setting information/parameters based on the upper layer signal received from the base station device 3. That is, the radio resource control layer processing unit 16 sets various setting information/parameters based on the information indicating various setting information/parameters received from the base station device 3. The parameter may be an upper layer parameter.

The wireless transmission/reception unit 10 performs physical layer processing such as modulation, demodulation, encoding, and decoding. The wireless transmission/reception unit 10 may include a wireless reception unit and a wireless transmission unit. The wireless transmission/reception unit 10 (or wireless reception unit) separates, demodulates, and decodes the received physical signal, and outputs the decoded information to the upper layer processing unit 14. The wireless transmission/reception unit 10 (or the wireless transmission unit) generates a physical signal by modulating, encoding, and generating a baseband signal (conversion into a time continuous signal), and transmits the physical signal to the base station device 3. The wireless transmission/reception unit 10 may perform carrier sense.

The RF unit 12 converts a signal received via the antenna unit 11 into a baseband signal by quadrature demodulation (down conversion: down convert) and removes unnecessary frequency components. The RF unit 12 outputs the processed analog signal to the baseband unit.

The baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal. The baseband unit 13 removes a portion corresponding to CP (Cyclic Prefix) from the converted digital signal, performs a fast Fourier transform (FFT: Fast Fourier Transform) on the signal from which the CP is removed, and obtains a frequency domain signal Extract.

The baseband unit 13 performs an Inverse Fast Fourier Transform (IFFT) on the data to generate an OFDM symbol, adds CP to the generated OFDM symbol, generates a baseband digital signal, and generates a baseband signal. The band digital signal is converted into an analog signal. The baseband unit 13 outputs the converted analog signal to the RF unit 12.

The RF unit 12 uses a low-pass filter to remove excess frequency components from the analog signal input from the baseband unit 13, upconverts the analog signal to a carrier frequency, and transmits it via the antenna unit 11. To do. Further, the RF unit 12 amplifies the power. Further, the RF unit 12 may have a function of controlling transmission power. The RF unit 12 is also referred to as a transmission power control unit.

Hereinafter, a configuration example of the base station device 3 according to one aspect of the present embodiment will be described.

FIG. 7 is a schematic block diagram showing the configuration of the base station device 3 according to an aspect of the present embodiment. As illustrated, the base station device 3 is configured to include a wireless transmission/reception unit 30 and an upper layer processing unit 34. The wireless transmission/reception unit 30 includes an antenna unit 31, an RF unit 32, and a baseband unit 33. The upper layer processing unit 34 includes a medium access control layer processing unit 35 and a radio resource control layer processing unit 36. The wireless transmission/reception unit 30 is also referred to as a transmission unit, a reception unit, or a physical layer processing unit.

The upper layer processing unit 34 processes the MAC layer, PDCP layer, RLC layer, and RRC layer.

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

The radio resource control layer processing unit 36 included in the upper layer processing unit 34 performs processing of the RRC layer. The radio resource control layer processing unit 36 generates downlink data (transport block) arranged on the PDSCH, system information, RRC message, MAC CE, or the like, or acquires from the upper node and outputs to the radio transmission/reception unit 30. .. Further, the radio resource control layer processing unit 36 manages various setting information/parameters of each terminal device 1. The radio resource control layer processing unit 36 may set various setting information/parameters for each terminal device 1 via a signal of an upper layer. That is, the radio resource control layer processing unit 36 transmits/notifies information indicating various setting information/parameters.

The function of the wireless transmission/reception unit 30 is the same as that of the wireless transmission/reception unit 10, and thus description thereof is omitted.

Each of the units 10 to 16 provided in the terminal device 1 may be configured as a circuit. Each of the units denoted by reference numerals 30 to 36 included in the base station device 3 may be configured as a circuit. A part or all of the units denoted by reference numerals 10 to 16 included in the terminal device 1 may be configured as a memory and a processor connected to the memory. A part or all of the units denoted by reference numerals 30 to 36 included in the base station device 3 may be configured as a memory and a processor connected to the memory. Various aspects (operations and processes) according to the present embodiment may be realized (performed) in the memory included in the terminal device 1 and/or the base station device 3 and the processor connected to the memory.

Random access message 2 may include one or more random access responses. The random access response (RAR: Random Access Response) may include an uplink grant field and a TC-RNTI field. The uplink grant included in the random access response is also called a random access response grant.

FIG. 8 is a diagram showing an example of fields included in the random access message 2 according to an aspect of the present embodiment. The MAC PDU may include one or more random access responses. In FIG. 8, MAC RAR indicates a random access response. Also, the MAC PDU includes one MAC header, n random access responses, and padding. Further, one MAC header includes n E/T/RAPID subheaders (E/T/RAPID fields).

The E/T/RAPID subheader includes at least an E field (Extension field), a T field (Type field), and a RAPID field (Random Access Preamble Identifier field). The E field is used to indicate whether or not another E/T/RAPID subheader is set after the E/T/RAPID subheader including the E field. The first E field may be set to 1 if at least another E/T/RAPID subheader is set after the E/T/RAPID subheader containing the first E field. The first E field may be set to 0 when no other E/T/RAPID subheader is set after the E/T/RAPID subheader including the first E field.

The T field is a flag for indicating whether the MAC subheader includes the RAPID field or the backoff indicator field. The T field may be set to 1 to indicate that the RAPID field is included in the MAC subheader. Also, the T field may be set to 0 to indicate that the MAC subheader contains a backoff indicator field. That is, it may be indicated that the MAC subheader includes the RAPID field or the backoff indicator field based on the value of the T field.

The RAPID field may be used to identify the transmitted random access preamble. In the other random access procedure, when the index of the random access preamble of the transmitted PRACH and the index included in the RAPID field included in a certain E/T/RAPID subheader are equal, the terminal device 1 has successfully received the random access response. Therefore, the MAC RAR corresponding to the certain E/T/RAPID subheader may be processed.

The MAC RAR includes an R field, a timing advance command field, an uplink grant field, and a TC-RNTI field. The R field is a reserved bit. Further, the timing advance command field indicates a TA value (Timing advance value) used to control the amount of timing adjustment for transmission of an uplink signal (for example, PUCCH, PUSCH, SRS, etc.). The uplink grant field (random access response grant) is used to indicate the PUSCH resource.

The random access response grant is configured to include at least part or all of the following 5A to 5F.
5A) Frequency hopping flag field 5B) Frequency domain resource allocation field 5C) Uplink time domain resource allocation field 5D) MCS field 5E) TPC (Transmit power control) command field 5F) Second CSI request field (second CSI request field) )

The TPC command field may be used to control (determine or adjust) the transmission power of PUSCH scheduled by the random access response grant.

The second CSI request field is used at least to indicate the CSI report. The size of the second CSI request field may be 1 bit. That is, N _TS for the second CSI request field may be one.

For example, when the bit of the second CSI request field indicates 0, the CSI request may not be triggered by the second CSI request field. Also, if the bit of the second CSI request field indicates 1, a CSI request for a CSI report may be triggered by the second CSI request field.

A CSI report for a given index may be triggered if the second CSI request field is one. For example, a CSI report with an index of 0 may be triggered if the second CSI request field indicates 1. Further, when the second CSI request indicates 1, the CSI report with the smallest index among the N _REP CSI reports may be triggered. In addition, when the second CSI request indicates 1, the CSI report with the largest index among the N _REP CSI reports may be triggered.

The CSI report triggered when the second CSI request field is 1 may be given by the command of MAC CE. For example, the command of the second MAC CE may indicate which CSI report is triggered by the second CSI request field. The command of the second MAC CE may be the command of the first MAC CE. The command of the second MAC CE may be a command of the MAC CE different from the command of the first MAC CE.

For example, if N _REP is greater than 1, then the second CSI request field may not trigger a CSI report. Also, if N _REP is greater than 1, the second CSI request field may be reserved. Also, when N _REP is 1, the second CSI request field may not be reserved.

For example, if N _REP is 0, the second CSI request field may not trigger a CSI report. If N _REP is 0, the second CSI request field may be reserved.

_{(If N TS} is 0,2,3,4,5 or 6) if N _TS is other than 1, CSI reported by the second CSI request field may not be triggered. N _{(if N TS} is 0,2,3,4,5 or 6) _TS cases other than 1, the second CSI request field may be reserved. When the second CSI request field is reserved, the terminal device 1 may ignore the second CSI request field or discard the second CSI request field.

The base station device 3 may set a bit of the reserved second CSI request field to a predetermined value (0 or 1). In this case, the terminal device 1 may check whether or not the reserved bit of the second CSI request field is set to a predetermined value (0 or 1).

If _NTS is 1, then the second CSI request field may not be reserved.

If N _TS is 1 and N _REP is greater than 1 (2̂N _TS −1), the command of the second MAC CE determines which CSI report is triggered by the second CSI request field. May be shown. The command of the second MAC CE may be the command of the first MAC CE. The command of the second MAC CE may be a command of the MAC CE different from the command of the first MAC CE.

If N _TS is 1 and N _REP is 1 (2^N _TS −1), then N _REP CSI reports correspond to the non-zero codepoint (1) of the second CSI request field. May be.

FIG. 9 is a diagram showing an example of the relationship between a CSI request and a CSI-RS resource according to an aspect of this embodiment. The downlink physical channel 9000 is either a PDCCH transmitted including a DCI format including a first CSI request field or a PDSCH transmitted including a random access response grant including a second CSI request field. is there. Also, the CSI-RS 9001 is a CSI-RS used for a CSI report triggered based on at least the CSI request 9000. Moreover, PUSCH9002 is transmitted including the CSI report triggered based on at least CSI request 9000. A Gap 9003 indicates a gap between the last OFDM symbol to which the downlink physical channel 9000 is mapped and the first OFDM symbol to which CSI-RS9001 is mapped. The gap may be given by the number of OFDM symbols. A gap 9004 indicates a gap between the last OFDM symbol to which the downlink physical channel 9000 is mapped and the first OFDM symbol of the PUSCH 9002.

For example, based on at least that the gap 9003 is smaller than the first value, a CSI-RS9001 and QCL downlink signal may be provided. For example, when the gap 9003 is smaller than the first value, and another downlink signal is received in at least one of the OFDM symbols to which the CSI-RS9001 is mapped, the CSI-RS9001 and the other downlink are received. The signal may be QCL. Further, when the gap 9003 is smaller than the first value and no other downlink signal is received in any of the OFDM symbols to which the CSI-RS9001 is mapped, the CSI-RS9001 and the QCL downlink signal are received. May be indicated by an upper layer parameter including the setting of the CSI-RS9001. The first value may be included in the function information reported by the terminal device 1.

For example, the downlink physical channel 9000 is a PDCCH transmitted including the DCI format including the first CSI request field, the gap 9003 is smaller than the first value, and the CSI-RS9001 is mapped to the OFDM symbol. When another downlink signal is received in at least one of the above, CSI-RS9001 and the other downlink signal may be QCL. Further, the downlink physical channel 9000 is a PDCCH transmitted including the DCI format including the first CSI request field, the gap 9003 is smaller than the first value, and the CSI-RS9001 is mapped to the OFDM symbol. When no other downlink signal is received in any of the above, the CSI-RS9001 and QCL downlink signal may be indicated by an upper layer parameter including the setting of the CSI-RS9001.

For example, the downlink physical channel 9000 is the PDSCH transmitted including the random access response grant including the second CSI request field, the gap 9003 is smaller than the second value, and the CSI-RS9001 is mapped. When another downlink signal is received in at least one of the OFDM symbols, the CSI-RS9001 and the other downlink signal may be QCL. Further, the downlink physical channel 9000 is the PDSCH transmitted including the random access response grant including the second CSI request field, the gap 9003 is smaller than the second value, and CSI-RS9001 is mapped. When another downlink signal is not received in any of the OFDM symbols, the CSI-RS9001 and QCL downlink signal may be indicated by an upper layer parameter including the setting of the CSI-RS9001. The second value may be included in the function information reported by the terminal device 1.

The setting μ of the subcarrier interval for the PUSCH scheduled by the random access response grant may be equal to the subcarrier interval set in the uplink BWP to which the PRACH transmitted by the terminal device 1 is mapped. The subcarrier interval setting μ for the PUSCH scheduled by the random access response grant may be given based on the subcarrier interval setting set in the active uplink BWP. The subcarrier interval setting μ for the PUSCH scheduled by the random access response grant may be given based at least on the uplink BWP subcarrier interval setting μ to which the PUSCH is mapped.

Hereinafter, aspects of various devices according to one aspect of the present embodiment will be described.

(1) In order to achieve the above object, the embodiments of the present invention take the following means. That is, the first aspect of the present invention is a terminal device, a receiving unit that receives a random access response and a DCI format, and a PUSCH scheduled based on at least a random access response grant included in the random access response. And a bit number of the second CSI request field included in the random access response grant is 1 and the number of bits of the first CSI request field set in the DCI format is 1. If it indicates 1, the PUSCH is transmitted including a CSI report, and if the number of bits of the first CSI request field set in the DCI format is other than 1, the second CSI request field is reserved. ..

(2) Further, a second aspect of the present invention is a base station apparatus, which is based on at least a random access response and a transmitter that transmits a DCI format, and a random access response grant included in the random access response. A second CSI request included in the random access response grant, wherein the number of bits of the first CSI request field set in the DCI format is 1, and the receiving unit receives a PUSCH to be scheduled. When the bit of the field indicates 1, the PUSCH is transmitted including the CSI report, and when the number of bits of the first CSI request field set in the DCI format is other than 1, the second CSI request field is set. Is reserved.

A program that operates in the base station device 3 and the terminal device 1 according to the present invention controls a CPU (Central Processing Unit) and the like (functions a computer so as to realize the functions of the above-described embodiments related to the present invention. Program). 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). If necessary, the CPU reads, corrects and writes.

The terminal device 1 and a part of the base station device 3 in the above-described embodiment may be realized by a computer. In that case, the program for realizing the control function may be recorded in a computer-readable recording medium, and the program recorded in the recording medium may be read by a computer system and executed.

The “computer system” mentioned here is a computer system built in the terminal device 1 or the base station device 3, and includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in a computer system.

Further, the "computer-readable recording medium" means a program that dynamically holds a program for a short time, such as a communication line when the program is transmitted through a network such as the Internet or a communication line such as a telephone line. In such a case, a volatile memory inside a computer system that serves as a server or a client may hold the program for a certain period of time. Further, the program may be one for realizing some of the functions described above, or may be one that can realize 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 forming the device group may include a part or all of the functions or function blocks of the base station device 3 according to the above-described embodiment. It suffices that each device group has one or more functions or each functional block of the base station device 3. Further, the terminal device 1 according to the above-described embodiment can also communicate with the base station device as an aggregate.

The base station device 3 in the above-described embodiments may be EUTRAN (Evolved Universal Terrestrial Radio Access Network) and/or NG-RAN (Next Gen RAN, NR RAN). Further, the base station device 3 in the above-described embodiment may have a part or all of the functions of the upper node with respect to the eNodeB and/or the gNB.

Further, part or all of the terminal device 1 and the base station device 3 in the above-described embodiments may be realized as an LSI which is typically an integrated circuit, or may be realized as a chip set. Each functional block of the terminal device 1 and the base station device 3 may be individually made into a chip, or a part or all of them may be integrated into a chip. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when a technique for forming an integrated circuit that replaces LSI appears with the progress of semiconductor technology, it is also possible to use an integrated circuit according to the technique.

Further, in the above-described embodiment, the terminal device is described as an example of the communication device, but the present invention is not limited to this, a stationary type electronic device installed indoors or outdoors, or an immovable electronic device, For example, it can be applied to terminal devices or communication devices such as AV equipment, kitchen equipment, cleaning/laundry equipment, air conditioning equipment, office equipment, vending machines, and other household appliances.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and includes design changes and the like within a range not departing from the gist of the present invention. Further, the present invention can be variously modified within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. Be done. Further, a configuration in which elements described in each of the above embodiments and having the same effect are replaced with each other is also included.

Claims (4)

1. A receiving unit for receiving the random access response and the DCI format,
   A transmission unit that transmits a PUSCH scheduled based on at least a random access response grant included in the random access response,
   If the number of bits of the first CSI request field set in the DCI format is 1 and the number of bits of the second CSI request field included in the random access response grant indicates 1, the PUSCH reports a CSI report. Sent with
   The terminal device in which the second CSI request field is reserved when the number of bits of the first CSI request field set to the DCI format is other than 1.
2. A transmission unit for transmitting a random access response and a DCI format,
   A receiving unit for receiving a PUSCH scheduled at least based on a random access response grant included in the random access response,
   When the number of bits of the first CSI request field set in the DCI format is 1 and the number of bits of the second CSI request field included in the random access response grant indicates 1, the PUSCH reports a CSI report. Sent with
   A base station apparatus, wherein when the number of bits of the first CSI request field set in the DCI format is other than 1, the second CSI request field is reserved.
3. A communication method used in a terminal device,
   Receiving a random access response and a DCI format,
   Transmitting PUSCH scheduled based on at least a random access response grant included in the random access response,
   When the number of bits of the first CSI request field set in the DCI format is 1 and the number of bits of the second CSI request field included in the random access response grant indicates 1, the PUSCH reports a CSI report. Sent with
   A communication method in which the second CSI request field is reserved when the number of bits of the first CSI request field set to the DCI format is other than 1.
4. A communication method used for a base station device, comprising:
   Transmitting a random access response and a DCI format,
   Receiving a PUSCH scheduled based at least on a random access response grant included in the random access response,
   If the number of bits of the first CSI request field set in the DCI format is 1 and the number of bits of the second CSI request field included in the random access response grant indicates 1, the PUSCH reports a CSI report. Sent with
   A communication method in which the second CSI request field is reserved when the number of bits of the first CSI request field set to the DCI format is other than 1.

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