WO2020166470A1 - Terminal device, base station device, and communication method - Google Patents

Abstract

The present invention enables efficient transmission and reception of HARQ-ACK. This terminal device receives a list of timings of PDSCH and HARQ-ACK, sets HARQ-ACK that is standing by to HARQ-ACK corresponding to candidate PDSCH reception of a slot corresponding to a specific timing in the list, and transmits a HARQ-ACK codebook corresponding to the list.

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. 2019-24512 filed in Japan on February 14, 2019, the contents of which are incorporated herein by reference.

The wireless access method and 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: 3rd Priority). 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 a cell shape. A single base station device may manage a plurality of serving cells.

In 3GPP, to consider the next-generation standard (NR: New Radio) in order to propose to IMT (International Telecommunications)-2020, which is a standard of the next-generation mobile communication system established by the International Telecommunications Union (ITU). Is performed (Non-Patent Document 1). In the framework of a single technology, NR can meet three requirements of eMBB (enhanced MobileBroadBand), mMTC (massive MachineType Communication), and URLLC (UltraReliableandLowCommunication). There is.

Also, the application of NR in the unlicensed frequency band (Unlicensed Spectrum) is being studied (Non-Patent Document 2). It is considered to apply a NR supporting a wide band of 100 MHz to a carrier in an unlicensed frequency band to realize a data rate of several Gbps.

∙ The length of time that can be continuously used for communication in the unlicensed frequency band is defined by a rule. 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 including a processor and a memory storing a computer program code, wherein when the computer program code is executed by the processor, PDSCH and HARQ-ACK. And a HARQ-ACK in the waiting state is set to the HARQ-ACK corresponding to the candidate PDSCH reception of the slot corresponding to the specific timing in the list, and the HARQ corresponding to the list. -Send ACK codebook and execute the operation including.

(2) Furthermore, receiving a HARQ indication field having a value indicating holding a HARQ-ACK at a certain COT to put the HARQ-ACK in a standby state, and the HARQ waiting at the next COT. Performing an action including sending an ACK.

(3) A second aspect of the present invention is a base station apparatus including a processor and a memory storing a computer program code, wherein when the computer program code is executed by the processor, PDSCH and HARQ- Corresponding to the list, transmitting a list of timings with ACK, and HARQ-ACK waiting for transmission is set to HARQ-ACK corresponding to reception of candidate PDSCH of slot corresponding to a specific timing of the list Perform an operation including receiving a HARQ-ACK codebook that does and determining the HARQ-ACK.

(4) Furthermore, by transmitting a HARQ indication field having a value indicating holding a HARQ-ACK at a certain COT, the transmission of the HARQ-ACK is put into a standby state, and the HARQ waiting at the next COT is transmitted. Performing an operation including receiving an ACK.

(5) A third aspect of the present invention is a communication method used in a terminal device, comprising the step of receiving a list of timings of PDSCH and HARQ-ACK, and specifying the waiting HARQ-ACK in the list. The step of setting HARQ-ACK corresponding to the reception of the candidate PDSCH of the slot corresponding to the timing of, and the step of transmitting the HARQ-ACK codebook corresponding to the list.

(6) Further, receiving a HARQ indication field of a value indicating holding a HARQ-ACK at a certain COT and putting the HARQ-ACK in a standby state, and the HARQ waiting at the next COT. -Transmitting an ACK.

(7) A fourth aspect of the present invention is a communication method used in a base station apparatus, comprising: transmitting a list of timings of PDSCH and HARQ-ACK; and HARQ-ACK waiting for transmission. A step of receiving a HARQ-ACK codebook corresponding to the list, which is set to a HARQ-ACK corresponding to reception of a candidate PDSCH of a slot corresponding to a specific timing of the list, and a step of determining the HARQ-ACK. Including.

(8) Further, transmitting a HARQ indication field having a value indicating holding a HARQ-ACK at a certain COT to put the HARQ-ACK in a standby state, and the HARQ waiting at the next COT. Receiving an ACK.

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 _among N ^slot _symb , subcarrier interval setting μ, slot setting, 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. 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 explaining an example of transmission of HARQ-ACK information in an embodiment of the present invention. It is a figure explaining an example of transmission of HARQ-ACK information in an embodiment of the present invention. It is a figure explaining an example of transmission of HARQ-ACK information in an embodiment of the present invention.

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”.

The fact that the parameter or information indicates one or more values may mean that the parameter or information includes at least the parameter or information indicating the one or more values. The upper layer parameter may be a single upper layer parameter. The upper layer parameter may be an information element (IE: Information Element) including a plurality of parameters.

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 (gNB). Hereinafter, the terminal devices 1A to 1C are also referred to as the terminal device 1 (UE).

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 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 MCG may be configured to include one or a plurality of SCells (Secondary Cells). The SCG may be configured to include one or more SCells. The serving cell identifier (serving cell identity) is a short identifier for identifying the serving cell. The serving cell identifier may be given by an upper layer parameter.

The following describes the frame structure.

In the wireless communication system according to one aspect of the present embodiment, at least OFDM (Orthogonal Frequency Division Multiplex) is used. An OFDM symbol is a time domain unit of OFDM. The OFDM symbol includes at least one or a plurality of subcarriers. The OFDM symbol may be converted into a time-continuous signal in baseband signal generation.

The subcarrier spacing (SCS: SubCarrier Spacing) may be given by the subcarrier spacing Δf=2 ^μ ·15 kHz. For example, the subcarrier spacing configuration μ may be set to any of 0, 1, 2, 3, 4, and/or 5. For a certain BWP (BandWidth 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, a time unit (time unit) T _c is 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 on the downlink and/or transmission on the uplink is composed of a 10 ms frame. 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 frame setting may be given regardless of μ. The length of the subframe may be given regardless of the subcarrier spacing Δf. That is, the subframe setting 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 first slot number n ^μ _s may be given in ascending order within 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. For example, the second slot numbers n ^μ _s,f may be given in ascending order within 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. The N ^slot _symb may be provided based at least on part or all of the slot configuration and/or the CP (Cyclic Prefix) configuration. The slot settings may be given at least by the upper layer parameter tdd-UL-DL-ConfigurationCommon. CP settings may be provided based at least on higher layer parameters. CP settings may be provided based at least on dedicated RRC signaling. The first slot number and the second slot number are also referred to as slot numbers (slot index).

FIG. 2 is an example showing a relationship _among N ^slot _symb , subcarrier interval setting μ, slot setting, and CP setting according to an aspect of the present embodiment. In FIG. 2A, when the slot setting is 0, the subcarrier spacing 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, when the slot setting is 0, 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 N ^slot _symb in slot setting 0 may correspond to twice the N ^slot _symb in slot setting 1.

The physical resources are explained below.

ㆍAn antenna port is 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 characteristic (large scale property) of the channel through which the symbol is transmitted in one antenna port can be estimated from the channel through which the symbol is transmitted in the other antenna port, the two antenna ports have QCL (Quasi Co-Located) ) Is called. The large-scale characteristic may include at least a long-term characteristic of the channel. The large-scale characteristics are delay spread (delay spread), Doppler spread (Doppler spread), Doppler shift (Doppler shift), average gain (average gain), average delay (average delay), and aer parameter (sputter), beam parameter (spati). 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 of N ^μ _RB,x N ^RB _sc subcarriers and N ^(μ) _symb N ^subframe, _μsymb OFDM symbols is provided for each subcarrier spacing setting and carrier set, respectively. N ^μ _RB,x may indicate the number of resource blocks provided for setting μ of the subcarrier spacing for carrier x. N ^μ _RB,x may be the maximum number of resource blocks provided for setting μ of the subcarrier spacing for carrier x. The carrier x indicates either a downlink carrier or an uplink carrier. That is, x is “DL” or “UL”. N ^μ _RB is a name including N ^μ _{RB, DL} and/or N ^μ _{RB, UL} . N ^RB _sc may indicate the number of subcarriers included in one resource block. At least one resource grid may be provided for each antenna port p, and/or for each setting μ of subcarrier spacing, and/or for each setting of a transmission direction (Transmission direction). The transmission direction includes at least a downlink (DL: DownLink) and an 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).

Each element in the resource grid provided for each first radio parameter set is called a resource element. The resource element is specified by the index _ksc in the frequency domain and the index _lsym in the time domain. For a certain first radio parameter set, the resource element is specified by 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 ^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 based at least on upper layer parameters and/or some or all of the DCI. BWP is also called a band part (BP: Bandwidth Part). That is, the terminal device 1 may not be instructed to perform transmission/reception using all the sets of the resource grid. That is, the terminal device 1 may be instructed to perform transmission/reception by using some 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.

One or more downlink BWPs may be set for the terminal device 1. The terminal device 1 may try to receive a physical channel (for example, PDCCH, PDSCH, SS/PBCH, etc.) in one downlink BWP of one or a plurality of downlink BWPs. The one downlink BWP is also referred to as an activated downlink BWP.

One or more uplink BWPs may be set for the terminal device 1. The terminal device 1 may attempt transmission of a physical channel (for example, PUCCH, PUSCH, PRACH, etc.) in one uplink BWP of one or a plurality of uplink BWPs. The one uplink BWP is also referred to as an activated uplink BWP.

A downlink BWP set may be set for each serving cell. The set of downlink BWPs may include one or more downlink BWPs. A set of uplink BWP may be set for each of the serving cells. The set of uplink BWPs may include one or more uplink BWPs.

The upper layer parameter is a parameter 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 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) BCCH Logical Channel or Feature C2 mapped to CCCH Logical Channel C2) Feature C3) Mapped to PBCH that contains at least the radioResourceConfigCommon information element.

The radioResourceConfigCommon information element may include information indicating the 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.

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 D2) mapped to DCCH logical channel at least including radioResourceConfigDedicated information element

The radioResourceConfigDedicated information element may include at least information indicating a setting unique to the terminal device 1. The radioResourceConfigDedicated information element may include at least information indicating the setting of BWP. The BWP settings may at least indicate frequency resources of the BWP.

For example, the MIB, the first system information, and the second system information may be included in the common RRC signaling. In addition, a higher layer message that is mapped to the DCCH logical channel and that includes at least radioResourceConfigCommon may be included in the common RRC signaling. Also, an upper layer message that is mapped to the DCCH logical channel and does not include the radioResourceConfigCommon information element may be included in the dedicated RRC signaling. In addition, a higher-layer message that is mapped to the DCCH logical channel and that includes at least the radioResourceConfigDedicated information element may be included in the dedicated RRC signaling.

The first system information may at least indicate the time index of the SS (Synchronization Signal) block. The SS block (SS block) is also called an SS/PBCH block (SS/PBCH block). The SS/PBCH block is also called SS/PBCH. The first system information may include at least information related to PRACH resources. The first system information may include at least information related to setting up an initial connection. The second system information may be system information other than the first system information.

The radioResourceConfigDedicated information element may include at least information related to the PRACH resource. The radioResourceConfigDedicated information element may include at least information related to the setting of the initial connection.

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

The uplink physical channel may correspond to a set of resource elements that carry information occurring in higher layers. The uplink physical channel is a physical channel used in the 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 are 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 channel state information (CSI: Channel State Information), scheduling request (SR: Scheduling Request), transport block (TB: Transport port block,  MAC PDU: Medium Access Control DataProtocolCH, Data Priority Data Delta Data). -Shared Channel, PDSCH: Includes a part or all of HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) corresponding to Physical Downlink Shared Channel.

HARQ-ACK may include at least HARQ-ACK bits (HARQ-ACK information) corresponding to at least one transport block. The HARQ-ACK bit may indicate ACK (acknowledgement) or NACK (negative-acknowledgement) corresponding to one or more transport blocks. HARQ-ACK may include at least a HARQ-ACK codebook (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. The HARQ-ACK bit may indicate ACK or NACK corresponding to one CBG (Code Block Group) included in the transport block.

A scheduling request (SR: Scheduling Request) may be used at least to request a PUSCH resource for initial 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 a scheduling request is triggered by an upper layer. 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 channel state information may include at least part or all of a channel quality index (CQI: Channel Quality Indicator), a precoder matrix index (PMI: Precoder Matrix Indicator), and a rank index (RI: Rank Indicator). CQI is an index related to channel quality (for example, propagation strength), and PMI is an index indicating a precoder. The RI is an index indicating the transmission rank (or the number of transmission layers).

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

PUSCH is used at least for transmitting transport blocks (TB, MAC PDU, UL-SCH, PUSCH). PUSCH may be used to transmit at least some or all of transport blocks, HARQ-ACKs, channel state information, and scheduling requests. PUSCH is used at least for transmitting the random access message 3.

PRACH is used at least for transmitting the random access preamble (random access message 1). PRACH is an initial connection establishment (initial connection establishment) procedure, a handover procedure, a connection re-establishment (connection re-establishment) procedure, synchronization for PUSCH transmission (timing adjustment), and part or all of the resource request for PUSCH. May be used at least to indicate 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.

In FIG. 1, the following uplink physical signals are used in uplink wireless communication. The uplink physical signal is used by the physical layer, although it may not be used to transmit the information output from the upper layer.
・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 SRS may not be related to the transmission of PUSCH or PUCCH. The base station device 3 may use SRS for measuring the channel state. 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. UL PTRS may be associated with a UL DMRS group that includes at least antenna ports used for one or more UL DMRSs. The association between the UL PTRS and the UL DMRS group may be that some or all of the antenna ports of the UL PTRS and the antenna ports included in the UL DMRS group are at least QCL. The UL DMRS group may be identified based on at least the antenna port with the smallest index in the UL DMRS included in the UL DMRS group. UL PTRS may be mapped to the antenna port with the smallest index in one or more antenna ports to which one codeword is mapped. The UL PTRS may be mapped to the first layer when one codeword is at least mapped to the first layer and the second layer. UL PTRS may not be mapped to the second layer. The index of the antenna port to which the UL PTRS is mapped may be given based at least on the downlink control information.

In FIG. 1, the following downlink physical channels are used in downlink radio communication from the base station device 3 to the terminal device 1. The downlink physical channel is used by the physical layer to transmit information output from higher layers.
・PBCH (Physical Broadcast Channel)
・PDCCH (Physical Downlink Control Channel)
・PDSCH (Physical Downlink Shared Channel)

PBCH is used at least for transmitting a master information block (MIB: Master Information Block, BCH, Broadcastcast Channel). 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 synchronization signal. 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 PDCCH is used at least for transmission of downlink control information (DCI: Downlink Control Information). The PDCCH may be transmitted including at least downlink control information. The PDCCH may include downlink control information. The downlink control information is also called a DCI format. The downlink control information may include at least either a downlink grant or an uplink grant. The DCI format used for PDSCH scheduling is also referred to as downlink DCI format. The DCI format used for PUSCH scheduling is also called an uplink DCI format. The downlink grant is also called a downlink assignment or a downlink allocation. The uplink DCI format includes at least one or both of DCI format 0_0 and DCI format 0_1.

The DCI format 0_0 includes at least part or all of 1A to 1F.
1A) DCI format specific field (Identifier for DCI formats field)
1B) Frequency domain resource allocation field (Frequency domain resource assignment field)
1C) Time domain resource assignment field
1D) Frequency hopping flag field (Frequency hopping flag field)
1E) MCS field (MCS field: Modulation and Coding Scheme field)
1F) First CSI request field (First CSI request field)

The DCI format specific field may be used at least to indicate whether the DCI format including the DCI format specific field corresponds to one or a plurality of DCI formats. The one or more DCI formats may be provided based on at least some or all of DCI format 1_0, DCI format 1_1, DCI format 0_0, and/or DCI format 0_1.

The frequency domain resource allocation field may be used at least to indicate frequency resource allocation for the PUSCH scheduled by the DCI format including the frequency domain resource allocation field. The frequency domain resource allocation field is also called an FDRA (Frequency Domain Resource Allocation) field.

The time domain resource allocation field may be used at least to indicate the allocation of the time resource for the PUSCH scheduled by the DCI format including the time domain resource allocation field.

The frequency hopping flag field may be used at least to indicate whether frequency hopping is applied to PUSCH scheduled by the DCI format including the frequency hopping flag field.

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

The first CSI request field is used at least to indicate the CSI report. The size of the first CSI request field may be a predetermined value. The size of the first CSI request field may be 0, 1, 2, or 3.

The DCI format 0_1 includes at least part or all of 2A to 2G.
2A) DCI format specific field 2B) Frequency domain resource allocation field 2C) Time domain resource allocation field 2D) Frequency hopping flag field 2E) MCS field 2F) Second CSI request field (Second CSI request field)
2G) BWP field (BWP field)

The BWP field may be used to indicate the uplink BWP to which the PUSCH scheduled by the DCI format 0_1 is mapped.

The second CSI request field is used at least to indicate the CSI report. The size of the second CSI request field may be given based at least on the upper layer parameter ReportTriggerSize.

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 3H.
3A) DCI format specific field (Identifier for DCI formats field)
3B) Frequency domain resource allocation field (Frequency domain resource assignment field)
3C) Time domain resource assignment field
3D) Frequency hopping flag field (Frequency hopping flag field)
3E) MCS field (MCS field: Modulation and Coding Scheme field)
3F) First CSI request field (First CSI request field)
3G) PDSCH-to-HARQ feedback timing indicator field (PDSCH-to-HARQ feedback back indicator field)
3H) PUCCH resource indicator field (PUCCH resource indicator field)

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.

Hereinafter, the PDSCH-to-HARQ feedback timing indicator field (PDSCH-to-HARQ_feedback timing indicator field) may be referred to as a HARQ instruction field.

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 DCI format 1_1 includes at least part or all of 4A to 4J.
4A) DCI format specific field (Identifier for DCI formats field)
4B) Frequency domain resource allocation field (Frequency domain resource assignment field)
4C) Time domain resource assignment field
4D) Frequency hopping flag field (Frequency hopping flag field)
4E) MCS field (MCS field: Modulation and Coding Scheme field)
4F) First CSI request field (First CSI request field)
4G) PDSCH-to-HARQ feedback timing indicator field (PDSCH-to-HARQ feedback back indicator field)
4H) PUCCH resource indicator field (PUCCH resource indicator field)
4J) BWP field (BWP field)

The BWP field may be used to indicate the downlink BWP to which the PDSCH scheduled by the DCI format 1_1 is mapped.

DCI format 2_0 may be configured to include at least one or more slot format indicators (SFI: Slot Format Indicator).

The downlink control information may include Unlicensed access common information. The unlicensed access common information is control information related to access, transmission/reception, etc. in the unlicensed frequency band. The unlicensed access common information may be information of a downlink subframe configuration (Subframe configuration for Unlicensed Access) (slot configuration: Slot configuration). The downlink subframe configuration (slot configuration) is the position of the OFDM symbol occupied in the subframe (slot) in which the PDCCH including the information of the downlink subframe configuration (slot configuration) is arranged, and/or the downlink. The position of the OFDM symbol occupied in the next subframe (slot) of the subframe (slot) in which the PDCCH including the information of the subframe configuration (slot configuration) is arranged. Downlink physical channels and downlink physical signals are transmitted and received in the occupied OFDM symbols. The unlicensed access common information may be information of an uplink subframe configuration (UL duration and offset) (slot configuration). In the uplink subframe configuration (slot configuration), the uplink subframe (uplink slot) starts with reference to the subframe (slot) in which the PDCCH including the information of the uplink subframe configuration (slot configuration) is arranged. The position of the subframe (slot) to be generated and the number of subframes (slots) of the uplink subframe (uplink slot) are shown. The terminal device 1 is not required to receive the downlink physical channel and the downlink physical signal in the subframe (slot) indicated by the information of the uplink subframe configuration (slot configuration).

For example, downlink control information including downlink grant or uplink grant is transmitted/received on the PDCCH including C-RNTI (Cell-Radio Network Temporary Identifier). For example, the unlicensed access common information is transmitted/received by PDCCH including CC-RNTI (Common Control-Radio Network Temporary Identifier).

In various aspects of this embodiment, the number of resource blocks indicates the number of resource blocks in the frequency domain, unless otherwise specified.

-The downlink grant is used at least for scheduling one PDSCH in one serving cell.

-The uplink grant is used at least for scheduling one PUSCH in one serving cell.

One physical channel may be mapped to one serving cell. One physical channel may be mapped to one BWP set in one carrier included in one serving cell.

In the terminal device 1, one or a plurality of control resource sets (CORESET: Control Resource Set) may be set. The terminal device 1 monitors the PDCCH in one or a plurality of control resource sets (monitor). Here, monitoring the PDCCH in one or more control resource sets may include monitoring one or more PDCCHs corresponding to each of the one or more control resource sets. The PDCCH may include one or more PDCCH candidates and/or a set of PDCCH candidates. Also, monitoring the PDCCH may include monitoring and detecting the PDCCH and/or the DCI format transmitted over the PDCCH.

The control resource set may indicate a time frequency domain to which one or more PDCCHs can be mapped. The control resource set may be an area in which the terminal device 1 monitors the PDCCH. The control resource set may be configured by continuous resources (Localized resources). The control resource set may be composed of non-contiguous resources (distributed resources).

-In the frequency domain, the unit of mapping of the control resource set may be a resource block. For example, in the frequency domain, the unit of control resource set mapping may be 6 resource blocks. In the time domain, the unit of control resource set mapping may be an OFDM symbol. For example, in the time domain, the unit of control resource set mapping may be one OFDM symbol.

Mapping of control resource set to resource block may be given based at least on higher layer parameters. The upper layer parameter may include a bitmap for a group of resource blocks (RBG: Resource Block Group). The group of resource blocks may be provided by 6 consecutive resource blocks.

The number of OFDM symbols that make up the control resource set may be given based at least on upper layer parameters.

A certain control resource set may be a common control resource set (Common control resource set). The common control resource set may be a control resource set commonly set for a plurality of terminal devices 1. The common control resource set may be provided based on at least some or all of the MIB, the first system information, the second system information, the common RRC signaling, and the cell ID. For example, the time resource and/or the frequency resource of the control resource set configured to monitor the PDCCH used for scheduling the first system information may be provided at least based on the MIB.

The control resource set set by MIB is also referred to as CORESET#0. CORESET#0 may be the control resource set of index #0.

A control resource set may be a dedicated control resource set (Dedicated control resource set). The dedicated control resource set may be a control resource set set to be exclusively used for the terminal device 1. The dedicated control resource set may be provided based at least on the dedicated RRC signaling and some or all of the values of the C-RNTI. A plurality of control resource sets may be configured in the terminal device 1, and an index (control resource set index) may be assigned to each control resource set. One or more control channel elements (CCE) may be configured in the control resource set, and an index (CCE index) may be assigned to each CCE.

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

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

The terminal device 1 may monitor at least one or a plurality of search areas in slots where DRX (Discontinuous reception) is not set. DRX may be provided based at least on higher layer parameters. The terminal device 1 may monitor at least one or a plurality of search area sets (Search space sets) in slots in which DRX is not set. A plurality of search area sets may be configured in the terminal device 1. An index (search area set index) may be assigned to each search area set.

The search area set may be configured to include at least one or a plurality of search areas. An index (search area index) may be added to each search area.

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

The search area may have two types: CSS (Common Search Space, common search area) and USS (UE-specific Search Space). The CSS may be a search area commonly set for a plurality of terminal devices 1. The USS may be a search area including a setting used exclusively for the individual terminal device 1. The CSS may be provided based on at least the synchronization signal, the MIB, the first system information, the second system information, the common RRC signaling, the dedicated RRC signaling, the cell ID, and the like. The USS may be provided based at least on the dedicated RRC signaling and/or the value of C-RNTI. The CSS may be a search area set as a common resource (control resource element) for the plurality of terminal devices 1. The USS may be a search area set in a resource (control resource element) for each individual terminal device 1.

The CSS is a type 0 PDCCH CSS for the SI-RNTI scrambled DCI format used for transmitting system information in the primary cell, and RA-RNTI, TC-RNTI scrambled DCI format used for initial access. Type 1 PDCCH CSS may be used. As the CSS, a PDCCH CSS of a type for a DCI format scrambled by CC-RNTI used for Unlicensed access may be used. The terminal device 1 can monitor PDCCH candidates in those search areas. The DCI format scrambled by a predetermined RNTI may be a DCI format to which a CRC (Cyclic Redundancy Check) scrambled by a predetermined RNTI is added.

Information related to PDCCH reception may include information related to an ID that indicates the destination of PDCCH. The ID indicating the destination of the PDCCH may be an ID used for scrambling the CRC bit added to the PDCCH. The ID that indicates the destination of the PDCCH is also called an RNTI (Radio Network Temporary Identifier). The information related to the reception of the PDCCH may include information related to the ID used for scrambling the CRC bits added to the PDCCH. The terminal device 1 can try to receive the PDCCH based at least on the information related to the ID included in the PBCH.

The RNTI is SI-RNTI (System Information-RNTI), P-RNTI (Paging-RNTI), C-RNTI (Common-RNTI), Temporary C-RNTI (TC-RNTI), RA-RNTI (Random-Random). , CC-RNTI (Common Control-RNTI) and INT-RNTI (Interruption-RNTI) may be included. SI-RNTI is used at least for scheduling of PDSCH transmitted by including system information. The P-RNTI is used at least for scheduling the PDSCH transmitted by including information such as paging information and/or system information change notification. The C-RNTI is used at least for scheduling user data for the terminal device 1 that is RRC-connected. The Temporary C-RNTI is used at least for scheduling the random access message 4. Temporary C-RNTI is used at least for scheduling PDSCH including data mapped to CCCH in a logical channel. RA-RNTI is used at least for scheduling of random access message 2. CC-RNTI is used at least for transmitting and receiving Unlicensed access control information. INT-RNTI is used at least to indicate Pre-emption in the downlink.

The PDCCH and/or DCI included in the CSS does not include a CIF (Carrier Indicator Field) indicating which serving cell (or which component carrier) the PDSCH or PUSCH is scheduled by the PDCCH/DCI. May be.

In addition, when carrier aggregation (CA: carrier aggregation) that aggregates a plurality of serving cells and/or a plurality of component carriers to perform communication (transmission and/or reception) for the terminal device 1 is set, The PDCCH and/or DCI included in the USS for a serving cell (predetermined component carrier) includes a CIF indicating which serving cell and/or which component carrier the PDSCH or PUSCH is scheduled by the PDCCH/DCI.

When performing communication with the terminal device 1 using one serving cell and/or one component carrier, the PDCCH and/or DCI included in the USS includes which serving cell and/or which PDCCH/DCI. Alternatively, the CIF indicating which component carrier PDSCH or PUSCH is scheduled may not be included.

-The common control resource set may include CSS. The common control resource set may include both CSS and USS. The dedicated control resource set may include USS. The dedicated control resource set may include CSS.

Physical resources in the search area are configured by the control channel configuration unit (CCE: Control Channel Element). The CCE is composed of a predetermined number of resource element groups (REG: Resource Element Group). For example, the CCE may be composed of 6 REGs. 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 Elements). The PRB is also simply referred to as an RB (Resource Block: resource block).

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

In FIG. 1, the following downlink physical signals are used in downlink wireless communication. The downlink physical signal is used by the physical layer, although it may not be used to transmit the information output from the upper layer.
・Synchronization signal (SS)
DL DLRS (DownLink DeModulation Reference Signal)
・CSI-RS (Channel State Information-Reference Signal)
DL PTRS (DownLink Phase 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.

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.

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 pattern of PTRS assumed by the terminal device may be given based at least on upper layer parameters and/or 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 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.

BCH (Broadcast CHannel), UL-SCH (Uplink-Shared CHannel), and DL-SCH (Downlink-Shared CHannel) are transport channels. A channel used in a medium access control (MAC: Medium Access Control) layer is called a transport channel. 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 (send/receive) signals of the upper layer in the upper layer (higher layer). For example, the base station device 3 and the terminal device 1 may perform RRC message (RRC message: Radio Resource control; RRC information: Radio Resource control) transmission/reception in the radio resource control (RRC: Radio Resource Control) layer. .. Further, the base station device 3 and the terminal device 1 may send and receive MAC CE (Control Element) in the MAC layer. Here, the RRC signaling and/or the MAC CE is also referred to as a higher layer signal (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. The upper layer parameter unique to the serving cell may be transmitted/received using common signaling for a plurality of terminal devices 1 in the serving cell or dedicated signaling for a certain terminal device 1. The UE-specific upper layer parameters may be transmitted/received 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/receiving MIB. CCCH (Common Control Channel) is an upper layer channel used for transmitting/receiving 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. DCCH (Dedicated Control Channel) is an upper layer channel used at least for transmitting/receiving dedicated control information (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. 4 is a schematic block diagram showing the configuration of the terminal device 1 according to one 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 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 performs processing of a MAC layer, a packet data integration protocol (PDCP: Packet Data Convergence Protocol) layer, a radio link control (RLC: Radio Link Control) layer, and an 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 setting information may include information related to processing or setting of a physical channel or a physical signal (that is, physical layer), MAC layer, PDCP layer, RLC layer, RRC layer. 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 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 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 RF unit 12 converts a signal received via the antenna unit 11 into a baseband signal by quadrature demodulation (down conversion: down covert) 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 a CP (Cyclic Prefix) from the converted digital signal, and performs a fast Fourier transform (FFT: Fast Fourier Transform) on the signal from which the CP is removed to obtain a signal in the frequency domain. Extract.

The baseband unit 13 performs an inverse fast Fourier transform (IFFT: Inverse Fast Fourier Transform) on the data to generate an OFDM symbol, adds CP to the generated OFDM symbol, and generates a baseband digital 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 the analog signal 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. 5 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 setting information may include information related to processing or setting of a physical channel or a physical signal (that is, physical layer), MAC layer, PDCP layer, RLC layer, RRC layer. The parameter may be an upper layer parameter.

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

The terminal device 1 may perform carrier sense (Carrier sense) before transmitting the physical signal. Further, the base station device 3 may perform carrier sense before transmitting the physical signal. The carrier sense may be to perform energy detection in a wireless channel (Radio channel). Whether or not the physical signal can be transmitted may be given based on the carrier sense performed prior to the transmission of the physical signal. For example, if the amount of energy detected by the carrier sense performed prior to the transmission of the physical signal is larger than a predetermined threshold value, the physical channel may not be transmitted, or the transmission may not be performed. May be determined. Further, when the amount of energy detected by the carrier sense performed prior to the transmission of the physical signal is smaller than a predetermined threshold value, the physical channel may be transmitted, or transmission is possible. It may be judged. Further, when the amount of energy detected by the carrier sense performed prior to the transmission of the physical signal is equal to the predetermined threshold value, the transmission of the physical channel may or may not be performed. .. That is, when the amount of energy detected by the carrier sense performed prior to the transmission of the physical signal is equal to the predetermined threshold value, it may be determined that the transmission is impossible or the transmission is possible. Good.

∙ The procedure for giving permission/prohibition of physical channel based on carrier sense is also called LBT (Listen Before Talk). The situation where it is determined that the physical signal cannot be transmitted as a result of the LBT is also referred to as a busy state or busy. For example, the busy state may be a state in which the amount of energy detected by carrier sensing is larger than a predetermined threshold value. A situation in which it is determined that the physical signal can be transmitted as a result of the LBT is also called an idle state or idle. For example, the idle state may be a state in which the amount of energy detected by carrier sensing is smaller than a predetermined threshold value.

The value of the section in which channels are continuously occupied (channel occupancy section) (Channel Occupancy Time: COT) may be determined in advance depending on the country, or may be determined in advance for each frequency band. The base station device 3 may notify the terminal device 1 of the occupied channel section. The terminal device 1 recognizes the length of the channel occupancy section, and can recognize the timing when the channel occupancy section ends. For example, the maximum value of COT may be any of 2 ms, 3 ms, 6 ms, 8 ms, and 10 ms.

The terminal device 1 may multiplex the uplink control information (UCI) on the PUCCH and transmit it. The terminal device 1 may multiplex UCI on PUSCH and transmit. The UCI, downlink channel state information (Channel State Information: CSI), scheduling request indicating a request of the PUSCH resource (Scheduling Request: SR), downlink data (Transport block, Medium Access Control Protocol Data Unit: MAC PDU, Downlink -At least one of HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) for Shared Channel: DL-SCH, Physical Downlink Shared Channel (PDSCH) may be included.

HARQ-ACK may also be referred to as ACK/NACK, HARQ feedback, HARQ-ACK feedback, HARQ response, HARQ-ACK response, HARQ information, HARQ-ACK information, HARQ control information, and HARQ-ACK control information. ..

If the downlink data is successfully decoded, an ACK for the downlink data is generated. If the downlink data is not successfully decoded, a NACK for the downlink data is generated. HARQ-ACK may include at least HARQ-ACK bits corresponding to at least one transport block. The HARQ-ACK bit may indicate ACK (ACKnowledgement) or NACK (Negative-ACKnowledgement) corresponding to one or a plurality of transport blocks. HARQ-ACK may include at least a HARQ-ACK codebook (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 control for one transport block may be called a HARQ process. One HARQ process identifier may be provided for each HARQ process.

The terminal device 1 transmits the HARQ-ACK information to the HARQ-ACK codebook (HARQ-ACK codebook) in the slot indicated by the DCI format 1_0 corresponding to PDSCH reception or the value of the HARQ indication field included in the DCI format 1_1. ) May be used to report to the base station apparatus 3.

For DCI format 1_0, the value of the HARQ indication field may be mapped to a set of slot numbers (1,2,3,4,5,6,7,8). For DCI format 1_1, the value of the HARQ indication field may be mapped to the set of slot numbers given by the upper layer parameter dl-DataToUL-ACK. The number of slots indicated at least based on the value of the HARQ indication field may also be referred to as HARQ-ACK timing or K1. For example, HARQ-ACK indicating the decoding state of PDSCH (downlink data) transmitted in slot n may be reported (transmitted) in slot n+K1.

Dl-DataToUL-ACK shows a list of HARQ-ACK timings for PDSCH. Timing is the number of slots between the slot in which PDSCH is received (or the slot containing the last OFDM symbol to which PDSCH is mapped) and the slot in which HARQ-ACK for the received PDSCH is transmitted. is there. For example, dl-DataToUL-ACK is a list of 1, or 2, or 3, or 4, or 5, or 6, or 7, or 8 timings. If the dl-DataToUL-ACK is a list of one timing, the HARQ indication field is 0 bit. If the dl-DataToUL-ACK is a list of two timings, the HARQ indication field is 1 bit. For a list of 3 or 4 timings of dl-DataToUL-ACK, the HARQ indication field is 2 bits. For a list of 5 or 6, or 7, or 8 timings of dl-DataToUL-ACK, the HARQ indication field is 3 bits. For example, dl-DataToUL-ACK is composed of a list of timings with any value in the range of 0 to 31. For example, dl-DataToUL-ACK is composed of a list of timings with any value in the range of 0 to 63.

The size of dl-DataToUL-ACK is defined as the number of elements included in dl-DataToUL-ACK. The size of dl-DataToUL-ACK may be referred to as L _para . The index of dl-DataToUL-ACK indicates the order (number) of the elements of dl-DataToUL-ACK. For example, if the size of dl-DataToUL-ACK is 8 (L _para =8), the index of dl-DataToUL-ACK is either 1, 2, 3, 4, 5, 6, 7, or 8. It is a value. The index of dl-DataToUL-ACK may be given, indicated by, or indicated by the value indicated by the HARQ indication field.

The terminal device 1 sets the size of HARQ-ACK codebook according to the size of dl-DataToUL-ACK. For example, if dl-DataToUL-ACK consists of 8 elements, the size of HARQ-ACK codebook is 8. For example, if dl-DataToUL-ACK consists of two elements, the size of HARQ-ACK codebook is 2. The HARQ-ACK information of each HARQ-ACK codebook is HARQ-ACK information for PDSCH reception at each slot timing of dl-DataToUL-ACK.

An example of setting the HARQ instruction field will be described. For example, dl-DataToUL-ACK is composed of a list of 8 timings 0, 7, 15, 23, 31, 39, 47, 55, and the HARQ indication field is composed of 3 bits. The HARQ indication field of “000” corresponds to the first 0 in the dl-DataToUL-ACK list as the corresponding timing. That is, the HARQ indication field of "000" corresponds to the value 0 indicated by the index 1 of dl-DataToUL-ACK. The HARQ instruction field “001” corresponds to the second 7 in the list of dl-DataToUL-ACK as the corresponding timing. The HARQ instruction field “010” corresponds to the third 15 in the dl-DataToUL-ACK list as the corresponding timing. The HARQ instruction field “011” corresponds to the fourth 23 in the list of dl-DataToUL-ACK as the corresponding timing. The HARQ indication field of “100” corresponds to the fifth 31 in the list of dl-DataToUL-ACK as the corresponding timing. The HARQ instruction field “101” corresponds to the sixth 39 in the list of dl-DataToUL-ACK as the corresponding timing. The HARQ indication field of “110” corresponds to the seventh 47 in the list of dl-DataToUL-ACK as the corresponding timing. The HARQ indication field of "111" corresponds to the 8th 55 of the dl-DataToUL-ACK list as the corresponding timing. When the received HARQ indication field indicates “000”, the terminal device 1 transmits the corresponding HARQ-ACK in the 0th slot from the received PDSCH slot. When the received HARQ indication field indicates “001”, the terminal device 1 transmits the corresponding HARQ-ACK in the seventh slot from the received PDSCH slot. When the received HARQ indication field indicates “010”, the terminal device 1 transmits the corresponding HARQ-ACK in the 15th slot from the received PDSCH slot. When the received HARQ instruction field indicates “011”, the terminal device 1 transmits the corresponding HARQ-ACK in the 23rd slot from the received PDSCH slot. When the received HARQ instruction field indicates “100”, the terminal device 1 transmits the corresponding HARQ-ACK in the 31st slot from the received PDSCH slot. When the received HARQ indication field indicates “101”, the terminal device 1 transmits the corresponding HARQ-ACK in the 39th slot from the received PDSCH slot. When the received HARQ instruction field indicates “110”, the terminal device 1 transmits the corresponding HARQ-ACK in the 47th slot from the received PDSCH slot. When the received HARQ indication field indicates “111”, the terminal device 1 transmits the corresponding HARQ-ACK in the 55th slot from the received PDSCH slot.

When the upper layer parameter pdsch-AggregationFactor is given to the terminal device 1, N _PDSCH ^repeat may be the value of pdsch-AggregationFactor. When the upper layer parameter pdsch-AggregationFactor is not given to the terminal device 1, N _PDSCH ^repeat may be 1. The terminal device 1 may report HARQ-ACK information for PDSCH reception from slot n−N _PDSCH ^repeat +1 to slot n using PUCCH transmission and/or PUSCH transmission in slot n+k. Here, k may be the number of slots indicated by the HARQ indication field included in the DCI format corresponding to the PDSCH reception. If the HARQ indication field is not included in the DCI format, k may be given by the upper layer parameter dl-DataToUL-ACK.

When the terminal device 1 is configured to monitor the PDCCH including the DCI format 1_0 and not to monitor the PDCCH including the DCI format 1_1, the HARQ-ACK timing value K1 is (1, 2, 3, 4, 5, 6, 7, 8) may be part or all. When the terminal device 1 is configured to monitor the PDCCH including the DCI format 1_1, the HARQ-ACK timing value K1 may be given by the upper layer parameter dl-DataToUL-ACK.

The terminal device 1 determines a set of multiple opportunities for receiving one or more candidate PDSCHs for transmitting corresponding HARQ-ACK information on the PUCCH of a certain slot. The terminal device 1 determines that the plurality of slots at the slot timing K1 included in the dl-DataToUL-ACK are the plurality of opportunities for receiving the candidate PDSCH. K1 may be a set of k. For example, when dl-DataToUL-ACK is (1, 2, 3, 4, 5, 5, 6, 7, 8), the PUCCH in slot n receives PDSCH in slot n−1 and PDSCH in slot n−2. Reception, PDSCH reception in slot n-3, PDSCH reception in slot n-4, PDSCH reception in slot n-5, PDSCH reception in slot n-6, PDSCH reception in slot n-7, n-8 HARQ-ACK information for PDSCH reception of the slot is transmitted. When the terminal device 1 actually receives the PDSCH in the slot corresponding to the reception of the candidate PDSCH, the terminal device 1 sets ACK or NACK as HARQ-ACK information based on the transport block included in the PDSCH, and corresponds to the reception of the candidate PDSCH. When PDSCH is not received in the slot to be set, NACK is set as HARQ-ACK information.

The HARQ instruction field included in the DCI format received on the PDCCH of the n-1 slot indicates 1. The HARQ instruction field included in the DCI format received on the PDCCH of the slot of n-2 indicates 2. The HARQ instruction field included in the DCI format received on the PDCCH of the slot of n-3 indicates 3. The HARQ indication field included in the DCI format received on the PDCCH of the slot of n-4 indicates 4. The HARQ instruction field included in the DCI format received on the PDCCH of the slot of n-5 indicates 5. The HARQ indication field included in the DCI format received on the PDCCH of the n-6 slot indicates 6. The HARQ indication field included in the DCI format received on the PDCCH of the n-7 slot indicates 7. The HARQ indication field included in the DCI format received on the PDCCH of the n-8 slot indicates 8.

The terminal device 1 receives the slot that receives the PDCCH and the slot that transmits the HARQ-ACK information based on the value of the HARQ indication field included in the received DCI format, and the plurality of candidate PDSCH receptions that correspond to the HARQ-ACK information. Determine the set of slots. For example, if dl-DataToUL-ACK is (1, 2, 3, 4, 5, 6, 7, 8), the terminal device 1 receives the PDCCH in the slot m, and the HARQ instruction field included in the DCI format is 4 Is shown. The terminal device 1 determines to transmit HARQ-ACK information in slot (m+4). In the terminal device 1, other HARQ-ACK information transmitted in the slot (m+4) is the HARQ-ACK information for PDSCH reception in the slot (m+(1-4)) and the other HARQ-ACK information in the slot (m+(2-4)). HARQ-ACK information for PDSCH reception, HARQ-ACK information for PDSCH reception in slot (m+(3-4)), HARQ-ACK information for PDSCH reception in slot (m+(5-4)), and slot (m+ HARQ-ACK information for PDSCH reception of (6-4), HARQ-ACK information for PDSCH reception of slot (m+(7-4)), and HARQ-ACK for PDSCH reception of slot (m+(8-4)). It is determined to be ACK information.

The dl-DataToUL-ACK includes not only a value indicating the number of slots (second value) as the timing of HARQ-ACK but also a value (information) indicating holding HARQ-ACK (first value). Can be done. When the terminal device 1 receives the HARQ indication field indicating the first value on the PDCCH, the terminal device 1 holds HARQ-ACK (HARQ-ACK information) for the PDSCH scheduled on the PDCCH, and HARQ-ACK (HARQ-ACK information). ) Wait for transmission.

The terminal device 1 may set the size of the HARQ-ACK codebook according to the number of second values of dl-DataToUL-ACK. For example, if there are 8 elements of the second value of dl-DataToUL-ACK, the size of HARQ-ACK codebook is 8. For example, if there are two elements of the second value of dl-DataToUL-ACK, the size of HARQ-ACK codebook is 2. The HARQ-ACK information of each HARQ-ACK codebook is HARQ-ACK information for PDSCH reception at each slot timing of dl-DataToUL-ACK.

When the terminal device 1 in the standby state for transmitting the HARQ-ACK information receives the HARQ instruction field indicating the second value, the HARQ-ACK information waiting for the HARQ-ACK information corresponding to the reception of the candidate PDSCH in the specific slot is received. The information is set (overwritten) and HARQ-ACK information is transmitted. For example, the waiting HARQ-ACK information is set (overwritten) in the HARQ-ACK information corresponding to the reception of the candidate PDSCH in the first (first) timing slot of dl-DataToUL-ACK. For example, the HARQ-ACK information on standby is set (overwritten) in the HARQ-ACK information corresponding to the reception of the candidate PDSCH in the last timing slot of dl-DataToUL-ACK. For example, when there are a plurality of HARQ-ACK information items in the waiting state, the HARQ-ACK information items waiting for the first (first) timing slot of the dl-DataToUL-ACK are sequentially received from the HARQ-ACK information items corresponding to the reception of the candidate PDSCH. Is set (overwritten). For example, when there are multiple pieces of HARQ-ACK information in a standby state, the waiting HARQ-ACK information is set in order from the HARQ-ACK information corresponding to the candidate PDSCH reception of the last timing slot of dl-DataToUL-ACK ( Will be overwritten).

FIG. 6 is a diagram illustrating an example of transmitting HARQ-ACK information according to the embodiment of the present invention. In FIG. 6, X _HARQ indicates a HARQ indication field. For example, a list of (10, 9, 8, 7, 7, 6, 5, 4, X) is set (configured) in the terminal device 1 in the dl-DataToUL-ACK. Here, X is a first value. In a certain slot, the terminal device 1 receives a HARQ-ACK indication field indicating X on a certain PDCCH, holds HARQ-ACK information for the PDSCH reception 601 scheduled on that PDCCH, and waits for transmission of HARQ-ACK information. To do. In the subsequent slot N, the terminal device 1 receives the HARQ instruction field indicating 9 on a certain PDCCH. The terminal device 1 uses the PUCCH 609 of the slot (N+9) for HARQ-ACK information in the standby state, HARQ-ACK information for the PDSCH reception 603 of the slot N, and HARQ for the PDSCH reception 604 of the slot (N+(9-8)). -ACK information, HARQ-ACK information for PDSCH reception 605 in slot (N+(9-7)), HARQ-ACK information for PDSCH reception 606 in slot (N+(9-6)), and slot (N+(9 -5)) HARQ-ACK information for PDSCH reception 607 and HARQ-ACK information for PDSCH reception 608 of slot (N+(9-4)) are transmitted. The terminal device 1 transmits those HARQ-ACK information in the same HARQ-ACK codebook. The terminal device 1 puts the HARQ-ACK information in the standby state in the HARQ-ACK information (HARQ-ACK information for the first slot of dl-DataToUL-ACK) for the PDSCH reception 602 of the slot (N+(9-10)). Set (overwrite).

FIG. 7 is a diagram illustrating an example of transmitting HARQ-ACK information according to the embodiment of the present invention. In FIG. 7, X _HARQ indicates a HARQ indication field. For example, the list of (X, 10, 9, 8, 7, 6, 5, 4) is set (configured) in the terminal device 1 in the dl-DataToUL-ACK. Here, X is a first value. In a certain slot, the terminal device 1 receives a HARQ-ACK indication field indicating X on a certain PDCCH, holds HARQ-ACK information for the PDSCH reception 701 scheduled on that PDCCH, and waits for transmission of HARQ-ACK information. To do. In the subsequent PUCCH 709 of slot N, the terminal device 1 receives the HARQ instruction field indicating 9 on a certain PDCCH. In the terminal device 1, HARQ-ACK information for the PDSCH reception 702 of the slot (N+(9-10)), HARQ-ACK information for the PDSCH reception 703 of the slot N, and the slot (N+(9- 8)) HARQ-ACK information for PDSCH reception 704, HARQ-ACK information for PDSCH reception 705 of slot (N+(9-7)), and HARQ-ACK for PDSCH reception 706 of slot (N+(9-6)). The ACK information, the HARQ-ACK information for the PDSCH reception 707 in the slot (N+(9-5)), and the HARQ-ACK information in the standby state are transmitted. The terminal device 1 transmits those HARQ-ACK information in the same HARQ-ACK codebook. The terminal device 1 puts the HARQ-ACK information in the standby state in the HARQ-ACK information (HARQ-ACK information for the last slot of dl-DataToUL-ACK) for the PDSCH reception 708 of the slot (N+(9-4)). Set (overwrite).

FIG. 8 is a diagram illustrating an example of transmitting HARQ-ACK information according to the embodiment of the present invention. In FIG. 8, X _HARQ indicates a HARQ indication field. A different example will be described. For example, a list of (10, 9, 8, 7, 7, 6, 5, 4, X) is set (configured) in the terminal device 1 in the dl-DataToUL-ACK. Here, X is a first value. In a certain slot, the terminal device 1 receives a HARQ-ACK indication field indicating X on a certain PDCCH, holds HARQ-ACK information for the PDSCH scheduled on that PDCCH, and waits for transmission of HARQ-ACK information. In a different slot, the terminal device 1 receives the HARQ-ACK indication field indicating X on a certain PDCCH, holds the HARQ-ACK information for PDSCH receptions 801 and 802 scheduled on that PDCCH, and stores the HARQ-ACK information. Wait for transmission. The terminal device 1 holds the HARQ-ACK information for which two transmissions are waiting. In the subsequent slot N, the terminal device 1 receives the HARQ instruction field indicating 8 on a certain PDCCH. The terminal device 1 uses the PUCCH 810 of the slot (N+8) to receive two pieces of HARQ-ACK information in a standby state, HARQ-ACK information for the PDSCH reception 805 of the slot N, and PDSCH reception of the slot (N+(8-7)). HARQ-ACK information for 806, HARQ-ACK information for PDSCH reception 807 of slot (N+(8-6)), HARQ-ACK information for PDSCH reception 808 of slot (N+(8-5)), and slot ( HARQ-ACK information for N+(8-4) PDSCH reception 809 is transmitted. The terminal device 1 transmits those HARQ-ACK information in the same HARQ-ACK codebook. The terminal device 1 receives the HARQ-ACK information for the PDSCH reception 803 of the slot (N+(8-10)) and the HARQ-ACK information (dl-DataToUL-ACK) for the PDSCH reception 804 of the slot (N+(8-9)) first. The HARQ-ACK information in the standby state is set (overwritten) in the portion of the HARQ-ACK information for the two slots from the slot No.

The terminal device 1 receives the PDSCH and HARQ-ACK timing list (dl-DataToUL-ACK), and waits for the HARQ-ACK (Pending HARQ-ACK) in the slot corresponding to the specific timing in the list. The HARQ-ACK corresponding to the reception of the candidate PDSCH is set, and the HARQ-ACK codebook corresponding to the list is transmitted. The terminal device 1 receives the HARQ indication field (PDSCH-to-HARQ_feedback timing indicator) having a value indicating that the HARQ-ACK is held at a certain COT, sets the HARQ-ACK to a standby state, and then receives the next COT. Then, the HARQ-ACK that is waiting is transmitted.

The base station device 3 transmits a PDSCH and HARQ-ACK timing list (dl-DataToUL-ACK), and the HARQ-ACK (Pending HARQ-ACK) waiting for transmission corresponds to the specific timing in the list. The HARQ-ACK codebook corresponding to the list set in the HARQ-ACK corresponding to the reception of the candidate PDSCH of the corresponding slot is received, and the HARQ-ACK is determined. The base station device 3 transmits a HARQ indication field (PDSCH-to-HARQ_feedbacktiming indicator) having a value indicating that the HARQ-ACK is held at a certain COT, and puts the HARQ-ACK into a standby state, then The HARQ-ACK waiting in the COT is received.

The terminal device 1 may set the size of the HARQ-ACK codebook according to the number of elements having the first value and the second value of the dl-DataToUL-ACK. For example, a list of (10, 9, 8, 7, 7, 6, 5, 4, X) is set (configured) in the terminal device 1 in the dl-DataToUL-ACK. Here, X is a first value. The terminal device 1 generates a HARQ-ACK codebook including eight pieces of HARQ-ACK information. In a certain slot, the terminal device 1 receives the HARQ-ACK indication field indicating the first value X on a certain PDCCH, holds the HARQ-ACK information for the PDSCH scheduled on that PDCCH, and transmits the HARQ-ACK information. To wait. In the subsequent slots, the terminal device 1 receives the HARQ-ACK instruction field indicating the second value on a certain PDCCH, generates the HARQ-ACK codebook, and generates the slot at the timing indicated by the HARQ-ACK instruction field. The HARQ-ACK codebook is sent. If the slot for transmitting the HARQ-ACK codebook is N, the first HARQ-ACK information of the HARQ-ACK codebook is the PDSCH reception of the N-10 slot (the slot corresponding to the first timing of dl-DataToUL-ACK). The second HARQ-ACK information of the HARQ-ACK codebook is the HARQ-ACK information for PDSCH reception of the N-9 slot (the slot corresponding to the second timing of the dl-DataToUL-ACK). And the third HARQ-ACK information of HARQ-ACK codebook is HARQ-ACK information for PDSCH reception of the N-8 slot (slot corresponding to the third timing of dl-DataToUL-ACK), and HARQ- The fourth HARQ-ACK information of ACK codebook is the HARQ-ACK information for PDSCH reception of the N-7 slot (the slot corresponding to the fourth timing of dl-DataToUL-ACK), and the fifth HARQ-ACK codebook. HARQ-ACK information is HARQ-ACK information for PDSCH reception in the N-6 slot (slot corresponding to the fifth timing of dl-DataToUL-ACK), and the sixth HARQ-ACK information of the HARQ-ACK codebook. Is HARQ-ACK information for PDSCH reception of N-5 slot (slot corresponding to the sixth timing of dl-DataToUL-ACK), and the seventh HARQ-ACK information of HARQ-ACK codebook is N-4. HARQ-ACK information for PDSCH reception of the slot (slot corresponding to the 7th timing of dl-DataToUL-ACK), and the 8th HARQ-ACK information of HARQ-ACK codebook is the waiting HARQ-ACK information. .. The terminal device 1 waits at the position (order) of the HARQ-ACK information in the HARQ-ACK codebook, which corresponds to the position (order) in which the first value in the dl-DataToUL-ACK is indicated. Set the information.

The terminal device 1 receives the PDSCH and HARQ-ACK timing list (dl-DataToUL-ACK) including the first value indicating that the HARQ-ACK information is held, and the waiting HARQ-ACK( HARQ-ACK codebook including Pending HARQ-ACK) is transmitted, and the waiting HARQ is in the same position (order) as the position (order) of the first value in the list in the HARQ-ACK codebook. -Set ACK. The terminal device 1 receives the HARQ instruction field (PDSCH-to-HARQ_feedback timing indicator) of the first value at a certain COT, sets the transmission of the HARQ-ACK in a standby state, and waits at the next COT. Send HARQ-ACK.

The base station apparatus 3 transmits a PDSCH and HARQ-ACK timing list (dl-DataToUL-ACK) including a first value indicating that the HARQ-ACK information is held, and the waiting HARQ-ACK is transmitted. A HARQ-ACK codebook including (Pending HARQ-ACK) is received, and from the HARQ-ACK at the same position (order) as the position (order) of the first value in the list in the HARQ-ACK codebook. The HARQ-ACK in the waiting state is determined. The base station device 3 transmits the HARQ instruction field (PDSCH-to-HARQ_feedback timing indicator) of the first value at a certain COT, puts the HARQ-ACK in a standby state, and waits at the next COT. The HARQ-ACK is received.

Concentrating the transmission of HARQ-ACK information in the last slot of COT improves the utilization efficiency of the system. A time gap is required to switch between the downlink and the uplink, and if a large number of time gaps are provided, the utilization efficiency of the system deteriorates. Therefore, it is preferable that the base station device 3 switches only the last slot of the COT to the uplink and causes the terminal device 1 to transmit the HARQ-ACK information. On the other hand, it takes time for the terminal device 1 to receive the PDSCH and transmit the corresponding HARQ-ACK information. The terminal device 1 that does not support the high processing speed cannot transmit the HARQ-ACK information in the slot next to the slot in which the PDSCH is received. Such a terminal device 1 needs to transmit HARQ-ACK information for the PDSCH received in the last downlink slot of a certain COT in the subsequent COT. The present invention can solve such a problem by suppressing the amount of additional control information exchanged between the terminal device 1 and the base station device 3.

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, a first aspect of the present invention is a terminal device including a processor and a memory storing a computer program code, wherein when the computer program code is executed by the processor, PDSCH and HARQ-ACK are generated. Receiving the list of timings of the above, setting the waiting HARQ-ACK to the HARQ-ACK corresponding to the candidate PDSCH reception of the slot corresponding to the specific timing of the list, and the HARQ-ACK corresponding to the list. Perform operations including sending ACK codebook.

(2) Furthermore, receiving a HARQ indication field having a value indicating holding a HARQ-ACK at a certain COT to put the HARQ-ACK in a standby state, and the HARQ waiting at the next COT. Performing an action including sending an ACK.

(3) A second aspect of the present invention is a base station apparatus including a processor and a memory storing a computer program code, wherein when the computer program code is executed by the processor, PDSCH and HARQ- Corresponding to the list, transmitting a list of timings with ACK, and HARQ-ACK waiting for transmission is set to HARQ-ACK corresponding to reception of candidate PDSCH of slot corresponding to a specific timing of the list Perform an operation including receiving a HARQ-ACK codebook that does and determining the HARQ-ACK.

(4) Furthermore, by transmitting a HARQ indication field having a value indicating holding a HARQ-ACK at a certain COT, the transmission of the HARQ-ACK is put into a standby state, and the HARQ waiting at the next COT is transmitted. Performing an operation including receiving an ACK.

(5) A third aspect of the present invention is a communication method used in a terminal device, comprising the step of receiving a list of timings of PDSCH and HARQ-ACK, and specifying the waiting HARQ-ACK in the list. The step of setting HARQ-ACK corresponding to the reception of the candidate PDSCH of the slot corresponding to the timing of, and the step of transmitting the HARQ-ACK codebook corresponding to the list.

(6) Further, receiving a HARQ indication field of a value indicating holding a HARQ-ACK at a certain COT and putting the HARQ-ACK in a standby state, and the HARQ waiting at the next COT. -Transmitting an ACK.

(7) A fourth aspect of the present invention is a communication method used in a base station apparatus, comprising: transmitting a list of timings of PDSCH and HARQ-ACK; and HARQ-ACK waiting for transmission. A step of receiving a HARQ-ACK codebook corresponding to the list, which is set to a HARQ-ACK corresponding to reception of a candidate PDSCH of a slot corresponding to a specific timing of the list, and a step of determining the HARQ-ACK. Including.

(8) Further, transmitting a HARQ indication field having a value indicating holding a HARQ-ACK at a certain COT to put the HARQ-ACK in a standby state, and the HARQ waiting at the next COT. Receiving an ACK.

(9) A fifth aspect of the present invention is a terminal device including a processor and a memory storing a computer program code, wherein HARQ-ACK information is transmitted when the computer program code is executed by the processor. Receiving a list of timings of PDSCH and HARQ-ACK including a first value indicating holding, and a position (order) of the first value in the list in HARQ-ACK codebook. An operation including setting a waiting HARQ-ACK and transmitting the HARQ-ACK codebook is executed at the same position (order).

(10) A sixth aspect of the present invention is a base station apparatus including a processor and a memory storing a computer program code, wherein the HARQ-ACK information is obtained when the computer program code is executed by the processor. Transmitting a list of timings of PDSCH and HARQ-ACK including a first value indicating that the HARQ-ACK codebook including the waiting HARQ-ACK is received, and the HARQ-ACK is received. In the ACK codebook, determining the waiting HARQ-ACK from the HARQ-ACK at the same position (order) as the position (order) of the first value in the list. ..

(11) A seventh aspect of the present invention is a communication method used in a terminal device, which is a list of timings of PDSCH and HARQ-ACK including a first value indicating holding HARQ-ACK information. And a step of setting a waiting HARQ-ACK at the same position (order) as the position (order) of the first value in the list in the HARQ-ACK codebook, and the HARQ-ACK And a step of transmitting an ACK codebook.

(12) An eighth aspect of the present invention is a communication method used for a base station apparatus, comprising the timing of PDSCH and HARQ-ACK including a first value indicating holding HARQ-ACK information. A step of transmitting a list, a step of receiving a HARQ-ACK codebook including a waiting HARQ-ACK, and a position in the HARQ-ACK codebook that is the same as the position (order) of the first value in the list Determining the waiting HARQ-ACK from the (ordered) HARQ-ACK.

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, which holds a program for a certain period of time, may be included. Further, the program may be for realizing a part of the above-described functions, and may be a program for realizing the above-mentioned functions in combination with a program already recorded in the computer system.

The terminal device 1 may include at least one processor and at least one memory including a computer program instruction (computer program). The memory and the computer program instructions (computer programs) may be configured to cause the terminal device 1 to perform the operations and processes described in the above embodiments by using a processor. The base station device 3 may include at least one processor and at least one memory including a computer program instruction (computer program). The memory and the computer program instruction (computer program) may be configured to cause the base station device 3 to perform the operations and processes described in the above embodiments using a processor.

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 and made 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 a non-movable 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 (12)

1. A terminal device comprising a processor and a memory storing computer program code, wherein when the computer program code is executed by the processor, receiving a list of PDSCH and HARQ-ACK timings and waiting. The operation including setting the HARQ-ACK in the HARQ-ACK in the HARQ-ACK corresponding to the reception of the candidate PDSCH in the slot corresponding to the specific timing of the list, and transmitting the HARQ-ACK codebook corresponding to the list. A terminal device that executes.
2. A HARQ indication field having a value indicating holding a HARQ-ACK is received at a certain COT to put the HARQ-ACK into a standby state, and the waiting HARQ-ACK is transmitted at the next COT. The terminal device according to claim 1, further comprising:
3. A base station apparatus comprising a processor and a memory storing a computer program code, wherein when the computer program code is executed by the processor, a list of timings of PDSCH and HARQ-ACK is transmitted. Receiving the HARQ-ACK codebook corresponding to the list, the HARQ-ACK waiting for transmission is set to the HARQ-ACK corresponding to the candidate PDSCH reception of the slot corresponding to the specific timing of the list; A base station apparatus that performs operations including determining HARQ-ACK.
4. A HARQ indication field having a value indicating holding a HARQ-ACK is transmitted at a certain COT to put the transmission of the HARQ-ACK in a standby state, and the HARQ-ACK waiting at the next COT is received. The base station apparatus according to claim 3, further comprising:
5. A communication method used in a terminal device, comprising: receiving a list of timings of PDSCH and HARQ-ACK; and receiving a waiting HARQ-ACK for candidate PDSCH of a slot corresponding to a specific timing of the list. A communication method including the step of setting the HARQ-ACK to be performed and the step of transmitting the HARQ-ACK codebook corresponding to the list.
6. Receiving a HARQ indication field having a value indicating holding a HARQ-ACK at a certain COT and putting the HARQ-ACK in a standby state, and transmitting the waiting HARQ-ACK at the next COT. The communication method according to claim 5, further comprising:
7. A communication method used for a base station apparatus, comprising a step of transmitting a list of timings of PDSCH and HARQ-ACK, and a candidate PDSCH of a slot in which HARQ-ACK waiting for transmission corresponds to a specific timing of the list. A communication method comprising: receiving a HARQ-ACK codebook corresponding to the list, which is set in HARQ-ACK corresponding to reception; and determining the HARQ-ACK.
8. Transmitting a HARQ indication field having a value indicating holding a HARQ-ACK at a certain COT to put the HARQ-ACK in a standby state, and receiving the waiting HARQ-ACK at the next COT The communication method according to claim 7, further comprising:
9. A terminal device comprising a processor and a memory storing computer program code, the terminal device comprising a first value indicating retaining HARQ-ACK information when the computer program code is executed by the processor. Receiving a list of timings of PDSCH and HARQ-ACK, and waiting HARQ- in the same position (order) as the position (order) of the first value in the list in HARQ-ACK codebook. A terminal device that performs an operation including setting ACK and transmitting the HARQ-ACK codebook.
10. A base station apparatus comprising a processor and a memory storing computer program code, the base station apparatus including a first value indicating holding HARQ-ACK information when the computer program code is executed by the processor. , Transmitting a list of timings of PDSCH and HARQ-ACK, receiving a HARQ-ACK codebook including a waiting HARQ-ACK, and in the HARQ-ACK codebook, the first in the list. Determining the waiting HARQ-ACK from the HARQ-ACK at the same position (order) as the position (order) of the value of 1.
11. A communication method used for a terminal device, comprising: receiving a list of timings of PDSCH and HARQ-ACK including a first value indicating that HARQ-ACK information is held; and within the HARQ-ACK codebook. , A method of setting a waiting HARQ-ACK at the same position (order) as the position (order) of the first value in the list, and transmitting the HARQ-ACK codebook ..
12. A communication method used in a base station apparatus, comprising: transmitting a list of timings of PDSCH and HARQ-ACK including a first value indicating holding HARQ-ACK information; and waiting HARQ- Receiving HARQ-ACK codebook including ACK, and waiting from the HARQ-ACK at the same position (order) as the position (order) of the first value in the list in the HARQ-ACK codebook Determining the HARQ-ACK of the communication method.

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