WO2021166948A1 - Terminal device, base station device, and communication method - Google Patents

Abstract

The present invention sets a cyclical resource in an uplink cell managed by a first base station device and transmits, with the set cyclical resource, a HARQ-ACK codebook that includes a HARQ-ACK for the PDSCH of a downlink cell managed by a second base station device.

Description

Terminal equipment, base station equipment and communication methods

The present invention relates to terminal equipment, base station equipment and communication methods.
The present application claims priority with respect to Japanese Patent Application No. 2020-25106 filed in Japan on February 18, 2020, the contents of which are incorporated herein by reference.

A third-generation partnership project (3GPP: 3rdPerge It is being examined in Project). In LTE, the base station device is also called an eNodeB (evolved NodeB), and the 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 apparatus are arranged in a cell shape. A single base station device may manage multiple serving cells.

In 3GPP, next-generation standards (NR: New Radio) are being studied and standardized as 5G communication methods. In a single technical framework, NR is assumed to satisfy three scenarios: eMBB (enhanced Mobile Broadband), mMTC (massive Machine Type Communication), and URLLC (Ultra Reliable and Low Latency Communication). There is.

In addition, a method using a plurality of frequency spectra is being studied (Non-Patent Document 2). It is being studied that a plurality of base station devices communicate with terminal devices using different frequency spectra. One base station device uses the downlink frequency spectrum and the uplink frequency spectrum, and the other base station device uses the downlink frequency spectrum to communicate with the terminal device 1.

Data error detection result, data reception result (received data was not wrong, received) from the data receiving side to the data transmitting side so that the data retransmission can be controlled appropriately. It is necessary to give appropriate feedback such as (the data was incorrect, the data was not received), etc. The data transmitting side retransmits the data that was not properly received by the receiving side based on the information fed back from the data receiving side. For example, the data transmitting side is a base station device, the data receiving side is a terminal device, the data is a transport block (transport block transmitted / received by PDSCH), and the data error detection result and reception result are HARQ-ACK. Efficient communication is achieved by realizing appropriate retransmission control. One aspect of the present invention provides a terminal device, a base station device, a communication method used for the terminal device, and a communication method used for the base station device for efficient communication.

(1) The first aspect of the present invention is a terminal device including a processor and a memory for storing a computer program code, which is a periodic resource in an uplink cell managed by the first base station device. The operation including setting the HARQ-ACK codebook including the HARQ-ACK for the PDSCH of the downlink cell managed by the second base station apparatus is executed by the periodic resource.

(2) Further, the HARQ-ACK codebook is composed of a plurality of HARQ-ACKs, and each of the HARQ-ACKs corresponds to a different HARQ process.

(3) Further, when the HARQ-ACK codebook is transmitted, the HARQ-ACK for each stored HARQ process is reset.

(4) Further, the uplink cell managed by the second base station device is not configured for the terminal device.

(5) A second aspect of the present invention is a base station device including a processor and a memory for storing a computer program code, and sets periodic resources in an uplink cell with respect to the terminal device. That, the HARQ-ACK codebook including the HARQ-ACK for the PDSCH of the downlink cell managed by the different base station device is received from the terminal device with the periodic resource, and the received HARQ-ACK is received from the different base station. Perform actions, including transferring to the device.

(6) Further, the HARQ-ACK codebook is composed of a plurality of HARQ-ACKs, and each of the HARQ-ACKs corresponds to a different HARQ process.

(7) A third aspect of the present invention is a communication method used for a terminal device, in which a step of setting a periodic resource in an uplink cell managed by the first base station device and a second step. It includes a step of transmitting a HARQ-ACK codebook including HARQ-ACK for PDSCH of a downlink cell managed by a base station apparatus with the periodic resource.

(8) Further, the HARQ-ACK codebook is composed of a plurality of HARQ-ACKs, and each of the HARQ-ACKs corresponds to a different HARQ process.

(9) Further, when the HARQ-ACK codebook is transmitted, the step of resetting the HARQ-ACK for each stored HARQ process is included.

(10) Further, the uplink cell managed by the second base station device is not configured for the terminal device.

(11) A fourth aspect of the present invention is a communication method used for a base station device, in which a step of setting a periodic resource in an uplink cell for a terminal device and a step managed by a different base station device are managed. A step of receiving a HARQ-ACK codebook including HARQ-ACK for PDSCH of a downlink cell from the terminal device with the periodic resource, a step of transferring the received HARQ-ACK to the different base station device, and a step of transferring the received HARQ-ACK to the different base station device. including.

(12) Further, the HARQ-ACK codebook is composed of a plurality of HARQ-ACKs, and each of the HARQ-ACKs corresponds to a different HARQ process.

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

It is a conceptual diagram of the wireless communication system which concerns on one aspect of this Embodiment. ^{This is an example showing the relationship between the N slot} _symb , the setting μ of the subcarrier interval, the slot setting, and the CP setting according to one aspect of the present embodiment. This is an example showing the configuration of a radio frame, a subframe, and a slot according to one aspect of the present embodiment. It is a schematic diagram which shows an example of the resource grid in the subframe which concerns on one aspect of this Embodiment. It is a figure which shows an example of the structure of one REG which concerns on one aspect of this Embodiment. It is a figure which shows the structural example of CCE which concerns on one aspect of this Embodiment. It is a figure which shows an example of the relation between the number of REGs constituting the group of REGs which concerns on one aspect of this Embodiment, and the mapping method of a PDCCH candidate. It is a schematic block diagram which shows the structure of the terminal apparatus 1 which concerns on one aspect of this Embodiment. It is a schematic block diagram which shows the structure of the base station apparatus 3 which concerns on one aspect of this Embodiment. It is a figure which shows an example of the search area set in the terminal apparatus 1 which concerns on one aspect of this Embodiment. It is a figure which shows an example of the search area set in the terminal apparatus 1 which concerns on one aspect of this Embodiment. It is a figure which shows an example of the search area set in the terminal apparatus 1 which concerns on one aspect of this Embodiment. It is a figure which shows an example of the search area set in the terminal apparatus 1 which concerns on one aspect of this Embodiment.

Hereinafter, embodiments of the present invention will be described.

"A and / or B" may be a term including "A", "B", or "A and B".

When a parameter or information indicates one or more values, the parameter or information may include at least a 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 one aspect of the present embodiment. In FIG. 1, the wireless communication system includes terminal devices 1A to 1C and base station devices 3A to 3B. Hereinafter, the terminal devices 1A to 1C are also referred to as a terminal device 1 (UE). Hereinafter, the base station devices 3A to 3B are also referred to as base station devices 3 (gNB).

The base station device 3 may be configured to include one or both of MCG (Master Cell Group) and SCG (Secondary Cell Group). MCG is a group of serving cells composed of at least PCell (Primary Cell). An SCG is a group of serving cells composed of at least PSCell (Primary Secondary Cell). The PCell may be a serving cell given based on the initial connection. The MCG may be configured to include one or more SCells (Secondary Cells). The SCG may be configured to include one or more SCells. A serving cell identifier is a short identifier for identifying a serving cell. The serving cell identifier may be given by a higher layer parameter.

The terminal device 1 communicates with the base station device 3A (first base station device) and the base station device 3B (second base station device) at the same time. The base station device 3A and the base station device 3B communicate with the terminal device 1 using different frequency spectra (carrier frequencies). This operation may be referred to as carrier aggregation, or dual connectivity. The communication between the terminal device 1 and the base station device 3A and the communication between the terminal device 1 and the base station device 3B are each composed of different cells (serving cells). The base station apparatus 3A uses the downlink frequency spectrum and the uplink frequency spectrum. The base station apparatus 3B uses only the downlink frequency spectrum. The base station device 3A and the base station device 3B are connected by wire or wirelessly, and control information, data, and the like are exchanged. For example, the control information is HARQ-ACK. The terminal device 1 makes an initial connection with the base station device 3A. After the connection with the base station device 3A is established, the terminal device 1 is added with the connection with the base station device 3B. The terminal device 1 is added with a frequency spectrum used for communication. A cell (serving cell) used for communication is added to the terminal device 1.

The frame configuration will be described below.

At least OFDM (Orthogonal Frequency Division Multiplex) is used in the wireless communication system according to one aspect of the present embodiment. An OFDM symbol is a unit of the OFDM time domain. The OFDM symbol comprises at least one or more subcarriers. The OFDM symbol may be converted into a time-continuous signal in the 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 BWP (BandWidth Part), the subcarrier spacing setting μ may be given by the upper layer parameters.

In the wireless communication system according to one aspect of the present embodiment, a time unit (time unit) T _c is used to express 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 spacing supported in the wireless communication system according to one 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 and 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 length of the subframe. The number of slots contained in the subframe may be given, at least based on the constant κ. Δf _ref is the reference subcarrier interval, and N _{f and ref} are values corresponding to the reference subcarrier interval.

Transmission on the downlink and / or transmission on the uplink consists of 10 ms frames. The frame is composed of 10 subframes. The length of the subframe 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.

The number and index of slots contained in a subframe may be given for a given subcarrier spacing setting μ. For example, the first slot number n ^μ _s may be given in ascending order in the range of 0 to N ^{subframe, μ} _{slot -1 within the subframe.} The number and index of slots contained in the frame may be given for the setting μ of the subcarrier spacing. For example, the second slot numbers n ^μ _{s, f} may be given in ascending order in the range of 0 to N ^{frame, μ} _{slot -1 in the frame.} One slot may contain consecutive N ^slot _{symbs of OFDM symbols.} N ^slot _symbs may be given at least based on some or all of the slot configuration and / or CP (Cyclo Prefix) settings. The slot setting may be given by at least the upper layer parameter tdd-UL-DL-ConfigurationCommon. CP settings may be given at least based on higher layer parameters. CP settings may be given at least based on dedicated RRC signaling. The first slot number and the second slot number are also referred to as slot numbers (slot indexes).

^{FIG. 2 is an example showing the relationship between the N slot} _symb , the setting μ of the subcarrier interval, the slot setting, and the CP setting according to one aspect of the present embodiment. In FIG. 2A, when the slot setting is 0, the subcarrier interval setting μ is 2, and the CP setting is 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 at} slot setting 0 may correspond to twice the ^{N slot} _symb at slot setting 1.

In the terminal device 1, a common subcarrier interval setting, slot setting, and CP setting may be performed for each cell, or a different subcarrier interval setting, slot setting, and CP setting may be performed for each cell. .. In the base station device 3A and the base station device 3B, a common subcarrier interval setting, a slot setting, and a CP setting may be performed, or a different subcarrier interval setting, a slot setting, and a CP setting may be performed. good.

FIG. 3 is an example showing the configuration of the radio frame, the subframe, and the slot according to one aspect of the present embodiment. In the example shown in FIG. 3, the slot length is 0.5 ms, the subframe length is 1 ms, and the radio frame length is 10 ms. A slot may be a unit of resource allocation in the time domain. For example, a slot may be a unit to which one transport block is mapped. For example, the transport block may be mapped to one slot. Here, the transport block is transmitted within a predetermined interval (for example, transmission time interval (TTI: Transition Time Interval)) defined by an upper layer (for example, MAC: Media Access Control, RRC: Radio Response Control). It may be a unit of data.

For example, the slot length may be given by the number of OFDM symbols. For example, the number of OFDM symbols may be 7 or 14. The slot length may be given at least based on the length of the OFDM symbol. The length of the OFDM symbols may vary, at least based on the subcarrier spacing. Further, the length of the OFDM symbol may be given at least based on the number of points of the Fast Fourier Transform (FFT) used to generate the OFDM symbol. Further, the length of the OFDM symbol may include the length of the cyclic prefix (CP) added to the OFDM symbol. Here, the OFDM symbol may be referred to as a symbol. Further, when a communication method other than OFDM is used in the communication between the terminal device 1 and the base station device 3 (for example, when SC-FDMA or DFT-s-OFDM is used), the SC generated is generated. -FDMA symbols and / or DFT-s-OFDM symbols are also referred to as OFDM symbols. Further, unless otherwise specified, OFDM includes SC-FDMA or DFT-s-OFDM.

For example, the slot length may be 0.125 ms, 0.25 ms, 0.5 ms, 1 ms. For example, if the subcarrier spacing is 15 kHz, the slot length may be 1 ms. For example, if the subcarrier spacing is 30 kHz, the slot length may be 0.5 ms. For example, if the subcarrier spacing is 120 kHz, the slot length may be 0.125 ms. For example, if the subcarrier spacing is 15 kHz, the slot length may be 1 ms. For example, if the slot length is 0.125 ms, one subframe may consist of eight slots. For example, if the slot length is 0.25 ms, one subframe may consist of four slots. For example, when the slot length is 0.5 ms, one subframe may be composed of two slots. For example, when the slot length is 1 ms, one subframe may be composed of one slot.

Here, OFDM includes a multi-carrier communication method to which waveform shaping (Pulse Shape), PAPR reduction, out-of-band radiation reduction, or filtering, and / or phase processing (for example, phase rotation, etc.) are applied. The multi-carrier communication method may be a communication method in which a plurality of subcarriers generate / transmit a multiplexed signal.

The wireless frame may be given by the number of subframes. The number of subframes for the radio frame may be, for example, 10. The radio frame may be given by the number of slots.

In the terminal device 1, a common wireless frame configuration, a subframe configuration, and a slot configuration may be set for each cell, or a different wireless frame configuration, a subframe configuration, and a slot may be set for each cell. Configuration may be set. A common radio frame configuration, a subframe configuration, and a slot configuration may be set in the base station device 3A and the base station device 3B, or different radio frame configurations, subframe configurations, and The slot configuration may be set.

The physical resources will be explained below.

An antenna port is defined by the fact that the channel through which a symbol is transmitted in one antenna port can be estimated from the channel in which another symbol is transmitted in the same antenna port. If the large scale property of the channel on 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, the two antenna ports are QCL (Quantum Co-Located). ) Is called. Large scale characteristics may include at least the long interval characteristics of the channel. Large-scale characteristics include delay spread, Doppler spread, Doppler shift, average gain, average delay, average delay, and beam parameters (spray). It may include at least some or all. The fact that the first antenna port and the second antenna port are QCL with respect to the beam parameters means that the receiving beam assumed by the receiving side with respect to the first antenna port and the receiving beam assumed by the receiving side with respect to the second antenna port. May be the same. The fact that the first antenna port and the second antenna port are QCL with respect to the beam parameters means that the transmitting beam assumed by the receiving side with respect to the first antenna port and the transmitting beam assumed by the receiving side with respect to the second antenna port. May be the same. The terminal device 1 assumes that the two antenna ports are QCLs when the large-scale characteristics of the channel through 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. May be done. The fact that the two antenna ports are QCLs may mean that the two antenna ports are QCLs.

^{A resource grid of N μ} _{RB, x} N ^RB _sc subcarriers and N ^(μ) _simb N ^{subframe, μ} _symb OFDM symbols is provided for each of the subcarrier spacing settings and carrier sets. N ^mu _{RB, x} may indicate the number of resource blocks are provided for setting mu subcarrier spacing for the carrier x. N ^μ _{RB, x} may be the maximum number of resource blocks given for setting the subcarrier spacing μ 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 that includes ^{N μ} _{RB, DL} , and / or N ^μ _{RB, UL.} ^NRB _sc may indicate the number of subcarriers contained in one resource block. At least one resource grid may be provided for each antenna port p and / or for each subcarrier spacing setting μ and / or for each Transmission direction setting. The transmission direction includes at least a downlink (DL: DownLink) and an uplink (UL: UpLink). Hereinafter, a set of parameters including at least a part or all of the antenna port p, the subcarrier interval setting μ, and the transmission direction setting is also referred to as a first radio parameter set. That is, one resource grid may be given for each first set of radio parameters.

In the downlink, the carrier included in the serving cell is referred to as a downlink carrier (or downlink component carrier). In the uplink, the carrier included in the serving cell is referred to as an uplink carrier (uplink component carrier). The downlink component carrier and the uplink component carrier are collectively referred to as a component carrier (or carrier).

Each element in the resource grid given for each first set of radio parameters is referred to as a resource element. The resource element is specified by the _{frequency domain index k sc} and the time domain index l _sym. For a first set of radio parameters, resource elements are identified by a _{frequency domain index k sc} and a time domain index l _sym. The resource element specified by the frequency domain index k _sc and the time domain index l _sym is also referred to as _{a resource element (k sc} , l _sym). 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 given for setting the subcarrier spacing μ. N ^RB _sc is the number of subcarriers contained in the resource block, and N ^RB _sc = 12. The frequency domain index k _sc may correspond to the subcarrier index k _sc. The time domain index l _sym may correspond to the OFDM symbol index l _sym.

FIG. 4 is a schematic view showing an example of a resource grid in the subframe according to one aspect of the present embodiment. In the resource grid of FIG. 4, 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 contains N ^μ _RB N ^RB _sc subcarriers. In one subframe, the time domain of the resource grid may contain 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 a 1 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.

FIG. 4 shows an example of a resource grid in one cell.

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, also referred to as BWP, may be given based on at least some or all of the upper layer parameters and / or DCI. BWP is also referred to as a band part (BP: Bandwidth Part). That is, the terminal device 1 may not be instructed to perform transmission / reception using all sets of resource grids. That is, the terminal device 1 may be instructed to perform transmission / reception using a part of the 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 continuous resource blocks in the frequency domain. The BWP set for the downlink carrier is also referred to as the downlink BWP. The BWP set for the uplink carrier is also referred to as an uplink BWP.

One or more downlink BWPs may be set for the terminal device 1. The terminal device 1 may attempt to receive a physical channel (eg, PDCCH, PDSCH, SS / PBCH, etc.) on one downlink BWP of one or more 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 to transmit a physical channel (eg, PUCCH, PUSCH, PRACH, etc.) in one of the uplink BWPs of one or more uplinks BWP. The one uplink BWP is also referred to as an activated uplink BWP.

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

The upper layer parameter is a parameter included in the upper layer signal. The signal of the upper layer may be RRC (Radio Access Control) signaling or MAC CE (Medium Access Control Control Element). Here, the signal of the upper layer may be a signal of the RRC layer or a signal of the MAC layer.

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) Mapped to BCCH logical channel or CCCH logical channel Feature C2) Mapped to feature C3) PBCH containing at least a radioRelocationConfigCommon information element

The radioResourceConfigCommon information element may include information indicating a setting commonly used in the serving cell. The settings commonly used in the serving cell may include at least the PRACH setting. The PRACH setting may indicate at least one or more random access preamble indexes. The PRACH setting may indicate at least the PRACH time / frequency resource.

The upper layer signal may be dedicated RRC signaling. Dedicated RRC signaling may include at least some or all of the following features D1 to D2.
Feature D1) Map to DCCH logical channel Feature D2) Includes at least a radioResourceControlDedicated information element

The radioResourceControlDedicated information element may include at least information indicating a setting unique to the terminal device 1. The radioResourceControlDedicated information element may include at least information indicating the setting of the BWP. The BWP settings may at least indicate the 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, messages in the upper layer that are mapped to the DCCH logical channel and include at least the radioResourceConfigCommon may be included in the common RRC signaling. Further, the message of the upper layer which is mapped to the DCCH logical channel and does not include the radioResourceConfigCommon information element may be included in the dedicated RRC signaling. Further, the upper layer messages that are mapped to the DCCH logical channel and include at least the radioResourceControlDedicated 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 referred to as an SS / PBCH block (SS / PBCH block). The SS / PBCH block is also referred to as SS / PBCH. The first system information may include at least information related to the PRACH resource. The first system information may include at least information related to the initial connection settings. The second system information may be system information other than the first system information.

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

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

The uplink physical channel may correspond to a set of resource elements that carry information that occurs in the upper 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). Uplink control information includes channel state information (CSI: Channel State Information), scheduling request (SR: Scheduling Request), transport block (TB: Transport block, MAC PDU: Medium Access Control, Digital Protocol DataU). -Includes a part or all of HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) corresponding to Sharp Channel, PDSCH: Physical Downlink Shared Channel. The uplink control information may include information not described above.

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

Scheduling Request (SR) may be at least used to request PUSCH resources 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". A positive SR may indicate that terminal device 1 requires PUSCH resources for initial transmission. A positive SR may indicate that the scheduling request is Triggered by the upper layer. A positive SR may be sent when the higher layer instructs it to send a scheduling request. The fact that the scheduling request bit indicates a negative SR is also referred to as "a negative SR is transmitted". A negative SR may indicate that terminal device 1 does not require PUSCH resources for initial transmission. A negative SR may indicate that the scheduling request is not triggered by the upper layer. Negative SRs may be sent if the higher layer does not instruct them to send scheduling requests.

The channel state information may include at least a 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 the quality of the channel (for example, propagation intensity), and PMI is an index indicating the precoder. RI is an index that indicates the transmission rank (or the number of transmission layers).

PUCCH may support one or more PUCCH formats (PUCCH format 0 to PUCCH format 4). The PUCCH format may be mapped to the PUCCH and transmitted. The PUCCH format may be transmitted in PUCCH. The transmission of the PUCCH format may mean that the PUCCH is transmitted.

PUSCH is at least used to transmit transport blocks (TB, MAC PDU, UL-SCH, PUSCH). PUSCH may be used to transmit at least some or all of the transport block, HARQ-ACK, channel state information, and scheduling requests. PUSCH is at least used to send the random access message 3. PUSCH may be used to transmit information not described above.

PRACH is at least used to send a random access preamble (random access message 1). The PRACH is part or all of the initial connection establishment procedure, the handover procedure, the connection re-station procedure, the synchronization for the transmission of the PUSCH (timing adjustment), and the request for resources for the 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 does not have to be used to transmit the information output from the upper layer, but it is used by the physical layer.
-UL DMRS (UpLink Demodulation Reference Signal)
・ SRS (Sounding Reference Signal)
-UL PTRS (UpLink Phase Tracking Reference Signal)

UL DMRS is associated with PUSCH and / or PUCCH transmission. UL DMRS is multiplexed with PUSCH or PUCCH. The base station apparatus 3 may use UL DMRS to correct the propagation path of PUSCH or PUCCH. Hereinafter, transmitting both the PUSCH and the UL DMRS related to the PUSCH is referred to simply as transmitting the PUSCH. Hereinafter, transmitting PUCCH and UL DMRS related to the PUCCH together is referred to simply as transmitting PUCCH. UL DMRS related to PUSCH is also referred to as UL DMRS for PUSCH. UL DMRS related to PUCCH is also referred to as UL DMRS for PUCCH.

SRS does not have to be related to PUSCH or PUCCH transmission. The base station apparatus 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 at least a reference signal used for phase tracking. The UL PTRS may be associated with a UL DMRS group that includes at least the antenna ports used for one or more UL DMRSs. The association between the UL PTRS and the UL DMRS group may be that the antenna port of the UL PTRS and a part or all of the antenna ports included in the UL DMRS group are at least QCL. The UL DMRS group may be identified at least based on 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. UL PTRS may be mapped to the first layer if one codeword is at least mapped to the first layer and the second layer. UL PTRS does not have to be mapped to the second layer. The index of the antenna port to which the UL PTRS is mapped may be given at least based on the downlink control information.

Note that uplink physical signals not described above may be used.

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

PBCH is at least used to transmit a master information block (MIB: Master Information Block, BCH, Broadcast Channel). 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 the information contained in the PBCH may be updated every 80 ms. Some or all of the information contained 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 portion of the slot number, subframe number, and / or radio frame number through which the PBCH is transmitted.

PDCCH is at least used for transmitting 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 referred to as DCI format. The downlink control information may include at least one of a downlink grant (DL grant) and an uplink grant (UL grant). The DCI format used for PDSCH scheduling is also referred to as the downlink DCI format. The DCI format used for PUSCH scheduling is also referred to as the uplink DCI format. The downlink grant is also referred to as a downlink assignment (DL assignment) or a downlink assignment (DL allocation). The uplink DCI format includes at least one or both of DCI format 0_0 and DCI format 0_1.

DCI format 0_0 is configured to include at least part or all of 1A to 1F.
1A) DCI format specific field (Identifier for DCI forms field)
1B) Frequency domain resource allocation field (Frequency domain resource field)
1C) Time domain resource allocation field (Time domain resource allocation field)
1D) Frequency hopping flag field
1E) MCS field (MCS field: Modulation and Coding Scene field)
1F) CSI request field (CSI request field)

The DCI format specific field may be at least used to indicate whether the DCI format including the DCI format specific field corresponds to one or more DCI formats. The one or more DCI formats may be given at least on the basis of DCI format 1_1, DCI format 1-11, DCI format 0_0, and / or part or all of DCI format 0_1.

The frequency domain resource allocation field may at least be used to indicate the allocation of frequency resources for the PUSCH scheduled by the DCI format that includes the frequency domain resource allocation field. The frequency domain resource allocation field is also referred to as an FDRA (Frequency Domain Resource Allocation) field.

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

The frequency hopping flag field may at least be used to indicate whether frequency hopping is applied to the 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 PUSCH scheduled by the DCI format containing the MCS field and / or part or all of the target code rate. The target code rate may be the target code rate for the transport block of the PUSCH. The size of the transport block (TBS: Transport Block Size) may be given at least based on the target code rate.

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

DCI format 0-1 is configured to include at least part or all of 2A to 2H.
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) CSI request field (CSI request field)
2G) BWP field (BWP field)
2H) UL DAI field (downlink assignment index)

The UL DAI field is at least used to indicate the PDSCH transmission status. When a dynamic HARQ-ACK codebook is used, the size of the UL DAI field may be 2 bits. The UL DAI field indicates the size of the HARQ-ACK codebook transmitted by PUSCH. The UL DAI field indicates the number of HARQ-ACKs included in the HARQ-ACK codebook transmitted by PUSCH. The UL DAI field indicates the number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted by PUSCH. The UL DAI field indicates the number of PDSCHs and SPS releases that include the corresponding HARQ-ACK in the HARQ-ACK codebook transmitted by PUSCH.

The UL DAI field may indicate a value to which a modulo operation is applied. An example in which the UL DAI field has 2 bits will be described. When the number of PDSCHs including the corresponding HARQ-ACK in the HARQ-ACK codebook transmitted by PUSCH is 0, "00" is displayed as the UL DAI field. When the number of PDSCHs including the corresponding HARQ-ACK in the HARQ-ACK codebook transmitted by PUSCH is 1, "01" is indicated as the UL DAI field. When the number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted by PUSCH is 2, "10" is indicated as the UL DAI field. When the number of PDSCHs including the corresponding HARQ-ACK in the HARQ-ACK codebook transmitted by PUSCH is 3, "11" is indicated as the UL DAI field. When the number of PDSCHs including the corresponding HARQ-ACK in the HARQ-ACK codebook transmitted by PUSCH is 4, "00" is indicated as the UL DAI field. When the number of PDSCHs including the corresponding HARQ-ACK in the HARQ-ACK codebook transmitted by PUSCH is 5, "01" is indicated as the UL DAI field. When the number of PDSCHs including the corresponding HARQ-ACK in the HARQ-ACK codebook transmitted by PUSCH is 6, "10" is indicated as the UL DAI field. When the number of PDSCHs including the corresponding HARQ-ACK in the HARQ-ACK codebook transmitted by PUSCH is 7, "11" is indicated as the UL DAI field. In this example, in the HARQ-ACK codebook transmitted by PUSCH, a modulo operation using the numerical value '4' is performed on the number of PDSCHs including the corresponding HARQ-ACK.

The terminal device 1 interprets the UL DAI field in consideration of the total number of PDSCHs received. For example, the terminal device 1 has received four PDSCHs and receives a UL DAI field indicating "00". In this case, the terminal device 1 interprets that the number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted by the PUSCH indicated by the UL DAI field is four. For example, the terminal device 1 has received three PDSCHs and receives a UL DAI field indicating "00". In this case, the terminal device 1 interprets that the number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted by the PUSCH indicated by the UL DAI field is four, and the terminal device 1 interprets that the number of PDSCHs is four. Judge that the reception was missed.

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

The CSI request field is at least used to direct CSI reporting. The size of the CSI request field may be given at least based 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.

DCI format 1_0 is configured to include at least part or all of 3A to 3H.
3A) DCI format specific field (Identifier for DCI forms field)
3B) Frequency domain resource allocation field (Frequency domain resource field)
3C) Time domain resource allocation field (Time domain resource allocation field)
3D) Frequency hopping flag field
3E) MCS field (MCS field: Modulation and Coding Scene field)
3F) First CSI request field (First CSI request field)
3G) PDSCH-to-HARQ feedback timing indicator field (PDSCH-to-HARQ feedback timing indicator field)
3H) PUCCH resource indicator field

The timing instruction field from PDSCH to HARQ feedback may be a field indicating timing K1. When the index of the slot containing the last OFDM symbol of the PDSCH is slot n, the index of the PUCCH containing at least HARQ-ACK corresponding to the transport block contained in the PDSCH or the slot containing the PUSCH is n + K1. May be good. When the index of the slot containing the last OFDM symbol of the PDSCH is slot n, the first OFDM symbol of the PUCCH containing at least HARQ-ACK corresponding to the transport block contained in the PDSCH or the first OFDM symbol of the PUSCH 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 instruction field may be a field indicating an index of one or more PUCCH resources included in the PUCCH resource set.

The DCI format 1-11 is configured to include at least a part or all of 4A to 4J.
4A) DCI format specific field (Identifier for DCI forms field)
4B) Frequency domain resource allocation field (Frequency domain resource field)
4C) Time domain resource allocation field (Time domain resource allocation field)
4D) Frequency hopping flag field
4E) MCS field (MCS field: Modulation and Coding Scene field)
4F) First CSI request field (First CSI request field)
4G) PDSCH-to-HARQ feedback timing indicator field (PDSCH-to-HARQ feedback timing indicator field)
4H) 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 in DCI format 1-11 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 a slot format index (SFI: Slot Form Indicator). A pattern indicating whether each subframe (slot) in a plurality of subframes (slots) is an uplink subframe (slot), a downlink subframe (slot), or a flexible subframe (slot) is It may be transmitted and received using the downlink control information. The terminal device 1 may determine that the received subframe (slot) not indicated by the SFI is a flexible subframe (slot). When the transmission of PUSCH is scheduled by UL grant to the flexible subframe (slot), the terminal device 1 processes the flexible subframe (slot) as an uplink subframe (slot). When the transmission of PUSCH to the flexible subframe (slot) is not scheduled by UL grant, the terminal device 1 monitors the PDCCH candidate in the flexible subframe (slot) and performs a process of detecting DL association. .. When the reception of PDSCH is scheduled by DL assert in the flexible subframe (slot), the terminal device 1 processes the flexible subframe (slot) as a downlink subframe (slot).

For example, downlink control information including downlink grant or uplink grant is transmitted / received by PDCCH including C-RNTI (Cell-Radio Network Temporary Identifier).

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

The downlink grant is at least used for scheduling one PDSCH in one serving cell. The downlink grant is at least used for scheduling PDSCH in the same slot in which the downlink grant was transmitted. The downlink grant may be used for scheduling PDSCH in a slot different from the slot in which the downlink grant was transmitted. Uplink grants are used at least for scheduling one PUSCH in one serving cell.

Note that the various DCI formats may further include fields different from the above-mentioned fields. For example, a field (NFI: New Feedback Indicator field) indicating whether or not the HARQ-ACK information of PDSCH is correctly detected may be included. A field (NFI field) indicating whether or not to erase (flash) the HARQ-ACK bit stored in a recording medium such as a memory may be included. A field (NFI field) indicating whether or not to include the retransmission of the transmitted HARQ-ACK codebook may be included. A field (PGI: PDSCH Group ID field) indicating the PDSCH group to which the PDSCH scheduled by the DCI format belongs (associates) may be included. A field (RPGI: Request PDSCH Group ID field) indicating a PDSCH group instructed to transmit HARQ-ACK information may be included. A field (C-DAI: Counter Downlink Assignment Index field) indicating the cumulative number of transmitted PDCCHs may be included. A field (T-DAI: Total Downlink Assignment Index field) indicating the total number of PDCCHs to be transmitted may be included.

The terminal device 1 may be associated with a PDSCH group identifier (PGI: PDSCHGroupID) for each PDSCH. The PGI of a PDSCH may be indicated at least based on the DCI format used to schedule the PDSCH. For example, a field indicating PGI (PGI field) may be included in the DCI format. For example, the PDSCH group may be a set of PDSCHs having the same PGI (PDSCH group identifier). The PDSCH group may be one PDSCH or a set of one or more PDSCHs associated with the same PGI. The number of PDSCH groups set for the terminal device 1 may be 1, 2, 3, 3, 4, or any other PDSCH group. It may be an integer greater than or equal to 0.

The requested PDSCH group (RPG: Requested PDSCH Group) may be a PDSCH group corresponding to the HARQ-ACK information transmitted (reported) via the next PUCCH or PUSCH. The RPG (request PDSCH group) may include one PDSCH group or may include a plurality of PDSCH groups. The RPG instructions may be given corresponding to each PDSCH group in the form of a bitmap, at least based on the DCI format. The RPG may be indicated at least based on the RPGI field contained in the DCI format. The terminal device 1 may generate a HARQ-ACK codebook for the instructed RPG and transmit (report) it via PUCCH or PUSCH.

The value of K1 (information or parameter indicated by the timing indicator field from PDSCH to HARQ feedback) indicated by the DCI format included in the PDCCH may be numerical or non-numerical. ) May be. Here, the numerical value means a value represented by a numerical value, for example, {0, 1, 2, ... .. .. , 15}. A non-numeric value may mean a non-numeric value or may mean no numerical value. Hereinafter, the operation of the numerical value of K1 and the non-numerical value of K1 will be described. For example, the PDSCH scheduled in the DCI format is transmitted in the base station apparatus 3 in slot n and received in the terminal apparatus 1. When the value of K1 indicated by the DCI format is a numerical value, the terminal device 1 may transmit (report) HARQ-ACK information corresponding to the PDSCH in slot n + K1 via PUCCH or PUSCH. If the value of K1 indicated by the DCI format is non-numeric, the terminal device 1 may postpone reporting the HARQ-ACK information corresponding to the PDSCH. If the DCI format containing the PDSCH scheduling information indicates a non-numeric value of K1, the terminal device 1 may postpone reporting the HARQ-ACK information corresponding to the PDSCH. For example, the terminal device 1 stores the HARQ-ACK information in a recording medium such as a memory, does not transmit (report) the HARQ-ACK information via the next PUCCH or PUSCH, and does not transmit (report) the HARQ-ACK information other than the above-mentioned DCI format. The transmission of the HARQ-ACK information may be triggered to transmit (report) the HARQ-ACK information based on at least the DCI format.

The non-numeric value of K1 may be included in the series of upper layer parameters. The upper layer parameter may be the upper layer parameter dl-DataToUL-ACK. The upper layer parameter may be an upper layer parameter different from the upper layer parameter dl-DataToUL-ACK. The value of K1 may be a value indicated by a timing instruction field from PDSCH to HARQ feedback included in the DCI format in the series of upper layer parameters. For example, it is assumed that the sequence of upper layer parameters is set to {0,1,2,3,4,5,15, non-numeric value}, and the number of bits of the timing instruction field from PDSCH to HARQ feedback is 3. If so, the code point “000” in the timing instruction field from PDSCH to HARQ feedback may indicate that the value of K1 is 0, and the code point “001” indicates that the value of K1 is 1. Alternatively, the code point "111" may indicate that the value of K1 is a non-numeric value. For example, it is assumed that the sequence of upper layer parameters is set to {non-numeric value, 0,1,2,3,4,5,15} and the number of bits of the timing instruction field from PDSCH to HARQ feedback is 3. If so, the code point “000” in the timing instruction field from PDSCH to HARQ feedback may indicate that the value of K1 is a non-numeric value, and the code point “001” may indicate that the value of K1 is 0. This may be indicated, or the code point “111” may indicate that the value of K1 is 15.

The HARQ-ACK bits (HARQ-ACK information) corresponding to the transport blocks transmitted and received in the downlink frequency band (frequency spectrum, carrier, component carrier) of the base station apparatus 3A are included in the DCI format in the above-mentioned various fields. (PDSCH-to-HARQ feedback timing indicator field, HARQ indicator field, PUCCH resource indicator field, NFI field, PGI field, RPGI field, C-DAI field, T-DAI field, UL DAI field) It is transmitted and received in the uplink frequency band (frequency spectrum, carrier, component carrier) of the base station apparatus 3A by the above method.

The HARQ-ACK bit (HARQ-ACK information) corresponding to the transport block transmitted / received in the downlink frequency band (frequency spectrum, carrier, component carrier) of the base station device 3B is the uplink frequency band of the base station device 3A. It is transmitted and received using preset periodic resources in (frequency spectrum, carrier, component carrier). Here, the timing (time resource) for transmitting and receiving the HARQ-ACK bit (HARQ-ACK information) is not specified by the DCI format. Here, the resources (resource block, code) in the frequency domain in which the HARQ-ACK bit (HARQ-ACK information) is transmitted / received are not indicated by the DCI format. Here, the PDSCH group to which the transmitted / received HARQ-ACK bit (HARQ-ACK information) belongs is not indicated by the DCI format, and the HARQ-ACK bit (HARQ-ACK information) for each HARQ passage of the downlink of the base station device 3B. Is transmitted and received in the uplink frequency band of the base station device 3A. The HARQ-ACK bit (HARQ-ACK information) corresponding to the transport block transmitted and received in the downlink frequency band of the base station device 3B is a HARQ-ACK codebook composed of HARQ-ACK bits corresponding to a plurality of HARQ processes. Is transmitted and received using. Each time this HARQ-ACK codebook is transmitted, the HARQ-ACK bit (HARQ-ACK information) held in the terminal device 1 for each HARQ-process is reset or flushed.

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

The terminal device 1 may be set with one or more control resource sets (CORESET: Control REsource SET). The terminal device 1 monitors the PDCCH in one or more control resource sets. Here, monitoring PDCCH in one or more control resource sets may include monitoring one or more PDCCHs corresponding to each of one or more control resource sets. The PDCCH may include one or more sets of PDCCH candidates and / or PDCCH candidates. Monitoring the PDCCH may also include monitoring and detecting the PDCCH and / or the DCI format transmitted via the PDCCH.

The control resource set may be a time-frequency region in 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 composed of continuous resources (Located resources). The control resource set may be composed of discontinuous 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 mapping of the control resource set may be 6 resource blocks. In the time domain, the control resource set mapping unit may be an OFDM symbol. For example, in the time domain, the unit of mapping of the control resource set may be 1 OFDM symbol.

The mapping of the control resource set to the resource block may be given at least based on the upper 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 given by six consecutive resource blocks.

The number of OFDM symbols that make up the control resource set may be given at least based on the upper layer parameters. For example, the start position of the OFDM symbols constituting the control resource set is notified from the base station apparatus 3 to the terminal apparatus 1 by using the signaling of the upper layer. For example, the end position of the OFDM symbols constituting the control resource set is notified from the base station apparatus 3 to the terminal apparatus 1 by using the signaling of the upper layer.

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 that is commonly set for a plurality of terminal devices 1. The common control resource set may be given at least based on the MIB, the first system information, the second system information, the common RRC signaling, and some or all of the cell IDs. For example, the time resources and / or frequency resources of the control resource set set to monitor the PDCCH used for scheduling the first system information may be given at least based on the MIB.

The control resource set set in the MIB is also called CORESET # 0. CORESET # 0 may be the control resource set of index # 0.

A certain 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 that is set to be used exclusively for the terminal device 1. The dedicated control resource set may be given based on at least some or all of the dedicated RRC signaling and C-RNTI values. 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 (CCEs) may be configured in the control resource set, and each CCE may be given an index (CCE index).

CCE may be configured to include one or more groups of REGs. The REG group is also referred to as the REG bundle. The number of REGs that make up one REG group is called the Bundle size. For example, the REG Bundle size may be any of 1, 2, 3, and 6. In interleaved mapping, an interleaver may be applied in units of REG bundles. The terminal device 1 may assume that the precoders applied to the REs in the REG group are the same. The terminal device 1 can perform channel estimation on the assumption that the precoders applied to REs in the REG group are the same. On the other hand, the terminal device 1 may assume that the precoders applied to the REs between the REG groups are not the same. In other words, the terminal device 1 does not have to assume that the precoders applied to REs between groups of REGs are the same. "Between REG groups" may be paraphrased as "between two different REG groups". The terminal device 1 can perform channel estimation on the assumption that the precoders applied to REs between groups of REGs are not the same.

The set of PDCCH candidates (PDCCH candidate) monitored by the terminal device 1 is defined from the viewpoint of the search area (Search space). That is, the set of PDCCH candidates monitored by the terminal device 1 is given by the search area.

The search area may be configured to include one or more PDCCH candidates at one or more aggregation levels. The aggregation level of PDCCH candidates may indicate the number of CCEs constituting the PDCCH. PDDCH candidates may be mapped to one or more CCEs.

The number of CCEs that make up the PDCCH candidate is also referred to as the aggregation level (AL). When one PDCCH candidate is composed of agglomeration of a plurality of CCEs, one PDCCH candidate is composed of a plurality of CCEs having consecutive CCE numbers. Aggregation level set of PDCCH candidates of AL _X is referred to as the search area of the aggregation level AL _X. That is, the search area of the aggregation level AL _X is aggregation level may be configured to include one or more PDCCH candidates of AL _X. The search region may also include multiple aggregation level PDCCH candidates. For example, CSS may include multiple aggregation level PDCCH candidates. For example, the USS may include multiple aggregation level PDCCH candidates. A set of aggregation levels of PDCCH candidates included in CSS and a set of aggregation levels of PDCCH candidates included in USS may be specified / set respectively.

The terminal device 1 may monitor at least one or a plurality of search areas in a slot in which DRX (Discontinuity reception) is not set. DRX may be given at least based on the upper layer parameters. The terminal device 1 may monitor at least one or a plurality of search area sets (Search paceset) in a slot 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 assigned to each search area.

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

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 that is commonly set for a plurality of terminal devices 1. The USS may be a search area that includes settings that are used exclusively for the individual terminal device 1. The CSS may be given at least based on the synchronization signal, MIB, first system information, second system information, common RRC signaling, dedicated RRC signaling, cell ID, and the like. USS may be given at least based on dedicated RRC signaling and / or C-RNTI values. The CSS may be a search area set as a common resource (control resource element) for a 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.

CSS is for type 0PDCCH CSS for SI-RNTI scrambled DCI format used to transmit system information in the primary cell, and for 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 the type for the DCI format scrambled by CC-RNTI used for Accessed 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.

The information related to the reception of the PDCCH may include the information related to the ID indicating the destination of the 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 referred to as RNTI (Radio Network Temporary Identifier). The information related to the reception of the PDCCH may include the information related to the ID used for scrambling the CRC bit added to the PDCCH. The terminal device 1 can attempt to receive the PDCCH based on at least the information related to the ID contained in the PBCH.

RNTI is SI-RNTI (System Information-RNTI), P-RNTI (Paging-RNTI), C-RNTI (Common-RNTI), Temporary C-RNTI (TC-RNTI), RA-RNTI (Random) , CC-RNTI (Common Control-RNTI), INT-RNTI (Interruption-RNTI) may be included. SI-RNTI is at least used for scheduling PDSCHs transmitted containing system information. P-RNTI is at least used for scheduling PDSCHs transmitted containing information such as paging information and / or system information change notifications. C-RNTI is at least used to schedule user data for RRC-connected terminal equipment 1. Temporary C-RNTI is at least used for scheduling the random access message 4. Temporary C-RNTI is at least used to schedule a PDSCH containing data that maps to CCCH in a logical channel. RA-RNTI is at least used for scheduling random access message 2. CC-RNTI is at least used for transmitting and receiving control information of Enhanced access. INT-RNTI is at least used to indicate pre-emption on 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 PDCCH / DCI schedules the PDSCH or PUSCH. You may.

When carrier aggregation (CA: carrier aggregation) is set for the terminal device 1 to aggregate a plurality of serving cells and / or a plurality of component carriers for communication (transmission and / or reception), a predetermined value is provided. The PDCCH and / or DCI contained in the USS for a serving cell (predetermined component carrier) includes a CIF indicating which serving cell and / or which component carrier the PDCCH / DCI is scheduling a PDSCH or PUSCH for. May be good.

When communicating with the terminal device 1 using one serving cell and / or one component carrier, the PDCCH / / or DCI included in the USS includes which serving cell and / or the PDCCH / DCI. Alternatively, a CIF indicating which component carrier the PDSCH or PUSCH is scheduled for 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.

The physical resources in the search area are composed of control channel configuration units (CCE: Control Channel Elements). CCE is composed of a predetermined number of resource element groups (REG: Resource Element Group). For example, CCE may consist of 6 REGs. The REG may be composed of one PRB (Physical Resource Block) 1 OFDM symbol. That is, the REG may be configured to include 12 resource elements (RE: Resource Element). PRB is also simply referred to as RB (Resource Block).

That is, the terminal device 1 can detect the PDCCH and / or DCI for the terminal device 1 by blindly detecting the PDCCH candidate included in the search area in the control resource set.

The number of blind detections for one control resource set in one serving cell and / or one component carrier is determined based on the type of search area for PDCCH included in the control resource set, the type of aggregation level, and the number of PDCCH candidates. May be done. Here, the type of search region may include at least one of CSS and / or USS and / or UGSS (UE Group SS) and / or GCSS (Group CSS). The type of aggregation level indicates the maximum aggregation level supported for the CCE constituting the search area, and is at least one of {1, 2, 4, 8, ..., X} (X is a predetermined value). It may be specified / set from the beginning. The number of PDCCH candidates may indicate the number of PDCCH candidates for a certain aggregation level. That is, the number of PDCCH candidates may be defined / set for each of the plurality of aggregation levels. The UGSS may be a search area commonly assigned to one or a plurality of terminal devices 1. The GCSS may be a search region in which a DCI containing parameters related to CSS is mapped to one or more terminal devices 1. The aggregation level indicates the aggregation level of a predetermined number of CCEs, and is related to the total number of CCEs constituting one PDCCH and / or the search area.

Note that the size of the aggregation level may be associated with the coverage corresponding to the PDCCH and / or the search area or the size of the DCI included in the PDCCH and / or the search area (DCI format size, payload size).

When the start position (start symbol) of the PDCCH symbol is set for one control resource set, and more than one PDCCH in the control resource set can be detected in a predetermined period. May be set for the time domain corresponding to each start symbol, the type of search area for PDCCH included in the control resource set, the type of aggregation level, and the number of PDCCH candidates. The type of search area, the type of aggregation level, and the number of PDCCH candidates for the PDCCH included in the control resource set may be set for each control resource set, and the DCI and / or upper layer signal (RRC signaling) may be set. ) May be provided / set, or may be specified / set in advance by the specifications. The number of PDCCH candidates may be the number of PDCCH candidates for a predetermined period. The predetermined period may be 1 millisecond. The predetermined period may be 1 microsecond. Further, the predetermined period may be a period of one slot. Further, the predetermined period may be the period of one OFDM symbol.

When there are more than one start position (start symbol) of the PDCCH symbol for one control resource set, that is, when there are a plurality of timings for blind detection (monitoring) of the PDCCH in a predetermined period, For the time domain corresponding to each start symbol, the type of search area for PDCCH included in the control resource set, the type of aggregation level, and the number of PDCCH candidates may be set respectively. The type of search area, the type of aggregation level, and the number of PDCCH candidates for the PDCCH included in the control resource set may be set for each control resource set, and may be set via the DCI and / or the signal of the upper layer. It may be provided / set, or it may be specified / set in advance by the specifications.

As a method of indicating the number of PDCCH candidates, the number to be reduced from the predetermined number of PDCCH candidates may be defined / set for each aggregation level.

The terminal device 1 may transmit / notify the base station device 3 of the capability information related to the blind detection. The terminal device 1 may transmit / notify the base station device 3 of the number of PDCCH candidates that can be processed in one subframe as capability information related to the PDCCH. The terminal device 1 may transmit / notify the base station device 3 of the capability information related to blind detection when more control resource sets than a predetermined number can be set for one or more serving cells / component carriers. good.

The terminal device 1 transmits capacity information related to blind detection to the base station device 3 when a predetermined number of control resource sets can be set for a predetermined period of one or more serving cells / component carriers. You may notify.

Note that the ability information related to the blind detection may include information indicating the maximum number of blind detections in a predetermined period. In addition, the ability information related to the blind detection may include information indicating that the PDCCH candidates can be reduced. In addition, the capability information related to the blind detection may include information indicating the maximum number of control resource sets that can be blind detected in a predetermined period. The maximum number of control resource sets and the maximum number of serving cells and / or component carriers capable of monitoring PDCCH may be set as individual parameters or as common parameters, respectively. In addition, the capability information related to the blind detection may include information indicating the maximum number of control resource sets capable of simultaneously performing blind detection in a predetermined period.

If the terminal device 1 does not support the ability to detect more control resource sets (blind detection) than the predetermined number in a predetermined period, the terminal device 1 transmits / notifies the ability information related to the blind detection. It does not have to be. When the base station apparatus 3 does not receive the capability information related to the blind detection, the base station apparatus 3 may make settings related to the control resource set and transmit the PDCCH so as not to exceed a predetermined number for the blind detection. ..

The settings related to the control resource set include a parameter indicating an index (ControlResourceSetId) that identifies the control resource set. Further, the setting related to the control resource set may include a parameter indicating the frequency resource area (the number of resource blocks constituting the control resource set) of the control resource set. In addition, the settings related to the control resource set may include a parameter indicating the type of mapping from CCE to REG. In addition, the settings related to the control resource set may include the REG bundle size. RRC signaling may be used to send and receive messages indicating settings for the control resource set. SIBs may be used to send and receive messages indicating settings related to control resource sets. The MIB may be used to send and receive messages indicating settings related to the control resource set.

The settings related to the search area include a parameter indicating an index that identifies the search area (search area index). The settings related to the search area include a parameter indicating the index of the control resource set in which the search area is located. The settings related to the search area may include parameters indicating the period and offset of the slot in which the search area is arranged. The settings related to the search area may include a parameter indicating the number of slots in which the search area is continuously arranged. The settings related to the search area may include a parameter indicating an OFDM symbol in the slot in which the PDCCH candidate is monitored. The settings related to the search area may include a parameter indicating the number of PDCCH candidates to be monitored for each CCE aggregation level. The settings related to the search area may include a parameter indicating the DCI format to be monitored. The settings for the search area may include parameters indicating the type of search area (CSS or USS). RRC signaling may be used to send and receive messages indicating settings relating to the search area. SIBs may be used to send and receive messages indicating settings related to the search area. A MIB may be used to send and receive messages indicating settings related to the search area.

PDSCH is at least used to send / receive transport blocks. The PDSCH may at least be used to send / receive a random access message 2 (random access response). The PDSCH may at least be used to transmit / receive 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 does not have to be used to transmit the information output from the upper layer, but it is used by the physical layer.
-Synchronization signal (SS: Synchronization signal)
-DL DMRS (DownLink Demodulation Reference Signal)
-CSI-RS (Channel State Information-Reference Signal)
-DL PTRS (DownLink Phase Tracking Reference Signal)

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

The SS block (SS / PBCH block) is composed of PSS, SSS, and at least a part or all of PBCH.

DL DMRS is associated with 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, PDCCH, or PDSCH. The terminal device 1 may determine that the base station device 3 is transmitting a signal based on the detection of DL DMRS.

CSI-RS may be at least a signal used to calculate channel state information. The pattern of CSI-RS assumed by the terminal device 1 may be given by at least the upper layer parameters.

The PTRS may be at least a signal used to compensate for phase noise. The pattern of PTRS assumed by the terminal device 1 may be given at least based on the 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.

Note that downlink physical signals not described above may be used.

The downlink physical channel and the downlink physical signal are also referred to as a downlink physical signal. Uplink physical channels and uplink physical signals are also referred to as uplink signals. The downlink signal and the uplink signal are also collectively referred to as 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 collectively referred to as 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. The channel used in the medium access control (MAC) 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. A transport block is a unit of data that the MAC layer passes to the physical layer (deliver). In the physical layer, the transport block is mapped to codewords, and modulation processing is performed for each codeword.

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

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

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

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

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

FIG. 5 is a diagram showing an example of the configuration of one REG according to one aspect of the present embodiment. The REG may be composed of one OFDM symbol of one PRB. That is, the REG may be composed of 12 consecutive REs in the frequency domain. A part of the plurality of REs constituting the REG may be a RE to which the downlink control information is not mapped. The REG may be configured to include a RE to which the downlink control information is not mapped, or may be configured to include a RE to which the downlink control information is not mapped. The RE to which the downlink control information is not mapped may be a RE to which the reference signal is mapped, a RE to which a channel other than the control channel is mapped, or a terminal device in which the control channel is not mapped. It may be the RE assumed by 1.

FIG. 6 is a diagram showing a configuration example of CCE according to one aspect of the present embodiment. The CCE may be composed of 6 REGs. As shown in FIG. 6A, CCE (CCE # 0) may be composed of continuously mapped REGs (such mappings may be referred to as localized mapping) (such mappings). May be referred to as non-interleaved CCE-to-REG mapping) (such mapping may be referred to as non-interleaved mapping). It should be noted that not all REGs constituting the CCE are necessarily continuous in the frequency domain. For example, if all of the plurality of resource blocks constituting the control resource set are not continuous in the frequency domain, even if the numbers assigned to the REGs are continuous, each resource block constituting each REG having consecutive numbers is Not continuous in the frequency domain. When a control resource set is composed of a plurality of OFDM symbols and a plurality of REGs constituting one CCE are arranged over a plurality of time intervals (OFDM symbols), the CCE (CCE) is as shown in FIG. 6 (b). # 1) may be composed of a group of REGs that are continuously mapped.

As shown in FIG. 6 (c), CCE (CCE # 2) may be composed of discontinuously mapped REGs (such mappings may be referred to as Distrived mapping) (such. The mapping may be referred to as interleaved CCE-to-REG mapping) (such mapping may be referred to as interleaved mapping). The REGs that make up the CCE using interleavers may be discontinuously mapped to resources in the time frequency domain. When a control resource set is composed of a plurality of OFDM symbols and a plurality of REGs constituting one CCE are arranged over a plurality of time intervals (OFDM symbols), the CCE (CCE) is as shown in FIG. 6 (d). # 3) may be composed of REGs in which REGs of different time intervals (OFDM symbols) are mixed and mapped discontinuously. As shown in FIG. 6 (e), the CCE (CCE # 4) may be composed of REGs that are distributed and mapped in groups of a plurality of REGs. As shown in FIG. 6 (f), the CCE (CCE # 5) may be composed of REGs that are distributed and mapped in groups of a plurality of REGs.

FIG. 7 is a diagram showing an example of the number of REGs constituting the PDCCH candidate and the REGs constituting the group of REGs according to one aspect of the present embodiment. In the example shown in FIG. 7A, the PDCCH candidate is mapped to one OFDM symbol, and three REG groups (REG group) including two REGs are configured. That is, in the example shown in FIG. 7A, one REG group is composed of two REGs. The number of REGs that make up a group of REGs in the frequency domain may include a divisor of the number of PRBs mapped in the frequency direction. In the example shown in FIG. 7A, the number of REGs constituting the group of REGs in the frequency domain may be 1, 2, 3, or 6.

In the example shown in FIG. 7B, PDCCH candidates are mapped to two OFDM symbols, and three REG groups including two REGs are configured. In the example shown in FIG. 7B, the number of REGs constituting the group of REGs in the frequency domain may be either 1 or 3.

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

FIG. 8 is a schematic block diagram showing the configuration of the terminal device 1 according to one aspect of the present embodiment. As shown in the figure, the terminal device 1 includes a wireless transmission / reception unit 10 and an upper layer processing unit 14. The radio transmission / reception unit 10 includes at least a part or all of an antenna unit 11, an RF (Radio Frequency) unit 12, and a baseband unit 13. The upper layer processing unit 14 includes at least a 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 physical layer processing unit includes a decoding unit. The receiving unit (also referred to as the receiving processing unit) of the terminal device 1 receives the PDCCH. The decoding unit of the terminal device 1 decodes the received PDCCH. More specifically, the decoding unit of the terminal device 1 performs blind decoding processing on the received signal of the resource corresponding to the USS PDCCH candidate. The decoding unit of the terminal device 1 performs brand decoding processing on the received signal of the resource corresponding to the PDCCH candidate of CSS. The reception processing unit of the terminal device 1 monitors PDCCH candidates in the control resource set. The reception processing unit of the terminal device 1 monitors PDCCH candidates in the control resource set.

The reception processing unit of the terminal device 1 monitors PDCCH candidates in the control resource set of the downlink frequency band (cell, component carrier, carrier) managed by the base station device 3A. The reception processing unit of the terminal device 1 monitors PDCCH candidates within the control resource set of the downlink frequency band (cell, component carrier, carrier) managed by the base station device 3B. The receiving unit of the terminal device 1 receives the PDSCH. The reception processing unit of the terminal device 1 performs a process of receiving the PDSCH in the downlink frequency band (cell, component carrier, carrier) managed by the base station device 3A. The reception processing unit of the terminal device 1 performs a process of receiving the PDSCH in the downlink frequency band (cell, component carrier, carrier) managed by the base station device 3B. The reception processing unit of the terminal device 1 performs processing such as demodulation and decoding on the PDSCH.

The transmission unit (also referred to as the transmission processing unit) of the terminal device 1 transmits HARQ-ACK. The transmission processing unit of the terminal device 1 transmits HARQ-ACK to the PDSCH. The transmission processing unit of the terminal device 1 transmits HARQ-ACK in the uplink frequency band (cell, component carrier, carrier) managed by the base station device 3A. The transmission processing unit of the terminal device 1 includes HARQ-ACK for the PDSCH of the downlink frequency band (cell, component carrier, carrier) managed by the base station device 3A, and the downlink frequency band (downlink frequency band) managed by the base station device 3B. HARQ-ACK for PDSCH of cell, component carrier, carrier) is transmitted. The transmission processing unit of the terminal device 1 includes HARQ-ACK for the PDSCH of the downlink frequency band (cell, component carrier, carrier) managed by the base station device 3A, and the downlink frequency band (downlink frequency band) managed by the base station device 3B. HARQ-ACK for the PDSCH of the cell, component carrier, carrier) is transmitted in the uplink frequency band (cell, component carrier, carrier) managed by the base station apparatus 3A. The transmission processing unit of the terminal device 1 transmits HARQ-ACK to the PDSCH of the downlink frequency band (cell, component carrier, carrier) managed by the base station device 3A by the first method, and manages it by the base station device 3B. The HARQ-ACK for the PDSCH of the downlink frequency band (cell, component carrier, carrier) to be performed is transmitted by the second method.

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

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

The radio resource control layer processing unit 16 included in the upper layer processing unit 14 processes the RRC layer. The wireless 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 signal of the upper layer received from the base station apparatus 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 apparatus 3. The setting information may include information related to processing or setting of a physical channel, a physical signal (that is, a physical layer), a MAC layer, a PDCP layer, an RLC layer, and an RRC layer. The parameter may be an upper layer parameter.

The radio resource control layer processing unit 16 sets the control resource set based on the RRC signaling received from the base station device 3. The radio resource control layer processing unit 16 sets a search area in the control resource set. The radio resource control layer processing unit 16 sets PDCCH candidates to be monitored in the control resource set. The radio resource control layer processing unit 16 sets the number of PDCCH candidates monitored in the control resource set. The radio resource control layer processing unit 16 sets the Aggression level of the PDCCH candidate monitored in the control resource set.

The wireless transmission / reception unit 10 performs physical layer processing such as modulation, demodulation, coding, 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 (converting it into a time continuous signal), and transmits the physical signal to the base station device 3.

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

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

The baseband unit 13 performs inverse fast Fourier transform (IFFT) on the data to generate an OFDM symbol, adds CP to the generated OFDM symbol, generates a baseband digital signal, and basebands the data. Converts a band digital signal into an analog signal. The baseband unit 13 outputs the converted analog signal to the RF unit 12.

The RF unit 12 removes an extra frequency component from the analog signal input from the baseband unit 13 using a low-pass filter, upconverts the analog signal to the carrier frequency, and transmits the analog signal via the antenna unit 11. do. Further, the RF unit 12 amplifies the electric power. Further, the RF unit 12 may have a function of controlling the transmission power. The RF unit 12 is also referred to as a transmission power control unit.

The terminal device 1 receives the PDCCH. The terminal device 1 receives the PDSCH. The radio resource control layer processing unit 16 sets the control resource set. The radio resource control layer processing unit 16 sets the search area. The radio resource control layer processing unit 16 sets a control resource set based on RRC signaling. The radio resource control layer processing unit 16 sets a search area based on RRC signaling. The receiving unit of the terminal device 1 monitors a plurality of PDCCH candidates within the search area of the set control resource set. The receiving unit of the terminal device 1 monitors a plurality of PDCCH candidates within the search area of the control resource set set in a certain slot. The decoding unit of the terminal device 1 decodes the monitored PDCCH candidate. The decoding unit of the terminal device 1 decodes the received PDSCH.

The receiving unit of the terminal device 1 monitors a set number of PDCCH candidates based on RRC signaling in the search area of the control resource set in a certain slot. The receiving unit of the terminal device 1 monitors a PDCCH candidate composed of one or more OFDM symbols set based on RRC signaling in the search area of the control resource set in a certain slot. The receiver of the terminal device 1 is a search area for the first half of the slot (for example, the first OFDM symbol, or the first and second OFDM symbols, or the first, second, and third OFDM symbols) in a certain slot. Monitor PDCCH candidates with. The receiver of the terminal device 1 is a search area for the first half of the slot (for example, the first OFDM symbol, or the first and second OFDM symbols, or the first, second, and third OFDM symbols) in a certain slot. Monitor PDCCH candidates with and search for PDCCH candidates in the search area of the second half of the slot (eg, the 8th OFDM symbol, or the 8th and 9th OFDM symbols, or the 8th, 9th, and 10th OFDM symbols). Monitor. The receiving unit of the terminal device 1 is a search area for different OFDM symbols in a certain slot, and even if three or more search areas are set and further dispersed in the slot to monitor PDCCH candidates. good.

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 one aspect of the present embodiment. As shown in the figure, the base station apparatus 3 includes a wireless transmission / reception unit 30 and an upper layer processing unit 34. The radio 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 processes the MAC layer.

The radio resource control layer processing unit 36 included in the upper layer processing unit 34 processes the RRC layer. The wireless resource control layer processing unit 36 generates downlink data (transport block), system information, RRC message, MAC CE, etc. arranged in the PDSCH, or acquires them from a higher-level node and outputs them to the wireless transmission / reception unit 30. .. Further, the wireless resource control layer processing unit 36 manages various setting information / parameters of each terminal device 1. The wireless resource control layer processing unit 36 may set various setting information / parameters for each terminal device 1 via a signal of the 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, a physical signal (that is, a physical layer), a MAC layer, a PDCP layer, an RLC layer, and an RRC layer. The parameter may be an upper layer parameter.

The wireless resource control layer processing unit 36 sets a control resource set for the terminal device 1. A plurality of PDCCH candidates are configured (set) within the set control resource set. The radio resource control layer processing unit 36 sets a search area for the terminal device 1.

The wireless resource control layer processing unit 36 sets a resource for transmitting HARQ-ACK to the terminal device 1. The radio resource control layer processing unit 36 of the base station apparatus 3A sets a resource for transmitting HARQ-ACK to the PDSCH of the downlink frequency band (cell, component carrier, carrier) managed by the base station apparatus 3B. The radio resource control layer processing unit 36 of the base station device 3A supplies resources for transmitting HARQ-ACK to the PDSCH of the downlink frequency band (cell, component carrier, carrier) managed by the base station device 3B to the base station device. Set to the uplink frequency band (cell, component carrier, carrier) managed in 3A.

Since the function of the wireless transmission / reception unit 30 is the same as that of the wireless transmission / reception unit 10, the description thereof will be omitted as appropriate. Further, the wireless transmission / reception unit 30 grasps the SS (Search space: search area) configured in the terminal device 1. The wireless transmission / reception unit 30 grasps the search area in the control resource set configured in the terminal device 1. The wireless transmission / reception unit 30 grasps the PDCCH candidate monitored by the terminal device 1 and grasps the search area. The wireless transmission / reception unit 30 grasps which control channel element each PDCCH candidate monitored by the terminal device 1 is composed of (the number of the control channel element in which the PDCCH candidate is composed is grasped). The wireless transmission / reception unit 30 includes an SS grasping unit, and the SS grasping unit grasps the SS configured in the terminal device 1. The SS grasping unit grasps one or more PDCCH candidates in the control resource set configured as the search space of the terminal device. The SS grasping unit grasps PDCCH candidates (the number of PDCCH candidates, the number of PDCCH candidates) configured in the search area of the control resource set of the terminal device 1.

The SS grasping unit grasps the configuration of the search area in the control resource set (the number of PDCCH candidates, the OFDM symbol of the PDCCH candidate, the Aggression level of the PDCCH candidate). The transmission unit of the wireless transmission / reception unit 30 transmits the PDCCH to the terminal device 1 using the PDCCH candidates in the search area of the control resource set.

In the SS grasping unit, one or more PDCCH candidates are configured in the search area of a certain slot in the first half of the slot (for example, the first OFDM symbol, or the first and second OFDM symbols, or the first and second OFDM symbols. And the third OFDM symbol) may be understood to be composed of the OFDM symbols. In the SS grasping unit, one or more PDCCH candidates are configured in the search area of a certain slot in the first half of the slot (for example, the first OFDM symbol, or the first and second OFDM symbols, or the first and second OFDM symbols. And the OFDM symbol of the third OFDM symbol), and one or more PDCCH candidates are the second half of the slot (eg, the eighth OFDM symbol, or the eighth and ninth OFDM symbols, or the eighth and ninth. And the 10th OFDM symbol) may be understood to be composed of the OFDM symbols. The SS grasping unit may grasp that each slot is a search area for different OFDM symbols, and three or more search areas are configured.

The receiving unit (also referred to as the receiving processing unit) of the base station device 3 receives HARQ-ACK. The reception processing unit of the base station apparatus 3 receives HARQ-ACK for the PDSCH. The reception processing unit of the base station device 3 (base station device 3A) receives HARQ-ACK in the uplink frequency band (cell, component carrier, carrier). The reception processing unit of the base station device 3A includes HARQ-ACK for the PDSCH of the downlink frequency band (cell, component carrier, carrier) managed by the base station device 3A, and the downlink frequency band managed by the base station device 3B. Receives HARQ-ACK for PDSCH of (cell, component carrier, carrier). The reception processing unit of the base station device 3A includes HARQ-ACK for the PDSCH of the downlink frequency band (cell, component carrier, carrier) managed by the base station device 3A, and the downlink frequency band managed by the base station device 3B. HARQ-ACK for PDSCH of (cell, component carrier, carrier) is received in the uplink frequency band (cell, component carrier, carrier) managed by the base station apparatus 3A. The reception processing unit of the base station device 3A receives HARQ-ACK for the PDSCH of the downlink frequency band (cell, component carrier, carrier) managed by the base station device 3A by the first method, and the base station device 3B receives the HARQ-ACK. The HARQ-ACK for the PDSCH of the managed downlink frequency band (cell, component carrier, carrier) is received by the second method.

Each part of the terminal device 1 with reference numerals 10 to 16 may be configured as a circuit. Each of the portions of the base station apparatus 3 with reference numerals 30 to 36 may be configured as a circuit.

The terminal device 1 transmits uplink control information (UCI) to the base station device 3. The terminal device 1 may multiplex the UCI to the PUCCH and transmit it. The terminal device 1 may multiplex the UCI to the PUSCH and transmit it. UCI uses downlink channel state information (Channel State Information: CSI), scheduling request indicating a PUSCH resource request (Scheduling Request: SR), and downlink data (Transport block, Medium Access PDU PDU Data It may include at least one of HARQ-ACK (Hybrid Automatic Repeat ACKnowledgement) for Shared Channel: DL-SCH, Physical Downlink Shared Channel: PDSCH.

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 decrypted, an ACK for the downlink data is generated. If the downlink data is not successfully decrypted, a NACK is generated for the downlink data. The HARQ-ACK may include at least the HARQ-ACK bits corresponding to one transport block. The HARQ-ACK bit may indicate ACK (ACKnowledgment) or NACK (Negative-ACKnowledgment) corresponding to one or more transport blocks. The HARQ-ACK may include at least a HARQ-ACK codebook containing one or more HARQ-ACK bits. The fact that the HARQ-ACK bit corresponds to one or more transport blocks may mean that the HARQ-ACK bit corresponds to a PDSCH containing the one or more transport blocks.

HARQ control for one transport block may be called a HARQ process. One HARQ process identifier may be given for each HARQ process. The DCI format contains a field indicating the HARQ process identifier.

NDI (New Data Indicator) is shown in DCI format for each HARQ process. For example, the NDI field is included in the DCI format (DL association) containing the PDSCH scheduling information. The NDI field is 1 bit. The terminal device 1 stores (stores) the value of NDI for each HARQ process. The base station device 3 stores (stores) the NDI value for each HARQ process for each terminal device 1. The terminal device 1 updates the stored NDI value using the detected DCI format NDI field. The base station apparatus 3 sets the updated NDI value or the non-updated NDI value in the NDI field of the DCI format and transmits the updated NDI value to the terminal apparatus 1. The terminal device 1 updates the value of the NDI stored by using the detected DCI format NDI field for the detected HARQ process corresponding to the value of the detected DCI format HARQ process identifier field.

The terminal device 1 determines whether the received transport block is a new transmission or a retransmission based on the value of the NDI field of the DCI format (DL assignment). The terminal device 1 compares the previously received NDI value to the transport block of a HARQ process, and if the detected DCI format NDI field value is toggled, the received transport block Judge that it is a new transmission. When the base station apparatus 3 transmits a transport block for new transmission in a certain HARQ process, the base station apparatus 3 toggles the value of the NDI stored for the HARQ process and transmits the toggled NDI to the terminal apparatus 1. When the base station apparatus 3 transmits a transport block for retransmission in a certain HARQ process, the base station apparatus 3 does not toggle the value of the NDI stored for the HARQ process, and transmits the non-toggled NDI to the terminal apparatus 1. Terminal 1 receives the detected DCI format NDI field value if it is not toggled (if it is the same) compared to the previously received NDI value for the transport block of a HARQ process. It is determined that the transport block is retransmitted. Here, toggling means switching to a different value.

The terminal device 1 displays HARQ-ACK information in the slot indicated by the value of the HARQ instruction field included in the DCI format 1_0 corresponding to PDSCH reception or the DCI format 1-11, and the HARQ-ACK codebook. ) May be reported to the base station apparatus 3. The terminal device 1 obtains HARQ-ACK information in the slot indicated by the value of the HARQ instruction field included in the DCI format 1_0 or the DCI format 1-11 corresponding to the PDSCH reception of the base station device 3A, and the HARQ-ACK codebook. (HARQ-ACK codebook) may be used to report to the base station apparatus 3A.

For DCI format 1_0, the value of the HARQ indicator field may be mapped to a set of slots (1,2,3,4,5,6,7,8). For DCI format 1-1-1, the value of the HARQ indicator field may be mapped to the set of slots given by the upper layer parameter dl-DataToUL-ACK. The number of slots indicated at least based on the value of the HARQ indicator 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 on which the PDSCH was received (or the slot containing the last OFDM symbol to which the PDSCH is mapped) and the slot on which HARQ-ACK is transmitted for the received PDSCH. be. For example, dl-DataToUL-ACK is a list of one, two, or three, four, five, six, seven, or eight timings. If dl-DataToUL-ACK is a list of timings, the HARQ indicator field is 0 bits. If dl-DataToUL-ACK is a list of two timings, the HARQ indicator field is 1 bit. If the dl-DataToUL-ACK is a list of 3 or 4 timings, the HARQ indicator field is 2 bits. If the dl-DataToUL-ACK is a list of 5, 6, or 7, or 8 timings, the HARQ indicator field is 3 bits. For example, dl-DataToUL-ACK consists of a list of timings with any value in the range 0-31. For example, dl-DataToUL-ACK consists of a list of timings with any value in the range 0-63.

The size of dl-DataToUL-ACK is defined as the number of elements contained 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, when the size of dl-DataToUL-ACK is 8 (L _para = 8), the index of dl-DataToUL-ACK is any of 1, 2, 3, 4, 5, 6, 7, or 8. The value. The index of dl-DataToUL-ACK may be given, indicated, or indicated by the value indicated by the HARQ indicator field.

The terminal device 1 may set the size of the HARQ-ACK codebook according to the size of the dl-DataToUL-ACK. For example, if the dl-DataToUL-ACK consists of eight elements, the size of the HARQ-ACK codebook is eight. For example, if dl-DataToUL-ACK consists of two elements, HARQ-ACK
The size of the codebook is 2. Each HARQ-ACK information constituting the HARQ-ACK codebook is HARQ-ACK information for PDSCH reception at each slot timing of dl-DataToUL-ACK. This type of HARQ-ACK codebook is also referred to as a Semi-static HARQ-ACK codebook.

An example of setting the HARQ instruction field will be described. For example, the dl-DataToUL-ACK consists of a list of eight timings 0, 7, 15, 23, 31, 39, 47, 55, and the HARQ indicator field consists of 3 bits. The HARQ instruction field "000" corresponds to the first 0 in the list of dl-DataToUL-ACK as the corresponding timing. That is, the HARQ instruction field "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 list of dl-DataToUL-ACK 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 indicator field "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 instruction field "110" corresponds to the seventh 47 in the list of dl-DataToUL-ACK as the corresponding timing. The HARQ instruction field "111" corresponds to the eighth 55 in the list of dl-DataToUL-ACK as the corresponding timing. When the received HARQ instruction 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 instruction field indicates "001", the terminal device 1 transmits the corresponding HARQ-ACK in the 7th slot from the received PDSCH slot. When the received HARQ instruction 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 instruction 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 instruction 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-AggressionFactor is given to the terminal device 1, the N _PDSCH ^repeat may be the value of the pdsch-AggressionFactor. When the upper layer parameter pdsch-AggressionFactor is not given to the terminal device 1, the 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 indicator field included in the DCI format corresponding to the PDSCH reception. Further, if the HARQ instruction field is not included in the DCI format, k may be given by the upper layer parameter dl-DataToUL-ACK.

If the terminal device 1 is configured to monitor the PDCCH containing DCI format 1_1 and is configured not to monitor the PDCCH containing DCI format 1-11, the HARQ-ACK timing value K1 is (1, 2, 3, It may be a part or all of 4, 5, 6, 7, 8). When the terminal device 1 is configured to monitor PDCCH including DCI format 1-11, 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 a plurality of opportunities for receiving one or more candidate PDSCHs to transmit the corresponding HARQ-ACK information on the PUCCH of a certain slot. The terminal device 1 determines that the plurality of slots of the slot timing K1 included in the dl-DataToUL-ACK are a 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, 6, 7, 8), the PUCCH in slot n receives PDSCH in slot n-1 and PDSCH in slot n-2. Receive, receive PDSCH in slot n-3, receive PDSCH in slot n-4, receive PDSCH in slot n-5, receive PDSCH in slot n-6, receive PDSCH in slot n-7, receive n-8 HARQ-ACK information for PDSCH reception of the slot of is transmitted. When the terminal device 1 actually receives the PDSCH in the slot corresponding to the candidate PDSCH reception, 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 candidate PDSCH reception. If PDSCH is not received in the slot to be used, NACK is set as HARQ-ACK information.

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

The terminal device 1 receives a slot for receiving PDCCH, a slot for transmitting HARQ-ACK information based on the value of the HARQ instruction field included in the received DCI format, and a plurality of candidate PDSCHs corresponding to the HARQ-ACK information. Determine the set of slots. For example, when 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 that the HARQ-ACK information is transmitted in the 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 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 in (6-4)), HARQ-ACK information for PDSCH reception in slot (m + (7-4)), and HARQ- for PDSCH reception in slot (m + (8-4)). Judge that it is ACK information.

The dl-DataToUL-ACK can be configured not only as a value indicating the number of slots as the timing of HARQ-ACK, but also as a value (information) indicating that HARQ-ACK is held. When the terminal device 1 receives a HARQ instruction field indicating a value indicating that HARQ-ACK is held in the PDCCH, the terminal device 1 holds the HARQ-ACK (HARQ-ACK information) for the PDSCH scheduled in the PDCCH, and holds the HARQ-ACK. Waits for the transmission of ACK (HARQ-ACK information).

In the above description, the Semi-static HARQ-ACK codebook has been described as the type of the HARQ-ACK codebook, but a different type of HARQ-ACK codebook may be used. A type of HARQ-ACK codebook called Dynamic HARQ-ACK codebook will be described.

An HARQ-ACK codebook corresponding to a PDSCH group is one or more HARQ-corresponding to any one or more transport blocks contained in any one or more PDSCHs contained in the PDSCH group. Given based on the ACK bit. The HARQ-ACK codebook is given based on at least a set of PDCCH monitoring opportunities (Monitoringoccasion for PDCCH), some or all of the values in the counter DAI field. The HARQ-ACK codebook may be given further based on the value of the UL DAI field. , HARQ-ACK codebook may be given further based on the value of the DAI field. The HARQ-ACK codebook may be given further based on the value of the total DAI field.

The HARQ-ACK codebook size of the Dynamic HARQ-ACK codebook is based on the DCI format field. The size of the HARQ-ACK codebook may be set based on the value of the last received DCI format counter DAI field. The counter DAI field indicates the cumulative number of PDSCHs or transport blocks scheduled to receive the corresponding DCI format. The size of the HARQ-ACK codebook may be set based on the value of the total DAI field in DCI format. The total DAI field indicates the total number of PDSCHs or transport blocks scheduled before the transmission of the HARQ-ACK codebook.

The terminal device 1 sets the PDCCH monitoring opportunity set for the HARQ-ACK information transmitted in the PUCCH arranged in the slot (slot # n) of the index n as the value of the timing K1 and the value of the slot offset K0. It may be decided based on at least a part or all of. The set of PDCCH monitoring opportunities for HARQ-ACK information transmitted in the PUCCH placed in the slot of index n is also the set of PDCCH monitoring opportunities (monitoring occupation for PDCCH for slot # n) for slot n. It is called. Here, the set of monitoring opportunities for PDCCH includes monitoring opportunities for M PDCCH. For example, slot offset K0 may be indicated at least based on the value of the time domain resource allocation field contained in the downlink DCI format. The slot offset K0 is from the slot containing the last OFDM symbol in which the PDCCH containing the DCI format including the time region resource allocation field indicating the slot offset K0 is placed to the first OFDM symbol of the PDSCH scheduled by the DCI format. It is a value indicating the number of slots (slot difference) of.

If the DCI format detected in the monitoring opportunity of any search region set corresponding to the monitoring opportunity of a PDCCH triggers the transmission of HARQ-ACK information in slot n (including the triggering information), the terminal device. 1 may determine the monitoring opportunity of the PDCCH as the PDCCH monitoring opportunity for slot n. Further, if the DCI format detected in the monitoring opportunity of the search area set corresponding to the monitoring opportunity of a certain PDCCH does not trigger the transmission of HARQ-ACK information in slot n (does not include the triggering information), the terminal device. 1 does not have to determine the monitoring opportunity of the PDCCH as the PDCCH monitoring opportunity for slot n. Further, when the DCI format is not detected in the monitoring opportunity of the search area set corresponding to the monitoring opportunity of a certain PDCCH, the terminal device 1 does not have to determine the monitoring opportunity of the PDCCH as the PDCCH monitoring opportunity for the slot n. ..

The PUCCH resource used to transmit HARQ-ACK information in slot n is the PUCCH resource included in the last DCI format of the one or more DCI formats detected in the set of PDCCH monitoring opportunities for slot n. It may be specified at least based on the indicated field. Here, each of the one or more DCI formats triggers transmission of HARQ-ACK information in slot n. The last DCI format may be the DCI format corresponding to the last index (largest index) of the DCI formats detected in the set of PDCCH monitoring opportunities for the slot n. The DCI format index in the set of PDCCH monitoring opportunities for the slot n is given in ascending order to the index of the serving cell in which the DCI format is detected, and then the PDCCH monitoring opportunity in which the DCI format is detected. Given in ascending order to the index of. The PDCCH monitoring opportunity index is given in ascending order on the time axis.

The counter DAI (Counter DAI) is the cumulative number (or cumulative) of PDCCH detected up to the monitoring opportunity of the PDCCH in the serving cell for the monitoring opportunity of the PDCCH in the serving cell in the monitoring opportunity of M PDCCH. It may be at least a value related to the number). The counter DAI may also be referred to as C-DAI. The C-DAI corresponding to the PDSCH may be indicated by a field contained in the DCI format used for scheduling the PDSCH. The total DAI may indicate the cumulative number (or at least a value related to the cumulative number) of PDCCH detected by the monitoring opportunity m of PDCCH in the monitoring opportunity of M PDCCH. The total DAI may be referred to as a T-DAI (Total Downlink Assignment Index).

Semi-static HARQ-ACK codebook (type 1 HARQ-ACK codebook) or Dynamic HARQ-ACK codebook (type 2 HARQ-ACK codebook) is instructed (triggered, requested) to be transmitted based on DL assert. ACK codebook. The DCI format including the HARQ indicator field is DL association (Downlink association). DL association is a DCI format used for PDSCH scheduling. DL association is a DCI format used for PDSCH allocation. The Semi-static HARQ-ACK codebook is constructed based on the dl-DataToUL-ACK and the HARQ instruction field. The size of the Semi-static HARQ-ACK codebook is based on the size included in the dl-DataToUL-ACK. The timing of the slots included in the Semi-static HARQ-ACK codebook or the Dynamic HARQ-ACK codebook is based on the value of the HARQ instruction field and the slot in which the DCI including the HARQ instruction field is received.

Dynamic HARQ-ACK codebook or Semi-static HARQ-ACK codebook is the first method of transmitting and receiving HARQ-ACK. The first method is used for transmitting and receiving HARQ-ACK to the PDSCH of the downlink frequency band (cell, component carrier, carrier) managed by the base station apparatus 3A. A second method is used for transmitting and receiving HARQ-ACK to the PDSCH of the downlink frequency band (cell, component carrier, carrier) managed by the base station apparatus 3B.

The HARQ-ACK codebook of the second method includes HARQ-ACK information for a plurality or all HARQ processes. For example, HARQ process means HARQ process used for PDSCH. For example, all HARQ processes mean all of the HARQ processes that can be used in at least one Serving cell (downlink cell managed in the base station apparatus 3B). For example, the number of HARQ processes that can be used in one Serving cell is 16. For example, a plurality of HARQ processes means a plurality of HARQ processes configured by RRC signing. For example, the number of a plurality of HARQ processes is eight. For example, the number of a plurality of HARQ processes is 10.

An example of HARQ-ACK codebook of the second method will be described. 8 HARQ processes (HARQ process 0, HARQ process 1, HARQ process 2, HARQ process 3, HARQ process 4, HARQ process 5, HARQ process 6, HARQ ACK 7) Explanation for HARQ process .. When one transport block is transmitted / received for each HARQ process in the downlink cell of the base station apparatus 3B, 1-bit HARQ-ACK is used for each HARQ process. 1-bit HARQ-ACK for HARQ process 0, 1-bit HARQ-ACK for HARQ process 1, 1-bit HARQ-ACK for HARQ process 2, 1-bit HARQ-ACK for HARQ process 3, and 1 bit for HARQ process 4. HARQ-ACK, 1-bit HARQ-ACK for HARQ process 5, 1-bit HARQ-ACK for HARQ process 6, and 1-bit HARQ-ACK for HARQ process 7 make up one HARQ-ACK codebook with a total of 8 bits. Will be done. When two transport blocks are transmitted and received for each HARQ process in the downlink cell of the base station device 3B, 2-bit HARQ-ACK is used for each HARQ process. 2-bit HARQ-ACK for HARQ process 0, 2-bit HARQ-ACK for HARQ process 1, 2-bit HARQ-ACK for HARQ process 2, 2-bit HARQ-ACK for HARQ process 3, and 2-bit for HARQ process 4. HARQ-ACK, 2-bit HARQ-ACK for HARQ process 5, 2-bit HARQ-ACK for HARQ process 6, and 2-bit HARQ-ACK for HARQ process 7 make up one HARQ-ACK codebook with a total of 16 bits. Will be done. The configured HARQ-ACK codebook is transmitted from the terminal device 1 in the uplink cell of the base station device 3A.

The first method can be said to be a method in which the time resource (slot) used for transmitting HARQ-ACK is dynamically notified by DCI format. The second method can be said to be a method in which the time resource (slot) used for transmitting HARQ-ACK is quasi-statically notified by RRC signing. The first method can be said to be a method in which the time resource (slot) used for transmitting HARQ-ACK is aperiodic. The second method can be said to be a method in which the time resource (slot) used for transmitting HARQ-ACK is periodic. In the second method, the time resource (slot) used for transmitting HARQ-ACK may be static.

The first method can be said to be a method in which the frequency resource (physical channel) used for the transmission of HARQ-ACK is dynamically notified by DCI format. The second method can be said to be a method in which the frequency resource (physical channel) used for the transmission of HARQ-ACK is quasi-statically notified by RRC signing.

The first method can be said to be a HARQ-ACK codebook in which the relationship between the slot to which the HARQ-ACK codebook is transmitted and received and the slot of the PDSCH corresponding to the HARQ-ACK included in the HARQ-ACK codebook is defined. The HARQ process used for the PDSCH corresponding to the HARQ-ACK included in the HARQ-ACK codebook of the first method is not limited in advance, and is set by the scheduling of the base station apparatus 3. The HARQ-ACK codebook of the second method can be said to be a HARQ-ACK codebook in which the HARQ process of the PDSCH corresponding to the HARQ-ACK included in the HARQ-ACK codebook is defined.

For example, as the frequency resource used for transmitting and receiving the HARQ-ACK codebook of the second method, the frequency resource for every 8 slots is notified from the base station device 3 to the terminal device 1 by RRC signing. For example, the period and the offset are notified from the base station device 3 to the terminal device 1. As the cycle, for example, 8 is notified. As the offset, any of 0, 1, 2, 3, 4, 5, 6, and 7 is notified. Here, the offset indicates how much the slot is deviated from the slot at a certain reference timing, and the resource is allocated periodically. Here, the period may be equal to the total number of HARQ processes used in the downlink cell. For example, when the total number of HARQ processes used in the downlink cell is eight, the period of the frequency resource used for transmitting and receiving the HARQ-ACK codebook of the second method may be eight. For example, when the total number of HARQ processes used in the downlink cell is 16, the period of the frequency resource used for transmitting and receiving the HARQ-ACK codebook of the second method may be 16. Here, the offset candidate may be equal to the period value. Here, the period may be equal to the total number of HARQ processes used in the plurality of downlink cells.

For example, the terminal device 1 transmits the HARQ-ACK codebook of the second method in a cycle of slots 0 to 8. For example, the base station apparatus 3A receives the HARQ-ACK codebook of the second method in a cycle of slots 0 to 8. The terminal device 1 transmits a HARQ-ACK codebook composed of eight HARQ-ACKs to eight HARQ processes in slot 0. The base station apparatus 3A receives the HARQ-ACK codebook composed of eight HARQ-ACKs for the eight HARQ processes in slot 0. Next, the terminal device 1 transmits a HARQ-ACK codebook composed of eight HARQ-ACKs to eight HARQ processes in the slot 8. The base station apparatus 3A receives the HARQ-ACK codebook composed of eight HARQ-ACKs for the eight HARQ processes in the slot 8. Next, the terminal device 1 transmits a HARQ-ACK codebook composed of eight HARQ-ACKs to eight HARQ processes in the slot 16. The base station apparatus 3A receives the HARQ-ACK codebook composed of eight HARQ-ACKs for the eight HARQ processes in the slot 16. The terminal device 1 transmits a HARQ-ACK codebook including HARQ-ACK for the PDSCH of the downlink cell of the base station device 3B in the uplink cell of the base station device 3A. The base station apparatus 3A receives and receives a HARQ-ACK codebook including HARQ-ACK for the PDSCH received by the terminal apparatus 1 in the downlink cell of the base station apparatus 3B in the uplink cell managed by the base station apparatus 3A. Notify (transfer) the completed HARQ-ACK to the base station device 3B.

The terminal device 1 resets (flashes) the held (stored) HARQ-ACK for each HARQ process every time the HARQ-ACK codebook is transmitted. NACK is set as the default value for the reset (flushed) HARQ-ACK. When the HARQ-ACK for the HARQ process used for transmitting the PDSCH is ACK, the base station device 3B recognizes that the PDSCH has been properly received by the terminal device 1 without any data error, and does not retransmit the data. When the HARQ-ACK for the HARQ process used for transmitting the PDSCH is NACK, the base station device 3B recognizes that the PDSCH was not properly received in the terminal device 1 without any data error, and retransmits the data. The base station apparatus 3B ignores HARQ-ACK for the HARQ process that is not used for PDSCH transmission.

When a Dynamic HARQ-ACK codebook (type 2 HARQ-ACK codebook) is used as the HARQ-ACK codebook of the first method, the UL grant includes the UL DAI field. The UL grant may include a UL DAI field for each PDSCH group. The number of PDSCH groups used may be configured from base station device 3 to terminal device 1 using RRC signaling. The base station apparatus 3 transmits the UL grant including the UL DAI field for each PDSCH group to the terminal apparatus 1, and receives the PUSCH including the HARQ-ACK information for each PDSCH group. The terminal device 1 receives the UL grant including the UL DAI field for each PDSCH group from the base station device 3, and transmits the PUSCH including the HARQ-ACK information for each PDSCH group. The terminal device 1 receives the UL grant including the UL DAI field for each PDSCH group from the base station device 3, and transmits the PUSCH including the HARQ-ACK information of all the preconfigured PDSCH groups.

For example, when there are two PDSCH groups, PDSCH group 1 and PDSCH group 2, the UL DAI field for PDSCH group 1 and the UL DAI field for PDSCH group 2 are included in the UL grant. The terminal device 1 determines the HARQ-ACK information for the PDSCH group 1 using the UL DAI field for the PDSCH group 1, and determines the HARQ-ACK information for the PDSCH group 2 using the UL DAI field for the PDSCH group 2. The UL DAI field indicates the number of PDSCHs that include the HARQ-ACK corresponding to the HARQ-ACK codebook transmitted on the PUSCH. When the number of received PDSCHs is smaller than the number of PDSCHs indicated by the UL DAI field, the terminal device 1 determines that there is a PDCCH that has missed detection, and sets a bit indicating NACK in the corresponding HARQ-ACK bit. .. The terminal device 1 transmits HARQ-ACK information for PDSCH group 1 and HARQ-ACK information for PDSCH group 2 by PUSCH. The base station apparatus 3 determines from the HARQ-ACK information for the PDSCH group 1 received by the PUSCH whether or not a PDCCH detection error in the PDSCH group 1 has occurred in the terminal apparatus 1, and determines whether the HARQ- From the ACK information, it is determined whether or not a PDCCH detection error in the PDSCH group 2 has occurred in the terminal device 1. In this way, by including the UL DAI field for each PDSCH group in the UL grant, the terminal device 1 determines the PDCCH detection error for each PDSCH group, and the base station device 3 appropriately determines the determination result in the terminal device 1. Can be recognized.

The UL grant may contain one UL DAI field for all PDSCH groups. The base station device 3 transmits a UL grant including a UL DAI field for all PDSCH groups to the terminal device 1, and receives a PUSCH including HARQ-ACK information of all PDSCH groups. The terminal device 1 receives the UL grant including the UL DAI field for all PDSCH groups from the base station device 3, and transmits the PUSCH including the HARQ-ACK information of all PDSCH groups. The UL DAI field for all PDSCH groups may indicate the size of the HARQ-ACK codebook containing the HARQ-ACK information for all PDSCH groups. The UL DAI field for all PDSCH groups may indicate the number of HARQ-ACKs of all PDSCH groups included in the HARQ-ACK codebook transmitted by PUSCH. The UL DAI field for all PDSCH groups may indicate the number of PDSCHs in all PDSCH groups in which the HARQ-ACK codebook transmitted on the PUSCH includes the corresponding HARQ-ACK.

For example, when there are two PDSCH groups, PDSCH group 1 and PDSCH group 2, the UL DAI field for the PDSCH group that combines the PDSCH group 1 and the PDSCH group 2 is included in the UL grant. The terminal device 1 determines the HARQ-ACK information for the PDSCH group 1 and the PDSCH group 2 using the UL DAI field. The UL DAI field indicates the number of PDSCHs in all PDSCH groups, including the HARQ-ACK corresponding to the HARQ-ACK codebook transmitted on the PUSCH. When the number of received PDSCHs is smaller than the number of PDSCHs indicated by the UL DAI field, the terminal device 1 determines that there is a PDCCH that has missed detection, and sets a bit indicating NACK in the corresponding HARQ-ACK bit. .. The terminal device 1 transmits HARQ-ACK information for PDSCH group 1 and PDSCH group 2 by PUSCH.

FIG. 10 is a diagram showing an example of a search area set in the terminal device 1 according to one aspect of the present embodiment. In FIG. 10, 14 OFDM symbols (l = 0, l = 1, l = 2, l = 3, l = 4, l = 5, l = 6, l = 7, l = 8, l) in one slot. = 9, l = 10, l = 11, l = 12, l = 13). In FIG. 10, the 1st (l = 0) to 7th (l = 6) OFDM symbols are the OFDM symbols of the first half of the slot, and the 8th (l = 7) to 14th (l = 13) OFDM symbols. The symbol is the OFDM symbol of the first half of the slot. In FIG. 10, the first search area is set to the first (l = 0) OFDM symbol of the slot.

FIG. 11 is a diagram showing an example of a search area set in the terminal device 1 according to one aspect of the present embodiment. In FIG. 11, 14 OFDM symbols (l = 0, l = 1, l = 2, l = 3, l = 4, l = 5, l = 6, l = 7, l = 8, l) in one slot. = 9, l = 10, l = 11, l = 12, l = 13). In FIG. 11, the 1st (l = 0) to 7th (l = 6) OFDM symbols are the OFDM symbols of the first half of the slot, and the 8th (l = 7) to 14th (l = 13) OFDM symbols. The symbol is the OFDM symbol of the first half of the slot. In FIG. 11, the second search area is set to the first (l = 0) OFDM symbol of the slot and the eighth (l = 7) OFDM symbol of the slot. In this case, one PDCCH candidate is composed of one or more CCEs of the first (l = 0) OFDM symbol of the slot or one or more CCEs of the eighth (l = 7) OFDM symbol of the slot. .. The search area set in the first (l = 0) OFDM symbol of the slot and the search area set in the eighth (l = 7) OFDM symbol of the slot are logically different search areas. May be good. FIG. 11 is a search area set including a search area set in the first (l = 0) OFDM symbol of the slot and a search area set in the eighth (l = 7) OFDM symbol of the slot. You may.

FIG. 12 is a diagram showing an example of a search area set in the terminal device 1 according to one aspect of the present embodiment. In FIG. 12, 14 OFDM symbols (l = 0, l = 1, l = 2, l = 3, l = 4, l = 5, l = 6, l = 7, l = 8, l) in one slot. = 9, l = 10, l = 11, l = 12, l = 13). In FIG. 12, the 1st (l = 0) to 7th (l = 6) OFDM symbols are the OFDM symbols of the first half of the slot, and the 8th (l = 7) to 14th (l = 13) OFDM symbols. The symbol is the OFDM symbol in the first half of the slot. In FIG. 12, the third search region is set to the first (l = 0) to second (l = 1) OFDM symbols of the slot. In this case, one PDCCH candidate is composed of one or more CCEs of the first (l = 0) and second (l = 1) OFDM symbols of the slot.

FIG. 13 is a diagram showing an example of a search area set in the terminal device 1 according to one aspect of the present embodiment. In FIG. 13, 14 OFDM symbols (l = 0, l = 1, l = 2, l = 3, l = 4, l = 5, l = 6, l = 7, l = 8, l) in one slot. = 9, l = 10, l = 11, l = 12, l = 13). In FIG. 13, the 1st (l = 0) to 7th (l = 6) OFDM symbols are the OFDM symbols of the first half of the slot, and the 8th (l = 7) to 14th (l = 13) OFDM symbols. The symbol is the OFDM symbol of the first half of the slot. In FIG. 13, the fourth search area is the first (l = 0) OFDM symbol of the slot, the fourth (l = 3) OFDM symbol of the slot, and the eighth (l = 7) OFDM symbol of the slot. Is set to the 12th (l = 11) OFDM symbol of the slot. In this case, one PDCCH candidate is one or more CCEs of the first (l = 0) OFDM symbol of the slot, or one or more CCEs of the fourth (l = 3) OFDM symbol of the slot, or the slot. It consists of one or more CCEs of the 8th (l = 7) OFDM symbol or one or more CCEs of the 12th (l = 11) OFDM symbol of the slot.

As described above, one aspect of the present invention can appropriately exchange HARQ-ACK between the terminal device 1 and the base station device 3. As a result, the base station apparatus 3 can appropriately control the retransmission of data. Efficient communication is achieved by realizing appropriate retransmission control.

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 aspects of the present invention have taken the following measures. That is, the first aspect of the present invention is a terminal device including a processor and a memory for storing a computer program code, which provides periodic resources in an uplink cell managed by the first base station device. An operation including setting and transmitting a HARQ-ACK codebook including HARQ-ACK to the PDSCH of the downlink cell managed by the second base station apparatus with the periodic resource is executed.

(2) Further, the HARQ-ACK codebook is composed of a plurality of HARQ-ACKs, and each of the HARQ-ACKs corresponds to a different HARQ process.

(3) Further, when the HARQ-ACK codebook is transmitted, the HARQ-ACK for each stored HARQ process is reset.

(4) Further, the uplink cell managed by the second base station device is not configured for the terminal device.

(5) A second aspect of the present invention is a base station device including a processor and a memory for storing a computer program code, and sets periodic resources in an uplink cell with respect to the terminal device. That, the HARQ-ACK codebook including the HARQ-ACK for the PDSCH of the downlink cell managed by the different base station device is received from the terminal device with the periodic resource, and the received HARQ-ACK is received from the different base station. Perform actions, including transferring to the device.

(6) Further, the HARQ-ACK codebook is composed of a plurality of HARQ-ACKs, and each of the HARQ-ACKs corresponds to a different HARQ process.

(7) A third aspect of the present invention is a communication method used for a terminal device, in which a step of setting a periodic resource in an uplink cell managed by the first base station device and a second step. It includes a step of transmitting a HARQ-ACK codebook including HARQ-ACK for PDSCH of a downlink cell managed by a base station apparatus with the periodic resource.

(8) Further, the HARQ-ACK codebook is composed of a plurality of HARQ-ACKs, and each of the HARQ-ACKs corresponds to a different HARQ process.

(9) Further, when the HARQ-ACK codebook is transmitted, the step of resetting the HARQ-ACK for each stored HARQ process is included.

(10) Further, the uplink cell managed by the second base station device is not configured for the terminal device.

(11) A fourth aspect of the present invention is a communication method used for a base station device, in which a step of setting a periodic resource in an uplink cell for a terminal device and a step managed by a different base station device are managed. A step of receiving a HARQ-ACK codebook including HARQ-ACK for PDSCH of a downlink cell from the terminal device with the periodic resource, a step of transferring the received HARQ-ACK to the different base station device, and a step of transferring the received HARQ-ACK to the different base station device. including.

(12) Further, the HARQ-ACK codebook is composed of a plurality of HARQ-ACKs, and each of the HARQ-ACKs corresponds to a different HARQ process.

The program operating on the base station device 3 and the terminal device 1 according to one aspect of the present invention controls a CPU (Central Processing Unit) and the like so as to realize the functions of the above embodiment related to one aspect of the present invention. It may be a program (a program that makes a computer function). Then, the information handled by these devices is temporarily stored in RAM (Random Access Memory) at the time of processing, and then stored in various ROMs such as Flash ROM (Read Only Memory) and HDD (Hard Disk Drive). The CPU reads, corrects, and writes as necessary.

Note that 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 this control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer system and executed.

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

Furthermore, a "computer-readable recording medium" is a medium that dynamically holds a program for a short period of time, such as a communication line when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In that case, a program may be held for a certain period of time, such as a volatile memory inside a computer system serving as a server or a client. Further, the above-mentioned program may be a program for realizing a part of the above-mentioned 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 consist of 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 such that the terminal device 1 performs the operations and processes described in the above-described embodiment by using a processor. The base station apparatus 3 may consist of at least one processor and at least one memory including computer program instructions (computer programs). The memory and the computer program instruction (computer program) may be configured such that the base station apparatus 3 performs the operations and processes described in the above-described embodiment by using a processor.

Further, the base station device 3 in the above-described embodiment can also be realized as an aggregate (device group) composed of a plurality of devices. Each of the devices constituting the device group may include a part or all of each function or each function block of the base station device 3 according to the above-described embodiment. As the device group, it suffices to have each function or each function 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.

Further, the base station device 3 in the above-described embodiment may be EUTRAN (Evolved Universal Terrestrial Radio Access Network) and / or NG-RAN (NextGen RAN, NR RAN). Further, the base station apparatus 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, a part or all of the terminal device 1 and the base station device 3 in the above-described embodiment may be realized as an LSI which is typically an integrated circuit, or may be realized as a chipset. Each functional block of the terminal device 1 and the base station device 3 may be individually chipped, or a part or all of them may be integrated into a chip. Further, the method of making an integrated circuit is not limited to the LSI, and may be realized by a dedicated circuit or a general-purpose processor. Further, when an integrated circuit technology that replaces an LSI appears due to advances in semiconductor technology, it is also possible to use an integrated circuit based on this technology.

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, and the present invention is not limited to this, and is a stationary or non-movable electronic device installed indoors or outdoors. For example, it can be applied to terminal devices or communication devices such as AV equipment, kitchen equipment, cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other living equipment.

As described above, the embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and includes design changes and the like within a range that does not deviate from the gist of the present invention. In addition, one aspect of the present invention can be variously modified within the scope of the claims, and the technical aspects of the present invention can also be obtained by appropriately combining the technical means disclosed in the different embodiments. Included in the range. In addition, the elements described in each of the above embodiments include a configuration in which elements having the same effect are replaced with each other.

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

1 (1A, 1B, 1C) Terminal equipment 3 Base station equipment 10, 30 Wireless transmission / reception unit 11, 31 Antenna unit 12, 32 RF unit 13, 33 Baseband unit 14, 34 Upper layer Processing unit 15, 35 Medium access control layer Processing unit 16, 36 Radio resource control layer processing unit

Claims (12)

1. A terminal device including a processor and a memory for storing a computer program code, in which a periodic resource is set in an uplink cell managed by the first base station device, and a second base station device is used. A terminal device that executes an operation including transmitting a HARQ-ACK codebook including HARQ-ACK to a PDSCH of a downlink cell to be managed by the periodic resource.
2. The terminal device according to claim 1, wherein the HARQ-ACK codebook is composed of a plurality of HARQ-ACKs, and each of the HARQ-ACKs corresponds to a different HARQ process.
3. The terminal device according to claim 2, wherein when the HARQ-ACK codebook is transmitted, the HARQ-ACK is reset for each stored HARQ process.
4. The terminal device according to claim 1, wherein the uplink cell managed by the second base station device is not configured for the terminal device.
5. A base station device including a processor and a memory for storing computer program code, in which periodic resources are set in the uplink cell for the terminal device, and a downlink managed by a different base station device. An operation including receiving a HARQ-ACK codebook including HARQ-ACK for the PDSCH of a cell from the terminal device with the periodic resource and transferring the received HARQ-ACK to the different base station device is executed. Base station equipment.
6. The base station apparatus according to claim 5, wherein the HARQ-ACK codebook is composed of a plurality of HARQ-ACKs, and each of the HARQ-ACKs corresponds to a different HARQ process.
7. A communication method used in a terminal device, in which a step of setting a periodic resource in an uplink cell managed by the first base station device and a PDSCH of a downlink cell managed by the second base station device are used. A communication method including a step of transmitting a HARQ-ACK codebook including HARQ-ACK with the periodic resource.
8. The communication method according to claim 7, wherein the HARQ-ACK codebook is composed of a plurality of HARQ-ACKs, and each of the HARQ-ACKs corresponds to a different HARQ process.
9. The communication method according to claim 7, further comprising a step of resetting the HARQ-ACK for each stored HARQ process when the HARQ-ACK codebook is transmitted.
10. The communication method according to claim 7, wherein the uplink cell managed by the second base station device is not configured for the terminal device.
11. A communication method used for a base station device, in which a step of setting a periodic resource in an uplink cell for a terminal device and HARQ-ACK for a PDSCH of a downlink cell managed by a different base station device are performed. A communication method including a step of receiving a HARQ-ACK codebook including from the terminal device with the periodic resource, and a step of transferring the received HARQ-ACK to the different base station device.
12. The communication method according to claim 11, wherein the HARQ-ACK codebook is composed of a plurality of HARQ-ACKs, and each of the HARQ-ACKs corresponds to a different HARQ process.

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