WO2022196611A1 - Équipement terminal, dispositif de station de base et procédé de communication - Google Patents

Équipement terminal, dispositif de station de base et procédé de communication Download PDF

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Publication number
WO2022196611A1
WO2022196611A1 PCT/JP2022/011214 JP2022011214W WO2022196611A1 WO 2022196611 A1 WO2022196611 A1 WO 2022196611A1 JP 2022011214 W JP2022011214 W JP 2022011214W WO 2022196611 A1 WO2022196611 A1 WO 2022196611A1
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WIPO (PCT)
Prior art keywords
pdcch candidates
slot
upper limit
pdcch
terminal device
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PCT/JP2022/011214
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English (en)
Japanese (ja)
Inventor
大一郎 中嶋
友樹 吉村
会発 林
翔一 鈴木
智造 野上
渉 大内
崇久 福井
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シャープ株式会社
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Priority to JP2023507083A priority Critical patent/JPWO2022196611A1/ja
Publication of WO2022196611A1 publication Critical patent/WO2022196611A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a terminal device, base station device and communication method.
  • This application claims priority to Japanese Patent Application No. 2021-42015 filed in Japan on March 16, 2021, the contents of which are incorporated herein.
  • LTE Long Term Evolution
  • EUTRA Evolved Universal Terrestrial Radio Access
  • 3GPP 3rd Generation Partnership Project
  • a base station device is also called an eNodeB (evolved NodeB)
  • a terminal device is also called a UE (User Equipment).
  • LTE is a cellular communication system in which a plurality of areas covered by base station devices are arranged in a cell. A single base station device may manage multiple serving cells.
  • NR New Radio
  • eMBB enhanced Mobile Broadband
  • mMTC massive Machine Type Communication
  • URLLC Ultra Reliable and Low Latency Communication
  • Non-Patent Document 1 consideration is being given to supporting NR in the frequency band from 52.6 GHz to 71 GHz.
  • the introduction of subcarrier spacings of 480 kHz and 960 kHz is being considered.
  • PDCCH Physical Downlink Control Channel
  • One aspect of the present invention provides a terminal device, a base station device, a communication method, and a communication method that perform efficient communication.
  • a first aspect of the present invention is a terminal device comprising a processor and a memory storing computer program code, in which a configuration of a search region including at least the number of PDCCH candidates for each period, offset, and aggregation level receiving RRC signaling indicating configurations of a plurality of search areas; configuring PDCCH candidates for each slot based on the RRC signaling indicating configurations of a plurality of search areas; adjusting the number of PDCCH candidates monitored in each slot using an upper bound, wherein if the number of PDCCH candidates configured for a slot exceeds the first upper bound, for that slot dropping at least some of the PDCCH candidates configured for the slot to set the number of PDCCH candidates monitored in the slot, and the number of PDCCH candidates configured for the slot does not exceed the first upper limit If so, do not drop the PDCCH candidates configured for that slot, set the number of PDCCH candidates monitored in that slot, and use the second
  • the PDCCH candidates whose number is adjusted based on the first upper limit are PDCCH candidates using a DCI format for single-slot scheduling, and the number is adjusted based on the second upper limit
  • the PDCCH candidates used are the PDCCH candidates using the DCI format for single-slot scheduling and the PDCCH candidates using the DCI format for multi-slot scheduling.
  • a second aspect of the present invention is a base station apparatus comprising a processor and a memory storing computer program code, wherein the search area includes at least the number of PDCCH candidates for each period, offset, and aggregation level.
  • the number does not exceed the first upper limit, do not drop the PDCCH candidates configured for that slot, and know the number of PDCCH candidates monitored in that slot; Using the upper limit value to determine the number of PDCCH candidates monitored in multiple slots, wherein the total number of PDCCH candidates determined based on the first upper limit value for multiple slots is equal to the first If the upper limit of two is exceeded, drop at least a portion of the PDCCH candidates identified for at least one slot, determine the number of PDCCH candidates monitored in multiple slots, and determine the number of PDCCH candidates monitored in multiple slots, and If the total number of PDCCH candidates configured based on one upper limit value does not exceed the second upper limit value, do not drop the PDCCH candidates identified based on the first upper limit value, and add to multiple slots determining the number of PDCCH candidates determined based on the first upper bound.
  • the PDCCH candidates whose number is grasped based on the first upper limit value are PDCCH candidates using the DCI format for single-slot scheduling, and the number is grasped based on the second upper limit value.
  • the PDCCH candidates used are the PDCCH candidates using the DCI format for single-slot scheduling and the PDCCH candidates using the DCI format for multi-slot scheduling.
  • a third aspect of the present invention is a communication method used in a terminal device, the configuration of a search region including at least the number of PDCCH candidates for each period, offset, and aggregation level, wherein a plurality of the search receiving RRC signaling indicating a configuration of a region; configuring PDCCH candidates for each slot based on said RRC signaling indicating a configuration of a plurality of said search regions; using a first upper bound, adjusting the number of PDCCH candidates monitored in each slot, wherein if the number of PDCCH candidates configured for the slot exceeds the first upper limit, the PDCCH candidates configured for that slot; to set the number of PDCCH candidates monitored in that slot, and if the number of PDCCH candidates configured for the slot does not exceed the first upper limit, for that slot setting the number of PDCCH candidates to be monitored in the slot without dropping PDCCH candidates configured in multiple slots; and adjusting the number of PDCCH candidates to be monitored in multiple slots using a second upper bound.
  • PDCCH candidates adjusted for at least one slot if the sum of the number of PDCCH candidates adjusted based on the first upper limit for multiple slots exceeds the second upper limit to set the number of PDCCH candidates monitored in multiple slots, and the sum of the number of PDCCH candidates set based on the first upper limit value for multiple slots equals the second If the upper limit of is not exceeded, do not drop the PDCCH candidates adjusted based on the first upper limit, and set the number of PDCCH candidates adjusted based on the first upper limit for multiple slots and
  • the PDCCH candidates whose number is adjusted based on the first upper limit are PDCCH candidates using a DCI format for single-slot scheduling, and the number is adjusted based on the second upper limit
  • the PDCCH candidates used are the PDCCH candidates using the DCI format for single-slot scheduling and the PDCCH candidates using the DCI format for multi-slot scheduling.
  • a fourth aspect of the present invention is a communication method used in a base station apparatus, the configuration of a search region including at least the number of PDCCH candidates for each period, offset, and aggregation level, transmitting RRC signaling indicating a configuration of a search region; configuring PDCCH candidates for each slot for a terminal device based on said RRC signaling indicating a plurality of said search region configurations; and said terminal device.
  • the PDCCH candidates whose number is grasped based on the first upper limit are PDCCH candidates using the DCI format for single-slot scheduling, and the number is grasped based on the second upper limit.
  • the PDCCH candidates used are the PDCCH candidates using the DCI format for single-slot scheduling and the PDCCH candidates using the DCI format for multi-slot scheduling.
  • the present invention it is possible to realize efficient communication between the terminal device and the base station device while suppressing the processing load on the terminal device.
  • FIG. 1 is a conceptual diagram of a wireless communication system according to one aspect of the present embodiment
  • FIG. 7 is an example showing the relationship among N slot symb , subcarrier spacing setting ⁇ , slot setting, and CP setting according to one aspect of the present embodiment. It is an example showing the configuration of a radio frame, subframes, and slots according to one aspect of the present embodiment.
  • FIG. 4 is a schematic diagram illustrating an example of a resource grid in a subframe according to one aspect of the present embodiment; 1 is a schematic block diagram showing the configuration of a terminal device 1 according to one aspect of the present embodiment;
  • FIG. 1 is a schematic block diagram showing the configuration of a base station device 3 according to one aspect of the present embodiment;
  • FIG. FIG. 4 is a diagram illustrating an example of the number of PDCCH candidates configured per slot according to an aspect of the present embodiment;
  • a and/or B may be a term including “A”, “B”, or "A and B”.
  • a parameter or information indicating one or more values may mean that the parameter or information includes at least a parameter or information indicating the one or more values.
  • the higher layer parameter may be a single higher layer parameter.
  • a higher layer parameter may be an information element (IE: Information Element) containing a plurality of parameters.
  • FIG. 1 is a conceptual diagram of a wireless communication system according to one aspect of the present embodiment.
  • the radio communication system includes terminal devices 1A-1C and base station devices 3A-3B.
  • the terminal devices 1A to 1C are hereinafter also referred to as a terminal device 1 (UE).
  • the base station devices 3A to 3B are hereinafter also referred to as the base station device 3 (gNB or eNB).
  • the base station device 3 may be configured including one or both of MCG (Master Cell Group) and SCG (Secondary Cell Group).
  • MCG is a group of serving cells including at least PCell (Primary Cell).
  • An SCG is a group of serving cells including at least a PSCell (Primary Secondary Cell).
  • a PCell may be a serving cell given based on an initial connection.
  • the MCG may be configured including one or more SCells (Secondary Cells).
  • An SCG may consist of one or more SCells.
  • a serving cell identity is a short identifier for identifying a serving cell. The serving cell identifier may be given by a higher layer parameter.
  • the base station device 3A and the base station device 3B communicate with the terminal device 1 using the same frequency (carrier).
  • the base station device 3A and the base station device 3B communicate with the terminal device 1 using different frequencies (carriers).
  • the base station device 3A communicates with the terminal device 1 using the same frequency (carrier) as that of the base station device 3B and a different frequency (carrier).
  • a frequency in a licensed frequency band is used.
  • frequencies in unlicensed frequency bands are used.
  • At least OFDM Orthogonal Frequency Division Multiplex
  • An OFDM symbol is the time-domain unit of OFDM.
  • An OFDM symbol includes at least one or more subcarriers. OFDM symbols may be converted to time-continuous signals in baseband signal generation.
  • the subcarrier spacing configuration ⁇ may be set to 0, 1, 2, 3, 4, 5, or 6.
  • the subcarrier spacing may be any of 15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz, 480 kHz and 960 kHz.
  • the subcarrier spacing setting ⁇ may be given by higher layer parameters.
  • a time unit (time unit) Tc is used to express the length of the time domain.
  • ⁇ f max may be the maximum subcarrier spacing supported in the wireless communication system according to one aspect of the present embodiment.
  • ⁇ f ref may be 15 kHz.
  • N f,ref may be 2048.
  • the constant ⁇ may be a value that indicates the relationship between the reference subcarrier spacing and Tc .
  • a constant ⁇ may be used for the subframe length. Based at least on a constant ⁇ , the number of slots included in a subframe may be given.
  • ⁇ f ref is the reference subcarrier spacing
  • N f,ref is a value corresponding to the reference subcarrier spacing.
  • a downlink transmission and/or an uplink transmission consists of a 10 ms frame.
  • a frame consists of 10 subframes.
  • a subframe has a length of 1 ms.
  • the frame length may be given regardless of the subcarrier spacing ⁇ f. That is, frame settings may be given regardless of ⁇ .
  • the subframe length may be given regardless of the subcarrier spacing ⁇ f. That is, the subframe setting may be given regardless of ⁇ .
  • the number and index of the slots contained in the subframe may be given.
  • the first slot number n ⁇ s may be given in ascending order within a subframe, ranging from 0 to N subframe, ⁇ slot ⁇ 1.
  • the number and index of the slots contained in the frame may be given.
  • the second slot numbers n ⁇ s,f may be given in ascending order within a frame, ranging from 0 to N frame, ⁇ slot ⁇ 1.
  • N slot symb consecutive OFDM symbols may be included in one slot.
  • N slot symb may be given based at least on part or all of slot configuration and/or CP (Cyclic Prefix) configuration.
  • the slot configuration may be given by at least the higher layer parameter tdd-UL-DL-ConfigurationCommon.
  • CP settings may be provided based at least on higher layer parameters.
  • CP configuration may be given based at least on dedicated RRC signaling.
  • the first slot number and the second slot number are also called slot numbers (slot indices).
  • FIG. 2 is an example showing the relationship among N slot symb , subcarrier spacing setting ⁇ , slot setting, and CP setting according to one aspect of the present embodiment.
  • the subcarrier spacing setting ⁇ is 2
  • the CP setting is normal CP (normal cyclic prefix)
  • the subcarrier spacing setting ⁇ is 2
  • the CP setting is an extended CP (extended cyclic prefix)
  • the N slot symbs in slot configuration 0 may correspond to twice the N slot symbs in slot configuration 1 .
  • common subcarrier interval setting, slot setting, and CP setting may be performed for each cell, or different subcarrier interval setting, slot setting, and CP setting may be performed for each cell.
  • base station apparatus 3A and base station apparatus 3B common subcarrier interval setting, slot setting, and CP setting may be performed, or different subcarrier interval setting, slot setting, and CP setting may be performed. good.
  • FIG. 3 is an example showing configurations of radio frames, subframes, and slots according to one aspect of the present embodiment.
  • the slot length is 0.5 ms
  • the subframe length is 1 ms
  • the radio frame length is 10 ms.
  • a slot may be a unit of resource allocation in the time domain.
  • a slot may be a unit in which one transport block is mapped.
  • a transport block may be mapped to one slot.
  • the transport block is transmitted within a predetermined interval (eg, transmission time interval (TTI: Transmission Time Interval)) defined by a higher layer (eg, MAC: Medium Access Control, RRC: Radio Resource Control). It may be a unit of data that
  • TTI Transmission Time Interval
  • RRC Radio Resource Control
  • the slot length may be given by the number of OFDM symbols.
  • the number of OFDM symbols may be 7 or 14.
  • a slot length may be given based on at least the length of an OFDM symbol.
  • the length of an OFDM symbol may vary based at least on subcarrier spacing.
  • the length of the OFDM symbol may be given based on at least the number of points of Fast Fourier Transform (FFT) used to generate the OFDM symbol.
  • the length of an OFDM symbol may include the length of a cyclic prefix (CP: Cyclic Prefix) added to the OFDM symbol.
  • CP Cyclic Prefix
  • the generated SC -FDMA symbols and/or DFT-s-OFDM symbols are also referred to as OFDM symbols.
  • OFDM includes SC-FDMA or DFT-s-OFDM.
  • the slot length may be 0.0078125 ms, 0.03125 ms, 0.125 ms, 0.25 ms, 0.5 ms, and 1 ms.
  • the slot length may be 1 ms.
  • the slot length may be 0.5 ms.
  • the slot length may be 0.125 ms.
  • the slot length may be 0.03125 ms.
  • the slot length may be 0.0078125 ms.
  • one subframe may consist of 128 slots. For example, if the slot length is 0.03125 ms, one subframe may consist of 32 slots. For example, if the slot length is 0.125 ms, one subframe may consist of 8 slots. For example, if the slot length is 0.25 ms, one subframe may consist of four slots. For example, if the slot length is 0.5 ms, one subframe may consist of two slots. For example, if the slot length is 1 ms, one subframe may consist of one slot.
  • OFDM includes a multi-carrier communication scheme to which waveform shaping (Pulse Shape), PAPR reduction, out-of-band radiation reduction, or filtering and/or phase processing (eg, phase rotation, etc.) is applied.
  • the multi-carrier communication scheme may be a communication scheme that generates/transmits a signal in which a plurality of subcarriers are multiplexed.
  • a radio frame may be given by the number of subframes.
  • the number of subframes for a radio frame may be ten, for example.
  • a radio frame may be given by a number of slots.
  • a common radio frame configuration, subframe configuration, and slot configuration may be set for each cell, or a different radio frame configuration, subframe configuration, and slot configuration may be set for each cell. configuration may be set.
  • a common radio frame configuration, subframe configuration, and slot configuration may be set, or different radio frame configurations, subframe configurations, and A configuration of slots may be set.
  • Antenna ports are defined by the fact that the channel on which a symbol is conveyed on one antenna port can be estimated from the channel on which other symbols are conveyed on the same antenna port.
  • Two antenna ports are QCL (Quasi Co-Located ).
  • Large-scale characteristics may include at least long-term characteristics of the channel.
  • the large scale properties are delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters. It may include at least part or all.
  • a first antenna port and a second antenna port are QCL with respect to beam parameters if the receive beam expected by the receiver for the first antenna port and the receive beam expected by the receiver for the second antenna port and may be the same.
  • a first antenna port and a second antenna port are QCL with respect to beam parameters if the transmit beam expected by the receiver for the first antenna port and the transmit beam expected by the receiver for the second antenna port and may be the same.
  • the terminal device 1 assumes that the two antenna ports are QCL when the large-scale characteristics of the channel through which the symbols are transmitted at one antenna port can be estimated from the channel through which the symbols are transmitted at another antenna port. may be Two antenna ports being QCL may be assumed to be two antenna ports being QCL.
  • N RB,x N RB sc subcarriers and N ( ⁇ ) symb N subframe, symb OFDM symbols is provided.
  • N ⁇ RB,x may denote the number of resource blocks given for subcarrier spacing ⁇ for carrier x.
  • N ⁇ RB,x may be the maximum number of resource blocks allowed for subcarrier spacing ⁇ for carrier x.
  • Carrier x indicates either a downlink carrier or an uplink carrier. That is, x is "DL" or "UL".
  • N ⁇ RB is a designation including N ⁇ RB, DL and/or N ⁇ RB, UL .
  • N RB sc may indicate the number of subcarriers included in one resource block.
  • At least one resource grid may be provided per antenna port p and/or per subcarrier spacing setting ⁇ and/or per Transmission direction setting.
  • the transmission direction includes at least a downlink (DL: DownLink) and an uplink (UL: UpLink).
  • DL: DownLink downlink
  • UL: UpLink uplink
  • a parameter set that includes at least some or all of the antenna port p, the subcarrier spacing setting ⁇ , and the transmission direction setting is also referred to as a first radio parameter set. That is, one resource grid may be provided for each first radio parameter set.
  • downlink carriers carriers included in the serving cell are called downlink carriers (or downlink component carriers).
  • uplink carriers uplink component carriers
  • downlink component carriers and uplink component carriers are collectively referred to as component carriers (or carriers).
  • Each element in the resource grid given for each first radio parameter set is called a resource element.
  • a resource element is identified by an index k sc in the frequency domain and an index l sym in the time domain.
  • resource elements are identified by index k sc in the frequency domain and index l sym in the time domain.
  • a resource element identified by a frequency domain index k sc and a time domain index l sym is also referred to as a resource element (k sc , l sym ).
  • the index k sc in the frequency domain indicates any value from 0 to N ⁇ RB N RB sc ⁇ 1.
  • N ⁇ RB may be the number of resource blocks provided for the subcarrier spacing setting ⁇ .
  • 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 diagram illustrating an example of a resource grid in a subframe according to one aspect of the present embodiment.
  • the horizontal axis is the index l sym in the time domain
  • the vertical axis is the index k sc in the frequency domain.
  • the frequency domain of the resource grid includes N ⁇ RB N RB sc subcarriers.
  • the time domain of the resource grid may contain 142 ⁇ OFDM symbols.
  • One resource block includes N RB sc subcarriers.
  • the time domain of a resource block may correspond to one OFDM symbol.
  • the time domain of a resource block may correspond to 14 OFDM symbols.
  • a time domain of a resource block may correspond to one or more slots.
  • a time domain of a 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 transmit and receive using only a subset of the resource grid.
  • a subset of the resource grid may also be referred to as a BWP, and the BWP may be provided based at least on some or all of the higher layer parameters and/or the DCI.
  • a BWP is also called a Bandwidth Part (BP). That is, the terminal device 1 does not have to be instructed to perform transmission and reception using all sets of resource grids. That is, the terminal device 1 may be instructed to perform transmission/reception using some frequency resources within the resource grid.
  • One BWP may consist of multiple resource blocks in the frequency domain.
  • One BWP may be composed of a plurality of consecutive resource blocks in the frequency domain.
  • a BWP configured for a downlink carrier is also called a downlink BWP.
  • a BWP configured for an uplink carrier is also called an uplink BWP.
  • One or more downlink BWPs may be configured for the terminal device 1.
  • the terminal device 1 may attempt to receive physical channels (eg, PDCCH, PDSCH, SS/PBCH, etc.) on one downlink BWP out of one or more downlink BWPs.
  • the one downlink BWP is also called an activated downlink BWP.
  • One or more uplink BWPs may be configured for the terminal device 1 .
  • the terminal device 1 may attempt to transmit a physical channel (eg, PUCCH, PUSCH, PRACH, etc.) in one uplink BWP out of one or more uplink BWPs.
  • the one uplink BWP is also called an activated uplink BWP.
  • a set of downlink BWPs may be configured for each serving cell.
  • a set of downlink BWPs may include one or more downlink BWPs.
  • a set of uplink BWPs may be configured for each serving cell.
  • a set of uplink BWPs may include one or more uplink BWPs.
  • a higher layer parameter is a parameter included in a higher layer signal.
  • the upper layer signal may be RRC (Radio Resource Control) signaling or MAC CE (Medium Access Control Control Element).
  • the higher layer signal may be an RRC layer signal or may be a MAC layer signal.
  • the higher layer signaling may be common RRC signaling.
  • Common RRC signaling may comprise at least some or all of features C1 to C3 below.
  • Feature C2) Feature containing at least the radioResourceConfigCommon information element C3) Mapped to PBCH
  • the radioResourceConfigCommon information element may contain information indicating settings commonly used in the serving cell.
  • the settings commonly used in the serving cell may include at least PRACH settings.
  • the PRACH configuration may at least indicate one or more random access preamble indices.
  • the PRACH configuration may indicate at least PRACH time/frequency resources.
  • the higher layer signaling may be dedicated RRC signaling.
  • Dedicated RRC signaling may comprise at least some or all of the features D1 to D2 below.
  • Feature D2) Contains at least the radioResourceConfigDedicated information element
  • the radioResourceConfigDedicated information element may include at least information indicating settings unique to the terminal device 1 .
  • the radioResourceConfigDedicated information element may include at least information indicating BWP configuration.
  • the configuration of the BWP may indicate at least frequency resources of the BWP.
  • the MIB, first system information, and second system information may be included in common RRC signaling.
  • higher layer messages that are mapped to the DCCH logical channel and include at least radioResourceConfigCommon may be included in the common RRC signaling.
  • higher layer messages that are mapped to the DCCH logical channel and do not contain the radioResourceConfigCommon information element may be included in the dedicated RRC signaling.
  • higher layer messages that are mapped to the DCCH logical channel and that include at least the radioResourceConfigDedicated information element may be included in the dedicated RRC signaling.
  • the first system information may indicate at least the time index of the SS (Synchronization Signal) block.
  • the SS block is also called SS/PBCH block.
  • the SS/PBCH block is also called SS/PBCH.
  • the first system information may include at least information related to PRACH resources.
  • the first system information may include at least information related to initial connection setup.
  • the second system information may be system information other than the first system information.
  • the radioResourceConfigDedicated information element may contain at least information related to PRACH resources.
  • the radioResourceConfigDedicated information element may include at least information related to initial connection setup.
  • An uplink physical channel may correspond to a set of resource elements that carry information originating in higher layers.
  • An uplink physical channel is a physical channel used in an uplink carrier. In a radio communication system according to an 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
  • 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 Protocol Data Unit, DL-SCH: Downlink -Shared Channel, including part or all of HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) corresponding to PDSCH: Physical Downlink Shared Channel).
  • CSI Channel State Information
  • SR Scheduling Request
  • Transport block Transport block
  • MAC PDU Medium Access Control Protocol Data Unit
  • DL-SCH Downlink -Shared Channel, including part or all of HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) corresponding to PDSCH: Physical Downlink Shared Channel).
  • HARQ-ACK Hybrid Automatic Repeat request ACKnowledgement
  • the HARQ-ACK may include at least HARQ-ACK bits (HARQ-ACK information) corresponding to at least one transport block.
  • the HARQ-ACK bit may indicate ACK (acknowledgement) or NACK (negative-acknowledgement) corresponding to one or more transport blocks.
  • the HARQ-ACK may include at least a HARQ-ACK codebook containing one or more HARQ-ACK bits.
  • the HARQ-ACK bits corresponding to one or more transport blocks may correspond to the 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.
  • CBG Code Block Group
  • a scheduling request may be used at least to request PUSCH resources for initial transmission.
  • the scheduling request bit may be used to indicate either positive SR or negative SR.
  • the Scheduling Request bit indicating a positive SR is also referred to as "positive SR sent”.
  • a positive SR may indicate that PUSCH resources are requested by the terminal device 1 for initial transmission.
  • a positive SR may indicate that the scheduling request is triggered by higher layers.
  • a positive SR may be sent when higher layers indicate to send a scheduling request.
  • the Scheduling Request bit indicating negative SR is also referred to as "negative SR is sent”.
  • a negative SR may indicate that no PUSCH resource is requested for the initial transmission by the terminal device 1 .
  • a negative SR may indicate that no scheduling request is triggered by higher layers.
  • a negative SR may be sent when no scheduling request is indicated to be sent by higher layers.
  • the channel state information may include at least part or all of a channel quality indicator (CQI: Channel Quality Indicator), a precoder matrix indicator (PMI: Precoder Matrix Indicator), and a rank indicator (RI: Rank Indicator).
  • CQI is a metric related to channel quality (eg, propagation strength)
  • PMI is a metric that indicates 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 (eg, PUCCH format 0 to PUCCH format 4).
  • the PUCCH format may be mapped to the PUCCH and transmitted.
  • a PUCCH format may be transmitted on the PUCCH. Transmitting the PUCCH format may be transmitting the PUCCH.
  • PUSCH is used at least to transmit transport blocks (TB, MAC PDU, UL-SCH, PUSCH).
  • PUSCH may be used to transmit at least some or all of transport blocks, HARQ-ACK, channel state information, and scheduling requests.
  • PUSCH is used at least to transmit random access message 3 .
  • PUSCH may be used to transmit information not listed above.
  • the PRACH is used at least to transmit a random access preamble (random access message 1).
  • PRACH is part or all of the initial connection establishment procedure, handover procedure, connection re-establishment procedure, synchronization (timing adjustment) for transmission of PUSCH, and resource request for PUSCH. may be used at least to indicate
  • the random access preamble may be used to notify the base station apparatus 3 of an index (random access preamble index) given by the upper layer of the terminal apparatus 1 .
  • Uplink physical signals are used in uplink radio communication.
  • Uplink physical signals may not be used to transmit information output from higher layers, but are 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 related to the transmission of PUSCH and/or PUCCH.
  • UL DMRS is multiplexed with PUSCH or PUCCH.
  • the base station device 3 may use UL DMRS to perform channel correction for PUSCH or PUCCH.
  • transmitting together the PUSCH and the UL DMRS associated with the PUSCH is simply referred to as transmitting the PUSCH.
  • transmitting together the PUCCH and the UL DMRS associated with the PUCCH is simply referred to as transmitting the 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.
  • the SRS may not be related to PUSCH or PUCCH transmission.
  • the base station apparatus 3 may use SRS for channel state measurement.
  • the SRS may be sent at the end of a subframe in an uplink slot or at a predetermined number of OFDM symbols from the end.
  • the UL PTRS may be the reference signal used at least for phase tracking.
  • a 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 at least some or all of the antenna ports of the UL PTRS and the antenna ports included in the UL DMRS group are QCL.
  • a UL DMRS group may be identified based at least on the antenna port with the lowest index in the UL DMRSs included in the UL DMRS group.
  • the UL PTRS may be mapped to the antenna port with the lowest index among one or more antenna ports to which one codeword is mapped.
  • a UL PTRS may be mapped to the first layer and the second layer if one codeword is mapped to at least the first layer and the second layer.
  • UL PTRS may not be mapped to the second layer.
  • the index of the antenna port to which the UL PTRS is mapped may be given based at least on the downlink control information.
  • the following downlink physical channels are used in downlink radio communication from the base station apparatus 3 to the terminal apparatus 1.
  • FIG. Downlink physical channels are used by the physical layer to transmit information output from higher layers.
  • PBCH Physical Broadcast Channel
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • the PBCH is used at least to transmit a master information block (MIB: Master Information Block, BCH, Broadcast Channel).
  • MIB Master Information Block, BCH, Broadcast Channel
  • PBCH may be transmitted based on a predetermined transmission interval.
  • PBCH may be transmitted at intervals of 80ms.
  • PBCH may be transmitted at intervals of 160ms.
  • the information content contained in the PBCH may be updated every 80ms. Some or all of the information contained in the PBCH may be updated every 160 ms.
  • the PBCH may consist of 288 subcarriers.
  • the PBCH may consist of 2, 3, or 4 OFDM symbols.
  • the MIB may contain information relating to the identifiers (indexes) of the synchronization signals.
  • the MIB may contain information indicating at least part of the slot number, subframe number, and/or radio frame number in which the PBCH is transmitted.
  • the PDCCH is used at least for transmitting downlink control information (DCI).
  • the PDCCH may be transmitted including at least downlink control information.
  • the PDCCH may contain downlink control information.
  • the downlink control information is also called DCI format.
  • the downlink control information may include at least either a downlink grant (DL grant) or an uplink grant (UL grant).
  • a DCI format used for PDSCH scheduling is also referred to as a downlink DCI format.
  • a DCI format used for PUSCH scheduling is also called an uplink DCI format.
  • a downlink grant is also called a downlink assignment (DL assignment) or a downlink allocation (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 includes at least part or all of 1A to 1F.
  • a DCI format specific field may be used at least to indicate which DCI format containing the DCI format specific field corresponds to one or more DCI formats.
  • the one or more DCI formats may be provided based at least on part or all of DCI format 1_0, DCI format 1_1, DCI format 0_0, and/or DCI format 0_1.
  • a frequency domain resource allocation field may be used at least to indicate frequency resource allocation for a PUSCH scheduled by a DCI format that includes the frequency domain resource allocation field.
  • the frequency domain resource allocation field is also called an FDRA (Frequency Domain Resource Allocation) field.
  • a time domain resource allocation field may be used at least to indicate time resource allocation for a PUSCH scheduled by a DCI format that includes the time domain resource allocation field.
  • a frequency hopping flag field may be used at least to indicate whether frequency hopping is applied to the PUSCH scheduled by the DCI format containing the frequency hopping flag field.
  • the MCS field may be used at least to indicate part or all of the modulation scheme and/or the target coding rate for the PUSCH scheduled by the DCI format containing the MCS field.
  • the target code rate may be a target code rate for a transport block of the PUSCH.
  • the transport block size (TBS) may be given based at least on the target coding rate.
  • the CSI request field is used at least to indicate 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, 2, or 3.
  • DCI format 0_1 includes at least part or all of 2A to 2H.
  • 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 2G) BWP field 2H) UL DAI field (Downlink Assignment Index)
  • the UL DAI field is used at least to indicate the PDSCH transmission status. If 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 on PUSCH.
  • the UL DAI field indicates the number of HARQ-ACKs included in the HARQ-ACK codebook transmitted on PUSCH.
  • the UL DAI field indicates the number of PDSCHs in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted on PUSCH.
  • the UL DAI field indicates the number of PDSCH and SPS releases in which the corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted on PUSCH.
  • the UL DAI field may indicate a value to which a modulo operation has been applied. An example in which the UL DAI field is 2 bits will be explained. If the HARQ-ACK codebook transmitted on the PUSCH contains 0 PDSCHs containing the corresponding HARQ-ACK, "00" is indicated as the UL DAI field. When the HARQ-ACK codebook transmitted by PUSCH contains one PDSCH, the UL DAI field indicates "01". If the HARQ-ACK codebook transmitted by PUSCH contains two PDSCHs containing corresponding HARQ-ACKs, "10" is indicated as the UL DAI field.
  • the HARQ-ACK codebook transmitted by PUSCH contains three PDSCHs containing corresponding HARQ-ACKs, "11" is indicated as the UL DAI field. If the HARQ-ACK codebook transmitted on the PUSCH contains four PDSCHs containing the corresponding HARQ-ACK, "00" is indicated as the UL DAI field. If the HARQ-ACK codebook transmitted by PUSCH contains 5 PDSCHs containing corresponding HARQ-ACKs, "01” is indicated as the UL DAI field. When the HARQ-ACK codebook transmitted by PUSCH contains 6 PDSCHs containing corresponding HARQ-ACKs, "10" is indicated as the UL DAI field.
  • the HARQ-ACK codebook transmitted by PUSCH contains 7 PDSCHs containing corresponding HARQ-ACKs, "11" is indicated as the UL DAI field.
  • a modulo operation using the numerical value '4' is performed on the number of PDSCHs in which the corresponding HARQ-ACK is included.
  • the terminal device 1 interprets the UL DAI field considering the total number of received PDSCHs. For example, the terminal device 1 receives four PDSCHs and receives the UL DAI field indicating "00". In this case, the terminal device 1 interprets that the number of PDSCHs whose corresponding HARQ-ACK is included in the HARQ-ACK codebook transmitted by PUSCH indicated by the UL DAI field is four. For example, the terminal device 1 receives three PDSCHs and receives the UL DAI field indicating "00".
  • 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 PUSCH indicated by the UL DAI field is 4, and one PDSCH It is determined that reception has failed.
  • the BWP field may be used to indicate the uplink BWP to which the PUSCH scheduled by DCI format 0_1 is mapped.
  • the CSI request field is used at least to indicate CSI reporting.
  • the size of the CSI request field may be given based at least on the higher 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 includes at least part or all of 3A to 3H.
  • the timing indication field from PDSCH to HARQ feedback may be a field indicating timing K1.
  • the index of the slot containing the last OFDM symbol of PDSCH is slot n
  • the index of the slot containing PUCCH or PUSCH containing at least HARQ-ACK corresponding to the transport block included in the PDSCH is n+K1, good too.
  • the index of the slot containing the last OFDM symbol of PDSCH is slot n
  • the first OFDM symbol of PUCCH or the first OFDM symbol of PUSCH including at least HARQ-ACK corresponding to the transport block included in the PDSCH is The included slot index may be n+K1.
  • the PDSCH-to-HARQ feedback timing indicator field (PDSCH-to-HARQ_feedback timing indicator field) may be referred to as the HARQ indication field.
  • the PUCCH resource indication field may be a field that indicates the index of one or more PUCCH resources included in the PUCCH resource set.
  • DCI format 1_1 includes at least part or all of 4A to 4J.
  • the BWP field may be used to indicate the downlink BWP to which the PDSCH scheduled by DCI format 1_1 is mapped.
  • DCI format 2_0 may be configured to include at least one or more slot format indicators (SFI: Slot Format Indicator).
  • SFI Slot Format Indicator
  • the downlink control information may include a slot format indicator (SFI).
  • SFI slot format indicator
  • the terminal device 1 may determine that subframes (slots) not indicated by the received SFI are flexible subframes (slots).
  • PUSCH transmission is scheduled for a flexible subframe (slot) by UL grant, the terminal device 1 performs processing with the flexible subframe (slot) as an uplink subframe (slot).
  • the terminal device 1 monitors the PDCCH candidate in the flexible subframe (slot) and performs processing to detect the DL assignment.
  • the terminal device 1 performs processing with the flexible subframe (slot) as a downlink subframe (slot).
  • downlink control information including a downlink grant or an uplink grant is transmitted and received on the PDCCH including C-RNTI (Cell-Radio Network Temporary Identifier).
  • C-RNTI Cell-Radio Network Temporary Identifier
  • DCI format 1_0 is a first format (first type of downlink DCI format) containing scheduling information for one PDSCH, or a first format containing scheduling information for multiple (eg, two) PDSCHs.
  • Two formats may be used.
  • DCI format 1_1 may be a first format including scheduling information for one PDSCH, or a second format including scheduling information for multiple (eg, two) PDSCHs.
  • the first format includes one frequency domain resource allocation field, one time domain resource allocation field, and one MCS field.
  • the second format includes multiple (eg, two) frequency domain resource allocation fields, multiple (eg, two) time domain resource allocation fields, and multiple (eg, two) MCS fields.
  • the number of resource blocks indicates the number of resource blocks in the frequency domain unless otherwise specified.
  • a downlink grant may be used at least for scheduling one PDSCH in one serving cell.
  • a downlink grant may be used at least for scheduling multiple PDSCHs within one serving cell.
  • a downlink grant may be used at least for scheduling multiple PDSCHs in multiple serving cells.
  • a downlink grant is used at least for scheduling the PDSCH in the same slot in which the downlink grant was transmitted.
  • a downlink grant may be used for scheduling the PDSCH in a slot different from the slot in which the downlink grant was transmitted.
  • An uplink grant may be used at least for scheduling one PUSCH in one serving cell.
  • An uplink grant may be used at least for scheduling multiple PUSCHs within one serving cell.
  • An uplink grant may be used at least for scheduling multiple PUSCHs in multiple serving cells.
  • DCI formats may further include fields different from the above fields.
  • a field indicating the cumulative number of transmitted PDCCHs (C-DAI: Counter Downlink Assignment Index field) may be included.
  • a field indicating the total number of PDCCHs to be transmitted (T-DAI: Total Downlink Assignment Index field) may be included.
  • K1 information or parameter indicated by the timing indication field from PDSCH to HARQ feedback
  • the value of K1 (information or parameter indicated by the timing indication field from PDSCH to HARQ feedback) indicated by the DCI format included in PDCCH is, for example, ⁇ 0, 1, 2, . . . , 15 ⁇ .
  • the PDSCH scheduled according to the DCI format is transmitted at the base station device 3 and received at the terminal device 1 in slot n.
  • the terminal device 1 may transmit (report) the HARQ-ACK information corresponding to the PDSCH in slot n+K1 via PUCCH or PUSCH.
  • HARQ-ACK bits corresponding to transport blocks transmitted and received in the downlink frequency band (frequency spectrum, carrier, component carrier) of the base station apparatus 3 are the above-described various fields included in the DCI format.
  • PDSCH-to-HARQ feedback timing indicator field, HARQ indication field, PUCCH resource indication field, C-DAI field, T-DAI field, UL DAI field based on at least one of the methods described above, the base station apparatus 3 uplink frequency bands (frequency spectrum, carrier, component carrier).
  • One physical channel may be mapped to one serving cell.
  • One physical channel may be mapped to one BWP configured on one carrier included in one serving cell.
  • the terminal device 1 may be configured with one or more control resource sets (CORESET: ControlREsource SET).
  • the terminal device 1 monitors PDCCH in one or more control resource sets (monitor).
  • monitoring PDCCHs in one or more control resource sets may include monitoring one or more PDCCHs corresponding to each of the one or more control resource sets.
  • the PDCCH may include one or more PDCCH candidates and/or a set of PDCCH candidates.
  • monitoring the PDCCH may include monitoring and detecting the PDCCH and/or the DCI format transmitted over the PDCCH.
  • a control resource set may be a time-frequency domain to which one or more PDCCHs may be mapped.
  • the control resource set may be a region in which the terminal device 1 monitors PDCCH.
  • the control resource set may consist of contiguous resources (localized resources).
  • the control resource set may consist of distributed resources.
  • the unit of mapping of the control resource set may be a resource block.
  • the unit of mapping of the control resource set may be 6 resource blocks.
  • the unit of mapping of the control resource set may be an OFDM symbol.
  • the unit of mapping of the control resource set may be one OFDM symbol.
  • a mapping of control resource sets to resource blocks may be provided based at least on higher layer parameters.
  • the higher layer parameters may include a bitmap for a resource block group (RBG).
  • 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 based at least on higher layer parameters.
  • the base station apparatus 3 notifies the terminal apparatus 1 of the start positions of OFDM symbols that configure the control resource set using higher-layer signaling.
  • the terminal device 1 is notified from the base station device 3 of the end positions of the OFDM symbols that make up the control resource set using higher layer signaling.
  • a given control resource set may be a common control resource set.
  • a common control resource set may be a control resource set that is commonly configured for a plurality of terminal devices 1 .
  • the common control resource set may be provided based at least on part or all of the MIB, first system information, second system information, common RRC signaling, and cell ID.
  • the time resources and/or frequency resources of the control resource set configured 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 with index #0.
  • a given control resource set may be a dedicated control resource set.
  • a dedicated control resource set may be a control resource set configured to be used exclusively for the terminal device 1 .
  • a dedicated control resource set may be granted based at least on dedicated RRC signaling and some or all of the value of the C-RNTI.
  • a plurality of control resource sets may be configured in the terminal device 1, and an index (control resource set index) may be assigned to each control resource set.
  • One or more control channel elements (CCE: Control Channel Element) may be configured in the control resource set, and an index (CCE index) may be assigned to each CCE.
  • a CCE may be configured to include one or more REG (Resource Element Group) groups.
  • a group of REGs is also called a REG bundle.
  • the number of REGs forming one REG group is called Bundle size.
  • Bundle size For example, a REG's Bundle size may be 1, 2, 3, or 6.
  • an interleaver may be applied per REG bundle.
  • Terminal equipment 1 may assume that the precoders applied to REs within a group of REGs are identical.
  • the terminal device 1 can perform channel estimation assuming that the precoders applied to the REs within a group of REGs are the same.
  • the terminal device 1 may assume that precoders applied to REs between groups of REGs are not the same.
  • the terminal device 1 does not have to assume that precoders applied to REs between groups of REGs are the same.
  • "Between groups of REGs” may be rephrased as "between two different groups of REGs.”
  • the terminal device 1 can perform channel estimation assuming that precoders applied to REs between groups of REGs are not the same.
  • a REG may consist of one OFDM symbol of one PRB. That is, the REG may consist of 12 consecutive REs in the frequency domain. Some of the multiple REs forming the REG may be REs to which downlink control information is not mapped. A REG may be configured including REs to which downlink control information is not mapped, or may be configured without including REs to which downlink control information is not mapped. The REs to which downlink control information is not mapped may be REs to which reference signals are mapped, REs to which channels other than control channels are mapped, or REs to which control channels are not mapped. 1 may be RE.
  • a CCE may consist of 6 REGs.
  • a CCE may be composed of REGs that are mapped consecutively (such mapping may be referred to as Localized mapping) (such mapping may be referred to as non-interleaved CCE-to-REG mapping). (Such mapping may be referred to as non-interleaved mapping).
  • Note that not all REGs forming a CCE are necessarily continuous in the frequency domain. For example, if all of the multiple resource blocks that make up the control resource set are not continuous in the frequency domain, even if the numbers assigned to the REGs are continuous, each resource block that makes up each REG with continuous numbers is Not continuous in the frequency domain.
  • the CCE When a control resource set consists 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 consists of a group of REGs that are continuously mapped.
  • a CCE may be composed of non-contiguously mapped REGs (such mapping may be referred to as distributed mapping) (such mapping may be referred to as interleaved CCE-to-REG mapping) ( Such mapping may be referred to as interleaved mapping).
  • REGs forming a CCE may be non-contiguously mapped to resources in the time-frequency domain using an interleaver.
  • 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 is a mixture of REGs of different time intervals (OFDM symbols).
  • a CCE may be configured by REGs that are mapped non-contiguously.
  • a CCE may be composed of REGs distributed and mapped in groups of a plurality of REGs.
  • a CCE may be composed of REGs distributed and mapped in groups of a plurality of REGs.
  • a set of PDCCH candidates monitored by the terminal device 1 is defined from the viewpoint of the search space. In other words, the set of PDCCH candidates monitored by the terminal device 1 is given by the search area.
  • a search area may be configured to include one or more PDCCH candidates of one or more aggregation levels.
  • the PDCCH candidate aggregation level may indicate the number of CCEs that constitute the PDCCH.
  • a PDDCH candidate may be mapped to one or more CCEs.
  • the number of CCEs forming a PDCCH candidate is also called an aggregation level (AL).
  • A aggregation level
  • the set of PDCCH candidates with aggregation level ALx is also called a search area with aggregation level ALx . That is, a search area of aggregation level AL X may be configured to contain one or more PDCCH candidates of aggregation level AL X .
  • the search area may also include PDCCH candidates for multiple aggregation levels. For example, a CSS may include PDCCH candidates for multiple aggregation levels.
  • a USS may include PDCCH candidates for multiple aggregation levels.
  • a set of aggregation levels for PDCCH candidates included in CSS and a set of aggregation levels for PDCCH candidates included in USS may be defined/configured respectively.
  • the terminal device 1 may monitor at least one or more search areas in slots in which DRX (Discontinuous reception) is not set. DRX may be provided based at least on higher layer parameters.
  • the terminal device 1 may monitor at least one or a plurality of search space sets in slots in which DRX is not configured.
  • a plurality of search area sets may be configured in the terminal device 1 . Each search area set may be given an index (search area set index).
  • a search area set may be configured to include at least one or more search areas.
  • An index search area index
  • a search area set may consist of one or more search areas corresponding to one or more aggregation levels.
  • Each search area set may be associated with at least one control resource set.
  • Each of the search area sets may be included in one control resource set.
  • an index of the control resource set associated with the search area set may be provided.
  • the search area may have two types: CSS (Common Search Space) and USS (UE-specific Search Space).
  • the CSS may be a search area that is commonly set for multiple terminal devices 1 .
  • a USS may be a search area containing settings dedicated to an individual terminal device 1 .
  • the CSS may be provided based at least on synchronization signals, MIB, first system information, second system information, common RRC signaling, dedicated RRC signaling, cell ID, and so on. USS may be granted based at least on dedicated RRC signaling and/or the value of C-RNTI.
  • the CSS may be a search area set in a common resource (control resource element) for multiple terminal devices 1 .
  • a USS may be a search area set in a resource (control resource element) for each individual terminal device 1 .
  • the CSS is type 0 PDCCH CSS for DCI format scrambled by SI-RNTI used to transmit system information in the primary cell and RA-RNTI used for initial access, for DCI format scrambled by TC-RNTI
  • Type 1 PDCCH CSS may be used.
  • the CSS may be a type PDCCH CSS for DCI format scrambled by CC-RNTI used for Unlicensed access.
  • 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.
  • CRC Cyclic Redundancy Check
  • Information related to PDCCH reception may include information related to an ID that indicates the destination of the PDCCH.
  • the ID indicating the destination of the PDCCH may be an ID used for scrambling the CRC bits added to the PDCCH.
  • the ID indicating the destination of the PDCCH is also called RNTI (Radio Network Temporary Identifier).
  • the information related to reception of PDCCH may include information related to ID used for scrambling CRC bits attached to PDCCH.
  • the terminal device 1 can attempt to receive the PDCCH based at least on 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 Access - RNTI) , CC-RNTI (Common Control-RNTI), and INT-RNTI (Interruption-RNTI).
  • SI-RNTI is used at least for scheduling PDSCHs that are transmitted with system information.
  • the P-RNTI is used at least for scheduling the PDSCH that is transmitted containing information such as paging information and/or system information change notification.
  • the C-RNTI is used at least for scheduling user data for the RRC-connected terminal device 1 .
  • Temporary C-RNTI is used at least for scheduling random access message 4.
  • Temporary C-RNTI is used at least for scheduling PDSCH containing data mapped to CCCH in logical channels.
  • RA-RNTI is used at least for random access message 2 scheduling.
  • CC-RNTI is used at least for transmission and reception of control information for unlicensed access.
  • INT-RNTI is used at least to indicate Pre-emption in 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 for.
  • CIF Carrier Indicator Field
  • carrier aggregation carrier aggregation
  • CA carrier aggregation
  • the PDCCH and/or DCI included in the USS for the serving cell includes a CIF indicating which serving cell and/or which component carrier PDSCH or PUSCH is scheduled for the PDCCH/DCI. good too.
  • the PDCCH and/or DCI included in the USS includes which serving cell and/or the PDCCH/DCI.
  • the CIF indicating which component carrier PDSCH or PUSCH is scheduled may not be included.
  • the common control resource set may contain CSS.
  • a common control resource set may include both CSS and USS.
  • a dedicated control resource set may include a USS.
  • a dedicated control resource set may include a CSS.
  • the physical resources of the search area are composed of control channel building blocks (CCEs).
  • CCE is composed of a predetermined number of resource element groups (REGs).
  • REGs resource element groups
  • a CCE may consist of 6 REGs.
  • a REG may consist of one OFDM symbol of one PRB (Physical Resource Block). That is, the REG may be configured including 12 Resource Elements (REs).
  • PRB is also simply called an RB (Resource Block).
  • the terminal device 1 can detect the PDCCH and/or DCI for the terminal device 1 by performing blind detection of PDCCH candidates included in the search region within 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 region for the PDCCH included in the control resource set, the type of aggregation level, and the number of PDCCH candidates.
  • the search area set the number of PDCCH candidates for each aggregation level may be set for the terminal device 1 .
  • the type of search area 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 CCEs forming the search area, and is at least one of ⁇ 1, 2, 4, 8, . . .
  • 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/configured for each of a plurality of aggregation levels.
  • the UGSS may be a search area commonly assigned to one or more terminal devices 1 .
  • a GCSS may be a DCI-mapped search area containing CSS-related parameters for one or more terminals 1 .
  • the aggregation level indicates the aggregation level of a predetermined number of CCEs, and is related to the total number of CCEs forming one PDCCH and/or search area.
  • the size of the aggregation level may be associated with the coverage corresponding to the PDCCH and/or the search region or the size of the DCI (DCI format size, payload size) included in the PDCCH and/or the search region.
  • the type of DCI format for which monitoring is performed may be configured.
  • start position (start symbol) of the PDCCH symbol when the start position (start symbol) of the PDCCH symbol is set for one control resource set, and when more than one PDCCH in the control resource set can be detected in a predetermined period may set the type of search region for PDCCHs included in the control resource set, the type of aggregation level, and the number of PDCCH candidates for the time region corresponding to each start symbol.
  • each start position (start symbol) of the PDCCH symbol for one control resource set that is, in a predetermined period, if there are multiple timings for blind detection (monitoring) of the PDCCH
  • each start The type of search region for PDCCHs included in the control resource set, the type of aggregation level, and the number of PDCCH candidates may be set for the time domain corresponding to the symbol.
  • the type of search region, 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, or DCI and/or higher layer signals (RRC signaling ) or may be predefined/set by a specification.
  • the number of PDCCH candidates may be the number of PDCCH candidates in a predetermined period.
  • the predetermined period may be 1 millisecond.
  • the predetermined period of time may be 1 microsecond.
  • the predetermined period may be a period of one slot.
  • the predetermined period may be the period of one OFDM symbol.
  • the number of PDCCH candidates to be reduced from a predetermined number may be defined/set for each aggregation level.
  • the terminal device 1 may transmit/notify the base station device 3 of capability information related to 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 on PDCCH. If the terminal device 1 can configure more than a predetermined number of control resource sets for one or more serving cells/component carriers, the terminal device 1 may transmit/notify the base station device 3 of capability information related to blind detection. good.
  • the terminal device 1 may transmit/notify the base station device 3 of the number of PDCCH candidates that can be processed in one slot as capability information on PDCCH.
  • the terminal device 1 may transmit/notify the base station device 3 of the number of PDCCH candidates that can be processed within a plurality of slots (eg, 4 slots, 8 slots) as PDCCH capability information.
  • the terminal device 1 may transmit/notify the number of PDCCH candidates (upper limit) that can be processed in one slot when multi-slot scheduling and single-slot scheduling are used together to the base station device 3 as PDCCH capability information. good.
  • the terminal device 1 uses both the number of PDCCH candidates (upper limit) that can be processed in one slot when multi-slot scheduling is not used and only single-slot scheduling is applied, and multi-slot scheduling and single-slot scheduling are used together.
  • the number (upper limit) of PDCCH candidates that can be processed in one slot may be transmitted/notified to the base station apparatus 3 as separate information (information elements) as capability information on PDCCH.
  • the terminal device 1 transmits/notifies the base station device 3 of the number (upper limit) (first upper limit) of PDCCH candidates that can be processed in one slot with respect to the DCI format for single-slot scheduling as PDCCH capability information. good too.
  • the terminal device 1 sets the number (upper limit) (first upper limit) of PDCCH candidates that can be processed in one slot with respect to the DCI format for single-slot scheduling when multi-slot scheduling and single-slot scheduling are used together. It may be transmitted/notified to the base station measure 3 as capability information.
  • the terminal device 1 determines the number (upper limit) of PDCCH candidates that can be processed in one slot with respect to the DCI format for single-slot scheduling and the DCI format for multi-slot scheduling when multi-slot scheduling and single-slot scheduling are used together (first upper limit) may be transmitted/notified to the base station measure 3 as capability information on the PDCCH.
  • the terminal device 1 may transmit/notify the base station device 3 of capability information related to PDCCH blind detection for each subcarrier interval.
  • the terminal device 1 If the terminal device 1 can configure more than a predetermined number of control resource sets for a predetermined period of one or more serving cells/component carriers, the terminal device 1 transmits/sends/sends capability information related to blind detection to the base station device 3. may notify you.
  • the ability information related to blind detection may include information indicating the maximum number of times of blind detection in a predetermined period. Also, the capability information related to the blind detection may include information indicating that PDCCH candidates can be reduced. The capability information related to blind detection may also include information indicating the maximum number of control resource sets that can be blind detected in a predetermined time period. The maximum number of control resource sets and the maximum number of serving cells and/or component carriers in which PDCCH can be monitored may be configured as individual parameters or may be configured as common parameters. The capability information related to blind detection may also include information indicating the maximum number of control resource sets for which blind detection can be performed simultaneously in a given period of time.
  • the terminal device 1 If the terminal device 1 does not support the ability to detect (blind detection) more than a predetermined number of control resource sets in a predetermined period, it transmits/notifies capability information related to the blind detection. It doesn't have to be.
  • the base station device 3 may configure the control resource set and transmit the PDCCH so that the predetermined number for the blind detection is not exceeded. .
  • the settings related to the control resource set include a parameter indicating an index (ControlResourceSetId) that identifies the control resource set.
  • the setting regarding the control resource set may include a parameter indicating the frequency resource region of the control resource set (the number of resource blocks forming the control resource set).
  • the configuration regarding the control resource set may include a parameter indicating the type of mapping from CCE to REG.
  • the configuration for the control resource set may include the REG bundle size.
  • RRC signaling may be used to send and receive messages indicating settings for control resource sets.
  • SIBs may be used to send and receive messages that indicate settings for control resource sets.
  • a MIB may be used to send and receive messages that indicate settings for control resource sets.
  • the settings related to the search area include parameters that indicate the index that identifies the search area (search area index).
  • the settings for 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 cycle of slots in which the search area is arranged and the offset (relative slot position 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 areas are arranged consecutively.
  • the configuration for the search region may include a parameter indicating the OFDM symbols within the slot in which PDCCH candidates are monitored.
  • the configuration for the search area may include a parameter indicating the number of PDCCH candidates to be monitored per CCE aggregation level.
  • the settings for the search area may include a parameter indicating the DCI format in which monitoring is performed.
  • the search area settings may include a parameter indicating the type of search area (CSS or USS).
  • RRC signaling may be used to send and receive messages indicating settings for search areas.
  • SIBs may be used to send and receive messages indicating settings for search areas.
  • the MIB may be used to send and receive messages indicating settings for search areas.
  • a downlink grant containing scheduling information for a plurality of PDSCHs may be included in the search area configuration as a parameter indicating the DCI format to be monitored.
  • a downlink grant (DCI format for single-slot scheduling) including scheduling information of one PDSCH for one slot may be included in the configuration related to the search area.
  • a downlink grant (DCI format for multi-slot scheduling) including scheduling information of a plurality of PDSCHs for a plurality of slots may be included in the search area configuration as a parameter indicating the DCI format to be monitored.
  • a downlink grant including PDSCH scheduling information of a plurality of cells may be included in the configuration related to the search area.
  • a downlink grant including scheduling information of multiple PDSCHs of multiple cells may be included in the configuration related to the search area.
  • the plurality of cells may be a cell in which a search area is set and a cell to which cross-carrier scheduling is applied from the cell in which the search area is set.
  • the base station device 3 sets a search area for the terminal device 1.
  • the base station device 3 transmits setting information regarding the search area to the terminal device 1 .
  • the terminal device 1 receives setting information about the search area from the base station device 3 .
  • the terminal device 1 sets a search area based on the information received from the base station device 3 .
  • the PDSCH is used at least for transmitting/receiving transport blocks.
  • the PDSCH may at least be used to transmit/receive random access message 2 (random access response).
  • PDSCH may be used at least to transmit/receive system information including parameters used for initial access.
  • Downlink physical signals are used in downlink wireless communication.
  • Downlink physical signals may not be used to transmit information output from higher layers, but are used by the physical layer.
  • SS Synchronization signal
  • DL DMRS DownLink DeModulation Reference Signal
  • CSI-RS Channel State Information-Reference Signal
  • DL PTRS Down Link Phase Tracking Reference Signal
  • the synchronization signal is used by the terminal device 1 to synchronize the downlink frequency domain and/or time domain.
  • Synchronization signals include PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal).
  • the SS block includes at least part or all of the PSS, SSS, and PBCH.
  • DL DMRS is related to the transmission of PBCH, PDCCH and/or PDSCH.
  • DL DMRS is multiplexed on PBCH, PDCCH and/or PDSCH.
  • the terminal device 1 may use the DL DMRS corresponding to the PBCH, the PDCCH, or the PDSCH in order to perform channel correction of the PBCH, the PDCCH, or the PDSCH.
  • the terminal device 1 may determine that the base station device 3 is transmitting signals based on DL DMRS detection.
  • the CSI-RS may be a signal that is used at least to calculate channel state information.
  • the CSI-RS pattern assumed by the terminal device 1 may be given by at least higher layer parameters.
  • the PTRS may be a signal that is used at least for phase noise compensation.
  • the pattern of PTRS assumed by the terminal device 1 may be given based at least on higher layer parameters and/or DCI.
  • a DL PTRS may be associated with a DL DMRS group that includes at least one or more antenna ports used for DL DMRS.
  • a downlink physical channel and a downlink physical signal are also referred to as a downlink signal.
  • Uplink physical channels and uplink physical signals are also referred to as uplink signals.
  • Downlink signals and uplink signals are also collectively referred to as physical signals.
  • Downlink signals and uplink signals are also collectively referred to as signals.
  • Downlink physical channels and uplink physical channels are collectively referred to as physical channels.
  • Downlink physical signals and uplink physical signals are collectively referred to as physical signals.
  • BCH Broadcast CHannel
  • UL-SCH Uplink-Shared CHannel
  • DL-SCH Downlink-Shared CHannel
  • transport channels Channels used in the Medium Access Control (MAC) layer are called transport channels.
  • the unit of transport channel used in the MAC layer is also called transport block (TB) or MAC PDU.
  • HARQ Hybrid Automatic Repeat reQuest
  • a transport block is a unit of data that the MAC layer delivers to the physical layer. At the physical layer, transport blocks are mapped to codewords, and modulation processing is performed on each codeword.
  • the base station device 3 and the terminal device 1 exchange (transmit and receive) signals in the higher layer.
  • the base station device 3 and the terminal device 1 may transmit and receive RRC signaling (RRC message: Radio Resource Control message; RRC information: Radio Resource Control information) in the radio resource control (RRC) layer.
  • RRC signaling RRC message: Radio Resource Control message
  • RRC information Radio Resource Control information
  • the base station device 3 and the terminal device 1 may transmit and receive MAC CE (Control Element) in the MAC layer.
  • RRC signaling and/or MAC CE are also referred to as higher layer signaling.
  • PUSCH and PDSCH may be used at least to transmit RRC signaling and/or MAC CE.
  • the RRC signaling transmitted by the PDSCH from the base station apparatus 3 may be signaling common to a plurality of terminal apparatuses 1 within the serving cell. Common signaling for multiple terminals 1 within a serving cell is also referred to as common RRC signaling.
  • the RRC signaling transmitted by the PDSCH from the base station device 3 may be signaling dedicated to a certain terminal device 1 (also called dedicated signaling or UE-specific signaling). Signaling dedicated to terminal equipment 1 is also referred to as dedicated RRC signaling.
  • Higher layer parameters specific to the serving cell may be transmitted/received using signaling common to multiple terminal devices 1 within the serving cell or signaling dedicated to a certain terminal device 1 .
  • UE-specific higher layer parameters may be sent/received using dedicated signaling for a given terminal device 1 .
  • BCCH Broadcast Control Channel
  • CCCH Common Control Channel
  • DCCH Dedicated Control Channel
  • BCCH is a higher layer channel used to transmit/receive MIBs.
  • CCCH Common Control CHannel
  • a DCCH Dedicated Control CHannel
  • DCCH is an upper-layer channel used at least for transmitting/receiving dedicated control information to the terminal device 1 .
  • the DCCH may be used, for example, for terminal equipment 1 that is RRC-connected.
  • a BCCH in a logical channel may be mapped to a BCH, DL-SCH or UL-SCH in a transport channel.
  • a CCCH in a Logical Channel may be mapped to a DL-SCH or UL-SCH in a Transport Channel.
  • a DCCH in a Logical Channel may be mapped to a DL-SCH or UL-SCH in a Transport Channel.
  • the UL-SCH on the transport channel may be mapped to the PUSCH on the physical channel.
  • a DL-SCH in a transport channel may be mapped to a PDSCH in a physical channel.
  • a BCH in a transport channel may be mapped to a PBCH in a physical channel.
  • a configuration example of the terminal device 1 according to one aspect of the present embodiment will be described below.
  • FIG. 5 is a schematic block diagram showing the configuration of the terminal device 1 according to one aspect of the present embodiment.
  • the terminal device 1 includes a radio transmitting/receiving section 10 and an upper layer processing section 14 .
  • the radio transmitting/receiving section 10 includes at least part or all of an antenna section 11 , an RF (Radio Frequency) section 12 , and a baseband section 13 .
  • the upper layer processing unit 14 includes at least part or all of the medium access control layer processing unit 15 and the radio resource control layer processing unit 16 .
  • the radio transmitting/receiving unit 10 is also called a transmitting unit, a receiving unit, or a physical layer processing unit.
  • the physical layer processing unit includes a decoding unit.
  • a receiving unit (also referred to as a 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 blind decoding processing on the received signal of the resource corresponding to the PDCCH candidate of the CSS.
  • the reception processing unit of the terminal device 1 monitors PDCCH candidates within the control resource set.
  • the reception processing unit of the terminal device 1 monitors PDCCH candidates within the control resource set.
  • the decoding unit of the terminal device 1 performs different blind decoding processes for DCI formats of different sizes.
  • a transmission unit (also called a transmission processing unit) of the terminal device 1 transmits HARQ-ACK.
  • the transmission processing unit of the terminal device 1 transmits HARQ-ACK for 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 3 .
  • the transmission processing unit of the terminal device 1 transmits HARQ-ACK for the PDSCH of the downlink frequency band (cell, component carrier, carrier) managed by the base station device 3 .
  • the transmission processing unit of the terminal device 1 transmits HARQ-ACK for the PDSCH of the downlink frequency band (cell, component carrier, carrier) managed by the base station device 3 to the uplink frequency band (cell , component carrier, carrier).
  • the upper layer processing unit 14 outputs uplink data (transport blocks) generated by the user's operation or the like to the radio transmission/reception unit 10 .
  • the upper layer processing unit 14 processes the MAC layer, packet data convergence protocol (PDCP) layer, radio link control (RLC) layer, and RRC layer.
  • PDCP packet data convergence protocol
  • RLC radio link control
  • the medium access control layer processing unit 15 provided in the upper layer processing unit 14 performs MAC layer processing.
  • the radio resource control layer processing unit 16 provided in the upper layer processing unit 14 performs RRC layer processing.
  • the radio resource control layer processing unit 16 manages various setting information/parameters of its own device.
  • the radio resource control layer processing unit 16 sets various setting information/parameters based on the upper layer signal received from the base station device 3 . That is, the radio resource control layer processing unit 16 sets various setting information/parameters based on the information indicating the various setting information/parameters received from the base station device 3 .
  • the configuration information may include information related to processing or configuration of physical channels, physical signals (that is, physical layer), MAC layer, PDCP layer, RLC layer, and RRC layer.
  • the parameters may be higher layer parameters.
  • the radio resource control layer processing unit 16 sets a control resource set based on the RRC signaling received from the base station device 3.
  • the radio resource control layer processing unit 16 sets (configures) a search area within the control resource set.
  • the radio resource control layer processing unit 16 sets (configures) PDCCH candidates to be monitored within the control resource set.
  • the radio resource control layer processing unit 16 sets (configures) the number of PDCCH candidates monitored in the control resource set.
  • the radio resource control processing unit 16 sets (configures) aggregation levels of PDCCH candidates monitored in the control resource set.
  • the radio resource control layer processing unit 16 sets the DCI format to be monitored within the control resource set.
  • the radio resource control layer processing unit 16 may set the DCI format to be monitored within the search area.
  • the radio resource control layer processing unit 16 sets the DCI format to be monitored within the control resource set based on RRC signaling indicated by the base station device 3 .
  • the radio resource control layer processing unit 16 may set a DCI format to be monitored within the search area based on RRC signaling indicated from the base station device 3 .
  • the radio resource control layer processing unit 16 sets one or more DCI formats to be monitored in the reception processing unit.
  • the radio transmission/reception unit 10 performs physical layer processing such as modulation, demodulation, encoding, and decoding.
  • the radio 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 radio transmitting/receiving unit 10 modulates, encodes, and generates a baseband signal (converts to a time-continuous signal) of data to generate a physical signal, and transmits the physical signal to the base station apparatus 3 .
  • the RF section 12 converts the signal received via the antenna section 11 into a baseband signal by orthogonal demodulation (down-convert), and removes unnecessary frequency components.
  • the RF section 12 outputs the processed analog signal to the baseband section.
  • 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 fast Fourier transform (FFT) on the CP-removed signal, and converts the signal in the frequency domain. Extract.
  • CP Cyclic Prefix
  • FFT fast Fourier transform
  • the baseband unit 13 performs an inverse fast Fourier transform (IFFT: Inverse Fast Fourier Transform) on the data to generate an OFDM symbol, adds a CP to the generated OFDM symbol, generates a baseband digital signal, Converts band digital signals to analog signals.
  • IFFT Inverse Fast Fourier Transform
  • the RF unit 12 uses a low-pass filter to remove unnecessary frequency components from the analog signal input from the baseband unit 13, up-converts the analog signal to a carrier frequency, and transmits the signal through the antenna unit 11. do. Also, the RF unit 12 amplifies power. Also, the RF unit 12 may have a function of controlling transmission power.
  • the RF section 12 is also called a transmission power control section.
  • the terminal device 1 receives the PDCCH.
  • the terminal device 1 receives the PDSCH.
  • the radio resource control layer processing unit 16 sets a control resource set.
  • the radio resource control layer processing unit 16 sets a 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 set search region of the control resource set.
  • the receiving unit of the terminal device 1 monitors a plurality of PDCCH candidates within a control resource set search region set in a certain slot.
  • the receiving unit of the terminal device 1 monitors PDCCH candidates assuming the DCI format.
  • the decoding unit of the terminal device 1 decodes the monitored PDCCH candidates.
  • the decoding unit of the terminal device 1 decodes the PDCCH candidates, acquires the downlink DCI format, and recognizes the PDSCH scheduling information.
  • the decoding unit of the terminal device 1 decodes the received PDSCH.
  • the receiving unit of the terminal device 1 monitors PDCCH candidates based on the number set based on RRC signaling within the control resource set search area in a certain slot.
  • the receiving unit of the terminal device 1 monitors PDCCH candidates composed of one or more OFDM symbols set based on RRC signaling within a control resource set search region in a certain slot. Note that the receiving unit of the terminal device 1 may set three or more search areas, each of which is a different OFDM symbol search area in a certain slot, and monitor the PDCCH candidates dispersed within the slot. good.
  • the receiving unit of the terminal device 1 monitors the PDCCH candidates assuming the DCI format set based on the RRC signaling.
  • a configuration example of the base station device 3 according to one aspect of the present embodiment will be described below.
  • FIG. 6 is a schematic block diagram showing the configuration of the base station device 3 according to one aspect of this embodiment.
  • the base station device 3 includes a radio transmission/reception section 30 and an upper layer processing section 34 .
  • the radio transmitting/receiving section 30 includes an antenna section 31 , an RF section 32 and a baseband section 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 radio transmitting/receiving unit 30 is also called a transmitting unit, a receiving 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 provided in the upper layer processing unit 34 performs MAC layer processing.
  • a radio resource control layer processing unit 36 provided in the upper layer processing unit 34 performs RRC layer processing.
  • the radio resource control layer processing unit 36 generates downlink data (transport blocks), system information, RRC messages, MAC CE, etc. arranged in the PDSCH, or acquires them from upper nodes, and outputs them to the radio transmitting/receiving unit 30. .
  • the radio resource control layer processing unit 36 manages various setting information/parameters of each terminal device 1 .
  • the radio resource control layer processing unit 36 may set various setting information/parameters for each terminal device 1 via an upper layer signal. That is, the radio resource control layer processing unit 36 transmits/notifies information indicating various setting information/parameters.
  • the configuration information may include information related to processing or configuration of physical channels, physical signals (that is, physical layer), MAC layer, PDCP layer, RLC layer, and RRC layer.
  • the parameters may be higher layer parameters.
  • the radio resource control layer processing unit 36 sets a control resource set for the terminal device 1. Multiple PDCCH candidates are configured (configured) within the configured control resource set.
  • the radio resource control layer processing unit 36 sets a search area for the terminal device 1 .
  • the radio resource control layer processing unit 36 sets the DCI format to be monitored in the search area for the terminal device 1 .
  • the radio resource control layer processing unit 36 sets resources for HARQ-ACK transmission for the terminal device 1 .
  • the radio resource control layer processing unit 36 sets the DCI format applied to the terminal device 1 within the control resource set.
  • the radio resource control layer processing unit 36 generates RRC signaling indicating the DCI format applied to the terminal device 1 .
  • the radio resource control layer processing unit 36 sets one or more DCI formats applied in the transmission processing unit.
  • the functions of the radio transmitting/receiving section 30 are the same as those of the radio transmitting/receiving section 10, so description thereof will be omitted as appropriate. Also, the radio transmitting/receiving unit 30 grasps the SS (Search space) configured in the terminal device 1 . The radio transmitting/receiving unit 30 grasps the search area within the control resource set configured in the terminal device 1 . The radio transmitting/receiving unit 30 comprehends the PDCCH candidates monitored in the terminal device 1 and comprehends the search area. The radio transmitting/receiving unit 30 grasps which control channel element each PDCCH candidate monitored in the terminal device 1 consists of (grasp the number of the control channel element in which the PDCCH candidate is formed).
  • the radio 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 (number of PDCCH candidates, number of PDCCH candidates) configured in the search area of the control resource set of the terminal device 1 .
  • the SS comprehension unit comprehends the configuration of the search region in the control resource set (number of PDCCH candidates, OFDM symbols of PDCCH candidates, aggregation level of PDCCH candidates).
  • the transmitting unit (transmission processing unit) of the radio transmitting/receiving unit 30 transmits PDCCH to the terminal device 1 using PDCCH candidates within the control resource set search region.
  • the reception unit (also called reception processing unit) of the base station device 3 receives HARQ-ACK.
  • the reception processing unit of the base station device 3 receives HARQ-ACK for the PDSCH.
  • the reception processing unit of the base station device 3 receives HARQ-ACK in the uplink frequency band (cell, component carrier, carrier).
  • the reception processing unit of the base station apparatus 3 receives HARQ-ACK for the PDSCH of the downlink frequency band (cell, component carrier, carrier) in the uplink frequency band (cell, component carrier, carrier).
  • Each of the units denoted by reference numerals 10 to 16 provided in the terminal device 1 may be configured as a circuit.
  • Each of the units denoted by reference numerals 30 to 36 provided in the base station device 3 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 and transmit the UCI on the PUCCH.
  • the terminal device 1 may multiplex and transmit the UCI on the PUSCH.
  • UCI includes downlink channel state information (CSI), scheduling request indicating PUSCH resource request (Scheduling Request: SR), downlink data (Transport block, Medium Access Control Protocol Data Unit: MAC PDU, Downlink-Downlink Shared Channel: At least one of HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) for DL-SCH, Physical Downlink Shared Channel: PDSCH) may be included.
  • CSI downlink channel state information
  • SR scheduling request indicating PUSCH resource request
  • SR downlink data
  • Transport block Medium Access Control Protocol Data Unit: MAC PDU
  • MAC PDU Medium Access Control Protocol Data Unit
  • HARQ-ACK Hybrid Automatic Repeat request ACKnowledgement
  • PDSCH Physical Downlink Shared Channel
  • 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. .
  • the HARQ-ACK may include at least HARQ-ACK bits corresponding to at least one transport block.
  • the HARQ-ACK bit may indicate ACK (ACKnowledgement) or NACK (Negative-ACKnowledgement) corresponding to one or more transport blocks.
  • the HARQ-ACK may include at least a HARQ-ACK codebook containing one or more HARQ-ACK bits.
  • the HARQ-ACK bits corresponding to one or more transport blocks may correspond to the 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 provided per HARQ process.
  • a field indicating the HARQ process identifier is included in the DCI format.
  • An NDI (New Data Indicator) is indicated in DCI format for each HARQ process.
  • a DCI format (DL assignment) including PDSCH scheduling information includes an NDI field.
  • the NDI field is 1 bit.
  • the terminal device 1 stores (stores) the value of NDI for each HARQ process.
  • the base station apparatus 3 stores (memorizes) the NDI value for each HARQ process for each terminal apparatus 1 .
  • the terminal device 1 updates the stored NDI value using the detected NDI field of the DCI format.
  • the base station device 3 sets the updated NDI value or the non-updated NDI value in the NDI field of the DCI format, and transmits it to the terminal device 1 .
  • the terminal device 1 uses the NDI field of the detected DCI format to update the stored NDI value for the HARQ process corresponding to the detected value of the HARQ process identifier field of the DCI format.
  • 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 value of NDI previously received for a transport block of a certain HARQ process, and if the value of the NDI field of the detected DCI format has been toggled, the received transport block is It is determined that it is a new transmission.
  • the base station device 3 toggles the NDI value stored for the HARQ process and transmits the toggled NDI to the terminal device 1 .
  • the base station apparatus 3 When transmitting a retransmission transport block in a certain HARQ process, the base station apparatus 3 does not toggle the NDI value stored for the HARQ process, and transmits the non-toggled NDI to the terminal apparatus 1 .
  • the terminal device 1 compares the value of the NDI field previously received for a transport block of a HARQ process, and if the value of the NDI field of the detected DCI format has not been toggled (if it is the same), the received determine that the received transport block is a retransmission. Note that toggling here means switching to a different value.
  • the terminal device 1 stores the HARQ-ACK information in the DCI format 1_0 corresponding to PDSCH reception or in the slot indicated by the value of the HARQ indication field included in the DCI format 1_1. ) may be used to report to the base station apparatus 3 .
  • the value of the HARQ indication field may be mapped to a set of slot numbers (1, 2, 3, 4, 5, 6, 7, 8).
  • the value of the HARQ indication field may be mapped to the set of slot numbers given by the higher layer parameter dl-DataToUL-ACK.
  • the number of slots indicated at least based on the value of the HARQ indication field may also be referred to as HARQ-ACK timing, or K1.
  • HARQ-ACK representing the decoding status of PDSCH (downlink data) transmitted in slot n may be reported (transmitted) in slot n+K1.
  • dl-DataToUL-ACK indicates a list of HARQ-ACK timings for PDSCH. Timing is the number of slots between the slot in which the PDSCH is received (or the slot containing the last OFDM symbol to which the PDSCH is mapped) and the slot in which the HARQ-ACK for the received PDSCH is transmitted. be.
  • dl-DataToUL-ACK is a list of 1, or 2, or 3, or 4, or 5, or 6, or 7, or 8 timings. If dl-DataToUL-ACK is a list of 1 timing, the HARQ indication field is 0 bits. If dl-DataToUL-ACK is a list of 2 timings, the HARQ indication field is 1 bit.
  • the HARQ indication field is 2 bits.
  • the HARQ indication field is 3 bits.
  • dl-DataToUL-ACK consists of a list of timing values anywhere in the range 0-31.
  • dl-DataToUL-ACK consists of a list of timing values anywhere in the range 0-63.
  • the size of dl-DataToUL-ACK is defined as the number of elements that dl-DataToUL-ACK contains.
  • the size of dl-DataToUL-ACK may be referred to as L para .
  • the index of the dl-DataToUL-ACK may be given or indicated or indicated by the value indicated by the HARQ indication 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 8 elements, the size of the HARQ-ACK codebook is 8. For example, if the dl-DataToUL-ACK consists of two elements, the size of the HARQ-ACK codebook is two.
  • Each HARQ-ACK information that constitutes 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 called semi-static HARQ-ACK codebook.
  • dl-DataToUL-ACK consists of a list of eight timings 0, 7, 15, 23, 31, 39, 47, 55, and the HARQ indication field consists of 3 bits.
  • "000" in the HARQ indication field corresponds to the first 0 in the dl-DataToUL-ACK list as the corresponding timing. That is, "000" in the HARQ indication field corresponds to value 0 indicated by index 1 of dl-DataToUL-ACK.
  • the HARQ indication field "001" corresponds to the second 7 in the list of dl-DataToUL-ACK as the corresponding timing.
  • the HARQ indication field "010" corresponds to the third 15 in the dl-DataToUL-ACK list as the corresponding timing.
  • the HARQ indication field "011” corresponds to the fourth 23 in the dl-DataToUL-ACK list as the corresponding timing.
  • the HARQ indication field "100” corresponds to the fifth 31 in the dl-DataToUL-ACK list as the corresponding timing.
  • the HARQ indication field "101” corresponds to the sixth 39 in the dl-DataToUL-ACK list as the corresponding timing.
  • the HARQ indication field "110” corresponds to the seventh 47 in the dl-DataToUL-ACK list as the corresponding timing.
  • the terminal device 1 transmits a corresponding HARQ-ACK in the 0th slot from the received PDSCH slot. If the received HARQ indication field indicates '001', the terminal device 1 transmits a corresponding HARQ-ACK in the seventh slot from the received PDSCH slot. If the received HARQ indication field indicates "010", the terminal device 1 transmits a corresponding HARQ-ACK in the 15th slot from the received PDSCH slot.
  • the terminal device 1 transmits a corresponding HARQ-ACK in the 23rd slot from the received PDSCH slot.
  • the terminal device 1 transmits a corresponding HARQ-ACK in the 31st slot from the received PDSCH slot.
  • the received HARQ indication field indicates "101”
  • the terminal device 1 transmits a corresponding HARQ-ACK in the 39th slot from the received PDSCH slot.
  • the received HARQ indication field indicates "110”
  • the terminal device 1 transmits a corresponding HARQ-ACK in the 47th slot from the received PDSCH slot.
  • the received HARQ indication field indicates "111”
  • the terminal device 1 transmits a corresponding HARQ-ACK in the 55th slot from the received PDSCH slot.
  • the N PDSCH repeat may be the value of pdsch-AggregationFactor.
  • the N PDSCH repeat may be 1 if the terminal device 1 was not provided with the higher layer parameter pdsch-AggregationFactor.
  • 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.
  • k may be the number of slots indicated by the HARQ indication field included in the DCI format corresponding to the PDSCH reception.
  • k may be given by the higher layer parameter dl-DataToUL-ACK.
  • the HARQ-ACK timing values K1 are (1, 2, 3, 4, 5, 6, 7, 8) may be part or all. If the terminal device 1 is configured to monitor a PDCCH containing DCI format 1_1, the HARQ-ACK timing value K1 may be given by the higher layer parameter dl-DataToUL-ACK.
  • the terminal device 1 determines a set of multiple opportunities for one or more candidate PDSCH receptions to transmit corresponding HARQ-ACK information on the PUCCH of a slot.
  • the terminal device 1 may determine multiple slots with slot timing K1 included in the dl-DataToUL-ACK as multiple opportunities for candidate PDSCH reception.
  • K1 may be a set of k.
  • dl-DataToUL-ACK is (1, 2, 3, 4, 5, 6, 7, 8)
  • PDSCH reception of n-1 slots PDSCH of n-2 slots Receive, PDSCH reception on slot n-3, PDSCH reception on slot n-4, PDSCH reception on slot n-5, PDSCH reception on slot n-6, PDSCH reception on slot n-7, n-8
  • HARQ-ACK information for PDSCH reception in the slots of .
  • the terminal device 1 sets ACK or NACK as HARQ-ACK information based on the transport block included in the PDSCH, and corresponds to candidate PDSCH reception.
  • NACK is set as HARQ-ACK information when the PDSCH is not received in the corresponding slot.
  • the HARQ indication field included in the DCI format received on the PDCCH of slot n-1 indicates 1.
  • the HARQ indication field included in the DCI format received on the PDCCH of slot n ⁇ 2 indicates 2.
  • the HARQ indication field included in the DCI format received on the PDCCH of slot n ⁇ 3 indicates 3.
  • the HARQ indication field included in the DCI format received on the PDCCH of slot n ⁇ 4 indicates 4.
  • the HARQ indication field included in the DCI format received on the PDCCH of slot n ⁇ 5 indicates 5.
  • the HARQ indication field included in the DCI format received on the PDCCH of slot n ⁇ 6 indicates 6.
  • the HARQ indication field included in the DCI format received on the PDCCH of slot n ⁇ 7 indicates 7.
  • the HARQ indication field included in the DCI format received on the PDCCH of slot n ⁇ 8 indicates 8.
  • the terminal device 1 Based on the slot in which the PDCCH was received and the value of the HARQ indication field included in the received DCI format, the terminal device 1 selects a slot for transmitting HARQ-ACK information and a plurality of candidate PDSCH receptions corresponding to the HARQ-ACK information. Determine the set of slots. For example, if dl-DataToUL-ACK is (1, 2, 3, 4, 5, 6, 7, 8), terminal device 1 receives PDCCH in slot m, and the HARQ indication field included in the DCI format is 4. is shown. The terminal device 1 determines to transmit HARQ-ACK information in slot (m+4).
  • HARQ-ACK information for PDSCH reception in slot (m+(1-4)) and slot (m+(2-4) is HARQ-ACK information for PDSCH reception in slot (m+(1-4)) and slot (m+(2-4)).
  • HARQ-ACK codebook has been described above as the type of HARQ-ACK codebook, a different type of HARQ-ACK codebook may be used.
  • a type of HARQ-ACK codebook called Dynamic HARQ-ACK codebook will be described.
  • a HARQ-ACK codebook corresponding to a PDSCH group is one or more HARQ-ACK codebooks corresponding to one or more transport blocks included in one or more PDSCHs included in the PDSCH group. Given based on the ACK bit.
  • a HARQ-ACK codebook is provided based at least on a set of Monitoring occasions for PDCCH, some or all of the counter DAI field values.
  • a HARQ-ACK codebook may be given based further on the value of the UL DAI field.
  • the HARQ-ACK codebook may be given further based on the value of the DAI field.
  • a HARQ-ACK codebook may be provided 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 fields of the DCI format.
  • the size of the HARQ-ACK codebook may be set based on the value of the counter DAI field of the last received DCI format.
  • the Counter DAI field indicates the cumulative number of PDSCHs or transport blocks scheduled until reception of the corresponding DCI format.
  • the Counter DAI field may indicate the cumulative number of PDCCHs transmitted until reception of the corresponding DCI format.
  • the size of the HARQ-ACK codebook may be set based on the value of the Total DAI field of the DCI format.
  • the Total DAI field indicates the total number of PDSCHs or transport blocks scheduled until the transmission of the HARQ-ACK codebook.
  • the Total DAI field may indicate the total number of PDCCHs transmitted until transmission of the HARQ-ACK codebook.
  • the terminal device 1 sets a set of PDCCH monitoring opportunities for HARQ-ACK information transmitted on the PUCCH allocated to the slot of index n (slot#n) based on the value of the timing K1 and the value of the slot offset K0. may be determined based at least on part or all of
  • the set of PDCCH monitoring occasions for HARQ-ACK information transmitted on the PUCCH located in the slot of index n is also called the set of PDCCH monitoring occasions for PDCCH for slot#n. called.
  • the set of PDCCH monitoring opportunities includes M PDCCH monitoring opportunities.
  • slot offset K0 may be indicated based at least on the value of the time domain resource allocation field included in the downlink DCI format.
  • the slot offset K0 is from the slot containing the last OFDM symbol in which the PDCCH including the DCI format including the time domain resource allocation field indicating the slot offset K0 is arranged to the first OFDM symbol of the PDSCH scheduled according to the DCI format. is a value indicating the number of slots (slot difference) in
  • the terminal device 1 may determine the PDCCH monitoring opportunity to be the PDCCH monitoring opportunity for slot n. Also, if the DCI format detected in the monitoring opportunity of the search area set corresponding to a certain PDCCH monitoring opportunity does not trigger (does not include triggering information) to transmit HARQ-ACK information in slot n, the terminal device 1 may not determine the PDCCH monitoring opportunity as the PDCCH monitoring opportunity for slot n. Also, if the DCI format is not detected in the search area set monitoring opportunity corresponding to a certain PDCCH monitoring opportunity, the terminal device 1 may not determine the PDCCH monitoring opportunity as the PDCCH monitoring opportunity for slot n. .
  • the PUCCH resource used for transmitting HARQ-ACK information in slot n is the PUCCH resource included in the last DCI format among one or more DCI formats detected in the set of PDCCH monitoring opportunities for slot n. It may be specified based on at least the indication field. Here, each of the one or more DCI formats has triggered the transmission of HARQ-ACK information in slot n.
  • the last DCI format may be the DCI format corresponding to the last index (highest index) among the DCI formats detected in the set of PDCCH monitoring occasions for that slot n.
  • the index of the DCI format in the set of PDCCH monitoring opportunities for the slot n is given in ascending order to the index of the serving cell where the DCI format is detected, then the PDCCH monitoring opportunity where the DCI format is detected. are given in ascending order with respect to the index of The PDCCH monitoring opportunity indices are given in ascending order on the time axis.
  • Counter DAI is the cumulative number of PDCCHs (or cumulative may be at least a value associated with a number). Counter DAI may also be referred to as C-DAI.
  • a C-DAI corresponding to a PDSCH may be indicated by a field included in the DCI format used for scheduling the PDSCH.
  • the total DAI may indicate the cumulative number of PDCCHs detected (or at least a value related to the cumulative number) detected by PDCCH monitoring opportunity m in M PDCCH monitoring occasions.
  • the total DAI may be called T-DAI (Total Downlink Assignment Index).
  • FIG. 7 is a diagram showing an example of the number of PDCCH candidates configured for each slot.
  • configured PDCCH candidates refer to PDCCH candidates configured according to RRC signaling parameters.
  • the base station apparatus 3 uses RRC signaling to notify the terminal apparatus 1 of the number of PDCCH candidates in the search region for each slot.
  • the terminal device 1 is notified of the number of PDCCH candidates in the search region for each slot from the base station device 3 using RRC signaling.
  • the parameters of a plurality of search regions (cycle, number of PDCCH candidates for each aggregation level) are notified from the base station apparatus 3 to the terminal device 1, and one or more PDCCH candidates of the search region configured for each slot. is shown in FIG.
  • a plurality of upper limit values are used in the terminal device 1 .
  • the upper limit is for the number of monitored PDCCH candidates used to adjust (drop) the PDCCH candidates configured in the terminal 1 .
  • a plurality of upper limits may be set based on the capabilities of the terminal device 1, and the terminal device 1 may notify the base station apparatus 3 of information about the plurality of upper limits.
  • a plurality of upper limit values are set (configured) in the base station device 3, a parameter indicating the plurality of upper limit values set using RRC signaling is notified to the terminal device 1, and the terminal device 1 receives a plurality of values based on the RRC signaling. You may set the upper limit of The first upper limit value is used in units of one slot.
  • the second upper limit value is used in multiple slot units.
  • the first upper limit is the upper limit of the number of PDCCH candidates monitored in one slot.
  • the second upper limit is the upper limit of PDCCH candidates monitored in multiple slots.
  • the first upper bound value may be an upper bound value used for monitoring PDCCH candidates including a DCI format for single-slot scheduling (first DCI format).
  • the second upper limit value may be an upper limit value used for monitoring PDCCH candidates including a DCI format for multi-slot scheduling (second DCI format).
  • the second upper bound may be the upper bound used for monitoring both PDCCH candidates containing DCI formats for multi-slot scheduling and PDCCH candidates containing DCI formats for single-slot scheduling.
  • a DCI format for multi-slot scheduling is configured for the search area configured for slot #0.
  • a DCI format for single-slot scheduling is configured for the search areas of slot #2, slot #5, and slot #6.
  • the terminal device 1 determines whether the PDCCH candidates configured for each slot exceed the first upper limit value.
  • the terminal device 1 determines whether the PDCCH candidates that can include the DCI format for single-slot scheduling exceed the first upper limit value. Since the number of PDCCH candidates configured for slot #2 is 10, which exceeds the first upper limit of 8, the terminal device 1 drops the PDCCH candidates configured for slot #2. , so that the monitored PDCCH candidates are no more than 8 (smaller). Since the number of PDCCH candidates configured for slot #5 is 5 and does not exceed the first upper limit of 8, the terminal device 1 does not adjust (do not drop, do not decrease) the configured PDCCH candidates. , not less). Since the number of PDCCH candidates configured for slot #6 is 5 and does not exceed the first upper limit of 8, the terminal device 1 does not adjust (do not drop, do not decrease) the configured PDCCH candidates. , not less).
  • the terminal device 1 determines whether the PDCCH candidates configured for the 8 slots exceed the second upper limit value.
  • adjusted PDCCH candidates are used for slots for which the configured PDCCH candidates exceed the first upper bound.
  • the number of PDCCH candidates configured in slot #0 configured with the DCI format for multi-slot scheduling is 30, and based on the first upper limit value in slot #2 configured with the DCI format for single-slot scheduling
  • There are 8 PDCCH candidates adjusted for each channel 5 PDCCH candidates are configured in slot #5 in which the DCI format for single-slot scheduling is configured, and the DCI format for single-slot scheduling is configured.
  • the terminal device 1 may preferentially drop PDCCH candidates in the search region with the largest or smallest search region number within eight slots.
  • the terminal device 1 may preferentially drop PDCCH candidates in a search region configured with a DCI format for multi-slot scheduling.
  • the terminal device 1 may preferentially drop PDCCH candidates in the search region of the first or last slot.
  • the terminal device 1 drops 3 PDCCH candidates among the PDCCH candidates configured for slot #0, and sets the number of PDCCH candidates monitored in slot #0 to 27. For example, the terminal device 1 drops three PDCCH candidates among the PDCCH candidates configured for slot #6, and sets the number of PDCCH candidates monitored in slot #6 to two. For example, in slot #6, if five PDCCH candidates are configured in one configuration search region, the terminal device 1 selects all five PDCCH candidates configured for slot #6. PDCCH candidates may be dropped. In other words, the terminal device 1 may drop the PDCCH candidates in units of the search region within the slot.
  • the terminal device 1 When search regions with a plurality of configurations are configured in a slot, the terminal device 1 preferentially monitors PDCCH candidates in search regions with lower search region numbers, and monitors PDCCH candidates in search regions with higher search region numbers. PDCCH candidates in the search area may be preferentially dropped.
  • the reception processing unit of the terminal device 1 adjusts (drops, reduces) the PDCCH candidates configured for each slot so that the number of PDCCH candidates monitored in each slot does not exceed the first upper limit ,Reduce).
  • the reception processing unit of the terminal device 1 determines whether or not the number of PDCCH candidates configured for each slot exceeds the first upper limit value.
  • the PDCCH candidate to be adjusted is a DCI format using a DCI format for single-slot scheduling (first DCI format).
  • the reception processing unit of the terminal device 1 determines that the number of PDCCH candidates configured for the slot exceeds the first upper limit, one or more PDCCH candidates of the PDCCH candidates configured for the slot Drop (fewer, fewer) candidates so that the number of PDCCH candidates monitored for that slot is within the first upper bound.
  • the reception processing unit of the terminal device 1 does not drop (reduce) the PDCCH candidates configured for the slot. no, no less).
  • the reception processing unit of the terminal device 1 sets the PDCCH candidates configured for multiple slots so that the number of PDCCH candidates monitored in multiple slots does not exceed the second upper limit, or the first upper limit. Adjust (drop, reduce, lessen) the adjusted PDCCH candidates based on. In a plurality of slots, the reception processing unit of the terminal device 1 generates PDCCH candidates configured for one or more slots and PDCCH candidates adjusted based on the first upper limit value for one or more slots. exceeds the second upper limit value.
  • PDCCH candidates are adjusted based on the first upper limit for slots in which the search area in which the DCI format for single-slot scheduling is configured (judgment based on the first upper limit The number of adjusted PDCCH candidates is used in the decision based on the second upper bound, including cases where the resulting configured PDCCH candidates are not dropped (not reduced, not reduced).
  • the PDCCH candidates are not adjusted based on the first upper limit value, and the configuration The number of PDCCH candidates determined is used in the decision based on the second upper bound.
  • the reception processing unit of the terminal device 1 In a plurality of slots, the reception processing unit of the terminal device 1 generates PDCCH candidates configured for one or more slots and PDCCH candidates adjusted based on the first upper limit value for one or more slots. exceeds a second upper limit value, drop one or more PDCCH candidates of the configured PDCCH candidates or drop one or more PDCCH candidates of the adjusted PDCCH candidates; Or drop one or more PDCCH candidates in each of the configured PDCCH candidates and the adjusted PDCCH candidates to adjust the number of monitored PDCCH candidates, so that the total number of monitored PDCCH candidates in multiple slots is Be within the second upper limit.
  • the reception processing unit of the terminal device 1 In a plurality of slots, the reception processing unit of the terminal device 1 generates PDCCH candidates configured for one or more slots and PDCCH candidates adjusted based on the first upper limit value for one or more slots. does not exceed the second upper limit, do not drop the configured PDCCH candidates and the adjusted PDCCH candidates in multiple slots, and monitor the PDCCH candidates.
  • the SS grasping unit of the base station device 3 grasps the PDCCH candidates monitored by the reception processing unit of the terminal device 1 as described above.
  • the base station apparatus 3 transmits PDCCH to the terminal apparatus 1 using any of the identified PDCCH candidates.
  • the radio resource control layer processing unit 16 of the terminal device 1 is a configuration of a search area including at least the number of PDCCH candidates for each period, offset, aggregation level, and DCI format, and RRC signaling indicating the configuration of a plurality of search areas Configure PDCCH candidates for each DCI format for each slot based on .
  • the radio resource control layer processing unit 36 of the base station apparatus 3 has a search area configuration including at least the number of PDCCH candidates for each period, offset, aggregation level, and DCI format. , configures PDCCH candidates of each DCI format for each slot for the terminal device 1, and generates RRC signaling indicating the configuration of multiple search regions.
  • the present invention it is possible to efficiently transmit and receive downlink control channels between the terminal device 1 and the base station device 3 while suppressing the processing load on the terminal device 1 .
  • Single-slot scheduling can be efficiently supported while reducing the processing load of the terminal device 1 regarding PDCCH monitoring in multiple slots.
  • the number of PDCCH candidates for single-slot scheduling is reduced to the number of PDCCH candidates that can be processed by the terminal device 1 in a short period of time. can be suppressed.
  • the terminal apparatus 1 While the base station apparatus 3 can flexibly set the configuration of the search area in consideration of the situation of a plurality of terminal apparatuses 1, the terminal apparatus 1 locally processes the downlink control channel for monitoring the configured PDCCH candidates. When the load is exceeded, the monitoring processing of PDCCH candidates can be suppressed within the processing capability of the terminal device 1, and efficient communication can be realized.
  • a first aspect of the present invention is a terminal device comprising a processor and a memory storing computer program code, in which a configuration of a search region including at least the number of PDCCH candidates for each period, offset, and aggregation level receiving RRC signaling indicating configurations of a plurality of search areas; configuring PDCCH candidates for each slot based on the RRC signaling indicating configurations of a plurality of search areas; adjusting the number of PDCCH candidates monitored in each slot using an upper bound, wherein if the number of PDCCH candidates configured for a slot exceeds the first upper bound, for that slot dropping at least some of the PDCCH candidates configured for the slot to set the number of PDCCH candidates monitored in the slot, and the number of PDCCH candidates configured for the slot does not exceed the first upper limit If so, do not drop the PDCCH candidates configured for that slot, set the number of PDCCH candidates monitored in that slot, and use the second
  • the PDCCH candidates whose number is adjusted based on the first upper limit are PDCCH candidates using a DCI format for single-slot scheduling, and the number is adjusted based on the second upper limit
  • the PDCCH candidates used are the PDCCH candidates using the DCI format for single-slot scheduling and the PDCCH candidates using the DCI format for multi-slot scheduling.
  • a second aspect of the present invention is a base station apparatus comprising a processor and a memory storing computer program code, wherein the search area includes at least the number of PDCCH candidates for each period, offset, and aggregation level.
  • the number does not exceed the first upper limit, do not drop the PDCCH candidates configured for that slot, and know the number of PDCCH candidates monitored in that slot; Using the upper limit value to determine the number of PDCCH candidates monitored in multiple slots, wherein the total number of PDCCH candidates determined based on the first upper limit value for multiple slots is equal to the first If the upper limit of two is exceeded, drop at least a portion of the PDCCH candidates identified for at least one slot, determine the number of PDCCH candidates monitored in multiple slots, and determine the number of PDCCH candidates monitored in multiple slots, and If the total number of PDCCH candidates configured based on one upper limit value does not exceed the second upper limit value, do not drop the PDCCH candidates identified based on the first upper limit value, and add to multiple slots determining the number of PDCCH candidates determined based on the first upper bound.
  • the PDCCH candidates whose number is grasped based on the first upper limit value are PDCCH candidates using the DCI format for single-slot scheduling, and the number is grasped based on the second upper limit value.
  • the PDCCH candidates used are the PDCCH candidates using the DCI format for single-slot scheduling and the PDCCH candidates using the DCI format for multi-slot scheduling.
  • a third aspect of the present invention is a communication method used in a terminal device, the configuration of a search region including at least the number of PDCCH candidates for each period, offset, and aggregation level, wherein a plurality of the search receiving RRC signaling indicating a configuration of a region; configuring PDCCH candidates for each slot based on said RRC signaling indicating a configuration of a plurality of said search regions; using a first upper bound, adjusting the number of PDCCH candidates monitored in each slot, wherein if the number of PDCCH candidates configured for the slot exceeds the first upper limit, the PDCCH candidates configured for that slot; to set the number of PDCCH candidates monitored in that slot, and if the number of PDCCH candidates configured for the slot does not exceed the first upper limit, for that slot setting the number of PDCCH candidates to be monitored in the slot without dropping PDCCH candidates configured in multiple slots; and adjusting the number of PDCCH candidates to be monitored in multiple slots using a second upper bound.
  • PDCCH candidates adjusted for at least one slot if the sum of the number of PDCCH candidates adjusted based on the first upper limit for multiple slots exceeds the second upper limit to set the number of PDCCH candidates monitored in multiple slots, and the sum of the number of PDCCH candidates set based on the first upper limit value for multiple slots equals the second If the upper limit of is not exceeded, do not drop the PDCCH candidates adjusted based on the first upper limit, and set the number of PDCCH candidates adjusted based on the first upper limit for multiple slots and
  • the PDCCH candidates whose number is adjusted based on the first upper limit are PDCCH candidates using a DCI format for single-slot scheduling, and the number is adjusted based on the second upper limit
  • the PDCCH candidates used are the PDCCH candidates using the DCI format for single-slot scheduling and the PDCCH candidates using the DCI format for multi-slot scheduling.
  • a fourth aspect of the present invention is a communication method used in a base station apparatus, the configuration of a search region including at least the number of PDCCH candidates for each period, offset, and aggregation level, transmitting RRC signaling indicating a configuration of a search region; configuring PDCCH candidates for each slot for a terminal device based on said RRC signaling indicating a plurality of said search region configurations; and said terminal device.
  • the PDCCH candidates whose number is grasped based on the first upper limit are PDCCH candidates using the DCI format for single-slot scheduling, and the number is grasped based on the second upper limit.
  • the PDCCH candidates used are the PDCCH candidates using the DCI format for single-slot scheduling and the PDCCH candidates using the DCI format for multi-slot scheduling.
  • a program that operates on the base station device 3 and the terminal device 1 according to one aspect of the present invention controls a CPU (Central Processing Unit) and the like so as to realize the functions of the above-described embodiments related to one aspect of the present invention. It may be a program (a program that causes a computer to function).
  • the information handled by these devices is temporarily stored in RAM (Random Access Memory) during processing, and then stored in various ROMs such as Flash ROM (Read Only Memory) and HDD (Hard Disk Drive). The data is read, modified, and written by the CPU in response to the request.
  • RAM Random Access Memory
  • ROMs Read Only Memory
  • HDD Hard Disk Drive
  • terminal device 1 and part of the base station device 3 in the above-described embodiment may be implemented by a computer.
  • a program for realizing this control function may be recorded in a computer-readable recording medium, and the program recorded in this recording medium may be read into a computer system and executed.
  • the “computer system” here is a computer system built into the terminal device 1 or the base station device 3, and includes hardware such as an OS and peripheral devices.
  • the term “computer-readable recording medium” refers to portable media such as flexible discs, magneto-optical discs, ROMs and CD-ROMs, and storage devices such as hard discs incorporated in computer systems.
  • “computer-readable recording medium” means a medium that dynamically stores a program for a short period of time, such as a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line. It may also include a volatile memory inside a computer system that serves as a server or client in that case, which holds the program for a certain period of time. Further, the program may be for realizing part of the functions described above, or may be capable of realizing the functions described above in combination with a program already recorded in the computer system.
  • the terminal device 1 may consist of at least one processor and at least one memory containing computer program instructions (computer program).
  • the memory and computer program instructions (computer program) may be configured to cause the terminal device 1 to perform the operations and processes described in the above embodiments using a processor.
  • the base station apparatus 3 may consist of at least one processor and at least one memory containing computer program instructions (computer programs).
  • the memory and computer program instructions (computer program) may be configured to cause the base station apparatus 3 to perform the operations and processes described in the above embodiments using a processor.
  • the base station device 3 in the above-described embodiment can be realized as an aggregate (device group) composed of a plurality of devices.
  • Each of the devices constituting the device group may include a part or all of each function or each functional block of the base station device 3 related to the above-described embodiments.
  • a device group may have a set of functions or functional blocks of the base station device 3 .
  • the terminal device 1 according to the above-described embodiments can communicate with a base station device as a group.
  • the base station device 3 in the above-described embodiment may be EUTRAN (Evolved Universal Terrestrial Radio Access Network) and/or NG-RAN (NextGen RAN, NR RAN). Also, the base station device 3 in the above-described embodiment may have some or all of the functions of an upper node for eNodeB and/or gNB.
  • part or all of the terminal device 1 and the base station device 3 in the above-described embodiments may be typically implemented as an LSI, which is an integrated circuit, or may be implemented as a chipset. Each functional block of the terminal device 1 and the base station device 3 may be individually chipped, or part or all of them may be integrated and chipped. Also, the method of circuit integration is not limited to LSI, but may be realized by a dedicated circuit or a general-purpose processor. In addition, when a technology for integrating circuits to replace LSIs emerges due to advances in semiconductor technology, it is possible to use an integrated circuit based on this technology.
  • a terminal device was described as an example of a communication device, but the present invention is not limited to this.
  • terminal devices or communication devices such as AV equipment, kitchen equipment, cleaning/washing equipment, air conditioning equipment, office equipment, vending machines, and other household equipment.
  • One aspect of the present invention is, for example, a communication system, a communication device (e.g., a mobile phone device, a base station device, a wireless LAN device, or a sensor device), an integrated circuit (e.g., a communication chip), or a program, etc. be able to.
  • a communication device e.g., a mobile phone device, a base station device, a wireless LAN device, or a sensor device
  • an integrated circuit e.g., a communication chip
  • a program etc. be able to.
  • terminal device 3 base station devices 10, 30 radio transmitting/receiving units 11, 31 antenna units 12, 32 RF units 13, 33 baseband units 14, 34 upper layer processing units 15, 35 medium access control layer Processing units 16 and 36 Radio resource control layer processing unit

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Abstract

Dans la présente invention, une première limite supérieure et un certain nombre de PDCCH candidats configurés sont utilisés pour ajuster un nombre de PDCCH candidats surveillés dans chaque intervalle, et une seconde limite supérieure et le nombre de PDCCH candidats ajusté sur la base de la première limite supérieure sont utilisés pour ajuster un nombre de PDCCH candidats surveillés dans de multiples intervalles.
PCT/JP2022/011214 2021-03-16 2022-03-14 Équipement terminal, dispositif de station de base et procédé de communication WO2022196611A1 (fr)

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