WO2020039482A1 - Équipement utilisateur, et procédé de communication radio - Google Patents

Équipement utilisateur, et procédé de communication radio Download PDF

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Publication number
WO2020039482A1
WO2020039482A1 PCT/JP2018/030669 JP2018030669W WO2020039482A1 WO 2020039482 A1 WO2020039482 A1 WO 2020039482A1 JP 2018030669 W JP2018030669 W JP 2018030669W WO 2020039482 A1 WO2020039482 A1 WO 2020039482A1
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WIPO (PCT)
Prior art keywords
harq
pusch
ack
transmission
uplink shared
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PCT/JP2018/030669
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English (en)
Japanese (ja)
Inventor
翔平 吉岡
一樹 武田
聡 永田
リフェ ワン
シャオツェン グオ
Original Assignee
株式会社Ｎｔｔドコモ
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Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to PCT/JP2018/030669 priority Critical patent/WO2020039482A1/fr
Publication of WO2020039482A1 publication Critical patent/WO2020039482A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control

Definitions

  • the present disclosure relates to a user terminal and a wireless communication method in a next-generation mobile communication system.
  • LTE Long Term Evolution
  • LTE-A LTE Advanced, LTE @ Rel. 10, 11, 12, 13
  • LTE @ Rel. 8, 9 LTE @ Rel. 8, 9
  • a user terminal transmits downlink control information (DCI) transmitted via a downlink control channel (for example, PDCCH: Physical @ Downlink @ Control @ Channel).
  • DCI downlink control information
  • a downlink control channel for example, PDCCH: Physical @ Downlink @ Control @ Channel
  • PDSCH Physical Downlink Shared Channel
  • the user terminal controls transmission of an uplink shared channel (for example, PUSCH: Physical Uplink Shared Channel) based on DCI (also referred to as UL grant or the like).
  • downlink (DL: Downlink) and uplink (UL: Uplink) communication is performed using 1 ms subframes (also referred to as a transmission time interval (TTI)).
  • TTI transmission time interval
  • HARQ Hybrid Automatic Repeat Request
  • an acknowledgment signal also referred to as HARQ-ACK, ACK / NACK, or A / N
  • a DL signal eg, PDSCH
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • an acknowledgment signal also called HARQ-ACK, ACK / NACK, or A / N
  • a DL signal eg, PDSCH
  • the timing is specified to the UE using DCI or the like. It is also assumed that the UE feeds back HARQ-ACK based on the codebook (in codebook units).
  • PUSCH uplink shared channel
  • a user terminal includes: a control unit configured to transmit the HARQ-ACK in the uplink shared channel based on the number of HARQ-ACKs (Hybrid Automatic Repeat reQuest-Acknowledgement) for downlink data. It is characterized by.
  • HARQ-ACKs Hybrid Automatic Repeat reQuest-Acknowledgement
  • transmission of an acknowledgment signal in an uplink shared channel can be appropriately controlled.
  • FIG. 1 is a diagram illustrating an example of HARQ-ACK piggyback in PUSCH repetitive transmission.
  • FIG. 2 is a diagram showing an example of A-CSI trigger timing and HARQ-ACK transmission timing.
  • FIG. 3 is a diagram showing an example of HARQ-ACK piggyback in PUSCH repetition transmission according to example 1.
  • FIG. 4 is a diagram showing an example of A-CSI trigger timing and HARQ-ACK transmission timing according to HARQ-ACK transmission method 1.
  • FIG. 5 is a diagram showing an example of A-CSI trigger timing and HARQ-ACK transmission timing according to HARQ-ACK transmission method 2.
  • FIG. 6 is a diagram illustrating an example of a schematic configuration of the wireless communication system according to the present embodiment.
  • FIG. 6 is a diagram illustrating an example of a schematic configuration of the wireless communication system according to the present embodiment.
  • FIG. 7 is a diagram showing an example of the overall configuration of the base station according to the present embodiment.
  • FIG. 8 is a diagram showing an example of a functional configuration of the base station according to the present embodiment.
  • FIG. 9 is a diagram showing an example of the overall configuration of the user terminal according to the present embodiment.
  • FIG. 10 is a diagram illustrating an example of a functional configuration of the user terminal according to the present embodiment.
  • FIG. 11 is a diagram illustrating an example of a hardware configuration of the base station and the user terminal according to the present embodiment.
  • the UE changes the HARQ-ACK codebook (which may be referred to as HARQ-ACK size) to semi-static or dynamic. A decision is being considered.
  • the base station notifies the UE of information indicating the method of determining the HARQ-ACK codebook (for example, information indicating whether the HARQ-ACK codebook is quasi-static or dynamic) using upper layer signaling. You may.
  • the HARQ-ACK codebook may be referred to as a PDSCH HARQ-ACK codebook.
  • the upper layer signaling may be, for example, any of RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information, or a combination thereof.
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • the MAC signaling may use, for example, a MAC control element (MAC CE (Control Element)), a MAC PDU (Protocol Data Unit), or the like.
  • the broadcast information includes, for example, a master information block (MIB: Master Information Block), a system information block (SIB: System Information Block), minimum system information (RMSI: Remaining Minimum System Information), and other system information (OSI: Other). System @ Information).
  • the UE is configured to semi-statically determine the HARQ-ACK codebook (or semi-static HARQ-ACK codebook) in a given cell, cell group (CG), or PUCCH group, etc.
  • the HARQ-ACK codebook determination may be referred to as a type-1 HARQ-ACK codebook determination.
  • the UE is configured to dynamically determine a HARQ-ACK codebook (or a dynamic HARQ-ACK codebook)
  • the determination of the HARQ-ACK codebook is referred to as a type 2 HARQ-ACK codebook determination. It may be.
  • the UE may determine the number of HARQ-ACK bits based on the configuration set by higher layer signaling.
  • the configured configuration may include, for example, the number (eg, maximum number, minimum number, etc.) of DL transmissions (eg, PDSCHs) scheduled over a range associated with the feedback timing of HARQ-ACK.
  • the range is also called an HARQ-ACK bundling window, an HARQ-ACK feedback window, a bundling window, a feedback window, and the like.
  • the bundling window may correspond to at least one of a space, a time, and a frequency.
  • the UE determines the type 2 (dynamic) HARQ-ACK codebook based on a bit string of a DL assignment index (DAI: Downlink @ Assignment @ Indicator (Index)) field included in downlink control information (eg, DL @ assignment).
  • DAI Downlink @ Assignment @ Indicator
  • the number of HARQ-ACK bits and the like may be determined using the above method.
  • the UE determines (generates) HARQ-ACK information bits based on the determined HARQ-ACK codebook, and transmits the generated HARQ-ACK to an uplink control channel (PUCCH: Physical ⁇ Uplink ⁇ Control ⁇ Channel) and an uplink shared channel (PUSCH). : Physical Uplink Shared Channel).
  • PUCCH Physical ⁇ Uplink ⁇ Control ⁇ Channel
  • PUSCH uplink shared channel
  • the base station may include information on the total number of DL data to be scheduled in the downlink control information used for the PDSCH scheduling instruction and transmit the information to the UE.
  • the base station may notify the DCI transmitted in each slot of the total number of DL data up to each slot.
  • the information on the total number of DL data to be scheduled corresponds to the total number of bits (or codebook size) of HARQ-ACK that is fed back by the UE.
  • Information on the total number of DL data to be scheduled may be referred to as total DAI (T-DAI, DL total DAI).
  • the DCI used for scheduling each PDSCH may include a counter DAI (C-DAI) in addition to the total DAI.
  • the counter DAI indicates an accumulated value of the scheduled data.
  • the counter DAI numbered in the order of the CC index may be included in the downlink control information of one or a plurality of CCs scheduled in a certain time unit (slot or subframe).
  • HARQ-ACK for DL data scheduled over a plurality of time units is fed back together (for example, when a band link window is configured with a plurality of slots), even if the counter DAI is applied over a plurality of time units. Good.
  • the counter DAI may be accumulated in the order of small CC index from the period of small slot index.
  • Total DAI indicates the total value (total number) of scheduled data.
  • the downlink control information of one or a plurality of CCs scheduled in a certain time unit may include the number of data to be scheduled. That is, the total DAI value included in the downlink control information transmitted in the same slot is the same.
  • HARQ-ACKs for DL data scheduled over a plurality of time units are collectively fed back (for example, when a band link window is composed of a plurality of slots)
  • the total DAI is over a plurality of time units. May be set.
  • the UE When a dynamic HARQ-ACK codebook is set by higher layer signaling or the like from the base station, the UE performs downlink control on the HARQ-ACK bit arrangement to be fed back (also referred to as HARQ-ACK bit order or A / N allocation order). Control may be performed based on the counter DAI included in the information.
  • the UE feeds back the discontinuous target (DL data) to the base station as NACK.
  • the retransmission control is appropriately performed even if the UE cannot recognize the missed CC itself by feeding back as NACK. Can be.
  • the order of the HARQ-ACK bits is determined based on the value of the counter DAI (counter DAI value). Further, the counter DAI value in a predetermined time unit (for example, PDCCH monitoring occasion) is determined based on a CC (or cell) index.
  • a first DCI format and a second DCI format are defined as DCI for scheduling DL transmission (for example, PDSCH).
  • the first DCI format and the second DCI format are defined with different contents and payload sizes.
  • the first DCI format may be referred to as DCI format 1_0, and the second DCI format may be referred to as DCI format 1_1.
  • DCI format 0_0 and DCI format 0_1 are defined as DCI for scheduling UL transmission (for example, PUSCH).
  • the counter DAI is included in both the first DCI format and the second DCI format, while the total DAI is included in one DCI format. Specifically, it is conceivable that the total DAI is not included in the first DCI format and the total DAI is included in the second DCI format.
  • the UE When the UE multiplexes the HARQ-ACK feedback on the PUSCH (configured-grant PUSCH) that is not scheduled by the DCI format or the PUSCH scheduled by the DCI format 0_0, the UE performs the same operation as the HARQ-ACK multiplexing on the PUCCH. It can be. That is, the 2-bit counter DAI is included in at least one of the first DCI format 1_0 and the second DCI format 1_1, while the 2-bit total DAI is included in one DCI format (for example, the second DCI format 1_1). May be included.
  • the 2-bit counter DAI is included in at least one of the first DCI format 1_0 and the second DCI format 1_1. It is. Further, the UE may use UL @ DAI (for example, the first two bits) included in DCI (for example, DCI format 0_1) for scheduling the PUSCH as the total DAI.
  • the second DCI format 1_1 may not include the total DAI.
  • the UE When the UE performs HARQ-ACK transmission using the dynamic HARQ-ACK codebook, the UE may perform transmission in units of transport blocks (TB) or in units of code blocks (CB).
  • TB transport blocks
  • CB code blocks
  • an HARQ-ACK codebook may be separately generated (a codebook and a sub-codebook are generated).
  • a 2-bit counter DAI is included in at least one of the first DCI format 1_0 and the second DCI format 1_1, and a 2-bit total DAI is included in one DCI format (for example, the second DCI format 1_1).
  • the first two bits of the total DAI in the UL direction are included in the DCI format 0_1 as the first subcodebook, and the next two bits of the total DAI in the UL direction are included in the DCI format 0_1 as the next subcodebook. Is also good.
  • the UE sets the timing from the reception of the PDSCH to the transmission of the HARQ-ACK corresponding to the PDSCH (PDSCH-to-ACK timing, which may be referred to as “K1”, etc.) in the DCI for scheduling the PDSCH. (They may be referred to as DL DCI, DL assignment, DCI format 1_0, DCI format 1_1, etc.).
  • the UE when detecting the DCI format 1_0, the UE, based on the “PDSCH to HARQ timing indication field (HARQ feedback timing information, PDSCH-to-HARQ-timing-indicator @ field)” included in the DCI, the HARQ-ACK corresponding to the PDSCH is transmitted in slot n + k (for example, k is an integer from 1 to 8) based on slot n including the last symbol of.
  • the UE Upon detecting the DCI format 1_1, the UE corresponds to the PDSCH in slot n + k based on the slot n including the last symbol of the PDSCH based on the “timing indication field from PDSCH to HARQ” included in the DCI.
  • Send HARQ-ACK the correspondence between k and the timing indication field may be set in the UE for each PUCCH (or PUCCH group or cell group) by higher layer signaling.
  • the correspondence is set by a parameter (may be called dl-DataToUL-ACK, Slot-timing-value-K1, etc.) included in a PUCCH configuration information element (PUCCH Config information element) of RRC signaling.
  • a parameter may be called dl-DataToUL-ACK, Slot-timing-value-K1, etc.
  • PUCCH Configur information element PUCCH Config information element
  • a plurality of candidate values for the PDSCH-to-ACK timing indication may be set by K1 by higher layer signaling, and one of the plurality of candidate values may be indicated by the DCI for PDSCH scheduling.
  • K1 may be set for each PUCCH group (or cell group). K1 may be a time determined based on a new melology (for example, SCS) of a channel (for example, PUCCH or PUSCH) for transmitting HARQ-ACK.
  • a new melology for example, SCS
  • a channel for example, PUCCH or PUSCH
  • the user terminal (UE) transmits a result measured based on the channel state measurement reference signal to the base station (which may be a network, an eNB, a gNB, a transmission / reception point, or the like) as channel state information (CSI) at a predetermined timing. give feedback.
  • the CSI may include at least one of a CQI (Channel Quality Indicator), a PMI (Precoding Matrix Indicator), and an RI (Rank Indicator).
  • the reference signal for channel state measurement may be a CSI-RS or an SS / PBCH (Synchronization Signal / Physical Broadcast CHannel) block (for example, a synchronization signal, an SSS (Secondary Synchronization Signal)).
  • SS / PBCH Synchronization Signal / Physical Broadcast CHannel
  • the CSI report includes a semi-persistent (Semi-persistent (Semi-persistent)) report in addition to a periodic CSI report (P (Periodic) -CSI report) and an aperiodic CSI report (A (Aperiodic) -CSI report).
  • P Period CSI report
  • A aperiodic CSI report
  • SP-CSI report the CSI report using the resource specified in the resource
  • UE When UE reports A-CSI, UE transmits A-CSI in response to a CSI trigger (CSI request) from the base station. For example, the UE performs an A-CSI report at a predetermined timing (for example, four subframes) after receiving the CSI trigger.
  • the A-CSI trigger is included in downlink control information (DCI: Downlink Control Information) transmitted using a downlink control channel (PDCCH: Physical Downlink Control Channel).
  • DCI including the A-CSI trigger is a UL grant, and is, for example, at least one of DCI formats 0_0 and 0_1.
  • the user terminal transmits the CSI using the PUSCH specified by the UL grant including the A-CSI trigger.
  • the PUSCH is also referred to as a PUSCH without a UL-SCH (PUSCH without UL-SCH).
  • UCI such as CSI using PUSCH
  • UL data for example, UL-SCH
  • the UE may multiplex the UCI on the PUSCH. Good.
  • the UE may piggyback the HARQ-ACK on the specific PUSCH.
  • the UE may transmit the HARQ-ACK codebook on one PUSCH in the PUSCH repetition transmission and the HARQ-ACK codebook on another PUSCH in the PUSCH repetition transmission.
  • UL @ DAI is 1 bit, indicating whether HARQ-ACK is piggybacked. If the UE has set a dynamic HARQ-ACK codebook, UL @ DAI is 2 bits, indicating the HARQ-ACK codebook size.
  • the UE receives DCI # 0 in slot # 0 and receives PDSCH # 0 based on DCI # 0.
  • DCI0 schedules PDSCH # 0 and indicates slot # 6 as HARQ-ACK feedback timing for PDSCH # 0.
  • the UE receives DCI # 1 in slot # 1, and receives PDSCH # 1 based on DCI # 1.
  • DCI # 1 schedules PDSCH # 1 and indicates slot # 8 as HARQ-ACK feedback timing for PDSCH # 1.
  • DCI # 3 schedules the PUSCH repetitive transmission consisting of PUSCH # 0 to # 3 in slots # 6 to # 9. Thereafter, the UE transmits PUSCHs # 0 to # 3 in slots # 6 to # 9 based on DCI # 3.
  • the UE piggybacks the HARQ-ACK codebook for PDSCH # 0 to PUSCH # 0 and piggybacks the HARQ-ACK codebook for PDSCH # 1 to PUSCH # 2.
  • UL @ DAI may indicate only the HARQ-ACK codebook on one PUSCH in the PUSCH repetition transmission.
  • the base station may not be able to correctly receive the HARQ-ACK codebook on the PUSCH repetitive transmission.
  • the base station cannot properly acquire HARQ-ACK because the number of HARQ-ACKs transmitted by the UE is different from the DL total DAI. .
  • the UE does not transmit the HARQ-ACK for the PDSCH after the A-CSI on the PUSCH is triggered on the PUSCH transmitting the A-CSI, and transmits the HARQ-ACK after the A-CSI. It is considered to be.
  • the UE receives the PDSCH in slots # 1, # 3 to # 5.
  • the UE receives DCI that triggers (schedules) A-CSI in slot # 12.
  • the UE transmits HARQ-ACK for the PDSCH in slots # 1, # 3 to # 5 based on K1.
  • the UE In slots # 8 to # 11, the UE receives the PDSCH. In slot # 12, the UE transmits A-CSI on PUSCH. In slots # 13 to # 15, the UE receives the PDSCH. In slot # 17, the UE transmits HARQ-ACK for the PDSCH in slots # 8 to # 15 based on K1.
  • the HARQ-ACK report after the A-CSI on the PUSCH is scheduled is delayed (latency is increased). If the HARQ-ACK report is delayed, system performance may be degraded.
  • the present inventors have conceived a method of appropriately controlling transmission of an acknowledgment signal (HARQ-ACK) in an uplink shared channel.
  • HARQ-ACK acknowledgment signal
  • Each aspect may be applied to a semi-static HARQ-ACK codebook, or may be applied to a dynamic HARQ-ACK codebook.
  • the DAI (UL DAI) in the DCI (UL DCI, UL grant, DCI format 0_0, 0_1) that schedules the PUSCH repetition transmission is based on the HARQ-ACK transmission on one PUSCH (specific PUSCH) in the PUSCH repetition transmission (
  • the HARQ-ACK may be piggybacked on a specific PUSCH, or the HARQ-ACK codebook size may be indicated.
  • the specific PUSCH may be a PUSCH that satisfies a predetermined condition among PUSCHs that carry HARQ-ACK in the PUSCH repetitive transmission.
  • the specific PUSCH may be the PUSCH having the earliest and smallest CC index among several PUSCHs carrying HARQ-ACK in the PUSCH repetition transmission. If the PUSCH repetition transmission is a repetition in the time direction, the specific PUSCH may be the earliest PUSCH among several PUSCHs carrying HARQ-ACK in the PUSCH repetition transmission. If the PUSCH repetition transmission is a repetition in the frequency direction, the PUSCH having the smallest CC index may be the PUSCH carrying several HARQ-ACKs in the PUSCH repetition transmission.
  • the specific PUSCH may be a PUSCH in which HARQ-ACK for a PDSCH having the earliest and smallest CC index among PUSCHs in the PUSCH repetition transmission is piggybacked.
  • the specific PUSCH may be a PUSCH in which HARQ-ACK based on the PDCCH having the earliest and smallest CC index among the PUSCHs in the PUSCH repetition transmission is piggybacked.
  • the DAI (DL total DAI) in the DCI (DL @ DCI, DL assignment, DCI format 1_0, 1_1) for scheduling the PDSCH may indicate the number of PDSCHs (the number of HARQ-ACKs) to be scheduled.
  • the UE may perform HARQ-ACK piggybacking on a specific PUSCH (presence of HARQ-ACK piggybacking, HARQ-ACK codebook). (At least one of the sizes) may be controlled.
  • the UE can determine the HARQ-ACK transmission on the specific PUSCH based on the UL @ DAI even when the reception of the DL @ DAI corresponding to the specific PUSCH has failed, and the base station appropriately transmits the HARQ-ACK. Can receive.
  • the UE may map the HARQ-ACK to a resource obtained by rate matching of UL data on the PUSCH.
  • the PUSCH rate matching process refers to controlling the number of encoded bits (encoded bits) in consideration of actually available radio resources. If the number of coded bits is smaller than the number of bits that can be mapped to actually available radio resources, at least some of the coded bits may be repeated. If the number of coded bits is larger than the number of bits that can be mapped, a part of the coded bits may be deleted.
  • the UE may multiplex the UCI on PUSCH by puncturing PUSCH.
  • the UE may multiplex the UCI on the PUSCH by PUSCH rate matching.
  • N may be 2 or another integer.
  • the PUSCH puncturing process performs encoding on the assumption that resources allocated for PUSCH can be used (or does not consider the amount of unavailable resources), but does not map encoded symbols to resources that are not actually available. (To free up resources).
  • On the receiving side by not using the coded symbols of the punctured resources for decoding, it is possible to suppress characteristic degradation due to puncturing.
  • the timings of DCI # 0, # 1, PDSCH # 0, # 1, PUSCH # 0 to PUSCH # 3 are the same as those in FIG. Also, it is assumed that the UE has set a dynamic HARQ-ACK codebook.
  • the DL total DAI in DCI # 0 indicates 1 as the number of HARQ-ACKs transmitted on PUSCH # 0.
  • the DL total DAI in DCI # 1 indicates 1 as the number of HARQ-ACKs transmitted on PUSCH # 1.
  • the specific PUSCH is PUSCH # 0 of slot # 6.
  • UL @ DAI in DCI # 2 indicates 1 as the number of HARQ-ACK codebooks piggybacked on PUSCH # 0.
  • the UE performs puncturing of the PUSCH # 0 according to the HARQ-ACK scheduling timing in the DCI # 0 and the DL total DAI and the UL DAI of the DCI # 2, and stores the HARQ-ACK codebook for the PDSCH # 0 on the PUSCH # 0. To piggyback.
  • the UE performs puncturing of PUSCH # 0 according to the HARQ-ACK scheduling timing in DCI # 1 and DL total DAI, and piggybacks the HARQ-ACK codebook for PDSCH # 1 on PUSCH # 2.
  • the UE When the UE performs rate matching of a specific PUSCH in the PUSCH repetitive transmission, the UE performs one of the following aspects 1-1 and 1-2 on PUSCHs (non-specific PUSCH) other than the specific PUSCH in the PUSCH repetitive transmission. You may follow one.
  • the UE uses a PUSCH (non-specific PUSCH) other than the specific PUSCH in the PUSCH repetition transmission, UL data rate matching need not be performed.
  • the UE may not perform the rate matching of UL data in the non-specific PUSCH regardless of whether or not the non-specific PUSCH is at the HARQ-ACK feedback timing.
  • the UE may transmit the HARQ-ACK in the PUSCH repetition transmission according to one of the following aspects 1-1-1 and 1-1-2.
  • the UE may piggyback HARQ-ACK up to N bits on the non-specific PUSCH in the PUSCH repetitive transmission. In other words, piggybacking HARQ-ACK of up to N bits on the non-specific PUSCH in the PUSCH repetitive transmission may be allowed. N may be 2 or another integer.
  • the UE may multiplex up to N bits of HARQ-ACK on the non-specific PUSCH by puncturing UL data on the non-specific PUSCH.
  • the UE may obtain HARQ-ACK piggyback in the non-specific PUSCH (at least one of HARQ-ACK piggyback, HARQ-ACK codebook size). May be controlled.
  • the UE may drop the HARQ-ACK, or may be the (next) after the non-specific PUSCH. It may be piggybacked on the PUSCH.
  • PUSCH UL data may be rate-matched.
  • the base station may decode the PUSCH assuming this UE operation.
  • the base station assumes that the HARQ-ACK codebook resources are punctured, and the HARQ-ACK code PUSCH can be decoded without using book resources.
  • the base station can appropriately receive UL data and HARQ-ACK by processing puncturing of UL data in the non-specific PUSCH based on the DL DAI and the predetermined number N.
  • the UE since the UE does not have to be notified of the HARQ-ACK piggybacked on the non-specific PUSCH except in DL DCI, it is possible to suppress overhead.
  • the reception performance of the PUSCH can be ensured.
  • the base station assumes that HARQ-ACK is piggybacked on the non-specific PUSCH based on the DL total DAI, UL data and HARQ-ACK can be decoded.
  • the UE controls HARQ-ACK piggyback (at least one of HARQ-ACK piggyback, HARQ-ACK codebook size) on the non-specific PUSCH based on the DL DAI (DL total DAI) in the DL DCI. You may.
  • the UE may multiplex HARQ-ACK on the non-specific PUSCH by rate matching UL data on the non-specific PUSCH. If the HARQ-ACK codebook size piggybacked on one non-specific PUSCH is N bits or less, the UE may multiplex HARQ-ACK on the non-specific PUSCH by puncturing UL data on the non-specific PUSCH. Good.
  • the base station can appropriately receive UL data and HARQ-ACK by processing rate matching or puncturing of UL data in the non-specific PUSCH based on the DL total DAI.
  • the UE may repeat the PUSCH rate matching.
  • the UE may perform the rate matching of the UL data in the non-specific PUSCH according to the presence / absence of the rate matching of the UL data in the specific PUSCH. For example, when performing rate matching of UL data on a specific PUSCH, the UE may perform rate matching of UL data on a non-specific PUSCH in the same manner as the specific PUSCH. The UE may perform rate matching on resources in the non-specific PUSCH corresponding to the resources for rate matching in the specific PUSCH (with the same pattern and size as the rate matching on the specific PUSCH).
  • the UE may piggyback the HARQ-ACK codebook up to the HARQ-ACK codebook size (the number of HARQ-ACK bits) piggybacked on the specific PUSCH on the non-specific PUSCH in the PUSCH repetitive transmission.
  • the UE may multiplex HARQ-ACK of up to N bits on the non-specific PUSCH by performing rate matching on the non-specific PUSCH, similarly to the rate matching on the specific PUSCH.
  • the base station can appropriately receive UL data and HARQ-ACK in the non-specific PUSCH by processing the rate matching of the non-specific PUSCH in the same manner as the processing for the rate matching of the specific PUSCH.
  • the UE may apply aspect 1 if the PUSCH repetition transmission is scheduled according to DCI format 0_1.
  • the UE may piggyback any HARQ-ACK on any PUSCH in the PUSCH repetition transmission. You may back.
  • the configuration grant PUSCH may be a PUSCH (type 1) configured by an upper layer signalling, or may be a DCI scrambled by a CRC (Cyclic Redundancy Check) in CS (Configured Scheduling) -RNTI. , At least one of activation, deactivation, and retransmission of PUSCH transmission in a predetermined cycle may be controlled. In dynamic grant-based transmission (initial transmission or retransmission), scheduling may be controlled by DCI that is CRC-scrambled by C-RNTI.
  • the UE can appropriately transmit HARQ-ACK depending on the DCI format and whether or not it is the configuration grant PUSCH.
  • the UE may piggyback up to N bits of HARQ-ACK to a specific PUSCH.
  • piggybacking HARQ-ACK of up to N bits on the PUSCH (specific PUSCH) transmitting A-CSI may be allowed.
  • N may be 2 or another integer.
  • the UE may piggyback HARQ-ACK up to N bits on the specific PUSCH by puncturing the specific PUSCH.
  • the UE may piggyback the HARQ-ACK on the specific PUSCH according to one of the following HARQ-ACK transmission methods 1 and 2.
  • the HARQ-ACK codebook piggybacked on a specific PUSCH may include a HARQ-ACK for the PDSCH scheduled by DCI that triggers A-CSI.
  • the PDSCH timing, A-CSI trigger timing, and A-CSI reporting timing are the same as those in FIG.
  • N is 2.
  • the UE In slots # 1, # 3 to # 5, the UE receives the PDSCH.
  • slot # 6 the UE receives the DCI and the PDSCH scheduled by the DCI.
  • the DCI triggers an A-CSI report in slot # 12 (specific PUSCH), and indicates the same slot # 12 as HARQ-ACK feedback timing for the PDSCH.
  • the UE transmits HARQ-ACK for PDSCH in slots # 1, # 3 to # 5.
  • the UE receives the DCI and the PDSCH scheduled by the DCI.
  • the DCI indicates slot # 12 as HARQ-ACK feedback timing for the PDSCH.
  • the UE receives the DCI and the PDSCH scheduled by the DCI.
  • the UE transmits an A-CSI report on the PUSCH, and also transmits an HARQ-ACK codebook for the PDSCH in slot # 6 and the PDSCH in slot # 8.
  • the UE receives the DCI and the PDSCH scheduled by the DCI.
  • the UE piggybacks the HARQ-ACK codebook for the PDSCH in slots # 9 to # 15 on the PUSCH.
  • the HARQ-ACK codebook piggybacked on a specific PUSCH includes a first HARQ-ACK codebook (or sub-codebook) for a PDSCH scheduled by a DCI that triggers A-CSI, and a second HARQ-ACK for other PDSCHs. And a codebook (or sub-codebook).
  • the second HARQ-ACK codebook may include the HARQ-ACK for the PDSCH after the A-CSI trigger.
  • the HARQ-ACK feedback timing for the PDSCH in slot # 9 is different from that in FIG.
  • the UE piggybacks the first HARQ-ACK codebook and the second HARQ-ACK codebook on the PUSCH in slot # 12 (specific PUSCH).
  • the first HARQ-ACK codebook may be a HARQ-ACK for the PDSCH in slot # 6 at which A-CSI is triggered.
  • the second HARQ-ACK codebook may be an HARQ-ACK codebook for the PDSCH in slot # 8 and the PDSCH in slot # 9.
  • the UE piggybacks the HARQ-ACK codebook for the PDSCH in slots # 10 to # 15 to the PUSCH.
  • the base station may determine the HARQ-ACK timing according to one of HARQ-ACK transmission methods 1 and 2, and may instruct by the DCI to schedule the PDSCH.
  • the UE piggybacks the N-bit HARQ-ACK on the specific PUSCH and simultaneously transmits the N-bit HARQ-ACK.
  • the HARQ-ACK not piggybacked on the specific PUSCH may be dropped, or the HARQ-ACK may be piggybacked on the (next) PUSCH after the specific PUSCH.
  • the UE can piggyback the A-CSI and the HARQ-ACK on the PUSCH, thereby improving the HARQ-ACK latency.
  • Wireless communication system Hereinafter, the configuration of the wireless communication system according to the present embodiment will be described.
  • communication is performed using at least one combination of the above-described plurality of aspects.
  • FIG. 6 is a diagram showing an example of a schematic configuration of the wireless communication system according to the present embodiment.
  • carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a unit of a system bandwidth (for example, 20 MHz) of an LTE system are applied. can do.
  • DC dual connectivity
  • the wireless communication system 1 includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G. (5th generation mobile communication system), NR (New Radio), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., or a system for realizing these.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-B LTE-Beyond
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • NR New Radio
  • FRA Full Radio Access
  • New-RAT Radio Access Technology
  • the wireless communication system 1 includes a base station 11 forming a macro cell C1 having relatively wide coverage, and a base station 12 (12a to 12c) arranged in the macro cell C1 and forming a small cell C2 smaller than the macro cell C1.
  • a base station 11 forming a macro cell C1 having relatively wide coverage
  • a base station 12 (12a to 12c) arranged in the macro cell C1 and forming a small cell C2 smaller than the macro cell C1.
  • user terminals 20 are arranged in the macro cell C1 and each small cell C2.
  • the arrangement, number, and the like of each cell and the user terminals 20 are not limited to the modes shown in the figure.
  • the user terminal 20 can be connected to both the base station 11 and the base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 simultaneously using CA or DC. In addition, the user terminal 20 may apply CA or DC using a plurality of cells (CCs) (for example, five or less CCs and six or more CCs).
  • CCs cells
  • Communication between the user terminal 20 and the base station 11 can be performed using a carrier having a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth (also referred to as an existing carrier or a legacy carrier).
  • a carrier having a relatively high frequency band for example, 3.5 GHz, 5 GHz, or the like
  • a wide bandwidth may be used, or between the user terminal 20 and the base station 11.
  • the same carrier as described above may be used. Note that the configuration of the frequency band used by each base station is not limited to this.
  • the user terminal 20 can perform communication using time division duplex (TDD: Time Division Duplex) and / or frequency division duplex (FDD: Frequency Division Duplex) in each cell.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • a single numerology may be applied, or a plurality of different numerologies may be applied.
  • Numerology may be a communication parameter applied to transmission and / or reception of a certain signal and / or channel, for example, subcarrier interval, bandwidth, symbol length, cyclic prefix length, subframe length. , TTI length, number of symbols per TTI, radio frame configuration, filtering process, windowing process, and the like.
  • the base station 11 and the base station 12 may be connected by wire (for example, an optical fiber or an X2 interface compliant with CPRI (Common Public Radio Interface)) or wirelessly. Good.
  • wire for example, an optical fiber or an X2 interface compliant with CPRI (Common Public Radio Interface)
  • CPRI Common Public Radio Interface
  • the base station 11 and each base station 12 are respectively connected to the upper station apparatus 30, and are connected to the core network 40 via the upper station apparatus 30.
  • the higher station apparatus 30 includes, for example, an access gateway apparatus, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto.
  • RNC radio network controller
  • MME mobility management entity
  • each base station 12 may be connected to the higher station apparatus 30 via the base station 11.
  • the base station 11 is a base station having relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like.
  • the base station 12 is a base station having local coverage, such as a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), a transmission / reception point, and the like. May be called.
  • the base stations 11 and 12 are not distinguished, they are collectively referred to as a base station 10.
  • Each user terminal 20 is a terminal corresponding to various communication systems such as LTE and LTE-A, and may include not only mobile communication terminals (mobile stations) but also fixed communication terminals (fixed stations).
  • Orthogonal Frequency Division Multiple Access (OFDMA) is applied to the downlink as a wireless access method, and Single Carrier-Frequency Division Multiple Access (SC-FDMA: Single Carrier) is applied to the uplink. Frequency Division Multiple Access) and / or OFDMA is applied.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier-Frequency Division Multiple Access
  • OFDMA is a multicarrier transmission scheme in which a frequency band is divided into a plurality of narrow frequency bands (subcarriers), and data is mapped to each subcarrier for communication.
  • the SC-FDMA divides a system bandwidth into bands constituted by one or continuous resource blocks for each terminal, and a single carrier transmission that reduces interference between terminals by using different bands for a plurality of terminals. It is a method.
  • the uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.
  • a downlink shared channel (PDSCH: Physical Downlink Shared Channel), a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel, and the like shared by each user terminal 20 are used. Used.
  • the PDSCH transmits user data, upper layer control information, SIB (System @ Information @ Block), and the like. Also, MIB (Master ⁇ Information ⁇ Block) is transmitted by PBCH.
  • SIB System @ Information @ Block
  • MIB Master ⁇ Information ⁇ Block
  • Downlink L1 / L2 control channels include downlink control channels (PDCCH (Physical Downlink Control Channel) and / or EPDCCH (Enhanced Physical Downlink Control Channel)), PCFICH (Physical Control Format Indicator Channel), and PHICH (Physical Hybrid-ARQ Indicator Channel).
  • PDCH Physical Downlink Control Channel
  • EPDCCH Enhanced Physical Downlink Control Channel
  • PCFICH Physical Control Format Indicator Channel
  • PHICH Physical Hybrid-ARQ Indicator Channel
  • DCI Downlink Control Information
  • DCI Downlink Control Information
  • the scheduling information may be notified by DCI.
  • a DCI that schedules DL data reception may be called a DL assignment
  • a DCI that schedules UL data transmission may be called an UL grant.
  • PCFICH transmits the number of OFDM symbols used for PDCCH.
  • the PHICH transmits acknowledgment information (eg, retransmission control information, HARQ-ACK, ACK / NACK, etc.) of HARQ (Hybrid Automatic Repeat Repeat reQuest) to the PUSCH.
  • the EPDCCH is frequency-division multiplexed with the PDSCH (Downlink Shared Data Channel), and is used for transmission of DCI and the like like the PDCCH.
  • an uplink shared channel (PUSCH: Physical Uplink Shared Channel), an uplink control channel (PUCCH: Physical Uplink Control Channel), and a random access channel (PRACH: Physical Random Access Channel) or the like is used.
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PRACH Physical Random Access Channel
  • the PUCCH transmits downlink radio link quality information (CQI: Channel Quality Indicator), delivery confirmation information, scheduling request (SR: Scheduling Request), and the like.
  • CQI Channel Quality Indicator
  • SR Scheduling Request
  • the PRACH transmits a random access preamble for establishing a connection with a cell.
  • a cell-specific reference signal CRS: Cell-specific Reference Signal
  • CSI-RS Channel State Information-Reference Signal
  • DMRS Demodulation Reference Signal
  • PRS Positioning Reference Signal
  • a reference signal for measurement SRS: Sounding Reference Signal
  • DMRS reference signal for demodulation
  • the DMRS may be called a user terminal specific reference signal (UE-specific Reference Signal). Further, the transmitted reference signal is not limited to these.
  • FIG. 7 is a diagram showing an example of the overall configuration of the base station according to the present embodiment.
  • the base station 10 includes a plurality of transmitting / receiving antennas 101, an amplifier unit 102, a transmitting / receiving unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106.
  • the transmitting / receiving antenna 101, the amplifier unit 102, and the transmitting / receiving unit 103 may be configured to include at least one each.
  • the baseband signal processing unit 104 regarding user data, processing of a PDCP (Packet Data Convergence Protocol) layer, division / combination of user data, transmission processing of an RLC layer such as RLC (Radio Link Control) retransmission control, and MAC (Medium Access) Control) Transmission / reception control (for example, HARQ transmission processing), scheduling, transmission format selection, channel coding, inverse fast Fourier transform (IFFT) processing, precoding processing, etc., and transmission / reception processing are performed.
  • RLC Radio Link Control
  • MAC Medium Access
  • Transmission / reception control for example, HARQ transmission processing
  • scheduling transmission format selection, channel coding, inverse fast Fourier transform (IFFT) processing, precoding processing, etc.
  • IFFT inverse fast Fourier transform
  • the transmission / reception unit 103 converts the baseband signal precoded and output from the baseband signal processing unit 104 for each antenna into a radio frequency band, and transmits the radio frequency band.
  • the radio frequency signal frequency-converted by the transmitting / receiving section 103 is amplified by the amplifier section 102 and transmitted from the transmitting / receiving antenna 101.
  • the transmission / reception unit 103 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present disclosure. Note that the transmission / reception unit 103 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.
  • a radio frequency signal received by the transmission / reception antenna 101 is amplified by the amplifier unit 102.
  • the transmitting / receiving section 103 receives the upstream signal amplified by the amplifier section 102.
  • Transmitting / receiving section 103 frequency-converts the received signal into a baseband signal and outputs the baseband signal to baseband signal processing section 104.
  • the baseband signal processing unit 104 performs fast Fourier transform (FFT: Fast Fourier Transform), inverse discrete Fourier transform (IDFT), and error correction on user data included in the input uplink signal. Decoding, reception processing of MAC retransmission control, reception processing of the RLC layer and PDCP layer are performed, and the data is transferred to the upper station apparatus 30 via the transmission path interface 106.
  • the call processing unit 105 performs call processing (setting, release, etc.) of a communication channel, state management of the base station 10, management of radio resources, and the like.
  • the transmission path interface 106 transmits and receives signals to and from the higher-level station device 30 via a predetermined interface.
  • the transmission line interface 106 transmits and receives signals (backhaul signaling) to and from another base station 10 via an interface between base stations (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface). Is also good.
  • the transmission / reception section 103 may further include an analog beamforming section that performs analog beamforming.
  • the analog beamforming unit includes an analog beamforming circuit (for example, a phase shifter, a phase shift circuit) or an analog beamforming device (for example, a phase shifter) described based on common recognition in the technical field according to the present invention. can do.
  • the transmission / reception antenna 101 can be configured by, for example, an array antenna.
  • the transmission / reception unit 103 is configured to be able to apply single BF and multi BF.
  • the transmitting / receiving section 103 transmits a downlink (DL) signal (including at least one of a DL data signal (downlink shared channel), a DL control signal (downlink control channel), and a DL reference signal) to the user terminal 20. And receives an uplink (UL) signal (including at least one of a UL data signal, a UL control signal, and a UL reference signal) from the user terminal 20.
  • DL downlink
  • DL control signal downlink control channel
  • UL uplink
  • the transmission / reception section 103 may transmit downlink control information used for scheduling of the downlink shared channel, and may receive an acknowledgment signal for the downlink shared channel.
  • FIG. 8 is a diagram showing an example of a functional configuration of the base station according to the present embodiment.
  • functional blocks of characteristic portions in the present embodiment are mainly shown, and it may be assumed that base station 10 also has other functional blocks necessary for wireless communication.
  • the baseband signal processing unit 104 includes at least a control unit (scheduler) 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305. Note that these configurations need only be included in base station 10, and some or all of the configurations need not be included in baseband signal processing section 104.
  • the control unit (scheduler) 301 controls the entire base station 10.
  • the control unit 301 can be configured from a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present disclosure.
  • the control unit 301 controls, for example, signal generation in the transmission signal generation unit 302, signal assignment in the mapping unit 303, and the like. Further, the control unit 301 controls a signal reception process in the reception signal processing unit 304, a signal measurement in the measurement unit 305, and the like.
  • the control unit 301 performs scheduling (for example, resource transmission) of system information, a downlink data signal (for example, a signal transmitted on the PDSCH), and a downlink control signal (for example, a signal transmitted on the PDCCH and / or the EPDCCH; acknowledgment information and the like). Quota). Further, control section 301 controls generation of a downlink control signal, a downlink data signal, and the like based on a result of determining whether or not retransmission control is required for an uplink data signal.
  • scheduling for example, resource transmission
  • a downlink data signal for example, a signal transmitted on the PDSCH
  • a downlink control signal for example, a signal transmitted on the PDCCH and / or the EPDCCH; acknowledgment information and the like. Quota
  • control section 301 controls generation of a downlink control signal, a downlink data signal, and the like based on a result of determining whether or not retransmission control is required for an uplink data signal.
  • Transmission signal generation section 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) based on an instruction from control section 301, and outputs the generated signal to mapping section 303.
  • the transmission signal generation unit 302 can be configured from a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present disclosure.
  • the transmission signal generation unit 302 generates a DL assignment for notifying downlink data allocation information and / or a UL grant for notifying uplink data allocation information, based on an instruction from the control unit 301, for example.
  • the DL assignment and the UL grant are both DCI and follow the DCI format.
  • the downlink data signal is subjected to an encoding process, a modulation process, and the like according to an encoding rate, a modulation scheme, and the like determined based on channel state information (CSI: Channel ⁇ State ⁇ Information) from each user terminal 20 and the like.
  • CSI Channel ⁇ State ⁇ Information
  • Mapping section 303 maps the downlink signal generated by transmission signal generation section 302 to a predetermined radio resource based on an instruction from control section 301, and outputs the result to transmission / reception section 103.
  • the mapping unit 303 can be configured by a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present disclosure.
  • the reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, and decoding) on the reception signal input from the transmission / reception unit 103.
  • the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20.
  • the reception signal processing unit 304 can be configured from a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present disclosure.
  • the reception signal processing unit 304 outputs the information decoded by the reception processing to the control unit 301. For example, when a PUCCH including HARQ-ACK is received, HARQ-ACK is output to control section 301. Further, the reception signal processing unit 304 outputs the reception signal and / or the signal after the reception processing to the measurement unit 305.
  • the measurement unit 305 performs measurement on the received signal.
  • the measurement unit 305 can be configured from a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present disclosure.
  • the measurement unit 305 may perform RRM (Radio Resource Management) measurement, CSI (Channel State Information) measurement, or the like based on the received signal.
  • Measuring section 305 receives power (for example, RSRP (Reference Signal Received Power)), reception quality (for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio), SNR (Signal to Noise Ratio)).
  • Power for example, RSRP (Reference Signal Received Power)
  • reception quality for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio), SNR (Signal to Noise Ratio)
  • Signal strength for example, RSSI (Received Signal Strength Indicator)
  • channel information for example, CSI
  • the measurement result may be output to the control unit 301.
  • FIG. 9 is a diagram showing an example of the overall configuration of the user terminal according to the present embodiment.
  • the user terminal 20 includes a plurality of transmitting / receiving antennas 201, an amplifier unit 202, a transmitting / receiving unit 203, a baseband signal processing unit 204, and an application unit 205.
  • the transmitting / receiving antenna 201, the amplifier unit 202, and the transmitting / receiving unit 203 may be configured to include at least one each.
  • the radio frequency signal received by the transmitting / receiving antenna 201 is amplified by the amplifier unit 202.
  • the transmission / reception unit 203 receives the downlink signal amplified by the amplifier unit 202.
  • the transmitting / receiving section 203 converts the frequency of the received signal into a baseband signal and outputs the baseband signal to the baseband signal processing section 204.
  • the transmission / reception unit 203 can be configured from a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present disclosure. Note that the transmission / reception unit 203 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.
  • the baseband signal processing unit 204 performs FFT processing, error correction decoding, reception processing for retransmission control, and the like on the input baseband signal.
  • the downlink user data is transferred to the application unit 205.
  • the application unit 205 performs processing related to layers higher than the physical layer and the MAC layer. Also, of the downlink data, broadcast information may be transferred to the application unit 205.
  • uplink user data is input from the application unit 205 to the baseband signal processing unit 204.
  • the baseband signal processor 204 performs retransmission control transmission processing (eg, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like, and performs transmission / reception processing. Transferred to 203.
  • the transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits the radio frequency band.
  • the radio frequency signal frequency-converted by the transmitting / receiving section 203 is amplified by the amplifier section 202 and transmitted from the transmitting / receiving antenna 201.
  • the transmission / reception unit 203 may further include an analog beamforming unit that performs analog beamforming.
  • the analog beamforming unit includes an analog beamforming circuit (for example, a phase shifter, a phase shift circuit) or an analog beamforming device (for example, a phase shifter) described based on common recognition in the technical field according to the present invention. can do.
  • the transmission / reception antenna 201 can be configured by, for example, an array antenna.
  • the transmission / reception unit 203 is configured so that a single BF and a multi BF can be applied.
  • the transmitting / receiving section 203 receives a downlink (DL) signal (including at least one of a DL data signal (downlink shared channel), a DL control signal (downlink control channel), and a DL reference signal) from the base station 10,
  • DL downlink
  • DL control signal downlink control channel
  • UL uplink
  • the transmission / reception unit 203 may receive the downlink shared channel scheduled by the downlink control information and transmit an acknowledgment signal for the downlink shared channel.
  • the transmitting / receiving section 203 may transmit the uplink shared channel scheduled by the downlink control information.
  • FIG. 10 is a diagram showing an example of a functional configuration of the user terminal according to the present embodiment. Note that, in this example, functional blocks of characteristic portions in the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication.
  • the baseband signal processing unit 204 of the user terminal 20 includes at least a control unit 401, a transmission signal generation unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405. Note that these configurations need only be included in the user terminal 20, and some or all of the configurations need not be included in the baseband signal processing unit 204.
  • the control unit 401 controls the entire user terminal 20.
  • the control unit 401 can be configured from a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present disclosure.
  • the control unit 401 controls, for example, signal generation in the transmission signal generation unit 402, signal assignment in the mapping unit 403, and the like. Further, the control unit 401 controls a signal reception process in the reception signal processing unit 404, a signal measurement in the measurement unit 405, and the like.
  • the control unit 401 acquires the downlink control signal and the downlink data signal transmitted from the base station 10 from the reception signal processing unit 404.
  • the control unit 401 controls generation of an uplink control signal and / or an uplink data signal based on a result of determining whether or not retransmission control is required for a downlink control signal and / or a downlink data signal.
  • Transmission signal generation section 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) based on an instruction from control section 401 and outputs the generated signal to mapping section 403.
  • the transmission signal generation unit 402 can be configured from a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present disclosure.
  • the transmission signal generation unit 402 generates an uplink control signal related to acknowledgment information, channel state information (CSI), and the like based on an instruction from the control unit 401, for example. Further, transmission signal generating section 402 generates an uplink data signal based on an instruction from control section 401. For example, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal when the downlink control signal notified from the base station 10 includes a UL grant.
  • CSI channel state information
  • Mapping section 403 maps the uplink signal generated by transmission signal generation section 402 to a radio resource based on an instruction from control section 401, and outputs the result to transmission / reception section 203.
  • the mapping unit 403 can be configured from a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present disclosure.
  • the reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, and decoding) on the reception signal input from the transmission / reception unit 203.
  • the received signal is, for example, a downlink signal (a downlink control signal, a downlink data signal, a downlink reference signal, etc.) transmitted from the base station 10.
  • the reception signal processing unit 404 can be configured from a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present disclosure.
  • the reception signal processing unit 404 can configure a reception unit according to the present disclosure.
  • the reception signal processing unit 404 outputs the information decoded by the reception processing to the control unit 401.
  • the reception signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401. Further, the reception signal processing unit 404 outputs the reception signal and / or the signal after the reception processing to the measurement unit 405.
  • the measuring unit 405 measures the received signal.
  • the measurement unit 405 can be configured from a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present disclosure.
  • the measurement unit 405 may perform RRM measurement, CSI measurement, and the like based on the received signal.
  • the measurement unit 405 may measure reception power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), and channel information (for example, CSI).
  • the measurement result may be output to the control unit 401.
  • the control unit 401 also determines the number of HARQ-ACKs (Hybrid Automatic Repeat Repeat reQuest-Acknowledgement) for the downlink data (PDSCH) (HARQ-ACK codebook size, UL DAI, DL total DAI, HARQ-ACK feedback timing in the same slot).
  • the HARQ-ACK may be transmitted on the uplink shared channel (PUSCH, specific PUSCH, non-specific PUSCH) based on a certain number of HARQ-ACKs.
  • the number of HARQ-ACKs transmitted on one specific uplink shared channel (specific PUSCH) satisfying a predetermined condition among a plurality of uplink shared channels transmitted by repetitive transmission (PUSCH repetitive transmission) is determined by the scheduling of the repetitive transmission. May be based on the downlink assignment index (DAI, UL @ DAI, DL total DAI) included in the downlink control information for the PDL.
  • DAI downlink assignment index
  • control section 401 performs rate matching on the specific uplink shared channel, and does not need to perform rate matching on an uplink shared channel (non-specific PUSCH) other than the specific uplink shared channel among the plurality of uplink shared channels. Good.
  • the control unit 401 may perform rate matching on the specific uplink shared channel and perform rate matching on uplink shared channels other than the specific uplink shared channel among the plurality of uplink shared channels.
  • the uplink shared channel may be an uplink shared channel for transmitting an aperiodic channel state information report (A-CSI).
  • the control unit 401 may transmit HARQ-ACKs up to a predetermined number (N, UL DAI) on the uplink shared channel.
  • each functional block may be realized using one device physically or logically coupled, or directly or indirectly (for example, two or more devices physically or logically separated from each other). , Wired, wireless, etc.), and may be implemented using these multiple devices.
  • the functional block may be realized by combining one device or the plurality of devices with software.
  • the functions include judgment, determination, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
  • a functional block (configuration unit) that causes transmission to function may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
  • the realization method is not particularly limited.
  • a base station, a user terminal, or the like may function as a computer that performs processing of the wireless communication method according to the present disclosure.
  • FIG. 11 is a diagram illustrating an example of a hardware configuration of the base station and the user terminal according to the embodiment.
  • the above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. .
  • the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices illustrated in the drawing, or may be configured to exclude some of the devices.
  • processor 1001 may be implemented by one or more chips.
  • the functions of the base station 10 and the user terminal 20 are performed, for example, by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002 so that the processor 1001 performs an arithmetic operation and communicates via the communication device 1004. And controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
  • predetermined software program
  • the processor 1001 performs an arithmetic operation and communicates via the communication device 1004.
  • the processor 1001 controls the entire computer by operating an operating system, for example.
  • the processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
  • CPU Central Processing Unit
  • the above-described baseband signal processing unit 104 (204), call processing unit 105, and the like may be realized by the processor 1001.
  • the processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to these.
  • a program program code
  • a program that causes a computer to execute at least a part of the operation described in the above embodiment is used.
  • the control unit 401 of the user terminal 20 may be implemented by a control program stored in the memory 1002 and operated by the processor 1001, and other functional blocks may be implemented similarly.
  • the memory 1002 is a computer-readable recording medium, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically EPROM), RAM (Random Access Memory), and other appropriate storage media. It may be constituted by one.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to an embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc) ROM, etc.), a digital versatile disc, At least one of a Blu-ray (registered trademark) disk, a removable disk, a hard disk drive, a smart card, a flash memory device (eg, a card, a stick, a key drive), a magnetic stripe, a database, a server, and other suitable storage media. May be configured.
  • the storage 1003 may be called an auxiliary storage device.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, for example, in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). May be configured.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmission / reception antenna 101 (201), the amplifier unit 102 (202), the transmission / reception unit 103 (203), the transmission path interface 106, and the like may be realized by the communication device 1004.
  • the transmission / reception unit 103 (203) may be physically or logically separated from the transmission unit 103a (203a) and the reception unit 103b (203b).
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an external input.
  • the output device 1006 is an output device that performs output to the outside (for example, a display, a speaker, an LED (Light Emitting Diode) lamp, and the like). Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • the devices such as the processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using a different bus for each device.
  • the base station 10 and the user terminal 20 include hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured to include hardware, and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • RS Reference Signal
  • a component carrier may be called a cell, a frequency carrier, a carrier frequency, or the like.
  • a radio frame may be configured by one or more periods (frames) in the time domain.
  • the one or more respective periods (frames) forming the radio frame may be referred to as a subframe.
  • a subframe may be configured by one or more slots in the time domain.
  • the subframe may be of a fixed length of time (eg, 1 ms) that does not depend on numerology.
  • the new melology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
  • Numerology includes, for example, subcarrier interval (SCS: SubCarrier @ Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission @ Time @ Interval), number of symbols per TTI, radio frame configuration, transmission and reception.
  • SCS SubCarrier @ Spacing
  • TTI Transmission @ Time @ Interval
  • TTI Transmission @ Time @ Interval
  • radio frame configuration transmission and reception.
  • At least one of a specific filtering process performed by the transceiver in the frequency domain and a specific windowing process performed by the transceiver in the time domain may be indicated.
  • the slot may be configured by one or a plurality of symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain. Further, the slot may be a time unit based on numerology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the slot may include a plurality of mini slots.
  • Each minislot may be constituted by one or more symbols in the time domain.
  • the mini-slot may be called a sub-slot.
  • a minislot may be made up of a smaller number of symbols than slots.
  • a PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (PUSCH) mapping type A.
  • a PDSCH (or PUSCH) transmitted using a minislot may be referred to as a PDSCH (PUSCH) mapping type B.
  • Radio frames, subframes, slots, minislots, and symbols all represent time units when transmitting signals.
  • the radio frame, the subframe, the slot, the minislot, and the symbol may have different names corresponding to each. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be interchanged with each other.
  • one subframe may be called a transmission time interval (TTI: Transmission @ Time @ Interval)
  • TTI Transmission @ Time @ Interval
  • TTI Transmission Time interval
  • a plurality of consecutive subframes may be called a TTI
  • one slot or one minislot is called a TTI.
  • You may. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1 to 13 symbols), or a period longer than 1 ms. It may be.
  • the unit representing the TTI may be called a slot, a minislot, or the like instead of a subframe.
  • the TTI refers to, for example, a minimum time unit of scheduling in wireless communication.
  • the base station performs scheduling for allocating radio resources (frequency bandwidth, transmission power, and the like that can be used in each user terminal) to each user terminal in TTI units.
  • radio resources frequency bandwidth, transmission power, and the like that can be used in each user terminal
  • the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, a time section (for example, the number of symbols) in which a transport block, a code block, a codeword, and the like are actually mapped may be shorter than the TTI.
  • one slot or one minislot is called a TTI
  • one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (mini-slot number) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE@Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, and the like.
  • a TTI shorter than the normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
  • a long TTI (for example, a normal TTI, a subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (for example, a shortened TTI, etc.) may be replaced with a TTI shorter than the long TTI and 1 ms.
  • the TTI having the above-described TTI length may be replaced with the TTI.
  • a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers (subcarriers) in the frequency domain.
  • the number of subcarriers included in the RB may be the same irrespective of the numerology, and may be, for example, 12.
  • the number of subcarriers included in the RB may be determined based on numerology.
  • the RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI.
  • One TTI, one subframe, and the like may each be configured by one or a plurality of resource blocks.
  • one or more RBs include a physical resource block (PRB: Physical @ RB), a subcarrier group (SCG: Sub-Carrier @ Group), a resource element group (REG: Resource @ Element @ Group), a PRB pair, an RB pair, and the like. May be called.
  • PRB Physical @ RB
  • SCG Sub-Carrier @ Group
  • REG Resource @ Element @ Group
  • PRB pair an RB pair, and the like. May be called.
  • a resource block may be composed of one or more resource elements (RE: Resource @ Element).
  • RE Resource @ Element
  • one RE may be a radio resource area of one subcarrier and one symbol.
  • a bandwidth part (which may be referred to as a partial bandwidth or the like) may also represent a subset of consecutive common RBs (common @ resource @ blocks) for a certain numerology in a certain carrier. Good.
  • the common RB may be specified by an index of the RB based on the common reference point of the carrier.
  • a PRB may be defined by a BWP and numbered within the BWP.
  • $ BWP may include a BWP for UL (UL @ BWP) and a BWP for DL (DL @ BWP).
  • BWP for a UE, one or more BWPs may be configured in one carrier.
  • At least one of the configured BWPs may be active, and the UE does not have to assume to transmit and receive a given signal / channel outside the active BWP.
  • “cell”, “carrier”, and the like in the present disclosure may be replaced with “BWP”.
  • the structures of the above-described radio frame, subframe, slot, minislot, symbol, and the like are merely examples.
  • the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, included in an RB The configuration of the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP: Cyclic @ Prefix) length, and the like can be variously changed.
  • the information, parameters, and the like described in the present disclosure may be expressed using an absolute value, may be expressed using a relative value from a predetermined value, or may be expressed using another corresponding information. May be represented.
  • a radio resource may be indicated by a predetermined index.
  • Names used for parameters and the like in the present disclosure are not limited in any respect. Further, the formulas and the like using these parameters may be different from those explicitly disclosed in the present disclosure.
  • the various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.) and information elements can be identified by any suitable name, so the various names assigned to these various channels and information elements Is not a limiting name in any way.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that can be referred to throughout the above description are not limited to voltages, currents, electromagnetic waves, magnetic or magnetic particles, optical or photons, or any of these. May be represented by a combination of
  • information, signals, and the like can be output from the upper layer to at least one of the lower layer and the lower layer to the upper layer.
  • Information, signals, etc. may be input / output via a plurality of network nodes.
  • Information and signals input and output may be stored in a specific place (for example, a memory) or may be managed using a management table. Information and signals that are input and output can be overwritten, updated, or added. The output information, signal, and the like may be deleted. The input information, signal, and the like may be transmitted to another device.
  • Notification of information is not limited to the aspect / embodiment described in the present disclosure, and may be performed using another method.
  • the information is notified by physical layer signaling (for example, downlink control information (DCI: Downlink Control Information), uplink control information (UCI: Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, It may be implemented by broadcast information (master information block (MIB: Master Information Block), system information block (SIB: System Information Block), etc.), MAC (Medium Access Control) signaling), other signals, or a combination thereof.
  • DCI Downlink Control Information
  • UCI Uplink Control Information
  • RRC Radio Resource Control
  • MIB Master Information Block
  • SIB System Information Block
  • MAC Medium Access Control
  • the physical layer signaling may be called L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like.
  • the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
  • the MAC signaling may be notified using, for example, a MAC control element (MAC @ CE (Control @ Element)).
  • the notification of the predetermined information is not limited to an explicit notification, and is implicit (for example, by not performing the notification of the predetermined information or by another information). May be performed).
  • the determination may be made by a value represented by 1 bit (0 or 1), or may be made by a boolean value represented by true or false. , May be performed by comparing numerical values (for example, comparison with a predetermined value).
  • software, instructions, information, and the like may be transmitted and received via a transmission medium.
  • a transmission medium For example, if the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), the website, When transmitted from a server or other remote source, at least one of these wired and / or wireless technologies is included within the definition of a transmission medium.
  • system and “network” as used in this disclosure may be used interchangeably.
  • precoding In the present disclosure, “precoding”, “precoder”, “weight (precoding weight)”, “quasi-co-location (QCL)”, “TCI state (Transmission Configuration Indication state)”, “spatial relation” (Spatial relation), “spatial domain filter”, “transmission power”, “phase rotation”, “antenna port”, “antenna port group”, “layer”, “number of layers”, “ Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, “antenna”, “antenna element”, “panel” are interchangeable Can be used for
  • base station (BS: Base @ Station)”, “wireless base station”, “fixed station (fixed @ station)”, “NodeB”, “eNodeB (eNB)”, “gNodeB (gNB)”, “gNodeB (gNB)” "Access point (access @ point)”, “transmission point (TP: Transmission @ Point)”, “reception point (RP: Reception @ Point)”, “transmission / reception point (TRP: Transmission / Reception @ Point)”, “panel”, “cell” , “Sector”, “cell group”, “carrier”, “component carrier” and the like may be used interchangeably.
  • a base station may also be referred to as a macro cell, a small cell, a femto cell, a pico cell, or the like.
  • a base station can accommodate one or more (eg, three) cells. If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH: Communication services can also be provided by Remote Radio Head)).
  • a base station subsystem eg, a small indoor base station (RRH: Communication services can also be provided by Remote Radio Head).
  • RRH small indoor base station
  • the term “cell” or “sector” refers to part or all of the coverage area of at least one of a base station and a base station subsystem that provides communication services in this coverage.
  • MS mobile station
  • UE user equipment
  • terminal terminal
  • a mobile station is a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal. , Handset, user agent, mobile client, client or some other suitable terminology.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like.
  • at least one of the base station and the mobile station may be a device mounted on the mobile unit, the mobile unit itself, or the like.
  • the moving object may be a vehicle (for example, a car, an airplane, or the like), may be an unmanned moving object (for example, a drone, an autonomous vehicle), or may be a robot (maned or unmanned). ).
  • at least one of the base station and the mobile station includes a device that does not necessarily move during a communication operation.
  • at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be replaced with a user terminal.
  • communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (for example, may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
  • D2D Device-to-Device
  • V2X Vehicle-to-Everything
  • Each aspect / embodiment of the present disclosure may be applied to the configuration.
  • the configuration may be such that the user terminal 20 has the function of the base station 10 described above.
  • words such as “up” and “down” may be read as words corresponding to communication between terminals (for example, “side”).
  • an uplink channel, a downlink channel, and the like may be replaced with a side channel.
  • a user terminal in the present disclosure may be replaced by a base station.
  • a configuration in which the base station 10 has the function of the user terminal 20 described above may be adopted.
  • the operation performed by the base station may be performed by an upper node (upper node) in some cases.
  • various operations performed for communication with a terminal include a base station, one or more network nodes other than the base station (eg, Obviously, it can be performed by MME (Mobility Management Entity), S-GW (Serving-Gateway) or the like, but not limited thereto, or a combination thereof.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • Each aspect / embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching with execution.
  • the processing procedures, sequences, flowcharts, and the like of each aspect / embodiment described in the present disclosure may be interchanged in order as long as there is no inconsistency.
  • elements of various steps are presented in an exemplary order, and are not limited to the specific order presented.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution
  • LTE-B Long Term Evolution-Beyond
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication
  • system 5G (5th generation mobile communication system)
  • FRA Fluture Radio Access
  • New-RAT Radio Access Technology
  • NR New Radio
  • NX New radio access
  • FX Fluture generation radio access
  • GSM Registered trademark
  • CDMA2000 Code Division Multiple Access
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi (registered trademark)
  • IEEE 802.16 WiMAX (registered trademark)
  • UWB Ultra-WideBand
  • Bluetooth registered trademark
  • a system using other appropriate wireless communication methods and a next-generation system extended based on these methods.
  • a plurality of systems may be combined (for example, a combination of LTE or LTE-A and 5G) and applied.
  • any reference to elements using designations such as "first,” “second,” etc., as used in this disclosure, does not generally limit the quantity or order of those elements. These designations may be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not mean that only two elements can be employed or that the first element must precede the second element in any way.
  • determining means judging, calculating, computing, processing, deriving, investigating, searching (upping, searching, inquiry) ( For example, a search in a table, database, or another data structure), ascertaining, etc., may be regarded as "deciding".
  • determining includes receiving (eg, receiving information), transmitting (eg, transmitting information), input (input), output (output), and access ( accessing) (e.g., accessing data in a memory) or the like.
  • judgment (decision) is regarded as “judgment (decision)” of resolving, selecting, selecting, establishing, comparing, etc. Is also good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of any operation.
  • “judgment (decision)” may be read as “assuming”, “expecting”, “considering”, or the like.
  • the “maximum transmission power” described in the present disclosure may mean the maximum value of the transmission power, may mean the nominal maximum transmission power (the nominal UE maximum transmit power), or may refer to the rated maximum transmission power (the rated UE maximum transmit power).
  • connection refers to any direct or indirect connection or coupling between two or more elements. And may include the presence of one or more intermediate elements between two elements “connected” or “coupled” to each other.
  • the coupling or connection between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”.
  • the radio frequency domain, microwave It can be considered to be “connected” or “coupled” to each other using electromagnetic energy having a wavelength in the region, light (both visible and invisible) regions, and the like.
  • the term “A and B are different” may mean that “A and B are different from each other”.
  • the term may mean that “A and B are different from C”.
  • Terms such as “separate”, “coupled” and the like may be interpreted similarly to "different”.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un mode de réalisation de l'invention concerne un équipement utilisateur comprenant : une unité de transmission pour transmettre un canal partagé de liaison montante ; et une unité de commande pour transmettre des accusés de réception de requête automatique de répétition hybride (HARQ-ACK) sur le canal partagé de liaison montante d'après le nombre de HARQ-ACK devant être transmis en réponse à des données de liaison descendante. D'après le mode de réalisation de la présente invention, il est possible de commander correctement la transmission de signaux de confirmation de livraison sur le canal partagé de liaison montante.
PCT/JP2018/030669 2018-08-20 2018-08-20 Équipement utilisateur, et procédé de communication radio WO2020039482A1 (fr)

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CN115699812A (zh) * 2020-03-27 2023-02-03 株式会社Ntt都科摩 终端、无线通信方法以及基站
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