WO2019225655A1 - Terminal utilisateur - Google Patents

Terminal utilisateur Download PDF

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Publication number
WO2019225655A1
WO2019225655A1 PCT/JP2019/020297 JP2019020297W WO2019225655A1 WO 2019225655 A1 WO2019225655 A1 WO 2019225655A1 JP 2019020297 W JP2019020297 W JP 2019020297W WO 2019225655 A1 WO2019225655 A1 WO 2019225655A1
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WIPO (PCT)
Prior art keywords
user terminal
unit
signal
transmission
coding rate
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PCT/JP2019/020297
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English (en)
Japanese (ja)
Inventor
翔平 吉岡
祐輝 松村
一樹 武田
聡 永田
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
Publication of WO2019225655A1 publication Critical patent/WO2019225655A1/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present disclosure relates to a user terminal in a next generation mobile communication system.
  • LTE Long Term Evolution
  • Non-patent Document 1 LTE Advanced, LTE Rel. 10, 11, 12, 13
  • LTE Rel. 8, 9 LTE Advanced, LTE Rel. 10, 11, 12, 13
  • LTE successor systems for example, FRA (Future Radio Access), 5G (5th generation mobile communication system), 5G + (plus), NR (New Radio), NX (New radio access), FX (Future generation radio access), LTE Also referred to as Rel.
  • the user terminal In the existing LTE system (for example, 3GPP Rel. 8-14), the user terminal (UE: User Equipment) is based on downlink control information (DCI: Downlink Control Information, also called DL assignment) from the radio base station. Then, reception of a physical downlink shared channel (for example, PDSCH: Physical Downlink Shared Channel) is controlled. Further, the user terminal controls transmission of a physical uplink shared channel (for example, PUSCH: Physical Uplink Shared Channel) based on DCI (also referred to as UL grant or the like).
  • DCI Downlink Control Information
  • PUSCH Physical Uplink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • UL-SCH Uplink Shared Channel
  • a user terminal can perform PUSCH scheduling according to a DCI based on the value of a predetermined field (eg, modulation and coding scheme (MCS) field) in downlink control information (DCI). It has been considered to determine at least one of the modulation order and the coding rate.
  • MCS modulation and coding scheme
  • the present disclosure has been made in view of the above points, and provides a user terminal capable of appropriately transmitting a physical uplink shared channel (for example, PUSCH) without a corresponding transport channel (for example, UL-SCH).
  • PUSCH physical uplink shared channel
  • UL-SCH transport channel
  • a user terminal includes a receiving unit that receives downlink control information including a first field indicating a physical uplink shared channel without a corresponding transport channel, and a first unit in the downlink control information
  • a control unit that determines a coding rate of the physical uplink shared channel to a specific coding rate when the two fields indicate a specific index value.
  • a physical uplink shared channel for example, PUSCH
  • a corresponding transport channel for example, UL-SCH
  • FIG. 1 is a diagram illustrating an example of the MCS table.
  • FIG. 2 is a diagram illustrating an example of the MCS table.
  • FIG. 3 is a diagram illustrating an example of the MCS table.
  • FIG. 4 is a diagram illustrating an example of determining the coding rate of PUSCH without UL-SCH according to the first aspect.
  • FIG. 5 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment.
  • FIG. 6 is a diagram illustrating an example of the overall configuration of a radio base station according to an embodiment.
  • FIG. 7 is a diagram illustrating an example of a functional configuration of a radio base station according to an embodiment.
  • FIG. 8 is a diagram illustrating an example of the overall configuration of a user terminal according to an embodiment.
  • FIG. 9 is a diagram illustrating an example of a functional configuration of a user terminal according to an embodiment.
  • FIG. 10 is a diagram illustrating an example of a hardware configuration of a radio base
  • a predetermined field for example, modulation and coding scheme (MCS) field included in downlink control information (DCI: Downlink Control Information) (UL grant, for example, DCI format 0_0, 0_-1).
  • DCI Downlink Control Information
  • UL grant for example, DCI format 0_0, 0_-1).
  • PUSCH Physical Uplink Shared Channel
  • the user terminal (UE: User Equipment) indicates the MCS field in the DCI using a table (MCS table) that associates an MCS index, a modulation order, and a TBS index. It has been studied to determine the modulation order / coding rate corresponding to the MCS index for PUSCH.
  • MCS table MCS table
  • each modulation order is a value corresponding to each modulation method.
  • the modulation orders of QPSK (Quadrature Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation), 64QAM, and 256QAM are 2, 4, 6, and 8, respectively.
  • FIG. 1-3 is a diagram illustrating an example of the MCS table. Note that the values of the MCS table shown in FIG. 1-3 are merely examples, and are not limited thereto. Further, some items (for example, spectral efficiency) associated with the MCS index (I MCS ) may be omitted, or other items may be added.
  • I MCS spectral efficiency
  • the user terminal may determine which MCS table to use to determine the PUSCH modulation order / coding rate using at least one of the following conditions (1) and (2): (1) Whether transform precoding is enabled (either DFT spread OFDM (DFT-s-OFDM) waveform or OFDM waveform is applied) Or) (2) Whether information indicating the MCS table (MCS table information) used by the user terminal indicates a specific modulation scheme (for example, 256QAM), (3) Which RNTI (Radio Network Temporary Identifier) is used to scramble the CRC (rCR to be CRC scrambled) DCI.
  • MCS table information for example, 256QAM
  • RNTI Radio Network Temporary Identifier
  • the user terminal may be scrambled with DCI (eg, DCI format 0_0 or 0_1) with a specific RNTI (eg, C-RNTI, TC-RNTI, CS-RNTI), and transform precoding is disabled ( disable) and the MCS table information does not indicate 256QAM, the modulation order / coding rate corresponding to the MCS index (I MCS ) in the DCI is determined using the table shown in FIG. Also good.
  • DCI eg, DCI format 0_0 or 0_1
  • a specific RNTI eg, C-RNTI, TC-RNTI, CS-RNTI
  • transform precoding is disabled ( disable) and the MCS table information does not indicate 256QAM
  • the modulation order / coding rate corresponding to the MCS index (I MCS ) in the DCI is determined using the table shown in FIG. Also good.
  • the user terminal uses the table shown in FIG. 2 to correspond to the MCS index (I MCS ) in the DCI.
  • the modulation order / coding rate may be determined.
  • the user terminal when transform precoding is enabled and the MCS table information does not indicate 256QAM, the user terminal supports the MCS index (I MCS ) in the DCI using the table shown in FIG.
  • the modulation order / coding rate to be used may be determined.
  • the modulation order q corresponding to a specific MCS index (for example, 0, 1) is 1 (BPSK). May be.
  • the modulation order q may be 2 (QPSK).
  • the user terminal uses the table shown in FIG. 2 to correspond to the MCS index (I MCS ) in the DCI.
  • the modulation order / coding rate may be determined.
  • the conditions for using the table shown in FIG. 1-3 are not limited to the above conditions.
  • NR supports CSI reporting in which a user terminal measures a result of measurement based on a channel state measurement reference signal as channel state information (CSI) and feeds it back to a radio base station at a predetermined timing.
  • CSI channel state information
  • the reference signal for measuring the channel state is also called, for example, CSI-RS (Channel State Information-Reference Signal), but is not limited thereto.
  • the CSI may include at least one of CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), and RI (Rank Indicator).
  • the CSI may include at least one of the first CSI (CSI part 1) and the second CSI (CSI part 2).
  • CSI reports include periodic CSI reports (P-CSI reports), semi-persistent (Semi-Persistent) resources using CSI reports (SP-CSI reports), non-persistent Periodic CSI reporting (A-CSI reporting) is supported.
  • the UE When performing A-CSI reporting, the UE transmits A-CSI in response to a CSI trigger (CSI request) from the radio base station. For example, the UE performs A-CSI reporting after a predetermined timing (for example, 4 subframes) after receiving the CSI trigger.
  • CSI trigger for example, 4 subframes
  • the A-CSI trigger is included in downlink control information (DCI) transmitted using a downlink control channel (PDCCH: Physical Downlink Control Channel).
  • DCI downlink control information
  • PDCCH Physical Downlink Control Channel
  • the 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 CSI using the PUSCH specified by the UL grant including the A-CSI trigger.
  • the PUSCH is also referred to as PUSCH without UL-SCH (PUSCH without UL-SCH) or the like when there is no corresponding transport channel (also referred to as UL-SCH: Uplink Shared Channel, uplink data, uplink user data, etc.).
  • Whether or not the PUSCH is without UL-SCH may be indicated by a predetermined field (for example, UL-SCH identifier (UL-SCH indicator) field) in the UL grant.
  • UL-SCH identifier field is 1 bit, and may indicate whether the PUSCH without UL-SCH or the PUSCH with UL-SCH.
  • PUSCH without UL-SCH is used for transmission of uplink control information (for example, A-CSI), and data (for example, uplink user data and upper layer control information of UL-SCH) is transmitted on PUSCH with UL-SCH.
  • uplink control information for example, A-CSI
  • data for example, uplink user data and upper layer control information of UL-SCH
  • the content of transmitted data is different from at least one).
  • the user terminal determines the modulation order / coding rate of PUSCH without UL-SCH under the same conditions as PUSCH with UL-SCH, transmission of PUSCH without UL-SCH is appropriately controlled. There is a fear that it cannot be done.
  • the UL-SCH identifier field in the UL grant indicates that the PUSCH has no UL-SCH, it corresponds to the MCS index in the UL grant using the MCS table illustrated in FIGS.
  • the modulation order / coding rate is determined, there is a possibility that PUSCH without the UL-SCH cannot be transmitted appropriately.
  • the present inventors have studied a method of determining the modulation order / coding rate suitable for PUSCH without UL-SCH and have arrived at the present invention. Specifically, the inventors have identified specific MCS indexes (eg, 29-31 in FIG. 1, 28-31 in FIG. 2, 28-31 in FIG. Focusing on the fact that the coding rate corresponding to 28-31) is not defined, the idea was to use the specific MCS index to determine the modulation order / coding rate of PUSCH without UL-SCH.
  • specific MCS indexes eg, 29-31 in FIG. 1, 28-31 in FIG. 2, 28-31 in FIG. Focusing on the fact that the coding rate corresponding to 28-31) is not defined, the idea was to use the specific MCS index to determine the modulation order / coding rate of PUSCH without UL-SCH.
  • the user terminal has a DCI (downlink) including a UL-SCH identifier field (first field) indicating that it is a PUSCH without a UL-SCH (a physical uplink shared channel without a corresponding transport channel). Control information).
  • DCI downlink
  • first field a UL-SCH identifier field indicating that it is a PUSCH without a UL-SCH (a physical uplink shared channel without a corresponding transport channel). Control information).
  • the user terminal When the MCS field (second field) in the DCI indicates a specific index value (for example, 28-31 in FIGS. 2 and 3, or 29-31 in FIG. 1), the user terminal The coding rate is determined to be a specific coding rate.
  • the specific coding rate may be at least one of the following: A value predetermined in the specification corresponding to the specific index value, A value set by higher layer signaling corresponding to the specific index value, A value determined based on the value of one or more fields in the DCI; A value determined based on resources allocated to the PUSCH.
  • FIG. 4 is a diagram illustrating an example of determining the coding rate of PUSCH without UL-SCH according to the first aspect. Note that the determination shown in FIG. 4 may be applied when the UL-SCH identifier field in the DCI indicates a PUSCH without UL-SCH, or is related to the value of the UL-SCH identifier field. It may be applied without.
  • step S101 of FIG. 4 the user terminal determines that the MCS field in DCI (for example, DCI format 0_0 or 0_1) has a specific index value (MCS index, MCS index value, MCS field value, simply “value”, “index”). Or the like).
  • the specific index value may be, for example, any of 28 to 31 or any of 29 to 31.
  • the DCI is CRC scrambled with a specific RNTI (eg, C-RNTI, TC-RNTI, CS-RNTI), transform precoding is invalidated, and the MCS table information does not indicate 256QAM.
  • a specific RNTI eg, C-RNTI, TC-RNTI, CS-RNTI
  • transform precoding is invalidated
  • the MCS table information does not indicate 256QAM.
  • the specific index may be 29 to 31.
  • the table shown in FIG. 2 is used, so the specific index may be 28-31.
  • the table shown in FIG. 3 is used, so the specific index may be 28-31.
  • the user terminal uses the table shown in FIG. 2, and therefore the specific index is 28 to 31. Also good.
  • step S102 the user terminal sets the coding rate of PUSCH scheduled by the DCI to a specific coding rate (value, predetermined). May also be determined).
  • the specific coding rate may be a value determined in advance by specifications.
  • a table that defines coding rates corresponding to MCS index values 28 to 31 (or 29 to 31) may be defined.
  • the user terminal may determine the coding rate corresponding to the MCS field value in DCI in the table as the specific coding rate.
  • the specific coding rate may be a value set by higher layer signaling.
  • the user terminal may receive information (coding rate information) indicating coding rates respectively corresponding to the MCS index values 28 to 31 (or 29 to 31) by higher layer signaling.
  • the user terminal may determine a coding rate corresponding to the MCS field value in DCI indicated by the coding rate information as the specific coding rate.
  • the specific coding rate may be a value determined based on the values of one or more fields in DCI.
  • the particular coding rate may be determined based on at least one of the following field values in the DCI: A field indicating time domain resources allocated to the PUSCH; A field indicating a frequency region resource allocated to PUSCH, A field indicating the HARQ process number, A field indicating a carrier (cell, component carrier) to which a PUSCH is allocated; A field indicating a bandwidth part (BWP) to which the PUSCH is allocated; A field indicating whether or not frequency hopping is applied, A field indicating UL or SUL (Supplementary uplink).
  • the specific coding rate may be determined based on resources allocated to the PUSCH.
  • the resources include time domain resources (eg, symbols), frequency domain resources (eg, one or more resource blocks, resource block groups, etc.), code domain resources (eg, orthogonal spreading codes), spatial domain resources (eg, beam). ).
  • step S102 in FIG. 4 the user terminal determines the PUSCH modulation order to the modulation order corresponding to the specific index value indicated by the MCS field in the DCI in the MCS table (eg, FIGS. 1 to 3). May be. Or a user terminal may determine the said modulation order to a specific modulation order similarly to a code rate.
  • step S103 The user terminal may determine the PUSCH coding rate to the coding rate associated with the index value of the MCS field in DCI in the MCS table (for example, see FIGS. 1 to 3).
  • the user terminal may determine the PUSCH modulation order to the modulation order corresponding to the index value indicated by the MCS field in the DCI in the MCS table (eg, FIGS. 1 to 3).
  • the user terminal when the user terminal receives DCI including a UL-SCH identifier field indicating that the PUSCH has no UL-SCH, whether or not the MCS field in the DCI indicates a specific index value.
  • the MCS field in the DCI indicates a specific index value.
  • any of 28 to 31 (or 29 to 31) may be designated as the MCS index of PUSCH without UL-SCH, or any of 0 to 27 (or 0 to 28) may be designated. May be.
  • the above determination (for example, step S101 in FIG. 4) may be omitted.
  • any one of 28 to 31 (or 29 to 31) is designated as the MCS index of the PUSCH without UL-SCH, and the user terminal sets the coding rate of the PUSCH to a specific coding rate. You may decide.
  • the use of PUSCH without UL-SCH described in the first aspect is not limited to A-CSI reporting.
  • the use of PUSCH without UL-SCH may be used for transmission of uplink control information (UCI) including at least one of HARQ-ACK, CSI, and scheduling request.
  • UCI uplink control information
  • the content described in the first aspect may be applied not only to PUSCH without UL-SCH but also to PUSCH with UL-SCH.
  • wireless communication system (Wireless communication system)
  • communication is performed using at least one of the wireless communication methods described in the above embodiments or a combination thereof.
  • FIG. 5 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment.
  • carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a system bandwidth (for example, 20 MHz) of the LTE system as one unit 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), 5G. (5th generation mobile communication system), NR (New Radio), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., or a system that realizes these.
  • the radio communication system 1 includes a radio base station 11 that forms a macro cell C1 having a relatively wide coverage, and a radio base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. It is equipped with. Moreover, the user terminal 20 is arrange
  • the user terminal 20 can be connected to both the radio base station 11 and the radio base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 at the same time using CA or DC. Moreover, the user terminal 20 may apply CA or DC using a plurality of cells (CC) (for example, 5 or less CCs, 6 or more CCs).
  • CC cells
  • Communication between the user terminal 20 and the radio 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, etc.
  • the same carrier may be used.
  • the configuration of the frequency band used by each radio base station is not limited to this.
  • the user terminal 20 can perform communication using time division duplex (TDD) and / or frequency division duplex (FDD) in each cell.
  • TDD time division duplex
  • FDD frequency division duplex
  • a single neurology may be applied, or a plurality of different neurology 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, specific filtering process performed by the transceiver in the frequency domain, specific windowing process performed by the transceiver in the time domain, and the like.
  • the subcarrier intervals of the constituting OFDM symbols are different and / or when the number of OFDM symbols is different, it may be referred to as having different neumerities.
  • the wireless base station 11 and the wireless base station 12 are connected by wire (for example, optical fiber compliant with CPRI (Common Public Radio Interface), X2 interface, etc.) or wirelessly. May be.
  • the radio base station 11 and each radio base station 12 are connected to the higher station apparatus 30 and connected to the core network 40 via the higher station apparatus 30.
  • the upper station device 30 includes, for example, an access gateway device, 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 radio base station 12 may be connected to the higher station apparatus 30 via the radio base station 11.
  • the radio base station 11 is a radio base station having a 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 radio base station 12 is a radio base station having local coverage, and includes 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), and transmission / reception. It may be called a point.
  • the radio base stations 11 and 12 are not distinguished, they are collectively referred to as a radio base station 10.
  • Each user terminal 20 is a terminal that supports various communication schemes such as LTE and LTE-A, and may include not only a mobile communication terminal (mobile station) but also a fixed communication terminal (fixed station).
  • orthogonal frequency division multiple access (OFDMA) is applied to the downlink, and single carrier-frequency division multiple access (SC-FDMA) is used for the uplink.
  • SC-FDMA single carrier-frequency division multiple access
  • Frequency Division Multiple Access and / or OFDMA is applied.
  • OFDMA is a multi-carrier transmission scheme that performs communication by dividing a frequency band into a plurality of narrow frequency bands (subcarriers) and mapping data to each subcarrier.
  • SC-FDMA is a single carrier transmission in which the system bandwidth is divided into bands each composed of one or continuous resource blocks for each terminal, and a plurality of terminals use different bands to reduce interference between 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 physical downlink shared channel (PDSCH) shared by each user terminal 20 a physical broadcast channel (PBCH), a downlink L1 / L2 control channel Etc. are used.
  • PBCH physical broadcast channel
  • SIB System Information Block
  • MIB Master Information Block
  • Downlink L1 / L2 control channels are physical downlink control channels (PDCCH (Physical Downlink Control Channel) and / or EPDCCH (Enhanced Physical Downlink Control Channel)), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel). ).
  • Downlink control information (DCI: Downlink Control Information) including PDSCH and / or PUSCH scheduling information is transmitted by the PDCCH.
  • scheduling information may be notified by DCI.
  • DCI for scheduling DL data reception may be referred to as DL assignment
  • DCI for scheduling UL data transmission may be referred to as UL grant.
  • the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
  • the PHICH transmits HARQ (Hybrid Automatic Repeat reQuest) delivery confirmation information (for example, retransmission control information, HARQ-ACK, ACK / NACK, etc.) to the PUSCH.
  • HARQ Hybrid Automatic Repeat reQuest
  • EPDCCH is frequency-division multiplexed with PDSCH (downlink shared data channel), and is used for transmission of DCI and the like in the same manner as PDCCH.
  • a physical uplink shared channel shared by each user terminal 20
  • a physical uplink control channel PUCCH
  • PRACH Physical Random Access Channel
  • User data, higher layer control information, etc. are transmitted by PUSCH.
  • downlink radio link quality information CQI: Channel Quality Indicator
  • delivery confirmation information SR
  • scheduling request etc.
  • a random access preamble for establishing connection with the cell is transmitted by the PRACH.
  • a cell-specific reference signal CRS
  • CSI-RS channel state information reference signal
  • DMRS demodulation reference signal
  • PRS Positioning Reference Signal
  • a measurement reference signal SRS: Sounding Reference Signal
  • a demodulation reference signal DMRS
  • the DMRS may be referred to as a user terminal specific reference signal (UE-specific Reference Signal). Further, the transmitted reference signal is not limited to these.
  • FIG. 6 is a diagram illustrating an example of the overall configuration of a radio base station according to an embodiment.
  • the radio base station 10 includes a plurality of transmission / reception antennas 101, an amplifier unit 102, a transmission / reception unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106.
  • the transmission / reception antenna 101, the amplifier unit 102, and the transmission / reception unit 103 may each be configured to include one or more.
  • User data transmitted from the radio base station 10 to the user terminal 20 via the downlink is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access
  • Retransmission control for example, HARQ transmission processing
  • scheduling transmission format selection, channel coding, Inverse Fast Fourier Transform (IFFT) processing, precoding processing, and other transmission processing
  • IFFT Inverse Fast Fourier Transform
  • precoding processing precoding processing, and other transmission processing
  • the downlink control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and is transferred to the transmission / reception unit 103.
  • the transmission / reception unit 103 converts the baseband signal output by precoding for each antenna from the baseband signal processing unit 104 to a radio frequency band and transmits the converted signal.
  • the radio frequency signal frequency-converted by the transmission / reception unit 103 is amplified by the amplifier unit 102 and transmitted from the transmission / reception 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.
  • the transmission / reception part 103 may be comprised as an integral transmission / reception part, and may be comprised from a transmission part and a receiving part.
  • the radio frequency signal received by the transmission / reception antenna 101 is amplified by the amplifier unit 102.
  • the transmission / reception unit 103 receives the uplink signal amplified by the amplifier unit 102.
  • the transmission / reception unit 103 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 104.
  • the baseband signal processing unit 104 performs fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT: Inverse Discrete Fourier Transform) processing, and error correction on user data included in the input upstream signal.
  • FFT fast Fourier transform
  • IDFT inverse discrete Fourier transform
  • Decoding, MAC retransmission control reception processing, RLC layer and PDCP layer reception processing are performed and transferred to the upper station apparatus 30 via the transmission path interface 106.
  • the call processor 105 performs communication channel call processing (setting, release, etc.), status management of the radio base station 10, radio resource management, and the like.
  • the transmission path interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface.
  • the transmission path interface 106 transmits / receives signals (backhaul signaling) to / from other radio base stations 10 via an interface between base stations (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), X2 interface). May be.
  • CPRI Common Public Radio Interface
  • X2 interface May be.
  • the transmission / reception unit 103 transmits a downlink (DL) signal to the user terminal 20 (for example, at least one of a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH) (DCI), and a DL reference signal).
  • a downlink (DL) signal for example, at least one of a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH) (DCI), and a DL reference signal.
  • a downlink (DL) signal for example, at least one of a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH) (DCI), and a DL reference signal.
  • a uplink (UL) signal including at least one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUSCH), and a UL reference signal
  • FIG. 7 is a diagram illustrating an example of a functional configuration of a radio base station according to an embodiment.
  • the functional block of the characteristic part in this Embodiment is mainly shown, and it may be assumed that the radio base station 10 also has another functional block required for radio
  • 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. These configurations may be included in the radio base station 10, and a part or all of the configurations may not be included in the baseband signal processing unit 104.
  • the control unit (scheduler) 301 controls the entire radio base station 10.
  • the control unit 301 can be configured by 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 allocation in the mapping unit 303, and the like.
  • the control unit 301 also controls signal reception processing in the reception signal processing unit 304, signal measurement in the measurement unit 305, and the like.
  • the control unit 301 schedules system information, downlink data signals (for example, signals transmitted by PDSCH), downlink control signals (for example, signals transmitted by PDCCH and / or EPDCCH, delivery confirmation information, etc.) (for example, resource Control). In addition, the control unit 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 necessary for the uplink data signal.
  • downlink data signals for example, signals transmitted by PDSCH
  • downlink control signals for example, signals transmitted by PDCCH and / or EPDCCH, delivery confirmation information, etc.
  • resource Control for example, resource Control
  • the control unit 301 controls scheduling such as a synchronization signal (for example, PSS / SSS) and a downlink reference signal (for example, CRS, CSI-RS, DMRS).
  • a synchronization signal for example, PSS / SSS
  • a downlink reference signal for example, CRS, CSI-RS, DMRS
  • the control unit 301 may control at least one of generation and transmission of downlink control information. Specifically, the control unit 301 may control generation and transmission of downlink control information including a first field indicating that the physical uplink shared channel has no corresponding transport channel.
  • control unit 301 may control at least one of the modulation scheme and coding rate of the physical uplink shared channel. Specifically, the control unit 301 may control generation and transmission of downlink control information including an index value indicating at least one of the modulation scheme and coding rate of the physical uplink shared channel.
  • the transmission signal generation unit 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) based on an instruction from the control unit 301, and outputs it to the mapping unit 303.
  • the transmission signal generation unit 302 can be configured by 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, for example, 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.
  • the DL assignment and UL grant are both DCI and follow the DCI format.
  • the downlink data signal is subjected to coding processing, modulation processing, and the like according to a coding rate, a modulation scheme, and the like determined based on channel state information (CSI: Channel State Information) from each user terminal 20.
  • CSI Channel State Information
  • the mapping unit 303 maps the downlink signal generated by the transmission signal generation unit 302 to a predetermined radio resource based on an instruction from the control unit 301, and outputs it to the transmission / reception unit 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, decoding, etc.) 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 by 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 receiving PUCCH including HARQ-ACK, HARQ-ACK is output to control section 301.
  • the reception signal processing unit 304 outputs the reception signal and / or the signal after 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, and the like based on the received signal.
  • the measurement unit 305 includes reception 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)).
  • reception 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)
  • propagation path information for example, CSI
  • the measurement result may be output to the control unit 301.
  • the transmission / reception unit 103 may transmit a downlink shared channel (PDSCH: Physical Downlink Shared Channel) and a demodulation reference signal (DMRS: DeModulation Reference Signal) for the PDSCH.
  • PDSCH Physical Downlink Shared Channel
  • DMRS DeModulation Reference Signal
  • the transmission / reception unit 103 may receive a physical uplink shared channel (PUSCH) and a demodulation reference signal (DMRS: DeModulation Reference Signal) for the PUSCH.
  • PUSCH physical uplink shared channel
  • DMRS DeModulation Reference Signal
  • the transmission / reception unit 103 may receive uplink control information (UCI) that is multiplexed and transmitted by at least one of a plurality of uplink channels (for example, PUCCH and PUCCH, or PUCCH and PUSCH) overlapping in a certain slot.
  • UCI uplink control information
  • the control unit 301 does not have the first symbol of the earliest uplink channel among the plurality of uplink channels before the N 1 + X symbol after the last symbol of any corresponding downlink shared channel (PDSCH), And expecting no earlier than N 2 + Y symbols after the last symbol of any corresponding downlink control channel (PDCCH), where the UCI multiplexes either X or Y or both It may be determined based on the length of.
  • PDSCH downlink shared channel
  • PDCCH downlink control channel
  • FIG. 8 is a diagram illustrating an example of the overall configuration of a user terminal according to an embodiment.
  • the user terminal 20 includes a plurality of transmission / reception antennas 201, an amplifier unit 202, a transmission / reception unit 203, a baseband signal processing unit 204, and an application unit 205.
  • the transmission / reception antenna 201, the amplifier unit 202, and the transmission / reception unit 203 may each be configured to include one or more.
  • the radio frequency signal received by the transmission / reception 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 transmission / reception unit 203 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 204.
  • the transmission / reception unit 203 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.
  • the transmission / reception unit 203 may be configured as an integral 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, retransmission control reception processing, 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, broadcast information of downlink data 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 processing unit 204 performs transmission / reception units for retransmission control (for example, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like. 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 it.
  • the radio frequency signal frequency-converted by the transmission / reception unit 203 is amplified by the amplifier unit 202 and transmitted from the transmission / reception antenna 201.
  • the transmission / reception unit 203 includes a downlink (DL) signal from the radio base station 10 (for example, including at least one of a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH) (DCI), and a DL reference signal). And an uplink (UL) signal (including at least one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUSCH), and a UL reference signal) is transmitted to the radio base station 10.
  • DL downlink
  • PDCH physical downlink control channel
  • UL uplink
  • FIG. 9 is a diagram illustrating an example of a functional configuration of a user terminal according to an embodiment.
  • the functional block of the characteristic part in this Embodiment is mainly shown, and it may be assumed that the user terminal 20 also has another functional block required for radio
  • the baseband signal processing unit 204 included in 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 may be included in the user terminal 20, and some or all of the configurations may 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 by 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 allocation in the mapping unit 403, and the like.
  • the control unit 401 also controls signal reception processing in the reception signal processing unit 404, 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 radio base station 10 from the reception signal processing unit 404.
  • the control unit 401 controls the generation of the uplink control signal and / or the uplink data signal based on the result of determining the necessity of retransmission control for the downlink control signal and / or the downlink data signal.
  • the control unit 401 monitors (blind decoding) a control resource set (internal search space) and detects downlink control information.
  • the downlink control information may include a first field indicating that the physical uplink shared channel has no corresponding transport channel.
  • control unit 401 may determine the coding rate and modulation order of the physical uplink shared channel and control transmission of the physical uplink shared channel. Specifically, when the second field in the downlink control information indicates a specific index value, the control unit 401 may determine the coding rate of the physical uplink shared channel as a specific coding rate. .
  • the specific coding rate may be a value determined in advance corresponding to the specific index value.
  • the specific coding rate may be a value set by higher layer signaling corresponding to the specific index value.
  • the specific coding rate may be determined based on a value of one or more fields in the downlink control information.
  • the specific coding rate may be determined based on resources allocated to the physical uplink shared channel.
  • the control unit 401 When the second field in the downlink control information indicates a value other than the specific index value, the control unit 401 indicates the index field, the modulation order, and the coding rate in the table that the second field indicates.
  • the coding rate of the physical uplink shared channel may be determined as the coding rate associated with the value.
  • control unit 401 may update parameters used for control based on the information.
  • the transmission signal generation unit 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) based on an instruction from the control unit 401 and outputs the uplink signal to the mapping unit 403.
  • the transmission signal generation unit 402 can be configured by 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 delivery confirmation information, channel state information (CSI), and the like based on an instruction from the control unit 401, for example. In addition, the transmission signal generation unit 402 generates an uplink data signal based on an instruction from the control unit 401. For example, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal when the UL grant is included in the downlink control signal notified from the radio base station 10.
  • CSI channel state information
  • the mapping unit 403 maps the uplink signal generated by the transmission signal generation unit 402 to a radio resource based on an instruction from the control unit 401, and outputs the radio signal to the transmission / reception unit 203.
  • the mapping unit 403 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 404 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 203.
  • the received signal is, for example, a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) transmitted from the radio base station 10.
  • the reception signal processing unit 404 can be configured by 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. Further, the reception signal processing unit 404 can constitute 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.
  • the reception signal processing unit 404 outputs the reception signal and / or the signal after reception processing to the measurement unit 405.
  • the measurement unit 405 performs measurement on 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), propagation path information (for example, CSI), and the like.
  • the measurement result may be output to the control unit 401.
  • the transmission / reception unit 203 may multiplex and transmit uplink control information (UCI) on at least one of a plurality of uplink channels (for example, PUCCH and PUCCH, or PUCCH and PUSCH) overlapping in a certain slot.
  • UCI uplink control information
  • the control unit 401 does not have the first symbol of the earliest uplink channel among the plurality of uplink channels before the N 1 + X symbol after the last symbol of any corresponding downlink shared channel (PDSCH), And expecting no earlier than N 2 + Y symbols after the last symbol of any corresponding downlink control channel (PDCCH), where the UCI multiplexes either X or Y or both It may be determined based on the length of.
  • PDSCH downlink shared channel
  • PDCCH downlink control channel
  • each functional block is realized using one device physically or logically coupled, or two or more devices physically or logically separated may be directly or indirectly (for example, (Using wired, wireless, etc.) and may be implemented using these multiple devices.
  • a wireless base station, a user terminal, and the like may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 10 is a diagram illustrating an example of a hardware configuration of a radio base station and a user terminal according to an embodiment.
  • the wireless base station 10 and the user terminal 20 described above 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. Good.
  • the term “apparatus” can be read as a circuit, a device, a unit, or the like.
  • the hardware configurations of the radio base station 10 and the user terminal 20 may be configured to include one or a plurality of each device illustrated in the figure, or may be configured not to include some devices.
  • processor 1001 may be implemented by one or more chips.
  • Each function in the radio base station 10 and the user terminal 20 is calculated by causing the processor 1001 to perform calculations by reading predetermined software (programs) on hardware such as the processor 1001 and the memory 1002, for example, via the communication device 1004. This is realized by controlling communication or controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
  • 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) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.
  • CPU central processing unit
  • the baseband signal processing unit 104 (204) and the call processing unit 105 described above may be realized by the processor 1001.
  • the processor 1001 reads 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
  • the control unit 401 of the user terminal 20 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized similarly for other functional blocks.
  • the memory 1002 is a computer-readable recording medium such as a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically EPROM), a RAM (Random Access Memory), or any other suitable storage medium. It may be configured 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 perform 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)), a digital versatile disk, Blu-ray® disk), removable disk, hard disk drive, smart card, flash memory device (eg, card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium It may be constituted by.
  • the storage 1003 may be referred to as 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 a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be constituted by.
  • 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 described above may be realized by the communication device 1004.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED (Light Emitting Diode) lamp, etc.) that performs output to the outside.
  • 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 radio base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), and the like. It may be configured including hardware, and a part or all of each functional block may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these hardware.
  • DSP digital signal processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meaning.
  • the signal may be a message.
  • the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot, a pilot signal, or the like depending on an applied standard.
  • a component carrier CC: Component Carrier
  • CC Component Carrier
  • the radio frame may be configured by one or a plurality of periods (frames) in the time domain.
  • Each of the one or more periods (frames) constituting the radio frame may be referred to as a subframe.
  • a subframe may be composed of one or more slots in the time domain.
  • the subframe may have a fixed time length (eg, 1 ms) that does not depend on the neurology.
  • 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 the 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 configured with one or more symbols in the time domain.
  • the minislot may also be called a subslot.
  • a mini-slot may be composed of fewer symbols than slots.
  • PDSCH and PUSCH transmitted in units of time larger than the minislot may be referred to as PDSCH / PUSCH mapping type A.
  • the PDSCH and PUSCH transmitted using the minislot may be referred to as PDSCH / PUSCH mapping type B.
  • Radio frame, subframe, slot, minislot, and symbol all represent time units when transmitting signals. Different names may be used for the radio frame, subframe, slot, minislot, and symbol.
  • one subframe may be called a transmission time interval (TTI)
  • TTI transmission time interval
  • a plurality of consecutive subframes may be called a TTI
  • TTI slot or one minislot
  • a unit representing TTI may be called a slot, a minislot, or the like instead of a subframe.
  • TTI means, for example, a minimum time unit for scheduling in wireless communication.
  • a radio base station performs scheduling for assigning radio resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) to each user terminal in units of TTI.
  • the definition of TTI is not limited to this.
  • 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 or link adaptation.
  • a time interval for example, the number of symbols
  • a transport block, a code block, a code word, etc. may be shorter than the TTI.
  • one or more TTIs may be the minimum scheduling unit. Further, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, or a long subframe.
  • a TTI shorter than a 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, or a subslot.
  • a long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (eg, shortened TTI) is less than the TTI length of the long TTI and 1 ms. It may be replaced with a TTI having the above TTI length.
  • 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. Further, the RB may include one or a plurality of symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. One TTI and one subframe may each be composed of one or a plurality of resource blocks.
  • One or more RBs include physical resource blocks (PRB), sub-carrier groups (SCG), resource element groups (REG), PRB pairs, RB pairs, etc. May be called.
  • the resource block may be configured by one or a plurality of resource elements (RE: Resource Element).
  • RE Resource Element
  • 1RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • the structure of the above-described radio frame, subframe, slot, minislot, symbol, etc. is merely an example.
  • the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in the slot, the number of symbols and RBs included in the slot or minislot, and the RB The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be variously changed.
  • information, parameters, and the like described in the present disclosure may be expressed using absolute values, may be expressed using relative values from predetermined values, or may be expressed using other corresponding information. May be represented.
  • the radio resource may be indicated by a predetermined index.
  • the names used for parameters and the like in this disclosure are not limited names in any way.
  • various channels PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.
  • information elements can be identified by any suitable name, so the various channels and information elements assigned to them.
  • the name is not limited in any way.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • data, commands, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields 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, and the like may be input / output via a plurality of network nodes.
  • the input / output information, signals, etc. may be stored in a specific location (for example, a memory) or may be managed using a management table. Input / output information, signals, and the like can be overwritten, updated, or added. The output information, signals, etc. may be deleted. Input information, signals, and the like may be transmitted to other devices.
  • information notification includes physical layer signaling (eg, downlink control information (DCI), uplink control information (UCI)), upper layer signaling (eg, RRC (Radio Resource Control) signaling), It may be implemented by broadcast information (Master Information Block (MIB), System Information Block (SIB), 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 referred to as 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 (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
  • the MAC signaling may be notified using, for example, a MAC control element (MAC CE (Control Element)).
  • notification of predetermined information is not limited to explicit notification, but implicitly (for example, by not performing notification of the predetermined information or other information) May be performed).
  • the determination may be performed by a value represented by 1 bit (0 or 1), or may be performed by a boolean value represented by true or false.
  • the comparison may be performed by numerical comparison (for example, comparison with a predetermined value).
  • software, instructions, information, etc. may be transmitted / received via a transmission medium.
  • the software uses websites using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.) When transmitted from a server or other remote source, at least one of these wired and wireless technologies is included within the definition of a transmission medium.
  • system and “network” as used in this disclosure may be used interchangeably.
  • base station BS
  • radio base station fixed station
  • NodeB NodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • BWP Bandwidth Part
  • a base station may also be called terms such as a macro cell, a small cell, a femto cell, and a pico cell.
  • the base station can accommodate one or a plurality of (for example, three) cells (also called sectors). 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, an indoor small base station (RRH: Remote Radio Head)) can also provide communication services.
  • a base station subsystem eg, an indoor small base station (RRH: Remote Radio Head)
  • RRH Remote Radio Head
  • the terms “cell” or “sector” refer 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
  • Mobile station 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 term.
  • At least one of the base station and the mobile station may be referred to as a transmission device, a reception device, or the like.
  • the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
  • the moving body may be a vehicle (for example, a car, an airplane, etc.), an unattended moving body (for example, a drone, an autonomous driving vehicle, etc.), or a robot (manned 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.
  • the radio base station in the present disclosure may be replaced with a user terminal.
  • the communication between the radio base station and the user terminal is replaced with communication between a plurality of user terminals (for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc. may be called))
  • a plurality of user terminals for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc. may be called)
  • the user terminal 20 may have a function that the wireless base station 10 has.
  • words such as “up” and “down” may be read as words corresponding to communication between terminals (for example, “side”).
  • the uplink channel may be read as a side channel.
  • the user terminal in the present disclosure may be replaced with a radio base station.
  • the wireless base station 10 may have a function that the user terminal 20 has.
  • the operation performed by the base station may be performed by the upper node in some cases.
  • various operations performed for communication with a terminal may include a base station and one or more network nodes other than the base station (for example, It is obvious that this can be done by MME (Mobility Management Entity), S-GW (Serving-Gateway), etc., 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 switched according to execution.
  • the order of the processing procedures, sequences, flowcharts, and the like of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction.
  • the methods described in this disclosure present elements of the various steps in an exemplary order and are not limited to the specific order presented.
  • Each aspect / embodiment described in the present disclosure includes 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), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM (Registered trademark) (Global System for Mobile communications), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.
  • the present invention may be applied to a system using other appropriate wireless communication methods, a next-generation system extended based on these, and the like.
  • a plurality of systems may be combined and applied (for example, a combination of LTE or LTE-A and 5G).
  • the phrase“ based on ”does not mean“ based only on, ”unless expressly specified otherwise.
  • the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to elements using designations such as “first”, “second”, etc. as used in this disclosure does not generally limit the amount or order of those elements. These designations can be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, reference to the first and second elements does not mean that only two elements can be employed or that the first element must precede the second element in some way.
  • determining may encompass a wide variety of actions. For example, “determination (decision)” includes determination, calculation, calculation, processing, derivation, investigating, looking up (eg, table, (Searching in a database or another data structure), ascertaining, etc. may be considered to be “determining”.
  • determination (decision) includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), access ( accessing) (e.g., accessing data in memory), etc. may be considered to be “determining”.
  • determination is considered to be “determination (resolving)”, “selecting”, “choosing”, “establishing”, “comparing”, etc. Also good. That is, “determination (determination)” may be regarded as “determination (determination)” of some operation.
  • connection is 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”.
  • 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) region, and the like.

Landscapes

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

Abstract

Afin de transmettre de manière appropriée un canal partagé de liaison montante physique (par exemple, un PUSCH) qui ne comporte pas de canal de transport correspondant (par exemple, un UL-SCH), l'invention concerne un terminal utilisateur qui est caractérisé en ce qu'il comprend : une unité de réception qui reçoit des informations de commande de liaison descendante qui comprennent un premier champ qui indique un canal partagé de liaison montante physique sans canal de transport correspondant ; et une unité de commande qui, dans le cas où un second champ dans les informations de commande de liaison descendante indique une valeur d'indice spécifique, détermine le rapport de codage du canal partagé de liaison montante physique pour être un rapport de codage spécifique.
PCT/JP2019/020297 2018-05-23 2019-05-22 Terminal utilisateur WO2019225655A1 (fr)

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WO2023134363A1 (fr) * 2022-01-17 2023-07-20 华为技术有限公司 Procédé de codage, procédé de décodage et dispositif de communication

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115136636A (zh) * 2019-12-13 2022-09-30 株式会社Ntt都科摩 终端以及无线通信方法
WO2023134363A1 (fr) * 2022-01-17 2023-07-20 华为技术有限公司 Procédé de codage, procédé de décodage et dispositif de communication

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