WO2019138511A1 - Terminal utilisateur, et procédé de communication sans fil - Google Patents

Terminal utilisateur, et procédé de communication sans fil Download PDF

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Publication number
WO2019138511A1
WO2019138511A1 PCT/JP2018/000521 JP2018000521W WO2019138511A1 WO 2019138511 A1 WO2019138511 A1 WO 2019138511A1 JP 2018000521 W JP2018000521 W JP 2018000521W WO 2019138511 A1 WO2019138511 A1 WO 2019138511A1
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WO
WIPO (PCT)
Prior art keywords
user terminal
transmission
tbs
retransmission
unit
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PCT/JP2018/000521
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English (en)
Japanese (ja)
Inventor
翔平 吉岡
一樹 武田
聡 永田
Original Assignee
株式会社Ｎｔｔドコモ
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Priority to PCT/JP2018/000521 priority Critical patent/WO2019138511A1/fr
Publication of WO2019138511A1 publication Critical patent/WO2019138511A1/fr

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    • 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
    • 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
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters

Definitions

  • the present invention relates to a user terminal and a wireless communication method in a next-generation mobile communication system.
  • LTE Long Term Evolution
  • Non-Patent Document 1 LTE-A (LTE-Advanced), FRA (Future Radio Access), 4G, 5G, 5G + (plus), NR ( Also referred to as New RAT), LTE Rel. 14, 15 and so on.
  • the user terminal In the existing LTE system (for example, LTE Rel. 8-13), the user terminal (UE: User Equipment) is based on downlink control information (DCI: also referred to as Downlink Control Information, DL assignment, etc.) from the radio base station. Control reception of a downlink shared channel (for example, PDSCH: Physical Downlink Shared Channel). Also, 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).
  • DCI Downlink Control Information
  • the size of the transport block (transport block size (TBS: Transport Block Size)) for each number of resource blocks (PRBs: Physical Resource Blocks) (number of PRBs) and the TBS index
  • TBS Transport Block Size
  • PRBs Physical Resource Blocks
  • TBS table to be associated is predetermined.
  • a user terminal determines TBS using the said TBS table.
  • the same TBS is used between the time of initial transmission of TB, and the time of resending.
  • the TB for the initial transmission and the TB for retransmission are received on the receiving side (user terminal in downlink, wireless base station in uplink) It can be combined appropriately.
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • the user terminal does not use the TBS table used in the existing LTE system (eg, LTE Rel. 8-13), but does not use TBS. It is also considered to decide the
  • transmission conditions for example, the number of PRBs, the number of symbols, etc.
  • the number of demodulation reference signals (DMRS), modulation order, coding rate, at least one of the number of layers, etc. may be restricted, which may make it impossible to flexibly control TB transmission.
  • the present invention has been made in view of the above circumstances, and an object thereof is to provide a user terminal and a wireless communication method capable of flexibly controlling transmission of a transport block (TB).
  • TB transport block
  • One aspect of the user terminal of the present invention is a transmitting / receiving unit that performs at least one of reception and transmission of a transport block (TB), and a result of rounding a quantized intermediate number of information bits using a predetermined coefficient.
  • a controller configured to determine the size of the TB, wherein the predetermined coefficient includes at least a fixed value, the quantized intermediate number, and the number of code blocks included in the TB. It is characterized in that it is derived based on one.
  • One aspect of the user terminal of the present invention is a transceiver block for performing at least one of transport block (TB) reception and transmission, and a TB for the initial transmission based on downlink control information for scheduling the TB for the initial transmission. And a controller configured to determine the size of the TB for retransmission based on whether or not the size of B can be acquired.
  • TB transport block
  • controller configured to determine the size of the TB for retransmission based on whether or not the size of B can be acquired.
  • transport block (TB) transmission can be flexibly controlled.
  • FIG. 1A is a diagram showing an example of an MCS table in the existing LTE system
  • FIG. 1B is a diagram showing an example of a TBS table in the existing LTE system
  • FIG. 2A is a diagram showing an example of an MCS table in a future wireless communication system
  • FIG. 2B is a diagram showing an example of a quantization table in the future wireless communication system.
  • FIG. 3 is a flowchart illustrating an example of determination of a TBS for retransmission according to the second aspect.
  • FIG. 4 is a diagram showing an example of a schematic configuration of a wireless communication system according to the present embodiment.
  • FIG. 5 is a diagram showing an example of the entire configuration of the radio base station according to the present embodiment.
  • FIG. 6 is a diagram showing an example of a functional configuration of the radio base station according to the present embodiment.
  • FIG. 7 is a diagram showing an example of the entire configuration of the user terminal according to the present embodiment.
  • FIG. 8 is a diagram showing an example of a functional configuration of the user terminal according to the present embodiment.
  • FIG. 9 is a diagram showing an example of the hardware configuration of the radio base station and the user terminal according to the present embodiment.
  • FIG. 1 is a diagram showing an example of an MCS table (FIG. 1A) and a TBS table (FIG. 1B) in an existing LTE system (eg, LTE Rel. 8-13).
  • an MCS table that associates a modulation and coding scheme (MCS) index, a modulation order, and a TBS index is defined (see FIG. 1A).
  • MCS modulation and coding scheme
  • a TBS table is defined that associates a TBS index (II TBS ) with a TBS for each PRB number (N PRB ) (stored in the user terminal) Yes).
  • the user terminal receives DCI (DL assignment) for PDSCH scheduling, and determines the TBS index corresponding to the MCS index included in the DCI with reference to the MCS table (FIG. 1A). Do. Also, the user terminal refers to the TBS table (FIG. 1B) to determine, for the PDSCH, the TBS associated with the TBS index and the number of PRBs allocated to the PDSCH.
  • DCI DL assignment
  • TBS table FIG. 1B
  • the user terminal receives DCI (UL grant) for scheduling of PUSCH, refers to the MCS table (FIG. 1A), and a TBS index corresponding to the MCS index included in the DCI. Decide. Also, the user terminal refers to the TBS table (FIG. 1B) to determine, for the PUSCH, the TBS associated with the TBS index and the number of PRBs allocated to the PUSCH.
  • DCI UL grant
  • the MCS table FIG. 1A
  • TBS index corresponding to the MCS index included in the DCI. Decide.
  • the user terminal refers to the TBS table (FIG. 1B) to determine, for the PUSCH, the TBS associated with the TBS index and the number of PRBs allocated to the PUSCH.
  • the same TBS is used between the time of initial transmission of TB, and the time of resending.
  • TBS may correspond to different TBS indexes and different numbers of PRBs.
  • TBS "256" corresponding to TBS index "14" and PRB number "1” is the same as TBS "256" corresponding to TBS index "0" and PRB number "10".
  • the transmission conditions for example, the number of PRBs, the modulation scheme, the coding rate, etc.
  • the transmission conditions for example, the number of PRBs, the modulation scheme, the coding rate, etc.
  • the user terminal does not use the TBS table used in the existing LTE system (eg, LTE Rel. 8-13). It is also considered to determine TBS.
  • FIG. 2 is a diagram showing an example of an MCS table (FIG. 2A) and a table (FIG. 2B) for quantizing the number of resource elements (REs) per PRB in the future existing LTE system.
  • FIGS. 2A and 2B are merely examples, and are not limited to the illustrated values, some items (fields) may be deleted, and items not illustrated may be added.
  • a modulation order As shown in FIG. 2A, in the future wireless communication system, a modulation order, a coding rate (also referred to as an assumed coding rate, a target coding rate, etc.), the modulation order, and the coding
  • An MCS table may be defined (which may be stored at the user terminal) that associates an index (eg, an MCS index) indicating a rate.
  • an index eg, an MCS index
  • a table (quantization table) indicating quantized numbers (Quantized number of REs) of REs allocated to at least one of PDSCH and PUSCH in one PRB. ) May be defined (may be stored in the user terminal).
  • the user terminal determines TBS using at least one of the following steps 1) to 4).
  • steps 1) to 4 the determination of TBS for PDSCH is described as an example, but in the determination of TBS for PUSCH, “PDSCH” in steps 1) to 4) below is “PUSCH”. It can replace and apply suitably.
  • Step 1) The user terminal first determines the number of REs in the slot (N RE ). Specifically, the user terminal may determine the number of REs (N ′ RE ) assigned to PDSCH in one PRB, for example, by the following equation (1).
  • N sh symb is the number of symbols (eg, OFDM symbols) scheduled in a slot.
  • N PRB DMRS is the number of REs for DMRS per PRB in a scheduled period.
  • the number of REs for the DMRS may include overhead of a group related to code division multiplexing (CDM) of the DMRS indicated by DCI.
  • CDM code division multiplexing
  • N PRB oh may be a value configured by upper layer parameters.
  • N PRB oh is an overhead indicated by the upper layer parameter (Xoh-PDSCH), and may be any value of 0, 6, 12 or 18.
  • the user terminal quantizes the number of REs (N ′ RE ) allocated to PDSCH in one PRB using a quantization table (eg, FIG. 2B). For example, when the number of REs (N ′ RE ) determined using the above equation (1) is 9 or less, according to the quantization table shown in FIG. 2B, the number of quantized REs allocated to PDSCH in one PRB Is six.
  • the user terminal is based on the total number of REs assigned to PDSCH (N RE ), the number of quantized REs assigned to PDSCH in 1 PRB, and the total number of PRBs assigned to the user terminal (n PRB ). (For example, it determines by following formula (2)).
  • Step 2 The user terminal determines an intermediate number (N info ) of information bits, for example, using equation (3).
  • N RE is the total number of REs assigned to PDSCH.
  • R is the coding rate associated with the MCS index included in the DCI in the MCS table (eg, FIG. 2A).
  • Q m is a modulation order associated with the MCS index included in the DCI in the MCS table.
  • v is the number of PDSCH layers.
  • Step 3) If the middle number (N info ) of the information bits determined in step 2) is equal to or less than (or less than) a predetermined threshold (eg, 3824), the user terminal quantizes the middle number and the quantized middle is The closest TBSs that are not less than N'info may be found from a predetermined table (e.g., a table that associates TBSs with indexes).
  • a predetermined threshold e.g. 3824
  • Step 4) On the other hand, if the middle number (N info ) of the information bits determined in step 2) is larger than (or more than) a predetermined threshold (for example, 3824), the user terminal uses, for example, equation (4).
  • the intermediate number (N info ) may be quantized to determine a quantized intermediate number (N ' info ).
  • the user terminal is For example, TBS may be determined using the following equation (5).
  • N'info is, for example, an intermediate number quantized using the above equation (4).
  • C may be the number of code blocks (CB: code bock) into which TB is divided.
  • the user terminal may determine TBS using, for example, the following formula (6).
  • the coding rate (R) is equal to or less than (or less than) a predetermined threshold (for example, 1 ⁇ 4)
  • the quantized intermediate number (N ′ info) is a predetermined threshold (for example, 8424)
  • a user terminal may determine TBS, for example using a following formula (7).
  • the user terminal is required to at least the number of REs (N RE ), the coding rate (R), the modulation order (Qm) and the number of layers available for PDSCH or PUSCH in the slot.
  • N RE the number of REs
  • R the coding rate
  • Qm the modulation order
  • N info the number of layers available for PDSCH or PUSCH in the slot.
  • the present inventors pay attention to the fact that the same TBS can be easily calculated by changing a predetermined coefficient used for rounding the quantized intermediate number (N'info), and the above transmission conditions are different.
  • N'info quantized intermediate number
  • the present inventors adjust the TBS at the time of retransmission so as to be the same TBS as at the time of the first transmission, thereby changing the predetermined coefficient used for rounding the quantized intermediate number (N'info). It was conceived to realize flexible retransmission of TB without changing it (for example, without changing the above equations (5) to (7)) (second aspect).
  • this embodiment can be used to determine at least one of TBS for PDSCH and TBS for PUSCH.
  • the TBS calculation formula (for example, at least one of the above formulas (5) to (7)) based on the quantized intermediate number (N'info) of the information bit has a larger number of It is determined that the same TBS can be found.
  • TBS is calculated based on the result of rounding.
  • the predetermined coefficient may be a value determined based on the predetermined value X (for example, 8X (multiplied value of 8 and X)).
  • the predetermined value X may be a fixed value (for example, X> 1).
  • the predetermined value X may be determined based on at least one of the following parameters.
  • N'info quantized intermediate number
  • Ninfo Intermediate number of information bits before quantization
  • the number of REs assigned to PDSCH or PUSCH in a slot (N RE ) ⁇ Code rate (R) associated with MCS index in DCI Modulation order (Qm) associated with MCS index in DCI -Number of layers (v) -CRC bit number (for example, 24) ⁇ Number of subcarriers per 1 PRB (N RB SC ) ⁇ Number of symbols scheduled in the slot (N sh symb )
  • N DMRS Maximum size of code block
  • the predetermined value X is upper layer signaling (for example, RRC (Radio Resource Control) signaling, broadcast information (for example, MIB: Master Information Block), system information (for example, SIB: System Information Block, RMSI: Remaining Minimum System Information) Etc.) may be configured.
  • RRC Radio Resource Control
  • broadcast information for example, MIB: Master Information Block
  • system information for example, SIB: System Information Block, RMSI: Remaining Minimum System Information
  • Etc. Remaining Minimum System Information
  • the predetermined value X may be included in the DCI.
  • the predetermined value X may be determined by higher layer signaling and DCI.
  • the user terminal may determine TBS using equation (8) below instead of equation (5).
  • the coding rate (R) associated with the MCS index in the DCI in the MCS table is equal to or less than (or less than) a predetermined threshold (eg, 1/4)
  • a predetermined threshold eg, 1/4
  • the present invention is not limited thereto, and may be used under other conditions.
  • the coding rate (R) is larger than (or more than) a predetermined threshold (for example, 1 ⁇ 4), and the intermediate number (N ′) of quantized information bits
  • a predetermined threshold for example, 1 ⁇ 4
  • info is used when it is larger than (or more than) a predetermined threshold (for example, 8424)
  • the user terminal may determine TBS using the following equation (10) instead of the above equation (7).
  • the coding rate (R) is equal to or less than (or less than) a predetermined threshold (for example, 1 ⁇ 4), and the quantized intermediate number (N ′ info) is predetermined.
  • a threshold e.g., 8424
  • the quantized intermediate number (N'info) of information bits is calculated using, for example, the above equation (4), but the intermediate number of information bits (Ninfo) The number may be determined in any way as long as it is a quantized number.
  • the middle number (Ninfo) of information bits is based on at least one of the number of REs (N RE ) available to PDSCH or PUSCH in a slot (N RE ), coding rate (R), modulation order (Qm), and number of layers. Although it shall be calculated (for example, by said Formula (3)), it is not restricted to this. Similarly, the number of REs (N RE ) available for PDSCH or PUSCH in a slot is also calculated using Equations (1) and (2) above, but is not limited thereto.
  • the user terminal adjusts TBS at the time of retransmission so as to be the same TBS as at the time of initial transmission.
  • the second aspect includes an MCS index (eg, 0-28 in FIG. 2A) to which a coding rate (R) is associated in the MCS table (eg, FIG. 2A) (the coding rate is not reserved). It may be applied when DCI is detected.
  • the user terminal performs scheduling for initial transmission of TB (for example, upon successful decoding of toggled new data identifier (NDI: DCI including New Data Indicator), according to steps 1) to 4 above, for initial transmission Acquire TBS.
  • NDI toggled new data identifier
  • the user terminal assumes that the TBS for retransmission of the TB is the same as the TBS for the initial transmission. Specifically, the user terminal may determine whether or not the TBS for retransmission calculated based on DCI (for example, DCI including NDI not toggled) that schedules retransmission of the TB is different from the TBS for initial transmission.
  • the TBS for retransmission may be determined to be the same as the TBS for initial transmission regardless of.
  • the above steps 1) to 4) based on DCI for scheduling retransmission of the TB It is possible to omit the calculation of TBS for retransmission by.
  • the TBS for retransmission may be determined by at least one of the following methods (1) and (2).
  • the following methods (1) and (2) may be used regardless of whether or not acquisition of TBS for initial transmission fails.
  • TBS for retransmission may be determined.
  • DCI for example, DCI including non-toggled NDI
  • TBS based on may be determined as TBS for retransmission.
  • the TBS for retransmission may be determined based on the result of addition of the TBS calculated based on the DCI and the offset Y.
  • the value of the predetermined offset Y may be determined in advance in a specification, or may be notified from the radio base station to the user terminal using at least one of higher layer signaling and DCI. Also, the presence or absence of the predetermined offset Y may be notified from the radio base station to the user terminal using DCI.
  • FIG. 3 is a diagram illustrating an example of determination of a TBS for retransmission according to the second aspect.
  • the combination of the said method (1) and (2) is shown in FIG. 3, the said method (1) or (2) may be used independently.
  • the user terminal first determines the TBS for retransmission using the above method (1), and decodes the TB for retransmission based on the determined TBS (step S101).
  • the user terminal determines whether or not the TBS for retransmission determined in step S101 is correct based on the decoding result of the TB for retransmission (step S102).
  • the user terminal may assume that the TBS is correct if no error is detected by the CRC bits of at least one CB in the TB based on the determined TBS.
  • step S102 If it is determined that the determined TBS for retransmission is correct (step S102; YES), this operation ends.
  • step S102; NO the user terminal determines the TBS for retransmission using the above method (2), and performs retransmission based on the determined TBS. And restore the TB for (step S103).
  • the offset Y used in the method (2) is controlled based on the TBS determined (changed to different values), Decoding of the TB may be repeated.
  • the determination (step S102) as to whether or not the TBS for retransmission determined using the method (1) is correct is whether or not a predetermined offset Y is notified to the user terminal, or the TBS for retransmission This may be performed based on whether or not the presence or absence of the offset for the is notified.
  • the user terminal may proceed to step 103 when receiving information (offset information) indicating a predetermined offset Y from the radio base station, and may end the operation when not receiving the offset information. .
  • the process proceeds to step S103, and even when the DCI is not received, the user terminal ends this operation. Good.
  • the coefficient used for rounding the quantized intermediate number (N'info) (for example, the above equation It is possible to realize flexible retransmission of TB without changing (5) to (7).
  • wireless communication system Wireless communication system
  • the wireless communication method according to each of the above aspects is applied.
  • the wireless communication methods according to the above aspects may be applied singly or in combination of at least two.
  • FIG. 4 is a diagram showing an example of a schematic configuration of a wireless communication system according to the present embodiment.
  • the radio communication system 1 applies 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 integrated. can do.
  • the wireless communication system 1 is called SUPER 3G, LTE-A (LTE-Advanced), IMT-Advanced, 4G, 5G, Future Radio Access (FRA), New Radio Access Technology (NR), etc. Also good.
  • the radio communication system 1 shown in FIG. 4 includes a radio base station 11 forming a macrocell C1, and radio base stations 12a to 12c disposed in the macrocell C1 and forming a small cell C2 narrower than the macrocell C1. .
  • the user terminal 20 is arrange
  • the configuration may be such that different numerologies are applied between cells and / or in cells.
  • the term “neurology” refers to communication parameters in the frequency direction and / or time direction (eg, subcarrier spacing (subcarrier spacing), bandwidth, symbol length, CP time length (CP length), subframe length , TTI time length (TTI length), number of symbols per TTI, radio frame configuration, filtering process, windowing process, etc.).
  • subcarrier intervals such as 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may be supported.
  • the user terminal 20 can be connected to both the radio base station 11 and the radio base station 12.
  • the user terminal 20 is assumed to simultaneously use the macro cell C1 and the small cell C2 using different frequencies by CA or DC.
  • the user terminal 20 can apply CA or DC using a plurality of cells (CCs) (for example, two or more CCs).
  • the user terminal can use the license band CC and the unlicensed band CC as a plurality of cells.
  • the user terminal 20 can perform communication using time division duplex (TDD) or frequency division duplex (FDD) in each cell.
  • TDD time division duplex
  • FDD frequency division duplex
  • the TDD cell and the FDD cell may be referred to as a TDD carrier (frame configuration type 2), an FDD carrier (frame configuration type 1) and the like, respectively.
  • a single numerology may be applied, or a plurality of different numerologies may be applied.
  • Communication can be performed between the user terminal 20 and the radio base station 11 using a relatively low frequency band (for example, 2 GHz) and a carrier having a narrow bandwidth (referred to as an existing carrier, Legacy carrier, etc.).
  • a carrier having a wide bandwidth in a relatively high frequency band for example, 3.5 GHz, 5 GHz, 30 to 70 GHz, etc.
  • the same carrier as that for the base station 11 may be used.
  • the configuration of the frequency band used by each wireless base station is not limited to this.
  • a wired connection for example, an optical fiber conforming to a Common Public Radio Interface (CPRI), an X2 interface, etc.
  • a wireless connection Can be configured.
  • 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 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. Further, each wireless base station 12 may be connected to the higher station apparatus 30 via the wireless base station 11.
  • RNC radio network controller
  • MME mobility management entity
  • 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 gNB (gNodeB), a transmission / reception point (TRP), etc. Good.
  • the radio base station 12 is a radio base station having a local coverage, and is 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), an eNB , GNB, transmission / reception points, etc.
  • the radio base stations 11 and 12 are not distinguished, they are collectively referred to as the radio base station 10.
  • Each user terminal 20 is an LTE, LTE-A, 5G, 5G +, NR, Rel.
  • Terminals compatible with various communication schemes such as 15 and so on may include not only mobile communication terminals but also fixed communication terminals. Also, the user terminal 20 can perform inter-terminal communication (D2D) with another user terminal 20.
  • D2D inter-terminal communication
  • 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 to perform communication.
  • SC-FDMA is a single carrier transmission scheme that divides the system bandwidth into bands consisting of one or continuous resource blocks for each terminal, and a plurality of terminals use different bands to reduce interference between the terminals. is there.
  • the uplink and downlink radio access schemes are not limited to these combinations, and OFDMA may be used in UL.
  • a multicarrier waveform for example, an OFDM waveform
  • a single carrier waveform for example, a DFT-s-OFDM waveform
  • DL shared channels DL shared channels (PDSCH: also referred to as Physical Downlink Shared Channel, also referred to as downlink data channels) shared by each user terminal 20, broadcast channels (PBCH: Physical Broadcast Channel), An L1 / L2 control channel or the like is used.
  • PBCH Physical Broadcast Channel
  • SIB System Information Block
  • MIB Master Information Block
  • the L1 / L2 control channel includes a downlink control channel (PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel)), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel), etc. .
  • Downlink control information (DCI) including scheduling information of PDSCH and PUSCH is transmitted by PDCCH.
  • the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
  • the EPDCCH is frequency division multiplexed with the PDSCH, and is used for transmission such as DCI as the PDCCH.
  • HARQ acknowledgment information ACK / NACK
  • an uplink shared channel (PUSCH: also referred to as physical uplink shared channel, uplink data channel etc.) shared by each user terminal 20, an uplink control channel (PUCCH: physical uplink control channel) ), Random access channel (PRACH: Physical Random Access Channel) or the like.
  • PUSCH uplink shared channel
  • PUCCH physical uplink control channel
  • PRACH Random access channel
  • User data and higher layer control information are transmitted by PUSCH.
  • Uplink control information (UCI: Uplink Control Information) including at least one of delivery confirmation information (A / N) of downlink (DL) signals and channel state information (CSI) is transmitted by PUSCH or PUCCH.
  • the PRACH can transmit a random access preamble for establishing a connection with a cell.
  • FIG. 5 is a diagram showing an example of the entire configuration of the radio base station according to the present embodiment.
  • the radio base station 10 includes a plurality of transmitting and receiving antennas 101, an amplifier unit 102, a transmitting and receiving unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106.
  • Each of the transmitting and receiving antenna 101, the amplifier unit 102, and the transmitting and receiving unit 103 may be configured to include one or more.
  • User data transmitted from the radio base station 10 to the user terminal 20 in downlink is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.
  • the baseband signal processing unit 104 performs packet data convergence protocol (PDCP) layer processing, user data division / combination, RLC layer transmission processing such as RLC (Radio Link Control) retransmission control, and MAC (Medium Access) for user data.
  • Control Retransmission control (for example, transmission processing of HARQ (Hybrid Automatic Repeat reQuest)), scheduling, transmission format selection, channel coding, transmission processing such as inverse fast Fourier transform (IFFT) processing, precoding processing, etc. Is transferred to the transmission / reception unit 103.
  • transmission processing such as channel coding and inverse fast Fourier transform is performed and transferred to the transmission / reception unit 103.
  • the transmission / reception unit 103 converts the baseband signal output from the baseband signal processing unit 104 for each antenna into a radio frequency band and transmits the baseband signal.
  • the radio frequency signal frequency-converted by the transmitting and receiving unit 103 is amplified by the amplifier unit 102 and transmitted from the transmitting and receiving antenna 101.
  • the transmitter / receiver, the transmitting / receiving circuit or the transmitting / receiving device described based on the common recognition in the technical field according to the present invention can be constituted.
  • the transmitting and receiving unit 103 may be configured as an integrated transmitting and receiving unit, or may be configured from a transmitting unit and a receiving unit.
  • the radio frequency signal received by the transmitting and receiving antenna 101 is amplified by the amplifier unit 102.
  • the transmitting and receiving unit 103 receives the UL signal amplified by the amplifier unit 102.
  • the transmission / reception unit 103 frequency-converts the received signal into a baseband signal and outputs the result to the baseband signal processing unit 104.
  • the baseband signal processing unit 104 performs Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing, and error correction on UL data included in the input UL signal. Decoding, reception processing of MAC retransmission control, and reception processing of RLC layer and PDCP layer are performed, and are transferred to the higher station apparatus 30 via the transmission path interface 106.
  • the call processing unit 105 performs call processing such as setting and release of communication channels, status management of the wireless base station 10, and management of wireless resources.
  • the transmission path interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface. Also, the transmission path interface 106 transmits / receives signals (backhaul signaling) to / from the adjacent wireless base station 10 via an inter-base station interface (for example, an optical fiber conforming to CPRI (Common Public Radio Interface), X2 interface). It is also good.
  • an inter-base station interface for example, an optical fiber conforming to CPRI (Common Public Radio Interface), X2 interface.
  • the transmitting / receiving unit 103 transmits a downlink (DL) signal (including at least one of DL data signal, DL control signal, and DL reference signal) to the user terminal 20, and uplink (UL) from the user terminal 20. 2.) receiving a signal (including at least one of a UL data signal, a UL control signal, and a UL reference signal).
  • DL downlink
  • UL uplink
  • the transmission / reception unit 103 transmits DCI to the user terminal 20 using the downlink control channel.
  • the transmitting / receiving unit 103 may transmit control information (upper layer control information) by higher layer signaling.
  • the transmitting / receiving unit 103 transmits data (transport block (TB)) to the user terminal 20 using the downlink shared channel, and receives data (TB) from the user terminal 20 using the uplink shared channel. Good.
  • FIG. 6 is a diagram showing an example of a functional configuration of the radio base station according to the present embodiment. 6 mainly shows the functional blocks of the characteristic part in the present embodiment, and it is assumed that the wireless base station 10 also has other functional blocks necessary for wireless communication.
  • the baseband signal processing unit 104 includes a control unit 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305.
  • the control unit 301 controls the entire wireless base station 10.
  • the control unit 301 may, for example, generate a DL signal by the transmission signal generation unit 302, mapping the DL signal by the mapping unit 303, receive processing (for example, demodulation) of the UL signal by the reception signal processing unit 304, Control the measurement.
  • control unit 301 performs scheduling of the user terminal 20. Specifically, the control unit 301 may perform scheduling and / or retransmission control of the downlink shared channel and / or the uplink shared channel.
  • control unit 301 may control the generation of DCI.
  • the DCI (DL assignment) used for scheduling of the downlink shared channel may include an MCS index and information indicating the number of PRBs allocated to the downlink shared channel.
  • the DCI (UL grant) used for uplink shared channel scheduling may include an MCS index and information indicating the number of PRBs allocated to the downlink shared channel.
  • control unit 301 may control at least one of transport block (TB) transmission using a downlink shared channel and reception of TB using an uplink shared channel.
  • TB transport block
  • control unit 301 may determine the size (TBS) of the TB based on the DCI.
  • the control unit 301 refers to the MCS table (FIG. 2A), determines the coding rate and modulation order corresponding to the MCS index included in DCI, and determines TBS using, for example, the above steps 1) to 4). May be
  • control unit 301 may determine the size of the TB based on the result of rounding the quantized intermediate number of information bits using a predetermined coefficient (first aspect).
  • the predetermined coefficient may be derived based on at least one of a fixed value, the quantized intermediate number, and the number of code blocks included in the TB.
  • control unit 301 determines the size of the retransmission TB based on whether or not the size of the first transmission TB can be obtained based on the downlink control information for scheduling the first transmission TB. Good (second aspect).
  • control unit 301 may assume that the size of the TB for retransmission is the same as the size of the TB for initial transmission (method (1)).
  • control unit 301 may determine the size of the TB for retransmission based on the downlink control information for scheduling the TB for retransmission (a method (2 )).
  • the control unit 301 uses the size of the TB for retransmission determined based on the downlink control information for scheduling the TB for retransmission using a predetermined offset. It may be corrected (FIG. 3).
  • the control unit 301 can be configured of a controller, a control circuit, or a control device described based on the common recognition in the technical field according to the present invention.
  • the transmission signal generation unit 302 generates a DL signal (including a DL data signal, a DL control signal, and a DL reference signal) based on an instruction from the control unit 301, and outputs the DL signal to the mapping unit 303.
  • the transmission signal generation unit 302 can be a signal generator, a signal generation circuit or a signal generation device described based on the common recognition in the technical field according to the present invention.
  • the mapping unit 303 maps the DL signal generated by the transmission signal generation unit 302 on a predetermined radio resource based on an instruction from the control unit 301, and outputs the DL signal to the transmission / reception unit 103.
  • the mapping unit 303 may be a mapper, a mapping circuit or a mapping device described based on the common recognition in the technical field according to the present invention.
  • the reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, decoding, etc.) on a UL signal (for example, including UL data signal, UL control signal, UL reference signal) transmitted from the user terminal 20. I do. Specifically, the reception signal processing unit 304 may output the reception signal or the signal after reception processing to the measurement unit 305. Further, the reception signal processing unit 304 performs UCI reception processing based on the uplink control channel configuration instructed by the control unit 301.
  • reception processing for example, demapping, demodulation, decoding, etc.
  • the measurement unit 305 performs measurement on the received signal.
  • the measuring unit 305 can be configured from a measuring device, a measuring circuit or a measuring device described based on the common recognition in the technical field according to the present invention.
  • the measurement unit 305 measures the channel quality of UL based on, for example, received power (for example, RSRP (Reference Signal Received Power)) and / or received quality (for example, RSRQ (Reference Signal Received Quality)) of the UL reference signal. You may The measurement result may be output to the control unit 301.
  • received power for example, RSRP (Reference Signal Received Power)
  • RSRQ Reference Signal Received Quality
  • FIG. 7 is a diagram showing an example of the entire configuration of the user terminal according to the present embodiment.
  • the user terminal 20 includes a plurality of transmission / reception antennas 201 for MIMO transmission, an amplifier unit 202, a transmission / reception unit 203, a baseband signal processing unit 204, and an application unit 205.
  • the radio frequency signals received by the plurality of transmitting and receiving antennas 201 are amplified by the amplifier unit 202, respectively.
  • Each transmission / reception unit 203 receives the DL signal amplified by the amplifier unit 202.
  • the transmission / reception unit 203 frequency-converts the received signal into a baseband signal and outputs the result to the baseband signal processing unit 204.
  • the baseband signal processing unit 204 performs reception processing of FFT processing, error correction decoding, retransmission control, and the like on the input baseband signal.
  • the DL data is transferred to the application unit 205.
  • the application unit 205 performs processing on a layer higher than the physical layer and the MAC layer. Also, broadcast information is also transferred to the application unit 205.
  • uplink (UL) data is input from the application unit 205 to the baseband signal processing unit 204.
  • the baseband signal processing unit 204 performs transmission processing of retransmission control (for example, transmission processing of HARQ), channel coding, rate matching, puncturing, discrete Fourier transform (DFT) processing, IFFT processing, etc. Is transferred to each transmission / reception unit 203. Also for UCI, at least one of channel coding, rate matching, puncturing, DFT processing, and IFFT processing is performed and transferred to each transmission / reception unit 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 transmitting and receiving unit 203 is amplified by the amplifier unit 202 and transmitted from the transmitting and receiving antenna 201.
  • the transmitting / receiving unit 203 receives a downstream (DL) signal (including a DL data signal, a DL control signal, and a DL reference signal) of the neurology set in the user terminal 20, and the uplink (UL) of the neurology.
  • DL downstream
  • UL uplink
  • Send a signal including UL data signal, UL control signal, UL reference signal).
  • the transmission / reception unit 203 receives DCI for the user terminal 20 using the downlink control channel. Also, the transmitting / receiving unit 203 may receive control information (upper layer control information) by higher layer signaling. Also, the transmitting / receiving unit 203 may receive data (transport block (TB)) for the user terminal 20 using the downlink shared channel, and transmit data (TB) from the user terminal 20 using the uplink shared channel. Good.
  • the transmission / reception unit 203 can be a transmitter / receiver, a transmission / reception circuit or a transmission / reception device described based on the common recognition in the technical field according to the present invention.
  • 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.
  • FIG. 8 is a diagram showing an example of a functional configuration of the user terminal according to the present embodiment.
  • the functional block of the characteristic part in this Embodiment is mainly shown, and it is assumed that the user terminal 20 also has the other functional block required for wireless communication.
  • the baseband signal processing unit 204 included in the user terminal 20 includes 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. Have.
  • the control unit 401 controls the entire user terminal 20.
  • the control unit 401 controls, for example, UL signal generation by the transmission signal generation unit 402, mapping of the UL signal by the mapping unit 403, reception processing of the DL signal by the reception signal processing unit 404, and measurement by the measurement unit 405.
  • control unit 401 may control at least one of transmission of a transport block (TB) using a downlink shared channel and reception of TB using an uplink shared channel based on DCI.
  • TB transport block
  • control unit 401 may determine the size (TBS) of the TB based on the DCI.
  • the control unit 401 refers to the MCS table (FIG. 2A), determines the coding rate and modulation order corresponding to the MCS index included in DCI, and determines TBS using, for example, the above steps 1) to 4). May be
  • control unit 401 may determine the size of the TB based on the result of rounding the quantized intermediate number of information bits using a predetermined coefficient (first aspect).
  • the predetermined coefficient may be derived based on at least one of a fixed value, the quantized intermediate number, and the number of code blocks included in the TB.
  • control unit 401 determines the size of the retransmission TB based on whether or not the size of the first transmission TB can be obtained based on the downlink control information for scheduling the first transmission TB. Good (second aspect).
  • control unit 401 may assume that the size of the TB for retransmission is the same as the size of the TB for initial transmission (method (1)).
  • control unit 401 may determine the size of the TB for retransmission based on the downlink control information for scheduling the TB for retransmission (a method (2 )).
  • the control unit 401 uses the size of the TB for retransmission determined based on the downlink control information for scheduling the TB for retransmission using a predetermined offset. It may be corrected (FIG. 3).
  • the control unit 401 can be configured of a controller, a control circuit, or a control device described based on the common recognition in the technical field according to the present invention.
  • the transmission signal generation unit 402 generates a UL signal (including a UL data signal, a UL control signal, a UL reference signal, and UCI) based on an instruction from the control unit 401 (for example, coding, rate matching, puncturing, modulation) Etc., and output to the mapping unit 403.
  • the transmission signal generation unit 402 can be a signal generator, a signal generation circuit, or a signal generation device described based on the common recognition in the technical field according to the present invention.
  • the mapping unit 403 maps the UL 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 UL signal to the transmission / reception unit 203.
  • the mapping unit 403 may be a mapper, a mapping circuit or a mapping device described based on the common recognition in the technical field according to the present invention.
  • the reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the DL signal (DL data signal, scheduling information, DL control signal, DL reference signal).
  • the received signal processing unit 404 outputs the information received from the radio base station 10 to the control unit 401.
  • the reception signal processing unit 404 outputs, for example, broadcast information, system information, upper layer control information by upper layer signaling such as RRC signaling, physical layer control information (L1 / L2 control information), and the like to the control unit 401.
  • the received signal processing unit 404 can be composed of a signal processor, a signal processing circuit or a signal processing device described based on the common recognition in the technical field according to the present invention. Also, the received signal processing unit 404 can constitute a receiving unit according to the present invention.
  • Measuring section 405 measures a channel state based on a reference signal (for example, CSI-RS) from radio base station 10, and outputs the measurement result to control section 401.
  • the channel state measurement may be performed for each CC.
  • the measuring unit 405 can be configured of a signal processor, a signal processing circuit or a signal processing device, and a measuring instrument, a measuring circuit or a measuring device described based on the common recognition in the technical field according to the present invention.
  • each functional block is realized using one physically and / or logically coupled device, or directly and / or two or more physically and / or logically separated devices. Or it may connect indirectly (for example, using a wire communication and / or radio), and it may be realized using a plurality of these devices.
  • a wireless base station, a user terminal, and the like in an embodiment of the present invention may function as a computer that performs the processing of the wireless communication method of the present invention.
  • FIG. 9 is a diagram showing an example of the hardware configuration of the radio base station and the user terminal according to the present embodiment.
  • the above-described wireless 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. Good.
  • the term “device” can be read as a circuit, a device, a unit, or the like.
  • the hardware configuration of the radio base station 10 and the user terminal 20 may be configured to include one or more of the devices illustrated in the figure, or may be configured without including 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 read predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and the communication device 1004 is performed. This is realized by controlling communication, and controlling reading and / or writing of data in the memory 1002 and the storage 1003.
  • the processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU) 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 a program (program code), a software module, data, and the like from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these.
  • a program a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used.
  • 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, or may be realized similarly for other functional blocks.
  • the memory 1002 is a computer readable recording medium, and for example, at least at least a read only memory (ROM), an erasable programmable ROM (EPROM), an electrically EPROM (EEPROM), a random access memory (RAM), 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 may 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 invention.
  • the storage 1003 is a computer readable recording medium, and for example, 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 disk, Blu-ray® disc), removable disc, hard disc drive, smart card, flash memory device (eg card, stick, key drive), magnetic stripe, database, server, at least one other suitable storage medium May be configured by The storage 1003 may be called an auxiliary storage device.
  • a computer readable recording medium for example, 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 disk, Blu-ray® disc), removable disc, hard disc drive, smart card, flash memory device (eg card, stick, key drive), magnetic stripe, database, server, at least one other suitable storage medium May be configured by
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, 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 to realize, for example, frequency division duplex (FDD) and / or time division duplex (TDD). It 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 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, and the like) that receives an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, and the like) that performs output to the outside.
  • the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
  • each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using different buses between devices.
  • radio base station 10 and the user terminal 20 may be microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASICs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), etc.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • Hardware may be included, and part or all of each functional block may be realized using the hardware.
  • processor 1001 may be implemented using at least one of these hardware.
  • the channels and / or symbols may be signaling.
  • the signal may be a message.
  • the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot (Pilot), a pilot signal or the like according to an applied standard.
  • a component carrier CC: Component Carrier
  • CC Component Carrier
  • the radio frame may be configured by one or more periods (frames) in the time domain.
  • Each of the one or more periods (frames) that constitute a radio frame may be referred to as a subframe.
  • a subframe may be configured by one or more slots in the time domain.
  • the subframes may be of a fixed time length (e.g., 1 ms) independent of the neurology.
  • the slot may be configured by one or more symbols in the time domain (such as orthogonal frequency division multiplexing (OFDM) symbols, single carrier frequency division multiple access (SC-FDMA) symbols, etc.).
  • the slot may be a time unit based on the neurology.
  • the slot may include a plurality of minislots. Each minislot may be configured by one or more symbols in the time domain. Minislots may also be referred to as subslots.
  • a radio frame, a subframe, a slot, a minislot and a symbol all represent time units when transmitting a signal.
  • subframes, slots, minislots and symbols other names corresponding to each may be used.
  • one subframe may be referred to as a transmission time interval (TTI)
  • TTI transmission time interval
  • a plurality of consecutive subframes may be referred to as a TTI
  • one slot or one minislot may be referred to as a TTI.
  • TTI transmission time interval
  • the subframe and / or TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be.
  • the unit representing TTI may be called a slot, a minislot, etc. instead of a subframe.
  • TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
  • the radio base station performs scheduling to assign radio resources (frequency bandwidth usable in each user terminal, transmission power, etc.) to each user terminal in TTI units.
  • radio resources frequency bandwidth usable in each user terminal, transmission power, etc.
  • the TTI may be a transmission time unit of a channel encoded data packet (transport block), a code block, and / or a codeword, or may be a processing unit such as scheduling and link adaptation. Note that, when a TTI is given, the time interval (eg, the number of symbols) in which the transport block, the code block, and / or the codeword is actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit of scheduling.
  • the number of slots (the number of minislots) 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, or the like.
  • a TTI shorter than a normal TTI may be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, or the like.
  • a long TTI for example, a normal TTI, a subframe, etc.
  • a short TTI eg, a shortened TTI, etc.
  • a resource block is a resource allocation unit in time domain and frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. Also, an RB may include one or more symbols in the time domain, and may be one slot, one minislot, one subframe, or one TTI in length. One TTI and one subframe may be respectively configured by one or more resource blocks. Note that one or more RBs may be 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, etc. It may be called.
  • PRB Physical resource block
  • SCG Sub-Carrier Group
  • REG Resource Element Group
  • a resource block may be configured by one or more resource elements (RE: Resource Element).
  • RE Resource Element
  • one RE may be one subcarrier and one symbol radio resource region.
  • the above-described structures such as the radio frame, subframe, slot, minislot and symbol 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 number of subcarriers, as well as the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be variously changed.
  • the information, parameters, etc. described in the present specification may be expressed using absolute values, may be expressed using relative values from predetermined values, or other corresponding information. May be represented.
  • radio resources may be indicated by a predetermined index.
  • the names used for parameters and the like in the present specification are not limited names in any respect.
  • various channels PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.
  • information elements can be identified by any suitable names, various assignments are made to these various channels and information elements.
  • the name is not limited in any way.
  • data, instructions, commands, information, signals, bits, symbols, chips etc may be voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any of these May be represented by a combination of
  • information, signals, etc. may be output from the upper layer to the lower layer and / or from the lower layer to the upper layer.
  • Information, signals, etc. may be input / output via a plurality of network nodes.
  • the input / output information, signals and the like may be stored in a specific place (for example, a memory) or may be managed using a management table. Information, signals, etc. input and output can be overwritten, updated or added. The output information, signals and the like may be deleted. The input information, signals and the like may be transmitted to other devices.
  • notification of information is not limited to the aspects / embodiments described herein, and may be performed using other methods.
  • notification of information may be 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 called L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like.
  • 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.
  • 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 notifying the predetermined information or other information Notification may be performed).
  • the determination may be performed by a value (0 or 1) represented by one bit, or may be performed by a boolean value represented by true or false. , Numerical comparison (for example, comparison with a predetermined value) may be performed.
  • Software may be called software, firmware, middleware, microcode, hardware description language, or any other name, and may be instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules. Should be interpreted broadly to mean applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc.
  • software, instructions, information, etc. may be sent and received via a transmission medium.
  • software may use a wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and / or a wireless technology (infrared, microwave, etc.), a website, a server
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • system and "network” as used herein may be used interchangeably.
  • base station Base Station
  • radio base station eNB
  • gNB gNodeB
  • cell cell
  • cell group cell group
  • carrier carrier
  • carrier carrier
  • a base station may be called in terms of a fixed station (Node station), NodeB, eNodeB (eNB), access point (access point), transmission point, reception point, transmission / reception point, femtocell, small cell, and the like.
  • a base station may accommodate one or more (e.g., 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, a small base station for indoor use (RRH: Communication service can also be provided by Remote Radio Head).
  • RRH Communication service can also be provided by Remote Radio Head.
  • the terms "cell” or “sector” refer to part or all of the coverage area of a base station and / or a base station subsystem serving communication services in this coverage.
  • MS mobile station
  • UE user equipment
  • the 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 term.
  • the base station and / or the mobile station may be called a transmitting device, a receiving device, etc.
  • the radio base station in the present specification may be replaced with a user terminal.
  • each aspect / embodiment of the present invention may be applied to a configuration in which communication between a wireless base station and a user terminal is replaced with communication between a plurality of user terminals (D2D: Device-to-Device).
  • the user terminal 20 may have a function that the above-described radio base station 10 has.
  • the wordings such as "up” and “down” may be read as "side".
  • the upstream channel may be read as a side channel.
  • a user terminal herein may be read at a radio base station.
  • the radio base station 10 may have a function that the above-described user terminal 20 has.
  • the operation supposed to be performed by the base station may be performed by its upper node in some cases.
  • various operations performed for communication with a terminal may be a base station, one or more network nodes other than the base station (eg, It is apparent that this can be performed 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 specification 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 .20, UWB (Ultra-Wide Band), Bluetooth (registered trademark) And / or systems based on other suitable wireless communication methods and / or extended next generation systems based on these.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • any reference to an element using the designation "first”, “second” and the like as used herein does not generally limit the quantity or order of those elements. These designations may be used herein as a convenient way of distinguishing between two or more elements. Thus, reference to the first and second elements does not mean that only two elements can be taken or that the first element must somehow precede the second element.
  • determining may encompass a wide variety of operations. For example, “determination” may be calculating, computing, processing, deriving, investigating, looking up (eg, table, database or other data) A search on structure), ascertaining, etc. may be considered as “determining”. Also, “determination” may be receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (access) It may be considered as “determining” (eg, accessing data in memory) and the like. Also, “determination” is considered to be “determination” to resolve, select, choose, choose, establish, compare, etc. It is also good. That is, “determination” may be considered as “determining” some action.
  • connection refers to any direct or indirect connection between two or more elements or It means a bond and can include the presence of one or more intermediate elements between two elements “connected” or “connected” to each other.
  • the coupling or connection between elements may be physical, logical or a combination thereof. For example, “connection” may be read as "access”.
  • the radio frequency domain It can be considered as “connected” or “coupled” with one another using electromagnetic energy or the like having wavelengths in the microwave region and / or the light (both visible and invisible) regions.
  • a and B are different may mean “A and B are different from each other”.
  • the terms “leave”, “combined” and the like may be interpreted similarly.

Landscapes

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

Abstract

Selon un mode de réalisation, la présente invention concerne un terminal utilisateur qui est caractérisé en ce qu'il comprend : une unité d'émission/réception pour recevoir et/ou émettre un bloc de transport (TB); et une unité de commande qui détermine la taille du TB sur la base d'un résultat d'arrondissement, en utilisant un coefficient prédéterminé, un nombre intermédiaire quantifié de bits d'information, le coefficient prédéterminé étant dérivé sur la base d'au moins une valeur fixe, du nombre intermédiaire quantifié et du nombre de blocs de code inclus dans le TB.
PCT/JP2018/000521 2018-01-11 2018-01-11 Terminal utilisateur, et procédé de communication sans fil WO2019138511A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021029124A1 (fr) * 2019-08-15 2021-02-18 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ Dispositif de transmission, dispositif de réception, procédé de transmission, et procédé de réception
RU2809493C2 (ru) * 2019-08-15 2023-12-12 Панасоник Интеллекчуал Проперти Корпорейшн Оф Америка Устройство передачи, устройство приема, способ передачи и способ приема

Non-Patent Citations (3)

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Title
INTEL CORPRATION: "Remaining details on TBS determination and resource allocation", 3GPP TSG RAN WG1 MEETING #91 R1-1720094, 1 December 2017 (2017-12-01), XP051369775 *
LG ELECTRONICS: "Discussion on resource allocation and TBS determination", 3GPP TSG RAN WG1 MEETING 91 R1-1719929, 1 December 2017 (2017-12-01), XP051369642 *
QUALCOMM INCORPORATED: "TBS adaptation", 3GPP TSG-RAN WG1#82B R1-155703, 9 October 2015 (2015-10-09), XP051002532 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021029124A1 (fr) * 2019-08-15 2021-02-18 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ Dispositif de transmission, dispositif de réception, procédé de transmission, et procédé de réception
RU2809493C2 (ru) * 2019-08-15 2023-12-12 Панасоник Интеллекчуал Проперти Корпорейшн Оф Америка Устройство передачи, устройство приема, способ передачи и способ приема

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