WO2022219976A1 - Terminal, procédé de communication et station de base - Google Patents

Terminal, procédé de communication et station de base Download PDF

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Publication number
WO2022219976A1
WO2022219976A1 PCT/JP2022/010435 JP2022010435W WO2022219976A1 WO 2022219976 A1 WO2022219976 A1 WO 2022219976A1 JP 2022010435 W JP2022010435 W JP 2022010435W WO 2022219976 A1 WO2022219976 A1 WO 2022219976A1
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WIPO (PCT)
Prior art keywords
harq
terminal
downlink shared
pdsch
ack
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PCT/JP2022/010435
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English (en)
Japanese (ja)
Inventor
尚哉 芝池
浩樹 原田
聡 永田
チーピン ピ
ジン ワン
ラン チン
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株式会社Ｎｔｔドコモ
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Publication of WO2022219976A1 publication Critical patent/WO2022219976A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • 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
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to terminals and base stations in wireless communication systems.
  • NR New Radio
  • 5G various radio technologies and network architectures are being studied in order to meet the requirements of realizing a throughput of 10 Gbps or more and reducing the delay in the radio section to 1 ms or less.
  • the 3GPP Release 15 and Release 16 New Radio (NR) specifications assume that a frequency band with an upper limit of 52.6 GHz will be used for wireless communication. As shown in FIG. 3, as the frequency band used for wireless communication, the frequency band from 410 MHz to 7.125 GHz (Frequency Range 1 (FR1)) and the frequency from 24.25 GHz to 52.6 GHz A band (Frequency Range (FR2)) is defined.
  • FR1 Frequency Range 1
  • FR2 Frequency Range 2
  • 3GPP is considering using a frequency band of 52.6 GHz to 71 GHz for wireless communication as a frequency band other than FR1 and FR2 (Non-Patent Document 1, Non-Patent Document 2).
  • 5G evolution and 6G may support frequency bands above 71 GHz.
  • the generation procedure of the type 1 HARQ-ACK codebook is unclear, and the application of the HARQ-ACK band link is also unclear.
  • a receiving unit that receives a single scheduling information for a plurality of downlink shared channels, and a plurality of reservations for downlink shared channel reception are made for one candidate for a downlink shared channel reception opportunity.
  • a control unit that generates feedback information for reception reservations of the plurality of downlink shared channels, and a transmission unit that transmits the feedback information.
  • HARQ extension technology is provided when multiple PDSCHs are scheduled by one DCI.
  • FIG. 1 is a diagram for explaining a radio communication system according to an embodiment of the present invention
  • FIG. 1 is a diagram for explaining a radio communication system according to an embodiment of the present invention
  • FIG. FIG. 2 is a diagram showing an example of frequency bands used for wireless communication
  • FIG. 4 is a diagram showing an example of subcarrier spacing
  • FIG. 4 is a diagram showing an example of feeding back multiple HARQ-ACKs for all multiple PDSCHs scheduled by a single DCI in one PUCCH
  • FIG. 4 is a diagram showing an example of type 1 HARQ-ACK feedback for joint feedback
  • FIG. 2 is a diagram illustrating an example of a method for generating a Type 1 HARQ-ACK codebook
  • FIG. 10 is a diagram illustrating an example of a method for determining positions of PDSCH reception opportunity candidates (or transmission opportunity candidates) in slot n+2;
  • FIG. 10 is a diagram showing an example of Step 2-1a of Proposal 1;
  • FIG. 10 is a diagram showing an example of Step 2-1b of Proposal 1;
  • FIG. 10 is a diagram showing an example of Step 2-1b of Proposal 1;
  • FIG. 10 is a diagram showing an example of Step 2-1 of Proposal 1;
  • FIG. 4 is a diagram showing an example of determining the number of reserved PDSCH receptions for PDSCH reception opportunity candidates (or transmission opportunity candidates);
  • FIG. 10 illustrates an example of determining HARQ-ACK bits for candidate PDSCH reception opportunities (or candidate transmission opportunities);
  • FIG. 10 is a diagram showing an example in which the size of the HARQ-ACK window is expanded; It is a figure showing an example of functional composition of base station 10 in an embodiment of the invention.
  • 2 is a diagram showing an example of the functional configuration of terminal 20 according to the embodiment of the present invention;
  • FIG. 2 is a diagram showing an example of hardware configuration of base station 10 or terminal 20 according to an embodiment of the present invention;
  • existing technology may be used as appropriate.
  • the existing technology is, for example, existing NR or LTE, but is not limited to existing NR or LTE.
  • FIG. 1 is a diagram for explaining a radio communication system according to an embodiment of the present invention.
  • a wireless communication system according to an embodiment of the present invention includes a base station 10 and terminals 20, as shown in FIG. Although one base station 10 and one terminal 20 are shown in FIG. 1, this is an example and there may be more than one.
  • the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
  • a physical resource of a radio signal is defined in the time domain and the frequency domain.
  • the time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or resource blocks.
  • a TTI (Transmission Time Interval) in the time domain may be a slot, or a TTI may be a subframe.
  • the base station 10 can perform carrier aggregation in which multiple cells (multiple CCs (component carriers)) are bundled and communicated with the terminal 20 .
  • multiple CCs component carriers
  • carrier aggregation one PCell (primary cell) and one or more SCells (secondary cells) are used.
  • the base station 10 transmits a synchronization signal, system information, etc. to the terminal 20.
  • Synchronization signals are, for example, NR-PSS and NR-SSS.
  • System information is transmitted, for example, on NR-PBCH or PDSCH, and is also called broadcast information.
  • the base station 10 transmits control signals or data to the terminal 20 on DL (Downlink) and receives control signals or data from the terminal 20 on UL (Uplink).
  • control channels such as PUCCH and PDCCH
  • data what is transmitted on a shared channel such as PUSCH and PDSCH is called data.
  • the terminal 20 is a communication device with a wireless communication function, such as a smartphone, mobile phone, tablet, wearable terminal, or M2M (Machine-to-Machine) communication module. As shown in FIG. 1 , the terminal 20 receives control signals or data from the base station 10 on the DL and transmits control signals or data to the base station 10 on the UL, thereby performing various functions provided by the wireless communication system. Use communication services. Note that the terminal 20 may be called UE, and the base station 10 may be called gNB.
  • the terminal 20 can perform carrier aggregation in which multiple cells (multiple CCs (component carriers)) are bundled and communicated with the base station 10 .
  • multiple CCs component carriers
  • carrier aggregation one PCell (primary cell) and one or more SCells (secondary cells) are used.
  • a PUCCH-SCell with PUCCH may also be used.
  • FIG. 2 shows a configuration example of a wireless communication system when DC (Dual connectivity) is performed.
  • a base station 10A serving as MN (Master Node) and a base station 10B serving as SN (Secondary Node) are provided.
  • the base station 10A and base station 10B are each connected to a core network.
  • Terminal 20 can communicate with both base station 10A and base station 10B.
  • MCG Master Cell Group
  • SCG Secondary Cell Group
  • MCG is composed of one PCell and one or more SCells
  • PSCell Primary SCell
  • the processing operations in the present embodiment may be executed with the system configuration shown in FIG. 1, may be executed with the system configuration shown in FIG. 2, or may be executed with a system configuration other than these.
  • the 3GPP Release 15 and Release 16 New Radio (NR) specifications assume that a frequency band with an upper limit of 52.6 GHz will be used for wireless communication. As shown in FIG. 3, as the frequency band used for wireless communication, the frequency band from 410 MHz to 7.125 GHz (Frequency Range 1 (FR1)) and the frequency from 24.25 GHz to 52.6 GHz A band (Frequency Range (FR2)) is defined.
  • FR1 Frequency Range 1
  • FR2 Frequency Range 2
  • 5G evolution and 6G may support frequency bands above 71 GHz.
  • the frequency band of 52.6 GHz to 71 GHz is a very high frequency band used for wireless communication, phase noise, high propagation loss, Peak-to- Problems such as an increase in Average Power Ratio (PAPR) and nonlinearity of the power amplifier may occur.
  • PAPR Average Power Ratio
  • phase noise is phase fluctuation generated by frequency components other than the carrier frequency in the local oscillation signal.
  • PAPR is an index representing the peak magnitude of a transmission waveform, and is the ratio of maximum power to average power. A high PAPR requires a large back-off of the power amplifier on the transmit side to avoid signal distortion.
  • Cyclic Prefix (CP)-OFDM with a large subcarrier interval or Discrete Fourier Transform-spread-Orthogonal Frequency Multiplexing (DFT- S-OFDM) may be used.
  • the 3GPP specification defines that one slot consists of 14 symbols. Therefore, as shown in FIG. 4, the larger the subcarrier spacing (SCS), the shorter the symbol length/CP length and the shorter the slot length.
  • SCS subcarrier spacing
  • a subcarrier spacing between 120 kHz and 960 kHz may be supported as the subcarrier spacing used for wireless communication in the 52.6 GHz or higher frequency band. It is envisioned to use, for example, 120 kHz subcarrier spacing, 480 kHz subcarrier spacing, and 960 kHz subcarrier spacing for communication of data. For example, a subcarrier spacing of 240 kHz may be used for transmission of the synchronization signal block (SSB) used for initial access.
  • SSB synchronization signal block
  • Time-domain resource allocation (TDRA) in the scheduling of each PUSCH out of multiple PUSCHs is a plurality of Start Symbols and Allocation length indicator values set in horizontal columns of one TDRA (SLIV).
  • SLIV Start Symbols and Allocation length indicator values set in horizontal columns of one TDRA
  • Alt1, Alt2, and Alt3 are being considered for the TDRA used in the method of scheduling multiple Physical Downlink Shared Channels (PDSCH)/multiple Physical Uplink Shared Channels (PUSCH) using a single DCI.
  • Alt1 Extend the TDRA table so that each row in the horizontal direction allows scheduling for X PUSCHs (consecutive in the time domain).
  • Each PUSCH has a separate SLIV and a separate mapping type.
  • the number of PUSCHs scheduled is signaled by the number of valid SLIVs in the horizontal row of the TDRA table signaled in the DCI.
  • Alt2 Extend the TDRA table so that each row in the horizontal direction can schedule up to X PUSCHs (which may be discontinuous in the time domain).
  • Each PUSCH has a separate SLIV and a separate mapping type. The number of PUSCHs scheduled is signaled by the number of valid SLIVs in the horizontal row of the TDRA table signaled in the DCI.
  • Alt3 Extend the TDRA table so that each row in the horizontal direction can schedule up to 8 PUSCH groups (which do not have to be consecutive in the time domain).
  • Each PUSCH group has a separate SLIV, a separate mapping type, and a separate number of slots/number of PUSCHs (N).
  • N PUSCHs occupy the same OFDM symbols signaled in SLIV and mapping type.
  • the number of PUSCHs scheduled is the sum of the number of PUSCHs in all PUSCH groups in the horizontal row of the TDRA table signaled in the DCI.
  • the 3GPP meeting is also considering reporting HARQ-ACK feedback for multiple PDSCHs using the same PUCCH within a slot.
  • FIG. 5 is a diagram showing an example in which multiple HARQ-ACKs for all multiple PDSCHs scheduled by a single DCI are fed back in one PUCCH.
  • terminal 20 sends HARQ-ACK feedback for PDSCH#0, PDSCH#1, PDSCH#2, and PDSCH#3 scheduled by a single DCI to PDSCH#0, PDSCH#1. , PDSCH#2, and PDSCH#3, it may be transmitted at the resource position of PDSCH#3 received last in the time direction and at the resource position of PUCCH determined by the value of K1.
  • FIG. 3 shows a slot offset between the last PDSCH in the time direction and a slot for transmitting HARQ-ACK information corresponding to a plurality of PDSCHs to be scheduled.
  • the granularity of K1 will be considered separately. Whether or not to transmit multiple HARQ-ACKs corresponding to multiple PDSCHs scheduled in DCI of a terminal on separate PUCCHs may be considered in the future.
  • a method of HARQ-ACK feedback for multiple scheduled PDSCHs in the 52 GHz or higher frequency band is under study.
  • Three methods are being considered as the HARQ-ACK feedback method.
  • One of them is joint HARQ-ACK feedback (a method of collectively notifying multiple HARQ-ACKs for multiple PDSCHs).
  • the second is a method of individually performing HARQ-ACK feedback.
  • the third is partial joint HARQ-ACK feedback (a method of partially collectively notifying multiple HARQ-ACKs for multiple PDSCHs).
  • the generation procedure of the type 1 HARQ-ACK codebook is unclear, and the application of the HARQ-ACK band link is also unclear. Therefore, there is a need to clarify how to map multiple HARQ-ACK bits to one candidate PUCCH transmission opportunity.
  • Terminal 20 may feed back multiple HARQ-ACKs for all multiple PDSCHs scheduled by a single DCI in one PUCCH by applying the Type 1 HARQ-ACK codebook.
  • FIG. 6 is a diagram showing an example of type 1 HARQ-ACK feedback for joint feedback.
  • terminal 20 when PDSCH #3 corresponds to HARQ-ACK transmission candidate position #k, terminal 20 responds to PDSCH #0, PDSCH #1, PDSCH #2, and PDSCH #3.
  • HARQ-ACK may be mapped to one transmission candidate position (HARQ-ACK transmission candidate position #k). In this case, the terminal 20 may or may not apply bundling.
  • the terminal 20 sends HARQ-ACK information for all of the multiple PDSCHs scheduled by a single DCI to HARQ-ACK transmission candidate positions corresponding to the PDSCH scheduled last in terms of time among the multiple scheduled PDSCHs. can be mapped.
  • Terminal 20 may not apply bundling to multiple HARQ-ACKs corresponding to multiple PDSCHs. For example, in the case of FIG. 6, terminal 20 sends HARQ-ACKs for PDSCH#0, PDSCH#1, PDSCH#2, and PDSCH#3 to transmission candidate position #k, which is the HARQ-ACK transmission candidate position for PDSCH#3. can be sent with In this case, since the terminal 20 does not apply bundling to multiple HARQ-ACKs for PDSCH #0, PDSCH #1, PDSCH #2, and PDSCH #3, the number of bits required for HARQ-ACK transmission is 4 bits.
  • the terminal 20 may apply bundling to multiple HARQ-ACKs corresponding to multiple PDSCHs.
  • Terminal 20 may bundle multiple HARQ-ACKs corresponding to multiple PDSCHs into M HARQ-ACK bits.
  • the above M may be specified in the specification. For example, it may be a fixed 1 bit.
  • the above M may be set by RRC signaling.
  • the HARQ bundle unit may be set to N1 by RRC signaling. That is, HARQ-ACKs for N1 PDSCHs to be scheduled may be aggregated into one HARQ-ACK bit. In this case, for N scheduled PDSCHs, the number of HARQ-ACK bits fed back may be ceil(N/N1).
  • the number of HARQ-ACK bits fed back for the N scheduled PDSCHs by RRC signaling may be set to M. That is, HARQ-ACKs for ceil(N/M) PDSCHs to be scheduled may be aggregated into one HARQ-ACK bit.
  • Terminal 20 may not apply bundling to multiple HARQ-ACKs corresponding to multiple PDSCHs.
  • Type 1 HARQ-ACK codebook (Generation of Type 1 HARQ-ACK codebook for Release 16)
  • the number of bits (size) included in the HARQ-ACK codebook is semi-statically determined.
  • the terminal 20 uses the HARQ-ACK window (for example, the range set based on the higher layer parameters) regardless of whether PDSCH is scheduled or not.
  • HARQ-ACK bits corresponding to reception candidate positions of all PDSCHs that are received are fed back.
  • FIG. 7 is a diagram explaining an example of a method for generating a Type 1 HARQ-ACK codebook.
  • the size of the HARQ-ACK codebook is the size of the HARQ-ACK window (the window indicated by the dotted line in the example of FIG. 7) determined by the value of K1 (a plurality of values of K1) and Determined by the number of PDSCH reception candidate positions included in the ACK window.
  • the value of K1 for the PDSCH reception candidate position of slot n+2 is 7
  • the value of K1 for the PDSCH reception candidate position of slot n+3 is 6, and the K1 value of the PDSCH reception candidate position of slot n+4 is 6.
  • the HARQ-ACK for the PDSCH reception candidate position of slot n+2, the PDSCH reception candidate position of slot n+3, and the PDSCH reception candidate position of slot n+4 are collectively transmitted in slot n+9. That is, in the case of the Type 1 HARQ-ACK codebook, the K1 value set is set in the upper layer, and the HARQ-ACK window is set within a range that can cover the K1 value set.
  • FIG. 8 is a diagram showing an example of a method for determining positions of PDSCH reception opportunity candidates (or transmission opportunity candidates) in slot n+2.
  • the last two symbols in the time direction in slot n+2 are semi-statically set to UL.
  • Row Index (RI) 2, RI3, and RI8 in FIG. are excluded from the generation of HARQ-ACK bits.
  • step 1 For the Release 16 type 1 HARQ-ACK feedback method, there is a step of defining a HARQ-ACK window based on the K1 set (step 1), for each slot in the HARQ-ACK window, candidate PDSCH reception opportunities ( or candidate transmission opportunity) M_(A,c) (step 2), and generating a plurality of HARQ-ACK bits for the determined candidate PDSCH reception opportunity (or candidate transmission opportunity) (step 3). ) is included.
  • the number of reserved PDSCH receptions may be determined by a TDRA table configuration.
  • the number of PDSCH receptions reserved may be determined by the maximum number of PDSCHs that can be scheduled using a single DCI.
  • Steps 2 and 3 in the Release 16 type 1 HARQ-ACK feedback method are replaced by the following extended steps 2 and 3.
  • the terminal 20 determines PDSCH reception opportunity candidates (or transmission opportunity candidates) M_(A, c) in steps 2-1 and 2-3 below.
  • Step 2-1 Among the time domain resource allocation according to the horizontal row of each TDRA in the TDRA table setting, it is determined whether the time domain resource collides with the UL resource.
  • Step 2-1a For each TDRA horizontal column in the TDRA table set, determine a TDRA candidate set.
  • C(TDRAi) represents a set of unique TDRAs.
  • i is the TDRA's index in the set.
  • Ti(TDRA) represents the set of TDRA columns corresponding to the i-th TDRA candidate.
  • "unique TDRA” means that if a TDRA is already included in the set of TDRA candidates, the TDRA is not re-added to the set of TDRA candidates.
  • Step 2-1b If a TDRA candidate collides with UL resources, remove the TDRA candidate from the set of TDRA candidates.
  • the TDRA candidate may be excluded from the set of TDRA candidates.
  • TDRA column corresponding to a TDRA candidate (a TDRA column in the set of TDRA columns)
  • TDRA column if that TDRA column collides (overlaps in the time domain) with a semi-static symbol, the TDRA column It may be excluded from the set of TDRA columns corresponding to the candidate. If the TDRA set corresponding to a TDRA candidate becomes empty after performing the exclusion, the TDRA candidate may be excluded from the set of TDRA candidates.
  • Alt1, Alt2, and Alt3 are conceivable as conditions for TDRA columns to collide with semi-static symbols (overlapping in the time domain).
  • a specific SLIV in the TDRA column collides with a semi-static UL symbol.
  • the specific SLV may be an SLV having a set index or a specific index.
  • Step 2-1b may or may not be executed. Whether or not to perform step 2-1b may be determined by the specification or may be set by RRC signaling.
  • Step 2-2 The set of TDRA candidates determined in step 2-1 is pruned to obtain PDSCH reception opportunity candidates (or transmission opportunity candidates).
  • the pruning scheme may be similar to the release 16 pruning scheme.
  • FIG. 9 is a diagram showing an example of Step 2-1a of Proposal1.
  • FIG. 9 shows an example of determining PDSCH reception opportunity candidates (or transmission opportunity candidates) in slot n.
  • two TDRA candidates (TDRA candidate #1 and TDRA candidate #2) are obtained for row #0/1/2 by executing step 2-1a.
  • TDRA candidate #1 corresponds to TDRA row set ⁇ row#0, row#1 ⁇ .
  • TDRA candidate #2 corresponds to TDRA row set ⁇ row #2 ⁇ .
  • FIG. 10 is a diagram showing an example of Step 2-1b of Proposal1. Since the TDRA candidates do not collide with semi-static UL symbols (they do not overlap in the time domain), no TDRA candidate exclusion is performed.
  • FIG. 11 is a diagram showing an example of Step 2-1b of Proposal1.
  • TDRA candidate #2 is excluded from the set of TDRA candidates because it collides with the semi-static UL symbol (overlapping in the time domain).
  • FIG. 12 is a diagram showing an example of Step 2-1 of Proposal1.
  • FIG. 12 shows an example of determining PDSCH reception opportunity candidates (or transmission opportunity candidates) in slot n.
  • TDRA candidate #1 it is determined whether or not TDRA row set ⁇ row#0, row#1 ⁇ conflicts with UL resources.
  • (extended step 3) Generate HARQ-ACK bits for the determined PDSCH reception opportunity candidates (or transmission opportunity candidates). Determine the number of reserved PDSCH receptions for a candidate PDSCH reception opportunity (or candidate transmission opportunity).
  • Lk be the number of reserved PDSCH receptions for a candidate PDSCH reception opportunity (or a candidate transmission opportunity) i .
  • L k is determined as the maximum number of TDRAs for all TDRA rows in the TDRA row set of all TDRA candidates corresponding to PDSCH receiving device candidate k.
  • the TDRA row set of TDRA candidates means the TDRA row set obtained by executing step 2-1.
  • the HARQ-ACK bits for the candidate PDSCH reception opportunities (or candidate transmission opportunities) are then determined.
  • TDRA candidate corresponding to PDSCH reception opportunity candidate (or transmission opportunity candidate) k and the TDRA candidate corresponds to the last PDSCH in the time direction scheduled by the DCI
  • the HARQ-ACK information of one or more PDSCHs scheduled by the DCI is the PDSCH It maps to the L k reserved PDSCH receptions for k candidate reception opportunities (or candidate transmission opportunities).
  • the HARQ-ACK information is sent to the first L k reserved PDSCH receptions in the time direction. It is mapped to the m PDSCH receptions or the last m PDSCH receptions in the time direction. If the number of PDSCHs actually scheduled (eg, m) is greater than L k , NACKs are generated for L k reserved PDSCH receptions.
  • FIG. 13 is a diagram illustrating an example of determining the number L k of reserved PDSCH receptions for PDSCH reception opportunity candidates (or transmission opportunity candidates) k.
  • FIG. 14 is a diagram illustrating an example of determining HARQ-ACK bits for PDSCH reception opportunity candidates (or transmission opportunity candidates).
  • the number L k of reserved PDSCH receptions is eight for PDSCH reception opportunity candidates (or transmission opportunity candidates) #k.
  • four PDSCHs are received for candidate PDSCH reception opportunity (or candidate transmission opportunity) #k.
  • NACKs are generated for the remaining 4 reserved PDSCH receptions out of the 8 reserved PDSCH receptions.
  • Proposal 2 for a PDSCH reception opportunity, the number of PDSCH receptions reserved is determined by the maximum number of PDSCHs that can be scheduled using a single DCI. Steps 2 and 3 in the Release 16 type 1 HARQ-ACK feedback method are replaced by the following extended steps 2 and 3.
  • Extended step 2 may be similar to extended step 2 of Proposal1.
  • An extended step 3 generates HARQ-ACK bits for the determined PDSCH reception opportunity candidates (or transmission opportunity candidates).
  • the number of reserved PDSCH receptions for a candidate PDSCH reception opportunity (or a candidate transmission opportunity) is determined.
  • the number of reserved PDSCH receptions for each candidate PDSCH reception opportunity is M, which may be the maximum number of PDSCHs that can be scheduled by DCI.
  • HARQ-ACK bits for the PDSCH reception opportunity candidates (or transmission opportunity candidates). For M reserved PDSCH receptions of PDSCH reception opportunity candidates (or transmission opportunity candidates) k, to the TDRA candidates corresponding to PDSCH reception opportunity candidates (or transmission opportunity candidates) k If there is a DCI that schedules a PDSCH, and the TDRA candidate corresponds to the last PDSCH in the time direction scheduled by the DCI, the HARQ-ACK information of one or more PDSCHs scheduled by the DCI is received by the PDSCH.
  • Candidate opportunities (or candidate transmission opportunities) are mapped to the M reserved PDSCH receptions of k.
  • the HARQ-ACK information is sent to the first m of the M reserved PDSCH receptions in the time direction. or the last m PDSCH receptions in the time direction. If the number of PDSCHs actually scheduled (eg, m) is greater than M, a NACK is generated for the M reserved PDSCH receptions.
  • Which of the above proposals/options to apply may be set by upper layer parameters, may be reported by the terminal 20 as terminal capability information (UE Capability), or may be described in the specifications. It may be set by higher layer parameters and reported as terminal capability information.
  • UE Capability terminal capability information
  • Information indicating whether or not the terminal 20 supports scheduling of multiple PDSCHs based on a single DCI may be defined as terminal capability (UE Capability).
  • UE Capability terminal capability
  • the terminal 20 supports joint HARQ-ACK feedback for multiple PDSCHs scheduled with a single DCI (a function to collectively notify multiple HARQ-ACKs for multiple PDSCHs).
  • Information indicating whether to do so may be defined.
  • whether or not the terminal 20 supports type 1 HARQ-ACK codebook based on mapping of multiple PDSCHs to one PDSCH reception opportunity candidate (or transmission opportunity candidate) may be defined.
  • information indicating whether the terminal 20 supports the function of determining PDSCH reception opportunity candidates (or transmission opportunity candidates) based on the last TDRA of each TDRA row is may be defined.
  • HARQ-ACK codebook An overview of the HARQ-ACK codebook for DL transmission is given.
  • the HARQ-ACK codebook defines how to put together multiple HARQ-ACKs when they are multiplexed and transmitted.
  • HARQ-ACK codebooks are time domain (e.g. slots), frequency domain (e.g. Component Carrier (CC)), spatial domain (e.g. layers), Transport Block (TB), Also, it may be configured to include bits for HARQ-ACK in at least one unit of a group of code blocks (Code Block Group (CBG)) that configures the TB.
  • CBG Code Block Group
  • a CC is also called a cell, a serving cell, a carrier, or the like.
  • the bits are also called HARQ-ACK bits, HARQ-ACK information, HARQ-ACK information bits, or the like.
  • the HARQ-ACK codebook is also called PDSCH-HARQ-ACK-Codebook, codebook, HARQ codebook, HARQ-ACK size, and so on.
  • the number of bits (size) included in the HARQ-ACK codebook may be determined semi-statically or dynamically.
  • a semi-static HARQ-ACK codebook is also called a Type 1 HARQ-ACK codebook, a semi-static codebook, or the like.
  • a dynamic HARQ-ACK codebook is also called a Type 2 HARQ-ACK codebook, a dynamic codebook, and the like.
  • Type 1 HARQ-ACK codebook or the Type 2 HARQ-ACK codebook may be set in the terminal 20 by a higher layer parameter (eg, pdsch-HARQ-ACK-Codebook).
  • Type 1 HARQ-ACK codebook the terminal 20, within a predetermined range (for example, a range set based on higher layer parameters), regardless of the presence or absence of PDSCH scheduling, HARQ-ACK corresponding to the predetermined range. Bits may be fed back.
  • a predetermined range for example, a range set based on higher layer parameters
  • the predetermined range may be configured or activated in terminal 20 for a predetermined period of time (e.g., a set of a predetermined number of possible occurrences for PDSCH reception or a predetermined number of PDCCH monitoring occasions m). number of CCs, number of TBs (number of layers or rank), number of CBGs per TB, and whether or not spatial bundling is applied.
  • the predetermined range is also called HARQ-ACK bundling window, HARQ-ACK feedback window, bundling window, feedback window, and the like.
  • the terminal 20 feeds back NACK bits within a predetermined range even if there is no PDSCH scheduling for the terminal 20 . Therefore, when using the Type 1 HARQ-ACK codebook, it is expected that the number of HARQ-ACK bits to be fed back will increase.
  • the terminal 20 may feed back the HARQ-ACK bits for the scheduled PDSCH within the predetermined range.
  • the terminal 20 determines the number of bits of the Type 2 HARQ-ACK codebook based on a predetermined field in DCI (for example, a DL assignment index (Downlink Assignment Indicator (Index) (DAI)) field).
  • DCI Downlink Assignment Indicator
  • cDAI counter DAI
  • tDAI total DAI
  • the counter DAI may indicate the counter value of downlink transmissions (PDSCH, data, TB) scheduled within a predetermined period.
  • a counter DAI in a DCI that schedules data within that predetermined period of time may indicate the number counted first in the frequency domain (eg, CC) and then in the time domain within that predetermined period of time.
  • the total DAI may indicate the total value (total number) of data scheduled within a predetermined period.
  • the total DAI in the DCI that schedules data in a predetermined time unit (eg, PDCCH monitoring occasion) within the predetermined period is the predetermined time unit (also referred to as a point, timing, etc.) within the predetermined period. It may indicate the total number of scheduled data.
  • the terminal 20 transmits one or more HARQ-ACK bits determined (generated) based on the above Type 1 or Type 2 HARQ-ACK codebook to an uplink control channel (Physical Uplink Control Channel (PUCCH)) and uplink sharing It may be transmitted using at least one of the channels (Physical Uplink Shared Channel (PUSCH)).
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • the terminal 20 does not actually transmit PDCCH/PDSCH from the base station 10, but according to the number of PDCCH/PDSCH transmission candidates that may be transmitted from the base station 10. generates an equal number of HARQ-ACK bits. That is, regardless of whether the PDCCH/PDSCH is actually transmitted from the base station 10 or not, the terminal 20 is , send HARQ-ACK bits. For example, when PDCCH transmission from the base station 10 is not performed in response to a PDCCH transmission opportunity from the base station 10, the terminal 20 may transmit NACK.
  • the terminal 20 In the case of the Type 2 HARQ-ACK codebook, the terminal 20 generates the number of HARQ-ACK bits corresponding to the number of PDCCH/PDSCH signals expected to be actually transmitted from the base station 10 . Since the terminal 20 may not be able to receive the PDCCH signal from the base station 10, the base station 10 may notify the terminal 20 of the number of PDCCH signals to be transmitted by including the DAI in the DCI. is possible.
  • Type 1 HARQ-ACK codebook (Generation of Type 1 HARQ-ACK codebook for Release 16)
  • the number of bits (size) included in the HARQ-ACK codebook is semi-statically determined.
  • the terminal 20 uses the HARQ-ACK window (for example, the range set based on the higher layer parameters) regardless of whether PDSCH is scheduled or not.
  • HARQ-ACK bits corresponding to reception candidate positions of all PDSCHs that are received are fed back.
  • the size of the HARQ-ACK window may be expanded.
  • the K1 set may be extended to include ⁇ K1 ⁇ , ⁇ K1+1 ⁇ , ⁇ K1+2 ⁇ , ..., ⁇ K1+Nmax ⁇ , for example.
  • Nmax is the maximum number of scheduled slots for multiple PDSCH scheduling. Nmax may be defined in the specification or may be set in RRC signaling.
  • FIG. 15 is a diagram showing an example of expanding the size of the HARQ-ACK window.
  • HARQ-ACKs for scheduled PDSCHs are fed back in slot n+10 (last PDSCH slot+K1)
  • the HARQ-ACK window before being extended includes slot n+5 to slot n+7.
  • Nmax is set to 4.
  • the K1 set is extended to include ⁇ 3,4,5 ⁇ , ⁇ 4,5,6 ⁇ , ⁇ 5,6,7 ⁇ , ⁇ 6,7,8 ⁇ . That is, the K1 set is expanded to ⁇ 3,4,5,6,7,8 ⁇ . Therefore, the HARQ-ACK window is extended to include slot n+1 to slot n+7.
  • the base station 10 and the terminal 20 include functions for executing each operation example described above. However, each of the base station 10 and the terminal 20 may have only one function of each operation example.
  • FIG. 16 is a diagram showing an example of the functional configuration of the base station 10.
  • the base station 10 has a transmitting section 110, a receiving section 120, a setting section 130, and a control section 140.
  • the functional configuration shown in FIG. 16 is merely an example. As long as the operation according to the embodiment of the present invention can be executed, the functional division and the names of the functional units may be arbitrary.
  • the transmitting unit 110 and the receiving unit 120 may be called a communication unit.
  • the transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and wirelessly transmitting the signal.
  • the receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, higher layer information from the received signals.
  • the transmitting unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, DL data, etc. to the terminal 20 . Also, the transmission unit 110 transmits setting information and the like.
  • the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in the storage device, and reads them from the storage device as necessary.
  • the control unit 140 performs, for example, resource allocation, overall control of the base station 10, and the like. It should be noted that the functional unit related to signal transmission in control unit 140 may be included in transmitting unit 110 , and the functional unit related to signal reception in control unit 140 may be included in receiving unit 120 . Also, the transmitting unit 110 and the receiving unit 120 may be called a transmitter and a receiver, respectively.
  • FIG. 17 is a diagram showing an example of the functional configuration of the terminal 20.
  • the terminal 20 has a transmitting section 210, a receiving section 220, a setting section 230, and a control section 240.
  • the functional configuration shown in FIG. 17 is merely an example. As long as the operation according to the embodiment of the present invention can be executed, the functional division and the names of the functional units may be arbitrary.
  • the transmitting unit 210 and the receiving unit 220 may be called a communication unit.
  • the transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal.
  • the receiving unit 220 wirelessly receives various signals and acquires a higher layer signal from the received physical layer signal.
  • the setting unit 230 stores various types of setting information received from the base station 10 by the receiving unit 220 in the storage device, and reads them from the storage device as necessary.
  • the setting unit 230 also stores preset setting information.
  • the control unit 240 controls the terminal 20 as a whole. It should be noted that the functional unit related to signal transmission in control unit 240 may be included in transmitting unit 210 , and the functional unit related to signal reception in control unit 240 may be included in receiving unit 220 . Also, the transmitting section 210 and the receiving section 220 may be called a transmitter and a receiver, respectively.
  • the embodiment describes at least the following terminals, communication methods, and base stations.
  • a receiver that receives a single scheduling information for a plurality of downlink shared channels; a control unit that performs a plurality of downlink shared channel reception reservations for one downlink shared channel reception opportunity candidate, and generates feedback information for the plurality of downlink shared channel reception reservations; a transmitter that transmits the feedback information; terminal with
  • the control unit When the receiving unit actually receives one or a plurality of downlink shared channels for some of the reservations for reception of the plurality of downlink shared channels, the control unit provides feedback information for the part. , feedback information of one or more downlink shared channels actually received by the receiving unit may be generated.
  • the control unit may generate a negative acknowledgment as feedback information for remaining reservations for which the receiving unit does not actually receive the downlink shared channel among the plurality of reservations for reception of the downlink shared channel.
  • a transmitter that transmits a single scheduling information for a plurality of downlink shared channels; a receiving unit that receives feedback information on reception of a plurality of downlink shared channels reserved for one candidate for transmission opportunity of a downlink shared channel; base station.
  • HARQ extension technology is provided when multiple PDSCHs are scheduled by one DCI.
  • each functional block may be implemented using one device that is physically or logically coupled, or directly or indirectly using two or more devices that are physically or logically separated (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices.
  • a functional block may be implemented by combining software in the one device or the plurality of devices.
  • Functions include judging, determining, determining, calculating, calculating, processing, deriving, investigating, searching, checking, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, assuming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. can't
  • a functional block (component) responsible for transmission is called a transmitting unit or transmitter.
  • the implementation method is not particularly limited.
  • the base station 10, the terminal 20, etc. may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 18 is a diagram illustrating an example of hardware configurations of the base station 10 and the terminal 20 according to an embodiment of the present disclosure.
  • the base station 10 and terminal 20 described above are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. good too.
  • the term "apparatus” can be read as a circuit, device, unit, or the like.
  • the hardware configuration of the base station 10 and terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without some devices.
  • Each function of the base station 10 and the terminal 20 is performed by the processor 1001 performing calculations and controlling communication by the communication device 1004 by loading predetermined software (programs) onto hardware such as the processor 1001 and the storage device 1002. or by controlling at least one of data reading and writing in the storage device 1002 and the auxiliary storage device 1003 .
  • the processor 1001 for example, operates an operating system and controls the entire computer.
  • the processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like.
  • CPU central processing unit
  • the control unit 140 , the control unit 240 and the like described above may be implemented by the processor 1001 .
  • the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to them.
  • programs program codes
  • software modules software modules
  • data etc.
  • the program a program that causes a computer to execute at least part of the operations described in the above embodiments is used.
  • control unit 140 of base station 10 shown in FIG. 16 may be implemented by a control program stored in storage device 1002 and operated by processor 1001 .
  • FIG. Processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from a network via an electric communication line.
  • the storage device 1002 is a computer-readable recording medium, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. may be configured.
  • the storage device 1002 may also be called a register, cache, main memory (main storage device), or the like.
  • the storage device 1002 can store executable programs (program code), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.
  • the auxiliary storage device 1003 is a computer-readable recording medium, for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, a Blu -ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, and/or the like.
  • Auxiliary storage device 1003 may also be referred to as an auxiliary storage device.
  • the storage medium described above may be, for example, a database, server, or other suitable medium including at least one of storage device 1002 and secondary storage device 1003 .
  • the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of, for example, frequency division duplex (FDD) and time division duplex (TDD).
  • FDD frequency division duplex
  • TDD time division duplex
  • the transceiver may be physically or logically separate implementations for the transmitter and receiver.
  • the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside.
  • the output device 1006 is an output device (for example, display, speaker, LED lamp, etc.) that outputs to the outside. Note that 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 storage device 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.
  • the base station 10 and the terminal 20 include microprocessors, digital signal processors (DSPs), ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), FPGAs (Field Programmable Gates and other hardware arrays). , and part or all of each functional block may be implemented by the hardware.
  • processor 1001 may be implemented using at least one of these pieces of hardware.
  • the operations of a plurality of functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by a plurality of components.
  • the processing order may be changed as long as there is no contradiction.
  • the base station 10 and the terminal 20 have been described using functional block diagrams for convenience of explanation of processing, such devices may be implemented in hardware, software, or a combination thereof.
  • the software operated by the processor of the base station 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are stored in random access memory (RAM), flash memory, read-only memory, respectively. (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other appropriate storage medium.
  • notification of information is not limited to the aspects/embodiments described in the present disclosure, and may be performed using other methods.
  • notification of information includes physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof.
  • RRC signaling may be called an RRC message, for example, RRC It may be a connection setup (RRC Connection Setup) message, an RRC connection reconfiguration message, or the like.
  • Each aspect/embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark) )), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other suitable systems and extended It may be applied to at least one of the next generation systems. Also, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G, etc.).
  • a specific operation performed by the base station 10 in this specification may be performed by its upper node in some cases.
  • various operations performed for communication with the terminal 20 may be performed by the base station 10 and other network nodes other than the base station 10 (eg, but not limited to MME or S-GW).
  • the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW).
  • Information, signals, etc. described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may be input and output via multiple network nodes.
  • Input/output information may be stored in a specific location (for example, memory) or managed using a management table. Input/output information and the like can be overwritten, updated, or appended. The output information and the like may be deleted. The entered information and the like may be transmitted to another device.
  • the determination in the present disclosure may be performed by a value represented by 1 bit (0 or 1), may be performed by a boolean (Boolean: true or false), or may be a numerical comparison (for example , comparison with a predetermined value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • a transmission medium For example, if the software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.), the website, Wired and/or wireless technologies are included within the definition of transmission medium when sent from a server or other remote source.
  • wired technology coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of
  • the channel and/or symbols may be signaling.
  • a signal may also be a message.
  • a component carrier may also be called a carrier frequency, cell, frequency carrier, or the like.
  • system and “network” used in this disclosure are used interchangeably.
  • information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information.
  • radio resources may be indexed.
  • the names used for the parameters described above are not restrictive names in any respect. Further, the formulas, etc., using these parameters may differ from those expressly disclosed in this disclosure. Since the various channels (e.g., PUSCH, PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, the various names assigned to these various channels and information elements are in no way restrictive. not a name.
  • base station BS
  • radio base station base station
  • base station fixed station
  • NodeB nodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • a base station can accommodate one or more (eg, three) cells.
  • the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being associated with a base station subsystem (e.g., an indoor small base station (RRH:
  • RRH indoor small base station
  • the term "cell” or “sector” refers to part or all of the coverage area of at least one of the base stations and base station subsystems serving communication services in this coverage.
  • MS mobile station
  • UE user equipment
  • terminal terminal
  • a mobile station is defined by those skilled in the art as 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, terminal , a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term.
  • At least one of the base station and mobile station may be called a transmitting device, a receiving device, a communication device, or the like.
  • At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like.
  • the mobile object may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile object (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ).
  • at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
  • at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read as a terminal.
  • a configuration in which communication between a base station and a terminal is replaced with communication between a plurality of terminals 20 for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.
  • the terminal 20 may have the functions of the base station 10 described above.
  • words such as "up” and “down” may be replaced with words corresponding to inter-terminal communication (for example, "side”).
  • uplink channels, downlink channels, etc. may be read as side channels.
  • a terminal in the present disclosure may be read as a base station.
  • the base station may have the functions that the terminal has.
  • determining and “determining” used in this disclosure may encompass a wide variety of actions.
  • “Judgement” and “determination” are, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry (eg, lookup in a table, database, or other data structure);
  • “judgment” and “determination” are used to refer to receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access (Accessing) (for example, accessing data in memory) may include deeming that a "judgment” or “decision” has been made.
  • “judgment” and “decision” refer to resolving, selecting, choosing, establishing, comparing, etc.
  • judgment and “decision" can contain.
  • judgment and “decision” may include considering that some action is “judgment” and “decision”.
  • judgment (decision) may be read as “assuming", “expecting”, “considering”, or the like.
  • connection means any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements being “connected” or “coupled.” Couplings or connections between elements may be physical, logical, or a combination thereof. For example, “connection” may be read as "access”.
  • two elements are defined using at least one of one or more wires, cables, and printed electrical connections and, as some non-limiting and non-exhaustive examples, in the radio frequency domain. , electromagnetic energy having wavelengths in the microwave and optical (both visible and invisible) regions, and the like.
  • the reference signal can also be abbreviated as RS (Reference Signal), and may also be called Pilot depending on the applicable standard.
  • RS Reference Signal
  • any reference to elements using the "first,” “second,” etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, reference to a first and second element does not imply that only two elements can be employed or that the first element must precede the second element in any way.
  • a radio frame may consist of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe. A subframe may also consist of one or more slots in the time domain. A subframe may be of a fixed length of time (eg, 1 ms) independent of numerology.
  • a numerology may be a communication parameter that applies to the transmission and/or reception of a signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, radio frame configuration, transceiver It may indicate at least one of certain filtering operations performed in the frequency domain, certain windowing operations performed by the transceiver in the time domain, and/or the like.
  • SCS subcarrier spacing
  • TTI Transmission Time Interval
  • TTI Transmission Time Interval
  • transceiver It may indicate at least one of certain filtering operations performed in the frequency domain, certain windowing operations performed by the transceiver in the time domain, and/or the like.
  • a slot may consist of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain.
  • a slot may be a unit of time based on numerology.
  • a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
  • PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (or PUSCH) mapping type A.
  • PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.
  • Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations.
  • one subframe may be called a Transmission Time Interval (TTI)
  • TTI Transmission Time Interval
  • TTI Transmission Time Interval
  • TTI Transmission Time Interval
  • one slot or one minislot may be called a TTI.
  • TTI Transmission Time Interval
  • at least one of the subframe and 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 may be Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum scheduling time unit in wireless communication.
  • the base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each terminal 20) to each terminal 20 on a TTI basis.
  • radio resources frequency bandwidth, transmission power, etc. that can be used by each terminal 20
  • TTI is not limited to this.
  • a TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum scheduling time unit. Also, 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), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like.
  • TTI that is shorter than a normal TTI may also be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, and the like.
  • the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
  • the short TTI e.g., shortened TTI, etc.
  • a TTI having the above TTI length may be read instead.
  • a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
  • the number of subcarriers included in the RB may be the same regardless of the numerology, and may be 12, for example.
  • the number of subcarriers included in an RB may be determined based on numerology.
  • the time domain of an RB may include one or more symbols and may be 1 slot, 1 minislot, 1 subframe, or 1 TTI long.
  • One TTI, one subframe, etc. may each consist of one or more resource blocks.
  • One or more RBs are physical resource blocks (PRB: Physical RB), sub-carrier groups (SCG: Sub-Carrier Group), resource element groups (REG: Resource Element Group), PRB pairs, RB pairs, etc. may be called.
  • PRB Physical resource blocks
  • SCG Sub-Carrier Group
  • REG Resource Element Group
  • PRB pairs RB pairs, etc.
  • a resource block may be composed of one or more resource elements (RE: Resource Element).
  • RE Resource Element
  • 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • a bandwidth part (which may also be called a partial bandwidth, etc.) may represent a subset of contiguous common resource blocks (RBs) for a certain numerology in a certain carrier.
  • the common RB may be identified by an RB index based on the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
  • UL BWP UL BWP
  • DL BWP DL BWP
  • One or multiple BWPs may be configured for a UE within one carrier.
  • At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
  • BWP bitmap
  • radio frames, subframes, slots, minislots and symbols described above are only examples.
  • the number of subframes contained in a radio frame the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers, the number of symbols in a TTI, the symbol length, the Cyclic Prefix (CP) length, etc.
  • CP Cyclic Prefix
  • a and B are different may mean “A and B are different from each other.”
  • the term may also mean that "A and B are different from C”.
  • Terms such as “separate,” “coupled,” etc. may also be interpreted in the same manner as “different.”
  • notification of predetermined information is not limited to being performed explicitly, but may be performed implicitly (for example, not notifying the predetermined information). good too.
  • the SS block or CSI-RS is an example of a synchronization signal or reference signal.
  • base station 110 transmitting unit 120 receiving unit 130 setting unit 140 control unit 20 terminal 210 transmitting unit 220 receiving unit 230 setting unit 240 control unit 1001 processor 1002 storage device 1003 auxiliary storage device 1004 communication device 1005 input device 1006 output device

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  • Mobile Radio Communication Systems (AREA)

Abstract

Ce terminal comprend : une unité de réception qui reçoit des informations de planification unique pour de multiples canaux partagés descendants; une unité de commande qui, pour une occasion de réception candidate d'un canal partagé descendant, effectue de multiples réservations de réception pour le canal partagé descendant et génère des informations de rétroaction pour la réservation de réception des multiples canaux partagés descendants; et une unité de transmission qui transmet les informations de rétroaction.
PCT/JP2022/010435 2021-04-15 2022-03-09 Terminal, procédé de communication et station de base WO2022219976A1 (fr)

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JP2021-069388 2021-04-15

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020017055A1 (fr) * 2018-07-20 2020-01-23 株式会社Ｎｔｔドコモ Équipement utilisateur et procédé de communication sans fil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020017055A1 (fr) * 2018-07-20 2020-01-23 株式会社Ｎｔｔドコモ Équipement utilisateur et procédé de communication sans fil

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
SAMSUNG: "PDSCH/PUSCH enhancements for NR from 52.6 GHz to 71 GHz", 3GPP DRAFT; R1-2101198, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20210125 - 20210205, 19 January 2021 (2021-01-19), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051971412 *
SONY: "Enhancements on HARQ for NTN", 3GPP DRAFT; R1-2100861, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. E-meeting; 20210125 - 20210205, 19 January 2021 (2021-01-19), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051971213 *

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