WO2020066021A1 - ユーザ端末 - Google Patents
ユーザ端末 Download PDFInfo
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- WO2020066021A1 WO2020066021A1 PCT/JP2018/036590 JP2018036590W WO2020066021A1 WO 2020066021 A1 WO2020066021 A1 WO 2020066021A1 JP 2018036590 W JP2018036590 W JP 2018036590W WO 2020066021 A1 WO2020066021 A1 WO 2020066021A1
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- information
- repetition
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0025—Transmission of mode-switching indication
Definitions
- the present disclosure relates to a user terminal in a next-generation mobile communication system.
- LTE Long Term Evolution
- 3GPP@Rel.10-14 LTE-Advanced
- LTE Long Term Evolution
- 5G + fifth generation mobile communication system
- NR New Radio
- 3GPP Rel. 15 or later A successor system to LTE (for example, 5G (5th generation mobile communication system), 5G + (plus), NR (New Radio), 3GPP Rel. 15 or later) is also being studied.
- a user terminal In an existing LTE system (for example, 3GPP@Rel.8-14), a user terminal (UE: User @ Equipment) is a downlink shared channel (for example, PDSCH :) which is scheduled by downlink control information (for example, DCI: Downlink @ Control @ Information). Physical Downlink Shared Channel) is received. Further, the UE uses at least one of a UL data channel (for example, PUSCH: Physical Uplink Shared Channel) and a UL control channel (for example, PUCCH: Physical Uplink Control Channel) to transmit uplink control information (UCI: Uplink Control Information).
- a UL data channel for example, PUSCH: Physical Uplink Shared Channel
- a UL control channel for example, PUCCH: Physical Uplink Control Channel
- E-UTRA Evolved Universal Terrestrial Radio Access
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- a future wireless communication system for example, NR, 5G, 5G +, or Rel. 15 or later
- BF beamforming
- the user terminal performs the reception processing of the channel / signal based on the information (QCL information) about the pseudo collocation (QCL: Quasi-Co-Location) of at least one of the predetermined channel and signal (channel / signal).
- Controlling eg, at least one of demapping, demodulation, and decoding
- the QCL information of a predetermined channel / signal (for example, PDSCH, PDCCH, etc.) is also called a transmission configuration instruction (TCI: Transmission Configuration Indication or Transmission Configuration Indicator) state (TCI state) of the predetermined channel / signal.
- TCI Transmission Configuration Indication or Transmission Configuration Indicator
- repetition transmission in UL transmission and DL transmission is also being considered. Also, it has been studied to repeatedly transmit using a different transmission / reception point (TRP: Transmission ⁇ Reception ⁇ Point) every predetermined number of repetitions (for example, one repetition).
- TRP Transmission ⁇ Reception ⁇ Point
- an object of the present disclosure is to provide a user terminal capable of appropriately controlling repetitive transmission using one or more transmission / reception points.
- the user terminal based on a set of transmission parameters set for each repetition in the repetition transmission, and information included in downlink control information instructing the repetition transmission, the repetition of each And a receiving unit that receives a downlink shared channel repeatedly transmitted from one or more transmission / reception points based on the predetermined condition.
- FIG. 1A and 1B are diagrams illustrating an example of repeated transmission using a plurality of TRPs.
- FIG. 2 is a diagram illustrating an example of a QCL index and an RV index corresponding to repetition.
- FIG. 3 is a diagram illustrating an example of a TRP index and an RV index specified by DCI for each repetition.
- FIG. 4 is a diagram illustrating an example of a schematic configuration of the wireless communication system according to the embodiment.
- FIG. 5 is a diagram illustrating an example of a configuration of the base station according to the embodiment.
- FIG. 6 is a diagram illustrating an example of a configuration of the user terminal according to the embodiment.
- FIG. 7 is a diagram illustrating an example of a hardware configuration of the base station and the user terminal according to the embodiment.
- Multi-slot transmission is transmission over multiple slots and may be referred to as slot aggregation, repetition transmission, and so on. Multi-slot transmission can be expected to increase coverage and improve reception quality.
- the UE when the UE is configured to repeatedly transmit a certain channel using higher layer signaling, physical layer signaling, or a combination thereof, the UE may repeatedly transmit the channel or receive the repeatedly transmitted channel.
- a signal having the same content may be transmitted, or a signal having a different content may be transmitted.
- the upper layer signaling may be, for example, any of RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information, and the like, or a combination thereof.
- RRC Radio Resource Control
- MAC Medium Access Control
- the MAC signaling may use, for example, a MAC control element (MAC CE (Control Element)), a MAC PDU (Protocol Data Unit), or the like.
- the broadcast information includes, for example, a master information block (MIB: Master Information Block), a system information block (SIB: System Information Block), minimum system information (RMSI: Remaining Minimum System Information), and other system information (OSI: Other). System @ Information).
- the physical layer signaling may be, for example, downlink control information (DCI: Downlink Control Information).
- DCI Downlink Control Information
- the number of repetitions may be set to the UE by higher layer signaling (eg, RRC parameter “aggregationFactorUL” for PUSCH, RRC parameter “repK” for configured grant PUSCH). For example, 1, 2, 4, 8, or the like may be set as the number of PUSCH repetitions. Further, the redundancy version (RV: Redundancy @ Version) of the PUSCH in each slot during the repeated transmission of the PUSCH may be different or the same.
- RRC parameter “aggregationFactorUL” for PUSCH, RRC parameter “repK” for configured grant PUSCH For example, 1, 2, 4, 8, or the like may be set as the number of PUSCH repetitions.
- RV Redundancy @ Version
- the PUCCH repetition may be configured in the UE for a specific format (eg, PUCCH formats 1, 3, and 4 with a transmission period of four or more symbols).
- the repetition number (repetition factor, repetition factor, for example, a parameter “nrofSlots” included in “PUCCH-FormatConfig” of RRC) may be commonly set for all of PUCCH formats 1, 3, and 4.
- the number of repetitions may be set by higher layer signaling (eg, for PDSCH, RRC parameter “aggregationFactorDL”).
- RRC parameter “aggregationFactorDL” As the number of repetitions of the PDSCH repetition, for example, 1, 2, 4, 8, or the like may be set.
- the repetition number (repetition number), the repetition factor, the repetition coefficient, and K may be interchanged with each other.
- the number of repetitions may represent the number of repetitions of a specific UL transmission (for example, PUSCH, PUCCH) or a DL transmission (for example, PDSCH, PDCCH).
- NR also, in the case of NR, it has been studied to transmit at least one (channel / signal) of a channel and a signal (repetition) assuming a plurality of transmission / reception points (TRP: Transmission / Reception / Point).
- the channel / signal is, for example, PDSCH, PDCCH, PUSCH, PUCCH, DL-RS, uplink reference signal (UL-RS), etc., but is not limited to this.
- FIGS. 1A and 1B are diagrams illustrating an example of repeated transmission of a channel / signal using a plurality of TRPs.
- FIG. 1A shows an example of repeated transmission of a downlink channel (for example, PDSCH) using TRP # 1 to # 4
- FIG. 1B shows an uplink channel (for example, PUSCH) using TRP # 1 to # 4.
- PUCCH Physical Uplink Control Channel
- FIG. 1 shows an example in which the geographical positions (TCI state or pseudo collocation) of TRPs # 1 to # 4 are different.
- TRP # 1 and QCL # 1 correspond
- TRP # 2 and QCL # 2 correspond
- TRP # 3 and QCL # 3 correspond
- TRP # 4 and QCL # 4 correspond.
- TRP # 1 to TRP # 4 may be different antenna panels installed at the same transmission location.
- the number of TRPs used for repeated transmission is not limited to the illustrated one.
- TRP may be paraphrased as a network, a base station, an antenna device, an antenna panel, a serving cell, a cell, a component carrier (CC), a carrier, or the like.
- the TRP is the same” means that the TCI state, QCL or QCL relation, precoding, beamforming, or between different transmission / reception signals or channels or between their reference signals.
- the spatial reception parameters are the same.
- “different TRP” for different transmitted / received signals or channels means that the TCI state, QCL or QCL relation, precoding, beamforming, or spatial reception between different transmitted / received signals or channels or between their reference signals. In other words, the parameters may be different.
- the UE may control the reception process or the transmission process of the channel / signal based on the information (QCL information) on the QCL of at least one of the predetermined channel and the signal (channel / signal).
- the receiving process corresponds to, for example, at least one of demapping, demodulation, and decoding.
- the transmission processing corresponds to at least one of mapping, modulation, and code.
- a Doppler shift (doppler shift), a Doppler spread (doppler spread), an average delay (average delay), and a delay spread (delay) among these different signals.
- Doppler shift a Doppler shift
- Doppler spread a Doppler spread
- average delay average delay
- delay spread a delay spread among these different signals. spread
- spatial parameters e.g., Spatial @ Rx @ Parameter
- the spatial reception parameter may correspond to a reception beam (eg, a reception analog beam) or a transmission beam (eg, a transmission analog beam) of the user terminal, and the beam may be specified based on the spatial QCL.
- the QCL and at least one element of the QCL in the present disclosure may be replaced with sQCL (spatial @ QCL).
- QCL types A plurality of types (QCL types) may be defined for the QCL.
- QCL types AD QCL types with different parameters (or parameter sets) that can be assumed to be the same may be provided, and are described below.
- QCL type A Doppler shift, Doppler spread, average delay and delay spread
- QCL type B Doppler shift and Doppler spread
- QCL type C Doppler shift and average delay
- QCL type D spatial reception parameters.
- the state (TCI-state) of the transmission configuration instruction indicates QCL information of a predetermined channel / signal (for example, PDSCH, PDCCH, PUCCH, PUSCH, etc.). Is also good.
- the TCI state is identified by a predetermined identifier (TCI state ID (TCI-StateId)), and a target channel / signal (or a reference signal for the channel (or an antenna port of the reference signal)) and another signal (For example, information (QCL information (QCL-Info)) related to QCL with another downlink reference signal (DL-RS: Downlink Reference Signal) or uplink reference signal (UL-RS: Uplink Reference Signal) may be indicated. (May include).
- the QCL information includes, for example, information (RS-related information) on a DL-RS or UL-RS (hereinafter, also simply referred to as RS) having a QCL relationship with a target channel / signal and information indicating the QCL type (QCL type information). ), And may include at least one of information on a carrier (cell) in which the RS is arranged and BWP.
- RS-related information information on a DL-RS or UL-RS
- QCL type information information indicating the QCL type
- the RS-related information may include information indicating at least one of an RS having a QCL relationship with a target channel / signal and resources of the RS. For example, when a plurality of reference signal sets (RS sets) are set in the user terminal, the RS-related information has a QCL relationship with a channel (or a port for the channel) among the RSs included in the RS set. At least one of an RS and a resource for the RS may be indicated.
- RS sets reference signal sets
- the DL-RS includes, for example, a synchronization signal (SS: Synchronization Signal), a broadcast channel (PBCH: Physical Broadcast Channel), a synchronization signal block (SSB: Synchronization Signal Block), a mobility reference signal (MRS: Mobility RS), and channel state information.
- SS Synchronization Signal
- PBCH Physical Broadcast Channel
- SSB Synchronization Signal Block
- MRS Mobility RS
- CSI-RS Channel ⁇ State ⁇ Information-Reference ⁇ Signal
- CSI-RS Channel ⁇ State ⁇ Information-Reference ⁇ Signal
- a tracking CSI-RS a tracking CSI-RS
- a beam-specific signal or a signal configured by expanding or changing these (for example, density and (A signal configured by changing at least one of the periods).
- the synchronization signal may be, for example, at least one of a primary synchronization signal (PSS: Primary Synchronization Signal) and a secondary synchronization signal (SSS: Secondary Synchronization Signal).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- the SSB is a signal block including a synchronization signal and a broadcast channel, and may be called an SS / PBCH block or the like.
- the UL-RS may be, for example, a sounding reference signal (SRS).
- SRS sounding reference signal
- the present inventors have conceived that by setting transmission parameters for each repetition included in repetitive transmission, it is possible to flexibly control repetitive transmission using a plurality of transmission / reception points.
- a method of notifying a UE of a predetermined condition (or predetermined transmission parameter) applied to each repetition of repetitive transmission from a base station will be described below.
- the repetitive transmission described below may be applied to each of a downlink channel (for example, PDSCH) and an uplink channel (for example, PUSCH and PUCCH).
- the predetermined channel may be read as PDSCH, PUSCH or PUCCH.
- the base station may notify the UE of information on a TRP corresponding to each repetition of the repetitive transmission (or a TRP in which each repetitive transmission is performed).
- Information on TRP also referred to as TRP-related information
- TRP-related information includes pseudo collocation (QCL index or QCL-reference), TCI state (or TCI index), precoder (Precoder), reference signal index (RS @ index), TRP index,
- SRI SRS resource indicator
- a QCL index will be described as an example of the TRP-related information.
- the QCL index may be read as any one of a TCI state (or a TCI index), a precoder, a reference signal index, a TRP index, and an SRI. Is also good.
- the base station may notify the UE of a sequence set of TRP-related information (QCL index or QCL-reference) applied to repeated transmission.
- TRP-related information QCL index or QCL-reference
- the base station when the base station applies repetitive transmission to a predetermined channel, the base station transmits information on the number of repetitive transmissions (also referred to as a repetition factor K) and information on a redundant version applied to each repetition (hereinafter also referred to as RV information). At least one may be notified to the UE.
- the base station may specify the association between the TRP-related information and the RV information to the UE as a predetermined condition (or a predetermined parameter) applied to each repetition.
- the base station may specify to the UE association of TRP-related information, RV information, and a repetition factor as predetermined conditions applied to each repetition.
- the base station uses upper layer signaling (for example, RRC signaling or broadcast information) to notify the UE of a candidate set of transmission parameters applied to each repetition of repetition transmission, and to transmit downlink control information (for example, , DCI) may be used to specify a particular candidate set.
- RRC signaling for example, RRC signaling or broadcast information
- downlink control information for example, , DCI
- the candidate set of transmission parameters may be a candidate set of TRP-related information (eg, a TRP-related information sequence) or a candidate set of RV information (eg, an RV sequence).
- the candidate set of transmission parameters may be a combination of a candidate set of TRP-related information (eg, a sequence set of QCL index) and a candidate set of RV information (eg, a sequence set of RV index).
- the UE can determine the transmission conditions for each repetition by cycling the TRP-related information sequence and the value set in the RV sequence according to the repetition transmission (repetition factor) specified by the base station.
- one DCI may be transmitted for repeated transmission, or each DCI may be transmitted for each repetition in repeated transmission.
- the base station may set the following information in the UE using higher layer signaling.
- the base station may set the sequence of the QCL index (or QCL-reference) applied to the repetitive transmission for the N TRPs to the UE by a predetermined set (for example, M sets). M and N may be the same value or different values.
- the sequence of the QCL index may be associated with the QCL index corresponding to each repetition.
- a sequence of M (M ⁇ 1) types of QCL indexes for a predetermined channel may be set by higher layer signaling.
- the number M of sets of the sequence of the QCL index set in the UE may be determined by at least one of the capability (UE capability) of the UE, the QCL type, and the number of TRPs.
- the DCI corresponding to the predetermined channel may include a predetermined field for specifying a sequence of a specific QCL index.
- the value of the predetermined field in the DCI may indicate the TCI state activated by MAC @ CE or one of the SRS resources.
- a specific sequence set may be designated to the UE using DCI.
- the UE selects a specific QCL index sequence from a plurality of sets of QCL index sequences (sequence candidate sets) set in an upper layer based on a predetermined field included in the DCI.
- the format of the sequence may be set, for example, as follows. It should be noted that N, i, j, g ⁇ 1 may be satisfied. ⁇ (First QCL index of TRP # 1, second QCL index of TRP # 1, i-th QCL index of TRP # 1), (first QCL index of TRP # 2, TRP # 2 , The jth QCL index of TRP # 2),. . . (1st QCL index of TRP # N, 2nd QCL index of TRP # N, ... gth QCL index of TRP # N) ⁇
- the base station may set a QCL index corresponding to the same TRP for different repetitions.
- the QCL indexes may be the same or different.
- the base station may notify the UE of information on the maximum value (for example, y) of the number of repetitions to be applied to repetitive transmission to the UE by higher layer signaling.
- the base station may specify the repetition factor K (K ⁇ y) to the UE using DCI. This makes it possible to dynamically control the number of repetitions applied to repetitive transmission.
- the base station may set information on a redundancy version (RV) sequence corresponding to each repetition to the UE by higher layer signaling.
- RV redundancy version
- RV is used for data encoding and rate matching, and indicates a difference in data redundancy.
- the value of the redundancy version (RV value) is, for example, 0, 1, 2, or 3, and 0 is suitably used for the first transmission because the degree of redundancy is the lowest.
- the base station may set ⁇ 0,0,0,0 ⁇ , ⁇ 0,3,0,3 ⁇ , or ⁇ 0,3,2,1 ⁇ , etc. in the UE as the RV sequence for repetition. Good.
- the base station may set a combination candidate of the sequence of the QCL index and the RV sequence in the UE by higher layer signaling, and specify a specific combination using DCI.
- the UE may cyclically apply the set QCL index sequence and RV sequence for K repetitions. That is, the circulation of the QCL index sequence (QCL-references @ sequence @ cycling) and the circulation of the RV sequence (RV @ sequence @ cycling) are repeatedly applied.
- N 2
- the sequence of the QCL index is ⁇ (1,2), (3,4) ⁇
- the RV sequence is ⁇ 0,3,0,3 ⁇
- the repetition factor is 8
- the UE may cyclically apply the QCL index and the RV index set for eight repetitions.
- the base station specifies a specific candidate to the UE by using DCI from a candidate set (for example, at least one of a set of QCL index sequences and a set of RV index sequences) set in an upper layer.
- a candidate set for example, at least one of a set of QCL index sequences and a set of RV index sequences
- the base station uses a bit (or a code point) of a predetermined field included in the DCI to specify information on TRP (for example, TRP-related information) and information on an RV value applied to each repetition.
- a frequency-hopping indication field included in the 15 DCIs is set using one or two bits of the most significant bit (MSB bits) of resource allocation (for example, type 1 resource allocation). .
- a unit of communication processing is performed in a short TTI, a low modulation / coding scheme (low MCS Index) is applied, and the communication processing is performed using a wide bandwidth. It is assumed that Therefore, a sufficient frequency diversity gain has already been obtained, and the effect obtained by frequency hopping is reduced.
- a predetermined communication service for example, URLLC
- the field for specifying the TRP-related information may be set using the two most significant bits of the resource allocation.
- a field for designating frequency hopping may not be set. The UE may assume that the field specifying TRP-related information and the field specifying frequency hopping are not set at the same time.
- the field for specifying the TRP-related information is a precoder-cycling notification field (Precoder-cycling-indication-field), a QCL cycling notification field (QCL-cycling-indication-field), an SRI cycling notification field (SRI-cycling-indication-field), or a precoder / QCL. / SRI cycling notification field (Precoder / QCL / SRI-cycling indication field).
- the field for designating the TRP-related information may be set by using one bit of the most significant bit of resource allocation.
- a field for designating frequency hopping may be set with one bit.
- the field for designating the TRP-related information may be set using some or all bits of other fields included in the DCI, or may be newly set.
- the virtual resource block-physical resource block mapping notification field (VRB-to-PRB mapping indication field) included in the 15 DCIs is set by one bit.
- a unit of communication processing is performed in a short TTI, a low modulation / coding scheme (low MCS Index) is applied, and the communication processing is performed using a wide bandwidth. It is assumed that Therefore, sufficient frequency diversity gain has already been obtained, and the effect obtained by applying interleaving (mapping from virtual resource blocks to physical resource blocks) is reduced.
- a low modulation / coding scheme low MCS Index
- the field for specifying the TRP related information may be set using the virtual resource block-physical resource block mapping notification field.
- the virtual resource block-physical resource block mapping notification field may not be set. The UE may assume that the field specifying the TRP related information and the virtual resource block-physical resource block mapping notification field are not set at the same time.
- the field for designating the TRP-related information may be set using some or all bits of other fields included in the DCI, or may be newly set.
- the notification of the sequence (for example, also referred to as a QCL cycling sequence) of the TRP-related information (for example, the QCL index), the notification of the RV sequence, and the repetition factor may be transmitted in different fields of DCI, or may be transmitted in the same field ( joint field).
- a QCL cycling sequence for example, the QCL index
- the notification of the RV sequence may be transmitted in different fields of DCI, or may be transmitted in the same field ( joint field).
- FIG. 3 shows an example of a table in which a sequence of TRP-related information (for example, a TRP index sequence) and an RV sequence are defined in association with each other.
- the UE may determine TRP related information (for example, TRP index) corresponding to each repetition and the value of RV based on a predetermined field included in DCI.
- TRP # 0- # 3 different TRPs (here, TRP # 0- # 3) are set for each repetition. For example, when the repetition factor is 4, four repetitive transmissions are performed using different TRPs. For example, if the base station cannot determine which TRP is appropriate for the UE, it sets repetitive transmission using a plurality of TRPs.
- the RV sequence (the value of RV corresponding to each repetition) be the same value (for example, # 0). That is, when the TRP index of each repetition is set differently (or cyclically), the value of the RV corresponding to each repetition is fixedly set. Thus, even when a different TRP is applied to each repetition, reception processing such as decoding for a channel corresponding to each repetition can be appropriately performed.
- TRP # 0 and TPR # 1 a plurality of TRPs (here, TRP # 0 and TPR # 1) are set for each repetition, and the same TRP is set for some repetitions.
- the repetition factor is 4, four repetitions are performed using TRP # 0 and TRP # 1 twice.
- the base station sets repetitive transmission using some TRPs among a plurality of TRPs.
- TRP # 0 and TPR # 2 a plurality of TRPs (here, TRP # 0 and TPR # 2) are set for each repetition, and the same TRP is set for some repetitions.
- the repetition factor is 4, four repetitions are performed using TRP # 0 and TRP # 2 twice.
- the base station can determine that TRP # 0 and TRP # 2 are suitable for the UE, the base station sets repetitive transmission using some of the plurality of TRPs.
- the base station sets repetitive transmission using a specific TRP among a plurality of TRPs.
- the RV sequence (RV value corresponding to each repetition) be a different value (for example, # 0, # 2, # 3, # 1). That is, when the TRP index of each repetition is set to the same (or fixed), the value of the RV corresponding to each repetition is set differently (or cyclically). By this means, when the same TRP is applied to each repetition, channels to which different RVs have been applied can be received, so that the probability of successful reception can be improved.
- wireless communication system Wireless communication system
- communication is performed using any of the wireless communication methods according to the above embodiments of the present disclosure or a combination thereof.
- FIG. 4 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment.
- the wireless communication system 1 may be a system that realizes communication using LTE (Long Term Evolution) and 5G NR (5th generation mobile communication system New Radio) specified by 3GPP (Third Generation Partnership Project). .
- LTE Long Term Evolution
- 5G NR Fifth Generation mobile communication system New Radio
- the wireless communication system 1 may support dual connectivity between a plurality of RATs (Radio Access Technology) (multi-RAT dual connectivity (MR-DC: Multi-RAT Dual Connectivity)).
- MR-DC is based on dual connectivity (EN-DC: E-UTRA-NR @ Dual Connectivity) between LTE (Evolved Universal Terrestrial Radio Access) and NR, and dual connectivity (NE-DC with E-UTRA-NR Dual Connectivity).
- -DC NR-E-UTRA (Dual Connectivity) may be included.
- the base station (eNB) of LTE (E-UTRA) is a master node (MN: Master @ Node), and the base station (gNB) of NR is a secondary node (SN: Secondary @ Node).
- MN Master @ Node
- gNB secondary node
- SN Secondary @ Node
- the NR base station (gNB) is the MN
- the LTE (E-UTRA) base station (eNB) is the SN.
- the wireless communication system 1 has dual connectivity between a plurality of base stations in the same RAT (for example, dual connectivity in which both MN and SN are NR base stations (gNB) (NN-DC: NR-NR Dual Connectivity)). ) May be supported.
- a plurality of base stations in the same RAT for example, dual connectivity in which both MN and SN are NR base stations (gNB) (NN-DC: NR-NR Dual Connectivity)).
- the wireless communication system 1 includes a base station 11 forming a macro cell C1 having relatively wide coverage, and a base station 12 (12a to 12c) arranged in the macro cell C1 and forming a small cell C2 smaller than the macro cell C1. May be provided.
- User terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminals 20 are not limited to the modes shown in the figure.
- the base stations 11 and 12 are not distinguished, they are collectively referred to as a base station 10.
- the user terminal 20 may be connected to at least one of the plurality of base stations 10.
- the user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation) using a plurality of component carriers (CC: Component Carrier) and dual connectivity (DC).
- Carrier Aggregation Carrier Aggregation
- CC Component Carrier
- DC dual connectivity
- Each CC may be included in at least one of the first frequency band (FR1: FrequencyFRange 1) and the second frequency band (FR2: Frequency Range 2).
- the macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2.
- FR1 may be a frequency band of 6 GHz or less (sub-6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz).
- the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.
- the user terminal 20 may perform communication using at least one of time division duplex (TDD: Time Division Duplex) and frequency division duplex (FDD: Frequency Division Duplex) in each CC.
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- the plurality of base stations 10 may be connected by wire (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface, or the like) or wirelessly (for example, NR communication).
- wire for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface, or the like
- NR communication for example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station is an IAB (Integrated Access Backhaul) donor, and the base station 12 corresponding to the relay station (relay) is the IAB It may be called a node.
- IAB Integrated Access Backhaul
- the base station 10 may be connected to the core network 30 via another base station 10 or directly.
- the core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), and the like.
- EPC Evolved Packet Core
- 5GCN 5G Core Network
- NGC Next Generation Core
- the user terminal 20 may be a terminal that supports at least one of the communication systems such as LTE, LTE-A, and 5G.
- an orthogonal frequency division multiplexing (OFDM) based wireless access scheme may be used.
- OFDM Orthogonal frequency division multiplexing
- CP-OFDM Cyclic Prefix OFDM
- DFT-s-OFDM Discrete Fourier Transform Spread OFDM
- OFDMA Orthogonal Frequency Division Divide Multiple
- SC-FDMA Single Carrier Frequency Frequency Division Multiple Access
- the wireless access scheme may be referred to as a waveform.
- another wireless access method for example, another single carrier transmission method or another multi-carrier transmission method
- a downlink shared channel (PDSCH: Physical Downlink Shared Channel), a broadcast channel (PBCH: Physical Broadcast Channel), and a downlink control channel (PDCCH: Physical Downlink Control) are shared by the user terminals 20 as downlink channels. Channel) may be used.
- PDSCH Physical Downlink Shared Channel
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control
- an uplink shared channel (PUSCH: Physical Uplink Shared Channel) shared by each user terminal 20, an uplink control channel (PUCCH: Physical Uplink Control Channel), a random access channel (PRACH) : Physical Random Access Channel) or the like may be used.
- PUSCH Physical Uplink Shared Channel
- PUCCH Physical Uplink Control Channel
- PRACH random access channel
- the user data, upper layer control information, SIB (System Information Block), and the like are transmitted by the PDSCH.
- User data, higher layer control information, and the like may be transmitted by the PUSCH.
- MIB Master Information Block
- PBCH Physical Broadcast Channel
- Lower layer control information may be transmitted by the PDCCH.
- the lower layer control information may include, for example, downlink control information (DCI: Downlink Control Information) including scheduling information of at least one of the PDSCH and the PUSCH.
- DCI Downlink Control Information
- DCI for scheduling the PDSCH may be referred to as DL assignment, DL @ DCI, or the like
- the DCI for scheduling the PUSCH may be referred to as UL grant, UL @ DCI, or the like.
- PDSCH may be replaced with DL data
- PUSCH may be replaced with UL data.
- a control resource set (CORESET: Control REsource SET) and a search space (search space) may be used for detecting the PDCCH.
- CORESET corresponds to a resource for searching DCI.
- the search space corresponds to a search area and a search method of PDCCH candidates (PDCCH @ candidates).
- One coreset may be associated with one or more search spaces.
- the UE may monitor a RESET associated with a search space based on the search space settings.
- One SS may correspond to a PDCCH candidate corresponding to one or a plurality of aggregation levels (aggregation Level).
- One or more search spaces may be referred to as a search space set.
- search space “search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, and the like in the present disclosure may be interchanged with each other.
- PUCCH Physical Uplink Control Channel
- CSI Channel ⁇ State ⁇ Information
- HARQ-ACK Hybrid ⁇ Automatic ⁇ Repeat ⁇ reQuest
- ACK / NACK ACK / NACK or the like
- scheduling request SR: Scheduling ⁇ Request
- a random access preamble for establishing a connection with a cell may be transmitted by the PRACH.
- a downlink, an uplink, and the like may be expressed without a “link”.
- various channels may be expressed without “Physical” at the beginning.
- a synchronization signal (SS: Synchronization Signal), a downlink reference signal (DL-RS: Downlink Reference Signal), or the like may be transmitted.
- a DL-RS a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), and a demodulation reference signal (DMRS: DeModulation) are provided.
- Reference Signal a position determination reference signal (PRS: Positioning Reference Signal), a phase tracking reference signal (PTRS: Phase Tracking Reference Signal), and the like may be transmitted.
- PRS Positioning Reference Signal
- PTRS Phase Tracking Reference Signal
- the synchronization signal may be, for example, at least one of a primary synchronization signal (PSS: Primary Synchronization Signal) and a secondary synchronization signal (SSS: Secondary Synchronization Signal).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- a signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SSB (SS @ Block), and the like. Note that SS, SSB, and the like may also be referred to as reference signals.
- a measurement reference signal (SRS: Sounding Reference Signal), a demodulation reference signal (DMRS), and the like may be transmitted as an uplink reference signal (UL-RS: Uplink Reference Signal).
- SRS Sounding Reference Signal
- DMRS demodulation reference signal
- UL-RS Uplink Reference Signal
- the DMRS may be called a user terminal specific reference signal (UE-specific Reference Signal).
- FIG. 5 is a diagram illustrating an example of a configuration of the base station according to the embodiment.
- the base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140.
- the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140 may each include one or more.
- base station 10 also has other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.
- the control unit 110 controls the entire base station 10.
- the control unit 110 can be configured by a controller, a control circuit, and the like described based on common recognition in the technical field according to the present disclosure.
- the control unit 110 may control signal generation, scheduling (for example, resource allocation, mapping), and the like.
- the control unit 110 may control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.
- the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the generated data to the transmission / reception unit 120.
- the control unit 110 may perform call processing (setting, release, etc.) of the communication channel, state management of the base station 10, management of radio resources, and the like.
- the transmission / reception unit 120 may include a baseband unit 121, an RF (Radio Frequency) unit 122, and a measurement unit 123.
- the baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212.
- the transmission / reception unit 120 includes a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transmission / reception circuit, and the like described based on common recognition in the technical field according to the present disclosure. be able to.
- the transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.
- the transmission unit may include a transmission processing unit 1211 and an RF unit 122.
- the receiving unit may include a reception processing unit 1212, an RF unit 122, and a measurement unit 123.
- the transmission / reception antenna 130 can be configured from an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna or the like.
- the transmission / reception unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmission / reception unit 120 may receive the above-described uplink channel, uplink reference signal, and the like.
- the transmission / reception unit 120 may form at least one of the transmission beam and the reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission / reception unit 120 processes the data, control information, and the like acquired from the control unit 110 in the PDCP (Packet Data Convergence Protocol) layer and the RLC (Radio Link Control) layer processing (for example, RLC retransmission control), MAC (Medium Access Control) layer processing (for example, HARQ retransmission control), and the like may be performed to generate a bit string to be transmitted.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- the transmission / reception unit 120 performs channel coding (may include error correction coding), modulation, mapping, filter processing, and discrete Fourier transform (DFT: Discrete Fourier Transform) processing on a bit string to be transmitted.
- channel coding may include error correction coding
- modulation may include error correction coding
- mapping may include error correction coding
- filter processing may include discrete Fourier transform (DFT: Discrete Fourier Transform) processing on a bit string to be transmitted.
- DFT discrete Fourier transform
- Transmission processing such as Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-analog conversion (if necessary) may be performed to output a baseband signal.
- IFFT Inverse Fast Fourier Transform
- precoding may be performed to output a baseband signal.
- digital-analog conversion if necessary
- the transmission / reception unit 120 may perform modulation, filtering, amplification, and the like on the baseband signal into a radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 130. .
- the transmission / reception unit 120 may perform amplification, filtering, demodulation to a baseband signal, and the like on the radio frequency band signal received by the transmission / reception antenna 130.
- the transmission / reception unit 120 (reception processing unit 1212) performs analog-to-digital conversion, fast Fourier transform (FFT: Fast Fourier Transform) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. Applying reception processing such as processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, Etc. may be obtained.
- FFT Fast Fourier Transform
- IDFT inverse discrete Fourier transform
- the transmission / reception unit 120 may measure the received signal.
- the measurement unit 123 may perform RRM (Radio Resource Management) measurement, CSI (Channel State Information) measurement, or the like based on the received signal.
- the measuring unit 123 receives the reception power (for example, RSRP (Reference Signal Received Power)), reception quality (for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio, SNR (Signal to Noise Ratio)).
- Signal strength for example, RSSI (Received Signal Strength Indicator)
- channel information for example, CSI
- the measurement result may be output to the control unit 110.
- the transmission line interface 140 transmits / receives signals (backhaul signaling) to / from a device included in the core network 30 or another base station 10, and transmits user data (user plane data) for the user terminal 20; Data and the like may be obtained and transmitted.
- the transmission unit and the reception unit of the base station 10 may be configured by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.
- the transmission / reception unit 120 may repeatedly transmit the downlink shared channel using one or more transmission / reception points.
- the transmission / reception unit 120 may receive an uplink channel (eg, PUSCH or PUCCH) repeatedly transmitted from the UE using one or more transmission / reception points.
- an uplink channel eg, PUSCH or PUCCH
- the control unit 110 sets a transmission parameter set for each repetition in the repetition transmission in the UE using upper layer signaling, and performs each repetition based on information included in downlink control information instructing repetition transmission. Control is performed so as to notify the UE of a predetermined condition to be applied.
- FIG. 6 is a diagram illustrating an example of a configuration of the user terminal according to the embodiment.
- the user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. Note that one or more of the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may be provided.
- the control unit 210 controls the entire user terminal 20.
- the control unit 210 can be configured by a controller, a control circuit, and the like described based on common recognition in the technical field according to the present disclosure.
- the control unit 210 may control signal generation, mapping, and the like.
- the control unit 210 may control transmission / reception and measurement using the transmission / reception unit 220 and the transmission / reception antenna 230.
- the control unit 210 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the generated data to the transmission / reception unit 220.
- the transmission / reception unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223.
- the baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212.
- the transmission / reception unit 220 can be configured from a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like, which are described based on common recognition in the technical field according to the present disclosure.
- the transmission / reception unit 220 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.
- the transmission unit may include a transmission processing unit 2211 and an RF unit 222.
- the receiving unit may include a reception processing unit 2212, an RF unit 222, and a measurement unit 223.
- the transmission / reception antenna 230 can be configured from an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna or the like.
- the transmission / reception unit 220 may receive the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmission / reception unit 220 may transmit the above-described uplink channel, uplink reference signal, and the like.
- the transmission / reception unit 220 may form at least one of the transmission beam and the reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission / reception unit 220 (transmission processing unit 2211) performs processing of the PDCP layer, processing of the RLC layer (for example, RLC retransmission control), processing of the MAC layer (for example, for data, control information, and the like acquired from the control unit 210, for example). , HARQ retransmission control), etc., to generate a bit string to be transmitted.
- the transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (which may include error correction coding), modulation, mapping, filter processing, DFT processing (if necessary), IFFT processing on the bit sequence to be transmitted. , Precoding, digital-analog conversion, etc., and output a baseband signal.
- whether to apply the DFT processing may be based on the transform precoding setting.
- the transmission / reception unit 220 transmits the channel using the DFT-s-OFDM waveform.
- DFT processing may be performed as the transmission processing, or otherwise, DFT processing may not be performed as the transmission processing.
- the transmission / reception unit 220 may perform modulation, filtering, amplification, and the like on the baseband signal into a radio frequency band, and transmit a signal in the radio frequency band via the transmission / reception antenna 230. .
- the transmission / reception unit 220 may perform amplification, filtering, demodulation to a baseband signal, and the like on the radio frequency band signal received by the transmission / reception antenna 230.
- the transmission / reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, decoding (error correction) on the obtained baseband signal. Decoding may be included), reception processing such as MAC layer processing, RLC layer processing, and PDCP layer processing may be applied to acquire user data and the like.
- the transmission / reception unit 220 may measure the received signal.
- the measurement unit 223 may perform RRM measurement, CSI measurement, and the like based on the received signal.
- the measurement unit 223 may measure received power (for example, RSRP), received quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), channel information (for example, CSI), and the like.
- the measurement result may be output to the control unit 210.
- the transmitting unit and the receiving unit of the user terminal 20 may be configured by at least one of the transmitting / receiving unit 220, the transmitting / receiving antenna 230, and the transmission line interface 240.
- the transmission / reception unit 220 may repeatedly transmit an uplink channel (for example, PUSCH or PUCCH) to one or more transmission / reception points.
- the transmission / reception unit 220 may receive a downlink shared channel (for example, PDSCH) repeatedly transmitted from one or more transmission / reception points.
- an uplink channel for example, PUSCH or PUCCH
- a downlink shared channel for example, PDSCH
- the control unit 210 determines a predetermined condition applied to each repetition based on a set of transmission parameters set for each repetition in the repetition transmission and information included in downlink control information instructing the repetition transmission. You may.
- the transmission parameter may include information on the transmission / reception point corresponding to each of the repetitions and information on the redundant version in association with each other.
- the transmission parameters include information on at least one of a pseudo collocation, a TCI state, a precoder, a transmission / reception point index, and a reference signal index corresponding to each of the repetitions, information on the number of repetitions, and information on a redundant version. May be included.
- control unit 210 may control to apply different redundant versions to the plurality of repetitions.
- control unit 210 may perform control so that the same redundant version is applied to a plurality of repetitions.
- each functional block may be realized using one device physically or logically coupled, or directly or indirectly (for example, two or more devices physically or logically separated). , Wired, wireless, etc.), and may be implemented using these multiple devices.
- the functional block may be realized by combining one device or the plurality of devices with software.
- the functions include judgment, determination, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
- a functional block (configuration unit) that causes transmission to function may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
- the realization method is not particularly limited.
- a base station, a user terminal, or the like may function as a computer that performs processing of the wireless communication method according to the present disclosure.
- FIG. 7 is a diagram illustrating an example of a hardware configuration of the base station and the user terminal according to the embodiment.
- the above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. .
- the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices illustrated in the drawing, or may be configured to exclude some of the devices.
- processor 1001 may be implemented by one or more chips.
- the functions of the base station 10 and the user terminal 20 are performed, for example, by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002 so that the processor 1001 performs an arithmetic operation and communicates via the communication device 1004. And controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
- predetermined software program
- the processor 1001 performs an arithmetic operation and communicates via the communication device 1004.
- the processor 1001 controls the entire computer by operating an operating system, for example.
- the processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
- CPU Central Processing Unit
- the control unit 110 (210), the transmitting / receiving unit 120 (220), and the like may be realized by the processor 1001.
- the processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to these.
- a program program code
- a program that causes a computer to execute at least a part of the operation described in the above embodiment is used.
- the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and other functional blocks may be similarly realized.
- the memory 1002 is a computer-readable recording medium, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically EPROM), RAM (Random Access Memory), and other appropriate storage media. It may be constituted by one.
- the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
- the memory 1002 can store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to an embodiment of the present disclosure.
- the storage 1003 is a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc) ROM, etc.), a digital versatile disc, At least one of a Blu-ray (registered trademark) disk, a removable disk, a hard disk drive, a smart card, a flash memory device (eg, a card, a stick, a key drive), a magnetic stripe, a database, a server, and other suitable storage media. May be configured.
- the storage 1003 may be called an auxiliary storage device.
- the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, for example, in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). May be configured.
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the transmission / reception unit 120 (220) and the transmission / reception antenna 130 (230) described above may be realized by the communication device 1004.
- the transmission / reception unit 120 (220) may be physically or logically separated from the transmission unit 120a (220a) and the reception unit 120b (220b).
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an external input.
- the output device 1006 is an output device that performs output to the outside (for example, a display, a speaker, an LED (Light Emitting Diode) lamp, and the like). Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
- the devices such as the processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using a different bus for each device.
- the base station 10 and the user terminal 20 include hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured to include hardware, and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.
- DSP Digital Signal Processor
- ASIC Application Specific Integrated Circuit
- PLD Programmable Logic Device
- FPGA Field Programmable Gate Array
- RS Reference Signal
- a component carrier may be called a cell, a frequency carrier, a carrier frequency, or the like.
- a radio frame may be configured by one or more periods (frames) in the time domain.
- the one or more respective periods (frames) forming the radio frame may be referred to as a subframe.
- a subframe may be configured by one or more slots in the time domain.
- the subframe may be of a fixed length of time (eg, 1 ms) that does not depend on numerology.
- the new melology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
- Numerology includes, for example, subcarrier interval (SCS: SubCarrier @ Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission @ Time @ Interval), number of symbols per TTI, radio frame configuration, transmission and reception.
- SCS SubCarrier @ Spacing
- TTI Transmission @ Time @ Interval
- TTI Transmission @ Time @ Interval
- radio frame configuration transmission and reception.
- At least one of a specific filtering process performed by the transceiver in the frequency domain and a specific windowing process performed by the transceiver in the time domain may be indicated.
- the slot may be configured by one or a plurality of symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain. Further, the slot may be a time unit based on numerology.
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the slot may include a plurality of mini slots.
- Each minislot may be constituted by one or more symbols in the time domain.
- the mini-slot may be called a sub-slot.
- a minislot may be made up of a smaller number of symbols than slots.
- a PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (PUSCH) mapping type A.
- a PDSCH (or PUSCH) transmitted using a minislot may be referred to as a PDSCH (PUSCH) mapping type B.
- Radio frames, subframes, slots, minislots, and symbols all represent time units when transmitting signals.
- the radio frame, the subframe, the slot, the minislot, and the symbol may have different names corresponding to each. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be interchanged with each other.
- one subframe may be called a TTI
- a plurality of consecutive subframes may be called a TTI
- one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1 to 13 symbols), or a period longer than 1 ms. It may be.
- the unit representing the TTI may be called a slot, a minislot, or the like instead of a subframe.
- the TTI refers to, for example, a minimum time unit of scheduling in wireless communication.
- the base station performs scheduling for allocating radio resources (frequency bandwidth, transmission power, and the like that can be used in each user terminal) to each user terminal in TTI units.
- radio resources frequency bandwidth, transmission power, and the like that can be used in each user terminal
- the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, a time section (for example, the number of symbols) in which a transport block, a code block, a codeword, and the like are actually mapped may be shorter than the TTI.
- one slot or one minislot is called a TTI
- one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (mini-slot number) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in 3GPP@Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, and the like.
- a TTI shorter than the normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
- a long TTI (for example, a normal TTI, a subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (for example, a shortened TTI, etc.) may be replaced with a TTI shorter than the long TTI and 1 ms.
- the TTI having the above-mentioned TTI length may be read.
- a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers (subcarriers) in the frequency domain.
- the number of subcarriers included in the RB may be the same irrespective of the numerology, and may be, for example, 12.
- the number of subcarriers included in the RB may be determined based on numerology.
- the RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI.
- One TTI, one subframe, and the like may each be configured by one or a plurality of resource blocks.
- one or more RBs include a physical resource block (PRB: Physical @ RB), a subcarrier group (SCG: Sub-Carrier @ Group), a resource element group (REG: Resource @ Element @ Group), a PRB pair, an RB pair, and the like. May be called.
- PRB Physical @ RB
- SCG Sub-Carrier @ Group
- REG Resource @ Element @ Group
- PRB pair an RB pair, and the like. May be called.
- a resource block may be composed of one or more resource elements (RE: Resource @ Element).
- RE Resource @ Element
- one RE may be a radio resource area of one subcarrier and one symbol.
- a bandwidth part (which may be referred to as a partial bandwidth or the like) may also represent a subset of consecutive common RBs (common @ resource @ blocks) for a certain numerology in a certain carrier. Good.
- the common RB may be specified by an index of the RB based on the common reference point of the carrier.
- a PRB may be defined by a BWP and numbered within the BWP.
- $ BWP may include a BWP for UL (UL @ BWP) and a BWP for DL (DL @ BWP).
- BWP for a UE, one or more BWPs may be configured in one carrier.
- At least one of the configured BWPs may be active, and the UE does not have to assume to transmit and receive a given signal / channel outside the active BWP.
- “cell”, “carrier”, and the like in the present disclosure may be replaced with “BWP”.
- the structures of the above-described radio frame, subframe, slot, minislot, symbol, and the like are merely examples.
- the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, included in an RB The configuration of the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP: Cyclic @ Prefix) length, and the like can be variously changed.
- the information, parameters, and the like described in the present disclosure may be expressed using an absolute value, may be expressed using a relative value from a predetermined value, or may be expressed using another corresponding information. May be represented.
- a radio resource may be indicated by a predetermined index.
- Names used for parameters and the like in the present disclosure are not limited in any respect. Further, the formulas and the like using these parameters may be different from those explicitly disclosed in the present disclosure.
- the various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.) and information elements can be identified by any suitable name, so the various names assigned to these various channels and information elements Is not a limiting name in any way.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. that can be referred to throughout the above description are not limited to voltages, currents, electromagnetic waves, magnetic or magnetic particles, optical or photons, or any of these. May be represented by a combination of
- information, signals, and the like can be output from the upper layer to at least one of the lower layer and the lower layer to the upper layer.
- Information, signals, etc. may be input / output via a plurality of network nodes.
- Information and signals input and output may be stored in a specific place (for example, a memory) or may be managed using a management table. Information and signals that are input and output can be overwritten, updated, or added. The output information, signal, and the like may be deleted. The input information, signal, and the like may be transmitted to another device.
- information notification in the present disclosure includes physical layer signaling (for example, downlink control information (DCI: Downlink Control Information), uplink control information (UCI: Uplink Control Information)), and upper layer signaling (for example, RRC (Radio Resource Control). ) Signaling, broadcast information (master information block (MIB: Master Information Block), system information block (SIB: System Information Block), etc.), MAC (Medium Access Control) signaling), other signals or a combination thereof. Is also good.
- DCI Downlink control information
- UCI Uplink Control Information
- RRC Radio Resource Control
- MIB Master Information Block
- SIB System Information Block
- MAC Medium Access Control
- the physical layer signaling may be called L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like.
- the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
- the MAC signaling may be notified using, for example, a MAC control element (MAC @ CE (Control @ Element)).
- the notification of the predetermined information is not limited to an explicit notification, and is implicit (for example, by not performing the notification of the predetermined information or by another information). May be performed).
- the determination may be made by a value represented by 1 bit (0 or 1), or may be made by a boolean value represented by true or false. , May be performed by comparing numerical values (for example, comparison with a predetermined value).
- software, instructions, information, and the like may be transmitted and received via a transmission medium.
- a transmission medium For example, if the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), the website, When transmitted from a server or other remote source, at least one of these wired and / or wireless technologies is included within the definition of a transmission medium.
- Network may mean a device (eg, a base station) included in the network.
- precoding In the present disclosure, “precoding”, “precoder”, “weight (precoding weight)”, “quasi-co-location (QCL)”, “TCI state (Transmission Configuration Indication state)”, “spatial relation” (Spatial relation), “spatial domain filter”, “transmission power”, “phase rotation”, “antenna port”, “antenna port group”, “layer”, “number of layers”, “ Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, “antenna”, “antenna element”, “panel” are interchangeable Can be used for
- base station (BS: Base @ Station)”, “wireless base station”, “fixed station (fixed @ station)”, “NodeB”, “eNodeB (eNB)”, “gNodeB (gNB)”, “gNodeB (gNB)” "Access point (access @ point)”, “transmission point (TP: Transmission @ Point)”, “reception point (RP: Reception @ Point)”, “transmission / reception point (TRP: Transmission / Reception @ Point)”, “panel”, “cell” , “Sector”, “cell group”, “carrier”, “component carrier” and the like may be used interchangeably.
- a base station may also be referred to as a macro cell, a small cell, a femto cell, a pico cell, or the like.
- a base station can accommodate one or more (eg, three) cells. If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH: Communication services can also be provided by Remote Radio Head)).
- a base station subsystem eg, a small indoor base station (RRH: Communication services can also be provided by Remote Radio Head).
- RRH small indoor base station
- the term “cell” or “sector” refers to part or all of the coverage area of at least one of a base station and a base station subsystem that provides communication services in this coverage.
- MS mobile station
- UE user equipment
- terminal terminal
- a mobile station is a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal. , Handset, user agent, mobile client, client or some other suitable terminology.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like.
- at least one of the base station and the mobile station may be a device mounted on the mobile unit, the mobile unit itself, or the like.
- the moving object may be a vehicle (for example, a car, an airplane, or the like), may be an unmanned moving object (for example, a drone, an autonomous vehicle), or may be a robot (maned or unmanned). ).
- at least one of the base station and the mobile station includes a device that does not necessarily move during a communication operation.
- at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be replaced with a user terminal.
- communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (for example, may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
- D2D Device-to-Device
- V2X Vehicle-to-Everything
- Each aspect / embodiment of the present disclosure may be applied to the configuration.
- the configuration may be such that the user terminal 20 has the function of the base station 10 described above.
- words such as “up” and “down” may be read as words corresponding to communication between terminals (for example, “side”).
- an uplink channel, a downlink channel, and the like may be replaced with a side channel.
- a user terminal in the present disclosure may be replaced by a base station.
- a configuration in which the base station 10 has the function of the user terminal 20 described above may be adopted.
- the operation performed by the base station may be performed by an upper node (upper node) in some cases.
- various operations performed for communication with a terminal include a base station, one or more network nodes other than the base station (eg, Obviously, it can be performed by MME (Mobility Management Entity), S-GW (Serving-Gateway) or the like, but not limited thereto, or a combination thereof.
- MME Mobility Management Entity
- S-GW Serving-Gateway
- Each aspect / embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching with execution.
- the processing procedure, sequence, flowchart, and the like of each aspect / embodiment described in the present disclosure may be interchanged in order as long as there is no contradiction.
- elements of various steps are presented in an exemplary order, and are not limited to the specific order presented.
- LTE Long Term Evolution
- LTE-A Long Term Evolution
- LTE-B Long Term Evolution-Beyond
- SUPER 3G IMT-Advanced
- 4G 4th generation mobile communication
- system 5G (5th generation mobile communication system)
- FRA Fluture Radio Access
- New-RAT Radio Access Technology
- NR New Radio
- NX New radio access
- FX Fluture generation radio access
- GSM Registered trademark
- CDMA2000 Code Division Multiple Access
- UMB Ultra Mobile Broadband
- IEEE 802.11 Wi-Fi (registered trademark)
- IEEE 802.16 WiMAX (registered trademark)
- UWB Ultra-WideBand
- Bluetooth registered trademark
- a system using other appropriate wireless communication methods and a next-generation system extended based on these methods.
- a plurality of systems may be combined (for example, a combination of LTE or LTE-A and 5G) and applied.
- any reference to elements using designations such as "first,” “second,” etc., as used in this disclosure, does not generally limit the quantity or order of those elements. These designations may be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not mean that only two elements can be employed or that the first element must precede the second element in any way.
- determining means judging, calculating, computing, processing, deriving, investigating, searching (upping, searching, inquiry) ( For example, a search in a table, database, or another data structure), ascertaining, etc., may be regarded as "deciding".
- determining includes receiving (eg, receiving information), transmitting (eg, transmitting information), input (input), output (output), and access ( accessing) (e.g., accessing data in a memory) or the like.
- judgment (decision) is regarded as “judgment (decision)” of resolving, selecting, selecting, establishing, comparing, etc. Is also good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of any operation.
- “judgment (decision)” may be read as “assuming”, “expecting”, “considering”, or the like.
- connection refers to any direct or indirect connection or coupling between two or more elements. And may include the presence of one or more intermediate elements between two elements “connected” or “coupled” to each other.
- the coupling or connection between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”.
- the radio frequency domain, microwave It can be considered to be “connected” or “coupled” to each other using electromagnetic energy having a wavelength in the region, light (both visible and invisible) regions, and the like.
- the term “A and B are different” may mean that “A and B are different from each other”.
- the term may mean that “A and B are different from C”.
- Terms such as “separate”, “coupled” and the like may be interpreted similarly to "different”.
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Abstract
Description
NRでは、PUCCH、PUSCH、PDSCH、PDCCHなどのチャネルについて、マルチスロット送信を行うことが検討されている。マルチスロット送信は、複数のスロットにわたる送信であって、スロットアグリゲーション、繰り返し(repetition)送信などと呼ばれてもよい。マルチスロット送信により、カバレッジの拡大、受信品質の向上などが期待できる。
QCLとは、(Quasi-Co-Location)とは、チャネル/信号の統計的性質を示す指標であり、疑似コロケーションとも呼ばれる。UEは、ユーザ端末は、所定のチャネル及び信号の少なくとも一つ(チャネル/信号)のQCLに関する情報(QCL情報)に基づいて、当該チャネル/信号の受信処理又は送信処理を制御してもよい。受信処理は、例えば、デマッピング、復調、復号の少なくとも1つに相当する。送信処理は、マッピング、変調、符号の少なくとも1つに相当する。
・QCLタイプA:ドップラーシフト、ドップラースプレッド、平均遅延及び遅延スプレッド、
・QCLタイプB:ドップラーシフト及びドップラースプレッド、
・QCLタイプC:ドップラーシフト及び平均遅延、
・QCLタイプD:空間受信パラメータ。
1以上のTRPを利用した繰り返し送信を適用する場合、繰り返し送信の各繰り返しに適用される所定条件(又は、所定送信パラメータ)を基地局からUEに通知する方法について以下に説明する。なお、以下に示す繰り返し送信は、下りチャネル(例えば、PDSCH)及び上りチャネル(例えば、PUSCHとPUCCH)に対してそれぞれ適用してもよい。また、以下の説明において所定チャネルをPDSCH、PUSCH又はPUCCHに読み替えてもよい。
基地局は、上位レイヤシグナリングを利用して以下の情報をUEに設定してもよい。
基地局は、N個のTRPに対して、繰り返し送信に適用されるQCLインデックス(又は、QCL-reference)のシーケンスを所定セット(例えば、Mセット)だけUEに設定してもよい。MとNは同じ値であってもよいし、異なる値であってもよい。QCLインデックスのシーケンスは、各繰り返しにそれぞれ対応するQCLインデックスに対応付けられてもよい。
{(TRP#1の1番目のQCLインデックス、TRP#1の2番目のQCLインデックス、...TRP#1のi番目のQCLインデックス)、(TRP#2の1番目のQCLインデックス、TRP#2の2番目のQCLインデックス、...TRP#2のj番目のQCLインデックス)、...(TRP#Nの1番目のQCLインデックス、TRP#Nの2番目のQCLインデックス、...TRP#Nのg番目のQCLインデックス)}
基地局は、繰り返し送信に適用する繰り返し数の最大値(例えば、y)に関する情報を上位レイヤシグナリングでUEに通知してもよい。この場合、基地局は、DCIを利用して繰り返しファクタK(K≦y)をUEに指定してもよい。これにより、繰り返し送信に適用する繰り返し数を動的に制御することが可能となる。
基地局は、各繰り返しに対応する冗長バージョン(RV)シーケンスに関する情報をUEに上位レイヤシグナリングで設定してもよい。
基地局は、上位レイヤで設定した候補セット(例えば、QCLインデックスシーケンスのセット、及びRVインデックスシーケンスのセットの少なくとも一つ)の中から特定の候補をDCIを利用してUEに指定する。例えば、基地局は、DCIに含まれる所定のフィールドのビット(又は、コードポイント)を利用して、各繰り返しに適用するTRPに関する情報(例えば、TRP関連情報)とRV値に関する情報を指定する。
PUSCHに繰り返し送信を適用する場合を想定する。Rel.15のDCIに含まれる周波数ホッピングの通知フィールド(Frequency-hopping indication field)は、リソース割当て(例えば、タイプ1リソース割当て)の最上位ビット(MSB bits)の1又は2ビットを利用して設定される。
PDSCHに繰り返し送信を適用する場合を想定する。Rel.15のDCIに含まれる仮想リソースブロック-物理リソースブロックマッピング通知フィールド(VRB-to-PRB mapping indication field)は、1ビットで設定される。
以下、本開示の一実施形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本開示の上記各実施形態に係る無線通信方法のいずれか又はこれらの組み合わせを用いて通信が行われる。
図5は、一実施形態に係る基地局の構成の一例を示す図である。基地局10は、制御部110、送受信部120、送受信アンテナ130及び伝送路インターフェース(transmission line interface)140を備えている。なお、制御部110、送受信部120及び送受信アンテナ130及び伝送路インターフェース140は、それぞれ1つ以上が備えられてもよい。
図6は、一実施形態に係るユーザ端末の構成の一例を示す図である。ユーザ端末20は、制御部210、送受信部220及び送受信アンテナ230を備えている。なお、制御部210、送受信部220及び送受信アンテナ230は、それぞれ1つ以上が備えられてもよい。
なお、上記実施形態の説明に用いたブロック図は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
なお、本開示において説明した用語及び本開示の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル、シンボル及び信号(シグナル又はシグナリング)は、互いに読み替えられてもよい。また、信号はメッセージであってもよい。参照信号は、RS(Reference Signal)と略称することもでき、適用される標準によってパイロット(Pilot)、パイロット信号などと呼ばれてもよい。また、コンポーネントキャリア(CC:Component Carrier)は、セル、周波数キャリア、キャリア周波数などと呼ばれてもよい。
Claims (6)
- 繰り返し送信における各繰り返しに対してそれぞれ設定される送信パラメータのセットと、前記繰り返し送信を指示する下り制御情報に含まれる情報と、に基づいて前記各繰り返しに適用される所定条件を決定する制御部と、
前記所定条件に基づいて1以上の送受信ポイントから繰り返し送信される下り共有チャネルを受信する受信部と、を有することを特徴とするユーザ端末。 - 前記送信パラメータは、前記各繰り返しにそれぞれ対応する送受信ポイントに関する情報と冗長バージョンに関する情報が関連付けられて含まれることを特徴とする請求項1に記載のユーザ端末。
- 前記送信パラメータは、前記各繰り返しにそれぞれ対応する疑似コロケーション、TCI状態、プリコーダ、送受信ポイントインデックス、及び参照信号インデックスの少なくとも一つに関する情報と、繰り返し回数に関する情報と、冗長バージョンに関する情報と、が含まれることを特徴とする請求項1に記載のユーザ端末。
- 同じ送信ポイントが複数の繰り返しに設定される場合、前記制御部は、前記複数の繰り返しに異なる冗長バージョンを適用することを特徴とする請求項1から請求項3のいずれかに記載のユーザ端末。
- 異なる送信ポイントが複数の繰り返しに設定される場合、前記制御部は、前記複数の繰り返しに同じ冗長バージョンを適用することを特徴とする請求項1から請求項4のいずれかに記載のユーザ端末。
- 繰り返し送信における各繰り返しに対してそれぞれ設定される送信パラメータのセットと、前記繰り返し送信を指示する下り制御情報に含まれる情報と、に基づいて前記各繰り返しに適用される所定条件を決定する制御部と、
前記所定条件に基づいて1以上の送受信ポイントに対して上りチャネルを繰り返し送信する送信部と、を有することを特徴とするユーザ端末。
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- 2018-09-28 EP EP18935676.9A patent/EP3860284A4/en active Pending
- 2018-09-28 US US17/280,494 patent/US20210345306A1/en not_active Abandoned
- 2018-09-28 WO PCT/JP2018/036590 patent/WO2020066021A1/ja unknown
- 2018-09-28 KR KR1020217010736A patent/KR20210068038A/ko not_active Application Discontinuation
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US11218971B2 (en) * | 2019-01-07 | 2022-01-04 | Shanghai Langbo Communication Technology Company Limited | Method and device in node for wireless communication |
US20220086764A1 (en) * | 2019-01-07 | 2022-03-17 | Shanghai Langbo Communication Technology Company Limited | Method and device in node for wireless communication |
US11716690B2 (en) * | 2019-01-07 | 2023-08-01 | Dido Wireless Innovations Llc | Method and device in node for wireless communication |
CN115362741A (zh) * | 2020-04-17 | 2022-11-18 | 联想(北京)有限公司 | Pucch重复数目指示 |
Also Published As
Publication number | Publication date |
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EP3860284A1 (en) | 2021-08-04 |
CN113170482B (zh) | 2024-03-01 |
EP3860284A4 (en) | 2022-04-27 |
CN113170482A (zh) | 2021-07-23 |
US20210345306A1 (en) | 2021-11-04 |
JPWO2020066021A1 (ja) | 2021-09-02 |
KR20210068038A (ko) | 2021-06-08 |
JP7293247B2 (ja) | 2023-06-19 |
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