WO2021181684A1 - 端末、無線通信方法及び基地局 - Google Patents
端末、無線通信方法及び基地局 Download PDFInfo
- Publication number
- WO2021181684A1 WO2021181684A1 PCT/JP2020/011207 JP2020011207W WO2021181684A1 WO 2021181684 A1 WO2021181684 A1 WO 2021181684A1 JP 2020011207 W JP2020011207 W JP 2020011207W WO 2021181684 A1 WO2021181684 A1 WO 2021181684A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reception
- tci
- pdsch
- tci state
- default
- Prior art date
Links
- 238000004891 communication Methods 0.000 title claims description 68
- 238000000034 method Methods 0.000 title claims description 48
- 230000005540 biological transmission Effects 0.000 claims abstract description 144
- 238000012545 processing Methods 0.000 description 56
- 230000011664 signaling Effects 0.000 description 45
- 238000010586 diagram Methods 0.000 description 41
- 238000005259 measurement Methods 0.000 description 25
- 238000013468 resource allocation Methods 0.000 description 23
- 238000013507 mapping Methods 0.000 description 13
- 230000009977 dual effect Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 238000001914 filtration Methods 0.000 description 9
- 238000010295 mobile communication Methods 0.000 description 9
- 125000004122 cyclic group Chemical group 0.000 description 7
- LKKMLIBUAXYLOY-UHFFFAOYSA-N 3-Amino-1-methyl-5H-pyrido[4,3-b]indole Chemical compound N1C2=CC=CC=C2C2=C1C=C(N)N=C2C LKKMLIBUAXYLOY-UHFFFAOYSA-N 0.000 description 6
- 102100031413 L-dopachrome tautomerase Human genes 0.000 description 6
- 101710093778 L-dopachrome tautomerase Proteins 0.000 description 6
- 230000004913 activation Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 101150077548 DCI1 gene Proteins 0.000 description 5
- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 description 5
- 102100038659 Inactive tyrosine-protein kinase PRAG1 Human genes 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000007726 management method Methods 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 4
- 238000004220 aggregation Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 101150071746 Pbsn gene Proteins 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 108700026140 MAC combination Proteins 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 108010015046 cell aggregation factors Proteins 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 238000012384 transportation and delivery Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- 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
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0868—Hybrid systems, i.e. switching and combining
- H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
-
- 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
-
- 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
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
- H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
- H04B7/06968—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping using quasi-colocation [QCL] between signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- 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
- H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
-
- 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
Definitions
- This disclosure relates to terminals, wireless communication methods and base stations in next-generation mobile communication systems.
- LTE Long Term Evolution
- 3GPP Rel.10-14 LTE-Advanced (3GPP Rel.10-14) has been specified for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).
- LTE Long Term Evolution
- 5G 5th generation mobile communication system
- 5G + plus
- NR New Radio
- 3GPP Rel.15 3GPP Rel.15 or later, etc.
- user terminals In future wireless communication systems (eg, NR), user terminals (user terminals, User Equipment (UEs)) will control reception processing based on information about pseudo-collocations (Quasi-Co-Location (QCL)). Is being considered.
- QCL Quad-Co-Location
- one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi-TRP) transmit DL to the UE (for example, using one or more panels (multi-panel)).
- TRP Transmission / Reception Point
- multi-TRP transmit DL to the UE (for example, using one or more panels (multi-panel)).
- PDSCH transmission is being considered.
- the QCL parameter when the multi-panel / TRP is used cannot be appropriately determined. If the QCL parameters cannot be determined appropriately, system performance may deteriorate, such as a decrease in throughput.
- one of the purposes of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately determine QCL parameters for a multi-panel / TRP.
- the terminal is in a state of one or more default transmission setting instructions (Transmission Configuration Indication (TCI)) applied to each reception opportunity of repeated reception of the downlink shared channel (Physical downlink Shared Channel (PDSCH)). It has a control unit for determining the above, and a reception unit for performing the repeated reception using the spatial domain reception filter based on the one or more default TCI states.
- TCI Transmission Configuration Indication
- the QCL parameters for the multi-panel / TRP can be appropriately determined.
- FIG. 1 is a diagram showing an example of QCL assumption of the DMRS port of PDSCH.
- FIG. 2 is a diagram showing an example of repeatedly performing DL reception using a plurality of reception opportunities for a plurality of TRPs.
- FIG. 3A-3D is a diagram showing an example of a multi-TRP scenario.
- FIG. 4 is a diagram showing an example of PDSCH repetition from the multi-TRP.
- FIG. 5 is a diagram showing an example of the scheme 1a of PDSCH repetition.
- 6A and 6B are diagrams showing an example of the scheme 2a of PDSCH repetition.
- 7A and 7B are diagrams showing an example of the scheme 2b of PDSCH repetition.
- 8A and 8B are diagrams showing an example of schemes 3 and 4 of PDSCH repetition.
- FIG. 10 is a diagram showing an example of a TCI state applied to a PDSCH reception opportunity.
- FIG. 11 is a diagram showing an example of a TCI state applied to a PDSCH reception opportunity.
- FIG. 12 is a diagram showing an example of a TCI state applied to a PDSCH reception opportunity.
- FIG. 13 is a diagram showing an example of the TCI state applied to the PDSCH reception opportunity.
- FIG. 14 is a diagram showing an example of a TCI state applied to a PDSCH reception opportunity.
- 15A and 15B are diagrams showing an example of the default TCI state of repeated reception.
- FIG. 16 is a diagram showing an example of the order of TCI state IDs according to the second embodiment.
- 17A and 17B are diagrams showing an example of the default TCI state according to the second embodiment.
- 18A and 18B are diagrams showing an example of the order of beam IDs according to the second embodiment.
- FIG. 19 is a diagram showing an example of the order of CORESET according to the second embodiment.
- FIG. 20 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
- FIG. 21 is a diagram showing an example of the configuration of the base station according to the embodiment.
- FIG. 22 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
- FIG. 23 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
- repeated reception is supported in data reception.
- the base station network (NW), gNB) may repeat the transmission of DL data (for example, downlink shared channel (PDSCH)) a predetermined number of times.
- the UE may repeat the UL data (for example, the uplink shared channel (PUSCH)) a predetermined number of times.
- DL data for example, downlink shared channel (PDSCH)
- PUSCH uplink shared channel
- the UE may schedule a predetermined number of repeated PDSCH receptions by a single DCI.
- the number of repetitions is also referred to as a repetition factor K or an aggregation factor K.
- the nth repetition is also called the nth reception opportunity or the like, and may be identified by the repetition index k (0 ⁇ k ⁇ K-1).
- the UE receives information indicating the repetition coefficient K (for example, aggregationFactorUL or aggregationFactorDL) quasi-statically by upper layer signaling.
- the upper layer signaling may be, for example, any one of RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information, or a combination thereof.
- MAC CE Control Element
- MAC PDU Protocol Data Unit
- the broadcast information may be, for example, a master information block (MIB: Master Information Block), a system information block (SIB: System Information Block), a minimum system information (RMSI: Remaining Minimum System Information), or the like.
- MIB Master Information Block
- SIB System Information Block
- RMSI Remaining Minimum System Information
- the UE receives at least one PDSCH reception process (eg, reception, demapping, demodulation, decoding) in K consecutive slots based on at least one of the following field values in the DCI (or the information indicated by that field value): 1), or control the PUSCH transmission process (eg, at least one of transmission, mapping, modulation, sign): -Assignment of time domain resources (eg start symbol, number of symbols in each slot, etc.), -Allocation of frequency domain resources (for example, a predetermined number of resource blocks (RB: Resource Block), a predetermined number of resource block groups (RBG: Resource Block Group)), -Modulation and Coding Scheme (MCS) index, • PDSCH / PUSCH demodulation reference signal (DMRS) configuration, -PDSCH / PUSCH spatial relation info (spatial relation info) or transmission configuration instruction (TCI: Transmission Configuration Indication or Transmission Configuration Indicator) state (TCI state (TCI-state)).
- DMRS Transmission Configuration In
- the same symbol assignment may be applied between K consecutive slots.
- the UE is based on the start symbol S and the number of symbols L (eg, Start and Length Indicator (SLIV)) determined based on the value m of a predetermined field (eg, time domain resource allocation (TDRA) field) in the DCI.
- L Start and Length Indicator
- TDRA time domain resource allocation
- the symbol assignment in each slot may be determined.
- the UE may determine the first slot based on the K2 information determined based on the value m of a predetermined field of DCI (for example, the TDRA field).
- the redundant version (Redundancy Version (RV)) applied to the TB based on the same data may be the same, or at least a part thereof may be different.
- the RV applied to the TB in the nth slot (reception opportunity, repeat) may be determined based on the value of a predetermined field (eg, RV field) in the DCI.
- reception processing for example, reception, demapping, demodulation, etc.
- the UE receives reception, demapping, demodulation, etc.
- TCI state transmission configuration indication state
- Controlling at least one of decoding and transmission processing eg, at least one of transmission, mapping, precoding, modulation, and coding is being considered.
- the TCI state may represent what applies to the downlink signal / channel.
- the equivalent of the TCI state applied to the uplink signal / channel may be expressed as a spatial relation.
- the TCI state is information related to signal / channel pseudo collocation (Quasi-Co-Location (QCL)), and may be called spatial reception parameters, spatial relation information, or the like.
- the TCI state may be set in the UE on a channel-by-channel or signal-by-signal basis.
- QCL is an index showing the statistical properties of signals / channels. For example, when one signal / channel and another signal / channel have a QCL relationship, Doppler shift, Doppler spread, and average delay are performed between these different signals / channels. ), Delay spread, and spatial parameter (for example, spatial Rx parameter) can be assumed to be the same (QCL for at least one of these). You may.
- the spatial reception parameter may correspond to the received beam of the UE (for example, the received analog beam), or the beam may be specified based on the spatial QCL.
- the QCL (or at least one element of the QCL) in the present disclosure may be read as sQCL (spatial QCL).
- QCL types A plurality of types (QCL types) may be specified 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 the parameters (may be referred to as QCL parameters) are shown below:
- QCL Type A QCL-A
- QCL-B Doppler shift and Doppler spread
- QCL type C QCL-C
- QCL-D Spatial reception parameter.
- the UE may assume that one control resource set (Control Resource Set (CORESET)), channel, or reference signal has a specific QCL (eg, QCL type D) relationship with another CORESET, channel, or reference signal.
- QCL assumption QCL assumption
- the UE may determine at least one of the transmission beam (Tx beam) and the reception beam (Rx beam) of the signal / channel based on the TCI state of the signal / channel or the QCL assumption.
- the TCI state may be, for example, information about the QCL of the target channel (in other words, the reference signal (Reference Signal (RS)) for the channel) and another signal (for example, another RS). ..
- the TCI state may be set (instructed) by higher layer signaling, physical layer signaling, or a combination thereof.
- the upper layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.
- RRC Radio Resource Control
- MAC Medium Access Control
- Broadcast information includes, for example, a master information block (Master Information Block (MIB)), a system information block (System Information Block (SIB)), a minimum system information (Remaining Minimum System Information (RMSI)), and other system information ( Other System Information (OSI)) may be used.
- MIB Master Information Block
- SIB System Information Block
- RMSI Minimum System Information
- OSI Other System Information
- the physical layer signaling may be, for example, downlink control information (DCI).
- DCI downlink control information
- the channels for which the TCI state or spatial relationship is set are, for example, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), and an uplink shared channel (Physical Uplink Shared). It may be at least one of a Channel (PUSCH)) and an uplink control channel (Physical Uplink Control Channel (PUCCH)).
- PDSCH Physical Downlink Shared Channel
- PDCH Downlink Control Channel
- PUSCH Physical Uplink Control Channel
- PUCCH Physical Uplink Control Channel
- the RS having a QCL relationship with the channel is, for example, a synchronization signal block (Synchronization Signal Block (SSB)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a measurement reference signal (Sounding). It may be at least one of Reference Signal (SRS)), CSI-RS for tracking (also referred to as Tracking Reference Signal (TRS)), and reference signal for QCL detection (also referred to as QRS).
- SSB Synchronization Signal Block
- CSI-RS Channel State Information Reference Signal
- Sounding Sounding
- SRS Reference Signal
- TRS Tracking Reference Signal
- QRS reference signal for QCL detection
- the SSB is a signal block including at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)), a secondary synchronization signal (Secondary Synchronization Signal (SSS)), and a broadcast channel (Physical Broadcast Channel (PBCH)).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- PBCH Physical Broadcast Channel
- the SSB may be referred to as an SS / PBCH block.
- the UE may receive setting information (for example, PDSCH-Config, tci-StatesToAddModList) including a list of information elements of the TCI state by upper layer signaling.
- setting information for example, PDSCH-Config, tci-StatesToAddModList
- the TCI state information element (RRC "TCI-state IE") set by the upper layer signaling may include a TCI state ID and one or more QCL information ("QCL-Info").
- the QCL information may include at least one of information related to the RS having a QCL relationship (RS-related information) and information indicating the QCL type (QCL type information).
- RS-related information includes RS index (for example, SSB index, non-zero power CSI-RS (Non-Zero-Power (NZP) CSI-RS) resource ID (Identifier)), cell index where RS is located, and RS position.
- Information such as the index of the Bandwidth Part (BWP) to be used may be included.
- both QCL type A RS and QCL type D RS, or only QCL type A RS can be set for the UE.
- TRS When TRS is set as the RS of QCL type A, it is assumed that the same TRS is periodically transmitted over a long period of time, unlike the PDCCH or PDSCH demodulation reference signal (DeModulation Reference Signal (DMRS)). Will be done.
- DMRS DeModulation Reference Signal
- the UE can measure the TRS and calculate the average delay, delay spread, and so on.
- a UE in which the TRS is set as the QCL type A RS in the TCI state of the PDCCH or PDSCH DMRS has the same parameters (average delay, delay spread, etc.) of the PDCCH or PDSCH DMRS and the TRS QCL type A. Since it can be assumed that there is, the parameters (average delay, delay spread, etc.) of DMRS of PDCCH or PDSCH can be obtained from the measurement result of TRS.
- the UE can perform more accurate channel estimation by using the measurement result of the TRS.
- a UE set with a QCL type D RS can determine a UE reception beam (spatial domain reception filter, UE spatial domain reception filter) using the QCL type D RS.
- a TCI-state QCL type X RS may mean an RS that has a QCL type X relationship with a channel / signal (DMRS), and this RS is called the TCI-state QCL type X QCL source. You may.
- DMRS channel / signal
- TCI state for PDCCH Information about the QCL between the PDCCH (or DMRS antenna port associated with the PDCCH) and an RS may be referred to as the TCI state for the PDCCH or the like.
- the UE may determine the TCI state for the UE-specific PDCCH (CORESET) based on the upper layer signaling. For example, for the UE, one or more (K) TCI states may be set by RRC signaling for each CORESET.
- CORESET UE-specific PDCCH
- the UE may activate one of the plurality of TCI states set by RRC signaling for each CORESET by MAC CE.
- the MAC CE may be called a TCI state indicating MAC CE (TCI State Indication for UE-specific PDCCH MAC CE) for UE-specific PDCCH.
- the UE may monitor the CORESET based on the active TCI state corresponding to the CORESET.
- TCI state for PDSCH Information about the QCL between the PDSCH (or DMRS antenna port associated with the PDSCH) and a DL-RS may be referred to as the TCI state for the PDSCH or the like.
- the UE may notify (set) M (M ⁇ 1) TCI states (QCL information for M PDSCHs) for PDSCH by higher layer signaling.
- the number M of TCI states set in the UE may be limited by at least one of the UE capability and the QCL type.
- the DCI used for scheduling the PDSCH may include a field indicating the TCI state for the PDSCH (for example, it may be called a TCI field, a TCI state field, or the like).
- the DCI may be used for scheduling the PDSCH of one cell, and may be called, for example, DL DCI, DL assignment, DCI format 1_0, DCI format 1-1-1 and the like.
- Whether or not the TCI field is included in the DCI may be controlled by the information notified from the base station to the UE.
- the information may be information indicating whether or not a TCI field exists in DCI (present or present) (for example, TCI field existence information, TCI existence information in DCI, upper layer parameter TCI-PresentInDCI).
- the information may be set in the UE by, for example, higher layer signaling.
- TCI states When more than 8 types of TCI states are set in the UE, 8 or less types of TCI states may be activated (or specified) using MAC CE.
- the MAC CE may be referred to as a UE-specific PDSCH TCI state activation / deactivation MAC CE (TCI States Activation / Deactivation for UE-specific PDSCH MAC CE).
- TCI States Activation / Deactivation for UE-specific PDSCH MAC CE The value of the TCI field in DCI may indicate one of the TCI states activated by MAC CE.
- the UE When the UE sets the TCI field existence information set to "enabled” for the CORESET that schedules the PDSCH (CORESET used for the PDCCH transmission that schedules the PDSCH), the UE is set to the TCI field. , It may be assumed that it exists in the DCI format 1-11 of the PDCCH transmitted on the CORESET.
- the UE Corresponds to the reception of DL DCI (DCI that schedules the PDSCH) and the DCI when the TCI field existence information is not set for the CORESET that schedules the PDSCH or the PDSCH is scheduled in the DCI format 1_0. If the time offset between the reception of the PDSCH is greater than or equal to the threshold, the UE uses the TCI state or QCL assumption for the PDSCH to schedule the PDSCH transmission to determine the QCL of the PDSCH antenna port. It may be assumed that it is the same as the TCI state or QCL assumption applied to the CORESET.
- the TCI field in the DCI in the component carrier (CC) that schedules (PDSCH) will be the activated TCI in the scheduled CC or DL BWP.
- the UE uses a TCI that has a DCI and follows the value of the TCI field in the detected PDCCH to determine the QCL of the PDSCH antenna port. You may.
- the UE performs the PDSCH of the serving cell. It may be assumed that the DM-RS ports are RSs and QCLs in the TCI state with respect to the QCL type parameters given by the indicated TCI state.
- the indicated TCI state may be based on the activated TCI state in the slot with the scheduled PDSCH. If the UE is configured with a multi-slot PDSCH, the indicated TCI state may be based on the activated TCI state in the first slot with the scheduled PDSCH, and the UE may span the slot with the scheduled PDSCH. You may expect them to be the same. If the UE is configured with a CORESET associated with a search space set for cross-carrier scheduling, the UE will set the TCI field presence information to "valid" for that CORESET and in the serving cell scheduled by the search space set. If at least one of the TCI states set relative to it contains a QCL type D, the UE assumes that the time offset between the detected PDCCH and the PDCCH corresponding to that PDCCH is greater than or equal to the threshold. May be good.
- the DL DCI In the RRC connection mode, the DL DCI (PDSCH) is set both when the TCI information in the DCI (upper layer parameter TCI-PresentInDCI) is set to "enabled” and when the TCI information in the DCI is not set. If the time offset between the receipt of the scheduled DCI) and the corresponding PDSCH (the PDSCH scheduled by the DCI) is less than the threshold, the UE will see that the DM-RS port of the PDSCH of the serving cell is in the serving cell.
- One or more CORESETs in the active BWP have the smallest (lowest) CORESET-ID in the latest (latest) slot monitored by the UE and are in the monitored search space.
- the associated CORESET is an RS and a QCL with respect to the QCL parameters used to indicate the QCL of the PDCCH (FIG. 1).
- This RS may be referred to as the PDSCH default TCI state or the PDSCH default QCL assumption.
- the time offset between the reception of the DL DCI and the reception of the PDSCH corresponding to the DCI may be referred to as a scheduling offset.
- the above thresholds are QCL time duration, "timeDurationForQCL”, “Threshold”, “Threshold for offset between a DCI indicating a TCI state and a PDSCH scheduled by the DCI", “Threshold-Sched-Offset”. , Schedule offset threshold, scheduling offset threshold, and the like.
- the QCL time length may be based on the UE capability, for example, the delay required for PDCCH decoding and beam switching.
- the QCL time length may be the minimum time required for the UE to perform PDCCH reception and application of spatial QCL information received in the DCI for PDSCH processing.
- the QCL time length may be represented by the number of symbols for each subcarrier interval, or may be represented by the time (for example, ⁇ s).
- the QCL time length information may be reported from the UE to the base station as UE capability information, or may be set in the UE from the base station using higher layer signaling.
- the UE may assume that the DMRS port of the PDSCH is a DL-RS and QCL based on the TCI state activated for the CORESET corresponding to the minimum CORESET-ID.
- the latest slot may be, for example, a slot that receives the DCI that schedules the PDSCH.
- CORESET-ID may be an ID (ID for identifying CORESET, controlResourceSetId) set by the RRC information element "ControlResourceSet”.
- the default TCI state may be the activated TCI state that is applicable to the PDSCH in the active DL BWP of the CC and has the lowest ID.
- the delay from PDCCH to PDSCH is for QCL. If less than the time length, or if the TCI state is not in the DCI for the scheduling, the UE will from the active TCI state that is applicable to the PDSCH in the active BWP of the scheduled cell and has the lowest ID. QCL assumptions for the scheduled PDSCH of may be acquired.
- the traffic type may be identified at the physical layer based on at least one of the following: -Logical channels with different priorities-Modulation and Coding Scheme (MCS) table (MCS index table) -Channel Quality Indication (CQI) table-DCI format-Used for scramble (mask) of Cyclic Redundancy Check (CRC) bits included (added) in the DCI (DCI format).
- Radio Network Temporary Identifier eg System Information (SI) -RNTI -RRC (Radio Resource Control) parameters-Specific RNTI (for example, RNTI for URLLC, MCS-C-RNTI, etc.) -Search space-Fields in DCI (for example, newly added fields or reuse of existing fields)
- SI System Information
- RRC Radio Resource Control
- the traffic type may be associated with communication requirements (requirements such as delay and error rate, requirement conditions), data type (voice, data, etc.) and the like.
- the difference between the URLLC requirement and the eMBB requirement may be that the URLLC latency is smaller than the eMBB delay, or that the URLLC requirement includes a reliability requirement.
- Multi TRP In NR, it is considered that one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi-TRP) perform DL transmission to the UE using one or more panels (multi-panel). Has been done. It is also being considered that the UE transmits UL to one or more TRPs.
- TRP Transmission / Reception Point
- FIG. 2 shows an example in which a UE repeatedly performs DL reception using four reception opportunities for four TRPs.
- the reception opportunity may be a unit of repeated reception. At least one of Time Division Multiplexing (TDM), Frequency Division Multiplexing (FDM), Space Division Multiplexing (SDM), etc. is applied to multiple reception opportunities. May be good.
- TDM Time Division Multiplexing
- FDM Frequency Division Multiplexing
- SDM Space Division Multiplexing
- the reception opportunity may be read as a reception occasion, an Rx occasion, and the like.
- the plurality of TRPs may correspond to the same cell identifier (cell Identifier (ID)) or may correspond to different cell IDs.
- the cell ID may be a physical cell ID or a virtual cell ID.
- FIG. 3A-3D is a diagram showing an example of a multi-TRP scenario. In these examples, it is assumed that each TRP is capable of transmitting four different beams, but is not limited to this.
- FIG. 3A shows an example of a case (which may be called single mode, single TRP, etc.) in which only one TRP (TRP1 in this example) of the multi-TRPs transmits to the UE.
- the TRP1 transmits both a control signal (PDCCH) and a data signal (PDSCH) to the UE.
- PDCH control signal
- PDSCH data signal
- FIG. 3B shows a case where only one TRP (TRP1 in this example) of the multi-TRP transmits a control signal to the UE, and the multi-TRP transmits a data signal (may be called a single master mode).
- TRP1 TRP1 in this example
- DCI Downlink Control Information
- FIG. 3C shows an example of a case (which may be called a master-slave mode) in which each of the multi-TRPs transmits a part of a control signal to the UE and the multi-TRP transmits a data signal.
- Part 1 of the control signal (DCI) may be transmitted in TRP1
- part 2 of the control signal (DCI) may be transmitted in TRP2.
- Part 2 of the control signal may depend on Part 1.
- the UE receives each PDSCH transmitted from the multi-TRP based on these DCI parts.
- FIG. 3D shows an example of a case (which may be called a multi-master mode) in which each of the multi-TRPs transmits a separate control signal to the UE and the multi-TRP transmits a data signal.
- the first control signal (DCI) may be transmitted in TRP1
- the second control signal (DCI) may be transmitted in TRP2.
- the UE receives each PDSCH transmitted from the multi-TRP based on these DCIs.
- the DCI is a single DCI (S-DCI, single). It may be called PDCCH).
- S-DCI single DCI
- PDCCH PDCCH
- M-DCI multiple PDCCH (multiple PDCCH)
- Non-Coherent Joint Transmission is being studied as a form of multi-TRP transmission.
- TRP1 modulates and maps the first codeword, layer-maps it, and transmits the first PDSCH to the first number of layers (for example, two layers) using the first precoding.
- TRP2 modulates and maps the second codeword, layer-maps the second codeword, and transmits the second PDSCH to the second number of layers (for example, the second layer) by using the second precoding.
- the plurality of PDSCHs (multi-PDSCHs) to be NCJT may be defined as partially or completely overlapping with respect to at least one of the time and frequency domains. That is, at least one of the time and frequency resources of the first PDSCH from the first TRP and the second PDSCH from the second TRP may overlap.
- first PDSCH and second PDSCH may be assumed to be not quasi-co-located in a pseudo-collocation (Quasi-Co-Location (QCL)) relationship.
- the reception of the multi-PDSCH may be read as the simultaneous reception of PDSCHs that are not of a certain QCL type (for example, QCL type D).
- Scheme 1a space division multiplexing
- FDM scheme Frequency division multiplexing
- Scheme 2a FDM scheme A
- 2b FDM scheme B
- TDM Time division multiplexing
- At least one of these schemes may be supported for URLLC.
- repetitions # 1 and # 2 of codeword (CW) # 1 are transmitted from TRP # 1 and TRP # 2, respectively.
- Each reception opportunity may be one layer or one set (layer set) of layers of the same transport block (TB).
- Each layer or layer set may be associated with one TCI state and one set of DMRS ports.
- a single codeword with one redundant version (RV) may be used across all spatial layers or layer sets. Seen from the UE, the different coding bits are Rel. It is mapped to a different layer or a different set of layers using the same mapping rules as in 15.
- repetitions # 1 and # 2 of FIG. 4 are mapped to layers # 1 and # 2 in resources having times and frequencies that overlap each other, as shown in FIG.
- the UE repeatedly receives # 1 using the TCI states # 1 and RV # 0, and repeatedly receives # 2 using the TCI states # 2 and RV # 0.
- repetitions # 1 and # 2 different TCI states and the same RV are used.
- a single codeword with one RV may be used across resource allocations.
- common resource block (RB) mappings codeword-to-layer mappings similar to Rel.15 may be applied across resource allocations.
- a single codeword with one RV may be used for each non-overlapping frequency resource allocation.
- the RVs corresponding to each non-overlapping frequency resource allocation may be the same or different.
- the frequency resource arrangement may be a comb-like frequency resource arrangement among the multi-TRPs.
- PRG wideband precoding resource block group
- the first ceil (N RB / 2) RBs are assigned to TCI state 1 and the remaining floor (N RB / 2) RBs are in TCI state 2. May be assigned.
- PRG size 2 or 4
- even index PRGs in the allocated frequency domain resource allocation (FDRA) are assigned to TCI state 1 and odd index PRGs in the allocated FDRA are It may be assigned to TCI state 2.
- the precoder particle size P may be one of the values of ⁇ 2, 4, wide band ⁇ . If P is 2 or 4, the PRG divides the BWP into P consecutive PRBs.
- the non-overlapping frequency resource allocation # 1 is the continuous PRB in the first half of the BWP, and the non-overlapping frequency resource allocation.
- # 2 is a continuous PRB in the latter half of the BWP.
- the precoder particle size is 2 or 4 (PRG size is 2 or 4)
- the non-overlapping frequency resource allocation # 1 is an even index PRG and the non-overlapping frequency.
- Resource allocation # 2 is an odd index PRG.
- Each reception opportunity of the TB may have one TCI state and one RV, using the granularity of the minislot. All reception opportunities in the slot may use a common MCS with the same single or multiple DMRS ports. At least one of the RV and TCI states may be the same or different during multiple reception opportunities.
- the repetitions # 1 and # 2 in FIG. 4 are mapped to reception opportunities # 1 and # 2 in one slot, respectively, as shown in FIG. 8A.
- the UE repeatedly receives # 1 using the TCI states # 1 and RV # 0, and repeatedly receives # 2 using the TCI states # 2 and RV # 3. Different TCI states and different RVs are used for repetitions # 1 and # 2.
- Each reception opportunity of the TB may have one TCI state and one RV. All reception opportunities across K slots may use a common MCS with the same single or multiple DMRS ports. At least one of the RV and TCI states may be the same or different during multiple reception opportunities.
- the repetitions # 1 and # 2 of FIG. 4 are mapped to the reception opportunity # 1 in the first slot and the reception opportunity # 2 in the second slot, respectively, as shown in FIG. 8B.
- the UE repeatedly receives # 1 using the TCI states # 1 and RV # 0, and repeatedly receives # 2 using the TCI states # 2 and RV # 3. Different TCI states and different RVs are used for repetitions # 1 and # 2.
- NCJT using multi-TRP / panel may use high rank. Both single DCI (single PDCCH) and multi-DCI (multi-PDCCH) are supported to support ideal and non-ideal backhaul between multiple TRPs. May be good. The maximum number of TRPs may be 2 for both single DCI and multi DCI.
- TCI Expansion of TCI is being considered for single PDCCH design (mainly for ideal backhaul).
- Each TCI code point in the DCI may correspond to one or two TCI states.
- the TCI field size is Rel. It may be the same as that of 15.
- the UE may support the following combinations of layers from the two TRPs indicated by the antenna port field.
- CW code word
- SU single user
- the combination of the number of layers of TRP1 and TRP2 is shown in the format of "the number of layers of TRP1 + the number of layers of TRP2", whichever is 1 + 1, 1 + 2, 2 + 1, 2 + 2. It may be.
- the size of the antenna port field is Rel. It may be the same as 15.
- the maximum number of CORESETs for each PDCCH setting information may be increased to 5 according to the UE capability.
- the maximum number of CORESETs that can be configured with the same TRP may be up to the number reported by the UE capability.
- the same TRP may be the same upper layer index (for example, CORESET pool index) set for each PDCCH setting information and, if set, for each CORESET.
- the UE capability may include at least 3 candidate values.
- the maximum number of at least one BD and CCE resource per serving cell, per slot may be increased, depending on the UE capability. ..
- Extension of PDSCH is being considered only for multi-PDCCH-based design.
- the total number of CWs in the scheduled multiple PDSCHs may be up to 2.
- Each PDSCH is scheduled by one PDCCH.
- the total number of scheduled PDSCH multi-input multi-output (MIMO) layers may be up to the number reported by the MIMO capability of the UE. Rel. It has not been agreed to increase the maximum number of HARQ processes in 16.
- the UE may support different PDSCH scrambling sequences for multiple PDSCHs.
- the UE may support extending the RRC configuration to configure multiple dataScramblingIdentityPDSCHs.
- Each dataScramblingIdentityPDSCH may be associated with a higher layer index (CORESET pool index) for each CORESET and applied to a PDSCH scheduled with a DCI detected on the CORESET having the same higher layer index.
- UEs are at least fully overlapped, partially overlapped, and non-overlapped in the time and frequency domains. Multiple PDSCHs, which are one, may be supported.
- CRS pattern information for setting a plurality of CRS patterns in a serving cell may be extended to LTE cell-specific RS (cell-specific reference signal (CRS)).
- the CRS pattern information is a parameter for determining the CRS pattern, and the UE may rate match around the CRS pattern.
- Both joint ACK / NACK (HARQ-ACK) feedback and separate ACK / NACK feedback may be supported.
- RRC signaling may be used to switch between joint feedback and separate feedback.
- Both semi-static HARQ-ACK codebooks and dynamic HARQ-ACK codebooks may be supported for joint ACK / NACK feedback.
- a higher layer index for each CORESET used to generate a separate HARQ-ACK codebook may be set, or a semi-static HARQ-ACK codebook and a dynamic HARQ-ACK codebook may be set. Both may be supported, two TDM long PUCCCHs in one slot may be supported, TDM short PUCCHs and long PUCCHs in one slot may be supported, and 1 Two TDM short PUCCCHs in the slot may be supported.
- the UE After receiving the PDSCH, if the time offset between the reception of the PDCCH and the corresponding PDSCH is less than the threshold (timeDurationForQCL), the UE will indicate that the DMRS port of the PDSCH is indicated by the next default TCI state. It may be assumed that the QCL parameters are followed.
- the UE may use the TCI state corresponding to the lowest code point of the TCI code points containing the two different TCI states activated for PDSCH as the default TCI state. If all TCI code points are mapped to a single TCI state, the default TCI state is Rel. You may follow the operation of 15. Using the default TCI state for multiple PDSCHs based on a single DCI may be part of the UE capability.
- the UE will see that the DMRS port of the PDSCH has a TCI within that PDCCH. It may be assumed that one or two TCI states corresponding to the TCI code points indicated by the field are followed.
- the UE For multi-DCI-based multi-TRP / panel transmissions, if the CORESETPoolIndex is set and the time offset between PDCCH reception and the corresponding PDSCH is less than the threshold, the UE The PDSCH DM-RS port has the same value of the CORESET pool index in each latest slot in which one or more CORESETs associated with each of the CORESET pool indexes in the active BWP of the serving cell are monitored by the UE. It may be assumed that the RS and QCL are related to the QCL parameters used for the PDCCH of the lowest CORESET index in the set CORESET. Support for this feature may be indicated (reported) by the UE capability. If the UE does not support this feature, Rel. Fifteen operations may be reused.
- FIGS. 9A and 9B are diagrams showing an example of the default QCL of the multi-PDSCH based on the single DCI.
- the examples shown in FIGS. 9A and 9B correspond to the single PDCCH example shown in FIG. 3B.
- the UE receives DCI1 and PDSCH1 transmitted from panel 1 (or TRP1 or CORESET pool 1).
- the UE also receives PDSCH2 transmitted from panel 2 (or TRP2 or CORESET pool 2).
- DCI1 schedules the reception of PDSCH1 and PDSCH2.
- the scheduling offset 1 from the reception of the DCI1 to the PDSCH1 is smaller than the scheduling offset threshold.
- the scheduling offset 2 from the reception of the DCI1 to the PDSCH2 is smaller than the scheduling offset threshold value.
- FIG. 9B shows an example of the correspondence between the TCI code point and the TCI state of the TCI field of DCI1 assumed in the example of FIG. 9A.
- the lowest code point among the TCI code points containing two different TCI states activated for PDSCH is "001".
- the UE may use the TCI state (TCI state ID) of T0 and T1 corresponding to the TCI code point “001” as the default QCL of PDSCH1 and PDSCH2.
- RS QCL is related to the TCI state-related QCL parameter corresponding to the lowest code point among the TCI code points including the state.
- the UE has the DMRS port of the PDSCH.
- the threshold value timeDurationForQCL
- it is the QCL of RS in the TCI state regarding the QCL type parameter given by the indicated TCI state (indicated TCI State) in the DL DCI.
- the threshold value may be limited based on the UE capability information report.
- the indicated TCI state may be based on the active TCI state in the scheduled PDSCH slot.
- the indicated TCI state may be based on the active TCI state in the first slot of the scheduled PDSCH, and the UE may use the schedule. It may be expected that the same active TCI state will be applied across the slots of the PDSCH to be made.
- the present inventors have conceived a method for appropriately determining the TCI state for a plurality of PDSCH reception opportunities using multi-TRP.
- a panel an Uplink (UL) transmitting entity, a TRP, a spatial relationship, a control resource set (COntrol REsource SET (CORESET)), a PDSCH, a code word, a base station, and an antenna port of a certain signal (for example, a reference signal for demodulation).
- a certain signal for example, a reference signal for demodulation.
- DMRS DeModulation Reference Signal
- antenna port group of a certain signal for example, DMRS port group
- group for multiplexing for example, Code Division Multiplexing (CDM)) group, reference signal group,
- the CORESET group the CORESET pool, the CW, the redundant version (redundancy version (RV)), and the layers (MIMO layer, transmission layer, spatial layer
- the panel Identifier (ID) and the panel may be read as each other.
- TRP ID and TRP may be read as each other.
- NCJT, NCJT using multi-TRP, multi-PDSCH using NCJT, multi-PDSCH, a plurality of PDSCHs from multi-TRP, and the like may be read as each other.
- the multi-PDSCH may mean a plurality of PDSCHs multiplexed by at least one of SDM, FDM, and TDM, may mean a plurality of PDSCHs carrying the same TB or the same CW, and may mean different UE reception beams. It may mean a plurality of PDSCHs to which (spatial domain reception filter, QCL parameter, TCI state) are applied.
- the default TCI state may be read as the default QCL, the default QCL assumption, the default spatial relationship, the default unified TCI state, and the like.
- this TCI state or QCL (QCL assumption) is referred to as a default TCI state, but the name is not limited to this.
- the definition of the default TCI state is not limited to this.
- the default TCI state may be, for example, a TCI state assumed when the TCI state / QCL specified by the DCI is not available for a certain channel / signal (for example, PDSCH), or the TCI state / QCL is specified (for example). Alternatively, it may be in the TCI state assumed when it is not set).
- the cell, CC, carrier, BWP, and band may be read as each other.
- index, ID, indicator, and resource ID may be read as each other.
- the QCL parameters followed by the port, the TCI state or QCL-assumed QCL type D RS, and the TCI state or QCL-assumed QCL type A RS may be read interchangeably.
- the QCL type D RS, the DL-RS associated with the QCL type D, the DL-RS having the QCL type D, the DL-RS source, the SSB, and the CSI-RS may be read interchangeably.
- the TCI state is information about a receive beam (spatial domain receive filter) instructed (set) to the UE (for example, DL-RS, QCL type, cell to which DL-RS is transmitted, etc.).
- a QCL assumption is based on the transmission or reception of an associated signal (eg, PRACH) and is transmitted by an information (eg, DL-RS, QCL type, DL-RS) about a receive beam (spatial domain receive filter) assumed by the UE. It may be a cell to be used, etc.).
- the latest slot, the most recent slot, the latest search space, and the latest search space may be read as each other.
- the UE may satisfy at least one of the following conditions 1-5 (in other words, the UE if at least one of the following conditions 1-5 is met: May operate based on at least one of the following embodiments): [Condition 1] When the scheduling offset of DCI for PDSCH is less than a certain threshold (for example, timeDurationForQCL), [Condition 2] When TCI field existence information (tci-PresentInDCI) is not set for the UE [Condition 3] When multi-TRP for URLLC is set [Condition 4] Rel.
- a certain threshold for example, timeDurationForQCL
- TCI field existence information tci-PresentInDCI
- a specific upper layer parameter (for example, PDSCH-Config) may be set for the UE.
- the particular upper layer parameter (eg, PDSCH-Config) may be an entry in the pdsch-TimeDomainAllocationList containing RepNumR16 in at least one PDSCH-TimeDomainResourceAllocation element [Condition 3-1].
- the other DCI field (eg, "time domain resource allocation") may be at least one entry in the PDSCH-TimeDomainResourceAllocation element of the pdsch-TimeDomainAllocationList containing RepNumR16 [Condition 3-2].
- the above conditions 3-1 and 3-2 may be applied to the UE alone or in combination.
- the UE is Rel. Transmission and reception may be controlled by using the scheme of the default TCI state in 16.
- the case where the number of PDSCH reception opportunities (PDSCH repetition) is 4 or 2 will be described as an example, but the number of PDSCH reception opportunities (PDSCH repetition) is not limited to this. Further, the order of applying the TCI state to the PDSCH reception opportunity is not limited to the example shown in the figure.
- the UE may apply a plurality of TCI states cyclically to the PDSCH reception opportunity (the method is a first method, a cyclic manner). May be called). For example, when R TCI states are set, the 1st to Rth TCI states may be applied to the reception opportunities of the 1st to Rth PDSCHs, respectively. If the number of TCI states (R) is less than the number of reception opportunities, the same TCI states (again 1 to R) may be cyclically applied to the remaining PDSCH reception opportunities.
- the UE may sequentially apply a plurality of TCI states to the PDSCH reception opportunity (the method is a second method, a sequential manner). May be called).
- the R + 1] th (rK / R) th PDSCH reception opportunity may be applied, and the Rth TCI state may be applied to the [(R-1) K / R + 1] th to Kth PDSCH reception opportunity. ..
- Embodiment 1.1 The number of TCI states per DCI code point in DCI format (eg DCI format 1-11) is described in Rel. It may be common with the number of TCI states applicable at 16. In other words, the UE can determine the number of TCI states per DCI code point in DCI format (eg DCI format 1-11) by Rel. A number of TCI states common to the number of TCI states applicable in 16 may be set to control transmission and reception.
- the number of bits of the DCI field related to the TCI state may be 3 bits. Also, one or two TCI states may correspond to one DCI code point. Also, up to eight TCI states may be activated.
- the UE may generate (determine) another set of TCI states to be applied to the PDSCH reception opportunity from other DCI code points different from the default TCI state and the TCI state indicated by the network. good.
- the other DCI code points may be the m-th (m is an integer of 2 or more) small (low) and two active TCI state DCI code points. Further, the other DCI code points may be the m-th smallest DCI code point in one active TCI state and the m + 1st smallest DCI code point in one active TCI state.
- the maximum number of default TCI states corresponding to one DCI code point may be notified to the UE by upper layer signaling (for example, RRC signaling), or is determined based on the UE capability information. It may be determined based on the number of actual PDSCH reception opportunities (PDSCH repetitions).
- RRC signaling for example, RRC signaling
- FIG. 10 is a diagram showing an example of the TCI state applied to the PDSCH reception opportunity.
- the DCI code point is 3 bits, and a maximum of two active TCI states are set for each DCI code point.
- TCI # 0 and TCI # 1 which correspond to DCI code point 000, are TCI states set as default TCI states or instructed by the NW.
- the UE may determine TCI # 2 and TCI # 3 corresponding to DCI code point 001 as the TCI state to be applied to the PDSCH reception opportunity.
- the UE applies the TCI state # 0- # 3 to the PDSCH reception opportunity and controls the PDSCH reception.
- the communication control can be simplified and the overhead in the DCI reception of the UE can be suppressed.
- Embodiment 1.2 The number of TCI states per DCI code point in DCI format (eg DCI format 1-1) is described in Rel. It may be greater than or equal to the number of TCI states applicable at 16. In other words, the UE can determine the number of TCI states per DCI code point in DCI format (eg DCI format 1-11) by Rel. A number of TCI states common to the number of TCI states applicable in 16 may be set to control transmission and reception.
- the number of bits of the DCI field related to the TCI state may be 3 bits or more. Further, two or more TCI states may correspond to one DCI code point. Also, up to eight or more TCI states may be activated.
- the UE may apply the two TCI states to the PDSCH reception opportunity.
- the "default TCI state set for the UE" in the present disclosure may be read as the default TCI state determined by the UE based on the TCI state set / activated by RRC / MAC.
- FIG. 11 is a diagram showing an example of the TCI state applied to the PDSCH reception opportunity.
- TCI # 0 and TCI # 1 which correspond to DCI code point 000, are TCI states set as default TCI states or instructed by the NW.
- the UE applies the TCI states # 0 and # 1 to the PDSCH reception opportunity and controls the PDSCH reception.
- the UE applies the two or more TCI states to the PDSCH reception opportunity. You may.
- FIG. 12 is a diagram showing an example of the TCI state applied to the PDSCH reception opportunity.
- TCI # 0- # 3 which corresponds to DCI code point 000, is the TCI state set as the default TCI state or instructed by the NW.
- the UE applies the TCI states # 0 to # 3 to the PDSCH reception opportunity and controls the PDSCH reception.
- the UE will perform the set default TCI states (or TCI states). , NW-instructed TCI status), select the TCI status index as many as the number of PDSCH reception opportunities in ascending order (or descending order), and set the TCI status corresponding to the TCI status index to the PDSCH reception opportunity. May be applied.
- FIG. 13 is a diagram showing an example of the TCI state applied to the PDSCH reception opportunity.
- TCI # 0- # 3 which corresponds to DCI code point 000, is the TCI state set as the default TCI state or instructed by the NW.
- the UE applies the TCI states # 0 and # 1 of the TCI states # 0 to # 3 to the PDSCH reception opportunities to control the PDSCH reception.
- the UE is TCI less than or equal to the number of PDSCH reception opportunities. It may be assumed that the TCI state corresponding to the DCI code point having the number of states is set as the default TCI state (or the TCI state indicated by the NW). The UE may then apply the default TCI state (or TCI state indicated by the NW) to the PDSCH reception opportunity.
- the UE determines the number of PDSCH reception opportunities. It may be assumed that the TCI state corresponding to the DCI code point having the same number of TCI states is set as the default TCI state (or the TCI state indicated by the NW). The UE may then apply the default TCI state (or TCI state indicated by the NW) to the PDSCH reception opportunity.
- FIG. 14 is a diagram showing an example of the TCI state applied to the PDSCH reception opportunity.
- TCI # 4 and # 5 are set as the default TCI state.
- the UE applies TCI states # 4 and # 5 to the PDSCH reception opportunity to control the PDSCH reception.
- the default TCI state set for the UE can be appropriately applied to the PDSCH reception opportunity, and more flexible PDSCH reception control becomes possible.
- a second embodiment relates to a default TCI state (QCL) for each reception opportunity of repeated reception.
- 15A and 15B are diagrams showing an example of the default TCI state of repeated reception. 15A and 15B correspond to four repeated DL receptions.
- different hatches may mean different TCI states (beams) with respect to TRP, repeated reception / transmission, and the like.
- Rel. New RRC parameters may be introduced to switch and operate with the default TCI state mechanism at 16.
- the TCI state may or may not be explicitly notified to the UE by higher layer signaling (eg, RRC signaling / MAC CE). Further, the QCL assumption may or may not be explicitly set in the UE. The UE may also assume that the PDSCH is an SSB and a QCL identified by the most recent PRACH transmission.
- higher layer signaling eg, RRC signaling / MAC CE.
- the default TCI state may be the same (or common) for each reception opportunity (Embodiment 2.1). In this case, for example, since the same QCL can be applied to the DMRS over a plurality of slots, better channel estimation accuracy in the UE can be ensured.
- FIG. 15A shows an example in which the UE repeatedly receives each reception opportunity according to the same TCI state # 0.
- the UE may assume that the same one default TCI state is selected by one of the following: ⁇ Rel. Same rule as 15 (Embodiment 2.1.1), -Scheduling DCI TCI status / QCL (Embodiment 2.1.2).
- the default TCI state can be determined as in the conventional rule, so that the UE can be easily implemented.
- the default TCI state may be the TCI state corresponding to the TCI state of CORESET in which the scheduling DCI is detected.
- PDSCH reception can be performed based on the beam that has been successfully received, so that DL reception can be expected to be successful.
- the default TCI state may be different for each reception opportunity (Embodiment 2.2). In this case, for example, by using multi-TRP, better robustness (spatial diversity) for suppressing blockage can be ensured.
- FIG. 15B shows an example in which UEs repeatedly receive the first to fourth reception opportunities according to different TCI states # 0 to # 3, respectively. In this case, the TCI state for each reception opportunity may be applied by each method described in the first embodiment.
- the UE may assume that multiple default TCIs for multiple receive opportunities are derived by one of the following: TCI status ID / QCL ID of each CORESET (Embodiment 2.2.1), -Order of TCI status ID / QCL ID instructed by RRC / MAC CE (which may be read as setting, activation, etc.) (Embodiment 2.2.2), • At least one reception opportunity is a predetermined TCI state / QCL, and the remaining reception opportunities are a set / activated TCI state / QCL (Embodiment 2.2.3). The order of beam IDs specified by RRC / MAC CE (Embodiment 2.2.4), The order of CORESET determined in advance or indicated by RRC / MAC CE (Embodiment 2.2.5).
- the plurality of default TCI states may include TCI states corresponding to all the set CORESETs.
- UEs set to CORESET # 0- # 2 have a TCI state of CORESET # 0, a TCI state of CORESET # 1, and a TCI state of CORESET # 2, respectively, at the first to fourth reception opportunities in FIG. 15B.
- CORESET # 0 may be received according to the TCI state.
- the UE can determine the default TCI state for the multi-TRP even if there is no additional / specific signaling as compared with 15, it is possible to suppress an increase in the amount of communication required for the notification of the default TCI state.
- the plurality of default TCI states may correspond to the ordering of predetermined TCI state IDs that have been set / activated.
- the order is specified by a list containing a plurality of sets of an index (which may be called an ordering index) indicating which CI state corresponds to the reception opportunity and a TCI state ID corresponding to the index. May be good.
- the index may be implicitly included in the list. Also, the index may start from 0.
- the order of the TCI state IDs may be referred to as a list / set / group / sequence of the TCI state IDs (or TCI states).
- FIG. 16 is a diagram showing an example of the order of TCI state IDs according to the second embodiment.
- the TCI state IDs # 0- # 3 are associated with each of the indexes 1-4.
- the UE may receive according to the TCI state IDs # 0- # 3, respectively, at the first to fourth reception opportunities of FIG. 15B.
- the UE can easily determine the default TCI state for the multi-TRP.
- the UE determines the default TCI state of at least one reception opportunity among the plurality of default TCI states, for example, one default TCI state shown in the second embodiment (embodiment). The judgment may be made based on 2.1.1-2.1.3). The UE may also determine the default TCI state of the remaining receive opportunities based on, for example, the determination of the plurality of default TCI states shown in Embodiment 2.2.1 or 2.2.2.
- the at least one reception opportunity in which the determination of the default TCI state shown in the second embodiment is used may be the first (that is, the first) reception opportunity of the repetition, or other specific reception opportunities. It may be the (eg, last) reception opportunity.
- 17A and 17B are diagrams showing an example of the default TCI state according to the second embodiment. In this example, it is assumed that the number of repeated receptions is 4.
- the default TCI state of the first reception opportunity is determined based on the first embodiment 2.1.1, and the default TCI state of the second-4 reception opportunity is determined based on the second embodiment 2.2.2. An example of doing so is shown.
- the default TCI state of the first reception opportunity is a predetermined TCI state (for example, the minimum CORESET ID).
- the default TCI state of the first reception opportunity is determined based on the second embodiment 2.1.2, and the default TCI state of the second-4 reception opportunity is determined based on the second embodiment 2.2.2. An example of doing so is shown.
- the default TCI state of the first reception opportunity is the TCI state implicitly notified by the TCI state of the recurring reception scheduling DCI (eg DCI format 1-11).
- the default TCI state of the first slot of the repeated reception of the multi-slot has the same behavior as the default TCI state of the single slot (no repetition), which complicates the control of the UE. Can be suppressed.
- the plurality of default TCI states may correspond to the ordering of predetermined beam IDs that have been set / activated.
- the order may be specified by a list containing a plurality of sets of an index indicating the number of beams (which may be called an ordering index) and a beam ID corresponding to the index.
- the index may be implicitly included in the list. Also, the index may start from 0.
- the order of the beam IDs may be referred to as a list / set / group / sequence of beam IDs (or beams).
- the default TCI state of the first reception opportunity of repeated reception may be the beam ID corresponding to the start position (start index) or the beam ID corresponding to the start ID.
- the default TCI state of the i-th reception opportunity of repeated reception may be a beam ID corresponding to an index of mod ( ⁇ start index + i-2 ⁇ , number of repeated receptions) + 1, or mod ( ⁇ (start ID and).
- the beam ID may be the index corresponding to the index of the set) + i-2 ⁇ and the number of times of repeated reception) +1.
- mod (X, Y) means the remainder (modulo operation) obtained by dividing X by Y.
- the UE may determine the start ID or start position based on, for example, at least one of the following: -Scheduling DCI TCI status, -Default TCI status / Default QCL assumption, -Explicit instructions by RRC / MAC / DCI (eg notification of information about start ID), -TCI status of the set / activated PL-RS, -Reception start time position (eg, start slot, start subslot, start frame, start subframe, start symbol).
- the UE sets the start ID as a specific beam ID (for example, the minimum beam ID, which will be described later in FIG. 18A) in the setting / activation / predetermined beam order.
- the beam ID is # 1).
- the UE sets the start position (start index) as a specific index (for example, the minimum index. FIG. 18A described later) regarding the setting / activation / predetermined beam order. In this case, it may be assumed that the ordering index is 1).
- FIG. 18A and 18B are diagrams showing an example of the order of beam IDs according to the second embodiment.
- beam IDs # 1 to # 4 are associated with indexes 1-4, respectively. If, for example, the UE determines that the start ID is the beam ID # 1, the UE may receive the beam IDs # 1 to # 4 at the first to fourth reception opportunities in FIG. 15B, respectively.
- FIG. 18B is a diagram showing the transition of the order of the beam IDs of FIG. 18A. That is, if the index of a certain reception opportunity is 4, the index of the next reception opportunity is 1.
- the UE can easily determine the default TCI state for the multi-TRP.
- the UE can flexibly control the use of the best beam for the first reception opportunity.
- the content in which the beam order of the above-described embodiment 2.2.4 is read in the order of CORESET (or CORESET ID) may be used.
- the start ID (start position) of CORESET may be determined based on the same parameters as in the description of the start ID of the second embodiment 2.2.4.
- the network may set one of the three best TCI states for each CORESET.
- the UE can determine the TCI status to be applied according to the above three best TCI statuses.
- FIG. 19 is a diagram showing an example of the order of CORESET according to the second embodiment.
- the order of CORESET is predetermined to be the order of CORESET # 0, # 1, and # 2. If the default TCI state of one reception opportunity follows the TCI of CORESET # 2, the default TCI state of the next reception opportunity may follow the TCI state of CORESET # 0.
- the UE can easily determine the default TCI state for the multi-TRP. If the CORESET order is predetermined, no additional signaling regarding the CORESET order is required.
- the IDs corresponding to the default TCI states (CORESET ID, TCI state ID, spatial relationship ID, beam ID)
- the first N (N is the number of repetitions) IDs from the larger (or smaller) one may be applied to each repetition reception opportunity.
- the number of CORESETs for example, 3
- the number of repetitions for example, 2
- the TCI states of the two CORESET IDs (for example, CORESET # 0, # 1) are Each may be applied to the first and second reception opportunities.
- the IDs corresponding to the default TCI states are applied to each recurring reception opportunity based on at least one of a first method (eg, a cyclic manner) and a second method (eg, a sequential manner). May be good.
- the TCI states of the two CORESET IDs (for example, CORESET # 0, # 1) are Each may be applied to the first to fourth reception opportunities. Twice
- the TCI of CORESET # 0, the TCI of CORESET # 1, the TCI of CORESET # 0, and the TCI of CORESET # 1, respectively. It may be used.
- the sequential method for example, at the first, second, third, and fourth reception opportunities, the TCI of CORESET # 0, the TCI of CORESET # 0, the TCI of CORESET # 1, and the TCI of CORESET # 1, respectively. It may be used.
- the UE can appropriately determine the default TCI state for repeated reception.
- the third embodiment describes a case in which whether or not the second embodiment or the other embodiment is applied is based on the UE capability.
- At least one of the following UE capabilities is reported, then at least one of the second and other embodiments may be applied: -Whether or not different TCI / QCL can be applied for each reception opportunity -Whether or not different TCI states are applicable for the default TCI state / QCL of each reception opportunity. -Number of TCI states / QCLs supported, ⁇ Number of CORESETs supported, -Number of beam switches (number of beam switches) during all reception opportunities for repeating the same data.
- At least one of the second embodiment and other embodiments may be applied when the number is equal to or more than a predetermined value (or less than or equal to).
- the UE determines the above N TCI states from the TCI states of each reception opportunity (slot, subslot, etc.) of the repeated PDSCH based on the measurement result of the beam report (for example, L1-SINR / L1-RSRP) (for example, L1-SINR / L1-RSRP). You may choose).
- the measurement result of the beam report for example, L1-SINR / L1-RSRP
- L1-SINR / L1-RSRP for example, L1-SINR / L1-RSRP
- the N TCI states applied to repetitive reception may correspond to the best N beams measured by the UE.
- the UE may measure the received reference signal using a large number of beams and report to the network a beam report for the beam having the highest measurement result, such as L1-SINR / L1-RSRP. Based on this report (eg, the latest reported TCI state (beam)), the base station should include the best N TCI states for receiving PDSCH scheduled for the UE. , You may instruct the UE.
- N is assumed to be at most 2 or 4 (because it is unlikely that all 2 or 4 beams will block at the same time).
- the above N may be predetermined by specifications, may be set in the UE by upper layer signaling / MAC signaling, or may have the same value as the number of reported beams included in the beam report.
- the UE can appropriately determine the default TCI state for repeated reception.
- Each of the above-described embodiments may be used independently for each channel / signal, or may be commonly used for a plurality of channels / signals.
- the default TCI state of PDSCH may be determined by different methods or by a common method.
- the upper layer signaling used in the present disclosure may be set independently for each channel / signal, or may be collectively set as one parameter for a plurality of channels / signals. May be set in (in this case, the one parameter applies to the plurality of channels / signals).
- higher layer signaling for PDSCH may be configured using at least one of the following: -Parameters included in PDSCH setting information (PDSCH-Config information element), -PUSCH TCI state related parameters, -Parameters related to PDSCH resource notification (PDSCH resource, time domain resource allocation list (PDSCH-TimeDomainResourceAllocationList information element), upper layer parameters, or fields for notifying the number of PUSCH repetitions specified by DCI (for example, PDSCH repetition number field, etc.) Part of (may be called), part of the frequency domain resource allocation field indicated by the upper layer parameter or DCI), -Parameters related to PUCCH resource notification (PUCCH resource (PUCCH-Resource information element), PUCCH resource set (PUCCH-ResourceSet information element), upper layer parameter, or field for notifying the number of PUCCH repetitions specified by DCI (for example, PUCCH).
- PDSCH-Config information element PDSCH setting information
- the upper layer signaling for a plurality of channels / signals may be set for each UL BWP (for example, included in the BWP-Uplink information element), or for each DL BWP (for example, the BWP-Downlink information element). It may be set (included in) or per cell (eg, included in the ServingCellConfig information element). Further, the upper layer signaling for a plurality of channels / signals may be set independently for the UL channel / signal and the DL channel / signal, or may be set in common.
- Implicit notifications using this DCI include the (detected) DCI (or corresponding to or used to receive the DCI), time resources, frequency resources, Control Channel Element (CCE) index, and physical. Even if it contains at least one of a resource block (Physical Resource Block (PRB)) index, a resource element (Resource Element (RE)) index, a search space index, a control resource set (Control Resource Set (CORESET)) index, and an aggregation level. good.
- PRB Physical Resource Block
- RE Resource Element
- CORESET Control Resource Set
- each of the above-described embodiments may be applied when the multi-TRP or the multi-panel (operation) is set in the UE, or may be applied when the multi-TRP or the multi-panel (operation) is not set in the UE.
- each of the above-described embodiments may be applied when the UE performs an operation based on URLLC (or has an ability for URLLC), or may be applied when the UE does not.
- wireless communication system Wireless communication system
- communication is performed using any one of the wireless communication methods according to each of the above-described embodiments of the present disclosure or a combination thereof.
- FIG. 20 is a diagram showing 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 Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by Third Generation Partnership Project (3GPP). ..
- the radio communication system 1 may support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs).
- MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and dual connectivity between NR and LTE (NR-E).
- E-UTRA Evolved Universal Terrestrial Radio Access
- EN-DC E-UTRA-NR Dual Connectivity
- NE-DC -UTRA Dual Connectivity
- the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)).
- the base station (gNB) of NR is MN
- the base station (eNB) of LTE (E-UTRA) is SN.
- the wireless communication system 1 has dual connectivity between a plurality of base stations in the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )) May be supported.
- a plurality of base stations in the same RAT for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )
- NR-NR Dual Connectivity NR-DC
- gNB NR base stations
- the wireless communication system 1 includes a base station 11 that forms a macro cell C1 having a relatively wide coverage, and a base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. You may prepare.
- the user terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminal 20 are not limited to the mode shown in the figure.
- the base stations 11 and 12 are not distinguished, they are collectively referred to as the 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 (CA)) and dual connectivity (DC) using a plurality of component carriers (Component Carrier (CC)).
- CA Carrier Aggregation
- DC dual connectivity
- CC Component Carrier
- Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)).
- the macro cell C1 may be included in FR1 and the small cell C2 may be included in FR2.
- FR1 may be in a frequency band of 6 GHz or less (sub 6 GHz (sub-6 GHz)), and FR2 may be in 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) and Frequency Division Duplex (FDD) in each CC.
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- the plurality of base stations 10 may be connected by wire (for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication).
- wire for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.
- NR communication for example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 corresponding to the higher-level station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to a relay station (relay) is IAB. It may be called a node.
- IAB Integrated Access Backhaul
- relay station relay station
- 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 at least one such as Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).
- 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 communication methods such as LTE, LTE-A, and 5G.
- a wireless access method based on Orthogonal Frequency Division Multiplexing may be used.
- OFDM Orthogonal Frequency Division Multiplexing
- DL Downlink
- UL Uplink
- CP-OFDM Cyclic Prefix OFDM
- DFT-s-OFDM Discrete Fourier Transform Spread OFDM
- OFDMA Orthogonal Frequency Division Multiple. Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the wireless access method may be called a waveform.
- another wireless access system for example, another single carrier transmission system, another multi-carrier transmission system
- the UL and DL wireless access systems may be used as the UL and DL wireless access systems.
- downlink shared channels Physical Downlink Shared Channel (PDSCH)
- broadcast channels Physical Broadcast Channel (PBCH)
- downlink control channels Physical Downlink Control
- Channel PDCCH
- the uplink shared channel Physical Uplink Shared Channel (PUSCH)
- the uplink control channel Physical Uplink Control Channel (PUCCH)
- the random access channel shared by each user terminal 20 are used.
- Physical Random Access Channel (PRACH) Physical Random Access Channel or the like may be used.
- User data, upper layer control information, System Information Block (SIB), etc. are transmitted by PDSCH.
- User data, upper layer control information, and the like may be transmitted by the PUSCH.
- the Master Information Block (MIB) may be transmitted by the PBCH.
- Lower layer control information may be transmitted by PDCCH.
- the lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of PDSCH and PUSCH.
- DCI Downlink Control Information
- the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc.
- the DCI that schedules PUSCH may be called UL grant, UL DCI, etc.
- the PDSCH may be read as DL data
- the PUSCH may be read as UL data.
- a control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used for PDCCH detection.
- CORESET corresponds to a resource for searching DCI.
- the search space corresponds to the search area and search method of PDCCH candidates (PDCCH candidates).
- One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a search space based on the search space settings.
- One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
- One or more search spaces may be referred to as a search space set.
- the "search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. of the present disclosure may be read as each other.
- channel state information (Channel State Information (CSI)
- delivery confirmation information for example, it may be called Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.
- scheduling request (Scheduling Request ( Uplink Control Information (UCI) including at least one of SR))
- the PRACH may transmit a random access preamble to establish a connection with the cell.
- downlinks, uplinks, etc. may be expressed without “links”. Further, it may be expressed without adding "Physical" at the beginning of various channels.
- a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like may be transmitted.
- the DL-RS includes a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a demodulation reference signal (DeModulation).
- CRS Cell-specific Reference Signal
- CSI-RS Channel State Information Reference Signal
- DeModulation Demodulation reference signal
- Reference Signal (DMRS)), positioning reference signal (Positioning Reference Signal (PRS)), phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), 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 (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- the signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SS Block (SSB) and the like.
- SS, SSB and the like may also be called a reference signal.
- a measurement reference signal Sounding Reference Signal (SRS)
- a demodulation reference signal DMRS
- UL-RS Uplink Reference Signal
- UE-specific Reference Signal UE-specific Reference Signal
- FIG. 21 is a diagram showing an example of the 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 line interface 140 may each be provided with one or more.
- this example mainly shows the functional blocks of the feature portion in the present embodiment, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
- the control unit 110 controls the entire base station 10.
- the control unit 110 can be composed of a controller, a control circuit, and the like described based on the 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 line 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 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, a Radio Frequency (RF) 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, a measurement circuit, a transmission / reception circuit, and the like, which are described based on common recognition in the technical fields 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 composed of a transmission unit and a reception unit.
- the transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122.
- the receiving unit may be composed of a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.
- the transmitting / receiving antenna 130 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.
- the transmission / reception unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmission / reception unit 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.
- the transmission / reception unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission / reception unit 120 processes, for example, Packet Data Convergence Protocol (PDCP) layer processing and Radio Link Control (RLC) layer processing (for example, RLC) for data, control information, etc. acquired from control unit 110.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- HARQ retransmission control HARQ retransmission control
- the transmission / reception unit 120 performs channel coding (may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) for the bit string to be transmitted.
- the base band signal may be output by performing processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, digital-analog conversion, and other transmission processing.
- IFFT inverse fast Fourier transform
- the transmission / reception unit 120 may perform modulation, filtering, amplification, etc. on the baseband signal to the 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, or the like on the signal in the radio frequency band received by the transmission / reception antenna 130.
- the transmission / reception unit 120 (reception processing unit 1212) performs analog-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. )) Processing (if necessary), filtering, decoding, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing are applied. User data and the like may be acquired.
- FFT fast Fourier transform
- IDFT inverse discrete Fourier transform
- the transmission / reception unit 120 may perform measurement on the received signal.
- the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, or the like based on the received signal.
- the measuring unit 123 has received power (for example, Reference Signal Received Power (RSRP)) and reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)).
- RSRP Reference Signal Received Power
- RSSQ Reference Signal Received Quality
- SINR Signal to Noise Ratio
- Signal strength for example, Received Signal Strength Indicator (RSSI)
- propagation path 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, another base station 10 and the like, and provides user data (user plane data) and control plane for the user terminal 20. Data or the like may be acquired or transmitted.
- the transmission unit and the reception unit of the base station 10 in the present disclosure may be composed of at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
- the transmission / reception unit 120 may transmit information to the terminal for determining one or more default TCI states to be applied to each reception opportunity of repeated reception of the downlink shared channel (Physical downlink Shared Channel (PDSCH)). ..
- the control unit 110 may control the repeated reception using the spatial domain reception filter based on the one or more default TCI states.
- PDSCH Physical downlink Shared Channel
- FIG. 22 is a diagram showing an example of the 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.
- the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided with one or more.
- this example mainly shows the functional blocks of the feature portion in the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
- the control unit 210 controls the entire user terminal 20.
- the control unit 210 can be composed of a controller, a control circuit, and the like described based on the 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, measurement, and the like 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 data to the transmission / reception unit 220.
- the transmission / reception unit 220 may include a baseband unit 221 and 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 composed of 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 the 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 composed of a transmission unit and a reception unit.
- the transmission unit may be composed of a transmission processing unit 2211 and an RF unit 222.
- the receiving unit may be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.
- the transmitting / receiving antenna 230 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.
- the transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.
- the transmission / reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission / reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), and MAC layer processing (for example, for data, control information, etc. acquired from the control unit 210). , HARQ retransmission control), etc., to generate a bit string to be transmitted.
- RLC layer processing for example, RLC retransmission control
- MAC layer processing for example, for data, control information, etc. acquired from the control unit 210.
- HARQ retransmission control HARQ retransmission control
- the transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (may include error correction coding), modulation, mapping, filtering processing, DFT processing (if necessary), and IFFT processing for the bit string to be transmitted. , Precoding, digital-to-analog conversion, and other transmission processing may be performed to output the baseband signal.
- Whether or not to apply the DFT process may be based on the transform precoding setting.
- the transmission / reception unit 220 transmits the channel using the DFT-s-OFDM waveform.
- the DFT process may be performed as the transmission process, and if not, the DFT process may not be performed as the transmission process.
- the transmission / reception unit 220 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the 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, or the like on the signal in the radio frequency band 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), filtering processing, demapping, demodulation, and decoding (error correction) for the acquired baseband signal. Decoding may be included), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
- the transmission / reception unit 220 may perform measurement on the received signal.
- the measuring unit 223 may perform RRM measurement, CSI measurement, or the like based on the received signal.
- the measuring unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like.
- the measurement result may be output to the control unit 210.
- the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may be composed of at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.
- the control unit 210 may determine one or more default TCI states to be applied to each reception opportunity of repeated reception of the downlink shared channel (Physical downlink Shared Channel (PDSCH)).
- the transmission / reception unit 220 may perform the repeated reception using the spatial domain reception filter based on the one or more default TCI states.
- PDSCH Physical downlink Shared Channel
- the control unit 210 may determine that the one or more default TCI states include the Transmission Configuration Indication (TCI) states corresponding to all the set control resource sets (COntrol REsource SET (CORESET)). ..
- TCI Transmission Configuration Indication
- COntrol REsource SET COntrol REsource SET
- the control unit 210 may determine that the one or more default TCI states correspond to the order of the set or activated TCI state IDs.
- Three or more different TCI states may be allowed for the default TCI state corresponding to at least one downlink control information code point.
- each functional block is realized by using one physically or logically connected device, or directly or indirectly (for example, two or more physically or logically separated devices). , Wired, wireless, etc.) and may be realized using these plurality of devices.
- the functional block may be realized by combining the software with the one device or the plurality of devices.
- the functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
- a functional block (constituent unit) for functioning transmission may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
- the method of realizing each of them is not particularly limited.
- the base station, user terminal, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
- FIG. 23 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
- the base station 10 and the user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. ..
- the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
- processor 1001 may be a plurality of processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or by using other methods by two or more processors.
- the processor 1001 may be mounted by one or more chips.
- the processor 1001 For each function of the base station 10 and the user terminal 20, for example, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation and communicates via the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
- predetermined software program
- Processor 1001 operates, for example, an operating system to control the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like.
- CPU central processing unit
- control unit 110 210
- transmission / reception unit 120 220
- the like may be realized by the processor 1001.
- the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
- a program program code
- the control unit 110 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized in the same manner for other functional blocks.
- the memory 1002 is a computer-readable recording medium, for example, at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), or any other suitable storage medium. It may be composed of one.
- the memory 1002 may be referred to as 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, or the like that can be executed to implement the wireless communication method according to the embodiment of the present disclosure.
- the storage 1003 is a computer-readable recording medium, and is, for example, a flexible disk, a floppy (registered trademark) disk, an optical magnetic disk (for example, a compact disc (Compact Disc ROM (CD-ROM)), a digital versatile disk, etc.). At least one of Blu-ray® disks, removable disks, optical disc drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers, and other suitable storage media. It may be composed of.
- the storage 1003 may be referred to as an auxiliary storage device.
- the communication device 1004 is hardware (transmission / reception device) for communicating 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, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)). May be configured to include.
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the transmission / reception unit 120 (220), the transmission / reception antenna 130 (230), and the like 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, etc.) that receives an input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside.
- the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
- each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information.
- the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
- the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (Digital Signal Processor (DSP)), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like. It may be configured to include hardware, and a part or all of each functional block may be realized by using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
- DSP Digital Signal Processor
- ASIC Application Specific Integrated Circuit
- PLD Programmable Logic Device
- FPGA Field Programmable Gate Array
- the terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings.
- channels, symbols and signals may be read interchangeably.
- the signal may be a message.
- the reference signal may be abbreviated as RS, and may be referred to as a pilot, a pilot signal, or the like depending on the applied standard.
- the component carrier CC may be referred to as a cell, a frequency carrier, a carrier frequency, or the like.
- the wireless frame may be composed of one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) constituting the wireless frame may be referred to as a subframe.
- the subframe may be composed of one or more slots in the time domain.
- the subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.
- the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel.
- Numerology includes, for example, subcarrier spacing (SubCarrier Spacing (SCS)), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval (TTI)), number of symbols per TTI, and wireless frame configuration.
- SCS subcarrier Spacing
- TTI Transmission Time Interval
- a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, and the like may be indicated.
- the slot may be composed of one or more symbols in the time domain (Orthogonal Frequency Division Multiple Access (OFDMA) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.).
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the slot may be a time unit based on numerology.
- the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain.
- the mini-slot may also be referred to as a sub-slot.
- a minislot may consist of a smaller number of symbols than the slot.
- a PDSCH (or PUSCH) transmitted in a time unit larger than the minislot may be referred to as a PDSCH (PUSCH) mapping type A.
- the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.
- the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
- the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
- the time units such as frames, subframes, slots, mini slots, and symbols in the present disclosure may be read as each other.
- one subframe may be called TTI
- a plurality of consecutive subframes may be called TTI
- one slot or one minislot may be called TTI. That is, 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. It may be.
- the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
- the base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units.
- the definition of TTI is not limited to this.
- the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
- the time interval for example, the number of symbols
- the transport block, code block, code word, etc. may be shorter than the TTI.
- one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (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 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, or the like.
- TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.
- the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
- a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
- the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
- the number of subcarriers contained 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 1 slot, 1 mini slot, 1 subframe or 1 TTI.
- Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
- One or more RBs are a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, and an RB. It may be called a pair or the like.
- Physical RB Physical RB (PRB)
- SCG sub-carrier Group
- REG resource element group
- the resource block may be composed of one or a plurality of resource elements (Resource Element (RE)).
- RE Resource Element
- 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
- Bandwidth Part (which may also be called partial bandwidth) represents a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. May be good.
- the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- the BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
- BWP UL BWP
- BWP for DL DL BWP
- One or more BWPs may be set in one carrier for the UE.
- At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP.
- “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
- the above-mentioned structures such as wireless frames, subframes, slots, mini slots, and symbols are merely examples.
- the number of subframes contained in a wireless frame the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
- the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
- the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, radio resources may be indicated by a given index.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
- information, signals, etc. can be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layers.
- Information, signals, etc. may be input / output via a plurality of network nodes.
- Input / output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information, signals, etc. can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to another device.
- the notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using other methods.
- the notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (DCI)), uplink control information (Uplink Control Information (UCI))), and higher layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals or combinations thereof May be carried out by.
- DCI downlink control information
- UCI Uplink Control Information
- RRC Radio Resource Control
- MIB Master Information Block
- SIB System Information Block
- MAC Medium Access Control
- the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like.
- the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
- MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).
- CE MAC Control Element
- the notification of predetermined information is not limited to the explicit notification, but implicitly (for example, by not notifying the predetermined information or another information). May be done (by notification of).
- the determination may be made by a value represented by 1 bit (0 or 1), or by a boolean value represented by true or false. , May be done by numerical comparison (eg, comparison with a given value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
- Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- a transmission medium For example, a website where 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.).
- wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
- wireless technology infrared, microwave, etc.
- the terms “system” and “network” used in this disclosure may be used interchangeably.
- the “network” may mean a device (eg, a base station) included in the network.
- precoding "precoding weight”
- QCL Quality of Co-Co-Location
- TCI state Transmission Configuration Indication state
- space "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 compatible.
- Base station BS
- radio base station fixed station
- NodeB NodeB
- eNB eNodeB
- gNB gNodeB
- Access point "Transmission point (Transmission Point (TP))
- RP Reception point
- TRP Transmission / Reception Point
- Panel , "Cell”, “sector”, “cell group”, “carrier”, “component carrier” and the like
- Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
- the base station can accommodate one or more (for example, three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio)).
- Communication services can also be provided by Head (RRH))).
- RRH Head
- 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 that provide communication services in this coverage.
- MS mobile station
- UE user equipment
- terminal terminal
- Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , Handset, user agent, mobile client, client or some other suitable term.
- 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 body, the mobile body itself, or the like.
- the moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be.
- at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
- at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read by the user terminal.
- the communication between the base station and the user terminal is replaced with the communication between a plurality of user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
- D2D Device-to-Device
- V2X Vehicle-to-Everything
- Each aspect / embodiment of the present disclosure may be applied to the configuration.
- the user terminal 20 may have 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”).
- the upstream channel, the downstream channel, and the like may be read as a side channel.
- the user terminal in the present disclosure may be read as a base station.
- the base station 10 may have the functions of the user terminal 20 described above.
- the operation performed by the base station may be performed by its upper node (upper node) in some cases.
- various operations performed for communication with a terminal are performed by the base station and one or more network nodes other than the base station (for example,).
- Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. can be considered, but it is not limited to these), or it is clear that it can be performed by a combination thereof.
- each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- SUPER 3G IMT-Advanced
- 4G 4th generation mobile communication system
- 5G 5th generation mobile communication system
- 6G 6th generation mobile communication system
- xG xG (xG (x is, for example, integer, fraction)
- Future Radio Access FAA
- RAT New -Radio Access Technology
- NR New Radio
- NX New radio access
- FX Future generation radio access
- GSM registered trademark
- CDMA2000 Code Division Multiple Access
- UMB Ultra Mobile Broadband
- LTE 802.11 Wi-Fi®
- LTE 802.16 WiMAX®
- LTE 802.20 Ultra-WideBand (UWB), Bluetooth®, and other suitable radios. It may be applied to a system using a communication method, a next-generation system extended based on these, and the like.
- UMB Ultra-WideBand
- references to elements using designations such as “first” and “second” as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted or that the first element must somehow precede the second element.
- determining used in this disclosure may include a wide variety of actions.
- judgment (decision) means judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry) ( For example, searching in a table, database or another data structure), ascertaining, etc. may be considered to be "judgment”.
- judgment (decision) includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access (for example). It may be regarded as “judgment (decision)” such as “accessing” (for example, accessing data in memory).
- judgment (decision) is regarded as “judgment (decision)” of solving, selecting, selecting, establishing, comparing, and the like. May be good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of some action.
- connection are any direct or indirect connection or connection between two or more elements. Means, and can include the presence of one or more intermediate elements between two elements that are “connected” or “joined” to each other.
- the connection 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 microwaves. It can be considered to be “connected” or “coupled” to each other using frequency, electromagnetic energy having wavelengths in the light (both visible and invisible) regions, and the like.
- the term "A and B are different” may mean “A and B are different from each other”.
- the term may mean that "A and B are different from C”.
- Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Rel.16では、データ受信において繰り返し受信がサポートされている。例えば、基地局(ネットワーク(NW)、gNB)は、DLデータ(例えば、下り共有チャネル(PDSCH))の送信を所定回数だけ繰り返して行ってもよい。あるいは、UEは、ULデータ(例えば、上り共有チャネル(PUSCH))を所定回数だけ繰り返して行ってもよい。
・時間領域リソース(例えば、開始シンボル、各スロット内のシンボル数等)の割り当て、
・周波数領域リソース(例えば、所定数のリソースブロック(RB:Resource Block)、所定数のリソースブロックグループ(RBG:Resource Block Group))の割り当て、
・変調及び符号化方式(MCS:Modulation and Coding Scheme)インデックス、
・PDSCH/PUSCHの復調用参照信号(DMRS:Demodulation Reference Signal)の構成(configuration)、
・PDSCH/PUSCHの空間関係情報(spatial relation info)、又は送信構成指示(TCI:Transmission Configuration Indication又はTransmission Configuration Indicator)の状態(TCI状態(TCI-state))。
NRでは、送信設定指示状態(Transmission Configuration Indication state(TCI状態))に基づいて、信号及びチャネルの少なくとも一方(信号/チャネルと表現する)のUEにおける受信処理(例えば、受信、デマッピング、復調、復号の少なくとも1つ)、送信処理(例えば、送信、マッピング、プリコーディング、変調、符号化の少なくとも1つ)を制御することが検討されている。
・QCLタイプA(QCL-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(QCL-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(QCL-C):ドップラーシフト及び平均遅延、
・QCLタイプD(QCL-D):空間受信パラメータ。
PDCCH(又はPDCCHに関連するDMRSアンテナポート)と、あるRSとの、QCLに関する情報は、PDCCHのためのTCI状態などと呼ばれてもよい。
PDSCH(又はPDSCHに関連するDMRSアンテナポート)と、あるDL-RSとの、QCLに関する情報は、PDSCHのためのTCI状態などと呼ばれてもよい。
将来の無線通信システム(例えば、NR)では、モバイルブロードバンドのさらなる高度化(例えば、enhanced Mobile Broadband(eMBB))、多数同時接続を実現するマシンタイプ通信(例えば、massive Machine Type Communications(mMTC)、Internet of Things(IoT))、高信頼かつ低遅延通信(例えば、Ultra-Reliable and Low-Latency Communications(URLLC))などのトラフィックタイプ(タイプ、サービス、サービスタイプ、通信タイプ、ユースケース、等ともいう)が想定される。例えば、URLLCでは、eMBBより小さい遅延及びより高い信頼性が要求される。
・異なる優先度(priority)を有する論理チャネル
・変調及び符号化方式(Modulation and Coding Scheme(MCS))テーブル(MCSインデックステーブル)
・チャネル品質指示(Channel Quality Indication(CQI))テーブル
・DCIフォーマット
・当該DCI(DCIフォーマット)に含まれる(付加される)巡回冗長検査(CRC:Cyclic Redundancy Check)ビットのスクランブル(マスク)に用いられる無線ネットワーク一時識別子(Radio Network Temporary Identifier(RNTI)、例えば、System Information(SI)-RNTI)
・RRC(Radio Resource Control)パラメータ
・特定のRNTI(例えば、URLLC用のRNTI、MCS-C-RNTI等)
・サーチスペース
・DCI内のフィールド(例えば、新たに追加されるフィールド又は既存のフィールドの再利用)
NRでは、1つ又は複数の送受信ポイント(Transmission/Reception Point(TRP))(マルチTRP)が、1つ又は複数のパネル(マルチパネル)を用いて、UEに対してDL送信を行うことが検討されている。また、UEが、1つ又は複数のTRPに対してUL送信を行うことが検討されている。
マルチTRPにまたがるPDSCH繰り返し(PDSCH repetitions)がサポートされることが検討されている。周波数ドメイン又はレイヤ(空間)ドメイン又は時間ドメイン上でマルチTRPにまたがる次の繰り返し方式(スキーム)の少なくとも1つがサポートされてもよい。
・周波数分割多重(frequency division multiplexing(FDM))される繰り返し:スキーム2a(FDMスキームA)及び2b(FDMスキームB)
・時間分割多重(time division multiplexing(TDM))される繰り返し:スキーム3(TDMスキームA)及び4(TDMスキームB)
このスキームは、単一スロット内において、n(n<=Ns(空間リソース数、レイヤ数、レイヤセット数))個のTCI状態を用い、オーバラップする時間及び周波数リソース配置(allocation)を用いてもよい。各受信機会は、1つのレイヤ、又は同じトランスポートブロック(TB)のレイヤの1つのセット(レイヤセット)であってもよい。各レイヤ又はレイヤセットは、1つのTCI状態とDMRSポートの1つのセットとに関連付けられてもよい。1つの冗長バージョン(redundancy version(RV))を伴う単一コードワードは、全ての空間レイヤ又はレイヤセットにまたがって用いられてもよい。UEから見ると、異なる符号化ビットは、Rel.15と同じマッピングルールを用いて、異なるレイヤ又は異なるレイヤセットにマップされる。
このスキームは、単一スロット内において、n(n<=Nf(周波数リソース数))個のTCI状態を用い、非オーバラップ(non-overlapped)周波数リソース配置(allocation)を用いてもよい。それぞれの非オーバラップ周波数リソース配置は、1つのTCI状態に関連付けられてもよい。同じ単一又は複数のDMRSポートは、全ての非オーバラップ周波数リソース配置に関連付けられてもよい。
1つのRVを伴う単一コードワードは、リソース配置全体にまたがって用いられてもよい。UEから見ると、共通(common)リソースブロック(RB)マッピング(Rel.15と同様のコードワードからレイヤへのマッピング)は、リソース配置全体にまたがって適用されてもよい。
1つのRVを伴う単一コードワードは、それぞれの非オーバラップ周波数リソース配置に用いられてもよい。それぞれの非オーバラップ周波数リソース配置に対応するRVは、同じであってもよいし、異なってもよい。
周波数リソース配置は、マルチTRPの間において櫛(comb)状の周波数リソース配置であってもよい。ワイドバンドプリコーディングリソースブロックグループ(PRG)に対し、最初のceil(NRB/2)個のRBがTCI状態1に割り当てられ、残りのfloor (NRB/2)個のRBがTCI状態2に割り当てられてもよい。PRGサイズ=2又は4に対し、配置された周波数ドメインリソース配置(frequency domain resource allocation(FDRA))内の偶数インデックスのPRGはTCI状態1に割り当てられ、配置されたFDRA内の奇数インデックスのPRGはTCI状態2に割り当てられてもよい。
このスキームは、単一スロット内において、n(n<=Nt1(時間リソース数))個のTCI状態を用い、非オーバラップ(non-overlapped)時間リソース配置(allocation)を用いてもよい。TBの各受信機会は、ミニスロットの時間粒度(granularity)を用いて、1つのTCI状態及び1つのRVを有していてもよい。スロット内の全ての受信機会は、同じ単一又は複数のDMRSポートを有する共通のMCSを用いてもよい。RV及びTCI状態の少なくとも1つは、複数の受信機会の間において同じであってもよいし、異なっていてもよい。
このスキームは、K(n<=K)個の異なるスロットにおいて、n(n<=Nt2(時間リソース数))個のTCI状態を用いてもよい。TBの各受信機会は、1つのTCI状態及び1つのRVを有していてもよい。Kスロットにまたがる全ての受信機会は、同じ単一又は複数のDMRSポートを有する共通のMCSを用いてもよい。RV及びTCI状態の少なくとも1つは、複数の受信機会の間において同じであってもよいし、異なっていてもよい。
スケジュールされるPDSCHのサービングセルに対して設定されるQCLタイプDを含む、少なくとも1つのTCI状態を用いる、シングルDCIベースのマルチTRP/パネル送信に対し、UE固有のPDSCH用のTCI状態のアクティベーションコマンドの受信の後、もしPDCCHの受信と、対応するPDSCHと、の間の時間オフセットが、閾値(timeDurationForQCL)よりも小さい場合、UEは、PDSCHのDMRSポートが、次のデフォルトTCI状態によって指示されるQCLパラメータに従うと想定してもよい。UEは、PDSCH用にアクティベートされる2つの異なるTCI状態を含むTCIコードポイントの中の最低コードポイントに対応するTCI状態を、デフォルトTCI状態に用いてもよい。もし全てのTCIコードポイントが単一のTCI状態にマップされている場合、デフォルトTCI状態は、Rel.15の動作に従ってもよい。シングルDCIに基づく複数PDSCHに対してデフォルトTCI状態を用いることは、UE能力の一部であってもよい。
スケジュールされるPDSCHのサービングセルに対して設定されるQCLタイプDを含む、少なくとも1つのTCI状態を用いる、マルチTRP/パネル送信に対し、もしDL DCIの受信と、当該DL DCIに対応するPDSCHと、の間の時間オフセットが、閾値(timeDurationForQCL)よりも小さい場合であって、かつ、少なくとも1つのTCIコードポイントが、2つのTCI状態を示す場合、UEは、PDSCHのDMRSポートが、2つの異なるTCI状態を含むTCIコードポイントの中の、最低コードポイントに対応するTCI状態に関連するQCLパラメータに関するRSのQCLである、と想定してもよい。
本開示における一以上の実施形態において、UEは、以下の条件1-5のうち、少なくとも1つを満たしてもよい(言い換えると、以下の条件1-5の少なくとも1つを満たす場合に、UEは以下の実施形態の少なくとも1つに基づいて動作してもよい):
[条件1] PDSCHのためのDCIのスケジューリングオフセットが、ある閾値(例えば、timeDurationForQCL)未満である場合、
[条件2] UEに対して、TCIフィールド存在情報(tci-PresentInDCI)が設定されない場合、
[条件3] URLLCのためのマルチTRPが設定される場合、
[条件4] Rel.16におけるデフォルトTCI状態のスイッチ(言い換えると、以下の実施形態の少なくとも1つに基づく動作)を可能にする情報が、新たな上位レイヤシグナリング(例えば、RRCシグナリング)によって設定される場合、
[条件5] デフォルトTCI状態のスイッチが可能であることを示すUE能力情報(UE capability)が、ネットワークに報告される場合。
本実施形態において、UEは、Rel.16におけるデフォルトTCI状態のスキームを利用して、送受信の制御を行ってもよい。
DCIフォーマット(例えば、DCIフォーマット1_1)のDCIコードポイントあたりのTCI状態の数は、Rel.16において適用されうるTCI状態の数と共通であってもよい。言い換えれば、UEは、DCIフォーマット(例えば、DCIフォーマット1_1)のDCIコードポイントあたりのTCI状態の数は、Rel.16において適用されうるTCI状態の数と共通のTCI状態の数が設定され、送受信を制御してもよい。
DCIフォーマット(例えば、DCIフォーマット1_1)のDCIコードポイントあたりのTCI状態の数は、Rel.16において適用されうるTCI状態の数以上であってもよい。言い換えれば、UEは、DCIフォーマット(例えば、DCIフォーマット1_1)のDCIコードポイントあたりのTCI状態の数は、Rel.16において適用されうるTCI状態の数と共通のTCI状態の数が設定され、送受信を制御してもよい。
第2の実施形態は、繰り返し受信の各受信機会のためのデフォルトTCI状態(QCL)に関する。図15A及び15Bは、繰り返し受信のデフォルトTCI状態の一例を示す図である。図15A及び15Bは、4回の繰り返しDL受信に該当する。なお、以降の図面において、TRP、繰り返し受信/送信などに関して、異なるハッチングは、異なるTCI状態(ビーム)を意味してもよい。本実施形態において、Rel.16におけるデフォルトTCI状態のメカニズムと切り替えて運用するために、新たなRRCパラメータが導入されてもよい。
・Rel.15と同じルール(実施形態2.1.1)、
・スケジューリングDCIのTCI状態/QCL(実施形態2.1.2)。
・各CORESETのTCI状態ID/QCL ID(実施形態2.2.1)、
・RRC/MAC CEによって指示(設定、アクティベートなどと互いに読み替えられてもよい)されたTCI状態ID/QCL IDの順番(実施形態2.2.2)、
・少なくとも1つの受信機会については予め定められたTCI状態/QCLであり、残りの受信機会については設定/アクティベートされたTCI状態/QCL(実施形態2.2.3)、
・RRC/MAC CEによって指示されたビームIDの順番(実施形態2.2.4)、
・予め決定された、又はRRC/MAC CEによって指示されたCORESETの順番(実施形態2.2.5)。
・スケジューリングDCIのTCI状態、
・デフォルトTCI状態/デフォルトQCL想定、
・RRC/MAC/DCIによる明示的な指示(例えば、開始IDに関する情報の通知)、
・設定/アクティベートされたPL-RSのTCI状態、
・受信の開始時間位置(例えば、開始スロット、開始サブスロット、開始フレーム、開始サブフレーム、開始シンボル)。
上述した実施形態2.2.1-2.2.5において、導出された複数のデフォルトTCI状態の数が、繰り返し受信回数(DL受信機会の数)と同じ場合には、1対1にマッピングすればよいが、そうでない場合には、1対1にマッピングされなくてもよい。
第3の実施形態は、第2の実施形態その他の実施形態を適用するか否かが、UE能力に基づくケースを説明する。
・各受信機会について異なるTCI/QCLが適用可能か否か、
・各受信機会のデフォルトTCI状態/QCLについて異なるTCI状態が適用可能か否か、
・サポートされるTCI状態/QCLの数、
・サポートされるCORESET数、
・同じデータの繰り返しについての全受信機会の間における、ビームスイッチ数(ビームスイッチング回数)。
UEは、繰り返しPDSCHの各受信機会(スロット、サブスロットなど)のTCI状態から、上記N個のTCI状態を、ビームレポートの測定結果(例えば、L1-SINR/L1-RSRP)に基づいて決定(選択)してもよい。
上述の各実施形態は、チャネル/信号毎に独立に利用されてもよいし、複数のチャネル/信号に共通に利用されてもよい。例えば、PDSCHのデフォルトTCI状態は、それぞれ異なる方法で決定されてもよいし、共通の方法で決定されてもよい。
・PDSCH設定情報(PDSCH-Config情報要素)に含まれるパラメータ、
・PUSCHのTCI状態関連のパラメータ、
・PDSCHのリソース通知関連のパラメータ(PDSCHリソース、時間ドメインリソース割り当てリスト(PDSCH-TimeDomainResourceAllocationList情報要素)、上位レイヤパラメータ又はDCIで指示されるPUSCH繰り返し数を通知するフィールド(例えば、PDSCH repetition number fieldなどと呼ばれてもよい)の一部、上位レイヤパラメータ又はDCIで指示される周波数ドメインリソース割り当てフィールドの一部)、
・PUCCHのリソース通知関連のパラメータ(PUCCHリソース(PUCCH-Resource情報要素)、PUCCHリソースセット(PUCCH-ResourceSet情報要素)、上位レイヤパラメータ又はDCIで指示されるPUCCH繰り返し数を通知するフィールド(例えば、PUCCH repetition number fieldなどと呼ばれてもよい)の一部、DCIに含まれるPUCCHリソースインディケーターフィールドの一部、DCIに含まれるPUCCHリソースインディケーターフィールドで指示されたPUCCHリソースの一部)。
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21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22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(reference signal)は、RS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(Component Carrier(CC))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)
- 下りリンク共有チャネル(Physical downlink Shared Channel(PDSCH))の繰り返し受信の各受信機会に適用する1つ以上のデフォルト送信設定指示(Transmission Configuration Indication(TCI))状態を決定する制御部と、
前記1つ以上のデフォルトTCI状態に基づく空間ドメイン受信フィルタを用いて、前記繰り返し受信を実施する受信部と、を有する端末。 - 前記制御部は、前記1つ以上のデフォルトTCI状態が、設定された全ての制御リソースセット(COntrol REsource SET(CORESET))に対応するTransmission Configuration Indication(TCI)状態を含むように決定する請求項1に記載の端末。
- 前記制御部は、前記1つ以上のデフォルトTCI状態が、設定又はアクティベートされたTCI状態IDの順番に対応するように決定する請求項1に記載の端末。
- 少なくとも1つの下り制御情報コードポイントに対応するデフォルトTCI状態について、3以上の異なるTCI状態が許容される請求項1に記載の端末。
- 下りリンク共有チャネル(Physical downlink Shared Channel(PDSCH))の繰り返し受信の各受信機会に適用する1つ以上のデフォルト送信設定指示(Transmission Configuration Indication(TCI))状態を決定するステップと、
前記1つ以上のデフォルトTCI状態に基づく空間ドメイン受信フィルタを用いて、前記繰り返し受信を実施するステップと、を有する端末の無線通信方法。 - 下りリンク共有チャネル(Physical downlink Shared Channel(PDSCH))の繰り返し受信の各受信機会に適用する1つ以上のデフォルト送信設定指示(Transmission Configuration Indication(TCI))状態を決定するための情報を、端末に送信する送信部と、
前記1つ以上のデフォルトTCI状態に基づく空間ドメイン受信フィルタを用いた前記繰り返し受信を制御する制御部と、を有する基地局。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/910,997 US20230171611A1 (en) | 2020-03-13 | 2020-03-13 | Terminal, radio communication method, and base station |
PCT/JP2020/011207 WO2021181684A1 (ja) | 2020-03-13 | 2020-03-13 | 端末、無線通信方法及び基地局 |
CN202080100496.3A CN115516955A (zh) | 2020-03-13 | 2020-03-13 | 终端、无线通信方法以及基站 |
EP20923978.9A EP4120718A4 (en) | 2020-03-13 | 2020-03-13 | TERMINAL, WIRELESS COMMUNICATION METHOD AND BASE STATION |
JP2022505709A JP7500703B2 (ja) | 2020-03-13 | 2020-03-13 | 端末、無線通信方法及びシステム |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2020/011207 WO2021181684A1 (ja) | 2020-03-13 | 2020-03-13 | 端末、無線通信方法及び基地局 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021181684A1 true WO2021181684A1 (ja) | 2021-09-16 |
Family
ID=77672154
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2020/011207 WO2021181684A1 (ja) | 2020-03-13 | 2020-03-13 | 端末、無線通信方法及び基地局 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20230171611A1 (ja) |
EP (1) | EP4120718A4 (ja) |
JP (1) | JP7500703B2 (ja) |
CN (1) | CN115516955A (ja) |
WO (1) | WO2021181684A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023137623A1 (en) * | 2022-01-19 | 2023-07-27 | Qualcomm Incorporated | Transmission configuration indicator state identification in wireless communications |
WO2024098191A1 (en) * | 2022-11-07 | 2024-05-16 | Apple Inc. | Transmission configuration indicator (tci) state switching improvement for multi-panel user equipment |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115606285A (zh) * | 2020-05-15 | 2023-01-13 | 苹果公司(Us) | 用于pucch可靠性增强的控制信令 |
US11647530B2 (en) * | 2020-12-21 | 2023-05-09 | Qualcomm Incorporated | Transmission configuration indicator (TCI) state groups |
US11937106B2 (en) * | 2021-08-23 | 2024-03-19 | Qualcomm Incorporated | CRS rate matching request in DSS |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019244221A1 (ja) * | 2018-06-18 | 2019-12-26 | 株式会社Nttドコモ | ユーザ端末 |
US20200074988A1 (en) * | 2019-04-23 | 2020-03-05 | Lg Electronics Inc. | Method and apparatus for determining voice enable device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI3711411T3 (fi) * | 2017-11-15 | 2023-10-04 | Interdigital Patent Holdings Inc | Säteen hallinta langattomassa verkossa |
CN111512587B (zh) * | 2018-02-12 | 2023-05-16 | 富士通株式会社 | 配置信息的接收和发送方法、装置及通信系统 |
CN113507746B (zh) | 2018-07-18 | 2024-06-11 | 中兴通讯股份有限公司 | 一种信息元素的传输方法、装置及系统 |
-
2020
- 2020-03-13 CN CN202080100496.3A patent/CN115516955A/zh active Pending
- 2020-03-13 JP JP2022505709A patent/JP7500703B2/ja active Active
- 2020-03-13 US US17/910,997 patent/US20230171611A1/en active Pending
- 2020-03-13 EP EP20923978.9A patent/EP4120718A4/en active Pending
- 2020-03-13 WO PCT/JP2020/011207 patent/WO2021181684A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019244221A1 (ja) * | 2018-06-18 | 2019-12-26 | 株式会社Nttドコモ | ユーザ端末 |
US20200074988A1 (en) * | 2019-04-23 | 2020-03-05 | Lg Electronics Inc. | Method and apparatus for determining voice enable device |
Non-Patent Citations (2)
Title |
---|
"Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8", 3GPP TS 36.300, April 2010 (2010-04-01) |
See also references of EP4120718A4 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023137623A1 (en) * | 2022-01-19 | 2023-07-27 | Qualcomm Incorporated | Transmission configuration indicator state identification in wireless communications |
WO2024098191A1 (en) * | 2022-11-07 | 2024-05-16 | Apple Inc. | Transmission configuration indicator (tci) state switching improvement for multi-panel user equipment |
Also Published As
Publication number | Publication date |
---|---|
JPWO2021181684A1 (ja) | 2021-09-16 |
US20230171611A1 (en) | 2023-06-01 |
EP4120718A4 (en) | 2023-12-06 |
JP7500703B2 (ja) | 2024-06-17 |
CN115516955A (zh) | 2022-12-23 |
EP4120718A1 (en) | 2023-01-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2021181684A1 (ja) | 端末、無線通信方法及び基地局 | |
JP7499787B2 (ja) | 端末、無線通信方法及びシステム | |
WO2020209282A1 (ja) | ユーザ端末及び無線通信方法 | |
WO2021181666A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2022024379A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2021090507A1 (ja) | 端末及び無線通信方法 | |
JP7330598B2 (ja) | 端末、無線通信方法、基地局及びシステム | |
WO2021220474A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2021186700A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2022030011A1 (ja) | 端末、無線通信方法及び基地局 | |
JP7480176B2 (ja) | 端末、無線通信方法及びシステム | |
WO2021229820A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2021220475A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2021192302A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2021106168A1 (ja) | 端末及び無線通信方法 | |
WO2021090506A1 (ja) | 端末及び無線通信方法 | |
WO2022153458A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2022054236A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2022085179A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2022014055A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2021171566A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2021205604A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2021181667A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2021192303A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2021220473A1 (ja) | 端末、無線通信方法及び基地局 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 20923978 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022505709 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2020923978 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2020923978 Country of ref document: EP Effective date: 20221013 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |