WO2022130638A1 - 端末、無線通信方法及び基地局 - Google Patents
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- H—ELECTRICITY
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- H04W72/12—Wireless traffic scheduling
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- H—ELECTRICITY
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- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- 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
- UMTS Universal Mobile Telecommunications System
- 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).
- a successor system to LTE for example, 5th generation mobile communication system (5G), 5G + (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 or later, etc.
- 5G 5th generation mobile communication system
- 6G 6th generation mobile communication system
- NR New Radio
- the repeated transmission to the UL data channel (for example, the uplink shared channel (Physical Uplink Shared Channel (PUSCH))) is supported.
- the UE controls to transmit the PUSCH over a plurality of slots (for example, K consecutive slots) based on the repetition factor K set from the network (for example, a base station). That is, in the case of repeated transmission, each PUSCH is transmitted in a different slot (for example, in slot units).
- each PUSCH is transmitted in units shorter than the slot (for example, in subslot units and minislot units).
- TRP Transmission / Reception Point
- one of the purposes of the present disclosure is to provide a terminal, a wireless communication method, and a base station capable of appropriately controlling PUSCH repetitive transmission.
- the terminal includes a receiving unit that receives one downlink control information (Downlink Control Information (DCI)) for a plurality of uplink shared channels (Physical Uplink Shared Channel (PUSCH)), and the above-mentioned terminal.
- DCI Downlink Control Information
- PUSCH Physical Uplink Shared Channel
- PUSCH repetitive transmission can be appropriately controlled even when multi-TRP is applied.
- 1A and 1B are diagrams showing an example of repeated transmission of PUSCH.
- 2A and 2B are diagrams showing an example of an invalid symbol pattern.
- 3A and 3B are diagrams showing an example of nominal repetitions and actual repetitions.
- FIG. 4 is a diagram showing an example of repeated transmission of PUSCH in a multi-TRP.
- 5A-5C are diagrams showing an example of a single PUSCH transmission, a PUSCH repetitive transmission for a single TRP, and a PUSCH repetitive transmission for a plurality of TRPs.
- 6A-6C are diagrams showing an example of correspondence between a plurality of SRIs and a plurality of repeated transmissions.
- FIG. 7A and 7B are diagrams showing an example of repeated transmission of PUSCH for single and multiple TRPs according to the 2-1 embodiment.
- 8A and 8B are diagrams showing an example of repeated transmission of PUSCH for single and multiple TRPs according to the second embodiment.
- FIG. 9 shows Rel. It is a figure which shows an example of the SRI field defined by 16.
- FIG. 10 is a diagram showing an example of repeated transmission of PUSCH for a single TRP according to the second embodiment.
- FIG. 11 is a diagram showing an example of repeated transmission of PUSCH for a plurality of TRPs according to the second embodiment.
- FIG. 12 is a diagram showing an example of the relationship between the TPMI field and the SRI field according to the modified example of the second embodiment.
- FIG. 13 is a diagram showing an example of repeated transmission of PUSCH for a single TRP according to Modification 2-3.
- FIG. 14 is a diagram showing an example of repeated transmission of PUSCH for a plurality of TRPs according to Modification 2-3.
- FIG. 15 is a diagram showing an example of a single PUSCH transmission according to the 3-1 embodiment.
- FIG. 16 is a diagram showing an example of a single PUSCH transmission according to the third embodiment.
- FIG. 17 is a diagram showing an example of a single PUSCH transmission according to the third embodiment.
- FIG. 18 is a diagram showing an example of a single PUSCH transmission according to the third to fourth embodiment.
- FIG. 19 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
- FIG. 20 is a diagram showing an example of the configuration of a base station according to an embodiment.
- FIG. 21 is a diagram showing an example of the configuration of a user terminal according to an embodiment.
- FIG. 22 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
- repeated transmission is supported in data transmission.
- a base station network (NW), gNB) repeatedly transmits DL data (for example, downlink shared channel (PDSCH)) a predetermined number of times.
- DL data for example, downlink shared channel (PDSCH)
- UL data for example, uplink shared channel (PUSCH)
- FIG. 1A is a diagram showing an example of repeated transmission of PUSCH.
- FIG. 1A shows an example in which a single DCI schedules a predetermined number of repeated PUSCHs. The number of repetitions is also referred to as a repetition factor K or an aggregation factor K.
- the repetition coefficient K 4, but the value of K is not limited to this.
- the nth repetition is also called an nth transmission opportunity or the like, and may be identified by the repetition index k (0 ⁇ k ⁇ K-1).
- FIG. 1A shows the repeated transmission of the PUSCH dynamically scheduled by DCI (for example, the dynamic grant-based PUSCH), it may be applied to the repeated transmission of the set grant-based PUSCH.
- the UE receives information indicating the repetition coefficient K (for example, aggregationFactorUL or aggregationFactorDL) quasi-statically by higher 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 contiguous 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): -Allocation 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, -Configuration of PUSCH demodulation reference signal (DMRS), -The state (TCI-state) of the spatial relation information (spatial relation info) of PUSCH or the transmission configuration instruction (TCI: Transmission Configuration Indication or Transmission Configuration Indicator).
- a PDSCH reception process eg, reception,
- FIG. 1A shows a case where the PUSCH in each slot is assigned to a predetermined number of symbols from the beginning of the slot.
- the same symbol allocation between slots may be determined as described in Time Domain Resource Allocation above.
- the UE is a symbol in each slot based on a start symbol S and a number of symbols L (eg, Start and Length Indicator (SLIV)) determined based on the value m of a predetermined field (eg, TDRA field) in the DCI.
- L Start and Length Indicator
- the allocation may be decided.
- the UE may determine the first slot based on the K2 information determined based on the value m of a predetermined field of DCI (eg, 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 (transmission opportunity, repeat) may be determined based on the value of a predetermined field (eg, RV field) in the DCI.
- the resources allocated in the K consecutive slots are the vertical link communication direction instruction information for TDD control (for example, "TDD-UL-DL-ConfigCommon", “TDD-UL-DL-ConfigDedicated” of RRC IE) and If the communication direction is different in at least one symbol from UL, DL or Flexible of each slot specified by at least one of the slot format identifiers (Slot format indicator) of DCI (for example, DCI format 2_0), the symbol is used.
- the resource of the included slot may not be transmitted (or received).
- the PUSCH is repeatedly transmitted over a plurality of slots (in slot units). From 16 onwards, it is assumed that PUSCH is repeatedly transmitted in units shorter than the slot (for example, in units of subslots, units of mini slots, or units of a predetermined number of symbols) (see FIG. 1B).
- the repetition coefficient K 4, but the value of K is not limited to this.
- the nth repetition is also called an nth transmission opportunity or the like, and may be identified by the repetition index k (0 ⁇ k ⁇ K-1).
- FIG. 1B shows the repeated transmission of the PUSCH dynamically scheduled by DCI (for example, the dynamic grant-based PUSCH), it may be applied to the repeated transmission of the set grant-based PUSCH.
- the UE performs PUSCH transmission (for example, for example) in a predetermined slot based on the start symbol S and the number of symbols L (for example, StartSymbol and length) determined based on the value m of the predetermined field (for example, TDRA field) in the DCI of the PUSCH.
- the UE may determine a predetermined slot based on Ks information determined based on the value m of a predetermined field (for example, TDRA field) of DCI.
- the UE may dynamically receive information indicating the repetition coefficient K (for example, numberofrepetitions) by downlink control information.
- the repeat factor may be determined based on the value m of a predetermined field (eg, TDRA field) in the DCI. For example, a table in which the correspondence between the bit value notified by DCI and the repetition coefficient K, the start symbol S, and the number of symbols L may be defined may be supported.
- the slot-based repetitive transmission shown in FIG. 1A is called a repetitive transmission type A (for example, PUSCH repetition Type A), and the subslot-based repetitive transmission shown in FIG. 1B is called a repetitive transmission type B (for example, PUSCH repetition Type B). ) May be called.
- a repetitive transmission type A for example, PUSCH repetition Type A
- a repetitive transmission type B for example, PUSCH repetition Type B
- the UE may be set to apply at least one of the repetitive transmission type A and the repetitive transmission type B.
- the base station may notify the UE of the iterative transmission type applied by the UE by higher layer signaling (eg, PUSCHRepTypeIndicator).
- Either one of the repetitive transmission type A and the repetitive transmission type B may be set in the UE for each DCI format for which the PUSCH is scheduled.
- a first DCI format eg DCI format 0_1
- higher layer signaling eg PUSCHRepTypeIndicator-AorDCIFormat0_1
- repeat transmission type B eg PUSCH-RepTypeB
- the UE will be the first DCI.
- Repeated transmission type B is applied to the PUSCH repeated transmission scheduled in the format.
- the UE applies the UE repeatedly send type A for the PUSCH repeats scheduled in the first DCI format. do.
- the PUSCH included in the upper layer parameter is set.
- the number of repetitions (eg, 1, 2, 3, 4, 7, 8, 12 or 16) may be set by a parameter relating to the number of repetitions (eg, numberOfRepetitions-r16).
- the UE may determine the number of PUSCH iterations scheduled by the DCI based on the DCI's time domain resource allocation field. When the number of iterations is set / specified to 1, the UE may make a single PUSCH transmission.
- (Invalid symbol pattern) When repeatedly transmitting type B is applied to PUSCH transmission, it is also considered to notify the UE of information about a symbol (or symbol pattern) that cannot be used for PUSCH transmission.
- the symbol pattern that cannot be used for PUSCH transmission may be referred to as an invalid symbol pattern, an invalid symbol pattern, an validate symbol pattern, or the like.
- the DCI may be in a predetermined DCI format (eg, at least one of the DCI formats 0_1 and 0_1).
- the UE is notified of information about an invalid symbol pattern that cannot be used for PUSCH transmission by using the first upper layer parameter. Further, the UE may be notified by using DCI whether or not the information regarding the invalid symbol pattern is applied. In this case, a bit field (a field for notifying whether or not the invalid symbol pattern is applied) for instructing whether or not the information regarding the invalid symbol pattern is applied may be set in DCI.
- the UE may be notified whether or not the notification field (or additional bit) is set in the DCI by using the second upper layer parameter. That is, when the information regarding the invalid symbol pattern is notified by the first upper layer parameter, the UE may determine whether or not the information regarding the invalid symbol pattern is applied based on the second upper layer parameter and DCI. ..
- the UE may control the transmission of the PUSCH without considering the invalid symbol pattern.
- the UE may determine whether or not the invalid symbol pattern is applied based on the second upper layer parameter and DCI. For example, when the second upper layer parameter instructs the DCI to add an additional bit (or a predetermined field) indicating whether or not the invalid symbol pattern is applied, the UE is instructed to add an invalid symbol pattern based on the predetermined field. Whether or not it is applied may be determined.
- the first upper layer parameter may be any information as long as it is information for notifying a symbol pattern that is invalid for PUSCH transmission, and for example, a bitmap format may be applied (see FIG. 2A).
- FIG. 2A is a diagram showing an example of a case where the invalid symbol pattern is defined by a bitmap (1-D bitmap) for the time domain.
- the UE may determine the resources available for PUSCH transmission in one or more frequency bandwidths (eg, BWP) based on the information about the invalid symbol pattern (see FIG. 2B).
- BWP frequency bandwidths
- FIG. 3A shows an example of applying the repeat transmission type B when the repeat coefficient (K) is 4 and the PUSCH length (L) is 4.
- PUSCH transmission may be performed using a symbol excluding the DL symbol (see FIG. 3B).
- PUSCH transmission may be performed using a symbol other than the DL symbol portion.
- the PUSCH may be divided (or segmented).
- repeated transmission before considering the DL symbol, invalid symbol, or slot boundary may be referred to as nominal repetitions.
- Repeated transmission considering DL symbols, invalid symbols, or slot boundaries may be referred to as actual repetitions.
- the UE is in the information (SRS configuration information, eg, “SRS-Config” of the RRC control element) used to transmit the measurement reference signal (eg, Sounding Reference Signal (SRS)). Parameters) may be received.
- SRS configuration information eg, “SRS-Config” of the RRC control element
- SRS Sounding Reference Signal
- the UE has information about one or more SRS resource sets (SRS resource set information, for example, "SRS-ResourceSet” of RRC control element) and information about one or more SRS resources (SRS resource). At least one piece of information, eg, the RRC control element "SRS-Resource”), may be received.
- SRS resource set information for example, "SRS-ResourceSet” of RRC control element
- SRS resource information about one or more SRS resources
- One SRS resource set may be related to a predetermined number of SRS resources (a predetermined number of SRS resources may be grouped).
- Each SRS resource may be specified by an SRS resource identifier (SRS Resource Indicator (SRI)) or an SRS resource ID (Identifier).
- SRI SRS Resource Indicator
- SRS resource ID Identifier
- the SRS resource set information includes an SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type (for example, periodic SRS (Periodic SRS), semi-persistent). Information on SRS (Semi-Persistent SRS), aperiodic CSI (Aperiodic SRS)), and usage of SRS may be included.
- SRS-ResourceSetId SRS resource set ID
- SRS-ResourceId list of SRS resource IDs used in the resource set
- an SRS resource type for example, periodic SRS (Periodic SRS), semi-persistent.
- Information on SRS Semi-Persistent SRS
- aperiodic CSI Aperiodic SRS
- the SRS resource types are periodic SRS (Periodic SRS (P-SRS)), semi-persistent SRS (Semi-Persistent SRS (SP-SRS)), and aperiodic CSI (Aperiodic SRS (A-SRS)). May indicate either.
- the UE may transmit P-SRS and SP-SRS periodically (or periodically after activation), and may transmit A-SRS based on DCI's SRS request.
- RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse" are, for example, beam management, codebook (CB), noncodebook (noncodebook (). NCB)), antenna switching, etc. may be used.
- SRS for codebook or non-codebook applications may be used to determine a precoder for codebook-based or non-codebook-based PUSCH transmission based on SRI.
- the UE is a precoder for PUSCH transmission based on the SRI, transmission rank indicator (Transmitted Rank Indicator (TRI)), and transmission precoding matrix indicator (Transmitted Precoding Matrix Indicator (TPMI)). May be determined.
- the UE may determine a precoder for PUSCH transmission based on SRI.
- the SRS resource information includes SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, transmission Comb, SRS resource mapping (for example, time and / or frequency resource position, resource offset, resource cycle, number of repetitions, SRS). It may include (number of symbols, SRS bandwidth, etc.), hopping-related information, SRS resource type, series ID, SRS spatial-related information, and the like.
- SRS resource ID SRS-ResourceId
- number of SRS ports for example, number of SRS ports, SRS port number, transmission Comb
- SRS resource mapping for example, time and / or frequency resource position, resource offset, resource cycle, number of repetitions, SRS. It may include (number of symbols, SRS bandwidth, etc.), hopping-related information, SRS resource type, series ID, SRS spatial-related information, and the like.
- the spatial relationship information of the SRS may indicate the spatial relationship information between the predetermined reference signal and the SRS.
- the predetermined reference signal includes a synchronization signal / broadcast channel (Synchronization Signal / Physical Broadcast Channel (SS / PBCH)) block, a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and an SRS (for example, another). It may be at least one of SRS).
- the SS / PBCH block may be referred to as a sync signal block (SSB).
- the SRS spatial relationship information may include at least one of the SSB index, the CSI-RS resource ID, and the SRS resource ID as the index of the predetermined reference signal.
- the SSB index, SSB resource ID, and SSB Resource Indicator may be read as each other. Further, the CSI-RS index, the CSI-RS resource ID and the CSI-RS Resource Indicator (CRI) may be read as each other. Further, the SRS index, SRS resource ID and SRI may be read as each other.
- the SRS spatial relationship information may include a serving cell index, a BWP index (BWP ID), and the like corresponding to the above-mentioned predetermined reference signal.
- the UE When the UE sets spatial relation information regarding SSB or CSI-RS and SRS for a certain SRS resource, the UE is a spatial domain filter (spatial domain reception filter) for receiving the SSB or CSI-RS.
- the SRS resource may be transmitted using the same spatial domain filter (spatial domain transmission filter) as above. In this case, the UE may assume that the SSB or CSI-RS UE receive beam and the SRS UE transmit beam are the same.
- the UE When the UE sets spatial relational information about another SRS (reference SRS) and the SRS (target SRS) for one SRS (target SRS) resource, the UE is a spatial domain filter for transmitting the reference SRS.
- the target SRS resource may be transmitted using the same spatial domain filter (spatial domain transmission filter) as the (spatial domain transmission filter). That is, in this case, the UE may assume that the UE transmission beam of the reference SRS and the UE transmission beam of the target SRS are the same.
- the UE may determine the spatial relationship of the PUSCH scheduled by the DCI based on the value of a predetermined field (eg, the SRS Resource Identifier (SRI) field) in the DCI (eg, DCI format 0_1). Specifically, the UE may use the spatial relationship information of the SRS resource (for example, “spatialRelationInfo” of the RRC information element) determined based on the value of the predetermined field (for example, SRI) for PUSCH transmission.
- a predetermined field eg, the SRS Resource Identifier (SRI) field
- SRI SRS Resource Identifier
- the UE When using codebook-based transmission for the PUSCH, the UE has two SRS resources configured by RRC per SRS resource set and one of the two SRS resources indicated by DCI (1 bit SRI field). You may. When using non-codebook-based transmission for PUSCH, the UE sets four SRS resources per SRS resource set by RRC and directs one of the four SRS resources by DCI (2-bit SRI field). May be done.
- the transmitted precoding matrix indicator (TPMI) and transmission rank for codebook-based PUSCH transmission are included in the downlink control information (eg, DCI format 0_1) (eg, DCI format 0-1). For example, it is being considered to be specified by the precoding information and the number of layers field).
- the precoder used by the UE for codebook-based PUSCH transmissions is selected from uplink codebooks that have the same number of antenna ports as the values set in the higher layer parameters set for SRS resources (eg nrofSRS-Ports). May be done.
- the size (number of bits) of the particular field is variable depending on the number of antenna ports for PUSCH (eg, the number of ports indicated by nrofSRS-Ports above) and some higher layer parameters.
- the specific field may be 0 bits when the upper layer parameter (for example, txConfig) set for the UE is set in the noncodebook.
- the upper layer parameter for example, txConfig
- the specific field may be 0 bit for one antenna port when the upper layer parameter (for example, txConfig) set for the UE is set in the codebook. ..
- the particular field is set for the UE if the higher layer parameters (eg, txConfig) set for the UE are set in the codebook for the four antenna ports. It may have a bit length of 2 to 6 bits based on at least one of the other higher layer parameters and the presence or absence (valid or invalid) of the transform precoder.
- the higher layer parameters eg, txConfig
- the particular field is set for the UE if the higher layer parameters (eg, txConfig) set for the UE for the two antenna ports are set in the codebook. It may have a bit length of 1 to 4 bits based on at least one of the other higher layer parameters and the presence or absence (valid or invalid) of the transform precoder.
- the higher layer parameters eg, txConfig
- the other upper layer parameters are a parameter for specifying the full power transmission mode of the UL (for example, ul-FullPowerTransmission), a parameter indicating the maximum value of the transmission rank of the UL (for example, maxRank), and a precoding matrix indicator (for example, maxRank). It may be at least one of a parameter (for example, codebookSubset) indicating a subset of PMI) and a parameter for specifying a transform precoder (for example, transformPrecoder).
- a parameter for specifying the full power transmission mode of the UL for example, ul-FullPowerTransmission
- a parameter indicating the maximum value of the transmission rank of the UL for example, maxRank
- a precoding matrix indicator for example, maxRank
- It may be at least one of a parameter (for example, codebookSubset) indicating a subset of PMI) and a parameter for specifying a transform precoder (for example, transformPrecoder).
- 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 performs UL transmission to one or more TRPs (see FIG. 4).
- TRP Transmission / Reception Point
- 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.
- repeated transmission of PUSCHs in multiple TRPs is set to enable, and one DCI for repeated transmissions of PUSCHs in multiple TRPs contains a specific number (eg, two) of SRI fields. Cases included are being considered.
- 5A-5C are diagrams showing an example of single PUSCH transmission, repeated transmission of PUSCH for a single TRP, and repeated transmission of PUSCH for a plurality of TRPs.
- the UE makes a single PUSCH transmission using the first SRI determined from the first SRI field.
- the UE repeatedly transmits PUSCH for a single TRP using the first SRI determined from the first SRI field.
- the UE uses a first SRI determined from a first SRI field and a second SRI determined from a second SRI field to provide a PUSCH for multiple TRPs. Repeat transmission.
- a predetermined antenna port for example, a demodulation reference signal (DMRS) port
- a predetermined antenna port group for example, a DMRS port group
- a predetermined group for example, Code Division Multiplexing (for example).
- the CDM)) group, the predetermined reference signal group, the CORESET group, the panel group, the beam group, the spatial relationship group, the PUCCH group), and the CORESET pool may be read as each other.
- the panel Identifier (ID) and the panel may be read as each other.
- TRP ID and TRP may be read as each other.
- index, ID, indicator, and resource ID may be read as each other.
- a / B may mean “at least one of A and B”. Further, in the present disclosure, “A / B / C” may mean “at least one of A, B and C”.
- SRI spatial relation information
- SRS resource indicator SRS Resource Indicator (SRI)
- SRI SRS Resource Indicator
- SRI field SRS resource indicator
- SRS resource precoder
- spatial relation information SRI
- SRI spatial relation information
- SRI for codebook-based transmission SRI for codebook-based transmission
- non-codebook-based SRI combination SRI for codebook-based transmission
- spatialRelationInfo UL TCI
- TCI status Unified TCI
- QCL Unified TCI
- the first TRP and the second TRP are the first PUSCH and the second PUSCH, the first PUSCH transmission opportunity and the second PUSCH transmission opportunity, the first SRI and the second SRI, and the like. May be read as each other.
- the repeated transmission of PUSCH for a plurality of TRPs may be read as a PUSCH over a plurality of TRPs, a repeated PUSCH over a plurality of TRPs, a simple repeated PUSCH, a repeated transmission, a plurality of PUSCH transmissions, and the like.
- a single PUSCH transmission for a single TRP may be referred to simply as a single PUSCH transmission, a PUSCH transmission in a single TRP, and the like.
- the repeated transmission of PUSCH for a single TRP may mean the repeated transmission of a plurality of PUSCHs transmitted using the same SRI / beam / precoder.
- the repeated transmission of PUSCHs for a plurality of TRPs may mean the repeated transmission of a plurality of PUSCHs transmitted using a plurality of different SRIs / beams / precoders.
- the repetitive transmission and the plurality of SRIs / beams / precoders may correspond cyclically, sequentially by a specific number, or half-half.
- a pattern (mapping) may be used. Cyclic correspondence, sequential correspondence, and correspondence using a half-half pattern (mapping) will be described in detail in the following embodiments.
- each SRI field may indicate one or more SRS resources (SRIs) to the UE.
- SRIs SRS resources
- the case where the number of the plurality of TRPs, the plurality of SRIs, etc. is two will be described as a main example, but these numbers may be three or more.
- the "dynamic switch” in the present disclosure may mean “a switch using at least one of upper layer signaling and physical layer signaling”.
- the "switch” in the present disclosure may be read as “switching", “changing”, “changing”, “applying”, and the like.
- the dynamic switching between the PUSCH transmission in a single PUSCH / the repeated transmission of the PUSCH in a single TRP and the repeated transmission of the PUSCH in a plurality of TRPs may not be performed.
- the specification may not support the dynamic switching of PUSCH repetitive transmissions in a single PUSCH / single TRP and PUSCH repetitive transmissions in multiple TRPs.
- Embodiment 1-1 when repeated transmissions in multiple TRPs are set to enable by higher layer signaling (eg, RRC signaling / MAC CE), the UEs are of a specific number (eg, two or more). It may be assumed (assume, expect) that repeated transmission of PUSCH using different SRIs is instructed.
- higher layer signaling eg, RRC signaling / MAC CE
- the dynamic switching between the repeated transmission of the PUSCH in a single TRP and the repeated transmission of the PUSCH in a plurality of TRPs may not be allowed (Embodiment 1-1-1).
- the SRI indicated by the first SRI field and the SRI indicated by the second SRI field are It is desirable to be different.
- the UE is set to enable repeated transmission in a plurality of TRPs by higher layer signaling (for example, RRC signaling / MAC CE), and the number of repeated transmissions is 1. You may assume that it will not be set / instructed (assume, expect).
- higher layer signaling for example, RRC signaling / MAC CE
- a dynamic switch between the repeated transmission of the PUSCH in a single TRP and the repeated transmission of the PUSCH in a plurality of TRPs may be performed.
- a dynamic switch between repeated transmission of PUSCH in a single TRP and repeated transmission of PUSCH in multiple TRPs may be supported.
- the UE when the repeated transmission in a plurality of TRPs is set to enable by the upper layer signaling (for example, RRC signaling / MAC CE), a specific number (for example, two) in one DCI. SRI fields may be included. If the parameter for the number of iterations notified by DCI is specified / set to a value greater than 1, the UE performs either iterations for a single TRP or iterations for multiple TRPs as follows: It may be determined by at least one of the methods described in embodiments 2-1 to 2-3.
- the upper layer signaling for example, RRC signaling / MAC CE
- Embodiment 2-1 Repeated transmission or repetitive transmission for a single TRP based on whether a particular number (eg, two) of SRI fields points to the same SRS resource (SRI) or different SRIs. Decide to make one of the repeated transmissions for multiple TRPs, Embodiment 2-2: In each of the plurality of SRI fields, either the iterative transmission for a single TRP or the iterative transmission for multiple TRPs is indicated, depending on whether a code point that is not applied is indicated. Decide to do, Embodiment 2-3: Based on the specific field included in the DCI, it is determined to perform either the iterative transmission for a single TRP or the iterative transmission for a plurality of TRPs.
- a particular number eg, two
- SRI SRS resource
- a code point that does not apply may be read as an inapplicable code point, a reserved (reserved) code point, a code point indicating Not applied, and the like.
- the code point that does not apply is Rel. It may be a reserved code point in the SRI field in 16.
- "Not applied” in the present disclosure may be read as "Not Applicable”, “Not Available”, “N / A”, “not valid” and the like.
- the specific field included in the DCI is Rel. It may be a field introduced after 17, or Rel. Reserved code points of a specific field included in the DCI defined by 16 may be utilized.
- Embodiment 2-1 the UE simply bases on either a particular number (eg, two) of SRI fields pointing to the same SRS resource (SRI) or different SRIs. It may be decided to perform either repetitive transmission for one TRP or repetitive transmission for multiple TRPs.
- SRI SRS resource
- the UE determines that repeated transmissions of multiple PUSCHs are made in the same SRI (eg, single TRP). You may. In other words, when the same SRS resource (SRI) is indicated in multiple (eg, two) SRI fields, the UE may decide to make repeated transmissions of PUSCH in a single TRP.
- SRI SRS resource
- the UE may repeatedly transmit the plurality of PUSCHs in different SRIs (eg, multiple TRPs). You may decide. In other words, when different SRS resources (SRIs) are indicated in multiple (eg, two) SRI fields, the UE may decide to repeatedly transmit PUSCHs in multiple TRPs.
- the UE When the UE decides to perform repeated transmission of PUSCH in a plurality of TRPs, it may determine that the plurality of SRIs correspond to the plurality of repeated transmissions and cyclical transmission.
- FIG. 6A is a diagram showing an example in which a plurality of SRIs and a plurality of repeated transmissions correspond cyclically.
- the UE is designated with 6 as the number of repetitions, and repeatedly transmits the PUSCH using the first SRI and the second SRI.
- the UE cyclically performs PUSCH transmission using the first SRI and PUSCH transmission using the second SRI.
- the first SRI is applied to odd-numbered iterations (repetitions # 1, # 3, # 5) and the second SRI is applied to even-numbered iterations (repetitions # 0, # 2, # 4). May be good.
- the UE decides to perform repeated transmissions of PUSCHs in multiple TRPs, even if it is determined that the plurality of SRIs correspond to the plurality of repeated transmissions and a specific number (for example, two) sequentially. good.
- FIG. 6B is a diagram showing an example in which a plurality of SRIs and a plurality of repeated transmissions sequentially correspond to each other.
- the UE is designated with 6 as the number of repetitions, and repeatedly transmits the PUSCH using the first SRI and the second SRI.
- the UE sequentially performs the PUSCH transmission using the first SRI and the PUSCH transmission using the second SRI twice.
- the UE decides to perform repeated transmission of PUSCH in multiple TRPs, even if the plurality of SRIs and the plurality of repeated transmissions continuously correspond to the number obtained by dividing the number of repetitions by the number of SRIs. good.
- the correspondence may be referred to as a half-half pattern (mapping).
- FIG. 6C is a diagram showing an example in which a half-half pattern is used for correspondence between a plurality of SRIs and a plurality of repeated transmissions.
- the UE is designated with 6 as the number of repetitions, and repeatedly transmits the PUSCH using the first SRI and the second SRI.
- the UE performs PUSCH transmission using the first SRI in the first half (first three times) PUSCH transmission opportunity, and in the second half (successive three times) PUSCH transmission opportunity, the second SRI. PUSCH transmission using.
- the number of repetitions of PUSCH transmission, the number of SRIs, etc. shown in FIGS. 6A to 6C are merely examples, and are not limited thereto. Further, in the following drawings, the number of repetitions of PUSCH transmission, the number of code points / code point names of each field, the number of bits, the number of SRIs, etc. are merely examples, and are not limited to these examples.
- FIG. 7A is a diagram showing an example of repeated transmission of PUSCH for a single TRP according to the 2-1 embodiment.
- two SRI fields (SRI field # 1 and SRI field # 2) are set for the UE.
- the number of iterations specified for the UE is 4.
- the UE is instructed to SRS resource # 1 from the SRI field # 1 and the SRI field # 2, respectively. Since the SRS resource indicated in each of the two SRI fields is the same, the UE determines to repeatedly transmit the PUSCH in a single TRP.
- FIG. 7B is a diagram showing an example of repeated transmission of PUSCH for a plurality of TRPs according to the 2-1 embodiment.
- two SRI fields (SRI field # 1 and SRI field # 2) are set for the UE.
- the number of iterations specified for the UE is 4.
- the UE is instructed to SRS resource # 1 from the SRI field # 1 and SRS resource # 3 from the SRI field # 2. Since the SRS resource indicated in each of the two SRI fields is different, the UE determines to repeatedly transmit the PUSCH in the plurality of TRPs.
- the correspondence between the repeated transmission and the SRS resource shown in FIG. 7B is described by the above-mentioned cyclic correspondence, but is not limited to this.
- Embodiment 2-2 the UE performs either repetitive transmissions for a single TRP or repetitive transmissions for multiple TRPs, depending on whether a code point that does not apply is indicated in each of the plurality of SRI fields. You may decide that. The UE may assume that at most one "non-applicable code point" is indicated.
- the UE may repeat transmissions of multiple PUSCHs in the applied (valid) SRI. You may decide. In other words, when one valid SRS resource (SRI) is indicated in multiple SRI fields and one invalid SRI (eg reserved code point) is indicated, the UE repeats the PUSCH in a single TRP. You may decide to make a transmission.
- SRI SRS resource
- the UE may assume that when one reserved code point is instructed, the PUSCH for a single TRP is repeatedly transmitted. In this case, the UE may utilize the predefined SRI to repeatedly transmit PUSCH for a single TRP.
- the predefined SRI may be an SRI notified / set by higher layer signaling, or may be an SRI corresponding to a specific code point included in DCI.
- the specific code point may be the smallest (maximum) code point (for example, 00 in the case of 2 bits).
- the UE when the plurality of SRS resources (SRIs) are applied in a plurality of (for example, two) SRI fields, the UE can repeatedly transmit a plurality of PUSCHs in a plurality of SRIs (for example, a plurality of TRPs). It may be decided that it will be done. In other words, when the plurality of SRS resources (SRIs) are applied in the plurality of SRI fields, the UE may decide to repeatedly transmit the PUSCH in the plurality of TRPs.
- SRIs SRS resources
- the UE When the UE decides to perform repeated transmission of PUSCH in a plurality of TRPs, it may determine that the plurality of SRIs correspond to the plurality of repeated transmissions and cyclical transmission.
- the UE decides to perform repeated transmissions of PUSCHs in multiple TRPs, even if it is determined that the plurality of SRIs correspond to the plurality of repeated transmissions and a specific number (for example, two) sequentially. good.
- the UE When the UE decides to perform repeated transmission of PUSCH in multiple TRPs, it determines that the plurality of SRIs and the plurality of repeated transmissions continuously correspond to the number obtained by dividing the number of repetitions by the number of SRIs. You may.
- FIG. 8A is a diagram showing an example of repeated transmission of PUSCH for a single TRP according to the second embodiment.
- two SRI fields (SRI field # 1 and SRI field # 2) are set for the UE.
- the number of iterations specified for the UE is 4.
- the UE is instructed to SRS resource # 1 from the SRI field # 1, and the SRI that is “Not applied” is instructed from the SRI field # 2. Since the SRS resource specified in one SRI field is an SRI to which it is not applied, the UE determines to repeatedly transmit the PUSCH for a single TRP using the SRS resource # 1.
- FIG. 8B is a diagram showing an example of repeated transmission of PUSCH for a plurality of TRPs according to the second embodiment.
- two SRI fields (SRI field # 1 and SRI field # 2) are set for the UE.
- the number of iterations specified for the UE is 4.
- the UE is instructed to SRS resource # 1 from the SRI field # 1, and the SRS resource # 3 is instructed from the SRI field # 2. Since the SRS resource indicated in each of the two SRI fields is not an SRI to which the UE is not applied, the UE determines to repeatedly transmit the PUSCH in a plurality of TRPs.
- the correspondence between the repeated transmission and the SRS resource shown in FIG. 8B is described by the above-mentioned cyclic correspondence, but is not limited to this.
- FIG. 9 shows Rel. It is a figure which shows an example of the SRI field defined by 16. As shown in FIG. 9, for the UE, Rel. By using the reserved code points included in the SRI field defined by 16, the code points that do not apply may be indicated.
- the second embodiment may be assumed to be applicable when different SRI fields correspond to different SRS resource sets (SRS resource groups).
- Embodiment 2-3 the UE may decide to perform either repetitive transmissions for a single TRP or repetitive transmissions for multiple TRPs, based on the particular fields contained in the DCI.
- the UE may determine that repeated transmissions of multiple PUSCHs will take place in the SRI to which it applies. In other words, if the fields contained in the DCI indicate that one of the SRI fields be applied, the UE may decide to repeat the PUSCH in a single TRP. good.
- both the first SRI field and the second SRI field among a plurality of (for example, two) SRI fields (first SRI field, second SRI field).
- the UE may determine that repeated transmissions of a plurality of PUSCHs will occur in multiple SRIs (eg, multiple TRPs).
- the UE may decide to perform repeated transmissions of PUSCH in multiple TRPs.
- the UE When the UE decides to perform repeated transmission of PUSCH in a plurality of TRPs, it may determine that the plurality of SRIs correspond to the plurality of repeated transmissions and cyclical transmission.
- the UE decides to perform repeated transmissions of PUSCHs in multiple TRPs, even if it is determined that the plurality of SRIs correspond to the plurality of repeated transmissions and a specific number (for example, two) sequentially. good.
- the UE When the UE decides to perform repeated transmission of PUSCH in multiple TRPs, it determines that the plurality of SRIs and the plurality of repeated transmissions continuously correspond to the number obtained by dividing the number of repetitions by the number of SRIs. You may.
- the UE when the setting is performed using the upper layer signaling, the UE may assume that a specific field included in the DCI exists.
- FIG. 10 is a diagram showing an example of repeated transmission of PUSCH for a single TRP according to the second embodiment.
- two SRI fields (SRI field # 1 and SRI field # 2) are set for the UE.
- the number of iterations specified for the UE is 4.
- the UE is instructed to apply the SRS resource / SRS resource set corresponding to the SRI field # 1 and the SRI field # 1 by the fields included in the DCI. Further, the UE is instructed to SRS resource # 1 from the SRI field # 1, and is instructed to the SRS resource # 3 from the SRI field # 2.
- the UE determines to repeatedly transmit the PUSCH for a single TRP using the SRS resource # 1 by the field included in the DCI. At this time, the UE may ignore the instruction regarding the SRI field # 2.
- FIG. 11 is a diagram showing an example of repeated transmission of PUSCH for a plurality of TRPs according to the second embodiment.
- two SRI fields (SRI field # 1 and SRI field # 2) are set for the UE.
- the number of iterations specified for the UE is 4.
- the UE is instructed to apply the SRI field # 1 and the SRI field # 2 by the fields included in the DCI. Further, the UE is instructed to SRS resource # 1 from the SRI field # 1, and is instructed to the SRS resource # 3 from the SRI field # 2.
- the UE determines to repeatedly transmit the PUSCH for a plurality of TRPs using the SRS resource # 1 and the SRS resource # 3 by the fields included in the DCI.
- the correspondence between the repeated transmission and the SRS resource shown in FIG. 11 is described by the above-mentioned cyclic correspondence, but is not limited to this.
- the second and third embodiments may be assumed to be applicable when different SRI fields correspond to different SRS resource sets (SRS resource groups).
- TPMI / Transmit Power Control (TPC) commands / Phase Tracking Reference Signal (PTRS) -demodulation reference signal (DeModulation Reference Signal) are provided to the UE.
- TPC Transmit Power Control
- PTRS Phase Tracking Reference Signal
- DMRS DeModulation Reference Signal
- the UE applies to the SRI corresponding to the indicated TPMI / TPC command / PTRS-DMRS field. It may be determined that the SRI is not performed (modification example 2-2). That is, if the UE is instructed on a TPMI / TPC command / PTRS-DMRS field that does not apply, the UE may decide to send a PUSCH for a single TRP.
- the TPMI / TPC command / PTRS-DMRS field and SRI may have a one-to-one correspondence.
- the TPMI / TPC command / PTRS-DMRS field having the nth index may correspond to the SRI having the nth index.
- the UE may assume that at most one "non-applicable code point" is instructed.
- FIG. 12 is a diagram showing an example of the relationship between the TPMI field and the SRI field according to the modified example of the second embodiment.
- the SRI field # 1 corresponding to the TPMI field # 1 and the SRI field # 2 corresponding to the TPMI field # 2 are set for the UE.
- TPMI field # 1 indicates TPMI # 0, and TPMI field # 2 indicates TPMI which is "Not applied” to the UE.
- the UE determines that the SRI field # 1 corresponding to the designated TPMI field # 1 is valid for the valid TPMI, and applies the SRI field # 2 corresponding to the designated TPMI field # 2 for the TPMI that is not applied. You may decide not to. In this example, even if "00" is specified as the SRI field # 2, the UE does not apply the SRI (SRS resource # 3) corresponding to the SRI field # 2 to the repeated transmission of the PUSCH.
- the specific field included in the DCI may be a field for indicating either a single SRI field or a plurality of SRI fields (modification example 2-3).
- the UE may use the default SRI field.
- the default SRI field may be the SRI field having the smallest index / largest index / xth index (x is an integer), or the first / last / xth SRI field. It may be (Modified example 2-3-1).
- the UE when a single SRI field is indicated by a specific field included in the DCI, the UE is set quasi-statically by higher layer signaling (for example, RRC signaling / MAC CE).
- One of the updated SRI fields may be determined as the SRI field to be applied to the repeated transmission of the PUSCH (modification example 2-3-2).
- FIG. 13 is a diagram showing an example of repeated transmission of PUSCH for a single TRP according to Modification 2-3.
- two SRI fields (SRI field # 1 and SRI field # 2) are set for the UE.
- the number of iterations specified for the UE is 4.
- the UE is instructed to apply a single SRI by the fields included in DCI. Further, the UE is instructed to SRS resource # 1 from the SRI field # 1, and is instructed to the SRS resource # 3 from the SRI field # 2. Further, in the example shown in FIG. 13, the default SRI field is SRI field # 1. The UE determines that the fields contained in the DCI make repeated transmissions of PUSCH for a single TRP using SRS resource # 1, which is the default SRI field. At this time, the UE may ignore the instruction regarding the SRI field # 2.
- FIG. 14 is a diagram showing an example of repeated transmission of PUSCH for a plurality of TRPs according to Modification 2-3.
- two SRI fields (SRI field # 1 and SRI field # 2) are set for the UE.
- the number of iterations specified for the UE is 4.
- the UE is instructed to apply a plurality of SRI fields by the fields included in DCI. Further, the UE is instructed to SRS resource # 1 from the SRI field # 1, and is instructed to the SRS resource # 3 from the SRI field # 2.
- the UE determines to repeatedly transmit the PUSCH for a plurality of TRPs using the SRS resource # 1 and the SRS resource # 3 by the fields included in the DCI.
- the correspondence between the repeated transmission and the SRS resource shown in FIG. 14 is described by the above-mentioned cyclic correspondence, but is not limited to this.
- Embodiments 2-2 and 2-3 when a plurality of SRI fields and a plurality of TPMI / TPC commands / PTRS-DMRS fields are instructed, and the UE determines that the SRI fields are not applied. , The TPMI / TPC command / PTRS-DMRS field corresponding to the SRI may also be determined not to apply. At this time, the TPMI / TPC command / PTRS-DMRS field and SRI may have a one-to-one correspondence. For example, the TPMI / TPC command / PTRS-DMRS field having the nth index may correspond to the SRI having the nth index.
- a single PUSCH transmission and a repeated transmission of the PUSCH in a plurality of TRPs may be dynamically switched.
- a dynamic switch between single PUSCH transmission and repeated transmission of PUSCH in multiple TRPs may be supported.
- the repeated transmission in a plurality of TRPs is set to enable by the upper layer signaling (for example, RRC signaling / MAC CE), a specific number (for example, two) in one DCI.
- SRI fields may be included.
- the UE implements the following SRS resource (SRI) for performing a single PUSCH transmission. It may be determined by at least one of the methods described in embodiments 3-1 to 3-4.
- Embodiment 3-1 if the UE is instructed to send a single PUSCH, the UE assumes that a particular number (eg, two) of SRI fields points to the same SRS resource (SRI). You may.
- a particular number eg, two
- SRI SRS resource
- FIG. 15 is a diagram showing an example of a single PUSCH transmission according to the 3-1 embodiment.
- two SRI fields (SRI field # 1 and SRI field # 2) are set for the UE.
- the UE is instructed to SRS resource # 1 from the SRI field # 1 and the SRI field # 2, respectively.
- the UE decides to make a single PUSCH transmission because the SRS resources indicated in each of the two SRI fields are the same.
- Embodiment 3-2 if the UE is instructed to send a single PUSCH, the UE may assume that at least one non-applicable code point is instructed in each of the plurality of SRI fields. .. At this time, the UE may assume that at most one "non-applicable code point" is instructed.
- Rel. Reserved code points in the SRI field specified by 16 may be used.
- FIG. 16 is a diagram showing an example of a single PUSCH transmission according to the third embodiment.
- two SRI fields (SRI field # 1 and SRI field # 2) are set for the UE.
- the UE is instructed to SRS resource # 1 from the SRI field # 1, and the SRI that is “Not applied” is instructed from the SRI field # 2. Since the SRS resource indicated in one SRI field is an SRI that does not apply, the UE determines to perform a single PUSCH transmission using the SRS resource # 1.
- the third embodiment may be assumed to be applicable when different SRI fields correspond to different SRS resource sets (SRS resource groups).
- Embodiment 3-3 when the UE is instructed to transmit a single PUSCH, the UE may be instructed by a specific field included in the DCI which SRI field to use.
- the specific field included in the DCI is Rel. It may be a field introduced after 17, or Rel. Reserved code points of a specific field included in the DCI defined by 16 may be utilized.
- FIG. 17 is a diagram showing an example of a single PUSCH transmission according to the third embodiment.
- two SRI fields (SRI field # 1 and SRI field # 2) are set for the UE.
- the UE is instructed to apply the SRI field # 1 by the field included in the DCI. Further, the UE is instructed to SRS resource # 1 from the SRI field # 1, and is instructed to the SRS resource # 3 from the SRI field # 2. The UE determines that the fields contained in the DCI make a single PUSCH transmission using the SRS resource # 1, which is the default SRI field. At this time, the UE may ignore the instruction regarding the SRI field # 2.
- the third embodiment may be assumed to be applicable when different SRI fields correspond to different SRS resource sets (SRS resource groups).
- Embodiment 3-4 if the UE is instructed to make a single PUSCH transmission, the UE may make a single PUSCH transmission using the default SRI field.
- the default SRI field may be an SRI field having a minimum / maximum / xth index. Further, the default SRI field may be set / updated by higher layer signaling (for example, RRC signaling / MAC CE).
- the specific field included in the DCI is Rel. It may be a field introduced after 17, or Rel. Reserved code points of a specific field included in the DCI defined by 16 may be utilized.
- the SRI field other than the default SRI field, the TPMI field corresponding to the SRI field other than the default SRI field, and the TPC command field corresponding to the SRI field other than the default SRI field are provided. , UE can be ignored.
- FIG. 18 is a diagram showing an example of a single PUSCH transmission according to the third embodiment.
- two SRI fields (SRI field # 1 and SRI field # 2) are set for the UE.
- the UE is instructed by the SRS resource # 1 from the SRI field # 1 and the SRS resource # 3 from the SRI field # 2. Further, in the example shown in FIG. 18, the default SRI field is SRI field # 1. When a single PUSCH transmission is instructed to the UE, a single PUSCH transmission is performed using the SRI field # 1, which is the default SRI field. At this time, the UE may ignore the instruction regarding the SRI field # 2.
- the third embodiment may be assumed to be applicable when different SRI fields correspond to different SRS resource sets (SRS resource groups).
- Embodiment 3-2 for the UE, a plurality of TPMI / transmission power control (TPC) command / phase tracking reference signal (PTRS) -demodulation reference signal (DMRS) fields. Is instructed, and there may be a case where the plurality of TPMI / TPC command / PTRS-DMRS fields have a code point indicating a TPMI / TPC command / PTRS-DMRS field that is not applied.
- TPC transmission power control
- PTRS phase tracking reference signal
- DMRS demodulation reference signal
- the UE applies to the SRI corresponding to the indicated TPMI / TPC command / PTRS-DMRS field. It may be determined that the SRI is not performed (modification example 3-2). That is, if the UE is instructed on a TPMI / TPC command / PTRS-DMRS field that does not apply, the UE may decide to perform a single PUSCH transmission.
- the TPMI / TPC command / PTRS-DMRS field and SRI may have a one-to-one correspondence.
- the TPMI / TPC command / PTRS-DMRS field having the nth index may correspond to the SRI having the nth index.
- the UE may assume that at most one "non-applicable code point" is instructed.
- the UE may perform the control described in FIG.
- Embodiments 3-2, 3-3 and 3-4 when a plurality of SRI fields and a plurality of TPMI / TPC commands / PTRS-DMRS fields are instructed, the UE does not apply the SRI field. If it is determined, the TPMI / TPC command / PTRS-DMRS field corresponding to the SRI may also be determined not to be applied. At this time, the TPMI / TPC command / PTRS-DMRS field and SRI may have a one-to-one correspondence. For example, the TPMI / TPC command / PTRS-DMRS field having the nth index may correspond to the SRI having the nth index.
- a UE capability relating to a dynamic switch of PUSCH repetitive transmission for a single TRP / single PUSCH transmission and PUSCH repetitive transmission for a plurality of TRPs will be described.
- the UE may report (transmit) to the NW as to whether or not it has the capability.
- the UE capability for dynamic switching between repeated transmissions of PUSCHs for a single TRP / single PUSCH transmissions and repeated transmissions of PUSCHs for multiple TRPs is that of single PUSCH transmissions and PUSCHs for multiple TRPs. It may be defined as whether repeated transmissions and dynamic switches are supported.
- the UE capability for dynamic switching between repeated transmission of PUSCH for a single TRP / repeated transmission of a single PUSCH and repeated transmission of PUSCH for multiple TRPs is that of repeated transmission of PUSCH for a single TRP. It may be defined as whether repeated transmission of PUSCH for multiple TRPs and dynamic switching of are supported.
- the UE capability for dynamic switching between repeated transmissions of PUSCHs for a single TRP / single PUSCH transmissions and repeated transmissions of PUSCHs for multiple TRPs is the PUSCH for a single TRP relative to the first TRP. It may be defined as whether or not a dynamic switch of transmission / PUSCH repetitive transmission and PUSCH transmission / PUSCH repetitive transmission for a single TRP to a second TRP is supported.
- the UE capability for dynamic switching between repeated transmission of PUSCH for a single TRP / transmission of a single PUSCH and repeated transmission of PUSCH for multiple TRPs is a plurality of SRI / TPMI / TPC commands / PTRS-. It may be defined as whether the DMRS field is supported or not.
- the UE when the UE reports the UE capability corresponding to at least one of the above to the NW, and for the UE, the UE is set / activated by higher layer signaling for the at least one UE capability. / When instructed, it may be applied under at least one of the conditions.
- Each embodiment of the present disclosure may be applied to a UE when certain higher layer parameters are set / activated / instructed.
- 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. 19 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 wireless communication system 1 may support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs).
- MR-DC is a dual connectivity (E-UTRA-NR Dual Connectivity (EN-DC)) between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR, and a dual connectivity (NR-E) between NR and LTE.
- E-UTRA-NR Dual Connectivity Evolved Universal Terrestrial Radio Access (E-UTRA)
- NR-E 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 macrocell C1 having a relatively wide coverage, and a base station 12 (12a-12c) that is arranged in the macrocell C1 and forms a small cell C2 that is narrower than the macrocell 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 a 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 macrocell 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 FR 2 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 (for example, RRH) 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 compatible with 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.
- a downlink shared channel Physical Downlink Shared Channel (PDSCH)
- a broadcast channel Physical Broadcast Channel (PBCH)
- a downlink control channel Physical Downlink Control
- PDSCH Physical Downlink Control
- 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, or the like, and the DCI that schedules PUSCH may be called UL grant, UL DCI, or the like.
- the PDSCH may be read as DL data, and 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 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" to 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 reference signal for demodulation (DeModulation).
- CRS Cell-specific Reference Signal
- CSI-RS Channel State Information Reference Signal
- DMRS positioning reference signal
- 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. 20 is a diagram showing an example of the configuration of a base station according to an 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.
- the functional block of the characteristic portion in the present embodiment is mainly shown, 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 the common recognition in the technical field according to the present disclosure. be able to.
- the transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be 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 the 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. Processing (if necessary), inverse Fast Fourier Transform (IFFT) processing, precoding, transmission processing such as digital-analog transformation may be performed, and the baseband signal may be output.
- channel coding may include error correction coding
- modulation modulation
- mapping mapping, filtering
- DFT discrete Fourier Transform
- IFFT inverse Fast Fourier Transform
- precoding coding
- transmission processing such as digital-analog transformation
- 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) for 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, etc., and user data (user plane data) for the user terminal 20 and a control plane. 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 one downlink control information (Downlink Control Information (DCI)) for a plurality of uplink shared channels (Physical Uplink Shared Channel (PUSCH)).
- DCI Downlink Control Information
- PUSCH Physical Uplink Shared Channel
- the control unit 110 transmits a plurality of SRIs included in the DCI based on at least one of a plurality of first pieces of information indicating a sounding reference signal resource indicator (SRI).
- SRI sounding reference signal resource indicator
- the reception of the plurality of PUSCHs to be used or the plurality of PUSCHs using a single SRI may be controlled (second embodiment).
- the transmission / reception unit 120 may transmit one downlink control information (Downlink Control Information (DCI)) for one or more uplink shared channels (Physical Uplink Shared Channel (PUSCH)).
- DCI Downlink Control Information
- PUSCH Physical Uplink Shared Channel
- the control unit 110 transmits a plurality of SRIs included in the DCI based on at least one of a plurality of first pieces of information indicating a sounding reference signal resource indicator (SRI).
- SRI sounding reference signal resource indicator
- the reception of a single PUSCH using a plurality of PUSCHs or a single SRI may be controlled (third embodiment).
- FIG. 21 is a diagram showing an example of the configuration of a user terminal according to an 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.
- the functional block of the feature portion in the present embodiment is mainly shown, 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, 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 the 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 processes, for example, 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.
- 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 a 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 configured by at least one of the transmission / reception unit 220 and the transmission / reception antenna 230.
- the transmission / reception unit 220 may receive one downlink control information (DCI)) for a plurality of uplink shared channels (Physical Uplink Shared Channel (PUSCH)).
- DCI Downlink Control Information
- PUSCH Physical Uplink Shared Channel
- the control unit 210 uses a plurality of SRIs based on at least one of a plurality of first pieces of information that indicate a sounding reference signal resource indicator (SRI) included in the DCI.
- SRI sounding reference signal resource indicator
- the transmission of the plurality of PUSCHs using the PUSCH or a single SRI may be controlled (second embodiment).
- control unit 210 may control to transmit the plurality of PUSCHs using the single SRI (second embodiment).
- control unit 210 may control the transmission of the plurality of PUSCHs by the single SRI (the plurality of PUSCHs may be transmitted by the single SRI). Second embodiment).
- the DCI may contain a second piece of information instructing the application of multiple SRIs or a single SRI.
- the control unit 210 may control whether the plurality of SRIs are applied to the plurality of PUSCHs or the single SRI is applied to the plurality of PUSCHs based on the second information (second embodiment).
- the transmission / reception unit 220 may receive one downlink control information (Downlink Control Information (DCI)) for one or more uplink shared channels (Physical Uplink Shared Channel (PUSCH)).
- DCI Downlink Control Information
- PUSCH Physical Uplink Shared Channel
- the control unit 210 uses a plurality of SRIs based on at least one of a plurality of first pieces of information that indicate a sounding reference signal resource indicator (SRI) included in the DCI. Transmission of a single PUSCH using a PUSCH or a single SRI may be controlled (third embodiment).
- control unit 210 may control to transmit the single PUSCH (third embodiment).
- control unit 210 may control the transmission of the single PUSCH (third embodiment). ).
- the DCI may contain a second piece of information instructing the application of multiple SRIs or a single SRI.
- the control unit 210 may control whether to transmit the plurality of PUSCHs or to transmit the single PUSCH based on the second information (third embodiment).
- each functional block is realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , 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 (configuration unit) for functioning transmission may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
- the realization method 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. 22 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 in 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
- the processor 1001 operates, for example, an operating system to control the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU) including an interface with 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 disk (registered trademark) disk, an optical magnetic disk (for example, a compact disc (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, etc.). At least one of Blu-ray® discs, removable discs, optical disc drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers, and other suitable storage media. May be configured by.
- 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 has, 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 by 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 accepts 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 configured by one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) constituting the radio frame may be referred to as a subframe.
- 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 does not depend on 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 transmitter / receiver in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
- the slot may be composed of one or more symbols in the time area (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.). Further, the slot may be a time unit based on numerology.
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the slot may include a plurality of mini slots.
- Each minislot may be composed of one or more symbols in the time domain. Further, the mini-slot may 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 mini slot 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 use 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. 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.
- 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.
- TTI shorter than normal TTI may be referred to as shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, minislot, subslot, slot and the like.
- the long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms
- the short TTI eg, shortened TTI, etc.
- TTI having the above TTI length may be read as 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.
- PRB Physical RB
- SCG sub-carrier Group
- REG resource element group
- PRB pair an RB. It may be called a pair or the like.
- 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 radio frame the number of slots per subframe or radioframe, 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 an absolute value, a relative value from a predetermined value, or another corresponding information. It may be represented.
- the radio resource may be indicated by a predetermined 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. may be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.
- the notification of information is not limited to the embodiment / embodiment described in the present disclosure, and may be performed by using another method.
- 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 referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an 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, instructions, information, etc. may be transmitted and received via a transmission medium.
- the software uses at least one of wired technology (coaxial cable, optical fiber cable, twist pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.) on the website.
- wired technology coaxial cable, optical fiber cable, twist 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
- wireless base station fixed station
- NodeB NodeB
- eNB eNodeB
- gNB gNodeB
- Access point "Transmission point (Transmission Point (TP))
- Reception point 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 (eg, 3) cells.
- a base station accommodates multiple cells, the entire base station coverage area 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 a base station and a base station subsystem that provides 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, a mobile body itself, or the like.
- the moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) 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.
- communication between a base station and a user terminal has been replaced with communication between a plurality of user terminals (for example, it may be referred to as 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 a base station, 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 may be switched and used according to the 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 “determining” 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 connections or connections between two or more elements. Means, and can include the presence of one or more intermediate elements between two elements that are “connected” or “bonded” 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 region when two elements are connected, one or more wires, cables, printed electrical connections, etc. are used, and as some non-limiting and non-comprehensive examples, the radio frequency region, microwaves. It can be considered to be “connected” or “coupled” to each other using electromagnetic energy having wavelengths in the region, 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”.
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Abstract
Description
Rel.15では、データ送信において繰り返し送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う。あるいは、UEは、ULデータ(例えば、上り共有チャネル(PUSCH))の送信を所定回数だけ繰り返して行う。
・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、
・PUSCHの復調用参照信号(DMRS:Demodulation Reference Signal)の構成(configuration)、
・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))。
PUSCH送信に対して繰り返し送信タイプBを適用する場合、PUSCH送信に利用できないシンボル(又は、シンボルパターン)に関する情報をUEに通知することも検討されている。PUSCH送信に利用できないシンボルパターンは、無効シンボルパターン、Invalid symbol pattern、インバリッドシンボルパターン等と呼ばれてもよい。
繰り返し送信タイプBを適用してサブスロット単位で繰り返し送信が行われる場合、繰り返し係数(K)及びデータの割当て単位等によっては、ある繰り返し送信がスロット境界(slot-boundary)をクロス(cross)するケースが生じる。
Rel.15 NRにおいて、UEは、測定用参照信号(例えば、サウンディング参照信号(Sounding Reference Signal(SRS)))の送信に用いられる情報(SRS設定情報、例えば、RRC制御要素の「SRS-Config」内のパラメータ)を受信してもよい。
Rel.16において、コードブックベースのPUSCH送信のための、送信プリコーディング行列インジケータ(Transmitted Precoding Matrix Indicator(TPMI))及び送信ランクが、下りリンク制御情報(例えば、DCIフォーマット0_1)に含まれる特定のフィールド(例えば、プリコーディング情報及びレイヤ数フィールド)によって指定されることが検討されている。
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(図4参照)。
<第1の実施形態>
第1の実施形態では、単一のPUSCH送信/単一TRPにおけるPUSCHの繰り返し送信と、複数TRPにおけるPUSCHの繰り返し送信と、の動的なスイッチが行われなくてもよい。言い換えると、仕様上、単一のPUSCH送信/単一TRPにおけるPUSCHの繰り返し送信と、複数TRPにおけるPUSCHの繰り返し送信と、の動的なスイッチがサポートされなくてもよい。
第2の実施形態では、単一TRPにおけるPUSCHの繰り返し送信と、複数TRPにおけるPUSCHの繰り返し送信と、の動的なスイッチが行われてもよい。言い換えると、仕様上、単一TRPにおけるPUSCHの繰り返し送信と、複数TRPにおけるPUSCHの繰り返し送信と、の動的なスイッチがサポートされてもよい。
実施形態2-2:複数のSRIフィールドのそれぞれにおいて、適用されない(not appliedである)コードポイントが指示されるかに基づいて、単一TRP向けの繰り返し送信又は複数TRP向けの繰り返し送信のいずれかを行うことを決定する、
実施形態2-3:DCIに含まれる特定のフィールドに基づいて、単一TRP向けの繰り返し送信又は複数TRP向けの繰り返し送信のいずれかを行うことを決定する。
実施形態2-1において、UEは、特定の数(例えば、2つ)のSRIフィールドが、同じSRSリソース(SRI)を指示するか、異なるSRIを指示するか、のいずれかに基づいて、単一TRP向けの繰り返し送信又は複数TRP向けの繰り返し送信のいずれかを行うことを決定してもよい。
実施形態2-2において、UEは、複数のSRIフィールドのそれぞれにおいて、適用されないコードポイントが指示されるかに基づいて、単一TRP向けの繰り返し送信又は複数TRP向けの繰り返し送信のいずれかを行うことを決定してもよい。UEは、最大1つの「適用されないコードポイント」が指示されることを想定してもよい。
実施形態2-3において、UEは、DCIに含まれる特定のフィールドに基づいて、単一TRP向けの繰り返し送信又は複数TRP向けの繰り返し送信のいずれかを行うことを決定してもよい。
実施形態2-2において、UEに対し、複数のTPMI/送信電力制御(Transmit Power Control(TPC))コマンド/位相トラッキング参照信号(Phase Tracking Reference Signal(PTRS))-復調用参照信号(DeModulation Reference Signal(DMRS))フィールドが指示され、当該複数のTPMI/TPCコマンド/PTRS-DMRSフィールドに、適用しないTPMI/TPCコマンド/PTRS-DMRSフィールドを指示するコードポイントが存在するケースが考えられる。
第3の実施形態では、単一のPUSCH送信と、複数TRPにおけるPUSCHの繰り返し送信と、の動的なスイッチが行われてもよい。言い換えると、仕様上、単一のPUSCH送信と、複数TRPにおけるPUSCHの繰り返し送信と、の動的なスイッチがサポートされてもよい。
実施形態3-1において、UEに対し、単一のPUSCH送信が指示される場合、UEは、特定の数(例えば、2つ)のSRIフィールドが、同じSRSリソース(SRI)を指示すると想定してもよい。
実施形態3-2において、UEに対し、単一のPUSCH送信が指示される場合、UEは、複数のSRIフィールドのそれぞれにおいて、少なくとも1つの適用されないコードポイントが指示されると想定してもよい。このとき、UEは、最大1つの「適用されないコードポイント」が指示されることを想定してもよい。
実施形態3-3において、UEに対し、単一のPUSCH送信が指示される場合、UEは、いずれのSRIフィールドを用いるかを、DCIに含まれる特定のフィールドによって指示されてもよい。
実施形態3-4において、UEに対し、単一のPUSCH送信が指示される場合、UEは、デフォルトのSRIフィールドを使用して単一のPUSCH送信を行ってもよい。当該デフォルトのSRIフィールドは、最小/最大/x番目のインデックスを有するSRIフィールドであってもよい。また、当該デフォルトのSRIフィールドは、上位レイヤシグナリング(例えば、RRCシグナリング/MAC CE)によって設定/更新されてもよい。
実施形態3-2において、UEに対し、複数のTPMI/送信電力制御(TPC)コマンド/位相トラッキング参照信号(Phase Tracking Reference Signal(PTRS))-復調用参照信号(DeModulation Reference Signal(DMRS))フィールドが指示され、当該複数のTPMI/TPCコマンド/PTRS-DMRSフィールドに、適用しないTPMI/TPCコマンド/PTRS-DMRSフィールドを指示するコードポイントが存在するケースが考えられる。
第4の実施形態において、単一TRP向けのPUSCHの繰り返し送信/単一のPUSCH送信と、複数TRP向けのPUSCHの繰り返し送信と、の動的なスイッチに関するUE能力(UE capability)について説明する。UEは、当該能力を有するかに関して、NWに報告(送信)してもよい。
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20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21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)
- 複数の上りリンク共有チャネル(Physical Uplink Shared Channel(PUSCH))のための1つの下りリンク制御情報(Downlink Control Information(DCI))を受信する受信部と、
前記DCIに含まれる、サウンディング参照信号リソースインジケータ(Sounding Reference Signal Resource Indicator(SRI))を指示する複数の第1の情報の少なくとも1つに基づいて、複数のSRIを用いる前記複数のPUSCH又は単一のSRIを用いる前記複数のPUSCHの送信を制御する制御部と、を有する端末。 - 前記複数の第1の情報が同じSRIを指示する場合、前記制御部は、前記単一のSRIを用いる前記複数のPUSCHの送信を行うよう制御する請求項1に記載の端末。
- 前記複数の第1の情報の少なくとも1つに、適用不可能を示す指示が含まれる場合、前記制御部は、前記単一のSRIによる前記複数のPUSCHの送信を行うよう制御する請求項1に記載の端末。
- 前記DCIに複数のSRI又は単一のSRIの適用を指示する第2の情報が含まれ、前記制御部は、前記第2の情報に基づいて、前記複数のPUSCHに前記複数のSRIを適用するか前記単一のSRIを適用するかを制御する請求項1に記載の端末。
- 複数の上りリンク共有チャネル(Physical Uplink Shared Channel(PUSCH))のための1つの下りリンク制御情報(Downlink Control Information(DCI))を受信するステップと、
前記DCIに含まれる、サウンディング参照信号リソースインジケータ(Sounding Reference Signal Resource Indicator(SRI))を指示する複数の第1の情報の少なくとも1つに基づいて、複数のSRIを用いる前記複数のPUSCH又は単一のSRIを用いる前記複数のPUSCHの送信を制御するステップと、を有する端末の無線通信方法。 - 複数の上りリンク共有チャネル(Physical Uplink Shared Channel(PUSCH))のための1つの下りリンク制御情報(Downlink Control Information(DCI))を送信する送信部と、
前記DCIに含まれる、サウンディング参照信号リソースインジケータ(Sounding Reference Signal Resource Indicator(SRI))を指示する複数の第1の情報の少なくとも1つに基づいて送信される、複数のSRIを用いる前記複数のPUSCH又は単一のSRIを用いる前記複数のPUSCHの受信を制御する制御部と、を有する基地局。
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"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) |
QUALCOMM INCORPORATED: "Enhancements on Multi-TRP for PDCCH, PUCCH and PUSCH", 3GPP DRAFT; R1-2009251, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20201026 - 20201113, 24 October 2020 (2020-10-24), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051946914 * |
XIAOMI: "Enhancements on Multi-TRP for PDCCH, PUCCH and PUSCH", 3GPP DRAFT; R1-2009028, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20201026 - 20201113, 24 October 2020 (2020-10-24), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051946796 * |
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