WO2021171565A1 - 端末、無線通信方法及び基地局 - Google Patents
端末、無線通信方法及び基地局 Download PDFInfo
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- WO2021171565A1 WO2021171565A1 PCT/JP2020/008350 JP2020008350W WO2021171565A1 WO 2021171565 A1 WO2021171565 A1 WO 2021171565A1 JP 2020008350 W JP2020008350 W JP 2020008350W WO 2021171565 A1 WO2021171565 A1 WO 2021171565A1
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- transmission
- information
- pusch
- spatial relationship
- relationship information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
Definitions
- This disclosure relates to terminals, wireless communication methods and base stations in next-generation mobile communication systems.
- LTE Long Term Evolution
- 3GPP Rel.10-14 LTE-Advanced (3GPP Rel.10-14) has been specified for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).
- LTE Long Term Evolution
- 5G 5th generation mobile communication system
- 5G + plus
- NR New Radio
- 3GPP Rel.15 3GPP Rel.15 or later, etc.
- repeated transmission to the UL data channel (eg, 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 slots (for example, subslot units and minislot units).
- one of the purposes of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately control repeated transmission even when communication is performed using a plurality of TRPs.
- the terminal includes a receiving unit that receives at least one of the spatial relation information and the information regarding the repetition coefficient of the uplink shared channel, and a plurality of terminals to which the repeated transmission is applied when a plurality of the spatial relation information are set. It is characterized by having a control unit that controls to apply different spatial relationship information to the uplink shared channel.
- repeated transmission can be appropriately controlled even when communication is performed using a plurality of TRPs.
- FIGS. 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 multi-TRP.
- FIG. 5 is a diagram showing an example of PUSCH repetitive transmission control according to the first aspect.
- 6A and 6B are diagrams showing another example of PUSCH repetitive transmission control according to the first aspect.
- 7A and 7B are diagrams showing an example of PUSCH repetitive transmission control according to the second aspect.
- 8A and 8B are diagrams showing another example of PUSCH repetitive transmission control according to the second aspect.
- FIG. 9A and 9B are diagrams showing another example of PUSCH repetitive transmission control according to the second aspect.
- FIG. 10 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
- FIG. 11 is a diagram showing an example of the configuration of the base station according to the embodiment.
- FIG. 12 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
- FIG. 13 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, a downlink shared channel (PDSCH)) a predetermined number of times.
- DL data for example, a downlink shared channel (PDSCH)
- UL data for example, an 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 repeated transmission of a PUSCH dynamically scheduled by DCI (for example, a dynamic grant-based PUSCH), it may be applied to repeated transmission of a set grant-based PUSCH.
- the UE receives information indicating the repetition coefficient K (for example, aggregationFactorUL or aggregationFactorDL) quasi-statically by upper layer layer signaling.
- the upper layer signaling may be, for example, any one of RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information, or a combination thereof.
- MAC CE Control Element
- MAC PDU Protocol Data Unit
- the broadcast information may be, for example, a master information block (MIB: Master Information Block), a system information block (SIB: System Information Block), a minimum system information (RMSI: Remaining Minimum System Information), or the like.
- MIB Master Information Block
- SIB System Information Block
- RMSI Remaining Minimum System Information
- the UE receives at least one PDSCH reception process (eg, reception, demapping, demodulation, decoding) in K consecutive slots based on at least one of the following field values in the DCI (or the information indicated by that field value): 1), or control the PUSCH transmission process (eg, at least one of transmission, mapping, modulation, sign): -Assignment of time domain resources (eg start symbol, number of symbols in each slot, etc.), -Allocation of frequency domain resources (for example, a predetermined number of resource blocks (RB: Resource Block), a predetermined number of resource block groups (RBG: Resource Block Group)), -Modulation and Coding Scheme (MCS) index, • PUSCH demodulation reference signal (DMRS) configuration, -PUSCH spatial relation info (spatial relation info) or transmission configuration instruction (TCI: Transmission Configuration Indication or Transmission Configuration Indicator) state (TCI state (TCI-state)).
- DMRS PUSCH demodulation reference signal
- 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 (for example, the TDRA field).
- the redundant version (Redundancy Version (RV)) applied to the TB based on the same data may be the same, or at least a part thereof may be different. ..
- the RV applied to the TB in the nth slot (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" and "TDD-UL-DL-ConfigDedicated” of RRC IE) and If at least one symbol has a different communication direction from the UL, DL, or Flexible of each slot specified by at least one of the slot format identifiers (Slot format indicators) of DCI (for example, DCI format 2_0), the symbol is used.
- the resources of the included slot may not be transmitted (or received).
- 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 slots (for example, subslot units, minislot units, or predetermined number of symbols units) (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 transmits PUSCH in a predetermined slot (for example, StartSymbol and length) 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 repetition 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 repetitive transmission type A (for example, PUSCH repetition Type A), and the subslot-based repetitive transmission shown in FIG. 1B is called repetitive transmission type B (for example, PUSCH repetition Type B). ) May be called.
- 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 (for example, 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
- repetitive transmission type B eg, PUSCH-RepTypeB
- the UE is the first DCI.
- Repeated transmission type B is applied to PUSCH repeated transmissions scheduled in the format.
- the UE applies the UE repeatedly send type A for PUSCH repeats scheduled in the first DCI format. do.
- the repetitive transmission type B When the repetitive transmission type B is applied to the PUSCH transmission, it is also considered to notify the UE of information about a symbol (or symbol pattern) that cannot be used for the 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 invalid 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_2).
- 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) in the DCI is set by using the second upper layer parameter. That is, when the UE is notified of the information regarding the invalid symbol pattern by the first upper layer parameter, the UE may decide whether or not to apply the information regarding the invalid symbol pattern based on the second upper layer parameter and DCI. ..
- the UE may control the transmission of 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 DCI to add an additional bit (or a predetermined field) indicating whether or not to apply the invalid symbol pattern, 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 information that notifies 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 called nominal repetitions.
- Repeated transmissions that take into account 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).
- SRS resource set information for example, "SRS-ResourceSet” of RRC control element
- SRS resource information about one or more SRS resources
- Information for example, at least one of the RRC control elements "SRS-Resource" may be received.
- One SRS resource set may be associated with 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 Stent). 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
- SRS resource type for example, periodic SRS (Periodic SRS), semi-persistent Stent).
- 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 use may be used to determine a precoder for codebook-based or non-codebook-based PUSCH transmission based on SRI.
- the UE is for PUSCH transmission based on SRI, transmission rank indicator (Transmitted Rank Indicator (TRI)) and transmission precoding matrix indicator (Transmitted Precoding Matrix Indicator (TPMI)).
- Precoder 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).
- 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).
- SRS resource mapping for example, time and / or frequency resource position, resource offset, resource cycle, number of repetitions, SRS.
- the number of symbols, SRS bandwidth, etc. may be included.
- the SRS spatial relationship information may indicate the spatial relationship information between a 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 synchronous 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 uses 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).
- 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 relationship 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) within 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 codebook-based transmission is used for PUSCH, the UE may set two SRS resources by RRC and indicate one of the two SRS resources by DCI (1-bit SRI field). When using non-codebook-based transmission for PUSCH, the UE may have four SRS resources set by RRC and one of the four SRS resources indicated by DCI (2-bit SRI field). ..
- TRP Transmission / Reception Point
- multi-TRP perform DL transmission to the UE using one or more panels (multi-panel).
- the UE transmits UL to one or more TRPs (see FIG. 4).
- 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.
- the present inventors examined the control of PUSCH repetitive transmission in the multi-TRP and conceived the present embodiment.
- the panel Uplink (UL) transmission entity, TRP, spatial relationship, control resource set (COntrol REsource SET (CORESET)), PDSCH, code word, base station, predetermined antenna port (for example, reference for demodulation).
- Signal DeModulation Reference Signal (DMRS) port
- predetermined antenna port group for example, DMRS port group
- predetermined group for example, Code Division Multiplexing (CDM) group, predetermined reference signal group, CORESET group
- 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”.
- lists, groups, clusters, subsets, etc. may be read interchangeably.
- spatial relation information, SRI, SRS resource, precoder and the like may be read as each other.
- DCI format 0_0, DCI not including SRI, DCI not including spatial indication, and DCI not including CIF may be read as each other.
- DCI format 0_1, DCI including SRI, DCI including spatially related instructions, and DCI including CIF may be read interchangeably.
- the UE receives information regarding PUSCH transmission conditions from the network (for example, a base station).
- the information on the transmission conditions of the PUSCH includes information on the repeat transmission type of the PUSCH, information on the repetition coefficient, information on the allocation of the PUSCH, information on the spatial relationship (or recorder) used for the PUSCH transmission, and a redundant version used for the PUSCH transmission. It may be at least one of the information about the information and the information about the slot format.
- Information on PUSCH transmission conditions may be notified from the base station to the UE by at least one of downlink control information and higher layer signaling.
- Information on the PUSCH repetitive transmission type may be notified or set to the UE by higher layer signaling.
- the UE may apply the iterative transmission type A when the iterative transmission type B (for example, PUSCH-RepTypeB) is not set by the upper layer signaling.
- the repeat transmission type may be set for each DCI format (or PUSCH type).
- the type of PUSCH may include a dynamic grant-based PUSCH and a setting grant-based PUSCH.
- Information on repetition factors, information on PUSCH allocation, information on spatial relationships (or recorders) used for PUSCH transmission, and information on redundant versions used for PUSCH transmission can be found in DCI or a combination of DCI and higher layer parameters.
- the UE may be notified.
- a plurality of candidates may be defined in the table for information on the repetition coefficient (for example, K) and information on the allocation of PUSCH (for example, the start symbol S and the PUSCH length L), and a specific candidate may be selected by DCI.
- the repetition coefficient (K) of PUSCH is 4 will be described as an example, but the applicable repetition coefficient is not limited to 4.
- a plurality of candidates may be set by higher layer signaling, and one or more spatial relationship information may be activated by at least one of DCI and MAC CE.
- the UE controls to transmit the transport block (or PUSCH) using four transmission occasions (for example, transmission occasion) (see FIG. 5).
- Each PUSCH may be assigned to a transmission occasion set in a different slot (eg, a contiguous slot).
- Each transmission occasion (or each PUSCH repeat) may be associated with one spatial relationship.
- the same spatial relationship information may be set for a plurality of transmission occasions.
- the UE may apply the one spatial relationship information to each PUSCH iteration.
- different spatial relationship information may be set for a plurality of transmission occasions.
- the UE may apply different spatial relationship information to each PUSCH iteration when a plurality of spatial relationship information is notified from the base station by DCI and at least one of the upper layers.
- Each transmission occasion (or each PUSCH repeat) may be associated with one redundant version (RV).
- RV redundant version
- the same RV may be set for a plurality of transmission occasions.
- the UE may apply one RV to each PUSCH iteration when the base station notifies one RV by the DCI and at least one of the higher layers.
- the UE may apply a specific RV to the repetition of each PUSCH.
- different RVs may be set for a plurality of transmission occasions.
- the UE may apply different spatial relationship information to each PUSCH iteration when the base station notifies a plurality of RVs (eg, RV sets) by the DCI and at least one of the upper layers.
- RVs eg, RV sets
- a common modulation / coding scheme (Modulation and Coding Scheme (MCS)) may be applied to all transmission occasions (or PUSCH repetitions) set over K slots.
- MCS Modulation and Coding Scheme
- the MCS may be associated with the same single or multiple DMRS ports. For example, in FIG. 5, the UE may apply the same MCS to PUSCH repeated transmissions # 1 to # 4. Alternatively, different MCSs may be applied to multiple transmission occasions. In this case, the spatial relationship information and the MCS may be associated with each other.
- Each PUSCH repeated transmission may correspond to a predetermined TRP.
- the case corresponding to is shown.
- the TRP corresponding to each PUSCH repetition is not limited to this.
- the TRP and the spatial relationship information may be associated with each other. For example, when each PUSCH repeated transmission is transmitted to a different TRP, different spatial relationship information may be applied to each PUSCH repeated transmission. When a plurality of spatial relation information are set, the UE may determine the spatial relation information to be applied to each PUSCH repetitive transmission based on a predetermined rule.
- the UE applies different spatial relation information to a plurality of PUSCH repeated transmissions (or transmission occasions). May be good.
- the UE may apply at least one of the first mapping (for example, cyclic mapping) and the second mapping (for example, sequential mapping) for K repeated transmissions. good.
- a plurality of spatial relational information may be cyclically mapped to PUSCH repetition (for example, Rep # 1 to # 4).
- the 1st to Rth spatial relationship information may be applied to the 1st to Rth PUSCH repeated transmissions, respectively.
- the same spatial relation information (1 to R again) may be cyclically mapped to the remaining PUSCH repeat transmissions.
- FIG. 6A shows an example when the first mapping is used for PUSCH repeated transmission.
- the case where the spatial relationship information # 1 and the spatial relationship information # 2 are set as the two spatial relationship information is shown, but the index of the set spatial relationship information does not have to be a serial number. good.
- the PUSCH is appropriately set for each TRP even when the communication condition in a part of the time domain deteriorates. It becomes possible to send.
- a plurality of spatial relational information may be sequentially mapped to PUSCH repetitions (for example, Rep # 1 to # 4).
- FIG. 6B shows an example when the second mapping is used for PUSCH repeated transmission.
- the case where the spatial relationship information # 1 and the spatial relationship information # 2 are set as the two spatial relationship information is shown, but the index of the set spatial relationship information does not have to be a serial number. good.
- mapping each spatial relationship information so as to be continuous for PUSCH repeated transmission it is possible to suppress an increase in the number of UL beam (or spatial domain filter) switching in the UE.
- Whether the UE applies the first mapping or the second mapping may be predefined in the specification, or the base station notifies the UE using at least one of the upper layer signaling and DCI. May be good.
- the base station By switching and applying the first mapping and the second mapping, it is possible to flexibly control the repeated transmission of PUSCH according to the communication environment.
- the UE may apply the iterative transmission type B when the iterative transmission type B (for example, PUSCH-RepTypeB) is set by the upper layer signaling.
- the iterative transmission type B for example, PUSCH-RepTypeB
- repetition coefficient (K) of PUSCH is 4
- the applicable repetition coefficient is not limited to 4.
- the UE receives information regarding PUSCH transmission conditions from the network (for example, a base station).
- the information on the transmission conditions of the PUSCH includes information on the repeat transmission type of the PUSCH, information on the repetition coefficient, information on the allocation of the PUSCH, information on the spatial relationship (or recorder) used for the PUSCH transmission, and a redundant version used for the PUSCH transmission. It may be at least one of information about, slot format, and invalid symbol pattern.
- Information on PUSCH transmission conditions may be notified from the base station to the UE by at least one of downlink control information and higher layer signaling.
- Information on the PUSCH repetitive transmission type may be notified or set to the UE by higher layer signaling.
- the UE may apply the iterative transmission type B when the iterative transmission type B (for example, PUSCH-RepTypeB) is set by the upper layer signaling.
- the repeat transmission type may be set for each DCI format (or PUSCH type).
- Information on repetition factors, information on PUSCH allocation, information on spatial relationships (or recorders) used for PUSCH transmission, and information on redundant versions used for PUSCH transmission can be found in DCI or a combination of DCI and higher layer parameters.
- the UE may be notified.
- a plurality of candidates may be defined in the table for information on the repetition coefficient (for example, K) and information on the allocation of PUSCH (for example, the start symbol S and the PUSCH length L), and a specific candidate may be selected by DCI.
- the repetition coefficient (K) of PUSCH is 4 will be described as an example, but the applicable repetition coefficient is not limited to 4.
- a plurality of candidates may be set by higher layer signaling, and one or more spatial relationship information may be activated by at least one of DCI and MAC CE.
- the UE may determine at least one of the nominal repetitions and the actual repetitions based on the information on the slot format, the information on the invalid symbol pattern, and the like. For example, the UE may determine the division (or segmentation) of each PUSCH iteration in consideration of at least one of the DL symbol, the invalid symbol, and the slot boundary.
- the UE controls to transmit the transport block (or PUSCH) using four transmission occasions (for example, transmission occasion) (FIG. 7A, FIG. See FIG. 7B).
- FIG. 7A shows PUSCH repeated transmission of Nominal repetitions
- FIG. 7B shows PUSCH repeated transmission of Actual repetitions.
- FIG. 7A shows a case where Rep # 1 to Rep # 3 and a part of Rep # 4 are set in the same slot, and the rest of Rep # 4 is set in different slots. Further, it shows a case where some symbols of Rpe # 2 become DL or invalid symbols.
- a transmission occasion may be set for each divided PUSCH (for example, segment PUSCH).
- Each transmission occasion (or each PUSCH repeat) may be associated with one spatial relationship information.
- the same spatial relationship information may be set for a plurality of transmission occasions.
- the UE may apply the one spatial relationship information to each PUSCH iteration.
- different spatial relationship information may be set for a plurality of transmission occasions.
- the UE may apply different spatial relationship information to each PUSCH iteration when a plurality of spatial relationship information is notified from the base station by DCI and at least one of the upper layers.
- Each transmission occasion (or each PUSCH repeat) may be associated with one redundant version (RV).
- RV redundant version
- the same RV may be set for a plurality of transmission occasions.
- the UE may apply one RV to each PUSCH iteration when the base station notifies one RV by the DCI and at least one of the higher layers.
- the UE may apply a specific RV to the repetition of each PUSCH.
- different RVs may be set for a plurality of transmission occasions.
- the UE may apply different spatial relationship information to each PUSCH iteration when the base station notifies a plurality of RVs (eg, RV sets) by the DCI and at least one of the upper layers.
- RVs eg, RV sets
- a common modulation / coding scheme (Modulation and Coding Scheme (MCS)) may be applied to all transmission occasions (or PUSCH repetitions) set over K slots.
- MCS Modulation and Coding Scheme
- the MCS may be associated with the same single or multiple DMRS ports. Alternatively, different MCSs may be applied to multiple transmission occasions. In this case, the spatial relationship information and the MCS may be associated with each other.
- At least one of the spatial relation information, the redundant version, and the MCS may be applied for each PUSCH repeated transmission (Rep # 1, # 2, # 3, # 4) of Nominal repetitions.
- at least one of the spatial relation information, the redundant version, and the MCS is repeatedly transmitted by PUSCH of Actual repetitions (Rep # 1, # 2-1, # 2-2, # 3, # 4-1 and # 4-2). It may be applied on a case-by-case basis.
- Each PUSCH repeated transmission may correspond to a predetermined TRP.
- Rep # 1 and # 3 correspond to TRP # 1
- Rep # 2 and # 4 correspond to TRP # 2.
- Rep # 1, # 2-2, and # 4-1 correspond to TRP # 1
- Rep # 2-1, # 3, and # 4-2 correspond to TRP # 2. ..
- the TRP corresponding to each PUSCH repetition is not limited to this.
- the TRP and the spatial relationship information may be associated with each other. For example, when each PUSCH repeated transmission is transmitted to a different TRP, different spatial relationship information may be applied to each PUSCH repeated transmission. When a plurality of spatial relation information are set, the UE may determine the spatial relation information to be applied to each PUSCH repetitive transmission based on a predetermined rule.
- the UE applies different spatial relation information to a plurality of PUSCH repeated transmissions (or transmission occasions). May be good.
- the UE may apply at least one of the first mapping (for example, cyclic mapping) and the second mapping (for example, sequential mapping) for K repeated transmissions. good.
- a plurality of spatial relational information may be cyclically mapped to the PUSCH repetition.
- R spatial relationship information when R spatial relationship information is set, the 1st to Rth spatial relationship information may be applied to the 1st to Rth PUSCH repeated transmissions, respectively.
- K repetition coefficient
- the same spatial relation information (1 to R again) may be cyclically mapped to the remaining PUSCH repeat transmissions.
- the first mapping may be applied for each PUSCH repetitive transmission (Rep # 1, # 2, # 3, # 4) of Nominal repetitions (see FIG. 8A).
- the spatial relationship information may be applied for each PUSCH repeated transmission (Rep # 1, # 2-1, # 2-2, # 3, # 4-1 and # 4-2) of Actual repetitions (Fig.). See 8B).
- FIG. 8A shows an example when the first mapping is used for PUSCH repetitive transmission based on Nominal repetitions.
- the case where the spatial relationship information # 1 and the spatial relationship information # 2 are set as the two spatial relationship information is shown, but the index of the set spatial relationship information does not have to be a serial number. good.
- the spatial relationship information # 1 is mapped to Rep # 1, and the spatial relationship information # 2 is mapped to Rep # 2-1 and # 2-2 included in Rep # 2. Further, since R ⁇ K, the spatial relationship information # 1 is mapped to the remaining Rep # 3, and the spatial relationship information # 2 is mapped to Rep # 4-1 and # 4-2 included in Rep # 4. ..
- FIG. 8B shows an example when the first mapping is used for PUSCH repetitive transmission based on Actual repetitions.
- the UE may change the K notified from the base station based on the divided PUSCH to control the transmission.
- the spatial relationship information # 1 is mapped to Rep # 1, and the spatial relationship information # 2 is mapped to Rep # 2-1. Further, since R ⁇ K, the spatial relationship information # 1 is mapped to the remaining Rep # 2-2, the spatial relationship information # 2 is mapped to Rep # 3, and the spatial relationship information # 1 is mapped to Rep # 4-1. Is mapped, and spatial relationship information # 2 is mapped to Rep # 4-2.
- the PUSCH is appropriately set for each TRP even when the communication condition in a part of the time domain deteriorates. It becomes possible to send.
- a plurality of spatial relational information may be sequentially mapped to the PUSCH repetition.
- the second mapping may be applied for each PUSCH repetitive transmission (Rep # 1, # 2, # 3, # 4) of Nominal repetitions (see FIG. 9A).
- the spatial relationship information may be applied for each PUSCH repeated transmission (Rep # 1, # 2-1, # 2-2, # 3, # 4-1 and # 4-2) of Actual repetitions (Fig.). See 9B).
- FIG. 9A shows an example when the second mapping is used for PUSCH repetitive transmission based on Nominal repetitions.
- the case where the spatial relationship information # 1 and the spatial relationship information # 2 are set as the two spatial relationship information is shown, but the index of the set spatial relationship information does not have to be a serial number. good.
- the spatial relationship information # 1 is mapped to Rep # 2-1 and # 2-2 included in Rep # 1 and Rep # 2, and Rep # 4-1 and Rep # 4-1 included in Rep # 3 and Rep # 4 are mapped.
- Spatial relationship information # 2 is mapped to # 4-2.
- FIG. 9B shows an example when the second mapping is used for PUSCH repetitive transmission based on Actual repetitions.
- the case where the spatial relationship information # 1 and the spatial relationship information # 2 are set as the two spatial relationship information is shown, but the index of the set spatial relationship information does not have to be a serial number. good.
- the spatial relationship information # 1 is mapped to the first three repeated transmissions (Rep # 1, Rep # 2-1 and # 2-2), and the remaining three repeated transmissions (Rep # 3, Rep).
- Spatial relationship information # 2 is mapped to # 4-1 and # 4-2).
- mapping each spatial relationship information so as to be continuous for PUSCH repeated transmission it is possible to suppress an increase in the number of UL beam (or spatial domain filter) switching in the UE.
- Whether the UE applies the first mapping or the second mapping may be predefined in the specification, or the base station notifies the UE using at least one of the upper layer signaling and DCI. May be good.
- the base station By switching and applying the first mapping and the second mapping, it is possible to flexibly control the repeated transmission of PUSCH according to the communication environment.
- 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. 10 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
- the wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by Third Generation Partnership Project (3GPP). ..
- the radio communication system 1 may support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs).
- MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and dual connectivity between NR and LTE (NR-E).
- E-UTRA Evolved Universal Terrestrial Radio Access
- EN-DC E-UTRA-NR Dual Connectivity
- NE-DC -UTRA Dual Connectivity
- the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)).
- the base station (gNB) of NR is MN
- the base station (eNB) of LTE (E-UTRA) is SN.
- the wireless communication system 1 has dual connectivity between a plurality of base stations in the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )) May be supported.
- a plurality of base stations in the same RAT for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )
- NR-NR Dual Connectivity NR-DC
- gNB NR base stations
- the wireless communication system 1 includes a base station 11 that forms a macro cell C1 having a relatively wide coverage, and a base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. You may prepare.
- the user terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminal 20 are not limited to the mode shown in the figure.
- the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.
- the user terminal 20 may be connected to at least one of the plurality of base stations 10.
- the user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation (CA)) and dual connectivity (DC) using a plurality of component carriers (Component Carrier (CC)).
- CA Carrier Aggregation
- DC dual connectivity
- CC Component Carrier
- Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)).
- the macro cell C1 may be included in FR1 and the small cell C2 may be included in FR2.
- FR1 may be in a frequency band of 6 GHz or less (sub 6 GHz (sub-6 GHz)), and FR2 may be in a frequency band higher than 24 GHz (above-24 GHz).
- the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.
- the user terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- the plurality of base stations 10 may be connected by wire (for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication).
- wire for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.
- NR communication for example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 corresponding to the higher-level station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to a relay station (relay) is IAB. It may be called a node.
- IAB Integrated Access Backhaul
- relay station relay station
- the base station 10 may be connected to the core network 30 via another base station 10 or directly.
- the core network 30 may include at least one such as Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).
- EPC Evolved Packet Core
- 5GCN 5G Core Network
- NGC Next Generation Core
- the user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.
- a wireless access method based on Orthogonal Frequency Division Multiplexing may be used.
- OFDM Orthogonal Frequency Division Multiplexing
- DL Downlink
- UL Uplink
- CP-OFDM Cyclic Prefix OFDM
- DFT-s-OFDM Discrete Fourier Transform Spread OFDM
- OFDMA Orthogonal Frequency Division Multiple. Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the wireless access method may be called a waveform.
- another wireless access system for example, another single carrier transmission system, another multi-carrier transmission system
- the UL and DL wireless access systems may be used as the UL and DL wireless access systems.
- downlink shared channels Physical Downlink Shared Channel (PDSCH)
- broadcast channels Physical Broadcast Channel (PBCH)
- downlink control channels Physical Downlink Control
- Channel PDCCH
- the uplink shared channel Physical Uplink Shared Channel (PUSCH)
- the uplink control channel Physical Uplink Control Channel (PUCCH)
- the random access channel shared by each user terminal 20 are used.
- Physical Random Access Channel (PRACH) Physical Random Access Channel or the like may be used.
- PDSCH 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.
- MIB Master Information Block
- PBCH Master Information Block
- Lower layer control information may be transmitted by PDCCH.
- the lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of PDSCH and PUSCH.
- DCI Downlink Control Information
- the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc.
- the DCI that schedules PUSCH may be called UL grant, UL DCI, etc.
- the PDSCH may be read as DL data
- the PUSCH may be read as UL data.
- a control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used for PDCCH detection.
- CORESET corresponds to a resource for searching DCI.
- the search space corresponds to the search area and search method of PDCCH candidates (PDCCH candidates).
- One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a search space based on the search space settings.
- One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
- One or more search spaces may be referred to as a search space set.
- the "search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. of the present disclosure may be read as each other.
- channel state information (Channel State Information (CSI)
- delivery confirmation information for example, it may be called Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.
- scheduling request (Scheduling Request ( Uplink Control Information (UCI) including at least one of SR))
- the PRACH may transmit a random access preamble to establish a connection with the cell.
- downlinks, uplinks, etc. may be expressed without “links”. Further, it may be expressed without adding "Physical" at the beginning of various channels.
- a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like may be transmitted.
- the DL-RS includes a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a demodulation reference signal (DeModulation).
- CRS Cell-specific Reference Signal
- CSI-RS Channel State Information Reference Signal
- DeModulation Demodulation reference signal
- Reference Signal (DMRS)), positioning reference signal (Positioning Reference Signal (PRS)), phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like may be transmitted.
- PRS Positioning Reference Signal
- PTRS Phase Tracking Reference Signal
- the synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- the signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SS Block (SSB) and the like.
- SS, SSB and the like may also be called a reference signal.
- a measurement reference signal Sounding Reference Signal (SRS)
- a demodulation reference signal DMRS
- UL-RS Uplink Reference Signal
- UE-specific Reference Signal UE-specific Reference Signal
- FIG. 11 is a diagram showing an example of the configuration of the base station according to the embodiment.
- the base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140.
- the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may each be provided with one or more.
- this example mainly shows the functional blocks of the feature portion in the present embodiment, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
- the control unit 110 controls the entire base station 10.
- the control unit 110 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.
- the control unit 110 may control signal generation, scheduling (for example, resource allocation, mapping) and the like.
- the control unit 110 may control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
- the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 120.
- the control unit 110 may perform call processing (setting, release, etc.) of the communication channel, state management of the base station 10, management of radio resources, and the like.
- the transmission / reception unit 120 may include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123.
- the baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212.
- the transmission / reception unit 120 includes a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like, which are described based on common recognition in the technical fields according to the present disclosure. be able to.
- the transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.
- the transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122.
- the receiving unit may be composed of a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.
- the transmitting / receiving antenna 130 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.
- the transmission / reception unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmission / reception unit 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.
- the transmission / reception unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission / reception unit 120 processes, for example, Packet Data Convergence Protocol (PDCP) layer processing and Radio Link Control (RLC) layer processing (for example, RLC) for data, control information, etc. acquired from control unit 110.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- HARQ retransmission control HARQ retransmission control
- the transmission / reception unit 120 performs channel coding (may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) for the bit string to be transmitted.
- the base band signal may be output by performing processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, digital-analog conversion, and other transmission processing.
- IFFT inverse fast Fourier transform
- the transmission / reception unit 120 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 130. ..
- the transmission / reception unit 120 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 130.
- the transmission / reception unit 120 (reception processing unit 1212) performs analog-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. )) Processing (if necessary), filtering, demapping, demodulating, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing are applied. User data and the like may be acquired.
- FFT fast Fourier transform
- IDFT inverse discrete Fourier transform
- the transmission / reception unit 120 may perform measurement on the received signal.
- the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, or the like based on the received signal.
- the measuring unit 123 has received power (for example, Reference Signal Received Power (RSRP)) and reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)).
- RSRP Reference Signal Received Power
- RSSQ Reference Signal Received Quality
- SINR Signal to Noise Ratio
- Signal strength for example, Received Signal Strength Indicator (RSSI)
- propagation path information for example, CSI
- the measurement result may be output to the control unit 110.
- the transmission line interface 140 transmits / receives signals (backhaul signaling) to / from a device included in the core network 30, another base station 10 and the like, and provides user data (user plane data) and control plane for the user terminal 20. Data or the like may be acquired or transmitted.
- the transmission unit and the reception unit of the base station 10 in the present disclosure may be composed of at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
- the transmission / reception unit 120 may transmit at least one of the spatial relation information of the uplink shared channel and the information regarding the repetition coefficient.
- control unit 110 may control reception of a plurality of uplink shared channels to which different spatial relation information is applied (for example, reception processing in each TRP).
- FIG. 12 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
- the user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230.
- the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided with one or more.
- this example mainly shows the functional blocks of the feature portion in the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
- the control unit 210 controls the entire user terminal 20.
- the control unit 210 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.
- the control unit 210 may control signal generation, mapping, and the like.
- the control unit 210 may control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230.
- the control unit 210 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 220.
- the transmission / reception unit 220 may include a baseband unit 221 and an RF unit 222, and a measurement unit 223.
- the baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212.
- the transmission / reception unit 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like, which are described based on the common recognition in the technical field according to the present disclosure.
- the transmission / reception unit 220 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.
- the transmission unit may be composed of a transmission processing unit 2211 and an RF unit 222.
- the receiving unit may be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.
- the transmitting / receiving antenna 230 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.
- the transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.
- the transmission / reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission / reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), and MAC layer processing (for example, for data, control information, etc. acquired from the control unit 210). , HARQ retransmission control), etc., to generate a bit string to be transmitted.
- RLC layer processing for example, RLC retransmission control
- MAC layer processing for example, for data, control information, etc. acquired from the control unit 210.
- HARQ retransmission control HARQ retransmission control
- the transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (may include error correction coding), modulation, mapping, filtering processing, DFT processing (if necessary), and IFFT processing for the bit string to be transmitted. , Precoding, digital-to-analog conversion, and other transmission processing may be performed to output the baseband signal.
- Whether or not to apply the DFT process may be based on the transform precoding setting.
- the transmission / reception unit 220 transmits the channel using the DFT-s-OFDM waveform.
- the DFT process may be performed as the transmission process, and if not, the DFT process may not be performed as the transmission process.
- the transmission / reception unit 220 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 230. ..
- the transmission / reception unit 220 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 230.
- the transmission / reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, and decoding (error correction) for the acquired baseband signal. Decoding may be included), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
- the transmission / reception unit 220 may perform measurement on the received signal.
- the measuring unit 223 may perform RRM measurement, CSI measurement, or the like based on the received signal.
- the measuring unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like.
- the measurement result may be output to the control unit 210.
- the transmitter and receiver of the user terminal 20 in the present disclosure may be composed of at least one of the transmitter / receiver 220 and the transmitter / receiver antenna 230.
- the control unit 210 uses at least one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, and downlink control information (DCI) to provide uplinks to a plurality of transmission / reception points.
- RRC Radio Resource Control
- MAC Medium Access Control
- DCI downlink control information
- Spatial relationship information for a shared channel Physical Uplink Shared Channel (PUSCH) may be determined.
- the transmission / reception unit 220 may receive at least one of the spatial relation information of the uplink shared channel and the information regarding the repetition coefficient.
- the spatial relationship information and the spatial relationship may be read as each other.
- control unit 210 may control to apply different spatial relation information to a plurality of uplink shared channels to which repeated transmission is applied.
- control unit 210 may circulate and apply the different spatial relationship information to a plurality of uplink shared channels (cyclic mapping).
- the control unit 210 may apply the same spatial relationship information to at least a part of the plurality of uplink shared channels that are continuously transmitted (sequential mapping).
- control unit 210 when the repeat transmission of the uplink shared channel is performed in units shorter than the slot, the control unit 210 provides spatial relationship information for each uplink shared channel transmission divided based on a symbol or slot boundary that cannot be used for uplink shared channel transmission. It may be controlled to apply.
- each functional block is realized by using one physically or logically connected device, or directly or indirectly (for example, two or more physically or logically separated devices). , Wired, wireless, etc.) and may be realized using these plurality of devices.
- the functional block may be realized by combining the software with the one device or the plurality of devices.
- the functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
- a functional block (constituent unit) for functioning transmission may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
- the method of realizing each of them is not particularly limited.
- the base station, user terminal, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
- FIG. 13 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
- the base station 10 and the user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. ..
- the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
- processor 1001 may be a plurality of processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or by using other methods by two or more processors.
- the processor 1001 may be mounted by one or more chips.
- the processor 1001 For each function of the base station 10 and the user terminal 20, for example, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation and communicates via the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
- predetermined software program
- Processor 1001 operates, for example, an operating system to control the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like.
- CPU central processing unit
- control unit 110 210
- transmission / reception unit 120 220
- the like may be realized by the processor 1001.
- the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
- a program program code
- the control unit 110 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized in the same manner for other functional blocks.
- the memory 1002 is a computer-readable recording medium, such as at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EPROM), a Random Access Memory (RAM), or any other suitable storage medium. It may be composed of one.
- the memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
- the memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the wireless communication method according to the embodiment of the present disclosure.
- the storage 1003 is a computer-readable recording medium, and is, for example, a flexible disk, a floppy (registered trademark) disk, an optical magnetic disk (for example, a compact disc (Compact Disc ROM (CD-ROM)), a digital versatile disk, etc.). At least one of Blu-ray® disks, removable disks, optical disc drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers, and other suitable storage media. It may be composed of.
- the storage 1003 may be referred to as an auxiliary storage device.
- the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)). May be configured to include.
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the transmission / reception unit 120 (220), the transmission / reception antenna 130 (230), and the like described above may be realized by the communication device 1004.
- the transmission / reception unit 120 (220) may be physically or logically separated from the transmission unit 120a (220a) and the reception unit 120b (220b).
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside.
- the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
- each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information.
- the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
- the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (Digital Signal Processor (DSP)), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like. It may be configured to include hardware, and a part or all of each functional block may be realized by using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
- DSP Digital Signal Processor
- ASIC Application Specific Integrated Circuit
- PLD Programmable Logic Device
- FPGA Field Programmable Gate Array
- the terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings.
- channels, symbols and signals may be read interchangeably.
- the signal may be a message.
- the reference signal may be abbreviated as RS, and may be referred to as a pilot, a pilot signal, or the like depending on the applied standard.
- the component carrier Component Carrier (CC)
- CC Component Carrier
- the wireless frame may be composed of one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) constituting the wireless frame may be referred to as a subframe.
- the subframe may be composed of one or more slots in the time domain.
- the subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.
- the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel.
- Numerology includes, for example, subcarrier spacing (SubCarrier Spacing (SCS)), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval (TTI)), number of symbols per TTI, and wireless frame configuration.
- SCS subcarrier Spacing
- TTI Transmission Time Interval
- a specific filtering process performed by the 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 domain (Orthogonal Frequency Division Multiple Access (OFDMA) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.).
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the slot may be a time unit based on numerology.
- the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain.
- the mini-slot may also be referred to as a sub-slot.
- a minislot may consist of a smaller number of symbols than the slot.
- a PDSCH (or PUSCH) transmitted in a time unit larger than the minislot may be referred to as a PDSCH (PUSCH) mapping type A.
- the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.
- the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
- the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
- the time units such as frames, subframes, slots, mini slots, and symbols in the present disclosure may be read as each other.
- one subframe may be called TTI
- a plurality of consecutive subframes may be called TTI
- one slot or one minislot may be called TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be.
- the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
- the base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units.
- the definition of TTI is not limited to this.
- the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
- the time interval for example, the number of symbols
- the transport block, code block, code word, etc. may be shorter than the TTI.
- one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
- a TTI shorter than a normal TTI may be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, or the like.
- the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
- a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
- the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
- the number of subcarriers contained in the RB may be determined based on numerology.
- the RB may include one or more symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe or 1 TTI.
- Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
- One or more RBs are a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, and an RB. It may be called a pair or the like.
- Physical RB Physical RB (PRB)
- SCG sub-carrier Group
- REG resource element group
- the resource block may be composed of one or a plurality of resource elements (Resource Element (RE)).
- RE Resource Element
- 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
- Bandwidth Part (which may also be called partial bandwidth) represents a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. May be good.
- the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- the BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
- BWP UL BWP
- BWP for DL DL BWP
- One or more BWPs may be set in one carrier for the UE.
- At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given channel / signal outside the active BWP.
- “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
- the above-mentioned structures such as wireless frames, subframes, slots, mini slots, and symbols are merely examples.
- the number of subframes contained in a wireless frame the number of slots per subframe or wireless frame, the number of minislots contained in a slot, the number of symbols and RBs contained in a slot or minislot, and included in the RB.
- the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
- the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, radio resources may be indicated by a given index.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
- information, signals, etc. can be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layers.
- Information, signals, etc. may be input / output via a plurality of network nodes.
- Input / output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information, signals, etc. can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to another device.
- the notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using other methods.
- the notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (DCI)), uplink control information (Uplink Control Information (UCI))), and higher layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals or combinations thereof May be carried out by.
- DCI downlink control information
- UCI Uplink Control Information
- RRC Radio Resource Control
- MIB Master Information Block
- SIB System Information Block
- MAC Medium Access Control
- the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like.
- the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
- MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).
- CE MAC Control Element
- the notification of predetermined information is not limited to the explicit notification, but implicitly (for example, by not notifying the predetermined information or another information). May be done (by notification of).
- the determination may be made by a value represented by 1 bit (0 or 1), or by a boolean value represented by true or false. , May be done by numerical comparison (eg, comparison with a given value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
- Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- a transmission medium For example, a website where software uses at least one of wired technology (coaxial cable, fiber optic cable, twist pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.).
- wired technology coaxial cable, fiber optic 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
- radio base station fixed station
- NodeB NodeB
- eNB eNodeB
- gNB gNodeB
- Access point "Transmission point (Transmission Point (TP))
- RP Reception point
- TRP Transmission / Reception Point
- Panel , "Cell”, “sector”, “cell group”, “carrier”, “component carrier” and the like
- Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
- the base station can accommodate one or more (for example, three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio)).
- Communication services can also be provided by Head (RRH))).
- RRH Head
- the term "cell” or “sector” refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage.
- MS mobile station
- UE user equipment
- terminal terminal
- Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , Handset, user agent, mobile client, client or some other suitable term.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like.
- At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
- the moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be.
- at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
- at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read by the user terminal.
- the communication between the base station and the user terminal is replaced with the communication between a plurality of user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
- D2D Device-to-Device
- V2X Vehicle-to-Everything
- Each aspect / embodiment of the present disclosure may be applied to the configuration.
- the user terminal 20 may have the function of the base station 10 described above.
- words such as "up” and “down” may be read as words corresponding to communication between terminals (for example, "side”).
- the upstream channel, the downstream channel, and the like may be read as a side channel.
- the user terminal in the present disclosure may be read as a base station.
- the base station 10 may have the functions of the user terminal 20 described above.
- the operation performed by the base station may be performed by its upper node (upper node) in some cases.
- various operations performed for communication with a terminal are performed by the base station and one or more network nodes other than the base station (for example,).
- Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. can be considered, but it is not limited to these), or it is clear that it can be performed by a combination thereof.
- each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- SUPER 3G IMT-Advanced
- 4G 4th generation mobile communication system
- 5G 5th generation mobile communication system
- 6G 6th generation mobile communication system
- xG xG (xG (x is, for example, integer, fraction)
- Future Radio Access FAA
- RAT New -Radio Access Technology
- NR New Radio
- NX New radio access
- FX Future generation radio access
- GSM registered trademark
- CDMA2000 Code Division Multiple Access
- UMB Ultra Mobile Broadband
- LTE 802.11 Wi-Fi®
- LTE 802.16 WiMAX®
- LTE 802.20 Ultra-WideBand (UWB), Bluetooth®, and other suitable radios. It may be applied to a system using a communication method, a next-generation system extended based on these, and the like.
- UMB Ultra-WideBand
- references to elements using designations such as “first”, “second”, etc. as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted or that the first element must somehow precede the second element.
- determining used in this disclosure may include a wide variety of actions.
- judgment (decision) means judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry) ( For example, searching in a table, database or another data structure), ascertaining, etc. may be considered to be "judgment”.
- judgment (decision) includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access (for example). It may be regarded as “judgment (decision)” such as “accessing” (for example, accessing data in memory).
- judgment (decision) is regarded as “judgment (decision)” of solving, selecting, selecting, establishing, comparing, and the like. May be good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of some action.
- connection are any direct or indirect 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 “joined” to each other.
- the connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
- the radio frequency domain microwaves. It can be considered to be “connected” or “coupled” to each other using frequency, electromagnetic energy having wavelengths in the light (both visible and invisible) regions, and the like.
- the term "A and B are different” may mean “A and B are different from each other”.
- the term may mean that "A and B are different from C”.
- Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
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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))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。
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の態様では、1以上のTRPを利用して通信を行うUEが、スロットベースのPUSCHの繰り返し送信(繰り返し送信タイプA)を適用する場合の通信制御の一例について説明する。
上述したように、UEに設定される空間関係情報の数(例えば、R)が複数ある場合、UEは、複数のPUSCH繰り返し送信(又は、送信オケージョン)に対して異なる空間関係情報を適用してもよい。空間関係情報の数が複数ある場合、UEは、K回の繰り返し送信に対して第1のマッピング(例えば、cyclic mapping)及び第2のマッピング(例えば、sequential mapping)の少なくとも一方を適用してもよい。
PUSCH繰り返し(例えば、Rep#1~#4)に対して、複数の空間関係情報が循環(cyclic)してマッピングされてもよい。例えば、R個の空間関係情報が設定される場合、1~R番目の空間関係情報がそれぞれ1~R番目のPUSCH繰り返し送信に適用されてもよい。空間関係情報の数(R)が繰り返し係数(K)より少ない場合、残りのPUSCH繰り返し送信に対して同じ空間関係情報(再度1~R)が循環してマッピングされてもよい。
PUSCH繰り返し(例えば、Rep#1~#4)に対して、複数の空間関係情報が連続(sequential)してマッピングされてもよい。例えば、R個の空間関係情報が設定される場合、r(r=1...,R-1)番目の空間関係情報が[(r-1)K/R+1]番目から(rK/R)番目のPUSCH繰り返し送信に適用され、R番目の空間関係情報が[(R-1)K/R+1]番目からK番目のPUSCH繰り返し送信に適用されてもよい。
第2の態様では、1以上のTRPを利用して通信を行うUEが、サブスロットベースのPUSCHの繰り返し送信(繰り返し送信タイプB)を適用する場合の通信制御の一例について説明する。
上述したように、UEに設定される空間関係情報の数(例えば、R)が複数ある場合、UEは、複数のPUSCH繰り返し送信(又は、送信オケージョン)に対して異なる空間関係情報を適用してもよい。空間関係情報の数が複数ある場合、UEは、K回の繰り返し送信に対して第1のマッピング(例えば、cyclic mapping)及び第2のマッピング(例えば、sequential mapping)の少なくとも一方を適用してもよい。
PUSCH繰り返しに対して、複数の空間関係情報が循環(cyclic)してマッピングされてもよい。例えば、R個の空間関係情報が設定される場合、1~R番目の空間関係情報がそれぞれ1~R番目のPUSCH繰り返し送信に適用されてもよい。空間関係情報の数(R)が繰り返し係数(K)より少ない場合、残りのPUSCH繰り返し送信に対して同じ空間関係情報(再度1~R)が循環してマッピングされてもよい。
PUSCH繰り返しに対して、複数の空間関係情報が連続(sequential)してマッピングされてもよい。例えば、R個の空間関係情報が設定される場合、r(r=1...,R-1)番目の空間関係情報が[(r-1)K/R+1]番目から(rK/R)番目のPUSCH繰り返し送信に適用され、R番目の空間関係情報が[(R-1)K/R+1]番目からK番目のPUSCH繰り返し送信に適用されてもよい。
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11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12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)
- 上り共有チャネルの空間関係情報及び繰り返し係数に関する情報の少なくとも一つを受信する受信部と、
前記空間関係情報が複数設定される場合、繰り返し送信を適用する複数の上り共有チャネルに対して異なる空間関係情報を適用するように制御する制御部と、を有することを特徴とする端末。 - 前記制御部は、前記複数の上り共有チャネルに対して前記異なる空間関係情報を循環させて適用することを特徴とする請求項1に記載の端末。
- 前記制御部は、前記複数の上り共有チャネルのうち少なくとも一部の連続して送信される上り共有チャネルに対して同じ空間関係情報を適用することを特徴とする請求項1に記載の端末。
- 前記上り共有チャネルの繰り返し送信をスロットより短い単位で行う場合、前記制御部は、前記上り共有チャネルの送信に利用できないシンボル又はスロット境界に基づいて分割された上り共有チャネル送信毎に前記空間関係情報を適用することを特徴とする請求項1から請求項3のいずれかに記載の端末。
- 上り共有チャネルの空間関係情報及び繰り返し係数に関する情報の少なくとも一つを受信する工程と、
前記空間関係情報が複数設定される場合、繰り返し送信を適用する複数の上り共有チャネルに対して異なる空間関係情報を適用するように制御する工程と、を有することを特徴とする端末の無線通信方法。 - 上り共有チャネルの空間関係情報及び繰り返し係数に関する情報の少なくとも一つを送信する送信部と、
前記空間関係情報を複数設定する場合、異なる空間関係情報が適用される複数の上り共有チャネルの受信を制御する制御部と、を有することを特徴とする基地局。
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| PCT/JP2020/008350 WO2021171565A1 (ja) | 2020-02-28 | 2020-02-28 | 端末、無線通信方法及び基地局 |
| EP20922116.7A EP4114114A4 (en) | 2020-02-28 | 2020-02-28 | TERMINAL DEVICE, RADIO COMMUNICATION METHOD AND BASE STATION |
| CN202080097734.XA CN115191140B (zh) | 2020-02-28 | 2020-02-28 | 终端、无线通信方法以及基站 |
| US17/796,994 US20230059757A1 (en) | 2020-02-28 | 2020-02-28 | Terminal, radio communication method, and base station |
| JP2022502783A JP7589221B2 (ja) | 2020-02-28 | 2020-02-28 | 端末、無線通信方法、基地局及びシステム |
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| WO2022026788A1 (en) * | 2020-07-30 | 2022-02-03 | Ofinno, Llc | Frequency hopping in multiple transmission and reception points |
| US12256369B2 (en) * | 2020-08-05 | 2025-03-18 | Apple Inc. | Transmission of nominal repetitions of data over an unlicensed spectrum |
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| EP3493444B1 (en) * | 2012-01-17 | 2021-07-14 | LG Electronics Inc. | Method and apparatus for receiving uplink control information in wireless communication system |
| US10548096B2 (en) * | 2017-04-21 | 2020-01-28 | Samsung Electronics Co., Ltd. | Information type multiplexing and power control |
| US11128511B2 (en) * | 2017-04-27 | 2021-09-21 | Sharp Kabushiki Kaisha | Base station apparatus, terminal apparatus, communication method, and integrated circuit |
| US11115242B2 (en) * | 2018-04-13 | 2021-09-07 | Qualcomm Incorporated | Uplink multi-beam operation |
| WO2019244207A1 (ja) * | 2018-06-18 | 2019-12-26 | 株式会社Nttドコモ | ユーザ端末及び無線通信方法 |
| CN110535580B (zh) * | 2018-08-08 | 2022-08-23 | 中兴通讯股份有限公司 | 传输控制方法、探测参考信号传输方法、终端、基站及介质 |
| US20210203397A1 (en) * | 2020-02-13 | 2021-07-01 | Intel Corporation | Systems and methods for multiple-beam uplink transmission |
| EP4104330B1 (en) * | 2020-02-13 | 2025-04-09 | Telefonaktiebolaget LM Ericsson (publ) | Pusch reliability enhancements with multiple trps |
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| CN115191140A (zh) | 2022-10-14 |
| EP4114114A4 (en) | 2023-10-25 |
| CN115191140B (zh) | 2025-06-03 |
| JPWO2021171565A1 (ja) | 2021-09-02 |
| JP7589221B2 (ja) | 2024-11-25 |
| US20230059757A1 (en) | 2023-02-23 |
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