WO2022168812A1 - 端末、無線通信方法及び基地局 - Google Patents
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- H—ELECTRICITY
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- 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
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Definitions
- the present 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 successor systems for example, 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later
- 5G 5th generation mobile communication system
- 5G+ 5th generation mobile communication system
- 6G 6th generation mobile communication system
- NR New Radio
- 3GPP Rel. 15 supports repeated transmissions on UL data channels (eg, Physical Uplink Shared Channel (PUSCH)).
- PUSCH Physical Uplink Shared Channel
- the UE controls PUSCH transmission over a plurality of slots (eg, K consecutive slots) based on a repetition factor K set by the network (eg, base station). That is, when performing repeated transmission, each PUSCH is transmitted in different slots (for example, in slot units).
- K Physical Uplink Shared Channel
- each PUSCH is transmitted in units shorter than a slot (eg, subslot units, minislot units).
- TRP transmission/reception points
- one object of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately control repeated PUSCH transmission.
- a terminal includes a Sounding Reference Signal Resource Indicator (SRI) applied to the first PUSCH among a plurality of physical uplink shared channels (PUSCH). ) and determines the order of SRIs to be applied to each PUSCH, and a transmitter for transmitting the plurality of PUSCHs.
- SRI Sounding Reference Signal Resource Indicator
- FIG. 1A and 1B are diagrams illustrating an example of repeated transmission of PUSCH.
- 2A and 2B are diagrams showing examples of invalid symbol patterns.
- 3A and 3B are diagrams showing an example of nominal repetitions and actual repetitions.
- FIG. 4 is a diagram illustrating an example of repeated transmission of PUSCH in multi-TRP.
- 5A-5C are diagrams illustrating an example of a single PUSCH transmission, repeated PUSCH transmissions for a single TRP, and repeated PUSCH transmissions for multiple TRPs.
- 6A and 6B illustrate an example of repeated transmission of PUSCH for single and multiple TRPs according to Option 1.
- FIG. FIG. 7 is a diagram illustrating an example of repeated transmission of PUSCH for a single TRP according to Option 2. In FIG. FIG. FIG.
- FIG. 8 is a diagram illustrating an example of repeated transmission of PUSCH for multiple TRPs according to Option 2.
- FIG. 9A to 9C are diagrams showing an example of correspondence between multiple SRIs and multiple repeated transmissions.
- 10A and 10B are diagrams showing an example of the order of multiple TRPs.
- FIG. 11 is a diagram showing an example of the order of multiple SRI fields according to the embodiment 1-1.
- 12A and 12B are diagrams showing an example of the order of multiple SRI fields according to the embodiment 1-2.
- FIG. 13 is a diagram showing an example of the order of multiple TRPs according to the modification of the first embodiment.
- FIG. 14 is a diagram showing an example of a DCI field used to indicate the order of multiple SRI fields according to embodiment 3-1.
- FIG. 15 is a diagram showing an example of a DCI field used to indicate the order of multiple SRI fields according to embodiment 3-2.
- FIG. 16 is a diagram showing an example of correspondence between the TPMI field/TPC command field and repeated transmission of PUSCH according to the embodiment 4-1.
- FIG. 17 is a diagram showing an example of the correspondence between the TPMI field/TPC command field and repeated transmission of PUSCH according to the embodiment 4-2.
- FIG. 18 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment;
- FIG. 19 is a diagram illustrating an example of the configuration of a base station according to one embodiment.
- FIG. 20 is a diagram illustrating an example of the configuration of a user terminal according to one embodiment.
- FIG. 21 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to one embodiment.
- repeat transmission is supported in data transmission.
- a base station network (NW), gNB) repeats transmission of DL data (for example, downlink shared channel (PDSCH)) a predetermined number of times.
- PDSCH downlink shared channel
- the UE repeats transmission of UL data (eg, uplink shared channel (PUSCH)) a predetermined number of times.
- PUSCH uplink shared channel
- FIG. 1A is a diagram showing an example of repeated transmission of PUSCH.
- FIG. 1A an example of scheduling a predetermined number of repeated PUSCHs with a single DCI is shown.
- the number of iterations is also called a repetition factor K or an aggregation factor K.
- the nth iteration may also be referred to as the nth transmission occasion, etc., and may be identified by a iteration index k (0 ⁇ k ⁇ K ⁇ 1).
- FIG. 1A shows repeated transmissions of PUSCH dynamically scheduled in DCI (eg, dynamic grant-based PUSCH), it may also be applied to repeated transmissions of configured grant-based PUSCH.
- the UE semi-statically receives information indicating the repetition factor K (eg, aggregationFactorUL or aggregationFactorDL) via higher layer signaling.
- the higher layer signaling may be, for example, 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), a system information block (SIB), or a minimum system information (RMSI: Remaining Minimum System Information).
- MIB master information block
- SIB system information block
- RMSI Minimum System Information
- PDSCH reception processing for example, reception, demapping, demodulation, decoding at least one
- control the PUSCH transmission process e.g., transmission, mapping, modulation, and/or coding
- allocation of time domain resources e.g.
- RB Resource Block
- RBG Resource Block Group
- MCS Modulation and Coding Scheme
- DMRS Demodulation Reference Signal
- Spatial relation info of PUSCH Spatial relation info of PUSCH
- TCI-state Transmission Configuration Indication
- FIG. 1A shows a case where PUSCH in each slot is assigned to a predetermined number of symbols from the beginning of the slot. Identical symbol allocations between slots may be determined as described for time domain resource allocation above.
- the UE determines the symbol in each slot based on the start symbol S and the number of symbols L (eg, Start and Length Indicator (SLIV)) determined based on the value m of a predetermined field (eg, TDRA field) in the DCI. Allocation may be determined. Note that the UE may determine the first slot based on K2 information determined based on the value m of a predetermined field (eg, TDRA field) of DCI.
- L Start and Length Indicator
- the redundancy version (Redundancy Version (RV)) applied to the TB based on the same data may be the same, or may be at least partially different.
- the RV applied to that TB at the nth slot may be determined based on the value of a predetermined field (eg, RV field) in the DCI.
- Resources allocated in consecutive K slots are uplink communication direction indication information for TDD control (for example, "TDD-UL-DL-ConfigCommon", “TDD-UL-DL-ConfigDedicated” of RRC IE) and If the communication direction is different in at least one symbol from UL, DL or Flexible of each slot specified by at least one slot format indicator of DCI (for example, DCI format 2_0), the symbol is Resources in the containing slot may not transmit (or receive).
- PUSCH is repeatedly transmitted over a plurality of slots (slot units) as shown in FIG. 1A, but Rel. 16 and later, it is assumed that PUSCH is repeatedly transmitted in units shorter than slots (for example, in units of subslots, units of minislots, or units of a predetermined number of symbols) (see FIG. 1B).
- the nth iteration may also be referred to as the nth transmission occasion, etc., and may be identified by a iteration index k (0 ⁇ k ⁇ K ⁇ 1).
- FIG. 1B shows repeated transmissions of PUSCH dynamically scheduled in DCI (eg, dynamic grant-based PUSCH), it may also be applied to repeated transmissions of configured grant-based PUSCH.
- a predetermined field eg, TDRA field
- the UE may dynamically receive information indicating the repetition factor K (eg, numberofrepetitions) using downlink control information.
- a repetition factor may be determined based on the value m of a predetermined field (eg, the TDRA field) in the DCI. For example, a table that defines the correspondence between bit values notified by DCI, repetition coefficient K, start symbol S, and number of symbols L may be supported.
- the slot-based repetition transmission shown in FIG. 1A is called repetition transmission type A (for example, PUSCH repetition Type A), and the subslot-based repetition transmission shown in FIG. 1B is called repetition transmission type B (for example, PUSCH repetition Type B ) may be called
- the UE may be configured to apply at least one of repeat transmission type A and repeat transmission type B.
- the repeat transmission type applied by the UE may be notified from the base station to the UE through higher layer signaling (eg, PUSCHRepTypeIndicator).
- Either repetition transmission type A or repetition transmission type B may be configured in the UE for each DCI format that schedules PUSCH.
- a first DCI format e.g., DCI format 0_1
- higher layer signaling e.g., PUSCHRepTypeIndicator-AorDCIFormat0_1
- PUSCH-RepTypeB repeat transmission type B
- the UE receives the first DCI Apply repeat transmission type B for PUSCH repeat transmissions scheduled in the format. Otherwise (e.g., if PUSCH-RepTypeB is not configured or if PUSCH-RepTypA is configured), the UE applies repeat transmission type A for PUSCH repeat transmissions scheduled in the first DCI format. do.
- PUSCH included in the higher layer parameters may be set by a parameter related to the number of repetitions of (eg, numberOfRepetitions-r16).
- the UE may determine the number of PUSCH repetitions scheduled by that DCI based on the DCI's time domain resource allocation field. When the number of repetitions is set/designated to 1, the UE may perform a single PUSCH transmission.
- Invalid symbol pattern When applying repeat transmission type B to PUSCH transmission, it is also being considered to notify the UE of information about symbols (or symbol patterns) that cannot be used for PUSCH transmission.
- a symbol pattern that cannot be used for PUSCH transmission may be called 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 DCI formats 0_1 and 0_2).
- the first higher layer parameter is used to notify the UE of information on invalid symbol patterns that cannot be used for PUSCH transmission.
- DCI may be used to notify the UE of whether or not the information on the invalid symbol pattern is applied.
- a bit field for indicating whether or not to apply information on invalid symbol patterns field for notifying whether or not to apply invalid symbol patterns
- the second higher layer parameter may be used to notify the UE of whether or not the notification field (or additional bit) in DCI is set. That is, when the information about the invalid symbol pattern is notified by the first higher layer parameter, the UE may determine whether or not to apply the information about the invalid symbol pattern based on the second higher layer parameter and DCI. .
- the UE may control PUSCH transmission without considering invalid symbol patterns.
- the UE may determine whether to apply the invalid symbol pattern based on the second higher layer parameter and DCI. For example, if the second higher layer parameter indicates the addition of an additional bit (or a predetermined field) indicating whether to apply the invalid symbol pattern to the DCI, the UE is based on the predetermined field of the invalid symbol pattern. Applicability may be determined.
- the first upper layer parameter may be information that notifies a symbol pattern that is invalid for PUSCH transmission, and may be applied in a bitmap format, for example (see FIG. 2A).
- FIG. 2A is a diagram showing an example in which invalid symbol patterns are defined in a bitmap (1-D bitmap) in the time domain.
- the UE may determine available resources for PUSCH transmission in one or more frequency bandwidths (eg, BWP) based on information about invalid symbol patterns (see FIG. 2B).
- BWP frequency bandwidths
- repetition transmission type B When repetition transmission type B is applied and repetition transmission is performed in units of sub-slots, some repetition transmission crosses the slot-boundary depending on the repetition factor (K) and data allocation unit. A case arises.
- FIG. 3A shows an example of applying repetition transmission type B when the repetition factor (K) is 4 and the PUSCH length (L) is 4.
- K repetition factor
- L PUSCH length
- PUSCH transmission may be performed using symbols other than the DL symbol portion.
- the PUSCH may be divided (or segmented).
- the UE uses information (SRS configuration information, e.g., RRC control element "SRS-Config" used for transmission of measurement reference signals (e.g., Sounding Reference Signal (SRS)) parameters) may be received.
- SRS configuration information e.g., RRC control element "SRS-Config" used for transmission of measurement reference signals (e.g., Sounding Reference Signal (SRS))
- SRS-Config used for transmission of measurement reference signals (e.g., Sounding Reference Signal (SRS)) parameters
- the UE receives information on one or more SRS resource sets (SRS resource set information, e.g., "SRS-ResourceSet” of the RRC control element) and information on one or more SRS resources (SRS resource information, eg, "SRS-Resource” of the RRC control element).
- SRS resource set information e.g., "SRS-ResourceSet” of the RRC control element
- SRS resource information e.g. "SRS-Resource” of the RRC control element
- One SRS resource set may be associated with a predetermined number of SRS resources (a predetermined number of SRS resources may be grouped together).
- Each SRS resource may be identified by an SRS resource indicator (SRI) or an 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, SRS resource types (for example, periodic SRS (Periodic SRS), semi-persistent Either SRS (Semi-Persistent SRS) or aperiodic CSI (Aperiodic SRS)), and information on SRS usage may be included.
- SRS-ResourceSetId SRS resource set ID
- SRS-ResourceId list of SRS resource IDs used in the resource set
- SRS resource types for example, periodic SRS (Periodic SRS), semi-persistent Either SRS (Semi-Persistent SRS) or aperiodic CSI (Aperiodic SRS)
- SRS resource types for example, periodic SRS (Periodic SRS), semi-persistent Either SRS (Semi-Persistent SRS) or a
- the SRS resource types are periodic SRS (P-SRS), semi-persistent SRS (SP-SRS), and aperiodic CSI (Aperiodic SRS (A-SRS)).
- P-SRS periodic SRS
- SP-SRS semi-persistent SRS
- A-SRS aperiodic CSI
- the UE may transmit P-SRS and SP-SRS periodically (or periodically after activation) and transmit A-SRS based on DCI's SRS request.
- usage of RRC parameter, "SRS-SetUse” of L1 (Layer-1) parameter is, for example, beam management (beamManagement), codebook (CB), noncodebook (noncodebook ( NCB)), antenna switching, and the like.
- the SRS for codebook or non-codebook applications may be used to determine precoders for codebook-based or non-codebook-based PUSCH transmissions based on SRI.
- the UE determines the precoder for PUSCH transmission based on the SRI, the Transmitted Rank Indicator (TRI) and the Transmitted Precoding Matrix Indicator (TPMI). may be determined.
- the UE may determine the precoder for PUSCH transmission based on the SRI for non-codebook-based transmission.
- SRS resource information includes SRS resource ID (SRS-ResourceId), SRS port number, SRS port number, transmission Comb, SRS resource mapping (eg, time and/or frequency resource position, resource offset, resource period, repetition number, SRS number of symbols, SRS bandwidth, etc.), hopping related information, SRS resource type, sequence ID, spatial relationship information of SRS, and so on.
- the spatial relationship information of the SRS may indicate spatial relationship information between a given reference signal and the SRS.
- the predetermined reference signal includes a Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block, a Channel State Information Reference Signal (CSI-RS) and an SRS (for example, another SRS).
- SS/PBCH Synchronization Signal/Physical Broadcast Channel
- CSI-RS Channel State Information Reference Signal
- SRS for example, another SRS.
- An SS/PBCH block may be referred to as a Synchronization Signal Block (SSB).
- SSB Synchronization Signal Block
- the SRS spatial relationship information may include at least one of the SSB index, CSI-RS resource ID, and SRS resource ID as the index of the predetermined reference signal.
- the SSB index, SSB resource ID and SSB Resource Indicator may be read interchangeably.
- the CSI-RS index, CSI-RS resource ID and CSI-RS resource indicator (CRI) may be read interchangeably.
- the SRS index, the SRS resource ID, and the SRI may be read interchangeably.
- the spatial relationship information of the SRS may include the serving cell index, BWP index (BWP ID), etc. corresponding to the predetermined reference signal.
- the SRS resource may be transmitted using the same spatial domain filter (spatial domain transmit filter).
- the UE may assume that the UE receive beam for SSB or CSI-RS and the UE transmit beam for SRS are the same.
- a spatial domain filter for the transmission of this reference SRS may be transmitted using the same spatial domain filter (spatial domain transmit filter) as (spatial domain transmit 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 PUSCHs scheduled by that DCI based on the value of a predetermined field (eg, SRS Resource Identifier (SRI) field) within the DCI (eg, DCI format 0_1). Specifically, the UE may use the spatial relationship information (eg, “spatialRelationInfo” of the RRC information element) of the SRS resource determined based on the value of the predetermined field (eg, SRI) for PUSCH transmission.
- a predetermined field eg, SRS Resource Identifier (SRI) field
- the UE when using codebook-based transmission, the UE is configured by RRC with two SRS resources per SRS resource set and one of the two SRS resources is indicated by DCI (1-bit SRI field).
- DCI (1-bit SRI field).
- the UE when using non-codebook based transmission, the UE is configured by RRC with 4 SRS resources per SRS resource set and one of the 4 SRS resources is indicated by DCI (2-bit SRI field).
- the Transmitted Precoding Matrix Indicator (TPMI) and transmission rank for codebook-based PUSCH transmission are specified in specific fields (e.g., DCI format 0_1) included in downlink control information (e.g., DCI format 0_1) For example, it is considered to be specified by precoding information and number of layers field).
- the precoder that the UE uses for codebook-based PUSCH transmission is selected from uplink codebooks with the same number of antenna ports as the value set in the higher layer parameters (e.g., nrofSRS-Ports) configured for SRS resources.
- the higher layer parameters e.g., nrofSRS-Ports
- the size (number of bits) of this particular field is variable depending on the number of antenna ports for PUSCH (for example, the number of ports indicated by nrofSRS-Ports above) and some higher layer parameters.
- This particular field may be 0 bits if the higher layer parameters configured for the UE (eg, txConfig) are set to nonCodebook.
- this particular field may be 0 bits if the higher layer parameters configured for the UE (e.g., txConfig) are configured in the codebook. .
- This particular field is also set for the UE if the higher layer parameters (e.g., txConfig) set for the UE are set in the codebook for the four antenna ports. It may have a bit length of 2 to 6 bits, depending on another higher layer parameter and/or whether the transform precoder is present (enabled or disabled).
- the higher layer parameters e.g., txConfig
- this particular field is set for the UE if the higher layer parameters (e.g., txConfig) set for the UE are set in the codebook for the two antenna ports. It may have a bit length of 1 to 4 bits, depending on another higher layer parameter and/or whether the transform precoder is present (enabled or disabled).
- the higher layer parameters e.g., txConfig
- the other higher layer parameters include a parameter for specifying the UL full power transmission mode (e.g., ul-FullPowerTransmission), a parameter indicating the maximum value of the UL transmission rank (e.g., maxRank), a certain precoding matrix indicator ( It may be at least one of a parameter (for example, codebookSubset) indicating a subset of PMI) and a parameter for specifying a transform precoder (for example, transformPrecoder).
- a parameter for specifying the UL full power transmission mode e.g., ul-FullPowerTransmission
- a parameter indicating the maximum value of the UL transmission rank e.g., maxRank
- a certain precoding matrix indicator It may be at least one of a parameter (for example, codebookSubset) indicating a subset of PMI) and a parameter for specifying a transform precoder (for example, transformPrecoder).
- Multi-TRP In NR, one or more transmission/reception points (TRP) (multi-TRP) uses one or more panels (multi-panel) to perform DL transmission to the UE. It is also, it is being considered that the UE performs UL transmission for one or more TRPs (see FIG. 4).
- a 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.
- FIGS. 5A to 5C are diagrams showing an example of single PUSCH transmission, repeated PUSCH transmission for a single TRP, and repeated PUSCH transmission for multiple TRPs.
- the UE makes a single PUSCH transmission with the first SRI determined from the first SRI field.
- the UE performs repeated PUSCH transmissions for a single TRP using the first SRI determined from the first SRI field.
- the UE uses the first SRI determined from the first SRI field and the second SRI determined from the second SRI field to transmit PUSCH for multiple TRPs. Send repeatedly.
- each SRI field includes an "unapplied codepoint".
- the UE decides whether to repeat transmission for a single TRP or repeat transmissions for multiple TRPs based on whether non-applicable codepoints are indicated in each of the SRI fields.
- the UE decides to perform single PUSCH transmission/repeated transmission of PUSCH for single TRP. do. Also, when application of multiple effective SRS resources (SRI) is indicated in each of multiple SRI fields, the UE determines to perform repeated transmission of PUSCH for multiple TRPs.
- SRI effective SRS resources
- FIG. 6A is a diagram showing an example of repeated transmission of PUSCH for a single TRP according to Option 1.
- FIG. 6A two SRI fields (SRI field #1 and SRI field #2) are configured for the UE.
- the number of iterations assigned to the UE is four.
- the UE is indicated to the SRS resource #1 from the SRI field #1, and to the SRI of "Not applied" from the SRI field #2.
- the UE decides to perform repeated transmission of PUSCH for a single TRP using SRS resource #1, since the SRS resource indicated in one SRI field is the non-applicable SRI.
- FIG. 6B is a diagram showing an example of repeated transmission of PUSCH for multiple TRPs according to option 1.
- FIG. 6B two SRI fields (SRI field #1 and SRI field #2) are configured for the UE.
- the number of iterations assigned to the UE is four.
- the UE is indicated to the SRS resource #1 from the SRI field #1 and to the SRS resource #3 from the SRI field #2.
- the UE decides to perform repeated transmissions of PUSCH on multiple TRPs because the SRS resources indicated in each of the two SRI fields are not both non-applicable SRIs.
- the UE decides to perform either repeated transmissions for a single TRP or repeated transmissions for multiple TRPs based on certain fields contained in the DCI.
- the specific field may be a field indicating TPMI in codebook-based PUSCH (TPMI field), or a field indicating SRI in non-codebook-based PUSCH (SRI field). , Rel. It may be a new specific field defined after 17.
- the first SRI field or the second SRI field is selected depending on a specific field included in the DCI. If any one of the two SRI fields is indicated to apply, the UE may decide to perform repeated transmissions of PUSCH in a single TRP.
- the UE determines to repeatedly transmit PUSCH in multiple TRPs. do.
- FIG. 7 is a diagram showing an example of repeated transmission of PUSCH for a single TRP according to option 2.
- two SRI fields (SRI field #1 and SRI field #2) are configured for the UE.
- the number of iterations assigned to the UE is four.
- the UE is instructed by fields included in the DCI to apply the SRI field #1 and the SRS resource/SRS resource set corresponding to the SRI field #1. Also, the UE is indicated to the SRS resource #1 from the SRI field #1 and to the SRS resource #3 from the SRI field #2. The UE decides to perform repeated transmission of PUSCH for a single TRP using SRS resource #1 according to a field included in DCI.
- FIG. 8 is a diagram showing an example of repeated transmission of PUSCH for multiple TRPs according to option 2.
- two SRI fields (SRI field #1 and SRI field #2) are configured for the UE.
- the number of iterations assigned to the UE is four.
- the fields included in the DCI instruct the UE to apply SRI field #1 and SRI field #2. Also, the UE is indicated to the SRS resource #1 from the SRI field #1 and to the SRS resource #3 from the SRI field #2. The UE determines to perform repeated transmission of PUSCH for multiple TRPs using SRS resource #1 and SRS resource #3 according to fields included in DCI.
- mapping pattern When the UE decides to perform repeated transmissions of PUSCH for multiple TRPs, it may determine that multiple SRIs and multiple repeated transmissions are supported based on certain rules. Such rules may also be referred to as mapping patterns, mapping rules, correspondence patterns, correspondences, and the like.
- the UE when the UE decides to perform repeated transmissions of PUSCH for multiple TRPs, it may determine that multiple SRIs cyclically correspond to multiple repeated transmissions. Such correspondences may be referred to as cyclical mappings, cyclical patterns, cyclical correspondences, and the like.
- FIG. 9A is a diagram showing an example in which multiple SRIs and multiple repeated transmissions cyclically correspond.
- the UE performs repeated transmission of PUSCH with 6 specified as the repetition number and using the first SRI and the second SRI.
- the UE cyclically performs PUSCH transmissions using a first SRI and PUSCH transmissions using a second SRI. For example, a first SRI is applied to the odd iterations (iterations #1, #3, #5) and a second SRI is applied to the even iterations (iterations #0, #2, #4). good too.
- the UE when the UE determines to perform repeated transmission of PUSCH in multiple TRPs, it determines that multiple SRIs correspond to multiple repeated transmissions and a specific number (for example, two) sequentially.
- a specific number for example, two
- Such correspondences may be referred to as sequential mappings, sequential patterns, sequential correspondences, and the like.
- FIG. 9B is a diagram showing an example in which multiple SRIs and multiple repeated transmissions sequentially correspond.
- the UE performs repeated transmission of PUSCH with 6 specified as the repetition number and using the first SRI and the second SRI.
- the UE sequentially performs two PUSCH transmissions using the first SRI and two PUSCH transmissions using the second SRI.
- the multiple SRIs and the multiple repeated transmissions correspond successively to roughly equal the number of repetitions divided by the number of SRIs.
- the SRI number is 2
- the correspondence may be called a half-half pattern (mapping).
- FIG. 9C is a diagram showing an example of using a half-half pattern to correspond to multiple SRIs and multiple repeated transmissions.
- the UE performs repeated transmission of PUSCH with 6 specified as the number of repetitions and using the first SRI and the second SRI.
- the UE performs PUSCH transmission using the first SRI in the first half (first three) PUSCH transmission opportunities, and uses the second SRI in the second half (three subsequent) PUSCH transmission opportunities. performs PUSCH transmission using .
- one of the plurality of mapping patterns described using FIGS. 9A to 9C may be defined in specifications. Also, the plurality of mapping patterns may be defined in the specification, and the mapping pattern to be applied may be set/instructed to the UE using at least one of higher layer signaling and physical layer signaling. Also, the UE may report to the NW the UE capability regarding which of the multiple mapping patterns the application of which mapping pattern is supported.
- the number of PUSCH transmission repetitions, the number of SRIs, and the like shown in FIGS. 9A to 9C are merely examples, and are not limited to these. Also, the number of repetitions of PUSCH transmission, the number of codepoints/codepoint names in each field, the number of bits, the number of SRIs, etc. in the following drawings are merely examples, and are not limited to these examples.
- the order of multiple (for example, two) TRPs to be used in the present disclosure, may be referred to as multiple TRP order), Insufficient consideration has been given to whether or not to dynamically switch (change) and how to dynamically switch the order of multiple TRPs to be used. If these considerations are not sufficiently carried out and repeated transmission of PUSCH in multi-TRP is not appropriately performed, there is a risk that throughput will decrease or communication quality will deteriorate.
- TRP # 1 first perform UL transmission for TRP # 1
- TRP # 2 first UL transmission for TRP#1 followed by UL transmission for TRP#1.
- FIGS. 10A and 10B show circular mapping, sequential mapping or half-half patterns may also be used.
- the inventors came up with a control method for PUSCH repeat transmission that solves the above problem.
- port, panel, beam, Uplink (UL) transmitting entity, TRP, spatial relationship information (SRI), spatial relationship, control resource set (COntrol Resource SET (CORESET)), PDSCH, codeword, base station , a predetermined antenna port (for example, a demodulation reference signal (DeModulation Reference Signal (DMRS)) port), a predetermined antenna port group (for example, a DMRS port group), a predetermined group (for example, Code Division Multiplexing ( CDM)) group, predetermined reference signal group, CORESET group, panel group, beam group, spatial relation group, PUCCH group), CORESET pool may be read interchangeably.
- panel identifier (ID) and panel may be read interchangeably.
- TRP ID and TRP may be read interchangeably.
- indexes, IDs, indicators, and resource IDs may be read interchangeably.
- A/B may mean “at least one of A and B”. Also, in the present disclosure, “A/B/C” may mean “at least one of A, B and C.”
- SRI Spatial Relation Information
- SRS resource indicator SRS Resource Indicator (SRI), (or SRI field)
- SRS resource SRS resource set, precoder, etc.
- spatial relation information SRI
- SRI spatial relation information
- SRI for codebook-based transmission SRI for codebook-based transmission
- non-codebook-based SRI combination SRI for codebook-based transmission
- spatialRelationInfo UL TCI
- TCI state TCI state
- Unified TCI QCL, etc.
- the first TRP and the second TRP are the first PUSCH and the second PUSCH, the first PUSCH transmission opportunity and the second PUSCH transmission opportunity, the first SRI and the second SRI, etc. and may be read interchangeably.
- repeated transmission of PUSCH for multiple TRPs may be read as PUSCH over multiple TRPs, repeated PUSCH over multiple TRPs, simply repeated PUSCH, repeated transmission, multiple PUSCH transmission, and the like.
- a single PUSCH transmission for a single TRP may also be referred to simply as a single PUSCH transmission, a PUSCH transmission in a single TRP, and so on.
- repeated transmission of PUSCH for a single TRP may mean repeated transmission of multiple PUSCHs transmitted using the same SRI/beam/precoder.
- repeated transmission of PUSCH for multiple TRPs may mean repeated transmission of multiple PUSCHs transmitted using multiple different SRIs/beams/precoders.
- the repeated transmissions and multiple SRIs/beams/precoders may correspond cyclically or sequentially by a specific number, as detailed in the mapping pattern above. Alternatively, a correspondence using a half-half pattern (mapping) may be used.
- each SRI field may indicate one or more SRS resources (SRIs) to the UE.
- SRIs SRS resources
- the 'dynamic switch' in the present disclosure may mean 'a switch that uses at least one of higher layer signaling and physical layer signaling'.
- switch in the present disclosure may be read interchangeably as switching, change, changing, application, and the like.
- non-applied code points may be read as non-applicable code points, reserved code points, code points indicating Not applied, and the like.
- code points that do not apply are Rel. It may be a reserved codepoint in the SRI field in 16.
- “Not applied” in the present disclosure may be read interchangeably as “Not Applicable”, “Not Available”, “N/A”, “not valid”, and the like.
- TPMI TPMI
- TPC command field a field that indicates a TPC command included in DCI
- each embodiment of the present disclosure can also be appropriately applied to repeated transmission of any UL signal/channel for multiple TRPs, and PUSCH in the present disclosure may be read as any UL signal/channel.
- each embodiment of the present disclosure can be appropriately applied to repeated transmission of PUCCH for multiple TRPs, and PUSCH in the present disclosure may be read as PUCCH.
- the UE assumes, expects that a particular SRI field/SRS resource set/TRP is predefined/fixed to be the "first beam". ).
- the particular SRI field/SRS resource set/TRP may be the SRI field/SRS resource set/TRP with the lowest index/highest index/x-th index (where x is an integer); It may be the SRI field/SRS resource set/TRP positioned last/xth.
- the "first beam” may mean the SRI field/SRS resource set/TRP used for the first transmission of repeated transmissions performed by the UE.
- the correspondence between repeated transmission of PUSCH for multiple TRPs and multiple SRI fields/SRS resource sets/TRPs is cyclic, as detailed in the above mapping pattern. , sequential correspondence by a specific number, or correspondence using a half-half pattern (mapping).
- FIG. 11 is a diagram showing an example of the order of multiple SRI fields according to Embodiment 1-1.
- the example shown in FIG. 11 shows an example of a cyclic mapping in which repeat transmissions and multiple SRI fields correspond cyclically, and a specific number (here, two) of sequential correspondences. It shows an example of sequential mapping.
- the UE assumes that SRI field #1 with the lowest index is fixed as the first SRI.
- the UE first performs one PUSCH transmission utilizing SRI field #1 and then one PUSCH transmission utilizing SRI field #2. Thereafter, PUSCH transmission using SRI field #1 and PUSCH transmission using SRI field #2 are alternately performed once each.
- the UE first performs two PUSCH transmissions utilizing SRI field #1 and then two PUSCH transmissions utilizing SRI field #2.
- the UE may be notified of the SRI field/SRS resource set/TRP information configured as the "first beam" by higher layer signaling (eg, RRC signaling).
- higher layer signaling eg, RRC signaling
- the UE via higher layer signaling (e.g., RRC signaling), determines whether the first SRI field/SRS resource set/TRP or the second SRI field/SRS resource set/TRP is the "first beam”.
- higher layer signaling e.g., RRC signaling
- information for setting the mapping pattern for the UE may be signaled in higher layer signaling (eg, RRC information element for mapping pattern configuration).
- the UE via higher layer signaling, for each SRS resource set of the CB/NCB (for example, a resource set configured by higher layer parameters (for example, SRS-Config)), the corresponding SRI field/SRS resource set/TRP is the "first beam" (Embodiment 1-2-2).
- SRS-Config higher layer parameters
- the UE may determine which SRI field/SRS resource set/TRP is the "first beam” based on the mapping pattern information notified by the RRC information element for mapping pattern configuration. (Embodiment 1-2-3). In other words, the UE provides information specifying a mapping pattern that sets the "first beam” to be the first SRI field/SRS resource set/TRP (first mapping pattern information), or "first information (second mapping pattern information) that specifies a mapping pattern that sets the beam of the second SRI field/SRS resource set/TRP.
- first mapping pattern information and the second mapping pattern information may be different.
- a parameter indicating cyclic mapping type 1 (eg, CyclicalMappingType1) is set as the first mapping pattern information for the UE
- the UE is configured such that the first SRI field/SRS resource set/TRP is the "first 1 beam”.
- a parameter indicating cyclic mapping type 2 (eg, CyclicalMappingType2) is set as the second mapping pattern information for the UE
- the UE uses the second SRI field/SRS resource set/TRP It may be determined to be the "first beam”.
- cyclic mapping may be sequential mapping or a half-half pattern.
- information indicating at least one of cyclic mapping, sequential mapping, and half-half pattern may be notified to the UE as the mapping pattern information.
- a plurality of pieces of the first/second mapping pattern information may be defined, respectively, and at least one of them may be set in the UE.
- SequentialMappingType1/2, half-half mappingType1/2, etc. are configured in the UE.
- Embodiment 1-2 various settings (upper layer parameters) shown in Embodiment 1-2 may be included in RRC information elements other than the above-described RRC information elements (RRC information elements for mapping pattern setting, SRS-Config, etc.). Good, Rel. It may be included in a new RRC information element specified after V.17.
- FIGS. 12A and 12B are diagrams showing an example of the order of multiple SRI fields according to Embodiment 1-2.
- the repeat transmissions and multiple SRI fields correspond to cyclic mapping examples and sequential mappings by a certain number (here, two). sequential) are shown.
- the UE is configured with SRI field #1 as the first SRI.
- the UE first performs one PUSCH transmission utilizing SRI field #1 and then one PUSCH transmission utilizing SRI field #2. Thereafter, PUSCH transmission using SRI field #1 and PUSCH transmission using SRI field #2 are alternately performed once each.
- the UE first makes two PUSCH transmissions utilizing SRI field #1, then makes two PUSCH transmissions utilizing SRI field #2.
- the UE is configured with SRI field #2 as the first SRI.
- the UE first performs one PUSCH transmission utilizing SRI field #2 and then one PUSCH transmission utilizing SRI field #1. Thereafter, PUSCH transmission using the SRI field #2 and PUSCH transmission using the SRI field #1 are alternately performed once each.
- the UE first performs two PUSCH transmissions utilizing SRI field #2, followed by two PUSCH transmissions utilizing SRI field #1.
- One SRI field may be signaled to the UE. Based on the one SRI field, the UE may decide to perform either repeated transmissions for a single TRP or repeated transmissions for multiple TRPs.
- the UE When the UE decides to perform repeated transmissions for multiple TRPs, it may decide which SRI is the "first beam" based on the codepoints of the indicated SRI field.
- FIG. 13 is a diagram showing an example of the order of multiple TRPs according to the modification of the first embodiment.
- the UE is informed of one SRI field.
- the code point “00” of the SRI field corresponds to “SRS resource #1, SRS resource #2”, and the code point “01” of the SRI field corresponds to “SRS resource # 2, SRS resource #1”, the code point “10” in the SRI field corresponds to “SRS resource #1”, and the code point “11” in the SRI field corresponds to “SRS resource #2”.
- circular mapping is applied to the example shown in FIG.
- Codepoints '00', '01' in the SRI field correspond to repeated transmissions for multiple TRPs
- codepoints '10', '11' correspond to single PUSCH transmissions/repeated transmissions of PUSCH for a single TRP. corresponds to
- the UE determines to perform repeated transmission for multiple TRPs (using SRS resource #1 and SRS resource #2), and the beginning of the codepoint ( The leftmost SRS resource (here, SRS resource #1) is determined to be the “first beam”.
- the UE determines to perform repeated transmission for multiple TRPs (using SRS resource #1 and SRS resource #2), and the beginning of the codepoint (here, SRS resource #2) is determined to be the “first beam”.
- the UE determines that the SRS resource at the beginning (leftmost) of the code point is the "first beam” has been described. right) may be determined to be the "first beam”.
- the TRP to be used first in repeated transmission is appropriate decision can be made.
- the UE may be indicated/updated in the MAC CE which SRI field/SRS resource set/TRP is the "first beam”.
- An indication field may be included in the MAC CE signaled to the UE to indicate which SRI field/SRS resource set/TRP is the 'first beam'.
- the indication field may have a specific number of bits (eg, 1). For example, when the indication field indicates a first value (eg, 0), the UE may determine that the first SRI field/SRS resource set/TRP is the 'first beam'. Also, when the indication field indicates a second value (eg, 1), the UE may determine that the second SRI field/SRS resource set/TRP is the 'first beam'.
- first value and the second value may be read interchangeably. Also, in the present disclosure, the first value and the second value may be read as the x-th value (x is any integer).
- a specific number (eg, 1) of bits may be set in the indication field for each CB/NCB SRS resource set. For example, for a CB/NCB SRS resource set in which the indication field indicates the first value (for example, 0), the UE indicates that the SRS resource set/the SRI field/TRP corresponding to the SRS resource set is "first It may be determined that it is a beam of In addition, for the SRS resource set of CB/NCB in which the indication field indicates the second value (for example, 1), the UE determines that the SRS resource set/SRI field/TRP corresponding to the SRS resource set is "first It may be determined that it is not a "beam of
- the UE may determine which SRI field/SRS resource set/TRP is the "first beam” based on the mapping pattern indication field notified by MAC CE.
- the UE uses an indication field (first mapping pattern indication field) for a mapping pattern indicating that the “first beam” is the first SRI field/SRS resource set/TRP, or “first
- the MAC CE may receive an indication field (second mapping pattern indication field) regarding the mapping pattern that indicates that the "beam of" is the second SRI field/SRS resource set/TRP.
- the UE may determine the mapping pattern to apply for repeated transmissions based on whether the indication field indicates a particular value (eg, 0 or 1).
- the UE when the first mapping pattern indication field indicates a second value (eg, 1), the UE applies cyclic mapping type 1 (eg, CyclicalMappingType1). At this time, the UE may determine that the first SRI field/SRS resource set/TRP is the 'first beam'.
- a second value eg, 1
- cyclic mapping type 1 eg, CyclicalMappingType1
- the UE when the second mapping pattern indication field indicates a second value (eg, 1), the UE applies cyclic mapping type 2 (eg, CyclicalMappingType2). At this time, the UE may determine that the second SRI field/SRS resource set/TRP is the 'first beam'.
- a second value eg, 1
- cyclic mapping type 2 eg, CyclicalMappingType2
- cyclic mapping may be sequential mapping or a half-half pattern.
- An indication field indicating which SRI field/SRS resource set/TRP is the “first beam” may be included in the MAC CE used for SRS activation/deactivation. Also, the indication field may be included in the MAC CE indicating the spatial relationship of the SRS.
- the MAC CE (for example, activation/diagnosis of SRS) Activation MAC CE, SRS spatial relationship indication MAC CE) may include an indication field indicating which SRI field/SRS resource set/TRP is the "first beam".
- an indication field that indicates which SRI field/SRS resource set/TRP is the "first beam” may be included in a MAC CE other than the MAC CE described above, or Rel. It may be included in a new MAC CE defined after 17 (for example, a MAC CE that indicates/updates a mapping pattern).
- Embodiments 2-1 and 2-2 may be used in any combination.
- the same operation as the UE operation described above with reference to FIGS. 12A and 12B is possible.
- the UE may be indicated in the DCI which SRI field/SRS resource set/TRP is the 'first beam'.
- An indication field that indicates which SRI field/SRS resource set/TRP is the “first beam” is a single PUSCH transmission/repeated transmission of PUSCH for a single TRP and PUSCH for multiple TRPs. May be included in the DCI field used for dynamic switching with repeat transmission (or may be the same as the DCI field). In other words, whether the UE performs either a single PUSCH transmission/repeat transmission of PUSCH for a single TRP or repeat transmission of PUSCH for multiple TRPs based on a specific DCI field, and When repeatedly transmitting PUSCH for multiple TRPs, it may be determined/determined which SRI field/SRS resource set/TRP is the "first beam".
- the specific DCI field may be a specific DCI field as shown in Option 2 above.
- the specific field is Rel. 16 may be used, or the DCI field defined in Rel. It may be a new DCI field defined in 17 or later.
- Embodiment 3-1 is preferably applied when the above Option 2 is operated. Further, when multiple TRPs are indicated, all of the multiple SRI fields/TPMI fields/TPC command fields must indicate valid SRS resource/TPMI/TPC command values. A DCI field other than the SRI field/TPMI field/TPC command field is used for PUSCH transmission for a single TRP and repeated PUSCH transmission for multiple TRPs, and multiple SRI fields/TPMI fields/TPC command fields are valid. It is preferably applied when indicating an SRS resource that is suitable.
- FIG. 14 is a diagram showing an example of a DCI field used to indicate the order of multiple SRI fields according to Embodiment 3-1. Based on the DCI field as shown in FIG. 14 , the UE performs either repeated transmission of the PUSCH for a single TRP or repeated transmission of the PUSCH for multiple TRPs. In the case of repeated transmissions, determine which SRI field/SRS resource set/TRP is the 'first beam'.
- the UE when the DCI field indicates "00", the UE performs repeated PUSCH transmission/single PUSCH transmission for TRP #1 using SRI field #1. Also, if the DCI field indicates "01", the UE performs repeated PUSCH transmission/single PUSCH transmission for TRP#2 using SRI field #2.
- the UE may transmit multiple TRPs whose 'first beam' is SRI field #1 (TRP #1 using SRI field #1 and TRP using SRI field #2). #2) is determined to repeat transmission of PUSCH. Also, if the DCI field indicates '11', the UE uses multiple TRPs (TRP #1 and SRI field #2 that use SRI field #1) whose "first beam" is SRI field #2. (TRP#2) to be transmitted repeatedly.
- An indication field that indicates which SRI field/SRS resource set/TRP is the “first beam” is a single PUSCH transmission/repeated transmission of PUSCH for a single TRP and PUSCH for multiple TRPs.
- the DCI field used for dynamic switching with repeat transmissions may be set separately (independently).
- the UE determines whether to perform single PUSCH transmission/repeated transmission of PUSCH for a single TRP or repeated transmission of PUSCH for multiple TRPs based on the first DCI field. Then, when repeatedly transmitting PUSCH for multiple TRPs, it is determined which SRI field/SRS resource set/TRP is the "first beam" based on the second DCI field. / may be determined.
- the specific field is Rel. 16 may be used, or the DCI field defined in Rel. It may be a new DCI field defined in 17 or later.
- Embodiment 3- 2 is preferred.
- FIG. 15 is a diagram showing an example of a DCI field used to indicate the order of multiple SRI fields according to Embodiment 3-2.
- the UE is instructed to apply SRI field #1 and SRI field #2, as described in FIG.
- the UE determines which SRI field/SRS resource set/TRP is the 'first beam' based on the DCI field as shown in FIG.
- the UE may transmit multiple TRPs whose 'first beam' is SRI field #1 (TRP #1 using SRI field #1 and TRP using SRI field #2). #2) is determined to repeat transmission of PUSCH. Also, if the DCI field indicates '1', the UE uses multiple TRPs (TRP #1 and SRI field #2 that use SRI field #1) whose "first beam" is SRI field #2. (TRP#2) to be transmitted repeatedly.
- DCI can be used to appropriately determine the TRP to be used first in repeated transmission for a plurality of (for example, two) TRPs.
- ⁇ Fourth Embodiment> when the UE is instructed to repeatedly transmit PUSCH for multiple TRPs and is instructed to send multiple (for example, two) SRI fields/TPMI fields/TPC command fields, based on a specific rule may be used to determine the correspondence relationship between repeated transmission of PUSCH and the TPMI field/TPC command field.
- the particular rule may follow at least one of Embodiment 4-1 and Embodiment 4-2 described below.
- Each of the plurality of SRI fields/TPMI fields/TPC command fields may have a one-to-one correspondence.
- the TPMI field/TPC command field with the x-th index (where x is an integer) may correspond to the SRI field/SRS resource set field/TRP with the x-th index.
- the correspondence between the PUSCH repeated transmission/transmission opportunity and the SRI field/SRS resource set field/TRP may be determined according to the methods described in the second and third embodiments. good.
- the UE applies the TPMI field/TPC command field to repeated transmission/transmission opportunities of PUSCH using the SRI field/SRS resource set/TRP corresponding to the TPMI field/TPC command field. good too.
- FIG. 16 is a diagram showing an example of the correspondence between the TPMI field/TPC command field and repeated transmission of PUSCH according to Embodiment 4-1.
- FIG. 16 shows an example in which the “first beam” is SRI field #1 and an example in which it is SRI field #2.
- the UE applies TPMI field #1/TPC command field #1 for PUSCH transmissions that utilize SRI field #1, and TPMI field #2/TPC for PUSCH transmissions that utilize SRI field #2. Apply command field #2.
- the correspondence between multiple TPMI fields/TPC command fields and repeated transmission of PUSCH may be determined based on the mapping pattern.
- the correspondence between multiple TPMI fields/TPC command fields and repeated transmissions of PUSCH may be determined according to at least one of the cyclic mapping, sequential mapping and half-half pattern described above.
- the correspondence between the PUSCH repeated transmission/transmission opportunity and the SRI field/SRS resource set field/TRP may be determined according to the methods described in the second and third embodiments. good. Further, in the present embodiment, correspondence between a plurality of TPMI fields/TPC command fields and repeated transmission of PUSCH is set/instructed separately from correspondence between repeated transmission of PUSCH and SRI field/SRS resource set field/TRP. may be
- the UE uses at least one of higher layer signaling and physical layer signaling to receive information that sets/instructs correspondence between a plurality of TPMI fields/TPC command fields and repeated transmission of PUSCH. good too.
- FIG. 17 is a diagram showing an example of the correspondence between the TPMI field/TPC command field and repeated transmission of PUSCH according to Embodiment 4-2.
- FIG. 17 shows an example in which the "first beam" is SRI field #1 and an example in which it is SRI field #2.
- the UE is configured/instructed to apply cyclic mapping as a correspondence of multiple TPMI fields/TPC command fields and repeated transmissions of PUSCH.
- the UE applies TPMI field #1/TPC command field #1 for the first PUSCH transmission and TPMI field #2/TPC command field #2 for the next PUSCH transmission. do. Thereafter, the UE alternately performs PUSCH transmission using TPMI field #1/TPC command field #1 and PUSCH transmission using TPMI field #1/TPC command field #1 once each.
- the fourth embodiment described above it is possible to appropriately apply the TPMI/TPC command even when the TRP to be used first in repeated transmission for a plurality of (for example, two) TRPs is changed. be possible.
- UE capabilities related to each embodiment of the present disclosure will be described.
- the UE may report (transmit) to the NW as to whether it has this capability.
- a UE capability associated with each embodiment of the present disclosure may be defined as whether or not repeated transmission of PUSCH for multiple TRPs is supported.
- the UE capabilities associated with each embodiment of the present disclosure may be defined as whether or not repeated transmission of PUSCH for multiple TRPs for PUSCH repeated transmission type A/type B is supported.
- a UE capability associated with each embodiment of the present disclosure may be defined as whether or not dynamic switching between single PUSCH transmission and repeated transmission of PUSCH for multiple TRPs is supported.
- the UE capability associated with each embodiment of the present disclosure is defined as whether or not dynamic switching between repeated transmission of PUSCH for a single TRP and repeated transmission of PUSCH for multiple TRPs is supported. good too.
- the UE capabilities associated with each embodiment of the present disclosure may be defined as whether or not dynamic switching of the order of multiple TRPs is supported.
- the UE capabilities associated with each embodiment of the present disclosure may be defined as whether or not dynamic switching of the order of multiple TRPs based on MAC CE is supported.
- the UE capabilities associated with each embodiment of the present disclosure may be defined as whether dynamic switching of the order of multiple TRPs based on DCI is supported or not.
- the UE capabilities associated with each embodiment of the present disclosure may be defined as whether or not the UE capabilities described above are supported for CB/NCB based PUSCH.
- each embodiment of the present disclosure when the UE reports the UE capability corresponding to the at least one to the NW, and to the UE, the at least one UE capability is configured / activated by higher layer signaling / where indicated, may be applied under conditions of at least one of Embodiments of the present disclosure may apply when certain higher layer parameters are configured/activated/indicated for the UE.
- the UE can realize the functions in each embodiment described above while maintaining compatibility with existing specifications.
- wireless communication system A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below.
- communication is performed using any one of the radio communication methods according to the above embodiments of the present disclosure or a combination thereof.
- FIG. 18 is a diagram showing an example of a schematic configuration of a wireless communication system according to one 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 the Third Generation Partnership Project (3GPP). .
- LTE Long Term Evolution
- 5G NR 5th generation mobile communication system New Radio
- 3GPP Third Generation Partnership Project
- the wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
- RATs Radio Access Technologies
- MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)), etc.
- RATs Radio Access Technologies
- MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)), etc.
- LTE Evolved Universal Terrestrial Radio Access
- EN-DC E-UTRA-NR Dual Connectivity
- NE-DC NR-E -UTRA Dual Connectivity
- the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN).
- the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.
- the wireless communication system 1 has dual connectivity between multiple base stations within 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.
- dual connectivity NR-NR Dual Connectivity (NN-DC) in which both MN and SN are NR base stations (gNB)
- gNB NR base stations
- a wireless communication system 1 includes a base station 11 forming a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) arranged in the macrocell C1 and forming a small cell C2 narrower than the macrocell C1. You may prepare.
- a user terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and user terminals 20 are not limited to the embodiment shown in the figure.
- the base stations 11 and 12 are collectively referred to as the base station 10 when not distinguished.
- the user terminal 20 may connect to at least one of the multiple base stations 10 .
- the user terminal 20 may utilize at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).
- CA carrier aggregation
- CC component carriers
- DC dual connectivity
- Each CC may be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)).
- Macrocell C1 may be included in FR1, and small cell C2 may be included in FR2.
- FR1 may be a frequency band below 6 GHz (sub-6 GHz)
- FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.
- the user terminal 20 may communicate 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
- a plurality of base stations (eg, RRH) 10 may be connected by wire (eg, Common Public Radio Interface (CPRI) compliant optical fiber, X2 interface, etc.) or wirelessly (eg, NR communication).
- CPRI Common Public Radio Interface
- NR communication e.g, NR communication
- the base station 11 corresponding to the upper station is an Integrated Access Backhaul (IAB) donor
- the base station 12 corresponding to the relay station (relay) is an IAB Also called a node.
- IAB Integrated Access Backhaul
- the base station 10 may be connected to the core network 30 directly or via another base station 10 .
- the core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), and the like.
- EPC Evolved Packet Core
- 5GCN 5G Core Network
- NGC Next Generation Core
- the user terminal 20 may be a terminal compatible with at least one of communication schemes such as LTE, LTE-A, and 5G.
- a radio access scheme based on orthogonal frequency division multiplexing may be used.
- OFDM orthogonal frequency division multiplexing
- CP-OFDM Cyclic Prefix OFDM
- DFT-s-OFDM Discrete Fourier Transform Spread OFDM
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- a radio access method may be called a waveform.
- other radio access schemes for example, other single-carrier transmission schemes and other multi-carrier transmission schemes
- the UL and DL radio access schemes may be used as the UL and DL radio access schemes.
- a downlink shared channel Physical Downlink Shared Channel (PDSCH)
- PDSCH Physical Downlink Shared Channel
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- an uplink shared channel (PUSCH) shared by each user terminal 20 an uplink control channel (PUCCH), a random access channel (Physical Random Access Channel (PRACH)) or the like may be used.
- PUSCH uplink shared channel
- PUCCH uplink control channel
- PRACH Physical Random Access Channel
- User data, upper layer control information, System Information Block (SIB), etc. are transmitted by the PDSCH.
- User data, higher layer control information, and the like may be transmitted by PUSCH.
- a Master Information Block (MIB) may be transmitted by the PBCH.
- Lower layer control information may be transmitted by the PDCCH.
- the lower layer control information may include, for example, downlink control information (DCI) including scheduling information for 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.
- PDSCH may be replaced with DL data
- PUSCH may be replaced with UL data.
- a control resource set (CControl Resource SET (CORESET)) and a search space (search space) may be used for PDCCH detection.
- CORESET corresponds to a resource searching for DCI.
- the search space corresponds to the search area and search method of PDCCH candidates.
- a CORESET may be associated with one or more search spaces. The UE may monitor CORESETs associated with certain search spaces 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. Note that “search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. in the present disclosure may be read interchangeably.
- PUCCH channel state information
- acknowledgment information for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.
- SR scheduling request
- a random access preamble for connection establishment with a cell may be transmitted by the PRACH.
- downlink, uplink, etc. may be expressed without adding "link”.
- various channels may be expressed without adding "Physical" to the head.
- synchronization signals SS
- downlink reference signals DL-RS
- the DL-RS includes a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DeModulation Reference Signal (DMRS)), Positioning Reference Signal (PRS)), Phase Tracking Reference Signal (PTRS)), etc.
- CRS cell-specific reference signal
- CSI-RS channel state information reference signal
- DMRS Demodulation reference signal
- PRS Positioning Reference Signal
- PTRS Phase Tracking Reference Signal
- the synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- a signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called SS/PBCH block, SS Block (SSB), and so on.
- SS, SSB, etc. may also be referred to as reference signals.
- DMRS may also be called a user terminal-specific reference signal (UE-specific reference signal).
- FIG. 19 is a diagram illustrating an example of the configuration of a base station according to one embodiment.
- the base station 10 includes a control section 110 , a transmission/reception section 120 , a transmission/reception antenna 130 and a transmission line interface 140 .
- One or more of each of the control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140 may be provided.
- this example mainly shows the functional blocks that characterize 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 unit described below may be omitted.
- the control unit 110 controls the base station 10 as a whole.
- the control unit 110 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.
- the control unit 110 may control signal generation, scheduling (eg, resource allocation, mapping), and the like.
- the control unit 110 may control transmission/reception, measurement, etc. using the transmission/reception unit 120 , the transmission/reception antenna 130 and the transmission path interface 140 .
- the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, etc., and transfer them to the transmission/reception unit 120 .
- the control unit 110 may perform call processing (setup, release, etc.) of communication channels, state management of the base station 10, management of radio resources, and the like.
- the transmitting/receiving section 120 may include a baseband section 121 , a radio frequency (RF) section 122 and a measuring section 123 .
- the baseband section 121 may include a transmission processing section 1211 and a reception processing section 1212 .
- the transmitting/receiving unit 120 is configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field according to the present disclosure. be able to.
- the transmission/reception unit 120 may be configured as an integrated transmission/reception unit, or may be configured from a transmission unit and a reception unit.
- the transmission section may be composed of the transmission processing section 1211 and the RF section 122 .
- the receiving section may be composed of a reception processing section 1212 , an RF section 122 and a measuring section 123 .
- the transmitting/receiving antenna 130 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.
- the transmitting/receiving unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmitting/receiving unit 120 may receive the above-described uplink channel, uplink reference signal, and the like.
- the transmitting/receiving unit 120 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
- digital beamforming eg, precoding
- analog beamforming eg, phase rotation
- the transmission/reception unit 120 (transmission processing unit 1211) performs Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- HARQ retransmission control for example, HARQ retransmission control
- the transmission/reception unit 120 (transmission processing unit 1211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (DFT) on the bit string to be transmitted. Processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, transmission processing such as digital-to-analog conversion may be performed, and the baseband signal may be output.
- channel coding which may include error correction coding
- modulation modulation
- mapping mapping
- filtering filtering
- DFT discrete Fourier transform
- DFT discrete Fourier transform
- the transmitting/receiving unit 120 may perform modulation to a radio frequency band, filter processing, amplification, and the like on the baseband signal, and may transmit the radio frequency band signal via the transmitting/receiving antenna 130. .
- the transmitting/receiving unit 120 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 130.
- the transmission/reception unit 120 (reception processing unit 1212) performs analog-to-digital conversion, Fast Fourier transform (FFT) processing, and Inverse Discrete Fourier transform (IDFT) processing on the acquired baseband signal. )) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing and PDCP layer processing. User data and the like may be acquired.
- FFT Fast Fourier transform
- IDFT Inverse Discrete Fourier transform
- the transmitting/receiving unit 120 may measure the received signal.
- the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, etc. based on the received signal.
- the measurement unit 123 measures received power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)) , signal strength (for example, Received Signal Strength Indicator (RSSI)), channel information (for example, CSI), and the like may be measured.
- RSRP Reference Signal Received Power
- RSSQ Reference Signal Received Quality
- SINR Signal to Noise Ratio
- RSSI Received Signal Strength Indicator
- channel information for example, CSI
- the transmission path interface 140 transmits and receives signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, etc., and user data (user plane data) for the user terminal 20, control plane data, and the like. Data and the like may be obtained, transmitted, and the like.
- the transmitter and receiver of the base station 10 in the present disclosure may be configured by at least one of the transmitter/receiver 120, the transmitter/receiver antenna 130, and the transmission line interface 140.
- the transmitting/receiving unit 120 determines a Sounding Reference Signal Resource Indicator (SRI) to be applied to the first PUSCH among a plurality of physical uplink shared channels (PUSCH), and , determining the order of SRIs to apply to each PUSCH.
- the control unit 110 may control reception of the plurality of PUSCHs (first to third embodiments).
- FIG. 20 is a diagram illustrating an example of the configuration of a user terminal according to one embodiment.
- the user terminal 20 includes a control section 210 , a transmission/reception section 220 and a transmission/reception antenna 230 .
- One or more of each of the control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided.
- this example mainly shows the functional blocks of the features of 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 unit described below may be omitted.
- the control unit 210 controls the user terminal 20 as a whole.
- the control unit 210 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.
- the control unit 210 may control signal generation, mapping, and the like.
- the control unit 210 may control transmission/reception, measurement, etc. using the transmission/reception unit 220 and the transmission/reception antenna 230 .
- the control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission/reception unit 220 .
- the transmitting/receiving section 220 may include a baseband section 221 , an RF section 222 and a measurement section 223 .
- the baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212 .
- the transmitting/receiving unit 220 can be configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field according to the present disclosure.
- the transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured from a transmission unit and a reception unit.
- the transmission section may be composed of a transmission processing section 2211 and an RF section 222 .
- the receiving section may include a reception processing section 2212 , an RF section 222 and a measurement section 223 .
- the transmitting/receiving antenna 230 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.
- the transmitting/receiving unit 220 may receive the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmitting/receiving unit 220 may transmit the above-described uplink channel, uplink reference signal, and the like.
- the transmitter/receiver 220 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
- digital beamforming eg, precoding
- analog beamforming eg, phase rotation
- the transmission/reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, for data and control information acquired from the control unit 210, for example , 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 and control information acquired from the control unit 210, for example , HARQ retransmission control
- the transmitting/receiving unit 220 (transmission processing unit 2211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), and IFFT processing on a bit string to be transmitted. , precoding, digital-analog conversion, and other transmission processing may be performed, and the baseband signal may be output.
- Whether or not to apply DFT processing may be based on transform precoding settings. Transmitting/receiving unit 220 (transmission processing unit 2211), for a certain channel (for example, PUSCH), if transform precoding is enabled, the above to transmit the channel using the DFT-s-OFDM waveform
- the DFT process may be performed as the transmission process, or otherwise the DFT process may not be performed as the transmission process.
- the transmitting/receiving unit 220 may perform modulation to a radio frequency band, filter processing, amplification, and the like on the baseband signal, and may transmit the radio frequency band signal via the transmitting/receiving antenna 230. .
- the transmitting/receiving section 220 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 230.
- the transmission/reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (error correction) on the acquired baseband signal. decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
- the transmitting/receiving section 220 may measure the received signal.
- the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal.
- the measuring unit 223 may measure received power (eg, RSRP), received quality (eg, RSRQ, SINR, SNR), signal strength (eg, RSSI), channel information (eg, CSI), and the like.
- the measurement result may be output to control section 210 .
- the transmitter and receiver of the user terminal 20 in the present disclosure may be configured by at least one of the transmitter/receiver 220 and the transmitter/receiver antenna 230 .
- the control unit 210 determines a Sounding Reference Signal Resource Indicator (SRI) to be applied to the first PUSCH among a plurality of physical uplink shared channels (PUSCH), The order of SRIs to apply to each PUSCH may be determined.
- the transmitting/receiving unit 220 may transmit the plurality of PUSCHs (first to third embodiments).
- the control unit 210 may determine the SRI to be applied to the first PUSCH and the order of the SRIs to be applied to each PUSCH based on radio resource control signaling (first embodiment).
- the control unit 210 may determine the SRI to be applied to the first PUSCH and the order of the SRIs to be applied to each PUSCH based on media access control elements (second embodiment).
- the control unit 210 may determine the SRI to be applied to the first PUSCH and the order of the SRIs to be applied to each PUSCH based on downlink control information (third embodiment).
- each functional block may be implemented using one device physically or logically coupled, or directly or indirectly using two or more physically or logically separated devices (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices.
- a functional block may be implemented by combining software in the one device or the plurality of devices.
- function includes judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deem , broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
- a functional block (component) that performs transmission may be called a transmitting unit, a transmitter, or the like. In either case, as described above, the implementation method is not particularly limited.
- a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
- FIG. 21 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to one embodiment.
- the base station 10 and 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 each device shown in the figure, or may be configured without some devices.
- processor 1001 may be implemented by one or more chips.
- predetermined software program
- the processor 1001 performs calculations, communication via the communication device 1004 and at least one of reading and writing data in the memory 1002 and the storage 1003 .
- the processor 1001 operates an operating system and controls 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 device, registers, and the like.
- CPU central processing unit
- control unit 110 210
- transmission/reception unit 120 220
- FIG. 10 FIG. 10
- the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them.
- programs program codes
- software modules software modules
- data etc.
- the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be similarly implemented.
- the memory 1002 is a computer-readable recording medium, such as Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or at least any other suitable storage medium. may be configured by one.
- the memory 1002 may also be called a register, cache, main memory (main storage device), or the like.
- the memory 1002 can store executable programs (program code), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.
- the storage 1003 is a computer-readable recording medium, such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital multipurpose disc, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may be configured by Storage 1003 may also be called an auxiliary storage device.
- a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital multipurpose disc, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may be configured by Storage 1003 may also
- the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD), for example. may be configured to include
- the transmitting/receiving unit 120 (220), the transmitting/receiving antenna 130 (230), and the like described above may be realized by the communication device 1004.
- the transmitter/receiver 120 (220) may be physically or logically separated into a transmitter 120a (220a) and a receiver 120b (220b).
- the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
- Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses between devices.
- the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured including hardware, and a part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.
- DSP digital signal processor
- ASIC application specific integrated circuit
- PLD programmable logic device
- FPGA field programmable gate array
- a signal may also be a message.
- a reference signal may be abbreviated as RS, and may also be called a pilot, a pilot signal, etc., depending on the applicable standard.
- a component carrier may also be called a cell, a frequency carrier, a carrier frequency, or the like.
- a radio frame may consist of one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) that make up a radio frame may be called a subframe.
- a subframe may consist of one or more slots in the time domain.
- a subframe may be a fixed time length (eg, 1 ms) independent of numerology.
- a numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
- Numerology for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration , a particular filtering process performed by the transceiver in the frequency domain, a particular windowing process performed by the transceiver in the time domain, and/or the like.
- a slot may consist of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain.
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- a slot may also be a unit of time based on numerology.
- a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) transmitted in time units larger than a minislot may be referred to as PDSCH (PUSCH) Mapping Type A.
- PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.
- Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be read interchangeably.
- one subframe may be called a TTI
- a plurality of consecutive subframes may be called a TTI
- one slot or one minislot may be called a TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms may be Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum scheduling time unit in wireless communication.
- a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis.
- radio resources frequency bandwidth, transmission power, etc. that can be used by each user terminal
- a TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.
- one or more TTIs may be the minimum scheduling time unit. Also, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like.
- a TTI that is shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
- the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
- the short TTI e.g., shortened TTI, etc.
- a TTI having the above TTI length may be read instead.
- a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain.
- the number of subcarriers included in the RB may be the same regardless of the neumerology, eg twelve.
- the number of subcarriers included in an RB may be determined based on neumerology.
- an RB may contain one or more symbols in the time domain and may be 1 slot, 1 minislot, 1 subframe or 1 TTI long.
- One TTI, one subframe, etc. may each be configured with one or more resource blocks.
- One or more RBs are Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB Also called a pair.
- PRB Physical Resource Block
- SCG Sub-Carrier Group
- REG Resource Element Group
- PRB pair RB Also called a pair.
- a resource block may be composed of one or more resource elements (Resource Element (RE)).
- RE resource elements
- 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
- a Bandwidth Part (which may also be called a bandwidth part) represents a subset of contiguous common resource blocks (RBs) for a numerology on a carrier.
- the common RB may be identified by an RB index based on the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
- BWP for UL
- BWP for DL DL BWP
- One or multiple BWPs may be configured for a UE within one carrier.
- At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
- BWP bitmap
- radio frames, subframes, slots, minislots, symbols, etc. described above are merely examples.
- the number of subframes contained in a radio frame, the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc. can be varied.
- the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information. may be represented. For example, radio resources may be indicated by a predetermined index.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of
- information, signals, etc. can be output from a higher layer to a lower layer and/or from a lower layer to a higher layer.
- Information, signals, etc. may be input and output through multiple 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 and output information, signals, etc. may be overwritten, updated or appended. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to other devices.
- Uplink Control Information (UCI) Uplink Control Information
- RRC Radio Resource Control
- MIB Master Information Block
- SIB System Information Block
- SIB System Information Block
- MAC Medium Access Control
- the physical layer signaling may also be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), and the like.
- RRC signaling may also be called an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.
- MAC signaling may be notified using, for example, a MAC Control Element (CE).
- CE MAC Control Element
- notification of predetermined information is not limited to explicit notification, but implicit notification (for example, by not notifying the predetermined information or by providing another information (by notice of
- the determination may be made by a value (0 or 1) represented by 1 bit, or by a boolean value represented by true or false. , may be performed by numerical comparison (eg, comparison with a predetermined value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- the software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) , a server, or other remote source, these wired and/or wireless technologies are included within the definition of transmission media.
- a “network” may refer to devices (eg, base stations) included in a network.
- precoding "precoding weight”
- QCL Quality of Co-Location
- TCI state Transmission Configuration Indication state
- spatialal patial relation
- spatialal domain filter "transmission power”
- phase rotation "antenna port
- antenna port group "layer”
- number of layers Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, “antenna”, “antenna element”, “panel” are interchangeable. can be used as intended.
- base station BS
- radio base station fixed station
- NodeB NodeB
- eNB eNodeB
- gNB gNodeB
- Access point "Transmission Point (TP)”, “Reception Point (RP)”, “Transmission/Reception Point (TRP)”, “Panel”
- a base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.
- a base station can accommodate one or more (eg, three) cells.
- the overall coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area is assigned to a base station subsystem (e.g., a small indoor base station (Remote Radio)). Head (RRH))) may also provide communication services.
- a base station subsystem e.g., a small indoor base station (Remote Radio)). Head (RRH)
- RRH Head
- the terms "cell” or “sector” refer to part or all of the coverage area of at least one of the base stations and base station subsystems that serve communication within such coverage.
- MS Mobile Station
- UE User Equipment
- 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. , a handset, a user agent, a mobile client, a 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 a mobile object, the mobile object itself, or the like.
- the mobile object may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile object (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ).
- at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
- at least one of the base station and 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 as a user terminal.
- communication between a base station and a user terminal is replaced with communication between multiple user terminals (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.)
- the user terminal 20 may have the functions of the base station 10 described above.
- words such as "up” and “down” may be replaced with words corresponding to inter-terminal communication (for example, "side”).
- uplink channels, downlink channels, etc. may be read as side channels.
- user terminals in the present disclosure may be read as base stations.
- the base station 10 may have the functions of the user terminal 20 described above.
- operations that are assumed to be performed by the base station may be performed by its upper node in some cases.
- various operations performed for communication with a terminal may involve the base station, one or more network nodes other than the base station (e.g., Clearly, this can be done by a Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. (but not limited to these) or a combination thereof.
- MME Mobility Management Entity
- S-GW Serving-Gateway
- each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching along with execution. Also, the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in the present disclosure may be rearranged as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using a sample order, and are not limited to the specific order presented.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- LTE-B LTE-Beyond
- 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, an integer or a decimal number)
- 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
- IEEE 802.11 Wi-Fi®
- IEEE 802.16 WiMAX®
- IEEE 802.20 Ultra-WideBand (UWB), Bluetooth®, or other suitable wireless It may be applied to systems using communication methods, next-generation systems extended based on these, and the like. Also, multiple systems may be applied to systems using communication methods, next-generation systems extended based on these, and the like
- any reference to elements using the "first,” “second,” etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, references to first and second elements do not imply that only two elements may be employed or that the first element must precede the second element in any way.
- determining includes judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry ( For example, looking up in a table, database, or another data structure), ascertaining, etc. may be considered to be “determining.”
- determining (deciding) includes receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access ( accessing (e.g., accessing data in memory), etc.
- determining is considered to be “determining” resolving, selecting, choosing, establishing, comparing, etc. good too. That is, “determine (determine)” may be regarded as “determining (determining)” some action.
- connection refers to any connection or coupling, direct or indirect, between two or more elements. and can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other. Couplings or connections between elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
- radio frequency domain when two elements are connected, using one or more wires, cables, printed electrical connections, etc., and as some non-limiting and non-exhaustive examples, radio frequency domain, microwave They can be considered to be “connected” or “coupled” together using the domain, electromagnetic energy having wavelengths in the optical (both visible and invisible) domain, and the like.
- a and B are different may mean “A and B are different from each other.”
- the term may also mean that "A and B are different from C”.
- Terms such as “separate,” “coupled,” etc. may also be interpreted in the same manner as “different.”
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Rel.15では、データ送信において繰り返し送信がサポートされている。例えば、基地局(ネットワーク(NW)、gNB)は、DLデータ(例えば、下り共有チャネル(PDSCH))の送信を所定回数だけ繰り返して行う。あるいは、UEは、ULデータ(例えば、上り共有チャネル(PUSCH))の送信を所定回数だけ繰り返して行う。
・時間領域リソース(例えば、開始シンボル、各スロット内のシンボル数等)の割り当て、
・周波数領域リソース(例えば、所定数のリソースブロック(RB:Resource Block)、所定数のリソースブロックグループ(RBG:Resource Block Group))の割り当て、
・変調及び符号化方式(MCS:Modulation and Coding Scheme)インデックス、
・PUSCHの復調用参照信号(DMRS:Demodulation Reference Signal)の構成(configuration)、
・PUSCHの空間関係情報(spatial relation info)、又は送信構成指示(TCI:Transmission Configuration Indication又はTransmission Configuration Indicator)の状態(TCI状態(TCI-state))。
PUSCH送信に対して繰り返し送信タイプBを適用する場合、PUSCH送信に利用できないシンボル(又は、シンボルパターン)に関する情報をUEに通知することも検討されている。PUSCH送信に利用できないシンボルパターンは、無効シンボルパターン、Invalid symbol pattern、インバリッドシンボルパターン等と呼ばれてもよい。
繰り返し送信タイプBを適用してサブスロット単位で繰り返し送信が行われる場合、繰り返し係数(K)及びデータの割当て単位等によっては、ある繰り返し送信がスロット境界(slot-boundary)をクロス(cross)するケースが生じる。
Rel.15 NRにおいて、UEは、測定用参照信号(例えば、サウンディング参照信号(Sounding Reference Signal(SRS)))の送信に用いられる情報(SRS設定情報、例えば、RRC制御要素の「SRS-Config」内のパラメータ)を受信してもよい。
Rel.16において、コードブックベースのPUSCH送信のための、送信プリコーディング行列インジケータ(Transmitted Precoding Matrix Indicator(TPMI))及び送信ランクが、下りリンク制御情報(例えば、DCIフォーマット0_1)に含まれる特定のフィールド(例えば、プリコーディング情報及びレイヤ数フィールド)によって指定されることが検討されている。
NRでは、1つ又は複数の送受信ポイント(Transmission/Reception Point(TRP))(マルチTRP)が、1つ又は複数のパネル(マルチパネル)を用いて、UEに対してDL送信を行うことが検討されている。また、UEが、1つ又は複数のTRPに対してUL送信を行うことが検討されている(図4参照)。
UEに対して指示/通知される複数のSRIフィールドのうち、各SRIフィールドに「適用されないコードポイント」が含まれる。UEは、複数のSRIフィールドのそれぞれにおいて、適用されないコードポイントが指示されるかに基づいて、単一TRP向けの繰り返し送信又は複数TRP向けの繰り返し送信のいずれかを行うことを決定する。
UEは、DCIに含まれる特定のフィールドに基づいて、単一TRP向けの繰り返し送信又は複数TRP向けの繰り返し送信のいずれかを行うことを決定する。当該特定のフィールドは、コードブックベースのPUSCHにおけるTPMIを指示するフィールド(TPMIフィールド)であってもよいし、ノンコードブックベースのPUSCHにおけるSRIを指示するフィールド(SRIフィールド)であってもよいし、Rel.17以降規定される新たな特定フィールドであってもよい。
UEは、複数TRP向けのPUSCHの繰り返し送信を行うことを決定するとき、複数のSRIと、複数の繰り返し送信とが、特定のルールに基づいて対応することを判断してもよい。当該ルールは、マッピングパターン、マッピングルール、対応パターン、対応関係、などと呼ばれてもよい。
<第1の実施形態>
第1の実施形態では、利用する複数の(例えば、2つの)TRPの順序の動的なスイッチ(変更)が行われなくてもよい。言い換えると、仕様上、複数TRPの順序の動的なスイッチがサポートされなくてもよい。
第1の実施形態において、特定のSRIフィールド/SRSリソースセット/TRPが、「第1のビーム」であると予め定義(predefined)/固定(fixed)されていると、UEは想定(assume、expect)してもよい。当該特定のSRIフィールド/SRSリソースセット/TRPは、最小のインデックス/最大のインデックス/x番目(xは整数)のインデックスを有するSRIフィールド/SRSリソースセット/TRPであってもよいし、最初に/最後に/x番目に位置するSRIフィールド/SRSリソースセット/TRPであってもよい。
第1の実施形態において、UEは、「第1のビーム」として設定されるSRIフィールド/SRSリソースセット/TRPの情報を、上位レイヤシグナリング(例えば、RRCシグナリング)によって通知されてもよい。
[オプション1の変形例]
UEに対して、1つのSRIフィールドが通知されてもよい。UEは当該1つのSRIフィールドに基づいて、単一TRP向けの繰り返し送信又は複数TRP向けの繰り返し送信のいずれかを行うことを決定してもよい。
第2の実施形態では、UEは、いずれのSRIフィールド/SRSリソースセット/TRPが「第1のビーム」であるかを、MAC CEで指示/更新されてもよい。
UEに対して通知されるMAC CEに、いずれのSRIフィールド/SRSリソースセット/TRPが「第1のビーム」であるかを指示する指示フィールドが含まれてもよい。
いずれのSRIフィールド/SRSリソースセット/TRPが「第1のビーム」であるかを指示する指示フィールドは、SRSのアクティベーション/ディアクティベーションに利用されるMAC CEに含まれてもよい。また、当該指示フィールドは、SRSの空間関係を指示するMAC CEに含まれてもよい。
第3の実施形態では、UEは、いずれのSRIフィールド/SRSリソースセット/TRPが「第1のビーム」であるかを、DCIで指示されてもよい。
いずれのSRIフィールド/SRSリソースセット/TRPが「第1のビーム」であるかを指示する指示フィールドは、単一のPUSCH送信/単一TRP向けのPUSCHの繰り返し送信と、複数TRP向けのPUSCHの繰り返し送信との、動的なスイッチに使用されるDCIフィールドに含まれてもよい(又は、当該DCIフィールドと同じであってもよい)。言い換えれば、UEは、特定のDCIフィールドに基づいて、単一のPUSCH送信/単一TRP向けのPUSCHの繰り返し送信と、複数TRP向けのPUSCHの繰り返し送信との、いずれかを行うか、及び、複数TRP向けのPUSCHの繰り返し送信を行う場合には、いずれのSRIフィールド/SRSリソースセット/TRPが「第1のビーム」であるかを、判断/決定してもよい。
いずれのSRIフィールド/SRSリソースセット/TRPが「第1のビーム」であるかを指示する指示フィールドが、単一のPUSCH送信/単一TRP向けのPUSCHの繰り返し送信と、複数TRP向けのPUSCHの繰り返し送信との、動的なスイッチに使用されるDCIフィールドと別々に(独立して)設定されてもよい。言い換えれば、UEは、第1のDCIフィールドに基づいて、単一のPUSCH送信/単一TRP向けのPUSCHの繰り返し送信と、複数TRP向けのPUSCHの繰り返し送信との、いずれかを行うかを判断し、次いで、複数TRP向けのPUSCHの繰り返し送信を行う場合には、第2のDCIフィールドに基づいて、いずれのSRIフィールド/SRSリソースセット/TRPが「第1のビーム」であるかを、判断/決定してもよい。
第4の実施形態では、UEは、複数TRP向けのPUSCHの繰り返し送信を指示され、複数の(例えば、2つの)SRIフィールド/TPMIフィールド/TPCコマンドフィールドを指示されるとき、特定のルールに基づいて、PUSCHの繰り返し送信と、TPMIフィールド/TPCコマンドフィールドとの対応関係を判断してもよい。当該特定のルールは、以下に記載する実施形態4-1及び実施形態4-2の少なくとも1つに従ってもよい。
複数のSRIフィールド/TPMIフィールド/TPCコマンドフィールドのそれぞれは、1対1で対応してもよい。言い換えれば、x番目(xは整数)のインデックスを有するTPMIフィールド/TPCコマンドフィールドが、x番目のインデックスを有するSRIフィールド/SRSリソースセットフィールド/TRPと対応してもよい。
複数のTPMIフィールド/TPCコマンドフィールドと、PUSCHの繰り返し送信との対応は、マッピングパターンに基づいて決定されてもよい。言い換えれば、上述した循環的マッピング、逐次的マッピング及びハーフ-ハーフパターンの少なくとも1つにしたがって、複数のTPMIフィールド/TPCコマンドフィールドと、PUSCHの繰り返し送信との対応が決定されてもよい。
第5の実施形態において、本開示の各実施形態に関連するUE能力(UE capability)について説明する。UEは、当該能力を有するかに関して、NWに報告(送信)してもよい。
以下、本開示の一実施形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本開示の上記各実施形態に係る無線通信方法のいずれか又はこれらの組み合わせを用いて通信が行われる。
図19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20は、一実施形態に係るユーザ端末の構成の一例を示す図である。ユーザ端末20は、制御部210、送受信部220及び送受信アンテナ230を備えている。なお、制御部210、送受信部220及び送受信アンテナ230は、それぞれ1つ以上が備えられてもよい。
なお、上記実施形態の説明に用いたブロック図は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
なお、本開示において説明した用語及び本開示の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル、シンボル及び信号(シグナル又はシグナリング)は、互いに読み替えられてもよい。また、信号はメッセージであってもよい。参照信号(reference signal)は、RSと略称することもでき、適用される標準によってパイロット(Pilot)、パイロット信号などと呼ばれてもよい。また、コンポーネントキャリア(Component Carrier(CC))は、セル、周波数キャリア、キャリア周波数などと呼ばれてもよい。
Claims (6)
- 複数の上りリンク共有チャネル(Physical Uplink Shared Channel(PUSCH))のうち、最初のPUSCHに対して適用するサウンディング参照信号リソースインジケータ(Sounding Reference Signal Resource Indicator(SRI))を決定し、各PUSCHに適用するSRIの順序を決定する制御部と、
前記複数のPUSCHを送信する送信部と、を有する端末。 - 前記制御部は、無線リソース制御シグナリングに基づいて、前記最初のPUSCHに対して適用する前記SRIと、前記各PUSCHに適用するSRIの順序を決定する請求項1に記載の端末。
- 前記制御部は、メディアアクセス制御制御要素に基づいて、前記最初のPUSCHに対して適用する前記SRIと、前記各PUSCHに適用するSRIの順序を決定する請求項1に記載の端末。
- 前記制御部は、下りリンク制御情報に基づいて、前記最初のPUSCHに対して適用する前記SRIと、前記各PUSCHに適用するSRIの順序を決定する請求項1に記載の端末。
- 複数の上りリンク共有チャネル(Physical Uplink Shared Channel(PUSCH))のうち、最初のPUSCHに対して適用するサウンディング参照信号リソースインジケータ(Sounding Reference Signal Resource Indicator(SRI))を決定し、各PUSCHに適用するSRIの順序を決定するステップと、
前記複数のPUSCHを送信するステップと、を有する端末の無線通信方法。 - 複数の上りリンク共有チャネル(Physical Uplink Shared Channel(PUSCH))のうち、最初のPUSCHに対して適用するサウンディング参照信号リソースインジケータ(Sounding Reference Signal Resource Indicator(SRI))の決定、および、各PUSCHに適用するSRIの順序の決定、に用いられる情報を送信する送信部と、
前記複数のPUSCHの受信を制御する制御部と、を有する基地局。
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