Terminals, wireless communication methods, base stations and systems

Abstract

A terminal that is an aspect of this disclosure has: a reception unit that receives one downlink control information (DCI) for at least one physical uplink shared channel (PUSCH); and a control unit that controls the application of transmitted precoding matrix indicators (TPMI) and transmission ranks to a plurality of PUSCH transmissions that use a plurality of SRS resource indicators (SRI) or at least one PUSCH transmission that uses a single SRI, controlling same on the basis of a TPMI for the PUSCH and at least one piece of information indicating the transmission rank, which are included in the DCI. An aspect of this disclosure makes it possible to appropriately control the repetitive transmission of PUSCH even when multi-TRP is applied.

Description

Technical Field

[0001] This disclosure relates to a terminal and a wireless communication method in a next-generation mobile communication system 、 Base station and system and is concerned with them.

Background Art

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) was specified for the purpose of further high data rates, low latency, etc. (Non-Patent Document 1). Also, for the purpose of further large capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9), LTE-Advanced (3GPP Rel. 10-14) was specified.

[0003] Successor systems to LTE (for example, also referred to as 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later, etc.) are also being considered.

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

Summary of the Invention

[0005] 3GPP Rel.15 supports repeated transmissions on UL data channels (e.g., Physical Uplink Shared Channels (PUSCH)). The UE controls the transmission of PUSCHs across multiple slots (e.g., K consecutive slots) based on a repeat factor K set by the network (e.g., base station). In other words, when repeated transmissions are performed, each PUSCH is transmitted in a different slot (e.g., per slot).

[0006] On the other hand, in Rel.16 and later, when repeatedly transmitting PUSCH signals, it is being considered to transmit multiple PUSCH signals within a single slot. In other words, each PUSCH signal will be transmitted in units shorter than a slot (for example, in sub-slot units or mini-slot units).

[0007] Furthermore, in Rel.16 and later, dynamic switching between single PUSCH transmissions and repeated PUSCH transmissions is being considered.

[0008] Furthermore, NR is considering communication using one or more transmission / reception points (TRPs) (multi-TRPs).

[0009] However, current NR specifications have not adequately addressed how to control repeated transmissions of PUSCH signals in multi-panel / TRP environments. If repeated transmissions of PUSCH signals in multi-TRP environments are not properly handled, it may lead to reduced throughput or degraded communication quality.

[0010] Therefore, this disclosure provides a terminal and wireless communication method that can appropriately control PUSCH repeated transmission. 、 base station and system One of the objectives is to provide [this]. [Means for solving the problem]

[0011] A terminal relating to one aspect of this disclosure is A transmitting unit transmits capability information indicating that it supports different first upper layer parameters for a first physical uplink sharing channel (PUSCH) repeated transmission using a single transmit / receive point (TRP) and a second upper layer parameter for a second PUSCH repeated transmission using multiple TRPs, and the first PUSCH Repeat transmission or the second PUSCH repeat transmission One downlink control information for News( DCI )of The receiving unit that receives and the DCI included , send Faith precoding matrix indicator Ta( TPMI ) and Specify the transmission rank. 1 Based on the above information, The first repeated PUSCH transmission or the second repeated PUSCH transmission A control unit that controls the application of TPMI and transmission rank to the ru. [Effects of the Invention]

[0012] According to one aspect of this disclosure, PUSCH repeated transmissions can be appropriately controlled even when multi-TRP is applied. [Brief explanation of the drawing]

[0013] [Figure 1] Figures 1A and 1B show an example of repeated transmission of PUSCH. [Figure 2] Figures 2A and 2B show examples of invalid symbol patterns. [Figure 3] Figures 3A and 3B show examples of nominal repetitions and actual repetitions. [Figure 4] Figure 4 shows an example of repeated transmission of PUSCH in a multi-TRP. [Figure 5] Figure 5 shows an example of setting the maximum value of the transmission rank according to the first embodiment. [Figure 6] Figures 6A-6C show an example of TPMI instructions according to the second embodiment. [Figure 7]FIG. 7A - FIG. 7C are diagrams showing other examples of TPMI instructions according to the second embodiment. [Figure 8] FIG. 8 is a diagram showing an example of the schematic configuration of a wireless communication system according to an embodiment. [Figure 9] FIG. 9 is a diagram showing an example of the configuration of a base station according to an embodiment. [Figure 10] FIG. 10 is a diagram showing an example of the configuration of a user terminal according to an embodiment. [Figure 11] FIG. 11 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment.

MODE FOR CARRYING OUT THE INVENTION

[0014] (Repeated Transmission) In Rel. 15, repeated transmission is supported in data transmission. For example, a base station (network (NW), gNB) repeatedly transmits DL data (e.g., downlink shared channel (PDSCH)) a predetermined number of times. Alternatively, the UE repeatedly transmits UL data (e.g., uplink shared channel (PUSCH)) a predetermined number of times.

[0015] FIG. 1A is a diagram showing an example of repeated transmission of PUSCH. In FIG. 1A, an example in which a predetermined number of repeated PUSCHs are scheduled by a single DCI is shown. The number of repetitions is also called a repetition factor K or an aggregation factor K.

[0016] In FIG. 1A, the repetition factor K = 4, but the value of K is not limited to this. Also, the nth repetition may be also called the nth transmission occasion, etc., and may be identified by a repetition index k (0 ≦ k ≦ K - 1). Also, in FIG. 1A, repeated transmission of PUSCH (e.g., dynamically scheduled PUSCH based on dynamic grant) is shown, but it may be applied to repeated transmission of configured grant-based PUSCH.

[0017] For example, in Figure 1A, the UE receives information indicating the repetition coefficient K (e.g., aggregationFactorUL or aggregationFactorDL) quasi-statically via upper-layer signaling. Here, the upper-layer signaling may be any of the following, or a combination thereof: RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information, etc.

[0018] MAC signaling may use, for example, MAC control elements (MAC CEs) or MAC Protocol Data Units (MAC PDUs). Broadcast information may also be, for example, Master Information Blocks (MIBs), System Information Blocks (SIBs), or Remaining Minimum System Information (RMSIs).

[0019] The UE controls the receive processing of PDSCH (e.g., at least one of receive, demapping, demodulation, or decoding) or the transmit processing of PUSCH (e.g., transmit, mapping, modulation, or coding) in K consecutive slots based on at least one of the following field values ​​in DCI (or the information indicated by that field value): • Allocation of time domain resources (e.g., starting symbol, number of symbols in each slot, etc.) • Allocation of frequency domain resources (e.g., a predetermined number of resource blocks (RB), a predetermined number of resource block groups (RBG)), • Modulation and Coding Scheme (MCS) Index • Configuration of the Demodulation Reference Signal (DMRS) for Push. • The spatial relation information of PUSCH, or the status of the Transmission Configuration Indication (TCI) or Transmission Configuration Indicator (TCI-state).

[0020] The same symbol assignment may be applied to K consecutive slots. Figure 1A shows the case where PUSCH in each slot is assigned to a predetermined number of symbols from the beginning of the slot. The same symbol assignment between slots may be determined as described in the time-domain resource assignment section above.

[0021] For example, the UE may determine the symbol assignment in each slot based on the starting symbol S and the number of symbols L (e.g., Start and Length Indicator (SLIV)) determined based on the value m of a predetermined field in the DCI (e.g., the TDRA field). Alternatively, the UE may determine the first slot based on K2 information determined based on the value m of a predetermined field in the DCI (e.g., the TDRA field).

[0022] On the other hand, among the K consecutive slots, the Redundancy Version (RV) applied to the TB based on the same data may be the same, or at least partially different. For example, the RV applied to the TB in the nth slot (transmission opportunity, repetition) may be determined based on the value of a predetermined field in the DCI (e.g., the RV field).

[0023] If resources allocated in K consecutive slots have a different communication direction in at least one symbol from the UL, DL, or Flexible of each slot specified by at least one of the upper and lower link communication direction indication information for TDD control (e.g., "TDD-UL-DL-ConfigCommon" or "TDD-UL-DL-ConfigDedicated" in the RRC IE) and the Slot format indicator in DCI (e.g., DCI format 2_0), the resources in the slot containing that symbol may not be transmitted (or received).

[0024] In Rel.15, PUSCH is repeatedly transmitted across multiple slots (in units of slots) as shown in Figure 1A, but in Rel.16 and later, it is expected that PUSCH will be repeatedly transmitted in units shorter than a slot (for example, in units of sub-slots, mini-slots, or a predetermined number of symbols) (see Figure 1B).

[0025] In Figure 1B, the repetition coefficient K=4, but the value of K is not limited to this. The nth repetition is also called the nth transmission occasion and may be identified by a repetition index k (0≦k≦K-1). Furthermore, while Figure 1B shows repeated transmissions of a dynamically scheduled PUSCH in DCI (e.g., a dynamic grant-based PUSCH), it may also be applied to repeated transmissions of a configured grant-based PUSCH.

[0026] The UE may determine the symbol assignment for a PUSCH transmission (e.g., a PUSCH with k=0) in a predetermined slot based on the start symbol S and the number of symbols L (e.g., StartSymbol and length) determined based on the value m of a predetermined field (e.g., the TDRA field) in the DCI of the PUSCH. The UE may also determine the predetermined slot based on Ks information determined based on the value m of a predetermined field (e.g., the TDRA field) in the DCI.

[0027] The UE may dynamically receive information indicating the repetition coefficient K (e.g., numberofrepetitions) via downstream control information. The repetition coefficient may be determined based on the value m of a predetermined field in the DCI (e.g., the TDRA field). For example, a table may be supported that defines the correspondence between bit values ​​notified in the DCI and the repetition coefficient K, the starting symbol S, and the number of symbols L.

[0028] The slot-based repetition transmission shown in Figure 1A may be called repetition type A (e.g., PUSCH repetition Type A), and the sub-slot-based repetition transmission shown in Figure 1B may be called repetition type B (e.g., PUSCH repetition Type B).

[0029] The UE may be configured to apply at least one of repetition type A and repetition type B. For example, the base station may notify the UE of the repetition type to be applied by the UE through higher-layer signaling (e.g., PUSCHRepTypeIndicator).

[0030] For each DCI format used to schedule a PUSCH, either recurring transmission type A or recurring transmission type B may be set as the UE.

[0031] For example, if the upper layer signaling (e.g., PUSCHRepTypeIndicator-AorDCIFormat0_1) is set to recurring transmission type B (e.g., PUSCH-RepTypeB) for a first DCI format (e.g., DCI format 0_1), the UE applies recurring transmission type B to PUSCH recurring transmissions scheduled for the first DCI format. Otherwise (e.g., if PUSCH-RepTypeB is not set, or if PUSCH-RepTypeA is set), the UE applies recurring transmission type A to PUSCH recurring transmissions scheduled for the first DCI format.

[0032] Furthermore, in Rel.16 and later, dynamic switching between single PUSCH transmissions and repeated PUSCH transmissions is being considered.

[0033] When a higher-layer parameter for time domain allocation of a PUSCH is set for the UE (e.g., push-TimeDomainAllocationListDCI-0-1-r16 or push-TimeDomainAllocationListDCI-0-2-r16), the number of repetitions (e.g., 1, 2, 3, 4, 7, 8, 12, or 16) may be set by a parameter for the number of PUSCH repetitions included in that higher-layer parameter (e.g., numberOfRepetitions-r16). The UE may determine the number of PUSCH repetitions scheduled by the DCI based on the DCI's time domain resource allocation field. When the number of repetitions is set / specified as 1, the UE may make a single PUSCH transmission.

[0034] (Invalid symbol pattern) When applying repeat transmission type B to a PUSCH transmission, it is also being considered to notify the UE of information regarding symbols (or symbol patterns) that cannot be used for PUSCH transmissions. Symbol patterns that cannot be used for PUSCH transmissions may also be called invalid symbol patterns, invalid symbol patterns, etc.

[0035] It is being considered to notify invalid symbol patterns using at least one of upper-layer signaling and DCI. The DCI may be a predetermined DCI format (for example, at least one of DCI formats 0_1 and 0_2).

[0036] For example, the first upper-layer parameter is used to notify the UE of invalid symbol patterns that cannot be used for PUSCH transmission. Alternatively, the DCI may be used to notify the UE whether or not to apply the information regarding the invalid symbol patterns. In this case, a bit field (a field for notifying whether or not to apply the invalid symbol pattern) may be set in the DCI to indicate whether or not to apply the information regarding the invalid symbol patterns.

[0037] Furthermore, the UE may be notified of the presence or absence of notification fields (or additional bits) in the DCI using a second higher-layer parameter. In other words, if the UE is notified of information regarding an invalid symbol pattern by the first higher-layer parameter, it may decide whether or not to apply the information regarding that invalid symbol pattern based on the second higher-layer parameter and the DCI.

[0038] If the first upper layer parameter is not notified or set, the UE may control the transmission of PUSCH without considering invalid symbol patterns. If the first upper layer parameter is notified or set, the UE may determine whether to apply invalid symbol patterns based on the second upper layer parameter and DCI. For example, if the second upper layer parameter instructs the DCI to add an additional bit (or a predetermined field) indicating whether to apply invalid symbol patterns, the UE may determine whether to apply invalid symbol patterns based on that predetermined field.

[0039] The first upper-layer parameter can be any information that notifies of a symbol pattern that is invalid for PUSCH transmission, and may be in the form of a bitmap, for example (see Figure 2A). Figure 2A shows an example where the invalid symbol pattern is defined as a bitmap (1-D bitmap) in the time domain. Based on the information about the invalid symbol pattern, the UE may determine the resources available for PUSCH transmission in one or more frequency bandwidths (e.g., BWP) (see Figure 2B).

[0040] This example shows how to apply one or a common invalid symbol pattern to multiple BWPs, but different invalid symbol patterns may be set or applied to each BWP.

[0041] (Nominal repetitions / Actual repetitions) When repeat transmission type B is applied and repeated transmission is performed on a sub-slot basis, depending on the repetition coefficient (K) and the data allocation unit, there may be cases where a certain repeat transmission crosses the slot boundary.

[0042] Figure 3A shows an example of applying repeat transmission type B when the repetition coefficient (K) is 4 and the push length (L) is 4. In Figure 3A, a push with k=3 is placed across a slot boundary. In such a case, the push may be divided (or segmented) based on the slot boundary for transmission (see Figure 3B).

[0043] Furthermore, it is conceivable that a slot may contain symbols that cannot be used for PUSCH transmission (e.g., DL symbols or invalid symbols). Figure 3A shows a case where some of the symbols in which k=1 PUSCH is placed contain symbols that cannot be used for that PUSCH transmission (in this case, DL symbols). In such cases, the PUSCH transmission may be performed using symbols excluding the DL symbol (see Figure 3B).

[0044] If a PUSCH assignment symbol includes DL symbols (or invalid symbols) in all symbols except those at the ends, the PUSCH transmission may be performed using the symbols other than the DL symbol portion. In this case, the PUSCH may be split (or segmented).

[0045] Figure 3B shows the case in subslot-based repeat transmission where a PUSCH of k=1 (Rep#2) is split into two by the DL symbol (Rep#2-1 and #2-2), and a PUSCH of k=3 (Rep#4) is split into two by the slot boundary (Rep#4-1 and #4-2).

[0046] Note that repeated transmissions before considering DL symbols, invalid symbols, or slot boundaries (Figure 3A) may be called nominal repetitions. Repeated transmissions that take DL symbols, invalid symbols, or slot boundaries into consideration (Figure 3B) may be called actual repetitions.

[0047] (Spatial relations for SRS and PUSCH) In Rel.15 NR, the UE may receive information used to transmit a measurement reference signal (e.g., a Sounding Reference Signal (SRS)) (e.g., SRS configuration information, such as parameters in the "SRS-Config" of the RRC control element).

[0048] Specifically, the UE may receive at least one of the following: information about one or more SRS resource sets (SRS resource set information, e.g., "SRS-ResourceSet" of the RRC control element) and information about one or more SRS resources (SRS resource information, e.g., "SRS-Resource" of the RRC control element).

[0049] A single 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 Identifier.

[0050] SRS resource set information may include an SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type (e.g., one of Periodic SRS, Semi-Persistent SRS, or Aperiodic SRS), and information on the usage of the SRS.

[0051] Here, the SRS resource type may be one of the following: Periodic SRS (P-SRS), Semi-Persistent SRS (SP-SRS), or Aperiodic CSI (A-SRS). The UE may send P-SRS and SP-SRS periodically (or periodically after activation), and A-SRS based on DCI's SRS request.

[0052] Furthermore, the application (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") may include, for example, beam management, codebook (CB), noncodebook (NCB), antenna switching, etc. SRS for codebook or noncodebook applications may be used to determine the precoder for codebook-based or noncodebook-based PUSCH transmissions based on SRI.

[0053] For example, in the case of codebook-based transmission, the UE may determine the precoder for PUSCH transmission based on the SRI, Transmitted Rank Indicator (TRI), and Transmitted Precoding Matrix Indicator (TPMI). In the case of non-codebook-based transmission, the UE may determine the precoder for PUSCH transmission based on the SRI.

[0054] SRS resource information may include SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, transmit comb, SRS resource mapping (e.g., time and / or frequency resource location, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.), hopping-related information, SRS resource type, sequence ID, SRS spatial relationship information, etc.

[0055] The spatial relationship information of the SRS (for example, the "spatialRelationInfo" element of the RRC information element) may indicate spatial relationship information between a predetermined reference signal and the SRS. The predetermined reference signal may be at least one of a Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, a Channel State Information Reference Signal (CSI-RS), and an SRS (for example, another SRS). The SS / PBCH block may be called a Synchronization Signal Block (SSB).

[0056] The spatial relationship information of the SRS may include at least one of the following as an index for the predetermined reference signal: the SSB index, the CSI-RS resource ID, and the SRS resource ID.

[0057] In this disclosure, the terms SSB index, SSB resource ID, and SSB Resource Indicator (SSBRI) may be interpreted interchangeably. Similarly, the terms CSI-RS index, CSI-RS resource ID, and CSI-RS Resource Indicator (CRI) may be interpreted interchangeably. Furthermore, the terms SRS index, SRS resource ID, and SRI may be interpreted interchangeably.

[0058] The spatial relationship information of the SRS may include a serving cell index, BWP index (BWP ID), etc., corresponding to the predetermined reference signal mentioned above.

[0059] If a UE configures spatial relationship information regarding an SSB or CSI-RS and an SRS resource, it may transmit the SRS resource using the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter (spatial domain receive filter) used for receiving the SSB or CSI-RS. In this case, the UE may assume that the UE receive beam for the SSB or CSI-RS and the UE transmit beam for the SRS are the same.

[0060] If a UE sets spatial relationship information regarding a target SRS resource and another SRS (reference SRS), it may transmit the target SRS resource using the same spatial domain filter (spatial domain transmit filter) as the one used for transmitting the reference SRS. In other words, in this case, the UE may assume that the UE transmit beam for the reference SRS and the UE transmit beam for the target SRS are the same.

[0061] The UE may determine the spatial relationships of the PUSCH scheduled by the DCI (e.g., DCI format 0_1) based on the value of a predetermined field (e.g., the SRS resource identifier (SRI) field). Specifically, the UE may use spatial relationship information of the SRS resource (e.g., "spatialRelationInfo" of the RRC information element) determined based on the value of the predetermined field (e.g., SRI) for the PUSCH transmission.

[0062] When using codebook-based transmission for PUSCH, the UE may configure two SRS resources per SRS resource set via RRC, and one of the two SRS resources may be indicated by DCI (1-bit SRI field). When using non-codebook-based transmission for PUSCH, the UE may configure four SRS resources per SRS resource set via RRC, and one of the four SRS resources may be indicated by DCI (2-bit SRI field).

[0063] (TPMI and transmission rank) In Rel.16, it is considered that for codebook-based PUSCH transmissions, the Transmitted Precoding Matrix Indicator (TPMI) and transmit rank are specified by specific fields (e.g., precoding information and layer number field) included in the downlink control information (e.g., DCI format 0_1). In this disclosure, rank may be interpreted as layer.

[0064] The precoder used by the UE for codebook-based PUSCH transmission may be selected from uplink codebooks having the same number of antenna ports as the value set by the higher-layer parameter (e.g., nrofSRS-Ports) configured for the SRS resource.

[0065] The size (number of bits) of the particular field is variable, depending on the number of antenna ports for PUSCH (e.g., the number of ports indicated by nrofSRS-Ports above) and several higher-layer parameters.

[0066] The specific field may be 0 bits if the higher-layer parameter (e.g., txConfig) set for the UE is set to non-codebook.

[0067] Furthermore, this particular field may be 0 bits if a higher-layer parameter (e.g., txConfig) set for the UE is set in the codebook for a single antenna port.

[0068] Furthermore, the specific field may have a bit length of 2 to 6 bits for each of the four antenna ports, based on at least one of the following: a higher-layer parameter set for the UE (e.g., txConfig) is set in the codebook, and the presence or absence of a transform precoder (enabled or disabled).

[0069] Furthermore, the specific field may have a bit length of 1 to 4 bits for two antenna ports, based on at least one of the following: a higher-layer parameter set for the UE (e.g., txConfig) is set in the codebook, and the presence or absence of a transform precoder (enabled or disabled).

[0070] The other higher-layer parameter may be at least one of the following: a parameter for specifying the UL's full-power transmission mode (e.g., ul-FullPowerTransmission, ul-FullPowerTransmission-r16), a parameter indicating the maximum transmission rank of the UL (e.g., maxRank), a parameter indicating a subset of a certain precoding matrix indicator (PMI) (e.g., codebookSubset), or a parameter for specifying a transform precoder (e.g., transformPrecoder).

[0071] (Multi-TRP) In NR, it is being considered that one or more transmission / reception points (TRPs) (multi-TRPs) will use one or more panels (multi-panels) to perform DL transmissions to the UE. Furthermore, it is being considered that the UE will perform UL transmissions to one or more TRPs (see Figure 4).

[0072] Multiple TRPs may correspond to the same cell identifier (Cell Identifier (ID)) or to different cell IDs. This cell ID may be a physical cell ID or a virtual cell ID.

[0073] Incidentally, in NRs Rel.17 and later, there is consideration being given to using a single DCI to instruct multiple (e.g., two) SRI / TPMIs for repeated push transmissions of multiple TRPs.

[0074] If a single DCI points to multiple TPMIs, the following options 1 or 2 are possible: Option 1: Use a field to indicate multiple (e.g., two) TPMIs, so that TPMI (values) for multiple (e.g., two) TRPs are indicated. Option 2: A field is designated to indicate one TPMI, and that field is set with code points corresponding to multiple (e.g., two) TPMI values.

[0075] In Option 1, each code point of multiple TPMI fields may correspond to a single TPMI value. The correspondence (association) between TPMI fields and TPMI values ​​may be defined in advance in the specification. Furthermore, the correspondence (association) between TPMI fields and TPMI values ​​may use the correspondences defined up to Rel. 16, or the correspondences defined in Rel. 17 and later. The correspondence between TPMI fields and TPMI values ​​may differ for each of the multiple TPMI fields.

[0076] In Option 2, a code point indicated by one TPMI field may correspond to multiple (e.g., two) TPMI values. The correspondence (association) between TPMI fields and TPMI values ​​may be defined in advance by the specification, or it may be notified / configured / activated by RRC signaling / MAC CE.

[0077] On the other hand, instructing multiple TPMIs may increase the signaling overhead of DCI. In NRs Rel.17 and later, to suppress this increase in DCI overhead, it has been considered to limit the transmission rank of PUSCH in repeated transmissions of PUSCH using multiple TRPs. For example, it has been considered to limit the maximum transmission rank of PUSCH in repeated transmissions of PUSCH using multiple TRPs to a specific value (e.g., 2) or the number of candidate TPMI values. If the maximum transmission rank of each PUSCH transmission using multiple TRPs is limited, the number of DCI fields required for repeated transmissions of PUSCH using multiple TRPs can be reduced.

[0078] However, in situations where the use of a single TRP and multiple TRPs are dynamically switched, the maximum rank / candidate TPMI value for repeated transmissions by PUSCH using multiple TRPs is limited, and the method of instructing the UE to this limited maximum rank / candidate TPMI value is not sufficiently considered.

[0079] More specifically, in situations where the use of a single TRP and multiple TRPs is dynamically switched, if the maximum rank / candidate TPMI value for repeated transmissions of a PUSCH using multiple TRPs is limited (for example, if the maximum rank is limited to a specific number (e.g., 2)), there is insufficient consideration of whether the maximum rank / candidate TPMI value for a single PUSCH transmission / repeated transmission of a PUSCH using a single TRP is the same as or different from the maximum rank / candidate TPMI value for repeated transmissions of a PUSCH using multiple TRPs.

[0080] Furthermore, if the maximum rank / candidate TPMI value for a single PUSCH transmission / repeated PUSCH transmission using a single TRP differs from the maximum rank / candidate TPMI value for a repeated PUSCH transmission using multiple TRPs, there is insufficient consideration given to how to instruct the UE (and how the UE should interpret the instructions) regarding the TPMI fields for repeated PUSCH transmissions using a single PUSCH transmission / single TRP and the TPMI fields for repeated PUSCH transmissions using multiple TRPs. If these considerations are insufficient, repeated PUSCH transmissions using multiple TRPs may not be performed properly, potentially leading to decreased throughput, degraded communication quality, and increased DCI signaling overhead.

[0081] Therefore, the inventors devised a control method for repeated PUSCH transmission that solves the above problem. More specifically, they devised a control method that takes into account that the maximum rank differs between transmission using a single TRP and transmission using multiple TRPs.

[0082] The embodiments of this disclosure will be described in detail below with reference to the drawings. Each wireless communication method according to the embodiments may be applied individually or in combination.

[0083] In this disclosure, the terms port, panel, beam, Uplink (UL) transmit entity, TRP, spatial relation information (SRI), spatial relation, control resource set (CORESET), PDSCH, codeword, base station, predetermined antenna port (e.g., demodulation reference signal (DMRS) port), predetermined antenna port group (e.g., DMRS port group), predetermined group (e.g., code division multiplexing (CDM) group, predetermined reference signal group, CORESET group, panel group, beam group, spatial relation group, PUCCH group), and CORESET pool may be interpreted as interchangeable. Also, panel identifier (ID) and panel may be interpreted as interchangeable. TRP ID and TRP may be interpreted as interchangeable.

[0084] In this disclosure, the terms index, ID, indicator, and resource ID may be interpreted as interchangeable.

[0085] In this disclosure, “A / B” may mean “at least one of A and B.” Also, in this disclosure, “A / B / C” may mean “at least one of A, B, and C.”

[0086] In this disclosure, lists, groups, clusters, subsets, etc., may be interpreted interchangeably. In this disclosure, spatial relation information (SRI), SRS resource indicators (SRI, or SRI fields), SRS resources, precoders, etc., may be interpreted interchangeably.

[0087] In this disclosure, spatial relation information (SRI), combinations of SRI, SRI for codebook-based transmission, combinations of non-codebook-based SRI, spatialRelationInfo, UL TCI, TCI status, Unified TCI, QCL, etc., may be interpreted interchangeably.

[0088] In this disclosure, the first TRP and the second TRP may be interpreted as the first PUSCH and the second PUSCH, the first PUSCH transmission opportunity and the second PUSCH transmission opportunity, the first SRI and the second SRI, and so on.

[0089] In this disclosure, transmission rank, maximum transmission rank, maximum transmission rank, number of TPMI candidates, number of TPMIs, maximum number of TPMIs, UL transmission rank, maximum transmission rank of UL, etc., may be interpreted interchangeably.

[0090] In the following embodiments, repeated transmission of PUSCH using multiple TRPs may be interpreted as PUSCH transmission using multiple TRPs, repeated transmission of PUSCH for multiple TRPs, PUSCH across multiple TRPs, repeated PUSCH across multiple TRPs, simply repeated PUSCH, repeated transmission, multiple PUSCH transmissions, PUSCH transmission using multiple SRIs, and so on.

[0091] Furthermore, a push transmission using a single TRP may also be called a push transmission using a single TRP, repeated push transmissions for a single TRP, a push across a single TRP, repeated pushes across a single TRP, a single push transmission for a single TRP, simply a single push transmission, a push transmission on a single TRP, a push transmission using a single SRI, and so on.

[0092] In this disclosure, the correspondence between the code point of the TPMI field and the TPMI value for a PUSCH using a single TRP may be referred to as the first correspondence with respect to TPMI, the first correspondence, etc. Also, the correspondence between the code point of the TPMI field and the TPMI value for a PUSCH using multiple TRPs may be referred to as the second correspondence with respect to TPMI, the second correspondence, etc.

[0093] In this disclosure, repeated transmission of a PUSCH for a single TRP may mean repeated transmission of multiple PUSCHs transmitted using the same SRI / beam / precoder.

[0094] In each embodiment of this disclosure, UL transmissions are described using examples such as PUSCH transmissions for one or more TRPs using one DCI and codebook-based PUSCH transmissions. However, these embodiments may also be applied to non-codebook-based PUSCH transmissions, and the PUSCH transmissions to which each embodiment can be applied are not limited to these. When each embodiment of this disclosure is applied to a non-codebook-based PUSCH transmission, one or more SRS resources (SRIs) may be indicated to the UE by each SRI field. Furthermore, common or different embodiments may be applied to codebook-based PUSCH transmissions and non-codebook-based PUSCH transmissions. In addition, UL transmissions are not limited to PUSCH, and each embodiment of this disclosure can be appropriately applied to PUCCH (PUSCH may be read as PUCCH).

[0095] Furthermore, while the embodiments described in this disclosure primarily describe cases where there are two TRPs, SRIs, etc., these numbers may be three or more. Also, the term "dynamic switch" in this disclosure may mean "a switch that uses at least one of upper-layer signaling and physical-layer signaling." In addition, the term "switch" in this disclosure may be interpreted as switching, change, changing, applying, instructing, setting, etc.

[0096] In this disclosure, repeated PUSCH transmissions using a single PUSCH transmission / single TRP and repeated PUSCH transmissions using multiple TRPs may be dynamically instructed / switched by DCI. Such dynamic switching may utilize specific fields included in DCI as defined up to Rel.16, or specific fields as defined in Rel.17 and later.

[0097] (Wireless communication method) <First Embodiment> In codebook-based PUSCH transmissions, the UE may use higher-layer signaling to set / notify the maximum transmission rank (layer) of the UL. The setting / notification of the maximum transmission rank of the UL may utilize a specific higher-layer parameter (e.g., maxRank included in PUSCH-Config).

[0098] Setting / notifying the maximum transmission rank of UL to UE may follow at least one of the following embodiments 1-1 and 1-2.

[0099] Embodiment 1-1 A UE may be set to the maximum transmit rank for a single UL. The UE may receive information indicating the maximum transmit rank for a UL that sets a single value, using upper-layer signaling.

[0100] The information indicating the maximum transmission rank of the UL may be obtained using the higher-layer parameters of Rel.15 / 16 (for example, maxRank included in PUSCH-Config) or specific higher-layer parameters defined in Rel.17 or later.

[0101] The UE may apply the set maximum transmission rank of the UL to both single PUSCH transmissions / repeated PUSCH transmissions using a single TRP and repeated PUSCH transmissions using multiple TRPs.

[0102] In Embodiment 1-1, when repeated transmission of PUSCH using multiple TRPs is set for the UE, the value of the UL transmission rank may be limited. For example, the value of the UL transmission rank may be determined from a first candidate number (e.g., 1 or 2), or from a number greater than the first candidate number (e.g., 1, 2, or 3).

[0103] In Embodiment 1-1, the UE may be notified using upper-layer signaling that the maximum transmission rank for UL transmissions using multiple TRPs is indicated, and information indicating a transmission rank less than or equal to that maximum value may be notified using DCI.

[0104] Embodiment 1-2 The UE may have separate (independent) settings for the maximum transmission rank of a UL transmission using a single TRP and the maximum transmission rank of a UL transmission using multiple TRPs. The UE may receive information indicating the maximum transmission rank of a UL transmission using a single TRP and information indicating the maximum transmission rank of a UL transmission using multiple TRPs using upper-layer signaling.

[0105] The information indicating the maximum transmission rank for a UL transmission using a single TRP may be a higher-layer parameter from Rel. 15 / 16 (for example, maxRank included in PUSCH-Config), or a specific higher-layer parameter defined in Rel. 17 or later. Similarly, the information indicating the maximum transmission rank for a UL transmission using multiple TRPs may be a specific higher-layer parameter defined in Rel. 17 or later.

[0106] The UE may determine the transmission rank of a UL transmission using multiple TRPs based on the maximum transmission rank of the UL transmission using multiple TRPs. The UE may also determine the transmission rank value of a UL for repeated PUSCH transmissions using multiple TRPs from a first candidate number (e.g., 1 or 2). For example, the UE may be notified using upper-layer signaling that there is information indicating the maximum transmission rank of a UL transmission using multiple TRPs, and information indicating a transmission rank less than or equal to that maximum may be notified using DCI.

[0107] Furthermore, the UE may determine the UL transmission rank value for repeated PUSCH transmissions using multiple TRPs from a second number of candidates (e.g., 1, 2, 3, or 4). In this case, the second number of candidates may be limited (or a portion of the second number of candidates) set in the UE. Limiting the transmission rank for repeated PUSCH transmissions using multiple TRPs can reduce the DCI signaling overhead. Whether or not to limit the transmission rank for repeated PUSCH transmissions using multiple TRPs may depend on the settings for the UE.

[0108] The UE may determine the transmission rank of a UL transmission using a single TRP based on the maximum transmission rank of a UL transmission using a single TRP. The UE may determine the transmission rank value of a UL for a single PUSCH transmission / repeated PUSCH transmission using a single TRP from a second candidate number (e.g., 1, 2, 3, or 4).

[0109] Figure 5 shows an example of setting the maximum value of the transmission rank according to the first embodiment. The example shown in Figure 5 shows information elements (e.g., RRC information elements) for setting / notifying the UE of the transmission rank of a UL transmission. Figure 5 shows the contents of the above embodiment 1-2. In Figure 5, the information related to the setting of PUSCH (here, PUSCH-Config) includes information indicating the maximum value of the transmission rank for a UL transmission using a single TRP (here, maxRank-for-S-TRP) and information indicating the maximum value of the transmission rank for a UL transmission using multiple TRPs (maxRank-for-M-TRP). The UE determines the transmission rank of a UL transmission using a single TRP based on maxRank-for-S-TRP and determines the transmission rank of a UL transmission using multiple TRPs based on maxRank-for-M-TRP.

[0110] Furthermore, the UE does not need to anticipate or expect to receive a DCI indicating a transmit rank value exceeding the maximum transmit rank value set by the upper layer signaling. Also, if the UE receives a DCI indicating a value exceeding the maximum transmit rank value set by the upper layer signaling, it may ignore the instruction.

[0111] According to the first embodiment described above, it becomes possible to apply a restricted transmission rank to both UL transmissions using a single TRP and UL transmissions using multiple TRPs.

[0112] <Second Embodiment> The UE may assume that, in a codebook-based PUSCH transmission, the correspondence between the code point in the TPMI field and the TPMI value for a PUSCH using a single TRP (first correspondence) is different from the correspondence between the code point in the TPMI field and the TPMI value for a PUSCH using multiple TRPs (second correspondence). In other words, the UE may determine the TPMI to apply to a PUSCH using a single TRP based on the first correspondence and the TPMI to apply to a PUSCH using multiple TRPs based on the second correspondence.

[0113] Embodiment 2-1 When a UE is instructed to repeatedly transmit a PUSCH using multiple TRPs, the UE may instruct multiple TPMIs using a single DCI in accordance with at least one of options 1 and 2 above. The UE may apply the first correspondence and the transmission rank of the UL transmission set for the repeated PUSCH using multiple TRPs to the PUSCH transmission using multiple TRPs.

[0114] In this embodiment, the determination / application of the transmission rank for UL transmission may be carried out according to the method described in the first embodiment above.

[0115] Embodiment 2-2 When a UE is instructed to repeatedly transmit a PUSCH using a single TRP, the UE may instruct one or more TPMIs using a single DCI in accordance with at least one of options 1 and 2 above. The UE may apply the first correspondence and the transmission rank of the UL transmission set for the PUSCH transmit using a single TRP to the PUSCH transmit using a single TRP.

[0116] [Embodiment 2-2-1] In Embodiment 2-2-1, as described in Option 1 above, the UE may be notified of fields (hereinafter referred to as instruction fields) that indicate multiple (e.g., two) TPMIs.

[0117] For example, the UE may assume that a combination of code points in a field that indicates multiple TPMIs (indicator field) determines the code points for indicating multiple (e.g., two) TPMIs. For example, the UE may determine that a specific number (e.g., 2) of the most significant bits (MSBs) of the code points in the indicator field are the first TPMI field for the first TRP. The UE may also determine that a specific number (e.g., 2) of the least significant bits (LSBs) of the code points in the indicator field are the second TPMI field for the second TRP. In this case, the UE may use the correspondence between the combined code points and TPMI values ​​to determine which TPMI to apply.

[0118] In this disclosure, MSB and LSB may be interpreted as mutually exclusive. Furthermore, while this disclosure provides examples of combinations of code points indicating two TPMIs, the instruction field may consist of combinations of code points indicating three or more TPMIs. If the instruction field consists of combinations of code points indicating three or more TPMIs, the UE may divide the code points of the instruction field into groups of a specific number (e.g., 2) and determine that the Nth (where N is an integer) code point is the Nth TPMI for the Nth TRP.

[0119] Each of the multiple code points that indicate multiple TPMIs and constitute the above instruction field may correspond to a single TPMI(value).

[0120] The correspondence (association) between TPMI fields and TPMI values ​​may be defined in advance in the specification, or the correspondence specified up to Rel.16 may be used, or the correspondence specified in Rel.17 or later may be used.

[0121] [Embodiment 2-2-2] In Embodiment 2-2-2, as described in Option 2 above, the UE may be notified of a field (hereinafter referred to as the instruction field) that indicates one TPMI.

[0122] A code point in a field indicating a single TPMI may correspond to a single TPMI(value).

[0123] The correspondence (association) between TPMI fields and TPMI values ​​may be defined in advance in the specification, or the correspondence specified up to Rel.16 may be used, or the correspondence specified in Rel.17 or later may be used.

[0124] Figures 6A-6C show an example of TPMI instruction according to the second embodiment. As shown in Figure 6A, two TPMI fields (TPMI field #1 and TPMI field #2) are instructed to the UE from the network (NW, e.g., base station).

[0125] When the UE receives an instruction as shown in Figure 6A, and is instructed to repeatedly transmit a PUSCH using multiple TRPs, it determines the transmission rank and TPMI value using the correspondence between the TPMI code point and TPMI value corresponding to each TRP, as shown in Figure 6B. In the example shown in Figures 6A and 6B, the UE is instructed to set TPMI field (code point) #1 to "00" and TPMI field (code point) #2 to "01". Based on the correspondence between the TPMI code point and TPMI value for TRP #1, the UE determines that the transmission rank and TPMI to be applied to the UL transmission using TRP #1 is "2 layer, TPMI=0". Also, based on the correspondence between the TPMI code point and TPMI value for TRP #2, the UE determines that the transmission rank and TPMI to be applied to the UL transmission using TRP #2 is "2 layer, TPMI=1".

[0126] In the example shown in Figure 6B, the correspondence between TPMI code points and TPMI values ​​corresponding to different TRPs is described separately, but a common correspondence for each TRP may also be used.

[0127] Furthermore, when the UE receives an instruction as shown in Figure 6A and is instructed to repeatedly transmit a PUSCH signal using a single TRP, it determines the transmission rank and TPMI value using the correspondence between the TPMI code point and the TPMI value corresponding to the single TRP, as shown in Figure 6C. In the example shown in Figures 6A and 6C, the UE is instructed to set TPMI field (code point) #1 as "00" and TPMI field (code point) #2 as "01". The UE determines that the MSB2 bits of the TPMI code point (4 bits in this case) in the correspondence between the TPMI code point and the TPMI value is the first TPMI field. The UE also determines that the LSB2 bits of the TPMI code point in the correspondence between the TPMI code point and the TPMI value is the second TPMI field. In other words, the UE determines that the TPMI code point in the correspondence between the TPMI code point and the TPMI value is "0001", and from this correspondence, it determines that the transmission rank and TPMI to be applied to UL transmission are "4 layer, TPMI=1".

[0128] The correspondence between TPMI code points and TPMI values ​​in each drawing in this disclosure is merely an example, and the number of code points, the number of bits in each code point, the values ​​of each parameter, etc., are not limited to this example.

[0129] Figures 7A-7C show other examples of TPMI instructions according to the second embodiment. As shown in Figure 7A, one TPMI field is instructed to the UE from the network (NW, e.g., base station).

[0130] When the UE receives an instruction as shown in Figure 7A, and is instructed to repeatedly transmit a PUSCH using multiple TRPs, it determines the transmission rank and TPMI value using the correspondence between the TPMI code point and TPMI value corresponding to each TRP, as shown in Figure 7B. In the example shown in Figures 7A and 7B, the UE is instructed to use "0000" as the TPMI field (code point). From this correspondence, the UE determines that the transmission rank and TPMI (TPMI value #1) to be applied to the UL transmission using TRP #1 is "2 layer, TPMI=0". The UE also determines from this correspondence that the transmission rank and TPMI (TPMI value #2) to be applied to the UL transmission using TRP #2 is "2 layer, TPMI=1".

[0131] Furthermore, when the UE receives an instruction as shown in Figure 7A and is instructed to repeatedly transmit a PUSCH using a single TRP, it determines the transmission rank and TPMI value using the correspondence between the TPMI code point and TPMI value corresponding to the single TRP, as shown in Figure 7C. In the example shown in Figures 7A and 7C, the UE is instructed to use "0000" as the TPMI field (code point). From this correspondence, the UE determines that the transmission rank and TPMI to be applied to the UL transmission are "4 layer, TPMI=0".

[0132] According to the second embodiment described above, it becomes possible to appropriately specify the transmission rank and TPMI whether performing UL transmission using a single TRP or UL transmission using multiple TRPs.

[0133] <Third Embodiment> In the third embodiment, modifications of the first and second embodiments described above will be explained.

[0134] The UE may assume that certain higher-layer parameters for determining the correspondence between TPMI code points and TPMI(values) are set differently for push transmissions using a single TRP and push transmissions using multiple TRPs.

[0135] For example, the specific parameter may be at least one of the following: a parameter for specifying the UL's full-power transmission mode (e.g., ul-FullPowerTransmission, ul-FullPowerTransmission-r16), a parameter indicating the maximum transmission rank of the UL (e.g., maxRank), a parameter indicating a subset of a certain precoding matrix indicator (PMI) (e.g., codebookSubset), or a parameter for specifying a transform precoder (e.g., transformPrecoder).

[0136] If a push transmission using multiple TRPs is configured, the UE may use / apply the correspondence between TPMI code points and TPMI values ​​corresponding to the specific parameters set for the push transmission using multiple TRPs.

[0137] Furthermore, if a push transmission using a single TRP is configured, the UE may utilize / apply the correspondence between TPMI code points and TPMI values ​​corresponding to the specific parameters configured for the push transmission using a single TRP.

[0138] Furthermore, if a push transmission using a single TRP is configured, the UE may utilize / apply the correspondence between TPMI code points and TPMI values ​​that corresponds to the specific parameters configured for push transmissions using multiple TRPs.

[0139] Furthermore, each embodiment of the present disclosure may be applied to any repeating type of PUSCH. For example, each embodiment of the present disclosure may be applied to at least one of repeating type A and repeating type B of PUSCH.

[0140] The UE may assume that certain higher-level parameters corresponding to iteration type A of PUSCH (e.g., at least one of maxRank, ul-FullPowerTransmission-r16, codebookSubset, transformPrecoder) are the same as the same higher-level parameters corresponding to iteration type B of PUSCH.

[0141] Furthermore, the UE may assume that certain higher-level parameters corresponding to PUSCH iteration type A (e.g., at least one of maxRank, ul-FullPowerTransmission-r16, codebookSubset, transformPrecoder) and the same certain higher-level parameters corresponding to PUSCH iteration type B are different (set separately).

[0142] According to the third embodiment described above, it becomes possible to flexibly configure settings for UL transmission using a single TRP and UL transmission using multiple TRPs.

[0143] <Fourth Embodiment> In a fourth embodiment, UE capability will be described. The UE may report (transmit) to the NW whether it has such capability.

[0144] The UE capability for dynamic switching between repeated PUSCH transmissions using a single TRP / single PUSCH transmission and repeated PUSCH transmissions using multiple TRPs may be defined as whether or not repeated PUSCH transmissions for multiple TRPs are supported.

[0145] The UE capability for dynamic switching between repeated push transmissions using a single TRP / single push transmission and repeated push transmissions using multiple TRPs may be defined as whether or not dynamic switching between single push transmissions and repeated push transmissions using multiple TRPs is supported.

[0146] Furthermore, the UE capability for dynamic switching between repeated PUSCH transmissions using a single TRP / single PUSCH transmissions and repeated PUSCH transmissions using multiple TRPs may be defined as whether or not dynamic switching between repeated PUSCH transmissions using a single TRP and repeated PUSCH transmissions using multiple TRPs is supported.

[0147] Furthermore, the maximum transmission rank for repeated transmissions of a pusher using multiple TRPs may be defined as the UE capability.

[0148] Furthermore, the maximum transmit rank for repeated PUSCH transmissions using a single PUSCH transmit / single TRP may be defined as the UE capability.

[0149] Furthermore, whether or not it supports different specific higher-layer parameters (e.g., maxRank, ul-FullPowerTransmission-r16, codebookSubset, transformPrecoder) for single push transmissions / repeated push transmissions using a single TRP and repeated push transmissions using multiple TRPs may also be defined as UE capability.

[0150] Furthermore, whether or not the UE capability supports different correspondences between TPMI code points and TPMI values ​​for repeated push transmissions using a single push / single TRP and repeated push transmissions using multiple TRPs may also be defined as UE capability.

[0151] Each embodiment of the present disclosure may apply under at least one of the following conditions: the UE reports to the NW a UE capability corresponding to at least one of the above; and the UE is configured / activated / instructed by upper-layer signaling for at least one of the above UE capabilities. Each embodiment of the present disclosure may also apply to the UE when a specific upper-layer parameter is configured / activated / instructed.

[0152] (Wireless communication system) The configuration of a wireless communication system according to one embodiment of this disclosure will be described below. In this wireless communication system, communication is performed using any or a combination thereof of the wireless communication methods according to the above embodiments of this disclosure.

[0153] Figure 8 shows 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., as specified by the Third Generation Partnership Project (3GPP).

[0154] Furthermore, the wireless communication system 1 may support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include 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)), and so on.

[0155] In EN-DC, the LTE (E-UTRA) base station (eNB) is the Master Node (MN), and the NR base station (gNB) is the Secondary Node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0156] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity where both MN and SN are NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0157] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) located within the macrocell C1 that form a small cell C2 that is narrower than the macrocell C1. User terminals 20 may be located within at least one cell. The arrangement and number of each cell and user terminal 20 are not limited to the configuration shown in the figure. Hereinafter, when base stations 11 and 12 are not distinguished, they will be collectively referred to as base station 10.

[0158] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of Carrier Aggregation (CA) using multiple Component Carriers (CC) and Dual Connectivity (DC).

[0159] 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)). A macrocell C1 may be included in FR1, and a small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and 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 fall in a frequency band higher than FR2.

[0160] Furthermore, the user terminal 20 may communicate using at least one of the following methods at each CC: Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0161] Multiple base stations (e.g., RRHs) 10 may be connected by wire (e.g., optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wireless (e.g., NR communication). For example, if NR communication is used as backhaul between base stations 11 and 12, base station 11, which is the upstream station, may be called an Integrated Access Backhaul (IAB) donor, and base station 12, which is the relay station, may be called an IAB node.

[0162] Base station 10 may be connected to the core network 30 via other base stations 10 or directly. The core network 30 may include at least one of the following: Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0163] The user terminal 20 may be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0164] In the wireless communication system 1, an orthogonal frequency division multiplexing (OFDM)-based wireless access scheme may be used. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc., may be used in at least one of the downlink (DL) and uplink (UL).

[0165] The wireless access method may also be called a waveform. In wireless communication system 1, other wireless access methods (for example, other single-carrier transmission methods, other multi-carrier transmission methods) may be used for the UL and DL wireless access methods.

[0166] In the wireless communication system 1, a Physical Downlink Shared Channel (PDSCH), a Broadcast Channel (PBCH), or a Physical Downlink Control Channel (PDCCH) may be used as the downlink channel, shared by each user terminal 20.

[0167] Furthermore, in the wireless communication system 1, the uplink channel may include a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Physical Random Access Channel (PRACH), or the like, all of which are shared by each user terminal 20.

[0168] User data, higher-layer control information, and System Information Blocks (SIBs) are transmitted via PDSCH. User data and higher-layer control information may also be transmitted via PUSCH. Furthermore, Master Information Blocks (MIBs) may be transmitted via PBCH.

[0169] Lower-layer control information may be transmitted by PDCCH. The lower-layer control information may include, for example, Downlink Control Information (DCI) which includes scheduling information for at least one of PDSCH and PUSCH.

[0170] Furthermore, the DCI that schedules PDSCH may be called a DL assignment or DL ​​DCI, and the DCI that schedules PUSCH may be called a UL grant or UL DCI. Furthermore, PDSCH may be interpreted as DL data, and PUSCH may be interpreted as UL data.

[0171] PDCCH detection may utilize a Control Resource Set (CORESET) and a search space. A CORESET corresponds to the resources used to search for DCIs. A search space corresponds to the search area and search method for PDCCH candidates. A single CORESET may be associated with one or more search spaces. The UE may monitor CORESETs associated with a particular search space based on the search space configuration.

[0172] A single search space may correspond to one or more PDCCH candidates corresponding to aggregation levels. One or more search spaces may be referred to as a search space set. In this disclosure, "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," and "CORESET configuration" may be interpreted interchangeably.

[0173] PUCCH may transmit uplink control information (UCI) which includes at least one of the following: channel state information (CSI), delivery acknowledgment (e.g., Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). PRACH may transmit a random access preamble for establishing a connection with the cell.

[0174] In this disclosure, downlinks, uplinks, etc., may be expressed without the prefix "link." Also, the prefix "physical" may be omitted from the names of various channels.

[0175] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc., may be transmitted. In the wireless communication system 1, as DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc., may be transmitted.

[0176] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS / PBCH block, SS Block (SSB), etc. SS, SSB, etc., may also be called reference signals.

[0177] Furthermore, in the wireless communication system 1, the Uplink Reference Signal (UL-RS) may transmit the Sounding Reference Signal (SRS), Demodulation Reference Signal (DMRS), etc. The DMRS may also be called the User-Specific Reference Signal (UE-specific Reference Signal).

[0178] (base station) Figure 9 shows an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of the control unit 110, transceiver unit 120, transceiver antenna 130, and transmission line interface 140 may be provided.

[0179] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

[0180] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, control circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0181] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc., using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transceiver unit 120. The control unit 110 may also perform call processing of communication channels (setting, releasing, etc.), status management of the base station 10, management of radio resources, etc.

[0182] The transmitting / receiving unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transmitting / receiving unit 120 can be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0183] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or it may be composed of a transmitting unit and a receiving unit. The transmitting unit may consist of a transmitting processing unit 1211 and an RF unit 122. The receiving unit may consist of a receiving processing unit 1212, an RF unit 122 and a measuring unit 123.

[0184] The transmitting and receiving antenna 130 can be composed of an antenna described based on common understanding in the art relating to this disclosure, such as an array antenna.

[0185] The transmitting / receiving unit 120 may transmit the downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 may also receive the uplink channel, uplink reference signal, etc.

[0186] The transmitting / receiving unit 120 may form at least one of the transmitting beam and the receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0187] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform processing on data and control information acquired from the control unit 110, for example, at the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (e.g., RLC retransmission control), the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), etc., to generate a bit sequence to be transmitted.

[0188] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform transmission processing on the bit sequence to be transmitted, such as channel coding (which may include error correction coding), modulation, mapping, filtering, discrete Fourier transform (DFT) processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, and digital-to-analog conversion, and output a baseband signal.

[0189] The transmitting / receiving unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc., of the baseband signal to the radio frequency band and transmit the signal in the radio frequency band via the transmitting / receiving antenna 130.

[0190] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc., on the radio frequency band signal received by the transmitting / receiving antenna 130.

[0191] The transmitting / receiving unit 120 (receiving processing unit 1212) may apply reception processing to the acquired baseband signal, such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to acquire user data, etc.

[0192] The transmitting / receiving unit 120 (measurement unit 123) may perform measurements related to the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may also measure received power (e.g., Reference Signal Received Power (RSRP)), reception quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0193] The transmission path interface 140 may send and receive signals (backhaul signaling) with devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0194] In this disclosure, the transmitting and receiving units of the base station 10 may consist of at least one of a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

[0195] The transmitting / receiving unit 120 may transmit one Downlink Control Information (DCI) for one or more Physical Uplink Shared Channels (PUSCH). The control unit 110 may control the reception of multiple PUSCHs using multiple SRS Resource Indicators (SRIs), or the reception of one or more PUSCHs using a single SRI, where the TPMI and transmission rank are applied based on one or more pieces of information indicating the Transmitted Precoding Matrix Indicator (TPMI) and transmission rank for the PUSCH, which are included in the DCI (first and second embodiments).

[0196] (User terminal) Figure 10 shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Note that one or more of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0197] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

[0198] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., as described based on common understanding in the technical field related to this disclosure.

[0199] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc., using the transmitting / receiving unit 220 and the transmitting / receiving antenna 230. The control unit 210 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transmitting / receiving unit 220.

[0200] The transmitting / receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitting / receiving unit 220 can be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0201] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or it may be composed of a transmitting unit and a receiving unit. The transmitting unit may consist of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may consist of a receiving processing unit 2212, an RF unit 222 and a measuring unit 223.

[0202] The transmitting and receiving antenna 230 can be composed of an antenna described based on common understanding in the art relating to this disclosure, such as an array antenna.

[0203] The transmitting / receiving unit 220 may receive the downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 220 may also transmit the uplink channel, uplink reference signal, etc.

[0204] The transmitting / receiving unit 220 may form at least one of the transmitting beam and the receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0205] The transmitting / receiving unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc., on data and control information acquired from the control unit 210, etc., to generate a bit sequence to be transmitted.

[0206] The transmitting / receiving unit 220 (transmission processing unit 2211) may perform transmission processing on the bit sequence to be transmitted, such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion, and output a baseband signal.

[0207] Whether or not to apply DFT processing may be based on the transform precoding settings. The transmitting / receiving unit 220 (transmission processing unit 2211) may perform DFT processing as part of the transmission process to transmit a channel (for example, PUSCH) using a DFT-s-OFDM waveform if transform precoding is enabled for that channel, or it may not perform DFT processing as part of the transmission process if transform precoding is not enabled for that channel.

[0208] The transmitting / receiving unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc., of the baseband signal to the radio frequency band and transmit the signal in the radio frequency band via the transmitting / receiving antenna 230.

[0209] On the other hand, the transmitting / receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc., on the radio frequency band signal received by the transmitting / receiving antenna 230.

[0210] The transmitting / receiving unit 220 (receiving processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

[0211] The transmitting / receiving unit 220 (measuring unit 223) may perform measurements related to the received signal. For example, the measuring unit 223 may perform RRM measurement, CSI measurement, etc., based on the received signal. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0212] In this disclosure, the transmitting and receiving units of the user terminal 20 may consist of at least one of a transmitting / receiving unit 220 and a transmitting / receiving antenna 230.

[0213] The transmitting / receiving unit 220 may receive one Downlink Control Information (DCI) for one or more Physical Uplink Shared Channels (PUSCHs). The control unit 210 may control the application of TPMI and transmit rank to the transmission of multiple PUSCHs using multiple SRS Resource Indicators (SRIs), or to the transmission of one or more PUSCHs using a single SRI, based on one or more pieces of information included in the DCI that indicate a Transmitted Precoding Matrix Indicator (TPMI) and a transmit rank for the PUSCH (first and second embodiments).

[0214] The control unit 210 may determine the application of the TPMI and the transmission rank using a specific correspondence established using upper-layer signaling (first and second embodiments).

[0215] When a UE (terminal) sets up multiple PUSCH transmissions using the multiple SRIs, the control unit 210 may determine the TPMI and transmission rank corresponding to each of the multiple PUSCHs (second embodiment).

[0216] When a UE (terminal) sets up one or more push transmissions using the single SRI, the control unit 210 may determine the TPMI and the transmission rank to be applied to the push transmission using the single SRI (second embodiment).

[0217] (Hardware configuration) The block diagrams used in the description of the above embodiments show functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may also be realized by combining the above one device or the above multiple devices with software.

[0218] Here, functions include, but are not limited to, judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission may be called a transmitting unit or transmitter. In all cases, as mentioned above, the method of implementation is not particularly limited.

[0219] For example, a base station, user terminal, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 11 is a diagram showing an example of the hardware configuration of a base station and 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, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0220] In this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or it may be configured without some of the devices.

[0221] For example, although only one processor 1001 is shown in the diagram, there may be multiple processors. Furthermore, processing may be performed by one processor, or by two or more processors simultaneously, sequentially, or by other means. Note that processor 1001 may be implemented using one or more chips.

[0222] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as the processor 1001 and memory 1002, which allows the processor 1001 to perform calculations and control communication via the communication device 1004, or to control at least one of the reading and writing of data in the memory 1002 and storage 1003.

[0223] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may be composed of a central processing unit (CPU) that includes interfaces with peripheral devices, control units, arithmetic units, registers, etc. For example, at least a part of the control unit 110 (210) and the transmitting / receiving unit 120 (220) described above may be implemented by the processor 1001.

[0224] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes accordingly. The program used is one that causes the computer to execute at least a part of the operations described in the above embodiment. For example, 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 implemented similarly.

[0225] Memory 1002 is a computer-readable recording medium and may consist of at least one of the following: Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. Memory 1002 may also be called a register, cache, or main memory. Memory 1002 can store executable programs (program code), software modules, etc., for carrying out a wireless communication method according to one embodiment of this disclosure.

[0226] Storage 1003 is a computer-readable recording medium and may consist of at least one of the following: a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (Compact Disc ROM (CD-ROM)), a digital multipurpose disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be called an auxiliary storage device.

[0227] 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 referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may be configured to include, for example, a high-frequency switch, duplexer, filter, frequency synthesizer, etc., in order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmitting / receiving unit 120 (220), transmitting / receiving antenna 130 (230), etc., may be implemented by the communication device 1004. The transmitting / receiving unit 120 (220) may be implemented with physically or logically separated implementations of a transmitting unit 120a (220a) and a receiving unit 120b (220b).

[0228] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, light-emitting diode (LED) lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0229] Furthermore, each device, such as the processor 1001 and memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0230] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and some or all of each functional block may be implemented using such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0231] (modified version) In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be used interchangeably. Also, a signal may be a message. A reference signal may be abbreviated as RS and may be called a pilot, pilot signal, etc., depending on the applicable standard. Also, a component carrier (CC) may be called a cell, frequency carrier, carrier frequency, etc.

[0232] A wireless frame may consist of one or more periods (frames) in the time domain. Each of these periods (frames) constituting a wireless frame may be called a subframe. Furthermore, a subframe may consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0233] Here, the neuralelogy may be communication parameters applied to at least one of the transmission and reception of a signal or channel. The neuralelogy may be, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processes performed by the transceiver in the frequency domain, or specific windowing processes performed by the transceiver in the time domain.

[0234] A slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols or Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols). Alternatively, a slot may be a time unit based on neurology.

[0235] A slot may include multiple mini-slots. Each mini-slot may consist of one or more symbols in the time domain. Mini-slots may also be called sub-slots. Mini-slots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may be called a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be called a PDSCH (PUSCH) mapping type B.

[0236] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Wireless frames, subframes, slots, minislots, and symbols may each be referred to by different names. Furthermore, the units of time such as frames, subframes, slots, minislots, and symbols in this disclosure may be interpreted as interchangeable.

[0237] For example, one subframe may be called TTI, multiple consecutive subframes may be called TTI, or one slot or one mini-slot may be called TTI. In other words, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. Note that the unit representing TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0238] Here, TTI refers to, for example, the smallest unit of time for scheduling in wireless communication. For example, in an LTE system, the base station schedules each user terminal to allocate wireless resources (such as the frequency bandwidth and transmission power available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0239] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. Given a TTI, the actual time interval (e.g., number of symbols) to which the transport block, code block, code word, etc. are mapped may be shorter than the given TTI.

[0240] Furthermore, if one slot or one mini-slot is referred to as TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit of scheduling. In addition, the number of slots (number of mini-slots) that constitute the minimum time unit of scheduling may be controlled.

[0241] A TTI with a time length of 1 ms may also be called a normal TTI (TTI in 3GPP Rel.8-12), a long TTI, a normal subframe, a long subframe, or a slot. A TTI shorter than a normal TTI may also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini slot, a sub slot, or a slot.

[0242] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0243] A Resource Block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0244] Furthermore, an RB may contain one or more symbols in the time domain and may have the length of one slot, one minislot, one subframe, or one TTI. Each TTI, subframe, etc., may consist of one or more resource blocks.

[0245] One or more RBs may also be called Physical RBs (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0246] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0247] A Bandwidth Part (BWP) (also called a partial bandwidth) may represent a subset of consecutive common resource blocks (RBs) for a given neurology in a given carrier. Here, the common RBs may be identified by an index of the RBs relative to the carrier's common reference point. PRBs may be defined and numbered within a BWP.

[0248] A BWP may include UL BWPs (BWPs for UL) and DL BWPs (BWPs for DL). One or more BWPs may be configured within a single carrier for a UE.

[0249] At least one of the configured BWPs may be active, and the UE does not need to assume that it will send or receive a given signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0250] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative examples. For instance, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots within a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within a TTI can be varied in various ways.

[0251] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or corresponding other information. For example, wireless resources may be indicated by a predetermined index.

[0252] The names used for parameters and other elements in this disclosure are not restrictive in any way. Furthermore, mathematical formulas and other elements that use these parameters may differ from those expressly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0253] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0254] Furthermore, information, signals, etc., can be output from upper layers to lower layers and from lower layers to upper layers, or to at least one of the two. Information, signals, etc., may also be input and output via multiple network nodes.

[0255] Input and output information and signals may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information and signals may be overwritten, updated, or appended to. Output information and signals may be deleted. Input information and signals may be transmitted to other devices.

[0256] Information notification is not limited to the embodiments described herein and may be carried out by other means. For example, information notification in this disclosure may be carried out by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof).

[0257] Physical layer signaling may also be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. RRC signaling may also be called RRC messages, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc. MAC signaling may also be communicated using, for example, MAC Control Element (CE).

[0258] Furthermore, notification of the specified information (for example, notification that "X is the case") is not limited to explicit notification, but may also be made implicitly (for example, by not notifying the specified information or by notifying other information).

[0259] The determination may be made by a value represented by 1 bit (0 or 1), by a boolean value represented as true or false, or by a numerical comparison (for example, a comparison with a predetermined value).

[0260] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0261] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or Digital Subscriber Line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0262] The terms “system” and “network” as used in this disclosure may be used interchangeably. “Network” may also mean the equipment included in the network (e.g., base stations).

[0263] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "quasi-co-location (QCL)," "transmission configuration indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," and "panel" may be used interchangeably.

[0264] In this disclosure, terms such as "Base Station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0265] A base station can house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station can be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0266] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0267] A mobile station may also be called a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate term.

[0268] At least one of the base station and the mobile station may be referred to as a transmission device, a reception device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), a mobile body that moves unmanned (e.g., a drone, a self-driving vehicle, etc.), or a robot (humanoid or unmanned). Note that at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0269]

[0270]

[0271] <00009In this disclosure, operations performed by a base station may, in some cases, be performed by its upper node. In a network including one or more network nodes with base stations, it is clear that various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (for example, a Mobility Management Entity (MME), a Serving Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0272] Each aspect / embodiment described in this disclosure may be used individually, in combination, or switched between during execution. Furthermore, the processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described in this disclosure may be rearranged in order, provided they are consistent. For example, the methods described in this disclosure present various step elements in an exemplary order and are not limited to that specific order.

[0273] Each aspect / embodiment described in the present disclosure may be applied to systems using Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (x is, for example, an integer or a decimal), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other suitable wireless communication methods, and next-generation systems extended based on these. Further, multiple systems may be combined (for example, a combination of LTE or LTE-A and 5G) and applied.

[0274] The description "based on" used in the present disclosure does not mean "only based on" unless otherwise specified. In other words, the description "based on" means both "only based on" and "at least based on".

[0275] Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, the references to the 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.

[0276] The term “determining” as used in this disclosure may encompass a wide variety of actions. For example, “determining” may be considered to include judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry (e.g., searching in tables, databases, or other data structures), ascertaining, etc.

[0277] Furthermore, "judgment (decision)" may be considered as "judging (deciding)" things like receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory).

[0278] Furthermore, "judgment (decision)" can be considered as "judging (deciding)" something like resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment (decision)" can be considered as "judging (deciding)" something about an action.

[0279] Furthermore, "judgment (decision)" can be replaced with "assuming," "expecting," or "considering."

[0280] As used in this disclosure, the terms “connected,” “coupled,” and any variations thereof mean any direct or indirect connection or coupling between two or more elements, and may include one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be replaced with “access.”

[0281] In this disclosure, when two elements are connected, they can be considered to be “connected” or “coupled” to each other using one or more wires, cables, printed electrical connections, etc., and, in some non-exclusive and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, or optical domain (both visible and invisible).

[0282] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0283] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0284] In this disclosure, if articles are added by translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0285] Although the invention described herein has been explained in detail above, it will be clear to those skilled in the art that the invention described herein is not limited to the embodiments described herein. The invention described herein can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined in the claims. Therefore, the descriptions herein are for illustrative purposes only and do not imply any limitation on the invention described herein.

[0286] This application is based on Japanese Patent Application No. 2021-011131, filed on January 27, 2021. All of its contents are included here.

Claims

1. A transmission unit that transmits capability information indicating that it supports the difference between a first upper layer parameter that sets the maximum number of transmission ranks for a first physical uplink shared channel (PUSCH) repeated transmission using a single transmit / receive point (TRP) and a second upper layer parameter that sets the maximum number of transmission ranks for a second PUSCH repeated transmission using multiple TRPs, A receiving unit that receives one downlink control information (DCI) for the first PUSCH repeated transmission or the second PUSCH repeated transmission, A terminal having a control unit that controls the application of the TPMI and the transmission rank to the first PUSCH repeat transmission or the second PUSCH repeat transmission based on one or more pieces of information that indicate the transmit precoding matrix indicator (TPMI) and the transmit rank, which are included in the DCI.

2. The steps of transmitting capability information indicating that a first upper layer parameter for setting the maximum number of transmit ranks for a first physical uplink shared channel (PUSCH) repetitive transmission using a single transmit / receive point (TRP) and a second upper layer parameter for setting the maximum number of transmit ranks for a second PUSCH repetitive transmission using multiple TRPs are different, The steps include receiving one downlink control information (DCI) for the first push repeat transmission or the second push repeat transmission, A wireless communication method for a terminal, comprising the step of controlling the application of a transmit precoding matrix indicator (TPMI) and a transmit rank to a first push repeat transmission or a second push repeat transmission based on one or more pieces of information included in the DCI that indicate a transmit precoding matrix indicator (TPMI) and a transmit rank.

3. A receiving unit that receives capability information indicating that a first upper layer parameter for setting the maximum number of transmission ranks for a first physical uplink sharing channel (PUSCH) repeated transmission using a single transmission / reception point (TRP) and a second upper layer parameter for setting the maximum number of transmission ranks for a second PUSCH repeated transmission using multiple TRPs are different, A transmitting unit that transmits one downlink control information (DCI) for the first repeated push transmission or the second repeated push transmission, A base station having a control unit that controls the reception of the first push repeat transmission or the second push repeat transmission, wherein the TPMI and the transmit rank are applied based on one or more pieces of information that indicate the transmit precoding matrix indicator (TPMI) and the transmit rank, which are included in the DCI.

4. A system having a terminal and a base station, The aforementioned terminal is A transmitter unit that transmits capability information indicating that it supports different first upper-layer parameters for setting the maximum number of transmit ranks for a first physical uplink shared channel (PUSCH) repeated transmission using a single transmit / receive point (TRP), and a second upper-layer parameter for setting the maximum number of transmit ranks for a second PUSCH repeated transmission using multiple TRPs. A receiving unit that receives one downlink control information (DCI) for the first PUSCH repeated transmission or the second PUSCH repeated transmission, The DCI includes a control unit that controls the application of the TPMI and the transmission rank to the first PUSCH repeat transmission or the second PUSCH repeat transmission based on one or more pieces of information indicating the transmit precoding matrix indicator (TPMI) and the transmit rank, which are included in the DCI. The aforementioned base station is A system having a receiving unit that receives the aforementioned capability information.

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