Terminal, wireless communication method, base station and system

Abstract

A terminal according to an embodiment of the present disclosure is characterized by comprising a reception unit that receives at least one item of downlink control information (DCI) for a plurality of physical uplink shared channels (PUSCHs), and a control unit that controls the transmission of the PUSCHs on the basis of an expanded precoding information and number of layers field included in the DCI, wherein the control unit assumes that the number of antenna ports is set independently for each of the plurality of PUSCHs. This embodiment of the present disclosure makes it possible to suitably control PUSCH transmission repetitions even when using multiple TRPs.

Description

[Technical field]

[0001] The present disclosure relates to a terminal and a wireless communication method in a next-generation mobile communication system. 、 base station and systems Regarding. [Background technology]

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of achieving higher data rates and lower latency (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of achieving higher capacity and greater sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later, etc.) are also being considered. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention [Problem to be solved by the invention]

[0005] In 3GPP Rel.15, repeated transmission is supported for a UL data channel (e.g., an uplink shared channel (Physical Uplink Shared Channel (PUSCH))). The UE controls the transmission of PUSCH over multiple slots (e.g., K consecutive slots) based on a repetition factor K set by the network (e.g., a base station). In other words, when repeated transmission is performed, each PUSCH is transmitted in a different slot (e.g., slot unit).

[0006] On the other hand, in Rel.16 and later, when PUSCH is repeatedly transmitted, it is considered to transmit multiple PUSCHs within one slot. In other words, each PUSCH is transmitted in units shorter than a slot (for example, in units of subslots or minislots).

[0007] In addition, in NR, communications using one or multiple transmission / reception points (TRP) (multi-TRP) are being considered.

[0008] However, in the conventional NR specifications, there has been no sufficient consideration on how to control the repeated transmission of the PUSCH in the multi-panel / TRP. If the repeated transmission of the PUSCH in the multi-TRP is not performed appropriately, there is a risk that the throughput will decrease or the communication quality will deteriorate.

[0009] Therefore, the present disclosure relates to a terminal and a wireless communication method capable of appropriately controlling PUSCH repetitive transmission. 、 base station and systems One of the aims is to provide. [Means for solving the problem]

[0010] A terminal according to an embodiment of the present disclosure includes a receiving unit that receives downlink control information (DCI) indicating one or more measurement reference signal (SRS) resource indicators (SRIs); When the DCI indicates one SRI, the control unit 100 controls to perform a physical uplink shared channel (PUSCH) transmission using one transmission / reception point (TRP) based on a value of a specific number of lower-order bits among bits indicating a transmit precoding matrix indicator (TPMI), and controls to ignore values ​​of remaining bits among bits indicating the TPMI. When the DCI indicates multiple SRIs, the control unit 100 controls to perform a PUSCH transmission using multiple TRPs, and determines that the number of antenna ports of multiple SRS resources corresponding to the multiple SRIs are the same. and a control unit. Effect of the Invention

[0011] According to one embodiment of the present disclosure, PUSCH repetitive transmission can be appropriately controlled even when multi-TRP is applied. [Brief description of the drawings]

[0012] [Figure 1] 1A and 1B are diagrams illustrating an example of repeated transmission of a PUSCH. [Diagram 2] 2A and 2B are diagrams showing examples of invalid symbol patterns. [Diagram 3] 3A and 3B are diagrams showing an example of nominal repetitions and actual repetitions. [Figure 4] FIG. 4 is a diagram illustrating an example of repeated transmission of PUSCH in multi-TRP. [Diagram 5] FIG. 5 is a diagram showing an example of association between the extended precoding information and layer number fields and the SRI. [Figure 6] 6A and 6B are diagrams showing other examples of associations between the extended precoding information and layer number fields and the SRI. [Figure 7] 7A and 7B are diagrams illustrating an example of an extended precoding information and layer number field applied to a PUSCH. [Figure 8] FIG. 8 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 9] FIG. 9 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 10]FIG. 10 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 11] FIG. 11 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] (Repeat sending) In Rel.15, repeated transmission is supported for data transmission. For example, a base station (network (NW), gNB) repeats DL data (e.g., downlink shared channel (PDSCH)) a predetermined number of times. Alternatively, a UE repeats UL data (e.g., uplink shared channel (PUSCH)) a predetermined number of times.

[0014] FIG. 1A is a diagram showing an example of repeated transmission of PUSCH. In FIG. 1A, an example is shown in which a predetermined number of repeated PUSCHs are scheduled by a single DCI. The number of repetitions is also called a repetition factor K or an aggregation factor K.

[0015] In FIG. 1A, the repetition factor K=4, but the value of K is not limited to this. In addition, the n-th repetition may be called the n-th transmission occasion, etc., and may be identified by a repetition index k (0≦k≦K-1). In addition, FIG. 1A shows repeated transmission of a PUSCH dynamically scheduled by DCI (e.g., a dynamic grant-based PUSCH), but may be applied to repeated transmission of a configuration grant-based PUSCH.

[0016] For example, in Fig. 1A, the UE quasi-statically receives information indicating the repetition factor K (e.g., aggregationFactorUL or aggregationFactorDL) through higher layer signaling. Here, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0017] The MAC signaling may be, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (MAC PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), etc.

[0018] The UE controls reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) of the PDSCH or transmission processing (e.g., at least one of transmission, mapping, modulation, and coding) of the PUSCH in K consecutive slots based on at least one of the following field values ​​(or information indicated by the field values) in the DCI: Allocation of time domain resources (e.g. starting symbol, number of symbols in each slot, etc.); Allocation of frequency domain resources (e.g., a certain number of resource blocks (RBs) and a certain number of resource block groups (RBGs)), Modulation and Coding Scheme (MCS) index, Configuration of the PUSCH demodulation reference signal (DMRS: Demodulation Reference Signal), PUSCH spatial relation info or Transmission Configuration Indication (TCI) state (TCI-state).

[0019] The same symbol allocation may be applied between K consecutive slots. Figure 1A shows a case where the PUSCH in each slot is assigned to a predetermined number of symbols from the beginning of the slot. The same symbol allocation between slots may be determined as described above in the time domain resource allocation.

[0020] For example, the UE may determine symbol allocation in each slot based on a start symbol S and a number of symbols L (e.g., Start and Length Indicator (SLIV)) determined based on a value m of a predetermined field (e.g., a TDRA field) in the DCI. The UE may determine the first slot based on K2 information determined based on a value m of a predetermined field (e.g., a TDRA field) in the DCI.

[0021] On the other hand, among the K consecutive slots, the redundancy versions (RVs) applied to the TBs based on the same data may be the same or at least partially different. For example, the RV applied to the TB in the n-th slot (transmission opportunity, repetition) may be determined based on the value of a predetermined field (e.g., the RV field) in the DCI.

[0022] If the communication direction of the resources allocated in K consecutive slots differs in at least one symbol from the UL, DL, or Flexible of each slot specified by at least one of the uplink / downlink communication direction indication information for TDD control (e.g., RRC IE “TDD-UL-DL-ConfigCommon” and “TDD-UL-DL-ConfigDedicated”) and the slot format indicator of the DCI (e.g., DCI format 2_0), the resources of the slot including that symbol may not be transmitted (or received).

[0023] In Rel. 15, as shown in FIG. 1A, PUSCH is repeatedly transmitted across multiple slots (slot units), but in Rel. 16 and later, it is expected that PUSCH will be repeatedly transmitted in units shorter than slots (for example, subslot units, minislot units, or units of a specified number of symbols) (see FIG. 1B).

[0024] In FIG. 1B, the repetition factor K=4, but the value of K is not limited to this. In addition, the n-th repetition may be called the n-th transmission occasion, etc., and may be identified by a repetition index k (0≦k≦K-1). In addition, FIG. 1B shows repeated transmission of a PUSCH dynamically scheduled by DCI (e.g., a dynamic grant-based PUSCH), but may be applied to repeated transmission of a configuration grant-based PUSCH.

[0025] The UE may determine symbol allocation for PUSCH transmission (e.g., PUSCH with k=0) in a predetermined slot based on a start symbol S and a number of symbols L (e.g., StartSymbol and length) determined based on a value m of a predetermined field (e.g., TDRA field) in DCI of the PUSCH. Note that the UE may determine the predetermined slot based on Ks information determined based on a value m of a predetermined field (e.g., TDRA field) of the DCI.

[0026] The UE may dynamically receive information indicating the repetition factor K (e.g., numberofrepetitions) through downlink control information. The repetition factor may be determined based on a value m of a predetermined field (e.g., a TDRA field) in the DCI. For example, a table may be supported that defines the correspondence between the bit value notified by the DCI, the repetition factor K, the start symbol S, and the number of symbols L.

[0027] The slot-based repetition transmission shown in FIG. 1A may be referred to as repetition transmission type A (e.g., PUSCH repetition Type A), and the subslot-based repetition transmission shown in FIG. 1B may be referred to as repetition transmission type B (e.g., PUSCH repetition Type B).

[0028] The UE may be configured to apply at least one of repetitive transmission type A and repetitive transmission type B. For example, the base station may notify the UE of the repetitive transmission type applied by the UE by higher layer signaling (e.g., PUSCHRepTypeIndicator).

[0029] Either repetitive transmission type A or repetitive transmission type B may be configured in the UE for each DCI format for which the PUSCH is scheduled.

[0030] For example, for a first DCI format (e.g., DCI format 0_1), if higher layer signaling (e.g., PUSCHRepTypeIndicator-AorDCIFormat0_1) is set to repetitive transmission type B (e.g., PUSCH-RepTypeB), the UE applies repetitive transmission type B for PUSCH repetitive transmission scheduled in the first DCI format. Otherwise (e.g., if PUSCH-RepTypeB is not set or if PUSCH-RepTypA is set), the UE applies repetitive transmission type A for PUSCH repetitive transmission scheduled in the first DCI format.

[0031] (Invalid symbol pattern) When applying repetitive transmission type B to PUSCH transmission, it is also considered to notify a UE of information on symbols (or symbol patterns) that cannot be used for PUSCH transmission. The symbol pattern that cannot be used for PUSCH transmission may be called an invalid symbol pattern, an invalid symbol pattern, or the like.

[0032] It is being considered to notify the invalid symbol pattern by using at least one of higher layer signaling and DCI. The DCI may be in a predetermined DCI format (for example, at least one of DCI formats 0_1 and 0_2).

[0033] For example, information about an invalid symbol pattern that cannot be used for PUSCH transmission is notified to the UE by using a first higher layer parameter. Also, whether or not the information about the invalid symbol pattern is applied may be notified to the UE by using DCI. In this case, a bit field (a field for notifying whether or not an invalid symbol pattern is applied) for indicating whether or not the information about the invalid symbol pattern is applied may be set in the DCI.

[0034] Also, the second higher layer parameter may be used to notify the UE of whether or not a notification field (or additional bit) in the DCI is set. In other words, when the UE is notified of information on an invalid symbol pattern by the first higher layer parameter, the UE may determine whether or not to apply the information on the invalid symbol pattern based on the second higher layer parameter and the DCI.

[0035] When the first higher layer parameter is not notified or configured, the UE may control the transmission of the PUSCH without considering the invalid symbol pattern. When the first higher layer parameter is notified or configured, the UE may determine whether or not to apply the invalid symbol pattern based on the second higher layer parameter and the DCI. For example, when the second higher layer parameter instructs the DCI to add an additional bit (or a predetermined field) indicating whether or not to apply the invalid symbol pattern, the UE may determine whether or not to apply the invalid symbol pattern based on the predetermined field.

[0036] The first higher layer parameter may be information for notifying a symbol pattern that is invalid for PUSCH transmission, and may be in the form of a bitmap, for example (see FIG. 2A). FIG. 2A illustrates an example in which an invalid symbol pattern is defined by a bitmap (1-D bitmap) for the time domain. The UE may determine resources available for PUSCH transmission in one or more frequency bandwidths (e.g., BWP) based on information about the invalid symbol pattern (see FIG. 2B).

[0037] Here, a case is shown in which one or a common invalid symbol pattern is applied to a plurality of BWPs, but a different invalid symbol pattern may be set or applied to each BWP.

[0038] (Nominal repetitions / Actual repetitions) When repeat transmission type B is applied and repeat transmission is performed in subslot units, there may be cases where a certain repeat transmission crosses a slot boundary depending on the repetition coefficient (K) and the data allocation unit, etc.

[0039] Figure 3A shows an example of a case where repetition transmission type B is applied when the repetition factor (K) is 4 and the PUSCH length (L) is 4. In Figure 3A, a PUSCH with k=3 is arranged across a slot boundary. In this case, the PUSCH may be divided (or segmented) based on the slot boundary for transmission (see Figure 3B).

[0040] Also, a case is assumed in which a slot contains a symbol that cannot be used for PUSCH transmission (for example, DL symbol or invalid symbol). FIG. 3A shows a case in which a symbol that cannot be used for PUSCH transmission (here, DL symbol) is included in some symbols in which the PUSCH with k=1 is arranged. In such a case, PUSCH transmission may be performed using symbols other than the DL symbol (see FIG. 3B).

[0041] In the case where DL symbols (or invalid symbols) are included in symbols other than both ends of the assigned symbols of a certain PUSCH, PUSCH transmission may be performed using symbols other than the DL symbol portion. In this case, the PUSCH may be divided (or segmented).

[0042] FIG. 3B shows a case in which, in subslot-based repeat transmission, a PUSCH with k=1 (Rep#2) is divided into two by a DL symbol (Rep#2-1 and #2-2), and a PUSCH with k=3 (Rep#4) is divided into two by a slot boundary (Rep#4-1 and #4-2).

[0043] Note that the repetitive transmission before considering DL symbols, invalid symbols, or slot boundaries (FIG. 3A) may be called nominal repetitions. The repetitive transmission after considering DL symbols, invalid symbols, or slot boundaries (FIG. 3B) may be called actual repetitions.

[0044] (Spatial Relationships for SRS, PUSCH) In Rel.15 NR, a UE may receive information (SRS configuration information, for example, parameters in the RRC control element "SRS-Config") used to transmit a measurement reference signal (e.g., a Sounding Reference Signal (SRS)).

[0045] Specifically, the UE may receive at least one of information regarding one or more SRS resource sets (SRS resource set information, e.g., the RRC control element "SRS-ResourceSet") and information regarding one or more SRS resources (SRS resource information, e.g., the RRC control element "SRS-Resource").

[0046] An SRS resource set may be associated with (group together) a number of SRS resources, each of which may be identified by an SRS Resource Indicator (SRI) or SRS Resource Identifier (ID).

[0047] The 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., Periodic SRS, Semi-Persistent SRS, or Aperiodic SRS), and information on SRS usage.

[0048] Here, the SRS resource type may indicate any one of periodic SRS (P-SRS), semi-persistent SRS (SP-SRS), and aperiodic SRS (A-SRS). Note that the UE may transmit the P-SRS and SP-SRS periodically (or periodically after activation) and transmit the A-SRS based on an SRS request of the DCI.

[0049] Furthermore, the use (RRC parameter "usage" and L1 (Layer-1) parameter "SRS-SetUse") may be, for example, beam management, codebook (CB), noncodebook (NCB), antenna switching, etc. The SRS for codebook or noncodebook use may be used to determine a precoder for codebook-based or noncodebook-based PUSCH transmission based on the SRI.

[0050] For example, the UE may determine a precoder for PUSCH transmission based on the SRI, a Transmitted Rank Indicator (TRI), and a Transmitted Precoding Matrix Indicator (TPMI) in the case of codebook-based transmission. The UE may determine a precoder for PUSCH transmission based on the SRI in the case of non-codebook-based transmission.

[0051] The SRS resource information may include an SRS resource ID (SRS-ResourceId), an SRS port number, an SRS port number, a transmission Comb, an SRS resource mapping (e.g., time and / or frequency resource position, resource offset, resource period, repetition number, SRS symbol number, SRS bandwidth, etc.), hopping related information, an SRS resource type, a sequence ID, spatial relationship information of the SRS, etc.

[0052] The spatial relationship information of the SRS (e.g., the RRC information element "spatialRelationInfo") may indicate spatial relationship information between a certain reference signal and the SRS. The certain 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 (e.g., another SRS). The SS / PBCH block may be referred to as a Synchronization Signal Block (SSB).

[0053] The spatial relationship information of the SRS may include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID as an index of the predetermined reference signal.

[0054] In the present disclosure, the SSB index, the SSB resource ID, and the SSB Resource Indicator (SSBRI) may be interchangeable. Also, the CSI-RS index, the CSI-RS resource ID, and the CSI-RS Resource Indicator (CRI) may be interchangeable. Also, the SRS index, the SRS resource ID, and the SRI may be interchangeable.

[0055] The spatial relationship information of the SRS may include a serving cell index, a BWP index (BWP ID), etc., corresponding to the above-mentioned predetermined reference signal.

[0056] When the UE is configured with spatial relationship information regarding the SSB or CSI-RS and the SRS for a certain SRS resource, the UE may transmit the SRS resource using the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter (spatial domain receive filter) 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.

[0057] When the UE is configured with spatial relationship information regarding a certain SRS (target SRS) resource between another SRS (reference SRS) and the SRS (target SRS), the UE may transmit the target SRS resource using the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter (spatial domain transmit filter) for transmitting the reference SRS. That is, in this case, the UE may assume that the UE transmit beam of the reference SRS and the UE transmit beam of the target SRS are the same.

[0058] The UE may determine the spatial relationship of the PUSCH scheduled by the DCI (e.g., DCI format 0_1) based on a value of a predetermined field (e.g., an SRS resource identifier (SRI) field) in the DCI. Specifically, the UE may use spatial relationship information of the SRS resource (e.g., the RRC information element "spatialRelationInfo") determined based on the value of the predetermined field (e.g., the SRI) for PUSCH transmission.

[0059] When using codebook-based transmission for PUSCH, the UE may be configured by RRC with two SRS resources per SRS resource set 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 be configured by RRC with four SRS resources per SRS resource set and one of the four SRS resources may be indicated by DCI (2-bit SRI field).

[0060] (TPMI and transmission rank) In Rel. 16, it is considered that the Transmitted Precoding Matrix Indicator (TPMI) and transmission rank for codebook-based PUSCH transmission will be specified by specific fields (e.g., precoding information and number of layers fields) included in downlink control information (e.g., DCI format 0_1).

[0061] The precoder that the UE uses for codebook-based PUSCH transmission may be selected from an uplink codebook with a number of antenna ports equal to the value configured in the higher layer parameter configured for the SRS resources (e.g., nrofSRS-Ports).

[0062] The size (number of bits) of this particular field is variable depending on the number of antenna ports for PUSCH (eg, the number of ports indicated by nrofSRS-Ports above) and some higher layer parameters.

[0063] The particular field may be a 0 bit if the higher layer parameters (eg, txConfig) configured for the UE are set to non-codebook.

[0064] Also, the particular field may be a 0 bit when a higher layer parameter (eg, txConfig) configured for the UE for one antenna port is set to a codebook.

[0065] Furthermore, for four antenna ports, when an upper layer parameter (e.g., txConfig) configured for the UE is set to a codebook, the particular field may have a bit length of 2 to 6 bits based on at least one of another upper layer parameter configured for the UE and the presence or absence (enabled or disabled) of a transform precoder.

[0066] Furthermore, the particular field may have a bit length of 1 to 4 bits when an upper layer parameter (e.g., txConfig) configured for the UE for two antenna ports is set to a codebook, based on at least one of another upper layer parameter configured for the UE and the presence or absence of a transform precoder (enabled or disabled).

[0067] The other upper layer parameter may be at least one of a parameter for specifying a full power transmission mode of the UL (e.g., ul-FullPowerTransmission), a parameter indicating a maximum value of the UL transmission rank (e.g., maxRank), a parameter indicating a subset of a certain precoding matrix indicator (PMI) (e.g., codebookSubset), and a parameter for specifying a transform precoder (e.g., transformPrecoder).

[0068] (Multi-TRP) In NR, one or more transmission / reception points (TRPs) (multi-TRPs) are considered to perform DL transmission to a UE using one or more panels (multi-panels). Also, it is considered that a UE performs UL transmission to one or more TRPs (see Figure 4).

[0069] The TRPs may correspond to the same or different cell identifiers (Cell Identifiers (IDs)), which may be physical or virtual cell IDs.

[0070] However, in the conventional NR specifications, there has been no sufficient consideration on how to control the repeated transmission of the PUSCH in the multi-panel / TRP. If the repeated transmission of the PUSCH in the multi-TRP is not performed appropriately, there is a risk that the throughput will decrease or the communication quality will deteriorate.

[0071] More specifically, in order to repeatedly transmit PUSCH in multiple TRPs by one DCI, it is considered that multiple SRI / SRI combinations for multiple TRPs are indicated by the DCI. In this case, considering that the channel conditions between the UE and different TRPs are different, it is preferable that different TPMIs correspond to different SRI / SRI combinations.

[0072] However, there has been insufficient consideration of a method for indicating a plurality of TPMIs using one DCI. Therefore, the present inventors have conceived of a method for controlling PUSCH repeated transmission that solves the above problem.

[0073] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0074] In the present disclosure, port, panel, beam, Uplink (UL) transmitting entity, TRP, spatial relationship information (SRI), spatial relationship, control resource set (COntrol REsource SET (CORESET)), PDSCH, codeword, base station, specific antenna port (e.g., Demodulation Reference Signal (DMRS) port), specific antenna port group (e.g., DMRS port group), specific group (e.g., Code Division Multiplexing (CDM) group, specific reference signal group, CORESET group, panel group, beam group, spatial relationship group, PUCCH group), CORESET pool may be read as mutually interchangeable. Also, panel identifier (ID) and panel may be read as mutually interchangeable. TRP ID and TRP may be read as mutually interchangeable.

[0075] In the present disclosure, the terms index, ID, indicator, and resource ID may be interchangeable.

[0076] In the present disclosure, "A / B" may mean "at least one of A and B."

[0077] In the present disclosure, the terms list, group, cluster, subset, etc. may be interchangeable. In the present disclosure, the terms spatial relation information (SRI), SRS resource indicator (SRI, or SRI field), SRS resource, precoder, etc. may be interchangeable.

[0078] In this disclosure, spatial relationship information (SRI), SRI combination, SRI for codebook-based transmission, non-codebook based SRI combination, spatialRelationInfo, UL TCI, TCI state, Unified TCI, QCL, etc. may be interpreted as interchangeable.

[0079] In the present disclosure, the first TRP and the second TRP may be read 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 the like.

[0080] In the following embodiments, a PUSCH across multiple TRPs may be interchangeably read as a repeated PUSCH across multiple TRPs, simply a repeated PUSCH, repeated transmission, multiple PUSCH transmission, etc.

[0081] In each embodiment of the present disclosure, PUSCH transmission across multiple TRPs using one DCI and codebook-based PUSCH transmission will be described as examples, but PUSCH transmission to which each embodiment can be applied is not limited to these.

[0082] (Wireless communication method) <First embodiment> In the first embodiment, when repeating transmission of PUSCH across multiple TRPs, the same number of antenna ports may be set / instructed for different TRPs (different PUSCHs). In other words, the same number of antenna ports may be set / instructed in common for multiple TRPs (multiple PUSCHs). In this case, the UE may assume that the same number of antenna ports is set / instructed in common for multiple TRPs (multiple PUSCHs).

[0083] In this case, the UE may assume or expect that the DCI indicates multiple SRIs corresponding to multiple SRS resources having the same value of a particular higher layer parameter (e.g., nrofSRS-Ports).

[0084] At this time, the number of antenna ports for codebook determination for PUSCH across multiple TRPs may also be configured / instructed to the UE.

[0085] The number of antenna ports for determining the codebook (e.g., for referring to the codebook) may be configured in the UE by higher layer signaling (e.g., RRC information element "PUSCH-Config" for PUSCH configuration) or may be indicated to the UE by a DCI field (e.g., a number of antenna ports field). Note that the codepoint of the number of antenna ports field may be mapped to 1, 2, 4, or other supported number of antenna ports.

[0086] The number of antenna ports for the codebook determination may be independent of the number of antenna ports for SRS resources (e.g., given by the higher layer parameter "nrofSRS-Ports"). In other words, the number of antenna ports for the codebook may be signaled to the UE by a higher layer parameter different from the higher layer parameter of the number of antenna ports for SRS resources, or by a number of antenna ports field.

[0087] In the following, a method of indicating a specific field (for example, a precoding information and a number of layers field) included in DCI for indicating TPMI in the first embodiment will be described. The UE may determine the TPMI for PUSCH transmission according to at least one of the indication method 1-1 or the indication method 1-2 described below. In the following, the precoding information and the number of layers field will be described, but the precoding information and the number of layers field of the present disclosure may be replaced with a specific field for indicating TPMI.

[0088] [Instruction method 1-1] The precoding information and number of layers fields included in the scheduling DCI may have the same number of bits as the number of bits specified in Rel.15 / 16.

[0089] At this time, one precoding information and layer number field included in one DCI may be indicated to the UE. In other words, the UE may determine a TPMI based on one precoding information and layer number field included in one DCI. Then, the UE may apply the precoding information and layer number field / TPMI to PUSCH transmission of different TRPs.

[0090] [Instruction method 1-2] The precoding information and layer number fields included in the scheduling DCI may have a bit number extended to a specific number compared to Rel.15 / 16. The specific number may be represented as X×M.

[0091] The above X may be determined based on the size of the precoding information and the number of layers field included in the DCI for UL transmission for one TRP. For example, the above X may be determined based on at least one of the number of antenna ports and the number set by a specific upper layer parameter (e.g., at least one of ul-FullPowerTransmission, maxRank, codebookSubset, and transformPrecoder).

[0092] Also, the above X may be a fixed value. The UE may assume that the above X has a fixed size, regardless of the number of antenna ports configured in a higher layer. Also, the UE may assume that the above X has a fixed size, regardless of the value of the number of antenna ports field (the number of antenna ports indicated by the number of antenna ports field).

[0093] In the existing NR specifications, in the case of codebook-based transmission, the size of the precoding information field is variable based on the number of antenna ports that is set semi-statically (e.g., the same number of ports as the number of SRS ports indicated by the higher layer parameter "nrofSRS-Ports"). On the other hand, when the number of antenna ports is dynamically specified by the number of antenna ports field, a fixed size of the precoding information field is preferable (because it becomes difficult to perform proper decoding if the size of the DCI changes dynamically).

[0094] The value of X may be predefined by a specification, may be set by higher layer signaling, or may be determined based on UE capabilities.

[0095] The above M may be the number of TRPs or the number of spatial relationship information (SRI) that may be indicated for PUSCH transmission across multiple TRPs.

[0096] In this case, if the extended precoding information and layer number field are divided into a specific number of bits (e.g., 2, 4, etc.), a specific number of bits smaller (or larger) than the xth bit (x is an arbitrary integer) may be associated with the xth SRI indicated by the DCI.

[0097] FIG. 5 is a diagram showing an example of the correspondence between the extended precoding information and number of layers field and the SRI. In the example shown in FIG. 5, the number of bits of the extended precoding information and number of layers field is 4, and M=2 is shown. In the example of FIG. 5, the left side of the precoding information and number of layers field indicates lower order bits, and the right side indicates higher order bits. In this case, the lowest two bits (n 0 and n 1 ) corresponds to the first SRI (used for PUSCH transmission by the first SRI), and the two most significant bits (n 2 and n 3 ) corresponds to the second SRI (used for PUSCH transmission by the second SRI).

[0098] Note that in the example shown in FIG. 5, the precoding information and number of layers fields may have the same size in each PUSCH transmission opportunity (each TRP).

[0099] In the figures shown in this disclosure, the number of bits and values ​​of the SRI, precoding information, and layer number fields are all examples and are not limited to these. In addition, in the figures shown in this disclosure, the precoding information and layer number fields indicate lower bits on the left side and higher bits on the right side for convenience, but are not limited to these.

[0100] According to the first embodiment described above, when PUSCH across multiple TRPs is repeatedly transmitted, it is possible to appropriately indicate the TPMI even if the same number of antenna ports is set / instructed for PUSCHs to different TRPs.

[0101] <Second embodiment> In the second embodiment, when repeating transmission of PUSCH across multiple TRPs, different / same antenna port numbers may be set / instructed for different TRPs (different PUSCHs). In other words, the antenna port numbers may be set / instructed separately for multiple TRPs (multiple PUSCHs). In this case, the UE may assume that the antenna port numbers are set / instructed independently for each of the multiple TRPs (multiple PUSCHs).

[0102] In this case, the UE may assume or expect that the DCI indicates multiple SRIs corresponding to multiple SRS resources having different values ​​of a particular higher layer parameter (e.g., nrofSRS-Ports).

[0103] In addition, at this time, the number of antenna ports for codebook determination for PUSCH across multiple TRPs may be configured / instructed to the UE in the same manner as described in the first embodiment.

[0104] The following describes a method of indicating a specific field (for example, a precoding information field and a layer number field) included in DCI for indicating a TPMI in the second embodiment. The UE may determine the TPMI for PUSCH transmission according to the indication method 2 described below.

[0105] In addition, when repeatedly transmitting PUSCH across multiple TRPs, if the same number of antenna ports is set / instructed for different TRPs, the method described in the first embodiment may be followed.

[0106] [Instruction method 2] The precoding information and layer number fields included in the scheduling DCI may have a bit number extended to a specific number compared to Rel. 15 / 16. The specific number is X 1 +X 2 +…+X M It may be expressed as:

[0107] Above X i (i is any integer from 1 to M) may be determined based on the size of the precoding information and layer number field included in the DCI for UL transmission for the i-th TRP. For example, the above X i may be determined based on at least one of the number of antenna ports and the number set by a specific higher layer parameter (e.g., at least one of ul-FullPowerTransmission, maxRank, codebookSubset, and transformPrecoder). i may be set to a fixed value.

[0108] The above M may be the number of TRPs or the number of spatial relationship information (SRI) that may be indicated for PUSCH transmission across multiple TRPs.

[0109] In this case, the extended precoding information and layer number fields are X i (i is any integer between 1 and M) 1 +X 2 +…+X i-1 +1st smallest (or largest) bit, X 1 +X 2 +…+X i The first through i-th bits may be associated with the i-th SRI indicated by the DCI.

[0110] In addition, X 1 , X 2 , …, X M The values ​​of each of the above may be the same or different.

[0111] FIG. 6A is a diagram showing another example of the correspondence between the extended precoding information and number of layers field and the SRI. In the example shown in FIG. 6A, the case of M=2 is shown, where the precoding information and number of layers field for the first TRP is 2 bits, and the precoding information and number of layers field for the second TRP is 4 bits. In this case, certain 2 bits (n 0 and n 1 ) corresponds to the first SRI for the first TRP, and the remaining 4 bits (n 2 From 5 ) corresponds to the second SRI for the second TRP.

[0112] Note that in the example shown in FIG. 6A, the precoding information and number of layers fields may have different sizes in each PUSCH transmission opportunity (each TRP), and the sizes may depend on the settings of higher layer parameters.

[0113] FIG. 6B is a diagram showing another example of the correspondence between the extended precoding information and number of layers field and the SRI. In the example shown in FIG. 6B, the case of M=2 is shown, and the precoding information and number of layers field for the first TRP and the second TRP are fixed at 6 bits each. In this case, a certain 6 bits (n 0 From 5 ) corresponds to the first SRI for the first TRP, and the remaining 6 bits (n 6 From 11 ) corresponds to the second SRI for the second TRP.

[0114] According to the second embodiment described above, when repeatedly transmitting PUSCH across multiple TRPs, it is possible to appropriately indicate the TPMI even if different numbers of antenna ports are set / instructed for PUSCH to different TRPs.

[0115] <Modifications of the First and Second Embodiments> When dynamic switching between PUSCH transmission using one TRP and PUSCH transmission using multiple TRPs is supported (e.g., when one or multiple SRIs are allowed to be indicated by DCI), one or multiple SRIs may be indicated by DCI. In this case, when one SRI is specified by DCI, the extended precoding information and layer number field may follow at least one of the following method 1 or method 2.

[0116] 《Method 1》 The UE may determine that a specific number (e.g., 2M) of bits of the precoding information and layer number field included in the DCI is valid bits. In other words, the UE may apply a specific number (e.g., 2M) of bits of the precoding information and layer number field included in the DCI to PUSCH transmission. In this case, M may be the number of TRPs, or the maximum number of SRIs that can be indicated for PUSCH transmission by multiple TRPs.

[0117] A part of the 2M bits of the DCI precoding information and number of layers field (for example, 2 bits) may indicate the precoding information and number of layers corresponding to any SRI. The other bits (the remaining 2M-2 bits) may be set to the same value as the part of the bits.

[0118] 7A is a diagram showing an example of an extended precoding information and layer number field applied to a PUSCH. In this case, the lowest two bits (n 0 and n 1 ) is applied to PUSCH transmission. Meanwhile, the remaining two bits (n 2 and n 3 ) are each valid bits, i.e., n 0 and n 1 is set to the same value as

[0119] 《Method 2》 The UE may determine that a specific number (e.g., 2) of lowest (or highest) bits in the precoding information and number of layers field included in the DCI are valid bits. The remaining bits may be set to a fixed value (e.g., 0 or 1). The UE may also ignore the remaining bits. This specific number may correspond to the size of the precoding information and number of layers field for one TRP, may be determined based on the number of antenna ports, etc., as described above, or may be a fixed number of bits.

[0120] FIG. 7B is a diagram showing an example of an extended precoding information and layer number field applied to the PUSCH. In this case, the lowest two bits (n 0 and n 1 ) is applied to PUSCH transmission. Meanwhile, the remaining two bits (n 2 and n 3 ) is set to a fixed value (here, 0).

[0121] According to the above-described modifications of the first and second embodiments, regardless of whether the SRI / SRI combination specified by the DCI is one or multiple, PUSCH transmission can be appropriately controlled by utilizing the extended precoding information and number of layers fields.

[0122] <Third embodiment> In the third embodiment, UE capability related to the precoding information and the layer number field will be described. The UE may report (transmit) to the NW whether it has the capability.

[0123] The UE capability for the precoding information and number of layers fields may be defined as whether to use the same / different antenna ports for different TRPs (different PUSCH transmissions).

[0124] Also, the UE capability regarding the precoding information and number of layers fields may be defined as whether different TPMIs are indicated for different TRPs (different PUSCH transmissions).

[0125] Each embodiment of the present disclosure may be applied under at least one of the following conditions: when the UE reports the UE capability corresponding to the at least one of the above to the NW, and when the at least one UE capability is set / activated / instructed to the UE by higher layer signaling. Each embodiment of the present disclosure may be applied to the UE when a specific higher layer parameter (e.g., information for enabling the extended precoding information and layer number field, information for setting a TPMI greater than 2, a parameter for enabling M-TRP repetition, etc.) is set / activated / instructed to the UE.

[0126] (Wireless communication system) A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination of these methods.

[0127] 8 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0128] Furthermore, the wireless communication system 1 may support dual connectivity between a plurality of 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 the like.

[0129] 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.

[0130] The wireless communication system 1 may support dual connectivity between multiple base stations in the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0131] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged in the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located in at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as a base station 10.

[0132] 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).

[0133] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. 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 correspond to a frequency band higher than FR2.

[0134] Furthermore, the user terminal 20 may perform communication in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0135] A plurality of base stations (e.g., RRH) 10 may be connected by wire (e.g., optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and base station 12 corresponding to a relay station (relay) may be called an IAB node.

[0136] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0137] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0138] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), 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.

[0139] The radio access scheme may be called a waveform. In the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0140] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as a downlink channel.

[0141] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0142] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0143] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information of at least one of the PDSCH and the PUSCH.

[0144] In addition, DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

[0145] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or multiple search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0146] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in the present disclosure may be read as interchangeable terms.

[0147] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0148] In the present disclosure, a downlink, an uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning of the channels.

[0149] 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 the 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.

[0150] 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 the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) may be called an SS / PBCH block, an SS Block (SSB), or the like. In addition, the SS, SSB, and the like may also be called a reference signal.

[0151] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may be called a user equipment specific reference signal (UE-specific reference signal).

[0152] (base station) 9 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.

[0153] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0154] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0155] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission and reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0156] The transceiver 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 transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0157] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0158] The transmitting / receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0159] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0160] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0161] The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0162] The transceiver 120 (transmission processing unit 1211) may perform transmission processing 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 on the bit string to be transmitted, and output a baseband signal.

[0163] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna .

[0164] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna .

[0165] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0166] The transceiver 120 (measurement unit 123) may perform measurements on 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 measure received power (e.g., Reference Signal Received Power (RSRP)), received 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.

[0167] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data) for the user terminal 20, control plane data, etc.

[0168] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0169] The transceiver 120 may transmit one Downlink Control Information (DCI) for a plurality of Physical Uplink Shared Channels (PUSCHs). The controller 110 may control reception of the PUSCHs transmitted based on extended precoding information and a layer number field included in the DCI. The controller 110 may set the number of antenna ports independently for each of the plurality of PUSCHs (first and second embodiments).

[0170] (User terminal) 10 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0171] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0172] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0173] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission / reception unit 220.

[0174] 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 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting / receiving circuit, and the like, which are described based on common understanding in the technical field related to the present disclosure.

[0175] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0176] The transmitting / receiving antenna 230 can be composed of an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

[0177] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0178] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0179] The transceiver 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, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0180] The transceiver 220 (transmission processing unit 2211) may perform transmission processing 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 on the bit sequence to be transmitted, and output a baseband signal.

[0181] Whether or not to apply the DFT process may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver 220 (transmission processor 2211) may perform the DFT process as the transmission process to transmit the channel using a DFT-s-OFDM waveform, and may not perform the DFT process as the transmission process if transform precoding is enabled for the channel.

[0182] The transceiver unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna 230.

[0183] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna 230.

[0184] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0185] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may 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.

[0186] In addition, the transmitting section and the receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0187] The transceiver 220 may receive one Downlink Control Information (DCI) for a plurality of Physical Uplink Shared Channels (PUSCHs). The controller 210 may control transmission of the PUSCHs based on extended precoding information and a layer number field included in the DCI. The controller 210 may assume that the number of antenna ports is set independently for each of the plurality of PUSCHs (first and second embodiments).

[0188] The control unit 210 may control the transmission of the PUSCH based on spatial relationship information (SRI) corresponding to each of the bits of the extended precoding information and layer number field divided into a specific number (first and second embodiments).

[0189] The control unit 210 may determine the number of bits of the extended precoding information and layer number fields based on at least one of the number set based on a specific upper layer parameter, the number of PUSCHs, and the number of spatial relationship information (SRI) (first and second embodiments).

[0190] The control unit 210 may perform control to report capability information defined as whether or not different antenna ports are used for the multiple PUSCHs, or whether or not different transmit precoding matrix indicators are indicated for the multiple PUSCHs (third embodiment).

[0191] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically combined, or may be realized by using two or more devices that are physically or logically separated and directly or indirectly connected (for example, by wire, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0192] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission may be called a transmitting unit, a transmitter, and the like. In either case, as described above, the method of realization is not particularly limited.

[0193] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 11 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0194] In this disclosure, the terms "apparatus," "circuit," "device," "section," "unit," and the like can be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0195] For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processes may be performed by one processor, or the processes may be performed by two or more processors simultaneously, sequentially, or in other manners. Also, the processor 1001 may be implemented by one or more chips.

[0196] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0197] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0198] Moreover, the processor 1001 reads out programs (program codes), 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 according to the programs. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks may be realized in a similar manner.

[0199] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be called a register, a cache, a main memory (primary storage device), and the like. The memory 1002 can store a program (program code), a software module, and the like that is executable to implement a wireless communication method according to an embodiment of the present disclosure.

[0200] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile 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 referred to as an auxiliary storage device.

[0201] The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0202] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0203] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0204] 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), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0205] (Modification) In addition, the terms explained in this disclosure and the terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be read as mutually interchangeable. A signal may also be a message. A reference signal may also be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applied standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, etc.

[0206] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed 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.

[0207] Here, the numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0208] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may also be a time unit based on numerology.

[0209] A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0210] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. A different name may be used for the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be read as interchangeable with each other.

[0211] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0212] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0213] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0214] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0215] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc.

[0216] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0217] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0218] In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. Each of one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0219] In addition, one or more RBs may be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0220] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0221] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a numerology on a carrier, where the common RBs may be identified by the index of the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0222] The BWP may include a UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0223] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell", "carrier", etc. in this disclosure may be replaced with "BWP".

[0224] The above-mentioned structures of radio frames, subframes, slots, minislots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

[0225] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0226] The names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0227] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. 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 voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0228] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via a plurality of network nodes.

[0229] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0230] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0231] The physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, by using a MAC Control Element (CE).

[0232] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0233] The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or by comparing numerical values ​​(e.g., with a predetermined value).

[0234] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0235] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0236] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0237] 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," "panel," and the like may be used interchangeably.

[0238] In this disclosure, terms such as "Base Station (BS)", "radio 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", "component carrier", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0239] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0240] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0241] A mobile station may also be referred to as 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 suitable terminology.

[0242] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may include 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.

[0243] Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may be read as a side channel.

[0244] Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0245] In the present disclosure, an operation performed by a base station may be performed by its upper node in some cases. It is clear that in a network including one or more network nodes having base stations, various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0246] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be reordered unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0247] Each aspect / embodiment described in the present disclosure may be implemented using any of a wide variety of standards, including 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) (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 The present invention may be applied to systems using 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other appropriate wireless communication methods, next-generation systems that are based on these, etc. Also, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0248] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0249] Any reference to an element using a designation such as "first," "second," etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.

[0250] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, and the like.

[0251] A "determining" may also be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.

[0252] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. That is, "determination" may be considered to be "deciding" to perform some action.

[0253] Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

[0254] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0255] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples.

[0256] In the present 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 "coupled" may also be interpreted in the same way as "different."

[0257] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0258] In this disclosure, where articles have been added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0259] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modified and altered forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the invention according to the present disclosure.

Claims

1. a receiver for receiving downlink control information (DCI) indicating one or more measurement reference signal (SRS) resource indicators (SRIs); When the DCI indicates one SRI, control is performed to transmit a physical uplink shared channel (PUSCH) using one transmission / reception point (TRP) based on a value of a specific number of lower-order bits among bits indicating a transmission precoding matrix indicator (TPMI), and control is performed to ignore values ​​of the remaining bits among bits indicating the TPMI; A terminal having a control unit that, when the DCI indicates multiple SRIs, controls to transmit a PUSH using multiple TRPs, and determines that the number of antenna ports of multiple SRS resources corresponding to the multiple SRIs is the same.

2. receiving downlink control information (DCI) indicating one or more measurement reference signal (SRS) resource indicators (SRIs); When the DCI indicates one SRI, control is performed to transmit a physical uplink shared channel (PUSCH) using one transmission / reception point (TRP) based on a value of a specific number of lower-order bits among bits indicating a transmission precoding matrix indicator (TPMI), and control is performed to ignore values ​​of the remaining bits among bits indicating the TPMI; A wireless communication method for a terminal, comprising the steps of: when the DCI indicates multiple SRIs, controlling to transmit a PUSH using multiple TRPs, and determining that the number of antenna ports of multiple SRS resources corresponding to the multiple SRIs is the same.

3. a transmitter for transmitting downlink control information (DCI) indicating one or more measurement reference signal (SRS) resource indicators (SRIs); If the DCI indicates one SRI, control to receive a physical uplink shared channel (PUSCH) transmission using one transmission / reception point (TRP) transmitted by the terminal based on a value of a specific number of lower-order bits among bits indicating a transmit precoding matrix indicator (TPMI), and determine that values ​​of the remaining bits among bits indicating the TPMI are ignored by the terminal; A base station having a control unit that, when the DCI indicates multiple SRIs, controls to receive a PUSH transmission using multiple TRPs transmitted by the terminal, and sets the number of antenna ports for multiple SRS resources corresponding to the multiple SRIs to be the same.

4. A system having a terminal and a base station, The terminal includes: a receiver for receiving downlink control information (DCI) indicating one or more measurement reference signal (SRS) resource indicators (SRIs); When the DCI indicates one SRI, control is performed to transmit a physical uplink shared channel (PUSCH) using one transmission / reception point (TRP) based on a value of a specific number of lower-order bits among bits indicating a transmission precoding matrix indicator (TPMI), and control is performed to ignore values ​​of the remaining bits among bits indicating the TPMI; A control unit that, when the DCI indicates a plurality of SRIs, controls to transmit a PUSCH using a plurality of TRPs and determines that the number of antenna ports of a plurality of SRS resources corresponding to the plurality of SRIs is the same; The base station, A system comprising a transmitter for transmitting the DCI.

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