Terminal, base station, system and wireless communication method

Abstract

A terminal involved in one embodiment of the present disclosure comprises: a control unit that uses at least one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, and Downlink Control Information (DCI) to determine uplink shared channel (Physical Uplink Shared Channel (PUSCH)) spatial relationship information for multiple transmission and reception points; and a transmission unit that repeatedly transmits the PUSCH using a spatial domain transmission filter based on the spatial relationship information. According to one embodiment of the present disclosure, the repeated transmission of PUSCH can be appropriately controlled.

Description

Technical Field

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

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

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

[0004] Prior art literature

[0005] Non-patent literature

[0006] 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

[0007] Problems to be solved by the invention

[0008] In 3GPP Rel.15, in the UL data channel (e.g., uplink shared channel (Physical Uplink Shared Channel (PUSCH))), repetitive transmission is supported. The UE controls so that the PUSCH is transmitted over multiple time slots (e.g., K consecutive time slots) based on the repetition factor K set from the network (e.g., base station). That is, in the case of repetitive transmission, each PUSCH is transmitted in a different time slot (e.g., time slot unit).

[0009] On the other hand, in Rel. 16 and later, when repeatedly transmitting PUSCH, a plurality of PUSCH transmissions are being studied in one slot. That is, each PUSCH is transmitted in a unit shorter than a slot (for example, a subslot unit or a minislot unit).

[0010] In addition, in NR, communication using one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi-TRP) is being studied.

[0011] However, in the NR specifications to date, there has been no sufficient research on how to control the repeated transmission of PUSCH in multiple panels / TRPs. If the repeated transmission of PUSCH in multiple TRPs is not performed properly, there is a concern that throughput will be reduced or communication quality will deteriorate.

[0012] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately control repeated transmission of a PUSCH.

[0013] Means for solving problems

[0014] A terminal involved in one method of the present disclosure comprises: a control unit, which uses at least one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling and Downlink Control Information (DCI) to determine spatial relationship information for an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) for multiple transmitting and receiving points; and a transmitting unit, which repeatedly transmits the PUSCH using a spatial domain transmitting filter based on the spatial relationship information.

[0015] Effects of the Invention

[0016] According to one method of the present disclosure, even when multiple TRPs are applied, it is possible to appropriately control the repeated transmission of PUSCH. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1A And 1B is a diagram showing an example of repeated transmission of PUSCH.

[0018] Figure 2A And 2B is a diagram showing an example of an invalid codeword pattern.

[0019] Figure 3A 3B is a diagram showing an example of nominal repetitions and actual repetitions.

[0020] Figure 4 This is a diagram showing an example of repeated transmission of PUSCH in multiple TRPs.

[0021] Figures 5A-5D It is a diagram showing an example of notification of spatial relationship information according to the first embodiment.

[0022] Figures 6A-6C It is a diagram showing an example of notification of spatial relationship information according to the second embodiment.

[0023] Figures 7A-7C It is a diagram showing an example of notification of spatial relationship information according to the third embodiment.

[0024] Figures 8A-8C It is a diagram showing an example of notification of spatial relationship information according to the fourth embodiment.

[0025] Figures 9A-9C It is a diagram showing an example of notification of spatial relationship information according to the fifth embodiment.

[0026] Figures 10A-10C It is a diagram showing an example of notification of spatial relationship information according to the sixth embodiment.

[0027] Figures 11A-11C It is a diagram showing an example of notification of spatial relationship information according to the seventh embodiment.

[0028] Fig.12 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0029] Fig.13 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0030] Fig.14 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0031] Fig.15 This is a diagram showing an example of the hardware configuration of a base station and a user terminal involved in one embodiment. DETAILED DESCRIPTION

[0032] (Repeatedly send)

[0033] In Rel.15, repeated transmission is supported in data transmission. For example, the base station (network (NW), gNB) only repeatedly transmits DL data (e.g., downlink shared channel (PDSCH)) a specific number of times. Alternatively, the UE only repeatedly transmits UL data (e.g., uplink shared channel (PUSCH)) a specific number of times.

[0034] Figure 1A FIG. 1 is a diagram showing an example of repeated transmission of PUSCH. Figure 1A , an example is shown in which a specific number of repeated PUSCHs are scheduled by a single DCI. The number of repetitions is also called a repetition factor (repetition factor) K or an aggregation factor (aggregation factor) K.

[0035] exist Figure 1A In , the repetition coefficient K=4, but the value of K is not limited to this. In addition, the nth repetition is also called the nth transmission occasion, etc., and can also be identified by the repetition index k (0≤k≤K-1). In addition, Figure 1A , the repeated transmission of a PUSCH dynamically scheduled by DCI (for example, a PUSCH based on a dynamic grant) is shown, but it can also be applied to the repeated transmission of a PUSCH based on a set grant.

[0036] For example, in Figure 1A In the embodiment, the UE semi-statically receives information indicating the iteration coefficient K (e.g., aggregationFactorUL or aggregationFactorDL) through high-layer signaling. Here, the high-layer signaling may be, for example, any one of RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information, etc., or a combination thereof.

[0037] MAC signaling may use, for example, MAC control elements (MAC CE (Control Element)), MAC PDU (Protocol Data Unit), etc. Broadcast information may also be, for example, a master information block (MIB: Master Information Block), a system information block (SIB: System Information Block), minimum system information (RMSI: Remaining Minimum System Information), etc.

[0038] The UE controls the reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) of the PDSCH or the transmission processing (e.g., at least one of transmission, mapping, modulation, and encoding) of the PUSCH in K consecutive time slots based on at least one of the following field values ​​(or information represented by the field value) in the DCI:

[0039] Allocation of time domain resources (e.g., starting symbol, number of symbols in each time slot, etc.),

[0040] Allocation of frequency domain resources (e.g., a specific number of resource blocks (RBs), a specific number of resource block groups (RBGs)),

[0041] Modulation and Coding Scheme (MCS) index,

[0042] · The structure (setting, configuration) of the demodulation reference signal (DMRS: Demodulation Reference Signal) of PUSCH,

[0043] · The spatial relation information (spatial relation info) of the PUSCH, or the state (TCI state (TCI-state)) of the transmission configuration indication (TCI: Transmission Configuration Indication or Transmission Configuration Indicator).

[0044] The same symbol allocation can also be applied between consecutive K time slots. Figure 1A, the case where the PUSCH in each slot is allocated to a specific number of symbols from the beginning of the slot is shown. The allocation of the same symbols between slots can also be determined as described in the above-mentioned time domain resource allocation.

[0045] For example, the UE may also determine the allocation of symbols in each time slot based on the starting symbol S and the number of symbols L (e.g., Start and Length Indicator (SLIV)) determined based on the value m of a specific field (e.g., TDRA field) in the DCI. In addition, the UE may also determine the initial time slot based on the K2 information determined based on the value m of a specific field (e.g., TDRA field) in the DCI.

[0046] On the other hand, between the consecutive K time slots, the redundancy version (RV) applied in the TB based on the same data may be the same, or may be at least partially different. For example, the RV applied in the TB in the nth time slot (transmission opportunity, repetition) may also be determined based on the value of a specific field (e.g., RV field) in the DCI.

[0047] In the case where the communication direction of resources allocated in K consecutive time slots in at least one codeword is different from the UL, DL or flexible (Flexible) of each time slot specified by at least one of the uplink and downlink communication direction indication information for TDD control (for example, "TDD-UL-DL-ConfigCommon", "TDD-UL-DL-ConfigDedicated" of RRC IE) and the time slot format identifier (Slotformat indicator) of DCI (for example, DCI format 2_0), the resources of the time slot including the codeword may not be sent (or received).

[0048] In Rel.15, Figure 1A As shown, the PUSCH is repeatedly transmitted over multiple time slots (in time slot units), but in Rel.16 and later, it is assumed that the PUSCH is repeatedly transmitted in units shorter than the time slot (for example, sub-time slot units, mini-time slot units, or specific code number units) (refer to Figure 1B ).

[0049] exist Figure 1B In , the repetition coefficient K=4, but the value of K is not limited to this. In addition, the nth repetition is also called the nth transmission occasion, etc., and can also be identified by the repetition index k (0≤k≤K-1). In addition, Figure 1B, the repeated transmission of a PUSCH dynamically scheduled by DCI (for example, a PUSCH based on a dynamic grant) is shown, but it can also be applied to the repeated transmission of a PUSCH based on a set grant.

[0050] The UE may also determine the symbol allocation for PUSCH transmission (e.g., PUSCH with k=0) in a specific time slot based on the starting symbol S and the number of symbols L (e.g., StartSymbol and length) determined based on the value m of a specific field (e.g., TDRA field) in the DCI of the PUSCH. In addition, the UE may also determine the specific time slot based on the Ks information determined based on the value m of a specific field (e.g., TDRA field) in the DCI of the PUSCH.

[0051] The UE may also dynamically receive information indicating the repetition coefficient K (e.g., number of repetitions) through downlink control information. The repetition coefficient may also be determined based on the value m of a specific field (e.g., TDRA field) in the DCI. For example, a table may be supported in which the correspondence between the bit value notified through the DCI, the repetition coefficient K, the start symbol S, and the number of symbols L is defined.

[0052] Figure 1A The slot-based repetition transmission shown may also be referred to as repetition transmission type A (eg, PUSCH repetition type A). Figure 1B The sub-slot based repetition transmission shown may also be referred to as repetition transmission Type B (eg, PUSCH repetition Type B).

[0053] The UE may be configured to apply at least one of the repetition transmission type A and the repetition transmission type B. For example, the repetition transmission type applied by the UE may be notified from the base station to the UE through higher layer signaling (eg, PUSCH RepTypeIndicator).

[0054] For each DCI format that schedules the PUSCH, either the repetitive transmission type A or the repetitive transmission type B may be configured for the UE.

[0055] For example, for the first DCI format (e.g., DCI format 0_1), when the higher layer signaling (e.g., PUSCH RepTypeIndicator-A or DCIFormat0_1) is set to repetition transmission type B (e.g., PUSCH-RepTypeB), the UE applies repetition transmission type B to PUSCH repetition transmission scheduled by the first DCI format. In other cases (e.g., when PUSCH-RepTypeB is not set or when PUSCH-RepTypA is set), the UE applies repetition transmission type A to PUSCH repetition transmission scheduled by the first DCI format.

[0056] (Invalid code mode)

[0057] It is also under study to notify the UE of information related to symbols (or symbol patterns) that cannot be used for PUSCH transmission when repeated transmission type B is applied to PUSCH transmission. The symbol pattern that cannot be used for PUSCH transmission may also be referred to as invalid symbol pattern, invalid symbol pattern, invalid symbol pattern, etc.

[0058] The use of at least one of higher layer signaling and DCI to notify the invalid symbol pattern is under study. The DCI may also be a specific DCI format (eg, at least one of DCI formats 0_1 and 0_2).

[0059] For example, the first higher layer parameter is used to notify the UE of information related to the invalid symbol pattern that cannot be used for PUSCH transmission. In addition, the UE may also be notified of the application of the information related to the invalid symbol pattern using DCI. In this case, a bit field for indicating the application of information related to the invalid symbol pattern (a notification field for the application of the invalid symbol pattern) may also be set in the DCI.

[0060] In addition, the second high-level parameter may be used to notify the UE of the configuration of the notification field (or, additional bit) in the DCI. That is, when the information related to the invalid symbol pattern is notified through the first high-level parameter, the UE may also determine whether to apply the information related to the invalid symbol pattern based on the second high-level parameter and the DCI.

[0061] When the first high-level parameter is not notified or set, the UE may also control the transmission of the PUSCH without considering the invalid symbol pattern. When the first high-level parameter is notified or set, the UE may also determine whether the invalid symbol pattern is applied based on the second high-level parameter and the DCI. For example, when the addition of an additional bit (or a specific field) indicating whether the invalid symbol pattern is applied in the DCI is indicated by the second high-level parameter, the UE may also determine whether the invalid symbol pattern is applied based on the specific field.

[0062] The first high-layer parameter may be information notifying a symbol pattern that becomes invalid in PUSCH transmission, and may be in the form of a bitmap, for example (see Figure 2A ).exist Figure 2A , is a diagram showing an example of a case where an invalid symbol pattern is defined by a bitmap (1-D bitmap) for the time domain. The UE may also determine the resources available for PUSCH transmission in one or more frequency bandwidths (e.g., BWP) based on information related to the invalid symbol pattern (see Figure 2B ).

[0063] Here, a case where one or a common invalid symbol pattern is applied to a plurality of BWPs is shown, but a different invalid symbol pattern may be set or applied to each BWP.

[0064] (Nominal repetitions / Actual repetitions)

[0065] When repetition transmission type B is applied and repetition transmission is performed in sub-slot units, a certain repetition transmission may cross a slot boundary due to differences in the repetition coefficient (K) and the data allocation unit.

[0066] Figure 3A An example of applying repetition transmission type B when the repetition coefficient (K) is 4 and the PUSCH length (L) is 4 is shown. Figure 3A In this case, the PUSCH with k=3 is configured across the time slot boundary. In this case, the PUSCH may also be divided (or segmented) based on the time slot boundary and transmitted (refer to Figure 3B ).

[0067] In addition, it is also assumed that a time slot contains symbols that cannot be used for PUSCH transmission (for example, DL symbols or invalid symbols). Figure 3A, a case where a part of the symbols configured for the PUSCH with k=1 includes symbols (here, DL symbols) that cannot be used for the PUSCH transmission is shown. In this case, symbols other than the DL symbols may also be used for PUSCH transmission (see Figure 3B ).

[0068] When symbols other than both ends of the allocated symbols of a certain PUSCH include DL symbols (or invalid symbols), PUSCH transmission may be performed using symbols other than the DL symbol portion. In this case, the PUSCH may be divided (or segmented).

[0069] exist Figure 3B , it is shown that in the subslot-based repeated transmission, the PUSCH with k=1 (Rep#2) is divided into two (Rep#2-1 and #2-2) by DL codewords, and the PUSCH with k=3 (Rep#4) is divided into two (Rep#4-1 and #4-2) by the time slot boundary.

[0070] In addition, consider the DL symbol, invalid symbol, or repeated transmission before the time slot boundary ( Figure 3A ) can also be called nominal repetitions. It takes into account the repetition of DL symbols, invalid symbols, or time slot boundaries ( Figure 3B ) can also be called actual repetitions.

[0071] (Spatial relationship between SRS and PUSCH)

[0072] In Rel.15NR, the UE can also receive information (SRS setting information, such as parameters in the "SRS-Config" of the RRC control element) used in the transmission of a measurement reference signal (e.g., a sounding reference signal (SRS)).

[0073] Specifically, the UE may also receive at least one of information related to one or more SRS resource sets (SRS resource set information, such as "SRS-ResourceSet" of the RRC control element) and information related to one or more SRS resources (SRS resource information, such as "SRS-Resource" of the RRC control element).

[0074] An SRS resource set may also be associated with a specific number of SRS resources (or the specific number of SRS resources may be grouped). Each SRS resource may also be identified by an SRS resource identifier (SRS Resource Indicator (SRI)) or an SRS resource ID (Identifier).

[0075] The SRS resource set information may also include: SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, SRS resource type (for example, any one of periodic SRS (PeriodicSRS), semi-persistent SRS (Semi-Persistent SRS), aperiodic CSI (Aperiodic SRS)), and information on the usage of SRS.

[0076] Here, the SRS resource type may also represent any one of periodic SRS (Periodic SRS (P-SRS)), semi-persistent SRS (Semi-Persistent SRS (SP-SRS)), and aperiodic CSI (Aperiodic SRS (A-SRS)). In addition, the UE may also periodically (or periodically after activation) send P-SRS and SP-SRS, and send A-SRS based on the SRS request of the DCI.

[0077] In addition, the usage (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") may be, for example, beam management (beamManagement), codebook (codebook (CB)), noncodebook (noncodebook (NCB)), antenna switching, etc. SRS for codebook or non-codebook purposes may also be used to determine the precoder for codebook-based or non-codebook-based PUSCH transmission based on SRI.

[0078] For example, in the case of codebook-based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI, Transmitted Rank Indicator (TRI) and Transmitted Precoding Matrix Indicator (TPMI). In the case of non-codebook-based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI.

[0079] SRS resource information may also include SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, sending comb, SRS resource mapping (for example, time and / or frequency resource location, resource offset, resource period, number of repetitions, number of SRS code elements, SRS bandwidth, etc.), hopping association information, SRS resource type, sequence ID, SRS spatial relationship information, etc.

[0080] The spatial relationship information of SRS (for example, "spatialRelationInfo" of RRC information element) may also indicate the spatial relationship information between a specific reference signal and SRS. The specific reference signal may also be at least one of a synchronization signal / broadcast channel (Synchronization Signal / Physical Broadcast Channel (SS / PBCH)) block, a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and an SRS (for example, other SRS). The SS / PBCH block may also be referred to as a synchronization signal block (SSB).

[0081] The spatial relationship information of SRS may also include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID as an index of the above-mentioned specific reference signal.

[0082] In addition, in the present disclosure, the SSB index, SSB resource ID, and SSB resource indicator (SSBRI) may also be replaced with each other. In addition, the CSI-RS index, CSI-RS resource ID, and CSI-RS resource indicator (CSI-RS Resource Indicator (CRI)) may also be replaced with each other. In addition, the SRS index, SRS resource ID, and SRI may also be replaced with each other.

[0083] The spatial relationship information of SRS may also include a serving cell index, a BWP index (BWP ID), etc. corresponding to the above-mentioned specific reference signal.

[0084] When spatial relationship information is set for a certain SRS resource, where the spatial relationship information is related to SSB or CSI-RS and SRS, the UE may also use the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter (spatial domain receive filter) used for receiving the SSB or CSI-RS to transmit the SRS resource. In this case, the UE may also assume that the UE receive beam of the SSB or CSI-RS is the same as the UE transmit beam of the SRS.

[0085] When the UE is set with spatial relationship information related to other SRS (reference SRS) and the SRS (target SRS) for a certain SRS (target SRS) resource, the UE may also use the same spatial domain filter (spatial domain transmission filter) as the spatial domain filter (spatial domain transmission filter) used for transmitting the reference SRS to transmit the target SRS resource. That is, in this case, the UE may also assume that the UE transmission beam of the reference SRS is the same as the UE transmission beam of the target SRS.

[0086] The UE may also determine the spatial relationship of the PUSCH scheduled by the DCI based on the value of a specific field (e.g., SRS resource identifier (SRI) field) in the DCI (e.g., DCI format 0_1). Specifically, the UE may also use the spatial relationship information of the SRS resource determined based on the value of the specific field (e.g., SRI) (e.g., "spatialRelationInfo" of the RRC information element) for PUSCH transmission.

[0087] For PUSCH, when codebook-based transmission is used, the UE may also be configured with two SRS resources for each SRS resource set through RRC, and one of the two SRS resources may be indicated through DCI (1-bit SRI field). For PUSCH, when non-codebook-based transmission is used, the UE may also be configured with four SRS resources for each SRS resource set through RRC, and one of the four SRS resources may be indicated through DCI (2-bit SRI field).

[0088] (Multiple TRP)

[0089] In NR, one or more transmission / reception points (TRPs) (multi-TRPs) are being studied to use one or more panels (multi-panels) to perform DL transmissions to the UE. In addition, the UE is being studied to perform UL transmissions to one or more TRPs (refer to Figure 4 ).

[0090] Multiple TRPs may correspond to the same cell identifier (cell identifier (ID)) or different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

[0091] However, in the NR specifications to date, how to control the repeated transmission of PUSCH in multiple panels / TRPs has not been fully studied. If the repeated transmission of PUSCH in multiple TRPs is not properly performed, there is a concern that throughput will be reduced or communication quality will deteriorate.

[0092] Therefore, the inventors of the present invention have come up with a control method for repeated transmission of PUSCH. According to one method of the present disclosure, for example, the UE can use different beams for each repetition unit (e.g., segment, sub-time slot) to perform repeated transmission of PUSCH for multiple TRPs.

[0093] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the embodiments may be applied individually or in combination.

[0094] In addition, in the present disclosure, the panel, uplink (UL) transmission entity, TRP, spatial relationship, control resource set (COntrol REsource SET (CORESET)), PDSCH, codeword, base station, specific antenna port (e.g., demodulation reference signal (DeModulation Reference Signal (DMRS)) port), specific antenna port group (e.g., DMRS port group), specific group (e.g., code division multiplexing (Code Division Multiplexing (CDM)) group, specific reference signal group, CORESET group), and CORESET pool can also be replaced with each other. In addition, the panel identifier (Identifier (ID)) and the panel can also be replaced with each other. TRP ID and TRP can also be replaced with each other.

[0095] In the present disclosure, index, ID, indicator, and resource ID may also be replaced with each other.

[0096] In the present disclosure, “A / B” may also mean “at least one of A and B”.

[0097] In the present disclosure, list, group, cluster, subset, etc. may also be replaced with each other. In the present disclosure, spatial relationship information, SRI, SRS resource, precoder, etc. may also be replaced with each other.

[0098] The PUSCH spanning multiple TRPs in the following implementation manner can also be replaced by repeated PUSCH spanning multiple TRPs, abbreviated as repeated PUSCH, repeated transmission, etc.

[0099] In addition, the SRS resource set in the following embodiments may be replaced by an SRS resource set for a codebook or non-codebook purpose, or may be replaced by an SRS resource set for other purposes.

[0100] (Wireless Communication Method)

[0101] <First embodiment>

[0102] In the first embodiment, the UE may also be notified of the spatial relationship information of the PUSCH spanning multiple TRPs through a combination of RRC signaling, MAC CE, and DCI.

[0103] Figures 5A-5D FIG. 1 is a diagram showing an example of notification of spatial relationship information according to the first embodiment. Figures 5A-5D Provide explanation.

[0104] In the first embodiment, the UE may also be configured with a specific number (e.g., M) of SRS resource lists associated with one SRS resource set through RRC signaling. Here, the specific number M may be, for example, 8, 64, etc., or may be greater than 64. In an SRS resource set for a specific purpose (e.g., codebook or non-codebook), one or more SRS resource lists may also be configured.

[0105] One SRS resource list may be associated with a maximum of R SRS resources. Here, R may also correspond to the maximum number of TRPs for PUSCH.

[0106] Figure 5A This shows an example in which a plurality of SRS resource lists (SRS resource lists #0, #1, ...) are set in association with an SRS resource set. SRS resource list #0 is associated with SRS resource #0. SRS resource list #1 is associated with {SRS resources #0, #1}.

[0107] In the first embodiment, when multiple SRS resource lists are set for the UE, further, MACCE is used to activate one or more SRS resource lists (a subset of the SRS resource lists). The maximum number of activated SRS resource lists may also be limited to a specific number (eg, 2, 4, 8, etc.).

[0108] Figure 5B It is a diagram showing an example of the SRS resource list activation / deactivation MAC CE involved in the first embodiment. Figure 5BThe bit string constituting the MAC CE is shown. The MAC CE may also include information such as the cell ID (of the SRS resource set) of the application object (the "Serving Cell ID" field), the BWP ID (of the SRS resource set) (the "BWP ID" field), etc. The "R" field may also mean a reserved bit for future expansion. Unless otherwise specified, the same is true for the drawings of other subsequent MAC CEs.

[0109] In addition, the MAC CE contains "S i ”(i=0、1、2、…) field. i If the field indicates 1, the UE activates SRS resource list #i. i When the field indicates 0, the UE deactivates SRS resource list #i.

[0110] In the first embodiment, a DCI field may also be used to indicate one or more SRS resource lists in the activated SRS resource list to the UE. In addition, the field may be an existing DCI field (e.g., an SRI field), a new DCI field (e.g., an SRS resource list field for repeated transmission), or may be represented by a combination of multiple fields.

[0111] For a UE configured with codebook-based PUSCH transmission or single-layer non-codebook-based PUSCH transmission, it can also be assumed that one SRS resource list is indicated for PUSCH transmission across multiple TRPs.

[0112] Figure 5C This is a diagram showing an example of the correspondence between DCI fields for specifying one SRS resource list according to the first embodiment. In this example, the value of a certain field contained in the DCI ("Bitfield mapped to index") and the corresponding activated SRS resource list are shown. The number of bits of this field can also be determined based on the maximum number of activated SRS resource lists.

[0113] exist Figure 5C In the MAC CE, different SRS resource lists are specified according to the value of the field. The UE can also assume that the SRS resource list #i activated by the above MAC CE corresponds to the value of each field in ascending or descending order. That is, when the SRS resource list ID to be activated and the value of the field are arranged in ascending or descending order, it can also be assumed that they correspond one to one from small to large.

[0114] For example, when assuming Figure 5BWhen S1=S0=1 is notified in the MAC CE, it can also be Figure 5C The first SRS resource list in is SRS resource list #0, the second SRS resource list is SRS resource list #1, ..., and so on. In this way, the activated SRS resource list corresponding to the value of each field is determined.

[0115] A UE configured with multi-layer non-codebook based PUSCH transmission can also be assumed that multiple SRS resource lists corresponding to the spatial relationship information of each layer are indicated for PUSCH transmission across multiple TRPs.

[0116] Figure 5D FIG. 1 is a diagram showing an example of a DCI field for specifying a plurality of SRS resource lists according to the first embodiment. In this example, the DCI field includes a bit field for layer #0 ("Bit field for layer #0"), a bit field for layer #1 ("Bit field for layer #1"), etc. The UE may also communicate with Figure 5C The SRS resource list corresponding to the value of each bit field is determined in the same manner as described above.

[0117] According to the first embodiment described above, the SRS resource list specified by DCI can be dynamically changed using MAC CE to implement PUSCH repetition transmission. For example, control to use different SRS resources can be implemented for each PUSCH resource and for each PUSCH repetition.

[0118] <Second embodiment>

[0119] In the second embodiment, the UE is notified of the spatial relationship information of the PUSCH spanning multiple TRPs through a combination of RRC signaling and DCI.

[0120] Figures 6A-6C FIG. 1 is a diagram showing an example of notification of spatial relationship information according to the second embodiment. Figures 6A-6C Points not particularly described may be the same as those of the first embodiment.

[0121] In the second embodiment, the UE may be configured with a specific number (eg, M) of SRS resource lists associated with one SRS resource set through RRC signaling. Fig. 6A and Figure 5A same.

[0122] In the second embodiment, one or more SRS resource lists among the SRS resource lists configured by RRC may be specified to the UE using a field of DCI.

[0123] Figure 6B This is a diagram showing an example of the correspondence relationship of the DCI field for specifying one SRS resource list involved in the second embodiment. In this example, the value of a certain field included in the DCI ("Bitfield mapped to index") and the SRS resource list set by the corresponding RRC are shown. The number of bits of this field can also be determined based on the maximum number of SRS resource lists set.

[0124] Figure 6C is a diagram showing an example of a DCI field for specifying a plurality of SRS resource lists according to the second embodiment. Figure 5D Same as, but in each bit field Figure 6B This is different.

[0125] According to the second embodiment described above, it is possible to appropriately perform PUSCH repetitive transmission based on the SRS resource list specified by DCI in the SRS resource list configured by RRC.

[0126] <Third embodiment>

[0127] In the third embodiment, the UE is notified of the spatial relationship information of the PUSCH spanning multiple TRPs through a combination of RRC signaling and MAC CE.

[0128] Figures 7A-7C FIG. 1 is a diagram showing an example of notification of spatial relationship information according to the third embodiment. Figures 7A-7C Points not particularly described may be the same as those of the first embodiment.

[0129] In the third embodiment, a specific number (eg, M) of SRS resource lists may also be configured for the UE through RRC signaling. Fig. 7A and Figure 5A same.

[0130] In the third embodiment, when multiple SRS resource lists are configured for the UE, MAC CE is further used to activate (or indicate) one or more SRS resource lists.

[0131] Figure 7B It is a diagram showing an example of the SRS resource list activation / deactivation MAC CE involved in the second embodiment. Figure 7B and Figure 5B Same. In addition, Figure 7BThe MAC CE of the MAC CE may also be notified to the UE configured with codebook-based PUSCH transmission or single-layer non-codebook-based PUSCH transmission. The UE may also be considered as: i " field, only 1 means 1.

[0132] Figure 7C It is a diagram showing another example of the SRS resource list activation / deactivation MAC CE involved in the second embodiment. Figure 7C and Figure 7B Similar, but the points that can be specified by the SRS resource list ID of each layer are different. For example, the first layer ID ("1st Layer ID") field can also represent the layer ID (e.g., 0-3), and the first SRS resource list ID ("1st SRSresource list ID") field can also be used to identify the SRS resource list corresponding to the layer of the first layer ID.

[0133] In this example, each layer ID field is represented by 2 bits and each SRS resource list ID field is represented by 6 bits, but the number of bits is not limited to this. Figure 7C The MAC CE may also be notified to the UE for which multi-layer non-codebook based PUSCH transmission is configured.

[0134] In the third embodiment, the spatial relationship information for PUSCH is determined based on the SRS resource list activated by the MAC CE. Figure 7C The spatial relationship information is determined by using a list of multiple SRS resources corresponding to the spatial relationship information of each layer specified by the MAC CE. Therefore, the spatial relationship information may not be identified through DCI. In this case, the SRI field of the DCI may also be reduced or used for other purposes.

[0135] According to the third embodiment described above, it is possible to appropriately perform PUSCH repetitive transmission based on the SRS resource list designated by the MAC CE in the SRS resource list configured by the RRC.

[0136] <Fourth embodiment>

[0137] In the fourth embodiment, the UE is notified of the spatial relationship information of the PUSCH spanning multiple TRPs through a combination of MAC CE and DCI.

[0138] Figures 8A-8C FIG. 4 is a diagram showing an example of notification of spatial relationship information according to the fourth embodiment. Figures 8A-8C Points not particularly described may be the same as those of the first embodiment.

[0139] In the fourth embodiment, it is assumed that a specific number (e.g., M) of SRS resources associated with one SRS resource set is set to the UE through RRC signaling. If M=2, it is equivalent to an SRS resource set for codebook-based transmission of Rel.15NR, and if M=4, it is equivalent to an SRS resource set for non-codebook-based transmission of Rel.15NR.

[0140] Fig. 8A An example is shown in which a plurality of SRS resources (SRS resources #0, #1, ...) are set in association with an SRS resource set.

[0141] In the fourth embodiment, the UE may also be activated (or instructed) by a specific number (e.g., N) of SRI sequences through the MAC CE. Here, the SRI sequence may also be a combination (set) of SRS resources from 1 to a maximum of R, and may also be referred to as an SRI group, an SRI group, etc. Here, R may also correspond to the maximum number of TRPs for PUSCH.

[0142] As the MAC CE, a MAC CE obtained by associating the SRI sequence ID with the MAC CE described in the fifth embodiment below may be used.

[0143] In the fourth embodiment, one or more SRI sequences among the activated SRI sequences may also be indicated to the UE using a field of the DCI.

[0144] Figure 8B This is a diagram showing an example of the correspondence between DCI fields for specifying one SRI sequence according to the fourth embodiment. In this example, the value of a certain field included in the DCI ("Bit field mapped to index") and the corresponding activated SRI sequence are shown. The number of bits of the field can also be determined based on the maximum number of SRI sequences that can be activated.

[0145] For example, the first SRI sequence may also include SRS resource # 0. The second SRI sequence may also include {SRS resources # 0, # 1}.

[0146] Figure 8C is a diagram showing an example of a DCI field for specifying a plurality of SRI sequences according to the second embodiment. Figure 5D Same as, but in each bit field Figure 8B The corresponding point is different.

[0147] In addition, when M=1 or the number of activated SRI sequences is 1, the UE may also assume that the DCI field for specifying the SRI sequence is 0 bits.

[0148] According to the fourth embodiment described above, it is possible to appropriately perform PUSCH repetitive transmission based on the SRI sequence specified by the DCI among the SRI sequences activated by the MAC CE.

[0149] <Fifth embodiment>

[0150] In the fifth embodiment, the UE is notified of the spatial relationship information of the PUSCH spanning multiple TRPs via the MAC CE.

[0151] Figures 9A-9C FIG. 1 is a diagram showing an example of notification of spatial relationship information according to the fifth embodiment. Figures 9A-9C Points not particularly described may be the same as those of the first embodiment.

[0152] In the fifth embodiment, it is assumed that a specific number (for example, M) of SRS resources associated with one SRS resource set is set to the UE through RRC signaling. Fig. 9A and Fig. 8A same.

[0153] In the fifth embodiment, the UE may also be activated (or instructed) by MAC CE to have 1 or a maximum of a specific number (eg, N) of SRI sequences activated.

[0154] Fig. 9B It is a diagram showing an example of an SRI sequence (or SRS resource) activation / deactivation MAC CE involved in the fifth embodiment. Fig. 9B and Figure 5B Same, but in "S i The " field is not a list of SRS resources, but it indicates SRS resources. The UE can also assume that "S i "One or more of the fields represent 1.

[0155] For example, in the expression S1=S0=1 Fig. 9B When the MAC CE is notified, the UE can also determine that the SRI sequence contains {SRS resources #0, #1}.

[0156] Fig. 9C This is a diagram showing another example of the SRI sequence (or SRS resource) activation / deactivation MAC CE involved in the fifth embodiment. Fig. 9C and Figure 7C Similar, but in the field "Sk，i " instead of the SRS resource list ID field. This is different.

[0157] For example, in the expression S 1、1 =S 1、0 =S 2、2 =S 2、1 =1 Fig. 9C When the MAC CE is notified, the UE can also determine that the SRI sequence corresponding to the first layer ID includes {SRS resources #0, #1}, and the SRI sequence corresponding to the second layer ID includes {SRS resources #1, #2}.

[0158] According to the fifth embodiment described above, it is possible to appropriately perform PUSCH repetitive transmission based on the SRI sequence specified by the MAC CE.

[0159] <Sixth embodiment>

[0160] In the sixth embodiment, the UE is notified of the spatial relationship information of the PUSCH spanning multiple TRPs via DCI.

[0161] Figures 10A-10C FIG. 1 is a diagram showing an example of notification of spatial relationship information according to the sixth embodiment. Figures 10A-10C Points not particularly described may be the same as those of the first embodiment.

[0162] In the sixth embodiment, it is assumed that a specific number (for example, M) of SRS resources associated with one SRS resource set is set to the UE through RRC signaling. Fig. 10A and Fig. 8A same.

[0163] In the sixth embodiment, the UE is indicated one or a maximum of a specific number (eg, N) of SRI sequences through a field of the DCI.

[0164] Fig. 10B This is a diagram showing an example of the correspondence relationship of the DCI field for specifying one SRI sequence involved in the sixth embodiment. In this example, the value of a certain field included in the DCI ("Bitfield mapped to index") and the corresponding SRI sequence are shown.

[0165] For example, the first SRI sequence may include SRS resource #0. The second SRI sequence may include {SRS resources #0, #1}. Each SRI sequence may also be predefined by the specification.

[0166] Fig. 10Cis a diagram showing an example of a DCI field for specifying a plurality of SRI sequences according to the sixth embodiment. Figure 5D Same as, but in each bit field Fig. 10B The corresponding point is different.

[0167] According to the sixth embodiment described above, it is possible to appropriately perform PUSCH repetitive transmission based on the SRI sequence specified by DCI.

[0168] <Seventh embodiment>

[0169] In the seventh embodiment, a TCI state may be used as (or instead of) spatial relationship information for PUSCH across multiple TRPs. The TCI state may also be equivalent to at least one of a downlink TCI state (DL TCI state), an uplink TCI state (UL TCI state), and a unified TCI state. In addition, the UL TCI state may also be replaced by spatial relationship information (spatialrelationinfo).

[0170] Here, the unified TCI state may also mean a TCI state commonly used in both DL and UL.

[0171] In the seventh embodiment, the UE can also determine the spatial relationship information of the PUSCH spanning multiple TRPs based on the content after replacing the spatial relationship information, SRS resources, SRI, etc. in at least one of the above-mentioned first to sixth embodiments with TCI status information, TCI status, TCI status ID, etc.

[0172] The above-mentioned TCI state may be set separately from the setting of the SRS resource set, the setting of the SRS resource, etc. (for example, it may be set through the PUSCH setting information (PUSCH-Config)).

[0173] For example, the UE may also be configured with a list of TCI states (eg, UL TCI states) for PUSCH through RRC signaling.

[0174] The UE may also be activated (or instructed) by a specific number (e.g., N) of TCI state sets through the MAC CE. Here, the TCI state set may also be a combination (set) of TCI states from 1 to a maximum of R, and may also be referred to as a group of TCI states, a TCI state group, etc. Here, R may also be equivalent to the maximum number of TRPs for PUSCH.

[0175] The UE may also determine the TCI state set used in the precoder for the PUSCH based on the DCI. The TCI state set may also correspond to at least one of the TCI state set configured by the RRC, the TCI state set activated by the MAC CE, the TCI state set predefined by the specification, and the like.

[0176] Figures 11A-11C It is a diagram showing an example of notification of spatial relationship information according to the seventh embodiment. Fig.11A And 11B corresponds to an RRC information element described using ASN.1 (Abstract Syntax Notation One) notation.

[0177] like Fig.11A As shown, the PUSCH configuration information (PUSCH-Config) may also include a list of spatial relationship information for PUSCH (SpatialrelationinfoToAddModList). Each Spatialrelationinfo-r17 included in the list may mean new spatial relationship information after Rel.17, for example, or existing spatial relationship information. The spatial relationship information may also be associated with a spatial relationship information ID (SpatialrelationinfoId).

[0178] like Fig. 11B As shown, the PUSCH configuration information (PUSCH-Config) may also include a list of unified TCI states for PUSCH (utci-StatesToAddModList). Each uTCI-State included in the list may also mean an individual unified TCI state. The unified TCI state may also be associated with a unified TCI state ID (uTCI-StateId).

[0179] Fig. 11C This is a diagram showing an example of the correspondence relationship of the DCI fields for specifying one TCI state set (spatial relationship information set) involved in the seventh embodiment. Fig.11A The list of spatial relationship information is set by the UE and can also be based on the DCI field and Fig. 11C The corresponding relationship is indicated by the TCI state set.

[0180] exist Fig. 11CIn the DCI, the code point (the value of a certain field) and the corresponding set of spatial relationship states are shown. For example, code point = 000 corresponds to spatial relationship information #0 (Spatialrelationinfo#0), code point = 001 corresponds to spatial relationship information #1 (Spatialrelationinfo#1), and code point = 010 corresponds to spatial relationship information #0 and #1 (Spatialrelationinfo#0 and #1).

[0181] According to the seventh embodiment described above, it is possible to appropriately implement PUSCH repetitive transmission based on the TCI state that can be used for UL.

[0182] <Other>

[0183] In each of the above-mentioned embodiments, a UE that is assigned one SRS resource (or an SRS resource list including one SRS resource) for PUSCH repetitive transmission may also transmit the repetitive transmission based on the SRS resource. In addition, repetitive transmission based on SRS resources may also mean repetitive transmission based on a spatial relationship determined based on the SRS resources (for example, using a spatial domain transmission filter based on the spatial relationship).

[0184] In the above-mentioned embodiments, a UE to which multiple SRS resources (or an SRS resource list including multiple SRS resources) are assigned for repeated PUSCH transmission may send part of the repeated transmission based on part of these SRS resources and send the rest of the repeated transmission based on the remaining resources.

[0185] In addition, the DCI (or field of DCI) in each of the above-mentioned embodiments may also be replaced by an implicit notification using DCI. The implicit notification using DCI may also include: (detected) DCI (or corresponding to the DCI or used in reception), time resources, frequency resources, control channel element (Control Channel Element (CCE)) index, physical resource block (Physical Resource Block (PRB)) index, resource element (ResourceElement (RE)) index, search space index, control resource set (Control Resource Set (CORESET)) index, and at least one of the aggregation level.

[0186] The UE may also apply the same implementations in the first to seventh implementations to codebook-based transmission and non-codebook-based transmission. The UE may also apply different implementations in the first to seventh implementations to codebook-based transmission and non-codebook-based transmission.

[0187] The UE may also switch to use multiple embodiments from the first embodiment to the seventh embodiment described above. For example, the first, third, fourth or fifth embodiment using MAC CE may also be applied when the UE receives a MAC CE configured through RRC (for example, a MAC CE-based control configured for repeated PUSCH transmission) or a new MAC CE (for example, the MAC CE shown in the first embodiment). In this case, non-MAC CE-based control (the second or sixth embodiment) may also be applied.

[0188] In addition, the above-mentioned embodiments can be applied when multiple TRPs or multiple panels (operations) are set to the UE, or when they are not.

[0189] (Wireless Communication System)

[0190] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0191] Fig.12 1 is a diagram showing an example of a schematic structure of a wireless communication system involved in one embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), and the like.

[0192] In addition, the wireless communication system 1 can also support dual connectivity between multiple radio access technologies (Radio Access Technology) (RAT) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA))) and NR (E-UTRA-NR Dual Connectivity (E-UTRA-NR Dual Connectivity (EN-DC))), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC))), etc.

[0193] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0194] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0195] The wireless communication system 1 may also include: a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.

[0196] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0197] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (lower than 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (higher than 24 GHz (above-24 GHz)). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to this. For example, FR1 may also correspond to a frequency band higher than FR2.

[0198] 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).

[0199] Multiple base stations 10 may also be connected by wire (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station may also be referred to as an IAB node.

[0200] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0201] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0202] In the wireless communication system 1, a wireless access method 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.

[0203] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be applied to the UL and DL radio access schemes.

[0204] In the wireless communication system 1, as downlink channels, 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)) and the like may be used.

[0205] In addition, in the wireless communication system 1, as uplink channels, 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)) and the like may be used.

[0206] The PDSCH is used to transmit user data, high-layer control information, system information block (SIB), etc. The PUSCH is also used to transmit user data, high-layer control information, etc. In addition, the PBCH is also used to transmit the master information block (MIB).

[0207] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0208] In addition, the DCI for scheduling PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, PDSCH may also be replaced by DL data, and PUSCH may also be replaced by UL data.

[0209] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. One CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a certain search space based on the search space setting.

[0210] A search space may also correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be interchangeable.

[0211] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also called hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (Scheduling Request (SR)) can also be transmitted through PUCCH. Random access preamble code for establishing connection with a cell can also be transmitted through PRACH.

[0212] In the present disclosure, downlink, uplink, etc. may be expressed without "link". In addition, various channels may be expressed without "Physical" at the beginning.

[0213] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, as DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may also be transmitted.

[0214] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as an SS / PBCH block, SS block (SS Block (SSB)), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0215] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0216] (Base Station)

[0217] Fig.13 1 is a diagram showing an example of a structure of a base station involved in one embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission path interface 140 may each be provided with more than one.

[0218] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and the base station 10 may also be assumed to have other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0219] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which the present disclosure relates.

[0220] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be sent as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting, release, etc.) of communication channels, state management of the base station 10, management of wireless resources, etc.

[0221] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the public knowledge in the technical field involved in the present disclosure.

[0222] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured by a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0223] The transmitting / receiving antenna 130 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, for example, an array antenna.

[0224] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0225] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0226] The sending and receiving unit 120 (sending processing unit 1211), for example, may also perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110 to generate a bit string to be sent.

[0227] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0228] The transmitting and receiving unit 120 (RF unit 122 ) may perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0229] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0230] The sending and receiving unit 120 (receiving processing unit 1212) can also apply analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0231] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (Radio Resource Management (RRM)) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (ReceivedSignal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0232] The transmission path interface 140 can also send and receive signals (return signaling) between devices included in the core network 30, other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0233] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission and reception unit 120 , the transmission and reception antenna 130 , and the transmission path interface 140 .

[0234] In addition, the transmitting and receiving unit 120 may also send to the user terminal 20 at least one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, and Downlink Control Information (DCI) for use in determining spatial relationship information of an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) for multiple transmitting and receiving points.

[0235] The transmitting and receiving unit 120 may also receive the PUSCH repeatedly transmitted by the user terminal 20 using a spatial domain transmit filter based on the spatial relationship information.

[0236] (User Terminal)

[0237] Fig.14 2 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. In addition, the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided in one or more pieces.

[0238] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and the user terminal 20 may also be assumed to have other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0239] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which the present disclosure relates.

[0240] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 220.

[0241] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the public knowledge in the technical field involved in the present disclosure.

[0242] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured by a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0243] The transmitting / receiving antenna 230 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0244] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0245] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0246] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0247] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0248] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is activated (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0249] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0250] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230 .

[0251] The sending and receiving unit 220 (receiving processing unit 2212) can also apply analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0252] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to the received signal. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signal. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0253] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be constituted by at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0254] In addition, the control unit 210 can also use at least one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, and Downlink Control Information (DCI) to determine the spatial relationship information of the uplink shared channel (Physical Uplink Shared Channel (PUSCH)) for multiple transmitting and receiving points.

[0255] The transmitting and receiving unit 220 may also use a spatial domain transmission filter based on the spatial relationship information to repeatedly transmit the PUSCH. In addition, in the present disclosure, the spatial relationship information and the spatial relationship may also be replaced with each other.

[0256] The control unit 210 may determine the spatial relationship information based on a Sounding Reference Signal (SRS) resource list associated with a Sounding Reference Signal (SRS) resource set that is configured through the RRC signaling.

[0257] The control unit 210 may also determine the spatial relationship information based on the multiple SRS resource lists corresponding to the spatial relationship information of each layer. The control unit 210 may also determine the multiple SRS resource lists corresponding to the spatial relationship information of each layer based on at least one of MAC CE and DCI.

[0258] (Hardware Structure)

[0259] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more devices that are physically or logically separated can be directly or indirectly (for example, by wired, wireless, etc.) connected and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0260] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method is not particularly limited.

[0261] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig.15 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0262] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. are interchangeable. The hardware structure of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

[0263] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or may be performed by two or more processors simultaneously, sequentially, or in other ways. In addition, the processor 1001 may also be implemented by one or more chips.

[0264] The functions of the base station 10 and the user terminal 20 are realized, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0265] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), the sending and receiving unit 120 (220), etc. may also be implemented by the processor 1001.

[0266] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that enables a computer to perform at least a part of the operations described in the above-mentioned embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be implemented for other functional blocks.

[0267] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0268] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disk, a Blu-ray (registered trademark) disk, a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0269] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 can also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. can also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) can also be installed by the transmitting unit 120a (220a) and the receiving unit 120b (220b) separately physically or logically.

[0270] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0271] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or different buses may be used between the devices.

[0272] In addition, the base station 10 and the user terminal 20 may also 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 the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be installed using at least one of these hardware.

[0273] (Variation Example)

[0274] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may also be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the standard applied. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0275] A wireless frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) constituting a wireless frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

[0276] Here, the parameter set may also refer to a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of the subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, wireless frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, etc.

[0277] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0278] A time slot may also include multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0279] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be interchangeable.

[0280] For example, a subframe may also be referred to as a TTI, a plurality of consecutive subframes may also be referred to as a TTI, and a time slot or a mini time slot may also be referred to as a TTI. That is, at least one of a subframe and a 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. In addition, the unit representing a TTI may also be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0281] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited to this.

[0282] TTI may also be a transmission time unit for a data packet (transport block), a code block, a code word, etc. that has been channel-coded, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may also be shorter than the TTI.

[0283] In addition, when one time slot or one mini time slot is referred to as TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) may also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling may also be controlled.

[0284] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0285] In addition, a long TTI (e.g., normal TTI, subframe, etc.) may be replaced by a TTI having a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) may be replaced by a TTI having a TTI length shorter than that of the long TTI and longer than 1 ms.

[0286] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may also include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0287] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks, respectively.

[0288] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0289] In addition, a resource block may also be composed of one or more resource elements (RE). For example, one RE may also be a radio resource region of one subcarrier and one symbol.

[0290] A Bandwidth Part (BWP) (also referred to as a partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, a common RB may also be identified by an index of the RB relative to a common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0291] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured in one carrier.

[0292] At least one of the configured BWPs may be activated, and the UE may not assume that it transmits or receives a specific channel / signal other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0293] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0294] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0295] In the present disclosure, the names used for parameters, etc. are not limiting in all respects. In addition, the mathematical formulas, etc. using these parameters may also be different from those explicitly disclosed in the present disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not limiting in all respects.

[0296] Information, signals, etc. described in the present disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0297] Furthermore, information, signals, etc. can be output from a high layer (upper layer) to a low layer (lower layer) or from a low layer to a high layer. Information, signals, etc. can also be input and output via a plurality of network nodes.

[0298] The input and output information, signals, etc. may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input and output information, signals, etc. may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0299] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC)) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals or a combination thereof.

[0300] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (Layer 1 / Layer 2 (L1 / L2)) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, such as an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MACControl Element (CE)).

[0301] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0302] The determination can be made by a value represented by a bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a specific value).

[0303] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0304] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0305] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

[0306] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0307] In the present disclosure, terms such as "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro cell, and pico cell.

[0308] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0309] In the present disclosure, terms such as “Mobile Station (MS)”, “user terminal”, “User Equipment (UE)”, and “terminal” can be used interchangeably.

[0310] In some cases, the mobile station is also referred to as a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a hand set, a user agent, a mobile client, a client, or some other appropriate terminology.

[0311] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device carried in a mobile body, a mobile body, etc. The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous driving vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing a communication operation. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0312] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, expressions such as "uplink" and "downlink" may also be replaced by expressions corresponding to communication between terminals (for example, "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0313] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0314] In the present disclosure, operations are set to be performed by a base station, and sometimes by its upper node depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by a base station, one or more network nodes other than the base station (for example, considering a Mobility Management Entity (MME)), a Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0315] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, sequences, flow charts, etc. of the various methods / implementations described in this disclosure may be reversed in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0316] The various modes / implementations described in the present disclosure may also be applied to 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 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems expanded based on them. In addition, multiple systems can also be applied in combination (for example, LTE or LTE-A, combination with 5G, etc.).

[0317] The term “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the term “based on” means both “based only on” and “based at least on”.

[0318] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to a first and a second element does not mean that only two elements can be used, or that the first element must take precedence over the second element in some form.

[0319] The term "determining" as used in this disclosure may include a variety of operations in some cases. For example, "determining" may also be viewed as "judging", calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), ascertaining, etc.

[0320] In addition, "judgment (decision)" can also be regarded as a situation of "judgment (decision)" on receiving (for example, receiving information), transmitting (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc.

[0321] In addition, "judgment (decision)" can also be regarded as a situation of "judgment (decision)" on resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment (decision)" can also be regarded as a situation of "judgment (decision)" on some actions.

[0322] In addition, "judge (decide)" can also be replaced by "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0323] The terms "connected", "coupled", or all their variations used in this disclosure mean all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination of these. For example, "connection" may also be replaced by "access".

[0324] In the present disclosure, when two elements are connected, it can be considered that they are "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0325] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted as "different".

[0326] In the present disclosure, when the terms "include", "including", and their variations are used, these terms, like the term "comprising", have an inclusive meaning. Furthermore, the term "or" used in the present disclosure does not mean an exclusive OR.

[0327] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0328] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the present invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: a control unit that, upon receiving setting information related to a sounding reference signal resource set for a specific purpose, i.e., an SRS resource set for a specific purpose, through radio resource control signaling (RRC signaling), determines spatial relationship information for an uplink shared channel (PUSCH) for a plurality of transmission / reception points based on the SRS resource set for a specific purpose specified by a field of downlink control information (DCI); and a sending unit, which repeatedly sends the PUSCH based on the spatial relationship information, The control unit uses the TCI state set corresponding to the DCI code point and commonly used in both the downlink and uplink to repeatedly send the PUSCH when using the transmission setting indication state, i.e., the TCI state, as the spatial relationship information.

2. The terminal according to claim 1, wherein: The specific usage is the codebook CB or the non-codebook NCB.

3. A wireless communication method of a terminal, comprising: In a case where setting information related to a sounding reference signal resource set for a specific purpose, i.e., an SRS resource set for a specific purpose, is received through radio resource control signaling (RRC signaling), a step of determining spatial relationship information for an uplink shared channel (PUSCH) for a plurality of transmission / reception points based on the SRS resource set for a specific purpose specified by a field of downlink control information (DCI); and Based on the spatial relationship information, repeatedly sending the PUSCH; and When using the transmission setting indication state, i.e., the TCI state, as the spatial relationship information, the step of repeatedly sending the PUSCH is performed using a TCI state set corresponding to the DCI code point and commonly used in both the downlink and the uplink.

4. A base station, comprising: a transmitting unit, which transmits, to a terminal, downlink control information (DCI) including a field for specifying a SRS resource set for a specific purpose, when setting information related to a measurement reference signal resource set for a specific purpose, i.e., an SRS resource set for a specific purpose, is transmitted through radio resource control signaling (RRC signaling), wherein the SRS resource set for a specific purpose is used to determine spatial relationship information for an uplink shared channel (PUSCH) for a plurality of transmission and reception points; and a receiving unit, receiving the PUSCH repeatedly sent by the terminal based on the spatial relationship information, The receiving unit receives the PUSCH that is repeatedly sent by the terminal using a TCI state set corresponding to a DCI code point and commonly used in both the downlink and uplink when using a transmission configuration indication state, i.e., a TCI state, as the spatial relationship information.

5. A system having a terminal and a base station, The terminal has: a control unit that, upon receiving setting information related to a measurement reference signal resource set for a specific purpose, i.e., an SRS resource set for a specific purpose, through radio resource control signaling (RRC signaling), determines spatial relationship information for an uplink shared channel (PUSCH) for a plurality of transmission / reception points based on the SRS resource set for a specific purpose specified by a field of downlink control information (DCI); as well as a sending unit, which repeatedly sends the PUSCH based on the spatial relationship information, The control unit repeatedly transmits the PUSCH using a TCI state set corresponding to a DCI code point and commonly used in both a downlink and an uplink when using a transmission configuration indication state, i.e., a TCI state, as the spatial relationship information, The base station has: a sending unit, which sends the DCI for determining the spatial relationship information for the PUSCH to the terminal when the setting information is sent through the RRC signaling; as well as a receiving unit, receiving the PUSCH repeatedly sent by the terminal based on the spatial relationship information, The receiving unit receives the PUSCH that is repeatedly transmitted by the terminal using the TCI state set when the TCI state is used as the spatial relationship information.

Images