Terminal, wireless communication method, base station and system

Abstract

A terminal according to one embodiment of the present disclosure has a control unit for applying a plurality of spatial relation information (SRI) pieces to a plurality of physical uplink control channel (PUCCH) resources, and a transmission unit for transmitting uplink control information of the plurality of PUCCH resources using spatial domain transmission filters based on the plurality of spatial relation information pieces, respectively. According to one embodiment of the present disclosure, repeated PUCCH transmissions can be suitably realized.

Description

[Technical field]

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

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

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

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

[0005] In Rel.15 NR, a user terminal (User Equipment (UE)) may be configured with spatial relation information (also called Spatial Relation Information (SRI)) for a Physical Uplink Control Channel (PUCCH). In Rel-15 NR, one PUCCH SRI is controlled to be active for one PUCCH resource at a given time.

[0006] In NR, in order to improve the reliability of the PUCCH, it is considered that the UE repeatedly transmits the PUCCH to multiple transmission / reception points. The repeated transmission of the PUCCH may be called PUCCH repetition.

[0007] However, according to the conventional NR specifications, different SRIs cannot be applied in PUCCH repetition, and the reception quality of PUCCH cannot be effectively improved. In this case, for example, spatial diversity gain and high rank transmission when using multiple transmission and reception points cannot be suitably realized, and there is a risk that the increase in communication throughput is suppressed.

[0008] Therefore, the present disclosure provides a terminal and a wireless communication method capable of realizing suitable PUCCH repeated transmission. 、 base station and systems One of the aims is to provide. [Means for solving the problem]

[0009] A terminal according to one embodiment of the present disclosure includes a control unit that applies a plurality of spatial relation information (SRI) to a PUCCH repetitive transmission to a plurality of transmission / reception points (TRPs) in one Physical Uplink Control Channel (PUCCH) resource to which frequency hopping within one slot is applied, and a transmission unit that performs the PUCCH repetitive transmission using spatial domain filters based on the plurality of SRIs. The Downlink Control Information (DCI) for scheduling the Physical Downlink Shared Channel (PDSCH) includes a TPC command field for the number of the SRIs. do. Effect of the Invention

[0010] According to one aspect of the present disclosure, it is possible to realize suitable PUCCH repeated transmission. [Brief description of the drawings]

[0011] [Figure 1] 1A and 1B are diagrams illustrating an example of an SRI sequence according to the first embodiment. [Diagram 2] FIG. 2 illustrates an example in which the number of spatial relationships for a particular SRI sequence is limited. [Diagram 3] FIG. 3 is a diagram illustrating an example of PUCCH resource groups and corresponding spatial relationships. [Figure 4] 4A and 4B are diagrams illustrating an example of mapping of multiple SRIs to a PUCCH transmission according to the second embodiment. [Diagram 5] FIG. 5 is a diagram illustrating an example of mapping of a plurality of SRIs to a PUCCH transmission according to the third embodiment. [Figure 6] FIG. 6 is a diagram showing an example in which a group of PUCCH resource sets common to PUCCH transmission opportunities is set in embodiment 3.1. [Figure 7] FIG. 7 is a diagram showing an example in which a group of PUCCH resource sets is set for each PUCCH transmission opportunity in embodiment 3.1. [Figure 8]FIG. 8 is a diagram showing an example in which a group of PUCCH resource sets common to PUCCH transmission opportunities is set in embodiment 3.2. [Figure 9] FIG. 9 is a diagram showing an example in which a group of PUCCH resource sets is set for each PUCCH transmission opportunity in embodiment 3.2. [Figure 10] FIG. 10 is a diagram showing an example of using a non-scheduling DCI in embodiment 3.2. [Figure 11] FIG. 11 is a diagram showing an example of using a scheduling DCI in embodiment 3.2. [Figure 12] 12A to 12C are diagrams illustrating an example of a symbol gap according to the fourth embodiment. [Figure 13] FIG. 13 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 14] FIG. 14 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 15] FIG. 15 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 16] FIG. 16 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] (Spatial relationship information) In NR, the UE controls the transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and encoding) of at least one of an uplink signal and a channel (also referred to as a signal / channel) based on a predetermined spatial relation.

[0013] The spatial relationship that applies to a given signal / channel may be specified by Spatial Relation Information (SRI) that is signaled (configured) using higher layer signaling.

[0014] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like, or a combination of these.

[0015] The MAC signaling may be, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0016] For example, in Rel-15 NR, spatial relationship information (RRC "PUCCH-SpatialRelationInfo" information element) between a predetermined reference signal (Reference Signal (RS)) and an uplink control channel (Physical Uplink Control Channel (PUCCH)) may be included in PUCCH configuration information (RRC "PUCCH-Config" information element) and configured in the UE.

[0017] The predetermined RS may be at least one of a Synchronization Signal Block (SSB), a Channel State Information-Reference Signal (CSI-RS), and a Sounding Reference Signal (SRS).

[0018] The configured SRI may include an SRI Identifier (ID) for identifying the SRI. The SRI 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 predetermined RS. The spatial relationship information may also include a serving cell index, a Bandwidth Part (BWP) ID, etc., corresponding to the predetermined RS.

[0019] In addition, in this disclosure, the terms index, ID, indicator, resource ID, etc. may be read as interchangeable.

[0020] When the UE is configured with spatial relationship information regarding the SSB or CSI-RS and the PUCCH, the UE may transmit the PUCCH using the same spatial domain filter as the spatial domain filter for receiving the SSB or CSI-RS, i.e., in this case, the UE may assume that the UE receiving beam for the SSB or CSI-RS and the UE transmitting beam for the PUCCH are the same.

[0021] When the UE is configured with spatial relationship information regarding the SRS and the PUCCH, the UE may transmit the PUCCH using the same spatial domain filter as the spatial domain filter for transmitting the SRS, i.e., in this case, the UE may assume that the UE transmit beam for the SRS and the UE transmit beam for the PUCCH are the same.

[0022] In addition, the spatial domain filter for transmission by the base station, the downlink spatial domain transmission filter, and the transmission beam of the base station may be interchangeable. The spatial domain filter for reception by the base station, the uplink spatial domain receive filter, and the reception beam of the base station may be interchangeable.

[0023] In addition, a spatial domain filter for UE transmission, an uplink spatial domain transmission filter, and a transmission beam of the UE may be interchangeable. A spatial domain filter for UE reception, a downlink spatial domain receive filter, and a reception beam of the UE may be interchangeable.

[0024] The UE may be configured with the SRI on a PUCCH configuration (PUCCH-Config) basis. The SRI configured by the PUCCH configuration may be applied to all PUCCH resources configured by the PUCCH configuration.

[0025] If more than one SRI for PUCCH is configured, the UE may control based on the PUCCH spatial relation Activation / Deactivation MAC CE that one PUCCH SRI is active for one PUCCH resource at a time.

[0026] (Multi-TRP) In NR, it is considered that a UE performs UL transmission (e.g., PUCCH transmission) to one or more transmission / reception points (TRPs) (multi-TRPs (M-TRPs)).

[0027] As an example, in order to improve the reliability of PUCCH for use cases (or services) of ultra-high reliability and low latency (e.g., Ultra Reliable and Low Latency Communications (URLLC)), repeated transmission of PUCCH to which different SRIs are applied for multiple TRPs is being considered. The repeated transmission of PUCCH may be referred to as PUCCH repetition. The repeated transmission may simply be referred to as repetition.

[0028] Note that the SRI may correspond to a beam. For example, the UE may assume that PUCCHs of different SRIs are transmitted using different beams.

[0029] Repeated transmission of the PUCCH is expected to improve the reception quality of the PUCCH on the network side. However, in the current Rel. 15 / 16 NR, only the same spatial relationship is allowed for repeated transmission of the PUCCH.

[0030] Therefore, according to the conventional NR specifications, different SRIs cannot be applied in PUCCH repetition, and the reception quality of PUCCH cannot be effectively improved. In this case, the spatial diversity gain and high rank transmission when using multiple TRPs cannot be realized, and the increase in communication throughput may be suppressed.

[0031] Therefore, the present inventors have conceived a method for realizing a suitable PUCCH repetition transmission. In one aspect of the present disclosure, for example, for PUCCH repetition using different spatial relationships, a UE can appropriately determine the number of repetitions.

[0032] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0033] In the present disclosure, "A / B" may mean "at least one of A and B."

[0034] In addition, in the present disclosure, the terms activate, deactivate, indicate, select, configure, update, determine, etc. may be interchangeable. In addition, in the present disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0035] In the present disclosure, panel, beam, panel group, beam group, Uplink (UL) transmitting entity, TRP, spatial relationship information (SRI), spatial relationship, control resource set (COntrol REsource SET (CORESET)), Physical Downlink Shared Channel (PDSCH), codeword, base station, a specific antenna port (e.g., a DeModulation Reference Signal (DMRS) port), a specific antenna port group (e.g., a DMRS port group), a specific group (e.g., a Code Division Multiplexing (CDM) group, a specific reference signal group, a CORESET group), a specific resource (e.g., a specific reference signal resource), a specific resource set (e.g., a specific reference signal resource set), a CORESET pool, a PUCCH group (PUCCH resource group), spatial relationship group, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, etc. may be read as interchangeable.

[0036] Note that for a single DCI, the i-th TRP (TRP#i) may refer to the i-th TCI state, the i-th CDM group, etc. (i is an integer).

[0037] In addition, for multi-DCI, the i-th TRP (TRP#i) may mean the CORESET corresponding to CORESET pool index=i, the i-th TCI state, the i-th CDM group, etc. (i is an integer).

[0038] The panel may be associated with at least one of a group index of an SSB / CSI-RS group, a group index of a group-based beam report, and a group index of an SSB / CSI-RS group for group-based beam reporting.

[0039] In addition, a panel identifier (ID) and a panel may be interchangeable. That is, a TRP ID and a TRP, a CORESET group ID and a CORESET group, etc. may be interchangeable.

[0040] In the present disclosure, the terms index, ID, indicator, and resource ID may be interchangeable. In the present disclosure, the terms list, group, cluster, and subset may be interchangeable.

[0041] In the present disclosure, the mere mention of "spatial relationship" may be read interchangeably with the spatial relationship of PUCCH.

[0042] The PUCCH repetition in the present disclosure may be interchangeably read as MTRP-based repetition, Rel.17 repetition, repetition applying a different spatial relationship, etc. In addition, the PUCCH is described in the following example as a PUCCH used for Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) transmission for PDSCH, but may be a PUCCH for at least one UCI transmission such as HARQ-ACK, SR, CSI (e.g., aperiodic CSI), and may be interchangeably read as such.

[0043] In addition, in this disclosure, a plurality of spatial relations (SRIs) may be read as an SRI sequence, a set of SRIs, a pattern of SRIs, an SRI applied to a PUCCH repetition, and the like.

[0044] (Wireless communication method) <First embodiment> In the first embodiment, the UE may determine the number of repetitions of the PUCCH based on the number of configured / activated / specified spatial relationships (eg, the number of SRIs included in the SRI sequence).

[0045] The UE may be configured by RRC signaling with the SRI to apply to the PUCCH repetition in the form of an SRI sequence spanning the PUCCH repetition.

[0046] In addition, in this disclosure, SRI may be interchangeably read as spatial relationship information (SRI) of PUCCH, RRC parameter "spatialrelationinfo", SRI ID, etc. Also, in this disclosure, SRI sequence may be interchangeably read as a sequence of SRIs applied to PUCCH repetition, a set of SRIs, a pattern of SRIs, etc.

[0047] The UE may be configured with a predetermined number (e.g., M) of SRI sequences by RRC signaling, where the predetermined number M may be, for example, 8, 64, etc., or may be greater than 64.

[0048] When multiple SRI sequences are configured, the UE may further activate one or more SRI sequences (a subset of the SRI sequences) using the MAC CE. The maximum number of active SRI sequences may be limited to a predetermined number (e.g., 8).

[0049] One of the activated SRI sequences may be designated based on the DCI. For example, the UE may determine one of the activated SRI sequences as a sequence to be used for PUCCH repetition based on a specific field of the DCI and specific parameters (or information) related to the DCI.

[0050] Here, the specific field may be a PUCCH Resource Indicator (PRI) field, an SRI field, a Transmission Configuration Indication (TCI) field, or other field, or may be expressed by a combination of multiple fields.

[0051] The PRI field is included in DCI that schedules a PDSCH, and corresponds to information that specifies a PUCCH resource for transmitting a HARQ-ACK corresponding to the PDSCH.

[0052] The SRI field may be a field that specifies the spatial relationship of the PUCCH. The SRI field may be included in the DCI if its presence (inclusion) in the DCI is configured by higher layer signaling.

[0053] The TCI field may be a field indicating the TCI state of the scheduled PDSCH, or it may be a UL TCI field indicating the UL TCI state used for PUCCH transmission.

[0054] The other field may be, for example, a field for controlling the PUCCH (for example, a field called a PUCCH Control field). The PUCCH control field may be included in the DCI if its presence (inclusion) in the DCI is configured by higher layer signaling.

[0055] The specific parameters may include at least one of the following: (detected) DCI (or corresponding to or used for receiving the DCI), time resource, frequency resource, Control Channel Element (CCE) index, Physical Resource Block (PRB) index, Resource Element (RE) index, search space index, Control Resource Set (CORESET) index, CORESET pool index, and aggregation level. In other words, the specific parameters correspond to implicit notification using DCI.

[0056] 1A and 1B are diagrams illustrating an example of an SRI sequence according to the first embodiment. Fig. 1A illustrates a value of an SRI field included in DCI and a corresponding SRI sequence. In this example, the SRI field is 3 bits, but the number of bits is not limited to this.

[0057] In addition, in the following, the present disclosure will be described taking as an example a case where the SRI sequence is specified by the SRI field, but is not limited thereto. The specification of the SRI sequence based on the SRI field in the following description may be read as the specification of the SRI sequence based on at least one of the above-mentioned specific fields and specific parameters. In the present disclosure, the fields listed in the above-mentioned specific fields may be read as mutually interchangeable.

[0058] In Fig. 1A, different SRI sequences (first to eighth SRI sequences) are designated according to the value of the SRI field. The UE may assume that the SRI sequence IDs activated by the MAC CE correspond to the values ​​of each SRI field in ascending or descending order. In other words, it may assume that there is a one-to-one correspondence between the IDs of the activated SRI sequences and the values ​​of the SRI field, starting from the smallest, when the IDs are arranged in ascending or descending order.

[0059] 1B is a diagram showing a correspondence relationship between an SRI sequence ID and a corresponding SRI sequence (a set of SRIs), which may be set / activated by higher layer signaling.

[0060] In this example, SRI sequence ID=1 corresponds to {#1, #2, #3, #4}, SRI sequence ID=5 corresponds to {#1, #2}, and SRI sequence ID=8 corresponds to {#1}. Note that in this disclosure, for simplicity, SRI ID#x is also represented as SRI#x or simply #x.

[0061] As described above, the SRI sequence may indicate the SRI to be applied to each PUCCH repetition. For example, in the case where the i-th SRI sequence in Fig. 1A corresponds to the SRI sequence ID=i+1 in Fig. 1B, a UE designated with an SRI field=000 may assume that the number of PUCCH repetitions is 4 and transmit the first, second, third, and fourth PUCCH repetitions by applying SRI#1, #2, #3, and #4, respectively.

[0062] Also, a UE with SRI field=100 specified may assume that the number of PUCCH repetitions is 2, and transmit the first and second PUCCH repetitions by applying SRI#1 and #2, respectively.

[0063] Furthermore, a UE to which an SRI field of 111 is specified may transmit PUCCH by applying SRI#1, assuming that the number of PUCCH repetitions is 1 (PUCCH transmission without repetition is specified).

[0064] In addition, in the present disclosure, PUCCH repeat transmission using different spatial relationships may be read as PUCCH repeat transmission using precoder cycling, and vice versa.

[0065] According to the first embodiment described above, it is possible to appropriately determine the number of repetitions and perform PUCCH repeated transmission.

[0066] <Modification of the first embodiment> The number of (configurable) spatial relationships associated with some SRI field values ​​(or SRI sequence ID values) may be limited compared to other SRI field values ​​(or SRI sequence ID values).

[0067] For example, the number of spatial relationships associated with some SRI field values ​​(or SRI sequence ID values) may be limited to a specific value (e.g., 1 or 2) (other SRI field values ​​(or SRI values) are not particularly limited). When specifying PUCCH transmission without repetition, it is sufficient to specify to the UE an SRI field / SRI sequence ID value in which the number of spatial relationships is limited to 1. By limiting the number of spatial relationships in this way, it is possible to suitably suppress an increase in signaling overhead for SRI / SRI sequence configuration.

[0068] 2 is a diagram showing an example in which the number of spatial relationships of a specific SRI sequence is limited. In this example, the number of spatial relationships associated with SRI sequence ID=0 is limited to 1. The SRI corresponding to SRI ID#x_1 may be predefined by a specification, may be configured in the UE by higher layer signaling, or may be determined based on the UE capability.

[0069] <Modification 2 of the first embodiment> In NR Rel.16 and later, PUCCH resource groups will be introduced, and control for specifying / updating multiple spatial relationships for each group is being considered.

[0070] 3 is a diagram showing an example of a spatial relationship between PUCCH resource groups. In this example, PRI=0 to 7 correspond to PUCCH resources 1-8, PUCCH resources 1-4 correspond to group 1, and PUCCH resources 5-8 correspond to group 2.

[0071] Here, it is assumed that one spatial relationship (SRI#1) is set for group 1 and two spatial relationships (SRI#1, #2) are set for group 2 by higher layer signaling (eg, RRC, MAC CE).

[0072] As described above in the first embodiment, the UE may determine the number of repetitions of PUCCH based on the number of configured / activated / specified spatial relationships. In the example of Fig. 3, if the PUCCH resource belonging to group 1 is specified by the PRI, the UE may perform PUCCH transmission with one repetition (no repetition), and if the PUCCH resource belonging to group 2 is specified by the PRI, the UE may perform PUCCH transmission with two repetitions.

[0073] <Second embodiment> In the second embodiment, the UE transmits UCI using multiple SRIs in one PUCCH resource in one slot, where the multiple SRIs may be provided as described above in the first embodiment.

[0074] 4A and 4B are diagrams illustrating an example of mapping of multiple SRIs to PUCCH transmission according to the second embodiment. In this example, one PUCCH resource using N symbols in one slot is illustrated. Intra frequency hopping is applied to this PUCCH resource, and the first frequency hop has a time length of Floor(N / 2) symbols, and the second frequency hop has a time length of N-Floor(N / 2) symbols. Note that Floor(X) is a value obtained by applying a floor function to X.

[0075] Assume that it is decided to use multiple SRIs (SRI#1, #2) for this PUCCH transmission. Figure 4A shows an example of mapping SRIs for each hop unit of intra-frequency hopping. In this case, the symbol boundaries of SRI#1 and #2 become frequency hopping boundaries and can be uniquely determined.

[0076] The UE may, for example, assign a first SRI to one of the first and second frequency hops and a second SRI to the other of them.

[0077] FIG. 4B shows an example of mapping SRI in units of symbols of PUCCH resources. In this example, the UE applies SRI#1 to only the number of symbols greater than Floor(N / 2) from the first symbol among N symbols, and applies SRI#2 thereafter. In this case, the UE assigns the first SRI to both the first and second frequency hops (across multiple frequency hops), and assigns the second SRI to the second frequency hop. Conversely, the number of symbols of SRI#1 may be less than the number of symbols of SRI#2.

[0078] For example, the UE may be notified of the positions of the symbol boundaries of SRI#1 and #2 by higher layer signaling, physical layer signaling, or a combination thereof. The UE may be notified of a bitmap indicating whether SRI#1 or #2 is applied to each symbol by higher layer signaling, physical layer signaling, or a combination thereof.

[0079] The symbol unit here may be interpreted as a symbol set unit (for example, a two-symbol unit) in consideration of the trade-off between flexibility and notification overhead.

[0080] The mapping in Fig. 4B allows for more flexible allocation of SRI than the mapping in Fig. 4A. For example, the beam may be mapped so that the time length of a more preferable beam (SRI) is increased.

[0081] For example, the UE may assign a first SRI to a PUCCH transmission opportunity with a smaller starting symbol number, and assign a second SRI to a PUCCH transmission opportunity with a larger starting symbol number. Note that in this disclosure, a PUCCH transmission opportunity may refer to a PUCCH (or a resource of the PUCCH or a time resource of the PUCCH) to which the same SRI is applied.

[0082] [TPC] The following describes Transmitter Power Control (TPC) related parameters (eg, TPC command, α, P0, Pathloss Reference Signal (PL-RS))) for each PUCCH transmission opportunity.

[0083] For α, P0, and PL-RS that are set by higher layer signaling, when they are set together / in association / correspondence with the spatial relationship (SRI), the parameters for each PUCCH transmission opportunity are appropriately assigned even if a different SRI is applied for each PUCCH transmission opportunity.

[0084] A DCI (e.g., DCI format 1_1) (which may be referred to as a DL assignment DCI) that schedules a PDSCH may include a TPC command field for each PUCCH transmission opportunity (in other words, for the number of SRIs). This configuration allows the TPC for the PUCCH transmission opportunity corresponding to each SRI to be appropriately controlled.

[0085] The DCI may include one TPC command field indicating a TPC command for each PUCCH transmission opportunity. This configuration can prevent an increase in the size of the DCI.

[0086] The UE may apply one designated TPC command equally to each PUCCH transmission opportunity.

[0087] The UE may apply one specified TPC command to a specific PUCCH transmission opportunity (e.g., the first PUCCH transmission opportunity), and may control other PUCCH transmission opportunities as if no TPC command was notified (TPC correction value = 0 or closed-loop power control is not applied).

[0088] The UE may interpret the TPC command field of the DCI as indicating the TPC command field of each PUCCH transmission opportunity. For example, if the TPC command field is 2 bits, the UE may determine that the first half bit (1 bit in this example) indicates the TPC command field of the PUCCH transmission opportunity corresponding to the first SRI, and the second half bit (1 bit in this example) indicates the TPC command field of the PUCCH transmission opportunity corresponding to the second SRI. Note that the first half bit and the second half bit do not have to be the same number of bits, and may be different numbers of bits.

[0089] This one bit may correspond to, for example, a correction value of +1 or -1 of the TPC command. The value of this correction value may be determined in advance by a specification, or may be set by higher layer signaling. The value of this correction value may be set / defined as a value for each PUCCH transmission opportunity, or may be set / defined as a common value for all PUCCH transmission opportunities.

[0090] The UE may determine that a bit string with a specific bit (e.g., '0', '1') or bit string before or after the above-mentioned first half bits indicates a TPC command field of a PUCCH transmission opportunity corresponding to a first SRI. The UE may also determine that a bit string with a specific bit (e.g., '0', '1') or bit string before or after the above-mentioned second half bits indicates a TPC command field of a PUCCH transmission opportunity corresponding to a second SRI.

[0091] The UE may determine the correction value of the TPC command of each PUCCH transmission opportunity based on the correspondence between the value of the specified one TPC command field and the correction value of the TPC command of each PUCCH transmission opportunity. The correspondence may be specified in advance by a specification, may be set in the UE by higher layer signaling, may be specified by DCI, or may be determined based on UE capability. With this configuration, the TPC command of each PUCCH transmission opportunity can be appropriately and flexibly indicated while suppressing an increase in the size of DCI.

[0092] [Phase continuity] The existing Rel.15 / 16 NR specifications stipulate that if intra-slot frequency hopping for PUCCH is enabled by higher layer parameters, the channel on which a symbol of an antenna port used for uplink transmission is transmitted may be estimated from the channel on which another symbol of the same antenna port is transmitted, provided that these two symbols correspond to the same frequency hop (regardless of whether this frequency hop distance is zero or not).

[0093] In other words, in the existing specifications, the phases within the same frequency hop in the same slot are continuous (channel estimation results of consecutive symbols can be used).

[0094] In the second embodiment, the following provisions may be introduced: If intra-slot frequency hopping for PUCCH is enabled by higher layer parameters, the channel on which a symbol of an antenna port used for uplink transmission is carried may be estimated from the channel on which another symbol of the same antenna port is carried, provided that these two symbols correspond to the same SRI (regardless of whether these two symbols correspond to the same frequency hop or not).

[0095] In the second embodiment, when multiple SRIs are assigned to one PUCCH resource, it may be assumed that the phases in the PUCCH transmission opportunity corresponding to one SRI are continuous (any two symbols in this PUCCH transmission opportunity can use the channel estimation result of each other). With this configuration, when the same SRI is applied in PUCCH transmission opportunities across different frequency hops in the same slot as shown in FIG. 4B, the channel estimation result in the symbol in the PUCCH transmission opportunity can be suitably used.

[0096] According to the second embodiment described above, it is possible to appropriately perform repeated transmission to which different SRIs are applied, based on a single DCI.

[0097] <Third embodiment> In the third embodiment, the UE transmits UCI using multiple SRIs in multiple PUCCH resources in one slot, where the multiple SRIs may be provided as described above in the first embodiment.

[0098] The UCI may be coded in each PUCCH resource respectively. That is, the same UCI may be transmitted in each of the multiple PUCCHs. This operation may be called UCI repetition. In the case of UCI repetition, the base station can decode the UCI if it can receive one of the PUCCH resources.

[0099] The UCI may be encoded across the multiple PUCCH resources. That is, one UCI may be divided and transmitted across the multiple PUCCH resources. This operation may be called UCI encoding across multiple PUCCH resources. In the case of UCI encoding across multiple PUCCH resources, it is desirable for the base station to receive both PUCCH resources for decoding. If both PUCCH resources can be received with a certain level of quality or higher, improved performance can be expected.

[0100] FIG. 5 is a diagram showing an example of mapping of multiple SRIs to PUCCH transmission according to the third embodiment. In this example, two PUCCH resources (PUCCH resources #1, #2) are shown in one slot. For simplicity, intra-frequency hopping is not applied to each PUCCH resource, but it may be applied. The UE may apply different SRIs (SRIs #1, #2) to PUCCH resources #1 and #2, respectively.

[0101] It should be noted that there may be no restrictions on the combination of two PUCCH formats transmitted with different SRIs in a slot, or there may be at least one of the following restrictions: Combinations of short PUCCH formats with short PUCCH formats of relatively short duration are prohibited (not expected) or permitted, Combinations of short PUCCH formats with longer PUCCH formats are prohibited (not expected) or permitted. · Combinations of long PUCCH formats with long PUCCH formats are prohibited (not expected) or allowed.

[0102] The short PUCCH format may be, for example, PUCCH format 0 or 2 having a time length of 1 or 2 symbols. The long PUCCH format may be, for example, PUCCH format 1, 3 or 4 having a time length of 4 symbols or more. The definition is not limited to this, and the long PUCCH format may be any format as long as it has a longer time length than the short PUCCH format.

[0103] Below, we will explain the case where two PUCCHs transmitted using different SRIs within a slot are triggered using one DCI (single DCI) (embodiment 3.1) and the case where they are each triggered using separate DCIs (multiple DCIs) (embodiment 3.2).

[0104] [Embodiment 3.1] In embodiment 3.1, the TPC-related parameters for each PUCCH transmission opportunity (in the third embodiment, a PUCCH transmission opportunity corresponds to a PUCCH resource) may be set / specified in the same manner as described in the first embodiment.

[0105] The following describes the PRI field in embodiment 3.1.

[0106] A DCI (e.g., DCI format 1_1) (which may be referred to as a DL assignment DCI) that schedules a PDSCH may include a PRI field for each PUCCH transmission opportunity (in other words, for the number of SRIs). This configuration allows appropriate control of PUCCH resources for PUCCH transmission opportunities corresponding to each SRI.

[0107] The DCI may include one PRI field indicating the PUCCH resource of each PUCCH transmission opportunity. This configuration can prevent the size of the DCI from increasing.

[0108] The UE may determine the PUCCH resource for a particular PUCCH transmission opportunity (eg, the first PUCCH transmission opportunity) based on one specified PRI field, and may determine the PUCCH resource for other PUCCH transmission opportunities based on a particular rule.

[0109] The UE may determine that the PUCCH resources of the other PUCCH transmission opportunities are at a predetermined time / frequency offset from the PUCCH resources of the first PUCCH transmission opportunity, where the predetermined time / frequency offset may be predefined by a specification, may be configured in the UE by higher layer signaling, or may be determined based on UE capabilities.

[0110] The UE may determine that the PUCCH resource for the other PUCCH transmission opportunity is the PUCCH resource corresponding to the value of the specified one PRI field plus or minus an offset (or the remainder when the value is divided by the number of possible values ​​of the PRI field). For example, if the offset is '2' and the value of the specified one PRI field is '1', the UE may determine that the PRI field value=3 (=1+2) has been notified for the other PUCCH transmission opportunity and determine the PUCCH resource. The offset may be predefined by a specification, may be configured in the UE by higher layer signaling, or may be determined based on the UE capabilities.

[0111] The UE may interpret the PRI field of the DCI as indicating the PRI field of each PUCCH transmission opportunity. For example, if the PRI field is 2 bits, the UE may determine that the first half bit (1 bit in this example) indicates the PRI field of the PUCCH transmission opportunity corresponding to the first SRI, and the second half bit (1 bit in this example) indicates the PRI field of the PUCCH transmission opportunity corresponding to the second SRI. Note that the first half bit and the second half bit do not have to be the same number of bits, and may be different numbers of bits.

[0112] The correspondence between the value of the first half bit or the second half bit and the PUCCH resource may be determined in advance by a specification, or may be set by higher layer signaling. This correspondence may be set / defined for each PUCCH transmission opportunity, or may be set / defined commonly for all PUCCH transmission opportunities.

[0113] The UE may determine that a bit string with a specific bit (e.g., '0', '1') or bit string added before or after the first half bit indicates a PRI field of a PUCCH transmission opportunity corresponding to a first SRI. The UE may also determine that a bit string with a specific bit (e.g., '0', '1') or bit string added before or after the second half bit indicates a PRI field of a PUCCH transmission opportunity corresponding to a second SRI.

[0114] The UE may determine the PUCCH resource of each PUCCH transmission opportunity based on the correspondence between the value of one specified PRI field and the PUCCH resource (or the value of PRI) of each PUCCH transmission opportunity. The correspondence may be specified in advance by a specification, may be set in the UE by higher layer signaling, may be specified by DCI, or may be determined based on UE capability. With this configuration, the PUCCH resource of each PUCCH transmission opportunity can be appropriately and flexibly indicated while suppressing an increase in the size of DCI.

[0115] In addition, the UE may be configured by a higher layer with a PUCCH resource set common to the PUCCH transmission opportunities, or may be configured by a higher layer with a PUCCH resource set for each PUCCH transmission opportunity. The UE may determine a PUCCH resource for each PUCCH transmission opportunity based on at least one of a PRI field for each PUCCH transmission opportunity and one PRI field common to the PUCCH transmission opportunities as described above. The PUCCH resource set referred to for determining the PUCCH resource may be used in sequence (switched) for each PUCCH transmission opportunity, or may be determined based on a CORESET pool index of the CORESET in which DCI is detected.

[0116] 6 is a diagram showing an example in which a group of PUCCH resource sets is set for a common PUCCH transmission opportunity in embodiment 3.1. In this example, a group of PUCCH resource sets consisting of PUCCH resource sets 1, 2, ... is set for a UE for a common PUCCH transmission opportunity (without distinguishing between PUCCH transmission opportunities). Note that TRP1 and 2 in the figure are conceptual examples, and these may be the same TRP.

[0117] In the present disclosure, the PUCCH resource set i may be defined such that the larger the UCI bit size, the larger the i used, but this is not limited thereto. Also, an example is shown in which the number of PUCCH resources included in one PUCCH resource set is 8, but this is not limited thereto.

[0118] In addition, in the following example, an example is shown in which HARQ-ACK transmission is transmitted using the PUCCH resources of PUCCH resource set 2 (that is, PUCCH resource set 2 is selected based on the size of UCI), but this is not limiting.

[0119] 6, in PUCCH resource set 1, PUCCH resources 1 to 8 are configured corresponding to DCI (PRI field (PRI#1 or PRI#2 field), the same applies in the following drawings) = 000 to 111. In PUCCH resource set 2, PUCCH resources 11 to 18 are configured corresponding to DCI = 000 to 111.

[0120] As shown in the upper left of Figure 6, the UE receives DCI1 indicating the PDSCH of TRP1, and transmits HARQ1 (HARQ-ACK) corresponding to the PDSCH. Here, the PUCCH resource for HARQ1 may be specified by the PRI#1 and PRI#2 fields of DCI1. Here, the PRI#1 field of DCI1 is 010, the PRI#2 field is 000, and based on the table on the right of Figure 6, an example is shown in which the PUCCH resource of the UE for the first PUCCH transmission opportunity (SRI for TRP1 is applied) is resource 13, and the PUCCH resource of the second PUCCH transmission opportunity (SRI for TRP2 is applied) is resource 11.

[0121] 7 is a diagram showing an example in which a group of PUCCH resource sets is configured for each PUCCH transmission opportunity in embodiment 3.1. In this example, a group of PUCCH resource sets consisting of PUCCH resource sets 1, 2, ... is configured for the UE for each PUCH transmission opportunity.

[0122] 7, in PUCCH resource set 1 for the first PUCCH transmission opportunity, PUCCH resources 1-1 to 1-8 are configured corresponding to DCI=000 to 111. In PUCCH resource set 2 for the first PUCCH transmission opportunity, PUCCH resources 1-11 to 1-18 are configured corresponding to DCI=000 to 111.

[0123] 7, in PUCCH resource set 1 for the second PUCCH transmission opportunity, PUCCH resources 2-1 through 2-8 are configured corresponding to DCI=000 through 111. In PUCCH resource set 2 for the second PUCCH transmission opportunity, PUCCH resources 2-11 through 2-18 are configured corresponding to DCI=000 through 111.

[0124] As shown in the upper left of Figure 7, the UE receives DCI1 indicating the PDSCH of TRP1, and transmits HARQ1 (HARQ-ACK) corresponding to the PDSCH. Here, the PUCCH resource for HARQ1 may be specified by the PRI#1 and PRI#2 fields of DCI1. Here, the PRI#1 field of DCI1 is 000, the PRI#2 field is 000, and based on the table on the right of Figure 7, an example is shown in which the PUCCH resource of the UE for the first PUCCH transmission opportunity (SRI for TRP1 is applied) is resource 1-11, and the PUCCH resource of the second PUCCH transmission opportunity (SRI for TRP2 is applied) is resource 2-11.

[0125] [Embodiment 3.2] In embodiment 3.2, the TPC command, PRI, etc. of the PUCCH transmission opportunity for TRP#1 may be specified using DCI for TRP#1 (e.g., DCI detected in CORESET corresponding to CORESET pool index=0). Also, the TPC command, PRI, etc. of the PUCCH transmission opportunity for TRP#2 may be specified using DCI for TRP#2 (e.g., DCI detected in CORESET corresponding to CORESET pool index=1).

[0126] At least one of these DCIs (multiple DCIs) (e.g., a first DCI) may be used to schedule a PDSCH. The other DCI (e.g., a second DCI) not used to schedule a PDSCH may be used to notify a PUCCH resource, a TPC command, etc., for a PUCCH for transmitting a HARQ-ACK for the PDSCH scheduled by the first DCI.

[0127] The first DCI and the second DCI may be of the same DCI format (e.g., DCI format 1_1) or may be of different DCI formats and may have a Cyclic Redundancy Check (CRC) that is scrambled by a Radio Network Temporary Identifier (RNTI).

[0128] In addition, the UE may be configured by a higher layer with a PUCCH resource set common to PUCCH transmission opportunities, or may be configured by a higher layer with a PUCCH resource set for each PUCCH transmission opportunity. The PUCCH resource set referred to for determining the PUCCH resource may be used in rotation (switched) for each PUCCH transmission opportunity, or may be determined based on the CORESET pool index of the CORESET in which DCI is detected.

[0129] Fig. 8 is a diagram showing an example in which a group of PUCCH resource sets common to PUCCH transmission opportunities is set in embodiment 3.2. Fig. 9 is a diagram showing an example in which a group of PUCCH resource sets is set for each PUCCH transmission opportunity in embodiment 3.2. Fig. 8 is similar to the example in Fig. 6, and Fig. 9 is similar to the example in Fig. 7, but the differences are as follows.

[0130] The UE detects DCI#1 from TRP#1 (e.g., CORESET with CORESET pool index=0) and DCI#2 from TRP#2 (e.g., CORESET with CORESET pool index=1). A PDSCH is scheduled by at least one of DCI#1 and #2, the PRI#1 field of DCI#1 indicates the PUCCH resource of the first PUCCH transmission opportunity (SRI for TRP1 is applied), and the PRI#2 field of DCI#2 indicates the PUCCH resource of the second PUCCH transmission opportunity (SRI for TRP2 is applied).

[0131] [[DCI without PDSCH scheduling]] A DCI that triggers a PUCCH resource for transmitting a HARQ-ACK for a PDSCH scheduled by another DCI and is not used for scheduling the PDSCH (for example, the above-mentioned second DCI) will be described. Hereinafter, in this disclosure, this DCI is also referred to as a non-scheduling DCI, a PUCCH trigger-only DCI, etc.

[0132] A UE that detects a non-scheduling DCI may not receive the PDSCH or may not transmit a HARQ-ACK for the PDSCH, even if the non-scheduling DCI includes information for scheduling the PDSCH. A UE that detects a non-scheduling DCI may transmit a HARQ-ACK for a PDSCH scheduled by another DCI (e.g., the above-mentioned first DCI) (or an aperiodic CSI report triggered by the other DCI) using a PUCCH resource, a TPC command, or the like indicated by the non-scheduling DCI.

[0133] The fields included in the non-scheduling DCI may include a HARQ process number field indicating the same HARQ process number (or HARQ process ID) as the other DCI indicates, or may include a New Data Indicator (NDI) field indicating the same value of NDI as the other DCI indicates. The non-scheduling DCI may not include information that can determine the schedule (e.g., a frequency domain resource allocation field, a time domain resource allocation field, etc.).

[0134] The UE may determine that the detected DCI is a non-scheduling DCI if the DCI satisfies at least one of the following conditions: - A particular field in the DCI has a given value; The DCI was detected in a specific CORESET.

[0135] This "a particular field has a predetermined value" may correspond to at least one of "the HARQ process number field is the same as another DCI" and "the NDI field is the same as another DCI".

[0136] The above-mentioned specific CORESET may correspond to at least one of the following: the same CORESET as the CORESET in which the other DCI was detected, a CORESET different from the CORESET in which the other DCI was detected, a CORESET corresponding to the same CORESET pool index as the CORESET in which the other DCI was detected, and a CORESET corresponding to a CORESET pool index different from the CORESET in which the other DCI was detected.

[0137] A receivable period for non-scheduled DCI may be defined. The UE may assume that DCI detected during the receivable period can be determined as non-scheduled DCI, and that other DCI cannot be determined as non-scheduled DCI. When the receivable period for non-scheduled DCI is defined in this manner, it can be suitably distinguished from DCI for retransmission of normal PDSCH.

[0138] The period of availability may be at least one of the following: Between the reception symbol of another DCI (the last symbol received) and the start of reception of the PDSCH scheduled by that DCI, Between the reception symbol of another DCI and the reception end symbol (last symbol) of the PDSCH scheduled by that DCI, Between the reception symbol of another DCI and the start symbol of PUCCH transmission triggered by that DCI, Between the reception symbol of another DCI and the end symbol of the PUCCH transmission triggered by that DCI.

[0139] Some or all of the symbols in the above description of the receivable period may be interpreted as other time units (e.g., slots, subslots, subframes, frames, etc.) For example, the last example may be interpreted as "from after the reception symbol of another DCI to the transmission end slot of the PUCCH triggered by the other DCI."

[0140] The receivable period may be defined differently (different values ​​may be used) depending on whether the above-mentioned UCI repetition is used (the same UCI is transmitted on the PUCCH corresponding to another DCI and the PUCCH corresponding to a non-scheduled DCI) or whether the above-mentioned UCI encoding across multiple PUCCH resources is used (UCI is encoded and transmitted across the PUCCH corresponding to another DCI and the PUCCH corresponding to a non-scheduled DCI).

[0141] Figure 10 is a diagram showing an example of using a non-scheduling DCI in embodiment 3.2. This example is similar to Figures 8 and 9, and DCI1 schedules a PDSCH and controls the transmission of the corresponding PUCCH1. DCI2 does not schedule a PDSCH, but the transmission of PUCCH2 that transmits UCI for the PDSCH scheduled by DCI1 is controlled by the DCI2.

[0142] Period 1 corresponds to a receivable period from after the reception symbol of the other DCI described above until the reception start symbol of the PDSCH scheduled by the other DCI.

[0143] Period 2 corresponds to the receivable period from after the reception symbol of the other DCI described above to the reception end symbol of the PDSCH scheduled by the other DCI.

[0144] Period 3 corresponds to the receivable period from after the reception symbol of the above-mentioned different DCI to the transmission start symbol of the PUCCH triggered by the different DCI.

[0145] Since the non-scheduling DCI does not schedule the PDSCH, the UE does not need to count the non-scheduling DCI in terms of the HARQ codebook (HARQ-ACK codebook), which may be a semi-static HARQ codebook, a dynamic HARQ codebook, or both.

[0146] For non-scheduling DCI, the Downlink Assignment Indicator (Index) (DAI) may not be counted. The DAI may be a Counter DAI (C-DAI) and / or a Total DAI (T-DAI). The UE may ignore the DAI field of non-scheduling DCI.

[0147] On the other hand, the DAI may be counted for non-scheduled DCI. The UE may control HARQ-ACK taking into account the DAI field of the non-scheduled DCI. In this case, the base station can grasp errors (e.g., reception errors) for the non-scheduled DCI.

[0148] DCI to schedule PDSCH A DCI that triggers PUCCH resources for transmitting a HARQ-ACK for a PDSCH scheduled by another DCI may be used for scheduling the same PDSCH, which may be used as a backup in case the other DCI is erroneous.

[0149] The DCI and the other DCI may have the same values ​​in fields other than the PRI field and the TPC command field.

[0150] Even if the UE receives an incorrect DCI, the UE can receive the PDSCH that is supposed to be scheduled by the DCI based on the DCI, and can transmit a HARQ-ACK corresponding to the PDSCH using the PUCCH corresponding to the DCI.

[0151] Figure 11 is a diagram showing an example of using a scheduling DCI in embodiment 3.2. This example is similar to Figures 8 and 9, and DCI1 schedules a PDSCH and controls the transmission of the corresponding PUCCH1. DCI2 schedules the same PDSCH, and the transmission of PUCCH2 that transmits UCI for the PDSCH scheduled by DCI1 is controlled by DCI2.

[0152] In this example, the UE fails to receive DCI1 but succeeds in receiving DCI2, and therefore can receive the PDSCH. Also, since the UE fails to receive DCI1, it cannot obtain information on PUCCH1, and therefore cannot transmit UCI corresponding to the PDSCH on PUCCH1. On the other hand, since the UE succeeds in receiving DCI2, it transmits UCI corresponding to the PDSCH on PUCCH2.

[0153] Control as shown in Figure 11, in which multiple DCIs schedule the same PDSCH, may be performed when a CORESET having a CORESET pool index is not configured in the UE at all, when the CORESET pool indexes of the CORESETs in which the multiple DCIs are detected are the same, or when the CORESET pool indexes of the CORESETs in which the multiple DCIs are detected are different.

[0154] [Phase continuity] In a third embodiment, when multiple SRIs are assigned to multiple PUCCH resources in one slot, at least one of the following assumptions may be made: For two symbols of multiple PUCCH resources, the phases are continuous with each other (the channel does not fluctuate in consecutive symbols, and the channel estimation result can be used); For two symbols of multiple PUCCH resources, the phases are not consecutive with each other (the channel may fluctuate in consecutive symbols, and the channel estimation result cannot be used); If two symbols of multiple PUCCH resources are consecutive and have the same SRI, the phases of these symbols are consecutive, otherwise (e.g., the SRIs are different), the phases are not consecutive.

[0155] According to the third embodiment described above, it is possible to appropriately perform repeated transmission to which different SRIs are applied based on multi-DCI.

[0156] <Fourth embodiment> The fourth embodiment relates to a symbol gap when switching SRI.

[0157] As shown in the second embodiment, the third embodiment, etc., when there are multiple PUCCH transmission opportunities for different SRIs in the same slot, the SRI (beam) switching process of the UE may take time, so there may be at least one of the following constraints: A symbol gap is required between PUCCH#1 and PUCCH#2, which have different SRIs. A symbol gap is required between symbols with different SRIs within one PUCCH resource. A symbol gap is required between PUCCH#1 and PUCCH#2, which have different SRIs, but no symbol gap is required between symbols with different SRIs within one PUCCH resource. A first symbol gap is required between PUCCH#1 and PUCCH#2, which have different SRIs, and a second symbol gap is required between symbols with different SRIs within one PUCCH resource (e.g., the first symbol gap may be larger than, the same as, or smaller than the second symbol gap).

[0158] The above constraint may be a constraint for each UL BWP, a constraint for each UL carrier (or cell), or a constraint common to multiple UL carriers (or cells).

[0159] A symbol gap may be used to constrain PUCCH resource allocation (e.g., prohibit PUCCH resource allocation within a symbol gap). A UE may be assigned PUCCH resources that overlap with a symbol gap, in which case the UE may assume that no PUCCH transmission is required within that symbol gap.

[0160] The value of the symbol gap may be predefined by a specification, may be configured in the UE by higher layer signaling, may be specified by DCI, or may be determined based on the UE capabilities. Note that the value of the symbol gap is not limited to a positive value, and may be 0, a negative value, etc.

[0161] 12A to 12C are diagrams showing an example of a symbol gap according to the fourth embodiment. Fig. 12A corresponds to a case where UCI is transmitted using multiple SRIs (SRIs #1, #2) in multiple PUCCH resources (PUCCHs #1, #2) in one slot. As in this example, PUCCH resources may be allocated so that a symbol gap is secured between the PUCCH resources.

[0162] 12B corresponds to a case where UCI is transmitted using multiple SRIs (SRIs #1, #2) in one PUCCH resource (PUCCH #1) in one slot. As in this example, a symbol gap may not be required (symbol gap is 0) between symbols of different SRIs in one PUCCH resource.

[0163] FIG. 12C corresponds to a case where UCI is transmitted using multiple SRIs (SRI#1, #2) in multiple PUCCH resources (PUCCH#1, #2) in one slot. In this example, a symbol of PUCCH#2 exists in a period within a symbol gap from the last symbol of PUCCH#1. In this case, the UE may assume that PUCCH#2 is not transmitted during a period of PUCCH#2 that overlaps with a symbol gap from PUCCH#1. Note that the UE may transmit PUCCH#2 during a period that does not overlap with a symbol gap (period after the symbol gap), or may drop (or cancel) the transmission of PUCCH#2.

[0164] According to the fourth embodiment described above, SRI switching can be performed by appropriately considering the symbol gap.

[0165] <Other> At least one of the above embodiments may be applied only to UEs that have reported or support a particular UE capability.

[0166] The specific UE capabilities may indicate at least one of the following: Whether to support PUCCH repetition; Supports intra-slot PUCCH repetition Maximum number of SRIs (or spatial relations) per PUCCH resource supported; · The maximum number of SRIs (or spatial relations) per slot (for PUCCH) that are supported.

[0167] Also, at least one of the above-mentioned embodiments may be applied when the UE is configured with specific information related to the above-mentioned embodiments by higher layer signaling. For example, the specific information may be information indicating enabling different spatial relationships for PUCCH transmission opportunities, information configuring the use of non-scheduling DCI, any RRC parameters for a specific release (e.g., Rel. 17), etc.

[0168] The method of notifying a TPC command / PRI for each PUCCH transmission opportunity as shown in the second and third embodiments may be applied to notifying an SRI for each PUCCH transmission opportunity. The TPC command, PRI, and the like in the second and third embodiments may be replaced with SRI.

[0169] In the second embodiment, at least one of UCI repetition and UCI encoding may be applied to multiple PUCCH transmission opportunities. In the third embodiment, it is preferable to use UCI repetition (UCI is encoded in units of PUCCH resources) for multiple PUCCH transmission opportunities in consideration of DCI detection errors.

[0170] In each embodiment, an example in which multiple PUCCH transmission opportunities in one slot are controlled using one or more DCIs has been shown, but this is not limited thereto. For example, when multiple PUCCH transmission opportunities across multiple slots are controlled using one or more DCIs, at least one of the contents of the above-mentioned embodiments may be applied. In this case, "within a slot" in the description may be read as "between slots," "within multiple slots," or the like, or "within a slot" may be deleted.

[0171] (Wireless communication systems) A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination of these methods.

[0172] 13 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0173] Furthermore, the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0174] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN) and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN and the LTE (E-UTRA) base station (eNB) is the SN.

[0175] The wireless communication system 1 may support dual connectivity between multiple base stations in the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0176] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged in the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located in at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as a base station 10.

[0177] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0178] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

[0179] 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).

[0180] The multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0181] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0182] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0183] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

[0184] The radio access scheme may be called a waveform. In the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0185] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as a downlink channel.

[0186] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0187] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0188] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information of at least one of the PDSCH and the PUSCH.

[0189] In addition, DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

[0190] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or multiple search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0191] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in the present disclosure may be read as interchangeable terms.

[0192] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0193] In the present disclosure, a downlink, an uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning of the channels.

[0194] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0195] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) may be called an SS / PBCH block, an SS Block (SSB), or the like. In addition, the SS, SSB, and the like may also be called a reference signal.

[0196] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may be called a user equipment specific reference signal (UE-specific reference signal).

[0197] (base station) 14 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.

[0198] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0199] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0200] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission and reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0201] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0202] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0203] The transmitting / receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0204] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0205] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0206] The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0207] The transceiver 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0208] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna .

[0209] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna .

[0210] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0211] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0212] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data) for the user terminal 20, control plane data, etc.

[0213] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0214] The transmitting / receiving unit 120 may transmit information specifying a plurality of pieces of spatial relation information (SRI) related to one physical uplink control channel (PUCCH) resource.

[0215] The control unit 110 may receive a plurality of PUCCH transmission opportunities in the PUCCH resource, each transmitted using a spatial domain transmit filter based on the plurality of spatial relationship information.

[0216] The transceiver 120 may also transmit information specifying a plurality of pieces of spatial relation information (SRI) relating to a plurality of physical uplink control channel (PUCCH) resources.

[0217] The control unit 110 may receive uplink control information in the multiple PUCCH resources transmitted using spatial domain transmit filters based on the multiple pieces of spatial relationship information, respectively.

[0218] (User terminal) 15 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0219] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0220] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0221] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission / reception unit 220.

[0222] The transmitting / receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitting / receiving unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting / receiving circuit, and the like, which are described based on common understanding in the technical field related to the present disclosure.

[0223] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0224] The transmitting / receiving antenna 230 can be composed of an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

[0225] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0226] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0227] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0228] The transceiver 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit sequence to be transmitted, and output a baseband signal.

[0229] Whether or not to apply the DFT process may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver 220 (transmission processor 2211) may perform the DFT process as the transmission process to transmit the channel using a DFT-s-OFDM waveform, and may not perform the DFT process as the transmission process if transform precoding is enabled for the channel.

[0230] The transceiver unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna 230.

[0231] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna 230.

[0232] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0233] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0234] In addition, the transmitting section and the receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0235] In addition, the control unit 210 may apply multiple pieces of spatial relation information (SRI) to one physical uplink control channel (PUCCH) resource.

[0236] The transceiver 220 may transmit multiple PUCCH transmission opportunities in the PUCCH resources using spatial domain transmit filters based on the multiple pieces of spatial relationship information, respectively.

[0237] The control unit 210 may apply the plurality of SRIs to the PUCCH resource in units of each hop of intra-frequency hopping.

[0238] The controller 210 may apply at least one of the plurality of SRIs to a plurality of hops of intra-frequency hopping for the PUCCH resource.

[0239] The control unit 210 may apply multiple pieces of spatial relation information (SRI) to multiple physical uplink control channel (PUCCH) resources.

[0240] The transceiver unit 220 may transmit uplink control information in the multiple PUCCH resources using spatial domain transmit filters based on the multiple pieces of spatial relationship information, respectively.

[0241] The transceiver 220 may transmit the same uplink control information (UCI repetition) in the multiple PUCCH resources.

[0242] The control unit 210 may assume that if the first downlink control information triggers one of the multiple PUCCH resources and the second downlink control information triggers the remaining of the multiple PUCCH resources, the second downlink control information does not schedule a downlink shared channel.

[0243] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically combined, or may be realized by using two or more devices that are physically or logically separated and directly or indirectly connected (for example, by wire, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0244] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission may be called a transmitting unit, a transmitter, and the like. In either case, as described above, the method of realization is not particularly limited.

[0245] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 16 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0246] In this disclosure, the terms "apparatus," "circuit," "device," "section," "unit," and the like can be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0247] For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processes may be performed by one processor, or the processes may be performed by two or more processors simultaneously, sequentially, or in other manners. Also, the processor 1001 may be implemented by one or more chips.

[0248] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0249] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0250] Moreover, the processor 1001 reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to the programs. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks may be realized in a similar manner.

[0251] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be called a register, a cache, a main memory (primary storage device), and the like. The memory 1002 can store a program (program code), a software module, and the like that is executable to implement a wireless communication method according to an embodiment of the present disclosure.

[0252] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0253] The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0254] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0255] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0256] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0257] (Modification) In addition, the terms explained in this disclosure and the terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be read as mutually interchangeable. A signal may also be a message. A reference signal may also be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applied standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, etc.

[0258] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0259] Here, the numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0260] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may also be a time unit based on numerology.

[0261] A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0262] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. A different name may be used for the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be read as interchangeable with each other.

[0263] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0264] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0265] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0266] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0267] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc.

[0268] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0269] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0270] In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. Each of one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0271] In addition, one or more RBs may be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0272] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0273] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a numerology on a carrier, where the common RBs may be identified by the index of the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0274] The BWP may include a UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0275] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given channel / signal outside the active BWP. Note that the terms "cell", "carrier", etc. in this disclosure may be replaced with "BWP".

[0276] The above-mentioned structures of radio frames, subframes, slots, minislots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

[0277] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0278] The names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0279] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0280] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via a plurality of network nodes.

[0281] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0282] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0283] The physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, by using a MAC Control Element (CE).

[0284] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0285] The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or by comparing numerical values ​​(e.g., with a predetermined value).

[0286] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0287] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0288] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0289] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," and the like may be used interchangeably.

[0290] In this disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0291] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0292] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0293] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0294] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may include a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0295] Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may be read as a side channel.

[0296] Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0297] In the present disclosure, an operation performed by a base station may be performed by its upper node in some cases. It is clear that in a network including one or more network nodes having base stations, various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0298] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be reordered unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0299] Each aspect / embodiment described in the present disclosure may be implemented using any of a wide variety of standards, including Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems using 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other appropriate wireless communication methods, next-generation systems that are based on these, etc. Also, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0300] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0301] Any reference to an element using a designation such as "first," "second," etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.

[0302] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, and the like.

[0303] A "determining" may also be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.

[0304] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. That is, "determination" may be considered to be "deciding" to perform some action.

[0305] Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

[0306] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0307] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples.

[0308] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0309] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0310] In this disclosure, where articles have been added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0311] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modified and altered forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the invention according to the present disclosure.

Claims

1. A control unit that applies a plurality of pieces of spatial relation information (SRI) to repeated transmission of a Physical Uplink Control Channel (PUCCH) for a plurality of transmission / reception points (TRPs) in one PUCCH resource to which frequency hopping within one slot is applied; A transmitting unit that repeatedly transmits the PUCCH using spatial domain filters based on the plurality of SRIs, A terminal, wherein Downlink Control Information (DCI) for scheduling a Physical Downlink Shared Channel (PDSCH) includes TPC command fields for the number of the plurality of SRIs.

2. The terminal according to claim 1 , wherein the control unit controls a transmission power of the repeated transmission of the PUCCH based on a transmit power control (TPC) related parameter set corresponding to the plurality of SRIs.

3. The terminal according to claim 1 , wherein the transmitting unit transmits capability information indicating that repeated transmission of the PUCCH within the one slot is supported.

4. applying a plurality of pieces of spatial relation information (SRI) to repeated transmission of a Physical Uplink Control Channel (PUCCH) for a plurality of transmission / reception points (TRPs) in one PUCCH resource to which frequency hopping within one slot is applied; and performing repeated transmission of the PUCCH using each of the spatial domain filters based on the plurality of SRIs; A wireless communication method for a terminal, in which Downlink Control Information (DCI) for scheduling a Physical Downlink Shared Channel (PDSCH) includes TPC command fields for the number of the plurality of SRIs.

5. A transmitter that transmits information specifying a plurality of pieces of spatial relation information (SRI) regarding repeated transmission of a PUCCH to a plurality of transmission / reception points (TRPs) in one Physical Uplink Control Channel (PUCCH) resource to which frequency hopping within one slot is applied; A receiving unit that receives the PUCCH repeatedly transmitted using spatial domain filters based on the plurality of SRIs, A base station, wherein Downlink Control Information (DCI) for scheduling a Physical Downlink Shared Channel (PDSCH) includes TPC command fields for the number of the plurality of SRIs.

6. A system having a terminal and a base station, The terminal includes a control unit that applies a plurality of spatial relation information (SRI) to repeated transmission of a PUCCH for a plurality of transmission / reception points (TRP) in one Physical Uplink Control Channel (PUCCH) resource to which frequency hopping within one slot is applied; A transmitting unit that repeatedly transmits the PUCCH using spatial domain filters based on the plurality of SRIs, The base station includes a transmitter for transmitting information designating the plurality of SRIs; A receiving unit that receives the PUCCH repeatedly transmitted by using each of the spatial domain filters, A system in which Downlink Control Information (DCI) that schedules a Physical Downlink Shared Channel (PDSCH) includes a TPC command field equal to the number of SRIs.

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