Terminal, wireless communication method, and base station

Abstract

A terminal according to an aspect of the present disclosure includes: a control unit that applies a plurality of spatial relation information (SRI) to one physical uplink control channel (PUCCH) resource; and a transmission unit that performs transmission of a plurality of PUCCH transmission opportunities in the PUCCH resource by using spatial domain transmission filters based on the plurality of spatial relation information, respectively. According to an aspect of the present disclosure, appropriate PUCCH retransmission can be achieved.

Description

Technical Field

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

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

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

[0004] Prior Art Documents

[0005] Non-Patent Documents

[0006] Non-Patent Document 1: 3GPP TS 36.300 V8.12.0 "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall Description; Stage 2 (Release 8)", April 2010 Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] In Rel.15 NR, a user terminal (user terminal, User Equipment (UE)) can also be set with spatial relation information related to the Physical Uplink Control Channel (PUCCH) (which can also be referred to as Spatial Relation Information (SRI)). In Rel-15 NR, control is performed so that at a certain time, for a PUCCH resource, a PUCCH SRI becomes active.

[0009] In NR, it is being studied that in order to improve the reliability of the PUCCH, the UE repeatedly transmits the PUCCH to multiple transmit-receive points. The repeated transmission of the PUCCH can also be referred to as PUCCH repetition.

[0010] However, if according to the NR specifications so far, different SRIs cannot be applied in PUCCH repetition, and the reception quality of the PUCCH cannot be effectively improved. In this case, for example, it is not possible to appropriately achieve spatial diversity gain, high-rank transmission, etc. in the case of using multiple transmit-receive points, and there is a concern that the increase in communication throughput is suppressed.

[0011] Therefore, one of the purposes of the present disclosure is to provide a terminal, a wireless communication method, and a base station capable of achieving appropriate repeated transmission of the PUCCH.

[0012] Means for Solving the Problem

[0013] The terminal according to one aspect of the present disclosure includes: a control unit that applies a plurality of spatial relation information (Spatial Relation Information (SRI)) to one Physical Uplink Control Channel (PUCCH) resource; and a transmission unit that performs transmission of a plurality of PUCCH transmission opportunities in the PUCCH resource by using spatial domain transmission filters based on the plurality of spatial relation information, respectively.

[0014] Effects of the Invention

[0015] According to one aspect of the present disclosure, appropriate repeated transmission of the PUCCH can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A And Figure 1B FIG. is an example of an SRI sequence according to the first embodiment.

[0017] Figure 2 It is a diagram showing an example where the number of spatial relationships representing a specific SRI sequence is limited.

[0018] Figure 3 It is a diagram showing an example of the spatial relationship corresponding to a PUCCH resource group.

[0019] Figure 4A And Figure 4B It is a diagram showing an example of the mapping of multiple SRIs related to the second embodiment sent to the PUCCH.

[0020] Figure 5 It is a diagram showing an example of the mapping of multiple SRIs related to the third embodiment sent to the PUCCH.

[0021] Figure 6 It is a diagram showing an example of a group of PUCCH resource sets with a common PUCCH transmission opportunity set in Embodiment 3.1.

[0022] Figure 7 It is a diagram showing an example of a group of PUCCH resource sets set for each PUCCH transmission opportunity in Embodiment 3.1.

[0023] Figure 8 It is a diagram showing an example of a group of PUCCH resource sets with a common PUCCH transmission opportunity set in Embodiment 3.2.

[0024] Figure 9 It is a diagram showing an example of a group of PUCCH resource sets set for each PUCCH transmission opportunity in Embodiment 3.2.

[0025] Figure 10 It is a diagram showing an example of using non-scheduled DCI in Embodiment 3.2.

[0026] Figure 11 It is a diagram showing an example of using scheduled DCI in Embodiment 3.2.

[0027] Figures 12A - 12C It is a diagram showing an example of the symbol gap related to the fourth embodiment.

[0028] Figure 13 It is a diagram showing an example of the schematic structure of a wireless communication system related to one embodiment.

[0029] Figure 14 It is a diagram showing an example of the structure of a base station related to one embodiment.

[0030] Figure 15 It is a diagram showing an example of the structure of a user terminal related to one embodiment.

[0031] Figure 16 This is a diagram showing an example of the hardware configurations of a base station and a user terminal according to an embodiment. Specific Embodiments

[0032] (Spatial relation information)

[0033] In NR, the UE controls the transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and coding) of at least one of the uplink signals and channels (also expressed as signal / channel) based on a specific spatial relation.

[0034] The spatial relation applied to a specific signal / channel can also be determined by using the spatial relation information (Spatial Relation Information (SRI)) notified (set) by using higher layer signaling.

[0035] In addition, in the present disclosure, the higher layer signaling can be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.

[0036] For example, MAC signaling can also use a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. Broadcast information can also be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0037] For example, in Rel-15 NR, the spatial relation information (the "PUCCH-SpatialRelationInfo" information element of RRC) between a specific reference signal (Reference Signal (RS)) and the uplink control channel (Physical Uplink Control Channel (PUCCH)) can also be included in the PUCCH configuration information (the "PUCCH-Config" information element of RRC) and set for the UE.

[0038] The specific RS may also be at least one of a Synchronization Signal Block (SSB), a Channel State Information-Reference Signal (CSI-RS), and a measurement reference signal (Sounding Reference Signal (SRS)).

[0039] The set SRI may also include an SRI Identifier (ID) for identifying the SRI. In addition, 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 above specific RS. In addition, the spatial relationship information may also include a serving cell index, a Bandwidth Part (BWP) ID, etc. corresponding to the above specific RS.

[0040] In addition, in the present disclosure, an index, an ID, an indicator, a resource ID, etc. may also be replaced with each other.

[0041] When the spatial relationship information related to the SSB or CSI-RS and the PUCCH is set, the UE may also use the same spatial domain filter as the spatial domain filter used for receiving the SSB or CSI-RS to transmit the PUCCH. That is, in this case, the UE may also be assumed that the UE reception beam of the SSB or CSI-RS is the same as the UE transmission beam of the PUCCH.

[0042] When the spatial relationship information related to the SRS and the PUCCH is set, the UE may also use the same spatial domain filter as the spatial domain filter used for transmitting the SRS to transmit the PUCCH. That is, in this case, the UE may also be assumed that the UE transmission beam of the SRS is the same as the UE transmission beam of the PUCCH.

[0043] In addition, the spatial domain filter for the transmission of the base station, the downlink spatial domain transmission filter, and the transmission beam of the base station may also be replaced with each other. The spatial domain filter for the reception of the base station, the uplink spatial domain receive filter, and the reception beam of the base station may also be replaced with each other.

[0044] In addition, the spatial domain filter for UE transmission, uplink spatial domain transmission filter, and UE transmission beam can also be replaced with each other. The spatial domain filter for UE reception, downlink spatial domain receive filter, and UE reception beam can also be replaced with each other.

[0045] The UE can also be configured with SRI on a per PUCCH configuration (PUCCH-Config) basis. The SRI configured through the PUCCH configuration can also be applied to all PUCCH resources configured through that PUCCH configuration.

[0046] In the case where more than one PUCCH-related SRI is configured, the UE can also be controlled based on the PUCCH spatial relation Activation / Deactivation MAC CE to activate one PUCCH SRI for one PUCCH resource at a certain time.

[0047] (Multi-TRP)

[0048] In NR, research is being conducted on UL transmission (e.g., PUCCH transmission) by the UE to one or more Transmission / Reception Points (TRPs) (Multi-TRP (M-TRP)).

[0049] As an example, research is being conducted to improve the reliability of the PUCCH for use cases (or services) for ultra-reliable and low-latency (e.g., Ultra Reliable and Low Latency Communications (URLLC)) by applying different SRIs to the repeated transmission of the PUCCH for multi-TRP. The repeated transmission of the PUCCH can also be referred to as PUCCH repetition. The repeated transmission can also be abbreviated as repetition.

[0050] In addition, the SRI can also correspond to a beam. For example, the UE can also be assumed to transmit PUCCHs with different SRIs using different beams.

[0051] Based on the repeated transmission of PUCCH, improved reception quality at the network side can be expected for PUCCH. However, in the current Rel.15 / 16 NR, for repeated PUCCH transmission, only the application of the same spatial relation is allowed.

[0052] Therefore, if following the NR specifications to date, different SRIs cannot be applied in PUCCH repetition, and the reception quality of PUCCH cannot be effectively improved. In this case, spatial diversity gain, high-rank transmission, etc. in the case of using multiple TRPs cannot be appropriately achieved, and there is a concern that the increase in communication throughput is suppressed.

[0053] Therefore, the inventors of the present invention have conceived a method for implementing appropriate PUCCH repeated transmission. In one aspect of the present disclosure, for example, for PUCCH repetition using different spatial relations, the UE can appropriately determine the number of repetitions.

[0054] Hereinafter, embodiments related to the present disclosure will be described in detail with reference to the drawings. The wireless communication methods related to each embodiment can be applied separately or in combination.

[0055] In addition, in the present disclosure, "A / B" may also mean "at least one of A and B".

[0056] In addition, in the present disclosure, activation, deactivation, indication (or designation), selection, configuration, update, determination, etc. may also be replaced with each other. Further, in the present disclosure, sequences, lists, sets, groups, clusters, subsets, etc. may also be replaced with each other.

[0057] In the present disclosure, a panel, a beam, a panel group, a beam group, an uplink (UL) transmission entity, a TRP, spatial relation information (SRI), a spatial relation, a control resource set (CORESET), a physical downlink shared channel (PDSCH), a codeword, a 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), a spatial relation group, a downlink TCI state (DL TCI state), an uplink TCI state (UL TCI state), a unified TCI state, etc. may also be replaced with each other.

[0058] In addition, for a single DCI, the i-th TRP (TRP#i) may also mean the i-th TCI state, the i-th CDM group, etc. (i is an integer).

[0059] In addition, for multiple DCIs, the i-th TRP (TRP#i) may also mean the CORESET corresponding to the CORESET pool index = i, the i-th TCI state, the i-th CDM group, etc. (i is an integer).

[0060] A panel (plane) may also 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 a group-based beam report.

[0061] In addition, a panel identifier (ID) and a panel may also be replaced with each other. That is, a TRP ID and a TRP, a CORESET group ID and a CORESET group, etc. may also be replaced with each other.

[0062] In the present disclosure, an index, an ID, an indicator, a resource ID may also be replaced with each other. In the present disclosure, a list, a group, a cluster, a subset, etc. may also be replaced with each other.

[0063] In the present disclosure, the description abbreviated as "spatial relation" may also be replaced with the spatial relation of a PUCCH.

[0064] The PUCCH repetitions of the present disclosure can also be interchanged with MTRP-based repetitions, Rel. 17 repetitions, repetitions applying different spatial relations, etc. In addition, in the following example, the PUCCH is described as the PUCCH used for transmitting Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) for PDSCH, but it can also be the PUCCH for transmitting at least one of UCI such as HARQ-ACK, SR, CSI (e.g., aperiodic CSI), and can also be replaced in this way.

[0065] In addition, multiple spatial relations (SRI) in the present disclosure can also be interchanged with SRI sequences, sets of SRI, SRI patterns, SRI applied to PUCCH repetitions, etc.

[0066] (Wireless communication method)

[0067] <First Embodiment>

[0068] In the first embodiment, the UE can also determine the number of PUCCH repetitions based on the number of configured / activated / specified spatial relations (e.g., the number of SRI included in the SRI sequence).

[0069] The UE can also be configured with the SRI applied to the PUCCH repetitions by RRC signaling in a manner that spans the SRI sequence of the PUCCH repetitions.

[0070] In addition, in the present disclosure, SRI can also be interchanged with the spatial relation information (SRI) of the PUCCH, the RRC parameter "Spatialrelationinfo", the SRI ID, etc. In addition, in the present disclosure, the SRI sequence can also be interchanged with the sequence of SRI applied to the PUCCH repetitions, the set of SRI, the SRI pattern, etc.

[0071] The UE can also be configured with a specific number (e.g., M) of SRI sequences by RRC signaling. Here, the specific number M can be, for example, 8, 64, etc., or greater than 64.

[0072] When multiple SRI sequences are configured, the UE can further activate one or more SRI sequences (subsets of the SRI sequence) using MAC CE. The maximum number of activated SRI sequences can also be restricted to a specific number (e.g., 8).

[0073] It can also be specified to be one of the activated SRI sequences based on DCI. For example, the UE can also determine one of the activated SRI sequences as the sequence to be used in the PUCCH repetition based on a specific field of the DCI and specific parameters (or information) related to the DCI.

[0074] Here, the specific field can be either a PUCCH resource indicator (PUCCH Resource Indicator (PRI)) field, an SRI field, a transmission configuration indication (TCI) field, other fields, etc., or can be expressed by a combination of multiple fields.

[0075] The PRI field is included in the DCI scheduling the PDSCH and is equivalent to the information specifying the PUCCH resource for sending the HARQ-ACK corresponding to the PDSCH.

[0076] The SRI field can also be a field specifying the spatial relationship of the PUCCH. When the SRI field is set to exist (be included) in the DCI by higher layer signaling, it can also be included in the DCI.

[0077] The TCI field can be either a field representing the TCI state of the scheduled PDSCH or a UL TCI field representing the UL TCI state for PUCCH transmission.

[0078] Other fields can also be, for example, fields for controlling the PUCCH (e.g., a field called the PUCCH Control field). When the PUCCH control field is set to exist (be included) in the DCI by higher layer signaling, it can also be included in the DCI.

[0079] The above specific parameters can also include at least one of the time resource, frequency resource, control channel element (Control Channel Element (CCE)) index, physical resource block (Physical Resource Block (PRB)) index, resource element (Resource Element (RE)) index, search space index, control resource set (Control Resource Set (CORESET)) index, CORESET pool index, and aggregation level of the (detected) DCI (or corresponding to the DCI or for reception). In other words, the above specific parameters are equivalent to an implicit notification using the DCI.

[0080] Figure 1A and Figure 1B is a diagram showing an example of the SRI sequence related to the first embodiment. Figure 1A Shows the value of the SRI field included in the DCI and the corresponding SRI sequence. The SRI field is 3 bits in this example, but the number of bits is not limited to this.

[0081] In addition, hereinafter, in the present disclosure, the case where the SRI sequence is specified by the SRI field is taken as an example for explanation, but it is not limited thereto. The specification of the SRI sequence based on the SRI field described later can also be replaced by the specification of the SRI sequence based on at least one of the above specific fields and specific parameters. In the present disclosure, the fields listed in the above specific fields can also be replaced with each other.

[0082] In Figure 1A , different SRI sequences (first to eighth SRI sequences) are specified according to the value of the SRI field. It can also be assumed that the SRI sequence IDs activated by the UE through the MAC CE correspond to the values of the respective SRI fields in ascending or descending order. That is, it can also be assumed that when the IDs of the activated multiple SRI sequences and the values of the SRI fields are arranged in ascending or descending order, they correspond one-to-one from smallest to largest.

[0083] Figure 1B is a diagram showing the correspondence between the SRI sequence ID and the corresponding SRI sequence (a set of SRIs). This correspondence can also be set / activated by higher-layer signaling.

[0084] 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}. In addition, in the present disclosure, for simplicity, SRI ID #x is represented as SRI#x and simply represented as #x.

[0085] As described above, the SRI sequence can also represent the SRI applied to each repetition of the PUCCH repetition. For example, in Figure 1A where the i-th SRI sequence corresponds to Figure 1B and the SRI sequence ID = i + 1, it can also be assumed that the UE specified with the SRI field = 000 has a PUCCH repetition count of 4, and applies SRI#1, #2, #3, #4 to transmit the 1st, 2nd, 3rd, and 4th times of the PUCCH repetition, respectively.

[0086] In addition, it can also be assumed that the UE specified with the SRI field = 100 has a PUCCH repetition count of 2, and applies SRI#1, #2 to transmit the 1st and 2nd times of the PUCCH repetition, respectively.

[0087] In addition, a UE assigned an SRI field value of 111 can also be assumed to have a PUCCH repetition count of 1 (assigned PUCCH transmission without repetition), and apply SRI #1 to transmit the PUCCH.

[0088] In addition, in the present disclosure, PUCCH repeated transmission using different spatial relationships can also be replaced with PUCCH repeated transmission using a precoder cycle.

[0089] According to the first embodiment described above, it is possible to appropriately determine the number of repetitions and perform PUCCH repeated transmission.

[0090] <Modification Example of the First Embodiment>

[0091] The number of (configurable) spatial relationships associated with a part of the SRI field values (or SRI sequence ID values) can also be restricted compared to other SRI field values (or SRI sequence ID values).

[0092] For example, the number of spatial relationships associated with a part of the SRI field values (or SRI sequence ID values) does not necessarily have to be restricted to a specific value (e.g., 1 or 2) (there is no particular restriction on other SRI field values (or SRI values)). In the case where it is desired to specify PUCCH transmission without repetition, it is only necessary to assign to the UE an SRI field / SRI sequence ID value for which the number of spatial relationships is restricted to 1. In this way, by setting a restriction on the number of spatial relationships, it is possible to appropriately suppress an increase in signaling overhead for SRI / SRI sequence setting.

[0093] Figure 2 It is a diagram showing an example in which the number of spatial relationships representing a specific SRI sequence is restricted. In this example, the number of spatial relationships associated with SRI sequence ID = 0 is restricted to 1. The SRI corresponding to SRI ID #x_1 can be determined in advance by a specification, set in the UE by higher layer signaling, or determined based on UE capabilities.

[0094] <Second Modification Example of the First Embodiment>

[0095] It is being studied that in NR after Rel.16, a PUCCH resource group is introduced, and control for specifying / updating multiple spatial relationships is performed for each group.

[0096] Figure 3 It is a diagram showing an example of spatial relationships corresponding to a PUCCH resource group. In this example, values from PRI = 0 to 7 respectively correspond to PUCCH resources 1 - 8, PUCCH resources 1 - 4 correspond to group 1, and PUCCH resources 5 - 8 correspond to group 2.

[0097] Here, a spatial relation (SRI#1) is set in group 1 and two spatial relations (SRI#1, #2) are set in group 2 through high-layer signaling (e.g., RRC, MAC CE).

[0098] In the first embodiment, as described above, the UE can also determine the number of repetitions of the PUCCH based on the number of spatial relations set / activated / specified. In Figure 3 the example, if the PUCCH resource belonging to group 1 is specified by the PRI, the UE performs PUCCH transmission with a repetition number of one (no repetition), and if the PUCCH resource belonging to group 2 is specified by the PRI, the UE performs PUCCH transmission with a repetition number of 2.

[0099] <Second Embodiment>

[0100] In the second embodiment, the UE uses multiple SRIs to transmit UCI in one PUCCH resource within one time slot. The multiple SRIs can also be given as described in the first embodiment.

[0101] Figure 4A And Figure 4B is a diagram showing an example of the mapping of multiple SRIs related to the second embodiment to PUCCH transmission. In this example, one PUCCH resource using N symbols within one time slot is illustrated. This PUCCH resource is applied with intra-frequency hopping. The first frequency hopping has a time length of Floor(N / 2) symbols, and the second frequency hopping has a time length of N - Floor(N / 2) symbols. Additionally, Floor(X) is the value obtained by applying the floor function to X.

[0102] It is considered that multiple SRIs (SRI#1, #2) are determined to be used in this PUCCH transmission. Figure 4A An example of mapping SRIs in units of each frequency hopping of intra-frequency hopping is shown. In this case, the symbol boundaries of SRI#1 and SRI#2 become the frequency hopping boundaries and can be uniquely determined.

[0103] The UE can, for example, also allocate the first SRI to one of the first frequency hopping and the second frequency hopping, and allocate the second SRI to the other of them.

[0104] Figure 4BAn example of mapping the SRI in units of symbols of the PUCCH resource is shown. In this example, the UE applies SRI #1 with the number of symbols starting from the first symbol among N symbols that is greater than Floor(N / 2), and then applies SRI #2. In this case, the UE allocates the first SRI (across multiple frequency hops) to both the first frequency hop and the second frequency hop, and allocates the second SRI to the second frequency hop. Conversely, the number of symbols of SRI #1 can also be less than the number of symbols of SRI #2.

[0105] For example, the UE can also be notified of the positions of the symbol boundaries of SRI #1 and SRI #2 through higher layer signaling, physical layer signaling, or a combination thereof. The UE can also be notified of a bitmap indicating which of SRI #1 and SRI #2 is applied in each symbol through higher layer signaling, physical layer signaling, or a combination thereof.

[0106] The symbol unit here considers a trade-off between flexibility and signaling overhead, and can also be replaced with a symbol set unit (e.g., a 2-symbol unit).

[0107] Figure 4B The mapping of can perform a more flexible SRI allocation than the mapping of Figure 4A For example, it can also be mapped such that the time length of a more preferred beam (SRI) increases.

[0108] The UE can also, for example, allocate the first SRI to a PUCCH transmission opportunity with a small starting symbol number, and allocate the second SRI to a PUCCH transmission opportunity with a large starting symbol number. In addition, in the present disclosure, a PUCCH transmission opportunity can also mean a PUCCH (or the resource of the PUCCH or the time resource of the PUCCH) to which the same SRI is applied.

[0109] [TPC]

[0110] The transmit power control (TPC) associated parameters (e.g., TPC command, α, P0, Pathloss Reference Signal (PL-RS)) for each PUCCH transmission opportunity are described.

[0111] In the case where α, P0, and PL-RS set through higher layer signaling are set together / associated with / corresponding to the spatial relationship (SRI), even if different SRIs are applied for each PUCCH transmission opportunity, the parameters for each PUCCH transmission opportunity are appropriately allocated.

[0112] In the DCI for scheduling PDSCH (e.g., DCI format 1_1) (which may also be referred to as DL allocation DCI), a TPC command field for each PUCCH transmission opportunity (in other words, the number of SRIs) may also be included. According to this structure, the TPC for the PUCCH transmission opportunity corresponding to each SRI can be appropriately controlled.

[0113] In the above DCI, a single TPC command field indicating the TPC command for each PUCCH transmission opportunity may also be included. According to this structure, an increase in the size of the DCI can be suppressed.

[0114] The UE may also apply the specified single TPC command equally to each PUCCH transmission opportunity.

[0115] The UE may also be controlled to apply the specified single TPC command to a specific PUCCH transmission opportunity (e.g., the first PUCCH transmission opportunity), and no TPC command is notified for other PUCCH transmission opportunities (the correction value based on TPC = 0 or closed-loop power control is not applied).

[0116] The UE may also interpret the TPC command field of the above DCI as the TPC command field for each PUCCH transmission opportunity. For example, when the TPC command field is 2 bits, the UE may also determine that the first half bit (1 bit in this example) represents the TPC command field for the PUCCH transmission opportunity corresponding to the first SRI, and the second half bit (1 bit in this example) represents the TPC command field for the PUCCH transmission opportunity corresponding to the second SRI. In addition, the first half bit and the second half bit may be the same number of bits or different numbers of bits.

[0117] This 1 bit may, for example, also correspond to a correction value of +1 or -1 for the TPC command. The value of this correction value may be determined in advance by the specification or set by higher layer signaling. The value of this correction value may be set / stipulated for each PUCCH transmission opportunity or may be set / stipulated as a common value for all PUCCH transmission opportunities.

[0118] In addition, the UE may also determine that a bit string with a specific bit (e.g., '0', '1') or bit string appended before or after the above first half bit represents the TPC command field for the PUCCH transmission opportunity corresponding to the first SRI. Furthermore, the UE may also determine that a bit string with a specific bit (e.g., '0', '1') or bit string appended before or after the above second half bit represents the TPC command field for the PUCCH transmission opportunity corresponding to the second SRI.

[0119] The UE can also determine the correction value of the TPC command for each PUCCH transmission opportunity based on the correspondence between the value of a specified TPC command field and the correction value of the TPC command for each PUCCH transmission opportunity. This correspondence can be predefined by the specification, set in the UE through higher-layer signaling, specified by DCI, or determined based on the UE's capabilities. With this structure, it is possible to suppress the increase in the size of DCI and appropriately and flexibly indicate the TPC commands for each PUCCH transmission opportunity.

[0120] [Phase continuity]

[0121] In the existing Rel.15 / 16 NR specification, when in-slot in-band hopping for PUCCH is activated by a higher-layer parameter, the channel for transmitting the symbols of the antenna port for uplink transmission can also be estimated based on the channels for transmitting other symbols of the same antenna port, but it is specified that this is only applicable when the two symbols correspond to the same frequency hopping (regardless of whether the frequency hopping distance is zero).

[0122] In other words, in the existing specification, phase continuity within the same frequency hopping in the same time slot (the channel estimation results of consecutive symbols can be utilized).

[0123] In the second embodiment, the following provisions can also be introduced:

[0124] · When in-slot in-band hopping for PUCCH is activated by a higher-layer parameter, the channel for transmitting the symbols of the antenna port for uplink transmission can also be estimated based on the channels for transmitting other symbols of the same antenna port, but the two symbols are only applicable when they correspond to the same SRI (regardless of whether the two symbols correspond to frequency hopping).

[0125] In the second embodiment, when multiple SRIs are allocated in one PUCCH resource, it can also be assumed that there is phase continuity within the PUCCH transmission opportunity corresponding to one SRI (any two symbols within this PUCCH transmission opportunity can utilize each other's channel estimation results). With this structure, in Figure 4B the PUCCH transmission opportunities across different frequency hops within the same time slot as shown, when the same SRI is applied, the channel estimation results in the symbols within the PUCCH transmission opportunity can be appropriately utilized.

[0126] According to the second embodiment described above, it is possible to appropriately implement repeated transmissions applying different SRIs based on a single DCI.

[0127] <Third Embodiment>

[0128] In the third embodiment, the UE uses multiple SRIs to transmit UCI in multiple PUCCH resources in one time slot. The multiple SRIs may also be given as described in the first embodiment.

[0129] UCI can also be encoded separately in each PUCCH resource. That is, the same UCI can also be sent through each of the above multiple PUCCHs. This operation can also be called UCI repetition. In the case of UCI repetition, if the base station can receive one of the PUCCH resources, it can decode the UCI.

[0130] UCI may also be encoded across the above-mentioned multiple PUCCH resources. That is, one UCI may also be divided into the above-mentioned multiple PUCCH resources and sent. This operation may also be referred to as UCI encoding across multiple PUCCH resources. In the case of UCI encoding across multiple PUCCH resources, the base station preferably receives both PUCCH resources for decoding. If both PUCCH resources can be received with a certain quality or above, it is possible to expect improved characteristics.

[0131] Figure 5 This is a diagram showing an example of mapping multiple SRIs involved in the third embodiment to PUCCH. In this example, two PUCCH resources (PUCCH resources #1 and #2) are illustrated in one time slot. For simplicity, each PUCCH resource does not apply intra-frequency hopping, but it can also apply intra-frequency hopping. The UE can also apply different SRIs (SRI#1, SRI#2) to PUCCH resource #1 and PUCCH resource #2, respectively.

[0132] In addition, for the combination of the formats of two PUCCHs transmitted by applying different SRIs in a time slot, it can be assumed that there is no restriction or at least one of the following restrictions exists:

[0133] A combination of a short PUCCH format and a short PUCCH format that is prohibited (unexpected) or allowed for a shorter duration,

[0134] The combination of short PUCCH format and long PUCCH format with longer duration is prohibited (not expected) or allowed,

[0135] • A combination of long PUCCH format and long PUCCH format is prohibited (not expected) or allowed.

[0136] In addition, a short PUCCH format can also be, for example, PUCCH format 0 or 2 with a time length of 1 or 2 symbols. In addition, a long PUCCH format can also be, for example, PUCCH format 1, 3, or 4 with a time length of 4 symbols or more. The definition is not limited to this. As long as the time length of the long PUCCH format is longer than that of the short PUCCH format.

[0137] Hereinafter, a case where two PUCCHs transmitted by applying different SRIs within a time slot are triggered by one DCI (single DCI) (Embodiment 3.1) and a case where they are triggered by different DCIs (multi-DCIs) respectively (Embodiment 3.2) will be described.

[0138] [Embodiment 3.1]

[0139] In Embodiment 3.1, the TPC association parameter for each PUCCH transmission opportunity (in the third embodiment, the PUCCH transmission opportunity corresponds to the PUCCH resource) can also be set / specified in the same manner as described in the first embodiment.

[0140] Hereinafter, the PRI field in Embodiment 3.1 will be described.

[0141] In the DCI (e.g., DCI format 1_1) that schedules the PDSCH (which can also be referred to as the DL allocation DCI), a PRI field for each PUCCH transmission opportunity (in other words, the number of SRIs) can also be included. According to this structure, the PUCCH resources for the PUCCH transmission opportunities corresponding to each SRI can be appropriately controlled.

[0142] In the above DCI, a single PRI field indicating the PUCCH resources of each PUCCH transmission opportunity can also be included. According to this structure, an increase in the size of the DCI can be suppressed.

[0143] The UE can also determine the PUCCH resources for a specific PUCCH transmission opportunity (e.g., the first PUCCH transmission opportunity) based on the specified single PRI field, and determine the PUCCH resources for other PUCCH transmission opportunities based on a specific rule.

[0144] The UE can also determine that the PUCCH resources for the other PUCCH transmission opportunities are located at a position obtained by adding a specific time / frequency offset to the PUCCH resources of the first PUCCH transmission opportunity. This specific time / frequency offset can be determined in advance by the specification, set in the UE by high-layer signaling, or determined based on the UE capability.

[0145] The UE may also determine that the PUCCH resource for this other PUCCH transmission opportunity corresponds to the value obtained by adding or subtracting an offset from the value in the specified PRI field above (or the remainder obtained by dividing this value by the number of values that the PRI field can take). For example, when the offset is '2' and the value of a specified PRI field is '1', it may also be determined that the value of the PRI field notified for this other PUCCH transmission opportunity is 3 (= 1 + 2) to determine the PUCCH resource. This offset may be determined in advance by the specification, may be set for the UE by higher layer signaling, or may be determined based on the UE capability.

[0146] The UE may also interpret the PRI field of the above DCI as representing the PRI fields of respective PUCCH transmission opportunities. For example, when the PRI field is 2 bits, the UE may also determine that the first half bit (1 bit in this example) represents the PRI field of the PUCCH transmission opportunity corresponding to the first SRI, and the second half bit (1 bit in this example) represents the PRI field of the PUCCH transmission opportunity corresponding to the second SRI. In addition, the first half bit and the second half bit may be the same number of bits or different numbers of bits.

[0147] 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 the specification or may be set by higher layer signaling. This correspondence may be set / stipulated for each PUCCH transmission opportunity or may be set / stipulated commonly for all PUCCH transmission opportunities.

[0148] In addition, the UE may determine that a bit string with a specific bit (e.g., '0', '1') or bit string appended before or after the above first half bit represents the PRI field of the PUCCH transmission opportunity corresponding to the first SRI. Furthermore, the UE may determine that a bit string with a specific bit (e.g., '0', '1') or bit string appended before or after the above second half bit represents the PRI field of the PUCCH transmission opportunity corresponding to the second SRI.

[0149] The UE may also determine the PUCCH resources for respective PUCCH transmission opportunities based on the correspondence between the value of a specified PRI field and the PUCCH resources (or PRI values) of respective PUCCH transmission opportunities. This correspondence may be stipulated in advance by the specification, may be set for the UE by higher layer signaling, may be specified by DCI, or may be determined based on the UE capability. With this structure, an increase in the size of the DCI can be suppressed, and the PUCCH resources for respective PUCCH transmission opportunities can be indicated appropriately and flexibly.

[0150] In addition, the UE can be configured with a common PUCCH resource set for PUCCH transmission opportunities through a higher layer, or can be configured with a PUCCH resource set for each PUCCH transmission opportunity through a higher layer. The UE can also determine the PUCCH resources for each PUCCH transmission opportunity based on at least one of the PRI field for each PUCCH transmission opportunity as described above and a common PRI field for PUCCH transmission opportunities. The PUCCH resource set referred to for the determination of PUCCH resources can be used sequentially (switched) for each PUCCH transmission opportunity, or can be determined based on the CORESET pool index of the detected DCI's CORESET.

[0151] Figure 6 FIG. is an example of a group showing a PUCCH resource set common to PUCCH transmission opportunities configured in Embodiment 3.1. In this example, the UE is configured with a group of PUCCH resource sets composed of PUCCH resource sets 1, 2,... in common (without distinguishing PUCCH transmission opportunities) in PUCCH transmission opportunities. In addition, TRP1 and 2 in the figure are conceptual illustrations, and they can also be the same TRP.

[0152] In addition, in the present disclosure, the PUCCH resource set i can also be defined such that the larger the size of the UCI bits, the larger the i used, but it is not limited thereto. In addition, an example is shown in which the number of PUCCH resources included in one PUCCH resource set is 8, but it is not limited thereto.

[0153] In addition, in the following examples, an example is shown in which the HARQ-ACK transmission is sent using the PUCCH resources of the PUCCH resource set 2 (that is, the PUCCH resource set 2 is selected based on the size of the UCI), but it is not limited thereto.

[0154] As Figure 6 As shown on the right side of, in the PUCCH resource set 1, PUCCH resources 1 to 8 are configured corresponding to DCI (PRI field (PRI#1 or PRI#2 field), the same in the following drawings) = 000 to 111. In the PUCCH resource set 2, PUCCH resources 11 to 18 are configured corresponding to DCI = 000 to 111.

[0155] As Figure 6 As shown in the upper left of, the UE receives DCI1 indicating the PDSCH of TRP1 and transmits HARQ1 (HARQ-ACK) corresponding to the PDSCH. Here, the PUCCH resources for HARQ1 can also be specified by the PRI#1 and PRI#2 fields of DCI1. Here, an example is shown in which the PRI#1 field of DCI1 is 010, the PRI#2 field is 000, and based on Figure 6For the table on the right, the PUCCH resource for the first PUCCH transmission opportunity (applying SRI for TRP1) of the UE is Resource 13, and the PUCCH resource for the second PUCCH transmission opportunity (applying SRI for TRP2) of the UE is Resource 11.

[0156] Figure 7 This is an example of a diagram showing a set of PUCCH resources set for each PUCCH transmission opportunity in Embodiment 3.1. In this example, for each PUCCH transmission opportunity of the UE, a set of PUCCH resources consisting of PUCCH resource sets 1, 2,... is set.

[0157] As Figure 7 As shown in the upper right of , in PUCCH resource set 1 for the first PUCCH transmission opportunity, PUCCH resources 1-1 to 1-8 are set 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 set corresponding to DCI = 000 to 111.

[0158] As Figure 7 As shown in the lower right of , in PUCCH resource set 1 for the second PUCCH transmission opportunity, PUCCH resources 2-1 to 2-8 are set corresponding to DCI = 000 to 111. In PUCCH resource set 2 for the second PUCCH transmission opportunity, PUCCH resources 2-11 to 2-18 are set corresponding to DCI = 000 to 111.

[0159] As Figure 7 As shown in the upper left of , the UE receives DCI1 indicating the PDSCH of TRP1 and sends HARQ1 (HARQ-ACK) corresponding to this PDSCH. Here, the PUCCH resource for HARQ1 can also be specified by the PRI#1 and PRI#2 fields of DCI1. Here, the following example is shown: the PRI#1 field of DCI1 is 000, the PRI#2 field is 000, based on Figure 7 For the table on the right, the PUCCH resource for the first PUCCH transmission opportunity (applying SRI for TRP1) of the UE is Resource 1-11, and the PUCCH resource for the second PUCCH transmission opportunity (applying SRI for TRP2) of the UE is Resource 2-11.

[0160] [Embodiment 3.2]

[0161] In Embodiment 3.2, a TPC command, PRI, etc. that specify a PUCCH transmission opportunity for TRP#1 can also be used with DCI for TRP#1 (e.g., DCI detected through a CORESET corresponding to a CORESET pool index = 0). In addition, a TPC command, PRI, etc. that specify a PUCCH transmission opportunity for TRP#2 can also be used with DCI for TRP#2 (e.g., DCI detected through a CORESET corresponding to a CORESET pool index = 1).

[0162] At least one of these DCIs (multi-DCIs) (e.g., the first DCI) can also be used for scheduling a PDSCH. For a PUCCH for transmitting a HARQ-ACK for the above PDSCH scheduled by the first DCI, another DCI (e.g., the second DCI) not used for scheduling the PDSCH can also be used for notifying a PUCCH resource, a TPC command, etc.

[0163] The first DCI and the second DCI can be either the same DCI format (e.g., DCI format 1_1), different DCI formats, or can have a Cyclic Redundancy Check (CRC) scrambled with different Radio Network Temporary Identifiers (RNTIs).

[0164] In addition, the UE can also be configured by higher layers with a common PUCCH resource set for PUCCH transmission opportunities, or can be configured by higher layers with a PUCCH resource set for each PUCCH transmission opportunity. The PUCCH resource set referred to for PUCCH resource determination can be used sequentially (switched) for each PUCCH transmission opportunity, or can be determined based on the CORESET pool index of the CORESET in which the DCI is detected.

[0165] Figure 8 FIG. is an example of a group showing a PUCCH resource set common to PUCCH transmission opportunities set in Embodiment 3.2. Figure 9 FIG. is an example of a group showing a PUCCH resource set for each PUCCH transmission opportunity set in Embodiment 3.2. Figure 8 Similar to the example of Figure 6 , Figure 9 Similar to the example of Figure 7 , the differences are as follows.

[0166] The UE detects DCI #1 from TRP #1 (e.g., the CORESET with CORESET pool index = 0), and detects DCI #2 from TRP #2 (e.g., the CORESET with CORESET pool index = 1). The PDSCH is scheduled by at least one of DCI #1 and DCI #2. The PRI #1 field of DCI #1 represents the PUCCH resource for the first PUCCH transmission opportunity (applying the SRI for TRP1), and the PRI #2 field of DCI #2 represents the PUCCH resource for the second PUCCH transmission opportunity (applying the SRI for TRP2).

[0167] [[DCI that does not schedule PDSCH]]

[0168] Describe the DCI that triggers the PUCCH resource for sending HARQ-ACK for the PDSCH scheduled by other DCI, that is, the DCI not used for scheduling the PDSCH (e.g., the second DCI above). Hereinafter, in the present disclosure, this DCI is referred to as non-scheduling DCI, PUCCH trigger dedicated DCI, etc.

[0169] Even if the UE that detects the non-scheduling DCI assumes that the non-scheduling DCI contains information for scheduling the PDSCH, it may neither receive the PDSCH nor send HARQ-ACK for the PDSCH. The UE that detects the non-scheduling DCI may also use the PUCCH resource, TPC command, etc. indicated by the non-scheduling DCI to send HARQ-ACK for the PDSCH scheduled by other DCI (e.g., the first DCI above) (or the aperiodic CSI report triggered by the other DCI).

[0170] The fields included in the non-scheduling DCI may include a HARQ process number field representing the same HARQ process number (or HARQ process ID) as that represented by the above other DCI, or an NDI field having the same value of the new data indicator (New Data Indicator (NDI)) as that represented by the above other DCI. The non-scheduling DCI may also not include information capable of judging scheduling (e.g., frequency domain resource allocation field, time domain resource allocation field, etc.).

[0171] When the detected DCI satisfies at least one of the following conditions, the UE may also determine that the DCI is a non-scheduling DCI:

[0172] · A specific field of the DCI is a specific value,

[0173] · The DCI is detected through a specific CORESET.

[0174] The "specific field has a specific value" can also be equivalent to at least one of "the HARQ process number field is the same as other DCIs" and "the NDI field is the same as other DCIs".

[0175] The above-mentioned specific CORESET can also be equivalent to at least one of a CORESET that is the same as the CORESET of other detected DCIs, a CORESET that is different from the CORESET of other detected DCIs, a CORESET corresponding to the CORESET pool index that is the same as the CORESET of other detected DCIs, and a CORESET corresponding to the CORESET pool index that is different from the CORESET of other detected DCIs.

[0176] It can also be defined as the receivable period of non-scheduled DCI. The UE can also assume that for the DCI detected during this receivable period, it can be determined as non-scheduled DCI, and for DCI that is not like this, it cannot be determined as non-scheduled DCI. In this way, if the receivable period of non-scheduled DCI is defined, it can be appropriately distinguished from the DCI used for retransmission of the normal PDSCH.

[0177] This receivable period can also be equivalent to at least one of the following:

[0178] · The period from after the reception symbol (the last received symbol) of other DCI to the start reception symbol of the PDSCH scheduled by this other DCI,

[0179] · The period from after the reception symbol of other DCI to the end reception symbol (the last symbol) of the PDSCH scheduled by this other DCI,

[0180] · The period from after the reception symbol of other DCI to the start transmission symbol of the PUCCH triggered by this other DCI,

[0181] · The period from after the reception symbol of other DCI to the end transmission symbol of the PUCCH triggered by this other DCI.

[0182] In addition, a part or all of the symbols in the above description of this receivable period can also be replaced with other time units (for example, time slot, sub-time slot, sub-frame, frame, etc.). For example, the last-listed example can also be replaced with "the period from after the reception symbol of other DCI to the end time slot of the PUCCH triggered by this other DCI".

[0183] In the case of using the above UCI repeatedly (the same UCI is transmitted in the PUCCH corresponding to other DCIs and the PUCCH corresponding to non-scheduled DCI) and in the case of UCI encoding over the above-mentioned plurality of PUCCH resources (UCI is encoded and transmitted over the PUCCH corresponding to other DCIs and the PUCCH corresponding to non-scheduled DCI), the reception period can also be specified differently (different values can also be used).

[0184] Figure 10 is a diagram showing an example of using non-scheduled DCI in Embodiment 3.2. This example is similar to Figure 8 , Figure 9 etc. The PDSCH is scheduled by DCI1 and the transmission of the corresponding PUCCH1 is controlled. In addition, DCI2 does not schedule the PDSCH, but the transmission of PUCCH2 that transmits the UCI for the PDSCH scheduled by the above DCI1 is controlled by this DCI2.

[0185] Period 1 corresponds to the reception period from after the reception symbol of the above other DCI to the start reception symbol of the PDSCH scheduled by this other DCI.

[0186] Period 2 corresponds to the reception period from after the reception symbol of the above other DCI to the end reception symbol of the PDSCH scheduled by this other DCI.

[0187] Period 3 corresponds to the reception period from after the reception symbol of the above other DCI to the start transmission symbol of the PUCCH triggered by this other DCI.

[0188] The non-scheduled DCI does not schedule the PDSCH. Therefore, for the HARQ codebook (HARQ-ACK codebook), the UE may also not count the non-scheduled DCI. This HARQ codebook may also be one or both of a semi-static HARQ codebook and a dynamic HARQ codebook.

[0189] For the non-scheduled DCI, the DL allocation index (Downlink Assignment Indicator (Index) (DAI)) may also not be counted. This DAI may also be at least one of a counter DAI (Counter DAI (C-DAI)) and a total DAI (Total DAI (T-DAI)). The UE may also ignore the DAI field of the non-scheduled DCI.

[0190] On the other hand, for non-scheduled DCI, the DAI can also be counted. The UE can also consider the DAI field of the non-scheduled DCI for HARQ-ACK control. In this case, the base station can grasp errors regarding the non-scheduled DCI (e.g., reception errors).

[0191] [[DCI for scheduling PDSCH]]

[0192] The DCI that triggers the PUCCH resource for transmitting HARQ-ACK for the PDSCH scheduled by other DCI can also be used for the scheduling of the same PDSCH. The above DCI can be used as a backup in the case of errors of the above other DCI.

[0193] The above DCI and the above other DCI can also have the same values in fields other than the PRI field and the TPC command field.

[0194] Even if an error occurs in the above other DCI, the UE can receive the PDSCH scheduled by the other DCI based on the above DCI, and can use the PUCCH corresponding to the above DCI to transmit the HARQ-ACK corresponding to the PDSCH.

[0195] Figure 11 It is a diagram showing an example of using scheduled DCI in Embodiment 3.2. This example is similar to Figure 8 , Figure 9 etc. The PDSCH is scheduled by DCI1 and the transmission of the corresponding PUCCH1 is controlled. In addition, DCI2 schedules the same PDSCH, and the transmission of PUCCH2 for transmitting the UCI for the PDSCH scheduled by the above DCI1 is controlled by this DCI2.

[0196] In this example, the reception of DCI1 fails, but the reception of DCI2 is successful, so the UE can receive the PDSCH. In addition, due to the failure of receiving DCI1, the UE cannot obtain the information of PUCCH1 and cannot transmit the UCI corresponding to the above PDSCH through PUCCH1. On the other hand, since the reception of DCI2 is successful, the UE can transmit the UCI corresponding to the above PDSCH through PUCCH2.

[0197] The control such as Figure 11 where multiple DCIs schedule the same PDSCH can be performed when not all of the CORESETs with CORESET pool indexes are set for the UE, or when the CORESET pool indexes of the CORESETs detecting the multiple DCIs are the same, or can also be performed when the CORESET pool indexes of the CORESETs detecting the multiple DCIs are different.

[0198] [Phase continuity]

[0199] In the third embodiment, in the case where multiple SRIs are allocated to multiple PUCCH resources within one time slot, at least one of the following can also be considered:

[0200] · For two symbols of multiple PUCCH resources, the phases are continuous with each other (the channel does not change within consecutive symbols, and the channel estimation result can be utilized).

[0201] · For two symbols of multiple PUCCH resources, the phases are not continuous with each other (the channel may change within consecutive symbols, and the channel estimation result cannot be utilized).

[0202] · In the case where two symbols of multiple PUCCH resources are consecutive and each SRI is the same, the phases of these symbols are continuous, and in the case where this is not the case (for example, the SRIs are different), the phases are not continuous.

[0203] According to the third embodiment described above, it is possible to appropriately perform retransmission applying different SRIs based on multiple DCIs.

[0204] <Fourth Embodiment>

[0205] The fourth embodiment relates to the symbol gap at the time of SRI switching.

[0206] As shown in the second embodiment, the third embodiment, etc., in the case where there are multiple PUCCH transmission opportunities for different SRIs within the same time slot, since the SRI (beam) switching process of the UE may take time, there may also be at least one of the following restrictions:

[0207] · A symbol gap is required between PUCCH#1 and PUCCH#2 with different SRIs.

[0208] · A symbol gap is required between symbols with different SRIs within one PUCCH resource.

[0209] · A symbol gap is required between PUCCH#1 and PUCCH#2 with different SRIs, but a symbol gap is not required between symbols with different SRIs within one PUCCH resource.

[0210] · A first symbol gap is required between PUCCH#1 and PUCCH#2 with different SRIs, and a second symbol gap is required between symbols with different SRIs within one PUCCH resource (for example, the first symbol gap can be greater than the second symbol gap, can be the same as the second symbol gap, or can be less than the second symbol gap).

[0211] In addition, the above restrictions can be either per-UL BWP restrictions, per-UL carrier (or cell) restrictions, or restrictions common to multiple UL carriers (or cells).

[0212] The symbol gap can also be used for restrictions in PUCCH resource allocation (for example, prohibiting PUCCH resource allocation within the symbol gap). A UE can also be allocated PUCCH resources that overlap with the symbol gap. In this case, the UE can also be considered as not requested (not performing) PUCCH transmission within the symbol gap.

[0213] The value of the symbol gap can be either pre-specified by the specification, set for the UE by higher-layer signaling, specified by DCI, or determined based on UE capabilities. In addition, the value of the symbol gap is not limited to positive values and can also take 0, negative values, etc.

[0214] Figures 12A - 12C It is a diagram showing an example of the symbol gap related to the fourth embodiment. Figure 12A This corresponds to a case where multiple SRIs (SRI#1, #2) are used to transmit UCI in multiple PUCCH resources (PUCCH#1, #2) within one time slot. As in this example, PUCCH resource allocation can also be performed to ensure a symbol gap between PUCCH resources.

[0215] Figure 12B This corresponds to a case where multiple SRIs (SRI#1, #2) are used to transmit UCI in one PUCCH resource (PUCCH#1) within one time slot. As in this example, a symbol gap may not be required between symbols with different SRIs within one PUCCH resource (the symbol gap is 0).

[0216] Figure 12C This corresponds to a case where multiple SRIs (SRI#1, #2) are used to transmit UCI in multiple PUCCH resources (PUCCH#1, #2) within one time slot. In this example, there are symbols of PUCCH#2 during the period within the symbol gap starting from the last symbol of PUCCH#1. In this case, the UE can also be considered as not transmitting PUCCH#2 during the period overlapping with the symbol gap starting from PUCCH#1 in PUCCH#2. In addition, the UE can either transmit PUCCH#2 during the period not overlapping with the symbol gap (the period after the symbol gap) or discard (or cancel) the transmission of PUCCH#2.

[0217] According to the fourth embodiment described above, SRI switching can be appropriately implemented considering the symbol gap.

[0218] <Others>

[0219] At least one of the above-described embodiments may also be applied only to a UE that reports a specific UE capability or supports the specific UE capability.

[0220] The specific UE capability may also represent at least one of the following:

[0221] · Whether PUCCH repetition is supported,

[0222] · Whether in-slot PUCCH repetition is supported,

[0223] · The maximum number of SRIs (or spatial relations) for each PUCCH resource supported,

[0224] · The maximum number of SRIs (or spatial relations) for each time slot (for PUCCH) supported.

[0225] Furthermore, at least one of the above-described embodiments may also be applied to a case where a specific information related to the above-described embodiments is set for the UE by higher layer signaling. For example, the specific information may also be information indicating activation of different spatial relations for PUCCH transmission opportunities, information setting the use of non-scheduled DCI, any RRC parameters for a specific version (e.g., Rel.17), etc.

[0226] In addition, the method of notifying the TPC command / PRI for each PUCCH transmission opportunity shown in the second and third embodiments may also be applied to the notification of the SRI for each PUCCH transmission opportunity. The TPC command, PRI, etc. of the second and third embodiments may also be replaced with the SRI.

[0227] In the second embodiment, at least one of UCI repetition and UCI coding may also be applied to multiple PUCCH transmission opportunities. In the third embodiment, considering the detection error of DCI, UCI repetition (UCI is encoded in units of PUCCH resources) is preferably used for multiple PUCCH transmission opportunities.

[0228] In addition, in each of the embodiments, an example of controlling multiple PUCCH transmission opportunities within one time slot using one or more DCIs is shown, but it is not limited thereto. For example, in the case of controlling multiple PUCCH transmission opportunities across multiple time slots using one or more DCIs, at least one of the contents of the above-described embodiments may also be applied. In this case, "within the time slot" in the description may be replaced with "between time slots", "within multiple time slots", etc., or "within the time slot" may be deleted for interpretation.

[0229] (Wireless communication system)

[0230] Hereinafter, the structure of a wireless communication system according to an embodiment of the present disclosure will be described. In this wireless communication system, any one of or a combination of the above-described wireless communication methods according to the respective embodiments of the present disclosure is used for communication.

[0231] Figure 13 FIG. is an example showing a schematic structure of a wireless communication system according to an embodiment. The wireless communication system 1 may also be a system that realizes communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the 5th generation mobile communication system New Radio (5G NR), or the like.

[0232] In addition, the wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0233] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the Master Node (MN), and the base station (gNB) of NR is the Secondary Node (SN). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0234] The wireless communication system 1 may also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity where both the MN and the SN are base stations (gNBs) of NR (NR-NR Dual Connectivity (NN-DC))).

[0235] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a - 12c) that is disposed within the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located within at least one cell. The configuration, number, etc. of each cell and the user terminal 20 are not limited to the manner shown in the figure. Hereinafter, without distinguishing between the base stations 11 and 12, they are collectively referred to as the base station 10.

[0236] The user terminal 20 may also be connected to at least one of the multiple base stations 10. The user terminal 20 may also utilize at least one of carrier aggregation (CA) and dual connectivity (DC) that uses multiple component carriers (CCs).

[0237] Each CC may also 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 also be included in FR1, and the small cell C2 may also 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 higher than 24 GHz (above - 24 GHz). Additionally, the frequency bands, definitions, etc. of FR1 and FR2 are not limited to these. For example, FR1 may correspond to a frequency band higher than FR2.

[0238] Furthermore, the user terminal 20 may also communicate in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0239] The multiple base stations 10 may also be connected by wire (e.g., optical fiber based on the Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is utilized as a backhaul between the base stations 11 and 12, the base station 11 that is equivalent to the upper - level station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 that is equivalent to the relay station (relay) may also be referred to as an IAB node.

[0240] The base station 10 can also be connected to the core network 30 via other base stations 10 or directly. For example, the core network 30 can also include at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), etc.

[0241] The user terminal 20 can also be a terminal that supports at least one of communication methods such as LTE, LTE-A, 5G, etc.

[0242] In the wireless communication system 1, a wireless access method based on Orthogonal Frequency Division Multiplexing (OFDM) can also 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. can also be used.

[0243] The wireless access method can also be referred to as a waveform. Additionally, in the wireless communication system 1, in the wireless access methods of the UL and DL, other wireless access methods (for example, other single-carrier transmission methods, other multi-carrier transmission methods) can also be used.

[0244] As a downlink channel, in the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. that are shared among the user terminals 20 can also be used.

[0245] In addition, as an uplink channel, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. that are shared among the user terminals 20 can also be used.

[0246] User data, high-layer control information, System Information Block (SIB), etc. are transmitted through the PDSCH. User data, high-layer control information, etc. can also be transmitted through the PUSCH. In addition, the Master Information Block (MIB) can also be transmitted through the PBCH.

[0247] Low-layer control information can also be transmitted through the PDCCH. The low-layer control information can also include, for example, downlink control information (Downlink Control Information (DCI)), and this downlink control information includes scheduling information for at least one of the PDSCH and the PUSCH.

[0248] In addition, the DCI that schedules the PDSCH can also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules the PUSCH can also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH can also be replaced by DL data, and the PUSCH can also be replaced by UL data.

[0249] In the detection of the PDCCH, a control resource set (Control Resource SET (CORESET)) and a search space can also be used. The CORESET corresponds to the resource for searching for DCI. The search space corresponds to the search area and search method for PDCCH candidates (PDCCH candidates). One CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a certain search space based on the search space setting.

[0250] A search space may also correspond to PDCCH candidates equivalent to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. Additionally, in the present disclosure, "search space", "search space set", "search space configuration", "search space set configuration", "CORESET", "CORESET configuration", etc. may also be used interchangeably.

[0251] Uplink control information (Uplink Control Information (UCI)) including at least one of channel state information (Channel State Information (CSI)), delivery confirmation information (which may also be referred to as Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (Scheduling Request (SR)) may also be transmitted via PUCCH. A random access preamble for establishing a connection with a cell may also be transmitted via PRACH.

[0252] Additionally, in the present disclosure, the downlink, uplink, etc. may also be expressed without "link". Further, it may also be expressed without "Physical" at the beginning of various channels.

[0253] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. As the DL-RS, in the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may also be transmitted.

[0254] The synchronization signal can also be, for example, at least one of the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be referred to as an SS / PBCH block, an SS block (SS Block (SSB)), etc. Additionally, SS, SSB, etc. can also be referred to as reference signals.

[0255] Furthermore, in the wireless communication system 1, as the Uplink Reference Signal (UL-RS), it is also possible to transmit a reference signal for measurement (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. Additionally, DMRS can also be referred to as a UE-specific Reference Signal.

[0256] (Base station)

[0257] Figure 14 FIG. is an example showing the structure of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission path interface (transmission line interface) 140. Additionally, one or more of the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140 can be provided respectively.

[0258] Furthermore, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it can also be assumed that the base station 10 also has other functional blocks required for wireless communication. A part of the processing of each unit described below can also be omitted.

[0259] The control unit 110 implements the overall control of the base station 10. The control unit 110 can be composed of a controller, a control circuit, etc. that can be explained based on the common knowledge in the technical field related to the present disclosure.

[0260] The control unit 110 can also control the generation, scheduling (e.g., resource allocation, mapping), etc. of signals. The control unit 110 can also control the transmission, reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. The control unit 110 can also generate data, control information, sequence, etc. to be transmitted as signals, and forward them to the transmission and reception unit 120. The control unit 110 can also perform call processing (setting, releasing, etc.) of communication channels, state management of the base station 10, management of radio resources, etc.

[0261] The transmission and reception unit 120 can also include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 can also include a transmission processing unit 1211 and a reception processing unit 1212. The transmission and reception unit 120 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission and reception circuit, etc. that can be described based on the common knowledge in the technical field related to the present disclosure.

[0262] The transmission and reception unit 120 can be configured as an integrated transmission and reception unit, or can be composed of a transmission unit and a reception unit. The transmission unit can also be composed of the transmission processing unit 1211 and the RF unit 122. The reception unit can also be composed of the reception processing unit 1212, the RF unit 122, and the measurement unit 123.

[0263] The transmission and reception antenna 130 can be composed of an antenna that can be described based on the common knowledge in the technical field related to the present disclosure, such as an array antenna, etc.

[0264] The transmission and reception unit 120 can also transmit the above-mentioned downlink channels, synchronization signals, downlink reference signals, etc. The transmission and reception unit 120 can also receive the above-mentioned uplink channels, uplink reference signals, etc.

[0265] The transmission and reception unit 120 can also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc. to form at least one of a transmission beam and a reception beam.

[0266] The transmission / reception unit 120 (transmission processing unit 1211) can also perform processing of the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0267] The transmission / reception unit 120 (transmission processing unit 1211) can also perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filter processing (filtering), Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, digital-to-analog conversion, etc. on the bit string to be transmitted, and output a baseband signal.

[0268] The transmission / reception unit 120 (RF unit 122) can also modulate the baseband signal to a radio frequency band, perform filter processing, amplification, etc., and transmit the radio frequency band signal via the transmission / reception antenna 130.

[0269] On the other hand, the transmission / reception unit 120 (RF unit 122) can also amplify, perform filter processing, demodulate to a baseband signal, etc. on the radio frequency band signal received through the transmission / reception antenna 130.

[0270] The transmission / reception unit 120 (reception processing unit 1212) can also perform reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filter processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing on the obtained baseband signal, and obtain user data, etc.

[0271] The transmission / reception unit 120 (measurement unit 123) may also perform measurements related to the received signal. For example, the measurement unit 123 may also perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may also perform measurements on 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 also be output to the control unit 110.

[0272] The transmission path interface 140 may also transmit and receive signals (backhaul signaling) between the device included in the core network 30, other base stations 10, etc., and may also obtain and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0273] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

[0274] In addition, the transmission / reception unit 120 may also transmit information specifying a plurality of Spatial Relation Information (SRI) related to one Physical Uplink Control Channel (PUCCH) resource.

[0275] The control unit 110 may also perform reception of a plurality of PUCCH transmission opportunities in the PUCCH resources transmitted using the spatial domain transmission filter based on the plurality of spatial relation information.

[0276] In addition, the transmission / reception unit 120 may also transmit information specifying a plurality of spatial relation information (SRI) related to a plurality of physical uplink control channel (PUCCH) resources.

[0277] The control unit 110 may also receive uplink control information in the plurality of PUCCH resources that are respectively transmitted using spatial domain transmission filters based on the plurality of spatial relation information.

[0278] (User Equipment)

[0279] Figure 15 FIG. is an example showing the structure of a user equipment according to an embodiment. The user equipment 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. In addition, one or more of the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may be provided respectively.

[0280] In addition, in this example, mainly the functional blocks of the characteristic parts in this embodiment are shown, and it can be assumed that the user equipment 20 also has other functional blocks required for wireless communication. A part of the processing of each unit described below may also be omitted.

[0281] The control unit 210 implements overall control of the user equipment 20. The control unit 210 may be constituted by a controller, a control circuit, etc. that can be described based on the common knowledge in the technical field related to the present disclosure.

[0282] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission / reception unit 220.

[0283] The transmission / reception 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 transmission / reception unit 220 may be constituted by a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, etc. that can be described based on the common knowledge in the technical field related to the present disclosure.

[0284] The transmission / reception unit 220 can be configured as an integrated transmission / reception unit, or can be composed of a transmission unit and a reception unit. The transmission unit can also be composed of a transmission processing unit 2211 and an RF unit 222. The reception unit can also be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0285] The transmission / reception antenna 230 can be composed of an antenna that can be described based on common knowledge in the technical field related to the present disclosure, such as an array antenna.

[0286] The transmission / reception unit 220 can also receive the above-mentioned downlink channels, synchronization signals, downlink reference signals, etc. The transmission / reception unit 220 can also transmit the above-mentioned uplink channels, uplink reference signals, etc.

[0287] The transmission / reception unit 220 can also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc. to form at least one of a transmission beam and a reception beam.

[0288] The transmission / reception unit 220 (transmission processing unit 2211) can also perform, for example, PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0289] The transmission / reception unit 220 (transmission processing unit 2211) can also perform transmission processing such as channel coding (which can include error correction coding), modulation, mapping, filter processing, DFT processing (if necessary), IFFT processing, precoding, digital-to-analog conversion, etc. on the bit string to be transmitted, and output a baseband signal.

[0290] In addition, regarding whether to apply DFT processing, it can also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is effective (enabled), the transmission / reception unit 220 (transmission processing unit 2211) can also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using the DFT-s-OFDM waveform. In other cases, the transmission / reception unit 220 (transmission processing unit 2211) can also not perform DFT processing as the above-mentioned transmission processing.

[0291] The transmission / reception unit 220 (RF unit 222) can also perform modulation to the radio frequency band, filter processing, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmission / reception antenna 230.

[0292] On the other hand, the transmission / reception unit 220 (RF unit 222) may also perform amplification, filtering, demodulation to a baseband signal, etc. on a signal in a radio frequency band received through the transmission / reception antenna 230.

[0293] The transmission / reception unit 220 (reception processing unit 2212) may also perform 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 on the obtained baseband signal, and obtain user data, etc.

[0294] The transmission / reception unit 220 (measurement unit 223) may also perform measurements related to 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 also measure received power (e.g., RSRP), reception quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0295] In addition, the transmission unit and the reception unit of the user terminal 20 in the present disclosure may also be constituted by at least one of the transmission / reception unit 220 and the transmission / reception antenna 230.

[0296] In addition, the control unit 210 may also apply a plurality of spatial relation information (Spatial Relation Information (SRI)) to one Physical Uplink Control Channel (PUCCH) resource.

[0297] The transmission / reception unit 220 may also perform transmission of a plurality of PUCCH transmission opportunities in the PUCCH resource by using spatial domain transmission filters based on the plurality of spatial relation information respectively.

[0298] The control unit 210 may also apply the plurality of SRIs to each hop of in-band hopping for the PUCCH resource.

[0299] The control unit 210 may also apply at least one of the plurality of SRIs to a plurality of hops of in-band hopping for the PUCCH resource.

[0300] The control unit 210 may also apply multiple spatial relation information (SRI) to multiple physical uplink control channel (PUCCH) resources.

[0301] The transmit / receive unit 220 may also use spatial domain transmit filters based on the multiple spatial relation information respectively to transmit uplink control information in the multiple PUCCH resources.

[0302] The transmit / receive unit 220 may also transmit the same uplink control information (UCI repetition) in the multiple PUCCH resources.

[0303] The control unit 210 may also be conceived as not scheduling the downlink shared channel through the second downlink control information in the case where one of the multiple PUCCH resources is triggered by the first downlink control information and the remaining PUCCH resources of the multiple PUCCH resources are triggered by the second downlink control information.

[0304] (Hardware structure)

[0305] In addition, the block diagrams used in the description of the above embodiments illustrate blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. Furthermore, there is no particular limitation on the implementation method of each functional block. That is, each functional block may be implemented by a physically or logically combined device, or may be implemented by directly or indirectly (e.g., by wire, wireless, etc.) connecting two or more physically or logically separated devices. The functional block may also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0306] Here, in the functions, there are judgment, decision-making, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, establishment, comparison, assumption, expectation, regarded as, broadcasting, notifying, communicating, forwarding, configuration (setting), reconfiguration (reconfiguring), allocation (allocating, mapping), assignment (assigning), etc., but not limited to these. For example, a functional block (structural unit) that implements the transmission function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method is not particularly limited.

[0307] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure can also function as a computer that processes the wireless communication method of the present disclosure. Figure 16 FIG. is an example showing the hardware structure of a base station and a user terminal according to an embodiment. The above-mentioned base station 10 and user terminal 20 can also 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.

[0308] In addition, in the present disclosure, terms such as device, circuit, equipment, section, unit, etc. can be substituted for each other. The hardware structure of the base station 10 and the user terminal 20 can be configured to include one or more of each device shown in the figure, or can be configured not to include some devices.

[0309] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing can be executed by one processor, or can be executed simultaneously, sequentially, or by other means by two or more processors. In addition, the processor 1001 can also be implemented by one or more chips.

[0310] Regarding each function in the base station 10 and the user terminal 20, for example, by reading a specific software (program) into hardware such as the processor 1001 and the memory 1002, the processor 1001 performs operations and controls communication via the communication device 1004, or controls at least one of reading and writing data in the memory 1002 and the storage 1003, thereby realizing it.

[0311] The processor 1001, for example, operates the operating system to control the entire computer. The processor 1001 may also be composed of a central processing unit (Central Processing Unit (CPU)) including an interface with peripheral devices, a control device, an arithmetic device, registers, etc. For example, at least a part of the above control unit 110 (210), transmission / reception unit 120 (220), etc. may also be implemented by the processor 1001.

[0312] In addition, the processor 1001 reads a program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes based on them. As the program, a program that causes the computer to execute at least a part of the operations described in the above embodiments can be used. For example, the control unit 110 (210) may also be implemented by a control program stored in the memory 1002 and operating in the processor 1001, and the same can be applied to other functional blocks.

[0313] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (Read Only Memory (ROM)), an erasable programmable read-only memory (Erasable Programmable ROM (EPROM)), an electrically erasable programmable read-only memory (Electrically EPROM (EEPROM)), a random access memory (Random Access Memory (RAM)), and other appropriate storage media. The memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 can store a program (program code), software module, etc. executable for implementing the wireless communication method according to an embodiment of the present disclosure.

[0314] The storage 1003 may also be a computer-readable recording medium, for example, composed of at least one of a flexible disc, a floppy (registered trademark) disc, an optical disc (e.g., a compact disc (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disc, a Blu-ray (registered trademark) disc, a removable disc, a hard disk drive, a smart card, a flash device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, and other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0315] The communication device 1004 is hardware (a transmitting and receiving device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, etc. For example, in order to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be physically or logically separated and implemented by a transmitting unit 120a (220a) and a receiving unit 120b (220b).

[0316] 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 an 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 an output to the outside. In addition, the input device 1005 and the output device 1006 may also have an integrated structure (e.g., a touch panel).

[0317] 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 constituted by a single bus or may be constituted by different buses between the respective devices.

[0318] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), etc., and a part or all of each functional block may also be implemented by this hardware. For example, the processor 1001 may also be implemented using at least one of these hardwares.

[0319] (Variant)

[0320] In addition, the terms described in this disclosure and the terms necessary for understanding this disclosure may also be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may also be replaced with each other. In addition, a signal may also be a message. A reference signal can also be abbreviated as RS and can also be referred to as a pilot, a pilot signal, etc. according to the applied standard. In addition, a component carrier (Component Carrier (CC)) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0321] A radio frame may also be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the radio frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) independent of the numerology.

[0322] Here, the numerology may also refer to communication parameters applied in at least one of the transmission and reception of a certain signal or channel. For example, the numerology may also represent at least one of a subcarrier spacing (SubCarrier Spacing (SCS)), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (Transmission Time Interval (TTI)), the number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transmitter-receiver in the frequency domain, a specific windowing process performed by a transmitter-receiver in the time domain, etc.

[0323] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on the numerology.

[0324] A time slot may also include a plurality of mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of a smaller number of symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as PDSCH (PUSCH) mapping type B.

[0325] A radio frame, subframe, time slot, mini-slot, and symbol all represent time units for transmitting signals. A radio frame, subframe, time slot, mini-slot, and symbol may also use other corresponding names. In addition, time units such as frames, subframes, time slots, mini-slots, and symbols in the present disclosure can also be replaced with each other.

[0326] For example, a subframe can also be referred to as a TTI, multiple consecutive subframes can also be referred to as a TTI, a time slot or a mini-slot can also be referred to as a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in existing LTE, can also be a period shorter than 1 ms (for example, 1 - 13 symbols), and can also be a period longer than 1 ms. In addition, the unit representing a TTI can also not be referred to as a subframe, but as a time slot, mini-slot, etc.

[0327] Here, a TTI, for example, refers to the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in units of TTI to each user terminal. In addition, the definition of a TTI is not limited to this.

[0328] A TTI can also be a transmission time unit for data packets (transport blocks), code blocks, codewords, etc. that have undergone channel coding, and can also become a processing unit for scheduling, link adaptation, etc. In addition, when a TTI is given, the time interval (for example, the number of symbols) actually mapped with a transport block, code block, codeword, etc. can also be shorter than the TTI.

[0329] In addition, when a time slot or a mini-slot is referred to as a TTI, one or more TTIs (that is, one or more time slots or one or more mini-slots) can also become the minimum time unit for scheduling. In addition, the number of time slots (mini-slot numbers) constituting the minimum time unit of this scheduling can also be controlled.

[0330] A TTI having a time length of 1 ms can also be referred to as a normal TTI (TTI in 3GPP Rel.8 - 12), standard TTI, long TTI, normal subframe, standard subframe, long subframe, time slot, etc. A TTI shorter than a normal TTI can also be referred to as a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, mini-slot, sub-time slot, time slot, etc.

[0331] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) can also be replaced with a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) can also be replaced with a TTI having a TTI length less than that of the long TTI and more than 1 ms.

[0332] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may also include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0333] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a time slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks respectively.

[0334] In addition, one or more RBs may also be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0335] In addition, a resource block may also be composed of one or more resource elements (REs). For example, one RE may also be a radio resource area of a subcarrier and a symbol.

[0336] A bandwidth part (BWP) (which may also be referred to as a partial bandwidth, etc.) may also represent a subset of consecutive common RBs (common resource blocks) used for a certain parameter set in a certain carrier. Here, the common RBs may also be determined by the index of the RBs based on the common reference point of the carrier. A PRB may also be defined in a certain BWP and be additionally numbered within that BWP.

[0337] A UL BWP (BWP for UL) and a DL BWP (BWP for DL) may also be included in a BWP. For a UE, one or more BWPs may also be set within one carrier.

[0338] At least one of the configured BWPs can also be active, and the UE may not assume to transmit and receive specific channels / signals outside the active BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced with "BWP".

[0339] In addition, the structures such as the above-mentioned radio frames, subframes, time slots, mini time slots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini time slots included in a time slot, the symbols and the number of RBs included in a time slot or mini time slot, the number of subcarriers included in an RB, and the number of symbols, symbol length, Cyclic Prefix (CP) length, etc. within a TTI can be changed in various ways.

[0340] In addition, the information, parameters, etc. described in the present disclosure can be represented by absolute values, relative values with respect to a specific value, or can also be represented by corresponding other information. For example, radio resources can also be indicated by a specific index.

[0341] In the present disclosure, the names used for parameters, etc. are not restrictive names in all aspects. Furthermore, the mathematical formulas, etc. using these parameters can also be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names. Therefore, the various names assigned to these various channels and information elements are not restrictive names in all aspects.

[0342] The information, signals, etc. described in the present disclosure can also be represented using any one of various different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0343] In addition, information, signals, etc. can be output in at least one of the following directions: from a higher layer to a lower layer, and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0344] The input and output information, signals, etc. can be stored in a specific location (e.g., a memory), or can be managed using a management table. The input and output information, signals, etc. can be overwritten, updated, or appended. The output information, signals, etc. can also be deleted. The input information, signals, etc. can also be sent to other devices.

[0345] The notification of information is not limited to the manners / embodiments described in the present disclosure, and other methods may also be used. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), high layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0346] In addition, physical layer signaling may also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, RRC signaling may also be referred to as an RRC message, and may also be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration (RRC Connection Re - setting) message, etc. In addition, MAC signaling may be notified, for example, using a MAC Control Element (MAC CE).

[0347] In addition, the notification of specific information (e.g., the notification of "is X") is not limited to explicit notification, and may also be performed implicitly (e.g., by not performing the notification of the specific information, or by the notification of other information).

[0348] The determination may be made by a value represented by one bit (0 or 1), may also be made by a true - false value (Boolean value) represented by true or false, and may also be made by a numerical comparison (e.g., comparison with a specific value).

[0349] Software, whether referred to as software, firmware, middleware, micro-code, hardware description language, or by any other name, should be broadly construed to mean instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, threads of execution, procedures, functions, etc.

[0350] In addition, software, instructions, information, etc. can also be sent and received via a transmission medium. For example, in the case of sending software from a website, server, or other remote source using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included in the definition of the transmission medium.

[0351] Terms such as "system" and "network" used in this disclosure can be used interchangeably. "Network" can also mean a device (e.g., a base station) included in the network.

[0352] In this disclosure, terms such as "precoding", "precoder", "weights (precoding weights)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel", etc. can be used interchangeably.

[0353] In the present 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" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, femto cell, pico cell, etc.

[0354] A base station can accommodate one or more (e.g., three) cells. In the case where a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each of the smaller areas can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides communication services within that coverage range.

[0355] In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "user device (User Equipment (UE))", "terminal" can be used interchangeably.

[0356] There are also cases where mobile stations are referred to by terms such as subscriber station, mobile unit, subscriber unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client, or several other suitable terms.

[0357] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Additionally, at least one of the base station and the mobile station may also 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.), a moving body that moves in an unmanned manner (e.g., a drone, a self-driving vehicle, etc.), or a robot (humanoid or non-humanoid). Additionally, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0358] Furthermore, the base station in the present disclosure may also be replaced with a user terminal. For example, for a structure in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (e.g., it may also be referred to as Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.), the various aspects / embodiments of the present disclosure may also be applied. In this case, it may also be configured such that the user terminal 20 has the functions of the above-described base station 10. Additionally, terms such as "uplink" and "downlink" may also be replaced with terms corresponding to inter-terminal communication (e.g., "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced with a side channel.

[0359] Similarly, the user terminal in the present disclosure may also be replaced with a base station. In this case, it may also be configured such that the base station 10 has the functions of the above-described user terminal 20.

[0360] In the present disclosure, an action performed by the base station may sometimes be performed by its upper node according to circumstances. Apparently, in a network including one or more network nodes having a base station, various operations for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (e.g., considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0361] Each mode / embodiment described in the present disclosure can be used alone, in combination, or switched during execution. In addition, for the processing procedures, sequences, flowcharts, etc. of each mode / embodiment described in the present disclosure, the order can also be changed as long as there is no contradiction. For example, for the methods described in the present disclosure, the elements of various steps are presented in the illustrated order, but are not limited to the specific order presented.

[0362] Each mode / embodiment described in the present disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (x is an integer or a decimal, for example), Future Radio Access (FRA), New Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, next-generation systems extended based on them, etc. In addition, multiple systems can also be combined (for example, a combination of LTE or LTE-A and 5G) for application.

[0363] As used in this disclosure, the recitation "based on" does not mean "based solely on" unless specifically stated otherwise. In other words, the recitation "based on" means both "based solely on" and "based at least on".

[0364] Any reference to an element using designations such as "first", "second", etc. used in this disclosure does not comprehensively limit the quantity or order of these elements. These designations can be used in this disclosure as a convenient method for distinguishing between two or more elements. Therefore, a reference to a first and a second element does not mean that only two elements can be employed, or that the first element must, in some form, take precedence over the second element.

[0365] The term "determining" as used in this disclosure encompasses various actions in some cases. For example, "determining" can also be a case where judging, calculating, computing, processing, deriving, investigating, looking up (searching, inquiring) (such as searching in a table, database, or other data structure), ascertaining, etc. are regarded as performing "determining".

[0366] Furthermore, "determining" can also be a case where receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, accessing (e.g., accessing data in a memory), etc. are regarded as performing "determining".

[0367] Furthermore, "determining" can also be a case where resolving, selecting, choosing, establishing, comparing, etc. are regarded as performing "determining". That is, "determining" can also be a case where some actions are regarded as performing "determining".

[0368] Furthermore, "determining" can also be replaced by "assuming", "expecting", "considering", etc.

[0369] As used in this disclosure, the terms "connected" and "coupled," or any variations thereof, mean all direct or indirect connections or couplings between two or more elements, and can include the situation where there is one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The coupling or connection between elements can be physical, logical, or a combination of them. For example, "connected" can also be replaced with "access."

[0370] In this disclosure, when two elements are connected, it is possible to consider using one or more wires, cables, printed electrical connections, etc., and electromagnetic energy having wavelengths in the radio frequency domain, microwave region, and optical (both visible and invisible) region, etc., as several non-limiting and non-inclusive examples, to be "connected" or "coupled" to each other.

[0371] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other." Additionally, this term can also mean "A and B are each different from C." Terms such as "separated" and "combined" can be interpreted in the same way as "different."

[0372] When the terms "include," "including," and their variations are used in this disclosure, these terms, like the term "comprising," are meant to be inclusive. Furthermore, the term "or" used in this disclosure does not mean exclusive or.

[0373] In this disclosure, for example, in the case where articles are added through translation such as a, an, and the in English, this disclosure can also include the case where the nouns following these articles are in the plural form.

[0374] Above, the invention related to this disclosure has been described in detail, but for those skilled in the art, the invention related to this disclosure is clearly not limited to the embodiments described in this disclosure. The invention related to this disclosure can be implemented in the form of amendments and changes without departing from the gist and scope of the invention determined based on the description in the claims. Therefore, the description of this disclosure is for illustrative purposes and does not carry any restrictive meaning regarding the invention related to this disclosure.

Claims

1. A terminal, comprising: a control unit that applies multiple spatial relation information, i.e., multiple SRIs (Spatial Relation Information), to the repeated transmission of a Physical Uplink Control Channel (PUCCH) in a PUCCH resource within one time slot for multiple transmission / reception points, i.e., multiple TRPs (Transmission / Reception Point), and controls the transmission power of the repeated transmission of the PUCCH based on transmit power control, i.e., TPC (Transmit Power Control) correlation parameters set corresponding to the multiple SRIs; and a transmission unit that repeatedly transmits the PUCCH based on the transmission power using spatial domain filters based on the multiple SRIs, a TPC command field including the number of the multiple SRIs is included in downlink control information, i.e., DCI (Downlink Control Information), for scheduling a Physical Downlink Shared Channel (PDSCH).

2. The terminal according to claim 1, wherein the control unit applies frequency hopping to the PUCCH resource.

3. The terminal according to claim 1, wherein the transmission unit transmits capability information indicating support for the repeated transmission of the PUCCH within one time slot.

4. A wireless communication method, which is a wireless communication method of a terminal, comprising: a step of applying multiple spatial relation information, i.e., multiple SRIs (Spatial Relation Information), to the repeated transmission of a Physical Uplink Control Channel (PUCCH) in a PUCCH resource within one time slot for multiple transmission / reception points, i.e., multiple TRPs (Transmission / Reception Point), and controlling the transmission power of the repeated transmission of the PUCCH based on transmit power control, i.e., TPC (Transmit Power Control) correlation parameters set corresponding to the multiple SRIs; and a step of repeatedly transmitting the PUCCH based on the transmission power using spatial domain filters based on the multiple SRIs, a TPC command field including the number of the multiple SRIs is included in downlink control information, i.e., DCI (Downlink Control Information), for scheduling a Physical Downlink Shared Channel (PDSCH).

5. A base station, comprising: A transmitting unit that transmits information on multiple spatial relation information (SRI) related to repeated transmission of a Physical Uplink Control Channel (PUCCH) in a PUCCH resource within a specified time slot for multiple transmission / reception points (TRP), and transmit power control (TPC) associated parameters related to the transmit power of the repeated transmission of the PUCCH corresponding to the multiple SRI; and A receiving unit that receives the repeatedly transmitted PUCCH by respectively using a spatial domain filter based on the multiple SRI and the transmit power, In the downlink control information (DCI) for scheduling a Physical Downlink Shared Channel (PDSCH), a TPC command field including the number of the multiple SRI is included.

6. A system having a terminal and a base station, wherein The terminal has: A control unit that applies multiple spatial relation information (SRI) for repeated transmission of a PUCCH in a PUCCH resource within a time slot for multiple transmission / reception points (TRP), and controls the transmit power of the repeated transmission of the PUCCH based on transmit power control (TPC) associated parameters set corresponding to the multiple SRI; And A transmitting unit that repeatedly transmits the PUCCH based on the transmit power by respectively using a spatial domain filter based on the multiple SRI, The base station has: A transmitting unit that transmits information specifying the multiple SRI and the TPC associated parameters; And A receiving unit that receives the repeatedly transmitted PUCCH by respectively using the spatial domain filter and the transmit power, In the downlink control information (DCI) for scheduling a Physical Downlink Shared Channel (PDSCH), a TPC command field including the number of the multiple SRI is included.

Images