Terminal, wireless communication method, base station, and system

Abstract

To appropriately control decoding of a PDSCH even when MTRPs are used.SOLUTION: A terminal according to an aspect of the present disclosure includes a control unit that determines a transmission configuration indication (TCI) state of a semi-persistent scheduling (SPS) downlink shared channel (PDSCH) using multiple transmission / reception points (MTRPs) based on downlink control information (DCI) for activating a semi-persistent scheduling (SPS) setting, and a receiving unit that receives the SPS PDSCH corresponding to the TCI state. According to an aspect of the present disclosure, decoding of the PDSCH can be appropriately controlled even when the MTRPs are used.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

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

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

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

[0005] Future wireless communication systems (e.g., NR) will use transmission and reception based on semi-persistent scheduling (SPS).

[0006] In Rel.15 NR, a user terminal (User Equipment (UE)) could be provided with only one configuration (which may simply be called SPS configuration) for the SPS downlink shared channel (Physical Downlink Shared Channel (PDSCH)). On the other hand, in Rel.16 NR, a UE may be provided with multiple SPS configurations. In this case, the UE may activate / deactivate multiple SPS configurations by one activation / release downlink control information.

[0007] In the NR, it is considered that one or more transmission / reception points (TRPs) (multi-TRPs (MTRPs)) perform DL transmission to a UE. It is also considered that a UE performs UL transmission to one or more TRPs.

[0008] In Rel.17 NR, it is considered that a UE that has the capability of simultaneously receiving two different Quasi-Co-Location (QCL) Type D channels / signals can receive two SPS PDSCHs or one SPS PDSCH and one dynamic scheduling PDSCH in the event of collision.

[0009] However, there is still no research on how to guarantee this and how to define the rules for selecting the PDSCH to be decoded. If the selection of the PDSCH to be decoded is not clarified, there is a risk that the increase in communication throughput will be suppressed.

[0010] Therefore, an object of the present disclosure is to provide a terminal, a wireless communication method, a base station, and a system that can appropriately control decoding of PDSCH even when MTRP is used. [Means for solving the problem]

[0011] A terminal according to one embodiment of the present disclosure has a control unit that determines a transmission configuration indication (TCI) state of an SPS downlink shared channel (PDSCH) that uses multiple transmission / reception points (MTRP) based on downlink control information (DCI) for activating semi-persistent scheduling (SPS) settings, and a receiving unit that receives an SPS PDSCH corresponding to the TCI state. Effect of the Invention

[0012] According to one aspect of the present disclosure, decoding of PDSCH can be appropriately controlled even when MTRP is used. [Brief description of the drawings]

[0013] [Figure 1] 1A and 1B are diagrams illustrating an example of PDSCH selection according to PDSCH selection rule 1. FIG. [Diagram 2] 2A and 2B are diagrams illustrating an example of PDSCH selection according to PDSCH selection rule 2. FIG. [Diagram 3] 3A and 3B are diagrams illustrating an example of PDSCH selection in embodiment 1.1. [Figure 4] 4A and 4B are diagrams showing another example of PDSCH selection in embodiment 1.1. [Diagram 5] 5A and 5B are diagrams illustrating an example of PDSCH selection in embodiment 2.1. [Figure 6] FIG. 6 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 7] FIG. 7 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 8]FIG. 8 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 9] FIG. 9 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] (SPS) In NR, transmission and reception based on Semi-Persistent Scheduling (SPS) is used. In this disclosure, SPS may be interchangeably read as Downlink (DL) SPS.

[0015] The UE may activate or deactivate (release) an SPS configuration based on a downlink control channel (Physical Downlink Control Channel (PDCCH)). The UE may receive a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) of the corresponding SPS based on the activated SPS configuration.

[0016] In addition, in the present disclosure, PDCCH may be read as downlink control information (DCI) transmitted using PDCCH, simply DCI, etc. Also, in the present disclosure, SPS, SPS PDSCH, SPS setting, SPS occasion, SPS reception, SPS PDSCH reception, SPS scheduling, etc. may be read as mutually interchangeable terms.

[0017] A DCI for activating or deactivating an SPS setting may be referred to as an SPS activation DCI (or an SPS assignment DCI), an SPS deactivation DCI, etc. An SPS deactivation DCI may be referred to as an SPS release DCI, simply an SPS release, etc.

[0018] The DCI may have Cyclic Redundancy Check (CRC) bits scrambled by a predefined RNTI (e.g., a Configured Scheduling Radio Network Temporary Identifier (CS-RNTI)).

[0019] The DCI may be a DCI format for PUSCH scheduling (DCI format 0_0, 0_1, etc.), a DCI format for PDSCH scheduling (DCI format 1_0, 1_1, etc.), etc. A DCI in which a plurality of fields indicate a certain bit string may indicate an SPS activation DCI or an SPS release DCI.

[0020] The SPS configuration (which may also be referred to as configuration information regarding SPS) may be configured in the UE using higher layer signaling.

[0021] In the present disclosure, higher layer signaling may be, for example, any one or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like.

[0022] The MAC signaling may be, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0023] Configuration information regarding SPS (e.g., an RRC "SPS-Config" information element) may include an index for identifying the SPS (which may be referred to as an SPS index, an SPS configuration index, etc.), information regarding SPS resources (e.g., an SPS periodicity), information regarding PUCCH resources for the SPS, etc.

[0024] The UE may determine the length, starting symbol, etc. of the SPS based on the time domain allocation field of the SPS activation DCI.

[0025] The SPS may be configured as a Special Cell (SpCell) (e.g., a Primary Cell (PCell) or a Primary Secondary Cell (PSCell)), or may be configured as a Secondary Cell (SCell).

[0026] However, in the existing Rel.15 NR, the specification states that SPS cannot be configured for more than one serving cell per cell group at the same time (i.e., one SPS configuration per cell group). Only one SPS configuration may be allowed (configured) per Bandwidth Part (BWP) of the serving cell.

[0027] In this disclosure, the SPS PDSCH associated with the activation DCI may refer to the first SPS PDSCH activated (triggered) by the activation DCI. The SPS PDSCH associated with the activation DCI may also be called an SPS PDSCH with associated DCI, an SPS PDSCH with corresponding PDCCH, an SPS PDSCH indicated by DCI, an SPS PDSCH with activation DCI, etc.

[0028] In addition, in the present disclosure, the SPS PDSCH not associated with the activation DCI may refer to the second or subsequent SPS PDSCH activated by the activation DCI. The SPS PDSCH not associated with the activation DCI may also be referred to as the SPS PDSCH without associated DCI (PDCCH), the SPS PDSCH without corresponding DCI (PDCCH), the SPS PDSCH without activation DCI, etc.

[0029] (Rel.16 SPS) In Rel.15 NR, a UE could be provided with only one configuration for SPS PDSCH (which may simply be called SPS configuration). On the other hand, in Rel.16 NR, a UE may be provided with multiple SPS configurations. In this case, a UE may activate / deactivate multiple SPS configurations by one activation / release DCI.

[0030] In Rel. 16 NR, if there are one or more PDSCHs (e.g., SPS PDSCHs) without corresponding PDCCH transmissions for a serving cell in a slot (symbols other than those designated as UL), the UE shall receive the one or more PDSCHs in the slot as follows: Step 0: Set j=0, where j is the number of PDSCHs selected for decoding, and Q is the set of activated PDSCHs with no corresponding PDCCH transmission in that slot. Step 1: The UE receives one PDSCH with the smallest configured SPS configuration index (higher layer parameter “sps-ConfigIndex”) among Q, and sets j=j+1. It designates the received PDSCH as a survivor PDSCH. - Step 2: Exclude from Q the survivor PDSCHs of step 1 and other PDSCH(s) that overlap (even partially) with the survivor PDSCHs. - Step 3: Repeat steps 1 and 2 until Q is empty or j is equal to the number of unicast PDSCHs in one slot supported by the UE.

[0031] The rule in Rel.16 for selecting a PDSCH to receive from one or more PDSCHs without a corresponding PDCCH transmission according to steps 0-3 above may be referred to as PDSCH selection rule 1 in this disclosure.

[0032] 1A and 1B are diagrams showing an example of PDSCH selection according to PDSCH selection rule 1. In this example, four SPS configurations are activated for a serving cell. FIG. 1A shows an example in which, in a certain slot, there is an SPS PDSCH with an SPS configuration index (higher layer parameter "sps-ConfigIndex")=0 in the 3rd to 6th symbols, an SPS PDSCH with an SPS configuration index=1 in the 4th to 7th symbols, an SPS PDSCH with an SPS configuration index=2 in the 8th to 14th symbols, and an SPS PDSCH with an SPS configuration index=3 in the 11th to 14th symbols.

[0033] In this example, first, the SPS PDSCHs corresponding to four SPS settings correspond to Q. Among this Q, the SPS PDSCH with SPS setting index = 0 corresponding to the smallest index is first designated as the survivor PDSCH, and the survivor PDSCH and the SPS PDSCH with SPS setting index = 1 that overlaps with it in time are excluded from Q. Next, from the remaining Q, the SPS PDSCH with SPS setting index = 2 corresponding to the smallest index is designated as the survivor PDSCH, and the survivor PDSCH and the SPS PDSCH with SPS setting index = 3 that overlaps with it in time are excluded from Q.

[0034] The result of applying PDSCH selection rule 1 to Fig. 1A is shown in Fig. 1B. In this example, the selected PDSCHs are the PDSCH with SPS setting index = 0 corresponding to the survivor PDSCH in step 1 and the PDSCH with SPS setting index = 2.

[0035] Also, in Rel.16 NR, a UE is not expected to decode a PDSCH of a serving cell that is scheduled by a PDCCH that has (or is CRC scrambled using) a Cell Radio Network Temporary Identifier (C-RNTI), Configured Scheduling RNTI (CS-RNTI) or Modulation Coding Scheme Cell RNTI (MCS-C-RNTI) and one or more PDSCHs (e.g., SPS PDSCHs) of the same serving cell that have no corresponding PDCCH transmission, if these PDSCHs overlap partially or completely in time.

[0036] In addition, in this disclosure, a PDSCH scheduled by a PDCCH having a C-RNTI, a CS-RNTI, or an MCS-RNTI may be referred to as a dynamic scheduling PDSCH.

[0037] However, even if the dynamic scheduling PDSCH and one or more PDSCHs without the corresponding PDCCH transmission overlap partially or completely in time, the UE decodes the dynamic scheduling PDSCH if the PDCCH that schedules the dynamic scheduling PDSCH ends at least 14 symbols before the earliest start symbol of the one or more PDSCHs without the corresponding PDCCH transmission.

[0038] The above rule in Rel. 16 for controlling the decoding of a dynamic scheduling PDSCH (selecting a PDSCH to decode) when the dynamic scheduling PDSCH overlaps with one or more PDSCHs without corresponding PDCCH transmission may be referred to as PDSCH selection rule 2 in this disclosure.

[0039] 2A and 2B are diagrams illustrating an example of PDSCH selection according to PDSCH selection rule 2. In this example, two SPS configurations are activated for a serving cell. FIG. 2A illustrates an example in which, in a certain slot, there is an SPS PDSCH with SPS configuration index=0 in the 3rd to 6th symbols, and there is an SPS PDSCH with SPS configuration index=1 in the 4th to 7th symbols.

[0040] Also, in this example, in the first symbol of the slot immediately preceding the slot in which these SPS PDSCHs are transmitted, the UE detects a PDCCH for a dynamic scheduling PDSCH, and the PDSCH scheduled by the PDCCH (dynamic scheduling PDSCH) is located in the third to seventh symbols of the slot in which these SPS PDSCHs are transmitted.

[0041] According to PDSCH selection rule 2, the PDCCH that schedules the dynamic scheduling PDSCH is completed at least 14 symbols before the earliest start symbol (the start symbol (third symbol) of the SPS PDSCH with SPS setting index = 2) of the SPS PDSCHs that overlap with the dynamic scheduling PDSCH, so the UE decodes the dynamic scheduling PDSCH but does not decode the SPS PDSCH that overlaps with the dynamic scheduling PDSCH.

[0042] The result of applying PDSCH selection rule 2 to Figure 2A is shown in Figure 2B. In this example, the selected PDSCH is a dynamic scheduling PDSCH.

[0043] (Multi-TRP) In the NR, it is considered that one or more transmission / reception points (TRPs) (multi-TRPs (MTRPs)) perform DL transmission to a UE. It is also considered that a UE performs UL transmission to one or more TRPs.

[0044] In Rel.17 NR, it is considered that a UE that has the capability of simultaneously receiving two different Quasi-Co-Location (QCL) Type D channels / signals can receive two SPS PDSCHs or one SPS PDSCH and one dynamic scheduling PDSCH in the event of collision.

[0045] However, there is still no research on how to guarantee this and how to define the rules for selecting the PDSCH to be decoded. If the selection of the PDSCH to be decoded is not clarified, there is a risk that the increase in communication throughput will be suppressed.

[0046] Therefore, the present inventors have conceived a method for appropriately controlling the decoding of PDSCH even when MTRP is used.

[0047] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0048] In the present disclosure, "A / B" may mean "at least one of A and B."

[0049] In the present disclosure, the terms activate, deactivate, indicate, select, configure, update, determine, etc. may be read as interchangeable terms.

[0050] In the present disclosure, RRC, RRC parameters, RRC messages, higher layer parameters, information elements (IEs), and configurations may be interchangeable. In the present disclosure, MAC CE, update commands, and activation / deactivation commands may be interchangeable. In the present disclosure, support, control, controllable, operate, and operable may be interchangeable.

[0051] In the present disclosure, panel, beam, panel group, beam group, Uplink (UL) transmitting entity, TRP, spatial relationship information (SRI), spatial relationship, control resource set (CORESET), Physical Downlink Shared Channel (PDSCH), codeword, base station, a specific antenna port (e.g., a DeModulation Reference Signal (DMRS) port), a specific antenna port group (e.g., a DMRS port group), a specific group (e.g., a Code Division Multiplexing (CDM) group, a specific reference signal group, a CORESET group), a specific resource (e.g., a specific reference signal resource), a specific resource set (e.g., a specific reference signal resource set), a CORESET pool, a PUCCH group (PUCCH resource group), a spatial relationship group, a downlink TCI state (DL TCI state), an uplink TCI state (UL TCI state), a unified TCI state, a QCL, and the like may be read as interchangeable.

[0052] In addition, a TCI status identifier (ID) and a TCI status may be interchangeable. A TCI status and a TCI may be interchangeable.

[0053] In this disclosure, the terms index, ID, indicator, and resource ID may be interchangeable. In this disclosure, the terms sequence, list, set, group, cluster, and subset may be interchangeable.

[0054] In the present disclosure, a single PDCCH (DCI) may be referred to as a PDCCH (DCI) of a first scheduling type (e.g., scheduling type A (or type 1)), and a multi-PDCCH (DCI) may be referred to as a PDCCH (DCI) of a second scheduling type (e.g., scheduling type B (or type 2)).

[0055] In this disclosure, for a single DCI, the ith TRP (TRP#i) may refer to the ith TCI state, the ith CDM group, etc. (i is an integer). For a multi-DCI, the ith TRP (TRP#i) may refer to the CORESET corresponding to CORESET pool index=i, the ith TCI state, the ith CDM group, etc. (i is an integer).

[0056] In this disclosure, a single PDCCH may be assumed to be supported when multiple TRPs use an ideal backhaul, and multiple PDCCHs may be assumed to be supported when multiple TRPs use a non-ideal backhaul.

[0057] In addition, the ideal backhaul may be called DMRS port group type 1, reference signal associated group type 1, antenna port group type 1, CORESET pool type 1, etc. The non-ideal backhaul may be called DMRS port group type 2, reference signal associated group type 2, antenna port group type 2, CORESET pool type 2, etc. The names are not limited to these.

[0058] In the present disclosure, multi-TRP (MTRP), multi-TRP system, multi-TRP transmission, and multi-PDSCH may be read as interchangeable.

[0059] In the present disclosure, single DCI (sDCI), single PDCCH, multi-TRP system based on single DCI, sDCI-based MTRP, and activating two TCI states on at least one TCI codepoint may be read as interchangeable.

[0060] In the present disclosure, multi-DCI (mDCI), multi-PDCCH, multi-TRP system based on multi-DCI, mDCI-based MTRP, and setting two CORESET pool indices or CORESET pool index=1 (or a value greater than or equal to 1) may be read as interchangeable.

[0061] In the present disclosure, "simultaneous reception capability" may be read interchangeably as simultaneous reception capability of two different QCL type D channels / signals. The following embodiments are described assuming a UE having simultaneous reception capability, but may be applied to a UE not having simultaneous reception capability.

[0062] In the present disclosure, "collision (or collide)" may be read interchangeably with "overlap (or overlap (in time))."

[0063] (Wireless communication method) <First embodiment> The first embodiment relates to determining which PDSCH to receive (decode) in the case where multiple SPS PDSCHs overlap in time.

[0064] The first embodiment is broadly divided into embodiments 1.1 and 1.2, each of which will be described below.

[0065] [Embodiment 1.1] In embodiment 1.1, each SPS setting is associated with a TRP.

[0066] The association between the SPS configuration and the TRP may be interpreted as the association between an SPS configuration index (for example, an RRC parameter SPS-ConfigIndex-r16 indicating an SPS configuration index in Rel. 16 or later) and the TRP.

[0067] The association of the SPS configuration with the TRP may be performed by RRC associating the SPS configuration with a specific index. The specific index may be, for example, at least one of a CORESET pool index, a group ID, a group ID equivalent to a TRP ID, etc. For an SPS configuration that is not explicitly associated with the specific index, a specific value (e.g., 0) may be applied as the specific index.

[0068] Hereinafter, in the present disclosure, the specific index will be described assuming that it is a CORESET pool index, but is not limited thereto. The "CORESET pool index" in the present disclosure may be read as at least one of the specific indexes.

[0069] The association between the SPS configuration and the TRP may be performed by an implicit association between the SPS configuration and the specific index. For example, the UE may assume that the CORESET pool index of the PDCCH that activates the SPS configuration is the CORESET pool index associated with the SPS configuration.

[0070] When a UE receives a DCI (SPS release DCI) releasing a certain SPS setting (validating that the DCI indicates a scheduling release of a certain SPS setting), the UE may expect to detect the SPS release DCI in a PDCCH associated with the same CORESET pool index as the PDCCH that detects the activation DCI of the SPS setting, or may detect the SPS release DCI in a PDCCH associated with the same or different CORESET pool index as the PDCCH that detects the activation DCI of the SPS setting.

[0071] In embodiment 1.1, the above PDSCH selection rule 1 may be applied only when the SPS PDSCHs of the SPS configurations associated with the same TRP collide.

[0072] After collision handling (collision resolution, PDSCH selection) based on PDSCH selection rule 1 in each TRP, when SPS PDSCHs associated with different TRPs collide in time, a UE with simultaneous reception capability may simultaneously receive these overlapping SPS PDSCHs as long as the number of remaining PDSCHs (the number of PDSCHs once determined to be received (indicated as survivor PDSCHs)) j is not greater than the number of unicast PDSCHs in one slot supported by the UE.

[0073] If the number j of remaining PDSCHs is greater than the number of supported unicast PDSCHs in one slot, the UE may remove PDSCHs that meet at least one of the following (1.1.1) and (1.1.2) in order from the remaining PDSCHs until j is equal to or less than the number of supported unicast PDSCHs in one slot (the removed PDSCHs are not received): (1.1.1) Among the PDSCHs related to the highest CORESET pool index, the PDSCH having the highest SPS setting index; (1.1.2) The PDSCH with the highest SPS setting index.

[0074] In this disclosure, "highest" may be read as "largest," "lowest," "minimum," "ith (i is an integer, e.g., 1, 2, ...)," etc. In this disclosure, "small" and "large" may be read as "largest," "minimum," "minimum," "ith (i is an integer, e.g., 1, 2, ...)," etc.

[0075] In addition, in the PDSCH selection rule 1 in each TRP, "until Q becomes empty or j is equal to the number of unicast PDSCHs in one slot supported by the UE" in step 3 may be read as "until Q becomes empty." Also, counting j may be performed for each TRP or may be performed collectively for multiple TRPs. The same may be applied to the following embodiments.

[0076] 3A and 3B are diagrams showing an example of PDSCH selection in embodiment 1.1. In this example, four SPS configurations are activated for a serving cell. Each SPS PDSCH is located at the same position as in FIG. 1A. FIG. 3A differs from FIG. 1A in that a CORESET pool index is associated with the SPS configuration, and CORESET pool index=0 corresponds to SPS configuration index=0, 1, and 3, and CORESET pool index=1 corresponds to SPS configuration index=2.

[0077] In this example, it is assumed that the number of supported unicast PDSCHs in one slot is three.

[0078] In this example, PDSCH selection rule 1 is first applied to CORESET pool index = 0. The SPS PDSCH corresponding to the SPS setting of CORESET pool index = 0 corresponds to Q. The SPS PDSCH with SPS setting index = 0 corresponding to the smallest index among this Q is first designated as the survivor PDSCH, and the survivor PDSCH and the SPS PDSCH with SPS setting index = 1 that overlaps with it in time are excluded from Q. Next, the SPS PDSCH with SPS setting index = 2 corresponding to the smallest index among the remaining Q is designated as the survivor PDSCH. The survivor PDSCH is excluded from Q. There is no SPS PDSCH with the same CORESET pool index that overlaps with the survivor PDSCH in time.

[0079] Next, PDSCH selection rule 1 is applied to CORESET pool index = 1. The SPS PDSCH with SPS setting index = 2 is specified as the survivor PDSCH.

[0080] Since the sum of the selected PDSCHs for each CORESET pool index is 3, which is less than or equal to the number of unicast PDSCHs in one slot supported, a UE with simultaneous reception capability will decode the selected three SPS PDSCHs in this slot. The result of applying the PDSCH selection in embodiment 1.1 to Figure 3A is shown in Figure 3B.

[0081] Figures 4A and 4B are diagrams showing another example of PDSCH selection in embodiment 1.1. In this example, in the case of Figure 3A, as a result of applying PDSCH selection for each CORESET pool index, the case where SPS PDSCHs with SPS setting indexes = 0, 2, and 3 remain as in Figure 3B is considered. In this example, the number of unicast PDSCHs supported in one slot is 2, which is different from the cases of Figures 3A and 3B.

[0082] Since the total number of PDSCHs selected for each CORESET pool index is 3, which exceeds the number of unicast PDSCHs supported in one slot, one of the remaining PDSCHs (SPS PDSCHs with SPS setting indices = 0, 2, and 3) must be excluded from the decoding target.

[0083] Based on the above (1.1.1), as shown in FIG. 4A, the SPS PDSCH with SPS configuration index=2, which corresponds to the highest SPS configuration index among the highest CORESET pool indexes, is excluded.

[0084] Based on the above (1.1.2), as shown in FIG. 4B, the SPS PDSCH with SPS configuration index=3, which corresponds to the highest SPS configuration index, is excluded.

[0085] [Embodiment 1.2] In embodiment 1.2, each SPS PDSCH in the SPS configuration is associated with a TRP, and the above PDSCH selection rule 1 may be applied only when the SPS PDSCHs associated with the same TRP collide.

[0086] In embodiment 1.1, association with a TRP is in units of SPS configuration, whereas in embodiment 1.2, association is in units of SPS PDSCH.

[0087] The association between the SPS PDSCH and the TRP may be determined based on at least one of an SPS configuration index corresponding to the SPS PDSCH, a specific index mentioned in embodiment 1.1, a TCI state (or a TCI state index), a QCL assumption, and the like.

[0088] Multiple (e.g., N) TCI states may be configured by RRC for SPS configuration, and different TCI states may be explicitly or implicitly associated with CORESET Pool Indexes (TRPs). A mapping rule between TCI states and SPS PDSCH may be predefined by a specification, may be configured by higher layer signaling, or may be determined based on UE capabilities.

[0089] For example, the mapping between TCI states and SPS PDSCHs may be as follows: the mod(i,N)-th TCI state is assigned to the i-th (e.g., i is an integer equal to or greater than 1) SPS PDSCH after SPS activation is notified / indicated.

[0090] Note that such a mapping rule between the TCI state and the SPS PDSCH may be used to determine the association between the CORESET pool index and the SPS PDSCH.

[0091] Multiple (e.g., N) TCI states are specified by the TCI field of the SPS activation DCI, and different TCI states may be explicitly or implicitly associated with a CORESET pool index (TRP). A mapping rule between the TCI state and the SPS PDSCH may be predefined by a specification, may be configured by higher layer signaling, or may be determined based on UE capabilities.

[0092] In embodiment 1.2, the above PDSCH selection rule 1 may be applied only when SPS PDSCHs associated with the same TRP collide.

[0093] After collision handling (collision resolution, PDSCH selection) based on PDSCH selection rule 1 in each TRP, when SPS PDSCHs associated with different TRPs collide in time, a UE with simultaneous reception capability may simultaneously receive these overlapping SPS PDSCHs as long as the number of remaining PDSCHs (the number of PDSCHs once determined to be received (indicated as survivor PDSCHs)) j is not greater than the number of unicast PDSCHs in one slot supported by the UE.

[0094] If the number j of remaining PDSCHs is greater than the number of supported unicast PDSCHs in one slot, the UE may remove PDSCHs that satisfy at least one of the following (1.2.1) to (1.2.3) in order from the remaining PDSCHs until j is equal to or less than the number of supported unicast PDSCHs in one slot (the removed PDSCHs are not received): (1.2.1) Among the PDSCHs related to the highest CORESET pool index, the PDSCH having the highest SPS setting index; (1.2.2) PDSCH with the highest SPS setting index, (1.2.3) Among the PDSCHs relating to the highest CORESET pool index, the PDSCH corresponding to the highest TCI state ID.

[0095] [Modification of the first embodiment] In the first embodiment, step 2 of the above PDSCH selection rule 1 may be read as follows: - Step 2: Exclude from Q the survivor PDSCH of step 1 and other PDSCH(s) that overlap (even partially) with the survivor PDSCH and that correspond to a TCI state having a different QCL type D (or that is not related to QCL type D) than the survivor PDSCH.

[0096] According to this reinterpretation of step 2, if the TCI state of the overlapping SPS PDSCH has the same QCL type D (reference RS), the overlapping SPS PDSCH can be received by the UE.

[0097] According to the first embodiment described above, even if the MTRP operation is configured for a UE, when a plurality of SPS PDSCHs collide, the UE can appropriately determine a PDSCH to be decoded.

[0098] <Second embodiment> The second embodiment relates to determining a PDSCH to be received (decoded) in a case where a dynamic scheduling PDSCH overlaps (duplicates) in time with an SPS PDSCH in mDCI-based MTRP.

[0099] The second embodiment is broadly divided into embodiments 2.1 and 2.2, each of which will be described below.

[0100] [Embodiment 2.1] In embodiment 2.1, each SPS configuration is associated with a TRP. In embodiment 2.1, the same control as described above in embodiment 1.1 may be applied. For example, the above PDSCH selection rule 1 may be applied only when the SPS PDSCHs of SPS configurations associated with the same TRP collide.

[0101] In addition, the above PDSCH selection rule 2 may be applied only when a dynamic scheduling PDSCH and an SPS PDSCH of an SPS configuration associated with the same TRP collide.

[0102] In the present disclosure, the association between the dynamic scheduling PDSCH and the TRP may be performed, for example, by an explicit association between the PDSCH configuration (PDSCH-Config) and the CORESET pool index by the RRC, or may be specified by a field of the DCI.

[0103] In the present disclosure, the association between the dynamic scheduling PDSCH and the TRP may be performed by an implicit association between the dynamic scheduling PDSCH and a CORESET pool index by RRC. For example, the UE may assume that the CORESET pool index of the PDCCH that schedules the dynamic scheduling PDSCH (the CORESET pool index of the CORESET that detects the PDCCH) is the CORESET pool index associated with the dynamic scheduling PDSCH.

[0104] In addition, the PDSCH selection rule 2 may be applied to all TRPs, or may be applied to some TRPs but not to the remaining TRPs. For example, the UE may apply the PDSCH selection rule 2 to TRP#0 when the dynamic scheduling PDSCH associated with the same TRP and the SPS PDSCH with the SPS setting collide, but may not apply the PDSCH selection rule 2 to TRP#1 even when the dynamic scheduling PDSCH associated with the same TRP and the SPS PDSCH with the SPS setting collide.

[0105] For a TRP#1 to which the PDSCH selection rule 2 does not apply, the UE may apply the PDSCH selection rule 1 when SPS PDSCHs of the SPS configuration associated with the same TRP collide. The UE may assume that the dynamic scheduling PDSCH and one SPS PDSCH are simultaneously received for this TRP#1.

[0106] After collision handling (collision resolution, PDSCH selection) based on PDSCH selection rule 1 / 2 in each TRP, when dynamic scheduling PDSCHs / SPS PDSCHs associated with different TRPs collide in time, a UE with simultaneous reception capability may simultaneously receive these overlapping dynamic scheduling PDSCHs / SPS PDSCHs as long as the number of remaining PDSCHs (the number of PDSCHs once determined to be received (indicated as survivor PDSCHs)) j is not greater than the number of unicast PDSCHs in one slot supported by the UE.

[0107] If the number j of remaining PDSCHs is greater than the number of supported unicast PDSCHs in one slot, the UE may remove PDSCHs that satisfy at least one of the following (2.1.1) to (2.1.3) in order from the remaining PDSCHs until j is equal to or less than the number of supported unicast PDSCHs in one slot (the removed PDSCHs are not received): (2.1.1) Among the PDSCHs related to the highest CORESET pool index, the PDSCH having the highest SPS setting index; (2.1.2) PDSCH with the highest SPS setting index, (2.1.3) If multiple dynamic scheduling PDSCHs remain, the PDSCH corresponding to the highest CORESET pool index or highest TCI state ID.

[0108] 5A and 5B are diagrams illustrating an example of PDSCH selection in embodiment 2.1. In this example, four SPS configurations are activated for a serving cell. FIG. 5A illustrates an example in which, in a certain slot, there is an SPS PDSCH with SPS configuration index=0 in the 3rd to 6th symbols, there is an SPS PDSCH with SPS configuration index=1 in the 4th to 7th symbols, and there are SPS PDSCHs with SPS configuration index=2 and 3 in the 11th to 14th symbols.

[0109] Also, in this example, in the first symbol of the slot immediately before the slots in which these SPS PDSCHs are transmitted, the UE detects a PDCCH for a dynamic scheduling PDSCH, and the PDSCH scheduled by the PDCCH (dynamic scheduling PDSCH) is in the third to seventh symbols of the slots in which these SPS PDSCHs are transmitted. In this example, it is assumed that this PDCCH is detected in a CORESET with CORESET pool index=0, and the dynamic scheduling PDSCH is related to CORESET pool index=0.

[0110] When PDSCH selection rule 2 is applied for CORESET pool index=0, the PDCCH that schedules the dynamic scheduling PDSCH is completed at least 14 symbols before the earliest start symbol of the SPS PDSCH that overlaps with the dynamic scheduling PDSCH (the start symbol (third symbol) of the SPS PDSCH with SPS setting index=0), so the UE decodes the dynamic scheduling PDSCH but does not decode the SPS PDSCH that overlaps with the dynamic scheduling PDSCH.

[0111] Furthermore, when PDSCH selection rule 1 is applied to CORESET pool index=1, SPS PDSCHs with SPS setting indexes=1 and 2 remain as survivor PDSCHs.

[0112] The result of applying PDSCH selection rule 1 / 2 to Figure 5A is shown in Figure 5B. In this example, the selected PDSCHs are the dynamic scheduling PDSCH for CORESET pool index=0 and the SPS PDSCHs with SPS configuration index=1 and 2 for CORESET pool index=1.

[0113] [Embodiment 2.2] In embodiment 2.2, each SPS PDSCH in the SPS configuration is associated with a TRP. In embodiment 2.2, the same control as described above in embodiment 1.2 may be applied. For example, the above PDSCH selection rule 1 may be applied only when SPS PDSCHs associated with the same TRP collide.

[0114] Also, the above PDSCH selection rule 2 may be applied only when the dynamic scheduling PDSCH and the SPS PDSCH associated with the same TRP collide.

[0115] In addition, the PDSCH selection rule 2 may be applied to all TRPs, or may be applied to some TRPs but not to the remaining TRPs. For example, the UE may apply the PDSCH selection rule 2 to TRP#0 when the dynamic scheduling PDSCH and the SPS PDSCH associated with the same TRP collide, but may not apply the PDSCH selection rule 2 to TRP#1 even when the dynamic scheduling PDSCH and the SPS PDSCH associated with the same TRP collide.

[0116] For a TRP#1 to which the PDSCH selection rule 2 does not apply, the UE may apply the PDSCH selection rule 1 when SPS PDSCHs associated with the same TRP collide. The UE may assume that the dynamic scheduling PDSCH and one SPS PDSCH are simultaneously received for this TRP#1.

[0117] After collision handling (collision resolution, PDSCH selection) based on PDSCH selection rule 1 / 2 in each TRP, when dynamic scheduling PDSCHs / SPS PDSCHs associated with different TRPs collide in time, a UE with simultaneous reception capability may simultaneously receive these overlapping dynamic scheduling PDSCHs / SPS PDSCHs as long as the number of remaining PDSCHs (the number of PDSCHs once determined to be received (indicated as survivor PDSCHs)) j is not greater than the number of unicast PDSCHs in one slot supported by the UE.

[0118] If the number j of remaining PDSCHs is greater than the number of supported unicast PDSCHs in one slot, the UE may remove PDSCHs that satisfy at least one of the following (2.1.1) to (2.1.4) in order from the remaining PDSCHs until j is equal to or less than the number of supported unicast PDSCHs in one slot (the removed PDSCHs are not received): (2.1.1) Among the PDSCHs related to the highest CORESET pool index, the PDSCH having the highest SPS setting index; (2.1.2) PDSCH with the highest SPS setting index, (2.1.3) Among the PDSCHs related to the highest CORESET pool index, the PDSCH corresponding to the highest TCI state ID; (2.1.4) If multiple dynamic scheduling PDSCHs remain, the PDSCH corresponding to the highest CORESET pool index or highest TCI state ID.

[0119] According to the second embodiment described above, in the mDCI-based MTRP, even if the dynamic scheduling PDSCH overlaps in time with the SPS PDSCH, the UE can appropriately determine the PDSCH to be decoded.

[0120] <Third embodiment> The third embodiment relates to determining a PDSCH to be received (decoded) in a case where a dynamic scheduling PDSCH overlaps (duplicates) in time with an SPS PDSCH in sDCI-based MTRP.

[0121] In the third embodiment, when one TCI state is designated for a dynamic scheduling PDSCH, the above-mentioned PDSCH selection rule 2 may be applied to the collision of the dynamic scheduling PDSCH and the SPS PDSCH regardless of the TRP. In other words, the UE may decode the dynamic scheduling PDSCH if it satisfies the 14-symbol timeline shown in the PDSCH selection rule 2.

[0122] In the third embodiment, when one TCI state is designated for a dynamic scheduling PDSCH, the UE may consider this dynamic scheduling PDSCH to be associated with a first TRP (e.g., a TRP corresponding to TRP ID #1). In this case, the association between the SPS configuration / SPS PDSCH and the TRP may be as described in the second embodiment, and the PDSCH selection rule of the second embodiment may be as described in the second embodiment when a collision occurs within the TRP.

[0123] In the third embodiment, when two TCI states are specified for a dynamic scheduling PDSCH, the above-mentioned PDSCH selection rule 2 may be applied to the collision of the dynamic scheduling PDSCH and the SPS PDSCH regardless of the TRP. In other words, the UE may decode the dynamic scheduling PDSCH if it satisfies the 14-symbol timeline shown in the PDSCH selection rule 2.

[0124] In addition, in the third embodiment, when two TCI states are specified for a dynamic scheduling PDSCH, the UE may decode SPS PDSCHs having a TCI state that has the same QCL type D (or is related to QCL type D) as at least one of the two TCI states for the dynamic scheduling PDSCH, starting from the smaller SPS configuration index, as long as the number of remaining PDSCHs (the number of PDSCHs to be decoded) j is not greater than the number of unicast PDSCHs in one slot supported by the UE.

[0125] [Modification of the third embodiment] In a variation of the third embodiment, in the sDCI-based MTRP, for each SPS configuration, one or more (eg, two) TCI states may be configured / activated / indicated for the SPS PDSCH.

[0126] If one TCI state is configured / activated / indicated for the SPS PDSCH, the PDSCH determination already described above in the third embodiment for the case where one or two TCI states are specified for the dynamic scheduling PDSCH may also be applied.

[0127] When two TCI states are configured / activated / indicated for an SPS PDSCH, the first TCI state and the second TCI state may be applied to two parts of the DMRS port of the SPS PDSCH, similar to the dynamically scheduled PDSCH in sDCI-based MTRP.

[0128] When two TCI states are configured / activated / indicated for an SPS PDSCH and one TCI state is designated for a dynamic scheduling PDSCH, the above PDSCH selection rule 2 may be applied to the collision of the dynamic scheduling PDSCH and the SPS PDSCH regardless of TRP. In other words, the UE may decode the dynamic scheduling PDSCH if it meets the 14-symbol timeline shown in the PDSCH selection rule 2.

[0129] In addition, when two TCI states are configured / activated / indicated for an SPS PDSCH and one TCI state is designated for a dynamic scheduling PDSCH, the UE may decode SPS PDSCHs having at least one TCI state that has the same QCL type D (or is related to QCL type D) as the TCI state for the dynamic scheduling PDSCH, starting from the SPS PDSCH with the smaller SPS configuration index, as long as the number of remaining PDSCHs (the number of PDSCHs to be decoded) j is not greater than the number of unicast PDSCHs in one slot supported by the UE.

[0130] When two TCI states are configured / activated / indicated for the SPS PDSCH and two TCI states are specified for the dynamic scheduling PDSCH, the above PDSCH selection rule 2 may be applied to the collision of the dynamic scheduling PDSCH and the SPS PDSCH regardless of TRP. In other words, the UE may decode the dynamic scheduling PDSCH if it meets the 14-symbol timeline shown in the PDSCH selection rule 2.

[0131] In addition, when two TCI states are configured / activated / indicated for an SPS PDSCH and two TCI states are specified for a dynamic scheduling PDSCH, the UE may decode SPS PDSCHs having two TCI states that have the same QCL type D (or that are related to QCL type D) as the two TCI states for the dynamic scheduling PDSCH, starting from the SPS PDSCH with the smaller SPS configuration index, as long as the number of remaining PDSCHs (the number of PDSCHs to be decoded) j is not greater than the number of unicast PDSCHs in one slot supported by the UE.

[0132] According to the third embodiment described above, in the sDCI-based MTRP, even if the dynamic scheduling PDSCH overlaps in time with the SPS PDSCH, the UE can appropriately determine the PDSCH to be decoded.

[0133] <Other embodiments> At least one of the above embodiments may be applied only to UEs that have reported or support a particular UE capability.

[0134] The specific UE capabilities may indicate at least one of the following: Whether to support SPS setting for MTRP; Whether to support SPS settings related to TRP / CORESET pool index / group ID, ·Whether to support SPS PDSCH for SPS settings related to TRP / CORESET pool index / group ID; Whether to support configuration / activation / indication of two TCI states for SPS PDSCH; Whether or not to support simultaneous reception of multiple SPS PDSCHs (from MTRPs) that overlap in time; ·Whether to support simultaneous reception of a dynamically scheduled (from MTRP) PDSCH (with 1 or 2 TCI states) and an SPS PDSCH (with 1 or 2 TCI states) that overlap in time.

[0135] At least one of the above-described embodiments may be applied when the UE is configured with specific information related to the above-described embodiments by higher layer signaling. For example, the specific information may be information indicating that the MTRP / sDCI-based MTRP / mDCI-based MTRP is enabled, any RRC parameter for a specific release (e.g., Rel. 17), etc.

[0136] (Wireless communication systems) A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination of these methods.

[0137] 6 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0138] Furthermore, the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0139] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN) and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN and the LTE (E-UTRA) base station (eNB) is the SN.

[0140] The wireless communication system 1 may support dual connectivity between multiple base stations in the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0141] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged in the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located in at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as a base station 10.

[0142] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0143] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

[0144] Furthermore, the user terminal 20 may perform communication in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0145] The multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0146] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0147] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0148] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

[0149] The radio access scheme may be called a waveform. In the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0150] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as a downlink channel.

[0151] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0152] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0153] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information of at least one of the PDSCH and the PUSCH.

[0154] In addition, DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

[0155] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or multiple search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0156] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in the present disclosure may be read as interchangeable terms.

[0157] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0158] In the present disclosure, a downlink, an uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning of the channels.

[0159] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0160] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) may be called an SS / PBCH block, an SS Block (SSB), or the like. In addition, the SS, SSB, and the like may also be called a reference signal.

[0161] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may be called a user equipment specific reference signal (UE-specific reference signal).

[0162] (base station) 7 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0163] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0164] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0165] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission and reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0166] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0167] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0168] The transmitting / receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0169] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0170] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0171] The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0172] The transceiver 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0173] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna .

[0174] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna .

[0175] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0176] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0177] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data) for the user terminal 20, control plane data, etc.

[0178] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0179] In addition, the transceiver unit 120 may transmit a Semi-Persistent Scheduling Physical Downlink Shared Channel (SPS PDSCH) to the user terminal 20.

[0180] The control unit 110 may assume that the user terminal 20 selects only one of the multiple SPS PDSCHs when the multiple SPS PDSCHs that overlap in time are associated with the same particular index (eg, the same CORESET pool index).

[0181] Furthermore, the transceiver unit 120 may transmit a dynamic scheduling downlink shared channel (Physical Downlink Shared Channel (PDSCH)) to the user terminal 20.

[0182] The control unit 110 may assume that the user terminal 20 decodes the dynamic scheduling PDSCH if the dynamic scheduling PDSCH and the semi-persistent scheduling PDSCH that overlap in time are associated with the same particular index.

[0183] (User terminal) 8 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0184] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0185] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0186] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission / reception unit 220.

[0187] The transmitting / receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitting / receiving unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting / receiving circuit, and the like, which are described based on common understanding in the technical field related to the present disclosure.

[0188] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0189] The transmitting / receiving antenna 230 can be composed of an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

[0190] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0191] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0192] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0193] The transceiver 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit sequence to be transmitted, and output a baseband signal.

[0194] Whether or not to apply the DFT process may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver 220 (transmission processor 2211) may perform the DFT process as the transmission process to transmit the channel using a DFT-s-OFDM waveform, and may not perform the DFT process as the transmission process if transform precoding is enabled for the channel.

[0195] The transceiver unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna 230.

[0196] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna 230.

[0197] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0198] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0199] In addition, the transmitting section and the receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0200] In addition, the control unit 210 may select only one of multiple Semi-Persistent Scheduling Physical Downlink Shared Channels (SPS PDSCHs) that overlap in time when the SPS PDSCHs are associated with the same specific index (e.g., the same CORESET pool index).

[0201] The transceiver unit 220 may receive the selected SPS PDSCH. Note that in the present disclosure, the terms "receive" and "decode" may be interpreted as interchangeable.

[0202] The control unit 210 may determine that the specific index corresponding to a certain SPS PDSCH is a control resource set pool index of a downlink control channel that activates an SPS configuration of the SPS PDSCH.

[0203] The transceiver 220 may simultaneously receive multiple SPS PDSCHs that overlap in time, if the multiple SPS PDSCHs are associated with different specific indices and the number of PDSCHs to be decoded is not greater than the number of supported unicast PDSCHs in one slot.

[0204] When multiple SPS PDSCHs that overlap in time are associated with different specific indexes and the number of PDSCHs to be decoded is greater than the number of unicast PDSCHs supported in one slot, the transceiver unit 220 may exclude the PDSCH having the highest SPS setting index from the PDSCHs associated with the highest specific index from those to be received.

[0205] In addition, the control unit 210 may control decoding of a dynamic scheduling physical downlink shared channel (PDSCH) that overlaps in time and a semi-persistent scheduling PDSCH that is associated with the same specific index (e.g., the same CORESET pool index).

[0206] The transceiver 220 may decode the dynamic scheduling PDSCH when a condition for decoding the dynamic scheduling PDSCH (for example, a timeline of 14 symbols from the PDCCH in PDSCH selection rule 2) is met.

[0207] The control unit 210 may determine that the specific index corresponding to the dynamic scheduling PDSCH is a control resource set pool index of a downlink control channel that schedules the dynamic scheduling PDSCH.

[0208] The transceiver 220 may simultaneously receive a dynamic scheduling PDSCH and an SPS PDSCH that overlap in time, if the dynamic scheduling PDSCH and the SPS PDSCH are associated with different specific indices and the number of PDSCHs to be decoded is not greater than the number of unicast PDSCHs supported in one slot.

[0209] When a dynamic scheduling PDSCH and an SPS PDSCH that overlap in time are associated with different specific indexes and the number of PDSCHs to be decoded is greater than the number of unicast PDSCHs supported in one slot, the transceiver unit 220 may exclude a PDSCH having a highest SPS setting index from the PDSCHs associated with the highest specific index from those to be received.

[0210] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically combined, or may be realized by using two or more devices that are physically or logically separated and directly or indirectly connected (for example, by wire, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0211] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission may be called a transmitting unit, a transmitter, and the like. In either case, as described above, the method of realization is not particularly limited.

[0212] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 9 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0213] In this disclosure, the terms "apparatus," "circuit," "device," "section," "unit," and the like can be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0214] For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processes may be performed by one processor, or the processes may be performed by two or more processors simultaneously, sequentially, or in other manners. Also, the processor 1001 may be implemented by one or more chips.

[0215] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0216] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0217] Moreover, the processor 1001 reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to the programs. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks may be realized in a similar manner.

[0218] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be called a register, a cache, a main memory (primary storage device), and the like. The memory 1002 can store a program (program code), a software module, and the like that is executable to implement a wireless communication method according to an embodiment of the present disclosure.

[0219] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0220] The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0221] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0222] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0223] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0224] (Modification) In addition, the terms explained in this disclosure and the terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be read as mutually interchangeable. A signal may also be a message. A reference signal may also be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applied standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, etc.

[0225] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0226] Here, the numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0227] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may also be a time unit based on numerology.

[0228] A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0229] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. A different name may be used for the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be read as interchangeable with each other.

[0230] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0231] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0232] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0233] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0234] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc.

[0235] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0236] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0237] In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. Each of one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0238] In addition, one or more RBs may be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0239] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0240] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a numerology on a carrier, where the common RBs may be identified by the index of the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0241] The BWP may include a UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0242] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given channel / signal outside the active BWP. Note that the terms "cell", "carrier", etc. in this disclosure may be replaced with "BWP".

[0243] The above-mentioned structures of radio frames, subframes, slots, minislots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

[0244] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0245] The names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0246] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0247] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via a plurality of network nodes.

[0248] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0249] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0250] The physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, by using a MAC Control Element (CE).

[0251] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0252] The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or by comparing numerical values ​​(e.g., with a predetermined value).

[0253] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0254] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0255] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0256] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," and the like may be used interchangeably.

[0257] In this disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0258] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0259] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0260] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0261] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may include a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0262] Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may be read as a side channel.

[0263] Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0264] In the present disclosure, an operation performed by a base station may be performed by its upper node in some cases. It is clear that in a network including one or more network nodes having base stations, various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0265] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be reordered unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0266] Each aspect / embodiment described in the present disclosure may be implemented using any of a wide variety of standards, including Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems using 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other appropriate wireless communication methods, next-generation systems that are based on these, etc. Also, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0267] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0268] Any reference to an element using a designation such as "first," "second," etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.

[0269] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, and the like.

[0270] A "determining" may also be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.

[0271] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. That is, "determination" may be considered to be "deciding" to perform some action.

[0272] Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

[0273] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0274] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples.

[0275] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0276] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0277] In this disclosure, where articles have been added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0278] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modified and altered forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the invention according to the present disclosure.

Claims

1. A control unit that determines a transmission configuration indication (TCI) state of a semi-persistent scheduling (SPS) downlink shared channel (PDSCH) using multiple transmission / reception points (MTRP) based on downlink control information (DCI) for activating a semi-persistent scheduling (SPS) configuration; A terminal comprising: a receiving unit for receiving an SPS PDSCH corresponding to the TCI state.

2. Determining a transmission configuration indication (TCI) state of a semi-persistent scheduling (SPS) downlink shared channel (PDSCH) using multiple transmission / reception points (MTRPs) based on downlink control information (DCI) for activating a semi-persistent scheduling (SPS) configuration; receiving an SPS PDSCH corresponding to the TCI state.

3. A control unit that indicates a transmission configuration indication (TCI) state of an SPS downlink shared channel (PDSCH) using multiple transmission / reception points (MTRP) based on downlink control information (DCI) for activating a semi-persistent scheduling (SPS) configuration; A base station comprising: a transmitter for transmitting an SPS PDSCH corresponding to the TCI state.

4. A system including a terminal and a base station, The terminal includes: A control unit that determines a transmission configuration indication (TCI) state of a semi-persistent scheduling (SPS) downlink shared channel (PDSCH) using multiple transmission / reception points (MTRP) based on downlink control information (DCI) for activating a semi-persistent scheduling (SPS) configuration; A receiving unit for receiving an SPS PDSCH corresponding to the TCI state, The base station, A transmitter for transmitting an SPS PDSCH corresponding to the TCI state.

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