Terminal, wireless communication method and base station

Abstract

A terminal according to one embodiment of the present disclosure has a reception unit for receiving configuration information for a physical uplink control channel (PUCCH) that is triggered in a narrower bandwidth than one physical resource block (PRB), and a control unit for determining the sequence of demodulation reference signals (DMRS) for the PUCCH. This one embodiment of the present disclosure makes it possible to appropriately set / indicate a UL channel / signal and / or determine a reference signal / UL signal relating to the UL channel.

Description

[Technical Field]

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

[0002] In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) was specified with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Also, LTE-Advanced (3GPP Rel. 10-14) was specified with the aim of achieving higher capacity and more advanced features than 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) are also being considered. [Prior art documents] [Non-patent literature]

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

[0005] In future wireless communication systems (e.g., NR), it is being considered that a terminal (user terminal, User Equipment (UE)) will transmit at least one of an uplink (UL) channel and a signal using a frequency resource smaller than a specific frequency resource (e.g., one physical resource block (PRB)).

[0006] However, when transmitting an UL channel / signal using a frequency resource smaller than the specific frequency resource, there has been insufficient consideration of the resource setting / indication method and the method of determining a reference signal (e.g., a demodulation reference signal (DMRS)) / UL signal for the UL channel. If these considerations are insufficient, it may be impossible to improve coverage, and an increase in communication throughput may be inhibited.

[0007] Therefore, one of the objectives of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately perform at least one of setting / instructing an UL channel / signal and determining a reference signal / UL signal related to the UL channel. [Means for solving the problem]

[0008] A terminal according to one embodiment of the present disclosure includes a receiving unit that receives configuration information for a physical uplink control channel (PUCCH) triggered in a bandwidth narrower than one physical resource block (PRB), and a control unit that determines a demodulation reference signal (DMRS) sequence for the PUCCH. The control unit determines the PUCCH resource based on a correspondence relationship between a PRB index and a sub-PRB index related to a bandwidth narrower than one PRB, and the sub-PRB indexes are consecutively numbered within one PRB index. do. [Effects of the Invention]

[0009] According to one aspect of the present disclosure, at least one of setting / instructing an UL channel / signal and determining a reference signal / UL signal related to the UL channel can be appropriately performed. [Brief explanation of the drawings]

[0010] [Figure 1] 1A and 1B are diagrams showing an example of the transmission power of UL channels / signals. [Figure 2] 2A and 2B are diagrams showing an example of PUSCH / PUCCH allocation. [Figure 3] 3A to 3E are diagrams illustrating an example of a PUCCH format in Rel. 15 NR. [Figure 4] FIG. 4 is a diagram illustrating an example of UCI transmission using PF0. [Figure 5] 5A and 5B are diagrams showing an example of a cyclic shift index for PF0. [Figure 6] FIG. 6 is a diagram illustrating an example of UCI transmission using PF1. [Figure 7] FIG. 7 is a diagram showing an example of mapping of PF2. [Figure 8] FIG. 8 is a diagram illustrating an example of DMRS mapping. [Figure 9] FIG. 9 is a diagram illustrating an example of DMRS mapping according to the first embodiment. [Figure 10] FIG. 10 is a diagram illustrating an example of allocation of UL channels and DMRSs of sub-PRBs according to the first embodiment. [Figure 11] FIG. 11 is a diagram showing an example of mapping of UL channels and DMRSs according to Variation 1. In FIG. [Figure 12] FIG. 12 is a diagram showing another example of mapping of UL channels and DMRSs according to Variation 1. In FIG. [Figure 13] FIG. 13 is a diagram showing an example of mapping of UL channels / signals and DMRSs for multiple UEs according to Variation 1. In FIG. [Figure 14] FIG. 14 is a diagram illustrating an example of mapping of DMRS according to embodiment 2-1. [Figure 15] FIG. 15 is a diagram illustrating an example of mapping of UL channels / signals for a plurality of UEs according to embodiment 2-1. [Figure 16]FIG. 16 is a diagram illustrating an example of determining a DMRS according to embodiment 2-2-1. [Figure 17] FIG. 17 is a diagram illustrating an example of determining a DMRS according to embodiment 2-2-2. [Figure 18] FIG. 18 is a diagram illustrating an example of mapping of UL channels / signals for a plurality of UEs according to embodiment 2-2. [Figure 19] FIG. 19 is a diagram illustrating an example of generation of a DMRS sequence according to embodiment 2-3. [Figure 20] FIG. 20 is a diagram showing an example of an FDRA field according to embodiment 3-1-2. [Figure 21] FIG. 21 is a diagram illustrating an example of a resource indication for a UL channel / signal according to embodiment 3-2. [Figure 22] 22A and 22B are diagrams illustrating an example of UL channel mapping according to embodiment 4-1. [Figure 23] 23A and 23B are diagrams showing an example of the correspondence between PRB indexes and sub-PRB indexes according to embodiment 4-2. [Figure 24] 24A and 24B are diagrams showing an example of derivation of a CS index in Rel.15. [Figure 25] 25A and 25B are diagrams illustrating an example of derivation of a CS index for a sub-PRB PUCCH. [Figure 26] FIG. 26 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 27] FIG. 27 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 28] FIG. 28 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 29] FIG. 29 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. [Figure 30] FIG. 30 is a diagram illustrating an example of a vehicle according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] (UL channel / signal coverage improvement) In Rel. 17 and later, in order to improve the coverage of UL channels / signals (e.g., Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH)), it is being considered to transmit UL channels / signals using frequency resources (e.g., bandwidth) smaller than a specific frequency resource (e.g., 1 PRB).

[0012] The maximum transmit power of a UE's UL channel / signal is typically set to a specific value (e.g., 23 dBm). The power spectrum density (PSD) is determined by transmission power control (TPC), and the actual transmit power is determined by integrating (multiplying) the PSD by the bandwidth (allocated PRB).

[0013] Figure 1A shows an example of the transmit power of an UL channel / signal. In the example shown in Figure 1A, the maximum transmit power of the UE is 23 dBm. If the bandwidth of the UL channel / signal is set relatively narrower for the UE than in Figure 1B, which will be described later, the power density (PSD) can be increased.

[0014] Figure 1B shows another example of the transmit power of the UL channel / signal. In the example shown in Figure 1B, the maximum transmit power of the UE is 23 dBm, as in Figure 1A. If the bandwidth of the UL channel / signal is set relatively wider for the UE than in Figure 1A, the power density will be lower.

[0015] In this way, by reducing the bandwidth for transmitting UL channels / signals, coverage improvement / link budget improvement can be expected due to the power boosting effect.

[0016] As mentioned above, in Rel. 17 and later, it is being considered to support transmission using frequency resources (e.g., bandwidth) smaller than a specific frequency resource (e.g., 1 PRB) in order to improve the coverage of UL channels / signals (e.g., PUSCH / PUCCH).

[0017] For example, by making it possible to set the transmission bandwidth of PUSCH / PUCCH smaller than 1 PRB, which is the minimum allocated bandwidth in the existing (Rel. 15 / 16) NR, it is expected that the coverage of PUSCH / PUCCH will be improved.

[0018] 2A is a diagram illustrating an example of allocation of PUSCH / PUCCH. FIG. 2A illustrates an example of allocation of PUSCH / PUCCH to one PRB of existing NR.

[0019] 2B is a diagram showing another example of allocation of PUSCH / PUCCH, and shows an example of allocating PUSCH / PUCCH to frequency resources smaller than one PRB.

[0020] In this disclosure, an UL channel / signal allocated to a frequency resource smaller than one PRB may be referred to as a sub-PRB UL channel / signal or a sub-PRB UL channel / signal. Also, a frequency resource (bandwidth) smaller (less / narrower) than one PRB may be referred to as a sub-PRB.

[0021] Furthermore, by making it possible to set the transmission bandwidth of PUSCH / PUCCH to be smaller than 1 PRB, not only is the coverage improved as described above expected, but the effect of improving frequency utilization efficiency is also expected.

[0022] For example, for the PUSCH of the sub-PRB, one PRB can be allocated to multiple UEs, improving frequency utilization efficiency.

[0023] Furthermore, for PUCCH, certain PUCCH formats in existing NR (e.g., PUCCH format 4) use code division multiplexing (CDM (frequency domain (FD) OCC)) for inter-UE multiplexing. FD OCC does not provide complete orthogonality between UEs in environments with strong frequency selectivity, which can lead to the possibility of inter-UE interference. By using sub-PRB PUCCH, complete orthogonality can be achieved through frequency division multiplexing, reducing inter-UE interference and improving performance compared to existing PUCCH format 4.

[0024] (PUCCH format) In NR, a configuration (format, also called PUCCH format (PF)) for an uplink control channel (e.g., PUCCH) is used to transmit uplink control information (UCI). For example, Rel. 15 NR supports five types of PFs, 0 to 4, as shown in Figures 3A to 3E. Note that in Rel. 17 and later, the names of the PFs shown below are merely examples, and different names may be used.

[0025] For example, PF0 and PF1 are PFs used to transmit UCI of up to 2 bits. For example, the UCI may be at least one of acknowledgement information (also called Hybrid Automatic Repeat reQuest-Acknowledgement (HARQ-ACK), acknowledgement (ACK), or negative-acknowledgement (NACK)) and scheduling request (SR). PF0 can be assigned to one or two symbols, and is therefore also called a short PUCCH or a sequence-based short PUCCH. On the other hand, PF1 can be assigned to four to fourteen symbols, and is therefore also called a long PUCCH. PF0 may transmit a sequence obtained by cyclic shifting a base sequence using a cyclic shift (CS) corresponding to the UCI value. In PF1, multiple user terminals may be code-division multiplexed (CDM) within the same physical resource block (PRB) by block spreading in the time domain using at least one of CS and time-domain (TD)-orthogonal cover code (OCC). PF0 and PF1 may be mapped to one PRB.

[0026] PF2-PF4 are PFs used to transmit UCI of more than 2 bits (for example, Channel State Information (CSI) or at least one of CSI, HARQ-ACK, and SR). PF2 can be allocated to 1 or 2 symbols and is therefore also called a short PUCCH, etc. PF3 and PF4 can be allocated to 4-14 symbols and are therefore also called long PUCCH, etc. PF4 may perform CDM for multiple user terminals using pre-DFT (frequency domain (FD)-OCC) block spreading. PF2 and PF3 may be mapped to 1 to 16 PRBs. PF4 may be mapped to 1 PRB.

[0027] For PF2 shown in Fig. 3C, a DMRS is mapped every three subcarriers. For simplicity, the DMRS for every three subcarriers is not shown in Fig. 3C.

[0028] Intra-slot frequency hopping may be applied to PF1, PF3, and PF4. symb Then, the length before frequency hopping (first hop) is floor(N symb / 2), and the length after frequency hopping (second hop) is ceil(N symb / 2).

[0029] The waveforms of PF0, PF1, and PF2 may be Cyclic Prefix (CP)-Orthogonal Frequency Division Multiplexing (OFDM), and the waveforms of PF3 and PF4 may be Discrete Fourier Transform (DFT)-spread(s)-OFDM.

[0030] The allocation of resources (for example, PUCCH resources) used for transmitting the uplink control channel is performed using higher layer signaling and / or downlink control information (DCI).

[0031] Specifically, one or more sets (PUCCH resource sets), each including one or more PUCCH resources, are notified (configured) to a UE by higher layer signaling. For example, a network (e.g., a base station) may notify a user terminal of K (e.g., 1≦K≦4) PUCCH resource sets. Each PUCCH resource set may include M (e.g., 1≦M≦32) PUCCH resources.

[0032] The UE may determine a single PUCCH resource set (first PUCCH resource set) from the configured K PUCCH resource sets based on the payload size of the UCI (UCI payload size, number of UCI information bits). The UCI payload size may be the number of UCI bits excluding Cyclic Redundancy Check (CRC) bits.

[0033] The UE may determine a PUCCH resource to be used for transmitting UCI from the M PUCCH resources included in the determined PUCCH resource set based on at least one of DCI and implicit information (also referred to as implicit indication information or implicit index, etc.). For example, the implicit indication information may be a first CCE index of a PDCCH receiving the DCI.

[0034] Each PUCCH resource configured for a UE may include a value of at least one of the following parameters (also referred to as a field or information, etc.): Note that a range of values ​​that each parameter can take may be defined for each PUCCH format. Symbol at which PUCCH allocation starts (start symbol) Number of symbols allocated to PUCCH within a slot (period allocated to PUCCH) Index of the resource block (PRB: Physical Resource Block) where PUCCH allocation starts Number of PRBs allocated to PUCCH Whether to enable frequency hopping for PUCCH - Second hop frequency resource and initial cyclic shift (CS) index when frequency hopping is enabled The index of the orthogonal spreading code (e.g., OCC: Orthogonal Cover Code) in the time domain, the length of the OCC used for block spreading before the Discrete Fourier Transform (DFT) (also called the OCC length, spreading factor, etc.) The OCC index used for block-wise spreading after DFT.

[0035] PF0 or PF1 uses the sequence.

[0036] As shown in FIG. 4, for PF0, the UE determines α corresponding to the initial cyclic shift A and the value of UCI (at least one of HARQ-ACK and SR). x Using cyclic shifts (phase rotations) based on 11 The sequence obtained by applying the cyclic shift to each PRB is mapped to one PRB. The initial cyclic shift A may be set using higher layer signaling. For example, as shown in FIG. 5A, the cyclic shift α corresponding to 1-bit HARQ-ACK information {0,1} is x The index x of each bit is 0 and 6. For example, as shown in FIG. 5B, the cyclic shift α x The index x of each is 0, 3, 6, and 9. x may be the index x.

[0037] As shown in FIG. 6, for PF1, the UE maps the signals obtained by multiplying each of the modulated and channel-coded UCI symbols and DMRS symbols by a 12-bit base sequence and a sequence based on cyclic shift and TD-OCC to one PRB.

[0038] In the present disclosure, the sequence is mapped in the decreasing frequency direction, but the sequence may be mapped in the increasing frequency direction.

[0039] In Rel. 15, constant amplitude zero auto-correlation (CAZAC) sequences are defined as low Peak to Average Power Ratio (PAPR) sequences for lengths of 36 or greater. For lengths shorter than 36, computer-generated sequences (CGS) are defined, taking into account PAPR and cross-correlation. CAZAC sequences with prime lengths achieve an ideal PAPR (i.e., PAPR = 1); otherwise, the PAPR degrades.

[0040] At higher frequencies, it is desirable to reduce the PAPR.

[0041] In PF2 (short PUCCH) of Rel.15 NR, DMRS and UCI are frequency division multiplexed (FDM) as shown in Figure 7. DMRS may be mapped to one of every three subcarriers. UCI may be mapped to the remaining subcarriers. The waveform of PF2 is CP-OFDM. Therefore, the PAPR of PF2 is high, and performance deteriorates at high frequencies.

[0042] (DMRS for PUSCH / PUCCH) In Rel. 15 / 16, multiple types (type 1 and type 2) of DMRS for PUSCH are supported.

[0043] The type of DMRS may also be referred to as a DMRS configuration type.

[0044] When the PUSCH waveform is DFT-s-OFDM (when transform precoding is enabled), DMRS type 1 can be applied as the DMRS for the PUSCH.

[0045] For orthogonalization of MIMO layers, a multi-port DMRS is used.

[0046] For example, in single user MIMO (SU-MIMO), a different DMRS port may be configured for each layer. In multi user MIMO (MU-MIMO), a different DMRS port may be configured for each layer within one UE and for each UE.

[0047] In Rel. 15 / 16, multi-port DMRS supports up to eight ports for Type 1 DMRS (DMRS configuration type 1) and up to 12 ports for Type 2 DMRS (DMRS configuration type 2) by using Frequency Division Multiplexing (FDM), Frequency Domain Orthogonal Cover Code (FD-OCC), Time Domain OCC (TD-OCC), etc.

[0048] In Rel.15 / 16, a comb-like transmission frequency pattern (comb-like resource set) is used for the FDM. Cyclic Shift (CS) is used for the FD-OCC. Furthermore, TD-OCC can only be applied to double-symbol DMRS.

[0049] The OCC in the present disclosure may be interchangeably read as orthogonal code, orthogonalization, cyclic shift, FD OCC, TD OCC, and the like.

[0050] Among DMRSs, a DMRS that is resource mapped in units of two consecutive (adjacent) symbols may be called a double-symbol DMRS, and a DMRS that is resource mapped in units of one symbol may be called a single-symbol DMRS.

[0051] Either DMRS may be mapped to one or more symbols per slot depending on the length of the data channel. A DMRS mapped to the beginning of a data symbol may be called a front-loaded DMRS, and a DMRS mapped to another position may be called an additional DMRS.

[0052] In the case of DMRS Type 1 and single-symbol DMRS, combs and CSs may be used for orthogonalization. For example, up to four antenna ports (APs) may be supported by using two types of combs and two types of CSs (Comb2+2CS).

[0053] In the case of DMRS configuration type 1 and double-symbol DMRS, comb, CS, and TD-OCC may be used for orthogonalization. For example, up to eight APs may be supported using two types of comb, two types of CS, and TD-OCC ({1,1} and {1,-1}).

[0054] In the case of DMRS Type 2 and single-symbol DMRS, FD-OCC may be used for orthogonalization. For example, up to six APs may be supported by applying an orthogonal code (2-FD-OCC) to two adjacent resource elements (REs) in the frequency direction.

[0055] In the case of DMRS Type 2 and double-symbol DMRS, FD-OCC and TD-OCC may be used for orthogonalization. For example, up to 12 APs may be supported by applying an orthogonal code (2-FD-OCC) to two adjacent REs in the frequency direction and TD-OCC ({1,1} and {1,-1}) to two adjacent REs in the time direction.

[0056] A group of DMRS ports that are orthogonalized by FD-OCC / TD-OCC is also called a Code Division Multiplexing (CDM) group.

[0057] One CDM group corresponds to a maximum of two-port DMRS (maximum of 2 MIMO PUSCH).

[0058] In MU-MIMO, different CDM groups are configured for different UEs.

[0059] 8 shows an example of DMRS mapping. In DMRS Type 1, two CDM groups (CDM groups 0 and 1) are configured, and DMRS mapping is performed using the combs of CDM group 0 and CDM group 1. The combs of CDM group 0 and CDM group 1 are each mapped to every other subcarrier.

[0060] In DMRS Type 2, three CDM groups (CDM groups 0 to 2) are configured, and DMRSs are mapped using the combs of CDM group 0, CDM group 1, and CDM group 2. The combs of each CDM group are mapped to two adjacent subcarriers, and are mapped every four subcarriers.

[0061] Multiple types (type 1 and type 2) of low PAPR sequences used in DMRS for PUSCH are supported.

[0062] The low PAPR sequence generation type 1 may be a sequence using a Quadrature Phase Shift Keying (QPSK)-based CGS and a Zadoff-Chu (ZC) sequence.

[0063] The low PAPR sequence generation type 2 may be a sequence in which a π / 2-Binary Phase Shift Keying (BPSK)-based CGS and a pseudo noise (PN) sequence are used.

[0064] Regarding the sequence length of the low PAPR sequence, the sequence length of the CGS may be any of 6, 12, 18, or 24. Furthermore, the sequence length of the ZC sequence can be any number equal to or greater than 36. By generating a ZC sequence and applying cyclic repetition to the generated ZC sequence, it is possible to generate a sequence of any sequence length.

[0065] In Rel. 15 / 16, the DMRS for PUCCH may be mapped to consecutive subcarriers (REs).

[0066] The low PAPR sequence for the PUCCH is similar to the low PAPR sequence for the PUSCH described above.

[0067] The NR CGS sequence is generated by a computer to have low PAPR, autocorrelation, and cross-correlation. In general, the longer the sequence length, the better the performance of the sequence, not just for CGS.

[0068] However, when transmitting an UL channel / signal using a frequency resource smaller than a specific frequency resource (e.g., 1 PRB), there has been insufficient consideration on the method of setting / indicating resources and the method of determining a reference signal (e.g., a demodulation reference signal (DMRS)) / UL signal related to the UL channel.

[0069] The existing NR standard specifies only the allocation of UL channels / signals that are equal to or larger than a specific frequency resource (e.g., 1 PRB) and a method for determining the DMRS for the allocation. In other words, there has been insufficient consideration of a method for determining the sequence length / mapping pattern of the DMRS for UL channels / signals that use frequency resources smaller than the specific frequency resource (e.g., 1 PRB).

[0070] If these considerations are not sufficient, it may not be possible to improve coverage, and an increase in communication throughput may be inhibited.

[0071] Therefore, the present inventors have conceived a method for setting / indicating resources and a method for determining a reference signal (e.g., a demodulation reference signal (DMRS)) / UL signal for an UL channel when transmitting an UL channel / signal using a frequency resource smaller than a specific frequency resource (e.g., 1 PRB).

[0072] 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.

[0073] Hereinafter, the UL channel / signal (e.g., PUSCH / PUCCH) in the present disclosure will be described assuming that the UL channel / signal is a UL channel / signal to which a waveform using a low PAPR sequence is applied, but is not limited to this. For example, the PUSCH to which a waveform using a low PAPR sequence is applied may be a PUCCH to which DFT-s-OFDM is applied, but is not limited to this. Furthermore, for example, the PUCCH to which a waveform using a low PAPR sequence is applied may be a PUCCH using PUCCH format 0 / 1 / 3 / 4, but is not limited to this.

[0074] Furthermore, although frequency resources smaller than 1 PRB will be mainly described as specific frequency resources in the present disclosure below, the size of the frequency resources and the unit of the frequency resources are not limited to this.

[0075] Furthermore, although the following description of channels / signals in the present disclosure mainly focuses on UL channels / signals, the channels / signals in the present disclosure may also be downlink (DL) channels / signals. That is, in the present disclosure, uplink, uplink, and UL may be appropriately replaced with downlink, downlink, and DL, respectively. When the present disclosure is applied to DL, the multiplexing capacity of multiple UEs / channels / signals can be improved.

[0076] Furthermore, although PUSCH and PUCCH will be mainly described as UL channels / signals in the present disclosure, the UL channels / signals in the present disclosure may be any UL channels / signals (for example, SRS / PRACH, etc.).

[0077] In the present disclosure, "A / B" and "at least one of A and B" may be interpreted interchangeably. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0078] In the present disclosure, terms such as activate, deactivate, indicate (or indicate), select, configure, update, and determine may be read interchangeably. In the present disclosure, terms such as support, control, controllable, operate, and operate may be read interchangeably.

[0079] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, information elements (IEs), configurations, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0080] In the present disclosure, higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like, or a combination thereof.

[0081] In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. 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.

[0082] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0083] In this disclosure, the terms index, identifier (ID), indicator, resource ID, etc. may be interchangeable. In this disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0084] In this disclosure, the terms panel, UE panel, panel group, beam, beam group, precoder, Uplink (UL) transmitting entity, Transmission / Reception Point (TRP), base station, Spatial Relation Information (SRI), spatial relation, SRS Resource Indicator (SRI), Control Resource Set (CORESET), Physical Downlink Shared Channel (PDSCH), Codeword (CW), Transport Block (TB), Reference Signal (RS), antenna port (e.g., Demodulation Reference Signal (DMRS) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relation group, Code Division Multiplexing (CDM) group, reference signal group, CORESET group, Physical Uplink Control Channel (PUCCH) group, PUCCH resource group), resource (e.g., reference signal resource, SRS resource), resource set (e.g., reference signal resource set), CORESET pool, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, Quasi-Co-Location (QCL), QCL assumption, etc. may be read as interchangeable.

[0085] In this disclosure, the terms drop, abort, cancel, puncture, rate match, postpone, truncate, etc. may be read interchangeably.

[0086] In the present disclosure, small, narrow, and few may be read interchangeably.

[0087] In the present disclosure, resources, subcarriers, frequency resources, and REs may be read interchangeably.

[0088] (Wireless communication method) Certain higher layer parameters may be configured / signaled to the UE.

[0089] The specific higher layer parameters may be, for example, higher layer parameters related to the PUSCH / PUCCH of the sub-PRB.

[0090] Hereinafter, each embodiment of the present disclosure may be applied to a case where the higher layer parameter is set.

[0091] Furthermore, each embodiment of the present disclosure may be applied when the higher layer parameters are configured and the PUSCH / PUCCH of the sub-PRB is scheduled / triggered for the UE.

[0092] For example, when the higher layer parameters are configured for a UE and a PUSCH with a bandwidth smaller than 1 PRB is scheduled for the UE, the embodiments of the present disclosure may be applied.

[0093] For example, when the higher layer parameters are configured for a UE and a PUCCH resource with a bandwidth smaller than 1 PRB is triggered, the embodiments of the present disclosure may be applied.

[0094] Furthermore, each embodiment of the present disclosure may be applied when a coverage extension function is configured for a UE. The coverage extension function may be, for example, a function related to repeated transmission of multiple slots of a PUSCH / PUCCH.

[0095] The PUSCH in each embodiment of the present disclosure may be a configuration grant PUSCH or a repetition of the PUSCH.

[0096] The PUSCH in each embodiment of the present disclosure may be applied to a PUSCH other than a PUSCH scheduled by an UL grant of a Random Access Response (RAR). In this way, in a contention-based random access (CBRA) scenario, when the network receives a PUSCH scheduled by an UL grant of an RAR, the network cannot recognize which UE transmitted the PUSCH, and therefore, it is possible to avoid the complexity in such a scenario.

[0097] The PUSCH in each embodiment of the present disclosure may be applied to a PUSCH scheduled by an UL grant of a random access response (RAR). In this case, the UL grant may include a field that enables at least one of the functions of the following embodiments. The UE may transmit a random access preamble (Message A / Message 1) including a field indicating that it supports at least one of the functions / capabilities of the following embodiments.

[0098] The PUCCH in each embodiment of the present disclosure may be applied only to a PUCCH with a relatively long symbol (for example, PUCCH format 1 / 3 / 4, which may be referred to as a long PUCCH). This can further improve the coverage of the long PUCCH with a wide coverage.

[0099] The PUCCH in each embodiment of the present disclosure may be applied only to a PUCCH with a relatively short symbol (for example, PUCCH format 0 / 2, which may be referred to as a short PUCCH). In this way, in a specific frequency range (for example, FR2), when UL transmission is performed using a beam, the short PUCCH must be used, and the effect of improving the coverage of the PUCCH with a narrow coverage can be obtained.

[0100] The PUCCH in each embodiment of the present disclosure may be applied to only a PUCCH with a relatively small number of bits (for example, PUCCH format 0 / 1). This can improve the coverage of the PUCCH, which requires a UE located at a cell edge to transmit the minimum number of bits, for example.

[0101] The PUCCH in each embodiment of the present disclosure may be applied only to PUCCHs with a relatively large number of bits (for example, PUCCH formats 2 / 3 / 4), which can fill the coverage gap with PUCCH formats 0 / 1, which have a relatively wide coverage.

[0102] First Embodiment In the first embodiment, a method for determining a DMRS for a UL channel / signal of a sub-PRB will be described.

[0103] The UE may determine the DMRS for the UL channel / signal of the sub-PRB according to the existing (Rel.15 / 16) NR DMRS determination method.

[0104] In the present disclosure, determining a DMRS may mean determining a sequence / mapping of the DMRS.

[0105] For example, the UE may determine a DMRS for the PUSCH / PUCCH of a sub-PRB with a bandwidth of one PRB or more (eg, one PRB).

[0106] For example, in the case of PUSCH DMRS Type 1, the UE may determine that the frequency resource to which the DMRS is mapped is six subcarriers (or six resource elements) (sequence length is six). Also, in the case of PUSCH DMRS Type 2, the UE may determine that the frequency resource to which the DMRS is mapped is four subcarriers (or four resource elements).

[0107] Furthermore, for example, in the case of PUCCH DMRS, the UE may determine that the frequency resource to which the DMRS is mapped is 12 subcarriers.

[0108] Fig. 9 is a diagram showing an example of DMRS mapping according to the first embodiment. In Fig. 9, a PUSCH / PUCCH of a sub-PRB is scheduled / triggered for a UE. The PUSCH / PUCCH of the sub-PRB in Fig. 9 has a bandwidth of 0.5 PRB. At this time, the UE determines a DMRS that uses a bandwidth of 1 PRB as the DMRS for the PUSCH / PUCCH of the sub-PRB.

[0109] 9 illustrates an example of configuring a DMRS of DMRS type 1, but is not limited to this. Similarly, the DMRS types in the drawings shown in this disclosure are not limited to the DMRS types shown. Also, while FIG. 9 illustrates an example of configuring a DMRS of a total of two symbols, this is not limited to this. Similarly, the number of DMRS symbols in the drawings shown in this disclosure is not limited to the number of symbols shown.

[0110] When UL channels / signals of sub-PRBs are configured, UL channels / signals for multiple UEs may be mapped within one PRB. In other words, when UL channels / signals of sub-PRBs are configured, UL channels / signals for multiple UEs may be frequency division multiplexed (FDM) within one PRB. For example, as shown in FIG. 10, PUSCH / PUCCH and DMRS of PUSCH / PUCCH may be mapped to be FDM-multiplexed between UE#1 and UE#2.

[0111] Fig. 10 is a diagram showing an example of allocation of UL channels and DMRSs of sub-PRBs according to the first embodiment. In Fig. 10, PUSCH / PUCCHs of sub-PRBs are allocated to UE#1 and UE#2. By allocating (mapping) PUSCH / PUCCHs (and DMRSs of PUSCH / PUCCHs) to UE#1 and UE#2 so that they are frequency-orthogonal within the same PRB, it is possible to suppress interference between UEs.

[0112] In the present disclosure, one PRB of frequency resources allocated to each of UE#1 and UE#2 means one common PRB.

[0113] Variation 1 The UE may map an UL channel (eg, PUSCH / PUCCH) to REs on non-contiguous subcarriers.

[0114] For example, the UE may map the PUSCH / PUCCH to at least some of the REs of the subcarriers that are equal to the subcarriers to which the DMRS is mapped.

[0115] The UE may generate the PUSCH / PUCCH symbols by applying DFT spreading to the modulated data sequence and then performing subcarrier mapping.

[0116] 11 is a diagram showing an example of mapping of an UL channel and a DMRS according to Variation 1. The UE may map the PUSCH / PUCCH to REs of the same (all) subcarriers as the subcarriers of the DMRS.

[0117] 12 is a diagram showing another example of mapping of UL channels and DMRS according to Variation 1. The UE may map PUSCH / PUCCH to REs of some subcarriers that are the same as the subcarriers of the DMRS.

[0118] In variation 1, UL channels / signals for multiple UEs may be frequency division multiplexed (FDM) within one PRB.

[0119] Fig. 13 is a diagram showing an example of mapping of UL channels / signals and DMRS for multiple UEs according to Variation 1. In the example shown in Fig. 13, the PUSCH / PUCCH for each UE is mapped to the same subcarriers as the subcarriers of the DMRS for the PUSCH / PUCCH. In the example shown in Fig. 13, the PUSCH / PUCCH and the DMRS for the PUSCH / PUCCH are mapped so as to be FDM-multiplexed for UE#1 and UE#2.

[0120] According to variation 1, the REs of the DMRS and UL channel can be set close to each other, which improves the accuracy of channel estimation and also provides a frequency diversity effect.

[0121] According to the first embodiment, it is not necessary to define a new DMRS for the UL channel / signal of the sub-PRB, and it is possible to reduce implementation costs and suppress performance degradation due to a shortened sequence. Furthermore, since the PUSCH / PUCCH symbol (DFT-s-OFDM symbol) has a higher PAPR than the DMRS symbol, it is possible to obtain a coverage improvement effect compared to the allocation of one PRB according to the existing NR.

[0122] <Second embodiment> In the second embodiment, a method for determining a DMRS for a UL channel / signal of a sub-PRB will be described.

[0123] The UE may map the DMRS of the UL channel / signal of the sub-PRB to the same bandwidth as the UL channel / signal of the sub-PRB.

[0124] <<Embodiment 2-1>> The DMRS mapping pattern for the UL channels / signals of a sub-PRB and the DMRS mapping pattern for the UL channels / signals of one or more PRBs may be defined separately. In other words, the DMRS mapping pattern for the UL channels / signals of a sub-PRB may be different from the DMRS mapping pattern for the UL channels / signals of one or more PRBs.

[0125] A new DMRS type for the UL channel / signal of the sub-PRB may be defined. This DMRS type may be called, for example, DMRS type 3 (or DMRS configuration type 3) or DMRS type x (where x is any letter).

[0126] For example, when a UE is configured with a UL channel / signal of sub-PRBs represented by 1 / n*PRB (in other words, corresponding to a bandwidth of 1 / n*PRB), the UE may generate a DMRS with a sequence length based on n. For example, the sequence length may be 12 / n, where n may be an integer such that 12 mod n=0 (e.g., n=2, 3, 4, 6). x mod y may refer to the remainder of x divided by y.

[0127] In embodiment 2-1, the DMRS for the sub-PRB PUSCH may be allowed to be mapped to consecutive REs (subcarriers).

[0128] For example, a PUSCH / PUCCH with a bandwidth of 0.5 PRB (n=2 as described above) is scheduled / triggered for a UE. At this time, the UE generates a DMRS for PUSCH / PUCCH with a sequence length of 6 (12 / 2) and performs mapping (see FIG. 14).

[0129] In embodiment 2-1, for the DMRS of the PUSCH of a sub-PRB, a ratio between the energy per resource element (EPRE) of the PUSCH and the EPRE of the DMRS for the PUSCH may be specified / set. For example, when the bandwidth of the PUSCH of a sub-PRB is set to 1 / n*PRB (n is any positive number), a ratio between the EPRE of the PUSCH based on n and the EPRE of the DMRS for the PUSCH may be specified / set. For example, in embodiment 2-1, the UE may determine that the ratio of the PUSCH EPRE to the DMRS EPRE is a specific value (for example, 0 db) regardless of the number of DMRS CDM groups without data, or may determine that the ratio of the PUSCH EPRE to the DMRS EPRE is a specific value (for example, 0 db) when the number of DMRS CDM groups without data is 1, 2, or 3.

[0130] Also, the ratio between the EPRE of the PUSCH and the EPRE of the DMRS for PUSCH may be specified / set so that the power is constant for each symbol. For example, when the number of REs of the PUSCH per PRB in a certain symbol is equal to the number of DMRSs of the PUSCH per PRB in another symbol, the ratio between the EPRE of the PUSCH and the EPRE of the DMRS for PUSCH in each symbol may be equal. Also, for example, when the number of REs of the PUSCH per PRB in a certain symbol is N (e.g., N=2) times the number of DMRSs per PRB in another symbol, the EPRE of the PUSCH may be 1 / N times the EPRE of the DMRS for PUSCH.

[0131] Furthermore, the ratio between the EPRE of the PUSCH and the EPRE of the DMRS for the PUSCH may be specified / set so that the power is constant regardless of the value of n. For example, when n=2, the number of REs of the PUSCH per PRB in a certain symbol is half that when n=1, so the EPRE of the PUSCH when n=2 may be doubled compared to when n=1.

[0132] These measures make it possible to keep the transmission power constant for each symbol, thereby avoiding distortion of the transmission signal (deterioration of characteristics) that would otherwise occur due to abrupt changes in the transmission power for each symbol.

[0133] The ratio regarding the EPRE may be defined in advance in a specification, or may be configured / notified to the UE by higher layer signaling.

[0134] Fig. 15 is a diagram illustrating an example of mapping of UL channels / signals for multiple UEs according to embodiment 2-1. In the example illustrated in Fig. 15, in UE#1 and UE#2, PUSCH / PUCCH and DMRS of PUSCH / PUCCH are mapped so as to be FDM-multiplexed, respectively.

[0135] In addition, the UE may assume that the mapping of embodiment 2-1 cannot be applied to PUSCH / PUCCH allocation other than a specific bandwidth (e.g., 6 subcarrier width), or that it can only be applied to PUSCH / PUCCH transmission of a specific number of layers (e.g., 1-2 layers), or that it does not apply to PUSCH / PUCCH of multi-user MIMO.

[0136] In addition, in embodiment 2-1, the UE may determine the allocation of the DMRS based on the configured / instructed bandwidth for the PUSCH / PUCCH.

[0137] For example, in embodiment 2-1, when an UL channel / signal of less than one PRB is configured for the UE, the UE may map the DMRS to consecutive REs (subcarriers). Also, when an UL channel / signal of one PRB or more (e.g., two PRBs or more) is configured for the UE, the UE may (dynamically) determine to follow the method specified in Rel. 15 / 16 (to map the DMRS to non-consecutive REs (subcarriers)). This makes it possible to switch between the DMRS mapping specified in existing specifications and the mapping specified in embodiment 2-1 without requiring RRC reconfiguration.

[0138] <<Embodiment 2-2>> The DMRS mapping pattern of the UL channels / signals of a sub-PRB may be the same as the DMRS mapping pattern of the UL channels / signals of one or more PRBs.

[0139] [Embodiment 2-2-1] The UE may determine a DMRS specified in the existing (Rel.15 / 16) NR as the DMRS for the UL channel / signal of the sub-PRB, and may puncture / truncate the determined DMRS based on the bandwidth of the UL channel / signal.

[0140] 16 is a diagram illustrating an example of determining a DMRS according to embodiment 2-2-1. In FIG. 16, a PUSCH of a sub-PRB (0.5 PRB) is scheduled / triggered for a UE. The UE generates a DMRS (sequence length 6) for the PUSCH in accordance with existing specifications. Next, the UE punctures a portion of the generated DMRS that does not have the same bandwidth as the PUSCH.

[0141] [Embodiment 2-2-2] The UE may determine the DMRS specified in the existing (Rel. 15 / 16) NR as the DMRS of the UL channel / signal of the sub-PRB. In this case, the UE may determine the number of sequences based on the bandwidth of the UL channel / signal.

[0142] For example, when a UL channel / signal of sub-PRBs indicated by 1 / n*PRB is configured for the UE, the UE may generate a DMRS with a sequence length based on n.

[0143] For example, the sequence length may be 6 / n for PUSCH DMRS Type 1, where n may be an integer such that 6 mod n=0.

[0144] Furthermore, for example, the sequence length may be 4 / n in the case of PUSCH DMRS type 2, where n may be an integer such that 4 mod n=0.

[0145] Furthermore, for example, the sequence length may be 12 / n in the case of PUCCH DMRS, where n may be an integer such that 12 mod n=0.

[0146] Fig. 17 is a diagram showing an example of determining a DMRS according to embodiment 2-2-2. In Fig. 17, a PUSCH of a sub-PRB (0.5 PRB) is scheduled / triggered for a UE. The UE generates a DMRS for the PUSCH in accordance with existing specifications, using a sequence length determined according to the bandwidth of the sub-PRB PUSCH. Fig. 17 shows PUSCH DMRS Type 1, with a DMRS sequence length of 3.

[0147] Fig. 18 is a diagram illustrating an example of mapping of UL channels / signals for multiple UEs according to embodiment 2-2. In the example illustrated in Fig. 18, in UE#1 and UE#2, PUSCH / PUCCH and DMRS of PUSCH / PUCCH are mapped so as to be FDM-multiplexed, respectively.

[0148] <<Embodiment 2-3>> The following describes the mapping of DMRS ports.

[0149] The sequence / cyclic shift configuration of each DMRS port may be the same.

[0150] The UE may generate DMRS sequences for a particular CDM group and map (remap) them to consecutive REs.

[0151] The particular CDM group may be, for example, CDM group 0 as defined in Rel. 15 / 16.

[0152] 19 is a diagram illustrating an example of DMRS sequence generation according to embodiments 2-3. The UE generates a DMRS sequence for each DMRS port from a base sequence. The UE may map (remap) the DMRS sequence of the REs of the DMRS corresponding to a specific CDM group (e.g., CDM group 0) (in FIG. 19, REs with DMRS RE indexes = (0, 2, 4, 6, 8, 10)) to REs based on the UL channel / signal of the sub-PRB (REs with DMRS RE indexes = (0, 1, 2, 3, 4, 5) or REs with DMRS RE indexes = (6, 7, 8, 9, 10, 11)).

[0153] According to the second embodiment, it is possible to generate a DMRS appropriate for the UL channel of a sub-PRB.

[0154] <Third embodiment> In the third embodiment, a method for setting / instructing the bandwidth of a UL channel / signal of a sub-PRB will be described.

[0155] <<Embodiment 3-1>> [Embodiment 3-1-1] A UE may be assigned a certain number of PRBs according to the method specified in Rel. 15 / 16, and based on the assigned PRBs, the UE may determine which PRBs (less than one) to use for the UL channel / signal.

[0156] The UE may be configured with the allocation of UL channels / signals for the sub-PRBs, which may be done using higher layer signaling.

[0157] When the allocation of a sub-PRB UL channel / signal is configured and the number of PRBs allocated to the UL channel / signal is a specific number (e.g., 1), the UE may determine that the bandwidth allocated to the UL channel / signal is 1 / n*PRB (n is any positive number).

[0158] Information for determining the sub-PRB (e.g., information regarding the above n) may be specified in advance in a specification, may be notified / configured to the UE by higher layer signaling, or may be reported to the network in UE capability information.

[0159] Note that the number of PRBs allocated to a UL channel / signal is not limited to 1. When a sub-PRB UL channel / signal allocation is configured, the UE may determine that the bandwidth allocated to the UL channel / signal is 1 / n*PRB (n is any positive number).

[0160] [Embodiment 3-1-2] The UE may be instructed on the allocation of UL channels / signals for the sub-PRBs using specific higher layer parameters and / or specific fields included in the DCI.

[0161] The specific higher layer parameter may be a parameter related to Frequency Domain Resource Allocation (FDRA) of the PUSCH. The UE may be instructed on the bandwidth of the sub-PRB PUSCH based on the parameter related to FDRA of the PUSCH.

[0162] The specific field may be a field related to FDRA of the PUSCH (FDRA field). The UE may be instructed about the bandwidth of the sub-PRB PUSCH based on the FDRA field of the PUSCH.

[0163] The UE may be instructed that the bandwidth of the sub-PRB PUSCH is 1 / n*PRB (n is any positive number) based on the FDRA-related parameters / FDRA field of the PUSCH (see FIG. 20). Although FIG. 20 shows an example in which the value of n is indicated using the FDRA field, the value is not limited to this example. As shown in FIG. 20, the FDRA-related parameters / FDRA field and n may be associated with each other.

[0164] The UE may be instructed about the bandwidth of the sub-PRB PUSCH based on the FDRA-related parameters of the PUSCH. The instructed bandwidth may be indicated in a specific resource unit (e.g., the number of physical REs) or may be indicated by a sub-PRB index. The sub-PRB index will be described in detail in the following fourth embodiment.

[0165] Furthermore, the specific higher layer parameter may be a parameter related to a PUCCH resource (for example, "PUCCH-Resource"). The UE may be instructed on the bandwidth of the sub-PRB PUCCH based on the parameter related to the PUCCH resource.

[0166] Alternatively, the specific field may be a PUCCH Resource Indicator (PRI) field, and the UE may be instructed on the bandwidth of the sub-PRB PUCCH based on the PRI field.

[0167] The UE may be instructed based on the Parameter / PRI field for PUCCH resources that the bandwidth of the sub-PRB PUCCH is 1 / n*PRB (n is any positive number). The Parameter / PRI field for PUCCH resources may be associated with n.

[0168] The UE may be instructed on the bandwidth of the sub-PRB PUCCH based on the PUCCH resource parameter / PRI field. The instructed bandwidth may be indicated in specific resource units (e.g., the number of physical REs) or by sub-PRB index.

[0169] <<Embodiment 3-2>> A frequency resource (e.g., one or more PRBs) for mapping an UL channel / signal may be divided into multiple portions, and the multiple divided resources may be assigned indexes (hereinafter also referred to as resource indexes).

[0170] The division of the frequency resource may be predefined in the specifications, or the number of divisions may be configured / instructed to the UE using higher layer signaling / physical layer signaling. The bandwidth of the divided resources may be the same for each resource or may be different.

[0171] The UE may be configured with resource indices corresponding to the resources to which the UL channels / signals of the sub-PRBs are allocated using higher layer signaling.

[0172] In addition, the DCI may be used to configure the UE with a resource index corresponding to the resource to which the UL channel / signal of the sub-PRB is allocated.

[0173] For example, the UE may be instructed of the resource index of the sub-PRB PUSCH using a specific field included in the DCI (eg, DCI format 0_0 / 0_1 / 0_2) that schedules the PUSCH.

[0174] The specific field may be, for example, at least one of an FDRA field and a Time Domain Resource Allocation (TDRA) field.

[0175] Alternatively, the specific field may be a field (e.g., an antenna port field) associated with the indication of a DMRS port / CDM group. For example, the UE may be indicated a first index (e.g., 0) when a first DMRS port (e.g., DMRS port #0, #1) is indicated, and a second index (e.g., 1) when a second DMRS port (e.g., DMRS port #2, #3) is indicated.

[0176] Alternatively, the UE may be instructed of the resource index of the sub-PRB PUCCH using a specific field included in the DCI (for example, DCI format 1_0 / 1_1 / 1_2) that triggers the PUCCH.

[0177] The specific field may be, for example, a PUCCH resource indicator (PRI) field. The UE may receive information about the resource index in higher layer parameters related to the PUCCH resource, and may be instructed about the resource index using the PRI field included in the DCI.

[0178] 21 is a diagram illustrating an example of resource indication for an UL channel / signal according to embodiment 3-2. A resource index is indicated to a UE in an FDRA field included in DCI. For example, when the value of the FDRA field indicates "0000", the UE transmits a sub-PRB PUSCH in a frequency resource corresponding to resource index m=0.

[0179] In the present disclosure, frequency hopping (intra-slot / inter-slot frequency hopping) may be applied to the UL channel / signal of a sub-PRB. The frequency hopping for the UL channel / signal of a sub-PRB may be applied within the resource of the sub-PRB, or may be applied between multiple sub-PRBs each using multiple different frequency resources. Applying frequency hopping between multiple sub-PRBs each using multiple different frequency resources can achieve a frequency diversity effect.

[0180] Furthermore, when frequency hopping is applied, the UE may map UL channels / signals to non-contiguous resources (using combs), which can achieve frequency diversity while suppressing the increase in PAPR.

[0181] According to the third embodiment described above, it is possible to appropriately allocate UL channels / signals using frequency resources smaller than one PRB.

[0182] <Fourth embodiment> <<Embodiment 4-1>> The minimum allocated bandwidth used for allocating UL channels / signals may be specified in units smaller than a PRB.

[0183] In the present disclosure, the minimum allocated bandwidth, frequency mapping unit, mapping unit, frequency allocation unit, and allocation unit may be read interchangeably.

[0184] A unit smaller than a PRB, a sub-PRB unit, a specific number of RE units, or one RE unit may be read interchangeably.

[0185] The size of the sub-PRB (e.g., X in XPRB (X is a number greater than or equal to 0 and less than 1)) may be specified in advance, may be configured / notified to the UE using higher layer signaling, or may be reported to the network in the UE capability information.

[0186] A UE may be configured with (enabled) allocation of a UL channel / signal (e.g., PUSCH / PUCCH) on a sub-PRB basis using higher layer signaling, and then the UL channel / signal on a sub-PRB basis may be allocated / scheduled / triggered to the UE.

[0187] 22A and 22B are diagrams showing an example of UL channel mapping according to embodiment 4-1. Fig. 22A corresponds to an example of a UE for which sub-PRB-unit UL channel / signal validation is not configured, and the UL channel mapping unit for the UE is 1 PRB. On the other hand, Fig. 22B corresponds to an example of a UE for which sub-PRB-unit UL channel / signal validation is configured, and the UL channel mapping unit for the UE is sub-PRB (0.5 PRB).

[0188] The configuration shown in FIG. 22B allows allocation of 0.5*NPRB (N is any natural number) UL channels / signals (for example, allocation of 1.5 PRB UL channels / signals).

[0189] According to embodiment 4-1, flexible allocation of UL channels / signals is possible, which makes it possible to allocate resources more efficiently. Also, as described above, FDM for multiple UEs is possible within a specific bandwidth (e.g., 1 PRB).

[0190] <<Embodiment 4-2>> A correspondence relationship between the index of a sub-PRB (sub-PRB index) and the index of a PRB (PRB index) may be defined.

[0191] The UE may be assigned an UL channel / signal using the sub-PRB index.

[0192] Sub-PRB indices may be numbered consecutively across multiple PRB indices (see FIG. 23A). In the example of FIG. 23A, sub-PRB indices 0 and 1 correspond to PRB index 0, and sub-PRB indices 2 and 3 correspond to PRB index 1.

[0193] The number of sub-PRB indices corresponding to one PRB index is not limited to 2. The number of sub-PRB indices corresponding to one PRB index may be determined based on the bandwidth of the sub-PRB.

[0194] Using the correspondence relationship shown in Figure 23A makes it possible to allocate resources using sub-PRB indices. In the example of Figure 23A, the sub-PRB indices are defined to be consecutive across multiple PRBs, and there are no duplicate sub-PRB indices, so the UE can identify the sub-PRB to use by simply specifying the sub-PRB index.

[0195] Also, the sub-PRB indices may be numbered consecutively within one PRB index (see FIG. 23B). In the example of FIG. 23B, sub-PRB indices 0 and 1 correspond to PRB indices 0, 1, and 2, respectively.

[0196] The number of sub-PRB indices corresponding to one PRB index is not limited to 2. The number of sub-PRB indices corresponding to one PRB index may be determined based on the bandwidth of the sub-PRB.

[0197] By using the correspondence relationship shown in Figure 23B, resource allocation using both PRB indexes and sub-PRB indexes becomes possible. In the example of Figure 23B, the sub-PRB index is defined to indicate the position of a sub-PRB within one PRB, and the same sub-PRB index is used for multiple PRBs, so a UE can identify a sub-PRB to use by specifying the PRB index and sub-PRB index.

[0198] <Fifth embodiment> <Determining Cyclic Shift> The cyclic shift (CS) of the PUCCH will be explained below.

[0199] The number of CSs in the PUCCH in Rel.15 / 16 is 12. On the other hand, the number of CSs in the PUCCH of the sub-PRB may be M.

[0200] The M may be the number of REs (subcarriers) in the frequency direction in the sub-PRB, or may be a number equal to or less than the number of REs (subcarriers) in the frequency direction in the sub-PRB. The M may be specified in advance in a specification, may be configured / notified to the UE using higher layer signaling, or may be reported to the network as UE capability information.

[0201] The UE may be notified of one CS index required to generate a DMRS sequence for the PUCCH (each PUCCH format) using higher layer signaling / DCI.

[0202] For example, in the case of PF0, the UE may be notified of one CS index (initial CS index) and may derive one or more CS indexes based on the notified CS index. The UE may also derive a CS index for each ACK / NACK based on the initial CS index, as in existing specifications.

[0203] Figures 24A and 24B are diagrams showing an example of derivation of a CS index in Rel. 15. Figure 24A shows derivation of a CS index for a 1-bit HARQ-ACK in PF0 of 1 PRB or more, and Figure 24B shows derivation of a 2-bit HARQ-ACK in PF0 of 1 PRB or more.

[0204] In the example shown in FIG. 24A, the UE is notified that α0 is the initial CS index, and based on this, derives α6 as the CS index.

[0205] In the example shown in FIG. 24B, it is notified that α0 is the initial CS index, and based on this, α3, α6, and α9 are derived as CS indices.

[0206] 25A and 25B are diagrams illustrating an example of derivation of a CS index for a sub-PRB PUCCH. Fig. 25A illustrates derivation of a CS index for a 1-bit HARQ-ACK in PF0 of a sub-PRB, and Fig. 25B illustrates derivation of a CS index for a 2-bit HARQ-ACK in PF0 of a sub-PRB.

[0207] 25A and 25B, six CSs (α0 to α5) are used as CSs of the sub-PRB PUCCH. Note that in the present disclosure, the number of CSs is not limited to six.

[0208] In the example shown in FIG. 25A, it is notified that α0 is the initial CS index, and based on this, α3 is derived as the CS index.

[0209] In the example shown in FIG. 25B, it is notified that α0 is the initial CS index, and based on this, α1, α3, and α5 are derived as CS indices.

[0210] In the example shown in Figure 25B, the distance between the initial CS and the derived CS is not constant (uniform). Therefore, the distance between the CS corresponding to the information bits not including NACK and other CS may be configured to be larger than the distance between the CSs corresponding to the information bits including NACK.

[0211] Specifically, as shown in Figure 25B, the CS index corresponding to ACK / ACK (=HARQ-ACK value {1, 1}) is set to α3, and the CS indexes corresponding to the rest (i.e., information including at least one NACK) are set to α0, α1, and α5.

[0212] With this configuration, it is possible to reduce the probability that information including at least one NACK is erroneously detected as ACK / ACK, and improve the error rate characteristic for erroneously detecting a NACK as an ACK.

[0213] In the drawings of this disclosure, the position where the CS is determined is merely an example and is not limited to the example. Also, although the above example describes the case of PF0, it can be applied to any PF (for example, PF1 to PF4) as appropriate.

[0214] <<Multiplexing of HARQ-ACK and SR>> The following describes multiplexing of HARQ-ACK and SR.

[0215] The following description will be given taking PF0 as an example, but the PF is not limited to this.

[0216] In the case where 1-bit HARQ-ACK and 1-bit SR are multiplexed (mapped) to the PF, a total of four CS indices are required.

[0217] In the case where 2 bits of HARQ-ACK and 2 bits of SR are multiplexed (mapped) to PF, a total of eight CS indices are required.

[0218] However, when sub-PRBs are used, the number of CSs may be less than 8. If the number of CSs is less than 8, there is a risk that HARQ-ACK and SR multiplexing (mapping) may not be performed appropriately.

[0219] Hereinafter, a method for solving the above problem will be described, assuming that the number of CSs when operating sub-PRBs is M.

[0220] The UE may perform HARQ-ACK and SR multiplexing (mapping) according to at least one of the following methods 1 to 3.

[0221] [Method 1] When the UE multiplexes (maps) and transmits HARQ-ACK and SR using the PUCCH (PF) of the sub-PRB, the UE may transmit the PUCCH in multiple different frequency resources (PRBs) regardless of the value of M.

[0222] For example, the UE may transmit the HARQ-ACK and negative SR using PF0 in the designated resource, and may transmit the HARQ-ACK and positive SR using PF0 in a resource (PRB) different from the designated resource.

[0223] In the present disclosure, positive and negative may be interpreted interchangeably.

[0224] [Method 2] When the UE multiplexes (maps) and transmits HARQ-ACK and SR using the PUCCH (PF) of the sub-PRB, the UE may determine whether to transmit the PUCCH in different frequency resources (PRBs) based on the value of M.

[0225] For example, if the value of M is greater than or equal to a specific value (e.g., 8), the UE may transmit the HARQ-ACK and negative SR on the designated resource using PF0. In this case, the UE may transmit the HARQ-ACK and positive SR on the designated resource using a CS index different from the CS index of the HARQ-ACK and negative SR.

[0226] Also, for example, if the value of M is less than a specific value (e.g., 8), the UE may transmit the HARQ-ACK and negative SR using PF0 in the indicated resource. In this case, the UE may transmit the HARQ-ACK and positive SR using PF0 in a resource (PRB) different from the indicated resource.

[0227] [Method 3] When a UE multiplexes (maps) and transmits HARQ-ACK and SR using a PUCCH (PF) of a sub-PRB, the UE may determine whether to transmit PUCCH in different frequency resources (PRBs) based on the number of bits of a specific UCI (e.g., HARQ-ACK).

[0228] For example, if the number of bits for HARQ-ACK is a first value (eg, 1), the UE may transmit HARQ-ACK and SR using different CS indices and utilizing PF0.

[0229] For example, if the number of bits of the HARQ-ACK is a first value (e.g., 1), the UE may transmit the HARQ-ACK and negative SR on the designated resource using PF0. In this case, the UE may transmit the HARQ-ACK and positive SR on the designated resource using a CS index different from the CS index of the HARQ-ACK and negative SR.

[0230] For example, when the number of bits of the HARQ-ACK is a second value (eg, 2), the UE may transmit the HARQ-ACK and the SR using different frequency resources (PRBs) and PF0.

[0231] For example, when the number of bits of HARQ-ACK is a second value (e.g., 2), the UE may transmit the HARQ-ACK and negative SR in the designated resource using PF0. In this case, the UE may transmit the HARQ-ACK and positive SR in a resource (PRB) different from the designated resource using PF0.

[0232] In the above methods 1, 2, and 3, the information about different resources (PRBs) may be, for example, information indicating an offset value from the resources (PRBs) instructed by the network. The offset value may be predefined in a specification, or may be configured / instructed to the UE using higher layer signaling / DCI. The offset value may be a single value, or may be different for each combination of ACK / NACK when HARQ-ACK and negative SR are multiplexed.

[0233] In the above methods 2 / 3, the information about different CS indices may be, for example, information indicating an offset value from the CS index of HARQ-ACK and negative SR. The offset value may be predefined in a specification, or may be configured / indicated to the UE using higher layer signaling / DCI. The offset value may be a single value, or may be a different value for each combination of ACK / NACK when HARQ-ACK and negative SR are multiplexed.

[0234] According to the fifth embodiment described above, it is possible to appropriately determine the CS of the PUCCH and multiplex (map) the UCI.

[0235] Sixth Embodiment An upper layer parameter (RRC IE) / UE capability corresponding to a function (feature) in at least one of the above embodiments may be defined. The UE capability may indicate that the function is supported.

[0236] A UE configured with higher layer parameters corresponding to the function (enabling the function) may perform the function. It may also be specified that "a UE not configured with higher layer parameters corresponding to the function shall not perform the function (for example, in accordance with Rel. 15 / 16)."

[0237] A UE that reports a UE capability indicating that it supports the function may perform the function. It may also be specified that "a UE that does not report a UE capability indicating that it supports the function shall not perform the function (e.g., in accordance with Rel. 15 / 16)."

[0238] If the UE reports a UE capability indicating that it supports the function and the corresponding upper layer parameter is configured, the UE may perform the function. It may also be specified that "if the UE does not report a UE capability indicating that it supports the function or if the corresponding upper layer parameter is not configured, the UE shall not perform the function (e.g., in accordance with Rel. 15 / 16)."

[0239] The UE capability may indicate whether the UE supports this feature.

[0240] The function may be the transmission of an UL channel / signal using frequency resources smaller than one PRB (sub-PRB).

[0241] The UE capability may be defined as whether it supports transmission of the UL channel / signal of the sub-PRB.

[0242] The UE capability may be defined as whether or not it supports transmission of PUSCH / PUCCH in sub-PRBs.

[0243] The UE capability may be defined as a value that determines the bandwidth of a sub-PRB, which may be n where the bandwidth of a sub-PRB is denoted as 1 / n*PRB.

[0244] According to the sixth embodiment, the UE can achieve the above functions while maintaining compatibility with existing specifications.

[0245] (wireless communication system) The 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 thereof.

[0246] 26 is a diagram illustrating 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) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0247] The wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0248] 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.

[0249] The wireless communication system 1 may support dual connectivity between multiple base stations within 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))).

[0250] 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 located within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The locations and numbers of the cells and user terminals 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 base station 10.

[0251] 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).

[0252] 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 be a frequency band higher than FR2.

[0253] Furthermore, the user terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

[0254] The multiple base stations 10 may be connected by wire (for example, optical fiber conforming to the Common Public Radio Interface (CPRI), an X2 interface, or the like) or wirelessly (for example, 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.

[0255] 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, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0256] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0257] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the radio communication system 1. For example, 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), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0258] The radio access scheme may also be called a waveform. Note that 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.

[0259] 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 the downlink channel.

[0260] Furthermore, 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.

[0261] The PDSCH transmits user data, higher layer control information, System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit Master Information Block (MIB).

[0262] 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 for at least one of the PDSCH and the PUSCH.

[0263] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as an UL grant, a UL DCI, etc. Note that the PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

[0264] 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 more search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0265] 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," "CORESET setting," etc. in the present disclosure may be read interchangeably.

[0266] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0267] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

[0268] 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, 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 as DL-RS.

[0269] 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 DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as reference signals.

[0270] 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 also be called a user equipment-specific reference signal (UE-specific reference signal).

[0271] (base station) 27 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.

[0272] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0273] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured from 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.

[0274] 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 transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0275] 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.

[0276] The transmitting / receiving unit 120 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 1211 and an RF unit 122. The receiving unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0277] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0278] 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.

[0279] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0280] 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.

[0281] The transceiver 120 (transmission processor 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.

[0282] The transmitting / receiving unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna .

[0283] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna .

[0284] 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.

[0285] 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.

[0286] 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), control plane data, etc. for the user terminal 20.

[0287] 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.

[0288] The transceiver 120 may transmit configuration information for a PUSCH / PUCCH that is scheduled / triggered in a bandwidth narrower than one physical resource block (PRB). The controller 110 may determine a demodulation reference signal (DMRS) sequence for the PUSCH / PUCCH (first and second embodiments).

[0289] (user terminal) 28 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transmitting / receiving 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 transmitting / receiving antenna 230.

[0290] Note that this example mainly shows functional blocks of the characteristic parts of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0291] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from 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.

[0292] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 220.

[0293] The transceiver 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 transceiver unit 220 may be configured from 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.

[0294] 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.

[0295] The transmitting / receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0296] 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.

[0297] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0298] The transceiver 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.

[0299] The transceiver 220 (transmission processor 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 string to be transmitted, and output a baseband signal.

[0300] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and when transform precoding is not enabled, the transceiver unit 220 may not perform DFT processing as the transmission processing.

[0301] The transmitting / receiving unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna 230.

[0302] On the other hand, the transmitting / receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna 230.

[0303] 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 to acquire user data, etc.

[0304] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, 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.

[0305] The transmitting section and 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.

[0306] The transceiver 220 may receive configuration information for a PUSCH / PUCCH that is scheduled / triggered in a bandwidth narrower than one physical resource block (PRB). The controller 210 may determine a demodulation reference signal (DMRS) sequence for the PUSCH / PUCCH (first and second embodiments).

[0307] The control unit 210 may map the DMRS sequence across the bandwidth of one PRB that overlaps with the narrow bandwidth (second embodiment).

[0308] The transceiver 220 may receive the information about the narrow bandwidth based on at least one of a specific higher layer parameter and a specific field included in the downlink control information (third embodiment).

[0309] The control unit 210 may determine the PUSCH / PUCCH resource based on the correspondence between the PRB index and the index related to the bandwidth narrower than one PRB (fourth embodiment).

[0310] (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. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or multiple devices with software.

[0311] 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, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As mentioned above, the implementation method of each is not particularly limited.

[0312] For example, a base station, a user terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 29 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described 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.

[0313] In this disclosure, terms such as apparatus, circuit, device, section, unit, etc. may 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.

[0314] For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, serially, or in other ways. Furthermore, processor 1001 may be implemented by one or more chips.

[0315] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0316] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as 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.

[0317] The processor 1001 also reads 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 in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be realized in a similar manner.

[0318] 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 read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, a cache, a main memory, or the like. The memory 1002 may store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to an embodiment of the present disclosure.

[0319] 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 disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), 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 a secondary storage device.

[0320] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. 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.

[0321] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0322] Furthermore, 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.

[0323] 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), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using such hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0324] (Variation) Note that terms explained in the present disclosure and terms necessary for understanding the present 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 interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0325] 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.

[0326] Here, the numerology may be a communication parameter applied to at least one of 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), the 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.

[0327] A slot may be composed of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol), and may be a time unit based on numerology.

[0328] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist 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.

[0329] A radio frame, a subframe, a slot, a minislot, and a symbol all represent time units for transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may be referred to by other names corresponding to 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 interchangeable.

[0330] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in 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.

[0331] Here, TTI refers to, for example, the smallest 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. However, the definition of TTI is not limited to this.

[0332] 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) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0333] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0334] A TTI having a time length of 1 ms may be called a regular TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0335] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 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.

[0336] 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 numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0337] 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. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0338] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0339] 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.

[0340] 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 given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0341] The BWP may include an 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.

[0342] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0343] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. 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, etc. may be changed in various ways.

[0344] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0345] The names used for parameters and the like in this disclosure are not intended to be limiting in any way. Furthermore, the mathematical expressions 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 intended to be limiting in any way.

[0346] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, 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.

[0347] 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 multiple network nodes.

[0348] Input and output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0349] Notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, 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.

[0350] Note that 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. Furthermore, the RRC signaling may be called an RRC message, such as an RRC connection setup message or an RRC connection reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0351] 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).

[0352] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0353] 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.

[0354] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if 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), then these wired and / or wireless technologies are included within the definition of transmission media.

[0355] 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).

[0356] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "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," etc. may be used interchangeably.

[0357] 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. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0358] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0359] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0360] 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.

[0361] 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. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

[0362] The mobile body is a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of the mobile body include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon. The mobile body may also be a mobile body that moves autonomously based on an operation command.

[0363] The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Note that at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. 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.

[0364] Fig. 30 is a diagram showing an example of a vehicle according to an embodiment. As shown in Fig. 30, a vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0365] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.

[0366] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (e.g., an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0367] The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0368] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing various types of information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various types of information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0369] The driving assistance system unit 64 is configured with various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), Artificial Intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0370] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 to and from the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, which are provided in the vehicle 40.

[0371] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the above-mentioned base station 10, user terminal 20, etc. Furthermore, the communication module 60 may be, for example, the above-mentioned base station 10, user terminal 20, etc. (it may function as the base station 10, user terminal 20, etc.).

[0372] The communication module 60 may transmit signals from the various sensors 50-58 input to the electronic control unit 49 and information obtained based on these signals to an external device via wireless communication.

[0373] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on an information service unit 59 provided in the vehicle. The communication module 60 also stores the various information received from the external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40.

[0374] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments 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 multiple 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, "sidelink"). For example, terms such as uplink channel and downlink channel may be read as sidelink channel.

[0375] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0376] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal 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.

[0377] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed 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 specific order presented.

[0378] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or decimal number)), 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 that use 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other appropriate wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. It may also be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0379] 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."

[0380] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. 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 in some way precede the second element.

[0381] 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, etc.

[0382] Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0383] Also, "decision" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. In other words, "decision" may be considered to be "deciding" on some action.

[0384] Furthermore, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," or the like.

[0385] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0386] 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 elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0387] 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, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

[0388] 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."

[0389] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0390] In this disclosure, where articles are 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.

[0391] 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 in modified and altered forms without departing from the spirit and scope of the invention as defined by the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and explanatory and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. a receiving unit that receives configuration information for a physical uplink control channel (PUCCH) triggered in a bandwidth narrower than one physical resource block (PRB); a control unit that determines a sequence of a demodulation reference signal (DMRS) for the PUCCH, The control unit determines a resource for the PUCCH based on a correspondence relationship between a PRB index and a sub-PRB index related to a bandwidth narrower than one PRB; A terminal in which the sub-PRB indices are consecutively numbered in one of the PRB indexes.

2. The terminal of claim 1 , wherein the controller maps the DMRS sequence across a bandwidth of one PRB that overlaps with the narrow bandwidth.

3. The terminal according to claim 1 , wherein the receiver receives the information about the narrow bandwidth based on at least one of a specific higher layer parameter and a specific field included in downlink control information.

4. receiving configuration information for a physical uplink control channel (PUCCH) triggered at a bandwidth smaller than one physical resource block (PRB); determining a sequence of a demodulation reference signal (DMRS) for the PUCCH; determining a resource for the PUCCH based on a correspondence relationship between a PRB index and a sub-PRB index relating to a bandwidth narrower than one PRB; A wireless communication method for a terminal, in which the sub-PRB indexes are consecutively numbered in one of the PRB indexes.

5. a transmitter configured to transmit configuration information for a physical uplink control channel (PUCCH) triggered in a bandwidth narrower than one physical resource block (PRB); a control unit that determines a sequence of a demodulation reference signal (DMRS) for the PUCCH, The control unit determines a resource for the PUCCH based on a correspondence relationship between a PRB index and a sub-PRB index related to a bandwidth narrower than one PRB; A base station in which the sub-PRB indexes are consecutively numbered in one of the PRB indexes.

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