JP7775319B2 - Terminal, wireless communication method and base station - Google Patents

Description

This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems.

Long Term Evolution (LTE) was specified for Universal Mobile Telecommunications System (UMTS) networks with the aim of achieving even higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was specified with the aim of achieving even higher capacity and more advanced features than LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

Successor systems to LTE (also known as 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later, etc.) are also being considered.

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

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 frequency resources smaller than a specific frequency resource (e.g., one physical resource block (PRB)).

However, there has been insufficient consideration given to the method of setting/indicating resources and the method of determining reference signals (e.g., demodulation reference signals (DMRS))/UL signals for UL channels when transmitting UL channels/signals using frequency resources smaller than the specified frequency resources. If these considerations are insufficient, it may be impossible to improve coverage, and the increase in communication throughput may be inhibited.

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 UL channels/signals and determining reference signals/UL signals related to UL channels.

A terminal according to one aspect of the present disclosure includes a receiving unit that receives configuration information for a physical uplink shared channel (PUSCH) that is scheduled in a bandwidth narrower than one physical resource block (PRB), and a control unit that determines mapping of a demodulation reference signal (DMRS ) sequence for the PUSCH , wherein the control unit determines resources for the PUSCH 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 numbered consecutively within one PRB index .

According to one aspect of the present disclosure, it is possible to appropriately perform at least one of the following: setting/instructing UL channels/signals and determining reference signals/UL signals for UL channels.

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

(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 has been considered to transmit UL channels/signals using frequency resources (e.g., bandwidth) smaller than a specific frequency resource (e.g., one PRB).

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 PRBs).

Figure 1A shows an example of the transmission power of an UL channel/signal. In the example shown in Figure 1A, the maximum transmission 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 described below, the power density (PSD) can be increased.

Figure 1B shows another example of the transmission power of the UL channel/signal. In the example shown in Figure 1B, the maximum transmission 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 above, the power density will be lower.

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

As mentioned above, in Rel. 17 and later, support for transmissions using frequency resources (e.g., bandwidth) smaller than a specific frequency resource (e.g., 1 PRB) is being considered for the purpose of improving coverage of UL channels/signals (e.g., PUSCH/PUCCH).

For example, by making it possible to set the transmission bandwidth of PUSCH/PUCCH to be 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.

Figure 2A shows an example of PUSCH/PUCCH allocation. Figure 2A shows an example of allocating PUSCH/PUCCH to one PRB of an existing NR.

Figure 2B shows another example of PUSCH/PUCCH allocation. Figure 2B shows an example of allocating PUSCH/PUCCH to frequency resources smaller than one PRB.

In this disclosure, an UL channel/signal assigned 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.

In addition, 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 mentioned above expected, but frequency utilization efficiency is also improved.

For example, for the PUSCH of sub-PRBs, it becomes possible to allocate one PRB to multiple UEs, thereby improving frequency utilization efficiency.

Furthermore, with regard to PUCCH, in certain PUCCH formats in existing NR (e.g., PUCCH format 4), inter-UE multiplexing is performed using code division multiplexing (CDM (frequency domain (FD) OCC)). With FD OCC, in environments with strong frequency selectivity, complete orthogonality between UEs is not achieved, and there is a possibility of inter-UE interference. By utilizing the PUCCH of sub-PRBs, complete orthogonality can be achieved through frequency division multiplexing, which suppresses inter-UE interference and is expected to result in improved performance compared to existing PUCCH format 4.

(PUCCH format)
In NR, a configuration (format, also referred to as 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 PF0 to PF4, 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.

For example, PF0 and 1 are PFs used to transmit UCI of up to 2 bits. For example, the UCI may be at least one of delivery confirmation information (also called Hybrid Automatic Repeat reQuest-Acknowledgement (HARQ-ACK), acknowledgement (ACK), or negative-acknowledgement (NACK)) and a scheduling request (SR). PF0 can be assigned to one or two symbols, and is therefore also referred to as a short PUCCH or sequence-based short PUCCH. On the other hand, PF1 can be assigned to four to fourteen symbols, and is therefore also referred to as 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) using time domain block spreading using at least one of CS and time domain (TD)-orthogonal cover code (OCC). PF0 and PF1 may be mapped to one PRB.

PF2-4 are PFs used to transmit UCI of more than 2 bits (e.g., 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 referred to as short PUCCH, etc. On the other hand, PF3 and PF4 can be allocated to 4-14 symbols and are therefore also referred to as long PUCCH, etc. In PF4, multiple user terminals may be CDMed using block spreading in the frequency domain (FD)-OCC before DFT. PF2 and PF3 may be mapped to 1 to 16 PRBs. PF4 may be mapped to 1 PRB.

Note that for PF2 shown in Figure 3C, DMRS is mapped every three subcarriers. For simplicity, DMRS every three subcarriers is not shown in Figure 3C.

Intra-slot frequency hopping may be applied to PF1, PF3, and PF4. If the length of the PUCCH is N _symb , the length before frequency hopping (first hop) may be floor(N _symb /2), and the length after frequency hopping (second hop) may be ceil(N _symb /2).

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

The allocation of resources (e.g., PUCCH resources) used to transmit the uplink control channel is performed using higher layer signaling and/or downlink control information (DCI).

Specifically, one or more sets (PUCCH resource sets), each containing one or more PUCCH resources, are notified (configured) to the UE via higher layer signaling. For example, K (e.g., 1≦K≦4) PUCCH resource sets may be notified to the user terminal from the network (e.g., base station). Each PUCCH resource set may include M (e.g., 1≦M≦32) PUCCH resources.

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

The UE may determine the 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). For example, the implicit indication information may be the first CCE index of the PDCCH receiving the DCI.

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 in a slot (period allocated to PUCCH)
Index of the resource block (physical resource block (PRB)) where PUCCH allocation starts Number of PRBs allocated to PUCCH Whether frequency hopping is enabled for PUCCH Second hop frequency resource and initial cyclic shift (CS) index when frequency hopping is enabled Index of orthogonal spreading code (e.g., OCC: Orthogonal Cover Code) in the time domain, length of OCC used for block spreading before Discrete Fourier Transform (DFT) (also referred to as OCC length, spreading factor, etc.)
- OCC index used for block-wise spreading after DFT

PF0 or PF1 uses the series.

As shown in FIG. 4, for PF0, the UE uses a cyclic shift (phase rotation) based on an initial cyclic shift A and α _x corresponding to the value of UCI (at least one of HARQ-ACK and SR), and maps the resulting sequences obtained by applying the cyclic shift to each of 12 base sequences X ₀ , ..., X ₁₁ onto one PRB. The initial cyclic shift A may be configured using higher layer signaling. For example, as shown in FIG. 5A, the indexes x of the cyclic shift α _x corresponding to 1-bit HARQ-ACK information {0, 1} are 0 and 6, respectively. For example, as shown in FIG. 5B, the indexes x of the cyclic shift α x corresponding to 2-bit HARQ-ACK information {00, 01, 11, _{10} are 0, 3, 6, and 9, respectively. α x in} the equations of FIG. 4 may be the index x.

As shown in Figure 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.

In this disclosure, the series is mapped in the decreasing frequency direction, but the series may also be mapped in the increasing frequency direction.

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

At higher frequencies, it is preferable to reduce the PAPR.

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 degrades at high frequencies.

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

The DMRS type may also be referred to as the DMRS configuration type.

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

Multi-port DMRS is used for orthogonalizing MIMO layers, etc.

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

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.

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, the TD-OCC can only be applied to double-symbol DMRS.

The OCC in this disclosure may be interchangeably referred to as orthogonal code, orthogonalization, cyclic shift, FD OCC, TD OCC, etc.

Among DMRS, DMRS that are resource mapped in units of two consecutive (adjacent) symbols may be called double-symbol DMRS, and DMRS that are resource mapped in units of one symbol may be called single-symbol DMRS.

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 an additional position may be called an additional DMRS.

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

For 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}).

For 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.

For 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 a TD-OCC ({1,1} and {1,-1}) to two adjacent REs in the time direction.

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

One CDM group supports up to two ports of DMRS (up to two MIMO PUSCHs).

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

Figure 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.

In DMRS type 2, three CDM groups (CDM groups 0 to 2) are configured, and DMRS is 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.

Multiple types (Type 1 and Type 2) of low-PAPR sequences are supported for use in DMRS for PUSCH.

Low PAPR sequence generation type 1 may be a sequence in which Quadrature Phase Shift Keying (QPSK)-based CGS and Zadoff-Chu (ZC) sequences are used.

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.

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 of sequences 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.

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

The low-PAPR sequence for PUCCH is the same as the low-PAPR sequence for PUSCH described above.

NR's 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.

However, there has been insufficient consideration of how to set/indicate resources and how to determine reference signals for UL channels (e.g., demodulation reference signals (DMRS))/UL signals when transmitting UL channels/signals using frequency resources smaller than a specific frequency resource (e.g., 1 PRB).

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

If these considerations are not sufficient, it may not be possible to improve coverage, and the increase in communication throughput may be suppressed.

The inventors have therefore come up with a method for setting/indicating resources and a method for determining a reference signal (e.g., 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).

Embodiments of the present disclosure will be described in detail below with reference to the drawings. The wireless communication methods according to the embodiments may be applied independently or in combination.

In the following, the UL channels/signals (e.g., PUSCH/PUCCH) in this disclosure will be described assuming that they are UL channels/signals to which a waveform using a low-PAPR sequence is applied, but this is not limited to this. For example, a PUSCH to which a waveform using a low-PAPR sequence is applied may be a PUCCH to which DFT-s-OFDM is applied, but this is not limited to this. Also, for example, a PUCCH to which a waveform using a low-PAPR sequence is applied may be a PUCCH using PUCCH format 0/1/3/4, but this is not limited to this.

Furthermore, while the specific frequency resources described below in this disclosure are primarily frequency resources smaller than 1 PRB, the size and unit of the frequency resources are not limited to this.

Furthermore, while the following description of channels/signals in this disclosure will mainly focus on UL channels/signals, the channels/signals in this disclosure may also be downlink (DL) channels/signals. In other words, in this disclosure, uplink, uplink, and UL may be appropriately interpreted as downlink, downlink, and DL, respectively. When this disclosure is applied to DL, it is possible to improve the multiplexing capacity of multiple UEs/channels/signals.

Furthermore, although the following mainly describes PUSCH and PUCCH as UL channels/signals in this disclosure, the UL channels/signals in this disclosure may be any UL channel/signal (e.g., SRS/PRACH, etc.).

In this disclosure, "A/B" and "at least one of A and B" may be interpreted interchangeably. Also, in this disclosure, "A/B/C" may mean "at least one of A, B, and C."

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

In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, information elements (IEs), settings, etc. may be interchangeable. In this disclosure, Medium Access Control control elements (MAC Control Elements (CE)), update commands, activation/deactivation commands, etc. may be interchangeable.

In the present disclosure, higher layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

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.

In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), etc.

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.

In the present 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 (CONTROLLER RESOLUTION 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.

In this disclosure, terms such as drop, abort, cancel, puncture, rate match, postpone, and truncate may be used interchangeably.

In this disclosure, small, narrow, and few may be read interchangeably.

In this disclosure, resources, subcarriers, frequency resources, and REs may be read interchangeably.

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

The specific upper layer parameter may, for example, be an upper layer parameter related to the PUSCH/PUCCH of the sub-PRB.

Below, each embodiment of the present disclosure may be applied when the upper layer parameters are set.

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.

For example, each embodiment of the present disclosure may be applied when the relevant higher layer parameters are configured for a UE and a PUSH with a bandwidth smaller than 1 PRB is scheduled.

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

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

The PUSH in each embodiment of the present disclosure may be a configuration grant PUSH or a repeated transmission of the PUSH.

The PUSCH in each embodiment of the present disclosure may be applied to a PUSCH other than a PUSCH scheduled by an UL grant in a Random Access Response (RAR). In this way, in contention-based random access (CBRA), when the network receives a PUSCH scheduled by an UL grant in an RAR, the network cannot determine which UE transmitted the PUSCH, thereby avoiding the complexity that occurs in such situations.

The PUSCH in each embodiment of the present disclosure may be applied to a PUSCH scheduled by an UL grant in 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.

The PUCCH in each embodiment of the present disclosure may be applied only to PUCCHs with relatively long symbols (e.g., PUCCH formats 1/3/4, which may also be referred to as long PUCCHs). This can further improve coverage for long PUCCHs with wide coverage.

The PUCCH in each embodiment of the present disclosure may be applied only to a PUCCH with a relatively short symbol (e.g., PUCCH format 0/2, which may also be referred to as a short PUCCH). This makes it necessary to use a short PUCCH when operating UL transmission in a beam in a specific frequency range (e.g., FR2), thereby achieving the effect of improving the coverage of the PUCCH, which has a narrow coverage.

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

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

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

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.

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

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

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).

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.

Figure 9 is a diagram showing an example of DMRS mapping according to the first embodiment. In Figure 9, a PUSCH/PUCCH of a sub-PRB is scheduled/triggered for a UE. The PUSCH/PUCCH of the sub-PRB in Figure 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.

Note that Figure 9 illustrates an example of setting a DMRS of DMRS type 1, but this is not limited to this. Similarly, the DMRS types in each drawing shown in this disclosure are not limited to the DMRS types described. Also, Figure 9 illustrates an example of setting a DMRS of a total of two symbols, but this is not limited to this. Similarly, the number of DMRS symbols in each drawing shown in this disclosure is not limited to the number of symbols described.

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 Figure 10, the PUSCH/PUCCH and the DMRS of the PUSCH/PUCCH may be mapped so as to be FDM-multiplexed between UE #1 and UE #2.

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

Note that in this disclosure, one PRB of frequency resources allocated to each of UE #1 and UE #2 means one common PRB.

Variation 1
The UE may map UL channels (e.g., PUSCH/PUCCH) to REs on non-contiguous subcarriers.

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

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

Figure 11 shows an example of mapping of UL channels and DMRS according to Variation 1. The UE may map PUSCH/PUCCH to REs of the same (all) subcarriers as the subcarriers of the DMRS.

Figure 12 shows 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.

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

Figure 13 shows an example of mapping of UL channels/signals and DMRS for multiple UEs according to Variation 1. In the example shown in Figure 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 Figure 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.

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

According to the first embodiment, there is no need to define a new DMRS for the UL channel/signal of the sub-PRB, which reduces implementation costs and suppresses performance degradation due to shorter sequences. Furthermore, since the PUSCH/PUCCH symbol (DFT-s-OFDM symbol) has a higher PAPR than the DMRS symbol, coverage can be improved compared to the allocation of one PRB using the existing NR.

Second Embodiment
In the second embodiment, a method for determining DMRS for a UL channel/signal of a sub-PRB will be described.

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.

<<Embodiment 2-1>>
The mapping pattern of the DMRS of the UL channel/signal of the sub-PRB and the mapping pattern of the DMRS of the UL channel/signal of one or more PRBs may be defined separately. In other words, the mapping pattern of the DMRS of the UL channel/signal of the sub-PRB and the mapping pattern of the DMRS of the UL channel/signal of one or more PRBs may be different.

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 character).

For example, when a UE is configured with an 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 mean the remainder when x is divided by y.

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

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

In embodiment 2-1, for the DMRS of the PUSCH of a sub-PRB, the 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), the 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 PUSCH EPRE to DMRS EPRE is a specific value (e.g., 0 db) regardless of the number of DMRS CDM groups without data, or may determine that the ratio of PUSCH EPRE to DMRS EPRE is a specific value (e.g., 0 db) when the number of DMRS CDM groups without data is 1/2/3.

The ratio between the EPRE of the PUSCH and the EPRE of the DMRS for the PUSCH may also be specified/set so that the power is constant for each symbol. For example, if the number of PUSCH REs per PRB in a certain symbol is equal to the number of PUSCH DMRSs per PRB in another symbol, the ratio between the EPRE of the PUSCH and the EPRE of the DMRS for the PUSCH in each symbol may be equal. Also, for example, if the number of PUSCH REs 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 the PUSCH.

In addition, 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 PUSCH REs 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.

This allows the transmission power for each symbol to be constant, thereby avoiding distortion of the transmission signal (characteristic degradation) that would occur if the transmission power for each symbol were to suddenly change.

The ratio for the above EPRE may be specified in advance in the specifications or may be configured/notified to the UE via higher layer signaling.

Figure 15 is a diagram showing an example of UL channel/signal mapping for multiple UEs according to embodiment 2-1. In the example shown in Figure 15, the PUSCH/PUCCH and the DMRS of the PUSCH/PUCCH are mapped so as to be FDM-multiplexed for UE #1 and UE #2, respectively.

The UE may assume that the mapping of embodiment 2-1 cannot be applied to PUSCH/PUCCH allocations other than a specific bandwidth (e.g., 6 subcarrier width), or that it can only be applied to PUSCH/PUCCH transmissions of a specific number of layers (e.g., 1-2 layers), or that it is not applied to PUSCH/PUCCH in multi-user MIMO.

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

For example, in embodiment 2-1, if an UL channel/signal with less than one PRB is configured for the UE, the UE may map the DMRS to consecutive REs (subcarriers). Also, if an UL channel/signal with 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 (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.

<<Embodiment 2-2>>
The mapping pattern of the DMRS of the UL channel/signal of the sub-PRB may be the same as the mapping pattern of the DMRS of the UL channel/signal of one or more PRBs.

[Embodiment 2-2-1]
The UE may determine the 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.

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

[Embodiment 2-2-2]
The UE may determine the DMRS defined 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.

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

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.

Also, for example, the sequence length may be 4/n for PUSCH DMRS type 2, where n may be an integer such that 4 mod n = 0.

Also, for example, the sequence length may be 12/n for PUCCH DMRS, where n may be an integer such that 12 mod n = 0.

Figure 17 is a diagram showing an example of DMRS determination according to embodiment 2-2-2. In Figure 17, a sub-PRB (0.5 PRB) PUSCH is scheduled/triggered for the 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. Figure 17 shows PUSCH DMRS type 1, with a DMRS sequence length of 3.

Figure 18 is a diagram showing an example of UL channel/signal mapping for multiple UEs according to embodiment 2-2. In the example shown in Figure 18, the PUSCH/PUCCH and the DMRS of the PUSCH/PUCCH are mapped so as to be FDM-multiplexed for UE #1 and UE #2, respectively.

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

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

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

The particular CDM group in question may be, for example, the CDM group of CDM group 0 specified in Rel. 15/16.

Figure 19 is a diagram showing 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 DMRS REs (in Figure 19, REs with DMRS RE index = (0, 2, 4, 6, 8, 10)) corresponding to a specific CDM group (e.g., CDM group 0) to REs based on the UL channel/signal of the sub-PRB (REs with DMRS RE index = (0, 1, 2, 3, 4, 5) or REs with DMRS RE index = (6, 7, 8, 9, 10, 11)).

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

Third Embodiment
In the third embodiment, a method for setting/indicating the bandwidth of the UL channel/signal of a sub-PRB will be described.

<<Embodiment 3-1>>
[Embodiment 3-1-1]
A UE may be assigned a specific 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 UL channels/signals.

The UE may be configured with the allocation of UL channels/signals for the sub-PRBs. This configuration may be performed using higher layer signaling.

When a sub-PRB UL channel/signal allocation 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).

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

Note that the number of PRBs allocated to an 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).

[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.

The specific higher layer parameter may be a parameter related to the 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 the FDRA of the PUSCH.

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

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 Figure 20). Figure 20 shows an example in which the value of n is indicated using the FDRA field, but the value is not limited to this example. As shown in Figure 20, the FDRA related parameters/FDRA field and n may be associated.

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

The specific higher layer parameter may also be a parameter related to the PUCCH resource (e.g., "PUCCH-Resource"). The UE may be instructed on the bandwidth of the sub-PRB PUCCH based on the parameter related to the PUCCH resource.

The specific field may also be a PUCCH Resource Indicator (PRI) field. The UE may be instructed on the bandwidth of the sub-PRB PUCCH based on the PRI field.

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

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., number of physical REs) or by sub-PRB index.

<<Embodiment 3-2>>
A frequency resource (e.g., one or more PRBs) for mapping UL channels/signals may be divided into multiple portions, and the multiple divided resources may be assigned indices (hereinafter also referred to as resource indices).

The division of frequency resources 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.

The resource index corresponding to the resource to which the UL channel/signal of the sub-PRB is allocated may be configured for the UE using higher layer signaling.

In addition, a resource index corresponding to the resource to which the UL channel/signal of the sub-PRB is allocated may be configured for the UE using DCI.

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

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

The specific field may also be a field (e.g., an antenna port field) that is linked (related) to the indication of the DMRS port/CDM group. For example, the UE may be instructed with a first index (e.g., 0) when the first DMRS port (e.g., DMRS port #0, #1) is indicated, and with a second index (e.g., 1) when the second DMRS port (e.g., DMRS port #2, #3) is indicated.

The UE may also be instructed of the resource index of the sub-PRB PUCCH using a specific field included in the DCI (e.g., DCI format 1_0/1_1/1_2) that triggers the PUCCH.

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 to use the PRI field included in the DCI to indicate the resource index.

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

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

When frequency hopping is applied, the UE may map UL channels/signals to discontinuous resources (using Comb), thereby achieving frequency diversity while minimizing the increase in PAPR.

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

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

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

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

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 in the specifications, may be configured/notified to the UE using higher layer signaling, or may be reported to the network in the UE capability information.

The UE may be configured to allocate (enable) UL channels/signals (e.g., PUSCH/PUCCH) on a sub-PRB basis using higher layer signaling. After this configuration, the UE may be allocated/scheduled/triggered UL channels/signals on a sub-PRB basis.

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

By configuring as shown in Figure 22B, it becomes possible to allocate UL channels/signals of 0.5*N PRB (N is any natural number) (for example, it becomes possible to allocate UL channels/signals of 1.5 PRB).

According to embodiment 4-1, flexible allocation of UL channels/signals is possible, making resource allocation more efficient. Furthermore, as described above, FDM for multiple UEs is possible within a specific bandwidth (e.g., 1 PRB).

<<Embodiment 4-2>>
A correspondence relationship between sub-PRB indices (sub-PRB indices) and PRB indices (PRB indices) may be defined.

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

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

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

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 overlapping sub-PRB indices. Therefore, the UE can identify the sub-PRB to use by simply specifying the sub-PRB index.

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

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

Using the correspondence relationship shown in Figure 23B enables resource allocation using both PRB indexes and sub-PRB indexes. 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. Therefore, the UE can identify the sub-PRB to use by specifying the PRB index and sub-PRB index.

Fifth Embodiment
<Determining Cyclic Shift>
The following describes the cyclic shift (CS) of the PUCCH.

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

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

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.

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 indices based on the notified CS index. The UE may also derive the CS index for each ACK/NACK based on the initial CS index, as in existing specifications.

Figures 24A and 24B show an example of the derivation of the CS index in Rel. 15. Figure 24A shows the derivation of the CS index for a 1-bit HARQ-ACK in a PF0 of 1 PRB or more, and Figure 24B shows the derivation of the CS index for a 2-bit HARQ-ACK in a PF0 of 1 PRB or more.

In the example shown in FIG. 24A, the UE is notified that α ₀ is the initial CS index, and based on this, derives α ₆ as the CS index.

In the example shown in FIG. 24B, it is notified that α ₀ is the initial CS index, and based on this, α ₃ , α ₆ , and α ₉ are derived as CS indices.

Figures 25A and 25B show an example of derivation of the CS index for a sub-PRB PUCCH. Figure 25A shows the derivation of a CS index for a 1-bit HARQ-ACK in PF0 of a sub-PRB, and Figure 25B shows the derivation of a 2-bit HARQ-ACK CS index for PF0 of a sub-PRB.

25A and 25B, six CSs (α ₀ to α ₅ ) are used as CSs of the sub-PRB PUCCH. Note that in the present disclosure, the number of CSs is not limited to six.

In the example shown in FIG. 25A, it is notified that α ₀ is the initial CS index, and based on this, α ₃ is derived as the CS index.

In the example shown in FIG. 25B, it is notified that α ₀ is the initial CS index, and based on this, α ₁ , α ₃ , and α ₅ are derived as CS indices.

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 that do not contain a NACK and other CSs may be configured to be greater than the distance between the CSs corresponding to the information bits that contain a NACK.

Specifically, as shown in FIG. 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 .

By using this configuration, the probability that information containing at least one NACK is mistakenly detected as ACK/ACK can be reduced, and the error rate characteristics for mistakenly detecting a NACK as an ACK can be improved.

Note that in each drawing in this disclosure, the CS determination position is merely an example and is not limited to the example described. Also, while the above example describes the case of PF0, it can also be applied to any PF (e.g., PF1 to PF4) as appropriate.

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

The following explanation uses PF0 as an example, but PF is not limited to this.

In the case where 1 bit of HARQ-ACK and 1 bit of SR are multiplexed (mapped) to PF, a total of 4 CS indices are required.

In the case where 2 bits of HARQ-ACK and 2 bits of SR are multiplexed (mapped) to PF, a total of 8 CS indices are required.

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 properly.

Below, we will explain how to solve the above problem, assuming that the number of CSs when operating sub-PRBs is M.

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

[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.

For example, the UE may transmit HARQ-ACK and negative SR using PF0 in the specified resources. In this case, the UE may transmit HARQ-ACK and positive SR using PF0 in resources (PRBs) different from the specified resources.

In this disclosure, positive and negative may be interpreted interchangeably.

[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.

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 using PF0 in the indicated resources. In this case, the UE may transmit the HARQ-ACK and positive SR in the indicated resources using a CS index different from the CS index of the HARQ-ACK and negative SR.

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

[Method 3]
When the UE multiplexes (maps) and transmits HARQ-ACK and SR using the 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).

For example, if the number of bits for HARQ-ACK is a first value (e.g., 1), the UE may transmit HARQ-ACK and SR using PF0 with different CS indices.

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

For example, if the number of HARQ-ACK bits is a second value (e.g., 2), the UE may transmit HARQ-ACK and SR using different frequency resources (PRBs) and PF0.

For example, if the number of HARQ-ACK bits is a second value (e.g., 2), the UE may transmit the HARQ-ACK and negative SR using PF0 in the indicated resources. In this case, the UE may transmit the HARQ-ACK and positive SR using PF0 in resources (PRBs) different from the indicated resources.

In the above methods 1, 2, and 3, the information regarding 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 the specifications, or may be configured/instructed to the UE using higher layer signaling/DCI. The offset value may be a single value, or may be a different value for each ACK/NACK combination when multiplexing HARQ-ACK and negative SR.

In the above methods 2/3, the information regarding different CS indices may be, for example, information indicating the offset value from the CS index of HARQ-ACK and negative SR. The offset value may be predefined in the specifications, 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 ACK/NACK combination when HARQ-ACK and negative SR are multiplexed.

According to the above fifth embodiment, it becomes possible to appropriately determine the CS of the PUCCH and multiplex (map) the UCI.

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.

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

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)."

If the UE reports a UE capability indicating that it supports the function and the corresponding upper layer parameters are 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 parameters are not configured, the UE shall not perform the function (e.g., in accordance with Rel. 15/16)."

UE capabilities may indicate whether the UE supports this feature.

The function may be transmission of UL channels/signals using frequency resources smaller than one PRB (sub-PRB).

UE capability may be defined as whether or not it supports transmission of UL channels/signals on sub-PRBs.

UE capability may be defined as whether or not it supports transmission of PUSCH/PUCCH on sub-PRBs.

The UE capability may be defined as a value that determines the bandwidth of a sub-PRB. This value may be n, where the bandwidth of a sub-PRB is given by 1/n*PRB.

According to the sixth embodiment described above, the UE can realize the above functions while maintaining compatibility with existing specifications.

(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.

Figure 26 is a diagram showing an example of the schematic configuration of a wireless communication system according to one embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE) specified by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.

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.

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.

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

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

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).

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)). Macro cell C1 may be included in FR1, and small cell C2 may be included in FR2. For example, FR1 may be a frequency band below 6 GHz (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.

In addition, the user terminal 20 may communicate using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

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

A base station 10 may be connected to a core network 30 via another base station 10 or directly. 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), etc.

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

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

A radio access method may also be called a waveform. In wireless communication system 1, other radio access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) may be used for the UL and DL radio access methods.

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

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

User data, upper layer control information, System Information Block (SIB), etc. are transmitted via PDSCH. User data, upper layer control information, etc. may also be transmitted via PUSCH. Furthermore, Master Information Block (MIB) may also be transmitted via PBCH.

Lower layer control information may be transmitted via 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.

Note that the DCI that schedules the PDSCH may be called a DL assignment, DL DCI, etc., and the DCI that schedules the PUSCH may be called an UL grant, UL DCI, etc. Note that the PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

Detection of the PDCCH may utilize a control resource set (CORESET) and a search space. The CORESET corresponds to the resources to search for DCI. The search space corresponds to the search region and search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as 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.

The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be referred to as, 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.

Note that in this disclosure, downlink, uplink, etc. may be expressed without the word "link." Also, various channels may be expressed without the word "Physical" at the beginning.

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 the DL-RS.

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 an SS (PSS, SSS) and a PBCH (and a DMRS for the PBCH) may be referred to as an SS/PBCH block, an SS Block (SSB), etc. Note that SS, SSB, etc. may also be referred to as a reference signal.

In addition, 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). DMRS may also be called a user equipment-specific reference signal (UE-specific Reference Signal).

(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.

Note that this example mainly shows the functional blocks that characterize this embodiment, and the base station 10 may also have other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, etc., which are described based on common understanding in the technical field related to this disclosure.

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

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 composed of 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.

The transmitter/receiver unit 120 may be configured as an integrated transmitter/receiver unit, or may be composed of a transmitter unit and a receiver unit. The transmitter unit may be composed of a transmission processing unit 1211 and an RF unit 122. The receiver unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

The transmitting and receiving antenna 130 may be composed of an antenna described based on common understanding in the technical field to which this disclosure relates, such as an array antenna.

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.

The transceiver unit 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.

The transceiver unit 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.

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

The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.

The transceiver unit 120 (receiving processing unit 1212) may apply receiving 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.

The transceiver unit 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.

The transmission path interface 140 may send 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.

In addition, the transmitting unit and receiving unit of the base station 10 in the present disclosure may be composed of at least one of the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140.

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 control unit 110 may determine the sequence of a demodulation reference signal (DMRS) for the PUSCH/PUCCH (first and second embodiments).

(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 transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

Note that this example mainly shows the functional blocks of the characteristic parts of this 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 part described below may be omitted.

The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, etc., which are described based on common understanding in the technical field to which this disclosure relates.

The control unit 210 may control signal generation, mapping, etc. The control unit 210 may 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.

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 composed of 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.

The transmitter/receiver unit 220 may be configured as an integrated transmitter/receiver unit, or may be composed of a transmitter unit and a receiver unit. The transmitter unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiver unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

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

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

The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.

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

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

Whether or not to apply DFT processing may be based on the settings of transform precoding. If 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; if not, it may not be necessary to perform DFT processing as the transmission processing.

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

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

The transceiver unit 220 (receiving processing unit 2212) may apply receiving 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.

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

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

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

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

The transceiver unit 220 may receive information regarding the narrow bandwidth based on at least one of a specific upper layer parameter and a specific field included in the downlink control information (third embodiment).

The control unit 210 may determine the resources for the PUSCH/PUCCH based on the correspondence between the PRB index and an index relating to a bandwidth narrower than one PRB (fourth embodiment).

(Hardware configuration)
The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of hardware and/or 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 (e.g., wired, wireless, etc.) and these multiple devices. The functional block may also be realized by combining software with the single device or multiple devices.

Here, functions include, but are not limited to, judgment, determination, assessment, 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 functions may be called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 29 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

In this disclosure, terms such as apparatus, circuit, device, section, and unit may be used interchangeably. The hardware configuration of the base station 10 and user terminal 20 may be configured to include one or more of the devices shown in the figures, or may be configured to exclude some of the devices.

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, sequentially, or using other techniques. Furthermore, processor 1001 may be implemented by one or more chips.

Each function in the base station 10 and the user terminal 20 is realized, for example, by loading specified software (programs) onto hardware such as the processor 1001 and 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 storage 1003.

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 unit, an arithmetic unit, registers, etc. For example, at least a portion of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001.

The processor 1001 also reads programs (program code), 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 similar implementations may be used for other functional blocks.

Memory 1002 is a computer-readable recording medium and may be composed of, for example, at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EEPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. Memory 1002 may also be referred to as a register, cache, main memory, etc. Memory 1002 may store executable programs (program code), software modules, etc. for implementing a wireless communication method according to one embodiment of the present disclosure.

Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray 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 an auxiliary storage device.

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

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

Furthermore, each device such as the processor 1001 and 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.

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.

(Modification)
Note that terms described 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.

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.

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

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

A slot may include multiple minislots. Each minislot may consist of one or more 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.

Radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals. Radio frame, subframe, slot, minislot, and symbol may be referred to by other names that correspond to them. Note that the time units such as frame, subframe, slot, minislot, and symbol used in this disclosure may be interpreted interchangeably.

For example, one subframe may be referred to as a TTI, multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. In other words, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing a TTI may be called a slot, minislot, etc. instead of a subframe.

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

A TTI may be a transmission time unit for a channel-coded data packet (transport block), code block, code word, etc., or may be a processing unit for scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, code block, code word, etc. is actually mapped may be shorter than the TTI.

Note that when one slot or one minislot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the smallest time unit for scheduling. Furthermore, the number of slots (minislots) that constitute the smallest time unit for scheduling may be controlled.

A TTI with a time length of 1 ms may be referred to as 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 referred to as a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, minislot, subslot, slot, etc.

Note that 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 that of a long TTI and greater than or equal to 1 ms.

A resource block (RB) is a resource allocation unit in the time domain and 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.

In addition, an RB may include one or more symbols in the time domain and may be one slot, one minislot, one subframe, or one TTI in length. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

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

A resource block may also 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.

A Bandwidth Part (BWP) (which may also be referred to as a partial 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 BWP and numbered within that BWP.

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

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."

Note that the structures of the radio frames, subframes, slots, minislots, and symbols described above 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, as well as the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in various ways.

Furthermore, the information, parameters, etc. described in this disclosure may be expressed using absolute values, relative values from a predetermined value, or other corresponding information. For example, radio resources may be indicated by a predetermined index.

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

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.

In addition, 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.

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

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

Note that physical layer signaling may also be referred to as Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), etc. Furthermore, RRC signaling may also be referred to as RRC messages, such as RRC Connection Setup messages and RRC Connection Reconfiguration messages. Furthermore, MAC signaling may also be notified using, for example, MAC Control Elements (CEs).

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

The determination may be made by a value represented by a single bit (0 or 1), by a Boolean value represented by true or false, or by a numerical comparison (e.g., comparison with a predetermined value).

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.

Software, instructions, information, etc. may also be transmitted and received via 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), these wired and/or wireless technologies are included within the definition of transmission media.

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

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

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," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

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

In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

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.

At least one of the base station and the mobile station may be referred to as 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.

The term "mobile body" refers to a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of such mobile bodies include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects carried by these. Furthermore, the mobile body may be a mobile body that moves autonomously based on operational commands.

The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, a self-driving car, 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.

Figure 30 is a diagram showing an example of a vehicle according to one embodiment. As shown in Figure 30, the 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, an axle 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.

The drive unit 41 is composed of, for example, at least one of an engine, a motor, or a hybrid of an engine and a motor. 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.

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).

Signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the motor current, a rotation speed signal for the front wheels 46/rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal for 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 for the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal for the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal for 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.

The information service unit 59 is composed of various devices, such as a car navigation system, audio system, speakers, displays, televisions, and radios, that provide various information such as driving information, traffic information, and entertainment information, as well as one or more ECUs that control these devices. The information service unit 59 uses information obtained from external devices via the communication module 60, etc., to provide various information/services (e.g., multimedia information/multimedia services) to the occupants of the vehicle 40.

The driving assistance system unit 64 is composed of various devices that provide functions to prevent accidents and reduce 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 Unit (IMU) and Inertial Navigation System (INS)), 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 or autonomous driving functions.

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 between 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 various sensors 50-58, all of which are provided on the vehicle 40.

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 external devices. For example, it transmits and receives various information to and from external devices 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 base station 10, user terminal 20, etc. described above. The communication module 60 may also be, for example, the base station 10, user terminal 20, etc. described above (it may function as the base station 10, user terminal 20, etc.).

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

The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on the information service unit 59 provided in the vehicle. The communication module 60 also stores the various information received from external devices in memory 62 that can be used by the microprocessor 61. Based on the information stored in 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 other components provided in the vehicle 40.

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

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

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

Each aspect/embodiment described in this disclosure may be used alone, in combination, or switched between depending on the implementation. Furthermore, the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in this disclosure may be rearranged unless inconsistent. For example, the methods described in this disclosure present elements of various steps in an exemplary order, and are not limited to the particular order presented.

The aspects/embodiments described in this disclosure may be implemented using standards such as 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 802.17 (WiMAX (registered trademark)), IEEE 802.18 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 80 The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. Furthermore, the present invention may be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

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."

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.

As used in this disclosure, the term "determining" 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.

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

"Judgment" may also be considered to be "deciding" on resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment" may also be considered to be "deciding" on some action.

In addition, "judgment (decision)" can also be interpreted as "assuming," "expecting," "considering," etc.

The term "maximum transmit power" used in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

As used in this disclosure, the terms "connected," "coupled," or any variation thereof, mean 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."

For the purposes of 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.

In this 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 "combined" may also be interpreted in the same way as "different."

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

In this disclosure, where articles are added by translation, such as a, an, and the in English, this disclosure may include the noun following these articles being plural.

The invention according to the present disclosure has been described in detail above, but it will be clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described herein. 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 claims. Therefore, the description of the present disclosure is intended to be illustrative and explanatory and does not pose any limiting meaning to the invention according to the present disclosure.

Claims (5)

a receiving unit that receives configuration information for a physical uplink shared channel (PUSCH) that is scheduled in a bandwidth narrower than one physical resource block (PRB);
a control unit that determines mapping of a demodulation reference signal (DMRS ) sequence for the PUSCH ,
The control unit determines a resource for the PUSCH 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 . The terminal according to claim 1, wherein the control unit maps the DMRS sequence across a bandwidth of one PRB that overlaps with the narrow bandwidth. The terminal according to claim 1, wherein the receiver receives information regarding the narrow bandwidth based on at least one of a specific upper layer parameter and a specific field included in downlink control information. receiving configuration information for a physical uplink shared channel (PUSCH) scheduled in a bandwidth narrower than one physical resource block (PRB);
determining a mapping of a demodulation reference signal (DMRS ) sequence for the PUSCH;
determining a resource for the PUSCH 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 . a transmitter that transmits configuration information for a physical uplink shared channel (PUSCH) that is scheduled in a bandwidth narrower than one physical resource block (PRB);
a control unit that determines mapping of a demodulation reference signal (DMRS ) sequence for the PUSCH ,
The control unit determines a resource for the PUSCH 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 .