Method and apparatus for transmitting and receiving a signal in a wireless communication system

Abstract

A method and apparatus for transmitting and receiving a signal in a wireless communication system according to one embodiment of the present application, the method includes receiving a downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH), and transmitting the PUSCH based on the DCI. The PUSCH is transmitted in a specific number of resource blocks (RBs), and the specific number of RBs can be (i) at most the number of RBs allocated through the DCI and (ii) a maximum number that is a multiple of 2, 3, and / or 5.

Description

Technical Field

[0001] The present disclosure relates to a method and apparatus for use in a wireless communication system. Background Art

[0002] In general, wireless communication systems are developing to cover a wide range of areas in various ways to provide communication services such as audio communication services, data communication services, etc. Wireless communication is a multiple-access system that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power, etc.). For example, a multiple-access system may include one of a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, a single-carrier frequency division multiple access (SC-FDMA) system, and the like. Summary of the Invention

[0003] Technical issues

[0004] An object of the present disclosure is to provide a method and apparatus for efficiently transmitting an uplink channel in a wireless communication system.

[0005] Those skilled in the art will understand that the objectives achievable by the present disclosure are not limited to those specifically described above, and the above and other objectives achievable by the present disclosure will be more clearly understood from the following detailed description.

[0006] Technical Solution

[0007] The present disclosure provides a method and apparatus for transmitting and receiving signals in a wireless communication system.

[0008] According to one aspect of the present disclosure, a method for transmitting and receiving signals by a user equipment (UE) in a wireless communication system includes the following steps: receiving downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH); and transmitting the PUSCH based on the DCI. The PUSCH is transmitted in a specific number of resource blocks (RBs), and the specific number is (i) equal to or less than the number of RBs allocated by the DCI and (ii) a maximum number that is a multiple of 2, 3, and / or 5.

[0009] According to another aspect of the present disclosure, a UE for transmitting and receiving signals in a wireless communication system includes: at least one transceiver; at least one processor; and at least one memory operatively coupled to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform specific operations. The specific operations include: receiving a DCI for scheduling a PUSCH; and transmitting a PUSCH based on the DCI. The PUSCH is transmitted in a specific number of RBs, where the specific number is (i) equal to or less than the number of RBs allocated by the DCI and (ii) a maximum number that is a multiple of 2, 3, and / or 5.

[0010] According to another aspect of the present disclosure, a device for a user equipment (UE) includes at least one processor and at least one computer memory operatively coupled to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations. The operations include receiving a DCI for scheduling a PUSCH; and transmitting the PUSCH based on the DCI. The PUSCH is transmitted in a specific number of RBs, where the specific number is (i) equal to or less than the number of RBs allocated by the DCI and (ii) a maximum number that is a multiple of 2, 3, and / or 5.

[0011] According to another aspect of the present disclosure, a computer-readable storage medium including at least one computer program for causing at least one processor to perform operations is provided. The operations include: receiving a DCI for scheduling a PUSCH; and transmitting a PUSCH based on the DCI. The PUSCH is transmitted in a specific number of RBs, where the specific number is (i) equal to or less than the number of RBs allocated by the DCI and (ii) a maximum number that is a multiple of 2, 3, and / or 5.

[0012] In these methods and apparatuses, the specific number of RBs may be RBs having relatively low indexes among RBs allocated through DCI.

[0013] In these methods and apparatuses, a certain number of RBs may form one or more interlaces.

[0014] In these methods and devices, based on receiving DCI in a common search space (CSS), a PUSCH may be transmitted in (i) an RB set with a lowest index among an uplink RB set that overlaps in the frequency domain with a control channel element (CCE) with a lowest index in which the DCI is detected, and (ii) an RB set with a lowest index in an uplink bandwidth part (BWP) in the absence of a UL RB set that overlaps with the CCE.

[0015] In the methods and apparatuses, the PUSCH can be transmitted in a RB set having a lowest index among RB sets or BWP in which the DCI is received, based on the DCI being received in the CSS.

[0016] In the methods and apparatuses, the DCI can be a DCI format 0_0 for a fallback operation.

[0017] The communication device can include at least an autonomous driving vehicle that communicates with the UE, the network, and another autonomous driving vehicle other than the communication device.

[0018] The above-described aspects of the disclosure are only some of the preferred embodiments of the disclosure, and various embodiments reflecting the technical features of the disclosure can be derived and understood by those skilled in the art from the following detailed description of the disclosure.

[0019] Advantages

[0020] According to embodiments of the disclosure, the communication device can more efficiently transmit an uplink channel in a different manner from the prior art.

[0021] Those skilled in the art will understand that the effects achievable with the disclosure are not limited to those specifically described above, and other advantages of the disclosure will be more clearly understood from the following detailed description in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A radio frame structure is illustrated.

[0023] Figure 2 A resource grid during the duration of a slot is illustrated.

[0024] Figure 3 A self-contained slot structure is illustrated.

[0025] Figure 4 An acknowledgement / negative-acknowledgement (ACK / NACK) transmission process is illustrated.

[0026] Figure 5 A wireless communication system supporting an unlicensed band is illustrated.

[0027] Figure 6 An exemplary method of occupying resources in an unlicensed band is illustrated.

[0028] Figure 7 And Figure 8 is a flowchart illustrating a channel access procedure (CAP) for signal transmission in an unlicensed band.

[0029] Figure 9 A resource block (RB) interleaving is illustrated.

[0030] Figures 10 to 30is a diagram illustrating uplink (UL) channel transmission according to an embodiment of the present disclosure.

[0031] Figures 31 to 34 An apparatus according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0032] The following technologies may be used in various wireless access systems such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), and single-carrier frequency division multiple access (SC-FDMA). CDMA may be implemented as a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA may be implemented as a radio technology such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented as a radio technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wireless Fidelity (WiFi)), IEEE 802.16 (Worldwide Interoperability for Microwave Access (WiMAX)), IEEE 802.20, Evolved UTRA (E-UTRA), etc. UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS (E-UMTS) using E-UTRA, and LTE-Advanced (LTE-A) is an evolution of 3GPP LTE. 3GPP New Radio or New Radio Access Technology (NR) is an evolved version of 3GPP LTE / LTE-A.

[0033] For clarity of description, the present disclosure will be described in the context of 3GPP communication systems (e.g., LTE and NR), which should not be construed as limiting the spirit of the present disclosure. LTE refers to technology that goes beyond 3GPP TS 36.xxx version 8. Specifically, LTE technology that goes beyond 3GPP TS 36.xxx version 10 is called LTE-A, and LTE technology that goes beyond 3GPP TS 36.xxx version 13 is called LTE-A pro. 3GPP NR is a technology that goes beyond 3GPP TS 38.xxx version 15. LTE / NR may be referred to as a 3GPP system. "xxx" designates a technical specification number. LTE / NR may be collectively referred to as a 3GPP system. Background technology, terms, abbreviations, etc. as used herein refer to technical specifications published prior to this disclosure. For example, reference may be made to the following documents.

[0034] 3GPP NR

[0035] -38.211: Physical channels and modulation

[0036] - 38.212: Multiplexing and channel coding

[0037] - 38.213: Physical layer procedures for control

[0038] - 38.214: Physical layer procedures for data

[0039] - 38.300: NR and NG-RAN overall description

[0040] - 38.331: Radio Resource Control (RRC) protocol specification

[0041] Figure 1 A radio frame structure for NR is shown.

[0042] In NR, UL transmission and DL transmission are configured per frame. Each radio frame has a length of 10 ms and is divided into two 5 ms half frames. Each half frame is divided into five 1 ms subframes. A subframe is divided into one or more slots, and the number of slots in a subframe depends on the subcarrier spacing (SCS). According to a cyclic prefix (CP), each slot includes 12 or 14 OFDM(A) symbols. When a normal CP is used, each slot includes 14 OFDM symbols. When an extended CP is used, each slot includes 12 OFDM symbols. A symbol can include an OFDM symbol (or CP-OFDM symbol) and an SC-FDMA symbol (or discrete Fourier transform-spread-OFDM (DFT-s-OFDM) symbol).

[0043] Table 1 exemplarily shows that the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to the SCS in the case of a normal CP.

[0044] [Table 1]

[0045] SCS(15*2∧u) <![CDATA[N slot symb ]]> N frame，u slot ]] N subframe，u slot ]]> 15KHz (u=0) 14 10 1 30KHz (u=1) 14 20 2 60KHz (u=2) 14 40 4 120KHz (u=3) 14 80 8 240KHz (u=4) 14 160 16

[0046] *N slot symb : Number of symbols in a slot

[0047] *N frame,u slot : Number of slots in a frame

[0048] *N subframe,u slot : Number of slots in a subframe

[0049] Table 2 shows that the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to the SCS in the case of an extended CP.

[0050] [Table 2]

[0051] SCS(15*2∧u) <![CDATA[N slot symb ]]> <![CDATA[N frame，u slot ]]> <![CDATA[N subfrane，u slot ]]> 60KHz (u=2) 12 40 4

[0052] In the NR system, different OFDM(A) parameter sets (e.g., SCS, CP length, etc.) may be configured for multiple cells aggregated for one UE. Therefore, the (absolute time) duration of a time resource (e.g., a subframe, a time slot, or a transmission time interval (TTI)) consisting of the same number of symbols (for convenience, referred to as a time unit (TU)) may be configured differently between the aggregated cells.

[0053] In NR, various numerology sets (or SCSs) can be supported to support various 5th generation (5G) services. For example, a 15 kHz SCS can support wide areas in traditional cellular bands, while a 30 kHz or 60 kHz SCS can support dense urban areas, lower latency, and wide carrier bandwidths. An SCS of 60 kHz or higher can support bandwidths greater than 24.25 kHz to overcome phase noise.

[0054] The NR frequency band can be defined by two types of frequency ranges, FR1 and FR2. FR1 and FR2 can be configured as described in Table 3 below. FR2 can be millimeter wave (mmW).

[0055] [Table 3]

[0056] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 450MHz-7125MHz 15, 30, 60kHz FR2 24250MHz-52600MHz 60, 120, 240kHz

[0057] Figure 2 The resource grid during the duration of one time slot is shown.

[0058] A slot includes multiple symbols in the time domain. For example, a slot includes 14 symbols in the normal CP case and 12 symbols in the extended CP case. A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) can be defined by multiple (e.g., 12) consecutive subcarriers in the frequency domain. A bandwidth part (BWP) can be defined by multiple consecutive (physical) RBs ((P)RBs) in the frequency domain and corresponds to a parameter set (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., 5) BWPs. Data communication can be carried out in an active BWP, and only one BWP can be enabled for a UE. Each element in the resource grid can be called a resource element (RE), to which a complex symbol can be mapped.

[0059] In a wireless communication system, a UE receives information from a base station (BS) in the downlink (DL) and transmits information to the BS in the uplink (UL). The information exchanged between the BS and the UE includes data and various control information, and various physical channels / signals exist depending on the type / purpose of the information exchanged therebetween. A physical channel corresponds to a set of resource elements (REs) that carry information from higher layers. A physical signal corresponds to a set of REs that are used by the physical layer but do not carry information from higher layers. Higher layers include the medium access control (MAC) layer, the radio link control (RLC) layer, the packet data convergence protocol (PDCP) layer, the radio resource control (RRC) layer, and the like.

[0060] DL physical channels include the physical broadcast channel (PBCH), the physical downlink shared channel (PDSCH), and the physical downlink control channel (PDCCH). DL physical signals include the DL reference signal (RS), the primary synchronization signal (PSS), and the secondary synchronization signal (SSS). DL RS includes the demodulation reference signal (DM-RS), the phase tracking reference signal (PT-RS), and the channel state information reference signal (CSI-RS). UL physical channels include the physical random access channel (PRACH), the physical uplink shared channel (PUSCH), and the physical uplink control channel (PUCCH). UL physical signals include the UL RS. UL RS includes the DM-RS, PT-RS, and the sounding reference signal (SRS).

[0061] Figure 3 Shows the structure of a self-contained time slot.

[0062] In the NR system, the frame has a self-contained structure in which DL control channels, DL or UL data, UL control channels, etc. can all be included in one time slot. For example, the first N symbols in the time slot (hereinafter referred to as the DL control region) can be used to send DL control channels, and the last M symbols in the time slot (hereinafter referred to as the UL control region) can be used to send UL control channels. N and M are integers greater than or equal to 0. The resource region (hereinafter referred to as the data region) between the DL control region and the UL control region can be used for DL ​​data transmission or UL data transmission. For example, the following configuration can be considered. List the various parts in chronological order.

[0063] In the present disclosure, a base station (BS) may be, for example, a gNode B (gNB).

[0064] UL physical channel / signal

[0065] (1) PUSCH

[0066] The PUSCH may carry UL data (e.g., uplink shared channel (UL-SCH) transport blocks (TBs)) and / or uplink control information (UCI). The PUSCH may be transmitted based on a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform or a discrete Fourier transform spread OFDM (DFT-s-OFDM) waveform. When the PUSCH is transmitted based on a DFT-s-OFDM waveform, the UE may transmit the PUSCH by applying transform precoding. For example, when transform precoding is not allowed (e.g., when transform precoding is disabled), the UE may transmit the PUSCH based on a CP-OFDM waveform. When transform precoding is allowed (e.g., when transform precoding is enabled), the UE may transmit the PUSCH based on a CP-OFDM waveform or a DFT-s-OFDM waveform. PUSCH transmissions may be dynamically scheduled by PDCCH (dynamic scheduling) or semi-statically scheduled by higher layer signaling (e.g., RRC signaling) (and / or Layer 1 (L1) signaling (e.g., PDCCH)) (configured scheduling (CS)). Therefore, in dynamic scheduling, PUSCH transmissions may be associated with PDCCH, while in CS, PUSCH transmissions may not be associated with PDCCH. CS may include PUSCH transmissions based on type 1 configuration grants (CGs) and PUSCH transmissions based on type 2CGs. For type 1CGs, all parameters for PUSCH transmissions may be signaled by higher layers. For type 2CGs, some parameters for PUSCH transmissions may be signaled by higher layers, and the rest may be signaled via PDCCH. Basically, in CS, PUSCH transmissions may not be associated with PDCCH.

[0067] (2) PUCCH

[0068] PUCCH can carry UCI. UCI includes the following information.

[0069] - Scheduling Request (SR): SR is information for requesting UL-SCH resources.

[0070] - Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK): HARQ-ACK is a signal in response to the reception of a DL signal (e.g., PDSCH, SPS release PDCCH, etc.). HARQ-ACK responses may include positive ACK (ACK), negative ACK (NACK), DTX (discontinuous transmission), or NACK / DTX. HARQ-ACK can be used interchangeably with A / N, ACK / NACK, HARQ-ACK / NACK, etc. HARQ-ACK can be generated based on TB / CBG.

[0071] - Channel State Information (CSI): CSI is feedback information about the DL channel. CSI includes Channel Quality Indicator (CQI), Rank Indicator (RI), Precoding Matrix Indicator (PMI), Precoding Type Indicator (PTI), etc.

[0072] Table 4 shows the PUCCH formats. PUCCH formats can be classified according to UCI payload size / transmission length (e.g., the number of symbols included in the PUCCH resource) and / or transmission structure. PUCCH formats can be classified into short PUCCH formats (PUCCH formats 0 and 2) and long PUCCH formats (PUCCH formats 1, 3, and 4) according to transmission length.

[0073] [Table 4]

[0074]

[0075] (0) PUCCH format 0 (PF0)

[0076] - Supported UCI payload size: up to K bits (e.g., K=2)

[0077] -Number of OFDM symbols included in one PUCCH: 1 to X symbols (e.g., X=2)

[0078] -Transmission structure: Only the UCI signal is configured without DM-RS, and the UCI status is transmitted by selecting and sending one of multiple sequences.

[0079] (1) PUCCH format 1 (PF1)

[0080] - Supported UCI payload size: up to K bits (e.g., K=2)

[0081] - Number of OFDM symbols included in one PUCCH: Y to Z symbols (e.g., Y=4 and Z=14)

[0082] Transmission Structure: UCI and DM-RS are allocated in different OFDM symbols based on time division multiplexing (TDM). For UCI, a specific sequence is multiplied by the modulation symbol (e.g., QPSK symbol). Cyclic shift / orthogonal cover code (CS / OCC) is applied to both UCI and DM-RS to support code division multiplexing (CDM) across multiple PUCCH resources (compliant with PUCCH format 1) within the same RB.

[0083] (2) PUCCH format 2 (PF2)

[0084] - Supportable UCI payload size: more than K bits (e.g., K=2)

[0085] -Number of OFDM symbols included in one PUCCH: 1 to X symbols (e.g., X=2)

[0086] -Transmission structure: UCI and DMRS (DM-RS) are configured / mapped to the same symbol based on frequency division multiplexing (FDM), and coded UCI bits are transmitted by applying only inverse fast Fourier transform (IFFT) thereto without DFT.

[0087] (3) PUCCH format 3 (PF3)

[0088] - Supportable UCI payload size: more than K bits (e.g., K=2)

[0089] - Number of OFDM symbols included in one PUCCH: Y to Z symbols (e.g., Y=4 and Z=14)

[0090] Transmission structure: UCI and DMRS are allocated / mapped to different symbols based on time division multiplexing (TDM). The encoded UCI bits are transmitted by applying DFT to them. To support multiplexing between multiple UEs, OCC is applied to UCI, and CS (or interleaved frequency division multiplexing (IFDM) mapping) is applied to DM-RS before DFT.

[0091] (4) PUCCH format 4 (PF4)

[0092] - Supportable UCI payload size: more than K bits (e.g., K=2)

[0093] -Number of OFDM symbols included in one PUCCH: Y to Z symbols (e.g., Y=4 and Z=14)

[0094] -Transmission structure: UCI and DMRS are allocated / mapped to different symbols based on TDM. DFT is applied to the coded UCI bits without multiplexing between UEs.

[0095] Figure 4 ACK / NACK transmission processing is shown. Figure 4 , the UE can detect the PDCCH in time slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or DCI format 1_1). The PDCCH indicates the DL assignment to PDSCH offset K0 and the PDSCH to HARQ-ACK report offset K1. For example, DCI format 1_0 or DCI format 1_1 may include the following information.

[0096] - Frequency domain resource assignment: indicates the RB set assigned to PDSCH.

[0097] - Time domain resource assignment: indicates K0 and the starting position (eg, OFDM symbol index) and length (eg, number of OFDM symbols) of the PDSCH in the slot.

[0098] -PDSCH to HARQ_feedback timing indicator: indicates K1.

[0099] After receiving the PDSCH in time slot #(n+K0) according to the scheduling information of time slot #n, the UE may send UCI on the PUCCH in time slot #(n+K1). The UCI includes a HARQ-ACK response to the PDSCH. In the case where the PDSCH is configured to carry a maximum of one TB, the HARQ-ACK response may be configured in one bit. In the case where the PDSCH is configured to carry up to two TBs, the HARQ-ACK response may be configured in two bits if spatial bundling is not configured, and in one bit if spatial bundling is configured. When time slot #(n+K1) is designated as the HARQ-ACK transmission timing of multiple PDSCHs, the UCI sent in time slot #(n+K1) includes HARQ-ACK responses to multiple PDSCHs.

[0100] 1. Wireless communication systems supporting unlicensed frequency bands

[0101] Figure 5 An exemplary wireless communication system supporting unlicensed frequency bands suitable for use with the present disclosure is shown.

[0102] In the following description, a cell operating in a licensed band (L-band) is defined as an L-cell, and a carrier of the L-cell is defined as a (DL / UL) LCC. A cell operating in an unlicensed band (U-band) is defined as a U-cell, and a carrier of the U-cell is defined as a (DL / UL) UCC. A carrier / carrier frequency of a cell may refer to an operating frequency (e.g., center frequency) of the cell. A cell / carrier (e.g., CC) is generally referred to as a cell.

[0103] When BS and UE are Figure 5 When sending and receiving signals on the LCC and UCC of carrier aggregation as shown in (a), the LCC and UCC can be configured as the primary CC (PCC) and the secondary CC (SCC) respectively. Figure 5 As shown in (b), signals are sent and received on one UCC or on multiple carrier-aggregated UCCs. In other words, the BS and UE can send and receive signals only on the UCC without using any LCC. For SA operation, PRACH, PUCCH, PUSCH, and SRS transmission can be supported on the UCell.

[0104] Signal transmission and reception operations in the unlicensed band as described in this disclosure are applicable to the above-mentioned deployment scenarios (unless otherwise specified).

[0105] Unless otherwise stated, the following definitions apply to the following terms used in this disclosure.

[0106] - Channel: A carrier or a portion of a carrier consisting of a set of contiguous RBs that perform a channel access procedure (CAP) in a shared spectrum.

[0107] - Channel Access Procedure (CAP): A procedure for evaluating channel availability based on sensing before signal transmission in order to determine whether other communication nodes are using the channel. The basic sensing unit is a unit of duration T sl＝ 9us sensing time slot. The BS or UE senses the time slot during the sensing time slot duration. When the power detected within at least 4us during the sensing time slot duration is less than the energy detection threshold X thresh When the sensing time slot duration is T sl is considered idle. Otherwise, the sensing slot duration is T sl CAP can also be called Listen Before Talk (LBT).

[0108] - Channel occupancy: Transmissions from BS / UE on the channel after CAP

[0109] Channel Occupancy Time (COT): The total time that a BS / UE and any BS / UE sharing the channel occupancy perform transmissions on the channel after the CAP. For COT determination, if a transmission gap is less than or equal to 25 μs, the gap duration may be counted towards the COT. The COT may be shared for transmissions between a BS and corresponding UE.

[0110] -DL transmission burst: A set of transmissions from a BS without any gaps greater than 16 us. Transmissions from a BS separated by gaps greater than 16 us are considered separate DL transmission bursts. The BS may perform transmissions after a gap within a DL transmission burst without sensing channel availability.

[0111] -UL transmission burst: A set of transmissions from a UE without any gaps greater than 16 us. Transmissions from a UE separated by gaps greater than 16 us are considered separate UL transmission bursts. A UE may transmit after a gap within a DL transmission burst without sensing channel availability.

[0112] - Discovery burst: A DL transmission burst including a set of signals and / or channels confined within a window and associated with a duty cycle. The discovery burst can include transmissions initiated by the BS including PSS, SSS, and cell-specific RS (CRS), and also including non-zero-power CSI-RS. In an NR system, the discovery burst can include transmissions initiated by the BS including at least an SS / PBCH block and also including a CORESET for PDCCH scheduling PDSCH carrying SIB1, PDSCH carrying SIB1, and / or non-zero-power CSI-RS.

[0113] Figure 6 A method of resource occupation in the U-band is shown. According to the regional regulation of the U-band, a communication node in the U-band needs to determine whether a channel is used by other communication nodes before transmitting a signal. Specifically, the communication node can perform carrier sensing (CS) before transmitting a signal to check whether other communication nodes perform signal transmission. When other communication nodes do not perform signal transmission, it can be said that a clear channel assessment (CCA) is performed. When the CCA threshold is predefined or configured by high layer signaling (e.g., RRC signaling), if the detected channel energy is higher than the CCA threshold, the communication node can determine that the channel is busy. Otherwise, the communication node can determine that the channel is idle. The Wi-Fi standard (802.11ac) specifies a CCA threshold of -62 dBm for non-Wi-Fi signals and a CCA threshold of -82 dBm for Wi-Fi signals. When the channel is determined to be idle, the communication node can start signal transmission in the UCell. The above-mentioned process can be referred to as listen before talk (LBT) or channel access procedure (CAP) in its entirety. In this document, LBT, CAP, and CCA can be used interchangeably.

[0114] Specifically, for DL reception / UL transmission in the U-band, at least one of the following CAP methods described below can be employed in the wireless communication system according to the present disclosure.

[0115] DL signal transmission method in U band

[0116] The BS can perform one of the following U-band access procedures (e.g., CAP) for DL signal transmission in the U-band.

[0117] (1) Type 1 DL CAP method

[0118] In the Type 1 DL CAP, the length of the duration spanned by the sensing time slots that are sensed to be idle before transmission can be random. The Type 1 DL CAP can be applied to the following transmissions:

[0119] - a transmission initiated by the BS comprising (i) a unicast PDSCH with user plane data or (ii) a unicast PDCCH scheduling user plane data in addition to a unicast PDSCH with user plane data, or

[0120] - BS-initiated transmissions, including (i) only discovery bursts or (ii) discovery bursts multiplexed with non-unicast information.

[0121] Figure 7 is a flowchart illustrating a CAP operation performed by a BS to transmit a DL signal in a U-band.

[0122] Reference Figure 7 , BS can sense the channel after delaying for a duration of T d Then, if the counter N is zero, the BS may perform transmission (S1234). In this case, the BS may adjust the counter N by sensing the channel during the additional sensing slot duration according to the following steps:

[0123] Step 1) (S1220) BS sets N to N init (N=N init ), where N init It is between 0 and CW p Then, proceed to step 4.

[0124] Step 2) (S1240) If N>0 and the BS determines to decrease the counter, the BS sets N to N-1 (N=N-1).

[0125] Step 3) (S1250) The BS senses the channel during the additional sensing time slot duration. If the additional sensing time slot duration is idle (Yes), proceed to Step 4. Otherwise (No), proceed to Step 5.

[0126] Step 4) (S1230) If N=0 (Yes), the BS terminates the CAP (S1232). Otherwise (No), proceed to Step 2.

[0127] Step 5) (S1260) BS senses the channel until the additional delay duration T d A busy sensing time slot is detected or an additional delay duration T is added d All time slots are detected as idle.

[0128] Step 6) (S1270) If the additional delay duration T d If the channel is sensed as idle for all time slots of (yes), proceed to step 4. Otherwise (no), proceed to step 5.

[0129] Table 5 shows the m applied to CAPp , minimum contention window (CW), maximum CW, maximum channel occupancy time (MCOT) and allowed CW size vary according to the channel access priority class.

[0130] [Table 5]

[0131]

[0132] Delay duration T d Configure in the following order: Duration T f (16us)+m p The duration of the continuous sensing time slot is T sl (9us). T f Including the sensing time slot duration T at the beginning of 16us duration sl .

[0133] Satisfies the following relationship: CW min,p <=CW p <=CW max,p .CW p Available from CW p =CW min,p Initially configured and updated (CW size update) based on HARQ-ACK feedback (eg, ACK or NACK) for the previous DL burst (eg, PDSCH) before step 1. For example, CW p Can be initialized to CW based on HARQ-ACK feedback for previous DL burst min,p Alternatively, The CW p May be increased to the next highest allowed value or left as is.

[0134] (2) Type 2DL CAP method

[0135] In a Type 2 DL CAP, the length of the duration spanned by a sensing slot sensed as idle before transmission may be determined. Type 2 DL CAPs are classified into Type 2A / 2B / 2C DL CAPs.

[0136] Type 2A DL CAP can be applied to the following transmissions. In Type 2A DL CAP, the BS can transmit the data at least during the sensing duration T short_dl = Transmission is performed immediately after the channel is sensed as idle within 25us. Here, T short_dl Including duration T f (=16us) and immediately after the duration T f The duration of a sensing time slot is T f A sensing time slot is included at its beginning.

[0137] - a transmission initiated by the BS, consisting of (i) only a discovery burst or (ii) a discovery burst multiplexed with non-unicast information, or

[0138] - BS's transmission after a gap of 25 us relative to the UE's transmission within the shared channel occupancy.

[0139] Type 2B DL ​​CAP is applicable to transmissions performed by the BS after a 16us gap relative to the UE's transmission during the shared channel occupancy time. In Type 2B DL ​​CAP, the BS may f = Transmission is performed immediately after the channel is sensed as idle within 16us. f The sensing time slot is included within 9us relative to the end of the duration. Type 2C DL CAP is applicable to transmissions performed by the BS within the shared channel occupation time and at most 16us after the UE's transmission. In Type 2C DL CAP, the BS does not perform channel sensing before performing transmission.

[0140] UL signal transmission method in U-band

[0141] The UE may implement Type 1 or Type 2 CAP for UL signal transmission in the U-band. Typically, the UE may implement the CAP (e.g., Type 1 or Type 2) configured by the BS for UL signal transmission. For example, an UL grant (e.g., DCI formats 0_0 and 0_1) scheduling PUSCH transmission may include CAP type indication information for the UE.

[0142] (1) Type 1 UL CAP method

[0143] In a Type 1 UL CAP, the length of the duration spanned by a sensing slot that is sensed as idle before a transmission is random. The Type 1 UL CAP is applicable to the following transmissions.

[0144] - PUSCH / SRS transmission scheduled and / or configured by the BS

[0145] - PUCCH transmissions scheduled and / or configured by the BS

[0146] - Transmissions related to the Random Access Procedure (RAP)

[0147] Figure 8 is a flow chart illustrating CAP operations performed by a UE to transmit a UL signal.

[0148] Reference Figure 8 , the UE can sense the channel after the delay duration T dThen, if the counter N is zero, the UE may perform transmission (S1534). In this case, the UE may adjust the counter N by sensing the channel during the additional sensing slot duration according to the following steps:

[0149] Step 1) (S1520) UE sets N to N init (N=N init ), where N init It is between 0 and CW p Then, proceed to step 4.

[0150] Step 2) (S1540) If N>0 and the UE determines to decrease the counter, the UE sets N to N-1 (N=N-1).

[0151] Step 3) (S1550) The UE senses the channel during the additional sensing time slot duration. If the additional sensing time slot duration is idle (yes), proceed to step 4. Otherwise (no), proceed to step 5.

[0152] Step 4) (S1530) If N=0 (Yes), the UE terminates the CAP (S1532). Otherwise (No), proceed to step 2.

[0153] Step 5) (S1560) UE senses the channel until the additional delay duration T d A busy sensing time slot is detected or an additional delay duration T is added d All time slots are detected as idle.

[0154] Step 6) (S1570) If the additional delay duration T d If the channel is sensed as idle for all time slots of (yes), proceed to step 4. Otherwise (no), proceed to step 5.

[0155] Table 6 shows the m applied to CAP p , minimum CW, maximum CW, MCOT and allowed CW size vary according to the channel access priority category.

[0156] [Table 6]

[0157]

[0158] Delay duration T d Configure in the following order: Duration T f (16us)+m p The duration of the continuous sensing time slot is T sl (9us). T f Including the sensing time slot duration T at the beginning of 16us durationsl .

[0159] Satisfies the following relationship: CW min,p <=CW p <=CW max,p .CW p Available from CW p =CW min,p Initially configured and updated (CW size update) based on explicit / implicit reception response to previous UL burst (e.g., PUSCH) before step 1. For example, CW p Can be initialized to CW based on explicit / implicit reception response to previous UL burst min,p Alternatively, The CW p May be increased to the next highest allowed value or left as is.

[0160] (2) Type 2 UL CAP method

[0161] In a Type 2 UL CAP, the length of the duration spanned by the sensing slot that is sensed as idle before transmission may be determined. Type 2 UL CAP is classified as Type 2A / 2B / 2C UL CAP. In a Type 2A UL CAP, the UE may determine the duration of the sensing slot that is sensed as idle before transmission. short_dl = Transmission is performed immediately after the channel is sensed as idle within 25us. Here, T short_dl Including duration T f (=16us) and immediately after the duration T f The duration of a sensing slot after that. In Type 2A ULCAP, T f In a Type 2B UL CAP, the UE may use a sensing time slot at the beginning of the sensing time slot. f = Transmission is performed immediately after the channel is sensed as idle within 16us. In Type 2B UL CAP, T f Includes a sensing slot within 9us relative to the end of the duration. In Type 2C UL CAP, the UE does not perform channel sensing before performing transmission.

[0162] RB interweaving

[0163] Figure 9 RB interleaving is shown. In a shared spectrum, taking into account the provisions on occupied channel bandwidth (OCB) and power spectral density (PSD), a set of non-contiguous RBs (at regular intervals) in the frequency domain (or a single RB) can be defined as a resource unit used / allocated to transmit UL (physical) channels / signals. For convenience, such a set of non-contiguous RBs is defined as an RB interleave (or interleave).

[0164] Reference Figure 9 , multiple RB interlaces (interlaces) may be defined in a frequency bandwidth. Here, the frequency bandwidth may include a (wideband) cell / CC / BWP / RB set, and the RBs may include PRBs. For example, interlace #m∈{0,1,...,M-1} may consist of (common) RBs {m,M+m,2M+m,3M+m,...}, where M represents the number of interlaces. A transmitter (e.g., a UE) may use one or more interlaces to transmit a signal / channel. The signal / channel may include a PUCCH or a PUSCH.

[0165] 3. PUCCH transmission in U-band

[0166] The above description (NR frame structure, RACH, U-band system, etc.) is applicable to the combination with the method proposed in the present disclosure, which will be described later. Alternatively, the description can clarify the technical features of the method proposed in the present disclosure.

[0167] In addition, the PRACH preamble code design method described later may be related to UL transmission. Therefore, these methods can also be applied to the above-mentioned UL signal transmission method in the U-band system. In order to implement the technical concept of this disclosure in corresponding systems, the terms, expressions, and structures in this document may be modified to be suitable for these systems.

[0168] For example, UL transmission based on the following PUCCH transmission method may be performed on an L cell and / or a U cell defined in a U-band system.

[0169] As mentioned above, the Wi-Fi standard (802.11ac) specifies a CCA threshold of -62dBm for non-Wi-Fi signals and a CCA threshold of -82dBm for Wi-Fi signals. In other words, if a station (STA) or access point (AP) of a Wi-Fi system receives a signal at a power of -62dBm or higher in a specific frequency band from a device not included in the Wi-Fi system, the STA or AP may not transmit a signal in that specific frequency band.

[0170] In this document, the term "U-band" is used interchangeably with the term "shared spectrum."

[0171] When a specific device (and / or node) sends a signal in a shared spectrum, there may be limitations in terms of PSD. For example, according to the European Telecommunications Standards Institute (ETSI), signal transmission in a specific frequency band needs to meet a PSD of 10dBm / 1MHz. When the SCS is 15kHz, if the PUSCH is sent in 5 PRBs (900kHz), the maximum allowed power of the PUSCH may be approximately 10dBm. Typically, the maximum power of a UE is 23dBm, and the maximum allowed power of 10dBm is significantly lower than 23dBm. If the UE sends UL at 10dBm, the maximum UL coverage supported by the UE may be reduced. If the UE sends PUCCH in a wide frequency domain (F domain) to increase the transmit power, it may help solve the problem of reduced UL coverage.

[0172] As part of shared spectrum regulations, there may be restrictions on OCB. For example, when a specific device transmits a signal, that signal may need to occupy at least 80% of the system bandwidth. If the system bandwidth is 20 MHz, the signal transmitted by the specific device may need to occupy more than 16 MHz (80% of 20 MHz).

[0173] As a PUCCH structure that takes into account PSD and OCB-related regulations, the above-mentioned RB interleaving structure can be used. Table 7 shows the total number of PRBs in the bandwidth of each SCS.

[0174] [Table 7]

[0175]

[0176] Referring to Table 7, when the SCS is 30 kHz, the total number of PRBs in the 20 MHz bandwidth is 51. It can be considered that 51 PRBs use a total of five interlaces. Each interlace consists of 10 or 11 PRBs. The interval between the PRBs included in each interlace is five PRBs (relative to the starting point). Figure 10 An example is shown in which five interlaces are configured at 20 MHz in a 30 kHz SCS (interlace index #0 consists of 11 PRBs, and each of interlace indexes #1 to #4 consists of 10 PRBs). In this case, among the five interlaces, the interlace that occupies a smaller frequency band when transmitting and receiving signals and / or channels can also occupy more than 80% of 20 MHz. For example, each interlace with interlace indexes #1 to #4 also occupies 46 (PRB) * 30 (SCS) * 12 (subcarriers) = 16560 kHz, which exceeds 16000 kHz (i.e., 80% of 20 MHz).

[0177] Referring to Table 7, when the SCS is 15 kHz, the total number of PRBs in a 20 MHz bandwidth is 106. It can be considered that 106 PRBs use a total of 10 interlaces. Each interlace consists of 10 or 11 PRBs. The interval between the PRBs included in each interlace is 10 PRBs (relative to the starting point). Figure 11 An example is shown in which 10 interlaces are configured at 20 MHz in a 15 kHz SCS (each of interlace indices #0 to #5 consists of 11 PRBs, and each of interlace indices #6 to #9 consists of 10 PRBs). In this case, among the 10 interlaces, the interlace that occupies a smaller frequency band while transmitting and receiving signals and / or channels can also occupy more than 80% of 20 MHz. For example, each interlace with interlace indices #6 to #9 also occupies 91 (PRB) * 15 (SCS) * 12 (subcarriers) = 16380 kHz, which exceeds 16000 kHz (i.e., 80% of 20 MHz).

[0178] In an NR system, when a UE performs initial access in the U-band, it may not know the SCS of the SS / PBCH blocks configured by the BS. Therefore, to reduce UE implementation complexity, the UE can be restricted to using a 30kHz SCS when performing initial access in the U-band.

[0179] In the legacy NR system, the MIB sent on the PBCH indicates the SCS of CORESET#0 as 15kHz or 30kHz. However, in the NR U-band, the SCS of CORESET#0 is always the same as the SCS of the SS / PBCH block (existing on the same carrier). For example, when the SCS of the SS / PBCH block is 30kHz, the SCS of CORESET#0 becomes 30kHz, and when the SCS of the SS / PBCH block is 15kHz, the SCS of CORESET#0 becomes 15kHz.

[0180] In legacy NR systems, the number of PRBs in CORESET#0 can be indicated by the MIB sent on the PBCH. However, in the NRU band, the number of PRBs in CORESET#0 can be predetermined based on the SCS of CORESET#0. That is, if the SCS of CORESET#0 is 30kHz, the number of PRBs in CORESET#0 can be defined as 48. If the SCS of CORESET#0 is 15kHz, the number of RBs in CORESET#0 can be defined as 96.

[0181] In legacy NR systems, the initial active UL BWP is defined as equal to the bandwidth of CORESET # 0. In U-band, if there are no special restrictions, the UE can operate by assuming that the size of the initial active UL BWP is equal to the number of RBs in CORESET # 0 before RRC setup.

[0182] For example, when the SS / PBCH block and the SCS of CORESET#0 are 30kHz, the size of the initial active UL BWP can be 48 PRBs. When the SS / PBCH block and the SCS of CORESET#0 are 15kHz, the size of the initial active UL BWP can be 96 PRBs. Figure 10 If the interleaving structure defined in [4] is used as is, if the UE intends to use some interleaving indices to send signals / channels (during the initial access process), the UE may not meet the OCB requirements. In order to meet the OCB requirements, when a specific node sends a signal in the U band, the signal needs to occupy more than 80% of the LBT subband bandwidth. Therefore, when the UE sends a signal / channel in a bandwidth of 20 MHz, the signal needs to occupy a bandwidth of 1.6 MHz or more to meet the OCB requirements. In addition, a specific node needs to meet the OCB requirements at least once during a specific time window (e.g., one second). In the initial active UL BWP, UL interleaving can be used for / for Msg3 PUSCH and / or for A / N PUCCH of Msg4.

[0183] Hereinafter, a method of newly configuring / setting / sending UL interleaving when the predefined interleaving structure does not meet the OCB requirement under the assumption that the (initial) active UL BWP is less than 51 (51 PRBs) at 30kHz SCS and / or less than 106 (106 PRBs) at 15kHz SCS will be described.

[0184] Hereinafter, a UE operation of performing UL transmission based on the UL interleaving proposed in the present disclosure will be described.

[0185] (1) First, the UE may receive UL interlace configuration information for UL transmission from the base station. Here, the UL interlace configuration information may include a UL interlace index of a UL interlace that satisfies the defined OCB requirements for each SCS. (2) Second, the UE may determine at least one UL interlace based on the UL interlace configuration information. (3) Then, the UE may perform UL transmission to the base station based on the determined at least one UL interlace.

[0186] More specific details will be described with reference to the following embodiments.

[0187] 3.1. Implementation Method 1

[0188] Embodiment 1 relates to a method in which a BS indicates an interlace index that satisfies a specific condition (eg, OCB requirement) while maintaining a predefined interlace structure. The UE may transmit a signal and / or channel in the interlace having the indicated index.

[0189] Specifically, although the above reference Figures 10 and 11 Although the interlace structure described above is different, the BS may set the interlace that meets the OCB requirement as the available (valid) interlace in the initial active UL BWP. That is, the BS may set the interlace index that meets the OCB requirement as the available interlace index in the initial active UL BWP. In this case, other interlaces that do not meet the OCB requirement can be used by UEs that have already established an RRC connection (only in specific cases where the OCB requirement does not need to be met).

[0190] For example, if the SCS of CORESET#0 is 30kHz, the initial active UL BWP is set to 48 PRBs. If the initial active UL BWP is 48 PRBs, each interlace with index #0, #1, and #2 consists of 10 PRBs, and each interlace with index #3 and #4 consists of 9 PRBs, as shown in Figure 1. Figure 12 As shown. That is, if the UE uses an interleaving consisting of only 9 PRBs, the UE may transmit signals and / or channels by occupying only 41 (PRB) * 30 (SCS) * 12 (subcarriers) = 14760kHz, thereby possibly not meeting the OCB requirement. Here, the 41 PRBs may be calculated as follows. For an interleaving consisting of 9 PRBs, since the interval between PRBs is five PRBs (relative to the starting point), one PRB may be included in the interleaving for every five PRBs. Assuming that the first PRB of an interleaving consisting of 9 PRBs (e.g., PRB index #3) is included in the interleaving with index #3, the total number of PRBs included in the interleaving with index #3 among the first 40 consecutive PRBs is 8. That is, PRBs with indices #3, #8, #13, #18, #23, #28, #33, and #38 are included in the interleaving with index #3. A PRB that is five PRBs away from the PRB with index #38 (i.e., PRB index #43) is also included in the interlace with index #3. Therefore, the frequency band occupied by the interlace with index #3 is a total of 41 PRBs: the PRBs with indices #3 to #43. If the number of PRBs included in the interlace with index #3 is 10, the next PRB (i.e., PRB index #48) needs to be included, which is a value outside the bandwidth size of the initial active UL BWP. Therefore, the interlace with index #3 can consist of only 9 PRBs.

[0191] Three interlaces (interlace indices #0, #1, and #2), each consisting of 10 PRBs, that meet the OCB requirement can be used by a UE performing random access in the initial active UL BWP (i.e., a UE in RRC idle mode and / or RRC connected mode). Three interlaces (interlace indices #0, #1, and #2), each consisting of 10 PRBs, that meet the OCB requirement can be used by a UE that has not yet established an RRC connection and / or does not have a separate (UE-specific) UL BWP configuration. For example, a UE that has not yet established an RRC connection and / or does not have a separate (UE-specific) UL BWP configuration can use this interlace for Msg3 PUSCH transmission and / or HARQ-ACK feedback transmission for Msg4 reception. Two interlaces with indices #3 and #4, each consisting of 9 PRBs, that do not meet the OCB requirement can be used by a UE that has established an RRC connection (only in specific cases where the OCB requirement does not need to be met). The two interlaces with indices #3 and #4 that do not meet the OCB requirement may not be used by a UE performing random access. Additionally, the two interlaces with indices #3 and #4 that do not meet the OCB requirement may not be used by UEs that have not established an RRC connection and / or do not have a UL BWP configuration.

[0192] As another example, if the SCS of CORESET#0 is 15kHz, the initial active UL BWP is set to 96 PRBs. In this case, each interlace with index #0 to #5 consists of 10 PRBs, and each interlace with index #6 to #9 consists of 9 PRBs, as shown in FIG. Figure 13 That is, if the UE uses an interlace consisting of only 9 PRBs, the UE may transmit a signal and / or channel by occupying 81 (PRB)*15 (SCS)*12 (subcarriers)=14580 kHz, thereby possibly failing to meet the OCB requirement.

[0193] In this case, the six interlaces (interlace indices #0 to #5) each consisting of 10 PRBs that meet the OCB requirement can be used by a UE performing random access in the initial active UL BWP (i.e., a UE in RRC idle mode and / or RRC connected mode). The six interlaces (interlace indices #0 to #5) each consisting of 10 PRBs that meet the OCB requirement can be set as the interlaces available (valid) for UEs that have not yet established an RRC connection and / or do not have a separate (UE-specific) UL BWP configuration. For example, a UE that has not yet established an RRC connection and / or does not have a separate (UE-specific) UL BWP configuration can use the interlaces available for Msg3 PUSCH transmission and / or HARQ-ACK feedback transmission for Msg4 reception. The four interlaces (interlace indices #6 to #9) each consisting of 9 PRBs that do not meet the OCB requirement can be used by a UE that has established an RRC connection (only in specific cases where the OCB requirement does not need to be met). The four interlaces (interlace indices #6 to #9) that do not meet the OCB requirement may not be used by a UE performing random access. Additionally, four interlaces (interlace indices #6 to #9) that do not meet the OCB requirement may not be used by UEs that have not established an RRC connection and / or do not have a UL BWP configuration.

[0194] The method of embodiment 1 will be further described in terms of signaling between the BS and the UE. As described in the proposed method, the BS may inform the UE of one or more UL interlaces that meet the OCB requirement and instruct the UE to send Msg3 PUSCH and / or A / N PUCCH for Msg4. That is, the UE may be configured to expect that the BS will indicate one or more UL interlaces that meet the OCB requirement. In other words, the UE may expect that a UL interlace that does not meet the OCB requirement will not be indicated for Msg3 PUSCH or A / N PUCCH for Msg4. If a UL interlace that does not meet the OCB requirement is indicated, the UE may determine that an error has occurred. A disadvantage of the proposed method is that the number of UL interlaces that can be used for initial access processing is limited in terms of resource utilization of the BS.

[0195] In addition to the proposed method, the following method may also be considered. When the BS informs a UE of multiple UL interlaces including one or more UL interlaces that meet the OCB requirement, the UE may use multiple interlaces to send Msg3 PUSCH and / or A / N PUCCH for Msg4. If the UE sends a signal and / or channel in multiple indicated UL interlaces, the UE may meet the OCB requirement. In this case, the UE may be expected to indicate at least one UL interface that meets the OCB requirement. For example, when a UE is configured with Figure 12When interleaving index #0 and interleaving index #4 are used, the UE can perform UL transmission that meets the OCB requirement by sending one channel in two interleavings. When the UE sends one channel in multiple UL interleavings, the advantage is that the number of UL interleavings available for initial access processing increases.

[0196] In addition, the BS may inform a UE of multiple UL interlaces including only UL interlaces that do not meet the OCB requirement, and the UE may send Msg3 PUSCH or A / N PUCCH for Msg4 in the indicated interlace. To do this, the BS needs to first determine whether the combination of UL interlaces that do not meet the OCB requirement can meet the OCB requirement. If the combination of UL interlaces that do not meet the OCB requirement meets the OCB requirement, the BS may indicate the combination of UL interlaces to the UE. The UE may send Msg3 PUSCH or A / N PUCCH for Msg4 in the indicated combination of UL interlaces. Since the UE performs UL transmission based on the interlace that does not meet the OCB requirement, the advantage is that the number of UL interlaces available for initial access processing is maximized compared to the proposed method.

[0197] The following UE operations can be added to the above-mentioned proposed / configuration methods. In the current NR system, the BS can indicate the PUCCH resource list to the UE through high-layer signaling (e.g., PUCCH-Config) or a predefined configuration (e.g., Table 9.2.1-1 in TS 38.213). Thereafter, the BS can provide the PUCCH resource index to the UE in a 3-bit (or 4-bit) field in the remaining minimum system information (RMSI) and / or DCI format. Based on this, the following BS / UE operations can be defined in the NR-U system.

[0198] First, when the BS configures the PUCCH resource list, it may include only UL interlace indices that meet the OCB requirement in the PUCCH resource list. That is, when the BS configures the PUCCH resource list, it may exclude UL interlace indices that do not meet the OCB requirement from the PUCCH resource list. Specifically, when configuring the PUCCH resource list, the PUCCH resource list may not be fully populated with only a single UL interlace and initial CS index.

[0199] In this case, (1) the BS may indicate PUCCH resources to the UE by leaving some indexes of the PUCCH resource list blank. The UE may expect that no empty indexes are indicated. If the BS indicates empty indexes of the PUCCH resource list as PUCCH resource indexes, the UE may ignore these PUCCH resource indexes.

[0200] Alternatively, (2) the BS may configure the empty index of the PUCCH resource list as a combination of multiple UL interlaces. That is, the BS may configure a combination of multiple UL interlaces including at least one UL interlace that meets the OCB requirement and add the combination of the multiple UL interlaces to the PUCCH resource list. Alternatively, the BS may configure a combination of multiple UL interlaces that do not meet the OCB requirement among the UL interlaces so that the combination of the multiple UL interlaces meets the OCB requirement and add the combination of the multiple UL interlaces to the PUCCH resource list. The UE may determine that all PUCCH resource indexes are meaningful and follow the instructions of the BS.

[0201] Alternatively, (3) when the BS fills an empty index of the PUCCH resource list, the BS may use the next symbol of the current PUCCH symbol. That is, the BS may fill the PUCCH resource list by configuring a single UL interlace that meets the OCB requirement to be sent in the next symbol of the current PUCCH symbol.

[0202] Alternatively, (4) the BS may fill empty indices of the PUCCH resource list by reusing previously used PUCCH resources. That is, the same PUCCH resource may be indicated by multiple indices. The UE may determine that all PUCCH resource indices are meaningful and follow the instructions of the BS.

[0203] For example, if the SCS of CORESET#0 is 30kHz, the initial UL BWP is set to 48 PRBs. In this case, each interlace with index #0, #1, and #2 consists of 10 PRBs, and each interlace with index #3 and #4 consists of only 9 PRBs, as shown in Figure 2. Figure 12 As shown. That is, the interleaving with indexes #3 and #4 does not meet the OCB requirement. If the BS intends to set 8 PUCCH resource indexes to PUCCH format 0, 6 PUCCH resource indexes among the 8 PUCCH resource indexes can be configured with a combination of three interleaving indexes (#0, #1 and #2) and two starting CS offsets (#0 and #6). The remaining two PUCCH resource indexes can be configured by treating the combination of interleaving indexes #0 and #4 as one PUCCH resource and combining the combination with the starting CS offsets (#0 and #6). Alternatively, the remaining two PUCCH resource indexes in the PUCCH resource list can be reconfigured from the first interleaving after the next symbol of the OFDM symbol indicated by the BS.

[0204] Secondly, when the BS configures the PUCCH resource list, the BS may use all configured UL interleaving indices regardless of whether the OCB requirement is met. That is, when the BS configures the PUCCH resource list, the BS may use all configured UL interleaving indices.

[0205] The following BS operations and UE operations may be considered. (1) The BS configures a PUCCH resource list by including all UL interlace indices and indicates the configured PUCCH resource list to the UE. The UE determines whether the OCB requirement is met based on the UL interlace indices included in the PUCCH resource list. Thereafter, the UE may not indicate a PUCCH resource index that uses only a UL interlace that does not meet the OCB requirement. If the BS indicates a PUCCH resource index that uses only a UL interlace that does not meet the OCB requirement, the UE may ignore the PUCCH resource index.

[0206] The proposed method can be summarized as follows: When the number of bits indicating PUCCH resources signaled by the DCI field or CCE resource index in the PDCCH is K, the maximum number of PUCCH resources that can be configured in the PUCCH resource set configured by SIB / RMSI (based on a set of PUCCH resource related parameters) can be N=2 K On the other hand, when N PUCCH resources are (virtually) configured based on a set of PUCCH resource-related parameters (configured by SIB / RMSI), if the number of resources that meet the OCB requirement is M and the number of resources that do not meet the OCB requirement is L (i.e., N=M+L), the set of PUCCH resources allocated to / available for the UE may be configured as follows.

[0207] Method (1): A PUCCH resource set may be configured with a total of N PUCCH resources, including M PUCCH resources that meet the OCB requirement and L PUCCH resources that do not meet the OCB requirement. In other words, the PUCCH resource set may include PUCCH resources corresponding to a total of N PUCCH resource indices, including M PUCCH resource indices that meet the OCB requirement and L PUCCH resource indices that do not meet the OCB requirement. In this case, the UE may operate under the assumption that the gNB only indicates the M PUCCH resource indices that meet the OCB requirement (or that only the M PUCCH resource indices that meet the OCB requirement are available / transmittable).

[0208] Method (2): A PUCCH resource set with a total of N PUCCH resource indices may be configured by mapping only the M PUCCH resources that meet the OCB requirement to the N PUCCH resource indices. In this case, the actual number of allocated PUCCH resources may be M. Some (e.g., L) PUCCH resource indices may indicate the same PUCCH resource.

[0209] Method (3): A PUCCH resource set may be configured to have a total of N PUCCH resources, including M PUCCH resources that meet the OCB requirement and an additional L PUCCH resource. In other words, the PUCCH resource set may include PUCCH resources corresponding to a total of N PUCCH resource indices including M PUCCH resource indices that meet the OCB requirement and an additional L PUCCH resource indices. The additional PUCCH resources may be obtained by configuring a single PUCCH resource in the form of multiple interlaces (or interlaces with multiple indices). Additionally / alternatively, the additional PUCCH resources may be PUCCH resources configured by applying a value other than a configured PUCCH resource-related parameter (e.g., a different starting symbol index).

[0210] Hereinafter, before describing the method proposed in the present disclosure in detail, a PUCCH resource set and a PUCCH resource indicator (PRI) will be briefly reviewed.

[0211] If the UE does not have a dedicated PUCCH resource configuration provided by PUCCH-ResourceSet in PUCCH-config, the PUCCH resource set is provided by pucch-ResourceCommon. The PUCCH resource set indicated by pucch-ResourceCommon can be determined based on a row index of Table 8 to Table 34 for use in HARQ-ACK information is transmitted on the PUCCH in the initial UL BWP of RBs. The PUCCH resource set includes 16 resources. For each PUCCH resource, the PUCCH format, the first symbol used for PUCCH transmission, the PUCCH duration, the PRB offset used for PUCCH transmission are configured. and the CS index set for PUCCH transmission. The UE transmits PUCCH based on frequency hopping. The OCC with index 0 is used for PUCCH resources with PUCCH format 1 in Table 8. The UE transmits PUCCH using the same spatial transmission filter as used for PUSCH scheduled by RAR UL grants, as described in clause 8.3 of 3GPP Rel-16 38.214. If the UE is not provided with the pdsch-HARQ-ACK-Codebook, the UE generates at most one HARQ-ACK information bit.

[0212] If the UE needs to provide HARQ-ACK information in a PUCCH transmission in response to detecting DCI format 1_0 or DCI format 1_1, the UE determines the PUCCH resource. The index of the PUCCH resource is r PUCCH , where 0 = <r PUCCH =<15 and N CCEis the number of CCEs used for PDCCH reception in a CORESET with DCI format 1_0 or DCI format 1_1, n CCE,0 is the index of the first CCE used for PDCCH reception, Δ PRI It is the value of the PRI field of DCI format 1_0 or DCI format 1_1.

[0213] if The UE determines the PRB index of the PUCCH transmission in the first hop as And the PRB index of the PUCCH transmission in the second hop is determined as where N CS is the total number of initial CS indices in the initial cyclic shift index set. In addition, the UE determines the initial cyclic shift index in the initial cyclic shift index set as r PUCCH mod N CS .

[0214] if The UE determines the PRB index of the PUCCH transmission in the first hop as And the PRB index of the PUCCH transmission in the second hop is determined as The UE determines the initial cyclic shift index in the initial cyclic shift index set as (r PUCCH -8)mod N CS .

[0215] It is the symbol for the floor operation, meaning the largest natural number or integer not exceeding x.

[0216] [Table 8]

[0217]

[0218] The PRI may be included in DCI format 1_0 and DCI format 1_1. The PUCCH resources of the UE may be determined based on the PRI.

[0219] The PRI field value is mapped to the value of the PUCCH resource index set as defined in Table 9. The PUCCH resource index set is provided by the ResourceList of the PUCCH resource from the PUCCH-RsourceSet, which includes a PUCCH resource set of up to 8 PUCCH resources.

[0220] [Table 9]

[0221]

[0222] The method proposed in Embodiment 1 will be described in more detail. The following three main methods can be considered.

[0223] [1] Method 1: Define a table configured with 8 PUCCH resource sets without configuring any cell-specific PRB (interlace) offset. Each PUCCH resource set may include 16 PUCCH resources. One of the PUCCH resource sets may be indicated by 3-bit signaling in the RMSI. Specifically, the PUCCH resource may be indicated by a 3-bit PRI + 1-bit CCE (= 16 states).

[0224] [2] Method 2: A table of 16 PUCCH resource sets is defined with a cell-specific PRB (interlace) offset. Each PUCCH resource set includes 8 PUCCH resources. One of the PUCCH resource sets can be indicated by 4-bit signaling in the RMSI. Specifically, the PUCCH resource can be indicated by a 3-bit PRI (= 8 states).

[0225] [3] Method 3: A table of 16 PUCCH resource sets is defined with a cell-specific PRB (interlace) offset. Each PUCCH resource set includes 16 PUCCH resources. One of the PUCCH resource sets can be indicated by 4-bit signaling in the RMSI. Specifically, a PUCCH resource can be indicated by a 3-bit PRI + 1-bit CCE (= 16 states).

[0226] RMSI may refer to SIB. A 3-bit PRI may be signaled in a specific field of a DL grant DCI. A 1-bit CCE may be determined based on a CCE index of a PDCCH used to transmit the DL grant DCI.

[0227] RMSI may refer to SIB. A 3-bit PRI may be signaled in a specific field of a DL grant DCI. A 1-bit CCE may be determined based on a CCE index of a PDCCH used to transmit the DL grant DCI.

[0228] When using the UL interlace index in the initial UL BWP, Method 1 may have the following three options. Since the UE expects that the initial UL BWP will operate at 30 kHz SCS, these options will be described based on 30 kHz SCS.

[0229] (1) Option 1: Three interleaving indices that meet the OCB requirement can be used in the previously defined interleaving structure (e.g., Figure 12 interleaved indices #0, #1 and #2 in .

[0230] (2) Option 2: Five interleaving indices may be used in the previously defined interleaving structure regardless of whether the OCB requirement is met.

[0231] (3) Option 3: Four interleaving indices may be used regardless of whether the previously defined interleaving structure or the interleaving structure newly introduced in Embodiment 2 is used.

[0232] According to Method 1, a PUCCH resource set table based on 3-bit RMSI signaling without a cell-specific interlace offset can be defined as shown in Table 10. In NR-U, since the UL resources used to transmit PUCCH format 0 / 1 are one interlace consisting of multiple PRBs rather than one PRB, considering the impact of interference between adjacent cells, it may not be necessary to configure a cell-specific PRB offset. Therefore, the existing PUCCH resource set table based on 4-bit RMSI signaling can be modified to a PUCCH resource set table based on 3-bit RMSI signaling as shown in Table 10.

[0233] [Table 10]

[0234] index PUCCH format First symbol Number of symbols Initial CS index set 0 0 12 2 {0,3} 1 0 12 2 {0,4,8} 2 1 10 4 {0,6} 3 1 10 4 {0,3,6,9} 4 1 4 10 {0,6} 5 1 4 10 {0,3,6,9} 6 1 0 14 {0,6} 7 1 0 14 {0,3,6,9}

[0235] In this case, the method and operation of indicating PUCCH resources using a 3-bit PRI + 1-bit CCE (= 16 states) can be configured as follows, depending on the number of interleavings defined in each option. The capacity of OCC indexes described in this document can be based on the number of PUCCH symbols. That is, if the number of symbols is 14, a maximum of 7 OCC indexes can be used. If the number of symbols is 10, a maximum of five OCC indexes can be used. If the number of symbols is 4, a maximum of two OCC indexes can be used.

[0236] Proposal 1) Describe the same as in Option 1 Figure 12 The case where three interleavings are used among the five interleavings.

[0237] A. For (RMSI value) indices 3, 5, and 7 of Table 10, a combination of one of three interleaving indices and one of four CS indices (i.e., 0, 3, 6, and 9) is indicated. OCC index #0 is applied. Therefore, 3*4=12 states are configured for PUCCH resources. Since the number of PUCCH resources (r PUCCH ) needs to be 16, so the remaining four states are used to indicate one of the four PUCCH resources based on other OCC indices (e.g., #1). For example, it indicates a combination of one interlace (e.g., interlace index #0) and one of the four CSs. OCC index #1 is used for the remaining four states.

[0238] B. For (RMSI values) indices 4 and 6 in Table 10, a combination of one of three interleaving indices, one of two CS indices (i.e., 0 and 6), and one of two OCC indices (e.g., indices 0 and 1) is indicated. Thus, 3*2*2=12 states are configured for the PUCCH resource. The remaining four states are used to indicate one of four PUCCH resources based on other OCC indices (e.g., #2). For example, a combination of one of two interleaving indices (e.g., interleaving indices #0 and #1) and one of two CS indices is indicated. OCC index #2 is applied to the remaining four states.

[0239] C. For (RMSI value) index 2 of Table 10, a combination of one of three interleaving indices, one of two CS indices (i.e., 0 and 6), and one of two OCC indices (e.g., indices 0 and 1) is indicated. The starting symbol index is 10. Therefore, 3*2*2=12 states are configured for the PUCCH resource. The remaining four states are used to indicate one of the four PUCCH resources based on other starting symbols (e.g., index 4 or 5). For example, a combination of one of two interleaving indices (e.g., interleaving indices #0 and #1) and one of two CS indices is indicated. If a combination of one of two interleaving indices and one of two CS indices is indicated, OCC index #0 is applied. As another example, a combination of one of two CS indices (i.e., 0 and 6) and one of two OCC indices (e.g., #0 and #1) may be indicated. If a combination of one of two CS indices and one of two OCC indices is indicated, interleaving index #0 is applied.

[0240] D. For the (RMSI value) index 0 of Table 10, a combination of one of three interleaving indices, one of two CS indices (i.e., 0 and 3), and one of two starting symbols (e.g., index 12 and 8 or 9) is indicated. Thus, 3*2*2=12 states are configured for the PUCCH resource. The remaining four states can be used to indicate one of four PUCCH resources based on other starting symbols (e.g., index 4 or 6). For example, a combination of one of two interleaving indices (e.g., interleaving indices #0 and #1) and one of two CS indices is indicated. Starting symbol index #4 or #6 is applied to the remaining four states.

[0241] E. For (RMSI value) index 1 of Table 10, a combination of one of three interleaving indices and one of three CS indices (i.e., 0, 4, and 8) is indicated. Therefore, 3*3=9 states are configured for the PUCCH resource. The remaining 7 states are used to indicate one of the 7 PUCCH resources based on other starting symbols (e.g., index 8 or 9). For example, a combination of one of three interleaving indices (e.g., interleaving indices #0, #1, and #2) and one of three CS indices is indicated, but for a specific interleaving index (e.g., #0), only one CS (e.g., #0) may be used. Two CS indices (e.g., #4 and #8) can be used for two interleaving indices (e.g., #1 and #2) other than the specific interleaving index. Starting symbol index 8 or 9 is applied to the remaining 7 states.

[0242] Proposal 2) will describe Figure 12 All five interleavings are used as the case of option 2.

[0243] A. For (RMSI value) indices 3, 5, and 7 of Table 10, a combination of one of the five interleaving indices and one of the four CS indices (i.e., 0, 3, 6, and 9) is indicated. OCC index #0 is applied. Therefore, 5*4=20 states are configured for PUCCH resources. Since the number of PUCCH resources (r PUCCH ) needs to be 16, so four additional states are excluded from the configuration of PUCCH resources. For example, the combination of one interlace (e.g., interlace index #4) and four CSs is excluded.

[0244] B. For (RMSI value) indices 2, 4, and 6 of Table 10, a combination of one of the five interleaving indices and one of the two CS indices (i.e., 0 and 6) is indicated. OCC index #0 is applied. Therefore, 5*2=10 states are configured for the PUCCH resource. The remaining 6 states are used to indicate one of the 6 PUCCH resources based on other OCC indices (e.g., #1). For example, a combination of one of the three interleaving indices (e.g., interleaving indices #0, #1, and #2) and one of the two CS indices is indicated. OCC index #1 is applied to the remaining 6 states.

[0245] C. For the (RMSI value) index 0 of Table 10, a combination of one of the five interleaving indices and one of the two CS indices (i.e., 0 and 3) is indicated. The starting symbol index 12 is applied. Therefore, 5*2=10 states are configured for the PUCCH resource. The remaining 6 states are used to indicate one of the 6 PUCCH resources based on other starting symbols (e.g., index 8 or 9). For example, a combination of one of the three interleaving indices (e.g., interleaving indices #0, #1, and #2) and one of the two CS indices is indicated. The starting symbol index 8 or 9 is applied to the remaining 6 states.

[0246] D. For the (RMSI value) index 1 of Table 10, a combination of one of the five interleaving indices and one of the three CS indices (i.e., 0, 4, and 8) is indicated. The starting symbol index 12 is applied. Therefore, 5*3=15 states are configured for the PUCCH resource. The remaining state is used to indicate a PUCCH resource based on other starting symbols (e.g., index 8 or 9). For example, a combination of an interleaving index (e.g., interleaving index #0) and a CS (e.g., #0) is indicated. The starting symbol index 8 or 9 is applied to the remaining state.

[0247] Proposal 3) will describe the case of using four interleaving indexes as in Option 3.

[0248] A. For (RMSI value) indices 3, 5, and 7 of Table 10, a combination of one of four interleaving indices and one of four CS indices (ie, 0, 3, 6, and 9) is indicated. OCC index #0 is applied. Therefore, 4*4=16 states are configured for PUCCH resources.

[0249] B. For (RMSI value) indices 2, 4, and 6 of Table 10, a combination of one of four interleaving indices, one of two CS indices (i.e., 0 and 6), and one of two OCC indices (e.g., 0 and 1) is indicated. Therefore, 4*2*2=16 states are configured for PUCCH resources.

[0250] C. For (RMSI value) index 0 of Table 10, a combination of one of four interleaving indices, one of two CS indices (i.e., 0 and 3), and one of two starting symbol indices (e.g., 12 and 8 or 9) is indicated. Therefore, 4*2*2=16 states are configured for PUCCH resources.

[0251] D. For the (RMSI value) index 1 of Table 10, a combination of one of the four interleaving indices and one of the three CS indices (i.e., 0, 4, and 8) is indicated. A starting symbol index of 12 is applied. Thus, 4*3=12 states are configured for the PUCCH resource. The remaining four states are used to indicate one of the four PUCCH resources based on other starting symbols (e.g., index 8 or 9). For example, a combination of one of the four interleaving indices and one CS (e.g., #0) is indicated. A starting symbol index of 8 or 9 is applied to the remaining four states.

[0252] As another method, a PUCCH resource set based on the combination of Table 11 may be included in at least a PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 11 is configured via RMSI signaling, method D or E of proposal 1), method C or D of proposal 2), and / or method C or D of proposal 3) may be applied to indicate a specific PUCCH resource based on the combination in the PUCCH resource set.

[0253] [Table 11]

[0254] PUCCH format First symbol Number of symbols Initial CS index set 0 12 2 {0,3} 0 12 2 {0,4,8}

[0255] As another approach, the PUCCH resource set based on the combination of Table 12 can be included at least in the PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 12 is configured through the RMSI signaling, the method A or C of Proposal 1), the method A or B of Proposal 2), and / or the method A or B of Proposal 3) can be applied to indicate the specific PUCCH resource based on the combination in the PUCCH resource set.

[0256] [Table 12]

[0257] PUCCH format First symbol Number of symbols Initial CS index set 1 10 4 {0,6} 1 10 4 {0,3,6,9}

[0258] As another approach, the PUCCH resource set based on the combination of Table 13 can be included at least in the PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 13 is configured through the RMSI signaling, the method A or B of Proposal 1), the method A or B of Proposal 2), and / or the method A or B of Proposal 3) can be applied to indicate the specific PUCCH resource based on the combination in the PUCCH resource set.

[0259] [Table 13]

[0260] PUCCH format First symbol Number of symbols Initial CS index set 1 4 10 {0,6} 1 4 10 {0,3,6,9}

[0261] As another approach, the PUCCH resource set based on the combination of Table 14 can be included at least in the PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 14 is configured through the RMSI signaling, the method A or B of Proposal 1), the method A or B of Proposal 2), and / or the method A or B of Proposal 3) can be applied to indicate the specific PUCCH resource based on the combination in the PUCCH resource set.

[0262] [Table 14]

[0263] PUCCH format First symbol Number of symbols Initial CS index set 1 0 14 {0,6} 1 0 14 {0,3,6,9}

[0264] Next, according to the above-described method 2, the PUCCH resource set table based on 4-bit RMSI signaling with a cell-specific interlace (index) offset is defined as shown in Table 15. In NR-U, since the UL resource for transmitting PUCCH formats 0 and 1 is changed to one interlace consisting of multiple PRBs instead of one PRB, the PUCCH resource set table based on 4-bit RMSI signaling can be configured by changing the PRB offset of the legacy system to the interlace offset. In the method 2, since the PUCCH resource is indicated by 3-bit PRI, a total of 8 states can be configured for the PUCCH resource in one PUCCH resource set.

[0265] [Table 15]

[0266]

[0267] Based on Table 15, the PUCCH resource set can be configured according to option 3 (in which four interleaving indices are used) among the above options 1 to 3. Specifically, the actual PUCCH interleaving index to be used by the UE can be determined by the sum of the value indicated by the cell-specific interleaving offset (or cell-specific interleaving index offset) described in Proposal 4) or 5) and the value indicated by the interleaving index offset (or UE-specific interleaving index offset). For example, the UE-specific interleaving index offset can be defined as 0 or 1. When the cell-specific interleaving index offset is 0, if the use of two interleaving indices (or two UE-specific interleaving indices) is defined in Proposal 4) or Proposal 5) below, the UE can use interleaving indices #0 and #1. In order to use interleaving indices #0 and #1, the UE-specific interleaving index offset can be indicated as 0 or 1. When the cell-specific interleaving index offset is 2, if the use of two interleaving indices (or two UE-specific interleaving indices) is defined in Proposal 4) or Proposal 5), the UE can use interleaving indices #2 and #3. In order to use interleaving indices #2 and #3, the UE-specific interleaving index offset can be indicated as 0 or 1.

[0268] Proposal 4) will describe the case of using four interleaving indexes as in Option 3 based on Table 15.

[0269] A. For (RMSI values) indices 6, 7, 10, 11, 14, and 15 of Table 15, a combination of one of two interleaving indices (offset 0 or 1) and one of four CS indices (i.e., 0, 3, 6, and 9) is indicated. OCC index #0 is applied. Therefore, 2*4=8 states are configured for PUCCH resources.

[0270] B. For (RMSI value) indices 4, 5, 8, 9, 12, and 13 of Table 15, a combination of one of two interleaving indices (offset 0 or 1), one of two CS indices (i.e., 0 and 6), and one of two OCC indices (e.g., 0 and 1) is indicated. Therefore, 2*2*2=8 states are configured for the PUCCH resource.

[0271] C. For (RMSI value) indices 0 and 1 of Table 15, a combination of one of two interleaving indices (offset 0 or 1), one of two CS indices (i.e., 0 and 3), and one of two starting symbol indices (e.g., 12 and 8 or 9) is indicated. Therefore, 2*2*2=8 states are configured.

[0272] D. For (RMSI value) indexes 2 and 3 of Table 15, a combination of one of two interleaving indices (offset 0 or 1) and one of three CS indices (i.e., 0, 4, and 8) is indicated. The starting symbol index 12 is applied. Therefore, 2*3=6 states are set for the PUCCH resource configuration. Since a total of 8 states need to be configured for the PUCCH resource, the remaining two states are used to indicate one of the two PUCCH resources based on other starting symbols (e.g., index 8 or 9). For example, a combination of one of the two interleaving indices and one CS (e.g., #0) is indicated. The starting symbol index 8 or 9 can be applied to the remaining two states.

[0273] As an additional method, it is possible to consider indicating PUCCH resources by 3-bit PRI + 1-bit CCE based on Table 15. Since PUCCH resources are indicated by a total of four bits, a total of 16 states can be configured for PUCCH resources in one PUCCH resource set. These 16 states can be configured as described in Proposal 5).

[0274] Proposal 5) will describe the case where PUCCH resources are indicated by 3-bit PRI + 1-bit CCE and four interleaving indices are used as in Option 3.

[0275] A. For (RMSI value) indices 6, 7, 10, 11, 14, and 15 of Table 15, a combination of one of two interleaving indices (offset 0 or 1), one of four CS indices (i.e., 0, 3, 6, and 9), and one of two OCC indices (e.g., 0 and 1) is indicated. Therefore, 2*4*2=16 states are configured for the PUCCH resource.

[0276] B. For (RMSI value) indices 8, 9, 12, and 13 of Table 15, a combination of one of two interleaving indices (offset 0 or 1), one of two CS indices (i.e., 0 and 6), and one of four OCC indices (e.g., 0, 1, 2, and 3) is indicated. Therefore, 2*2*4=16 states are configured for the PUCCH resource.

[0277] C. For (RMSI value) indices 4 and 5 of Table 15, a combination of one of two interleaving indices (offset 0 or 1), one of two CS indices (i.e., 0 and 6), one of two OCC indices (e.g., 0 and 1), and one of two starting symbols (e.g., index 10 and one of 4 or 5) is indicated. Therefore, 2*2*2*2=16 states are configured for the PUCCH resource.

[0278] D. For (RMSI value) indices 0 and 1 of Table 15, a combination of one of two interleaving indices (offset 0 or 1), one of two CS indices (i.e., 0 and 3), and one of four starting symbol indices (e.g., 12, 8 or 9, 4 or 6, and 0 or 3) is indicated. Therefore, 2*2*4=16 states are configured for the PUCCH resource.

[0279] E. For (RMSI values) indices 2 and 3 in Table 15, a combination of one of two interleaving indices (offset 0 or 1), one of three CS indices (i.e., 0, 4, and 8), and two starting symbols (e.g., indices 12 and 8 or 9) is indicated. Thus, 2*3*2=12 states are configured for the PUCCH resource. The remaining four states are used to indicate one of four PUCCH resources based on other starting symbols (e.g., indices 4 or 6). For example, a combination of one of two interleaving indices and one of two CS indices (e.g., 0 and 4) is indicated.

[0280] As another method, a PUCCH resource set based on the combination of Table 16 may be included in at least a PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 16 is configured via RMSI signaling, method C or D of proposal 4) and / or method D or E of proposal 5) may be applied to indicate a specific PUCCH resource based on that combination in the PUCCH resource set.

[0281] [Table 16]

[0282]

[0283] As another method, a PUCCH resource set based on the combination of Table 17 may be included in at least a PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 17 is configured via RMSI signaling, method A or B of proposal 4) and / or method A or C of proposal 5) may be applied to indicate a specific PUCCH resource based on that combination in the PUCCH resource set.

[0284] [Table 17]

[0285]

[0286] As another method, a PUCCH resource set based on the combination of Table 18 may be included in at least a PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 18 is configured via RMSI signaling, method A or B of proposal 4) and / or method A or B of proposal 5) may be applied to indicate a specific PUCCH resource based on the combination in the PUCCH resource set.

[0287] [Table 18]

[0288]

[0289] As another method, a PUCCH resource set based on the combination of Table 19 may be included in at least a PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 19 is configured via RMSI signaling, method A or B of proposal 4) and / or method A or B of proposal 5) may be applied to indicate a specific PUCCH resource based on that combination in the PUCCH resource set.

[0290] [Table 19]

[0291]

[0292] Next, according to the above-mentioned method 3, a PUCCH resource set table based on 4-bit RMSI signaling with a cell-specific interlace offset (or cell-specific interlace index offset) added can be defined as shown in Table 20. In NR-U, since the UL resources used to transmit PUCCH formats 0 and 1 are changed to one interlace consisting of multiple PRBs instead of one PRB, the PUCCH resource set table based on 4-bit RMSI signaling can be configured by changing the PRB offset of the legacy system to the interlace offset. In method 3, since PUCCH resources are indicated by a 3-bit PRI + 1-bit CCE, a total of 16 states can be configured for the PUCCH resources in one PUCCH resource set.

[0293] [Table 20]

[0294]

[0295] Based on Table 20, the PUCCH resource set can be configured according to option 3 (in which four interleaving indices are used) among the proposed options. Specifically, the actual PUCCH interleaving index to be used by the UE can be determined by the sum of the value indicated by the cell-specific interleaving offset (or cell-specific interleaving index offset) and the value indicated by the interleaving index offset (or UE-specific interleaving index offset) (to be described in Proposal 6)). For example, the UE-specific interleaving index offset can be defined as 0 or 1. When the cell-specific interleaving index offset is 0, if two interleaving indices (or two UE-specific interleaving indices) are defined as used in Proposal 6 below, the UE can use interleaving indices #0 and #1. In order to use interleaving indices #0 and #1, the UE-specific interleaving index offset can be indicated as 0 or 1. When the cell-specific interleaving index offset is 2, if two interleaving indices (or two UE-specific interleaving indices) are defined as used in Proposal 6), the UE can use interleaving indices #2 and #3. In order to use interleaving indices #2 and #3, the UE-specific interleaving index offset can be indicated as 0 or 1.

[0296] Proposal 6) will describe the case of using four interleaving indexes as in Option 3 based on Table 20.

[0297] A. For (RMSI value) indices 7, 8, 9, 10, 12, 13, 14, and 15 in Table 20, a combination of one of the four CS indices (i.e., 0, 3, 6, and 9) and one of the four OCC indices (e.g., 0, 1, 2, and 3) is indicated. The PUCCH interlace index is determined by the cell-specific interlace offset. For example, when the cell-specific interlace offset is X, the final PUCCH interlace actually allocated to the UE is also the interlace with index X. Therefore, 4*4=16 states are configured for the PUCCH resource.

[0298] B. For (RMSI value) indices 4 and 5 in Table 20, a combination of one of two interleaving indices (offset 0 or 1), one of four CS indices (i.e., 0, 3, 6, and 9), and one of two OCC indices (e.g., 0 and 1) is indicated. Therefore, 2*4*2=16 states are configured for the PUCCH resource. The offset value 0 or 1 used to indicate the two interleaving indices may be indicated by a UE-specific interleaving offset.

[0299] C. For (RMSI value) indices 3, 6, and 11 of Table 20, a combination of one of four interleaving indices, one of two CS indices (i.e., 0 and 6), and one of two OCC indices (e.g., 0 and 1) is indicated. Therefore, 4*2*2=16 states are configured for PUCCH resources.

[0300] D. For (RMSI value) index 0 of Table 20, a combination of one of four interleaving indices, one of two CS indices (i.e., 0 and 3), and one of two starting symbol indices (e.g., 12 and 8 or 9) is indicated. Therefore, 4*2*2=16 states are configured for PUCCH resources.

[0301] E. For (RMIS value) index 1 and 2 of Table 20, a combination of one of two interleaving indices (offset 0 or 1), one of three CS indices (i.e., 0, 4, and 8), and one of two starting symbol indices (e.g., 12 and 8 or 9) is indicated. Thus, 2*3*2=12 states are configured for the PUCCH resource. The remaining four states are used to indicate one of four PUCCH resources based on other starting symbols (e.g., index 4 or 6). For example, a combination of one of two interleaving indices (offset 0 or 1) and one of two CS indices (e.g., #0 and #4) is indicated. Starting symbol index 4 or 6 is applied to the remaining four states. As another example, a combination of three CS indices may be indicated by one interleaving index (e.g., offset 0), and another interleaving index (e.g., offset 1) may use only a specific CS index (e.g., #0).

[0302] As another method, the PUCCH resource set based on the combination of Table 21 may be included in at least the PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 21 is configured through RMSI signaling, method D or E of Proposal 6) may be applied to indicate a specific PUCCH resource based on the combination in the PUCCH resource set.

[0303] [Table 21]

[0304]

[0305] As another method, the PUCCH resource set based on the combination of Table 22 may be included in at least the PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 22 is configured through RMSI signaling, method B or C of proposal 6) may be applied to indicate a specific PUCCH resource based on the combination in the PUCCH resource set.

[0306] [Table 22]

[0307]

[0308] As another method, the PUCCH resource set based on the combination of Table 23 may be included in at least the PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 23 is configured through RMSI signaling, method A or C of proposal 6) may be applied to indicate a specific PUCCH resource based on the combination in the PUCCH resource set.

[0309] [Table 23]

[0310]

[0311] As another method, the PUCCH resource set based on the combination of Table 24 may be included in at least the PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 24 is configured through RMSI signaling, method A or C of proposal 6) may be applied to indicate a specific PUCCH resource based on the combination in the PUCCH resource set.

[0312] [Table 24]

[0313]

[0314] In addition, the following structure can be considered for 3-sector cell deployment. That is, a PUCCH resource set table based on 4-bit RMSI signaling with a cell-specific interleaving offset (or cell-specific interleaving index offset) added can be defined as shown in Table 25. In NR-U, since the UL resources used to transmit PUCCH formats 0 and 1 are changed to one interleaving consisting of multiple PRBs instead of one PRB, the PUCCH resource set table based on 4-bit RMSI signaling can be configured by changing the PRB offset of the traditional system to the interleaving offset. In addition, since the PUCCH resources are indicated by a 3-bit PRI + 1-bit CCE, a total of 16 states can be configured for the PUCCH resources in one PUCCH resource set.

[0315] [Table 25]

[0316]

[0317] Based on Table 25, the PUCCH resource set can be configured according to option 3 (in which four interleaving indices are used) among the proposed options. Specifically, the actual PUCCH interleaving index to be used by the UE can be determined by the sum of the value indicated by the cell-specific interleaving offset (or cell-specific interleaving index offset) and the value indicated by the interleaving index offset (or UE-specific interleaving index offset) (to be described in Proposal 7). For example, the UE-specific interleaving index offset can be defined as 0 or 1. When the cell-specific interleaving index offset is 0, if two interleaving indices (or two UE-specific interleaving indices) are defined as used in Proposal 7 below, the UE can use interleaving indices #0 and #1. In order to use interleaving indices #0 and #1, the UE-specific interleaving index offset can be indicated as 0 or 1. When the cell-specific interleaving index offset is 2, if two interleaving indices (or two UE-specific interleaving indices) are defined as used in Proposal 7), the UE can use interleaving indices #2 and #3. In order to use interleaving indices #2 and #3, the UE-specific interleaving index offset can be indicated as 0 or 1.

[0318] Proposal 7) will describe the case of using four interleaving indexes as in Option 3 based on Table 25.

[0319] A. For the (RMSI value) indices 9, 10, 11, 13, 14, and 15 of Table 25, a combination of one of the four CS indices (i.e., 0, 3, 6, and 9) and one of the four OCC indices (e.g., 0, 1, 2, and 3) is indicated. The PUCCH interlace index is determined by the cell-specific interlace offset. For example, when the cell-specific interlace offset is X, the final PUCCH interlace actually allocated to the UE is also the interlace with index X. Therefore, 4*4=16 states are configured for the PUCCH resource.

[0320] B. For (RMSI value) indices 5, 6, and 7 in Table 25, this indicates a combination of one of four CS indices (i.e., 0, 3, 6, and 9), one of two OCC indices (i.e., 0 and 1), and one of two starting symbol indices (e.g., 10 and 4 or 5). The PUCCH interlace index is determined by the cell-specific interlace offset. For example, when the cell-specific interlace offset is X, the final PUCCH interlace actually allocated to the UE is also the interlace with index X. Therefore, 4*2*2=16 states are configured for the PUCCH resource.

[0321] C. For (RMSI value) indices 4, 8, and 12 of Table 25, a combination of one of four interleaving indices, one of two CS indices (i.e., 0 and 6), and one of two OCC indices (e.g., 0 and 1) is indicated. Therefore, 4*2*2=16 states are configured for PUCCH resources.

[0322] D. For the (RMSI value) indices 0 and 1 in Table 25, a combination of one of two interleaving indices (offset 0 or 1), one of two CS indices (i.e., 0 and 3), and one of four starting symbol indices (e.g., 12, 8, 9, 4, 6, and 0 or 3) is indicated. Thus, 2*2*4=16 states are configured for the PUCCH resource. The offset value 0 or 1 used to indicate the two interleaving indices may be indicated by a UE-specific interleaving offset.

[0323] E. For (RMSI value) indexes 2 and 3 of Table 25, a combination of one of two interleaving indices (offset 0 or 1), one of three CS indices (i.e., 0, 4, and 8), and one of two starting symbol indices (e.g., 12 and 8 or 9) is indicated. Thus, 2*3*2=12 states are configured for the PUCCH resource. The remaining four states are used to indicate one of four PUCCH resources based on other starting symbols (e.g., index 4 or 6). For example, a combination of one of two interleaving indices (offset 0 or 1) and one of two CS indices (e.g., #0, #4) is indicated. Starting symbol index 4 or 6 may be applied to the remaining four states. As another example, a combination of three CS indices may be indicated by one interleaving index (e.g., offset 0), and another interleaving index (e.g., offset 1) may use only a specific CS index (e.g., #0).

[0324] As another method, the PUCCH resource set based on the combination of Table 26 may be included in at least the PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 26 is configured through RMSI signaling, method D or E of Proposal 7) may be applied to indicate a specific PUCCH resource based on the combination in the PUCCH resource set.

[0325] [Table 26]

[0326]

[0327] As another method, the PUCCH resource set based on the combination of Table 27 may be included in at least the PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 27 is configured through RMSI signaling, method B or C of Proposal 7) may be applied to indicate a specific PUCCH resource based on the combination in the PUCCH resource set.

[0328] [Table 27]

[0329]

[0330] As another method, the PUCCH resource set based on the combination of Table 28 may be included in at least the PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 28 is configured through RMSI signaling, method A or C of Proposal 7) may be applied to indicate a specific PUCCH resource based on the combination in the PUCCH resource set.

[0331] [Table 28]

[0332]

[0333] As another method, the PUCCH resource set based on the combination of Table 29 may be included in at least the PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 29 is configured through RMSI signaling, method A or C of Proposal 7) may be applied to indicate a specific PUCCH resource based on the combination in the PUCCH resource set.

[0334] [Table 29]

[0335]

[0336] In addition, the following structure can be considered for 3-sector cell deployment. That is, a PUCCH resource set table based on 4-bit RMSI signaling with a cell-specific interleaving offset (or cell-specific interleaving index offset) added can be defined as shown in Table 30. In NR-U, since the UL resources used to transmit PUCCH formats 0 and 1 are changed to one interleaving consisting of multiple PRBs instead of one PRB, the PUCCH resource set table based on 4-bit RMSI signaling can be configured by changing the PRB offset of the traditional system to the interleaving offset. In addition, since the PUCCH resources are indicated by a 3-bit PRI + 1-bit CCE, a total of 16 states can be configured for the PUCCH resources in one PUCCH resource set.

[0337] [Table 30]

[0338]

[0339] Based on Table 30, the PUCCH resource set can be configured according to option 3 (in which four interleaving indices are used) among the proposed options. Specifically, the actual PUCCH interleaving index to be used by the UE can be determined by the sum of the value indicated by the cell-specific interleaving offset (or cell-specific interleaving index offset) and the value indicated by the interleaving index offset (or UE-specific interleaving index offset) (to be described in Proposal 8). For example, the UE-specific interleaving index offset can be defined as 0 or 1. When the cell-specific interleaving index offset is 0, if two interleaving indices (or two UE-specific interleaving indices) are defined as used in Proposal 8 below, the UE can use interleaving indices #0 and #1. In order to use interleaving indices #0 and #1, the UE-specific interleaving index offset can be indicated as 0 or 1. When the cell-specific interleaving index offset is 2, if two interleaving indices (or two UE-specific interleaving indices) are defined as used in Proposal 8), the UE can use interleaving indices #2 and #3. In order to use interleaving indices #2 and #3, the UE-specific interleaving index offset can be indicated as 0 or 1.

[0340] Proposal 8) will describe the case of using four interleaving indexes as in Option 3 based on Table 30.

[0341] A. For (RMSI value) indices 9, 10, 11, 13, 14, and 15 in Table 30, a combination of one of four CS indices (i.e., 0, 3, 6, and 9) and one of four OCC indices (e.g., 0, 1, 2, and 3) is indicated. The PUCCH interlace index is determined by the cell-specific interlace offset. For example, when the cell-specific interlace offset is X, the final PUCCH interlace actually allocated to the UE is also the interlace with index X. Therefore, 4*4=16 states are configured for the PUCCH resource.

[0342] B. For (RMSI value) indices 5, 6, and 7 in Table 30, a combination of one of four CS indices (i.e., 0, 3, 6, and 9), one of two OCC indices (i.e., 0 and 1), and one of two symbol indices (e.g., 10 and 4 or 5) is indicated. The PUCCH interlace index is determined by the cell-specific interlace offset. For example, when the cell-specific interlace offset is X, the final PUCCH interlace actually allocated to the UE is the interlace with index X. Therefore, 4*2*2=16 states are configured for the PUCCH resource.

[0343] C. For (RMSI value) indices 4, 8, and 12 of Table 30, a combination of one of four interleaving indices, one of two CS indices (i.e., 0 and 6), and one of two OCC indices (e.g., 0 and 1) is indicated. Therefore, 4*2*2=16 states are configured for PUCCH resources.

[0344] D. For (RMSI value) index 0 of Table 30, a combination of one of four interleaving indices, one of two CS indices (i.e., 0 and 3), and one of two starting symbol indices (e.g., 12 and 8 or 9) is indicated. Therefore, 4*2*2=16 states are configured for PUCCH resources.

[0345] E. For (RMSI value) indices 1, 2, and 3 of Table 30, a combination of one of three CS indices (i.e., 0, 4, and 8) and one of five starting symbol indices (e.g., 12, 9, 6, 3, and 0) is indicated. The PUCCH interlace index is determined by the cell-specific interlace offset. For example, if the cell-specific interlace offset is X, the final PUCCH interlace actually allocated to the UE is also the interlace with index X. Therefore, 3*5=15 states are configured for the PUCCH resource. The remaining state is set as a reserved state.

[0346] As another method, the PUCCH resource set based on the combination of Table 31 may be included in at least the PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 31 is configured through RMSI signaling, method D or E of Proposal 8) may be applied to indicate a specific PUCCH resource based on the combination in the PUCCH resource set.

[0347] [Table 31]

[0348]

[0349] As another method, the PUCCH resource set based on the combination of Table 32 may be included in at least the PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 32 is configured through RMSI signaling, method B or C of Proposal 8) may be applied to indicate a specific PUCCH resource based on the combination in the PUCCH resource set.

[0350] [Table 32]

[0351]

[0352] As another method, the PUCCH resource set based on the combination of Table 33 may be included in at least the PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 33 is configured through RMSI signaling, method A or C of Proposal 8) may be applied to indicate a specific PUCCH resource based on the combination in the PUCCH resource set.

[0353] [Table 33]

[0354]

[0355] As another method, the PUCCH resource set based on the combination of Table 34 may be included in at least the PUCCH resource set table based on RMSI signaling. When one of the combinations of Table 34 is configured through RMSI signaling, method A or C of Proposal 8) may be applied to indicate a specific PUCCH resource based on the combination in the PUCCH resource set.

[0356] [Table 34]

[0357]

[0358] 3.2. Implementation Method 2

[0359] Embodiment 2 relates to a method of introducing a new interleaving structure that can meet the OCB requirements in certain situations.

[0360] Specifically, embodiment 2 relates to a method of introducing a new interleaving structure suitable for the initial active UL BWP. For example, if the SCS of CORESET#0 is 30 kHz, the initial active UL BWP is set to 48 PRBs. Each interleaving includes 12 PRBs. The interval between PRBs is determined to be four PRBs (relative to the PRB starting point). In this case, Figure 14 As shown, each of the four interlaces (interlace indexes #0 to #3) consists of 12 PRBs. The frequency band occupied by each interlace is 45 (PRB) * 30 (SCS) * 12 (subcarriers) = 16200 kHz, thus meeting the OCB requirement.

[0361] As another example, if the SCS of CORESET#0 is 15kHz, the initial active UL BWP is set to 96 PRBs. Each interlace includes 12 PRBs. The spacing between PRBs is determined to be 8 PRBs (relative to the PRB start point). In this case, Figure 15 As shown, each of the eight interlaces (interlace indexes #0 to #7) consists of 12 PRBs. The frequency band occupied by each interlace is 89 (PRB)*15 (SCS)*12 (subcarriers)=16020 kHz, thus meeting the OCB requirement.

[0362] In the method proposed above, when a UE operates in an initial active UL BWP, the UE may be configured to use the proposed interleaving structure, where each interleaving comprises 12 RBs, four PRBs for a 30 kHz SCS spacing, or eight PRBs for a 15 kHz SCS spacing. The initial active UL BWP may comprise 48 PRBs for a 30 kHz SCS, or 96 PRBs for a 15 kHz SCS. For example, the UE may perform random access in RRC idle mode and / or RRC connected mode. Additionally or alternatively, the UE may not have established an RRC connection. Additionally or alternatively, the UE may not have established a separate UE-specific UL BWP configuration. An interleaving structure in which each interleaving comprises 12 RBs, four PRBs for a 30 kHz SCS spacing, or eight PRBs for a 15 kHz SCS spacing, may be referred to as interleaving type #1. For example, the UE may use a type #1 interleaving structure for Msg3 PUSCH transmission and / or HARQ-ACK feedback transmission for Msg4 reception.

[0363] When the UE operates in another active UL BWP, the UE may be configured to use an interleaving structure in which each interlace includes 10 (or 11) RBs, five PRBs for a 30 kHz SCS spacing, or 10 PRBs for a 15 kHz SCS spacing. The other active UL BWP may include 51 PRBs for a 30 kHz SCS or 106 PRBs for a 15 kHz SCS. For example, the UE may perform random access in RRC idle mode and / or RRC connected mode. Additionally / alternatively, the UE may not have established an RRC connection. Additionally / alternatively, the UE may not have established a separate UE-specific UL BWP configuration. An interleaving structure in which each interlace consists of 10 (or 11) RBs, five PRBs for a 30 kHz SCS spacing, or 10 PRBs for a 15 kHz SCS spacing may be referred to as interleaving type #2.

[0364] In addition, Msg3 transmission processing can be performed not only by a UE performing initial access but also by a UE in connected mode. Therefore, there may be a case where the UE needs to select one of the proposed interlaces consisting of 12 RBs and 10 RBs. The case where the UE performs the above selection can at least be a contention-free random access (CFRA) case. The BS can indicate which of interlace type #1, in which each interlace consists of 12 RBs, or interlace type #2, in which each interlace consists of 10 RBs, the UE needs to use by indicating an UL grant transmitted on the PUSCH (e.g., Msg3).

[0365] The above-mentioned embodiments 1 and 2 can be applied to the following three situations.

[0366] a. Transmission in the initial active UL BWP corresponding to the CORESET (#0) configured by PBCH / SIB

[0367] b. Transmission in the initial active UL BWP corresponding to the CORESET (#0) configured by RRC signaling other than PBCH / SIB

[0368] c. Transmission in any active UL BWP established by RRC signaling

[0369] 3.3. Implementation Method 3

[0370] Embodiment 3 proposes a new interleaving structure that can be used in other situations.

[0371] In the future, NR U-band operation in a channel bandwidth (BW) of 10 MHz will be considered. Therefore, it is necessary to consider the interleaving structure available in the 10 MHz channel BW. According to Table 7, when the SCS is 30 kHz, the 10 MHz channel BW includes 24 PRBs. When the SCS is 15 kHz, the 10 MHz channel BW includes 52 PRBs. The following describes the new interleaving structure available in this case.

[0372] (1) For 30kHz SCS,

[0373] A. A structure is proposed in which each interlace consists of 12 PRBs, and the interval between PRBs is two PRBs (relative to the starting point). The total number of interlace indices is 2. The frequency band occupied by each interlace is 23 (PRBs) * 30 (SCSs) * 12 (subcarriers) = 8280 kHz, which exceeds 80% of 10 MHz, thus meeting the OCB requirement.

[0374] B. A structure is proposed in which each interlace consists of 8 PRBs and the interval between PRBs is 3 PRBs (relative to the starting point). The total number of interlace indices is 3. The frequency band occupied by each interlace is 22 (PRB) * 30 (SCS) * 12 (subcarriers) = 7920 kHz.

[0375] (2) For 15kHz SCS,

[0376] A. A structure is proposed in which each interlace consists of 10 (or 11) PRBs, and the interval between PRBs is five PRBs (relative to the starting point). The total number of interlace indices is 5. The frequency band occupied by each interlace is 46 (PRBs) * 15 (SCSs) * 12 (subcarriers) = 8280 kHz, which exceeds 80% of 10 MHz, thus meeting the OCB requirement.

[0377] When the SCS is 60 kHz, the BW of 20 MHz consists of 24 PRBs. Thus, the proposed method (1) of Embodiment 3 can be applied as it is.

[0378] 4. Implementation 4 (Indication of UL Signal / Channel Transmission Type)

[0379] Two types of UL channels and / or signals are mainly supported in NR-U (or shared spectrum). One of the two types is a channel and / or signal based on a contiguous mapping method (PRB level) available in a region in which power spectral density (PSD) and occupied channel bandwidth (OCB) requirements need not be satisfied (i.e., used in legacy Rel-15 NR). The other type is a channel and / or signal based on an interleaved mapping method available in a region in which PSD and OCB requirements should be satisfied. The interleaved mapping method can also be referred to as a wideband long sequence and / or frequency domain (F-domain) repetition mapping method. In terms of characteristics, when a BS is installed in one of the two regions and supports NR-U operation, it can be preferable to use the UL channel and / or signal mapping method of the initial configuration as it is. Thus, the following indication methods are proposed.

[0380] [Method 4-1] A method of explicitly indicating all UL signal and / or channel mapping methods supported in the corresponding cell through 1 bit.

[0381] For example, a 1-bit parameter indicating the UL signal and / or channel mapping type can be added to higher layer signaling (e.g., SIB1 or RMSI). When the value of the bit is 0, contiguous mapping (PRB level) used in the legacy Rel-15 NR system is adopted as the UL signal and / or channel mapping type of the corresponding cell. When the value of the bit is 1, interleaved (or wideband long sequence or F-domain repetition) mapping is adopted as the UL signal and / or channel mapping type of the corresponding cell. To communicate with the corresponding cell, the UE transmits UL signals and / or channels using the indicated type according to the bit value. The UE does not expect the indicated mapping type to change while the UE is connected to the cell.

[0382] [Method 4-2] A method of implicitly indicating a method of mapping, among UL signals and / or channels supported in the corresponding cell, remaining UL signals and / or channels except for PRACH (used for an initial access procedure) through a PRACH sequence type.

[0383] For example, when the PRACH preamble related broadcast information transmitted through the higher layer signaling (e.g., SIB1 or RMSI) indicates the PRACH preamble used in the legacy Rel-15 NR system (e.g., in case of the sequence length of 139), the (PRB level) contiguous mapping as used in the legacy Rel-15 NR system is adopted as the UL signal and / or channel mapping type of the corresponding cell. When the PRACH preamble related broadcast information indicates the newly introduced PRACH preamble, the interleaved mapping is adopted as the UL signal and / or channel mapping type of the corresponding cell. For example, the newly introduced PRACH preamble can be a PRACH preamble with a sequence length (e.g., 571 or 1151) much larger than 139, a PRACH preamble repeated in the frequency domain, and / or a PRACH preamble with a repetition number of 2 or more in the frequency domain.

[0384] [Method 4-3] A method of implicitly indicating, through the PUCCH and / or PUSCH mapping type, the remaining UL signal and / or channel among the UL signals and / or channels supported by the corresponding channel, in addition to the PUCCH and / or PUSCH.

[0385] When the PUCCH and / or PUSCH related information transmitted through the higher layer signaling (e.g., SIB1 or RMSI) indicates the (contiguous) PUCCH and / or PUSCH resource mapping used in the legacy Rel-15 NR system, the (PRB level) contiguous mapping (e.g., Rel-15 NR PRACH / PUSCH / PUCCH) as used in the legacy Rel-15 NR system is adopted as the UL signal and / or channel mapping type of the corresponding cell. For example, the PRACH is a single 139-length sequence mapped to 12 PRBs. When the PUCCH and / or PUSCH related information indicates the newly introduced interleaved mapping, the interleaved mapping is adopted as the UL signal and / or channel mapping type of the corresponding cell. For example, a wideband long sequence with a length larger than 139 can be used for the PRACH. Alternatively, for the PRACH, multiple 139-length sequences can be repeated in the frequency domain.

[0386] In the above-described methods, the BS can intentionally indicate additional information to change the UL signal and / or channel mapping type. However, once the BS starts the NR-U operation, there is less likelihood of the need to change the UL signal and / or channel mapping type unless there is a specific reason. Thus, the UE can expect that the information will not change from the initially indicated value.

[0387] In addition, regarding the UL resource mapping type and the LBT subband configuration and / or definition, the following options can be considered.

[0388] In the present specification, when it is said that a DCI format is transmitted, it can mean that the DCI is transmitted in the format.

[0389] 4-1-1) Time 2MHz Occupied Channel Bandwidth (OCB) requirement

[0390] Option 4-1-1-1) When interlace mapping is configured through SIB or RRC signaling, contiguous mapping of at least 2MHz BW can be allowed and / or indicated at a specific point in time (dynamically through DCI). In addition, in a region where OCB requirement needs to be met, contiguous mapping of at least 2MHz BW can be allowed and / or indicated at a specific point in time (dynamically through DCI).

[0391] When contiguous mapping is configured through SIB or RRC signaling, contiguous mapping can be allowed and / or indicated without the constraint on minimum BW. In addition, in a region where OCB requirement needs to be met, contiguous mapping can be allowed and / or indicated without the constraint on minimum BW.

[0392] Option 4-1-1-2) When contiguous mapping is configured through SIB or RRC signaling, whether there is a constraint on minimum BW (e.g., 2MHz) can be configured. In a region where OCB requirement does not need to be met, whether there is a constraint on minimum BW (e.g., 2MHz) can be configured.

[0393] When interlace mapping is configured through SIB or RRC signaling, the operation described in Option 4-1-1-1) can be applied, or contiguous mapping (including minimum 2MHz BW constraint) can not be allowed. In addition, in a region where OCB requirement needs to be met, the operation described in Option 4-1-1-1) can be applied, or contiguous mapping (including minimum 2MHz BW constraint) can not be allowed.

[0394] 4-1-2) UL resource allocation switching

[0395] Option 4-1-2-1) When interlace mapping is configured through SIB or RRC signaling, dynamic switching between interlace mapping and contiguous mapping (through DCI) can be allowed and / or indicated. In addition, in a region where OCB requirement needs to be met, dynamic switching between interlace mapping and contiguous mapping (through DCI) can be allowed and / or indicated.

[0396] When contiguous mapping is configured through SIB or RRC signaling, only contiguous mapping can be allowed and / or indicated without dynamic switching with interlace mapping. In addition, in a region where OCB requirement does not need to be met, only contiguous mapping can be allowed and / or indicated without dynamic switching with interlace mapping.

[0397] When interlace mapping is configured through SIB or RRC signaling, whether only interlace mapping is supported or dynamic switching is supported can be configured later or simultaneously. In addition, in a region where OCB requirement needs to be met, whether only interlace mapping is supported or dynamic switching is supported can be configured.

[0398] Even when dynamic switching is configured, only interlace mapping may be allowed and / or indicated for the UL fallback DCI format as an exception.The UL fallback DCI format may be any DCI format or a DCI format based on the PDCCH Common Search Space (CSS).

[0399] 4-1-3) Default LBT subband

[0400] Option 4-1-3-1) When a specific BWP includes multiple LBT subbands, the UL fallback DCI format corresponding to the BWP can schedule only the PUSCH in a specific single LBT subband. The UL fallback DCI format can be any DCI format or a PDCCH CSS-based DCI format.

[0401] A single LBT subband can be set to the LBT subband with the lowest index. The LBT subband with the lowest index can be replaced with the LBT subband in the lowest frequency and / or the LBT subband with the lowest index in RRC. Alternatively, a single LBT subband can be set to the LBT subband using UL fallback DCI via RRC.

[0402] Option 4-1-3-2) When a specific BWP includes multiple LBT subbands, the UL fallback DCI format corresponding to the BWP can schedule only the PUSCH on a specific set of LBT subbands or only the PUSCH within a specific single LBT subband. The UL fallback DCI format can be any DCI format or a PDCCH CSS-based DCI format.

[0403] An LBT subband set or a single LBT subband can be set to a specific single LBT subband in an LBT subband set or an LBT subband set configured with a PDCCH search space (e.g., CSS) configured with an UL fallback DCI format or carrying an UL fallback DCI format, or configured with a CORESET associated with the search space. The specific single LBT subband can be set to the LBT subband with the lowest index among multiple LBT subbands included in a specific BWP. The LBT subband with the lowest index can be replaced with the LBT subband with the lowest frequency and / or the LBT subband with the lowest index in the RRC. The LBT subband can be referred to as an RB set because the LBT subband includes multiple RBs.

[0404] Option 4-1-3-3) When a specific BWP includes multiple LBT subbands, the UL fallback DCI format corresponding to the BWP can schedule only the PUSCH in a specific single LBT subband among the multiple LBT subbands. The UL fallback DCI format can be any DCI format or a DCI format based on the PDCCH CSS.

[0405] The single LBT subband for scheduling PUSCH may be set to a specific single UL LBT subband among the UL LBT subbands (or the UL RB set corresponding to the UL LBT subband) that overlaps in frequency with the DL LBT subbands mapped to and / or configured with the PDCCH candidates (e.g., CCEs) for transmitting and / or detecting UL fallback DCI formats (or the DL RB set corresponding to the DL LBT subbands). The specific single LBT subband may be the LBT subband with the lowest index among the UL LBT subbands that overlap in frequency with the DL LBT subbands where the CCEs are located. The LBT subband with the lowest index may be replaced with the LBT subband with the lowest frequency and / or the LBT subband with the lowest index in the RRC.

[0406] In characteristics, the CCE aggregation levels (AL) of the two PDCCH candidates, PDCCH candidate #1 and PDCCH candidate #2, that can be used for transmission of the UL fallback DCI format can be set to X and Y, respectively. Y=2X, where X=8 or 16, for example. When X of the total Y CCEs in PDCCH #2 (e.g., X CCEs with a starting index or a lowest index) overlap with the total X CCEs of PDCCH candidate #1 (i.e., the same CCE overlaps), even if the UL fallback DCI format is detected and / or received in PDCCH candidate #1, the UE may still assume and / or consider that the UL fallback DCI format is sent in PDCCH candidate #2. Subsequently, the UE may determine the DL LBT subband and the UL LBT subband that overlaps with the DL LBT subband.

[0407] If there is no UL LBT subband that overlaps with a DL LBT subband mapped to and / or configured with CCEs, the specific single LBT subband may be set to a specific single UL LBT subband in the BWP. The specific single UL LBT subband may be the LBT subband with the lowest index in the BWP. The LBT subband with the lowest index may be replaced with the LBT subband with the lowest frequency and / or the LBT subband with the lowest index in the RRC.

[0408] In another method, a single LBT subband may be set to a specific single UL LBT subband among UL LBT subbands (or UL RB sets) that overlap in frequency with a PDCCH search space (e.g., CSS) configured with a UL fallback DCI format for transmission and / or detection, or a DL LBT subband configured with a CORESET associated with the search space. The specific single LBT subband may be the UL LBT subband with the lowest index. The LBT subband with the lowest index may be replaced with the LBT subband with the lowest frequency and / or the LBT subband with the lowest index in the RRC.

[0409] In the absence of any UL LBT subbands overlapping with the DL LBT subband, a single LBT subband may be set to a specific single UL LBT subband in the BWP. The specific single LBT subband may be the LBT subband with the lowest index. The LBT subband with the lowest index may be replaced with the LBT subband with the lowest frequency and / or the LBT subband with the lowest index in the RRC.

[0410] In addition, a method for determining an RB set for transmitting a Msg.3 PUSCH scheduled by an RAR grant in a Msg.2 PDSCH and / or a method for determining an RB for retransmitting a Msg.3 PUSCH scheduled by a TC-RNTI-based PDCCH may be defined / configured as follows. Msg.2 PDSCH may be scheduled by an RA-RNTI-based PDCCH transmitted in a CSS. A TC-RNTI-based PDCCH may be transmitted in a CSS, and / or a fallback DCI format may be used for a TC-RNTI-based PDCCH.

[0411] 4-2-1) A method for determining an RB set for transmitting a PUSCH scheduled by an RAR grant and / or a method for determining an RB set for transmitting a PUSCH scheduled by a TC-RNTI-based PDCCH.

[0412] 4-2-1-A. When the active BWP includes the initial BWP, the RB set corresponding to the initial BWP in the active BWP is determined for PUSCH scheduling.

[0413] 4-2-1-B. When the active BWP does not include the initial BWP, if a UL RB set exists in the active BWP that overlaps in frequency with the DL RB set for transmitting / receiving RA-RNTI-based PDCCH and / or RAR PDSCH and / or TC-RNTI-based PDCCH, the UL RB set is determined for PUSCH scheduling. In the case of multiple UL RB sets, the UL RB set with the lowest index among the UL RB sets may be determined for PUSCH scheduling. The DL RB set for transmitting / receiving PDCCH may be determined by applying the method proposed in "4-1-3) Default LBT Subband."

[0414] In the absence of any UL RB set in the active BWP that overlaps in frequency with the DL RB set transmitting / receiving RA-RNTI-based PDCCH and / or RAR PDSCH and / or TC-RNTI-based PDCCH, the UL RB set with the lowest index in the active BWP is determined for PUSCH scheduling.

[0415] When defined and / or configured in Embodiment 4, a method for determining an RB set for transmitting a PUSCH scheduled by a C-RNTI, CS-RNTI, and / or MCS-RNTI-based PDCCH may be defined and / or configured as follows. The C-RNTI-based, CS-RNTI-based, and / or MCS-RNTI-based PDCCH may be transmitted in a fallback DCI format.

[0416] 4-3-1) A method for determining a set of RBs for sending PUSCH scheduled by C-RNTI-based, CS-RNTI-based and / or MCS-RNTI-based PDCCH sent in the CSS (hereinafter, "C-RNTI, CS-RNTI and / or MCS-RNTI" may be collectively referred to as "C-RNTI").

[0417] 4-3-1-A. If a UL RB set exists in the active BWP that overlaps in frequency with the DL RB set used to transmit / receive a C-RNTI-based PDCCH, the UL RB set is determined for PUSCH scheduling. If there are multiple corresponding UL RB sets, the UL RB set with the lowest index among the UL RB sets may be determined for PUSCH scheduling. The DL RB set used to transmit / receive a PDCCH may be determined by applying the method proposed in "4-1-3) Default LBT Subband."

[0418] 4-3-1-B. In the event that there is no UL RB set in the active BWP that overlaps in frequency with the DL RB set transmitting / receiving the C-RNTI-based PDCCH, the UL RB set with the lowest index in the active BWP may be determined for PUCH scheduling.

[0419] In addition, a method of determining an RB set for transmitting Msg.3 PUSCH scheduled by an RAR grant in Msg.2 PDSCH and configuration of the RAR UL grant FDRA (Frequency Domain Resource Assignment) field may be defined / configured as follows: Msg.2 PDSCH may be scheduled by an RA-RNTI-based PDCCH transmitted in the CSS.

[0420] 4-4-1) Configuration of the FDRA field in the RAR UL grant

[0421] 4-4-1-A. When UL resource allocation type 2 is allocated, the FDRA field may be configured to include an X-bit portion that schedules (or indicates) an interleaving index and a Y-bit portion that schedules (or indicates) an RB set according to one of the following options. UL resource allocation type 2 may be an interleaved PUSCH / PUCCH transmission scheme.

[0422] Option 4-4-1-A-1) In the L-bit FDRA field, X+Y MSB bits may be used for resource allocation, and the remaining LX-Y LSB bits may be padded with zeros. L may be the total number of bits used for shared spectrum channel access. Specifically, X bits may be padded in the MSB portion, followed by Y bits, and the remaining LSB portion may be padded with zeros.

[0423] Option 4-4-1-A-2) In the L-bit FDRA field, Y+X LSB bits may be used for resource allocation, and the remaining Y L - X MSB bits may be padded with zeros. That is, X bits may be padded in the last LSB portion, preceded by Y bits, and the remaining MSB portion before the Y bits may be padded with zeros.

[0424] 4-4-2) When the FDRA field is configured as described in 4-1-1, a method for determining the RB set used to transmit the Msg.3 PUSCH scheduled by the RAR grant.

[0425] 4-4-2-A. When the active BWP includes the initial BWP, the UE is defined and / or configured not to interpret the Y bits of the FDRA field. The UL RB set corresponding to the initial BWP in the active BWP is determined for Msg.3 PUSCH scheduling.

[0426] 4-4-2-B. When the active BWP does not include the initial BWP, the UE interprets the Y-bit portion of the FDRA field, selects a UL RB set indicated by the Y-bit portion, and determines that the selected UL RB set is used for Msg.3 PUSCH scheduling.

[0427] Option 4-4-2-B-1) The RB set index indicated by the Y bit portion may be set based on the RB set index configured in the active BWP of each UE. The size of the Y bit and the RB set index are configured in a UE-specific manner based on the active BWP.

[0428] When the active BWP for a particular UE is constructed and / or configured with one UL RB set, the UE interprets the Y-bit portion of the FDRA field as zero bits. In other words, the UE ignores the value of the Y-bit portion or interprets the Y-bit portion as not present. A UE that interprets the Y-bit portion of the FDRA field as zero bits always determines that this single UL RB set is used for Msg.3 PUSCH scheduling.

[0429] Option 4-4-2-B-2) Furthermore, the RB set index indicated by the Y bit portion may be configured based on the total RB set configured in the entire carrier (and / or (serving) cell). In other words, the size of the Y bits and the RB set index are configured in a UE-common (i.e., cell-specific) manner across the entire carrier.

[0430] Alternative Option 4-4-2-B-2-1) When the RB set indicated by the Y bit is not included in the RB set configured based on the entire carrier in the active BWP of a specific UE, the UL RB set with the lowest index in the active BWP is determined for Msg.3 PUSCH scheduling.

[0431] Option 4-4-2-B-2-2) When the RB set indicated by the Y bit is not included in the RB set configured based on the entire carrier in the active BWP of a specific UE, the RAR and / or RAR UL grant may be ignored and the Msg.3 PUSCH transmission may be skipped. In other words, the Msg.3 PUSCH may be discarded.

[0432] In addition, a method for determining an RB set for transmitting a PUSCH scheduled by a C-RNTI-based, CS-RNTI-based, and / or MCS-RNTI-based PDCCH sent in a CSS may be defined and / or configured as follows. The C-RNTI-based, CS-RNTI-based, and / or MCS-RNTI-based PDCCH may be sent in a fallback DCI format.

[0433] Another option 4-5-1: The RB set used for PUSCH transmission may be determined as a UL RB set intersecting with the lowest-index CCE of the PDCCH detecting / receiving CSSDCI, or a UL RB set having the lowest index among the UL RB sets.

[0434] Another option 4-5-2: The RB set for PUSCH transmission may be determined as a UL RB set intersecting with the lowest-index PRB, the lowest-index REG, and / or the REG with the lowest-index PRB of the PDCCH detecting / receiving CSSDCI.

[0435] When the portion intersecting the lowest-index PRB, the lowest-index REG, and / or the REG with the lowest-index PRB is an inter-RB set guard band in the ULBWP, the RB set used for PUSCH transmission may be determined as the highest RB set index including PRB indices lower than the guard band or the lowest RB set index including PRB indices higher than the guard band.

[0436] Option 4-5-3: The RB set used for PUSCH transmission can be determined as the UL RB set that intersects with the lowest index PRB, the lowest index REG, and / or the REG with the lowest index PRB in the PDCCH where CSS DCI is detected / received. The CORESET (or any CORESET) configured with DCI transmission in the DL BWP can be configured to not overlap with the inter-RB set guard band in the UL (and / or DL) BWP.

[0437] 5. Implementation 5 (Method for Configuring Interleaving Indexes Using UL Interleaving Structure)

[0438] In the conventional NR system, point A can be set, and the carrier bandwidth can start at a point spaced apart from point A by the indicated value. The point where the carrier bandwidth starts is defined as CRB0. BWP can start at a point spaced apart from CRB0 by the indicated value. When one value is indicated, one BWP is configured. When multiple values ​​are indicated, multiple BWPs are configured. The starting point of each BWP is defined as PRB0. This is shown in Figure 16 middle.

[0439] In the NR-U system, the concept of LBT (Listen Before Talk) subbands is added to the conventional NR system. One or more LBT subbands may be defined in each BWP. When the UL interleaving structure is configured in the LBT subband and each interleaving is indexed, the interleaving index may be configured based on the CRB (or PRB) index. For example, a set of non-contiguous RBs spaced apart from each other by equal intervals of a certain number (e.g., N) of RBs starting from a point spaced apart by a certain number of RBs from CRB (PRB) index 0 may be defined as interleaving index 0. In this way, a set of non-contiguous RBs spaced apart from each other by equal intervals of N RBs starting from a point spaced apart by N RBs from CRB (PRB) index k may be defined as interleaving index k.

[0440] The interleaving index of the first PRB including each BWP and / or each LBT subband (in a specific BWP) may not be set based on the CRB (or PRB) index. This is because the interleaving index to be used for UL transmission may be ambiguously indicated by the ULRA field. For example, for a specific SCS (e.g., 15kHz), the BS may indicate UL transmission resources according to the resource indication value (RIV) scheme. Because the RIV scheme is a resource allocation method based on the assumption that the lowest resource index is mapped to the lowest frequency position in a given frequency band, the RIV scheme may not be able to efficiently allocate interleaving indices (e.g., multiple adjacent interleaving indices) in the case where an interleaving index different from the lowest interleaving index is mapped to the lowest frequency position in a given BWP or LBT subband.

[0441] Therefore, the following method is proposed to solve this problem: UE can identify the starting interlace index Interlace from the RIV indicated by the BS start and interlacing length L Interlaces The interlace index of the first PRB in the LBT subband allocated to the UE may be K. The interlace length is the number of contiguous interlaces.

[0442] The UL interleaving resources that the UE will actually send can be obtained by combining K with Interlace start The interleaving index L corresponding to the value obtained by performing a modulo operation between the value calculated by adding and the interval M between PRBs in one interleaving InterlacesThe starting interlace index for actual transmission is (Interlace start +K)mod M is given.

[0443] Alternatively, the UE may identify the starting interlace index Interlace from the RIV indicated by the BS. start and interlacing length L Interlaces . It can be calculated by {Interlace start ,L Interlaces The UE may set the interleaving index of the first PRB including the allocated LBT subband to K.

[0444] The UL interleaving resources that the UE will actually transmit may be determined as frequency resources corresponding to an interleaving index set corresponding to a result of performing a modulo operation between M and a value calculated by adding K to each indicated interleaving index.

[0445] In a specific example, it can be assumed that for a 15kHz SCS, the UE identifies interleaving index 4 and interleaving length 5 from the RIV indicated by the BS, and the interleaving index including the first PRB in the LBT subband allocated to the UE is 8. In this case, the UL interleaving resources used for UE transmission can be resources corresponding to 5 contiguous interleaving indices starting from index 2 (=(4+8) mod 10). The 5 contiguous interleaving indices including interleaving index 2 can be {2, 3, 4, 6}. This is shown in Figure 17 middle.

[0446] Furthermore, even when the BS allocates resources by indicating individual interlace indices (e.g., by signaling in the form of a special RIV or bitmap), this method can be used in a similar manner. First, the resource allocation information from the BS can indicate N interlace indices to the UE. The N interlace indices can be Interlace0, Interlace1, ..., Interlace n ,…、Interlace N-1 . The interleaving index of the first PRB in the LBT subband allocated to the UE may be referred to as K.

[0447] In this case, the UL interleaving resources used for UE transmission can be the same as those in the interleaving index K. n Interlace n+K is the resource corresponding to the interlace index corresponding to the result of performing a modulo operation between the interval M between PRBs in one interlace. M can be 10 for 15kHz SCS and 5 for 30kHz SCS. The interlace index of the actual transmission resource of the UE is determined by (Interlace n +K)mod M(n=0,…,N-1) is given.

[0448] In a specific example, it can be assumed that for 15kHz SCS, the UE identifies {2,3,4,7,8,9} as the interlace index (i.e., Interlace n ), and the interleaving index including the first PRB in the LBT subband allocated to the UE is 8. In this case, the UL interleaving index resources used for UE transmission may be resources corresponding to (2+8) mod 10=0, (3+8) mod 10=1, (4+8) mod 10=2, (7+8) mod 10=5, (8+8) mod 10=6, and (9+8) mod 10=7. A total of 6 contiguous interleaving indices including interleaving index 0 may be {0, 1, 2, 5, 6, 7}. This is shown in Figure 18 middle.

[0449] Additionally, the following method may be considered together with the method proposed above.

[0450] The CRB index of the first PRB in a given RB set may be defined as The UL interleaved resources for UE transmission may be selected from the Interlace start The value calculated by adding L caused by the interleaving key corresponding to the result of performing a modulo operation between the intervals M between PRBs in one interleaving Interlaces The starting interleaving index of the actual transmission is determined by Given. With L Interlaces The resource corresponding to the interleaving index is the UL interleaving index used for actual transmission of the UE.

[0451] Alternatively, the UE can identify the Interlace from the RIV indicated by the BS start and L Interlaces The indicated interleaving index set can be obtained from {Interlace start ,L Interlaces The CRB index of the first PRB of a given RB set can be defined as

[0452] In this case, the UL interleaving resources used for the actual transmission of the UE may be the same as those obtained by Resources corresponding to an interleaving index set derived by performing a modulo operation between a value calculated by adding each interleaving index in the indicated interleaving index set and M. M may be 10 for a 15 kHz SCS and 5 for a 30 kHz SCS.

[0453] In addition, even when non-contiguous interleaving indices are configured by a bitmap or the like, the UL interleaving resources for actual transmission of the UE may be the same as those in the CRB index of the first PRB of a given RB set. Interlace with each interleaving index n The value calculated by adding The resource corresponding to the interleaving index corresponding to the result of performing a modulo operation between the interval M between PRBs in one interleaving. The interleaving index used for the actual transmission of the UE is given by (n=0, ..., N-1) is given. M can be 10 for 15kHz SCS and 5S for 30kHz SC.

[0454] In addition, since a UE may be allocated one or more (contiguous or non-contiguous) LBT subbands, the method proposed in Embodiment 5 may be used regardless of the number of LBT subbands allocated to the UE by applying the method proposed below.

[0455] Proposed method 5-1-1: When the UE is allocated one or more (contiguous or non-contiguous) LBT subbands by the BS, the interleaving index set X to be actually used is determined based on the interleaving index configuration of the LBT subband located in the lowest frequency band (or having the lowest LBT subband index) among the allocated LBT subbands by configuring / applying the method proposed in embodiment 5. Then, the interleaving index set identical to the set X in each allocated LBT subband can be determined as the actual UL transmission resource.

[0456] In the case of multiple adjacent LBT subbands, the interleaving index in the guard band between the LBT subbands can also be used as UL resources. Therefore, method 5-1-1 can be preferably used based on the first interleaving index of the LBT subband located in the lowest frequency band.

[0457] Proposed method 5-1-2: The interleaving index set X actually to be used is determined based on the interleaving index configuration of the LBT subband located in the lowest frequency band (or having the lowest LBT subband index) in the BWP including (one or more) LBT subbands allocated by the BS to the UE by configuring / applying the method proposed in embodiment 5. Subsequently, the interleaving index set identical to the set X in each LBT subband allocated to the UE can be determined as the actual UL transmission resource.

[0458] The proposed method 5-1-2 may be preferable because the same value is always used in the BWP including a specific LBT subband. In the LBT subband actually allocated to the UE, resources may not be allocated as expected by the BS.

[0459] Proposed method 5-1-2-A: The interleaving index set X to be actually used is determined based on the interleaving index configuration of the LBT subband located in the lowest frequency band (or having the lowest LBT subband index in the BWP) among all LBT subbands belonging to the serving cell of the UE in the carrier bandwidth including the BWP including the LBT subband(s) allocated by the BS to the UE, or the interleaving index configuration of the LBT subband located in the lowest frequency band (or having the lowest LBT subband index in the BWP) by configuring / applying the method proposed in embodiment 5. Subsequently, the interleaving index set identical to the set X in each LBT subband allocated to the UE may be determined as the actual UL transmission resource.

[0460] Proposed method 5-1-3: When the UE is allocated multiple (contiguous or non-contiguous) LBT subbands by the BS, the interleaving index set to be used as actual UL transmission resources can be determined based on the interleaving index configuration of each LBT subband by configuring / applying the various methods proposed in implementation mode 5.

[0461] When a UE is allocated multiple non-contiguous LBT subbands, it is possible to define an intra-carrier guard band between the LBT subbands that is not used. Therefore, it is preferred to apply the various methods proposed in embodiment 5 based on the first interleaving index of each LBT subband.

[0462] The proposed method 5-1-4: When the UE is allocated multiple contiguous LBT subbands by the BS, the proposed 5-1-1 (or 5-1-2) can be applied, and when the UE is allocated multiple non-contiguous LBT subbands by the BS, the proposed 5-1-3 (or 5-1-2) can be applied.

[0463] As described above, when the UE is assigned non-contiguous LBT subbands, it may be preferable to apply the various methods proposed in Embodiment 5 based on the first interleaving index of each LBT subband. When the UE is assigned contiguous LBT subbands, it is preferable to apply the method proposed in Embodiment 5 based on the first interleaving index of the LBT subband located in the lowest frequency band (among the assigned LBT subbands or among all LBT subbands in the BWP including the corresponding LBT subband).

[0464] Proposed method 5-1-5: When a UE is assigned multiple (contiguous or non-contiguous) LBT subbands by the base station, the proposed method 5-1-1 or the proposed method 5-1-2 can be applied to multiple contiguous LBT subbands in the total assigned LBT subband set. The proposed method 5-1-3 (or 5-1-2) can be applied to each non-contiguous LBT subband (or a single LBT subband) assigned to the UE.

[0465] For example, when LBT subbands #0 and #1 and LBT subbands #3 and #4 in a BWP including a total of five LBT subbands are allocated to a UE, an interleaving index is applied to LBT subbands #0 and #1 based on the first interleaving index of LBT subband #0 located in the lower frequency band between LBT subbands #0 and #1. In addition, an interleaving index is applied to LBT subbands #3 and #4 based on the first interleaving index of LBT subband #3 located in the lower frequency band between LBT subbands #3 and #4.

[0466] When the BS allocates resources by indicating each interleaving index through signaling in the form of a bitmap, methods such as the proposed methods 5-1-1 to 5-1-5 (e.g., a method of adding a starting interleaving index and then applying a modulo operation) may not be applied. For example, when the interleaving has the same index mapped to each bit index of the bitmap, the respective interleaving indexes may be directly indicated.

[0467] In addition, the proposed method can be applied to the initial PUCCH resource set in a similar manner. The initial PUCCH resource set in NR-U can be defined as shown in Table 35.

[0468] [Table 35]

[0469]

[0470] The N interlace indices that can be used to configure the initial PUCCH resources can be defined as Interlace0, Interlace1, ..., Interlace n 、...、Interlace N-1 . (Each interleaving index is a value reflecting the starting interleaving offset).

[0471] In addition, the interlace index of the first PRB including the LBT subband allocated to the UE may be defined as K. The UL interlace resource that the UE will use to configure the PUCCH resource may be the same as that in the interlace index K and each interlace index. n Interlace n +K and the interval M between PRBs in one interlace to derive the resources corresponding to the interlace index. The UE will use the UL interlace resources for configuring PUCCH resources to be determined by (Interlace n +K) mod M (n=0, ..., N-1). M can be 10 for 15kHz SCS and 5 for 30kHz SCS.

[0472] In a specific example, for a 30kHz SCS, the UE identifies an interlace index (ie, Interlace 1) that can be used to configure PUCCH resources based on the resource allocation information (eg, initial PUCCH resource set index) indicated by the BS. n ) can be in the order of {2, 3, 4, 0, 1}. It can be assumed that the interleaving index K of the first PRB of the LBT subband allocated to the UE is 3. The order of the interleaving indexes available for PUCCH configuration of the UE can be given as (2+3) mod 5=0, (3+3) mod 5=1, (4+3) mod 5=2, (0+3) mod 5=3, and (1+3) mod 5=4. That is, the UE can configure PUCCH resources in the order of interleaving index 1, 2, 3, and 4 starting from interleaving index 0.

[0473] In addition, the BS may indicate to the UE via the SIB the number of PRBs to be occupied by the initial active UL BWP. When the number of PRBs is not indicated, the number of PRBs to be occupied by the initial active UL BWP may be 48 for 30 kHz and 96 for 15 kHz, because the number of PRBs to be occupied by the initial active UL BWP is equal to the initial active DL BWP. When the BS indicates that the number of PRBs to be occupied by the initial active UL BWP is 50 or greater for a 30 kHz SCS (or 100 or greater for a 15 kHz SCS), the UE may configure PUCCH resources and / or PUCCH resource sets according to the method / order defined in the legacy system, because all interlaces (or interlace indices) meet the OCB requirement.

[0474] When the BS indicates the number of PRBs to be occupied by the initial active UL BWP as less than 50 for 30kHz SCS (or less than 100 for 15kHz SCS) (or the BS does not separately indicate the number of PRBs to be occupied by the initial active UL BWP), additional UE operation needs to be defined because there are interlaces (or interlace indices) that do not meet the OCB requirement. When the number of PRBs to be occupied by the initial active UL BWP is 50-x for 30kHz SCS (or 100-x for 15kHz SCS) (x>0), x interlaces (or interlace indices) do not meet the OCB requirement. Therefore, it may be desirable to exclude x interlaces (or interlace indices) when configuring the PUCCH resource set. When there are a total of N interlace indices and the index of the interlace that includes the first PRB of the LBT subband allocated to the UE is K, the UE may (first) exclude the interlaces corresponding to the last x indices among the interlace indices derived by {K, K+1, ..., K+N-1} mod M. In other words, the interleaving corresponding to the first (Nx) interleaving indices derived by {K, K+1, ..., K+N-1} mod M may be used (first).

[0475] In a specific example, assuming that the BS indicates to the UE through the SIB that the number of PRBs to be occupied by the initial active UL BWP is 48 for a 30kHz SCS (i.e., x=2), and the interlace index K of the first PRB of the LBT subband allocated to the UE is 2 (K=2), the UE may use the interlace index {2, 3, 4} when configuring the PUCCH resource set, excluding the interlace index {0, 1} among the interlace indexes {2, 3, 4, 0, 1}. For example, when index 1 of Table 35 is indicated to the UE, the UE may configure 16 PUCCH resources in the following order (i.e., first CS index, second interlace index, and finally starting symbol).

[0476] Resource 1-1) Starting symbol 12, interleaving index 2, CS index 0

[0477] Resource 1-2) Start symbol 12, interleaving index 2, CS index 4

[0478] Resources 1-3) Start symbol 12, interleaving index 2, CS index 8

[0479] Resources 1-4) Start symbol 12, interleaving index 3, CS index 0

[0480] Resources 1-5) Start symbol 12, interleaving index 3, CS index 4

[0481] Resources 1-6) Start symbol 12, interleaving index 3, CS index 8

[0482] Resources 1-7) Start symbol 12, interleaving index 4, CS index 0

[0483] Resource 1-8) Starting symbol 12, Interlace index 4, CS index 4

[0484] Resource 1-9) Starting symbol 12, Interlace index 4, CS index 8

[0485] Resource 1-10) Starting symbol 9, Interlace index 2, CS index 0

[0486] Resource 1-11) Starting symbol 9, Interlace index 2, CS index 4

[0487] Resource 1-12) Starting symbol 9, Interlace index 2, CS index 8

[0488] Resource 1-13) Starting symbol 9, Interlace index 3, CS index 0

[0489] Resource 1-14) Starting symbol 9, Interlace index 3, CS index 4

[0490] Resource 1-15) Starting symbol 9, Interlace index 3, CS index 8

[0491] Resource 1-16) Starting symbol 9, Interlace index 4, CS index 0

[0492] In another example, assume that the BS indicates the number of PRBs to be occupied by the initial active UL BWP as in the previous example, 48 for 30 kHz SCS (i.e., x = 2), and the index K of the interlace including the first PRB of the LBT subband allocated to the UE is 2 (K = 2), the UE can use the interlace indices {2, 3, 4} when configuring the PUCCH resource set, excluding the interlace indices {0, 1} among the interlace indices {2, 3, 4, 0, 1}. Then, when index 11 of Table 35 is indicated to the UE, the UE can configure the PUCCH resources in the following order (i.e., first CS index, second interlace index, and last OCC index). When the interlace indices not satisfying the OCB requirement are completely excluded from the PUCCH resources, the number of PUCCH resources does not reach 16.

[0493] Resource 2-1) OCC index 0, Interlace index 2, CS index 0

[0494] Resource 2-2) OCC index 0, Interlace index 2, CS index 6

[0495] Resource 2-3) OCC index 0, Interlace index 3, CS index 0

[0496] Resource 2-4) OCC index 0, Interlace index 3, CS index 6

[0497] Resource 2-5) OCC index 0, Interlace index 4, CS index 0

[0498] Resources 2-6) OCC index 0, interleaving index 4, CS index 6

[0499] Resource 2-7) OCC index 1, interleaving index 2, CS index 0

[0500] Resource 2-8) OCC index 1, interleaving index 2, CS index 6

[0501] Resource 2-9) OCC index 1, interleaving index 3, CS index 0

[0502] Resource 2-10) OCC index 1, interleaving index 3, CS index 6

[0503] Resource 2-11) OCC index 1, interleaving index 4, CS index 0

[0504] Resource 2-12) OCC index 1, interleaving index 4, CS index 6

[0505] Resources 2-13)…

[0506] Resources 2-14)…

[0507] Resources 2-15)…

[0508] Resources 2-16)…

[0509] When, similar to resources 2-13) to 2-16, 16 PUCCH resources are not configured because the interleaving index required by OCB is not met, the following method can be applied.

[0510] Method 5-2-1: The UE configures as many PUCCH resources as possible in the defined resources according to the defined method, and when the number of configured resources is less than 16, no more PUCCH resources are generated.

[0511] Method 5-2-1 reduces the number of PUCCH resources, although the benefit of additional UE operation is no longer required.

[0512] Method 5-2-2: The UE configures as many PUCCH resources as possible in the defined resources according to the defined method, and when the number of configured resources is less than 16, returns to the initial resources and configures additional PUCCH resources (in overlapping resources).

[0513] Although the number of PUCCH resources can be matched, method 5-2-2 may cause overlapping problems between different PUCCH resources.

[0514] Method 5-2-3: The UE configures as many PUCCH resources as possible according to the defined method in the defined resources, and when the number of configured resources is less than 16, configures the remaining PUCCH resources according to the method of using the interleaving indices not satisfying the OCB requirement additionally according to the defined method.

[0515] The UE configures as many PUCCH resources as possible by placing the interleaving indices satisfying the OCB requirement first, and configures the remaining PUCCH resources with the interleaving indices not satisfying the OCB requirement. According to Method 5-2-3, although there can be PUCCH resources not satisfying the OCB requirement, the overlapping problem between different PUCCH resources can be solved.

[0516] In the method proposed in Embodiment 5, the number of contiguous interleaving indices among the interleaving indices corresponding to the UL resources to be transmitted by the UE is denoted by L. Then, for the PAPR / CM performance of the UE, it can be desirable to perform UL transmission by grouping L contiguous PRBs into a PRB group. Using a PRB group including less than L contiguous PRBs together with a PRB group including L PRBs in transmission can degrade the PAPR / CM performance.

[0517] For example, assume that for 15 kHz SCS, the number of PRBs corresponding to a certain LBT subband is 106 (PRB index 0 to PRB index 105) and the first interleaving index of the certain LBT subband is 0. Also assume that the BS allocates 5 contiguous interleavings starting from interleaving index 3 to the UE. Then, the UL resources actually available for the UE to perform UL transmission are shown in Figure 19 .

[0518] Referring to Figure 10 , it can be noted that the first 5 contiguous PRBs occur 10 times, while 3 contiguous PRBs occur at the 11th time. When the UE performs UL transmission in the UL resources configured as shown in Figure 10 , the UE can experience degradation in PAPR / CM performance.

[0519] Therefore, to avoid such a problem, in addition to the PRB groups each including L contiguous PRBs among the allocated UL resources, the UE can puncture or rate match the PRB groups each including less than L PRBs so as not to use them in transmission. Since L is 5 in the example of Figure 10 , the UE can not use the 11th PRB group (i.e., the PRB group including 3 PRBs) including less than 5 PRBs in transmission. For L = 1, there is no PRB group including less than 1 PRB, so the method of not using a certain PRB group can not be applied. Also, although the method is always applicable regardless of the waveform, it can be applied only in the case of transmission of the DFT-s-OFDM waveform.

[0520] When interleaving is indexed based on CRB0, the method proposed in Embodiment 5 also applies. Furthermore, when interleaving is indexed based on PRB0, the starting point of each BWP, the method proposed in Embodiment 5 also applies. The reason for reconfiguring the interleaving index based on PRB0, the starting point of each BWP, is that, when there are multiple BWPs, the interleaving index including PRB0 in each BWP may be defined differently, so the UE needs to perform the above operation separately for each BWP. To reduce the burden on the UE, the interleaving can be reindexed so that interleaving index 0 starts in PRB0 in each BWP.

[0521] In addition, when DFT-s-OFDM waveform transmission is configured for PUSCH transmission, the UE transmits PUSCH in an interleaving structure existing on one or more LBT subbands, and the number of PRBs included in the interleaving existing on one or more LBT subbands is not a size that can be used for DFT (i.e., a multiple of 2 and / or 3 and / or 5), the UE may not be able to determine the number of PRBs on which DFT is to be performed in DFT-s-OFDM PUSCH transmission. To solve this problem, the following method is proposed.

[0522] Proposed method 5-3-1: When the BS instructs the UE to use a DFT-s-OFDM waveform in PUSCH transmission, the UE may be configured not to use resources in an intra-carrier guard band between multiple adjacent LBT subbands.

[0523] For example, there may be N-1 (e.g., 2) intra-carrier guard bands between N (e.g., N=3) adjacent LBT subbands, and the PRBs included in the guard bands are also applicable to PUSCH transmission. However, when the UE is instructed to use a DFT-s-OFDM waveform in PUSCH transmission, the UE may be defined / configured not to transmit PUSCH in the PRBs present in the intra-carrier guard bands.

[0524] In addition, it can be configured that in the interlace of each LBT subband, only 10 PRBs except the lowest (or highest) one PRB in the interlace including 11 PRBs are used in PUSCH transmission.

[0525] For example, 10 or 11 PRBs may be configured for each interlace index in a specific LBT subband. For an interlace including 11 PRBs, it may be defined / configured to use only 10 PRBs of the interlace in PUSCH transmission.

[0526] Proposed method 5-3-2: When the BS instructs the UE to use a DFT-s-OFDM waveform for PUSCH transmission, the UE may determine the number of PRBs used for PUSCH transmission in the following two steps.

[0527] Step 0: When the total number of PRBs in the corresponding interlace is a multiple of 2 and / or 3 and / or 5, the UE can transmit PUSCH in all RPBs. Otherwise, the UE proceeds to Step 1.

[0528] Step 1: For each of one or more LBT subbands allocated to the UE by the BS, the UE can determine the number of PRBs included in the respective interlace and perform PUSCH transmission using only 10 PRBs out of 11 PRBs in the LBT subband except for the lowest (or highest) one PRB in the frequency domain.

[0529] Then, when the total number of PRBs in the remaining resources in the interlace except for the excluded PRB is a multiple of 2 and / or 3 and / or 5, the UE can transmit PUSCH in all PRBs. Otherwise, the UE proceeds to Step 2.

[0530] Step 2: Regarding the PRBs included in the interlace in the in-carrier guard band between adjacent LBT subbands among one or more LBT subbands allocated to the UE by the BS, the UE excludes one PRB from the PUSCH transmission resources based on the lowest (or highest) CRB (or PRB) index or the lowest (or highest) frequency band.

[0531] After this operation, when the total number of PRBs in the remaining resources in the interlace except for the excluded PRB is a multiple of 2 and / or 3 and / or 5, the UE transmits PUSCH in all PRBs. Otherwise, the UE repeats Step 2 until there are no more PRBs of the interlace in the in-carrier guard band.

[0532] Proposed method 5-3-3:

[0533] 5-3-3-A. When the BS configures / indicates the CP-OFDM waveform for PUSCH transmission, the following operations can be performed.

[0534] An interlace index including any number (e.g., 9, 10, 11, etc.) of PRBs in an LBT subband can be allocated. When adjacent LBT subbands are allocated, PRBs belonging to the guard band between LBT subbands can also be used.

[0535] 5-3-3-B. When the BS configures / indicates the DFT-s-OFDM waveform for PUSCH transmission, the following operations can be performed.

[0536] An interlace index including a specific (same) number of RBs (e.g., 10 RBs (or 9 RBs), etc.) can be allocated. Even if adjacent LBT subbands are allocated, PRBs belonging to the guard band between LBT subbands are not used.

[0537] Proposed method 5-3-4:

[0538] 5-3-4-A. When the BS configures / indicates a CP-OFDM waveform for PUSCH transmission, the configuration indicates the UL resource (interlace) allocation (for 15K SCS and for 30K SCS) via a bitmap in the UL grant DCI.

[0539] 5-3-4-B, when the BS configures / indicates a DFT-s-OFDM waveform for PUSCH transmission, the configuration indicates the UL resource (interlace) allocation via RIV in the UL grant DCI (for 15K SCS and for 30K SCS via a bitmap).

[0540] The proposed method 5-3-5:

[0541] 5-3-5-A. The method is as follows: when a UE is assigned one or more interleaving indices on one or more RB sets (or LBT subbands), the total number of PRBs for each interleaving index is calculated, and for each interleaving index, the PRBs are discarded in descending (or ascending) order of the CRB (or PRB) index, in descending (or ascending) order of the frequency band, alternately between the lowest CRB (or PRB) index and the highest CRB (or PRB) index, or alternately between the lowest frequency band and the highest frequency band, so that the number of PRBs is equal to or less than the total number of RPBs and is a multiple of a maximum specific number K (for example, K = 10).

[0542] In addition, the total number of PRBs including the PRBs in the inner guard band (or the guard band between LBT subbands) of each allocated interleaving index can be calculated. Alternatively, the total number of PRBs other than the PRBs in the inner guard band can be calculated for each allocated interleaving index.

[0543] 5-3-5-B. Alternatively, when a UE is allocated one or more interleaving indices on one or more RB sets, the UE calculates the total number of PRBs for the total allocated interleaving indices. The UE may then discard some of the total allocated PUSCH resources so that the number of resources to be used for PUSCH transmission is a maximum specific number that is less than or equal to the total number of RPBs. The specific number may be a multiple of K. For example, K may be 2 and / or 3 and / or 5. The specific number of PRBs used for PUSCH transmission is a multiple of 2, 3, and / or 5, because otherwise DFT problems may occur. The PUSCH resources to be discarded may be selected in descending (or ascending) order of CRB (or PRB) indices or in descending (or ascending) order of frequency bands. Alternatively, the PUSCH resources to be discarded may be selected alternately between the lowest CRN (or PRB) index and the highest CRB (or PRB) index. Alternatively, the PUSCH resources to be discarded may be selected alternately between the lowest frequency band and the highest frequency band.

[0544] Additionally, the total number of PRBs including PRBs in the inner guard band can be calculated for the total allocated interlace index. Alternatively, the total number of PRBs excluding PRBs in the inner guard band can be calculated for the total allocated interlace index.

[0545] The proposed method 5-3-6:

[0546] When the UE is allocated one or more interlace indices on one or more RB sets (or LBT subbands) as PUSCH transmission resources, the UE calculates the total number of PRBs for the total allocated interlace indices and discards PRBs of each interlace index by the proposed method below so that the number of PUSCH transmission resources becomes a multiple of a specific number K (2 and / or 3 and / or 5).

[0547] 5-3-6-A. For each interlace index, the position of the PRB and the position of the RB set can be determined in the following manner.

[0548] Specifically, when the RB set corresponding to the lowest (or highest) band among the allocated RB sets includes the RB set including a specific interlace index having 11 PRBs, the UE selects the RB set for each interlace index. When the selected RB set has the lowest (or highest) index (or is located in the lowest (or highest) band), the UE is configured to start discarding PRBs corresponding to the lowest (or highest) CRB (or PRB) index in the RB set.

[0549] Subsequently, when the UE should discard additional PRBs in the same interlace, the UE sequentially discards PRBs starting from the PRB corresponding to the lowest (highest) CRB (or PRB) index next to the discarded RPB. The RB set in which the discarded RPB is located has the lowest (or highest) index. Alternatively, the RB set in which the discarded RPB is located resides in the lowest (or highest) band.

[0550] In the case where the RB set including a specific interlace index (e.g., j) having 11 PRBs does not exist in the RB set corresponding to the lowest (or highest) band among the allocated RB sets, the UE first discards another interlace index. Subsequently, in the case where the RB set including another interlace index (e.g., k) having the discarded PRB exists, the RB set selected by the interlace index (e.g., k) is selected by the specific interlace (e.g., j). Alternatively, when a plurality of other interlace indices exist, the RB set is selected in ascending (or descending) order of the band. Accordingly, PRBs are discarded from the PRB corresponding to the lowest (or highest) CRB (or PRB) index in the specific interlace index (e.g., j) according to the discarded PRB in the interlace index (e.g., j).

[0551] Then, when additional PRBs should be dropped for the same interlace index (e.g., j), the PRBs are sequentially dropped starting with the PRB corresponding to the lowest (or highest) CRB (or PRB) index next to the previously dropped PRB. The RB set in which the dropped PRBs are located has the lowest (or highest) index. Alternatively, the RB set in which the dropped PRBs are located resides in the lowest (or highest) frequency band.

[0552] When there is no RB set including an interleaving index having 11 PRBs among the RB sets corresponding to the lowest (or highest) frequency band among the allocated RB sets, the UE selects the RB set corresponding to the lowest (or highest) index (according to any method or predetermined method) and starts dropping PRBs starting from the PRB corresponding to the lowest (or highest) CRB (or PRB) index. Alternatively, the UE selects an RB set located in the lowest (or highest) frequency band and starts dropping PRBs starting from the PRB corresponding to the lowest (or highest) CRB (or PRB) index.

[0553] Subsequently, when additional PRBs should be dropped in the same interlace, the PRBs are dropped sequentially, starting with the PRB corresponding to the lowest (or highest) CRB (or PRB) index next to the previously dropped PRB. The RB set in which the dropped PRBs are located has the lowest (or highest) index. Alternatively, the RB set in which the dropped PRBs are located resides in the lowest (or highest) frequency band.

[0554] Figure 20 is a diagram showing Example 1 (Example 5-3-6-A-1) according to the proposed method 5-3-6-A.

[0555] exist Figure 20 In the example, we assume that K=10.

[0556] Reference Figure 20 , the BS allocates interleaving index #0 and interleaving index #4 in RB set #0 and RB set #1 to the UE as resources for DFT-s-OFDM-based PUSCH transmission.

[0557] Interleaving index #0 includes a total of 21 PRBs in the allocated RB set. Therefore, 1 PRB should be dropped (to match K*2=20). The UE then selects RB set #0, which includes 11 PRBs, from between the highest (or lowest) RB set, RB set #0, and RB set #1, and drops the PRB corresponding to the lowest PRB (or CRB) index, PRB index #0 (i.e., CRB index 5) in RB set #0. Therefore, the total number of PRBs corresponding to interleaving index #0 is 20, and dropping stops.

[0558] Interleaving index #4 includes a total of 21 PRBs in the allocated RB set. Therefore, 1 PRB should be dropped (to match K*2=20). The UE then selects RB set #1, which includes 11 PRBs, from between the highest or lowest RB set, RB set #0 and RB set #1, and drops the PRB corresponding to the highest PRB (or CRB) index, PRB index #50 (i.e., CRB index 109) in RB set #1. Therefore, the total number of PRBs corresponding to interleaving index #4 is 20, and dropping stops.

[0559] Finally, the number of PRBs corresponding to each interleaving index is 20. Since there are two interleaving indexes in total, 40 (=4*10=23×5) PRBs are used as resources for DFD-s-OFDM-based PUSCH transmission.

[0560] Reference Figure 21 , the number of PRB groups (equal to the total number of allocated interlaces) is equal to 2, and the spacing between PRB groups is equal to 3 PRBs.

[0561] Figure 22 is a diagram showing Example 2 (Example 5-3-6-A-2) according to the proposed method 5-3-6-A.

[0562] exist Figure 22 In the example, we assume that K=10.

[0563] Reference Figure 22 , the BS allocates interleaving index #0, interleaving index #1, and interleaving index #4 in RB set #0, RB set #1, and RB set #2 to the UE as resources for DFT-s-OFDM-based PUSCH transmission.

[0564] Assuming that the PRBs of the inner guard band are included in the PUSCH transmission, interlace index #0 includes a total of 32 PRBs. 2 PRBs should be dropped (to match K*3=30). Therefore, the UE selects RB set #0, which includes 11 PRBs, from between the highest or lowest RB set, RB set #0 and RB set #2, and drops the PRB corresponding to the lowest PRB (or CRB) index, PRB index #0 (i.e., CRB index 5) in RB set #0.

[0565] Interleaving index #0 still includes 31 PRBs. The UE again selects the same RB set as the RB set including the previously discarded RRB, RB set #0, and discards the PRB corresponding to interleaving index #0 (which has not yet been discarded) and the PRB corresponding to the lowest PRB (or CRB) index in RB set #0, PRB index #5 (i.e., CRB index 10).

[0566] Then, the total number of PRBs corresponding to interleaving index #0 is 30, and dropping is stopped.

[0567] Interleaving index #1 includes a total of 32 PRBs. 2 PRBs should be dropped (to match K*3=30). Therefore, even if the UE intends to select an RB set including 11 PRBs from between the highest or lowest RB set, RB set #0 and RB set #2, each of the two RB sets only includes 10 PRBs. Therefore, the UE selects the same RB set in interleaving index #0 as the RB set from which the PRBs have been dropped, RB set #0, and drops the PRB corresponding to the lowest PRB (or CRB) index, PRB index #1 (i.e., CRB index 6) in RB set #0.

[0568] Interleaving index #1 still includes 31 PRBs. The UE again selects the same RB set as the RB set that includes the previously discarded RRB, RB set #0, and discards the PRB corresponding to the lowest PRB (or CRB) index, PRB index #6 (i.e., CRB index 11), among the PRBs corresponding to interleaving index #1 in RB set #0 (which have not yet been discarded). The total number of PRBs corresponding to interleaving index #1 is then 30, and no more PRBs are discarded.

[0569] Interleaving index #4 includes a total of 31 PRBs. 1 PRB should be dropped (to match K*3=30). Therefore, even if the UE intends to select an RB set including 11 PRBs from between the highest or lowest RB set, RB set #0 and RB set #2, each of the two RB sets only includes 10 PRBs. Therefore, the UE selects the same RB set as the RB set from which the PRBs in interleaving index #0 have been dropped, RB set #0, and drops the PRB corresponding to the lowest PRB (or CRB) index, PRB index #4 (i.e., CRB index 9) in RB set #0. Then, the total number of PRBs corresponding to interleaving index #4 is 30, and no more PRBs are dropped.

[0570] Finally, the number of PRBs corresponding to each interleaving index is 30. Since there are three interleaving indices in total, 90 (=9*10=32×2×5) PRBs are used as resources for PUSCH transmission based on DFD-s-OFDM, as shown in FIG. Figure 23 shown.

[0571] Reference Figure 23 , the number of PRB groups (equal to the total number of allocated interlaces) is equal to 3, and the spacing between PRB groups is equal to 2 PRBs.

[0572] Additionally, the UE can calculate the total number of PRBs including PRBs in inner guard bands (or guard bands between LBT subbands) for each allocated interlace index. Alternatively, the UE can calculate the total number of PRBs excluding PRBs in inner guard bands.

[0573] 5-3-6-B. Alternatively, when the UE is allocated one or more interlace indices on one or more RB sets, the UE calculates the total number of PRBs of the total interlace indices. Then, the UE can drop PRBs in the total (allocated) PUSCH resources in such a way that the number of PUSCH resources is a multiple of 2, 3, and / or 5 as proposed below.

[0574] The location of PRBs to be dropped and the location of RB sets can be determined in the following way.

[0575] In particular, the UE is configured to select an RB set including 11*x+10*y PRBs corresponding to the lowest (or highest) band and start dropping PRBs in the selected RB set corresponding to the lowest (or highest) CRB (or PRB) index when the selected RB set has the lowest (or highest) index among the allocated RB sets (or resides in the lowest (or highest) band). When multiple RB sets are selected, one RB set corresponding to the lowest (or highest) index (or band) is selected according to any or predetermined information. Herein, x>0, y>=0, and x+y is the total number of interlace indices allocated to the UE.

[0576] When PRBs are to be additionally dropped in the same RB set, PRBs corresponding to the lowest (or highest) CRB (or PRB) index next to the previously dropped PRB are sequentially dropped. The RB set in which the dropped PRB resides has the lowest (or highest) index. Alternatively, the RB set in which the dropped PRB resides resides in the lowest (or highest) band.

[0577] In case that there is no RB set including 11*x+10*y PRBs corresponding to the lowest (or highest) band among the RB sets allocated to the UE, the UE is configured to select one RB set corresponding to the lowest (or highest) index (or residing in the lowest (or highest) band) (according to any or predetermined information) and start dropping PRBs in the selected RB set corresponding to the lowest (or highest) CRB (or PRB) index.

[0578] When PRBs are to be additionally dropped in the same RB set, PRBs corresponding to the lowest (or highest) CRB (or PRB) index next to the previously dropped PRB are sequentially dropped. The RB set in which the dropped PRB resides has the lowest (or highest) index. Alternatively, the RB set in which the dropped PRB resides resides in the lowest (or highest) band.

[0579] Figure 24 is a diagram showing Example 1 (Example 5-3-6-B-1) according to the proposed method 5-3-6-B.

[0580] exist Figure 24 In the example, we assume that K=10.

[0581] Reference Figure 24 , the BS allocates interleaving index #0 and interleaving index #4 in RB set #0 and RB set #1 to the UE as resources for DFT-s-OFDM-based PUSCH transmission.

[0582] Since the number of PRBs corresponding to the total interleaving index is 42, 2 PRBs should be dropped (to match K*4=40). Therefore, the UE should select an RB set with 11*x+10*y PRBs from between RB set #0 and RB set #1, which are the highest or lowest RB sets. Since each of the two RB sets has 21 PRBs, the UE (arbitrarily) selects RB set #0, which is the lowest RB set. The UE then drops the PRBs in RB set #0 corresponding to PRB index #0 (i.e., CRB index 5), which is the lowest PRB (or CRB) index.

[0583] Subsequently, since the number of PRBs corresponding to the total interleaving index is 41, the UE again selects RB set #0, which is the same RB set as the RB set to which the previously discarded PRB belongs, and discards the PRB in RB set #0 corresponding to PRB index #4 (i.e., CRB index 9), which is the lowest PRB (or CRB) index (not yet discarded).

[0584] Then, the number of PRBs corresponding to the total interleaving index becomes 40, and PRBs are no longer dropped.

[0585] Finally, the number of PRBs corresponding to the interleaving index becomes 40. Figure 25 As shown, 40 (=4*10=23×5) PRBs are used as resources for PUSCH transmission based on DFD-s-OFDM.

[0586] Reference Figure 25 , the spacing between PRB groups (the number of PRB groups is equal to the total number of allocated interlaces) is equal to 3. However, the number of PRB groups is 1 or 2. Therefore, in this case, it may be desirable to apply the proposed method 5-3-5-A.

[0587] Figure 26 is a diagram showing Example 2 (Example 5-3-6-B-2) according to the proposed method 5-3-6-B.

[0588] exist Figure 26 In the example, we assume that K=10.

[0589] Reference Figure 26 , the BS allocates interleaving indexes #0, #1, and #4 in RB set #0, RB set #1, and RB set #2 to the UE as resources for DFT-s-OFDM-based PUSCH transmission.

[0590] Assuming that the PRBs in the inner guard band are also included in the PUSCH transmission, the total number of PRBs corresponding to the three interleaving indices is 95 = (32 + 32 + 31). Therefore, 5 PRBs should be dropped (to match K*9 = 90). Therefore, the UE can select RB set #0 with 11*x + 10*y PRBs (31 = 11*1 + 10*2) from between RB set #0 and RB set #2, which are the highest or lowest RB sets. The UE then drops the PRB corresponding to PRB index #0 (i.e., CRB index 5), which is the lowest PRB (or CRB) index, in the selected RB set #0.

[0591] Subsequently, since the number of PRBs corresponding to the total interleaving index is 94, the UE again selects RB set #0, which is the same RB set as the RB set to which the previously discarded PRB belongs, and discards the PRB corresponding to PRB index #1 (i.e., CRB index 6) which is the lowest PRB (or CRB) index (not yet discarded) in the selected RB set #0.

[0592] The UE repeats the above process three more times to additionally drop three PRBs corresponding to PRB indices #4, #5, and #6 (ie, CRB indices 9, #10, and #11) in the selected RB set #0.

[0593] Then, the number of PRBs corresponding to the total interleaving index becomes 90, and PRBs are no longer dropped.

[0594] Finally, since the number of PRBs corresponding to the total interleaving index is 90, 90 (=9*10=32×2×5) PRBs are used as resources for PUSCH transmission based on DFD-s-OFDM, as shown in FIG. Figure 27 shown.

[0595] Reference Figure 27 , the number of PRB groups (i.e., equal to the total number of allocated interlaces) is equal to 3, and the number of PRBs between PRB groups is equal to 2.

[0596] In addition, the UE may calculate the total number of PRBs including even the PRBs of the inner guard band for the total allocated interleaving index, or calculate the total number of PRBs excluding the PRBs of the inner guard band for the total allocated interleaving index.

[0597] Proposed method 5-3-7:

[0598] Case 5-3-7-1: When the UE is allocated one or more RB sets, the UE calculates the total number of PRBs for the total allocated UL resources (i.e., considering all RB sets and interleaving indices), and then when the total number of PRBs is a multiple of 2 and / or 3 and / or 5, the UE sends PUSCH in the corresponding UL resources.

[0599] Case 5-3-7-2: When the total number of PRBs of all UL resources allocated to the UE is not a multiple of 2 and / or 3 and / or 5, the UE sequentially performs the following PRB discarding method until the total number of PRBs of all allocated UL resources is a multiple of 2 and / or 3 and / or 5.

[0600] Step 0: Only when multiple RB sets are allocated to the UE, the UE first discards the PRBs belonging to the inner guard band.

[0601] Step 1: The UE first discards the PRBs close to the inner guard band or the PRBs located at both ends of each RB set.

[0602] Characteristically, after the UE performs only step 0 of the PRB dropping method, the UE does not expect that a UL resource allocation combination in which the total number of PRBs of all UL resources is not a multiple of 2 and / or 3 and / or 5 will be allocated to the UE.

[0603] Proposed method 5-3-8:

[0604] In the case where the UE is assigned one or more interleaving indices on one or more RB sets (or LBT subbands), when the total number of PRBs of all allocated UL resources is 2 and / or 3 and / or 5, the UE sequentially performs the following PRB dropping method for all allocated UL resources until the reduced number of PRBs becomes a multiple of 2 and / or 3 and / or 5.

[0605] Step 0: Only when the UE is allocated multiple RB sets, the UE first discards the PRBs belonging to the guard band within the RB set. When the number of PRBs excluding the discarded PRBs is a multiple of 2 and / or 3 and / or 5, the UE transmits the PUSCH in the number of PRBs counted by excluding the discarded PRBs. Otherwise, the UE proceeds to the next step, Step 1.

[0606] Step 1: The UE is configured to use only 10 PRBs except the lowest (or highest) one PRB in an interlace including 11 PRBs among the interlaces in each LBT subband for PUSCH transmission.

[0607] Proposed method 5-3-9:

[0608] 5-3-9-A. When the UE is allocated one or more interleaving indices on one or more RB sets (or LBT subbands), the UE calculates the number of PRBs for each interleaving index. The UE then performs discarding for each interleaving index. Specifically, the UE may discard some allocated PUSCH resources so that the number of resources to be used for PUSCH transmission in one interleaving index is a specific maximum number that is equal to or less than the number of PRBs for the corresponding interleaving index. The specific number may be a multiple of K. For example, K may be 2 and / or 3 and / or 5. The discarded PUSCH resources may be selected sequentially starting from the lowest (or highest) CRB (or PRB) index of each interleaving index. Alternatively, the discarded PUSCH resources may be selected sequentially starting from the PRB located in the lowest (or highest) frequency band. Alternatively, the discarded PUSCH resources may be selected alternately from the lowest CRB (or PRB) index and the highest CRB (or PRB) index. Alternatively, the discarded PUSCH resources may be alternately selected from a PRB located in the lowest frequency band and a PRB located in the highest frequency band.

[0609] In addition, the UE can calculate the total number of PRBs including even the PRBs of the inner protection band (i.e., the protection band between LBT subbands) for each allocated interleaving index, or calculate the total number of PRBs excluding the PRBs of the inner protection band for each allocated interleaving index.

[0610] 5-3-9-B. Characteristically, when the number of PRBs per interlace in 5-3-9-A is 32 (=25), the total number of PRBs for the total interlace index may not be suitable for DFT operation, even though 32 is a multiple of 2. Therefore, the case where the number of PRBs per interlace is 32 may not be allowed.

[0611] In addition, when configuring PUCCH signals and PUSCH channels, the UL interleaving configuration methods proposed in Embodiments 1 to 5 are not limited. When configuring other UL channels / signals, the principles / methods proposed in this disclosure can be applied in the same / similar manner.

[0612] In addition, when configuring / mapping / sending a sequence and / or a signal consisting of a sequence (e.g., DMRS) for communication between UEs (e.g., device-to-device (D2D) communication) and / or communication between vehicles (e.g., vehicle-to-everything (V2X) communication) through a side link (SL) or channel (e.g., a feedback channel), the principles / operations / methods proposed in embodiments 1 to 5 of the present disclosure may be applied similarly / similarly.

[0613] It is obvious that each example of the proposed method can also be included as an implementation method, and thus each example can be regarded as a proposed method. Although the proposed methods can be implemented independently, some of the proposed methods can be combined (or merged) to facilitate implementation. In addition, it can be stipulated that information on whether to apply the proposed method (or information on rules related to the proposed method) should be sent from the BS to the UE or from the transmitting UE to the receiving UE via a predefined signal (e.g., a physical layer signal, a higher layer signal, etc.).

[0614] Initial network access and communication processing

[0615] The UE may perform network access processing to execute the procedures and / or methods described / proposed above. For example, while accessing a network (e.g., a BS), the UE may receive system information and configuration information required to execute the procedures and / or methods described / proposed above and store the information in a memory. The configuration information required for the present disclosure may be received via higher-layer signaling (e.g., RRC layer signaling, MAC layer signaling, etc.).

[0616] Figure 28 is a diagram showing the initial network access process and subsequent communication process. In NR, physical channels and reference signals can be sent through beamforming. When beamforming-based signal transmission is supported, beam management processing can be performed to align the beams between the BS and the UE. In addition, the signals proposed in the present disclosure can be sent / received through beamforming. In RRC IDLE mode, beam alignment can be performed based on the synchronization signal block (SSB), and in RRC CONNECTED mode, beam alignment can be performed based on the CSI-RS (in DL) and the SRS (in UL). When beamforming-based signal transmission is not supported, beam-related operations can be skipped in the following description.

[0617] Reference Figure 28, the BS may periodically send SSBs (S702). The SSBs may include PSS / SSS / PBCH. The SSBs may be sent through beam scanning. Subsequently, the BS may send RMSI and other system information (OSI) (S704). The RMSI may include information required for the UE to initially access the BS (e.g., PRACH configuration information). The UE may identify the best SSB after performing SSB detection. The UE may send a random access channel (RACH) preamble (message 1 (Msg1)) to the BS on a PRACH resource linked / corresponding to the index (i.e., beam) of the best SSB (S706). The beam direction of the RACH preamble is associated with the PRACH resource. The association between the SSB (index) and the PRACH resource (and / or RACH preamble) may be configured by system information (e.g., RMSI). Thereafter, as part of the RACH procedure, the BS may transmit a random access response (RAR) (Msg2) in response to the RACH preamble (S708), and the UE may transmit a Msg3 (e.g., RRC Connection Request) using a UL grant in the RAR (S710). The BS may transmit a contention resolution message (Msg4) (S712). Msg4 may include an RRC connection establishment message.

[0618] When the BS and the UE establish an RRC connection through the RACH process, the BS and the UE may perform subsequent beam alignment based on the SSB / CSI-RS (in DL) and the SRS (in UL). For example, the UE may receive the SSB / CSI-RS (S714). The UE may use the SSB / CSI-RS to generate a beam / CSI report. The BS may request a beam / CSI report from the UE through the DCI (S716). In this case, the UE may generate a beam / CSI report based on the SSB / CSI-RS and send the generated beam / CSI report to the BS on the PUSCH / PUCCH (S718). The beam / CSI report may include beam measurement results, information about the preferred beam, etc. The BS and the UE may switch beams based on the beam / CSI report (S720a and S720b).

[0619] Thereafter, the UE and the BS may perform the procedures and / or methods described / proposed above. For example, based on the configuration information obtained from the network access process (e.g., the system information acquisition process, the RACH-based RRC connection process, etc.), each of the UE and the BS may transmit a radio signal by processing the information stored in the memory, or store the received radio signal in the memory after processing the radio signal according to the proposal of the present disclosure. In the case of DL, the radio signal may include at least one of PDCCH, PDSCH, or RS, and in the case of UL, the radio signal may include at least one of PUCCH, PUSCH, or SRS on the UL.

[0620] Discontinuous Reception (DRX) Operation

[0621] The UE can perform a DRX operation while performing the above-described / proposed procedures and / or methods. A UE configured with DRX can reduce power consumption by discontinuously receiving DL signals. DRX can be performed in an RRC_IDLE state, an RRC_INACTIVE state, and an RRC_CONNECTED state. DRX is used for discontinuous reception of paging signals in the RRC_IDLE state and the RRC_INACTIVE state. Now, DRX performed in the RRC_CONNECTED state (RRC_CONNECTED DRX) will be described below.

[0622] Figure 29 is a diagram illustrating a DRX cycle (RRC_CONNECTED state).

[0623] Referring to Figure 29 , the DRX cycle includes an on-duration and a DRX opportunity. The DRX cycle defines a time interval in which the on-duration periodically repeats. The on-duration is a time period in which the UE monitors to receive a PDCCH. When DRX is configured, the UE performs PDCCH monitoring during the on-duration. When any PDCCH is successfully detected during PDCCH monitoring, the UE operates an inactivity timer and remains in a wake-up state. On the other hand, when no PDCCH is successfully detected during PDCCH monitoring, the UE enters a sleep state at the end of the on-duration. Accordingly, when performing the above-described / proposed procedures and / or methods, if DRX is configured, PDCCH monitoring / reception can be performed discontinuously in the time domain. For example, in the disclosure, if DRX is configured, PDCCH reception occasions (e.g., slots with PDCCH search spaces) can be configured discontinuously according to the DRX configuration. In contrast, when performing the above-described / proposed procedures and / or methods, if DRX is not configured, PDCCH monitoring / reception can be performed continuously in the time domain. For example, in the disclosure, if DRX is not configured, PDCCH reception occasions (e.g., slots with PDCCH search spaces) can be configured continuously. Regardless of whether DRX is configured or not, PDCCH monitoring can be limited in a time period configured as a measurement gap.

[0624] Table 36 describes UE operations related to DRX (in the RRC_CONNECTED state). Referring to Table 11, DRX configuration information is received through higher layer (RRC) signaling, and DRX on / off is controlled by a DRX command of the MAC layer. Once DRX is configured, the UE can perform PDCCH monitoring discontinuously while performing the procedures and / or methods described / proposed according to the disclosure, as Figure 29 shown.

[0625] [Table 36]

[0626]

[0627] MAC-CellGroupConfig includes the configuration information required to configure MAC parameters for the cell group. MAC-CellGroupConfig may also include DRX configuration information. For example, MAC-CellGroupConfig may include the following information when defining DRX.

[0628] -drx-OnDurationTimer value: defines the length of the start duration of the DRX cycle.

[0629] -drx-InactivityTimer value: defines the length of time that the UE stays awake after detecting a PDCCH opportunity indicating a PDCCH for initial UL or DL ​​data.

[0630] -drx-HARQ-RTT-TimerDL value: defines the maximum duration from the reception of a DL initial transmission to the reception of a DL retransmission.

[0631] -drx-HARQ-RTT-TimerDL value: defines the length of the maximum duration from receiving a grant for a DL initial transmission to receiving a grant for an UL retransmission.

[0632] drx-LongCycleStartOffset: defines the duration and start time of the DRX cycle.

[0633] -drx-ShortCycle (optional): defines the duration of the short DRX cycle.

[0634] When at least one of drx-OnDurationTimer, drx-InactivityTimer, drx-HARQ-RTT-TimerDL, or drx-HARQ-RTT-TimerDL is running, the UE performs PDCCH monitoring at each PDCCH opportunity while maintaining an awake state.

[0635] Before performing the operations described in various embodiments of the present disclosure, the UE may perform the above-mentioned DRX-related operations. If the UE performs PDCCH monitoring during the on-duration and successfully detects the PDCCH while performing PDCCH monitoring, the UE may perform at least one PUSCH scheduling-related operation according to an embodiment of the present disclosure.

[0636] Implementation Example

[0637] Figure 30 is a flowchart illustrating a signal transmission / reception method according to an embodiment of the present disclosure.

[0638] Reference Figure 30 , the embodiments of the present disclosure may be performed by a UE and include receiving DCI for PUSCH scheduling ( S3001 ) and transmitting a PUSCH based on the DCI ( S3003 ).

[0639] Specifically, the resources for transmitting the PUSCH may be determined using one of the proposed methods described in Embodiment 4 and / or Embodiment 5.

[0640] For example, the PUSCH transmission resources may be determined based on the method 5-3-5-B proposed in Embodiment 5. Specifically, the UE may transmit the PUSCH in a specific number of RBs. The specific number is equal to or less than the total number of PRBs corresponding to the assigned interleaving index. Furthermore, the specific number may be a multiple of K, where K may be 2, 3, and / or 5. Therefore, the specific number may be a maximum number that is equal to or less than the number of RBs allocated by the DCI and is a multiple of 2, 3, and / or 5.

[0641] In addition, according to the proposed method 5-3-5-B, PRBs may be sequentially dropped starting from the PRB with the highest index. Therefore, a certain number of RBs may have relatively low indexes among the RBs allocated through DCI.

[0642] Since the RBs transmitting the PUSCH are selected from one or more interlaces allocated through the DCI, the RBs may still form one or more interlaces.

[0643] In an additional example, the PUSCH transmission resource may be determined based on Option 4-1-3-3 of Embodiment 4. Specifically, when the BWP used for UL transmission includes multiple LBT subbands (i.e., multiple RB sets), and when the UL fallback DCI format is based on the CSS, the PUSCH may be transmitted in a UL RB set that overlaps with the DL RB set configured with the CCR for detecting DCI in the frequency domain. Preferably, the UL RB set for transmitting the PUSCH may overlap with one or X CCEs with the lowest index among the CCEs for detecting DCI. Furthermore, the UL RB set for transmitting the PUSCH may preferably be the lowest specific single UL RB set among the UL RB sets that overlap with the CCE in the frequency domain.

[0644] In summary, when the UE receives the DCI in the CSS, the UE can transmit the PUSCH in a single UL RB set with the lowest index among the UL RB sets overlapping with the CCE with the lowest index among the detected CCEs in the frequency domain. Further, according to Option 4-1-3-3 of Embodiment 4, in the absence of the UL RB set overlapping with the DL RB set of the mapped CCE and / or the configured CCE, the UE can transmit the PUSCH in the RB set with the lowest index in the BWP for UL transmission. The UL fallback DCI format can be DCI format 0_0.

[0645] The method 5-3-5-B proposed in Embodiment 5 and Option 4-1-3-3 of Embodiment 4 can be performed in combination or independently. The operations of Embodiments 1 to 5 can also be performed in combination or independently.

[0646] Reference is made to Figures 1 to 29 One or more of the described operations and / or operations described with reference to Embodiments 1 to 5 can be additionally performed in combination with the operations described with respect to Figure 30 The described operations.

[0647] Examples of communication systems to which the present disclosure is applied

[0648] The various descriptions, functions, processes, proposals, methods, and / or operation flowcharts of the present disclosure described herein can be applied to (but not limited to) various fields requiring wireless communication / connection between devices (e.g., 5G).

[0649] More specific examples will be described with reference to the accompanying drawings below. In the following drawings / descriptions, like numbers refer to the same or corresponding hardware blocks, software blocks, or functional blocks unless otherwise indicated.

[0650] Figure 31 A communication system 1 to which the present disclosure is applied is shown.

[0651] Reference is made to Figure 31The communication system 1 applied to the present disclosure includes a wireless device, a base station, and a network. A wireless device is a device that performs communication using a radio access technology (RAT) (e.g., 5G NR (or new RAT) or LTE), also known as a communication / radio / 5G device. The wireless device may include (but is not limited to) a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an IoT device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with wireless communication capabilities, an autonomous vehicle, and a vehicle capable of vehicle-to-vehicle (V2V) communication. In this context, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). An XR device may include an augmented reality (AR) / virtual reality (VR) / mixed reality (MR) device and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a television (TV), a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like. Handheld devices may include smartphones, smart tablets, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., laptops). Home appliances may include TVs, refrigerators, washing machines, etc. IoT devices may include sensors, smart meters, etc. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node for other wireless devices.

[0652] Wireless devices 100a to 100f may be connected to a network 300 via a BS 200. AI technology may be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f may be connected to an AI server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, wireless devices 100a to 100f may perform direct communication (e.g., sidelink communication) with each other without the intervention of the BS / network. For example, vehicles 100b-1 and 100b-2 may perform direct communication (e.g., V2V / Vehicle-to-Everything (V2X) communication). IoT devices (e.g., sensors) may perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0653] Wireless communications / connections 150a, 150b, and 150c may be established between wireless devices 100a to 100f, BS 200, and between BSs 200. Here, wireless communications / connections may be established via various RATs (e.g., 5G NR), such as UL / DL communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay or integrated access backhaul (IAB)). Wireless signals may be transmitted and received between wireless devices, between wireless devices and BSs, and between BSs via wireless communications / connections 150a, 150b, and 150c. For example, signals may be transmitted and received via various physical channels via wireless communications / connections 150a, 150b, and 150c. To this end, at least a portion of various configuration information for configuring processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes may be performed based on various proposals of the present disclosure.

[0654] Examples of wireless devices to which the present disclosure is applied

[0655] Figure 32 A wireless device suitable for use with the present disclosure is shown.

[0656] Reference Figure 32 , the first wireless device 100 and the second wireless device 200 can transmit wireless signals via various RATs (e.g., LTE and NR). {The first wireless device 100 and the second wireless device 200} may correspond to Figure 31 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x}.

[0657] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may also include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106 and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed herein. For example, the processor 102 may process information in the memory 104 to generate first information / signals, and then transmit a wireless signal including the first information / signals through the transceiver 106. The processor 102 may receive a wireless signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory 104. The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may store software code including instructions for executing all or part of the processing controlled by the processor 102 or for executing the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed herein. The processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive wireless signals via one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In the present disclosure, a wireless device may be a communication modem / circuit / chip.

[0658] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may also include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206 and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed herein. For example, the processor 202 may process information in the memory 204 to generate third information / signals, and then transmit a wireless signal including the third information / signals through the transceiver 206. The processor 202 may receive a wireless signal including fourth information / signals through the transceiver 106, and then store information obtained by processing the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202 and store various information related to the operation of the processor 202. For example, the memory 204 may store software code including instructions for executing all or part of the processing controlled by the processor 202 or for executing the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed herein. The processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive wireless signals via one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present disclosure, a wireless device may be a communication modem / circuit / chip.

[0659] Now, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers can be implemented by, but are not limited to, the one or more processors 102 and 202. For example, the one or more processors 102 and 202 can implement one or more layers (e.g., functional layers such as physical (PHY), medium access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), RRC, and service data adaptation protocol (SDAP)). The one or more processors 102 and 202 can generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in the present document. The one or more processors 102 and 202 can generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in the present document, and provide the messages, control information, data, or information to the one or more transceivers 106 and 206. The one or more processors 102 and 202 can generate signals (e.g., baseband signals) including the PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in the present document, and provide the generated signals to the one or more transceivers 106 and 206. The one or more processors 102 and 202 can receive signals (e.g., baseband signals) from the one or more transceivers 106 and 206 and acquire the PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in the present document.

[0660] The one or more processors 102 and 202 can be referred to as controllers, microcontrollers, microprocessors, or microcomputers. The one or more processors 102 and 202 can be implemented by hardware, firmware, software, or a combination thereof. For example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) can be included in the one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in the present document can be implemented using firmware or software, and the firmware or software can be configured to include modules, processes, or functions. The firmware or software configured to perform the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in the present document can be included in the one or more processors 102 and 202 or can be stored in the one or more memories 104 and 204 and driven by the one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in the present document can be implemented using firmware or software in the form of codes, instructions, and / or instruction sets.

[0661] The one or more memories 104 and 204 can be connected to the one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories 104 and 204 can be configured to include read-only memories (ROMs), random access memories (RAMs), electrically programmable read-only memories (EPROMs), flash memories, hard disk drives, registers, cache memories, computer-readable storage media, and / or combinations thereof. The one or more memories 104 and 204 can be located inside and / or outside the one or more processors 102 and 202. The one or more memories 104 and 204 can be connected to the one or more processors 102 and 202 by various techniques such as wired or wireless connections.

[0662] One or more transceivers 106 and 206 may transmit user data, control information, and / or wireless signals / channels mentioned in the methods and / or operational flowcharts of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or wireless signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive wireless signals. For example, one or more processors 102 and 202 may execute control so that one or more transceivers 106 and 206 may transmit user data, control information, or wireless signals to one or more other devices. One or more processors 102 and 202 may execute control so that one or more transceivers 106 and 206 may receive user data, control information, or wireless signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received wireless signals / channels from RF band signals to baseband signals so that the received user data, control information, and wireless signals / channels may be processed using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, and wireless signals / channels processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0663] Example of use of a wireless device to which the present disclosure is applied

[0664] Figure 33 Another example of a wireless device applicable to the present disclosure is shown. The wireless device can be used according to the usage / service (refer to Figure 31 ) are implemented in various forms.

[0665] Reference Figure 33 , the wireless devices 100 and 200 may correspond to Figure 32The wireless devices 100 and 200 may be configured to include various elements, components, units / portions, and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and additional components 140. The communication unit 110 may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include Figure 32 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include Figure 32 The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional components 140, and provides overall control of the wireless device. For example, the control unit 120 may control the electrical / mechanical operation of the wireless device based on the program / code / instructions / information stored in the memory unit 130. The control unit 120 may transmit information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 via a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit 110 via the wireless / wired interface in the memory unit 130.

[0666] The additional component 140 may be configured in various ways depending on the type of wireless device. For example, the additional component 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be configured in the following ways: Figure 31 100a), vehicles ( Figure 31 100b-1 and 100b-2), XR devices ( Figure 31 100c), handheld device ( Figure 31 100d), household appliances ( Figure 31 100e), IoT devices ( Figure 31 100f), digital broadcasting terminal, holographic device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Figure 31 400), BS( Figure 31 200), network nodes, etc. Depending on the use case / service, the wireless device can be mobile or fixed.

[0667] exist Figure 33In the wireless devices 100 and 200, the various elements, components, units / portions, and / or modules may all be connected to each other via a wired interface, or at least a portion thereof may be wirelessly connected via the communication unit 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 may be wired, and the control unit 120 and the first unit (e.g., 130 and 140) may be wirelessly connected via the communication unit 110. The various elements, components, units / portions, and / or modules in the wireless devices 100 and 200 may also include one or more elements. For example, the control unit 120 may be configured using a collection of one or more processors. For example, the control unit 120 may be configured using a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit, and a memory control processor. In another example, the memory unit 130 may be configured using RAM, dynamic RAM (DRAM), ROM, flash memory, volatile memory, non-volatile memory, and / or a combination thereof.

[0668] Examples of vehicles or autonomous driving vehicles to which the present disclosure is applied

[0669] Figure 34 A vehicle or autonomous driving vehicle applicable to the present disclosure is shown. The vehicle or autonomous driving vehicle can be implemented as a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0670] Reference Figure 34 , the vehicle or autonomous driving vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as a part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to Figure 33 Blocks 110 / 130 / 140.

[0671] The communication unit 110 can send and receive signals (e.g., data and control signals) to and from external devices such as other vehicles, base stations (e.g., gNBs and roadside units), and servers. The control unit 120 can perform various operations by controlling components of the vehicle or autonomous vehicle 100. The control unit 120 may include an ECU. The drive unit 140a enables the vehicle or autonomous vehicle 100 to travel on a road. The drive unit 140a may include an engine, a motor, a power system, wheels, brakes, a steering system, and the like. The power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and may include wired / wireless charging circuitry, a battery, and the like. The sensor unit 140c can acquire information regarding vehicle status, surrounding environment information, user information, and the like. The sensor unit 140 c may include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a location module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140 d may implement a technology for maintaining the lane in which the vehicle is traveling, a technology for automatically adjusting the speed (e.g., adaptive cruise control), a technology for autonomously traveling along a determined path, a technology for traveling by automatically setting a route if a destination is set, etc.

[0672] For example, the communication unit 110 may receive map data, traffic information data, and the like from an external server. The autonomous driving unit 140d may generate an autonomous driving route and driving plan based on the obtained data. The control unit 120 may control the drive unit 140a so that the vehicle or autonomous driving vehicle 100 moves along the autonomous driving route according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit 110 may aperiodically or periodically obtain recent traffic information data from the external server and obtain surrounding traffic information data from neighboring vehicles. During autonomous driving, the sensor unit 140c may obtain information regarding the vehicle's status and / or surrounding environment. The autonomous driving unit 140d may update the autonomous driving route and driving plan based on the newly obtained data / information. The communication unit 110 may transmit information regarding the vehicle's location, autonomous driving route, and / or driving plan to the external server. The external server may use AI technology to predict traffic information data based on information collected from the vehicle or autonomous driving vehicle and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0673] Those skilled in the art will appreciate that the present disclosure may be implemented in other specific ways than those described herein without departing from the spirit and essential characteristics of the present disclosure. Therefore, the above-described embodiments are to be construed in all respects as illustrative and not restrictive. The scope of the present disclosure should be determined by the appended claims and their legal equivalents (rather than the above description), and all changes coming within the meaning and equivalent range of the appended claims are intended to be encompassed therein.

[0674] Industrial Applicability

[0675] As described above, the present disclosure is applicable to various wireless communication systems.

Claims

1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising the following steps: Receiving downlink control information DCI for scheduling a physical uplink shared channel PUSCH in a common search space CSS; as well as sending the PUSCH based on the DCI, wherein resource allocation for the PUSCH is determined based on the indicated interlace and uplink resource block set (uplink RB set), and wherein the uplink RB set is an uplink RB set with a lowest index among uplink RB sets intersecting with a control channel element CCE with a lowest index of a physical downlink control channel PDCCH in which the DCI is detected, and If there is no intersection, the uplink RB set is the uplink RB set with the lowest index in the uplink bandwidth part BWP.

2. The method according to claim 1, wherein The DCI is DCI format 0_0 for fallback operation.

3. A user equipment (UE) in a wireless communication system, the UE comprising: at least one transceiver; at least one processor; as well as at least one memory operatively coupled to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform specific operations, The specific operations include: receiving downlink control information DCI for scheduling a physical uplink shared channel PUSCH in a common search space CSS; and sending the PUSCH based on the DCI, wherein resource allocation for the PUSCH is determined based on the indicated interlace and uplink resource block set (uplink RB set), and wherein the uplink RB set is an uplink RB set with a lowest index among uplink RB sets intersecting with a control channel element CCE with a lowest index of a physical downlink control channel PDCCH in which the DCI is detected, and If there is no intersection, the uplink RB set is the uplink RB set with the lowest index in the uplink bandwidth part BWP.

4. The UE according to claim 3, wherein: The DCI is DCI format 0_0 for fallback operation.

5. A device for a user equipment (UE), comprising: at least one processor; as well as at least one computer memory operatively coupled to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations, The operations include: receiving downlink control information DCI for scheduling a physical uplink shared channel PUSCH in a common search space CSS; and sending the PUSCH based on the DCI, wherein resource allocation for the PUSCH is determined based on the indicated interlace and uplink resource block set (uplink RB set), and wherein, wherein the uplink RB set is a lowest-indexed uplink RB set among uplink RB sets intersecting with a lowest-indexed control channel element CCE of a physical downlink control channel PDCCH in which the DCI is detected, and If there is no intersection, the uplink RB set is the uplink RB set with the lowest index in the uplink bandwidth part BWP.

6. The device according to claim 5, wherein The DCI is DCI format 0_0 for fallback operation.

7. A computer-readable storage medium comprising at least one computer program for causing at least one processor to perform operations, in, The operations include: receiving downlink control information DCI for scheduling a physical uplink shared channel PUSCH in a common search space CSS; and sending the PUSCH based on the DCI, wherein resource allocation for the PUSCH is determined based on the indicated interlace and uplink resource block set (uplink RB set), and wherein, wherein the uplink RB set is a lowest-indexed uplink RB set among uplink RB sets intersecting with a lowest-indexed control channel element CCE of a physical downlink control channel PDCCH in which the DCI is detected, and If there is no intersection, the uplink RB set is the uplink RB set with the lowest index in the uplink bandwidth part BWP.

8. The computer-readable storage medium according to claim 7, wherein: The DCI is DCI format 0_0 for fallback operation.

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