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

Abstract

A method and apparatus for transmitting / receiving a signal in a wireless communication system according to an embodiment of the present application can include repeatedly mapping a PUCCH sequence to each resource block (RB) in an interlace, and transmitting the PUCCH on the interlace, wherein a CS value of the PUCCH sequence can vary based on a value determined by multiplying a RB index of each RB by a delta value.

Description

TECHNICAL FIELD

[0001] The disclosure relates to a method and an apparatus for a wireless communication system. BACKGROUND

[0002] Generally, wireless communication systems are developing to differently cover a wide range to provide communication services such as audio communication services, data communication services, etc. Wireless communication is a multiple access system that is capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power, etc.). For example, the multiple access system can 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, etc. SUMMARY

[0003] TECHNICAL PROBLEM

[0004] The disclosure aims to provide a method and an apparatus for efficiently transmitting an uplink channel in a wireless communication system.

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

[0006] TECHNICAL SOLUTION

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

[0008] In an aspect of the disclosure, a method for transmitting and receiving a signal by a user equipment (UE) operating in a wireless communication system is provided. The method can include repeatedly mapping a physical uplink control channel (PUCCH) sequence to each resource block (RB) in an interlace, and transmitting a PUCCH including the PUCCH sequence in the interlace. A cyclic shift (CS) value of the PUCCH sequence can vary according to a value determined by multiplying an RB index of each RB by a delta value.

[0009] In another aspect of the disclosure, a communication device (UE) configured to transmit and receive signals in a wireless communication system is provided. The communication device can include at least one transceiver, at least one processor, and at least one memory operatively connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations including repeatedly mapping a PUCCH sequence to each RB in an interlace and transmitting a PUCCH including the PUCCH sequence in the interlace. A CS value of the PUCCH sequence can vary according to a value determined by multiplying an RB index of each RB by a delta value.

[0010] In another aspect of the disclosure, a device for a UE is provided. The device can include at least one processor and at least one computer memory operatively connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations including repeatedly mapping a PUCCH sequence to each RB in an interlace and transmitting a PUCCH including the PUCCH sequence in the interlace. A CS value of the PUCCH sequence can vary according to a value determined by multiplying an RB index of each RB by a delta value.

[0011] In another aspect of the disclosure, a computer-readable storage medium having at least one computer program is provided, the at least one computer program, when executed, causing at least one processor to perform operations. The operations can include repeatedly mapping a PUCCH sequence to each RB in an interlace and transmitting a PUCCH including the PUCCH sequence in the interlace. A CS value of the PUCCH sequence can vary according to a value determined by multiplying an RB index of each RB by a delta value.

[0012] In the method and device, the delta value can be 5.

[0013] In the method and device, the RB index can be assigned to the RBs in the interlace in order based on frequency locations of the RBs.

[0014] In the method and device, a modulo operation can be performed on the value determined by multiplying the RB index of each RB by the delta value and the number of subcarriers in each RB.

[0015] In the method and device, a phase shift (PS) value can be applied to each RB, and the PS value can be determined based on the RB index of each RB.

[0016] 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.

[0017] The above-described aspects of the present disclosure are merely some preferred embodiments of the present disclosure, and various embodiments reflecting technical features of the present disclosure can be derived and understood from the following detailed description of the present disclosure by those skilled in the art.

[0018] Advantages

[0019] According to embodiments of the present disclosure, a communication device can more efficiently transmit an uplink channel in a different manner from the related art.

[0020] Those skilled in the art will appreciate that the effects realized with the present disclosure are not limited to those specifically described hereinabove, and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] FIG. 1 A radio frame structure is illustrated.

[0022] FIG. 2 A resource grid during the duration of a slot is illustrated.

[0023] FIG. 3 A self-contained slot structure is illustrated.

[0024] FIG. 4 An acknowledgement / negative-acknowledgement (ACK / NACK) transmission process is illustrated.

[0025] FIG. 5 A wireless communication system supporting an unlicensed band is illustrated.

[0026] FIG. 6 An exemplary method of occupying resources in an unlicensed band is illustrated.

[0027] FIG. 7 And FIG. 8 is a flowchart illustrating a channel access procedure (CAP) for signal transmission in an unlicensed band.

[0028] FIG. 9 A resource block (RB) interlace is illustrated.

[0029] FIG. 10 to FIG. 25 is a diagram illustrating an uplink (UL) channel transmission according to embodiments of the present disclosure.

[0030] FIG. 26 to FIG. 29 An apparatus according to embodiments of the present disclosure is illustrated. DETAILED DESCRIPTION

[0031] The following techniques can 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), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. The CDMA can be implemented as a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. The TDMA can 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). The OFDMA can be implemented as a radio technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wireless Fidelity (Wi-Fi)), IEEE 802.16 (Worldwide Interoperability for Microwave Access (WiMAX)), IEEE 802.20, Evolved UTRA (E-UTRA), etc. The UTRA is a part of the Universal Mobile Telecommunications System (UMTS). The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of the Evolved-UMTS (E-UMTS) using the E-UTRA. The LTE-Advanced (LTE-A) is an evolution of the 3GPP LTE. The 3GPP New Radio or New Radio Access Technology (NR) is an evolution of the 3GPP LTE / LTE-A.

[0032] For clarity, 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. The LTE refers to technology beyond 3GPP TS 36.xxx Release 8. Specifically, LTE technology beyond 3GPP TS 36.xxx Release 10 is referred to as LTE-A, and LTE technology beyond 3GPP TS 36.xxx Release 13 is referred to as LTE-A Pro. The 3GPP NR is technology beyond 3GPP TS 38.xxx Release 15. The LTE / NR can be referred to as a 3GPP system. The "XXX" designates a technical specification number. The LTE / NR can be collectively referred to as a 3GPP system. The background art, terms, abbreviations, etc. as used herein refer to technical specifications published before the present disclosure. For example, the following documents can be referred to.

[0033] 3GPP NR

[0034] - 38.211: Physical channels and modulation

[0035] - 38.212: Multiplexing and channel coding

[0036] - 38.213: Physical layer procedures for control

[0037] - 38.214: Physical layer procedures for data

[0038] - 38.300: NR and NG-RAN overall description

[0039] - 38.331: Radio Resource Control (RRC) protocol specification

[0040] FIG. 1 A radio frame structure for NR is shown.

[0041] 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 a CP-OFDM symbol) and an SC-FDMA symbol (or a discrete Fourier transform-spread-OFDM (DFT-s-OFDM) symbol).

[0042] 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.

[0043] [Table 1]

[0044] SCS (15*2^u) N slot symb ]] N frame，u slot ]] N subframe，u slot ]] 15 KHz (u=0) 14 10 1 30 KHz (u=1) 14 20 2 60 KHz (u=2) 14 40 4 120 KHz (u=3) 14 80 8 240 KHz (u=4) 14 160 16

[0045] *N slot symb : Number of symbols in a slot

[0046] *N frame，u slot : Number of slots in a frame

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

[0048] 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.

[0049] [Table 2]

[0050] SCS (15*2^u) N slot symb ]]> N frame，u slot ]]> N subframe，u slot ]] 60 KHz (u=2) 12 40 4

[0051] In the NR system, different OFDM(A) numerology sets (e.g., SCS, CP length, etc.) can be configured for multiple cells aggregated for one UE. Thus, the (absolute time) duration of a time resource (e.g., subframe, slot, or transmission time interval (TTI)) consisting of the same number of symbols (for convenience, referred to as a time unit (TU)) can be configured differently among the aggregated cells.

[0052] In the NR, various numerologies (or SCSs) can be supported to support various 5th generation (5G) services. For example, for a 15 kHz SCS, a wide area in a legacy cellular band can be supported, while for a 30 kHz or 60 kHz SCS, a dense urban, lower latency, and wide carrier bandwidth can be supported. For a 60 kHz or higher SCS, a bandwidth greater than 24.25 kHz can be supported to overcome phase noise.

[0053] The NR 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).

[0054] [Table 3]

[0055] Frequency Range Designation Corresponding Frequency Range Subcarrier Spacing FR1 450 MHz - 7125 MHz 15, 30, 60 kHz FR2 24250 MHz - 52600 MHz 60, 120, 240 kHz

[0056] FIG. 2 A resource grid is shown for the duration of one slot.

[0057] A slot includes multiple symbols in the time domain. For example, one 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) contiguous subcarriers in the frequency domain. A bandwidth part (BWP) can be defined by multiple contiguous (physical) RBs ((P)RBs) in the frequency domain and corresponds to one numerology (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., 5) BWPs. Data communication can be conducted in an active BWP, and only one BWP can be enabled for one UE. Each element in the resource grid can be referred to as a resource element (RE), to which one complex symbol can be mapped.

[0058] In a wireless communication system, a UE receives information from a BS in a downlink (DL) and transmits information to the BS in an uplink (UL). Information exchanged between the BS and the UE includes data and various control information, and there are various physical channels / signals according to the type / use of information exchanged therebetween. A physical channel corresponds to a set of resource elements (REs) that carry information derived from a higher layer. A physical signal corresponds to a set of REs used by the physical layer but does not carry information derived from a higher layer. The higher layer includes a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, etc.

[0059] A DL physical channel includes a physical broadcast channel (PBCH), a physical downlink shared channel (PDSCH), and a physical downlink control channel (PDCCH). A DL physical signal includes a DL reference signal (RS), a primary synchronization signal (PSS), and a secondary synchronization signal (SSS). A DL RS includes a demodulation reference signal (DM-RS), a phase-tracking reference signal (PT-RS), and a channel state information reference signal (CSI-RS). A UL physical channel includes a physical random access channel (PRACH), a physical uplink shared channel (PUSCH), and a physical uplink control channel (PUCCH). A UL physical signal includes a UL RS. A UL RS includes a DM-RS, a PT-RS, and a sounding reference signal (SRS).

[0060] FIG. 3 A structure of a self-contained slot is shown.

[0061] In an NR system, a frame has a self-contained structure in which a DL control channel, a DL or UL data, a UL control channel, etc. can all be contained in one slot. For example, the first N symbols in a slot (hereinafter, a DL control region) can be used to transmit a DL control channel, and the last M symbols in the slot (hereinafter, a UL control region) can be used to transmit a UL control channel. N and M are integers greater than or equal to 0. A resource region (hereinafter, a 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. The respective parts are listed in a time sequence.

[0062] In the disclosure, a base station (BS) can be, for example, a gNode B (gNB).

[0063] UL Physical Channels / Signals

[0064] (1) PUSCH

[0065] A PUSCH can carry UL data (e.g., uplink shared channel (UL-SCH) transport blocks (TBs)) and / or uplink control information (UCI). A PUSCH can 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 a PUSCH is transmitted based on a DFT-s-OFDM waveform, a UE can transmit the PUSCH by applying transform precoding. For example, when transform precoding is not allowed (e.g., when transform precoding is disabled), a UE can transmit a PUSCH based on a CP-OFDM waveform. When transform precoding is allowed (e.g., when transform precoding is enabled), a UE can transmit a PUSCH based on a CP-OFDM waveform or a DFT-s-OFDM waveform. A PUSCH transmission can be dynamically scheduled by a 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)). Thus, in dynamic scheduling, a PUSCH transmission can be associated with a PDCCH, while in CS, a PUSCH transmission can not be associated with a PDCCH. CS can include a PUSCH transmission based on a type 1 configured grant (CG) and a PUSCH transmission based on a type 2 CG. For a type 1 CG, all parameters for a PUSCH transmission can be signaled by a higher layer. For a type 2 CG, some parameters for a PUSCH transmission can be signaled by a higher layer, and the rest can be signaled by a PDCCH. Essentially, in CS, a PUSCH transmission can not be associated with a PDCCH.

[0066] (2) PUCCH

[0067] A PUCCH can carry UCI. UCI includes the following information.

[0068] - Scheduling Request (SR): SR is information for requesting a UL-SCH resource.

[0069] - Hybrid automatic repeat request acknowledgement (HARQ-ACK): HARQ-ACK is a signal responding to reception of a DL signal (e.g., PDSCH, SPS release PDCCH, etc.). A HARQ-ACK response can include a positive ACK (ACK), a negative ACK (NACK), DTX (discontinuous transmission), or NACK / DTX. A HARQ-ACK can be used interchangeably with A / N, ACK / NACK, HARQ-ACK / NACK, etc. A HARQ-ACK can be generated based on a TB / CBG.

[0070] - Channel State Information (CSI): The CSI is feedback information about a DL channel. The CSI includes a Channel Quality Indicator (CQI), a Rank Indicator (RI), a Precoding Matrix Indicator (PMI), a Precoding Type Indicator (PTI), etc.

[0071] Table 4 shows PUCCH formats. The PUCCH formats can be classified according to a UCI payload size / transmission length (e.g., a number of symbols included in a PUCCH resource) and / or a transmission structure. The 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 the transmission length.

[0072] [Table 4]

[0073]

[0074] (0) PUCCH format 0 (PF0)

[0075] - Supportable UCI payload size: up to K bits (e.g., K = 2)

[0076] - Number of OFDM symbols included in one PUCCH: 1 to X symbols (e.g., X = 2)

[0077] - Transmission structure: only a UCI signal is configured without a DM-RS, and a UCI state is transmitted by selecting and transmitting one of a plurality of sequences.

[0078] (1) PUCCH format 1 (PF1)

[0079] - Supportable UCI payload size: up to K bits (e.g., K = 2)

[0080] - Number of OFDM symbols included in one PUCCH: Y to Z symbols (e.g., Y = 4 and Z = 14)

[0081] - Transmission structure: a UCI and a DM-RS are configured in different OFDM symbols based on time division multiplexing (TDM). For the UCI, a specific sequence is multiplied by a modulation symbol (e.g., a QPSK symbol). A cyclic shift / quadrature cover code (CS / OCC) is applied to both the UCI and the DM-RS to support code division multiplexing (CDM) between a plurality of PUCCH resources (complying with PUCCH format 1) (in the same RB).

[0082] (2) PUCCH format 2 (PF2)

[0083] - Supportable UCI payload size: more than K bits (e.g., K = 2)

[0084] - Number of OFDM symbols included in one PUCCH: 1 to X symbols (e.g., X = 2)

[0085] - Transmission structure: UCI and DMRS (DM-RS) are configured / mapped to the same symbol based on frequency division multiplexing (FDM) and the encoded UCI bits are transmitted by applying inverse fast Fourier transform (IFFT) to them only without DFT.

[0086] (3) PUCCH format 3 (PF3)

[0087] - Supportable UCI payload size: more than K bits (e.g., K = 2)

[0088] - Number of OFDM symbols included in one PUCCH: Y to Z symbols (e.g., Y = 4 and Z = 14)

[0089] - Transmission structure: UCI and DMRS are configured / mapped to different symbols based on 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.

[0090] (4) PUCCH format 4 (PF4)

[0091] - Supportable UCI payload size: more than K bits (e.g., K = 2)

[0092] - Number of OFDM symbols included in one PUCCH: Y to Z symbols (e.g., Y = 4 and Z = 14)

[0093] - Transmission structure: UCI and DMRS are configured / mapped to different symbols based on TDM. DFT is applied to the encoded UCI bits without multiplexing between UEs.

[0094] FIG. 4 ACK / NACK transmission processing is shown. Referring to FIG. 4 , a UE can detect a PDCCH in slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or DCI format 1_1). The PDCCH indicates a DL assignment offset K0 to a PDSCH and a PDSCH to HARQ-ACK reporting offset K1. For example, the DCI format 1_0 or the DCI format 1_1 can include the following information.

[0095] - Frequency domain resource assignment: indicates a set of RBs assigned to a PDSCH.

[0096] - Time domain resource assignment: indicates K0 and the starting position (e.g., OFDM symbol index) and length (e.g., number of OFDM symbols) of the PDSCH in a slot.

[0097] - PDSCH-to-HARQ_feedback timing indicator: indicates K1.

[0098] After receiving the PDSCH in slot #(n+K0) according to the scheduling information of slot #n, the UE can transmit UCI on PUCCH in slot #(n+K1). The UCI includes a HARQ-ACK response to the PDSCH. In the case where the PDSCH is configured to carry one TB at maximum, the HARQ-ACK response can be configured in one bit. In the case where the PDSCH is configured to carry up to two TBs, the HARQ-ACK response can be configured in two bits if spatial bundling is not configured, or in one bit if spatial bundling is configured. When slot #(n+K1) is designated as the HARQ-ACK transmission timing for multiple PDSCHs, the UCI transmitted in slot #(n+K1) includes HARQ-ACK responses to the multiple PDSCHs.

[0099] 1. Wireless communication system supporting unlicensed band

[0100] FIG. 5 An exemplary wireless communication system suitable for supporting unlicensed bands of the present disclosure is shown.

[0101] 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) L CC. 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) U CC. A carrier / carrier frequency of a cell can refer to an operating frequency (e.g., center frequency) of the cell. A cell / carrier (e.g., CC) is often referred to as a cell.

[0102] When the BS and the UE transmit and receive signals on the L CC and the U CC in carrier aggregation as shown in (a) of FIG. 1, FIG. 5 The L CC and the U CC can be configured as a primary CC (PCC) and a secondary CC (SCC), respectively, when the BS and the UE transmit and receive signals on the L CC and the U CC in carrier aggregation as shown in (a) of FIG. 1, FIG. 5 The BS and the UE can transmit and receive signals on one U CC or on multiple U CCs in carrier aggregation as shown in (b) of FIG. 1. In other words, the BS and the UE can transmit and receive signals only on the U CC without using any L CC. For SA operation, PRACH, PUCCH, PUSCH, and SRS transmissions can be supported on the U Cell.

[0103] The signal transmission and reception operations in the unlicensed band as described in this disclosure can be applied to the above deployment scenarios (unless otherwise indicated).

[0104] The following definitions apply to the terms used in this disclosure, unless otherwise indicated.

[0105] - Channel: a carrier or a portion of a carrier consisting of an adjacent set of RBs performing a Channel Access Procedure (CAP) in a shared spectrum.

[0106] - Channel Access Procedure (CAP): a procedure to evaluate channel availability based on sensing prior to signal transmission in order to determine whether other communicating nodes are using the channel. The basic sensing unit is a sensing slot of duration T sl＝ 9us. The BS or UE senses the slot during the sensing slot duration. When the power detected for at least 4us within the sensing slot duration is less than an energy detection threshold X thresh , the sensing slot duration T sl is considered as idle. Otherwise, the sensing slot duration T sl is considered as busy. The CAP can also be referred to as Listen Before Talk (LBT).

[0107] - Channel occupancy: a transmission from a BS / UE on a channel after a CAP.

[0108] - Channel Occupancy Time (COT): the total time a BS / UE and any BS / UE sharing the channel occupancy performs transmissions on the channel after a CAP. With respect to COT determination, if a transmission gap is less than or equal to 25us, the gap duration can be counted into the COT. The COT can be shared for transmissions between a BS and the corresponding UE.

[0109] - DL transmission burst: a set of transmissions from a BS without any gap larger than 16us. Transmissions from a BS separated by a gap larger than 16us are considered as separate DL transmission bursts. The BS can perform transmissions after a gap within a DL transmission burst without sensing the channel availability.

[0110] - UL transmission burst: a set of transmissions from a UE without any gap larger than 16us. Transmissions from a UE separated by a gap larger than 16us are considered as separate UL transmission bursts. The UE can perform transmissions after a gap within a DL transmission burst without sensing the channel availability.

[0111] - 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 NR systems, the discovery burst can include transmissions initiated by the BS including at least SS / PBCH block and also including CORESET for PDCCH scheduling PDSCH carrying SIB1, PDSCH carrying SIB1, and / or non-zero-power CSI-RS.

[0112] FIG. 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 the 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 the clear channel assessment (CCA) is passed. 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.

[0113] 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.

[0114] DL signal transmission method in U band

[0115] The BS can perform one of the following U-band access procedures (e.g., CAP) for DL signal transmission in the U-band.

[0116] (1) Type 1 DL CAP method

[0117] 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:

[0118] - a transmission initiated by the BS including (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

[0119] - a transmission initiated by the BS including (i) a discovery burst only or (ii) a discovery burst multiplexed with non-unicast information.

[0120] FIG. 7 is a flowchart illustrating a CAP operation performed by the BS to transmit a DL signal in the U-band.

[0121] Referring to FIG. 7 , the BS can sense whether the channel is idle for a sensing slot duration of a defer duration T d . Then, if the counter N is zero, the BS can perform a transmission (S1234). In this case, the BS can adjust the counter N by sensing the channel for an additional sensing slot duration according to the following steps:

[0122] Step 1) (S1220) The BS sets N to N init (N = N init ), where N init is a random number uniformly distributed between 0 and CW p . Then, Step 4 is performed.

[0123] Step 2) (S1240) If N > 0 and the BS determines to decrease the counter, the BS sets N to N - 1 (N = N - 1).

[0124] Step 3) (S1250) The BS senses the channel for an additional sensing slot duration. If the additional sensing slot duration is idle (Yes), Step 4 is performed. Otherwise (No), Step 5 is performed.

[0125] Step 4) (S1230) If N = 0 (Yes), the BS terminates the CAP (S1232). Otherwise (No), Step 2 is performed.

[0126] Step 5) (S1260) The BS senses the channel until a busy sensing slot is detected within an additional defer duration T d or all slots of the additional defer duration T d are detected to be idle.

[0127] Step 6) (S1270) If the channel is sensed to be idle for all slot durations of the additional defer duration T d (Yes), Step 4 is performed. Otherwise (No), Step 5 is performed.

[0128] Table 5 illustrates mp , minimum contention window (CW), maximum CW, maximum channel occupancy time (MCOT), and allowed CW sizes vary according to channel access priority class.

[0129] [Table 5]

[0130]

[0131] defer duration T d is configured in the following order: duration T f (16us) + m p consecutive sensing slot durations T sl (9us). T f includes a sensing slot duration T sl at the beginning of the 16us duration.

[0132] satisfies the following relationship: CW min,p < = CW p < = CW max,p . CW p may be initialized to CW p = CW min,p initially and updated (CW size update) based on HARQ-ACK feedback (e.g., ACK or NACK) for a previous DL burst (e.g., PDSCH) before step 1. For example, CW p may be initialized to CW min,p based on HARQ-ACK feedback for a previous DL burst. Alternatively, CW p may be increased to the next highest allowed value or maintained as is.

[0133] (2) Type 2 DL CAP method

[0134] In Type 2 DL CAP, the length of the duration spanned by the sensing slots that are determined to be idle before transmission can be determined. Type 2 DL CAP is classified as Type 2A / 2B / 2C DL CAP.

[0135] Type 2A DL CAP can apply to the following transmissions. In Type 2A DL CAP, the BS can perform transmission immediately after the channel is sensed to be idle for at least a sensing duration T short_dl = 25us. Here, T short_dl includes a duration T f (= 16us) and one sensing slot duration immediately after the duration T f , where the duration T f includes a sensing slot at its beginning.

[0136] - a transmission initiated by the BS including (i) a discovery burst only or (ii) a discovery burst multiplexed with non-unicast information, or

[0137] - a transmission by the BS after a 25us gap in transmission relative to the UE within a shared channel occupancy.

[0138] Type 2B DL CAP applies to a transmission by the BS after a 16us gap in transmission relative to the UE within a shared channel occupancy time. In Type 2B DL CAP, the BS can perform transmission immediately after the channel is sensed to be idle within T f = 16us. Type 2C DL CAP applies to a transmission by the BS after at most 16us gap in transmission relative to the UE within a shared channel occupancy time. In Type 2C DL CAP, the BS does not perform channel sensing before performing transmission. f includes sensing slots within 9us relative to the end of the duration. Type 2C DL CAP applies to a transmission by the BS after at most 16us gap in transmission relative to the UE within a shared channel occupancy time. In Type 2C DL CAP, the BS does not perform channel sensing before performing transmission.

[0139] UL signal transmission method in U band

[0140] A UE can perform Type 1 or Type 2 CAP for UL signal transmission in U band. Typically, the UE can perform a CAP (e.g., Type 1 or Type 2) configured by the BS for UL signal transmission. For example, an UL grant (e.g., DCI format 0_0 and 0_1) scheduling PUSCH transmission can include CAP type indication information for the UE.

[0141] (1) Type 1 UL CAP method

[0142] In Type 1 UL CAP, the length of the duration over which the sensing slot is sensed to be idle before transmission is random. Type 1 UL CAP can apply to the following transmissions.

[0143] - PUSCH / SRS transmission scheduled and / or configured by the BS

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

[0145] - transmission related to random access procedure (RAP)

[0146] FIG. 8 is a flowchart showing the CAP operation performed by the UE to transmit UL signal.

[0147] Referring to FIG. 8 , the UE can sense the channel to be idle within a defer duration T dwhether the channel is idle for the additional sensing slot duration. Then, if the counter N is zero, the UE can perform transmission (S1534). In this case, the UE can adjust the counter N by sensing the channel for the additional sensing slot duration according to the following steps:

[0148] Step 1) (S1520) The UE sets N to N init (N = N init ), where N init is a random number uniformly distributed between 0 and CW p . Then, Step 4 is performed.

[0149] Step 2) (S1540) If N > 0 and the UE determines to decrease the counter, the UE sets N to N - 1 (N = N - 1).

[0150] Step 3) (S1550) The UE senses the channel for the additional sensing slot duration. If the additional sensing slot duration is idle (Yes), Step 4 is performed. Otherwise (No), Step 5 is performed.

[0151] Step 4) (S1530) If N = 0 (Yes), the UE terminates the CAP (S1532). Otherwise (No), Step 2 is performed.

[0152] Step 5) (S1560) The UE senses the channel until a busy sensing slot is detected for the additional defer duration T d or all slots of the additional defer duration T d are detected to be idle.

[0153] Step 6) (S1570) If the channel is sensed to be idle for all slot durations of the additional defer duration T d (Yes), Step 4 is performed. Otherwise (No), Step 5 is performed.

[0154] Table 6 shows that m p , minimum CW, maximum CW, MCOT, and allowed CW size for the CAP vary according to the channel access priority class.

[0155] [Table 6]

[0156]

[0157]

[0158] The defer duration T d is configured in the following order: duration T f (16us) + m p consecutive sensing slot durations T sl (9us). Tf includes a sensing slot duration T at the beginning of the 16us duration sl .

[0159] satisfies the following relationship: CW min,p <= CW p <= CW max,p . CW p may be initialized to 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 may be initialized to CW min,p based on explicit / implicit reception response to previous UL burst. Alternatively, CW p may be increased to the next highest allowed value or maintained as is.

[0160] (2) Type 2 UL CAP method

[0161] In Type 2 UL CAP, the length of the duration spanned by the sensing slot that is sensed as idle before transmission can be determined. Type 2 UL CAP is classified as Type 2A / 2B / 2C UL CAP. In Type 2A UL CAP, the UE can perform transmission immediately after the channel is sensed as idle within sensing duration T short_dl = 25us. Here, T short_dl includes the duration T f (= 16us) and one sensing slot duration immediately after the duration T f . In Type 2A UL CAP, T f includes a sensing slot at its beginning. In Type 2B UL CAP, the UE can perform transmission immediately after the channel is sensed as idle within sensing duration T f = 16us. In Type 2B UL CAP, T f includes a sensing slot within 9us from the end of the duration. In Type 2C UL CAP, the UE does not perform channel sensing before performing transmission.

[0162] RB Interleaving

[0163] FIG. 9 RB interlace is shown. In shared spectrum, considering the regulations on occupied channel bandwidth (OCB) and power spectral density (PSD), a set of non-contiguous RBs (at regular intervals) (or a single RB) in frequency domain can be defined as a resource unit for / allocated as transmitting UL (physical) channel / signal. For convenience, such a set of non-contiguous RBs is defined as RB interlace (or interlace).

[0164] Referring to FIG. 9 A plurality of RB interlaces (interleaves) can be defined in a frequency bandwidth. Here, the frequency bandwidth can include a (wideband) cell / CC / BWP / RB set, and the RB can include a PRB. For example, an interlace #m∈{0,1,...,M-1} can consist of (common) RBs {m,M+m,2M+m,3M+m,...}, where M denotes the number of interlaces. A transmitter (e.g., a UE) can transmit a signal / channel using one or more interlaces. The signal / channel can include a PUCCH or a PUSCH.

[0165] 3. PUCCH transmission in U band

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

[0167] In addition, the PRACH preamble design methods described later can be related to UL transmission, and thus, the methods can be equally applied to the above-described UL signal transmission methods in a U-band system. In order to implement the technical idea of the present disclosure in a corresponding system, the terms, expressions, and structures in the present document can be modified to be suitable for the systems.

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

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

[0170] In the present document, the term "U-band" can be used interchangeably with the term "shared spectrum".

[0171] In a conventional NR system, five PUCCH formats are configured from PUCCH format 0 to PUCCH format 4 as shown in Table 4 above. PUCCH formats 0, 1, and 4 are configured to occupy a single PRB, and PUCCH formats 2 and 3 are configured to occupy 1 to 16 PRBs on an OFDM symbol.

[0172] Hereinafter, a PUCCH format used in a shared spectrum will be described. When a specific apparatus (and / or node) transmits a signal in a shared spectrum, there can be a PSD limitation. For example, according to a European Telecommunications Standards Institute (ETSI) regulation, a signal transmission in a specific frequency band needs to satisfy a PSD of 10 dBm / 1 MHz. When a PUCCH is transmitted in a PUCCH format 0 (one PRB and 180 kHz) if a SCS is 15 kHz, a maximum allowed power of the PUCCH can be about 10 dBm. Generally, a maximum power of a UE is 23 dBm, and the maximum allowed power of 10 dBm is significantly lower than 23 dBm. If the UE transmits a UL signal at 10 dBm, a maximum UL coverage supported by the UE can be reduced. If the UE transmits a PUCCH in a wide frequency domain (F-domain) to increase a transmission power, it can be helpful to solve the problem of the UL coverage reduction. As a regulation in a shared spectrum, there can be an OCB limitation. For example, when a specific apparatus transmits a signal, the signal can need to occupy at least 80% of a system bandwidth. If the system bandwidth is 20 MHz, the signal transmitted by the specific apparatus can need to occupy more than 16 MHz (80% of 20 MHz).

[0173] As a PUCCH structure considering the PSD and OCB regulations, the above-described RB interlacing structure can be used. For example, if the OCB is considered to repeat a PUCCH sequence configured to use one PRB as in a legacy PUCCH of a PUCCH format 0 and / or 1 on PRBs spaced apart by a specific interval in a frequency domain, a PUCCH can be configured. If the PUCCH is transmitted in RB interlacing, the same PUCCH sequence can be repeatedly transmitted. The repeated transmission can increase a peak-to-average power ratio (PAPR) value and a cubic metric (CM) value. However, the lower the PAPR value and CM value, the better the transmission performance. Therefore, a method of selecting a cyclic shift (CS) value and / or a phase shift (PS) value of a PUCCH sequence for each repetition when a PUCCH is transmitted in RB interlacing in a frequency domain considering PAPR and CM will be proposed.

[0174] The method proposed in the disclosure can be applied to other use cases as well as NR U bands. For example, the method proposed in the disclosure can be used for a non-terrestrial network (NTN) based on NR.

[0175] 3.1 Embodiment 1

[0176] According to Embodiment 1, when a PUCCH sequence is transmitted in a PRB, a start CS value to be applied to the PUCCH sequence can be set differently from each other. Hereinafter, the PUCCH sequence can be simply referred to as a sequence. The start CS value can be denoted by CS_start.

[0177] In particular, a single PUCCH signal can be configured with multiple PUCCH sequences. The multiple PUCCH sequences can be repeatedly mapped and / or transmitted on multiple PRBs included in one interlace. For example, when there are multiple PRBs included in one interlace, one separate / independent PUCCH sequence can be mapped to and / or transmitted in each PRB. The CS value applied to each sequence can be configured to have different values for each PRB.

[0178] By applying a PS to each element / sample included in one (frequency domain) sequence and / or the subcarriers mapped with the elements / samples, the CS can be set and / or applied to different values. For example, if a CS = a is multiplied by a set of L elements / samples included in a length L sequence {s_0, s_1, …, s_(L-1)}, the sequence to which the CS is applied can be represented by {e j*0*a *s_0, e j*1*a *s_1, …, e j*(L-1)*a *s_(L-1)}.

[0179] As an example, consider a transmission of 2-bit UCI on PUCCH format 0 (PF0) (simply referred to as 2-bit UCI on PF0), the 2-bit UCI can be represented by four CS values: CS_start, CS_start+3, CS_start+6, and CS_start+9. In this case, different CS_start values can be applied to each PRB (or sequence). For example, the CS_start values can be determined as a function of the PRB index (in the PUCCH) included in the PUCCH resource. As an input value for determining the CS_start value, the PRB index can be referred to as a logical PRB index. In addition, the CS_start values can be configured to have a certain pattern for each PRB (or sequence). Hereinafter, the PRB index can be used interchangeably with the logical PRB index.

[0180] As another example, consider a transmission of 2-bit UCI on PUCCH format 1 (PF1) (simply referred to as 2-bit UCI on PF1), a CS value corresponding to CS_start can be applied to a sequence mapped to both UCI symbols and DMRS symbols. In this case, the CS_start value can vary for each PRB (or sequence). For example, the CS_start value can be determined as a function of the PRB index (in the PUCCH) included in the PUCCH resource. In addition, the CS_start value can be configured to have a certain pattern for each PRB (or sequence). In this case, the 2-bit UCI can be mapped to the UCI symbols based on quadrature phase shift keying (QPSK).

[0181] There can be a pre-given / configured CS value when generating a PUCCH sequence of PF0 and PF1. The pre-given / configured CS value can be used for inter-cell interference randomization. When the pre-given and / or configured CS value is assumed as CS=a, a CS (or CS_start) value determined according to the respective embodiments can be additionally applied to a sequence obtained by applying CS=a.

[0182] As described above, when different (starting) CS values are applied to PUCCH sequences, PUCCH sequences having different CS values can be mapped to respective PRBs, thereby having an advantage in terms of PAPR and / or CM performance. If there are 10 PRBs and the length of each sequence is 12, the method described in Embodiment 1 can be expressed as shown in FIG. 2. FIG. 10

[0183] For example, when the method of applying different CSs to respective PRBs is reflected in the sequence generation formula of PF0 and PF1, it can be expressed as follows.

[0184] (1) PF0

[0185] The base sequence of PF0 is defined according to Equation 1.

[0186] [Equation 1]

[0187]

[0188] In Equation 1, n denotes the length of the PUCCH sequence and is defined by In the conventional NR system, since PF0 is transmitted in one RB, satisfies On the other hand, in NR-U, PF0 can be transmitted over multiple PRBs. Therefore, when PF0 is transmitted in NR-U, the method of applying different CSs to respective PRBs can be expressed by Equation 2.

[0189] [Equation 2]

[0190]

[0191] In Equation 2, i denotes the PRB index and is defined by denotes the total number of PRBs for (repeatedly) transmitting the corresponding PUCCH. In this case, α i may vary according to the PRB index.

[0192] (2) PF1

[0193] The base sequence of PF0 is defined according to Equation 3 and Equation 4.

[0194] [Equation 3]

[0195] ​​

[0196] [Formula 4]

[0197]

[0198] Similar to PF0, n is the length of the PUCCH sequence and is defined by In a conventional NR system, since PF0 is transmitted in one RB, it satisfies On the other hand, in NR-U, PF0 can be transmitted over multiple PRBs. Therefore, when PF1 is transmitted in NR-U, a method of applying different CSs to each PRB can be expressed by Formula 5 and Formula 6.

[0199] [Formula 5]

[0200]

[0201] [Formula 6]

[0202]

[0203] In Formula 5 and Formula 6, i denotes a PRB index and is expressed by . denotes the total number of PRBs for which a corresponding PUCCH is (repeatedly) transmitted. In this case, α i may vary according to the PRB index.

[0204] Hereinafter, Embodiment 1 will be described in more detail.

[0205] Embodiment 1-1

[0206] The starting CS value applied to the PUCCH sequence to be repeatedly transmitted in each of the multiple PRBs included in one interlace can be configured to have different values for each PRB group.

[0207] According to Embodiment 1-1, the PRBs included in one interlace can be divided into two or more groups.

[0208] As an example, when one interlace includes two groups, the two groups can be defined as follows: a PRB group of even-numbered PRBs and a PRB group of odd-numbered PRBs. The PRB group of even-numbered PRBs can include PRBs having PRB indices 0, 2, 4,..., and the PRB group of odd-numbered PRBs can include PRBs having PRB indices 1, 3, 5,.... The CS_start value to be applied to the PRB group of even-numbered PRBs can be X, and the CS_start value to be applied to the PRB group of odd-numbered PRBs can be Y, where X and Y have different values. For example, X = 0 and Y = 1.

[0209] As another example, one interlace can include three groups. The first group can consist of PRBs with PRB indices 0, 3, 6, and 9. The second group can consist of PRBs with PRB indices 1, 4, and 7 or 1, 4, 7, and 10. The third group can consist of PRBs with PRB indices 2, 5, and 8. The CS_start values to be applied to the first, second, and third groups can be X, Y, and Z, respectively, where X, Y, and Z have different values. For example, X = 0, Y = 1, and Z = 2.

[0210] The starting CS value can be indicated to the UE by the BS through higher layer signaling. Alternatively, the starting CS value can be pre-configured between the BS and the UE.

[0211] For example, two PRB groups can be defined as follows: a PRB group of odd-numbered PRBs and a PRB group of even-numbered PRBs. The CS_start value to be applied to the PRB group of even-numbered PRBs can be X, and the CS_start value to be applied to the PRB group of odd-numbered PRBs can be Y. In this case, initialcyclicshift_evennumberedPRB and initialcyclicshift_oddnumberedPRB can be introduced to RRC parameters PUCCH-format0 and PUCCH-format1, and the CS_start value can be indicated by the corresponding parameters. For example, the BS can inform the UE of initialcyclicshift_evennumberedPRB = 0 and initialcyclicshift_oddnumberedPRB = 1 to indicate the values of X and Y, respectively.

[0212] Table 7 shows PAPR and CM measured while changing the starting CS value according to Embodiment 1-1 for an interlace consisting of 10 PRBs.

[0213] [Table 7]

[0214] Starting CS value of each PRB PAPR (dB) CM (dB) [0,0,0,0,0,0,0,0,0,0] 8.675 10.062 [0,1,0,1,0,1,0,1,0,1] 7.6001 8.218 [0,1,2,0,1,2,0,1,2,0] 6.7929 7.286 [0,1,2,3,4,0,1,2,3,4] 5.6803 5.057

[0215] Embodiment 1-2

[0216] The starting CS value applied to the PUCCH sequence to be repeatedly transmitted in each of a plurality of PRBs included in one interlace can be configured to sequentially increase or decrease by the value of X according to the PRB index. In this document, X can be denoted as Δ.

[0217] The X value can be set to be less than or equal to the sequence length.

[0218] The PRB index can be determined based on the frequency location of the PRB included in the interlace. In other words, the PRB index can be determined as a logical PRB index. For example, among PRBs included in one interlace, a PRB at the lowest location in the frequency domain can have a PRB index of 0, and a PRB at the next lowest location in the frequency domain can have a PRB index of 1. That is, indexing can be performed in turn until a PRB at the highest location in the frequency domain.

[0219] The CS value calculated based on the X value and the PRB index can be greater than the sequence length L. An actual CS value can be configured by wrapping around the calculated CS value with respect to the sequence length so that the CS value is less than the sequence length L. Here, the wrapping around can correspond to a modulo or a modulo operation. For example, the actual CS value can be obtained by applying a modulo operation to the calculated CS value.

[0220] Tables 8 to 10 show examples of obtaining a starting CS value through an (X*i) modulo L operation when the PRB index is i and the sequence length is L. For example, when X = 5, i = 4, and L = 12, the starting CS value becomes (5*4) modulo 12 = 8. X*i can be represented by m int .

[0221] Table 8 shows the starting CS value for each PRB index when X = 1.

[0222] [Table 8]

[0223] PRB index 0 1 2 3 4 5 6 7 8 9 (10) Starting CS value 0 1 2 3 4 5 6 7 8 9 10

[0224] Table 9 shows the starting CS value for each PRB index when X = 5.

[0225] [Table 9]

[0226] PRB index 0 1 2 3 4 5 6 7 8 9 (10) Starting CS value 0 5 10 3 8 1 6 11 4 9 2

[0227] Table 10 shows the starting CS value for each PRB index when X = 2.

[0228] [Table 10]

[0229] PRB index 0 1 2 3 4 5 6 7 8 9 (10) Starting CS value 0 2 4 6 8 10 0 2 4 6 8

[0230] The starting CS value can be indicated to the UE by the BS through higher layer signaling. In addition, the starting CS value can be pre-configured between the UE and the BS.

[0231] When the X value and the sequence length L are co-prime numbers, different CS values can be applied to the PUCCH sequence to be repeatedly transmitted in each PRB, thereby having an advantage in terms of PAPR and / or CM performance. Table 11 shows PAPR values and CM values depending on the X value when one interlace consists of 10 PRBs. Referring to Table 11, it can be seen that the PAPR values and the CM values are best when X = 5.

[0232] [Table 11]

[0233] X Starting CS value of each PRB PAPR (dB) CM (dB) 0 [0,0,0,0,0,0,0,0,0,0] 8.675 10.062 1 [0,1,2,3,4,5,6,7,8,9] 3.5401 1.569 5 [0,5,10,3,8,1,6,11,4,9] 3.5708 1.488 2 [0,2,4,6,8,10,0,2,4,6] 4.9783 3.461

[0234] CS value a applied to legacy PUCCH sequence i derived from the following Equation 7.

[0235] [Equation 7]

[0236]

[0237] In Equation 7, denotes a slot index in a radio frame for PUCCH transmission. In addition, l denotes a symbol index for PUCCH transmission under an assumption that a first OFDM symbol index for PUCCH transmission is 0, and l' denotes a first OFDM symbol index in a slot for PUCCH transmission. Accordingly, n cs may be determined based on a time resource allocated to the PUCCH. In addition, m0 is a PRB offset determined based on an RRC parameter, and m cs is a value determined based on a combination of a PUCCH format, a type of SR information to be transmitted, and HARQ information. denotes a number of subcarriers in each RB and can be 12 as described above. Herein, a subcarrier can be referred to as an RE. The sequence length can not exceed a number of REs allocated for PUCCH transmission. In the present specification, the expression "a PUCCH sequence is mapped to a PRB" or "a PUCCH sequence uses one PRB" can mean that a PUCCH sequence length L is 12.

[0238] Equation 8 shows that a starting CS value is sequentially increased by an X value according to a PRB index based on Embodiment 1-2.

[0239] [Equation 8]

[0240]

[0241] According to Equation 8, since the value of m int is X*i, the starting CS value can be obtained through a modulo operation between the sequence length L and a value obtained by adding the value of m int to a value used for legacy PUCCH transmission.

[0242] 3.2. Embodiment 2

[0243] According to Embodiment 2, for each PRB included in an interlace, a different PS value can be multiplied with a PUCCH sequence.

[0244] In particular, a single PUCCH signal can be configured with multiple PUCCH sequences. The multiple PUCCH sequences can be repeatedly mapped and / or transmitted on multiple PRBs included in one interlace. For example, when there are multiple PRBs included in one interlace, a separate / independent PUCCH sequence can be mapped to and / or transmitted in each PRB. The PS value applied to each sequence can be configured to have different values for each PRB. The (starting) CS value applied to each sequence can be set to the same value between PRBs (or sequences).

[0245] The same PS value can be multiplied with each element / sample included in one (frequency domain) sequence and / or the subcarriers mapped with the element / sample. For example, if PS = a is multiplied with a set of L elements / samples included in a length L sequence {s_0, s_1, …, s_(L-1)}, the sequence to which the PS is applied can be represented by {e j*a *s_0, e j*a *s_1, …, e j*a *s_(L-1)}.

[0246] As an example, consider 2-bit UCI on PF0, different PS values can be multiplied with the PUCCH sequence for each PRB. The same CS values 0, 3, 6, and 9 can be applied to the PUCCH sequence for each PRB. The different PS values can be 1, 1i, -1, or -1i. In this case, the PS value can be configured to vary for each PRB (or sequence). For example, the PS value can be determined as a function of the PRB index (in the PUCCH) included in the PUCCH resource. As an input value for determining the PS value, the PRB index can be referred to as a logical PRB index. In addition, the PS value can be configured to have a certain pattern for each PRB (or sequence).

[0247] As another example, consider 2-bit UCI on PF1, different PS values can be multiplied with the sequence mapped to the UCI symbol and the DMRS symbol for each PRB. The same CS value can be applied to the PUCCH sequence for each PRB. In this case, the PS value can be configured to vary for each PRB (or sequence). For example, the PS value can be determined as a function of the PRB index (in the PUCCH) included in the PUCCH resource. In addition, the PS value can be configured to have a certain pattern for each PRB (or sequence).

[0248] As described above, when different PS values are multiplied with PUCCH sequences, PUCCH sequences having different PS values can be mapped to each PRB, thereby having advantages in terms of PAPR and / or CM performance. In Embodiment 1, CS is implemented in the frequency domain, and a PS value according to an RE index gradually increasing is reflected as a PS of each RE in the same PRB. On the other hand, according to Embodiment 2, the same PS value is applied to each RE in the same PRB. If there are 10 PRBs, the method described in Embodiment 2 can be expressed as shown in FIG. 11. FIG. 11

[0249] Hereinafter, Embodiment 2 will be described in more detail.

[0250] Embodiment 2-1

[0251] A PS value to be multiplied with a PUCCH sequence to be repeatedly transmitted in each of a plurality of PRBs included in one interlace can be configured to have a specific pattern so that the PS value varies for each PRB.

[0252] A specific PS pattern can be set to a value obtained from an experiment using four PS values 1, 1i, -1, and -1i.

[0253] FIG. 12 Results of testing PAPR and CM performance by fixing a phase of a first PRB to 1 (i.e., 0°) and applying all four PS values 1, 1i, -1, -1i (i.e., 0°, 90°, 180°, and 270°) to the remaining 9 PRBs in an interlace structure consisting of 10 PRBs are shown. Specifically, FIG. 12 Combinations of the first 20 PS values are shown based on CM performance. FIG. 12 The 20 combinations shown can be regarded as PS value patterns of Embodiment 2.

[0254] FIG. 13 Results of testing PAPR and CM performance by fixing a phase of a first PRB to 1 (i.e., 0°) and applying all four PS values 1, 1i, -1, -1i (i.e., 0°, 90°, 180°, and 270°) to the remaining 10 PRBs in an interlace structure consisting of 11 PRBs are shown. Specifically, FIG. 13 Combinations of the first 20 PS values are shown based on CM performance. FIG. 13 The 20 combinations shown can be regarded as PS value patterns of Embodiment 2.

[0255] In particular, the first four PS value patterns show superior PAPR and CM performance than the other 16 PS value patterns. Therefore, in FIG. 13 ​In particular, a single PUCCH signal can be configured with multiple PUCCH sequences. The multiple PUCCH sequences can be repeatedly mapped and / or transmitted on multiple PRBs included in one interlace. For example, when there are multiple PRBs included in one interlace, a separate / independent PUCCH sequence can be mapped and / or transmitted in each PRB. Different UCI bit to constellation mapping can be configured and / or applied for each PRB. The same (starting) CS value and / or PS value can be applied for each PRB (or sequence).

[0256] 3.3. Embodiment 3

[0257] According to embodiment 3, different UCI bit to constellation mapping can be applied for each PRB.

[0258] In particular, a single PUCCH signal can be configured with multiple PUCCH sequences. The multiple PUCCH sequences can be repeatedly mapped and / or transmitted on multiple PRBs included in one interlace. For example, when there are multiple PRBs included in one interlace, a separate / independent PUCCH sequence can be mapped and / or transmitted in each PRB. Different UCI bit to constellation mapping can be configured and / or applied for each PRB. The same (starting) CS value and / or PS value can be applied for each PRB (or sequence).

[0259] As an example, consider 2-bit UCI on PF0, different constellation mapping can be applied for each PUCCH sequence repeatedly mapped and / or repeatedly transmitted in each of the multiple PRBs included in one interlace while maintaining Gray coding for the bit set {00, 01, 11, 10} as follows: CS set 1 = {0+a, 3+a, 6+a, 9+a} and CS set 2 = {9+a, 6+a, 3+a, 0+a}, where a can be one of 0, 3, 6, and 9. Due to the constellation mapping, different CS sets and / or different a values can be applied for each PRB. Gray coding refers to an encoding scheme in which only one digit changes in adjacent digits when the value changes. For example, the number of cases that can be represented by an n-bit binary Gray code can be 2n n , and a binary Gray code can represent 2 n times differently.

[0260] As another example, consider 2-bit UCI on PF1, different constellation mapping can be applied for QPSK mapping on UCI symbols of each PRB while maintaining Gray coding for the bit set {00, 01, 11, 10} as follows: PS set 1 = {1, 1i, -1, -1i} * b and PS set 2 = {-1i, -1, 1i, 1} * b, where b can be one of 1, 1i, -1, and -1i. Due to the constellation mapping, different PS sets and / or different b values can be applied for each PRB. Additionally, PS can be applied to DMRS sequences according to the constellation mapping in UCI symbols. For example, the phase value to be applied to the DMRS sequence can be the phase value mapped to a particular bit in the UCI symbols. The particular bit can be, for example, bit 00.

[0261] According to Embodiment 3, PUCCH transmission performance can be guaranteed since Gray coding is always maintained.

[0262] 3.4. Embodiment 4

[0263] According to Embodiment 4, Embodiment 1 and Embodiment 2 can be combined.

[0264] Specifically, according to Embodiment 1, different CS values can be applied to each PRB, and according to Embodiment 2, different PS values can be applied to each PRB. The number of different sequences generated by combining Embodiment 1 and Embodiment 2 is much greater than the number of different sequences generated by Embodiment 1 or Embodiment 2 alone (mapped to PRBs, respectively). Therefore, a lower PAPR / CM value (better performance) can be obtained by combining Embodiment 1 and Embodiment 2.

[0265] A single PUCCH signal can be configured with multiple PUCCH sequences. The multiple PUCCH sequences can be repeatedly mapped and / or transmitted on multiple PRBs included in one interlace. For example, when there are multiple PRBs included in one interlace, one separate / independent PUCCH sequence can be mapped and / or transmitted in each PRB. The CS value applied to each sequence can be configured to have different values for each PRB. In addition, the PS value applied to each sequence can be configured to have different values for each PRB.

[0266] As an example, consider 2-bit UCI on PF0, as described in Embodiment 1, the two bits can be represented by four CS values: CS_start, CS_start+3, CS_start+6, and CS_start+9. In this case, different CS_start values can be applied to each PRB (or sequence), while different PS values (e.g., 1, 1i, -1, or -1i) can be multiplied by each PRB (or sequence) to map and / or transmit the PUCCH.

[0267] As another example, consider 2-bit UCI on PF1, as described in Embodiment 1, the CS value corresponding to CS_start can be a sequence mapped to both UCI symbols and DMRS symbols. In this case, different CS_start values can be applied to each PRB (or sequence), while different PS values (e.g., 1, 1i, -1, or -1i) can be multiplied by each PRB (or sequence) to map and / or transmit the PUCCH.

[0268] Compared with the method of Embodiment 1 or Embodiment 2 using only CS values or PS values, the method of applying a combination of different CS values and different PS values to multiple PRBs (or sequences) has an advantage in PAPR and / or CM performance.FIG. 14 is a graph illustrating embodiment 4 when there are 10 PRBs and the length of each sequence is 12.

[0269] Hereinafter, embodiment 4 will be described in more detail.

[0270] Embodiment 4-1

[0271] The (start) CS value applied to the PUCCH sequence to be repeatedly transmitted in each of the plurality of PRBs included in one interlace can be configured to have different values for each PRB group. In addition, the PS value to be multiplied by the PUCCH sequence to be mapped to each PRB and / or transmitted in each PRB can be configured to have a specific pattern so that the PS value varies for each PRB. In other words, embodiment 1-1 and embodiment 2-1 can be combined. Each PRB can be identified by the logical PRB index described above.

[0272] According to embodiment 4-1, the PRBs included in one interlace can be divided into two or more groups.

[0273] The start CS value can be indicated to the UE by the BS through higher layer signaling. In addition, the start CS value can be pre-configured between the UE and the BS.

[0274] The specific PS pattern can be set to a value obtained from an experiment using four PS values 1, 1i, -1, and -1i.

[0275] [Experiment 1] In an interlace structure consisting of 10 PRBs, the start CS value of each PRB is configured according to the previously proposed pattern (e.g., [0, 1, 0, 1, 0, 1, 0, 1, 0, 1]). Thereafter, the PAPR and CM performance are tested by fixing the phase of the first PRB to 1 (i.e., 0°) and applying all four PS values [1, 1i, -1, -1i] (i.e., 0°, 90°, 180°, 270°) to the remaining 9 PRBs. The first PRB is the PRB having the lowest logical PRB index, i.e., the PRB at the lowest position in the frequency band. FIG. 15 shows the combination of the top 20 PS values with respect to the CM performance based on the test results of experiment 1.

[0276] Referring to FIG. 15 the results, it can be seen that the PAPR and CM performance are improved compared to when only the CS value is set to 0, 1, 0, 1, 0, 1, 0, 1, 0, and 1 and the PS value is not applied. In addition, it can also be seen that the PAPR and CM performance are improved compared to when only the PS value is applied (in embodiment 1, the PAPR is about 7.60001 dB and the CM is about 8.218 dB, and in embodiment 2-1, the PAPR is about 3.567 dB and the CM is about 1.663 dB).

[0277] [Experiment 2] In an interleaving structure consisting of 11 PRBs, the starting CS value of each PRB is configured according to the previously proposed pattern (e.g., [0, 1, 0, 1, 0, 1, 0, 1, 0, 1]). Thereafter, the PAPR and CM performance are tested by fixing the phase of the first PRB to 1 (i.e., 0°) and applying all four PS values [1, 1i, -1, -1i] (i.e., 0°, 90°, 180°, 270°) to the remaining 9 PRBs. The first PRB is the PRB having the lowest logical PRB index, i.e., the PRB at the lowest position in the frequency band. FIG. 16 The test results based on Experiment 2 are shown with respect to the combination of the top 20 PS values in terms of CM performance.

[0278] According to Embodiment 4, the 40 PS combinations obtained from the results of Experiment 1 and Experiment 2 can be considered when mapping and / or transmitting a single PUCCH signal in an interleaving consisting of 10 or 11 PRBs.

[0279] Embodiment 4-2

[0280] The (starting) CS value applied to the PUCCH sequence to be repeatedly transmitted in each of the plurality of PRBs included in one interleaving can be configured to sequentially increase or decrease by the value of X according to the PRB index. In addition, the PS value to be multiplied by the PUCCH sequence to be mapped to each PRB and / or transmitted in each PRB can be configured to have a certain pattern so that the PS value varies for each PRB. In other words, Embodiment 1-2 and Embodiment 2-1 can be combined.

[0281] The X value can be set to be less than or equal to the sequence length.

[0282] Each PRB can be identified by the logical PRB index described above.

[0283] The CS value calculated based on the X value and the PRB index can be greater than the sequence length L. The actual CS value can be configured by wrapping around the calculated CS value with respect to the sequence length so that the CS value is less than the sequence length L.

[0284] The starting CS value can be indicated to the UE by the BS through higher layer signaling. In addition, the starting CS value can be pre-configured between the UE and the BS.

[0285] The certain PS pattern can be set to the values obtained from the experiments using the four PS values 1, 1i, -1, and -1i.

[0286] [Experiment 1] In an interleaving structure consisting of 10 PRBs, the starting CS value of each PRB is configured according to the previously proposed pattern (e.g., [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]). Thereafter, PAPR and CM performance are tested by fixing the phase of the first PRB as 1 (i.e., 0°) and applying all four PS values [1, 1i, -1, -1i] (i.e., 0°, 90°, 180°, 270°) to the remaining 9 PRBs. The first PRB is the PRB having the lowest logical PRB index, i.e., the PRB at the lowest position in the frequency band. FIG. 17 The test results based on Experiment 1 are shown with respect to the top 20 PS value combinations in terms of CM performance.

[0287] Referring to FIG. 17 As a result, the top four results have superior performance in terms of PAPR / CM compared to the remaining results.

[0288] [Experiment 2] In an interleaving structure consisting of 11 PRBs, the starting CS value of each PRB is configured according to the previously proposed pattern (e.g., [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]). Thereafter, PAPR and CM performance are tested by fixing the phase of the first PRB as 1 (i.e., 0°) and applying all four PS values [1, 1i, -1, -1i] (i.e., 0°, 90°, 180°, 270°) to the remaining 9 PRBs. The first PRB is the PRB having the lowest logical PRB index, i.e., the PRB at the lowest position in the frequency band. FIG. 16 The test results based on Experiment 2 are shown with respect to the top 20 PS value combinations in terms of CM performance.

[0289] According to Embodiment 4, 40 PS combinations obtained from the results of Experiment 1 and Experiment 2 can be considered when mapping and / or transmitting a single PUCCH signal in an interleaving consisting of 10 or 11 PRBs.

[0290] Specifically, the top four combinations (i.e., indices 1, 111026, 139811, and 234388 in Experiment 1 and indices 1, 444103, 559241, and 937551 in Experiment 2) have the following characteristics. The top four combinations can be regarded as representative combinations of CS values and PS values in Embodiment 4-2.

[0291] - Index 1 in Experiment 1 (Index 1 in Experiment 2): This is a pattern to which no PS is applied.

[0292] - Index 111026 in Experiment 1 (Index 444103 in Experiment 2): The phases are shifted clockwise by 90° in PRB order.

[0293] - Index 111026 in Experiment 1 (Index 444103 in Experiment 2): the phases are shifted clockwise (counter-clockwise) by 90° in PRB order.

[0294] - Index 111026 in Experiment 1 (Index 444103 in Experiment 2): the phases are shifted clockwise (counter-clockwise) by 90° in PRB order.

[0295] Thus, when the CS is configured to increase the value of X according to the PRB index (e.g., [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, (10)]), the PS pattern can be configured to have a PS value such that the phases increase the value of Y according to the PRB index.

[0296] For example, if Y is Pi / 2 (= 90°), Index 111026 in Experiment 1 (Index 444103 in Experiment 2) can be configured and / or applied. If Y is Pi (= 180°), Index 139811 in Experiment 1 (Index 559241 in Experiment 2) can be configured and / or applied. If Y is -Pi / 2 (= -90°), Index 234388 in Experiment 1 (Index 937551 in Experiment 2) can be configured and / or applied.

[0297] 3.5 Embodiment 5

[0298] Embodiment 1 and Embodiment 3 can be combined. According to Embodiment 1, different CS values can be applied to each PRB, and according to Embodiment 3, different UCI bit to constellation mapping can be applied to each PRB. Similar to what is described in Clause 3.4, the number of different sequences generated by combining Embodiment 1 and Embodiment 3 is much larger than the number of different sequences generated by Embodiment 1 or Embodiment 3 alone (mapped to PRBs, respectively). Thus, lower PAPR / CM values (better performance) can be obtained by combining Embodiment 1 and Embodiment 3.

[0299] That is, in addition to applying different starting CS values to PUCCH sequences that are repeatedly transmitted over multiple PRBs, different UCI bit to constellation mapping can also be applied to each PRB. The multiple PRBs can be spaced apart by a certain frequency interval.

[0300] For example, for 2-bit UCI on PF0, a combination of CS_start value and constellation can be applied to each PUCCH sequence repeatedly transmitted in each PRB while maintaining Gray coding for the bit set {00, 01, 11, 10}: CS = {CS_start + a, CS_start + 3 + a, CS_start + 6 + a, CS_start + 9 + a} or {CS_start + 9 + a, CS_start + 6 + a, CS_start + 3 + a, CS_start + a}, where a can be one of 0, 3, 6, and 9.

[0301] 3.6. Embodiment 6

[0302] Embodiment 2 and Embodiment 3 can be combined. According to Embodiment 2, different PS values can be applied to each PRB, and according to Embodiment 3, different UCI bit to constellation mapping can be applied to each PRB. Similar to Embodiments 4 and 5, the number of different sequences generated by combining Embodiment 2 and Embodiment 3 is much greater than the number of different sequences generated only by Embodiment 2 or Embodiment 3 (mapped to PRBs). Thus, a lower PAPR / CM value (better performance) can be obtained by combining Embodiment 2 and Embodiment 3.

[0303] That is, in addition to multiplying different PS values to PUCCH sequences repeatedly transmitted over multiple PRBs, different UCI bit to constellation mapping can be applied to each PRB. The multiple PRBs can be spaced apart by a certain frequency interval.

[0304] For example, for 2-bit UCI on PF0, different constellation mapping can be applied to each PUCCH sequence repeatedly transmitted in each PRB while maintaining Gray coding for the bit set {00, 01, 11, 10}: {0 + a, 3 + a, 6 + a, 9 + a} or {9 + a, 6 + a, 3 + a, 0 + a}. In addition, different PS values can be multiplied by each PRB (or sequence). For the PS values, the patterns proposed in Embodiments 2 or 3 can be applied. Here, a can be one of 0, 3, 6, and 9.

[0305] Additional embodiments based on Embodiments 1 to 6

[0306] In a certain system, a combination of CS values and / or PS values can be selected and / or applied based on the results of the proposed embodiments (Embodiment 1 to Embodiment 6). For example, when PUCCH format 0 of NR-U is used, each interlace (or interlace index) included in the PUCCH can consist of 10 or 11 RBs. A short sequence can be repeatedly transmitted in each of the plurality of RBs included in one interlace. The short sequence can be a computer-generated sequence (CGS) of length 12.

[0307] When a short sequence is repeatedly transmitted in an interlace consisting of 10 RBs, Embodiment 1-2 can be applied. For example, in Embodiment 1-2, if X has a value of 1, the starting CS value applied to each RB / sequence can be sequentially set as 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 in order of RBs (in the PUCCH resource).

[0308] When a short sequence is repeatedly transmitted in an interlace consisting of 11 RBs, Embodiment 2-1 can be applied. For example, based on the test results of Experiment 2 of Embodiment 2-1, the first four PS patterns can be sequentially applied in order of RBs (in the PUCCH resource). For example, assuming that the index 421477 is applied, the PS values applied to each RB / sequence can be sequentially set as 1, 1i, -1, 1i, -1, -1i, -1, 1i, -1, 1i, and 1 in order of RBs (in the PUCCH resource).

[0309] The method in Embodiment 6 can be applied not only to PUCCH but also to UL, DL, and / or sidelink channels and / or signals configured in the form of an interlace consisting of 10 or 11 RBs and / or sequences.

[0310] In addition, the experiments of each embodiment are performed based on 30 kHz SCS, but similar results can also be obtained for other SCS. Therefore, regardless of the SCS, each embodiment can be considered / applied. In addition, the experiments of each embodiment are mainly performed based on PUCCH format 0, but similar results can also be obtained for other PUCCH formats. Therefore, each embodiment can be applied to other PUCCH formats (e.g., PUCCH format 1, PUCCH format 4, etc.).

[0311] For example, when 15 kHz SCS is used, the total number of PRBs can increase. However, when actually transmitting a PUCCH, one interlace can consist of 10 or 11 PRBs. In other words, for both cases of when 15 kHz SCS is used and when 30 kHz SCS is used, one interlace can be identically configured. The interval between PRBs in one interlace can increase. Therefore, the proposed embodiments can be applied to other SCS.

[0312] It is also possible to load additional information on the PS pattern proposed in Embodiment 2. Since additional information is loaded on the PS pattern, this method can be used in Embodiment 4 and Embodiment 6 using the PS pattern. Specifically, when a specific N number of PS patterns are pre-configured and / or pre-defined, one of the N number of PS patterns can be selected and applied to the UL channel and / or signal. The UL channel and / or signal can be, for example, a PUCCH. The UL channel and / or signal can (further) include a specific UCI having log2(N) bits. In addition, the UL channel and / or signal can (further) include a specific UCI having ceil(log2(N)) or floor(log2(N)) bits. For example, based on the experimental results described above, the specific N number of PS patterns can be PS patterns selected due to excellent PAPR / CM performance. As an example, HARQ-ACK information / bits can be transmitted based on a CS (or CS pattern) applied to a plurality of sequences constituting a PUCCH or QPSK / BPSK (Binary Phase Shift Keying) modulation symbols mapped to the sequences, while SR information and / or bits can be transmitted based on a PS (or PS pattern) applied to a plurality of sequences constituting a corresponding PUCCH. The SR information and / or bits can be, for example, whether a transmitted SR is positive or negative. As another example, 2-bit information can be transmitted based on the first four PS patterns (see FIG. 13 , FIG. 17 and FIG. 18 ) in the experiments of the present disclosure. For example, according to Experiment 2 of Embodiment 2, the first four PS value patterns (i.e., indices 43171, 532523, 421477, and 976621 in Experiment 2) show excellent PAPR / CM compared to other PS value patterns. Accordingly, 2-bit information can be transmitted based on one or more of the four indices (indices 43171, 532523, 421477, and 976621). Further, in a specific cell, 1-bit information can be transmitted based on two of the first four indices, and in a cell adjacent to the specific cell, 1-bit information can be transmitted based on the remaining two indices. In this case, the additional information can be, for example, positive / negative SR and / or ACK / NACK feedback.

[0313] In addition, a PS and / or CS pattern having good PAPR / CM performance can be mapped to information expected to have a high transmission / reception frequency between a UE and a BS. For example, since the transmission / reception frequency of ACK is expected to be high in the case of HARQ A / N, and the transmission / reception frequency of negative SR is expected to be high in the case of SR, a PS pattern having index 43171 and / or index 532523 showing the best performance among the results of Experiment 2 in Embodiment 2 can be used to transmit ACK or negative SR.

[0314] As a specific example, the UE can be configured to transmit positive / negative SR information based on the PS pattern as shown in Table 12.

[0315] [Table 12]

[0316] Index PS pattern Information 43171 [1,1,1,-1,-1,-1,1,-1,-1,1,-1] Positive SR 532523 [1,-1,1,1,-1,1,1,1,-1,-1,-1] Negative SR

[0317] Hereinafter, how two different UEs transmit PUCCH by applying the pattern shown in Table 12 will be described. It is assumed that PUCCH transmissions of two UEs (e.g., UE1 and UE2) are multiplexed on the same PUCCH resource. In addition, according to the configuration of the BS, UE1 represents ACK / NACK with (starting) CS values of 0 and 6, and UE2 represents ACK / NACK with (starting) CS values of 3 and 9. If UE1 transmits positive SR and UE2 transmits negative SR according to the example in Table 12, the two UEs can be configured with FIG. 19 the PUCCH interlace structure shown.

[0318] If UE1 and UE2 transmit PUCCH as shown in FIG. 19 , the BS can know which (starting) CS values UE1 and UE2 use to transmit PUCCH. The BS can perform detection based on the sequence of the PUCCH transmitted from UE1 and UE2. Thereafter, the BS can obtain the PS pattern values used by UE1 and UE2, and thus, the BS can receive additional information (e.g., positive SR, negative SR, etc.).

[0319] When this method is applied, additional information can be exchanged in a new domain (i.e., PUCCH PS pattern), and thus, reliability can be improved compared to when only a constellation is used as in the prior art.

[0320] Hereinafter, a power offset configuration method based on Embodiments 1 to 6 will be described.

[0321] Even when different information is transmitted according to the proposed method of transmitting additional information (e.g., SR information, A / N information, etc.) with a plurality of different CS patterns, the same CS value can be used in a specific PRB included in a corresponding interlace. For example, the method of transmitting additional information with a plurality of different CS patterns means that additional information is transmitted by selecting and / or applying one of a plurality of CS patterns according to whether the information is negative SR or positive SR or whether the information is ACK or NACK. For example, considering the transmission of SR information with different CS patterns, when 2-bit A / N+SR is transmitted on the PUCCH format 0 (which can be referred to as enhanced PUCCH format 0) proposed in this document, the CS value for each PRB included in the interlace can be determined as shown in FIG. 20 .

[0322] In FIG. 20In this case, the initial CS value (e.g., M0+Mcs) of 2-bit A / N is set to {0, 3, 6, 9} = {NN, NA, AA, AN}. Embodiment 1-2 is used for negative SR, and X is set to 1 (where X is the CS spacing between adjacent PRBs). Embodiment 1-2 is used for positive SR, and X is set to 7 (=1+6). In this case, 5 and 11 (=5+6) can be set instead of 1 and 7 (=1+6), and their order can be changed. As can be seen, the same CS value is always used in odd-numbered PRB indices (i.e., PRB #1, #3, #5,..., #9) when NN+negative SR is transmitted (second column of FIG. 20 ), and when AA+positive SR is transmitted (seventh column of FIG. 20 ). Accordingly, the time slot in which 2-bit A / N and SR are transmitted (2-bit A / N+SR time slot) can have worse A / N performance compared to the time slot in which only 2-bit A / N is transmitted (2-bit A / N only time slot).

[0323] When a method of transmitting additional information (e.g., SR information, A / N information, etc.) with multiple different CS patterns is used, if the same CS value is applied to the PRBs included in the interlace to transmit different information, a transmission power offset can be used for the corresponding PUCCH transmission. For example, when the same CS value is applied to half of the PRBs included in the interlace as shown in FIG. 20 , the UE can be configured to use a high power of N dB (e.g., N=3) in the time slot in which 2-bit A / N and SR are transmitted together compared to the time slot in which only 2-bit A / N is transmitted. As another example, when a second A / N is transmitted based on another CS pattern, the power used for the 2-bit A / N only time slot can be N dB (e.g., N=3) higher than the power used for the 1-bit A / N only time slot.

[0324] This can be summarized as follows. When UCI is transmitted on PUCCH, the PUCCH transmission power offset when one fixed CS pattern is applied can be set to be different from the PUCCH transmission power offset when multiple different CS patterns are applied (one of them is selected and applied). For example, the offset when UCI is transmitted on PUCCH by applying multiple different CS patterns can be N dB (N>0) (e.g., N=3) higher than the offset when UCI is transmitted on PUCCH by applying one fixed CS pattern.

[0325] Hereinafter, a method of transmitting second TB A / N information with different CS patterns is described.

[0326] It can be assumed that the SR information is transmitted with multiple different CS patterns and the BS transmits two DCIs scheduling two TBs. In this case, the UE can miss the DCI scheduling the second TB. The UE can have the initial CS mapping values as shown in Table 13. In Table 13, the two letters in front of "+" respectively indicate whether the first and second TBs are A / N, and Pos / Neg after "+" indicates the type of SR. For example, "NA+Neg" in Table 13 means that the first TB is NACK, the second TB is ACK, and the SR is negative. Similarly, "AN+Pos" means that the first TB is ACK, the second TB is NACK, and the SR is positive.

[0327] [Table 13]

[0328]

[0329] When the UE fails to receive the DCI scheduling the second TB, if the UE knows that the reception result of the first TB is ACK and intends to transmit a negative SR, the UE selects CS pattern 1 and the initial CS value 6. In this case, since the BS assumes that the corresponding UE receives both TBs, the BS can determine that the second TB is ACK (the UE normally receives the second TB). Finally, an N-to-A error (strictly speaking, a DTX-to-A error) occurs.

[0330] To solve this problem, the following two methods are proposed.

[0331] Proposed Method 1: Mapping based on Table 14 under the assumption of 2-bit A / N (in the case of 1-bit A / N, the second bit is regarded as NACK from the UE's perspective)

[0332] [Table 14]

[0333]

[0334] When the UE transmits 1-bit A / N, the second bit can always be regarded as NACK as shown in Table 14. According to this mapping, when the UE transmits only the result of the first TB, the BS can always identify the second TB as NACK. Thus, the risk of an N-to-A error (or a DTX-to-A error) can be removed.

[0335] As another method, an N-to-A error (or a DTX-to-ACK error) can be handled by modifying the 2-bit A / N mapping as shown in Table 15.

[0336] [Table 15]

[0337]

[0338] Proposed Method 2: Mapping and transmitting A / N of the second TB with different CS patterns as shown in Table 16

[0339] [Table 16]

[0340]

[0341] As shown in Table 16, the UE can use the same CS pattern and different initial CS values when transmitting 1-bit A / N+SR, and the UE can use different CS patterns when transmitting A / N of the second TB. According to this mapping, when the UE transmits only the result of the first TB, the BS can always recognize the second TB as NACK. Thus, the risk of N-to-A error (or DTX-to-A error) can be removed.

[0342] In addition, the method of configuring 1-bit A / N+SR as shown in Table 15 has the advantage of maintaining compatibility with the method used in the legacy system. The proposed method 2 can also be expressed as shown in Table 17.

[0343] [Table 17]

[0344]

[0345] Hereinafter, a method of using different CS patterns in a slot in which only SR is transmitted (SR-only slot) will be described.

[0346] Different CS patterns (or different PS patterns) can be used for PUCCH transmission of SR information only. As an example, the BS can assign the same initial CS value to one UE for SR information transmission. The BS can instruct the UE to transmit a specific SR (process or index) based on X=1 and another SR (process or index) based on X=7 (=1+6). As another example, the BS can assign the same initial CS value to a plurality of UEs (e.g., two UEs: UE1 and UE2) for SR information transmission. The BS can instruct UE1 to transmit an SR based on X=1 and an SR based on X=7 (=1+6).

[0347] According to the above-described method, the advantage is that the PUCCH resource capacity or UE multiplexing capacity for SR transmission increases compared to when SR information is transmitted based on only the initial CS value. For example, if the number of different CSs available for the same initial CS value is N, the PUCCH resource capacity or UE multiplexing capacity can be doubled, so that 2N PUCCH resources and UEs can be supported.

[0348] In the above-proposed method, transmission of different information in different CS patterns can be modified to transmission of different information in different PS patterns. In addition, although the value of X is assumed to be 1 for convenience of description, X can be one of the coprime numbers of 12 (e.g., 1, 5, 7, 11).

[0349] 3.7. Embodiment 7

[0350] In Embodiment 1 to Embodiment 6, a method of repeatedly transmitting a plurality of short sequences each having a length of one RB based on an interleaving structure of a single PUCCH has been described. In Embodiment 7, a method of dividing a single long sequence having a length corresponding to (or included in) a total number of REs corresponding to a plurality of PRBs (e.g., N PRBs) constituting an interleaving of a single PUCCH into N parts (by 12 REs) and mapping and transmitting the PUCCH to each of the N PRBs will be described.

[0351] As an example, if the total number of PRBs included in a certain interleaving is 10, the total number of REs included in the certain interleaving is 10 (PRBs) * 12 (subcarriers per PRB) = 120. In this case, the length of a Zadoff-Chu (ZC) sequence is determined to be the largest prime number less than or equal to 120. Since the largest prime number less than or equal to 120 is 113, the length of the ZC sequence can be 113. The remaining 7 REs can be configured to have the same values as the first part of the length 113 sequence. In other words, CS can be applied. For example, when a set of 113 elements constituting a length 113 sequence is defined as {e1, e2,..., e113}, a length 120 sequence can be defined as {e1, e2,..., e113, e1, e2,..., e7} by copying and concatenating the first 7 elements to the end of the length 113 sequence. The length 120 sequence is divided into 10 parts, and each part is mapped to each PRB by 12 REs to perform PUCCH transmission.

[0352] As another example, if the total number of PRBs is 11, the total number of REs included in a certain interleaving is 11 (PRBs) * 12 (subcarriers per PRB) = 132. In this case, the length of a Zadoff-Chu (ZC) sequence is determined to be the largest prime number less than or equal to 132. Since the largest prime number less than or equal to 132 is 131, the length of the ZC sequence can be 131. The remaining one RE can be configured to have the same values as the first part of the length 131 sequence. In other words, CS can be applied. For example, when a set of 131 elements constituting a length 131 sequence is defined as {e1, e2,..., e131}, a length 132 sequence can be defined as {e1, e2,..., e131, e1} by copying and concatenating the first element to the end of the length 131 sequence. The length 132 sequence is divided into 11 parts, and each part is mapped to each PRB by 12 REs to perform PUCCH transmission.

[0353] When generating a PUCCH sequence for U-band operation according to Embodiment 7, the PUCCH needs to be designed to have good PAPR / CM performance because the PUCCH is an UL channel transmitted by a UE. Accordingly, the following method can be applied to improve the PAPR / CM performance.

[0354] Embodiment 7-1: Instead of using a maximum prime number smaller than or equal to the total number of REs on which the PUCCH is mapped as the sequence length, a prime number smaller than or equal to the total number of REs on which the PUCCH is mapped and having good PAPR / CM performance among prime numbers can be used as the sequence length.

[0355] As an example, when the total number of PRBs included in a specific interlace is 11 (i.e., when the total number of REs is 132), the PAPR / CM performance can be obtained as shown in Table 7-1. FIG. 21

[0356] Referring to Table 7-1, FIG. 21 it can be seen that the prime number whose result of the modulo 12 operation is 5 (and / or 7) has good PAPR / CM performance. Accordingly, the prime number whose result of the modulo 12 operation is 5 (and / or 7) can be selected as the sequence length.

[0357] Specifically, when the total number of PRBs included in a specific interlace is 11, the sequence length can be set to 127, 113, 103, 101, 89, etc.

[0358] As another example, when the total number of PRBs included in a specific interlace is 10 (i.e., when the total number of REs is 120), the PAPR / CM performance can be obtained as shown in Table 7-2. FIG. 22

[0359] Referring to Table 7-2, FIG. 22 it can be seen that the prime number whose result of the modulo 12 operation is 5 (and / or 7) has good PAPR / CM performance. Accordingly, the prime number whose result of the modulo 12 operation is 5 (and / or 7) can be selected as the sequence length.

[0360] Specifically, when the total number of PRBs included in a specific interlace is 10, the sequence length can be set to 113, 103, 101, 89, 79, etc.

[0361] Embodiment 7-1 can be summarized as follows. When a prime number is smaller than or equal to the total number of REs included in a specific interlace and when its result of the modulo 12 operation is 5 (and / or 7), the prime number can be selected as the sequence length. A PUCCH sequence can be generated and / or transmitted according to the selected length.

[0362] ​​The prime numbers greater than 30 and less than 132 and the result of modulo 12 operation equal to 5 or 7 are listed as follows: 127, 113, 103, 101, 89, 79, 67, 53, 43, 41, and 31. The listed values can be used as the length of the PUCCH sequence.

[0363] Embodiment 7-2: The basic idea of Embodiment 7-2 follows Embodiment 7-1. However, to further reduce the standardization effort, the same PUCCH sequence length can be configured even when the total number of PRBs included in a particular interlace is different (e.g., 11 RBs and 10 RBs).

[0364] As an example, for both cases, the sequence length can be set to 113 (or 103): when the total number of PRBs included in a particular interlace is 11 (i.e., when the total number of REs is 132) and when the total number of PRBs included in a particular interlace is 10 (i.e., when the total number of REs is 120).

[0365] As another example, for both cases, the sequence length can be set to 103 (or 101): when the total number of PRBs included in a particular interlace is 10 (i.e., when the total number of REs is 120) and when the total number of PRBs included in a particular interlace is 9 (i.e., when the total number of REs is 108).

[0366] Since one sequence length is used, the standardization effort can be simplified and the PAPR / CM performance can be guaranteed.

[0367] Embodiment 7-2 can be modified as follows: For an interlace in which the total number of PRBs is greater, a PUCCH sequence of length a can be generated first. Then, for an interlace in which the total number of PRBs is n less than the above interlace, n RBs can be punctured from the length a sequence (as many as the difference in the total number of PRBs included in each interlace), and the remaining part of the sequence can be used.

[0368] As an example, for an interlace including a total of 11 RBs, a PUCCH sequence can be generated to have a sequence length of 113 (or 103) (by cyclic shifting). Then, for an interlace including 10 RBs, the last RB can be punctured from the length 113 PUCCH sequence, and the remaining sequence can be used.

[0369] As another example, for an interlace including a total of 10 RBs, a PUCCH sequence can be generated to have a sequence length of 103 (or 101) (by cyclic shifting). Then, for an interlace including 9 RBs, the last RB can be punctured from the length 103 PUCCH sequence, and the remaining sequence can be used.

[0370] As another example, for an interlace including a total of 11 RBs, a PUCCH sequence can be generated to have a sequence length of 103 (or 101) (by cyclic shifting). Then, for an interlace including 10 RBs, the last RB can be punctured from the length 103 PUCCH sequence, and the remaining sequence can be used. For an interlace including 9 RBs, the last two RBs can be punctured from the length 103 PUCCH sequence, and the remaining sequence can be used.

[0371] When the total number of PRBs included in a specific interlace is 9 (i.e., when the total number of REs is 108), PAPR / CM performance can be obtained as shown in FIG. 23

[0372] In addition, the above-proposed method of configuring multiple sequences is not limited when a PUCCH signal is configured. That is, when one UL channel / signal (e.g., a DMRS signal for PUSCH demodulation, a DMRS for PUCCH demodulation, a PRACH preamble, and an SRS sequence) is configured with multiple sequences, the principles / methods proposed in the present disclosure can be equally / similarly applied.

[0373] In addition, when a single channel (e.g., PUCCH) and / or a single signal (e.g., DMRS) is configured with a single sequence, different CS and / or PS (or a combination thereof) can be applied to multiple channels / signals (or sequences configured for the same). That is, one UE can be configured to simultaneously transmit multiple channels / signals (or sequences configured for the same) to which different CS and / or PS (or a combination thereof) are applied (simultaneously).

[0374] In addition, although embodiments of the present disclosure are described based on UL, they can be applied even in the case of DL when any channel / signal is repeatedly transmitted in the frequency domain. For example, when frequency division multiplexing (FDM) is applied to a wake-up signal (WUS) sequence (for a specific purpose such as UE grouping) in eMTC / NB-IoT, embodiments of the present disclosure can be applied. Since WUS is transmitted in DL (BS -> UE), the transmitter and receiver are reversed compared to the above-described PUCCH transmission. Accordingly, a BS can perform operations described in embodiments of the present disclosure as being performed by a UE, and a UE can perform operations described as being performed by a BS.

[0375] In addition, when a sequence for UE-to-UE communication (e.g., D2D communication) and / or vehicle-to-vehicle communication (e.g., V2X communication) based on a sidelink (SL) or channel (e.g., a feedback channel) is configured / mapped / transmitted and / or a signal (e.g., a DMRS) configured with such a sequence, principles / operations / methods in embodiments of the present disclosure can be equally / similarly applied.

[0376] ​Although the embodiments of the disclosure are described based on the CGS, the embodiments can be applied when a general sequence is used. For example, when the base sequence is an M-sequence, the embodiments of the disclosure can be applied by changing an initial value of a linear feedback shift register (LFSR) instead of changing a root index of a ZC sequence. The method proposed in the embodiments is applicable when the M-sequence is cyclically shifted.

[0377] It is obvious that each of the proposed methods can also be included as one implementation method, and thus each of the proposed methods can be regarded as one 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, information on whether to apply the proposed method (or information on a rule related to the proposed method) should be transmitted from the BS to the UE through a predefined signal (e.g., a physical layer signal, a higher layer signal, etc.).

[0378] The above-described generation of a pseudo-random sequence and a low-PAPR sequence based on an M-sequence can be performed with reference to the operations defined in Table 18, Table 19, and 3GPP TS 38.211.

[0379] [Table 18]

[0380]

[0381] [Table 19]

[0382]

[0383]

[0384] Discontinuous reception (DRX) operation

[0385] While the above-described / proposed procedures and / or methods are performed, the UE can perform a DRX operation. The UE configured with the DRX can reduce power consumption by discontinuously receiving a DL signal. The DRX can be performed in an RRC_IDLE state, an RRC_INACTIVE state, and an RRC_CONNECTED state. The DRX is used for discontinuous reception of a paging signal in the RRC_IDLE state and the RRC_INACTIVE state. Now, the DRX performed in the RRC_CONNECTED state (RRC_CONNECTED DRX) will be described below.

[0386] FIG. 24 FIG. 1 is a diagram illustrating a DRX cycle (RRC_CONNECTED state).

[0387] Referring to FIG. 24A 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 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. Thus, when performing the procedures and / or methods described / proposed above, PDCCH monitoring / reception can be performed discontinuously in time domain if DRX is configured. For example, in the present disclosure, PDCCH reception occasions (e.g., slots with PDCCH search space) can be configured discontinuously according to DRX configuration if DRX is configured. In contrast, when performing the procedures and / or methods described / proposed above, PDCCH monitoring / reception can be performed continuously in time domain if DRX is not configured. For example, in the present disclosure, PDCCH reception occasions (e.g., slots with PDCCH search space) can be configured continuously if DRX is not configured. Regardless of whether DRX is configured or not, PDCCH monitoring can be limited in a time period configured as a measurement gap.

[0388] Table 20 describes UE operation (in RRC CONNECTED state) related to DRX. Referring to Table 20, DRX configuration information is received by higher layer (RRC) signaling and DRX on / off is controlled by DRX command of MAC layer. Once DRX is configured, the UE can perform PDCCH monitoring discontinuously when performing the procedures and / or methods described / proposed according to the present disclosure, as shown in FIG. 20

[0389] [Table 20]

[0390]

[0391] MAC-CellGroupConfig includes configuration information required to configure MAC parameters for a cell group. MAC-CellGroupConfig can also include DRX configuration information. For example, MAC-CellGroupConfig can include the following information when defining DRX.

[0392] - Value of drx-OnDurationTimer: defines the length of the starting duration of the DRX cycle.

[0393] ​- Value of drx-InactivityTimer: defines the length of the duration that the UE is in an awake state after detecting a PDCCH occasion of a PDCCH indicating initial UL or DL data.

[0394] - Value of drx-HARQ-RTT-TimerDL: defines the length of the maximum duration from reception of a DL initial transmission to reception of a DL retransmission.

[0395] - Value of drx-HARQ-RTT-TimerDL: defines the length of the maximum duration from reception of a grant for a DL initial transmission to reception of a grant for a UL retransmission.

[0396] - drx-LongCycleStartOffset: defines the duration and starting time of a DRX cycle.

[0397] - drx-ShortCycle (optional): defines the duration of a short DRX cycle.

[0398] When at least one of the drx-OnDurationTimer, the drx-InactivityTimer, the drx-HARQ-RTT-TimerDL, or the drx-HARQ-RTT-TimerDL is running, the UE performs PDCCH monitoring at each PDCCH occasion while remaining in an awake state.

[0399] Before performing the operations described in the various embodiments of the disclosure, the UE can perform the DRX-related operations described above. If the UE performs PDCCH monitoring during the on duration and successfully detects a PDCCH while performing the PDCCH monitoring, the UE can perform at least one PUSCH scheduling-related operation according to the embodiments of the disclosure.

[0400] Implementation example

[0401] FIG. 25 FIG. 17 is a flowchart illustrating a signal transmission / reception method according to an embodiment of the disclosure.

[0402] Referring to FIG. 25 , the embodiments of the disclosure can be performed by a UE. The embodiments of the disclosure can include repeatedly mapping a PUCCH sequence to each RB in an interlace (S2501), and transmitting a PUCCH including the PUCCH sequence in the interlace (S2503).

[0403] Specifically, to transmit the PUCCH sequence in the interlace, as described above in Embodiments 1-6, the CS value can change for each RB, the PS value can change for each RB, and / or the UCI bit to constellation mapping can be applied for each RB.

[0404] For example, as described in Embodiments 1-2 of the disclosure, the m int value for each RB, the CS value of the PUCCH sequence can change.

[0405] Referring to Table 11, when the value of Δ is 1, 2, or 5, the PUCCH transmission performance increases. Specifically, when the value of Δ is 5, the best PUCCH transmission performance is obtained, and thus the value of Δ can be 5.

[0406] As described above, the RB index of each RB can be a logical RB index within the interlace in which the PUCCH is transmitted, rather than an index considering the active BWP or the entire bandwidth assignment. The RB index is sequentially assigned to each RB based on the frequency position of the RB in the interlace. For example, when the number of RBs included in the interlace is 11, the RB index from 0 to 10 can be assigned to the 11 RBs based on the frequency position. When the number of RBs included in the interlace is 10, the RB index from 0 to 9 can be assigned to the 10 RBs based on the frequency position.

[0407] The m int value determined by multiplying the RB index of each RB by the value of Δ (or the value of X) and the sequence length L (or the number of subcarriers of each RB, which is the same as the sequence length L) can be subjected to a modulo operation. Alternatively, a value obtained by adding a factor for conventional CS derivation to the m int value and the sequence length L can be subjected to a modulo operation.

[0408] Although only the CS value of the PUCCH sequence can change for each RB, the PS value can also change together with the CS value. The PS value can vary according to Embodiment 2. For example, the PS value of each RB can be determined based on the RB index of each RB.

[0409] In addition to the operations described with reference to FIG. 25 , the operations described with reference to FIG. 1 to FIG. 24 and / or one or more of the operations described in Embodiments 1-7 can be combined and additionally performed. As an example, the UE can perform UL LBT before transmitting the PUCCH. As another example, when a single PUSCH and / or multiple PUSCHs are scheduled, the UE can operate according to one or more methods described in Embodiments 1-5.

[0410] Example of communication system to which the present disclosure is applied

[0411] Various descriptions, functions, processes, proposals, methods, and / or operational 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).

[0412] More specific examples will be described below with reference to the accompanying drawings. In the following drawings / description, like reference numerals refer to the same or corresponding hardware blocks, software blocks, or functional blocks unless otherwise indicated.

[0413] FIG. 26 A communication system 1 to which the present disclosure is applied is illustrated.

[0414] Referring to FIG. 26 , the communication system 1 to which the present disclosure is applied includes wireless devices, a BS, and a network. The wireless device is a device that performs communication using a radio access technology (RAT) (e.g., 5G NR (or a new RAT) or LTE), also referred to as a communication / radio / 5G device. The wireless device can 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, the vehicle can include a vehicle having a wireless communication function, an autonomous driving vehicle, and a vehicle capable of vehicle-to-vehicle (V2V) communication. Herein, the vehicle can include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device can include an augmented reality (AR) / virtual reality (VR) / mixed reality (MR) device, and can be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) mounted in a vehicle, a television (TV), a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, etc. The handheld device can include a smartphone, a smartpad, a wearable device (e.g., a smartwatch or smartglasses), and a computer (e.g., a laptop computer). The home appliance can include a TV, a refrigerator, a washing machine, etc. The IoT device can include a sensor, a smartmeter, etc. For example, the BS and the network can be implemented as a wireless device, and a specific wireless device 200a can operate as a BS / network node with respect to other wireless devices.

[0415] The wireless devices 100a-100f can be connected to the network 300 via the BSs 200. The AI technology can be applied to the wireless devices 100a-100f, and the wireless devices 100a-100f can be connected to the AI server 400 via the network 300. The network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a-100f can communicate with each other through the BSs 200 / network 300, the wireless devices 100a-100f can perform direct communication (e.g., sidelink communication) with each other without intervention of the BS / network. For example, the vehicles 100b-1 and 100b-2 can perform direct communication (e.g., V2V / vehicle-to-everything (V2X) communication). The IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a-100f.

[0416] Wireless communication / connections 150a, 150b, and 150c can be established between the wireless devices 100a-100f / BSs 200 and between the BSs 200. Herein, the wireless communication / connections can be established through 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 can be transmitted and received between the wireless devices, between the wireless devices and the BSs, and between the BSs through the wireless communication / connections 150a, 150b, and 150c. For example, signals can be transmitted and received through various physical channels via the wireless communication / connections 150a, 150b, and 150c. To this end, at least a part of various configuration information for 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 can be performed based on various proposals of the disclosure.

[0417] Example of wireless device to which the present disclosure is applied

[0418] FIG. 27 A wireless device suitable for the disclosure is illustrated.

[0419] Referring to FIG. 27 , the first wireless device 100 and the second wireless device 200 can transmit wireless signals through various RATs (e.g., LTE and NR). The {first wireless device 100 and the second wireless device 200} can correspond to FIG. 26 {wireless device 100x and the BS 200} and / or {wireless device 100x and wireless device 100x} of

[0420] The first wireless device 100 can include one or more processors 102 and one or more memories 104, and further include one or more transceivers 106 and / or one or more antennas 108. The processor(s) 102 can control the memory(s) 104 and / or the transceiver(s) 106, and can be configured to implement the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in the present document. For example, the processor(s) 102 can process information in the memory(s) 104 to generate first information / signals, and then transmit wireless signals including the first information / signals through the transceiver(s) 106. The processor(s) 102 can receive wireless signals including second information / signals through the transceiver(s) 106, and then store information obtained by processing the second information / signals in the memory(s) 104. The memory(s) 104 can be connected to the processor(s) 102, and can store various information related to operations of the processor(s) 102. For example, the memory(s) 104 can store software code including instructions for performing all or a part of processes controlled by the processor(s) 102 or for implementing the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in the present document. The processor(s) 102 and the memory(s) 104 can be a part of a communication modem / circuitry / chip designed to implement a RAT (e.g., LTE or NR). The transceiver(s) 106 can be connected to the processor(s) 102 and transmit and / or receive wireless signals through the one or more antennas 108. Each transceiver 106 can include a transmitter and / or a receiver. The transceiver(s) 106 can be used interchangeably with radio frequency (RF) unit(s). In the present disclosure, a wireless device can be a communication modem / circuitry / chip.

[0421] The second wireless device 200 can include one or more processors 202 and one or more memories 204, and further include one or more transceivers 206 and / or one or more antennas 208. The processor(s) 202 can control the memory(s) 204 and / or the transceiver(s) 206, and can be configured to implement the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in the present document. For example, the processor(s) 202 can process information in the memory(s) 204 to generate third information / signals, and then transmit wireless signals including the third information / signals through the transceiver(s) 206. The processor(s) 202 can receive wireless signals including fourth information / signals through the transceiver(s) 106, and then store information obtained by processing the fourth information / signals in the memory(s) 204. The memory(s) 204 can be connected to the processor(s) 202 and store various information related to operations of the processor(s) 202. For example, the memory(s) 204 can store software code including instructions for performing all or a part of the processes controlled by the processor(s) 202 or for implementing the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in the present document. The processor(s) 202 and the memory(s) 204 can be part of a communication modem / circuitry / chip designed to implement a RAT (e.g., LTE or NR). The transceiver(s) 206 can be connected to the processor(s) 202 and transmit and / or receive wireless signals through the one or more antennas 208. Each transceiver 206 can include a transmitter and / or a receiver. The transceiver(s) 206 can be used interchangeably with RF unit(s). In the present disclosure, a wireless device can be a communication modem / circuitry / chip.

[0422] 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.

[0423] 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.

[0424] 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.

[0425] The one or more transceivers 106 and 206 can transmit user data, control information, and / or radio signals / channels mentioned in the methods and / or operational flowcharts of the present document, to one or more other apparatuses. The one or more transceivers 106 and 206 can receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in the present document, from one or more other apparatuses. For example, the one or more transceivers 106 and 206 can be connected to the one or more processors 102 and 202 and transmit and receive radio signals. For example, the one or more processors 102 and 202 can perform control so that the one or more transceivers 106 and 206 can transmit user data, control information, or radio signals to one or more other apparatuses. The one or more processors 102 and 202 can perform control so that the one or more transceivers 106 and 206 can receive user data, control information, or radio signals from one or more other apparatuses. The one or more transceivers 106 and 206 can be connected to the one or more antennas 108 and 208, and the one or more transceivers 106 and 206 can be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in the present document, through the one or more antennas 108 and 208. In the present document, the one or more antennas can be a plurality of physical antennas or a plurality of logical antennas (for example, antenna ports). The one or more transceivers 106 and 206 can convert received radio signals / channels from RF band signals to baseband signals in order to process received user data, control information, and radio signals / channels using the one or more processors 102 and 202. The one or more transceivers 106 and 206 can convert user data, control information, and radio signals / channels processed using the one or more processors 102 and 202 from baseband signals to RF band signals. To do so, the one or more transceivers 106 and 206 can include (analog) oscillators and / or filters.

[0426] Example of use of wireless device to which the present disclosure is applied

[0427] FIG. 28 Another example applied to the wireless device of the present disclosure is illustrated. The wireless device can be implemented in various forms according to use cases / services (refer to FIG. 26 ) in various forms.

[0428] Referring to FIG. 28 , the wireless devices 100 and 200 can correspond to FIG. 27The 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 FIG. 27 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include FIG. 27 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.

[0429] 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: FIG. 19 100a), vehicles ( FIG. 26 100b-1 and 100b-2), XR devices ( FIG. 26 100c), handheld device ( FIG. 26 100d), household appliances ( FIG. 26 100e), IoT devices ( FIG. 26 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 ( FIG. 26 400), BS( FIG. 26 200), network nodes, etc. Depending on the use case / service, the wireless device can be mobile or fixed.

[0430] exist FIG. 28In some embodiments, various elements, components, units / portions, and / or modules in the wireless devices 100 and 200 can all be connected to each other through a wired interface, or at least part of them can be wirelessly connected through the communication units 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 can be connected through a wire, and the control unit 120 and the first units (e.g., 130 and 140) can be wirelessly connected through the communication unit 110. The various elements, components, units / portions, and / or modules in the wireless devices 100 and 200 can also include one or more elements. For example, the control unit 120 can be configured with a set of one or more processors. For example, the control unit 120 can be configured with a set of communication control processor, application processor, electronic control unit (ECU), graphic processing unit, and memory control processor. In another example, the memory unit 130 can be configured with RAM, dynamic RAM (DRAM), ROM, flash memory, volatile memory, non-volatile memory, and / or a combination thereof.

[0431] Example of vehicle or autonomous driving vehicle to which the present disclosure is applied

[0432] FIG. 29 A vehicle or an autonomous driving vehicle applied to the present disclosure is illustrated. The vehicle or the autonomous driving vehicle can be implemented as a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0433] Referring to FIG. 29 , the vehicle or the autonomous driving vehicle 100 can include an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 can be configured as a part of the communication unit 110. The blocks 110 / 130 / 140a to 140d correspond to the blocks 110 / 130 / 140 of FIG. 28 , respectively.

[0434] The communication unit 110 can transmit and receive signals (e.g., data and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. The control unit 120 can perform various operations by controlling elements of the vehicle or the autonomous driving vehicle 100. The control unit 120 can include an ECU. The driving unit 140a can enable the vehicle or the autonomous driving vehicle 100 to travel on a road. The driving unit 140a can include an engine, a motor, a powertrain, a wheel, a brake, a steering device, etc. The power supply unit 140b can supply power to the vehicle or the autonomous driving vehicle 100 and include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c can acquire information about a vehicle state, surrounding environment information, user information, etc. The sensor unit 140c can 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 position 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, an illumination sensor, a pedal position sensor, etc. The autonomous driving unit 140d can implement a technology for maintaining a lane in which the vehicle is traveling, a technology for automatically adjusting a 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.

[0435] For example, the communication unit 110 can receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d can generate an autonomous driving route and a driving plan from the obtained data. The control unit 120 can control the driving unit 140a so that the vehicle or the autonomous driving vehicle 100 can move along the autonomous driving route according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit 110 can acquire recent traffic information data from an external server aperiodically / periodically and surrounding traffic information data from a neighboring vehicle. During autonomous driving, the sensor unit 140c can obtain information about a vehicle state and / or surrounding environment information. The autonomous driving unit 140d can update the autonomous driving route and the driving plan based on newly obtained data / information. The communication unit 110 can transmit information about a vehicle position, an autonomous driving route, and / or a driving plan to an external server. The external server can predict traffic information data using an AI technology based on information collected from vehicles or autonomous driving vehicles and provide the predicted traffic information data to the vehicles or the autonomous driving vehicles.

[0436] Those skilled in the art will appreciate that the disclosure can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the foregoing embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the disclosure should be determined from the appended claims and their legal equivalents (rather than from the foregoing description), which are intended to be construed in the broadest sense allowable. All changes coming within the meaning and equivalency range of the appended claims are intended to be embraced therein.

[0437] Industrial Applicability

[0438] As described above, the disclosure is applicable to various wireless communication systems.

Claims

1. A method for transmitting and receiving signals by a user equipment (UE) operating in a wireless communication system, the method comprising the following steps: Repeatedly mapping the physical uplink control channel PUCCH sequence to each resource block RB in the interlace; as well as sending a PUCCH including the PUCCH sequence in the interlace, The cyclic shift CS value of the PUCCH sequence varies based on a value determined by multiplying the RB index of each RB by a Δ value. The Δ value is 5 and the length of the PUCCH sequence is 12.

2. The method according to claim 1, wherein RB indexes are sequentially assigned to the RBs based on frequency locations of the RBs in the interlaces.

3. The method according to claim 1, wherein A modulo operation is performed on the value determined by multiplying the RB index of each RB by the Δ value and the number of subcarriers in each RB.

4. The method according to claim 1, wherein A phase shift PS value is applied to each RB, and wherein the PS value is determined based on the RB index of each RB.

5. A user equipment (UE) configured to send and receive signals in a wireless communication system, the UE comprising: at least one transceiver; at least one processor; as well as at least one memory operatively connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations comprising: repeatedly mapping a physical uplink control channel (PUCCH) sequence to each resource block (RB) in an interlace; and sending a PUCCH including the PUCCH sequence in the interlace, The cyclic shift CS value of the PUCCH sequence varies based on a value determined by multiplying the RB index of each RB by a Δ value. The Δ value is 5 and the length of the PUCCH sequence is 12. The UE according to claim 5 , wherein: RB indexes are sequentially assigned to the RBs based on frequency locations of the RBs in the interlaces.

7. The UE according to claim 5, wherein: A modulo operation is performed on the value determined by multiplying the RB index of each RB by the Δ value and the number of subcarriers in each RB.

8. The UE according to claim 5, wherein: A phase shift PS value is applied to each RB, and wherein the PS value is determined based on the RB index of each RB.

9. A device for a user equipment (UE), comprising: at least one processor; as well as at least one computer memory operatively connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations comprising: repeatedly mapping a physical uplink control channel (PUCCH) sequence to each resource block (RB) in an interlace; and sending a PUCCH including the PUCCH sequence in the interlace, The cyclic shift CS value of the PUCCH sequence varies based on a value determined by multiplying the RB index of each RB by a Δ value. The Δ value is 5 and the length of the PUCCH sequence is 12.

10. The apparatus according to claim 9, wherein RB indexes are sequentially assigned to the RBs based on frequency locations of the RBs in the interlaces.

11. The apparatus according to claim 9, wherein A modulo operation is performed on the value determined by multiplying the RB index of each RB by the Δ value and the number of subcarriers in each RB.

12. The apparatus according to claim 9, wherein A phase shift PS value is applied to each RB, and wherein the PS value is determined based on the RB index of each RB.

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