Method, device and system for transmitting or receiving uplink control channel

Abstract

The present disclosure relates to a method, device and system for sending or receiving an uplink control channel. A terminal of a wireless communication system is disclosed. The terminal includes a communication module and a processor for controlling the communication module. The processor: determines a first cyclic shift (CS) value based on hybrid automatic repeat request confirmation (HARQ‑ACK) information, which indicates a response to a downlink channel received from a base station; determines a cyclic shift (CS) offset based on request information indicating a request sent by the terminal to the base station; determines a second CS value based on the first CS value and the CS offset, the second CS value indicating the degree of cyclic shifting of a basic sequence for a physical uplink control channel (PUCCH); and sends a PUCCH for simultaneously transmitting request information and HARQ‑ACK information by using a sequence generated by cyclically shifting the basic sequence based on the second CS value.

Description

[0001] This application is a divisional application of a patent application with application number 201880052102.4 (PCT / KR2018 / 009297), which was submitted to the China Patent Office on February 11, 2020, with an international application date of August 13, 2018, and the invention name is “Method, device and system for sending or receiving uplink control channels in a wireless communication system”. Technical Field

[0002] The present disclosure relates to a wireless communication system, and more particularly to a wireless communication method, device and system for transmitting or receiving an uplink control channel. Background Art

[0003] After the commercialization of the fourth generation (4G) communication system, efforts are being made to develop a new fifth generation (5G) communication system in order to meet the growing demand for wireless data services. The 5G communication system is referred to as a beyond-4G network communication system, a post-LTE system, or a new radio (NR) system. In order to achieve high data transmission rates, the 5G communication system includes a system operating using a millimeter wave (mmWave) frequency band of 6 GHz or higher, and includes a communication system operating using a frequency band of 6 GHz or lower in terms of ensuring coverage, so that implementation in base stations and terminals is being considered.

[0004] The 3rd Generation Partnership Project (3GPP) NR system enhances the spectrum efficiency of the network and enables communications providers to provide more data and voice services over a given bandwidth. Therefore, in addition to supporting a large amount of voice, the 3GPP NR system is also designed to meet the needs of high-speed data and media transmission. The advantages of the NR system are higher throughput and lower latency on the same platform, support for frequency division duplex (FDD) and time division duplex (TDD), and lower operating costs with an enhanced end-user environment and simple architecture.

[0005] For more efficient data processing, the dynamic TDD of the NR system can use a method for changing the number of orthogonal frequency division multiplexing (OFDM) symbols that can be used in the uplink and downlink according to the data service direction of the cell user. For example, when the downlink service of the cell is greater than the uplink service, the base station can allocate multiple downlink OFDM symbols to the time slot (or subframe). Information about the time slot configuration should be sent to the terminal.

[0006] In order to mitigate the path loss of radio waves and increase the transmission distance of radio waves in the millimeter wave band, in the 5G communication system, beamforming, massive multiple input / output (massive MIMO), full-size MIMO (FD-MIMO), array antennas, analog beamforming, hybrid beamforming combining analog beamforming and digital beamforming, and massive antenna technology are discussed. In addition, in order to improve the network systematically, in the 5G communication system, technology development related to evolved small cells, advanced small cells, cloud radio access network (cloud RAN), ultra-dense network, device-to-device communication (D2D), vehicle-to-everything communication (V2X), wireless backhaul, non-terrestrial network communication (NTN), mobile network, cooperative communication, multi-point coordination (CoMP), interference cancellation, etc. is underway. In addition, in the 5G system, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) as advanced coding modulation (ACM) schemes and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as advanced connection technologies are under development.

[0007] Meanwhile, in a human-centered connected network where people generate and consume information, the Internet has evolved into an Internet of Things (IoT) network that exchanges information between distributed components such as objects. Internet of Everything (IoE) technology, which combines IoT technology with big data processing technology through connection with a cloud server, is also on the rise. In order to implement IoT, technical elements such as sensing technology, wired / wireless communication and network infrastructure, service interface technology, and security technology are required, so in recent years, technologies such as sensor networks, machine-to-machine (M2M), and machine type communication (MTC) have been studied for connections between objects. In the IoT environment, an intelligent Internet technology (IT) service can be provided that collects and analyzes data generated from connected objects to create new value in human life. Through the integration and hybridization of existing information technology (IT) and various industries, the IoT can be applied to fields such as smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, healthcare, smart appliances, and advanced medical services.

[0008] Therefore, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, machine-to-machine (M2M), and machine-type communications (MTC) are implemented through technologies such as beamforming, MIMO, and array antennas. Cloud RAN as an application of the above-mentioned big data processing technology is an example of the fusion of 5G technology and IoT technology. In general, mobile communication systems have been developed to provide voice services while ensuring user activities.

[0009] However, the mobile communication system is gradually expanding not only voice but also data services, and has now developed to the extent of providing high-speed data services. However, in the mobile communication systems currently providing services, due to resource shortages and users' high-speed service requirements, more advanced mobile communication systems are needed. Summary of the invention

[0010] Technical issues

[0011] The object of the present disclosure is to provide a method and device for effectively transmitting signals in a wireless communication system, especially a cellular wireless communication system. The object of the present disclosure is also to provide a method, device and system for transmitting or receiving an uplink control channel.

[0012] An object of the present disclosure is also to provide a method for simultaneously transmitting HARQ-ACK information and uplink control information other than the HARQ-ACK information.

[0013] An object of the present disclosure is also to provide a method for allocating resources for transmitting an uplink control channel when the uplink control channel and the uplink shared channel are transmitted simultaneously.

[0014] An object of the present disclosure is also to provide a method for mapping uplink control information on resources allocated for an uplink shared channel when the uplink control information is transmitted on resources on which the uplink shared channel is transmitted.

[0015] Technical Solution

[0016] According to an exemplary embodiment of the present disclosure, a user equipment (UE) in a wireless communication system may include a communication module and a processor, the processor being configured to control the operation of the communication module. The processor may be configured to determine a first cyclic shift (CS) value based on hybrid automatic repeat request confirmation (HARQ-ACK) information indicating a response to a downlink channel already received from a base station, and determine a CS offset based on request information indicating a request to be sent from the UE to the base station, determine a second CS value indicating the degree of cyclic shifting of a base sequence to be used in a physical uplink control channel (PUCCH) based on the first CS value and the CS offset, and send a PUCCH for simultaneously transmitting request information and HARQ-ACK information using a sequence generated by cyclically shifting the base sequence based on the second CS value.

[0017] The request information may include a scheduling request (SR) indicating whether uplink radio resource allocation is requested. Here, the processor may be configured to determine the CS offset based on whether the SR is a positive SR for requesting scheduling.

[0018] The second CS value may be any one of a plurality of CS values ​​determined according to a CS offset and the number of bits representing HARQ-ACK information. Here, a plurality of CS values ​​may be configured to have CS values ​​that are different from each other and increase at the same interval based on the minimum CS value among the plurality of CS values. In addition, regardless of whether the SR is a positive SR, the size of the interval may be constant.

[0019] The base sequence may be cyclically shifted by N different CS values, the HARQ-ACK information may include m bits, and the size of the interval may be N / (2 m ). In addition, m can be 2 and N can be 12.

[0020] When the SR is a positive SR, the CS offset may be 1, and when the SR is not a positive SR, the CS offset may be 0.

[0021] When the SR is not a positive SR, the second CS value may be one of 0, 3, 6, and 9.

[0022] When the SR is a positive SR, the second CS value may be one of 1, 4, 7, and 10.

[0023] A transmission resource of a PUCCH format for transmitting the PUCCH may be one resource block representing 12 subcarriers in the frequency domain. Here, the processor may be configured to transmit the PUCCH using the PUCCH format.

[0024] The transmission resource of the PUCCH format may be one or two symbols in the time domain.

[0025] The request information may include a beam recovery request (BR) indicating whether recovery for a beam failure is requested. Here, the processor may be configured to send a PUCCH through a first PUCCH resource configured to send SR and HARQ-ACK information when the BR is not a positive BR for requesting information about the beam, and to send a PUCCH through a second PUCCH resource configured to send a BR other than the first PUCCH resource when the BR is a positive BR.

[0026] The processor may be configured to obtain an initial cyclic shift value. In addition, the processor may be configured to calculate a phase value by which the base sequence is cyclically shifted based on the initial CS value and the second CS value, and generate a sequence by cyclically shifting the base sequence by the phase value.

[0027] According to another exemplary embodiment of the present disclosure, a method for operating a user equipment (UE) in a wireless communication system may include: determining a first cyclic shift (CS) value based on hybrid automatic repeat request acknowledgment (HARQ-ACK) information representing a response to a downlink channel already received from a base station; determining a CS offset based on request information representing a request to be sent from the UE to the base station; determining a second CS value representing a degree of cyclic shift of a basic sequence to be used in a physical uplink control channel (PUCCH) based on the first CS value and the CS offset; and sending a PUCCH for simultaneously transmitting request information and HARQ-ACK information using a sequence generated by cyclically shifting the basic sequence based on the second CS value.

[0028] The request information may include a scheduling request (SR) indicating whether uplink radio resource allocation is requested. In addition, determining the CS offset may include determining the CS offset based on whether the SR is a positive SR for requesting scheduling.

[0029] The second CS value may be any one of a plurality of CS values ​​determined according to a CS offset and the number of bits representing HARQ-ACK information. In addition, a plurality of CS values ​​may be configured with CS values ​​that are different from each other and increase at the same interval based on the minimum CS value among the plurality of CS values. Here, the size of the interval may be constant regardless of whether the SR is a positive SR.

[0030] The base sequence may be cyclically shifted by N CS values ​​different from each other, and the HARQ-ACK information may include m bits. Here, the size of the interval may be N / (2 m ).

[0031] When the SR is a positive SR, the CS offset may be 1, and when the SR is not a positive SR, the CS offset may be 0.

[0032] When the SR is not a positive SR, the second CS value may be one of 0, 3, 6, and 9.

[0033] When the SR is a positive SR, the second CS value may be one of 1, 4, 7, and 10.

[0034] The request information may include a beam recovery request (BR) indicating whether recovery for a beam failure is requested. Here, sending the PUCCH may include sending the PUCCH through a first PUCCH resource configured to send SR and HARQ-ACK information when the BR is not a positive BR for requesting information about the beam, and sending the PUCCH through a second PUCCH resource configured to send a BR other than the first PUCCH resource when the BR is a positive BR.

[0035] Beneficial Effects

[0036] The present disclosure provides a method and device for effectively transmitting signals in a wireless communication system, especially a cellular wireless communication system. The present disclosure also provides a method, device and system for transmitting or receiving an uplink control channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 An example of a radio frame structure used in a wireless communication system is illustrated;

[0038] Figure 2 An example of a downlink (DL) / uplink (UL) time slot structure in a wireless communication system is illustrated;

[0039] Figure 3 is a schematic diagram for explaining physical channels used in a 3GPP system and a typical signal transmission method using the physical channels;

[0040] Figure 4 FIG. 1 illustrates an SS / PBCH block for initial cell access in a 3GPP NR system;

[0041] Figure 5 FIGURE 1 illustrates a process for transmitting control information and control channels in a 3GPP NR system;

[0042] Figure 6 FIGURE 1 illustrates a control resource set (CORESET) in which a physical downlink control channel (PUCCH) may be transmitted in a 3GPP NR system;

[0043] Figure 7 A method for configuring a PDCCH search space in a 3GPP NR system is illustrated;

[0044] Figure 8 is a conceptual diagram illustrating carrier aggregation;

[0045] Fig. 9 It is a schematic diagram for explaining signal carrier communication and multi-carrier communication;

[0046] Fig.10 is a schematic diagram showing an example of applying a cross-carrier scheduling technology;

[0047] Fig.11 is a block diagram showing the configuration of a UE and a base station according to an embodiment of the present disclosure;

[0048] Fig.12 illustrates an example of a sequence-based short PUCCH format according to an embodiment of the present disclosure;

[0049] Fig.13An example of a short PUCCH format based on frequency division multiplexing in an NR system according to an embodiment of the present disclosure is illustrated;

[0050] Fig.14 illustrates a PUCCH frequency resource allocated to a frequency resource at a position contiguous with a PUSCH frequency resource according to an embodiment of the present disclosure;

[0051] Fig.15 FIGURES illustrate PUCCH resources formed according to an embodiment of the present disclosure;

[0052] Fig.16 FIGURES illustrate PUCCH resources formed according to an embodiment of the present disclosure;

[0053] Fig.17 FIG. 4 illustrates a DMRS resource for transmitting a DMRS and a PUCCH resource allocated to a portion of a PUSCH resource according to an embodiment of the present disclosure;

[0054] Fig.18 FIGURE 1 illustrates HARQ-ACK information mapped onto PUSCH resources according to an embodiment of the present disclosure;

[0055] Fig.19 FIG. 2 illustrates HARQ-ACK information mapped onto PUSCH resources according to another embodiment of the present disclosure;

[0056] Fig. 20 FIG. 2 illustrates HARQ-ACK information mapped onto PUSCH resources according to another embodiment of the present disclosure;

[0057] Fig.21 FIG. 1 illustrates HARQ-ACK information mapped onto PUSCH resources according to another embodiment of the present disclosure; and

[0058] Fig. 22 and Fig.23 Illustrated is UCI mapped onto PUSCH resources when two or more antenna ports are allocated to DMRS according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0059] The terms used in the specification adopt general terms, which are currently used as widely as possible by considering the functions in the present invention, but these terms may be changed according to the intentions, habits and emergence of new technologies of the technicians in the field. In addition, in specific cases, there are terms arbitrarily selected by the applicant, and in this case, their meanings will be described in the corresponding description part of the present invention. Therefore, it is intended to reveal that the terms used in the specification should be analyzed not only based on the names of the terms, but also based on the substantial meanings of the terms and contents in the specification.

[0060] Throughout the specification and the claims that follow, when an element is described as being “connected” to another element, the element may be “directly connected” to the other element or “electrically connected” to the other element through a third element. In addition, unless explicitly described to the contrary, the word “comprising” will be understood to imply the inclusion of the stated elements, but not the exclusion of any other elements, unless otherwise specified. Furthermore, in some exemplary embodiments, limitations such as “greater than or equal to” or “less than or equal to” based on specific thresholds may be appropriately replaced with “greater than” or “less than”, respectively.

[0061] The following technologies can be used for 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-FDMA (SC-FDMA), etc. CDMA can be implemented by wireless technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA 2000. TDMA can be implemented by radio technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate (EDGE) GSM Evolution. OFDMA can be implemented by wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE802-20, Evolved UTRA (E-UTRA), etc. UTRA is part of 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 Evolved UMTS Terrestrial Radio Access (E-UTRA) and LTE Advanced (A) is an evolved version of 3GPP LTE. 3GPP New Radio (NR) is a system designed separately from LTE / LTE-A, and is a system for supporting enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (URLLC) and massive machine type communication (mMTC) services, which are requirements of IMT-2020. For the sake of clear description, 3GPP NR is mainly described, but the technical idea of ​​the present invention is not limited thereto.

[0062] Unless otherwise specified in this specification, a base station may refer to a next generation node B (gNB) defined in 3GPP NR. In addition, unless otherwise explained, a terminal may refer to a user equipment (UE).

[0063] Unless otherwise specified herein, the base station may include a next generation node B (gNB) defined in 3GPP NR. In addition, unless otherwise specified, the terminal may include a user equipment (UE). In the following, to help understand the description, the embodiments describe each content separately, but each embodiment may be used in combination with each other. In this specification, the configuration of the UE may indicate the configuration of the base station. In more detail, the base station may configure the value of a parameter used in the operation of the UE or the wireless communication system by sending a channel or a signal to the UE.

[0064] Figure 1 An example of a radio frame structure used in a wireless communication system is illustrated.

[0065] refer to Figure 1 , a radio frame (or radio frame) used in a 3GPP NR system may have a length of 10 ms (Δf max N f / 100)*T c ). In addition, a radio frame includes 10 subframes (SFs) of equal size. Here, Δf max =480*10 3 Hz,N f =4096,T c =1 / (Δf ref *N f,ref ), Δf ref =15*10 3 Hz, and N f,ref =2048. Numbers from 0 to 9 can be respectively assigned to 10 subframes within a radio frame. Each subframe has a length of 1 ms and can include one or more time slots according to the subcarrier spacing. More specifically, in the 3GPP NR system, the subcarrier spacing that can be used is 15*2 μ kHz, and μ can have values ​​of μ=0, 1, 2, 3, 4 as subcarrier spacing configurations. That is, 15kHz, 30kHz, 60kHz, 120kHz, and 240kHz can be used for subcarrier spacing. A subframe with a length of 1ms can include 2 μ In this case, the length of each time slot is 2 -μ ms. From 0 to 2 μ-1 The numbers can be assigned to the 2 μ In addition, 0 to 10*2 μ Numbers of -1 may be respectively allocated to time slots within a subframe. Time resources may be distinguished by at least one of a radio frame number (also referred to as a radio frame index), a subframe number (also referred to as a subframe index), and a time slot number (or a time slot index).

[0066] Figure 2An example of a downlink (DL) / uplink (UL) time slot structure in a wireless communication system is illustrated. In particular, Figure 2 The structure of the resource grid of the 3GPP NR system is shown.

[0067] There is one resource grid per antenna port. Figure 2 , a time slot includes multiple orthogonal frequency division multiplexing (OFDM) symbols in the time domain and multiple resource blocks (RBs) in the frequency domain. OFDM symbol also means a symbol section. Unless otherwise specified, OFDM symbol may be simply referred to as symbol. One RB includes 12 consecutive subcarriers in the frequency domain. Figure 2 , the signal transmitted from each time slot can be composed of N size,μ grid,x *N RB sc subcarriers and N slot symb Here, when the signal is a DL signal, x=DL, and when the signal is a UL signal, x=UL. N size,μ grid,x represents the number of resource blocks (RBs) that make up μ (x is DL or UL) according to the subcarrier spacing, and N slot symb N represents the number of OFDM symbols in a time slot. RB sc is the number of subcarriers that make up one RB and N RB sc = 12. Depending on the multiple access scheme, an OFDM symbol may be called a cyclic shifted OFDM (CP-OFDM) symbol or a discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol.

[0068] The number of OFDM symbols included in one slot may vary depending on the length of the cyclic prefix (CP). For example, in the case of a normal CP, one slot includes 14 OFDM symbols, but in the case of an extended CP, one slot may include 12 OFDM symbols. In a specific embodiment, the extended CP may be used only with a 60kHz subcarrier spacing. Figure 2 In the embodiment, for the convenience of description, as an example, one time slot is configured with 14 OFDM symbols, but the embodiments of the present invention can be applied in a similar manner to time slots with different numbers of OFDM symbols. Figure 2 , each OFDM symbol includes N size ,μ grid,x *N RB scsubcarriers. The types of subcarriers can be divided into data subcarriers for data transmission, reference signal subcarriers for transmitting reference signals, and guard bands. The carrier frequency is also called the center frequency (fc).

[0069] An RB can be composed of N RB sc For reference, a resource configured with one OFDM symbol and one subcarrier is called a resource element (RE) or tone. Therefore, one RB can be configured with N slot symb *N RB sc rc resource elements. Each resource element in the resource grid can be uniquely defined by a pair of indices (k, l) in a time slot. k can be a random number from 0 to N in the frequency domain. size,μ grid,x *N RB sc –1 assigned index, and l can be from 0 to N in the time domain slot symb –1 Assigned index.

[0070] In order for a UE to receive or send signals from or to a base station, the UE's time / frequency may be synchronized with that of the base station. This is because when the base station and the UE are synchronized, the UE can determine the time and frequency parameters required to demodulate DL signals and send UL signals at the correct time.

[0071] Each symbol of a radio frame used in a time division duplex (TDD) or unpaired spectrum may be configured with at least one of a DL symbol, a UL symbol, and a flexible symbol. A radio frame that may be used as a DL carrier in a frequency division duplex (FDD) or paired spectrum may be configured with a DL symbol or a flexible symbol, while a radio frame used as a UL carrier may be configured with a UL symbol or a flexible symbol. In a DL symbol, DL transmission is possible, but UL transmission is not possible. In a UL symbol, UL transmission is possible, but DL transmission is not possible. A flexible symbol may be determined to be used as DL or UL according to a signal.

[0072] Information about the type of each symbol, that is, information indicating any one of a DL symbol, a UL symbol, and a flexible symbol, may be configured with a cell-specific or common radio resource control (RRC) signal. In addition, information about the type of each symbol may be additionally configured with a UE-specific or dedicated RRC signal. The base station notifies, by using a cell-specific RRC signal, i) the period of the cell-specific time slot configuration, ii) the number of time slots having only DL symbols from the beginning of the period of the cell-specific time slot configuration, iii) the number of DL symbols starting from the first symbol of the time slot immediately following the time slot having only DL symbols; iv) the number of time slots having only UL symbols starting from the end of the period of the cell-specific time slot configuration; and v) the number of UL symbols starting from the last symbol of the time slot immediately before the time slot having only UL symbols. Here, a symbol that is not configured with any of the UL symbol and the DL symbol is a flexible symbol.

[0073] When information about the symbol type is configured with a UE-specific RRC signal, the base station may signal whether the flexible symbol is a DL symbol or a UL symbol in the cell-specific RRC signal. In this case, the UE-specific RRC signal cannot change the DL symbol or UL symbol configured with the cell-specific RRC signal to another symbol type. The UE-specific RRC signal may signal the N of the corresponding time slot for each time slot. slot symb The number of DL symbols among the symbols, and the N of the corresponding time slot slot symb The number of UL symbols among the symbols. In this case, the DL symbols of the time slot can be continuously configured with the first symbol to the i-th symbol of the time slot. In addition, the UL symbols of the time slot can be continuously configured with the j-th symbol to the last symbol of the time slot (where i < j). In the time slot, the symbol that is not configured with any of the UL symbol and the DL symbol is a flexible symbol.

[0074] The type of symbol configured with the above RRC signal may be referred to as a semi-static DL / UL configuration. In a semi-static DL / UL configuration previously configured with an RRC signal, a flexible symbol may be indicated by a DL symbol, a UL symbol, or a flexible symbol through dynamic slot format information (SFI) sent on a physical DL control channel (PDCCH). In this case, a DL symbol or UL symbol configured with an RRC signal will not be changed to another symbol type. Table 1 illustrates the dynamic SFI that the base station may indicate to the UE.

[0075] [Form 1]

[0076]

[0077] In Table 1, D represents a DL symbol, U represents a UL symbol, and X represents a flexible symbol. As shown in Table 1, a maximum of two DL / UL switchings may be allowed in one slot.

[0078] Figure 3 is a diagram for explaining physical channels used in a 3GPP system (e.g., NR) and a typical signal transmission method using the physical channels.

[0079] If the power of the UE is turned on or the UE resides in a new cell, the UE performs an initial cell search (S101). Specifically, the UE may be synchronized with the BS in the initial cell search. To this end, the UE may receive a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) from the base station to synchronize with the base station and obtain information such as a cell ID. Thereafter, the UE may receive a physical broadcast channel from the base station and obtain broadcast information in the cell.

[0080] After completing the initial cell search, the UE receives a physical downlink shared channel (PDSCH) according to a physical downlink control channel (PDCCH) and information in the PDCCH, so that the UE can obtain more specific system information than that obtained through the initial cell search (S102).

[0081] When the UE initially accesses the base station or does not have radio resources for signal transmission, the UE may perform a random access procedure on the base station (operations S103 to S106). First, the UE may send a preamble through a physical random access channel (PRACH) (S103), and receive a response message for the preamble from the base station through a PDCCH and a corresponding PDSCH (S104). When the UE receives a valid random access response message, the UE sends data including an identifier of the UE, etc. to the base station through a physical uplink shared channel (PUSCH) indicated by a UL grant sent from the base station by the PDCCH (S105). Next, the UE waits to receive the PDCCH as an indication of the base station for conflict resolution. If the UE successfully receives the PDCCH through the UE's identifier (S106), the random access procedure terminates.

[0082] After the above process, the UE receives PDCCH / PDSCH (S107) and sends a physical uplink shared channel (PUSCH) / physical uplink control channel (PUCCH) (S108) as a regular UL / DL signal transmission process. In particular, the UE can receive downlink control information (DCI) through the PDCCH. The DCI may include control information, such as resource allocation information for the UE. In addition, the format of the DCI may vary depending on the intended use. The uplink control information (UCI) sent by the UE to the base station through the UL includes DL / UL ACK / NACK signals, channel quality indicators (CQI), precoding matrix indexes (PMI), rank indicators (RI), and the like. Here, CQI, PMI, and RI may be included in channel state information (CSI). In a 3GPP NR system, the UE can send control information such as the above-mentioned HARQ-ACK and CSI through PUSCH and / or PUCCH.

[0083] Figure 4 Illustration of SS / PBCH blocks used for initial cell access in a 3GPP NR system.

[0084] When the power is turned on or when accessing a new cell is desired, the UE may acquire time and frequency synchronization with the cell and perform an initial cell search procedure. The UE may detect the physical cell identifier N of the cell during the cell search procedure. cell ID To this end, the UE may receive a synchronization signal, such as a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), from the base station and synchronize with the base station. In this case, the UE may obtain information such as a cell identifier (ID).

[0085] refer to Figure 4 a, the synchronization signal (SS) will be described in more detail. The synchronization signal can be classified into PSS and SSS. PSS can be used to obtain time domain synchronization and / or frequency domain synchronization, such as OFDM symbol synchronization and time slot synchronization. SSS can be used to obtain frame synchronization and cell group ID. Figure 4a and Table 2, the SS / PBCH block can be configured with 20 consecutive RBs (=240 subcarriers) on the frequency axis, and can be configured with 4 consecutive OFDM symbols on the time axis. In this case, in the SS / PBCH block, the PSS is sent in the first OFDM symbol through the 56th to 182nd subcarriers, and the SSS is sent in the third OFDM symbol. Here, the lowest subcarrier index of the SS / PBCH block is numbered from 0. In the first OFDM symbol in which the PSS is sent, the base station does not send signals through the remaining subcarriers (i.e., the 0th to 55th and 183rd to 239th subcarriers). In addition, in the third OFDM symbol in which the SSS is sent, the base station does not send signals through the 48th to 55th and 183rd to 191st subcarriers. The base station sends the physical broadcast channel (PBCH) through the remaining REs other than the above-mentioned signals in the SS / PBCH block.

[0086] [Table 2]

[0087]

[0088] The combination of the three PSS and SSS allows a total of 1008 unique physical layer cell IDs to be grouped into 336 physical layer cell identifier groups, each group including three unique identifiers. Specifically, each physical layer cell ID is only part of one physical layer cell identifier group. cell ID =3N (1) ID +N (2) ID The physical layer cell identifier group may be represented by an index N ranging from 0 to 335. (1) ID and an index N ranging from 0 to 2 indicating a physical layer identifier in the physical layer cell identifier group (2) ID The UE can detect the PSS and identify one of three unique physical layer identifiers. In addition, the UE can detect the SSS and identify one of the 336 physical layer cell IDs associated with the physical layer identifier. In this case, the sequence d of the PSS PSS (n) are as follows.

[0089] d PSS (n) = 1-2x(m)

[0090]

[0091] 0≤n<127

[0092] Furthermore, x(i+7)=(x(i+4)+x(i))mod2 and is given as [x(6) x(5) x(4) x(3) x(2) x(1) x(0)]=[1 1 1 0 1 1 0]

[0093] In addition, the sequence d of SSS SSS (n) are as follows.

[0094] d SSS (n) = [1-2x 0 ((n+m 0 )mod127)I1-2x 1 ((n+m 1 )mod127)]

[0095] Here, and is given as

[0096] [x 0 (6) x 0 (5) x 0 (4) x 0 (3) x 0 (2) x 0 (1) x 0 (0)] = [0 0 0 0 0 0 1]

[0097] [x 1 (6) x 1 (5) x 1 (4) x 1 (3) x 1 (2) x 1 (1) x 1 (0)] = [0 0 0 0 0 0 1]

[0098] A radio frame having a length of 10 ms may be divided into two half frames having a length of 5 ms. Figure 4b, the time slot in which the SS / PBCH block is sent in each half frame will be described. The time slot in which the SS / PBCH block is sent can be any of cases A, B, C, D and E. In case A, the subcarrier spacing is 15kHz, and the starting time point of the SS / PBCH block is the ({2, 8}+14*n)th symbol. In this case, n=0 or 1 at a carrier frequency of 3GHz or less. In addition, at a carrier frequency higher than 3GHz and lower than 6GHz, it may be n=0, 1, 2, 3. In case B, the subcarrier spacing is 30kHz, and the starting time point of the SS / PBCH block is {4, 8, 16, 20}+28*n. In this case, at a carrier frequency of 3GHz or less, n=0. In addition, at a carrier frequency higher than 3GHz and lower than 6GHz, it may be n=0, 1. In case C, the subcarrier spacing is 30kHz, and the start time point of the SS / PBCH block is the ({2, 8}+14*n)th symbol. In this case, n=0 or 1 at a carrier frequency of 3GHz or lower. In addition, at a carrier frequency higher than 3GHz and lower than 6GHz, it may be n=0, 1, 2, 3. In case D, the subcarrier spacing is 120kHz, and the start time point of the SS / PBCH block is the ({4, 8, 16, 20}+28*n)th symbol. In this case, at a carrier frequency of 6GHz or higher, n=0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18. In case E, the subcarrier spacing is 240kHz, and the start time point of the SS / PBCH block is the ({8, 12, 16, 20, 32, 36, 40, 44}+56*n)th symbol. In this case, at a carrier frequency of 6 GHz or higher, n=0, 1, 2, 3, 5, 6, 7, 8.

[0099] Figure 5 Figure 1 shows a process for transmitting control information and control channels in a 3GPP NR system. Figure 5a, the base station may add a cyclic redundancy check (CRC) masked with a radio network temporary identifier (RNTI) (e.g., an XOR operation) to control information (e.g., downlink control information (DCI)) (S202). The base station may scramble the CRC using an RNTI value determined according to the purpose / target of each control information. The common RNTI used by one or more UEs may include at least one of a system information RNTI (SI-RNTI), a paging RNTI (P-RNTI), a random access RNTI (RA-RNTI), and a transmit power control RNTI (TPC-RNTI). In addition, the UE-specific RNTI may include at least one of a cell temporary RNTI (C-RNTI) and a CS-RNTI. Thereafter, the base station may perform rate matching according to the amount of resources used for PDCCH transmission after performing channel coding (e.g., polarity coding) (S206). Thereafter, the base station may multiplex DCI according to a PDCCH structure based on a control channel element (CCE) (S208). In addition, the base station may apply additional processing (S210) such as scrambling, modulation (e.g., QPSK), interleaving, etc. to the multiplexed DCI, and then map the DCI to the resource to be transmitted. CCE is a basic resource unit for PDCCH, and one CCE may include multiple (e.g., six) resource element groups (REGs). One REG may be configured with multiple (e.g., 12) REs. The number of CCEs used for one PDCCH may be defined as an aggregation level. In a 3GPP NR system, an aggregation level of 1, 2, 4, 8, or 16 may be used. Figure 5 b is a schematic diagram related to CCE aggregation levels and multiplexing of PDCCHs, and illustrates types of CCE aggregation levels for one PDCCH and CCEs transmitted in the control region according thereto.

[0100] Figure 6 Illustration of a control resource set (CORESET) where a physical downlink control channel (PUCCH) can be sent in a 3GPP NR system.

[0101] CORESET is a time-frequency resource in which PDCCH (i.e., a control signal for UE) is transmitted. In addition, the search space described later can be mapped to one CORESET. Therefore, the UE can monitor the time-frequency domain designated as the CORESET instead of monitoring all frequency bands for PDCCH reception, and decode the PDCCH mapped to the CORESET. The base station can configure one or more CORESETs for each cell to the UE. The CORESET can be configured with up to three consecutive symbols on the time axis. In addition, the CORESET can be configured in units of six consecutive PRBs on the frequency axis. Figure 5In the embodiment of FIG. 1 , CORESET#1 is configured with continuous PRBs, and CORESET#2 and CORESET#3 are configured with discontinuous PRBs. A CORESET can be located in any symbol in a time slot. For example, in Figure 5 In the embodiment of the present invention, CORESET#1 starts from the first symbol of the time slot, CORESET#2 starts from the fifth symbol of the time slot, and CORESET#9 starts from the ninth symbol of the time slot.

[0102] Figure 7 A method for setting a PUCCH search space in a 3GPP NR system is illustrated.

[0103] In order to send the PDCCH to the UE, each CORESET may have at least one search space. In an embodiment of the present disclosure, the search space is a set of all time-frequency resources (hereinafter, PDCCH candidates) through which the PDCCH of the UE can be sent. The search space may include a common search space that requires UEs of 3GPP NR to search together, and a terminal-specific or UE-specific search space that requires a specific UE to search. In the common search space, the UE can monitor the set PDCCH so that all UEs in the cell belonging to the same base station search together. In addition, a UE-specific search space can be set for each UE so that the UE monitors the PDCCH allocated to each UE at different search space positions according to the UE. In the case of a UE-specific search space, due to the limited control area in which the PDCCH can be allocated, the search space between UEs can be partially overlapped and allocated. Monitoring the PDCCH includes blind decoding of the PDCCH candidates in the search space. When the blind decoding is successful, it can be expressed that the PDCCH is detected / received (successfully), and when the blind decoding fails, it can be expressed that the PDCCH is not detected / received or not successfully detected / received.

[0104] For ease of explanation, a PDCCH that is scrambled with a group common (GC) RNTI previously known to one or more UEs so that DL control information is sent to one or more UEs is referred to as a group common (GC) PDCCH or a common PDCCH. In addition, a PDCCH that is scrambled with a specific terminal RNTI that is already known to a specific UE so that UL scheduling information or DL ​​scheduling information is sent to a specific UE is referred to as a specific UE PDCCH. The common PDCCH may be included in a common search space, and the UE-specific PDCCH may be included in a common search space or a UE-specific PDCCH.

[0105] The base station may signal information about resource allocation of a paging channel (PCH) and a downlink shared channel (DL-SCH) as transport channels (i.e., DL grant) or information about resource allocation of an uplink shared channel (UL-SCH) and a hybrid automatic repeat request (HARQ) (i.e., UL grant) to each UE or UE group through the PDCCH. The base station may send a PCH transport block and a DL-SCH transport block through the PDSCH. The base station may send data that does not include specific control information or specific service data through the PDSCH. In addition, the UE may receive data that does not include specific control information or specific service data through the PDSCH.

[0106] The base station can include information about which UE (one or more UEs) the PDSCH data is sent to and how the corresponding UE receives and decodes the PDSCH data in the PDCCH, and send the PDCCH. For example, assume that the DCI sent on a specific PDCCH is a CRC masked with an RNTI of "A", and the DCI indicates that the PDSCH is allocated to a radio resource (e.g., frequency position) of "B" and indicates the transmission format information of "C" (e.g., transport block size, modulation scheme, coding information, etc.). The UE monitors the PDCCH using the RNTI information that the UE has. In this case, if there is a UE that performs blind decoding of the PDCCH using the "A" RNTI, the UE receives the PDCCH and receives the PDSCH indicated by "B" and "C" through the received PDCCH information.

[0107] Table 3 shows an embodiment of a physical uplink control channel (PUCCH) used in a wireless communication system.

[0108] [Table 3]

[0109]

[0110] PUCCH can be used to transmit the following UL control information (UCI).

[0111] - Scheduling Request (SR): information for requesting UL UL-SCH resources.

[0112] -HARQ-ACK: A response to the PDCCH (indicating a DL SPS release) and / or a response to a DL transport block (TB) on the PDSCH. HARQ-ACK indicates whether the information sent on the PDCCH or PDSCH is received. The HARQ-ACK response includes a positive ACK (simple ACK), a negative ACK (hereinafter referred to as NACK), a discontinuous transmission (DTX), or NACK / DTX. Here, the term HARQ-ACK is used in a mixed manner with HARQ-ACK / NACK and ACK / NACK. Generally, ACK can be represented by a bit value of 1, while NACK can be represented by a bit value of 0.

[0113] - Channel State Information (CSI): Feedback information about DL channels. The UE generates feedback information about DL channels based on the CSI Reference Signal (RS) sent by the base station. Feedback information related to Multiple Input Multiple Output (MIMO) includes Rank Indicator (RI) and Precoding Matrix Indicator (PMI). According to the information indicated by the CSI, the CSI can be divided into CSI Part 1 and CSI Part 2.

[0114] In the 3GPP NR system, five PUCCH formats can be used to support various service scenarios, various channel environments, and frame structures.

[0115] PUCCH format 0 is a format capable of transmitting 1-bit or 2-bit HARQ-ACK information or SR. PUCCH format 0 can be transmitted through one or two OFDM symbols on the time axis and one PRB on the frequency axis. When PUCCH format 0 is transmitted in two OFDM symbols, the same sequence on the two symbols can be transmitted through different RBs. In this case, the sequence can be a sequence (CS) cyclically shifted from the basic sequence used in PUCCH format 0. As a result, the UE can obtain frequency diversity gain. In more detail, the UE can select the optimal frequency diversity gain according to the M bit UCI(M bit =1 or 2) to determine the cyclic shift (CS) value m cs In addition, the CS value m can be calculated by cs The cyclic shift sequence is mapped to one OFDM symbol and 12 REs of one RB to transmit a basic sequence of length 12. When the number of cyclic shifts available to the UE is 12 and M bit =1, the 1-bit UCI 0 and 1 can be mapped to two cyclic shift sequences, which have a difference of 6 in cyclic shift value. In addition, when M bit =2, the 2-bit UCI 00, 01, 11 and 10 may be mapped to four cyclic shift sequences having a difference of 3 in the cyclic shift value, respectively.

[0116] PUCCH format 1 can convey 1-bit or 2-bit HARQ-ACK information or SR. PUCCH format 1 can be transmitted through continuous OFDM symbols on the time axis and one PRB on the frequency axis. Here, the number of OFDM symbols occupied by PUCCH format 1 can be one of 4 to 14. More specifically, M bit =1 UCI is modulated by BPSK. The UE can use quadrature phase shift keying (QPSK) to modulate M bit =2 UCI. The signal is obtained by multiplying the modulated complex-valued symbol d(0) by a sequence of length 12. In this case, the sequence can be the basic sequence for PUCCH format 0. The UE spreads the even-numbered OFDM symbols of PUCCH format 1 allocated by the time axis orthogonal cover code (OCC) to send the obtained signal. PUCCH format 1 determines the maximum number of different UEs multiplexed in one RB according to the length of the OCC used. The demodulation reference signal (DMRS) can be spread together with the OCC and mapped to the odd-numbered OFDM symbols of PUCCH format 1.

[0117] PUCCH format 2 can convey more than 2 bits of UCI. PUCCH format 2 can be transmitted through one or two OFDM symbols on the time axis and one or more RBs on the frequency axis. When PUCCH format 2 is transmitted in two OFDM symbols, the sequences transmitted in different RBs through the two OFDM symbols can be identical to each other. Here, the sequence can be a plurality of modulated complex-valued symbols d(0), ..., d(M symbol -1). Here, M symbol It can be M bit / 2. Through this, the UE can obtain frequency diversity gain. More specifically, M bit UCI (M bit >2) RBs that are bit-level scrambled, QPSK modulated, and mapped to one or two OFDM symbols. Here, the number of RBs can be one of 1 to 16.

[0118] PUCCH format 3 or PUCCH format 4 can convey more than 2 bits of UCI. PUCCH format 3 or PUCCH format 4 can be transmitted through continuous OFDM symbols on the time axis and one PRB on the frequency axis. The number of OFDM symbols occupied by PUCCH format 3 or PUCCH format 4 can be one of 4 to 14. Specifically, the UE modulates M with π / 2 binary phase shift keying (BPSK) or QPSK. bit UCI of Mbit (Mbit>2) to generate complex-valued symbols d(0) to d(Mbit) symb -1). Here, when π / 2-BPSK is used, M symb =Mbit , and when using QPSK, M symb =M bit / 2. The UE may not apply block unit extension to PUCCH format 3. However, the UE may apply block unit extension to one RB (i.e., 12 subcarriers) using a PreDFT-OCC of length 12, so that PUCCH format 4 can have two or four multiplexing capabilities. The UE performs transmit precoding (or DFT precoding) on ​​the extended signal and maps it to each RE to transmit the extended signal.

[0119] In this case, the number of RBs occupied by PUCCH format 2, PUCCH format 3, or PUCCH format 4 may be determined according to the length of UCI transmitted by the UE and the maximum coding rate. When the UE uses PUCCH format 2, the UE may transmit HARQ-ACK information and CSI information together through the PUCCH. When the number of RBs that the UE can transmit is greater than the maximum number of RBs that can be used by PUCCH format 2, PUCCH format 3, or PUCCH format 4, the UE may transmit only the remaining UCI information without transmitting some UCI information according to the priority of the UCI information.

[0120] PUCCH format 1, PUCCH format 3, or PUCCH format 4 may be configured by RRC signaling to indicate frequency hopping in a time slot. When frequency hopping is configured, the index of the RB to be frequency hopped may be configured with an RRC signal. When PUCCH format 1, PUCCH format 3, or PUCCH format 4 is transmitted through N OFDM symbols on the time axis, the first hop may have a lower limit of (N / 2) OFDM symbols and the second hop may have an upper limit of (N / 2) OFDM symbols.

[0121] PUCCH format 1, PUCCH format 3 or PUCCH format 4 can be configured to be repeatedly transmitted in multiple time slots. In this case, K time slots for repeated transmission of PUCCH can be configured by RRC signaling. The repeatedly transmitted PUCCH must start from an OFDM symbol at a constant position in each time slot and have a constant length. When one OFDM symbol among the OFDM symbols of the time slot in which the UE should send PUCCH is indicated as a DL symbol by RRC signaling, the UE may not send PUCCH in the corresponding time slot and delay the transmission of PUCCH to the next time slot to send PUCCH.

[0122] Meanwhile, in the 3GPP NR system, the UE can perform transmission / reception using a bandwidth equal to or less than the bandwidth of the carrier (or cell). To this end, the UE can receive a bandwidth portion (BWP) of a continuous bandwidth configured with some bandwidths in the carrier bandwidth. A UE operating according to TDD or in an unpaired spectrum can receive up to four DL / UL BWP pairs in one carrier (or cell). In addition, the UE can activate one DL / UL BWP pair. A UE operating according to FDD or in a paired spectrum can receive up to four DL BWPs on a DL carrier (or cell) and up to four ULBWPs on a UL carrier (or cell). The UE can activate one DL BWP and one UL BWP for each carrier (or cell). In addition to the activated BWP, the UE may not perform reception or transmission in the time-frequency resources. The activated BWP may be referred to as an active BWP.

[0123] The base station may indicate the activated BWP among the BWPs configured by the UE through downlink control information (DCI). The BWP indicated by the DCI is activated, and the other configured BWPs are deactivated. In a carrier (or cell) operating in TDD, the base station may include a bandwidth part indicator (BPI) in the DCI for scheduling PDSCH or PUSCH, which indicates the BWP to be activated to change the DL / UL BWP pair of the UE. The UE may receive the DCI for scheduling PDSCH or PUSCH, and may identify the DL / UL BWP pair activated based on the BPI. For a DL carrier (or cell) operating in FDD, the base station may include a BPI indicating the BWP to be activated in the DCI for scheduling PDSCH to change the DL BWP of the UE. For a UL carrier (or cell) operating in FDD, the base station may include a BPI indicating the BWP to be activated in the DCI for scheduling PUSCH to change the UL BWP of the UE.

[0124] Figure 8 is a conceptual diagram illustrating carrier aggregation.

[0125] Carrier aggregation is a method in which a UE uses multiple frequency blocks or cells configured with UL resources (or component carriers) and / or DL ​​resources (or component carriers) (logically) as one large logical frequency band so that the wireless communication system uses a wider frequency band. One component carrier may also be referred to as a primary cell (PCell) or a secondary cell (SCell) or a primary SCell (PScell). However, hereinafter, for ease of description, the term "component carrier" is used.

[0126] refer to Figure 8As an example of a 3GPP NR system, the entire system band may include up to 16 component carriers, and each component carrier may have a bandwidth of up to 400 MHz. A component carrier may include one or more physically contiguous subcarriers. Figure 8 In the figure, each component carrier is shown to have the same bandwidth, which is only an example, and each component carrier may have a different bandwidth. Moreover, although each component carrier is shown as being adjacent to each other on the frequency axis, the drawings are shown in a logical concept, and each component carrier may be physically adjacent to each other or may be spaced apart.

[0127] A different center frequency can be used for each component carrier. Alternatively, a common center frequency can be used in physically adjacent component carriers. Figure 8 In the embodiment of the present invention, all component carriers are physically adjacent, and the center frequency A can be used in all component carriers. In addition, assuming that the component carriers are not physically adjacent to each other, the center frequency A and the center frequency B can be used in each component carrier.

[0128] When the entire system frequency band is extended by carrier aggregation, the frequency band used for communication with each UE can be defined in units of component carriers. UE A can use 100 MHz as the entire system frequency band and perform communication using all five component carriers. UE B 1 ~B 5 Only 20MHz bandwidth can be used and one component carrier is used for communication. 1 and C 2 A 40 MHz bandwidth can be used and two component carriers can be used for communication. The two component carriers may be logically / physically adjacent or non-adjacent. 1 represents the case where two non-adjacent component carriers are used and UE C 2 Represents the case of using two adjacent component carriers.

[0129] Fig. 9 is a diagram for explaining signal carrier communication and multi-carrier communication. In particular, Fig. 9 a shows a single carrier subframe structure and Fig. 9 b shows a multi-carrier subframe structure.

[0130] refer to Fig. 9 a. In the FDD mode, a general wireless communication system can perform data transmission or reception through a DL frequency band and a UL frequency band corresponding thereto. In another specific embodiment, in the TDD mode, the wireless communication system can divide a radio frame into a UL time unit and a DL time unit in the time domain, and perform data transmission or reception through the UL / DL time unit. Fig. 9b. Three 20MHz component carriers (CCs) can be aggregated into each of UL and DL so that a bandwidth of 60MHz can be supported. Each CC may be adjacent or non-adjacent to each other in the frequency domain. Fig. 9 b shows the case where the bandwidth of the UL CC and the bandwidth of the DL CC are the same and symmetrical, but the bandwidth of each CC can be determined independently. In addition, asymmetric carrier aggregation with different numbers of UL CCs and DL CCs is possible. The DL / UL CC allocated / configured to a specific UE through RRC can be called a serving DL / UL CC for the specific UE.

[0131] The base station can perform communication with the UE by activating some or all of the UE's serving CCs or deactivating some CCs. The base station can change the CC to be activated / deactivated, and can change the number of CCs to be activated / deactivated. If the base station allocates CC allocations available for the UE as cell-specific or UE-specific, at least one of the allocated CCs can be deactivated unless the CC allocation for the UE is completely reconfigured or the UE is switched. One CC that is not deactivated by the UE is called a primary CC (PCC) or a primary cell (PCell), and a CC that the base station can freely activate / deactivate is called a secondary CC (SCC) or a secondary cell (SCell).

[0132] At the same time, 3GPP NR uses the concept of cells to manage radio resources. A cell is defined as a combination of DL resources and UL resources, that is, a combination of DL CCs and UL CCs. A cell can be configured with DL resources alone, or a combination of DL resources and UL resources. When carrier aggregation is supported, the link between the carrier frequency of DL resources (or DL ​​CCs) and the carrier frequency of UL resources (or UL CCs) can be indicated by system information. The carrier frequency refers to the center frequency of each cell or CC. The cell corresponding to the PCC is called PCell, and the cell corresponding to the SCC is called SCell. The carrier corresponding to the PCell in the DL is the DL PCC, and the carrier corresponding to the PCell in the UL is the UL PCC. Similarly, the carrier corresponding to the SCell in the DL is the DL SCC, and the carrier corresponding to the SCell in the UL is the UL SCC. Depending on the capabilities of the UE, the serving cell can be configured with one PCell and zero or more SCells. For a UE that is in the RRC_CONNECTED state but is not configured for carrier aggregation or does not support carrier aggregation, there is only one serving cell configured with only the PCell.

[0133] As described above, the term "cell" used in carrier aggregation is distinguished from the term "cell" referring to a specific geographical area where communication services are provided by one base station or one antenna group. That is, one component carrier may also be referred to as a scheduling cell, a scheduled cell, a primary cell (PCell), a secondary cell (SCell), or a primary SCell (PScell). However, in order to distinguish between a cell referring to a certain geographical area and a cell of carrier aggregation, in the present disclosure, a cell of carrier aggregation is referred to as a CC, and a cell of a geographical area is referred to as a cell.

[0134] Fig.10 : is a schematic diagram showing an example in which cross-carrier scheduling technology is applied. When cross-carrier scheduling is set, the control channel sent through the first CC can use the carrier indicator field (CIF) to schedule the data channel sent through the first CC or the second CC. The CIF is included in the DCI. In other words, a scheduling cell is set, and the DL grant / UL grant sent in the PDCCH area of ​​the scheduling cell schedules the PDSCH / PUSCH of the scheduled cell. That is, there are search areas for multiple component carriers in the PDCCH area of ​​the scheduling cell. The PCell can basically be a scheduling cell, and a specific SCell can be designated as a scheduling cell by the upper layer.

[0135] exist Fig.10 In the embodiment of the present invention, it is assumed that three DL CCs are merged. Here, it is assumed that DL component carrier #0 is DL PCC (or PCell), and DL component carrier #1 and DL component carrier #2 are DL SCC (or SCell). In addition, it is assumed that DL PCC is set as PDCCH monitoring CC. When cross-carrier scheduling is not configured by UE-specific (or UE group-specific or cell-specific) higher signaling, CIF is disabled, and each DL CC can only send PDCCH for scheduling PDSCH of DL CC without CIF according to NR PDCCH rules (non-cross-carrier scheduling, self-carrier scheduling). At the same time, if cross-carrier scheduling is configured by UE-specific (or UE group-specific or cell-specific) higher layer signaling, CIF is enabled, and a specific CC (e.g., DL PCC) can send not only PDCCH for scheduling PDSCH of DL CC A using CIF but also PDCCH for scheduling PDSCH of another CC (cross-carrier scheduling). On the other hand, PDCCH is not sent in another DL CC. Therefore, the UE monitors the PDCCH not including the CIF to receive the PDSCH scheduled by the self-carrier, or monitors the PDCCH including the CIF to receive the PDSCH scheduled by the cross-carrier, depending on whether the cross-carrier scheduling is configured for the UE.

[0136] on the other hand, Fig. 9 and Fig.10The subframe structure of the 3GPP LTE-A system is shown in the figure, and the same or similar configuration can be applied to the 3GPP NR system. However, in the 3GPP NR system, Fig. 9 and Fig.10 The subframes may be replaced by time slots.

[0137] Fig.11 is a block diagram showing the configuration of a UE and a base station according to an embodiment of the present disclosure. In an embodiment of the present disclosure, the UE can be implemented by various types of wireless communication devices or computing devices that are guaranteed to be portable and mobile. The UE may be referred to as a user equipment (UE), a station (STA), a mobile subscriber (MS), etc. In addition, in an embodiment of the present disclosure, the base station controls and manages cells (e.g., macro cells, femto cells, micro cells, etc.) corresponding to the service area, and performs functions such as signal transmission, channel designation, channel monitoring, self-diagnosis, relaying, etc. The base station may be referred to as a next generation node B (gNB) or an access point (AP).

[0138] As shown in the drawings, the UE 100 according to an embodiment of the present disclosure may include a processor 110 , a communication module 120 , a memory 130 , a user interface 140 , and a display unit 150 .

[0139] First, the processor 110 may execute various instructions or programs within the UE 100 and process data. In addition, the processor 110 may control the entire operation of each unit including the UE 100, and may control the transmission / reception of data between the units. Here, the processor 110 may be configured to perform operations according to the embodiments described in the present disclosure. For example, the processor 110 may receive time slot configuration information, determine the time slot configuration based on the time slot configuration information, and perform communication according to the determined time slot configuration.

[0140] Next, the communication module 120 may be an integrated module that performs wireless communication using a wireless communication network and wireless LAN access using a wireless LAN. To this end, the communication module 120 may include a plurality of network interface cards (NICs) in an internal or external form, such as cellular communication interfaces 121 and 122 and an unlicensed band communication interface 123. In the drawings, the communication module 120 is shown as an integrally integrated module, but unlike the drawings, each network interface card may be independently arranged according to a circuit configuration or a purpose.

[0141] The cellular communication interface 121 may send or receive a radio signal with at least one of the base station 200, the external device, and the server by using a mobile communication network, and provide a cellular communication service in a first frequency band based on an instruction from the processor 110. According to an embodiment, the cellular communication interface 121 may include at least one NIC module using a frequency band less than 6 GHz. At least one NIC module of the cellular communication interface 121 may independently perform cellular communication with at least one of the base station 200, the external device, and the server according to a cellular communication standard or protocol in a frequency band less than 6 GHz supported by a corresponding NIC module.

[0142] The cellular communication interface 122 may send or receive a radio signal with at least one of the base station 200, the external device, and the server by using a mobile communication network, and provide a cellular communication service in the second frequency band based on an instruction from the processor 110. According to one embodiment, the cellular communication interface 122 may include at least one NIC module using a frequency band greater than 6 GHz. At least one NIC module of the cellular communication interface 122 may independently perform cellular communication with at least one of the base station 200, the external device, and the server according to a cellular communication standard or protocol in a frequency band of 6 GHz or more supported by a corresponding NIC module.

[0143] The unlicensed band communication interface 123 sends or receives a radio signal with at least one of the base station 200, the external device, and the server by using a third frequency band as an unlicensed frequency band, and provides a communication service of the unlicensed frequency band based on an instruction from the processor 110. The unlicensed band communication interface 123 may include at least one NIC module using an unlicensed frequency band. For example, the unlicensed frequency band may be a frequency band of 2.4 GHz or 5 GHz. At least one NIC module of the unlicensed band communication interface 123 may independently or non-independently perform wireless communication with at least one of the base station 200, the external device, and the server according to an unlicensed frequency band communication standard or a frequency band protocol of a frequency band supported by the corresponding NIC module.

[0144] The memory 130 stores a control program used in the UE 100 and various data therefor. Such a control program may include a prescribed program required for performing wireless communication with at least one of the base station 200, an external device, and a server.

[0145] Next, the user interface 140 includes various input / output devices provided in the UE 100. In other words, the user interface 140 may receive user input using various input devices, and the processor 110 may control the UE 100 based on the received user input. In addition, the user interface 140 may perform output based on instructions from the processor 110 using various output devices.

[0146] Next, the display unit 150 outputs various images on the display screen. The display unit 150 may output various display objects such as content or a user interface executed by the processor 110 based on a control instruction from the processor 110.

[0147] In addition, the base station 200 according to an embodiment of the present disclosure may include a processor 210 , a communication module 220 , and a memory 230 .

[0148] First, the processor 210 may execute various instructions or programs and process internal data of the base station 200. In addition, the processor 210 may control the overall operation of the units in the base station 200 and control data transmission and reception between the units. Here, the processor 210 may be configured to perform operations according to the embodiments described in the present disclosure. For example, the processor 210 may signal a time slot configuration and perform communication according to the signaled time slot configuration.

[0149] Next, the communication module 220 may be an integrated module that performs wireless communication using a wireless communication network and wireless LAN access using a wireless LAN. To this end, the communication module 220 may include a plurality of network interface cards in an internal or external form, such as cellular communication interfaces 221 and 222 and an unlicensed band communication interface 223. In the drawings, the communication module 220 is shown as an integrally integrated module, but unlike the drawings, each network interface card may be independently arranged according to a circuit configuration or purpose.

[0150] The cellular communication interface 221 may send or receive a radio signal with at least one of the base station 100, the external device, and the server by using a mobile communication network, and provide a cellular communication service in a first frequency band based on an instruction from the processor 210. According to an embodiment, the cellular communication interface 221 may include at least one NIC module using a frequency band less than 6 GHz. At least one NIC module of the cellular communication interface 221 may independently perform cellular communication with at least one of the base station 100, the external device, and the server according to a cellular communication standard or protocol in a frequency band less than 6 GHz supported by a corresponding NIC module.

[0151] The cellular communication interface 222 may send or receive a radio signal with at least one of the base station 100, the external device, and the server by using a mobile communication network, and provide a cellular communication service in the second frequency band based on an instruction from the processor 210. According to an embodiment, the cellular communication interface 222 may include at least one NIC module using a frequency band of 6 GHz or higher. At least one NIC module of the cellular communication interface 222 may independently perform cellular communication with at least one of the base station 100, the external device, and the server according to a cellular communication standard or protocol in a frequency band of 6 GHz or higher supported by a corresponding NIC module.

[0152] The unlicensed band communication interface 223 sends or receives a radio signal with at least one of the base station 100, the external device, and the server by using a third frequency band as an unlicensed frequency band, and provides a communication service of the unlicensed frequency band based on an instruction from the processor 210. The unlicensed band communication interface 223 may include at least one NIC module using an unlicensed frequency band. For example, the unlicensed frequency band may be a frequency band of 2.4 GHz or 5 GHz. At least one NIC module of the unlicensed band communication interface 223 may independently or non-independently perform wireless communication with at least one of the base station 100, the external device, and the server according to an unlicensed frequency band communication standard or a frequency band protocol of a frequency band supported by the corresponding NIC module.

[0153] Fig.11 1 is a block diagram illustrating a UE 100 and a base station 200 according to an embodiment of the present disclosure, and the blocks shown respectively are logically divided elements of the device. Therefore, according to the design of the device, the above-mentioned elements of the device can be installed in a single chip or multiple chips. In addition, a part of the configuration of the UE 100, for example, a user interface 140, a display unit 150, etc., can be selectively provided in the UE 100. In addition, if necessary, a user interface 140, a display unit 150, etc. can be additionally provided in the base station 200.

[0154] In the NR system, PUCCH can be divided into long PUCCH and short PUCCH according to the PUCCH format. Here, the symbol period of long PUCCH can be longer than the symbol period of short PUCCH. For example, long PUCCH means a PUCCH format consisting of 4 or more OFDM symbols. In addition, among the above-mentioned PUCCH formats, PUCCH formats 1, 3 and 4 belong to it. In addition, short PUCCH means a PUCCH format consisting of two or smaller OFDM symbols. Among the above-mentioned PUCCH formats, PUCCH formats 0 and 2 belong to it.

[0155] According to an embodiment, the short PUCCH may have one or two symbol periods. In addition, in the short PUCCH, a PUCCH format having a size of 1 RB (ie, 12 REs) for each symbol is referred to as PUCCH format 0. In addition, in the short PUCCH, a PUCCH format having one RB to 16 RBs for each symbol is referred to as PUCCH format 2. For a short PUCCH with two symbol periods, transmission may be performed in different ways using different short PUCCH formats according to the bit size of the UCI to be sent by the UE. For example, the UCI to be sent by the UE may be repeatedly sent at each symbol during two symbol periods for sending the short PUCCH. Alternatively, different UCIs may be sent respectively in two symbol periods for sending the short PUCCH. In this case, it may be configured so that the UE sends time-sensitive information in a second symbol period between two symbol periods for sending the short PUCCH, and sends non-time-sensitive information in a first symbol period between the two symbol periods. By this, processing time in the UE may be ensured for time-sensitive information. In the following, for ease of description, a short PUCCH with one symbol will be basically described, but the present disclosure is not limited thereto. The embodiments about the short PUCCH to be described below may also be applied identically or correspondingly to the short PUCCH consisting of two symbols. The configuration of the time resources and frequency resources allocated to the PUCCH may vary according to the PUCCH format.

[0156] Fig.12 An example of a sequence-based short PUCCH format according to an embodiment of the present disclosure is illustrated. Here, the sequence-based short PUCCH format may be a PUCCH format in which the above-mentioned basic sequence is cyclically shifted (CS) to send different information. In the NR system, the sequence-based short PUCCH format may be the above-mentioned PUCCH formats 0 to Table 3. Hereinafter, unless otherwise specified, the sequence indicates the basic sequence itself or a sequence cyclically shifted from the basic sequence, which is used in a sequence-based short PUCCH format.

[0157] exist Fig.12In the figure, the x-axis represents a plurality of subcarriers in the frequency domain, and the y-axis represents a symbol in the time domain. For example, a sequence-based short PUCCH format may be allocated to a resource including a plurality of REs. In detail, the sequence-based short PUCCH format consists of one or two consecutive symbols (time resources), and a resource (frequency resource) consisting of a plurality of consecutive subcarriers may be allocated to each symbol. Here, the number of a plurality of consecutive subcarriers may be obtained by multiplying the number of RBs by the number of subcarriers per RB. For example, the number of a plurality of consecutive subcarriers may be the number that one RB has. In addition, one RB may be 12 subcarriers. For a sequence-based short PUCCH format, the PUCCH resources may include 12 subcarriers for each symbol.

[0158] Fig.13 An example of a frequency division multiplexing (FDM)-based short PUCCH format in an NR system according to an embodiment of the present disclosure is illustrated. Here, the FDM-based short PUCCH format may be a PUCCH format distinguished by subcarriers of a reference signal (RS) and UCI. For example, in an NR system, the FDM-based short PUCCH format may be the aforementioned PUCCH format 2. Here, a plurality of subcarriers forming the FDM-based short PUCCH format may be mapped to each of the UCI and RS according to a preset ratio. For example, the RS may be mapped to a subcarrier corresponding to 1 / 2, 1 / 3, 1 / 4, or 1 / 6 of the total number of subcarriers forming the PUCCH. Fig.13 The diagram illustrates a short PUCCH format based on FMD when RS overhead indicating a ratio of subcarriers occupied by RSs to all subcarriers is 1 / 2.

[0159] exist Fig.13In the figure, the x-axis represents a plurality of subcarriers in the frequency domain, and the y-axis represents a symbol in the time domain. In more detail, the FDM-based short PUCCH format consists of one or two consecutive symbols (time resources), and resources consisting of a plurality of consecutive subcarriers (frequency resources) may be allocated to each symbol. Here, the number of a plurality of consecutive subcarriers may be obtained by multiplying the number of RBs by the number of subcarriers per RB. For example, unlike the aforementioned sequence-based short PUCCH format, the FDM-based short PUCCH format may consist of one or more RBs for each symbol. In more detail, for the FDM-based short PUCCH format, the PUCCH resources may include, for each symbol, subcarriers that can be occupied by one RB to subcarriers that can be occupied by 16 RBs. According to an embodiment of the present disclosure, the UE may use the aforementioned sequence-based short PUCCH format or the FDM-based short PUCCH format to send UCI. According to an embodiment, the UE may use another PUCCH format to send UCI according to the payload size of the UCI to be sent. For example, when the payload size of UCI to be sent by the UE is 2 or less, the UE may use a sequence-based short PUCCH format to send the UCI. In addition, when the payload size of UCI to be sent by the UE exceeds 2, the UE may use an FDM-based short PUCCH format to send the UCI.

[0160] The type of UCI to be sent through the PUCCH may include HARQ-ACK information, SR, CSI, beam failure recovery request (BR), or a combination thereof. The UCI payload may include at least one of a bit representing the HARQ-ACK information, an SR bit, a CSI bit, or a BR bit. The HARQ-ACK information may also include one or more bits. In addition, the UE may also send multiple UCIs with different UCI types through one PUCCH. Hereinafter, a description will be provided of a method for a UE according to an embodiment of the present disclosure to send HARQ-ACK information and UCI other than HARQ-ACK information through a short PUCCH format. For example, the UE may send request information and HARQ-ACK information to the base station for indicating a request to be sent. Here, the request information may include at least one of the SR or the BR. In the present disclosure, the request information may be used as a term indicating at least one of the SR or the BR.

[0161] According to an embodiment, when a UE sends a scheduling request (SR), the UE may send the SR using an SR-PUCCH for the SR according to the configuration of the base station. The base station may set resources for sending the SR using the PUCCH through an RRC signal to the UE. In other words, the base station may configure the SR-PUCCH resources for SR transmission to the UE. The UE may send the SR-PUCCH to the base station through the SR-PUCCH resources configured by the base station. When the UE requests resources for sending UL-SCH from the base station, the UE may send the SR using the PUCCH configured for it. For example, the UE may send an SR consisting of a single bit through the PUCCH configured based on the RRC signal. In more detail, when the UE requests UL-SCH resources, the UE may send an SR as a positive SR to the base station. The base station receiving the positive SR may schedule UL-SCH resources to the UE that has sent the positive SR. Here, the SR may be signaled by at least one bit. For example, the bit value of the positive SR may be represented as 1, and the bit value of the negative SR may be represented as 0. In an embodiment described later, the SR for requesting scheduling of UL-SCH resources may be referred to as a positive SR. In addition, when the UE does not request UL-SCH resources, the negative SR may indicate the SR. In addition, when the UE does not request UL-SCH resources, the UE may not transmit the PUCCH through the resources configured with the resources for SR transmission.

[0162] At the same time, SR transmission by the UE on the time axis may overlap with HARQ-ACK information transmission for downlink data transmission by the base station. For example, the time point at which the UE attempts to request UL-SCH resources may overlap on the time axis with the time point at which the UE attempts to send HARQ-ACK information. In this case, the UE may use PUCCH to simultaneously send SR and HARQ-ACK information. When SR and HARQ-ACK information are simultaneously sent using PUCCH, the UE according to an embodiment of the present disclosure may effectively send SR and HARQ-ACK information through a multiplexing or transmission mechanism.

[0163] For example, the base station may separately configure SR-PUCCH resources for sending SR and HARQ-PUCCH resources for sending HARQ-ACK information. Here, when the UE attempts to send positive SR and HARQ-ACK information at the same time, the UE may send positive SR and HARQ-ACK information at the same time through the SR-PUCCH resources. Conversely, when the UE attempts to send negative SR and HARQ-ACK information (or only HARQ-ACK information) at the same time, the UE may send negative SR and HARQ-ACK information at the same time through the HARQ-PUCCH resources. Here, the UE may use Fig.12The base station may detect the SR-PUCCH resources and the HARQ-PUCCH resources to obtain the HARQ-ACK information and the information on whether the SR has been received.

[0164] In addition, according to the configuration of the base station, the UE can perform transmission using any one of the sequence-based short PUCCH format and the FDM-based short PUCCH format based on the payload size of the UCI to be sent. For example, the UE can use the sequence-based short PUCCH format to send only SR, or only 1 or 2 bits of HARQ-ACK information. In addition, the UE can use the FDM-based short PUCCH format to send SR and 2 or more bits of HARQ-ACK information at the same time. At the same time, the resources configured by the UE based on the sequence-based short PUCCH format for SR transmission can be multiplexed with the SR transmission of another UE. Therefore, when the UE sends SR with the aid of another resource without using the PUCCH resource for SR transmission, the SR detection performance of the base station for SR transmission to another UE can be improved. In more detail, when the UE sends SR on the resource using the FDM-based short PUCCH format, or sends SR on the resource for HARQ-ACK transmission, when the base station detects the SR resource configured to be multiplexed with the SR transmission of another UE, the SR detection performance of the base station for SR transmission to another UE can be improved. When SR and HARQ-ACK are sent at the same time, the base station according to an embodiment of the present disclosure may configure the UE to set one PUCCH resource for transmitting SR and HARQ-ACK / NACK. For example, in a time slot or subframe in which SR is set to be sent according to SR configuration, one PUCCH resource may be configured for transmission of SR and HARQ-ACK / NACK. In this case, the base station may detect one PUCCH resource to obtain HARQ-ACK information and information about whether SR has been received.

[0165] For example, when the number of bits representing the HARQ-ACK information exceeds 2, the UE may use an FDM-based short PUCCH format to send SR and HARQ-ACK information. In this case, according to the configuration of the base station, the UE may send SR and HARQ-ACK information through a PUCCH resource in an FDM-based short PUCCH format. In addition, the UCI to be sent by the UE may be of a different type from the SR and HARQ-ACK information and have three or more bits. Even in this case, the UE may send UCI using an FDM-based short PUCCH format. The base station may configure the number of bits of the HARQ-ACK information to be sent by the UE in response to the PDSCH that the base station has already sent. In addition, the base station may detect the PUCCH that has been sent from the UE based on the set number of bits of the HARQ-ACK information, and obtain the HARQ-ACK information and request information.

[0166] At the same time, when the UE uses a sequence-based short PUCCH format, the PAPR / CM (peak-to-average power ratio / cubic metric) performance can be improved compared to the case of using an FDM-based short PUCCH format. When the PAPR / CM performance is improved, the wireless communication range can be expanded. In addition, when the UE uses a sequence-based short PUCCH format, the link performance can also be improved compared to the case of using an FDM-based short PUCCH format. Therefore, the present disclosure can extend the case where the UE sends UCI using a sequence-based short PUCCH format. For example, when the UCI to be sent by the UE includes SR and 1 or 2 bits of HARQ-ACK information, the UE can send the UCI through a sequence-based short PUCCH format. The base station can configure the UE to send UCI through a sequence-based short PUCCH format.

[0167] According to an embodiment, when UCI is transmitted using a sequence-based short PUCCH format, the UE cyclically shifts the base sequence based on the UCI to be transmitted by the UE itself. When a sequence-based short PUCCH format is used using 1 RB, the UE maps the sequence cyclically shifted from the base sequence to 12 REs to transmit 12 REs. The UE may calculate a phase value indicating the phase difference between the base sequence and the cyclically shifted sequence based on an initial cyclic shift value (hereinafter referred to as a "CS initial value") and a cyclic shift value (hereinafter referred to as a "CS value"). Here, the CS value may be a value obtained by quantizing the degree to which the base sequence is cyclically shifted. In addition, the UE may obtain the CS initial value through an upper layer. More specifically, the CS initial value may be set differently for each PUCCH format. Alternatively, the UE may also obtain the CS initial value from the base station according to the PUCCH format. In addition, the phase value α may be expressed as the following equation (1). In equation (1), I may represent the symbol index of the time slot in which the PUCCH is transmitted. For example, I=0 indicates the first symbol of the slot in which the PUCCH is transmitted. In addition, I' indicates a symbol index in the slot. N may represent a time slot index in a subframe. In equation (1), the operator "x mod y" represents the remainder of x divided by y, and π represents pi. RB sc It can represent the number of subcarriers included in one RB. In addition, c(i) can represent a preset pseudo-random sequence in the wireless communication system. As described above, the UE can set the CS initial value m according to the PUCCH format. 0 and the CS value m determined by UCI cs To calculate the phase value α.

[0168] [Equation 1]

[0169]

[0170] Here,

[0171] Here, the UE may determine the CS value based on the UCI to be sent by the UE. In addition, the UE may obtain the CS initial value from the base station. According to an embodiment, the UE may determine the CS value for cyclically shifting the base sequence based on the HARQ-ACK information and whether the SR is sent. For example, the UE may determine the CS value based on the HARQ-ACK information and whether the SR is a positive SR indicating SR transmission. The UE may map the combination of the bit indicating whether the SR is a positive SR and the HARQ-ACK bit representing the HARQ-ACK information to different CS values. In addition, the UE may map the aforementioned bit combinations to sequences shifted from the base sequence based on different CS values. For example, when the HRAQ-ACK information is 1 bit, the combination of the SR bit and the HARQ-ACK bit may be mapped to 4 CS values, respectively. In addition, when the HRAQ-ACK information is 2 bits, the combination of the SR bit and the HARQ-ACK bit may be mapped to 8 CS values, respectively.

[0172] For example, when the UE sends only two bits of HARQ-ACK information, a bit set of "00, 01, 10, 11" may be mapped to 4 different CS values ​​from each other and then sent. Here, as the interval between the CS values ​​is longer, the detection performance of the base station can be increased. This is because the phase of the basic sequence that is cyclically shifted varies according to the interval between the CS values. The CS value and the phase value may have a linear relationship. More specifically, as the interval between any two CS values ​​among multiple CS values ​​becomes longer, the phase difference of the basic sequence that is cyclically shifted may become larger. In addition, as the phase difference of the basic sequence that is cyclically shifted becomes larger, the performance for identifying information mapped to the corresponding CS value may be increased. In the present disclosure, each bit set may be referred to as a state. In addition, when the number of cyclically shifted sequences identified in one symbol is N, the UE may send N different pieces of information. The UE may determine the number of different CS values ​​from each other based on the number of HARQ-ACK bits. For example, when the number of HARQ-ACK bits is m, the number of different CS values ​​from each other may be 2. m In this case, they are mapped to 2 m Two different states m The CS values ​​can be based on different m The minimum CS value among the CS values ​​increases by 2 at the same interval. m Here, the UE can be set so that the same interval is N / (2 m). For example, when N is 12 and m is 2, any two closest intervals among the four CS values ​​mapped to each state may be constant for each state. In this case, the magnitude indicating the CS interval between any two closest intervals among the plurality of CS values ​​may be 3. In addition, the four cyclic shift values ​​corresponding to the states, respectively, may be {0, 3, 6, 9}.

[0173] According to an embodiment, when the UE sends SR and HARQ-ACK information at the same time, the UE can maintain the magnitude of the interval between CS values ​​in the same manner as when only HARQ-ACK information is sent. The UE can set the interval between any two closest CS values ​​according to the HARQ-ACK information in the case of simultaneously sending SR and HARQ-ACK information to the same as the interval between any two closest CS values ​​according to the HARQ-ACK information in the case of only sending HARQ-ACK information. For example, when the SR is not a positive SR, the four CS values ​​corresponding to the states according to the HARQ-ACK information may be {0, 3, 6, 9}, respectively. In this case, when the SR is a positive SR, the UE can set the four CS values ​​to {1, 4, 7, 10} or {2, 5, 8, 11} according to the HARQ-ACK information. In this way, the UE can maintain detection performance for the HARQ-ACK information.

[0174] In more detail, the UE may determine a cyclic shift offset (hereinafter referred to as "CS offset") based on whether the SR is a positive SR. For example, when the SR is a positive SR, the CS offset may be "1". In addition, when the SR is not a positive SR (ie, the SR is a negative SR), the CS offset may be "0". In addition, the UE may calculate a first cyclic shift value (hereinafter referred to as "first CS value") calculated based on the HARQ-ACK information, and a second CS value indicating a final cyclic shift value based on the CS offset. Next, the UE may cyclically shift the base sequence based on the second CS value to generate a cyclically shifted sequence. The UE may then send a PUCCH for simultaneously transmitting SR and HARQ-ACK information based on the generated sequence.

[0175] According to the two-bit values ​​"00, 01, 10, 11" indicating the HARQ-ACK information, multiple different first CS values ​​can be "0, 3, 6, 9". In addition, when the CS offset is "0", the second CS value used to cyclically shift the basic sequence can be "0, 3, 6, 9". Conversely, when the CS offset is "1", the second CS value used to cyclically shift the basic sequence can be "1, 4, 7, 10" or "2, 5, 8, 11". In this way, according to the HARQ-ACK information, the size of the interval between any two of the closest of the multiple different CS values ​​can be kept at "3".

[0176] According to an embodiment, when SR and HARQ-ACK information are sent simultaneously, the UE may set the above-mentioned N to a larger value compared to the case where only HARQ-ACK information is sent. For example, in the case where only HARQ-ACK information is sent, the UE may set N to 12, and in the case where SR and HARQ-ACK information are sent simultaneously, the UE may set N to 16. When the HARQ-ACK information is two bits and the UE sets N to 16, the magnitude of the interval between any two closest CS values ​​among the four CS values ​​corresponding to the state may be 4. For example, the four CSI values ​​corresponding to the state according to the HARQ-ACK information may be {0, 4, 8, 12}. In addition, the UE may set the CS offset based on whether the SR is a positive SR. Here, when the SR is a positive SR, the UE may set the CS offset to "2", and when the SR is not a positive SR, the UE may set the CS offset to "0". When the SR is not a positive SR, the UE may set the four CS values ​​to {0, 4, 8, 12} according to the HARQ-ACK information. In addition, when the SR is a positive SR, the UE can set the four CS values ​​to {2, 6, 10, 14} according to the HARQ-ACK information. This is because the UE can set the interval between the cyclic shift values ​​to be longer based on the set N.

[0177] According to another embodiment, when SR and HARQ-ACK information are sent simultaneously, the UE may set N to 8. When the HARQ-ACK information is two bits and the UE sets N to 8, the magnitude between any two closest CS values ​​among the four CS values ​​corresponding to the states may be 2. For example, the four CS values ​​corresponding to the states according to the HARQ-ACK information may be {0, 2, 4, 6}. In addition, the UE may set the CS offset based on whether the SR is a positive SR. In this case, when the SR is a positive SR, the UE may set the CS offset to "1", and when the SR is not a positive SR, the CS offset may be set to "0". When the SR is not a positive SR, the UE may set the four CS values ​​to {0, 2, 4, 6} according to the HARQ-ACK information. In addition, when the SR is a positive SR, the UE may set the four CS values ​​to {1, 3, 5, 7} according to the HARQ-ACK information. This is because the UE may set the interval between the cyclic shift values ​​to be longer based on the set N.

[0178] Hereinafter, a description will be provided of a method for a UE to send an SR through a PUCCH according to an embodiment of the present disclosure. Table 4 shows a method for configuring a PUCCH resource for sending an SR in a wireless communication system according to an embodiment. The PUCCH resource for sending an SR in a wireless communication system may be allocated through RRC signaling.

[0179] [Table 4]

[0180]

[0181] In Table 4, sr-PUCCH-ResourceIndex represents the frequency domain transmission resource index used for PUCCH transmission. In addition, sr-configIndex may represent the time domain transmission resource index used for PUCCH transmission. dsr-TransMax represents the maximum number of SR transmissions. When SR is triggered in the LTE system, the UE may calculate the SR periodicity and SR subframe offset based on sr-configIndex. Next, the UE may send SR through the PUCCH resources corresponding to the calculated SR periodicity and SR subframe offset. Table 5 represents a method for calculating the SR periodicity and SR subframe offset by the UE based on sr-configIndex.

[0182] According to an embodiment, when uplink resources are not configured from the base station, the UE may retransmit the SR based on the SR periodicity up to the maximum number of SR transmissions dsr-TransMax. Even after the UE transmits the SR corresponding to the maximum number of SR transmissions, the uplink resources may not be configured. In this case, the UE may release the scheduling request for the uplink resources and perform a random access procedure.

[0183] [Table 5]

[0184]

[0185] In addition, the UE may use sr-ProhibitTimer-r9 of MAC-MainConfig of Table 4 to set the SR transmission prohibit timer in order to prevent unnecessary SR transmission. When the SR transmission prohibit timer is set, the UE may not send an SR until the SR transmission prohibit timer expires. For example, the value of sr-ProhibitTimer-r9 may be any one of 0 to 7. When the value of sr-ProhibitTimer-r9 is "2", the UE may not send an SR during twice the time of the SR cycle. In addition, the value of sr-ProhibitTimer-r9 is "0" which may indicate that there is no SR transmission prevention timer.

[0186] Meanwhile, according to the aforementioned embodiment, the UE can send the SR together with the HARQ-ACK information through one PUCCH resource. In this way, the base station can detect one PUCCH resource to identify the SR and HARQ-ACK information from the UE. In the 3GPP NR system, the UE can use the short PUCCH format to send UCI represented by 3 bits or more. In this case, the short PUCCH format can be Fig.13 In addition, the UE may use a short PUCCH format to transmit UCI represented by 2 bits or less. Here, the short PUCCH format may be a PUCCH format based on FDM described in the specification. Fig.12 A sequence-based short PUCCH format is described.

[0187] According to an embodiment, when HARQ-ACK information and SR are multiplexed in PUCCH, mapping may be performed on different sequences as shown in Tables 6 and 7. When HARQ-ACK information is expressed with 1 bit and 2 bits, Tables 6 and 7 respectively show the mapping relationship between information and sequence.

[0188] [Table 6]

[0189]

[0190] [Table 7]

[0191]

[0192] The foregoing embodiment exemplarily describes the case where SR and HARQ-ACK are sent simultaneously, but the foregoing embodiment can also be applied to the case where BR and HARQ-ACK information are sent simultaneously in the same or corresponding manner. In addition, when it is necessary to send SR, BR, and HARQ-ACK information at the same time, and the priority of BR is higher than the priority of SR, the foregoing embodiment can be applied to the case where BR and HARQ-ACK information are sent simultaneously. The priorities of SR and BR will be described in more detail through the embodiments described later.

[0193] At the same time, in a wireless communication system using millimeter wave bands, it is necessary to ensure the signal reaching distance through beamforming. For wireless communications through millimeter wave bands, the transmission coverage is limited by the large power loss caused by radio wave attenuation. Therefore, the base station and UE in the NR system using the mmWave band can configure the best transmission and reception beam pair between the base station and the UE. For example, the base station and the UE can send beam-related information with a signal to periodically match the direction of the transmission and reception beams to set the best beam pair. The UE can report to the base station beam-related information measured based on the signals sent and received by the beam. Here, the beam-related information may include at least one of the number of supported beams, the number of beam scanning resources, the beam resource location, and the beam scanning period. In addition, the operation for the base station and the UE to configure and maintain the beam pair can be referred to as beam management technology.

[0194] According to an embodiment of the present disclosure, when a beam is used to transmit and send signals in a wireless communication system, the UE may sense a beam failure. Here, the beam failure may indicate a performance degradation or link loss when transmitting and receiving signals through the beam. When a beam failure is sensed, the UE may perform a beam failure recovery mechanism. For example, after sensing the beam failure, the UE may identify a new candidate beam based on a candidate beam reference signal received from a base station. In this case, the candidate beam reference signal may include a periodic CSI-RS for beam management. Alternatively, the UE may measure the beam link quality through at least one of the periodic CSI-RS or SS and the SS / PBCH blocks of the candidate beam reference signal. The UE may then send a beam recovery request BR to the base station. Here, the BR for requesting beam recovery may be referred to as a positive BR. The case in which the UE does not send a BR in an embodiment described later may be referred to as a negative BR. In addition, the UE may monitor a search space configured for the UE in order to receive a control channel sent from the base station. In addition, the UE may receive a response from the base station to a beam failure recovery request that has been sent by the UE. In this case, the beam failure recovery mechanism can be performed by sending a beam coverage request through a physical random access channel (non-contention-based RA) or PUCCH through a non-contention-based access process. According to an embodiment of the present disclosure, a short PUCCH can be used to send the BR format in the beam-related information. In this case, the BR can be sent simultaneously with at least one of the aforementioned SR and HARQ-ACK information. For example, the BR can be multiplexed with at least one of the SR or HARQ-ACK information. Hereinafter, a method for sending BR and SR by a UE according to an embodiment of the present disclosure will be described in more detail with reference to Tables 8 to 12. In Tables 8 and 12, parameter names and parameter values ​​based on the 3GPP LTE system are used for convenience, but the present disclosure is not limited thereto.

[0195] According to an embodiment of the present disclosure, the UE may configure a common PUCCH resource for sending SR and BR. The base station may configure a common PUCCH resource for sending SR and BR through the UE. Table 8 shows a method for configuring PUCCH resources for SR and BR according to an embodiment of the present disclosure. In Table 8, srbr-PUCCH-ResourceIndex represents the frequency domain index of the PUCCH resource for SR and BR, and srbr-ConfigIndex represents the time domain index of the PUCCH resource for SR and BR. In addition, dsr-TransMax represents the maximum number of SR transmissions, and br-TransMax represents the maximum number of BR transmissions. Here, the values ​​​​of dsr-TransMax and br-TransMax may be the same as each other. In addition, the UE may set a BR timer (br-Timer) indicating the time when BR retransmission is possible.

[0196] Unlike the prohibition timer in LTE SR, in NR BR, the UE sets a br-Timer to limit the effective operation time of the BR except for the maximum number of retransmissions. The corresponding parameter can indicate the permission of BR retransmission based on the time slot (or subframe) at the reference time by the offset indicated by the br-Timer. As an embodiment, the reference time of the br timer is set to the time slot (or subframe) in which the first BR is sent, and when the offset value is a unit value of the time slot (or subframe), in the example of Table 5, the time limit for BR to be sent is generated according to the offset range. For example, when the br-Timer is 3, the UE can retransmit the BR from the first transmission BR time slot (or subframe) to the third time slot (or subframe). The corresponding br-Timer value is not limited to the offset and can be modified in various types representing time information. For example, when the br timer is set to an index and has a value from 1 to 4, the BR timer value corresponding to each index can be set. In addition, when the corresponding information is sent to the UE through the RRC signal, the UE can operate the BR timer based on the corresponding information. Either or both of the corresponding maximum transmission time and BR timer may be used for BR transmission. Table 8 shows that the maximum transmission number of BR and the BR timer parameters are included in messages different from each other, but the messages may be the same as each other.

[0197] The UE may retransmit the BR from the index of the subframe (or time slot) indicating the reference time to the index of the subframe (or time slot) indicated by the BR timer. According to one embodiment, the reference time for the BR timer operation may be the subframe (or time slot) in which the BR is first transmitted. In addition, the offset time represented by the BR timer may be a value in units of a subframe (or time slot). For example, when the BR timer indicates "3", the BR may be retransmitted to the third frame (or time slot) following the subframe (or time slot) in which the BR is first transmitted. In this case, the method by which the BR timer indicates the time at which the BR retransmission may be performed is not limited to the above-mentioned method of representing the offset time.

[0198] [Table 8]

[0199]

[0200] When a common PUCCH resource is configured for transmitting SR and BR, the base station can determine whether at least one of SR and BR is included therein by performing PUCCH detection from one PUCCH resource. In this case, the base station determines whether the PUCCH for SR and BR includes SR, BR, or both SR and BR based on the sequence. Table 9 shows a method for multiplexing SR and BR based on a sequence. The UE can determine the sequence for transmission of PUCCH to be used for SR and BR based on at least one of SR and BR. As shown in Table 9, the UE can use different sequences to send PUCCH for SR and BR according to SR and BR. For example, when only SR is transmitted, the UE can use sequence #1 to transmit PUCCH. In addition, when only BR is transmitted, the UE can use sequence #2 to transmit PUCCH. In addition, when SR and BR are transmitted simultaneously, the UE can use sequence #3 to transmit PUCCH. In addition, when SR or BR transmission is not necessary (ie, when both SR and BR are not transmitted), the UE may not transmit PUCCH through PUCCH resources configured to transmit SR and BR. By this, the UE can use three sequences different from each other to transmit SR and BR.

[0201] In this case, according to the length of the sequence supported by the PUCCH format, the sequence may include at least one of a 1-RB sequence, a 2-RB sequence, or a Zadoff-Chu sequence. In addition, the UE may generate different sequences using different base sequences identified by a root index. Alternatively, the UE may generate different sequences by cyclically shifting a base sequence based on a cyclic shift value. In addition, the UE may send PUCCH for SR and BR using a sequence determined based on a mutual correlation or autocorrelation performance.

[0202] In addition, the UE can distinguish states from each other by assigning sequences cyclically shifted from the same base sequence based on different cyclic shift values ​​to no transmission, SR-only transmission, BR-only transmission, and both SR and BR transmission. No transmission can be defined as no signal is transmitted without sequence assignment.

[0203] [Table 9]

[0204] Sequence #1 Sequence #2 Sequence #3 SR only BR only SR+BR

[0205] According to an embodiment, the UE may use a puncturing sequence based on a puncturing pattern to send a PUCCH for SR and BR. In this case, the base station may determine whether the PUCCH for SR and BR includes SR, BR, or both SR and BR based on the sequence. In more detail, the base station may identify the information included in the PUCCH by energy detection according to the puncturing pattern. In this case, the UE may puncture a sequence differently depending on whether SR and BR are sent, and send PUCCH for SR and BR. Table 10 shows a method for multiplexing SR and BR based on a puncturing pattern. In more detail, when only SR is sent, the UE may puncture RE according to a first puncturing pattern in a PUCCH resource in which a sequence is to be sent, and send a sequence. In addition, when only BR is sent, the UE may puncture RE according to a second puncturing pattern in a PUCCH resource in which a sequence is to be sent, and send PUCCH. In this case, the first puncturing pattern may be different from the second puncturing pattern. In addition, when SR and BR are sent simultaneously, the UE may send a sequence that is not punctured.

[0206] [Table 10]

[0207] Sequence with puncture mode 1 Sequence with puncture pattern 2 Sequence without puncture SR only BR only SR+BR

[0208] Unlike Table 10, whether the PUCCH for SR and BR includes "SR", "BR", or "SR and BR" can be distinguished based on two or more different sequences and puncturing patterns. Table 11 shows a method in which SR and BR are multiplexed based on two sequences and one puncturing pattern. Similar to Table 11, when only BR or both SR and BR are transmitted, the UE can transmit the same message using different sequences. In addition, when only SR is transmitted, the UE can carry the signal on a specific RC by applying the puncturing pattern to sequence #1 used for BR transmission.

[0209] [Table 11]

[0210] Sequence #1 with perforation pattern Sequence #1 without punctures Sequence #2 without punctures SR only BR only SR+BR

[0211] In addition to Tables 9 to 11, the present disclosure includes various methods for distinguishing SR from BR and for multiplexing SR and BR, which may consist of the number of sequence usages, the number of puncturing patterns, and a combination thereof.

[0212] In addition, when the SR and BR to be sent by the UE overlap in a specific time slot, the UE can prioritize the SR or BR when multiplexing the SR and BR, and send the corresponding sequence using the corresponding PUCCH that is used only to indicate the SR or BR. Thereafter, the UE can send request information about a lower priority through another resource. For the priority of SR and BR, the priority of BR can be set to be higher. In this case, after the sequence transmission of BR, the beam failure recovery mechanism runs. SR is sent through the UL channel (i.e., PUCCH or PUSCH) generated in this case, and the delay for SR can be reduced. On the contrary, for the priority of SR and BR, the priority of SR can be set to be higher. In this case, PUCCH or PUSCH transmission can occur after SR transmission. Here, the UE can send BR through the corresponding channel to reduce the delay for BR.

[0213] According to another embodiment of the present disclosure, PUCCH resources for the respective SRs and BRs may be independently configured for the SRs and BRs. Table 12 shows the configuration of PUCCH resources for the BRs according to an embodiment of the present disclosure.

[0214] When PUCCH resources are allocated so as not to overlap or PUCCH resources are allowed to overlap, SR and BR can be composed independently. Table 12 shows the structure of the configuration of PUCCH resource allocation for SR and BR. For ease of explanation, it is assumed that SR composition operates the same as LTE. In this case, Table 12 shows a message structure in which only parameters corresponding to BR are included in the configuration among multiple parameters. In the example of Table 12, the description of the parameters is the same as that in Table 8.

[0215] [Table 12]

[0216]

[0217] According to an embodiment, the UE may configure separate PUCCH resources for each transmission of SR and BR. Here, the SR-PUCCH resources for SR transmission and the BR-PUCCH resources for BR transmission may be configured not to overlap in the time domain or frequency domain. In this case, the base station may detect the corresponding PUCCH resources to determine whether the SR or BR has been received.

[0218] At the same time, even when the SR-PUCCH resources and the BR-PUCCH resources are independent of each other, the individual PUCCHs for SR and BR may be allocated to a single resource in the region where the corresponding uplink control channel is transmitted. In this case, the UE may transmit only a single PUCCH in the corresponding region. In this case, the UE may transmit PUCCHs for multiplexed SR and BR. For example, the UE may transmit PUCCHs for SR or PUCCHs for BR using different sequences corresponding to SR and BR, respectively. In addition, when SR and BR are transmitted at the same time, the UE may use a sequence corresponding to BR to transmit PUCCHs for multiplexed SR and BR through SR-PUCCH resources. In addition, the UE may use a sequence corresponding to SR to transmit PUCCHs for multiplexed SR and BR through BR-PUCCH resources.

[0219] Alternatively, the UE may use a puncturing pattern corresponding to any one of the SR and the BR based on a sequence punctured from the base sequence to send a PUCCH for the SR or a PUCCH for the BR. For example, the base station may configure a puncturing pattern corresponding to the SR. In this case, the UE may puncture the base sequence based on the puncturing sequence corresponding to the SR. In addition, the UE may use the puncturing sequence to send the PUCCH for the SR. In addition, the UE may use the unpunctured base sequence to send the PUCCH for the BR. When the SR and the BR are sent simultaneously, the UE may use the base sequence to send the PUCCH for the multiplexed SR and BR through the SR-PUCCH resources. Alternatively, the UE may use the puncturing sequence to send the PUCCH for the multiplexed SR and BR through the SR-PUCCH resources.

[0220] Instead, the base station can configure a puncturing pattern corresponding to the BR. In this case, the UE can puncture the basic sequence based on the puncturing sequence corresponding to the BR. In addition, the UE can use the puncturing sequence to send the PUCCH for the BR. In addition, the UE can use the unpunctured basic sequence to send the PUCCH for the SR. When the SR and BR are sent at the same time, the UE can use the basic sequence to send the PUCCH for the multiplexed SR and BR through the BR-PUCCH resource. Alternatively, the UE can use the punctured sequence to send the PUCCH for the multiplexed SR and BR through the SR-PUCCH resource.

[0221] At the same time, the aforementioned SR-PUCCH resources and BR-PUCCH resources may overlap in the time domain and the frequency domain. For example, the SR-PUCCH resources and the BR-PUCCH resources may overlap in the time domain. In a state where transmission for SR and BR is necessary, the UE may send any one between the PUCCH for SR and the PUCCH for BR based on the priority of each of the SR and BR. Alternatively, when a single PUCCH resource is configured for SR and BR, the UE may send any one of the SR and BR through the PUCCH resources for SR and BR. In this case, when the PUCCH is detected through the PUCCH resources for SR and BR, the base station may determine that a request with a higher priority between SR and BR has been received. The base station may perform subsequent operations under the request of a higher priority between SR and BR. Next, the UE may send another one between SR and BR through a resource capable of sending an uplink among subsequent resources.

[0222] In more detail, the UE may set the priority of BR to be higher than that of SR. Because BR is a request to be sent when the link is lost, the UE may optimize BR compared to the request for scheduling. In a state where the transmission of SR and BR is necessary, the UE may send BR through PUCCH resources or BR-PUCCH resources configured for SR and BR. Then, the UE may send SR through subsequent PUCCH resources or PUSCH resources. In this case, the subsequent PUCCH resources or PUSCH resources may be resources allocated by the base station through a higher priority request BR. Through this, the UE can reduce the delay for SR transmission. Conversely, the UE may set the priority of SR to be higher than that of BR. In this case, the UE may send BR through SR-PUCCH resources or PUCCH resources configured for SR and BR. Then, the UE may send BR through subsequent PUCCH resources or PUSCH resources. Through this, the UE can reduce the delay for BR transmission.

[0223] For SR and BR transmissions, the base station can use RRC signals to semi-statically configure PUCCH transmission resources. This is because it is difficult for the base station to predict the time for sending the corresponding request. On the other hand, for HARQ-ACK information, the base station uses DCI to dynamically configure PUCCH transmission resources, or uses RRC signals to semi-statically configure PUCCH transmission resources. This is because the HARQ-ACK information is a response to a downlink transmission from the base station. The base station may be aware of the transmission time of the HARQ-ACK information. Hereinafter, a description of the method for sending SR, BR, and HARQ-ACK by a UE according to an embodiment of the present disclosure will be provided in more detail with reference to Tables 13 to 18.

[0224] According to an embodiment of the present disclosure, the UE may use the PUCCH to simultaneously transmit SR, BR, and HARQ-ACK information. In this case, the UE may multiplex the SR, BR, and HARQ-ACK information. In addition, the UE may use a single PUCCH to simultaneously transmit the multiplexed SR, BR, and HARQ-ACK information. The UE may multiplex the SR, BR, and HARQ-ACK information based on a sequence allocated to transmit the SR, BR, and HARQ-ACK information. In addition, the UE may multiplex the SR, BR, and HARQ-ACK information based on a PUCCH resource configured to transmit the SR, BR, and HARQ-ACK information. Alternatively, the UE may simultaneously transmit one or two of the SR, BR, and HARQ-ACK information based on the respective priorities of the SR, BR, and HARQ-ACK information. In the following, for ease of description, a transmission method for representing the HARQ-ACK information with 1 bit is described, but the present disclosure is not limited thereto. Even when the HARQ-ACK information is represented with 2 bits, the transmission method described below will be applied identically or correspondingly. More specifically, the HARQ-ACK information may be classified into ACK and NACK. In addition, SR is classified into positive SR and negative SR. In addition, BR is classified into positive BR and negative BR.

[0225] According to an embodiment, the base station may configure 3 PUCCH resources for each transmission of SR, BR, and HARQ-ACK information. In other words, when three PUCCH resources different from each other are allocated, the UE may use three sequences different from each other to simultaneously send SR, BR, and HARQ-ACK information through PUCCH. Here, the three PUCCH resources may be represented by resource 1, resource 2, and resource 3. In addition, the three sequences may be represented by sequence #1, sequence #2, and sequence #3. Table 13 shows the sequences and PUCCH resources mapped to the respective states when three PUCCH resources and three sequences are used to multiplex one bit of HARQ-ACK information, SR, and BR. In Table 13, when the HARQ-ACK information is NACK and is "only NACK" that does not send SR and BR, the UE may not send PUCCH. In addition, the UE may use the puncturing patterns described in Tables 10 and 11 to distinguish the states in Table 13 from each other. For example, when a basic sequence is used, the UE may distinguish the states in Table 13 based on two puncturing patterns.

[0226] [Table 13]

[0227] state Combination of sequence and PUCCH resources ACK Only Sequence #1 + Resource 1 ACK+SR Sequence #1 + Resource 2 ACK+BR Sequence #1 + Resource 3 ACK+SR+BR Sequence #3 + Resource 1 NACK only Sequence #2 + Resource 1 or no transmission NACK+SR Sequence #2 + Resource 2 NACK+BR Sequence #2 + Resource 3 NACK+SR+BR Sequence #3 + Resource 2 or Sequence #3 + Resource 3

[0228] According to an embodiment, the UE may send SR, BR, and HARQ-ACK information through a single PUCCH resource for sending any two of the SR, BR, and HARQ-ACK information and another PUCCH resource for sending the remaining one. The base station may configure a PUCCH resource for sending any two of the SR, BR, and HARQ-ACK information and another PUCCH resource for sending the remaining one. In other words, when the UE is allocated two different PUCCH resources, the base station may, for example, configure a BR-PUCCH resource for sending BR and an SR-HARQ-PUCCH resource for sending SR and HARQ-ACK information. In this case, the UE may use four different sequences to send SR, BR, and HARQ-ACK information through PUCCH. Here, two different PUCCH resources may be represented by resource 1 and resource 2. In addition, the four sequences may be represented by sequence #1, sequence #2, sequence #3, and sequence #4. Table 14 shows the sequences and PUCCH resources mapped to each state when one bit of HARQ-ACK information, SR, and BR are multiplexed using two PUCCH resources and four sequences.

[0229] In Table 14, PUCCH resource 1 may be configured as a PUCCH resource for sending HARQ-ACK information. In addition, PUCCH resource 2 may be configured as a PUCCH resource for sending SR and BR. Here, when the UE sends PUCCH through resource 1, the base station may determine that the HARQ-ACK information indicates ACK. In addition, the base station may distinguish the transmissions of "negative SR and negative BR", "positive SR", "positive BR", and "positive SR and positive BR" from each other based on the PUCCH sequence detected from resource 1. When the UE sends PUCCH through resource 2, the base station may determine that the HARQ-ACK information indicates NACK. In addition, the base station may distinguish the transmissions of "negative SR and negative BR", "positive SR", "positive BR", and "positive SR and positive BR" from each other based on the PUCCH sequence detected from resource 2. In addition, the UE may use the perforation patterns described in Tables 10 and 11 to distinguish the states in Table 14 from each other.

[0230] [Table 14]

[0231] state Combination of sequence and PUCCH resources ACK Only Sequence #1 + Resource 1 ACK+SR Sequence #1 + Resource 1 ACK+BR Sequence #1 + Resource 1 ACK+SR+BR Sequence #3 + Resource 1 NACK only Sequence #2 + Resource 2 or no transmission NACK+SR Sequence #2 + Resource 2 NACK+BR Sequence #2 + Resource 2 NACK+SR+BR Sequence #3 + Resource 2

[0232] Table 15 shows the sequences and PUCCH resources mapped to the respective states when two PUCCH resources and eight sequences are used to multiplex 2-bit HARQ-ACK information, SR, and BR. For example, one PUCCH resource for sending SR and BR and one PUCCH resource for sending HARQ-ACK information may be configured. In Table 15, resource 1 may be a PUCCH resource used when the first bit between two bits of HARQ-ACK information is ACK. In addition, resource 2 may be configured as a PUCCH resource for sending SR and BR. Here, when the UE sends PUCCH through resource 1, the base station may determine that the first bit between the 2-bit HARQ-ACK information indicates ACK. In addition, the base station may determine whether the second bit between the 2-bit HARQ-ACK information is ACK or NACK, and distinguish between the transmissions of "negative SR and negative BR", "positive SR", "positive BR", and "positive SR and positive BR" based on the PUCCH sequence detected from resource 1. Conversely, when the UE sends PUCCH through resource 2, the base station may determine that the 2-bit HARQ-ACK information indicates NACK. In addition, the base station can determine whether the second bit between the 2-bit HARQ-ACK information is ACK or NACK, and distinguish the transmission of "negative SR and negative BR", "positive SR", "positive BR", and "positive SR and positive BR" from each other based on the PUCCH sequence detected from resource 2. In addition, the UE can use the puncturing patterns described in Tables 10 and 11 to distinguish the states in Table 15 from each other.

[0233] [Table 15]

[0234]

[0235]

[0236] At the same time, unlike Table 15, when 2 bits of HARQ-ACK information are bundled, the UE can multiplex the 2-bit HARQ-ACK information, SR, and BR by the methods described in Tables 10, 11, and 13. This is because when 2 bits of HARQ-ACK information are bundled, 2 bits of HARQ-ACK information can be represented by one bit.

[0237] According to an embodiment, the base station may configure one PUCCH resource for sending SR, BR, and HARQ-ACK information. In other words, when the UE is allocated one PUCCH resource, the base station may, for example, configure an SR-HARQ-PUCCH resource for sending BR, SR, and HARQ-ACK information. In this case, the UE can use eight different sequences to send SR, BR, and HARQ-ACK information via PUCCH. In addition, the eight sequences can be represented by sequences #1 to #8. Table 16 shows the sequences and PUCCH resources mapped to respective states when one PUCCH resource and eight sequences are used to multiplex 1-bit HARQ-ACK information, SR, and BR. In addition, unlike Table 16, the UE can use the puncturing patterns described in Tables 10 and 11 to distinguish the states in Table 16 from each other. On the other hand, when the HARQ-ACK information is 2 bits, the UE can use one PUCCH resource and multiple sequences to multiplex 2-bit HARQ-ACK information, SR, and BR. In addition, when 2-bit HARQ-ACK information is bundled, the UE can multiplex the 2-bit HARQ-ACK information, SR and BR in the same method described in Table 16.

[0238] [Table 16]

[0239]

[0240]

[0241] According to an embodiment, the UE may send a PUCCH for any one of the SR, BR, and HARQ-ACK information based on the respective priorities of the SR, BR, and HARQ-ACK information. In this case, the UE may use a sequence mapped to a state to send a PUCCH through a PUCCH resource allocated to the state. According to an embodiment, the UE may send a PUCCH for any two of the SR, BR, and HARQ-ACK information based on the respective priorities of the SR, BR, and HARQ-ACK information. In this case, the UE may multiplex any two of the SR, BR, and HARQ-ACK information in the above-mentioned multiplexing method for SR and BR. Table 17 shows the sequences and PUCCH resources mapped to the respective states when three PUCCH resources and two sequences are used to send 1-bit HARQ-ACK information, SR, and BR. Here, the priority of the SR may be configured to be lower than the priority of the BR and HARQ-ACK information. In addition, the UE may send a PUCCH for the BR and HARQ-ACK information based on the respective priorities of the SR, BR, and HARQ-ACK information. In this case, the UE may send the SR through a subsequent PUCCH resource or PUSCH resource. Through this, the UE can reduce the delay for BR transmission. In addition, the UE can use the puncturing patterns described in Table 10 and Table 11 to distinguish the states in Table 17 from each other.

[0242] [Table 17]

[0243] state Combination of sequence and PUCCH resources ACK Only Sequence #1 + Resource 1 ACK+SR Sequence #1 + Resource 2 ACK+BR Sequence #1 + Resource 3 ACK+SR+BR Followed by ACK+BR except SR NACK only Sequence #2 + Resource 1 or no transmission NACK+SR Sequence #2 + Resource 2 NACK+BR Sequence #2 + Resource 3 NACK+SR+BR Follow NACK+BR except SR

[0244] Table 18 shows a multiplexing method when 2-bit HARQ-ACK information, SR, and BR are transmitted according to the priority of the HARQ-ACK information, SR, and BR. As described above, when the 2-bit HARQ-ACK information is bundled, the UE can multiplex the 2-bit HARQ-ACK information, SR, and BR in the same method described by Table 15. When the 2-bit HARQ-ACK information is not bundled, the UE can transmit a PUCCH for 2-bit HARQ-ACK information and BR by applying the above method to the multiplexing state of the application priority in Table 18.

[0245] [Table 18]

[0246] The state reused before applying the priority The state reused after applying the priority (ACK,ACK)+BR+SR (ACK,ACK)+BR (ACK,NACK)+BR+SR (ACK,NACK)+BR (NACK,ACK)+BR+SR (NACK,ACK)+BR (NACK,NACK)+BR+SR (NACK,NACK)+BR

[0247] At the same time, according to an embodiment of the present disclosure, the base station may configure a BR-PUCCH resource for sending BR and an SR-HARQ-PUCCH resource for sending SR and HARQ-ACK information. For example, SR and HARQ-ACK information may be multiplexed and sent through SR-HARQ-PUCCH resources. In this case, the UE may send at least one of the SR and HARQ-ACK information through the SR-HARQ-PUCCH resource according to the above-mentioned method of simultaneously sending SR and HARQ-ACK information. For example, the UE may multiplex HARQ-ACK information and SR through the method described in Table 6 (1-bit HARQ-ACK) and Table 7 (2-bit HARQ-ACK).

[0248] In addition, when the transmission of at least one of the SR and HARQ-ACK information overlaps with the BR transmission, the UE may use the PUCCH to simultaneously transmit the BR and at least one of the SR and HARQ-ACK information. For example, the UE may simultaneously transmit the BR and at least one of the SR and HARQ-ACK information through the PUCCH resources used to transmit the SR and HARQ-ACK information between the BR-PUCCH resources and the SR-HARQ-PUCCH resources. Here, the UE may determine a PUCCH resource between the BR-PUCCH resource and the SR-HARQ-PUCCH resource as a PUCCH resource for transmitting the SR and HARQ-ACK information based on whether the BR is a positive BR. In more detail, when a positive BR is transmitted, the UE may transmit the SR and HARQ-ACK information through the BR-PUCCH resource. On the contrary, when a negative BR is transmitted, the UE may transmit the SR and HARQ-ACK information through the SR-HARQ-PUCCH resource.

[0249] In this case, the base station can detect PUCCH from the BR-PUCCH resources and the SR-HARQ-PUCCH resources to determine whether a BR has been received. For example, when SR and HARQ-ACK information are detected from the BR-PUCCH resources, the base station can determine that a positive BR has been received. In addition, the base station can obtain HARQ-ACK information and whether the SR is a positive SR through the sequence used to send the SR and HARQ-ACK information. Conversely, when SR and HARQ-ACK information are detected from the SR-HARQ-PUCCH resources, the base station can determine that a negative BR has been received.

[0250] The channel selection method for detecting whether BR has been sent by configuring BR-PUCCH as a resource separated from SR-HARQ-PUCCH can be equally applied to various methods that can be configured to simultaneously send SR and HARQ-ACK information on a single resource. As an embodiment, when the HARQ-ACK information is 1 bit, the UE can use four different values ​​cyclically shifted from the root sequence or base sequence sent through the PUCCH resource to simultaneously send SR and 1 bit of HARQ-ACK information. Alternatively, when the HARQ-ACK information is 2 bits, the UE can simultaneously send SR and 2 bits of HARQ-ACK information by eight different values ​​cyclically shifted from the root sequence or base sequence sent through the PUCCH resource. The method can be applied identically or correspondingly to the above two situations, and the method is that the base station determines whether BR has been sent from the UE by means of channel selection based on whether BR has been sent.

[0251] As mentioned above, because the transmission time of SR or BR is determined by the UE, it may be difficult for the base station to allocate PUCCH resources using DCI. On the other hand, the base station can allocate PUCCH resources through DCI so that the UE reports channel or beam related information. Here, when the SR (or BR) transmission of the UE overlaps with the PUCCH transmission for reporting allocated by DCI, the UE can send SR (or BR) through the reporting PUCCH. Specifically, the UE can send SR (or BR) and report PUCCH through the reporting PUCCH resources allocated by DCI. In addition, the UE can configure 2 bits indicating SR and BR, respectively, to send 2 bits through the reporting PUCCH. Table 19 lists the bits configured according to SR and BR. In Table 19, SR on / off respectively represents positive SR and negative SR. In addition, in Table 19, BR on / off respectively represents positive BR and negative BR.

[0252] [Table 19]

[0253] SR Open SR Off BR Open 1，1 1，0 BR Close 0，1 0，0

[0254] At the same time, according to an embodiment, when only 1 bit transmission can be performed by reporting PUCCH, the UE can send request information by reporting PUCCH, which request information indicates a request for a higher priority between SR and BR according to the priority of SR and BR. In addition, when PUCCH is detected through PUCCH resources for SR and BR, the base station can determine that information indicating a request for a higher priority between SR and BR has been received. In this case, when the information indicating the request is 1, the base station can determine that the request is positive. In addition, when the information indicating the request is 0, the base station can determine that the request is negative. The UE can then send a lower priority request through subsequent PUCCH resources or PUSCH resources. In this way, the UE can reduce the delay in transmission of lower priority requests.

[0255] According to an embodiment of the present disclosure, a UE may simultaneously transmit PUCSH and PUCCH. Here, PUCCH may be transmitted using any one of the PUCCH formats classified as the aforementioned long PUCCH. Like the existing LTE(-A) system, in the NR system, when simultaneous transmission of PUSCH and PUCCH is configured to the UE in a specific subframe, the UE may simultaneously transmit PUSCH and PUCCH. For example, the base station may configure the UE to simultaneously transmit PUSCH and PUCCH by determining whether the RRC signal is connected or disconnected to simultaneously transmit PUSCH and PUCCH. Here, the UE may transmit PUSCH and PUCCH through the same subcarrier or different subcarriers. However, when simultaneous transmission of PUSCH and PUCCH is not configured to the UE in a specific subframe, the UE may transmit UCI only through PUCCH unless PUSCH transmission is not scheduled in the subframe. In this case, when PUSCH transmission is scheduled in the subframe, the UE may piggyback the UCI to be transmitted through PUCCH on PUSCH, and then transmit the UCI. This can also be applied to the case of carrier aggregation in the same or corresponding manner. On the other hand, in the NR system, UCI may include beam-related information or beam management information for beamforming through millimeter wave (mmWave).

[0256] According to an embodiment of the present disclosure, a UE that has received an RRC signal in which the PUSCH-PUCCH configuration parameter is turned on can send PUSCH and PUCCH simultaneously, indicating whether the parameters of PUSCH and PUCCH are sent simultaneously are configured. For example, when it is necessary to transmit PUSCH and PUCCH simultaneously, the UE can send PUSCH and PUCCH in a single time slot. Here, when intermodulation distortion (IMD) occurs in the UE, the UE can selectively send PUSCH or PUCCH, or an uplink channel of a possible format in which the uplink channel is transmitted simultaneously. Alternatively, when the signal attenuation level in another frequency domain caused by interference according to IMD meets the RF requirements, the UE can send PUSCH and PUCCH simultaneously. Here, transmitter intermodulation refers to the intermodulation between a transmission signal sent by a base station or UE and another strong signal sent around the base station or UE. Therefore, in a state where a signal sent from another base station is co-located, a transmission signal from another base station detected by the antenna connector of the base station can have a value attenuated by 30dB. Here, even when an interfering signal is present, other unwanted emissions may be limited.A transmission signal from another UE detected through the antenna connector of the other UE may have a value attenuated by 40 dB.

[0257] When PUSCH and PUCCH are transmitted simultaneously, IMD may increase as the distance between the frequency resources allocated to the transmission of PUSCH and PUCCH becomes longer. At the same time, PUCCH resources may be configured to be closer to the edge of the uplink transmission band in order to obtain frequency diversity gain. Therefore, when PUSCH and PUCCH are sent simultaneously, IMD may occur except for the case where PUSCH occupies the entire uplink transmission band. Here, the frequency resource may represent the subcarrier index of RE. According to an embodiment of the present disclosure, the UE may allocate the PUCCH frequency resource to a frequency resource at a position close to the PUSCH frequency resource. In the following, when PUSCH and PUCCH are sent simultaneously according to an embodiment of the present disclosure, Figures 14 to 17 The method for UE to configure PUCCH resources is described in detail.

[0258] Fig.14 FIG. 1 illustrates a PUCCH frequency resource allocated to a frequency resource at a position continuous with a PUSCH frequency resource according to an embodiment of the present disclosure. Fig.14a, the PUCCH may be mapped to a frequency resource at a position continuous with the PUSCH frequency resource allocated for PUSCH transmission. In this case, the frequency resource at a position continuous with the PUSCH frequency resource may represent a frequency resource at an adjacent position. In addition, in the frequency domain, there may not be another frequency resource for separating the PUCCH frequency resource from the PUSCH resource between the PUCCH frequency resource and the PUSCH resource. On the other hand, when hopping two frequency resources enables obtaining Fig.14 When the frequency diversity gain in a is achieved, data cannot be allocated to the resources of area "1401" and area "1402". Fig.14 b. PUCCH resources may be allocated to a part of PUSCH resources. In addition, PUCCH resources may not be frequency-hopped. By this, the UE may prevent resource waste in the area "1401" and the area "1402".

[0259] Fig.15 FIG. 4 illustrates the PUCCH resources configured according to an embodiment of the present disclosure. Fig.15 , area "1503" and area "1504" may correspond to Fig.14 a. Here, the PUCCH mapped to the area "1503" and the area "1504" may be repeated in the area "1501" and the area "1502". For example, the UE may transmit the PUCCH mapped to the area "1503" and the area "1504" through the resources corresponding to the area "1501" and the area "1502". Fig.15 In the example, an interval in which one PUCCH, a long PUCCH, and a short PUCCH are transmitted may be referred to as a slot interval. Here, when frequency hopping is performed on the PUCCH in an interval in which a long PUCCH is transmitted in a slot interval, a symbol interval of each of regions "1501" to "1504" may represent a symbol interval allocated to a portion of the PUCCH. Through this, the UE may obtain time and frequency diversity gain in PUCCH transmission.

[0260] Fig.16 FIG. 4 illustrates the PUCCH resources configured according to an embodiment of the present disclosure. Fig.16 , the UE can allocate PUCCH resources to part of PUSCH resources without frequency hopping.

[0261] In the aforementioned Fig.14 b and Fig.16In the present invention, when the PUCCH resource is allocated to a part of the PUSCH resource, the UE can configure the PUCCH resource based on the position of the resource through which the DMRS for the PUSCH is sent. This is because the resource through which the DMRS is sent may conflict with the PUCCH resource. For example, the UE can puncture the first symbol at the beginning of the PUSCH resource in the PUCCH resource for PUCCH. Alternatively, the UE can configure a shortened PUCCH obtained by removing the first symbol at the beginning of the PUSCH resource in the PUCCH resource for PUCCH. This is because when the DMRS is preloaded, that is, at the first symbol at the beginning of the PUSCH resource, the DMRS of the PUSCH can be sent. When the PUCCH is the aforementioned long PUCCH, the shortened PUCCH can be referred to as a shortened long PUCCH. Here, the number of symbols forming the long PUCCH in a single time slot can be any one of {4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14}.

[0262] When the number of symbols forming the long PUCCH is 4, the shortened long PUCCH may be configured with 3 symbols. Here, it may not be expected that the base station receives the PUCCH among the PUSCH resources in the symbol to which the DMRS is mapped. Alternatively, when the number of symbols configuring the long PUCCH is 4, the UE may not allocate PUCCH resources on the PUSCH resources according to the configuration of the base station. In this case, the UE may selectively send only one between the PUSCH and the PUCCH. In addition, the UE may send only one between the PUSCH and the PUCCH based on the type of UCI sent through the PUCCH. For example, when the number of symbols of the PUCCH configured for HARQ-ACK information is 4, the UE may send only the PUCCH between the PUSCH and the PUCCH to be sent simultaneously. This is because the HARQ-ACK information is a response to DL transmission. Alternatively, when a PUCCH consisting of 4 symbols is configured from the base station, the UE may map the UCI to be sent through the PUCCH resources to the preset PUSCH resources and send the UCI. Alternatively, the UE may not transmit the DMRS through the PUSCH resources.

[0263] In the following, we will Fig.17 a to Fig.17 c provides a description on a method for a UE to configure PUCCH resources when PUCCH resources are moved onto PUSCH resources and collide with DMRS resources. Fig.17 a to Fig.17 c illustrates a DMRS resource for transmitting a DMRS and a PUCCH resource allocated to a portion of a PUSCH resource according to an embodiment of the present disclosure.

[0264] refer to Fig.17 b and Fig.17 c. Another part of the PUSCH other than the DMRS may not be allocated to the frequency resources allocated by the PUCCH. In this case, when the sequence characteristics of the DMRS as a part of the PUSCH are to be maintained for MU-MIMO multiplexing with another UE, the base station can be configured to send a shortened PUCCH to the UE, and the UE can perform transmission using the shortened PUCCH. On the other hand, when the DMRS as a part of the PUSCH is not configured with a sequence and is not CDM multiplexed with other UEs for MU-MIMO, because the PUSCH is not included in the area where the PUCCH is moved, when not using Figures 14 to 16 A long PUCCH may be transmitted in the case of a shortened PUCCH as shown in FIG.

[0265] According to an embodiment, when PUCCH resources are allocated to a part of PUSCH resources, the UE may puncture the symbols allocated to PUCCH resources or the symbols allocated to DMRS resources among the PUSCH resources. Here, the UL DCI for scheduling PUSCH may include a puncture indicator for puncturing any one of the symbols allocated to PUCCH resources and the symbols allocated to DMRS resources. The UE may puncture any one of the symbols allocated to PUCCH resources and the symbols allocated to DMRS resources based on the puncture indicator. More specifically, when PUCCH resources are allocated to a first PUSCH resource that is a part of the PUSCH resources, the UE may puncture the first PUSCH resource. According to another embodiment, when PUCCH is configured to be sent periodically, the first PUSCH resource may be configured to perform rate matching in the time period in which PUCCH is to be sent.

[0266] In addition, the base station may determine whether to perform puncturing or rate matching on the first PUSCH resource based on the UCI sent via the PUCCH. For example, when the PUCCH includes the transmission of HARQ-ACK information, the UE may perform puncturing on the first PUSCH resource according to the configuration of the base station. In addition, when the PUCCH includes only the transmission of UCI other than the HARQ-ACK information, the UE may send the UCI through the first PUSCH resource that is rate matched according to the configuration of the base station. Here, the UCI other than the HARQ-ACK information may include at least any one of CQI, RI, PMI, or beam-related information. When DL transmission is lost, HARQ-ACK information may not be sent. In contrast, a base station that has performed DL transmission may expect to receive HARQ-ACK information. In this case, when the PUSCH resource for transmitting HARQ-ACK information is configured for rate matching and DL transmission is lost, the base station may not be able to decode the UCI in addition to the HARQ-ACK information sent via the PUCCH. In contrast, when the PUCCH includes only the transmission of a channel status report such as CQI, RI, PMI, or beam-related information, a mismatch may not occur even when the first PUSCH resource is rate matched. This is because the channel status report can be set to be periodically transmitted via the PUCCH. In addition, the transmission period of the channel status report can be configured via an RRC signal. Therefore, the base station can predict the time slot or subframe in which the PUCCH including the channel status report is transmitted.

[0267] In About Figures 14 to 17 In the description of , as a time slot format, a UL-centric time slot format is exemplified, which represents a case where the number of UL symbols in a single time slot is greater than the number of DL symbols, but the present disclosure is not limited thereto. Figures 14 to 17 The described method can also be applied to time slots that only include UL transmissions. In addition, the DMRS resources allocated for sending DMRS for PUSCH may not be preloaded. In addition, the DMRS resources may be additionally loaded to the front end, and the REs may be loaded at a different location from the front end. This is because additional RSs may be required to improve performance due to high Doppler frequency environments.

[0268] at the same time, Fig.18 FIG. 4 illustrates HARQ-ACK information mapped onto PUSCH resources according to an embodiment of the present disclosure. Fig.14, the UE may send HARQ-ACK information as a kind of UCI through the RE located in the DMRS symbol close to the UL DMRS. This is because the channel estimation performance is higher as it is closer to the DMRS symbol. When sending the PUCCH that allocates uplink transmission resources for the HARQ-ACK information, the base station may expect to receive the HARQ-ACK information from the UE. Here, when the PUCCH is not received, the UE may not multiplex the HARQ-ACK information on the PUSCH. When the PUSCH for sending HARQ-ACK information is sent through the rate-matched PUSCH resources, the base station may also be unable to decode the data other than the HARQ-ACK information received from the UE. This is because, when the PUSCH for sending HARQ-ACK information is sent through the rate-matched PUSCH resources, the rate matching mode may vary depending on whether the HARQ-ACK information is to be sent. Therefore, the HARQ-ACK information can be punctured on the UL-SCH bit stream. When the HARQ-ACK information is punctured, the data that is not punctured on the PUSCH can be decoded regardless of whether the HARQ-ACK information exists or not.

[0269] In addition, refer to Fig.18 , similar to the method for mapping HARQ-ACK information to RE, RI as a kind of UCI can be sent through RE located close to the DMRS symbol. This is because RI is preferentially required in order to analyze the above-mentioned CQI and PMI. As the modulation scheme for RI, the same modulation scheme as the HARQ-ACK information is used. The HARQ-ACK information and RI can be repeated in multiple transmission layers, coated in each layer and then multiplexed. For example, multiple bits representing the HARQ-ACK information and RI can be scrambled in each transmission layer according to different RNTIs. Through this, the UE can obtain diversity gain through multiple transmission layers.

[0270] Channel status reporting on PUSCH resources may be performed irregularly. For example, the base station may configure the UE to send a channel status report. The UE may rate match the UL-SCH based on the presence or absence of a channel status report. For the channel status report, the UE may rate match the UL-SCH to use a relatively high coding rate. In this case, the base station may identify the presence or absence of a channel status report to perform rate matching. This is because the base station requests the channel status report. In addition, when the UE is scheduled to perform PUSCH transmission and the periodic channel status report is configured to be sent on the PUCCH in the subframe in which the PUSCH is sent, the periodic channel status report of the UE may be changed to be sent on the PUSCH resource. In this case, the base station may identify the presence or absence of a periodic channel status report to perform rate matching. This is because the base station may identify in which frame the periodic report is sent. In addition, the transmission time of the periodic report is set by the RRC signal.

[0271] According to an embodiment of the present disclosure, a UE that has received an RRC signal in which a PUSCH-PUCCH configuration parameter is off may not transmit PUSCH and PUCCH at the same time. The parameter indicates whether simultaneous transmission of PUSCH and PUCCH is configured. Here, the UE may piggyback on the PUSCH resource the UCI included in the PUCCH to be transmitted simultaneously with the PUSCH, and then transmit the UCI. In the following, reference will be made to Figures 19 to 23 A description is more specifically provided on a method for a UE according to an embodiment of the present disclosure to piggyback UCI included in a PUCCH on a PUSCH and transmit the UCI.

[0272] Fig.19The diagram shows HARQ-ACK information mapped to PUSCH resources according to an embodiment of the present disclosure. According to an embodiment, the UE may preferentially map the HARQ-ACK information to be sent to the subcarrier corresponding to the symbol following the DMRS symbol. Here, the DMRS symbol may be a symbol assigned to the UL PUSCH DMRS allocated from the base station. Here, the symbol following the DMRS symbol among the subsequent symbols of the DMRS symbol may be adjacent to the DMRS symbol. In addition, the number of REs required for the HARQ-ACK information to be sent by the UE may exceed the number of REs for each symbol of the PUSCH resource. In this case, the UE may additionally map the HARQ-ACK information to the RE of the symbol following the adjacent symbol. This is because the channel estimation performance is higher as it is closer to the position of the DMRS symbol. The UE can compensate for the reduction in channel estimation performance in a higher Doppler frequency environment in which the UE moves quickly and therefore the channel in the time slot changes quickly. In addition, in a wireless communication environment using millimeter waves, the UE may send HARQ-ACK information in the same symbol to obtain beamforming gain for the HARQ-ACK information. This is because, in a millimeter wave environment, beamforming can be performed in the same symbol.

[0273] Fig. 20 1 shows HARQ-ACK information mapped onto PUSCH resources according to an embodiment of the present disclosure. According to an embodiment, DMRS for PUSCH may be allocated to distributed REs on symbols in an interleaved frequency division multiple access (IFDMA) scheme. Fig. 20 As shown in , the DMRS REs used for DMRS can be mapped to resources separated by a preset subcarrier spacing on the same symbol. In this case, the UE can preferentially map the HARQ-ACK information to the REs corresponding to the subcarrier index of the DMRS RE among the REs of the symbols following the DMRS symbol. In addition, the number of REs required to send the HARQ-ACK information by the UE may exceed the number of DMRS REs. In this case, the UE may additionally map the HARQ-ACK information to REs adjacent to the priority mapped REs in the frequency domain among the REs of the symbols following the DMRS symbol. Here, the adjacent REs may be REs corresponding to subcarrier indices that are consecutive from the subcarrier index of the DMRS RE. Alternatively, Fig. 20Different, the UE may additionally map the HARQ-ACK information to an RE adjacent to the DMRS RE in the frequency domain among the REs of the symbol after the DMRS symbol. Alternatively, the UE may preferentially map the HARQ-ACK information to an RE adjacent to the DMRS RE among the REs of the DMRS symbol, and additionally map it to an RE corresponding to the subcarrier index of the DMRS RE. This is because, the closer it is to the position of the DMRS symbol, the higher the channel estimation performance. The UE can compensate for the reduction in channel estimation performance in a higher Doppler frequency environment in which the UE moves rapidly and therefore the channel in the time slot changes rapidly. In addition, in a wireless communication environment using millimeter waves, the UE can send HARQ-ACK information in the same symbol to obtain a beamforming gain for the HARQ-ACK information. This is because, in a millimeter wave environment, beamforming can be performed in the same symbol. In addition, compared with the HARQ-ACK information transmission in the PUSCH resource in the frequency domain, the beamforming gain in the HARQ-ACK information transmission in the PUSCH resource in the frequency domain is reduced. Fig.19 Compared with the embodiment, the UE can additionally obtain frequency diversity gain.

[0274] Fig.21 FIG. 4 illustrates HARQ-ACK information mapped onto PUSCH resources according to an embodiment of the present disclosure. Fig. 20 , the DMRS for PUSCH can be allocated to distributed REs on symbols in the IFDMA scheme. ADMRS REs for DMRS can be mapped to resources separated by a preset subcarrier spacing on the same symbol. In this case, the UE can preferentially map the HARQ-ACK information to the RE corresponding to the subcarrier index of the DMRS RE among the REs of the symbol after the DMRS symbol. In addition, the number of REs required to send the HARQ-ACK information by the UE may exceed the number of DMRS REs. In this case, the UE may additionally map the HARQ-ACK information to the RE corresponding to the subcarrier index of the DMRS RE among the REs of the symbol after the symbol to which a part of the HARQ-ACK information is preferentially mapped. By this, the HARQ-ACK information transmission in the PUSCH resources in the frequency domain is Fig. 20 Compared with the embodiment, the UE can additionally obtain time diversity gain.

[0275] Meanwhile, according to an embodiment of the present disclosure, the antenna ports for the DMRS of the PUSCH may be two or more. Fig. 22 and Fig.23The figure illustrates UCI mapped to PUSCH resources when two or more antenna ports are allocated to DMRS according to an embodiment of the present disclosure. The base station may allow the UE to form two or more DMRS antenna ports for the PUSCH. The UE may send DMRS through multiple transmission layers using the other two antenna ports configured by the base station. In this case, the UE may map the UCI sent through the PUSCH to the PUSCH resources based on the REs allocated for DMRS transmission for each antenna port. In addition, the configuration type of REs used for DMRS may be changed according to CP-OFDM and DFT-S-OFDM as the waveform used in the uplink. Therefore, the UE may map the UCI to the PUSCH resources based on the antenna port related information and the information about the waveform.

[0276] A UE using a DFT-S-OFDM waveform in the uplink can send frequency resources allocated to the PUSCH using a Zardoff-Chu sequence in a specific symbol of the DMRS. Alternatively, a UE using a DFT-S-OFDM waveform in the uplink can send a DMRS based on a PUSCH DMRS structure in an IFDMA scheme. This is because another UE using a CP-OFDM waveform can send a DMRS based on a PUSCH DMRS structure in an IFDMA scheme. In this case, regardless of the waveform, the UE can map UCI to PUSCH resources in the same way. First, according to an embodiment of the present disclosure, a method for mapping HARQ-ACK information to PUSCH resources will be described regardless of whether the waveform used in the uplink is a CP-OFDM waveform or a DFT-S-OFDM waveform.

[0277] refer to Fig. 22, the UE may preferentially map the HARQ-ACK information to the first antenna port (antenna port 0) configured to transmit on the first layer among the antenna ports of the DMRS. The UE preferentially maps the HARQ-ACK information to the RE with the same subcarrier index as the subcarrier index of the RE corresponding to the first antenna port among the REs of the symbols after the DMRS symbol. This is because the DFT-S-OFDM waveform is limited to single-stream transmission, and CP-OFDM transmission can also be sent by single-stream transmission when the SNR is low. In addition, the number of REs required to send the HARQ-ACK information by the UE may exceed the number of DMRS REs corresponding to the first antenna port of the DMRS. In this case, the UE may additionally map the HARQ-ACK information to the REs of the symbols after the DMRS symbol that are adjacent to the REs mapped preferentially in the frequency domain. Here, the adjacent RE may be an RE corresponding to a subcarrier index that is continuous from the subcarrier index of the DMRS RE. This is because the channel estimation performance is higher as it is closer to the position of the DMRS symbol. The UE can compensate for the reduction in channel estimation performance in a higher Doppler frequency environment where the UE moves quickly and thus the channel in the time slot changes quickly. In addition, in a wireless communication environment using millimeter waves, the UE can send HARQ-ACK information in the same symbol to obtain beamforming gain for the HARQ-ACK information.

[0278] refer to Fig.23 , the UE may preferentially map the HARQ-ACK information to the first antenna port (antenna port 0) configured to transmit on the first layer among the antenna ports of the DMRS. Fig. 22 , the number of REs required for the UE to send HARQ-ACK information may exceed the number of REs corresponding to the first antenna port of the DMRS. In this case, the UE may additionally map the HARQ-ACK information to the REs corresponding to the first antenna of the DMRS among the REs of the symbols after the symbols to which a portion of the HARQ-ACK information is preferentially mapped. By this, the HARQ-ACK information transmission in the PUSCH resource in the frequency domain is Fig. 22 Compared with the embodiment, the UE can additionally obtain time diversity gain.

[0279] Hereinafter, according to an embodiment of the present disclosure, the perforation and rate matching of PUSCH resources when HARQ-ACK information is mapped to PUSCH resources to be transmitted will be described. According to an embodiment, when the UE is configured to map UCI to the PUSCH resources allocated to the UE, the base station may configure the PUSCH resources on which the UCI is mapped to always be perforated. Alternatively, the base station and the UE are allowed to switch on / off the simultaneous transmission of PUCCH and PUSCH through an RRC signal, and thus the base station can identify whether the UCI is sent through PUSCH or PUCCH. In this case, the PUSCH resource to which the UCI is mapped may be configured to always perform rate matching. At the same time, in the case where the UE does not receive DTX of the PDCCH as scheduling information from the base station, the base station may expect to send HARQ-ACK information, and rate matching may be performed to decode the UL-SCH. Here, when the PDCCH is not received, the UE may not be configured to send HARQ-ACK information. In this case, in decoding of the UL-SCH transmitted from the UE through the PUSCH by the base station, a mismatch in rate matching may occur between the base station and the UE.

[0280] In addition, when UCI is mapped to REs on PUSCH resources and is configured to be transmitted by the UE, such as Figures 19 to 21 As shown in , the application of puncturing or rate matching in the PUSCH resource can be changed for each UCI type. For example, for a PUSCH resource through which at least HARQ-ACK information is sent, the base station may configure the UE to puncture the PUSCH resource. On the other hand, for a PUSCH resource through which UCI (at least one of CQI, RI, PMI, and beam-related information) other than HARQ-ACK information is sent, the base station may configure the UE to perform rate matching on the PUSCH resource. When DL transmission is lost, the UE may not send HARQ-ACK information. Instead, the base station may expect to receive HARQ-ACK information. Therefore, when the PUSCH resource for sending HARQ-ACK information is configured for rate matching and DL transmission is lost, the base station may not be able to decode the UCI in addition to the HARQ-ACK information sent through the PUCCH. In contrast, when the PUCCH includes only the transmission of a channel state report such as CQI, RI, PMI, or beam-related information, no mismatch occurs even when the PUSCH resource is rate matched.

[0281] Hereinafter, a method for mapping RI to PUSCH resources according to an embodiment of the present disclosure will be described. RI can be mapped to PUSCH resources in association with a manner in which HARQ-ACK information is mapped to PUSCH resources, which is accomplished by Figures 19 to 21For example, on the PUSCH resource, the RI may be mapped to consecutive REs in the time domain or frequency domain in the RE to which the HARQ-ACK information is mapped. According to an embodiment, in the allocated PUSCH resource, the RI may be sequentially mapped starting from the RE of the symbol after the symbol including the last RE among the REs to which the HARQ-ACK information is sequentially mapped. Here, the method in which the HARQ-ACK information is sequentially mapped may be by Fig.19 , Fig. 20 or Fig.21 In addition, the UE may map the HARQ-ACK information to the RE of the corresponding symbol in a method that is the same as or corresponds to the method of sequentially mapping the HARQ-ACK information, which is described by 19, 20, or 21.

[0282] According to another embodiment, RI may be sequentially mapped from REs adjacent to the last RE in the same symbol as the symbol of the last RE among REs to which HARQ-ACK information is sequentially mapped. In addition, RI may also be mapped starting from the symbol after the symbol to which HARQ-ACK information is mapped. For example, when the symbol in which DMRS is transmitted is the first symbol and the symbol in which HARQ-ACK information is transmitted is the second symbol, RI may be mapped to the third symbol. In addition, RI may be mapped to the RE corresponding to the subcarrier index of the allocated DMRS among REs of the third symbol in a scheme similar to the mapping method of HARQ-ACK information.

[0283] Hereinafter, a method for mapping beam-related information to PUSCH resources will be described according to an embodiment of the present disclosure. According to an embodiment, the beam-related information may be mapped to symbols other than the PUSCH resources to which the HARQ-ACK information and RI are mapped. Here, in addition to the HARQ-ACK information and RI, the beam-related information may be mapped to the RE to which the DMRS is mapped closest in the UCI. In addition, among the symbols on the UL time slot, the beam-related information may be mapped to the most dominant symbol in addition to the RE to which the HARQ-ACK information and RI are mapped. The base station and the UE are required to match the beam-related information with each other for DL / UL beamforming, and are therefore preferably sent at the front end.

[0284] Hereinafter, a method for mapping channel state information such as CQI / PMI to PUSCH resources will be described according to an embodiment of the present disclosure. According to an embodiment, the channel state information may be mapped to a symbol to be transmitted after HARQ-ACK information, RI, and beam-related information in a PUSCH resource. This is because in a millimeter wave system, the beamforming direction of each symbol may be different, and a system below 6 GHz and a system using 6 GHz or higher millimeter waves do not adopt different methods from each other.

[0285] On the other hand, according to an embodiment of the present disclosure, the UE may indicate information indicating whether the transmission PUSCH resource relative to the HARQ-ACK information mapped to the PUSCH resource is rate matched. As described above, in the case where the base station expects to receive HARQ-ACK information from the UE, the UE may not send the HARQ-ACK information due to DTX, etc. This is because, when the transmission resource is rate matched, information mismatch may occur between the base station and the UE. Hereinafter, a description will be provided of a method for explicitly or implicitly indicating rate matching related information, which indicates whether the UE performs rate matching on the PUSCH resource.

[0286] According to an embodiment, when the HARQ-ACK information is mapped to the PUSCH resources and then transmitted, the UE may rate match the PUSCH resources. For example, the UE may determine whether to perform rate matching based on the PDCCH that schedules the PDSCH to be transmitted from the base station. In detail, when the HARQ-ACK information corresponding to the PDSCH is set to 3 bits or more, the UE may rate match the PUSCH resources. In addition, when configured to perform rate matching on the HARQ-ACK information corresponding to the PDSCH, the UE may rate match the PUSCH resources. In this case, in order to prevent mismatch, the base station may perform decoding in a scheme in which the UE assumes rate matching for the PUSCH and in a scheme in which rate matching is not assumed. This may increase the complexity of the base station.

[0287] According to an embodiment, the UE can explicitly indicate rate matching related information through L1 signaling. More specifically, the UE can use a short PUCCH format on the time slot (UL time slot or UL-centered time slot) through which the PUSCH to be sent is sent to indicate whether the UL-SCH is rate matched on the corresponding PUSCH RE. When the rate matching related information is sent using the short PUCCH format, the rate matching related information can be set to be sent by the first symbol or the first and second symbols in the time slot set to be TDMed with the PUSCH. In addition, the rate matching related information can be set to be sent using a short PUCCH format through the first symbol starting from the last symbol or the first and second symbols starting from the last symbol in the time slot set to be TDMed with the PUSCH. The base station can decode the PUCCH that has been sent from the UE to obtain rate matching related information. In addition, the base station can be configured to perform PUSCH decoding based on the rate matching related information to ensure PUSCH decoding performance.

[0288] According to another embodiment, the UE may implicitly indicate rate matching related information. For example, when the PUSCH resource is rate matched relative to the transmission of the HARQ-ACK information mapped to the PUSCH resource according to the configuration of the base station, the UE may apply phase rotation and / or constellation rotation to other data on the PUSCH resource, or UCI on the PUSCH resource, and then send the other data or UCI. Alternatively, the UE may apply phase rotation and / or constellation rotation to the DMRS for PUSCH demodulation, and then send the DMRS. Alternatively, when using a DFT-S-OFDM waveform, the UE may be configured to send the DMRS using a sequence cyclically shifted from a base sequence based on a CS value determined by a preset method. Here, the preset method may be a method for determining the CS value of the Zardoff-Chu sequence of the DMRS for demodulating the PUSCH assigned to the UE as the CSI value from the base station with the farthest interval from the CS value indicated by the DCI. Alternatively, the UE may be configured to apply a phase rotation and / or a constellation rotation to a subset of at least one of data, UCI, or DMRS on a PUSCH resource, and then transmit the subset. When a phase rotation and / or a constellation rotation for a subset of at least one of data, UCI, or DMRS is detected on a PUSCH resource, the base station may determine that rate matching related information has been received. For example, when a phase rotation and / or a constellation rotation for a subset of at least one of data, UCI, or DMRS is detected on a PUSCH resource, the base station may determine that the PUSCH to which the HARQ-ACK information is mapped has been rate matched and transmitted. In addition, the UE may change a preset scrambling sequence that is applied to a subset of at least one of data, UCI, or DMRS on a PUSCH resource to indicate rate matching related information.

[0289] According to the wireless communication system of the embodiment of the present disclosure, in particular, the cellular wireless communication system provides a method and device for effectively transmitting a signal. In addition, according to the wireless communication system of the embodiment of the present disclosure, a wireless communication method and device for transmitting and receiving an uplink control channel are provided.

[0290] The method and system of the present disclosure are described with respect to specific embodiments, and a computer system having a general hardware architecture may be used to implement configuration elements, part, or all operations of the present disclosure.

[0291] The foregoing description of the present disclosure has been given for the purpose of illustration and description. It is obvious to those of ordinary skill in the art to which the present disclosure relates that the present disclosure can be easily modified into other detailed forms without changing the technical principles or basic features of the present disclosure. Therefore, these embodiments as described above are proposed only for illustrative purposes and do not limit the present disclosure. For example, each component described as a single type can be implemented in a distributed manner. Similarly, the components described as distributed can be implemented in a combined manner.

[0292] The scope of the present disclosure is set forth by the appended claims rather than the foregoing description. It should be understood that all changes or modifications derived from the definition and scope of the claims and their equivalents fall within the scope of the present disclosure.

Claims

1. A user equipment (UE) in a wireless communication system, the UE include: Communication module; and a processor, the processor being used to control the operation of the communication module, Wherein, the processor is configured to: sending uplink control information (UCI), wherein the uplink control information includes hybrid automatic repeat request confirmation (HARQ-ACK) information, a scheduling request (SR), and a beam recovery request (BR), wherein the hybrid automatic repeat request confirmation (HARQ-ACK) information indicates a response to a downlink channel received from a base station, the scheduling request (SR) indicates whether to request uplink resource allocation, and the beam recovery request (BR) indicates whether to request recovery from a beam failure, When the number of bits of the UCI does not exceed 2, the UCI is transmitted using a physical uplink control channel (PUCCH) format 0 generated by cyclically shifting a base sequence based on a second cyclic shift (CS) value, wherein the first CS value is determined based on the HARQ-ACK information, wherein the CS offset is determined based on request information representing a request to be sent from the UE to the base station, The second CS value represents a degree of cyclic shift of a basic sequence to be used in the PUCCH format 0 based on the first CS value and the CS offset, and When the number of bits of the UCI exceeds 2, the UCI is sent using PUCCH format 2, wherein the UCI includes one or more bits indicating HARQ-ACK information, one or more bits indicating the SR, and one or more bits indicating the BR; The PUCCH resources used for the SR and the PUCCH resources used for the BR are independently configured.

2. The UE according to claim 1, wherein the second CS value is any one of a plurality of CS values ​​determined according to the CS offset and the number of bits representing the HARQ-ACK information, The plurality of CS values ​​are configured with CS values ​​that are different from each other and increase at the same interval based on a minimum CS value among the plurality of CS values, and Regardless of whether the SR is a positive SR or not, the size of the interval is constant.

3. The UE according to claim 2, in, The base sequence is cyclically shifted to have N CS values ​​that are different from each other, The HARQ-ACK information includes m bits, and The size of the interval is N / (2^m). The UE according to claim 3 , wherein m is 2 and N is 12.

5. The UE according to claim 4, in, When the SR is the positive SR, the CS offset is 1, and When the SR is not the positive SR, the CS offset is 0.

6. The UE according to claim 5, in, When the SR is not the positive SR, the second CS value is one of 0, 3, 6 and 9.

7. The UE according to claim 6, in, When the SR is the positive SR, the second CS value is one of 1, 4, 7 and 10.

8. The UE according to claim 1, in, The SR is multiplexed with a beam restoration request (BR) indicating whether restoration is requested for beam failure, and The processor is configured to: when the BR is not a positive BR for beam failure recovery request, send UCI using the PUCCH format 0 through a first PUCCH resource configured to send the SR and the HARQ-ACK information, and When the BR is the positive BR, the UCI is transmitted using the PUCCH format 0 through a second PUCCH resource configured to transmit the BR other than the first PUCCH resource.

9. The UE according to claim 1, in, The processor is configured to obtain an initial cyclic shift value, calculating a phase value of the base sequence cyclically shifted based on an initial CS value and the second CS value, and The sequence is generated by cyclically shifting the base sequence by the phase value.

10. A wireless communication method operated by a user equipment (UE) in a wireless communication system, the wireless communication method include: sending uplink control information (UCI), wherein the uplink control information includes hybrid automatic repeat request confirmation (HARQ-ACK) information, a scheduling request (SR), and a beam recovery request (BR), wherein the hybrid automatic repeat request confirmation (HARQ-ACK) information indicates a response to a downlink channel received from a base station, the scheduling request (SR) indicates whether to request uplink resource allocation, and the beam recovery request (BR) indicates whether to request recovery from a beam failure, When the number of bits of the UCI does not exceed 2, the UCI is transmitted using a physical uplink control channel (PUCCH) format 0 generated by cyclically shifting a base sequence based on a second cyclic shift (CS) value, wherein the first CS value is determined based on the HARQ-ACK information, wherein the CS offset is determined based on request information representing a request to be sent from the UE to the base station, The second CS value represents a degree of cyclic shift of a basic sequence to be used in the PUCCH format 0 based on the first CS value and the CS offset, and When the number of bits of the UCI exceeds 2, the UCI is sent using PUCCH format 2, wherein the UCI includes one or more bits indicating HARQ-ACK information, one or more bits indicating the SR, and one or more bits indicating the BR; The PUCCH resources used for the SR and the PUCCH resources used for the BR are independently configured.

11. The method according to claim 10, in, The second CS value is any one of a plurality of CS values ​​determined according to the CS offset and the number of bits representing the HARQ-ACK information, The plurality of CS values ​​are configured with CS values ​​that are different from each other and increase at the same interval based on a minimum CS value among the plurality of CS values, and Regardless of whether the SR is a positive SR or not, the size of the interval is constant.

12. The method according to claim 11, in, The base sequence is cyclically shifted to have N CS values ​​that are different from each other, The HARQ-ACK information includes m bits, and The size of the interval is N / (2^m).

13. The method according to claim 12, in, When the SR is the positive SR, the CS offset is 1, and When the SR is not the positive SR, the CS offset is 0.

14. The method according to claim 13, in, When the SR is not the positive SR, the second CS value is one of 0, 3, 6 and 9.

15. The method according to claim 14, in, When the SR is the positive SR, the second CS value is one of 1, 4, 7 and 10.

16. The method according to claim 10, in, The SR is multiplexed with a beam restoration request (BR) indicating whether restoration is requested for beam failure, and Using the PUCCH format 0 to send the UCI includes: When the BR is not a positive BR for beam failure recovery request, transmitting the PUCCH format 0 through a first PUCCH resource configured to transmit the SR and the HARQ-ACK information; and When the BR is the positive BR, the UCI is transmitted using the PUCCH format 0 through a second PUCCH resource configured to transmit the BR other than the first PUCCH resource.

Images