Method and apparatus for transmitting signal in wireless communication system

Abstract

The present invention relates to a wireless communication system, and in particular, to a method comprising the steps of: receiving control information for transmitting a PUSCH, the control information comprising FDRA information; transmitting the PUSCH in a first RB set corresponding to a first hop in the UL BWP, the first RB set being determined based on the FDRA information; and transmitting the PUSCH in a second RB set corresponding to a second hop within the UL BWP, where the second RB set is adaptively determined based on whether the second hop is in an SBFD slot in the time domain; and a wireless device for the method.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system, and more particularly to a method for sending a signal in a wireless communication system and a device using the method. Background Art

[0002] After the commercialization of the fourth generation (4G) communication system, in order to meet the increasing demand for wireless data services, efforts are being made to develop a new fifth generation (5G) communication system. The 5G communication system is referred to as an ultra-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 in a millimeter wave (mmWave) band of 6 GHz or higher, and includes a communication system operating in a band of 6 GHz or lower in terms of ensuring coverage, so that the implementation in the base station and the terminal is under consideration.

[0003] The 3rd Generation Partnership Project (3GPP) NR system improves the spectrum efficiency of the network and enables communication providers to provide more data and voice services over a given bandwidth. Therefore, the 3GPP NR system is designed to meet the demand for high-speed data and media transmission in addition to supporting a large amount of voice. 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 low operating costs due to an enhanced end-user environment and simple architecture.

[0004] 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 more 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.

[0005] In order to reduce the path loss of radio waves and increase the transmission distance of radio waves in the mmWave band, in the 5G communication system, beamforming, massive multiple input / output (massive MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, hybrid beamforming combining analog beamforming and digital beamforming, and massive antenna technology are discussed. In addition, for the network improvement of the system, in the 5G communication system, technology development related to evolved small cells, advanced small cells, cloud radio access networks (cloud RAN), ultra-dense networks, device-to-device communication (D2D), vehicle-to-everything communication (V2X), wireless backhaul, non-terrestrial network communication (NTN), mobile networks, cooperative communication, coordinated multipoint (CoMP), interference cancellation, etc. is being carried out. 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 being developed.

[0006] Meanwhile, in a human-centered connection network where humans 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 emerging. In order to realize IoT, technical elements such as sensing technology, wired / wireless communication and network infrastructure, service interface technology and security technology are required, so that in recent years, technologies such as sensor networks, machine-to-machine (M2M) and machine type communication (MTC) have been studied to connect between objects. In the IoT environment, it is possible to provide intelligent Internet technology (IT) services that collect and analyze data generated from networked objects to create new value in human life. Through the integration and mixing of existing information technology (IT) and various industries, IoT can be applied to fields such as smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, health care, smart home appliances and advanced medical services.

[0007] 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. The application of cloud RAN, which is the above-mentioned big data processing technology, is an example of the fusion of 5G technology and IoT technology. In general, mobile communication systems are developed to provide voice services while ensuring the activities of users.

[0008] However, mobile communication systems are gradually expanding not only voice services but also data services, and have 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

[0009] Technical issues

[0010] The present disclosure is to provide a method for efficiently transmitting a signal in a wireless communication system, and a device using the method. Specifically, the present disclosure is to provide a frequency hopping method for efficiently performing transmission in a wireless communication system, and a device using the method.

[0011] Technical Solution

[0012] One aspect of the present disclosure provides a UE used in a wireless communication system, wherein the UE includes a communication module and a processor configured to control the communication module. The processor is configured to: receive control information for sending a physical uplink shared channel (PUSCH), wherein the control information includes frequency domain resource assignment (FDRA) information, send the PUSCH in a first resource block (RB) set corresponding to a first hop in an uplink (UL) bandwidth part (BWP), wherein the first RB set is determined based on the FDRA information, and send the PUSCH in a second RB set corresponding to a second hop in the UL BWP, wherein when the second hop belongs to a subband non-overlapping full-duplex (SBFD) symbol set in the time domain, the second RB set is determined based on a value satisfying the following formula 1. Formula 1: M mod N size UL +RB start,UL , where M represents the start +RB offset ) value, RB start Indicates the starting RB index of the first RB set, RB offset Represents a value from 0 to N size BWP -1 offset, and N size BWP Indicates the number of RBs in UL BWP, N size UL represents the number of RBs of the UL subband in the SBFD symbol set, and RB start,UL Represents the index of the RB with the smallest index among the RBs of the UL subband within the UL BWP in the SBFD symbol set.

[0013] One aspect of the present disclosure provides a method used by a UE in a wireless communication system. The method includes: receiving control information for sending a physical uplink shared channel (PUSCH), wherein the control information includes frequency domain resource assignment (FDRA) information; sending the PUSCH in a first resource block (RB) set corresponding to a first hop in an uplink (UL) bandwidth part (BWP), wherein the first RB set is determined based on the FDRA information; and sending the PUSCH in a second RB set corresponding to a second hop in the UL BWP, wherein when the second hop belongs to a subband non-overlapping full-duplex (SBFD) symbol set in the time domain, the second RB set is determined based on a value satisfying the following formula 1. Formula 1: M mod N size UL +RB start,UL , where M represents the value based on (RB start +RB offset ) value, RB start Indicates the starting RB index of the first RB set, RB offset Represents a value from 0 to N size BWP -1 offset, and N size BWP Indicates the number of RBs in UL BWP, N size UL represents the number of RBs of the UL subband in the SBFD symbol set, and RB start,UL Represents the index of the RB with the smallest index among the RBs of the UL subband within the UL BWP in the SBFD symbol set.

[0014] One aspect of the present disclosure provides a base station for use in a wireless communication system, wherein the base station includes a communication module and a processor configured to control the communication module. The processor: sends control information for receiving a physical uplink shared channel (PUSCH), wherein the control information includes frequency domain resource assignment (FDRA) information, receives the PUSCH in a first resource block (RB) set corresponding to a first hop in an uplink (UL) bandwidth part (BWP), wherein the first RB set is determined based on the FDRA information, and receives the PUSCH in a second RB set corresponding to a second hop in the UL BWP, wherein when the second hop belongs to a subband non-overlapping full-duplex (SBFD) symbol set in the time domain, the second RB set is determined based on a value satisfying the following formula 1. Formula 1: M mod N size UL +RB start,UL , where M represents the start +RB offset ) value, RB start Indicates the starting RB index of the first RB set, RBoffset Represents a value from 0 to N size BWP -1 offset, and N size BWP Indicates the number of RBs in UL BWP, N size UL represents the number of RBs of the UL subband in the SBFD symbol set, and RB start,UL Represents the index of the RB with the smallest index among the RBs of the UL subband within the UL BWP in the SBFD symbol set.

[0015] One aspect of the present disclosure provides a method used by a base station in a wireless communication system. The method includes: sending control information for receiving a physical uplink shared channel (PUSCH), wherein the control information includes frequency domain resource assignment (FDRA) information; receiving the PUSCH in a first resource block (RB) set corresponding to a first hop in an uplink (UL) bandwidth part (BWP), wherein the first RB set is determined based on the FDRA information; and receiving the PUSCH in a second RB set corresponding to a second hop in the UL BWP, wherein when the second hop belongs to a subband non-overlapping full-duplex (SBFD) symbol set in the time domain, the second RB set is determined based on a value satisfying the following formula 1. Formula 1: M mod N size UL +RB start,UL , where M represents the value based on (RB start +RB offset ) value, RB start Indicates the starting RB index of the first RB set, RB offset Represents a value from 0 to N size BWP -1 offset, and N size BWP Indicates the number of RBs in UL BWP, N size UL represents the number of RBs of the UL subband in the SBFD symbol set, and RB start,UL Represents the index of the RB with the smallest index among the RBs of the UL subband within the UL BWP in the SBFD symbol set.

[0016] Preferably, when the second hop belongs to a non-SBFD symbol set in the time domain, the second RB set may be determined based on a value satisfying the following formula 2: Formula 2: (RB start +RB offset )mod N size BWP .

[0017] Preferably, M may include (RB start +RBoffset -RB start,UL ).

[0018] Preferably, the SBFD symbol set may include a UL subband and a DL subband that are frequency division multiplexed (FDMed) in the frequency domain, and an RB with a lowest index in the UL subband may be located within the UL BWP.

[0019] Preferably, no matter whether the first hop belongs to a SBFD symbol set or a non-SBFD symbol set in the time domain, the first RB set can be determined identically based on the FDRA information.

[0020] Beneficial effects of the present invention

[0021] The present disclosure provides a method for efficiently transmitting a signal in a wireless communication system, and a device using the method. In addition, the present disclosure provides a frequency hopping method for efficiently performing transmission in a wireless communication system, and a device using the method.

[0022] Effects obtainable from the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood from the following description by those skilled in the art to which the present disclosure belongs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 An example of a radio frame structure used in a wireless communication system is illustrated.

[0024] Figure 2 An example of a downlink (DL) / uplink (UL) slot structure in a wireless communication system is illustrated.

[0025] Figure 3 A diagram for explaining physical channels used in a 3GPP system and a typical signal transmission method using the physical channels.

[0026] Figure 4a and Figure 4b The figure shows the SS / PBCH blocks used for initial cell access in the 3GPP NR system.

[0027] Figure 5a and Figure 5b Illustration of a process for transmitting control information and a control channel in a 3GPP NR system.

[0028] Figure 6 Illustration of a control resource set (CORESET) in which a physical downlink control channel (PDCCH) can be transmitted in a 3GPP NR system.

[0029] Figure 7 A method for configuring a PDCCH search space in a 3GPP NR system is illustrated.

[0030] Figure 8 is a conceptual diagram illustrating carrier aggregation.

[0031] Fig. 9 is a diagram for explaining single-carrier communication and multi-carrier communication.

[0032] Fig.10 is a diagram showing an example in which a cross-carrier scheduling technology is applied.

[0033] Fig.11 is a block diagram showing the configuration of a UE and a base station according to an embodiment of the present disclosure.

[0034] Figures 12 to 18 The figure shows the sub-band configuration method.

[0035] Figure 19 to Figure 20 The problem that occurs during frequency hopping in resources configured or allocated for subbands is illustrated.

[0036] Figure 21 to Figure 29 A frequency hopping method in resources configured or allocated for a subband according to an example of the present disclosure is illustrated. DETAILED DESCRIPTION

[0037] The terms used in the specification adopt the currently widely used general terms as much 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 certain 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 disclose that the terms used in the specification should not be analyzed based only on the names of the terms, but should be analyzed based on the substantial meanings of the terms and contents in the entire specification.

[0038] Throughout the specification and the claims that follow, when it is described that an element is "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 elements without implying the exclusion of any other elements. Furthermore, in some exemplary embodiments, limitations such as "greater than or equal to" or "less than or equal to" based on a specific threshold value may be appropriately replaced with "greater than" or "less than", respectively.

[0039] The following technologies can be used in various wireless access systems: such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier-FDMA (SC-FDMA), etc. CDMA can be implemented by wireless technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented by wireless technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented by wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, 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 Evolved UMTS (E-UMTS) using 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 low-latency communication (URLLC), and massive machine type communication (mMTC) services as 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.

[0040] Unless otherwise specified in this specification, a base station may refer to a next generation node B (gNB) as defined in 3GPP NR. In addition, unless otherwise specified, a terminal may refer to a user equipment (UE). In the following, in order to facilitate the understanding of the description, each content is divided into embodiments and described separately, but each of the embodiments may be used in combination with each other. In the present disclosure, the configuration of the UE may indicate the configuration by the base station. Specifically, the base station may send a channel or a signal to the UE to configure the operation of the UE or a parameter value used in the wireless communication system.

[0041] Figure 1 An example of a radio frame structure used in a wireless communication system is illustrated.

[0042] refer to Figure 1 , the radio frame (or radio frame) used in the 3GPP NR system may have a 10ms (Δf max N f / 100)*T c ) length. In addition, the wireless frame includes 10 subframes (SF) of equal size. Here, Δf max =480*103 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 assigned to 10 subframes in one radio frame respectively. 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 configuration. That is, 15kHz, 30kHz, 60kHz, 120kHz, and 240kHz can be used for subcarrier spacing. One subframe with a length of 1ms may include 2 μ time slots. In this case, the length of each time slot is 2 -μ ms. It can be from 0 to 2 μ -1 are assigned to the 2 μ In addition, the time slots from 0 to 10*2 μ Numbers of -1 are respectively allocated to time slots in a radio frame. 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).

[0043] Figure 2 An 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.

[0044] There is one resource grid per antenna port. Figure 2 , a time slot includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in the time domain and a plurality of resource blocks (RBs) in the frequency domain. An OFDM symbol also refers to a symbol interval. Unless otherwise specified, an OFDM symbol may be referred to simply as a symbol. An RB includes 12 consecutive subcarriers in the frequency domain. Reference 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. Nsize,μ grid,x represents the number of resource blocks (RBs) according to the subcarrier spacing component μ (x is DL or UL), and N slot symb N represents the number of OFDM symbols in a time slot. RB sc is the number of subcarriers constituting one RB and N RB sc = 12. The OFDM symbol may be called a cyclic shift OFDM (CP-OFDM) symbol or a discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol according to a multiple access scheme.

[0045] 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 at a 60kHz subcarrier spacing. Figure 2 In the embodiment, for the convenience of description, one time slot is configured with 14 OFDM symbols as an example, but the embodiments of the present disclosure can be applied to time slots with different numbers of OFDM symbols in a similar manner. Figure 2 , each OFDM symbol includes N size,μ grid,x *N RB sc subcarriers. The types of subcarriers can be divided into data subcarriers for data transmission, reference signal subcarriers for transmission of reference signals, and guard bands. The carrier frequency is also called the center frequency (fc).

[0046] An RB can be composed of N RB sc For reference, a resource configured with one OFDM symbol and one subcarrier may be referred to as a resource element (RE) or tone. Thus, one RB can be configured with N slot symb *N RB sc 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 is the assigned index, and l can be from 0 to N in the time domain slot symb –1 The assigned index.

[0047] 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 is able to determine the time and frequency parameters necessary to demodulate the DL signal and send the UL signal at the correct time.

[0048] 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 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, and 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.

[0049] Information about the type of each symbol, i.e., information indicating any one of a DL symbol, a UL symbol, and a flexible symbol, may be configured using a cell-specific or common radio resource control (RRC) signal. In addition, information about the type of each symbol may be additionally configured using 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 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 from the end of the period of the cell-specific time slot configuration, and v) the number of UL symbols from the last symbol of the time slot immediately preceding the time slot having only UL symbols. Here, a symbol that is not configured with any one of the UL symbol and the DL symbol is a flexible symbol.

[0050] When the 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 with a 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 corresponding time slot N slot symbThe number of UL symbols among the symbols. In this case, the DL symbols of the time slot can be continuously configured from 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 from 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 symbols and DL symbols is a flexible symbol.

[0051] 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.

[0052] If the power of the UE is turned on or the UE camps on a new cell, the UE performs initial cell search (S101). Specifically, the UE can synchronize with the BS in the initial cell search. To this end, the UE can 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 the cell ID. Thereafter, the UE can receive a physical broadcast channel from the base station and obtain broadcast information in the cell.

[0053] After the initial cell search is completed, the UE receives a physical downlink shared channel (PDSCH) according to the physical downlink control channel (PDCCH) and the information in the PDCCH, so that the UE can obtain more specific system information than the system information obtained through the initial cell search (S102). Here, the system information received by the UE is cell common system information in radio resource control (RRC) for the UE to operate properly at the physical layer, and is referred to as remaining system information (RSMI) or system information block (SIB) 1.

[0054] When the UE initially accesses the base station or does not have radio resources for signal transmission (when the UE is in RRC_IDLE mode), 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 via the PDCCH (S105). Next, the UE waits for the reception of 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 is terminated. During the random access procedure, the UE may obtain UE-specific system information necessary for the UE to operate properly at the physical layer in the RRC layer. When the UE obtains the UE-specific system information from the RRC layer, the UE enters the RRC_CONNECTED mode.

[0055] The RRC layer is used for message generation and management to control between the UE and the radio access network (RAN). More specifically, in the RRC layer, the base station and the UE can perform broadcasting of cell system information, delivery management of paging messages, mobility management and switching, measurement reporting and its control, UE capability management, and storage management including existing management necessary for all UEs in the cell. Generally, since the update of the signal sent from the RRC layer (hereinafter referred to as the RRC signal) is longer than the transmission / reception period (i.e., transmission time interval, TTI) in the physical layer, the RRC signal can remain unchanged for a long time.

[0056] 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 general 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 according to 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), etc. Here, CQI, PMI and RI may be included in channel state information (CSI). In the 3GPP NR system, the UE can send control information such as the above-mentioned HARQ-ACK and CSI through PUSCH and / or PUCCH.

[0057] Figure 4a and Figure 4b Illustration of SS / PBCH blocks used for initial cell access in a 3GPP NR system.

[0058] When the power is turned on or when the UE wants to access a new cell, it can obtain time and frequency synchronization with the cell and perform an initial cell search process. During the cell search process, the UE can detect the physical cell identity N of the cell. 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 is able to obtain information such as a cell identity (ID).

[0059] refer to Figure 4a , 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 As shown in Table 1, 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 and the SSS is sent in the third OFDM symbol through the 56th to 182nd subcarriers. 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 subcarriers and the 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 subcarriers and the 183rd to 191st subcarriers. The base station sends the physical broadcast channel (PBCH) through the remaining REs in the SS / PBCH block except for the above signals.

[0060] [Table 1]

[0061]

[0062] The SS 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, through a combination of three PSS and SSS, specifically so that each physical layer cell ID will be part of only one physical layer cell identifier group. cell ID =3N (1) ID+N (2) ID The physical layer cell identifier group can be indicated 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 the 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.

[0063] d PSS (n) = 1-2x(m)

[0064]

[0065] 0≤n<127

[0066] Here, x(i+7)=(x(i+4)+x(i))mod2

[0067] 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].

[0068] In addition, the sequence d of SSS SSS (n) are as follows.

[0069]

[0070] here, and is given as

[0071] [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]

[0072] [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]

[0073] 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 may be any one 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, at a carrier frequency of 3GHz or lower, n=0 or 1. 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 lower, 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 starting time point of the SS / PBCH block is the ({2, 8}+14*n)th symbol. In this case, at a carrier frequency of 3 GHz or lower, n=0 or 1. In addition, at a carrier frequency higher than 3 GHz and lower than 6 GHz, it can be n=0, 1, 2, 3. In case D, the subcarrier spacing is 120 kHz and the starting 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 6 GHz 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 240 kHz and the starting 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.

[0074] Figure 5a and Figure 5b This figure shows the process of sending control information and control channels in the 3GPP NR system. Figure 5a, the base station may add a cyclic redundancy check (CRC) masked (e.g., XORed) with a radio network temporary identifier (RNTI) to control information (e.g., downlink control information (DCI)) (S202). The base station may scramble the CRC with an RNTI value determined according to the purpose / target of each control information. The common RNTI used by one or more UEs can 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) (S204) (S206). Thereafter, the base station may multiplex DCI based on a PDCCH structure based on a control channel element (CCE) (S208). In addition, the base station may apply additional processes such as scrambling, modulation (e.g., QPSK), interleaving, etc. to the multiplexed DCI (S210), 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 5b : is a diagram related to CCE aggregation level and multiplexing of PDCCH, and illustrates the type of CCE aggregation level for one PDCCH and CCEs transmitted in the control region accordingly.

[0075] Figure 6 Illustration of a control resource set (CORESET) in which a physical downlink control channel (PDCCH) can be transmitted in a 3GPP NR system.

[0076] A CORESET is a time-frequency resource in which a PDCCH (i.e., a control signal for a UE) is transmitted. In addition, a search space to be described later may be mapped to one CORESET. Therefore, the UE may monitor the time-frequency domain designated as a CORESET instead of monitoring all frequency bands for PDCCH reception, and decode the PDCCH mapped to the CORESET. The base station may configure one or more CORESETs for each cell to the UE. A CORESET may be configured with up to three consecutive symbols on the time axis. In addition, a CORESET may be configured in units of six consecutive PRBs on the frequency axis. In the embodiment of FIG. 5 , CORESET#1 is configured with consecutive PRBs, while 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 the embodiment of FIG. 5 , CORESET#1 starts at the first symbol of the time slot, CORESET#2 starts at the fifth symbol of the time slot, and CORESET#9 starts at the ninth symbol of the time slot.

[0077] Figure 7 A method for setting a PUCCH search space in a 3GPP NR system is illustrated.

[0078] 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 referred to as PDCCH candidates) that can be used to send the PDCCH of the UE. The search space may include a common search space that requires UEs of 3GPP NR to search together and a terminal-specific search space or a UE-specific search space that requires a specific UE to search. In the common search space, the UE can monitor the PDCCH that is set 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 a search space position that is different according to the UE. In the case of a UE-specific search space, since the limited control region to which the PDCCH can be allocated, the search space between the UEs can partially overlap and be 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 as (successfully) detecting / receiving the PDCCH, and when the blind decoding fails, it can be expressed as not detecting / not receiving or not successfully detecting / receiving the PDCCH.

[0079] For convenience of explanation, a PDCCH that is scrambled with a group common (GC) RNTI previously known to one or more UEs in order to send DL control information 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 an RNTI of a specific terminal that is already known to a specific UE in order to send UL scheduling information or DL ​​scheduling information to a specific UE is referred to as a PDCCH of a specific UE. A common PDCCH may be included in a common search space, and a UE-specific PDCCH may be included in a common search space or a UE-specific PDCCH.

[0080] The base station may signal each UE or UE group through the PDCCH about information related to resource allocation of the paging channel (PCH) and the downlink shared channel (DL-SCH) as transmission channels (i.e., DL grant) or information related to resource allocation of the uplink shared channel (UL-SCH) and the hybrid automatic repeat request (HARQ) (i.e., UL grant). The base station may send the PCH transport block and the DL-SCH transport block through the PDSCH. The base station may send data excluding specific control information or specific service data through the PDSCH. In addition, the UE may receive data excluding specific control information or specific service data through the PDSCH.

[0081] The base station can include information in the PDCCH about which UE (one or more UEs) the PDSCH data is sent to and how the PDSCH data will be received and decoded by the corresponding UE, and send the PDCCH. For example, assume that the DCI sent on a specific PDCCH is CRC-masked with RNTI "A", and the DCI indicates that the PDSCH is allocated to radio resources "B" (e.g., frequency position) and indicates transmission format information "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 on the PDCCH using the "A" RNTI, the UE receives the PDCCH and receives the PDSCH indicated by "B" and "C" through the information of the received PDCCH.

[0082] Table 2 shows an embodiment of a physical uplink control channel (PUCCH) used in a wireless communication system.

[0083] [Table 2]

[0084] PUCCH format Length of 0FDM symbol Number of bits 0 1-2 ≤2 1 4-14 ≤2 2 1-2 >2 3 4-14 >2 4 4-14 >2

[0085] PUCCH can be used to transmit the following UL control information (UCI).

[0086] - Scheduling Request (SR): information for requesting UL UL-SCH resources.

[0087] -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 (abbreviated as 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.

[0088] - Channel State Information (CSI): Feedback information about the DL channel. The UE generates it based on the CSI-Reference Signal (RS) sent by the base station. Multiple Input Multiple Output (MIMO) related feedback information includes Rank Indicator (RI) and Precoding Matrix Indicator (PMI). The CSI can be divided into CSI Part 1 and CSI Part 2 according to the information indicated by the CSI.

[0089] In the 3GPP NR system, five PUCCH formats can be used to support various service scenarios, various channel environments, and frame structures.

[0090] 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 cyclic shift (CS) sequence from the base sequence for PUCCH format 0. Through this, the UE can obtain frequency diversity gain. Specifically, the UE can receive the PUCCH format 0 signal according to the PUCCH format 0 signal. bit BitUCI(M bit =1 or 2) to determine the cyclic shift (CS) value m cs In addition, the base sequence of length 12 is based on the predetermined CS value m cs The cyclically shifted sequence may be mapped to 1 OFDM symbol and 12 REs of 1 RB and transmitted. 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 with a difference of 6 in cyclic shift value. bit=2, the 2-bit UCI 00, 01, 11 and 10 can be mapped to four cyclic shift sequences in which the difference of the cyclic shift value is 3 respectively.

[0091] PUCCH format 1 can deliver 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 BPSK modulated. The UE can use quadrature phase shift keying (QPSK) to modulate M bit =2 for 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 may be the base sequence for PUCCH format 0. The UE extends the even-numbered OFDM symbols to which PUCCH format 1 is allocated by a 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 to be used. The demodulation reference signal (DMRS) may be extended with the OCC and mapped to the odd-numbered OFDM symbols of PUCCH format 1.

[0092] PUCCH format 2 can deliver more than 2 bits of UCI. PUCCH format 2 can be sent through one or two OFDM symbols on the time axis and one or more RBs on the frequency axis. When PUCCH format 2 is sent in two OFDM symbols, the sequences sent in different RBs through the two OFDM symbols can be the same as 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, for M bit BitUCI(M bit >2) Perform bit-level scrambling, QPSK modulation, and map it to RBs of one or two OFDM symbols. Here, the number of RBs can be one of 1 to 16.

[0093] PUCCH format 3 or PUCCH format 4 can deliver 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 uses -Binary Phase Shift Keying (BPSK) or QPSK for M bit BitUCI(M bit >2) is modulated to generate complex-valued symbols d(0) to d(M symb -1). Here, when π / 2-BPSK is used, M symb =M bit , 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 may 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.

[0094] 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 may transmit is greater than the maximum number of RBs that may 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.

[0095] 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 by RRC signaling. When PUCCH format 1, PUCCH format 3, or PUCCH format 4 is transmitted by N OFDM symbols of the time axis, the first hop may have floor(N / 2) OFDM symbols and the second hop may have ceiling(N / 2) OFDM symbols.

[0096] PUCCH format 1, PUCCH format 3 or PUCCH format 4 can be configured to be repeatedly transmitted in multiple time slots. In this case, the number K of time slots in which PUCCH is repeatedly transmitted can be configured by RRC signal. The repeatedly transmitted PUCCH must start at 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 transmit the PUCCH is indicated as a DL symbol by RRC signal, the UE may not transmit the PUCCH in the corresponding time slot and delay the transmission of the PUCCH to the next time slot to transmit the PUCCH.

[0097] Meanwhile, in the 3GPP NR system, the UE can perform transmission / reception using a bandwidth less than or equal to the bandwidth of the carrier (or cell). To this end, the UE may be configured with a bandwidth portion (BWP) consisting of a continuous bandwidth of a portion of the bandwidth of the carrier. A UE operating according to TDD operation or in an unpaired spectrum can receive up to four DL / UL BWP pairs for one carrier (or cell). In addition, the UE can activate one DL / UL BWP pair. A UE operating according to FDD operation or in a paired spectrum can receive up to 4 DL BWPs on a downlink carrier (or cell) and up to 4 UL BWPs on an uplink carrier (or cell). For each carrier (or cell), the UE can activate one DL BWP and UL BWP. The UE may not receive or send in time-frequency resources other than the activated BWP. The activated BWP may be referred to as an active BWP.

[0098] 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, while the other configured BWPs are deactivated. In a carrier (or cell) operating with TDD, the base station may include a bandwidth part indicator (BPI) indicating the activated BWP in the DCI for scheduling PDSCH or PUSCH 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 activated DL / UL BWP pair based on the BPI. In the case of a downlink carrier (or cell) operating with FDD, the base station may include a BPI indicating the activated BWP in the DCI for scheduling PDSCH to change the DL BWP of the UE. In the case of an uplink carrier (or cell) operating with FDD, the base station may include a BPI indicating the activated BWP in the DCI for scheduling PUSCH to change the UL BWP of the UE.

[0099] Figure 8 is a conceptual diagram illustrating carrier aggregation.

[0100] Carrier aggregation is a method in which a UE uses multiple frequency blocks or cells (in a logical sense) configured with UL resources (or component carriers) and / or DL ​​resources (or component carriers) as one large logical frequency band so that a 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 the convenience of description, the term "component carrier" is used.

[0101] refer to Figure 8 As 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, but this is only an example, and each component carrier may have a different bandwidth. In addition, 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.

[0102] A different center frequency may be used for each component carrier. Alternatively, a common center frequency may be used in physically adjacent component carriers. Figure 8 In the embodiment of the present invention, all component carriers are physically adjacent, then the center frequency A can be used in all component carriers. In addition, assuming that the respective 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.

[0103] When the total 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 total system frequency band and perform communication using all five component carriers. UE B 1 ~B 5 It is possible to perform communication using only a 20 MHz bandwidth and one component carrier. 1 and C 2 The 40 MHz bandwidth and two component carriers may be used to perform communication. The two component carriers may be logically / physically adjacent or non-adjacent. 1 represents the case of using two non-adjacent component carriers, and UE C 2 Indicates the case of using two adjacent component carriers.

[0104] Fig. 9 is a diagram for explaining single 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.

[0105] refer to Fig. 9 (a), in 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 TDD mode, a 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. 9 (b), 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 ULCC 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 may be referred to as a serving DL / UL CC for the specific UE.

[0106] 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 is able to change the CCs to be activated / deactivated and change the number of CCs to be activated / deactivated. If the base station allocates CCs available to the UE as cell-specific or UE-specific, at least one of the allocated CCs will not 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).

[0107] 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 may be configured with DL resources alone, or may be configured with a combination of DL resources and UL resources. When carrier aggregation is supported, the link between the carrier frequency of the DL resources (or DL ​​CC) and the carrier frequency of the UL resources (or UL CC) may 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 the PCell, and the cell corresponding to the SCC is called the 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 UE capabilities, the serving cell may be configured with one PCell and zero or more SCells. In the case of a UE that is in the RRC_CONNECTED state but is not configured for carrier aggregation or does not support carrier aggregation, only one serving cell is configured with only the PCell.

[0108] As described above, the term "cell" used in carrier aggregation is distinguished from the term "cell" referring to a certain 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 representing 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.

[0109] Fig.10 is a 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 is a search area 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 an upper layer.

[0110] exist Fig.10In 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 a PDCCH monitoring CC. When cross-carrier scheduling is not configured by UE-specific (or UE group-specific or cell-specific) higher layer signaling, CIF is disabled, and each DL CC is able to send only the PDCCH for scheduling its PDSCH without CIF according to the NR PDCCH rule (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 use CIF to send not only the PDCCH for scheduling the PDSCH of DL CC A but also the PDCCH for scheduling the 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 according to whether the cross-carrier scheduling is configured for the UE, or monitors the PDCCH including the CIF to receive the PDSCH scheduled by the cross-carrier.

[0111] on the other hand, Fig. 9 and Fig.10 The 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.

[0112] Fig.11 is a block diagram showing the configuration of a UE and a base station according to an embodiment of the present disclosure.

[0113] In an embodiment of the present disclosure, the UE may be implemented using 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 a cell (e.g., a macro cell, a femto cell, a pico cell, etc.) corresponding to a 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).

[0114] 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 .

[0115] First, the processor 110 may execute various instructions or processes within the UE 100 and process data. In addition, the processor 110 may control the overall 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.

[0116] Next, the communication module 120 may be an integrated module that performs wireless communication using a wireless communication network and performs wireless LAN access using a wireless LAN. To this end, the communication module 120 may include a plurality of network interface cards (NICs) such as cellular communication interface cards 121 and 122 and an unlicensed band communication interface card 123 in an internal or external form. In the drawings, the communication module 120 is shown as an integrally integrated module, but unlike the drawings, each network interface card can be independently arranged according to a circuit configuration or usage.

[0117] The cellular communication interface card 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 card 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 card 121 may independently perform cellular communication with at least one of the base station 200, the external device, and the server in accordance with a cellular communication standard or protocol in a frequency band below 6 GHz supported by the corresponding NIC module.

[0118] The cellular communication interface card 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 an embodiment, the cellular communication interface card 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 card 122 may independently perform cellular communication with at least one of the base station 200, the external device, and the server in accordance with a cellular communication standard or protocol in a frequency band greater than 6 GHz supported by the corresponding NIC module.

[0119] The unlicensed band communication interface card 123 transmits or receives a radio signal with at least one of the base station 200, the external device, and the server by using the third frequency band as the unlicensed frequency band, and provides an unlicensed frequency band communication service based on an instruction from the processor 110. The unlicensed band communication interface card 123 may include at least one NIC module using the unlicensed frequency band. For example, the unlicensed frequency band may be 2.4 GHz, 5 GHz, 6 GHz, 7 GHz, or a frequency band higher than 52.6 GHz. At least one NIC module of the unlicensed band communication interface card 123 may independently or dependently perform wireless communication with at least one of the base station 200, the external device, and the server according to the unlicensed frequency band communication standard or protocol of the frequency band supported by the corresponding NIC module.

[0120] 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 to perform wireless communication with at least one of the base station 200, an external device, and a server.

[0121] Next, the user interface 140 includes various input / output means provided in the UE 100. In other words, the user interface 140 can receive user input using various input means, and the processor 110 can control the UE 100 based on the received user input. In addition, the user interface 140 can perform output based on instructions from the processor 110 using various output means.

[0122] 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.

[0123] 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 .

[0124] First, the processor 210 may execute various instructions or programs and process the internal data of the base station 200. In addition, the processor 210 may control the entire operation of each unit in the base station 200 and control the transmission and reception of data 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 time slot configuration notified by the signal.

[0125] Next, the communication module 220 may be an integrated module that performs wireless communication using a wireless communication network and performs wireless LAN access using a wireless LAN. To this end, the communication module 220 may include a plurality of network interface cards such as cellular communication interface cards 221 and 222 and an unlicensed band communication interface card 223 in an internal or external form. In the drawings, the communication module 220 is shown as an integrally integrated module, but unlike the drawings, each network interface card can be independently arranged according to a circuit configuration or usage.

[0126] The cellular communication interface card 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 card 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 card 221 may independently perform cellular communication with at least one of the base station 100, the external device, and the server in accordance with a cellular communication standard or protocol in a frequency band less than 6 GHz supported by the corresponding NIC module.

[0127] The cellular communication interface card 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 card 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 card 222 may independently perform cellular communication with at least one of the base station 100, the external device, and the server in accordance with a cellular communication standard or protocol in a frequency band of 6 GHz or higher supported by the corresponding NIC module.

[0128] The unlicensed band communication interface card 223 transmits or receives a radio signal with at least one of the base station 100, the external device, and the server by using the third frequency band as the unlicensed frequency band, and provides an unlicensed frequency band communication service based on an instruction from the processor 210. The unlicensed band communication interface card 223 may include at least one NIC module using the unlicensed frequency band. For example, the unlicensed frequency band may be 2.4 GHz, 5 GHz, 6 GHz, 7 GHz, or a frequency band higher than 52.6 GHz. At least one NIC module of the unlicensed band communication interface card 223 may perform wireless communication with at least one of the base station 100, the external device, and the server independently or dependently in accordance with the unlicensed frequency band communication standard or protocol of the frequency band supported by the corresponding NIC module.

[0129] Fig.111 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 separately are logically divided elements of the device. Therefore, the aforementioned elements of the device can be installed in a single chip or multiple chips according to the design of the device. 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, the user interface 140, the display unit 150, etc. can be additionally provided in the base station 200 when necessary.

[0130] In a TDD or unpaired spectrum system, the base station may configure a slot format for the UE. The slot format may refer to the type of symbol in the slot. The symbol type may be at least one of a downlink symbol (DL symbol), an uplink symbol (UL symbol), or a flexible symbol. The base station may configure the symbol type of the slot in the radio frame for the UE. A flexible symbol may refer to a symbol that is not configured as a downlink symbol or an uplink symbol.

[0131] The UE may receive information about the type of each symbol in a time slot from a base station via a cell-specific or cell-common radio resource control (RRC) signal. Alternatively, the UE may semi-statically receive information about the type of each symbol in a time slot via SIB1. In addition, the UE may semi-statically receive information about the type of each symbol in a time slot from a base station via a UE-specific UE-dedicated RRC signal. The base station may configure / set the type of each symbol in a time slot for the UE by using the information about the type of each symbol in the time slot.

[0132] When the UE receives information about the type of each symbol in a time slot from a base station via a cell-specific RRC signal, the information about the type of each symbol may include at least one of the following: the period of the cell-specific time slot, the number of time slots including only downlink symbols starting from the cell-specific time slot at the beginning of the period, the number of downlink symbols starting from the first symbol of the time slot immediately after the last time slot including only downlink symbols, the number of time slots including only uplink symbols starting from the last cell-specific time slot of the period, and the number of uplink symbols immediately before the last time slot including only uplink symbols. In addition, when the UE receives information about the type of each symbol in a time slot from a base station via a cell-specific RRC signal, the information about the type of each symbol may include up to two time slot patterns. In this case, each of the two patterns may be continuously applied to symbols in the time domain. Downlink symbols, uplink symbols, and flexible symbols configured based on cell-specific RRC signals or SIB1 may be referred to as cell-specific downlink symbols, cell-specific uplink symbols, and cell-specific flexible symbols, respectively.

[0133] When the UE receives information about the type of each symbol in the time slot from the base station through a UE-specific RRC signal, the cell-specific flexible symbol can be configured as a downlink symbol or an uplink symbol. In this case, the information about the type of each symbol may include at least one of the following: an index for the time slot within the period, the number of downlink symbols starting from the first symbol in the time slot indicated by the index, and the number of uplink symbols starting from the last symbol in the time slot indicated by the index. In addition, for the UE, all symbols in the time slot are configured as downlink symbols, or all symbols in the time slot are configured as uplink symbols. Downlink symbols, uplink symbols, and flexible symbols configured based on UE-specific RRC signals can be referred to as UE-specific downlink symbols, UE-specific uplink symbols, and UE-specific flexible symbols, respectively.

[0134] The base station may send information about the slot format to the UE via a slot format indicator (SFI) in DCI format 2_0 included in the group common (GC)-PDCCH. For the UE receiving the information about the slot format, the GC-PDCCH may be CRC-scrambled using the SFI-RNTI. Hereinafter, the SFI sent via the GC-PDCCH may be described as a dynamic SFI.

[0135] The UE can receive a dynamic SFI via the GC-PDCCH to receive an indication of whether a symbol in a time slot is a cell-specific flexible symbol or a UE-specific flexible symbol, a downlink symbol, an uplink symbol, or a flexible symbol. In other words, only flexible symbols that are semi-statically configured for the UE can be indicated as one of a downlink symbol, an uplink symbol, and a flexible symbol via the dynamic SFI. The UE may not expect that a semi-statically configured downlink symbol or uplink symbol will be indicated as a different type of symbol by the dynamic SFI. The UE can perform blind decoding in each monitoring period configured by the base station to receive a GC-PDCCH that sends a DCI format 2_0 including a dynamic SFI. When the UE successfully receives the GC-PDCCH by performing blind decoding, the UE can apply information about the time slot format indicated by the dynamic SFI starting from the time slot in which the GC-PDCCH has been received.

[0136] The base station can configure a combination of time slot formats that can be indicated by the dynamic SFI for the UE. The time slot format combination can be used for each of 1 to 256 time slots, and the time slot format combination for one of 1 to 256 time slots can be configured for the UE by the dynamic SFI. The dynamic SFI may include an index indicating the time slot to which the time slot format combination is applied. Table 3 shows the time slot format combination for each time slot (see 3GPP TS38.213).

[0137] [Table 3]

[0138]

[0139] In Table 3, D represents a downlink symbol, U represents an uplink symbol, and F represents a flexible symbol. As shown in Table 3, up to two DL / UL switchings may be allowed within one slot.

[0140] In this specification, the terms "configure", "set", and "indicate" may be used interchangeably. That is, the terms "configured", "set", and "indicated" may have the same meaning, and similarly, the terms "configured", "set", and "indicated" may have the same meaning.

[0141] Figures 12 to 18 The diagram illustrates a subband configuration method according to an embodiment of the present disclosure.

[0142] In a TDD or unpaired spectrum system, when a time slot format is configured or indicated for a UE, if limited time domain resources are allocated as uplink resources, problems such as reduced uplink coverage, increased latency, and reduced capacity may occur. In order to solve these problems, specific time domain resources within a cell can be used for both downlink reception and uplink transmission. Even if a base station uses specific time domain resources for both downlink reception and uplink transmission, the UE may only support half-duplex communication and perform only one operation, either downlink reception or uplink transmission, in the same specific time domain resource.

[0143] The specific time domain resources may be cell-specific flexible symbols in a semi-statically configured slot format. This is intended to minimize inter-UE interference due to transmission and reception in different symbol types (DL / UL or UL / DL).

[0144] refer to Fig.12 , the UE can semi-statically receive a cell-specific time slot configuration. The UE can perform downlink reception or uplink transmission on the resources scheduled by the base station. The resources scheduled for PDSCH reception for the first UE and the resources scheduled for PUSCH transmission for the second UE may include the same symbols in the time domain, but may be different RBs in the frequency domain. The method in which a base station schedules multiple UEs to use specific time domain resources for downlink reception and uplink transmission may be inefficient when considering inter-cell interference, spectrum adjustment, and power consumption for PDCCH monitoring for UEs. Hereinafter, a method for addressing this inefficiency will be described. In this specification, subbands can be configured on frequency domain resources within time domain resources (time slots or symbols). In this case, the frequency domain resources may be included in the carrier bandwidth of the UE.

[0145] Spectrum partitioning

[0146] The base station can configure specific time domain resources (cell-specific flexible time slots / symbols) that can be used for both downlink reception and uplink transmission for the UE in the form of multiple subbands in the frequency domain. The multiple subbands can be subbands of the same format or different formats. The subband format may include downlink subbands, uplink subbands, and flexible subbands. The downlink subband may include one or more downlink RBs, the uplink subband may include one or more uplink RBs, and the flexible subband may include one or more flexible RBs, wherein the downlink RB may refer to resources that can be used for downlink reception, and the uplink RB may refer to resources that can be used for uplink transmission. Flexible RBs may refer to resources that can be used for downlink reception and uplink transmission depending on the configuration of the base station.

[0147] (Method 1-1) When multiple subbands are configured for a UE, there can be at most one subband of the same format. That is, a cell-specific flexible time slot / symbol interval can include at most one downlink subband, one uplink subband, and one flexible subband, respectively. Fig.13 , a cell-specific flexible time slot / symbol may include multiple subbands. In such a case, the multiple subbands may include one downlink subband, one uplink subband, and one flexible subband. A guard band may be required to minimize the impact of UL / DL interference between the downlink subband and the uplink subband. Limiting the number of subbands of the same format to one is intended to minimize the number of guard bands while configuring the downlink subband, uplink subband, and flexible subband, thereby increasing the efficiency of frequency resources during downlink reception and uplink transmission.

[0148] (Method 1-2) In addition, when multiple subbands are configured for a UE, multiple subbands of the same format may exist. That is, in a cell-specific flexible time slot / symbol interval, at least one of a downlink subband, an uplink subband, and a flexible subband may be multiple subbands. Fig.14 , the cell-specific flexible time slot / symbol may include multiple subbands. The multiple subbands may include one downlink subband, two uplink subbands and two flexible subbands.

[0149] The multiple subbands in methods 1-1 and 1-2 may include non-overlapping RBs in the frequency domain.

[0150] In methods 1-1 and 1-2, flexible subbands may be configured considering the guard band between the uplink subband and the downlink subband. That is, there may be at least one flexible subband between the uplink subband and the downlink subband. Compared with method 1-2, method 1-1 may require a smaller number of guard bands. Therefore, there may be more resources available for downlink reception and uplink transmission. In addition, compared with method 1-2, when CORESET resources for PDCCH monitoring are configured for UE, method 1-1 may have more frequency resources available, thereby allowing CORESET to be flexibly configured within one downlink subband (or flexible subband). In addition, method 1-1 may also have more frequency domain resources available for uplink transmission than method 1-2. Therefore, compared with method 1-2, method 1-1 may have more advantages in frequency resource utilization efficiency. Hereinafter, the methods described in this specification are based on but not limited to method 1-1. In the present specification, RBs in a downlink subband may be described as downlink RBs, RBs in an uplink subband may be described as uplink RBs, and RBs in a flexible subband may be described as flexible RBs.

[0151] The method of configuring multiple subbands in the frequency domain can be applied to a cell-specific flexible time slot or symbol, and a cell-specific downlink time slot or symbol, or a cell-specific uplink time slot or symbol. Therefore, multiple subbands can be configured in the frequency domain for a UE for a cell-specific downlink time slot or symbol and a cell-specific flexible time slot or symbol. Alternatively, multiple subbands can be configured in the frequency domain for a UE for a cell-specific uplink time slot or symbol and a cell-specific flexible time slot or symbol.

[0152] The method of configuring multiple subbands in the frequency domain may be applied to a UE-specific flexible slot or symbol. In addition, the method of configuring multiple subbands in the frequency domain may be applied to a UE-specific downlink slot or symbol.

[0153] Semi-static subband format configuration

[0154] The subband may be semi-statically configured for the UE through a cell-specific RRC signal or SIB1. The UE may configure the subband by semi-statically receiving subband configuration information from the base station. The subband configuration information may include information related to the location of the subband and information related to the type of the subband (type of RB).

[0155] (Method 2-1) The UE may receive subband configuration information from the base station to configure the number of downlink RBs and the number of uplink RBs. The subband configuration information may include at least one of an index of one of the time slots in the cycle, the number of uplink RBs starting from the first RB in the time slot corresponding to the index, the number of downlink RBs, the number of downlink RBs starting from the last RB in the time slot corresponding to the index, the number of uplink RBs, and information about the positions of downlink subbands and uplink subbands. Among the RBs in the time slot, an RB that is not configured as a downlink RB or an uplink RB may be determined as a flexible RB. Reference Fig.15 , 1) the index for the time slot is n, 2) X RBs starting from the first RB in time slot n are uplink RBs, and 3) Y RBs starting from the last RB in time slot n are downlink RBs. 4) A subband including X RBs starting from the first RB in time slot n may be an uplink subband, and a subband including Y RBs starting from the last RB in time slot n may be a downlink subband. Alternatively, with Fig.15 In contrast, a subband including X RBs starting from the first RB in slot n may be configured as a downlink subband, and a subband including Y RBs starting from the last RB in slot n may be configured as an uplink subband.

[0156] (Method 2-2) The UE may receive subband configuration information from the base station to configure the number and starting RB of flexible RBs. The subband configuration information may include at least one of an index of one of the time slots in the cycle, an index of the first flexible RB among the flexible RBs in the time slot corresponding to the index, the number of flexible RBs in the time slot corresponding to the index, and information about the positions of downlink subbands and uplink subbands. Among the RBs in the time slot, RBs that are not configured as flexible RBs may be determined as downlink RBs and uplink RBs. Reference Fig.16 , 1) the index for the time slot is n, 2) the index of the first flexible RB in time slot n is X, 3) Y RBs starting from X are flexible subbands, and 4) subbands other than the flexible subband in time slot n can be configured as downlink subbands and uplink subbands. That is, the uplink subband may include RBs from the first RB in time slot n to the RB before the first flexible RB of the flexible subband, and the downlink subband may include RBs from the last RB in time slot n to the RB after the last RB of the last flexible subband. In contrast, the downlink subband may include RBs from the first RB in time slot n to the first flexible RB of the flexible subband, and the uplink subband may include RBs from the last RB in time slot n to the last RB of the last flexible subband.

[0157] (Method 2-3) The UE may receive subband configuration information from the base station. Based on the subband configuration information, the UE may configure the uplink (or downlink) starting RB, the number of uplink (or downlink) RBs, and the number of flexible RBs. Specifically, the subband configuration information may include information about one of the following: an index for one of the time slots in the cycle, a starting index of the uplink (or downlink) RB in the time slot corresponding to the index, the number of uplink (or downlink) RBs in the time slot corresponding to the index, and the number of flexible RBs in the time slot corresponding to the index. The UE may determine an RB that is not configured as an uplink (or downlink) RB or a flexible RB as a downlink (or uplink) RB.

[0158] The number of flexible RBs may not be configured by the base station. A predefined number of RBs may not be configured for the guard band, and the flexible subband may be determined by applying the predefined number of RBs to the guard band.

[0159] The flexible subband may be located between the downlink subband and the uplink subband. Therefore, there is an effect that the UE can determine the position of the flexible position even if the start index of the flexible RB is not separately indicated.

[0160] In methods 2-1, 2-2, and 2-3, the subband configuration information may be sent to UEs in a cell in common, wherein the downlink RB, uplink RB, and flexible RB configured for each UE may be configured in units of common resource blocks (CRBs). In addition, in methods 2-1, 2-2, and 2-3, the subband configuration information may be sent to a specific UE in a cell, and the downlink RB, uplink RB, and flexible RB configured for each UE may be configured in units of physical resource blocks (PRBs).

[0161] Methods 2-1, 2-2, and 2-3 have the effect of being able to identify information about all subbands even if the UE partially receives subband configuration information. In methods 2-1 and 2-2, RBs in a semi-static downlink subband may be described as semi-static downlink RBs, RBs in a semi-static uplink subband may be described as semi-static uplink RBs, and RBs in a semi-static flexible subband may be described as semi-static flexible RBs.

[0162] The method for semi-statically configuring subbands based on methods 2-1, 2-2, and 2-3 may include cell-specific flexible time slots or symbols, and may include cell-specific downlink time slots or symbols, and may include cell-specific uplink time slots or symbols. Therefore, the subbands may be semi-statically configured for the UE relative to the cell-specific downlink time slots or symbols and the cell-specific flexible time slots or symbols. Alternatively, the subbands may be semi-statically configured for the UE relative to the cell-specific uplink time slots or symbols and the flexible time slots or symbols. Alternatively, the method for semi-statically configuring subbands based on methods 2-1, 2-2, and 2-3 may include UE-specific flexible time slots or symbols. In addition, the method for semi-statically configuring subbands based on methods 2-1, 2-2, and 2-3 may include UE-specific downlink time slots or symbols.

[0163] The UE may perform the method for semi-statically configuring the subband based on methods 2-1, 2-2, and 2-3 using a cell-specific RRC signal or SIB1 or a UE-specific RRC signal.

[0164] There are multiple indices of one of the time slots in the cycle included in the above subband configuration. That is, the subband can be configured for the UE with respect to multiple time slots in the cycle.

[0165] Dynamic subband format indication

[0166] The subband format can be configured (set / indicated) for the UE through dynamic signaling. That is, the subband format can be configured for the UE from the DCI sent via the PDCCH. When the semi-static format is not configured for the UE, the UE can regard all frequency domain resources in the time slot as semi-static flexible subbands. The subband format can be dynamically indicated to the UE through DCI. That is, the semi-static downlink subband and semi-static uplink subband configured by the semi-static format configuration cannot be indicated as different formats through DCI. When the semi-static subband format is not configured for the UE, the UE can apply the subband format indicated by the DCI to the cell-specific flexible time slot / symbol. The subband format indicated by the DCI can be described as a dynamic subband.

[0167] The subband RB can be indicated to the UE in the frequency domain by the RIV method, which is a method for indicating resources scheduled continuously in the frequency domain in the NR system. RIV can be a value obtained by jointly compiling the starting RB index and the number of continuously allocated RBs. Formula 1 shows a method for determining RIV (see 3GPP TS38.214)

[0168] [Formula 1]

[0169] if but

[0170]

[0171] otherwise

[0172]

[0173] Among them, L RBs >=1 and will not exceed

[0174] Among them, L RBs It can be the number of consecutively allocated RBs. start can be the starting RB index, and It can be the BWP size of the UE. For example, when When it is 4, the expressible starting RB index and the number of consecutively allocated RBs may be as shown in Table 4.

[0175] [Table 4]

[0176]

[0177] In Table 4, S indicates the starting RB index, and L is the number of consecutively allocated RBs. According to Table 4, when When the RIV value is 4, the RIV value can be one of 0 to 9. The UE can determine the starting RB index and the number of consecutively allocated RBs through the indicated RIV value. For example, when the RIV value is 5 indicated to the UE, the UE can identify that two consecutive RBs have been allocated starting from RB#1 in the frequency domain.

[0178] The following describes a method in which a base station indicates a subband format in the frequency domain to a UE in the form of RIV through DCI.

[0179] (Method 3-1) The base station may indicate the number of downlink RBs and the number of uplink RBs as subband configuration information to the UE. The number of downlink and uplink RBs may be indicated to the UE as a jointly coded value. When a value is obtained in the form of RIV, the value may be determined by Formula 2.

[0180] [Formula 2]

[0181] if but

[0182]

[0183] otherwise

[0184]

[0185] in, and Will not exceed

[0186] in, may indicate the number of first RBs allocated consecutively, and The number of consecutively allocated second RBs may be indicated. When the subband format is semi-statically configured for the UE, It can be the size of the flexible subband in the semi-statically configured subband format. When the subband format is not semi-statically configured for the UE, It can be the size of the entire carrier bandwidth. For example, when When is 4, the number of two consecutive allocated RBs may be as shown in Table 5.

[0187] [Table 5]

[0188]

[0189] In Table 5, L1 may be the number of first RBs allocated consecutively, and L2 may be the number of second RBs allocated consecutively. According to Table 5, when When L1 is 4, the RIV value may be any value from 0 to 14. The UE may determine the number of consecutively allocated RBs in the downlink and uplink subbands by the indicated RIV value. That is, the UE may determine L1 as the number of consecutively allocated RBs in the uplink subband, and determine L2 as the number of consecutively allocated RBs in the downlink subband. Conversely, the UE may determine L1 as the number of consecutively allocated RBs in the downlink subband, and determine L2 as the number of consecutively allocated RBs in the uplink subband.

[0190] When the UE determines L1 and L2 as the number of RBs consecutively allocated to an uplink (or downlink) subband and a downlink (or uplink) subband, respectively, the UE may implicitly determine the starting RB index of each subband based on the semi-statically configured subband format. Specifically, when L1 and L2 indicated as semi-static flexible subbands are applied according to method 3-1, the starting RB of the downlink subband may be determined as the RB before or after the semi-statically configured cell-specific downlink subband, and the starting RB of the uplink subband may be determined as the RB after or before the semi-statically configured cell-specific uplink subband. In addition, in the semi-static flexible subband, RBs that are not determined as dynamic downlink subbands and dynamic uplink subbands may be determined as dynamic flexible subbands. Reference Fig.17, it can be indicated to the UE that, for a semi-static flexible subband, L1 represents the number of RBs continuously allocated to a dynamic uplink subband, and L2 represents the number of RBs continuously allocated to a dynamic downlink subband. In addition, in the semi-static subband configuration, the semi-static uplink subband may include RBs from the first RB in slot n to the RB before the first dynamic subband RB (dynamic uplink (or downlink) subband RB), and the semi-static downlink subband may include RBs from the last RB in slot n to the RB after the dynamic subband RB (dynamic uplink (or downlink) subband RB). Therefore, the UE can determine that the L1 RB starting from the RB after the semi-statically configured uplink subband is a dynamic uplink subband, and the L2 RB starting from the RB before the semi-static downlink subband is a dynamic downlink subband. The UE can determine the RBs in the semi-static flexible subband that are not dynamically indicated as downlink subbands or uplink subbands as dynamic flexible subbands.

[0191] (Method 3-2) The index of the starting RB of the flexible subband and the number of RBs may be indicated to the UE as subband configuration information. The index of the starting RB of the flexible subband and the number of RBs as a joint coding value may be indicated to the UE. When a value is determined in the form of RIV, a value may be obtained by Formula 1. In this case, the value is used in Formula 1. replace and The same as defined in Formula 2. In addition, the RBs that are not determined as dynamic flexible subbands may be determined as dynamic downlink subbands and dynamic uplink subbands. In this case, the dynamic downlink subbands and dynamic uplink subbands may include RBs that are continuous with the semi-static downlink subbands and the semi-static uplink subbands that are semi-statically configured in the frequency domain. Fig.18 , the dynamic flexible subband may be positioned within the semi-static flexible subband. S may be the starting RB index of the dynamic flexible subband, and L may be the number of RBs continuously allocated to the dynamic flexible subband. The UE may determine the dynamic flexible subband based on the index of the starting RB configured for the semi-static flexible subband and the number of continuous RBs. The UE may determine the RBs of the semi-static flexible subband that are not configured as the dynamic flexible subband as the RBs of the dynamic downlink subband and the dynamic uplink subband. The UE may determine the RBs that are continuous with the semi-static downlink subband among the RBs that are not configured for the configuration of the dynamic flexible subband as the RBs of the dynamic downlink subband. The UE may determine the RBs that are continuous with the semi-static uplink subband among the RBs that are not indicated as the dynamic flexible subband as the RBs of the dynamic uplink subband.

[0192] The unit of RB in methods 3-1 and 3-2 may be PRB.

[0193] (Method 3-3) The base station may indicate to the UE the index of the starting RB in the uplink (or downlink) subband and the number of RBs. The base station may indicate to the UE a value of the index of the starting RB for joint coding and the number of RBs. In this case, a value of joint coding may be obtained by the above formula 1. The UE may determine whether an RB that is not indicated as an uplink (or downlink) RB is a downlink (or uplink) RB or a flexible RB. In addition, the number of flexible RBs may be the number of flexible RBs semi-statically configured or determined by the UE. The UE may determine an RB that is not an uplink (or downlink) RB or a flexible RB as a downlink (or uplink) RB.

[0194] The flexible subband may be located between the downlink subband and the uplink subband. Therefore, even if the start index of the flexible RB is not separately indicated, the UE may identify the location of the flexible subband without ambiguity.

[0195] In methods 3-1, 3-2, and 3-3, the dynamic downlink subband, the dynamic uplink subband, and the dynamic flexible subband may include consecutive RBs in the frequency domain.

[0196] In methods 3-1, 3-2, and 3-3, subband configuration information may be commonly transmitted to UEs in a cell, wherein downlink RBs, uplink RBs, and flexible RBs configured for each UE may be configured in units of common resource blocks (CRBs).

[0197] When a dynamic subband format is indicated to a UE according to methods 3-1, 3-2, or 3-3, information about the subband format may be sent to the UE via group common signaling. For example, dynamic subband format information may be included in DCI format 2_0 used in legacy NR. DCI format 2_0 may be sent via GC-PDCCH, and for UEs receiving subband format information, GC-PDCCH may be CRC-scrambled using SFI-RNTI. The UE may perform blind decoding in each monitoring period configured by the base station to receive a GC-PDCCH including DCI format 2_0, which includes subband format information. When the UE successfully receives the GC-PDCCH by performing blind decoding, the UE may apply the subband format information during the monitoring period configured by the base station starting from the time slot in which the PDCCH has been received. In addition, dynamic subband format information may be sent via a new DCI format (e.g., DCI format 2_x) instead of the DCI format used in legacy NR. DCI format 2_x can be sent through GC-PDCCH, and GC-PDCCH can send a time slot formation indication (SFI-F) in the frequency domain to notify the UE receiving the subband format information of the time slot format in the frequency domain. SFI-F can be CRC-encrypted using SFIF-RNTI. In order to receive a PDCCH including DCI format 2_x, blind decoding can be performed in each monitoring period configured by the base station. When the UE successfully receives the GC-PDCCH by performing blind decoding, the UE can apply the subband format information during the monitoring period configured by the base station starting from the time slot in which the GC-PDCCH has been received.

[0198] When a dynamic subband format is configured for a UE according to method 3-1, the payload size of DCI format 2_0 or DCI format 2_x including dynamic subband format information can be When a dynamic subband format is configured for a UE according to method 3-2, the payload size of DCI format 2_0 or DCI format 2_x including dynamic subband format information can be When a dynamic subband format is configured for a UE according to method 3-3, the payload size of DCI format 2_0 or DCI format 2_x including dynamic subband format information can be bits.

[0199] RBs in a dynamic downlink subband determined according to method 3-1, 3-2 or 3-3 may be described as dynamic downlink RBs, RBs in a dynamic uplink subband may be described as dynamic uplink RBs, and RBs in a dynamic flexible subband may be described as dynamic flexible RBs.

[0200] The method for dynamically indicating a subband based on method 3-1, 3-2 or 3-3 may be applied to a cell-specific flexible time slot or symbol, and may be applied to a cell-specific downlink time slot or symbol or an uplink time slot or symbol. Therefore, for a cell-specific downlink time slot or symbol and a cell-specific flexible time slot or symbol, a subband may be dynamically indicated to the UE. In addition, for a cell-specific uplink time slot or symbol, a subband may be dynamically indicated to the UE.

[0201] The method for dynamically configuring a subband for a UE based on method 3-1, 3-2 or 3-3 may be applied to a UE-specific flexible slot or symbol. In addition, the method for dynamically configuring a UE subband based on method 3-1, 3-2 or 3-3 may be applied to a UE-specific downlink slot or symbol.

[0202] Uplink transmission

[0203] A method for UE to transmit a physical uplink shared channel (PUSCH) will be described. The UE can transmit uplink data (e.g., UL-SCH TB) to the base station through the PUSCH. At this time, the UE can transmit uplink data by using a method of scheduling a PUSCH obtained from the DCI in the PDCCH (DG, dynamic grant) or a method of transmitting the PUSCH according to a transmission method and resources (CG, configuration grant) preconfigured by the base station.

[0204] The UE may include PUSCH scheduling information by decoding the DCI identified by the PDCCH. The PUSCH scheduling information may include time domain information (hereinafter referred to as time domain resource allocation, TDRA) and frequency domain information (hereinafter referred to as frequency domain resource assignment, FDRA). The UE may interpret the DCI sent via the PDCCH based on the information about the control resource set (CORESET) and the search space, and perform the operation indicated in the DCI. The DCI format for scheduling PUSCH may be one of DCI formats 0_0, 0_1, or 0_2.

[0205] The time domain information of the PUSCH indicated by the TDRA field in DCI format 0_0, 0_1 or 0_2 includes the following:

[0206] - K2: an offset value between (i) a time slot in which the UE receives a PDCCH from the base station and (ii) a time slot in which the UE transmits a PUSCH to the base station.

[0207] - Start and Length Indicator Value (SLIV): The jointly coded value of the starting symbol index (S) of the PUSCH and the symbol length (L) of the PUSCH in the time slot indicated by the K2 value. The UE may be configured with K2 and SLIV by the base station. Alternatively, the base station may configure the UE with K2, S, and L.

[0208] When the UE receives a DCI (e.g., DCI format 0_0, 0_1, or 0_2) for scheduling a PUSCH in time slot n, the time slot floor (n*2 μPUSCH / n*2 μPDCCH )+K2 is determined as the time slot in which the PUSCH is transmitted. Here, μPUSCH and μPDCCH respectively represent the SCS of the cell (or BWP) in which the PUSCH is scheduled and the SCS of the cell (or BWP) in which the PDCCH is received.

[0209] PUSCH may be configured as PUSCH mapping type A or PUSCH mapping type B. When the UE is configured to use PUSCH mapping type A, the UE may only receive PUSCH resource allocations including DMRS symbols, and the DMRS symbols are located in the third or fourth symbol of the time slot indicated by the K2 value according to the value configured by the base station. That is, when the UE is configured to use PUSCH mapping type A, the starting symbol index (S) of the PUSCH may be configured / indicated as 0, the symbol length (L) of the PUSCH may be configured / indicated as one of the values ​​of 4 to 14 (12 in the case of extended CP), or the SLIV may be configured / indicated as one of the values ​​of 4 to 14 (12 in the case of extended CP). When the UE is configured to use PUSCH mapping type B, the first symbol of the PUSCH may be at least a DMRS symbol, the starting symbol index of the PUSCH may be configured as one of the values ​​of 0 to 13 (11 for extended CP), and the symbol length of the PUSCH may be configured as one of the values ​​of 1 to 14 (12 for extended CP). Alternatively, when the UE is configured to use PUSCH mapping type B and PUSCH repetition type A, SLIV may be configured to one of the values ​​from 1 to 14 (12 for extended CP). When the UE is configured to use PUSCH mapping type B and PUSCH repetition type B, SLIV may be configured to one of the values ​​from 1 to 27 (23 for extended CP).

[0210] The frequency domain information of the PUSCH indicated by the FDRA field in DCI formats 0_0, 0_1, and 0_2 can be classified into two types according to the uplink resource allocation type.

[0211] In the case of uplink resource allocation type 0, a fixed number of PRBs are grouped into resource block groups (RBGs) according to the number of PRBs included in the BWP configured for the UE, and the UE is indicated using the RBG unit bitmap and thereby determines whether to use the corresponding RBG. The number of PRBs included in one RBG can be configured by the base station. The more PRBs included in the BWP configured for the UE, the more PRBs that can be configured to be included in one RBG. When the bit value indicated in the bitmap is 0, the UE determines / interprets that the PUSCH is not scheduled for any of the PRBs in the corresponding RBG, and when the bit value is 1, it is determined / interpreted that the PUSCH is scheduled for all PRBs in the corresponding RBG. Alternatively, the bit value can be applied in reverse according to the implementation method.

[0212] In the case of uplink resource allocation type 1, the resource allocation information may indicate information of consecutive PRBs allocated for uplink transmission. The resource allocation information includes a resource indication value (RIV) obtained by jointly compiling the starting index and length of consecutive PRBs in the frequency domain. The RIV may be defined to indicate the starting index and length of consecutive PRBs based on the size of the initial BWP or active BWP of the UE.

[0213] Limited to DCI format 0_1 ​​or 0_2, the UE can be configured by the base station to use only one of the two uplink resource allocation types, or to use both types dynamically. When the UE is configured to dynamically use two uplink resource allocation types, the UE can determine the uplink resource allocation type to be used for PUSCH transmission via 1 bit of the most significant bit (MSB) of the FDRA field in DCI format 0_1 ​​or 0_2.

[0214] The NR system supports a configuration grant (CG)-based PUSCH (hereinafter referred to as CG-PUSCH) transmission scheme to support uplink URLLC transmission, etc. The CG-PUSCH transmission scheme is also called an unlicensed transmission scheme. The CG-PUSCH transmission scheme is a scheme in which the UE receives resources available for PUSCH transmission from the base station in advance via an upper layer (e.g., RRC) signal and sends PUSCH via the corresponding resources. Depending on whether activation or release via DCI is possible, the CG-PUSCH transmission scheme can be classified into the following two types.

[0215] -Type 1 PUSCH transmission with configuration permission: The base station can configure the UE with a period for PUSCH transmission via a higher layer (e.g., RRC) signal, and can indicate the time / frequency resources and transmission scheme via DCI (PDCCH). The transmission scheme may include modulation and coding scheme (MCS), TB size (TBS), etc.

[0216] - Type 2 PUSCH transmission with configuration grant: The base station may configure the UE with a period for PUSCH transmission via a higher layer (eg, RRC) signal, and may indicate time / frequency resources and a transmission scheme via DCI (PDCCH).

[0217] The CG-PUSCH transmission scheme can support repeated transmission of PUSCH through multiple time slots to ensure reliable uplink transmission. At this time, the UE and the base station define the time point that can be assumed to start the CG-PUSCH transmission as follows. The UE is configured to use one of the redundant version (RV) sequences {0,2,3,1}, {0,3,0,3} or {0,0,0,0} for CG-PUSCH repeated transmission, and use the RV value corresponding to the {mod(n-1,4)+1}th value in the nth initial transmission occasion (TO). Here, n is an integer greater than 0. At this time, the UE can determine the initial TO at which repeated transmission can be started based on the configured RV sequence as follows.

[0218] – In the case where the RV sequence is configured as {0, 2, 3, 1}: The first TO corresponding to RV = 0 may be determined as the initial TO. The UE may start CG-PUSCH repetition transmission from the TO corresponding to the first RV = 0, and the base station assumes that repetition transmission from the UE may start and attempts to receive the CG-PUSCH repetition transmission.

[0219] – In the case where the RV sequence is configured as {0,3,0,3}: TO corresponding to RV = 0 may be determined as the initial TO. The UE may start CG-PUSCH repetition transmission from TO corresponding to RV = 0, and the base station assumes that repetition transmission from the UE may start and attempts to receive the CG-PUSCH repetition transmission.

[0220] – In the case where the RV sequence is set to {0,0,0,0}: All TOs corresponding to RV=0 except the last TO can be determined as the initial TO. The UE can start CG-PUSCH repetition transmission from all TOs corresponding to all RV=0 except the last TO, and the base station assumes that the UE can start repetition transmission from the UE and attempts to receive the CG-PUSCH repetition transmission.

[0221] In a wireless communication system, in order to enhance the reliability of PUSCH transmission and reception between a base station and a UE, the base station may configure the UE to perform PUSCH repetition transmission. The PUSCH repetition transmission that the UE may perform may be classified into two types.

[0222] First, the transmission process of the UE's PUSCH repetition transmission type A is as follows. When the UE receives DCI formats 0_1 to 0_2 for scheduling PUSCH from the base station via PDCCH, PUSCH repetition transmission is possible in K consecutive time slots. Here, the value of K can be configured by a higher layer (e.g., RRC), or can be indicated by the value of the TDRA field of the DCI. In this case, the time / frequency resources for sending PUSCH in each time slot are the same as the time / frequency resources indicated in the DCI. That is, PUSCH can be repeatedly transmitted in the same symbol and PRB within each time slot.

[0223] Next, the transmission process of PUSCH repetition transmission type B that supports low-latency PUSCH repetition transmission to meet requirements such as URLLC is as follows. The base station can indicate the starting symbol (S) of the UE PUSCH and the length (L) of the PUSCH via the TDRA field. Here, the PUSCH with the starting symbol and the length indicated by the TDRA field is not the PUSCH actually sent, but a temporarily obtained PUSCH, called the nominal PUSCH. In addition, the nominal number of repetitions (N) of the UE nominal PUSCH can be indicated via the TDRA field. Therefore, the UE can determine N nominal PUSCHs via the TDRA field. The length of the N nominal PUSCHs is the same, which is L, and the nominal PUSCH is continuous on the time axis without separate symbols in between.

[0224] The UE can determine the actual PUSCH from the nominal PUSCH. One nominal PUSCH can be determined as one or more actual PUSCHs. The UE can be instructed / configured by the base station on symbols that are not available in PUSCH repetition transmission type B. These are called invalid symbols. Invalid symbols may include symbols configured as DL symbols via TDD configuration, symbols configured for receiving SS / PBCH blocks, symbols configured for receiving CORESET associated with type 0-PDCCH CSS, and symbols configured for DL ​​to UL switching. The UE can exclude invalid symbols from the nominal PUSCH. As mentioned above, the nominal PUSCH is determined as continuous symbols, but when invalid symbols are excluded, it can be determined as discontinuous symbols. The actual PUSCH can be determined as continuous symbols in a nominal PUSCH, from which invalid symbols are excluded. Here, when continuous symbols cross time slot boundaries, the actual PUSCH can be divided based on the time slot boundaries.

[0225] A method in which a UE transmits a physical uplink control channel (PUCCH) will be described.

[0226] When the UE receives a DCI format (e.g., DCI format 1_0, 1_1, or 1_2) for scheduling PUCCH, the UE should send the scheduled PUCCH. PUCCH may include UCI, and UCI may include HARQ-ACK, SR and / or CSI information. The HARQ-ACK information may be HARQ-ACK information about whether two types of channel reception are successful. For the first type, when PDSCH is scheduled via DCI format 1_0, 1_1, or 1_2, the HARQ-ACK information may be HARQ-ACK about whether PDSCH reception is successful. For the second type, when DCI format 1_0, 1_1, or 1_2 indicates the release of a semi-static physical downlink shared channel (SPS PDSCH) (hereinafter referred to as DL SPS release), the HARQ-ACK information may be HARQ-ACK about whether the reception of DCI format 1_0, 1_1, or 1_2 (or DL ​​SPS release) is successful.

[0227] In order to send a PUCCH for carrying HARQ-ACK, the PDSCH-to-HARQ_feedback timing indicator field included in DCI format 1_0, 1_1, or 1_2 may indicate a slot offset K1 for a slot in which the scheduled PUCCH should be sent. Here, the K1 value may be a non-negative integer value. The K1 value of DCI format 1_0 may indicate one of the values ​​{0, 1, 2, 3, 4, 5, 6, 7}. The K1 value that may be indicated in DCI format 1_1 or 1_2 may be configured by a higher layer (e.g., RRC).

[0228] The UE may determine the time slot for sending a PUCCH including the first type of HARQ-ACK information as follows. The UE may determine an uplink time slot that overlaps with the last symbol of the PDSCH corresponding to the HARQ-ACK information. When the index of the uplink time slot is m, the uplink time slot used by the UE to send the PUCCH including the HARQ-ACK information may be m+K1. Here, the index of the uplink time slot is the value of the subcarrier spacing according to the (uplink) BWP in which the PUCCH is sent. When the UE is configured for downlink time slot aggregation, the end symbol indicates the last symbol of the PDSCH scheduled in the last time slot in the time slot in which the PDSCH is received.

[0229] In the NR system, in order to ensure wide coverage, the UE can be configured to repeatedly send long PUCCH (PUCCH formats 1, 3, 4) in 2, 4 or 8 time slots. When the UE is configured to repeatedly send PUCCH, the same UCI can be repeatedly sent in each time slot. The symbol configuration of the repeatedly sent PUCCH is the same. That is, the repeatedly sent PUCCH starts from the same symbol in each time slot and includes the same number of symbols.

[0230] When the UE performs PUCCH repetition transmission and a symbol in which the PUCCH should be transmitted in a specific time slot overlaps with an invalid symbol (for example, a DL symbol semi-statically configured via TDD configuration or a symbol configured for receiving an SS / PBCH block), the UE may postpone the PUCCH transmission to the next time slot instead of transmitting the PUCCH in the corresponding time slot. Subsequently, when a symbol in which the PUCCH should be transmitted in the time slot in which the PUCCH transmission is postponed does not overlap with an invalid symbol, the UE may transmit the PUCCH in the corresponding time slot.

[0231] Frequency hopping of uplink channels

[0232] When the UE transmits a UL channel (e.g., PUSCH or PUCCH), the UE may use a frequency hopping scheme to obtain a frequency diversity gain. Here, the frequency hopping scheme refers to transmitting the UL channel in PRB set #0 and transmitting the UL channel in PRB set #1. PRB set #0 and PRB set #1 are different. For convenience, in the following description, the UL channel transmitted in PRB set #0 will be referred to as hopping 0, and the UL channel transmitted in PRB set #1 will be referred to as hopping 1. Although the following description provides that up to two hops (e.g., hop 0 and hop 1) are described, the number of hops may be further increased.

[0233] ]When the UE sends PUSCH or PUCCH, the method of determining the PRB set of hop 0 (i.e., PBB set #0) and the PRB set of hop 1 (i.e., PBB set #1) is as follows.

[0234] First, frequency hopping during PUCCH transmission will be described.

[0235] Before RRC connection, in the case of PUCCH, the PRB set for frequency hopping can be determined as follows. For reference, the PUCCH before RRC connection includes a PUCCH that transmits HARQ-ACK, which is a reception success response of a PDSCH including message 4 (Msg4) in a random access channel (RACH) process (hereinafter, referred to as Msg4 PDSCH).

[0236] Before RRC connection (ie, before establishing UE-dedicated PUCCH resources), the UE obtains 4 bits of information from system information (eg, Remaining System Information (RMSI)), and the 4 bits of information are used to configure / identify a cell-common PUCCH resource set.

[0237] Table 6 shows a PUCCH resource set common to multiple cells. The index corresponds to a PUCCH resource set common to one cell and is indicated by 4 bits of information in the system information.

[0238] [Table 6]

[0239]

[0240] Thereafter, the UE may select / determine a PUCCH resource from the PUCCH resource set common to the cell indicated by the system information. PUCCH A PUCCH resource may be selected / determined based on a PUCCH resource indicator (PRI) included in a DCI format (e.g., DCI format 1_0, 1_1, or 1_2) that schedules the PUCCH and an index (e.g., a minimum CCE index) of a CCE in which the DCI format is received. PUCCH .

[0241] [Formula 3]

[0242]

[0243] Here, N CCE represents the number of CCEs in the CORESET in which the DCI format is received, n CCE,0 represents the index of the first CCE among the CCEs in which the DCI format is received, and PRI Indicates the PRI value in the DCI format.

[0244] By combining the common PUCCH resource set of the cell and r PUCCH , the RB set used for PUCCH transmission, frequency hopping direction, initial cyclic shift (CS), etc. can be determined. The cell-common PUCCH resource set only supports PUCCH formats 0 and 1. In the case of PUCCH formats 0 and 1, the PRB set used for PUCCH transmission consists of one PRB.

[0245] r PUCCH has one of the values ​​0, 1, ..., 15. Therefore, the UE can use the same PUCCH resource among the 16 PUCCH resources as r PUCCH The corresponding PUCCH resources perform PUCCH transmission.

[0246] For example, when r PUCCHWhen it is one of 0, 1, ..., 7, the PRB index of the PUCCH resource hopping 0 is The PRB index for hop 1 is When PUCCH When it is one of 8, 9, ..., 15, the PRB index of the PUCCH resource hopping 0 is And the PRB index of hop 1 is

[0247] Here, N size BWP is the number of PRBs included in the active BWP for sending PUCCH. When PUCCH sends HARQ-ACK for Msg4PDSCH, the active BWP is the initial UL BWP. The initial UL BWP is the UL BWP used by the UE to perform cell access and is configured in SIB1. N CS Indicates the number of initial CS indexes. RB offset BWP and the number of initial CS indexes are shown in Table 6.

[0248] When the index of the PRB of hop 0 is 0, the PRB indicates the lowest PRB of the active BWP of the UE. That is, the PRB index of hop 0 is interpreted as the index of the active BWP. When the PUCCH sends the HARQ-ACK of Msg4 PDSCH, the active BWP is replaced by the initial UL BWP. That is, the PRB index of hop 0 is interpreted as the index of the initial UL BWP.

[0249] After RRC connection, in case of PUCCH, a PRB set for frequency hopping may be determined as follows.

[0250] The index of the lowest PRB of the PRB set of hopping 0 (ie, PRB set #0) and the index of the lowest PRB of the PRB set of hopping 1 (ie, PRB set #1) of the PUCCH may be configured as PUCCH resources for the UE via the RRC signal. That is, when the UE is indicated to have one PUCCH resource (PRI in DCI), the UE may send hopping 0 and hopping 1 by using the index of the lowest PRB of the PRB set of hopping 0 and the index of the lowest PRB of the PRB set of hopping 1 configured in the PUCCH resource. When the index of the PRB is 0, the PRB indicates the lowest PRB of the active BWP of the UE. That is, the index of the PRB may be interpreted as the index of the active BWP of the UE.

[0251] Next, frequency hopping during PUSCH transmission will be described. In the case of PUSCH, the PRB set for frequency hopping can be determined as follows. The UE can determine the PRB set of hopping 0 (i.e., PBB set #0) via the DCI for scheduling PUSCH or the DCI / RRC signal for activating PUSCH. Here, the DCI for scheduling PUSCH or the DCI / RRC signal for activating PUSCH may include the FDRA field. The FDRA field may include (i) the RB index starting with the PRB set of hopping 0 and (ii) the number of consecutive RBs. Here, when the RB index starting with the PRB set of hopping 0 is 0, the RB represents the lowest PRB of the UE's active BWP. That is, the RB index starting with the PRB set of hopping 0 can be interpreted as the index of the UE's active BWP. For frequency hopping, the UE should determine the RB index starting with the PRB set of hopping 1 (i.e., PBB set #1). This can be determined using the following formula.

[0252] [Formula 4]

[0253]

[0254] Here, RB start (0) indicates the RB index of the PRB set starting with hop 0, and RB start (1) indicates the RB index of the starting PRB set of hop 1. offset Indicates the PRB interval between the PRB set of hopping 0 and the PRB set of hopping 1. The base station can configure / instruct the UE RB offset , and RB offset The value can be 0, 1, ..., N size BWP-1 One of the. size BWP represents the number of PRBs included in the active BWP of the UE. When the RB index of the PRB set starting with hop 1 obtained by the above formula is 0, the RB represents the lowest PRB of the active BWP of the UE. That is, the index of the RB starting with the PRB set of hop 1 (RB start (1)) can be interpreted as the index of the active BWP of the UE.

[0255] Table 7 shows the PRB offset RB for hopping 1 when PUSCH transmits Msg3 (hereinafter, Msg3PUSCH) in the RACH procedure. offset Here, N size BWP is the number of RBs included in the initial UL BWP. According to Table 7, when the number of RBs included in the initial UL BWP is less than 50, RB offset Can be a value and and when the number of RBs included in the initial UL BWP is greater than or equal to 50, RB offset Can be a value and one.

[0256] [Table 7]

[0257]

[0258] For Msg3 PUSCH initial transmission, whether frequency hopping can be indicated by a 1-bit frequency hopping flag (FH flag) in the UL grant of the random access response (RAR) of the scheduling Msg3 PUSCH. For Msg3 PUSCH retransmission, whether frequency hopping can be indicated by a 1-bit FH flag in the DCI format 0_0 scrambled with TC-RNTI of the scheduling Msg3 PUSCH. When the value of the FH flag is 0, the UE sends the Msg3 PUSCH without frequency hopping, and when the value of the FH flag is 1, the UE sends the Msg3 PUSCH via frequency hopping.

[0259] In this specification, the transition 0 described above may be interchangeably referred to as a first transition, and the transition 1 may be interchangeably referred to as a second transition.

[0260] When the UE is configured / instructed to transmit the PUSCH or PUCCH by using a frequency hopping scheme, one of the following frequency hopping methods may be configured / instructed.

[0261] - Frequency hopping within a time slot:

[0262] In case of PUSCH transmission, the UE may split the PUSCH into two halves in the time domain within the time slot indicating the PUSCH transmission, map the two halves to two hops respectively, and transmit accordingly. Here, the PUSCH transmission may or may not be a repeated PUSCH transmission. When the length of the symbol allocated to the PUSCH in a time slot is N PUSCH,s symb When the floor(N PUSCH,s symb / 2) symbols are mapped to PUSCH, and in the second hop {N PUSCH ,s symb -floor(N PUSCH,s symb / 2)} symbols are mapped to PUSCH. Here, floor() refers to a floor function.

[0263] In the case of PUCCH transmission, the UE may split the PUCCH into two halves in the time domain within the time slot indicating the PUSCH transmission, and map the two halves to two hops respectively, and transmit accordingly. Here, the PUCCH transmission may or may not be a PUCCH repeated transmission. When the length of the symbol allocated to the PUCCH in a time slot is the number of symbols, floor(number of symbols / 2) symbols may be mapped to the PUCCH in the first hop, and the number of symbols -floor(number of symbols / 2) symbols may be mapped to the PUCCH in the second hop.

[0264] -Inter-slot frequency hopping:

[0265] In the case of repeated PUSCH transmission, the UE may map the PUSCH transmission to the first hop or the second hop based on the absolute slot index within the radio frame of the slot including the repeated PUSCH transmission. Here, when the index within the radio frame of the slot including the repeated PUSCH transmission is an even number, the PUSCH transmission may be mapped to the first hop, and when the index within the radio frame of the slot including the repeated PUSCH transmission is an odd number, the PUSCH transmission may be mapped to the second hop.

[0266] In the case of PUCCH repetition transmission, the UE may sequentially assign transmission slot indices based on the first slot indicating PUCCH repetition transmission (for the repetition slot index). The UE may determine the repetition transmission slot index of the first slot indicating PUCCH repetition transmission to be 0. For subsequent slots, the UE may sequentially assign repetition transmission slot indices regardless of whether PUCCH is transmitted in the corresponding slot. The UE may send PUCCH in the first hop in the slot corresponding to the even-numbered repetition transmission slot index, and send PUCCH in the second hop in the slot corresponding to the odd-numbered repetition transmission slot index.

[0267] Example: UL frequency hopping to support sub-band non-overlapping full-duplex (SBFD) operation

[0268] The present disclosure relates to a case where a UE is semi-statically configured or dynamically indicated for a subband format and the UE transmits an uplink channel (eg, PUSCH or PUCCH) by frequency hopping.

[0269] For example, the UE may be configured or instructed to use the uplink subband for flexible slots / symbols or downlink slots / symbols. In addition, the UE may be configured or instructed to send PUSCH or PUCCH by frequency hopping in the slots / symbols in which the uplink subband is configured or indicated.

[0270] First, the terms used in this disclosure will be organized.

[0271] - Subband Non-Overlapping Full Duplex (SBFD): refers to a method of using subbands within a cell / BWP to support simultaneous transmit and receive operations. Here, subband refers to a frequency band configured / indicated for SBFD operation within a cell / BWP. A subband can consist of a set of contiguous (P)RBs. Examples of subband configurations / formats can be found at Figures 12 to 18 . For example, in the case of an unpaired spectrum (i.e., a TDD cell / BWP), the UL subband may be configured on a DL slot / symbol, or the UL subband may be configured on a flexible slot / symbol. Alternatively, in the case of an unpaired spectrum, the DL subband may be configured on a UL slot / symbol, or the DL subband may be configured on a flexible slot / symbol. In addition, in the case of a paired spectrum (i.e., an FDD cell / BWP), the UL subband may be configured on a DL BWP, or the DL subband may be configured on a UL BWP. When SBFD operation is configured for a cell / BWP, the cell / BWP may include TDMed SBFD intervals and non-SBFD intervals in the time domain.

[0272] -SBFD interval: refers to a time interval in which a subband is configured / indicated on a cell / BWP. For example, the SBFD interval includes a time interval in which an uplink subband is configured / indicated. For example, the SBFD interval includes a time slot in which an uplink subband is configured / indicated. For example, the SBFD interval includes a symbol (or symbol set) in which an uplink subband is configured / indicated. The SBFD interval includes a SBFD time slot and / or a SBFD symbol. The SBFD interval may include one or more subbands in the frequency domain. When multiple subbands are configured in the SBFD interval, the subbands are FDMed. Multiple subbands (DL subbands or UL subbands) in the SBFD interval may be configured to avoid overlapping each other in the frequency domain.

[0273] - Non-SBFD interval: refers to a time interval in which a subband is not configured / indicated on a cell / BWP. A non-SBFD interval includes a non-SBFD time slot and / or a non-SBFD symbol. A non-SBFD interval refers to a legacy interval or a normal interval. According to the time slot format, a non-SBFD interval includes at least one of a DL symbol, a flexible symbol, and a UL symbol. For example, when SBFD operation is configured / indicated for a UL BWP, the non-SBFD interval includes a UL time slot / symbol.

[0274] - Determining (frequency) hopping: refers to determining resources (eg, PRBs) corresponding to frequency hopping.

[0275] - Legacy NR system: refers to a system that operates in the legacy NR mode because SBFD operation is not supported or configured.

[0276] For convenience, the following exemplifies a case where SBFD operation is configured in a UL BWP. However, the present disclosure can be equally applied even when SBFD operation is configured in a TDD cell / BWP.

[0277] 1) PUSCH situation

[0278] When the UE is configured or instructed to transmit the PUSCH via frequency hopping in a slot / symbol in which an uplink subband is configured, the UE may determine the first hopping and the second hopping in the frequency domain by using the above-described method.

[0279] According to the existing method, the value of determining the first hopping or the second hopping configured or indicated by the base station to the UE can be equally applied not only to the time slot / symbol of the configured subband, but also to other time slots / symbols. That is, the value configured or indicated for frequency hopping is equally applied to all time slots / symbols, regardless of the time slot / symbol type. For example, the offset value RB configured by the base station for the UE to determine the second frequency hopping is offset It can be equally applied not only to the time slots / symbols of the configured subbands, but also to other time slots / symbols. In other words, the offset value for frequency hopping configured by the base station for the UE can be equally applied to the time slots / symbols of the configured subbands and the time slots / symbols of the unconfigured subbands. In addition, the number N of PRBs constituting the ULBWP is size BWP It may be equally applied to the slots / symbols of the configured subbands and the slots / symbols of the unconfigured subbands. In this case, the second hop may include PRBs outside the uplink subband, and when the PRB is a downlink PRB, the PUSCH may not be transmitted in the second hop.

[0280] For example, refer to Fig.19 , the UE may be commonly configured for the initial (UL) BWP of the cell, and the UE may be configured or instructed to repeatedly transmit the PUSCH in the (uplink) time slots (time slots n+1 to n+3) of the configured subbands and in the (uplink) time slots (time slots n to n+3) of the unconfigured subbands (time slot n+4). In addition, the UE may be configured or instructed to perform intra-slot frequency hopping or inter-slot frequency hopping for PUSCH repetitive transmissions. Fig.19 In , it is assumed that the UE is configured or instructed to perform inter-slot frequency hopping for PUSCH repetitive transmissions. Fig.19 , the UE can use the size of the initial (UL) BWP and the offset value (RB offset) determines the first hop and the second hop. At this time, in order to maximize the frequency diversity gain in a manner used in a legacy NR system that does not consider SBFD operation, the UE can be configured with an offset value for determining the frequency hopping based on a time slot (time slot n+4) in which the subband is not configured. In this case, the second frequency hop can be determined as a PRB outside the uplink subband in the time slot (time slot n+2) in which the subband is configured. That is, the second hop determined based on the offset value configured relative to time slot n+4 is located in a PRB outside the uplink subband in time slot n+2. That is, because the second frequency hop is configured at the position of the downlink PRB, the UE cannot send PUSCH in time slot n+2.

[0281] For example, refer to Fig. 20 , the configured UE-specific (UL) BWP may be activated in each of UE#1 and UE#2. Fig. 20 (a), UE#1 may be configured or instructed to repeatedly transmit PUSCH in (uplink) time slots (time slot n+1 to time slot n+3) among (uplink) time slots (time slot n to time slot n+3) of configured subbands and (uplink) time slots (time slot n+4) of unconfigured subbands. Fig. 20 (b), UE#2 may be configured or instructed to repeatedly transmit PUSCH in an (uplink) time slot (time slot n+5 to time slot n+7) among an (uplink) time slot (time slot n+4) for which a subband is not configured and an (uplink) time slot (time slot n+5 to time slot n+8) for which a subband is configured. In addition, UE#1 and UE#2 may be configured or instructed to perform intra-time slot hopping or inter-time slot hopping for PUSCH repetitive transmission. Fig. 20 , it is assumed that UE#1 and UE#2 are configured or instructed to perform inter-slot frequency hopping for PUSCH repetition transmission. UE#1 and UE#2 may determine the first hop and the second hop, respectively, by using (i) the size of the activated UE-specific (UL) BWP and (ii) an offset value for determining the frequency hopping, both of which are configured by the base station. In this case, in order to maximize the frequency diversity gain in a manner used in a legacy NR system that does not consider SBFD operation, the UE may be configured with an offset value based on a time slot in which a subband is not configured (time slot n+4). In this case, the second frequency hop may be determined to be a PRB outside the uplink subband in the time slot in which the subband is configured ( Fig. 20 (a) time slot n+2 and Fig. 20(b) of time slot n+5 and time slot n+7). That is, the second hopping determined based on the offset value configured with respect to time slot n+4 is located in the PRB outside the uplink subband in time slot n+2, time slot n+5 and time slot n+7. That is, because the second hopping is configured at the position of the downlink PRB, the UE cannot transmit the PUSCH in time slot n+2, time slot n+5 and time slot n+7.

[0282] In the following, embodiments for solving the above problems are disclosed. Specifically, embodiments are disclosed to solve the problem that when a UE is configured or instructed to send a PUSCH via frequency hopping in a time slot / symbol configured or instructed for an uplink subband, a frequency hopping position is configured for resources that are not available for uplink transmission, and therefore a PUSCH cannot be sent.

[0283] Specifically, the present disclosure provides a method in which, when frequency hopping is configured in a time slot or symbol in which a UE is configured or indicated to use an uplink subband, the frequency hopping of the PUSCH is located in an uplink transmission area or uplink time slot in which the UE can be used for transmission. In addition, the present disclosure provides a method for enabling the same frequency hopping position to be configured as in a legacy NR system, wherein the legacy NR system does not consider SBFD operation for an (uplink) time slot in which a subband is not configured / indicated.

[0284] First embodiment: Fig.21 and Fig. 22 A first embodiment is shown in the figure.

[0285] refer to Fig.21 , the initial (UL) BWP for the cell may be commonly configured for the UE, and the UE may be configured or instructed to repeatedly transmit the PUSCH in some slots (slot n+1 to slot n+3) among the SBFD slots (slot n to slot n+3) and the non-SBFD slots (slot n+4). In addition, the UE may be configured or instructed to perform inter-slot frequency hopping for PUSCH repetitive transmission. Fig.21 In the example, the UE can use the offset value (RB offset ) to determine the first hopping and the second hopping to determine (i) the size of the initial UL BWP and (ii) the hopping frequency. According to the first embodiment, the hopping frequency on which PUSCH transmission is performed may be configured / determined to be located on the uplink subband transmission area in the SBFD time slots (time slots n+1 to time slots n+3) and have the same position as in the legacy NR system in the non-SBFD time slot (time slot n+4).

[0286] refer to Fig. 22 , the configured UE-specific (UL) BWP may be activated in each of UE#1 and UE#2. Fig. 22(a), UE#1 may be configured or instructed to repeatedly transmit PUSCH in some time slots (time slot n+1 to time slot n+3) among the SBFD time slots (time slot n to time slot n+3) and the non-SBFD time slots (time slot n+4). According to the first embodiment, the frequency hopping on which PUSCH transmission is performed may be configured / determined to be located on the uplink subband transmission area in the SBFD time slots (time slot n+1 to time slot n+3) and have the same position as in the legacy NR system in the non-SBFD time slot (time slot n+4). Reference Fig. 22 (b), UE#2 may be configured or instructed to repeatedly transmit PUSCH in some time slots (time slot n+5 to time slot n+7) among non-SBFD time slots (time slot n+4) and SBFD time slots (time slot n+5 to time slot n+8). In addition, UE#1 and UE#2 may be configured or instructed to perform inter-time slot hopping for repeated PUSCH transmission, and determine the first hop and the second hop by using (i) the size of the UE-specific UL BWP activated in UE#1 and UE#2, respectively, and (ii) the offset value configured by the base station for respectively determining the hopping. According to the first embodiment, the UE may be configured with the same hopping position as the legacy NR system in the non-SBFD time slot (time slot n+4). At the same time, each hopping frequency for performing PUSCH transmission in the SBFD time slot (time slot n+5 to time slot n+7) may be configured / determined to be located on the uplink subband transmission area available for transmission by the UE.

[0287] In the first embodiment, one RB offset for frequency hopping is configured for the UE, as in the existing legacy NR system. The first embodiment provides a method in which frequency hopping for performing PUSCH transmission is configured / determined based on the RB offset so that the frequency hopping is located on the uplink subband transmission area available for UE transmission in the SBFD slot / symbol, and is located in the same manner as in the legacy NR system in the non-SBFD slot / symbol. According to the first embodiment, the UE may not need to be further configured with an RB offset for frequency hopping while performing uplink SBFD operation, and may reuse one RB offset for frequency hopping in the existing legacy NR system.

[0288] Specifically, the UE may determine the first PRB set of the first hop via a DCI for scheduling PUSCH or a DCI / RRC signal for activating CG-PUSCH. Here, the DCI for scheduling PUSCH or the DCI / RRC signal for activating CG-PUSCH may include an FDRA field. The FDRA field may contain information about (i) the RB index starting from the first PRB set of the first hop and (ii) the number of consecutive RBs. When the RB index starting from the first PRB set of the first hop is 0, the RB represents the lowest PRB of the UE's active UL BWP. That is, the RB index starting from the first PRB set of the first hop may be interpreted as the index of the UE's active UL BWP. Subsequently, the UE shall determine the RB index starting from the second PRB set of the second hop. This can be determined by the following formula.

[0289] [Formula 5]

[0290]

[0291] here,

[0292] -M means based on (RB start (0)+RB offset ) values. For example, M contains (RB start (0)+RB offset -RB start,UL ).

[0293] -RB start (0) indicates the RB index of the first PRB set starting with the first hop, and RB start (1) Indicates the RB index at which the second PRB set of the second hop starts.

[0294] -RB offset Indicates the PRB interval between the first PRB set of the first hop and the second PRB set of the second hop. The base station can configure / instruct the UE to use RB offset .

[0295] -RB start,UL is the RB index of the lowest PRB available for uplink transmission in the slot or symbol used to send PUSCH. start,UL There may be different values ​​in SBFD slots / symbols and non-SBFD slots / symbols. Fig. 22 (b), RB in time slot n+4 start,UL and RBs in slots n+5 to n+7 start,UL Can be different values. For example, RB in SBFD slot / symbol start,ULis the starting PRB index (e.g., 0, 1, ..., N) of the uplink subband on the (active UL) BWP sizeBWP-1 One; preferably a positive integer), and the RB in the non-SBFD time slot / symbol start,UL Can be 0.

[0296] -N size UL is the number of PRBs available for uplink transmission in the corresponding slot / symbol among the PRBs of the active UL BWP. The PRBs available for uplink transmission may include PRBs that are not downlink PRBs. That is, the PRBs available for uplink transmission may include uplink or flexible PRBs. In the SBFD slot / symbol(s), N size UL The PRBs included in the UE's active UL BWP may be included among the PRBs in the uplink subband. In non-SBFD slots / symbols, N size UL Equal to N size BWP .

[0297] According to the first embodiment, the second PRB set of the second hopping determined in the SBFD time slot or symbol and the non-SBFD time slot or symbol may include different PRBs. Fig.21 , the second PRB set for the second hop determined by the UE in time slot n+2 and the second PRB set for the second hop determined in time slot n+4 may include different PRBs. Fig. 22 , the second PRB set for the second hop determined by UE#1 in time slot n+2 and the second PRB set for the second hop determined by UE#1 in time slot n+4 may include different PRBs.

[0298] Second embodiment: In the second embodiment, as in the existing legacy NR system, the position of the frequency hopping can be configured for the non-SBFD slot / symbol by using the first RB offset for frequency hopping for the UE in the same manner as the legacy NR system. On the other hand, in the SBFD slot / symbol, the second RB offset for the SBFD operation can be configured so that each frequency hopping in which the PUSCH transmission is performed is located on the uplink subband transmission area available for transmission by the UE. According to the second embodiment, when the UE and the base station perform uplink SBFD operation, the second RB offset for frequency hopping for the SBFD operation needs to be further configured for the UE.

[0299] The UE may determine the first PRB set of the first hop via a DCI for scheduling PUSCH or a DCI / RRC signal for activating CG-PUSCH. Here, the DCI for scheduling PUSCH or the DCI / RRC signal for activating CG-PUSCH may include an FDRA field. The FDRA field may include (i) the RB index starting from the first PRB set of the first hop and (ii) the number of consecutive RBs. When the RB index starting from the first PRB set of the first hop is 0, the RB represents the lowest PRB of the active UL BWP of the UE. That is, the RB index starting from the first PRB set of the first hop may be interpreted as the index of the active UL BWP of the UE. Subsequently, the UE shall determine the RB index starting from the second PRB set of the second hop. To this end, depending on whether the time slot / symbol in which the PUSCH is sent by frequency hopping is a time slot / symbol configured or indicated by the uplink subband, the RB index starting from the second PRB set of the second hop may be determined by applying a first RB offset or a second RB offset.

[0300] Specifically, for non-SBFD time slots / symbols, the first RB offset (ie, RB offset ) to configure the same frequency hopping positions as in the legacy NR system.

[0301] [Formula 6]

[0302]

[0303] Here, RB start (0) indicates the RB index of the first PRB set starting from the first hop, and RB start (1) indicates the RB index of the second PRB set starting with the second hop. offset Indicates the PRB interval between the first PRB set of the first hop and the second PRB set of the second hop. The base station can configure and instruct the UE to use RB offset , and RB offset The value can be 0, 1, ..., N size BWP-1 One of the. size BWP-1 Indicates the number of PRBs included in the UE's active UL BWP.

[0304] On the other hand, for SBFD slots / symbols, a second RB offset (eg, RB offset,SB ), so that each frequency hop for performing PUSCH transmission in a SBFD slot / symbol can be configured to be located within the uplink subband transmission region.

[0305] [Formula 7]

[0306]

[0307] Among them, RB start (0) indicates the RB index of the first PRB set starting from the first hop, and RB start (1) indicates the RB index of the second PRB set starting with the second hop. offset,SB Indicates the PRB interval of the first PRB set of the first hop and the second PRB set of the second hop in the SBFD time slot / symbol. The base station can configure the UE with a specific BWP where the second PRB set of the second hop can be located. The specific BWP may include N size BWP,SB PRBs. The base station can configure and instruct the UE to use RBs offset,SB , and RB offset,SB The value can be 0, 1, ..., N size BWP,SB-1 one of the.

[0308] Third embodiment: The third embodiment provides another method, that is, using the same first RB offset for frequency hopping of the UE as the legacy NR system, configuring the position of the frequency hopping in the same manner as the legacy NR system in the non-SBFD slot / symbol, and configuring the second RB offset for SBFD operation so that the frequency hopping is located on the uplink subband transmission area in the SBFD slot / symbol. According to the third embodiment, when the UE and the base station perform uplink SBFD operation, it is necessary to further configure the second RB offset for the frequency hopping for the SBFD operation for the UE.

[0309] Specifically, the UE may determine the first PRB set of the first hop via a DCI for scheduling PUSCH or a DCI / RRC signal for activating CG-PUSCH. Here, the DCI for scheduling PUSCH or the DCI / RRC signal for activating CG-PUSCH may include an FDRA field. The FDRA field may include (i) the RB index starting from the first PRB set of the first hop and (ii) the number of consecutive RBs. When the RB index starting from the first PRB set of the first hop is 0, the RB represents the lowest PRB of the active UL BWP of the UE. That is, the RB index starting from the first PRB set of the first hop may be interpreted as the index of the active UL BWP of the UE. Subsequently, the UE shall determine the RB index starting from the second PRB set of the second hop.

[0310] At this time, the position of the frequency hopping may be determined differently according to whether the time slot / symbol in which the PUSCH is sent via frequency hopping is a time slot / symbol configured or indicated by the uplink subband. For example, according to whether the time slot / symbol in which the PUSCH is sent via frequency hopping is a time slot / symbol configured or indicated by the uplink subband, the first RB offset (Formula 9) or the second RB offset (Formula 10) may be applied to determine the RB index at which the second PRB set of the second hopping starts.

[0311] Specifically, in a non-SBFD interval time slot / symbol, the first RB offset (ie, RB offset ) configures the frequency hopping positions in the same way as in the legacy NR system.

[0312] [Formula 8]

[0313] RB start (1) = RB start (0)+RB offset

[0314] Here, RB start (0) indicates the RB index of the first PRB set starting from the first hop, and RB start (1) indicates the RB index of the second PRB set starting with the second hop. offset Indicates the PRB interval between the first PRB set of the first hop and the second PRB set of the second hop. The base station can configure / indicate RB to the UE offset , and RB offset The value of can be positive, 0, or negative. More specifically, RB offset The value of can be one of -274, -273, ..., 0, ..., 273, 274. When the RB index of the second PRB set of the second hop obtained by equation 9 is 0, the RB represents the lowest PRB of the active UL BWP of the UE. That is, the RB index of the second PRB set of the second hop (RB start (1)) is interpreted as the index of the active UL BWP of the UE. When the RB index of the second PRB set starting with the second hop is negative, the RB represents a PRB of a lower frequency band than the active UL BWP of the UE. For example, when the RB index of the second PRB set starting with the second hop is -A, the RB represents a PRB that is A PRBs lower than the lowest PRB of the active BWP of the UE.

[0315] For SBFD slots / symbols, the second RB offset (i.e., RB offset,SB ) is configured so that each frequency hop for performing PUSCH transmission in a SBFD slot / symbol is located within the uplink subband transmission region for the UE.

[0316] [Formula 9]

[0317] RB start (1) = RB start (0)+RB offset,SB

[0318] Among them, RB start (0) indicates the RB index of the first PRB set starting from the first hop, and RB start (1) indicates the RB index of the second PRB set starting with the second hop. offset,SB Indicates the PRB interval between the first PRB set of the first hop and the second PRB set of the second hop. The base station can configure / indicate RB to the UE offset,SB , and RB offset,SB The value of can be positive, 0, or negative. More specifically, RB offset,SB The value of can be one of -274, -273, ..., 0, ..., 273, 274. When the RB index of the second PRB set starting with the second hop is 0, the RB represents the lowest PRB of the active UL BWP of the UE. That is, the RB index of the second PRB set starting with the second hop (RB start (1)) can be interpreted as the index of the active UL BWP of the UE. When the RB index of the second PRB set starting from the second hop is negative, the RB indicates a PRB of a lower frequency band than the active UL BWP of the UE. For example, if the RB index of the second PRB set starting from the second hop is -A, the RB indicates a PRB that is A PRBs lower than the lowest PRB of the active BWP of the UE.

[0319] The first to third embodiments may also be applied to Msg3 PUSCH. The UE may be configured or instructed to send PUSCH via frequency hopping in an SBFD slot / symbol during the initial cell access procedure. In this case, the first hop and the second hop may be determined in the frequency domain by the above method. Here, because the UE is before the RRC connection, the uplink subband may be configured or indicated via information received before the Msg3 PUSCH transmission. For example, the uplink subband information may be included in SIB1, and the UE may be configured or instructed to use the uplink subband by receiving SIB1.

[0320] When the first to third embodiments are applied to Msg3 PUSCH, the above RB for obtaining Msg3 PUSCH can be applied. offset The method is used to determine the PRB interval between the first hopping PRB set and the second hopping PRB set, that is, RB offset (See Table 7).

[0321] Alternatively, Msg3 PUSCH RBoffset For example, when the number of PRBs available for uplink transmission in the corresponding time slot / symbol among the PRBs of the initial UL BWP (ie, N size UL ) is less than 50 RB, RB offset Can be and When the number of PRBs available for uplink transmission in the corresponding slot / symbol among the PRBs of the initial UL BWP is equal to or greater than 50 RBs, the RB offset Can be and This can be expressed in Table 8.

[0322] [Table 8]

[0323]

[0324] 2) PUCCH

[0325] When the UE is configured or instructed to send PUCCH via frequency hopping in an SBFD slot / symbol, the UE may consider determining the first hop and the second hop in the frequency domain in the manner used in the legacy NR system. That is, the PUCCH resources configured by the base station for the UE to determine the first hop or the second hop can be applied equally not only to the SBFD slot / symbol, but also to other slots / symbols. In this case, the PRBs configured for the UE as the first hop and the second hop of the PUCCH resources may include PRBs outside the uplink subband, and when the corresponding PRB is a downlink PRB, the UE may not send PUCCH in the corresponding hop.

[0326] Hereinafter, a PUCCH frequency hopping method for solving the above problems will be described. For convenience, a PRB index for determining a first hopping PRB is referred to as a first hopping PRB index, and a PRB index for determining a second hopping PRB is referred to as a second hopping PRB index.

[0327] First embodiment: The UE may further configure an additional second hopping PRB index (hereinafter referred to as the (2-2)th hopping PRB index) in the configuration of the PUCCH resources for SBFD operation, separate from the existing second hopping PRB index (hereinafter referred to as the (2-1)th hopping PRB index) in the configuration of the PUCCH resources configured via RRC in the existing legacy NR system. That is, when hopping is configured for the SBFD slot / symbol, the UE may further configure the (2-2)th hopping PRB index for the SBFD operation so that the hopping for performing PUCCH transmission is located on the uplink subband transmission area. The base station may instruct the UE to use one of the PUCCH resources via DCI. In this case, the UE may determine the location of each frequency hopping for performing PUCCH transmission based on the hopping PRB index in the PUCCH resource. At this time, when the slot / symbol where the frequency hopping is located is a SBFD slot / symbol, the UE may send the PUCCH by applying the (2-2)th hopping PRB index further configured for the frequency hopping in the PUCCH resource configuration. On the other hand, when the time slot / symbol where the frequency hopping is located is a non-SBFD time slot / symbol, the UE can send the PUCCH by applying the (2-1)th hopping PRB index. According to the first embodiment, in the non-SBFD time slot / symbol, the position of the frequency hopping can be configured in the same manner as the legacy NR system by using the (2-1)th hopping PRB index, and in the SBFD time slot / symbol, the (2-2)th hopping PRB index for SBFD operation can be used so that the frequency hopping is located on the uplink subband transmission area.

[0328] As described above, the base station can configure the UE to use a separate second hopping PRB set for SBFD time slots / symbols. Because the base station instructs the UE to use one of the configured PUCCH resources via DCI, the UE can be instructed so that at least the first PUCCH transmission performed in the first hop is performed in the PRB included in the uplink subband. Therefore, the base station can separately configure the UE to use the PRB set only for the second hopping of the PUCCH transmitted in the uplink subband. That is, the UE can be configured so that the second hopping information for the same PUCCH resource configuration has different values ​​for SBFD time slots / symbols and non-SBFD time slots / symbols. For example, refer to Fig.23, the UE may be configured by the base station via RRC to use a PUCCH resource with a PUCCH resource index (pucch-ResourceId) of 0 via PUCCH-Resource. At this time, the UE may be configured with secondHopPRB=20 as the (2-1)th hopping PRB index, and secondHopPRB-r18 for SBFD=10 as the (2-2)th hopping PRB index. When the second hopping transmission is performed in an SBFD slot / symbol, the UE may determine the frequency position (e.g., PRB set) of the second hopping to send the PUCCH by applying the (2-2)th hopping PRB index in the PUCCH resource configuration, i.e., secondHopPRB-r18 for SBFD=10. On the other hand, when the second hopping transmission is performed in a non-SBFD slot / symbol, the UE may determine the frequency position of the second hopping by using the (2-1)th hopping PRB index, i.e., secondHopPRB=20, as in sending the PUCCH in the existing legacy NR system.

[0329] According to the first embodiment, flexible frequency hopping is possible at least for SBFD slots / symbols. However, since PUCCH resources are information configured for UEs via RRC signals, applying PUCCH resources equally to SBFD slots / symbols and non-SBFD slots / symbols may limit flexible PUCCH resource configuration. In the following, an embodiment for flexible PUCCH resource configuration will be disclosed.

[0330] Second embodiment: The UE may be configured to use a second PUCCH resource by the base station via RRC, separate from the first PUCCH resource configured via RRC in the legacy NR system, for configuring PUCCH resources for SBFD operation. For example, when PUCCH is transmitted using frequency hopping in an SBFD slot / symbol, the second PUCCH resource for SBFD operation may be configured so that each frequency hop for performing PUCCH transmission is located on the uplink subband transmission region. The UE may be configured to use one of the second PUCCH resources by the base station via DCI to perform transmission via the corresponding PUCCH resource. In the case of a non-SBFD slot / symbol, the UE may be configured with one of the first PUCCH resources via DCI as in the legacy NR system to perform transmission through the corresponding PUCCH resource.

[0331] As described above, the UE may be configured with a separate second PUCCH resource for the SBFD slot / symbol. That is, the UE may be configured with a separate second PUCCH resource for the SBFD slot / symbol to receive a flexible PUCCH resource configuration from the base station. The second PUCCH resource may be configured with an RRC signal separate from the PUCCH resource configured for the non-SBFD slot / symbol. For example, referring to Fig.24 , when the base station is configured with a PUCCH resource for SBFD operation via an RRC UE, the base station may be configured with a second PUCCH resource of PUCCH-Resource-r18 for SBFD via the RRC UE, separate from the first PUCCH resource configured via PUCCH-Resource in the legacy NR system. Therefore, even if the PUCCH resources are configured with the same PUCCH resource index, information configured in the corresponding PUCCH resource may be different between the first PUCCH resource and the second PUCCH resource.

[0332] In the case where a separate second PUCCH resource is configured for the UE by the base station according to the second embodiment, based on whether the time slot / symbol indicated as sending PUCCH in DCI format 1_0, 1_1 or 1_2 is a SBFD time slot / symbol, the UE can determine whether it is a PUCCH resource indicated by DCI (for example, PRI in DCI) among the PUCCHs from the first PUCCH resource and the second PUCCH resource.

[0333] Table 9 shows an example according to the second embodiment.

[0334] [Table 9]

[0335]

[0336] In addition, the present disclosure relates to a method of determining a PRB set of hopping 0 (hereinafter, PBR set #0) and a PRB set of hopping 1 (hereinafter, PBR set #1) when a UE transmits a PUCCH via frequency hopping in an SBFD slot / symbol before an RRC connection during a cell initial access procedure.

[0337] More specifically, the present disclosure relates to a method of allocating different hoppings, ie, a PRB set of hopping 0 and a PRB set of hopping 1, within an uplink subband when a PUCCH is transmitted via frequency hopping before an RRC connection in an SBFD slot / symbol.

[0338] When the UE transmits a PUCCH before an RRC connection, one PUCCH resource may be selected / determined among 16 PUCCH resources based on the PRI included in the DCI format that schedules the PUCCH as described above and the index of the CCE in which the DCI format is received.

[0339] For example, refer to Fig.25 , the UE can be based on the PRI and CCE index (ie, RB offset BWP =4, r PUCCH =6, N CS =4) determines the PUCCH resource index as 6. In addition, the UE may be configured or instructed to have N size BWP =30 and N size UL =10, that is, the UE may be configured or instructed to have the number of PRBs of the initial UL BWP set to 30 (PRB #0-29), and the number of PRBs available for uplink transmission in the corresponding time slot / symbol among the PRBs of the initial UL BWP may be configured or instructed to have 10 (PRB #8-17). At this time, when the UE determines the frequency hopping by the above-mentioned existing method, the PRB index of hopping 0 may be determined as And the PRB index of jump 1 is determined as In this case, since the PRB of hopping 0 and the PRB of hopping 1 are determined as PRBs unavailable for uplink transmission in slot n, the UE may not transmit the PUCCH in slot n.

[0340] Hereinafter, embodiments for solving the above-mentioned problems are disclosed.

[0341] First embodiment: The UE may determine the PRB index of jump 0 as And the PRB index of jump 1 is determined as Here, RB start,UL Represents the RB index of the lowest PRB available for uplink transmission in the slot / symbol in which the uplink is configured or indicated.

[0342] Specifically, when r PUCCH When it is one of 0, 1, ..., 7, the PRB index of the PUCCH resource hopping 0 can be determined as And the PRB index of hop 1 can be determined as When PUCCH When it is one of 8, 9, ..., 15, the PRB index of the hop 0 of the PUCCH resource can be determined as And the PRB index of hop 1 can be determined as

[0343] For example, refer to Fig.26, the UE can be based on the PRI and CCE index (ie, RB offset BWP =4, r PUCCH =6, NCS=4) determines the PUCCH resource index as 6. In addition, the UE may be configured or instructed to have N size BWP =30, N size UL =10. According to the first embodiment, the UE may determine the PRB index of the transition 0 as +4+1=13, and the PRB index of hop 1 is determined as N size UL +RB start,UL -1- The first embodiment is a method in which, with respect to a time slot / symbol for which an uplink is configured or indicated, the UE aligns an offset and size (i.e., the number of PRBs) for frequency hopping to PRBs available for uplink, such that PRBs for hopping 0 and PRBs for hopping 1 are included in the PRBs available for uplink transmission.

[0344] See also Fig.28 , the UE may be configured or instructed to use a small PRB uplink subband (N size BWP =20, N size UL =5). At this time, when the PRB offset (ie, RB offset BWP ) When determining the PRB for frequency hopping, the PRB index may be outside the PRB available for uplink transmission. In 28, when determining the PRB for frequency hopping according to the first embodiment, the PRB index for hopping 0 may be determined as And the PRB index of hop 1 can be determined as In this case, since the PRB of hopping 0 and the PRB of hopping 1 are determined as PRBs unavailable for uplink transmission in slot n, the UE may not transmit the PUCCH in slot n. An embodiment for solving this will be described below.

[0345] Second embodiment: The UE may determine the PRB index of jump 0 as And the PRB index of jump 1 is determined as

[0346] Specifically, when r PUCCH When it is one of 0, 1, ..., 7, the PRB index of the PUCCH resource hopping 0 can be determined as And the PRB index of hop 1 can be determined as When PUCCH When it is one of 8, 9, ..., 15, the PRB index of the PUCCH resource hop 0 can be determined as And the PRB index of hop 1 can be determined as

[0347] For example, refer to Fig.28 , the UE can be based on the PRI and CCE index (ie, RB offset BWP =4, r PUCCH =6, NCS=4) determines the PUCCH resource index as 6. In addition, the UE may be configured or indicated to have N size BWP =20, N size UL =5. According to the second embodiment, the UE may determine the PRB index of the transition 0 as And the PRB index of jump 1 is determined as The second embodiment is a method in which, with respect to a time slot / symbol for which the UE is configured or indicated to have uplink, the UE aligns an offset and size (i.e., the number of PRBs) for frequency hopping to the PRBs available for uplink transmission, such that the PRBs for hopping 0 and the PRBs for hopping 1 are included in the PRBs available for uplink transmission and the PRB set configured for frequency hopping is always included in the uplink subband, regardless of the PRB offset value (RB) available for uplink transmission. offset BWP ) and the number of PRBs (N size UL )how.

[0348] When the UE determines the PRB set for frequency hopping according to the first or second embodiment, the RB in index=15 of Table 6 size BWP Can be replaced by RB size UL .

[0349] Third embodiment: The UE may determine the PRB index of jump 0 as And the PRB index of jump 1 is determined as Here, RB offset UL,SBIt is an offset determined individually by the UE for frequency hopping in the time slot / symbol in which the uplink is configured or indicated.

[0350] Specifically, when r PUCCH When it is one of 0, 1, ..., 7, the PRB index of the PUCCH resource hopping 0 can be determined as And the PRB index of hop 1 can be determined as When PUCCH When it is one of 8, 9, ..., 15, the PRB index of the hop 0 of the PUCCH resource can be determined as And the PRB index of hop 1 can be determined as

[0351] According to a third embodiment, the UE may separately determine an offset for frequency hopping in a time slot / symbol for configuring or indicating an uplink. The offset may be determined based on information received separately from the base station. Alternatively, the offset may be information included in a separate table for the UE to determine PUCCH resources before RRC connection. That is, the UE may determine the offset for frequency hopping in a time slot / symbol for configuring or indicating an uplink. The offset may be determined based on information received separately from the base station. Alternatively, the offset may be information included in a separate table for the UE to determine PUCCH resources before RRC connection. PUCCH The interpretation applies to indexes on new tables in addition to table 6.

[0352] Fig.29 A signal transmission method according to an example of the present disclosure is illustrated. Fig.29 This corresponds to the first embodiment of the PUSCH case. Fig.29 The operations in may be applied to other embodiments of the PUSCH case in the same / similar manner.

[0353] refer to Fig.29 , the UE receives control information for sending a PUSCH, wherein the control information may include FDRA information (S2902). Thereafter, the UE may send a PUSCH in a first RB set corresponding to a first hop in a UL BWP (S2904). Here, the first RB set may be determined based on the FDRA information. In addition, the UE may send a PUSCH in a second RB set corresponding to a second hop in a UL BWP (S2906). When the second hop belongs to a SBFD symbol set in the time domain, the second RB set may be determined based on a value satisfying the following formula 1:

[0354] Formula 1: M mod N size UL +RB start,UL ,in

[0355] -M means based on (RB start +RB offset ) value, RB start Indicates the starting RB index of the first RB set, RB offset Represents a value with a range from 0 to Nsize BWP-1 The offset of one of the values, and N size BWP Indicates the number of RBs in UL BWP,

[0356] -N size UL represents the number of RBs in the UL subband in the SBFD symbol set,

[0357] -RB start,UL Represents the RB index with the smallest index among the RBs of the UL subband in the UL BWP in the SBFD symbol set.

[0358] When the second hop belongs to a non-SBFD symbol set in the time domain, the second RB set may be determined based on a value satisfying the following formula 2: Formula 2: (RB start +RB offset )mod N size BWP .

[0359] Here, M may include (RB start +RB offset -RB start,UL ).

[0360] Here, the SBFD symbol set includes a DL subband and a UL subband of FDM in the frequency domain, and an RB having a lowest index in the UL subband may be located within the UL BWP.

[0361] Here, no matter whether the first hop belongs to the SBFD symbol set or the non-SBFD symbol set in the time domain, the first RB set can be determined in the same manner based on the FDRA information.

[0362] The method and system of the present disclosure are described with respect to specific embodiments, but a computer system having a general hardware architecture may be used to implement some or all of the configuration elements and operations of the present disclosure.

[0363] The above description of the present disclosure is for illustrative purposes, and those skilled in the art to which the present disclosure belongs will be able to understand that modifications to other specific forms can be easily implemented without changing the technical spirit or essential features of the present disclosure. Therefore, it should be understood that the above embodiments are illustrative in all aspects, rather than restrictive. For example, each element described as a type can be implemented in a distributed manner, and similarly, the elements described as distributed can also be implemented in a combined form.

[0364] The scope of the present disclosure is indicated by the claims to be described hereinafter rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present disclosure.

[0365] The scope of the present disclosure is indicated by the claims described hereinafter rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present disclosure.

Claims

1. A user equipment (UE) used in a wireless communication system, the UE comprising: Communication module; as well as a processor configured to control the communication module, Wherein, the processor is configured to: receiving control information for transmitting a physical uplink shared channel (PUSCH), the control information comprising frequency domain resource assignment (FDRA) information, transmitting the PUSCH in a first resource block (RB) set corresponding to a first hop within an uplink (UL) bandwidth part (BWP), the first RB set being determined based on the FDRA information; and The PUSCH is transmitted in a second RB set corresponding to a second hop within the UL BWP, and when the second hop belongs to a subband non-overlapping full-duplex (SBFD) symbol set in the time domain, the second RB set is determined based on a value satisfying the following equation 1: Formula 1: M mod N size UL +RB start,UL , Where M represents the start +RB offset ) value, RB start Indicates the starting RB index of the first RB set, RB offset Represents a value with a range from 0 to N size BWP -1 value offset, and N size BWP represents the number of RBs of the UL BWP, N size UL represents the number of the RBs in the UL subband within the SBFD symbol set, and RB start,UL represents the index of the RB with the lowest index among the RBs of the UL subband within the UL BWP in the SBFD symbol set.

2. The UE according to claim 1, wherein: In the case where the second hop belongs to a non-SBFD symbol set in the time domain, the second RB set is determined based on a value satisfying the following equation 2: Formula 2: (RB start +RB offset ) mod N size BWP .

3. The UE according to claim 1, wherein: M includes (RB start +RB offset -RB startUL ).

4. The UE according to claim 1, wherein: The SBFD symbol set includes UL subbands and DL subbands that are frequency division multiplexed (FDMed) in the frequency domain, and The RB with the lowest index in the UL subband is located within the UL BWP.

5. The UE according to claim 1, wherein: Regardless of whether the first hop belongs to the SBFD symbol set or the non-SBFD symbol set in the time domain, the first RB set is determined identically based on the FDRA information.

6. A method used by a UE in a wireless communication system, the method comprising: receiving control information for transmitting a physical uplink shared channel (PUSCH), the control information comprising frequency domain resource assignment (FDRA) information, transmitting the PUSCH in a first resource block (RB) set corresponding to a first hop within an uplink (UL) bandwidth part (BWP), the first RB set being determined based on the FDRA information; and The PUSCH is transmitted in a second RB set corresponding to a second hop within the UL BWP, and when the second hop belongs to a subband non-overlapping full-duplex (SBFD) symbol set in the time domain, the second RB set is determined based on a value satisfying the following equation 1: Formula 1: M mod N size UL +RB start,UL , Where M represents the start +RB offset ) value, RB start Indicates the starting RB index of the first RB set, RB offset Represents a value with a range from 0 to N size BWP -1 value offset, and N size BWP represents the number of RBs of the UL BWP, N size UL represents the number of the RBs in the UL subband within the SBFD symbol set, and RB start,UL represents the index of the RB with the lowest index among the RBs of the UL subband within the UL BWP in the SBFD symbol set.

7. The method according to claim 6, wherein: In the case where the second hop belongs to a non-SBFD symbol set in the time domain, the second RB set is determined based on a value satisfying the following equation 2: Formula 2: (RB start +RB offset ) mod N size BWP .

8. The method according to claim 6, wherein: M includes (RB start +RB offset -RB start,UL ).

9. The method according to claim 6, wherein: The SBFD symbol set includes UL subbands and DL subbands that are frequency division multiplexed (FDMed) in the frequency domain, and The RB with the lowest index in the UL subband is located within the UL BWP.

10. The method according to claim 6, wherein: Regardless of whether the first hop belongs to the SBFD symbol set or the non-SBFD symbol set in the time domain, the first RB set is determined identically based on the FDRA information.

11. A base station used in a wireless communication system, the base station comprising: Communication module; as well as a processor configured to control the communication module, Wherein, the processor is configured as follows: sending control information for receiving a physical uplink shared channel (PUSCH), the control information comprising frequency domain resource assignment (FDRA) information, receiving the PUSCH in a first resource block (RB) set corresponding to a first hop within an uplink (UL) bandwidth part (BWP), the first RB set being determined based on the FDRA information; and The PUSCH is received in a second RB set corresponding to a second hop within the UL BWP, and in a case where the second hop belongs to a subband non-overlapping full-duplex (SBFD) symbol set in the time domain, the second RB set is determined based on a value satisfying the following equation 1, Formula 1: M mod N size UL +RB start,UL , Where M represents the start +RB offset ) value, RB start Indicates the starting RB index of the first RB set, RB offset Represents a value with a range from 0 to N size BWP -1 value offset, and N size BWP represents the number of RBs of the UL BWP, N size UL represents the number of the RBs in the UL subband within the SBFD symbol set, and RB start,UL represents the index of the RB with the lowest index among the RBs of the UL subband within the UL BWP in the SBFD symbol set.

12. The base station according to claim 11, wherein: In the case where the second hop belongs to a non-SBFD symbol set in the time domain, the second RB set is determined based on a value satisfying the following equation 2: Formula 2: (RB start +RB offset ) mod N size BWP .

13. The base station according to claim 11, wherein: M includes (RB start +RB offset -RB start,UL ).

14. The base station according to claim 11, wherein: The SBFD symbol set includes UL subbands and DL subbands that are frequency division multiplexed (FDMed) in the frequency domain, and The RB with the lowest index in the UL subband is located within the UL BWP.

15. The base station according to claim 11, wherein: Regardless of whether the first hop belongs to the SBFD symbol set or the non-SBFD symbol set in the time domain, the first RB set is determined identically based on the FDRA information.

16. A method for use by a base station in a wireless communication system, the method comprising: sending control information for receiving a physical uplink shared channel (PUSCH), the control information comprising frequency domain resource assignment (FDRA) information, receiving the PUSCH in a first resource block (RB) set corresponding to a first hop within an uplink (UL) bandwidth part (BWP), the first RB set being determined based on the FDRA information; and The PUSCH is received in a second RB set corresponding to a second hop within the UL BWP, and in a case where the second hop belongs to a subband non-overlapping full-duplex (SBFD) symbol set in the time domain, the second RB set is determined based on a value satisfying the following equation 1, Formula 1: M mod N size UL +RB start,UL , Where M represents the start +RB offset ) value, RB start Indicates the starting RB index of the first RB set, RB offset Represents a value with a range from 0 to N size BWP -1 value offset, and N size BWP represents the number of RBs of the UL BWP, N size UL represents the number of the RBs in the UL subband within the SBFD symbol set, and RB start,UL represents the index of the RB with the lowest index among the RBs of the UL subband within the UL BWP in the SBFD symbol set.

17. The method according to claim 16, wherein: In the case where the second hop belongs to a non-SBFD symbol set in the time domain, the second RB set is determined based on a value satisfying the following equation 2: Formula 2: (RB start + RB offset ) mod N size BWP .

18. The method according to claim 16, wherein: M includes (RB start +RB offset -RB start,UL ).

19. The method according to claim 16, wherein: The SBFD symbol set includes UL subbands and DL subbands that are frequency division multiplexed (FDMed) in the frequency domain, and The RB with the lowest index in the UL subband is located within the UL BWP.

20. The method according to claim 16, wherein: Regardless of whether the first hop belongs to the SBFD symbol set or the non-SBFD symbol set in the time domain, the first RB set is determined identically based on the FDRA information.

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