Method and apparatus for allocating radio resources in in-band full duplex communication

Abstract

A method and apparatus for allocating radio resources in in-band full duplex communication are disclosed. The method of the terminal comprises the following steps: receiving time slot format information from a base station; determining a DL interval, an FL interval, and an UL interval based on the slot format information; receiving UL sub-band information from the base station; and if the UL sub-band indicated by the UL sub-band information overlaps the DL resource region in the DL interval, treating the DL resource region as a UL resource region.

Description

Technical Field

[0001] The present disclosure relates to signal transmission and reception techniques in communication systems, and more particularly to techniques for radio resource allocation and scheduling in in-band full-duplex communications. Background Art

[0002] After the commercialization of the fifth generation (5G) communication, all walks of life are looking forward to taking advantage of the innovation and economic benefits of 5G technology. 5G communication systems (e.g., new radio (NR) communication systems) support more diverse services and scenarios than traditional communication systems. In order to support a variety of services and scenarios, 5G communication systems use advanced technologies, and the available frequency bands of 5G communication systems have been extended to millimeter wave bands. The usage scenarios of 5G communication systems include enhanced mobile broadband (eMBB), ultra-reliable low latency communication (URLLC), and massive machine type communication (mMTC). In addition to the above scenarios, dedicated functions for various vertical industries are constantly being introduced in 5G communication systems, and the functions and technologies of 5G communication systems are constantly evolving.

[0003] Meanwhile, the NR time division duplex (TDD) system can still only support half-duplex communication, so there may be technical limitations. In-band full-duplex communication can be a key technology for improving spectrum efficiency and expanding uplink coverage. Efforts are needed to apply in-band full-duplex communication to 5G communication systems and new communication systems after 5G communication systems (such as 6G communication systems). Summary of the invention

[0004] Technical issues

[0005] The present disclosure is directed to providing a method and apparatus for radio resource allocation and scheduling in in-band full-duplex communication.

[0006] Technical Solution

[0007] According to an exemplary embodiment of the present disclosure, a method for a terminal to achieve the above-mentioned purpose may include: receiving time slot format information from a base station; identifying a downlink (DL) period, a flexible (FL) period and an uplink (UL) period based on the time slot format information; receiving UL subband information from the base station; and in response to the UL subband indicated by the UL subband information overlapping with a DL resource area within the DL period, treating the DL resource area as a UL resource area, wherein a period in which a DL resource area overlapping with the UL subband exists is a subband full-duplex (SBFD) period, and a period in which a DL resource area overlapping with the UL subband does not exist is a non-SBFD period.

[0008] When the UL subband overlaps with the FL resource region within the FL period, the FL resource region may be regarded as the UL resource region, and the SBFD period may include a period in which the DL resource region overlapping with the UL subband exists and a period in which the FL resource region overlapping with the UL subband exists.

[0009] The transmission direction based on the UL subband information may have a higher priority than the transmission direction based on the slot format information, and the transmission direction may be at least one of DL, FL, or UL.

[0010] The UL subband information may include time resource information and frequency resource information. The frequency resource information may indicate a resource block (RB) set. The RB set may include one or more RBs.

[0011] The method may also include: receiving configuration information of a first physical downlink control channel (PDCCH) resource set associated with a non-SBFD period and configuration information of a second PDCCH resource set associated with a SBFD period from a base station; performing a first monitoring operation on the first PDCCH resource set during the non-SBFD period; and performing a second monitoring operation on the second PDCCH resource set during the SBFD period, wherein each of the first PDCCH resource set and the second PDCCH resource set includes one or more search space sets.

[0012] Upon transition from a non-SBFD period to a SBFD period, a PDCCH resource set monitored by the terminal may be switched from a first PDCCH resource set to a second PDCCH resource set.

[0013] Each of the non-SBFD period and the SBFD period may be configured on a slot basis or a symbol basis, and a switching operation of a PDCCH resource set may be performed on a slot basis.

[0014] The method may also include: receiving configuration information of a first PDCCH resource set associated with a non-SBFD period and configuration information of a second PDCCH resource set associated with a SBFD period from a base station; performing a first monitoring operation on a PDCCH resource set determined according to a predefined standard in a time slot n including the non-SBFD period and the SBFD period; and performing a second monitoring operation on the first PDCCH resource set in a time slot n+1 including only the non-SBFD period, wherein n is a natural number.

[0015] When the SBFD period includes M or more symbols in slot n, one PDCCH resource set may be determined as a second PDCCH resource set in slot n, where M is a natural number.

[0016] When the duration of the control resource set (CORESET) belonging to the second PDCCH resource set includes L symbols, M may be greater than or equal to L, where L is a natural number.

[0017] When the priority of the non-SBFD period is higher than the priority of the SBFD period, one PDCCH resource set may be determined as the first PDCCH resource set in slot n.

[0018] The method may also include: receiving configuration information of CORESET, configuration information of a first frequency domain opportunity associated with CORESET, and configuration information of a second frequency domain opportunity associated with CORESET from a base station; performing a first monitoring operation on a first search space set formed based on the first frequency domain opportunity in a non-SBFD period; and performing a second monitoring operation on a second search space set formed based on the second frequency domain opportunity in a SBFD period.

[0019] According to an exemplary embodiment of the present disclosure, a method of a base station for achieving the above-mentioned purpose may include: transmitting time slot format information indicating a downlink (DL) period, a flexible (FL) period and an uplink (UL) period to a terminal; transmitting UL subband information to the terminal; in response to the UL subband indicated by the UL subband information overlapping with a DL resource region within the DL period, treating the DL resource region as a UL resource region; and communicating with the terminal in a subband full-duplex (SBFD) period and a non-SFBD period, the subband full-duplex period being a period in which there is a DL resource region overlapping with the UL subband, and the non-SFBD period being a period in which there is no DL resource region overlapping with the UL subband.

[0020] When the UL subband overlaps with the FL resource region within the FL period, the FL resource region may be considered as the UL resource region, and the SBFD period may include a period in which the DL resource region overlaps with the UL subband and a period in which the FL resource region overlaps with the UL subband.

[0021] The method may also include: transmitting configuration information of a first physical downlink control channel (PDCCH) resource set associated with a non-SBFD period and configuration information of a second PDCCH resource set associated with a SBFD period to a terminal; and transmitting control information to the terminal in at least one of the first PDCCH resource set or the second PDCCH resource set, wherein a first monitoring operation is performed on the first PDCCH resource set during the non-SBFD period, and a second monitoring operation is performed on the second PDCCH resource set during the SBFD period, and each of the first PDCCH resource set and the second PDCCH resource set includes one or more search space sets.

[0022] The method may also include: transmitting configuration information of a first PDCCH resource set associated with a non-SBFD period and configuration information of a second PDCCH resource set associated with a SBFD period to the terminal; and in time slot n including the non-SBFD period and the SBFD period, transmitting control information of a PDCCH resource set determined according to a predefined standard in the first PDCCH resource set and the second PDCCH resource set to the terminal, where n is a natural number.

[0023] The method may also include: transmitting configuration information of a control resource set (CORESET), configuration information of a first frequency domain opportunity associated with the CORESET, and configuration information of a second frequency domain opportunity associated with the CORESET to the terminal; and transmitting control information in at least one of a first search space set or a second search space set to the terminal, wherein the first search space set is formed based on a first frequency domain opportunity during a non-SBFD period, and the second search space set is formed based on a second frequency domain opportunity during a SBFD period.

[0024] According to an exemplary embodiment of the present disclosure, a terminal for achieving the above-mentioned purpose may include: at least one processor, which can enable the terminal to execute: receiving time slot format information from a base station; identifying a downlink (DL) period, a flexible (FL) period and an uplink (UL) period based on the time slot format information; receiving UL subband information from the base station; and in response to the UL subband indicated by the UL subband information overlapping with a DL resource area within the DL period, treating the DL resource area as a UL resource area, wherein a period in which a DL resource area overlapping with the UL subband exists is a subband full-duplex (SBFD) period, and a period in which a DL resource area overlapping with the UL subband does not exist is a non-SBFD period.

[0025] At least one processor can also enable the terminal to perform: receiving configuration information of a first physical downlink control channel (PDCCH) resource set associated with a non-SBFD period and configuration information of a second PDCCH resource set associated with a SBFD period from a base station; performing a first monitoring operation on the first PDCCH resource set during the non-SBFD period; and performing a second monitoring operation on the second PDCCH resource set during the SBFD period, wherein each of the first PDCCH resource set and the second PDCCH resource set includes one or more search space sets.

[0026] At least one processor may also enable the terminal to execute: receiving configuration information of a first PDCCH resource set associated with a non-SBFD period and configuration information of a second PDCCH resource set associated with a SBFD period from a base station; performing a first monitoring operation on a PDCCH resource set determined according to a predefined standard in a time slot n including the non-SBFD period and the SBFD period in the first PDCCH resource set and the second PDCCH resource set; and performing a second monitoring operation on the first PDCCH resource set in a time slot n+1 including only the non-SBFD period, where n is a natural number.

[0027] Beneficial Effects

[0028] According to the present disclosure, a base station may transmit slot format information and UL subband information to a terminal. The terminal may identify a subband full duplex (SBFD) period and a non-SBFD period based on the slot format information and the UL subband information. The terminal may perform a monitoring operation on reception of downlink control information (DCI) based on a predefined standard in each of the SBFD period and the non-SBFD period. Therefore, communication may be effectively performed in the SBFD period and the non-SBFD period. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a conceptual diagram illustrating a first exemplary embodiment of a communication system.

[0030] Figure 2 is a block diagram showing a first exemplary embodiment of an apparatus.

[0031] Figure 3 is a conceptual diagram illustrating a first exemplary embodiment of an in-band full-duplex communication method.

[0032] Figure 4 is a conceptual diagram showing a first exemplary embodiment of a method of multiplexing an uplink signal and a downlink signal in full-duplex communication.

[0033] Figure 5 is a conceptual diagram illustrating a first exemplary embodiment of a method of configuring resources in a SBFD period.

[0034] Figure 6 is a conceptual diagram illustrating a second exemplary embodiment of a method of configuring resources in a SBFD period.

[0035] Figure 7 is a conceptual diagram illustrating a third exemplary embodiment of a method of configuring resources in a SBFD period.

[0036] Fig. 8A is a conceptual diagram showing a first exemplary embodiment of a method of arranging a guard period between a downlink period and an SBFD period.

[0037] Figure 8B is a conceptual diagram showing a second exemplary embodiment of a method of arranging a guard period between a downlink period and an SBFD period.

[0038] Fig. 9 is a conceptual diagram showing a first exemplary embodiment of a slot format configuration and a PDCCH monitoring resource configuration.

[0039] Fig.10 is a conceptual diagram showing a first exemplary embodiment of a PDCCH resource set switching method based on a slot format.

[0040] Fig.11 is a conceptual diagram illustrating a second exemplary embodiment of a PDCCH resource set switching method based on a slot format.

[0041] Fig.12 is a conceptual diagram illustrating a third exemplary embodiment of a PDCCH resource set switching method based on a slot format.

[0042] Fig.13A is a conceptual diagram illustrating a first exemplary embodiment of a method for arranging frequency domain opportunities associated with a CORESET.

[0043] Fig. 13B is a conceptual diagram illustrating a second exemplary embodiment of a method for arranging frequency domain opportunities associated with a CORESET.

[0044] Fig.14 is a conceptual diagram showing a first exemplary embodiment of a PUCCH resource set switching method based on a slot format. DETAILED DESCRIPTION

[0045] Exemplary embodiments of the present disclosure are disclosed herein. However, for the purpose of describing the embodiments of the present disclosure, the specific structural and functional details disclosed herein are merely representative. It should be understood that the present disclosure is not limited to the specific forms disclosed, but on the contrary, the present disclosure encompasses all modifications, equivalents, and alternatives that fall within the spirit and scope of the present disclosure. Throughout the description of the accompanying drawings, the same numbers refer to the same elements.

[0046] It should be understood that although the terms first, second, etc. can be used to describe various elements in this article, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the present disclosure, the first element can be referred to as the second element, and similarly, the second element can also be referred to as the first element. As used herein, the term "and / or" includes any and all combinations of one or more related listed items.

[0047] In exemplary embodiments of the present disclosure, “at least one of A and B” may refer to “at least one of A or B” or “at least one of a combination of one or more of A and B”. Furthermore, “one or more of A and B” may refer to “one or more of A or B” or “one or more of a combination of one or more of A and B”.

[0048] It should be understood that when an element is referred to as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intervening elements. Conversely, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements. Other words used to describe the relationship between elements should be interpreted in a similar manner (i.e., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.).

[0049] The terms used herein are only used to describe specific embodiments and are not intended to limit the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are also intended to include plural forms. It should also be understood that the terms "include", "comprise", "include" and / or "comprises" when used herein specify the presence of the features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0050] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present disclosure belongs. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted as an idealized or overly formal meaning unless explicitly defined herein.

[0051] The exemplary embodiments of the present disclosure will be described in more detail below in conjunction with the accompanying drawings. In order to facilitate general understanding when describing the present disclosure, the same components in the drawings are represented by the same reference numerals, and their repeated descriptions will be omitted.

[0052] The communication system to which the exemplary embodiment of the present disclosure is applied will be described. The communication system may be a 4G communication system (e.g., a long term evolution (LTE) communication system or an LTE-A communication system), a 5G communication system (e.g., a new radio (NR) communication system), a sixth generation (6G) communication system, etc. The 4G communication system may support communication in a frequency band of 6 GHz or below, while the 5G communication system may support communication in a frequency band of 6 GHz or above and a frequency band of 6 GHz or below. The communication system to which the exemplary embodiment of the present disclosure is applied is not limited to the contents described below, and may be applied to various communication systems according to the exemplary embodiment of the present disclosure. Here, the communication system may be used in the same sense as the communication network, and "LTE" may refer to a "4G communication system", "LTE communication system" or "LTE-A communication system", and "NR" may refer to a "5G communication system" or "NR communication system".

[0053] In an exemplary embodiment, "configuration of an operation (e.g., a transmission operation)" may mean "signaling of configuration information (e.g., information element, parameter) of the operation" and / or "signaling of information indicating that an operation is to be performed". In other words, "an operation (e.g., a transmission operation) is configured in a communication node" may mean that the communication node receives "configuration information (e.g., information element, parameter) of the operation" and / or "information indicating that an operation is to be performed". "Information elements (e.g., parameters) are configured in a communication node" may mean that the information elements are transmitted to the communication node in a signaling manner (e.g., the communication node receives the information elements)". The signaling may be at least one of system information (SI) signaling (e.g., transmission of system information blocks (SIBs) and / or master information blocks (MIBs)), RRC signaling (e.g., transmission of RRC parameters and / or higher layer parameters), MAC control element (CE) signaling, or PHY signaling (e.g., transmission of downlink control information (DCI), uplink control information (UCI), and / or sidelink control information (SCI)).

[0054] Figure 1 is a conceptual diagram illustrating a first exemplary embodiment of a communication system.

[0055] refer to Figure 1, the communication system 100 may include a plurality of communication nodes 110-1, 110-2, 110-3, 120-1, 120-2, 130-1, 130-2, 130-3, 130-4, 130-5, and 130-6. In addition, the communication system 100 may further include a core network (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), and a mobility management entity (MME)). When the communication system 100 is a 5G communication system (e.g., a new radio (NR) system), the core network may include an access and mobility management function (AMF), a user plane function (UPF), a session management function (SMF), and the like.

[0056] The plurality of communication nodes 110 to 130 may support communication protocols defined in the 3rd Generation Partnership Project (3GPP) technical specifications (eg, LTE communication protocol, LTE-A communication protocol, NR communication protocol, etc.). The plurality of communication nodes 110 to 130 may support a communication protocol based on code division multiple access (CDMA), a communication protocol based on wideband CDMA (WCDMA), a communication protocol based on time division multiple access (TDMA), a communication protocol based on frequency division multiple access (FDMA), a communication protocol based on orthogonal frequency division multiplexing (OFDM), a communication protocol based on filtered OFDM, a communication protocol based on cyclic prefix OFDM (CP-OFDM), a communication protocol based on discrete Fourier transform spread OFDM (DFT-s-OFDM), a communication protocol based on orthogonal frequency division multiple access (OFDMA), a communication protocol based on single carrier FDMA (SC-FDMA), a communication protocol based on non-orthogonal multiple access (NOMA), a communication protocol based on generalized frequency division multiplexing (GFDM), a communication protocol based on filter band multi-carrier (FBMC), a communication protocol based on universal filter multi-carrier (UFMC), a communication protocol based on space division multiple access (SDMA), etc. Each of the plurality of communication nodes may represent a device or apparatus. The exemplary embodiments may be performed by an apparatus or device. The structure of the apparatus (or device) may be as follows.

[0057] Figure 2 is a block diagram showing a first exemplary embodiment of an apparatus.

[0058] See also Figure 2 , the apparatus 200 may include at least one processor 210, a memory 220, and a transceiver 230 connected to a network for communication. In addition, the apparatus 200 may also include an input interface device 240, an output interface device 250, a storage device 260, etc. The various components included in the apparatus 200 may be connected via a bus 270 and communicate with each other.

[0059] The processor 210 may execute a program stored in at least one of the memory 220 and the storage device 260. The processor 210 may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which the method according to the embodiment of the present disclosure is executed. Each of the memory 220 and the storage device 260 may be composed of at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory 220 may include at least one of a read-only memory (ROM) and a random access memory (RAM).

[0060] Reference again Figure 1 , the communication system 100 may include a plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 and a plurality of terminals 130-1, 130-2, 130-3, 130-4, 130-5, and 130-6. Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 may form a macro cell, and each of the fourth base station 120-1 and the fifth base station 120-2 may form a small cell. The fourth base station 120-1, the third terminal 130-3, and the fourth terminal 130-4 may belong to the cell coverage of the first base station 110-1. In addition, the second terminal 130-2, the fourth terminal 130-4, and the fifth terminal 130-5 may belong to the cell coverage of the second base station 110-2. In addition, the fifth base station 120-2, the fourth terminal 130-4, the fifth terminal 130-5 and the sixth terminal 130-6 may belong to the cell coverage of the third base station 110-3. In addition, the first terminal 130-1 may belong to the cell coverage of the fourth base station 120-1, and the sixth terminal 130-6 may belong to the cell coverage of the fifth base station 120-2.

[0061] Here, each of the multiple base stations 110-1, 110-2, 110-3, 120-1 and 120-2 can be called NodeB (NB), evolved NodeB (eNB), gNB, advanced base station (ABS), high reliability base station (HR-BS), base transceiver station (BTS), radio base station, radio transceiver, access point (AP), access node, radio access station (RAS), mobile multi-hop relay base station (MMR-BS), relay station (RS), advanced relay station (ARS), high reliability relay station (HR-RS), home NodeB (HNB), home eNodeB (HeNB), road side unit (RSU), radio remote terminal (RRH), transmission point (TP), transmission and reception point (TRP), etc.

[0062] Each of the multiple terminals 130-1, 130-2, 130-3, 130-4, 130-5 and 130-6 can be called a user equipment (UE), a terminal equipment (TE), an advanced mobile station (AMS), a high reliability mobile station (HR-MS), a terminal, an access terminal, a mobile terminal, a station, a user station, a mobile station, a portable user station, a node, a device, an on-board unit (OBU), etc.

[0063] At the same time, each of the multiple base stations 110-1, 110-2, 110-3, 120-1 and 120-2 can operate in the same frequency band or in different frequency bands. The multiple base stations 110-1, 110-2, 110-3, 120-1 and 120-2 can be connected to each other through an ideal backhaul link or a non-ideal backhaul link, and exchange information with each other through the ideal backhaul link or the non-ideal backhaul link. And, each of the multiple base stations 110-1, 110-2, 110-3, 120-1 and 120-2 can be connected to the core network through an ideal backhaul link or a non-ideal backhaul link. Each of the multiple base stations 110-1, 110-2, 110-3, 120-1 and 120-2 can transmit the signal received from the core network to the corresponding terminal 130-1, 130-2, 130-3, 130-4, 130-5, or 130-6, and transmit the signal received from the corresponding terminal 130-1, 130-2, 130-3, 130-4, 130-5 or 130-6 to the core network.

[0064] In addition, each of the multiple base stations 110-1, 110-2, 110-3, 120-1 and 120-2 can support multiple-input multiple-output (MIMO) transmission (e.g., single-user MIMO (SU-MIMO), multi-user MIMO (MU-MIMO), massive MIMO, etc.), coordinated multi-point (CoMP) transmission, carrier aggregation (CA) transmission, unlicensed band transmission, device-to-device (D2D) communication (or near field service (ProSe)), Internet of Things (IoT) communication, dual connectivity (DC), etc. Here, each of the multiple terminals 130-1, 130-2, 130-3, 130-4, 130-5 and 130-6 can perform operations corresponding to the operations of the multiple base stations 110-1, 110-2, 110-3, 120-1 and 120-2 (i.e., operations supported by the multiple base stations 110-1, 110-2, 110-3, 120-1 and 120-2). For example, the second base station 110-2 may transmit a signal to the fourth terminal 130-4 in SU-MIMO mode, and the fourth terminal 130-4 may receive a signal from the second base station 110-2 in SU-MIMO mode. Alternatively, the second base station 110-2 may transmit a signal to the fourth terminal 130-4 and the fifth terminal 130-5 in MU-MIMO mode, and the fourth terminal 130-4 and the fifth terminal 130-5 may receive a signal from the second base station 110-2 in MU-MIMO mode.

[0065] Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 can transmit a signal to the fourth terminal 130-4 in a CoMP transmission manner, and the fourth terminal 130-4 can receive signals from the first base station 110-1, the second base station 110-2, and the third base station 110-3 in a CoMP manner. In addition, each of the multiple base stations 110-1, 110-2, 110-3, 120-1, and 120-2 can exchange signals with the corresponding terminal 130-1, 130-2, 130-3, 130-4, 130-5, or 130-6 belonging to its cell coverage in a CA manner. Each of base stations 110-1, 110-2 and 110-3 can control D2D communication between the fourth terminal 130-4 and the fifth terminal 130-5, so the fourth terminal 130-4 and the fifth terminal 130-5 can perform D2D communication under the control of the second base station 110-2 and the third base station 110-3.

[0066] The present disclosure may relate to a technology for transmitting and receiving signals in a communication system. In in-band full-duplex communication, a base station may allocate uplink resources and downlink resources to a terminal and schedule the allocated resources. In addition to the NR communication system, exemplary embodiments of the present disclosure may also be applied to various other communication systems (e.g., LTE communication systems, 5G communication systems, sixth generation (6G) communication systems, etc.).

[0067] The parameter set of the physical signal and channel applied to the communication system (for example, NR communication system or 6G communication system) may be variable. The parameter set may vary to meet various technical requirements of the communication system. In a communication system applying OFDM waveform technology based on cyclic prefix (CP), the parameter set may include subcarrier spacing and CP length (or CP type). Table 1 below may be a first exemplary embodiment of a parameter set configuration for OFDM based on CP. The subcarrier spacing may have an exponential multiplication relationship of 2, and the CP length may be scaled at the same rate as the OFDM symbol length. Depending on the frequency band in which the communication system operates, at least some of the parameter sets in the parameter set of Table 1 may be supported. In addition, in the communication system, parameter sets not listed in Table 1 may also be supported. For a specific subcarrier spacing (for example, 60kHz), CP types not listed in Table 1 (for example, extended CP) may be additionally supported.

[0068] [Table 1]

[0069]

[0070] In the following description, the frame structure in the communication system will be described. In the time domain, the elements constituting the frame structure may include a subframe, a time slot, a mini time slot, a symbol, etc. A subframe may be used as a unit for transmission, measurement, etc., and the length of a subframe may have a fixed value (e.g., 1 ms) regardless of the subcarrier spacing. A time slot may include consecutive symbols (e.g., 14 OFDM symbols). The length of a time slot may be different from the length of a subframe and may be variable. For example, the length of a time slot may be inversely proportional to the subcarrier spacing.

[0071] A time slot may be used as a unit for transmission, measurement, scheduling, resource configuration, timing (e.g., scheduling timing, hybrid automatic repeat request (HARQ) timing, channel state information (CSI) measurement and reporting timing, etc.). The length of the actual time resource used for transmission, measurement, scheduling, resource configuration, etc. may not match the length of the time slot. A mini time slot may include consecutive symbols, and the length of a mini time slot may be shorter than the length of a time slot. A mini time slot may be used as a unit for transmission, measurement, scheduling, resource configuration, timing, etc. A mini time slot (e.g., the length of a mini time slot, a mini time slot boundary, etc.) may be predefined in a technical specification. Alternatively, a mini time slot (e.g., the length of a mini time slot, a mini time slot boundary, etc.) may be configured (or indicated) to a terminal. When a specific condition is met, the use of a mini time slot may be configured (or indicated) to the terminal.

[0072] The base station can use part or all of the symbols that make up the time slot to schedule data channels (e.g., physical downlink shared channel (PDSCH), physical uplink shared channel (PUSCH), physical sidelink shared channel (PSSCH)). Specifically, for URLLC transmission, unlicensed band transmission, transmission in the case of coexistence of NR communication system and LTE communication system, and multi-user scheduling based on analog beamforming, part of the time slot can be used to transmit the data channel. In addition, the base station can use multiple time slots to schedule data channels. In addition, the base station can use at least one mini time slot to schedule the data channel.

[0073] In the frequency domain, the elements constituting the frame structure may include resource blocks (RBs), subcarriers, and the like. One RB may include consecutive subcarriers (e.g., 12 subcarriers). The number of subcarriers constituting one RB may be constant, regardless of the parameter set. In this case, the bandwidth occupied by one RB may be proportional to the subcarrier spacing of the parameter set. RBs may be used as transmission and resource allocation units for data channels, control channels, and the like. Resource allocation for data channels may be performed in units of RBs or RB groups (e.g., resource block groups (RBGs)). One RBG may include one or more consecutive RBs. Resource allocation for control channels may be performed in units of control channel elements (CCEs). One CCE in the frequency domain may include one or more RBs.

[0074] In a communication system, a time slot (e.g., a time slot format) may be composed of a combination of one or more of a downlink period, a flexible period (or an unknown period), and an uplink period. Each of the downlink period, the flexible period, and the uplink period may be composed of one or more consecutive symbols. The flexible period may be located between a downlink period and an uplink period, between a first downlink period and a second downlink period, or between a first uplink period and a second uplink period. When a flexible period is inserted between a downlink period and an uplink period, the flexible period may be used as a guard period.

[0075] The time slot may include one or more flexible time periods. Alternatively, the time slot may not include a flexible time period. The terminal may perform predefined operations within the flexible time period. Alternatively, the terminal may semi-statically or periodically perform operations configured by the base station. For example, the periodic operations configured by the base station may include PDCCH monitoring operations, synchronization signal / physical broadcast channel (SS / PBCH) block reception and measurement operations, channel state information-reference signal (CSI-RS) reception and measurement operations, downlink semi-persistent scheduling (SPS) PDSCH reception operations, sounding reference signal (SRS) transmission operations, physical random access channel (PRACH) transmission operations, periodically configured PUCCH transmission operations, PUSCH transmission operations according to the configured authorization, etc. Flexible symbols may be covered by downlink symbols or uplink symbols. When a flexible symbol is covered by a downlink or uplink symbol, the terminal may perform a new operation in the corresponding flexible symbol (e.g., the covered flexible symbol) instead of the existing operation.

[0076] The slot format may be semi-statically configured by high-layer signaling (e.g., radio resource control (RRC) signaling). Information indicating the semi-static slot format may be included in the system information, and the semi-static slot format may be configured in a cell-specific manner. In addition, the semi-static slot format may be additionally configured for each terminal by terminal-specific high-layer signaling (e.g., RRC signaling). The flexible symbols of the cell-specific configured slot format may be overwritten by downlink symbols or uplink symbols by terminal-specific high-layer signaling. In addition, the slot format may be dynamically indicated by physical layer signaling (e.g., a slot format indicator (SFI) included in downlink control information (DCI)). The semi-statically configured slot format may be overwritten by a dynamically indicated slot format. For example, a semi-static flexible symbol may be overwritten by a downlink symbol or an uplink symbol by an SFI.

[0077] The base station and the terminal can perform downlink operations, uplink operations, and sidelink operations in the bandwidth part. The bandwidth part can be defined as a group of continuous RBs (e.g., physical resource blocks (PRBs)) with a specific parameter set in the frequency domain. The RBs constituting a bandwidth part can be continuous in the frequency domain. A parameter set can be used to transmit a signal (e.g., transmission of a control channel or a data channel) in a bandwidth part. In an exemplary embodiment, when used in a broad sense, "signal" can refer to any physical signal and channel. A terminal performing an initial access procedure can obtain configuration information of the initial bandwidth part from the base station through system information. A terminal operating in an RRC connected state can obtain configuration information of the bandwidth part from the base station through terminal-specific high-layer signaling.

[0078] The configuration information of the bandwidth part may include a parameter set (e.g., subcarrier spacing and CP length) applied to the bandwidth part. In addition, the configuration information of the bandwidth part may also include information indicating the position of the starting RB (e.g., starting PRB) of the bandwidth part and information indicating the number of RBs (e.g., PRBs) constituting the bandwidth part. At least one of the bandwidth parts configured in the terminal may be activated. For example, within one carrier, an uplink bandwidth part and a downlink bandwidth part may be activated respectively. In a communication system based on time division duplex (TDD), a pair of uplink bandwidth parts and downlink bandwidth parts may be activated. The base station may configure multiple bandwidth parts for the terminal within one carrier, and may switch the active bandwidth part of the terminal.

[0079] In an exemplary embodiment, an RB may represent a common RB (CRB). Alternatively, an RB may represent a PRB or a virtual RB (VRB). In an NR communication system, a CRB may refer to an RB that constitutes a set of continuous RBs (e.g., a common RB grid) based on a reference frequency (e.g., point A). Carriers, bandwidth parts, etc. may be arranged on a common RB grid. That is, carriers, bandwidth parts, etc. may be composed of CRBs. The RBs or CRBs that constitute the bandwidth part may be referred to as PRBs, and the CRB index within the bandwidth part may be appropriately converted to a PRB index. In an exemplary embodiment, an RB may refer to an interleaved RB (IRB).

[0080] The minimum resource unit constituting the PDCCH may be a resource element group (REG). A REG may consist of one PRB (e.g., 12 subcarriers) in the frequency domain and one OFDM symbol in the time domain. Therefore, one REG may include 12 resource elements (REs). A demodulation reference signal (DMRS) for demodulating the PDCCH may be mapped to 3 of the 12 REs constituting the REG, while control information (e.g., modulated DCI) may be mapped to the remaining 9 REs.

[0081] A PDCCH candidate can consist of one CCE or aggregated CCEs. A CCE can consist of multiple REGs. The NR communication system can support CCE aggregation levels 1, 2, 4, 8, 16, etc., and a CCE can consist of six REGs.

[0082] A control resource set (CORESET) may be a resource region where a terminal performs blind decoding on a PDCCH. A CORESET may be composed of multiple REGs. A CORESET may be composed of one or more PRBs in the frequency domain and one or more symbols (e.g., OFDM symbols) in the time domain. The symbols that make up a CORESET may be continuous in the time domain. The PRBs that make up a CORESET may be continuous or discontinuous in the frequency domain. A DCI (e.g., a PDCCH) may be transmitted within a CORESET. Multiple CORESETs may be configured for a cell and a terminal, and multiple CORESETs may overlap in time-frequency resources.

[0083] The CORESET may be configured in the terminal through the PBCH (e.g., system information or a master information block (MIB) transmitted on the PBCH). The identifier (ID) of the CORESET configured by the PBCH may be 0. That is, the CORESET configured by the PBCH may be referred to as CORESET#0. A terminal operating in the RRC idle state may perform a monitoring operation in CORESET#0 in order to receive the first PDCCH during the initial access process. Not only a terminal operating in the RRC idle state but also a terminal in the RRC connected state may perform a monitoring operation in CORESET#0. The CORESET may be configured in the terminal by other system information (e.g., system information block type 1 (SIB1)) instead of system information transmitted through the PBCH. For example, in order to receive a random access response (or Msg2) during a random access process, the terminal may receive SIB1 including configuration information of the CORESET. In addition, the CORESET may be configured in the terminal by terminal-specific higher-layer signaling (e.g., RRC signaling).

[0084] In each downlink bandwidth part, one or more CORESETs may be configured for the terminal. The terminal may monitor the PDCCH candidates of the CORESET configured in the downlink active bandwidth part. Alternatively, the terminal may monitor the PDCCH candidates of the CORESET (e.g., CORESET#0) configured in the downlink bandwidth part other than the downlink active bandwidth part. The initial downlink active bandwidth part may include CORESET#0 and may be associated with CORESET#0. CORESET#0, which has a quasi-co-location (QCL) relationship with the SS / PBCH block, may be configured for the terminal in the primary cell (PCell), the secondary cell (SCell), and the primary and secondary cell (PSCell). In the secondary cell (SCell), CORESET#0 may not be configured for the terminal.

[0085] The search space can be a set of PDCCH candidates, or a set of resource areas occupied by PDCCH candidates. The terminal can blindly decode each PDCCH candidate in a predefined search space. The terminal can determine whether the PDCCH is transmitted to itself by performing a cyclic redundancy check (CRC) on the result of blind decoding. When it is determined that the PDCCH is the terminal's own PDCCH, the terminal can receive the PDCCH. The terminal can monitor the search space periodically, and can monitor the search space at one or more time positions (e.g., PDCCH monitoring opportunities, CORESET) within a time period.

[0086] The PDCCH candidates may be configured using a CCE selected by a predefined hash function within a CORESET or search space. The search space may be defined and configured for each CCE aggregation level. In this case, the set of search spaces for all CCE aggregation levels may be referred to as a "search space set". In an exemplary embodiment, a "search space" may mean a "search space set", and a "search space set" may mean a "search space".

[0087] A search space set may be logically associated or correspond to a CORESET. A CORESET may be logically associated or correspond to one or more search space sets. A search space set for transmitting a common DCI or a group common DCI may be referred to as a common search space set (hereinafter referred to as a "CSS set"). A common DCI or a group common DCI may include at least one of the resource allocation information of a PDSCH for transmitting system information, paging, power control command, SFI, or preemption indicator. In the case of an NR communication system, the common DCI may correspond to DCI formats 0_0, 1_0, etc., and the cyclic redundancy check (CRC) of the common DCI may be scrambled with system information-radio network temporary identifier (SI-RNTI), paging-RNTI (P-RNTI), random access-RNTI (RA-RNTI), temporary cell-RNTI (TC-RNTI), etc. The group common DCI may correspond to DCI format 2_X (X=0, 1, 2, ...), etc., and the CRC of the group common DCI may be scrambled with a slot format indicator-RNTI (SFI-RNTI), etc. CSS sets may include Type 0, Type 0A, Type 1, Type 2, and Type 3 CSS sets.

[0088] The search space set used to transmit UE-specific DCI may be referred to as a UE-specific search space set (hereinafter referred to as a "USS set"). The UE-specific DCI may include scheduling and resource allocation information for PDSCH, PUSCH, PSSCH, etc. In the case of an NR communication system, the UE-specific DCI may correspond to DCI formats 0_1, 0_2, 1_1, 1_2, 3_0, 3_1, etc., and the CRC of the UE-specific DCI may be scrambled by C-RNTI, configured scheduling-RNTI (CS-RNTI), modulation and coding scheme-C-RNTI (MCS-C-RNTI), etc. UE-specific DCI including a scrambled CRC may be transmitted. Considering scheduling freedom or fallback transmission, UE-specific DCI may be transmitted even in a CSS set. In this case, the UE-specific DCI may be transmitted in a DCI format corresponding to a common DCI. For example, the terminal may monitor a PDCCH (e.g., DCI format 0_0, 0_1) whose CRC is scrambled with C-RNTI, CS-RNTI, MCS-C-RNTI, etc. in the CSS set.

[0089] The Type 0 CSS set may be used to receive DCI that schedules PDSCH containing SIB1 and may be configured via PBCH or cell-specific RRC signaling. The ID of the Type 0 CSS set may be assigned a value of 0 or set to 0. The Type 0 CSS set may be logically combined with CORESET#0.

[0090] The terminal may assume that the PDCCH DM-RS has a QCL relationship with a certain signal (e.g., SS / PBCH block, CSI-RS, PDSCH DM-RS, PDCCH DM-RS, etc.). In addition, since the PDCCH and the corresponding PDCCH DM-RS have the same antenna port, the PDCCH and the PDCCH DM-RS may have a QCL relationship with each other. Therefore, the terminal may obtain information about the large-scale propagation characteristics of the radio channel experienced by the PDCCH and the PDCCH DM-RS through the QCL assumption, and may use the information about the large-scale propagation characteristics for channel estimation, receive beamforming, etc. The QCL parameters may include at least one of delay spread, Doppler spread, Doppler shift, average gain, average delay, or spatial Rx parameters. The spatial Rx parameters may correspond to at least one characteristic of a receive beam, a receive channel spatial correlation, or a transmit / receive beam pair. For convenience, the spatial Rx parameters may be referred to as "spatial QCL". PDCCH may be used to include the meaning of PDCCH DM-RS, and the expression that PDCCH has a QCL relationship with a certain signal may include the meaning that the PDCCH DM-RS of the PDCCH has a QCL relationship with the certain signal. A signal having a QCL relationship with the PDCCH or its resources may be referred to as a QCL source, a QCL source signal, a QCL source resource, etc.

[0091] The PDCCH transmitted in the same CORESET (and the corresponding search space set, PDCCH monitoring opportunity, etc.) can have the same QCL relationship. That is, the unit of the set in which the terminal assumes the same QCL can be CORESET, and the QCL assumption of each CORESET can be independent. In an exemplary embodiment, the QCL, QCL source, etc. of a CORESET can respectively represent the QCL, QCL source, etc. of the PDCCH received by the corresponding CORESET. As an exception, different QCL assumptions can be applied to the search space set corresponding to one CORESET. For example, the search space set (e.g., type 1 CSS set) used to monitor RA-RNTI and other search space sets can have different QCL relationships.

[0092] The QCL relationship or QCL assumption (e.g., QCL source, QCL type, etc.) of a CORESET can be determined by a predefined method. For example, the terminal may assume that the PDCCH DM-RS received through a certain CORESET or a certain search space set has a QCL relationship with the SS / PBCH block and / or CSI-RS selected during the initial access or random access process regarding a predefined QCL type. Here, the QCL type may represent a set of one or more QCL parameters. Alternatively, the QCL relationship or QCL assumption (e.g., QCL source, QCL type, etc.) of a CORESET may be signaled from the base station to the terminal (e.g., through RRC signaling, medium access control (MAC) control unit (CE) signaling, DCI signaling, or a combination thereof). That is, the base station may configure the transmission configuration information (TCI) state of the CORESET to the terminal. In general, the TCI state may include the ID of a signal (e.g., a QCL source or QCL source resource of a PDCCH DM-RS) having a QCL relationship with the DM-RS of the physical channel to which the TCI is applied (e.g., a PDCCH DM-RS), and / or at least one QCL type thereof. For example, the base station can configure one or more TCI state candidates for each CORESET to the terminal through RRC signaling, and indicate or configure one TCI state for the CORESET monitoring of the terminal in one or more TCI state candidates to the terminal through MAC signaling (or DCI signaling). When there is only one TCI state candidate configured by RRC signaling, the MAC signaling process (or DCI signaling process) can be omitted. The terminal can perform PDCCH monitoring and reception operations on the corresponding CORESET based on the TCI state configuration information received from the base station.

[0093] Duplex communication between communication nodes (e.g., base stations, terminals) can be performed based on a half-duplex scheme or a full-duplex scheme. According to the half-duplex scheme, the communication node can perform a signal transmission operation or a signal reception operation at one time. In other words, the communication node cannot perform a transmission operation and a reception operation at the same time. According to the full-duplex scheme, the communication node can perform a transmission operation and a reception operation at the same time. Alternatively, the communication node can perform a transmission operation and a reception operation at different times.

[0094] Full-duplex communication can be easily performed in a frequency division duplex (FDD) system (e.g., a system using an FDD carrier, a paired spectrum, etc.). A communication node can perform transmission and reception operations in separate frequency regions (e.g., an uplink carrier and a downlink carrier). For example, a communication node can perform a transmission operation in a first frequency region and a reception operation in a second frequency region. Therefore, the interference between the transmitted signal and the received signal may be very small. On the other hand, in a time division duplex (TDD) system (e.g., a system using a TDD carrier, an unpaired spectrum, etc.), a communication node can perform a transmission operation and a reception operation in a common frequency region (e.g., a carrier commonly used for uplink and downlink transmissions), and when the transmission operation and the reception operation occur simultaneously, the transmission signal may interfere with the received signal. Therefore, self-interference elimination technology may be required to perform full-duplex communication in a TDD system. Full-duplex communication in a TDD system can be referred to as in-band full-duplex communication. At the same time, since there is no such interference problem, half-duplex communication can be easily performed in an FDD system and a TDD system.

[0095] Figure 3 is a conceptual diagram illustrating a first exemplary embodiment of an in-band full-duplex communication method.

[0096] See also Figure 3 , the base station can perform duplex communication with the terminal based on the full-duplex scheme. For example, the base station can perform a transmitting operation and a receiving operation simultaneously (for example, at the same time). On the other hand, the terminal can perform a transmitting operation or a receiving operation at one time. For example, the base station can transmit a downlink signal to the first terminal at time t1, and receive an uplink signal from the second terminal at time t1. In other words, the base station can perform a transmitting operation and a receiving operation at the same time at time t1. The downlink signal and the uplink signal can be transmitted in the same frequency band (for example, within the same carrier). In this case, the downlink signal will cause self-interference to the reception process of the uplink signal at the base station. The base station can improve the reception performance of the uplink signal by eliminating or mitigating self-interference before detecting the uplink signal from the received signal.

[0097] The uplink signal transmitted by the second terminal may interfere with the reception process of the downlink signal at the first terminal. The interference between the uplink signal and the downlink signal (e.g., uplink and downlink signals transmitted from different communication nodes) may be referred to as cross-link interference. When the distance between the first terminal and the second terminal is close or when the transmission beam direction of the uplink signal transmitted by the second terminal is similar to the direction of the first terminal, the intensity of the cross-link interference caused by the uplink signal of the second terminal to the downlink transmission may be large. Therefore, the reception performance of the downlink signal at the first terminal may deteriorate. If the first terminal does not have the ability to eliminate cross-link interference, the reception performance of the downlink signal at the first terminal may seriously deteriorate.

[0098] In order to solve the cross-link interference problem between the above-mentioned terminals, in in-band full-duplex communication, uplink signals and downlink signals can be transmitted in different resource areas (e.g., time and / or frequency resource areas). For example, uplink signals and downlink signals transmitted in the same frequency band (e.g., the same carrier) can be transmitted in different time resource areas. Alternatively, uplink signals and downlink signals transmitted in the same frequency band (e.g., the same carrier) can be transmitted simultaneously (e.g., at the same time), and in this case, uplink signals and downlink signals can be transmitted in different frequency areas.

[0099] Figure 4 is a conceptual diagram illustrating a first exemplary embodiment of a method for multiplexing an uplink signal and a downlink signal in full-duplex communication.

[0100] See also Figure 4 , within a serving cell (or carrier), uplink signals and downlink signals may be multiplexed and transmitted in different resources (e.g., time and / or frequency resources). For example, a first downlink signal, a second downlink signal (or a first uplink signal), and a second uplink signal may be transmitted in different time resources. In other words, the first downlink signal, the second downlink signal (or a first uplink signal), and the second uplink signal may be transmitted based on a time division multiplexing (TDM) scheme. For another example, the first uplink signal and the second downlink signal may be transmitted in the same time resource and different frequency resources. In other words, the first uplink signal and the second downlink signal may be transmitted based on a frequency division multiplexing (FDM) scheme. In the present disclosure, a downlink signal may be referred to as a DL signal, and an uplink signal may be referred to as a UL signal.

[0101] The base station can transmit and receive uplink signals and downlink signals. For example, the base station can transmit a second downlink signal to a terminal (e.g., a first terminal) while receiving a first uplink signal from another terminal (e.g., a second terminal). The second downlink signal can act as self-interference (e.g., cross-link interference) during the base station's reception of the first uplink signal. The first uplink signal can act as cross-link interference during the first terminal's reception of the second downlink signal. According to an exemplary embodiment of the present disclosure, the frequency region for transmitting the first uplink signal and the frequency region for transmitting the second downlink signal can be separated from each other, and when the frequency regions are far enough apart, the above-mentioned cross-link interference can be mitigated. Figure 4 In an exemplary embodiment of Figure 3 In the present disclosure, a time period during which uplink and downlink signals are allowed to be transmitted simultaneously may be referred to as a sub-band full-duplex (SBFD) period.

[0102] In the present disclosure, a method for in-band full-duplex communication will be described. In the present disclosure, single carrier transmission will be mainly considered, but the proposed method is not limited to single carrier transmission and can be easily applied to transmission using carrier aggregation. In the present disclosure, unless otherwise specified, uplink transmission and downlink transmission can be transmitted in the same bandwidth part, or can be transmitted in different bandwidth parts (e.g., uplink bandwidth part and downlink bandwidth part). The bandwidth part can be a bandwidth part configured for the same service cell or the same carrier. When carrier aggregation is used, the bandwidth parts can belong to different carriers (or service cells). In addition, although TDD systems will be mainly considered in the present disclosure, the proposed method can be easily applied to systems using other duplex schemes (e.g., FDD systems).

[0103] Method for configuring resource areas during SBFD period

[0104] The following will introduce a method for configuring a resource area for uplink transmission and downlink transmission in a terminal of full-duplex communication. Here, uplink transmission may refer to the transmission of uplink physical signals and / or channels. Uplink physical signals and / or channels may include PUSCH, PUCCH, DM-RS, SRS, PRACH, phase tracking reference signal (PT-RS), etc. Here, downlink transmission may refer to the transmission of downlink physical signals and / or channels. Downlink physical signals and / or channels may include PDSCH, PDCCH, DM-RS, CSI-RS, tracking reference signal (TRS), PT-RS, positioning reference signal (PRS), synchronization signal (e.g., primary synchronization signal (PSS), secondary synchronization signal (SSS)), PBCH, synchronization signal block (SSB), SS / PBCH block, discovery signal, etc.

[0105] According to an exemplary embodiment, the SBFD period may not be explicitly configured for the terminal. In this case, the base station may appropriately allocate uplink signals and downlink signals in the frequency domain, and simultaneously perform uplink / downlink transmissions in the SBFD period. Figure 4 In an exemplary embodiment of the present invention, the SBFD period can be configured to the first terminal as a complete downlink period, and the first terminal can receive the second downlink signal during the downlink period. The SBFD period can be configured to the second terminal as a complete uplink period, and the second terminal can transmit the first uplink signal during the uplink period. According to the above method, full-duplex communication can be performed during the SBFD period. According to the above method, the second terminal cannot apply the transmission bandpass filter that takes into account the downlink reception at the first terminal, and cannot effectively control the cross-link interference between the terminals. In order to solve the above problems, the frequency gap between the uplink transmission and the downlink transmission will be greatly increased, in which case the spectrum efficiency will be reduced.

[0106] Therefore, it may be preferable to explicitly configure the SBFD period to the terminal. 'Configuring the first time period as the SBFD period in the terminal' may mean 'transmitting configuration information for distinguishing the uplink subband and the downlink subband in the first time period to the terminal'. A specific method for configuring the SBFD period in the terminal will be described below. In the following exemplary embodiments, the case of configuring at most one uplink subband to the terminal will be mainly considered, but the same or similar method may be used to configure multiple uplink subbands to the terminal in the SBFD period.

[0107] Figure 5 is a conceptual diagram illustrating a first exemplary embodiment of a method of configuring resources in a SBFD period.

[0108] See also Figure 5The terminal may receive time slot format configuration information (e.g., time slot format configuration, time slot format information) from the base station through the above method, and determine the downlink period, flexible period, and / or uplink period based on the time slot format configuration information. Each of the downlink period, the flexible period, and the uplink period may be a group of consecutive symbols. In the present disclosure, the downlink period may be referred to as the DL period, the flexible period may be referred to as the FL period, and the uplink period may be referred to as the UL period.

[0109] The terminal may receive uplink subband configuration information (e.g., uplink subband configuration, uplink subband information) from the base station. The uplink subband configuration information may include time resource configuration information (e.g., time resource information) and / or frequency resource configuration information (e.g., frequency resource information). The terminal may determine the resources of the uplink subband based on the time slot format information and / or the uplink subband information. If the resources of the uplink subband (e.g., uplink resources) overlap with the downlink resources and / or flexible resources according to the time slot format configuration, the downlink resources and / or flexible link resources may be covered by the resources of the uplink subband, and the covered resources may be regarded as uplink resources. In other words, if the transmission direction of the time slot format configuration and the transmission direction of the uplink subband configuration conflict in the same resource, the transmission direction of the uplink subband configuration may have a higher priority than the transmission direction of the time slot format configuration. The method applied in the above example may be referred to as "method 100".

[0110] In the method 100, the frequency resources of the uplink subband may correspond to an RB set. The RB set may be configured in a carrier bandwidth or a bandwidth portion and may contain contiguous RBs (e.g., PRBs). The guard band may be arranged at the boundary of the RB set (e.g., the lower frequency boundary and / or the upper frequency boundary). The guard band may be configured in a carrier bandwidth or a bandwidth portion and may contain contiguous RBs (e.g., PRBs).

[0111] The base station can inform the terminal of the frequency position of the RB set (e.g., 'the starting RB and the number of RBs' or 'the starting RB and the ending RB'), and the terminal can identify the frequency position of the RB set and / or the guard band based on the frequency position information. Alternatively, the base station can inform the terminal of the frequency position of the guard band (e.g., 'the starting RB and the number of RBs of each guard band' or 'the starting RB and the ending RB of each guard band'), and the terminal can identify the frequency position of the RB set and / or the guard band based on the frequency position information. The terminal can regard the RB set as the frequency resource of the uplink subband. A certain guard band can be configured to contain 0 RBs. In this case, the terminal can assume that the guard band does not exist.

[0112] The time period during which the guard band is valid may be consistent with the duration (e.g., time length) of the uplink subband corresponding to the guard band. Alternatively, the guard band may be valid only for a portion of the duration of the uplink subband corresponding to the guard band (e.g., a period during which a transmission direction conflict occurs between the subband configuration and the time slot format configuration, an SBFD period, etc.). Basically, the terminal may not transmit a signal in the guard band. The terminal may apply subband filtering to the uplink signal based on the guard band or the subband bandwidth determined by the guard band (e.g., the bandwidth of the uplink subband), and transmit the filtered uplink signal. The terminal may not receive a signal in the guard band.

[0113] The time resource (e.g., duration) of the uplink subband may correspond to a set of time slots and / or symbols. The terminal may receive information about the position (e.g., index) of the time slots and / or symbols corresponding to the duration of the uplink subband from the base station. The terminal may regard the resources corresponding to the intersection of the RB set and the duration of the uplink subband as an uplink subband or an uplink resource.

[0114] The time resources of the uplink subband can be arranged in the downlink period. Figure 5 , the first uplink subband may be arranged in a downlink period. The entire duration of the first uplink subband may correspond to a SBFD period. According to the above-mentioned priority rule, during the duration of the first uplink subband, the terminal may regard the frequency resources of the first uplink subband as uplink resources rather than downlink resources. The terminal may regard the remaining frequency resources (e.g., the remaining frequency resources in the carrier or bandwidth part, D1 and D2) except the frequency resources of the first uplink subband (or the first uplink subband and the guard band) during the duration of the first uplink subband as downlink resources. D1 and D2 may be referred to as downlink subbands. Therefore, the SBFD period in which the first uplink subband is arranged may have a subband mode 'DUD'.

[0115] The time resources of the uplink subband may be arranged in the flexible period and / or the uplink period. Figure 5, the second uplink subband may be arranged in a flexible period and an uplink period. In this case, a portion of the duration of the second uplink subband (e.g., a period overlapping with the flexible period) may correspond to a SBFD period. According to the above-mentioned priority rule, the terminal may regard the frequency resources of the second uplink subband as uplink resources rather than flexible resources during the SBFD period. During the SBFD period, the terminal may regard the remaining frequency resources (e.g., the remaining frequency resources in the carrier or bandwidth part, F1 and F2) other than the frequency resources of the second uplink subband (or the second uplink subband and the guard band) as flexible resources. F1 and F2 may be referred to as flexible subbands. Therefore, the SBFD period may have a subband mode 'FUF'. The terminal may receive scheduling information (e.g., dynamic scheduling information) of uplink signals and / or downlink signals in flexible resources or flexible subbands. Through the above-mentioned method, the base station may dynamically control whether to apply a full-duplex period, whether to perform full-duplex operation, etc. In other words, dynamic SBFD operation may be performed.

[0116] Reference again Figure 5 , another part of the duration of the second uplink subband (e.g., a period overlapping with the uplink period) can be regarded as an uplink period. When the uplink subband is configured in an uplink symbol, the terminal can regard the uplink symbol as a complete uplink symbol and can perform uplink transmission operations in the entire operating frequency region of the uplink symbol (e.g., an uplink bandwidth part or an uplink carrier). For example, the uplink subband may not be applied to the uplink symbol or be ignored.

[0117] Alternatively, the uplink subband may be valid in the uplink symbol. In the above exemplary embodiment, the uplink period in which the second uplink subband is configured may be regarded as having the subband mode 'UUU'. In this case, the guard band in the uplink period to which the second uplink subband is allocated may be regarded as an uplink resource. In other words, if the transmission directions of the two subbands adjacent to the guard band are both uplink, the guard band may be regarded as an uplink resource.

[0118] The above operations (e.g., operations of treating resources as uplink resources, downlink resources, or flexible resources) may also be performed at the base station. In other words, in the present disclosure, the base station may perform operations corresponding to operations of treating resources as uplink resources, downlink resources, or flexible resources by the terminal.

[0119] In the above exemplary embodiments, the frequency resources (e.g., RB set) of the first uplink subband and the frequency resources (e.g., RB set) of the second uplink subband may be the same. In other words, in "method 100", for one carrier or one bandwidth part, the terminal may uniquely determine the RB set corresponding to the uplink subband based on the RB set configuration information and / or the guard band configuration information received from the base station, and determine the frequency region of the uplink subband in all SBFD periods as the RB set. In other words, the frequency position of the uplink subband may be time-invariant until the terminal receives separate valid configuration information.

[0120] The uplink subband may be repeated periodically. The period of the uplink subband may have a specific relationship with the period of the time slot format. For example, the period of the uplink subband may match the period of the time slot format. For another example, the period of the uplink subband may be a divisor or multiple of the period of the time slot format. In addition, the period of the uplink subband may be a divisor or multiple of 20ms. The period may refer to a repetition period. The period of the uplink subband may be signaled to the terminal in an explicit manner. Additionally or alternatively, the terminal may determine the period of the uplink subband based on the period of the time slot format according to the above relationship. The time slot format may refer to a time slot format semi-statically configured to the terminal.

[0121] Meanwhile, the period of the time slot format may consist of the sum of two sub-periods (e.g., a first sub-period and a second sub-period). For example, the first sub-period may correspond to a time period of N1 consecutive time slots or P1 ms, and the second sub-period may correspond to a time period of N2 consecutive time slots or P2 ms after the first sub-period. Thus, the entire period of the time slot format may consist of a time period of (N1+N2) consecutive time slots or (P1+P2) ms. Each of N1, N2, P1, and P2 may be a natural number.

[0122] In the above case, the period of the uplink subband may also be composed of the sum of two sub-periods (e.g., the third sub-period and the fourth sub-period). For example, the third sub-period may correspond to a time period of N3 consecutive time slots or P3 ms, and the fourth sub-period may correspond to a time period of N4 consecutive time slots or P4 ms after the third sub-period. Therefore, the entire period of the uplink subband may be composed of a time period of (N3+N4) consecutive time slots or (P3+P4) ms. Each of N3, N4, P3 and P4 may be a natural number.

[0123] For example, the third sub-period and the fourth sub-period may be consistent with the first sub-period and the second sub-period, respectively. In other words, N3=N1 and N4=N2, or P3=P1 and P4=P2. For another example, the third sub-period and the fourth sub-period may be divisors or multiples of the first sub-period and the second sub-period, respectively. Alternatively, the sum of the third sub-period and the fourth sub-period may be a divisor or multiple of the sum of the first sub-period and the second sub-period. In addition, the sum of the third sub-period and the fourth sub-period may be a divisor or multiple of 20ms. The third sub-period and the fourth sub-period may transmit signals to the terminal in an explicit manner. Additionally or alternatively, the terminal may determine the third sub-period and the fourth sub-period based on the period and sub-period of the time slot format according to the above relationship.

[0124] As another method different from the above method, even if the period of the time slot format is composed of the sum of two sub-periods (e.g., the first sub-period and the second sub-period), the period of the uplink subband can also be defined by a period value. In this case, the period of the uplink subband can be determined independently of the period of the time slot format. Alternatively, the period of the uplink subband can have a specific relationship with the first sub-period and the second sub-period of the time slot format. For example, the period of the uplink subband can be consistent with the sum of the first sub-period and the second sub-period. For another example, the period of the uplink subband can be a divisor or multiple of the sum of the first sub-period and the second sub-period.

[0125] In a single cycle of the uplink subband, the number of transitions (or switches) from the SBFD period to the non-SBFD period and the number of transitions (or maximum number of transitions) from the non-SBFD period to the SBFD period may be limited to T times. For example, T may be a natural number (or even number) defined in the technical specification. T may be defined as the sum of T1 and T2, and T1 and T2 may represent the number of transitions (or maximum number of transitions) from the SBFD period to the non-SBFD period and the number of transitions (or maximum number of transitions) from the non-SBFD period to the SBFD period, respectively. In an exemplary embodiment, T may be 2. In addition, T1 and T2 may be 1. The above operation may correspond to allowing one transition from a downlink period to an uplink period within a period of the time slot format. In other words, the time slot format may include one downlink period, one flexible period, and one uplink period, in sequence, within a single period.

[0126] When the period of the slot format is composed of the sum of two sub-periods (e.g., the first sub-period and the second sub-period), the conversion operation from the downlink period to the uplink period can be performed once in each sub-period. In other words, the slot format can include a downlink period, a flexible period, and an uplink period in each sub-period. Therefore, for the entire period of the slot format, the conversion operation from the downlink period to the uplink period can be performed twice, and the conversion operation from the uplink period to the downlink period can also be performed twice. At the same time, as described above, the flexible symbols in the cell-specific slot format can be overwritten as downlink symbols or uplink symbols by UE-specific configuration. In this case, the conversion operation from the downlink period to the uplink period can be performed at most once in each slot.

[0127] Considering the above operations, within a single cycle of the uplink subband, operations where the number of transitions from the SBFD period to the non-SBFD period and the number of transitions from the non-SBFD period to the SBFD period exceed two times may be allowed. In other words, T>2 and T1=T2>1. Considering the complexity and delay time of the SBFD period transition operation, a method of limiting T=4 and T1=T2=2 for each cycle of the uplink subband may be adopted. Alternatively, the cycle of the uplink subband may be composed of the sum of S sub-periods, and within each sub-period, the transition from the SBFD period to the non-SBFD period and the transition from the non-SBFD period to the SBFD period may be allowed once, respectively. In other words, for the entire cycle of the uplink subband, T=2S and T1=T2=S.

[0128] According to the above method, the period of the uplink subband may be longer than the period or subperiod of the time slot format. In this case, the duration of an uplink subband may be limited to be arranged within a time slot format period or a time slot format subperiod. In this case, the duration of an uplink subband may overlap with at most one downlink period and at most one flexible period. Alternatively, a method may be considered that allows the duration of an uplink subband to be arranged over multiple time slot format periods or multiple time slot format subperiods. In this case, the duration of an uplink subband may overlap with multiple downlink periods. In addition, the duration of an uplink subband may overlap with multiple flexible periods. The terminal may form an SBFD period in each overlapping period according to the above method or the method described later. The above operations related to the period of the uplink subband and the switching between the SBFD period and the non-SBFD period may also be applied to the exemplary embodiments to be described later.

[0129] According to the above exemplary embodiments, a terminal performing SBFD operation can share the same time slot format configuration with a terminal (e.g., a conventional terminal) that does not perform SBFD operation. The base station can transmit a broadcast message (e.g., SIB, SIB1) including common time slot format information to the terminal. In this case, the signaling overhead for resource configuration of the terminal can be reduced.

[0130] Figure 6 is a conceptual diagram illustrating a second exemplary embodiment of a method for configuring resources in a SBFD period.

[0131] See also Figure 6 , the terminal may receive time slot format configuration information (e.g., time slot format configuration, time slot format information) from the base station, and determine a downlink period, a flexible period, and / or an uplink period based on the time slot format configuration information. The time slot format information may include information about the SBFD period, and the terminal may determine the SBFD period based on the time slot format information. In other words, the terminal may determine a downlink period, a flexible period, an uplink period, and / or a SBFD period based on the time slot format information. The SBFD period may represent a period in which an uplink subband is allocated, a period in which an uplink subband coexists with a downlink subband or a flexible subband, and the like.

[0132] The SBFD period may be a group of continuous symbols. The SBFD period may be distinguished from the downlink period, the flexible period, and / or the uplink period, and may not overlap with the downlink period, the flexible period, and / or the uplink period in time. The terminal may determine the frequency resources of the uplink subband and / or the guard band corresponding to the uplink subband based on the above signaling method. The method applied in the above exemplary embodiment may be referred to as "method 110".

[0133] SBFD periods can be explicitly configured for terminals. Figure 6 , the terminal may determine the first SBFD period and the second SBFD period according to the time slot format information. For example, the configuration information of the first SBFD period may include information indicating the downlink transmission direction, and the configuration information of the second SBFD period may include information indicating the flexible transmission direction. Based on the configuration information, the terminal may regard the first SBFD period as a period in which the uplink subband and the downlink subband coexist. For example, the terminal may regard the remaining frequency regions (e.g., D1 and D2) in the first SBFD period except the uplink subband and / or the guard band as the downlink region.

[0134] The terminal may regard the second SBFD period as a period in which the uplink subband and the flexible subband coexist. For example, the terminal may regard the remaining frequency regions (e.g., F1 and F2) in the second SBFD period except the uplink subband and / or the guard band as flexible regions. Alternatively, the SBFD period may be configured to the terminal in the form of a "modified downlink period" or a "modified flexible period". For example, the first SBFD period may be configured as a downlink period including an uplink subband, a downlink period for SBFD operation, etc., and the second SBFD period may be configured as a flexible period including an uplink subband, a flexible period for SBFD operation, etc.

[0135] In the "method 110", the number of transitions (or switches) from the SBFD period to the non-SBFD period and the number of transitions (or maximum number) from the non-SBFD period to the SBFD period may be defined for each time slot format cycle or each time slot format sub-cycle. For example, in each time slot format cycle, T=2 and / or T1=T2=1. Alternatively, in each time slot format sub-cycle, T=2 and / or T1=T2=1. In the latter case, one SBFD period may be arranged for each time slot format sub-cycle. The base station may appropriately configure the time slot format including the SBFD period so as not to exceed the number of transitions defined above.

[0136] The "method 110" may be applicable only to a cell-specific time slot format configuration. Alternatively, the "method 110" may be applied not only to a cell-specific time slot format configuration, but also to a terminal-specific time slot format configuration. In a time slot format specifically configured for a terminal, a certain time slot may be configured as a time slot that includes only SBFD symbols. In addition, a certain time slot may be configured as a time slot that includes both SBFD symbols and non-SBFD symbols (e.g., downlink symbols, flexible symbols, and / or uplink symbols).

[0137] In another method different from the above method, the base station may configure multiple subbands (eg, multiple RB sets) to the terminal and configure a time slot format for each subband (eg, each RB set). This method will be described below.

[0138] Figure 7 is a conceptual diagram illustrating a third exemplary embodiment of a method of configuring resources within a SBFD period.

[0139] See also Figure 7, the terminal may receive configuration information from the base station and determine the frequency positions of multiple RB sets (e.g., the first RB set, the second RB set, and the third RB set) based on the configuration information. The terminal may determine the frequency position of the guard band (e.g., the first guard band and the second guard band) located between the RB sets based on the configuration information. The configuration information may include information about the frequency position of the RB set and / or information about the frequency position of the guard band.

[0140] The terminal may receive slot format configuration information (e.g., slot format information, slot format configuration) for each configured RB set from the base station. The slot format configuration of each RB set may be independent between RB sets. In other words, the positions of the slot formats (e.g., downlink period, flexible period, and uplink period) configured for each RB set are not necessarily aligned between RB sets. The positions of the slot formats (e.g., downlink period, flexible period, and uplink period) configured for each RB set may be different. The method applied in the above exemplary embodiment may be referred to as "method 120".

[0141] See also Figure 7 , the time slot format of the first RB set and the time slot format of the third RB set may be consistent with each other. On the other hand, the time slot format of the first RB set may be different from the time slot format of the second RB set. For example, the downlink period of the first RB set may correspond to the downlink period, flexible period and uplink period of the second RB set. The uplink period of the second RB set may correspond to the downlink period, flexible period and uplink period of the first RB set. Time periods with different transmission directions may overlap in time in the RB set, and the overlapping time periods may form an SBFD period. In other words, the first time period may form an SBFD period with a subband mode of 'DUD', and the second time period may form an SBFD period with a subband mode of 'FUF'. Therefore, SBFD communication can be performed between the base station and the terminal.

[0142] According to "Method 120", the base station can freely arrange SBFD periods with various subband modes in the time domain. For example, the base station can configure an SBFD period with mode 'DUF' (e.g., subband mode 'DUF') for the terminal. In the SBFD period with mode 'DUF', the downlink subband can be allocated to the first RB set, the uplink subband can be allocated to the second RB set, and the flexible subband can be allocated to the third RB set. The above operation may be difficult to perform by "Method 100" or "Method 110".

[0143] Meanwhile, in the above exemplary embodiment, a guard band may be configured between RB sets. Basically, the terminal may not perform signal transmission or reception operations in the guard band. When using "method 120", there may be a time period when a guard band is not required. For example, since all RB sets adjacent to each guard band are downlink resources, Figure 7 The periods G1 and G2 shown in FIG. 1 can be used for downlink transmission and downlink measurement. For example, since all RB sets adjacent to each guard band are uplink resources, Figure 7 The time periods G3 and G4 shown in can be used for uplink transmission and uplink measurement (for example, measuring uplink signals transmitted from other terminals, cross-link interference measurement). When the guard band in a certain time period and the RB set adjacent to the guard band have the same transmission direction (for example, all downlink, all uplink or all flexible), the terminal can regard the guard band as a resource with the same transmission direction in the time period. In other words, during the above time period, the guard band cannot be used for the purpose of the guard band. That is, in symbols where the entire range of the frequency region (for example, all RBs in the carrier, all RBs in the bandwidth part, all RBs in the active bandwidth part) are configured or indicated as having the same transmission direction, the guard band can be regarded as a resource with the same transmission direction. The guard band configuration information can be ignored in the symbol.

[0144] According to the above exemplary embodiments, the SBFD period may have not only the subband mode 'DUD', the subband mode 'DU' and the subband mode 'UD', but also the subband mode 'FUF', the subband mode 'FU' and the subband mode 'UF'. When the SBFD period having the subband mode 'FUF', the subband mode 'FU', the subband mode 'UF', etc. is configured for the terminal, the terminal may utilize the uplink subband for a long time to transmit the uplink control channel (such as the periodically transmitted PUCCH, etc.), thereby expanding the coverage of the uplink control channel, and may utilize the flexible subband for dynamic TDD operation at the same time.

[0145] In the SBFD period formed by the above-mentioned embodiment, the terminal can perform a downlink reception operation and an uplink transmission operation, and the base station can perform a downlink transmission operation and an uplink reception operation. The uplink subband can be configured in a downlink symbol, and the downlink symbol configured with the uplink subband can form an SBFD period (hereinafter referred to as a 'first SBFD period'). The uplink subband can be configured in a flexible symbol, and the flexible symbol configured with the uplink subband can form an SBFD period (hereinafter referred to as a 'second SBFD period').

[0146] An uplink subband may be configured in an uplink symbol, an uplink symbol configured with an uplink subband may include only uplink resources, and an uplink symbol configured with an uplink subband may be considered as an uplink symbol. When a guard band is configured in an uplink symbol, the guard band may be considered as an uplink resource. Alternatively, the guard band configured in the uplink symbol may be ignored. In the guard band, the terminal may perform an uplink transmission operation. See Figure 7 , the terminal and / or the base station may regard the regions G3 and G4 as uplink resources, and may regard the symbols including the regions G3 and G4 as full uplink symbols. Uplink signals may be transmitted in the regions G3 and G4.

[0147] In the first SBFD period and the second SBFD period, the terminal may perform an uplink signal transmission operation in the uplink subband. The terminal may not perform a downlink signal reception operation in the uplink subband. The signal transmission operation in the uplink subband may be performed in a frequency region included in a bandwidth portion (e.g., an uplink bandwidth portion) activated in the terminal. The terminal may perform a downlink signal reception operation in a frequency region (e.g., a downlink subband) other than the uplink subband and / or the guard band in the first SBFD period.

[0148] The terminal may not perform an uplink signal transmission operation in a downlink subband. The signal reception operation in the downlink subband may be performed within a frequency region included in a bandwidth portion (e.g., a downlink bandwidth portion) activated in the terminal. The terminal may perform a downlink signal reception operation in a frequency region (e.g., a flexible subband) other than an uplink subband and / or a guard band in the second SBFD period. The terminal may perform an uplink signal transmission operation in a flexible subband. When a downlink signal reception operation and an uplink signal transmission operation are indicated in the same symbol, the terminal may perform only one operation in the symbol according to a priority rule. The signal transmission or reception operation in the flexible subband may be performed within a frequency region included in a bandwidth portion (e.g., a downlink bandwidth portion or an uplink bandwidth portion) activated in the terminal.

[0149] When using "method 100" and "method 110", the uplink resources of the uplink subband (e.g., the first symbol of the uplink subband) may be adjacent to the downlink resources immediately before the time period to which the uplink subband is allocated (e.g., the last symbol of the downlink time period). In the above exemplary embodiment, the symbol immediately before the first uplink subband may be a downlink symbol. Therefore, the downlink symbol may be followed by an uplink symbol without a flexible symbol. Since the terminal needs switching time to switch from downlink operation to uplink operation, the signal reception operation in the downlink symbol and the signal transmission operation in the uplink symbol (e.g., the uplink symbol after the downlink symbol) are indicated to the terminal, and the terminal may not be able to correctly perform the reception operation or the transmission operation.

[0150] As a method of solving the above-mentioned problem, a guard period or a guard time may be arranged between the downlink period and the SBFD period.

[0151] Fig. 8A is a conceptual diagram showing a first exemplary embodiment of a method of arranging a guard period between a downlink period and an SBFD period, Figure 8B is a conceptual diagram showing a second exemplary embodiment of a method of arranging a guard period between a downlink period and an SBFD period.

[0152] refer to Fig. 8A and Figure 8B By applying the method of the above embodiment, the first uplink subband can be configured in the terminal, and the period of configuring the first uplink subband can form an SBFD period together with the downlink subband or the flexible subband. Here, a guard period can be set between the downlink period and the SBFD period.

[0153] according to Fig. 8A In a first exemplary embodiment, a guard period may be arranged in a starting period of a first uplink subband. The guard period may include at least one symbol. For example, in a frequency region to which an uplink subband is allocated, at least the first symbol of the uplink subband may be designated as a guard period. When a guard band is configured, the guard period may also be applied to the guard band. The symbols forming the guard period may be referred to as guard symbols. In the guard symbols of the uplink subband, uplink signal transmission or downlink signal reception may not be scheduled to the terminal. The terminal may not perform a signal transmission operation or a signal reception operation in the guard symbols of the uplink subband. Due to a propagation delay of a downlink signal or an uplink timing advance (TA) indication, a downlink signal or an uplink signal may actually be transmitted even in a portion of the guard period. The terminal may transmit or receive a signal in a frequency region other than the uplink subband of the guard symbol. See Fig. 8A, the frequency region outside the uplink subband of the guard symbol can be configured as a downlink subband, and the terminal can receive or measure a downlink signal or an uplink signal transmitted by another terminal in the downlink subband. The downlink subband can be mapped to a downlink bandwidth part, and the terminal can regard the downlink bandwidth part as activated during the guard period.

[0154] according to Figure 8B In a second exemplary embodiment of the present invention, a guard period may be arranged between a downlink period and an SBFD period formed by a first uplink subband. The guard period may include at least one symbol. The guard period may be applied to the entire operating frequency region (e.g., bandwidth portion, carrier) of the guard symbol. The guard period may be interpreted as a portion of a downlink period or a flexible period. Alternatively, the guard symbol may be interpreted as a symbol type different from a downlink symbol, a flexible symbol, and an uplink symbol. The terminal may consider that no bandwidth portion is activated in the guard period or the guard symbol.

[0155] The length of the guard period (e.g., the number of symbols corresponding to the guard period) may be predefined in the technical specification. For example, the guard period may include only the first symbol of the uplink subband. Alternatively, the length of the guard period (e.g., the number of symbols corresponding to the guard period) may be set by the base station to the terminal. Information about the length of the guard period may be transmitted to the terminal together with the configuration information of the uplink subband. Alternatively, information about the length of the guard period may be included in the configuration information of the uplink subband, and the configuration information of the uplink subband may be transmitted to the terminal.

[0156] The above-mentioned guard period can be configured to the terminal in the form of a flexible period. In other words, the starting part of the uplink subband (for example, a group of continuous symbols including at least the first symbol) can be configured as a flexible symbol. Alternatively, the end part of the downlink period (for example, a group of continuous symbols including at least the last symbol) can be configured as a flexible symbol. Unlike using conventional flexible symbols, in the flexible period configured by the above method, uplink signal transmission or downlink signal reception may not be scheduled to the terminal. The terminal may not perform a signal transmission operation or a signal reception operation in a flexible symbol.

[0157] Even when a guard period or a flexible period is configured in an uplink subband, the guard band adjacent to the uplink subband is still valid even in the guard period or the flexible period and can be used to control cross-link interference. In other words, the terminal cannot transmit or receive signals in the guard band during the guard period or the flexible period.

[0158] The above problem may occur even if the immediately preceding symbol of the uplink subband is a flexible symbol. The terminal may receive information indicating the reception of a downlink signal in the flexible symbol, and may receive information indicating the transmission of an uplink signal in the first symbol of the uplink subband. When timing advance is applied to the uplink transmission of the terminal, the reception time of the downlink signal and the transmission time of the uplink signal may overlap, and it may be difficult for the terminal to perform both the reception operation of the downlink signal and the transmission operation of the uplink signal. Therefore, the signal conflict problem in the process of converting from the flexible period to the SBFD period may be the same as the signal conflict problem in the process of converting from the downlink period to the SBFD period. Similarly, a guard period may be arranged between the flexible period and the SBFD period, and the method applied to the above exemplary embodiment may also be applied. In addition, the above method may also be applied in the same manner even if the immediately preceding symbol of the uplink subband is an uplink symbol.

[0159] Generally, the above method can be used to ensure a predetermined time gap between a non-SBFD period and a SBFD period to assist in the operation of switching from a non-SBFD period to a SBFD period. In addition, when switching from a SBFD period to a non-SBFD period, a protection period can be arranged between the SBFD period and the non-SBFD period. The non-SBFD period can be a downlink period, a flexible period, or an uplink period. The antenna panel, subband filter, sampling rate, etc. of the base station may be different between the SBFD period and the non-SBFD period, and the base station can use the time gap ensured by the above method to easily perform operations such as antenna panel switching, subband filter tuning, and sampling rate adjustment when switching from a SBFD period to a non-SBFD period or from a non-SBFD period to a SBFD period.

[0160] As another method to solve the conflict problem between downlink transmission and uplink transmission, in the period when there is no flexible symbol between the downlink symbol and the uplink symbol and the downlink symbol is directly converted to the uplink symbol, a method in which the base station avoids the conflict between the downlink transmission and the uplink transmission through appropriate scheduling can be adopted. For example, the terminal may expect not to receive the scheduling of the uplink signal in at least the first N1 symbols of the uplink subband in the uplink subband. The terminal may expect not to receive the scheduling of the downlink signal of the N2 symbols immediately before the uplink subband in the frequency domain of the uplink subband. The above two operations can be performed independently. Or, the above two operations can be performed in combination. That is, the terminal may expect not to receive the scheduling of the uplink signal in the first N1 symbols of the uplink subband and the scheduling of the downlink signal in the N2 symbols immediately before the uplink subband in the frequency region corresponding to the uplink subband. Each of N1 and N2 can be a natural number. For example, N1 can be 1 and N2 can be 1.

[0161] At the same time, the base station can transmit SSB for initial access of the terminal, beam management, radio resource measurement (RRM) / radio link monitoring (RLM), etc. When beam scanning is required to expand the cell coverage of the high frequency band, the base station can repeatedly transmit SSB in multiple SSB resources by using multiple beams. SSB may include synchronization signals PSS, SSS, etc. SSB may include PBCH and DM-RS for decoding PBCH. SSB may include other downlink signals (e.g., CSI-RS) that facilitate initial access. In the NR communication system, SSB may be referred to as "SS / PBCH block".

[0162] The base station may transmit a PDCCH in a type 0 PDCCH CSS set for initial access of a terminal. The PDCCH may include a DCI, and the DCI may be a DCI for scheduling a PDSCH including system information (e.g., SIB, SIB1). The PDCCH may be a PDCCH with a CRC scrambled with a specific RNTI (e.g., SI-RNTI). The DCI may have a specific DCI format (e.g., DCI format 1_0). Similar to the SSB, the base station may repeatedly transmit the PDCCH in multiple resources of the type 0 PDCCH CSS set by using multiple beams to extend the signal arrival distance. The resources of the type 0 PDCCH CSS set may correspond to CORESET 0. The type 0 PDCCH (or the PDCCH DM-RS corresponding to the type 0 PDCCH) may have a QCL relationship with the SSB, and the terminal may receive the PDCCH in the type 0 PDCCH CSS set associated with the SSB based on the receive beam of the SSB.

[0163] The base station may periodically transmit SSBs and / or type 0 PDCCHs. Therefore, SSBs and type 0 PDCCH CSS sets (or CORESETs corresponding to type 0 PDCCH CSS sets (e.g., CORESET 0)) may not overlap with uplink subbands. To support the above operations, uplink subbands (or RB sets and / or guard bands corresponding to uplink subbands) may be arranged in the remaining frequency region (e.g., the remaining RBs in a carrier or bandwidth part except the RBs of CORESET0) of a bandwidth that does not include resources of type 0 PDCCH sets (e.g., the bandwidth of CORESET 0 (e.g., the RBs constituting CORESET 0)). The uplink subbands (or RB sets and / or guard bands corresponding to uplink subbands) may be arranged in the remaining frequency region (e.g., the remaining RBs except the RBs in a carrier or bandwidth part except the RBs to which SSBs are mapped) of a bandwidth that does not include SSBs (e.g., the RBs to which SSBs are mapped).

[0164] In addition to SSB and type 0 PDCCH, signals that should be transmitted periodically can also be allocated to frequency regions other than uplink subbands. The terminal may not want the signal to overlap with the uplink subband. For example, TRS (or CSI-RS for tracking) can be transmitted to the terminal periodically for synchronization of the terminal, automatic gain control (AGC), derivation of channel characteristics, etc. Therefore, TRS can be allocated to frequency regions other than uplink subbands. The terminal may not want TRS to overlap with the uplink subband.

[0165] At the same time, taking into account SBFD communication, a base station with self-interference elimination capability can simultaneously perform SSB or type 0 PDCCH transmission operations and uplink signal reception operations through different subbands in the same time period. When multiple SSB resources are configured and there are type 0 PDCCH resources corresponding to multiple SSB resources, the terminal can receive SSB or type 0 PDCCH in some of the resources and not perform reception operations in the remaining resources. When the SSB is not actually received in a certain SSB resource, or the type 0 PDCCH is not actually received in a certain CSS set (or PDCCH monitoring opportunity), the terminal can transmit an uplink signal in the symbol to which the SSB resource or CSS set is mapped. For example, the terminal can transmit an uplink signal in the uplink subband of the symbol to which the SSB resource or CSS set is mapped.

[0166] For another example, the terminal may transmit an uplink signal in the entire frequency band of the symbol to which the SSB resource or CSS set is mapped. The entire frequency band may include a frequency region in which the SSB resource or CSS set (or the CORESET corresponding to the CSS set) is configured. Considering the operation of the base station and the terminal, the uplink subband may overlap with the symbol to which the SSB and the type 0 PDCCH CSS set are mapped. That is, the SSB and the type 0 PDCCH CSS set may be configured within the SBFD period. The symbol to which the SSB and the type 0 PDCCH CSS set are mapped may be configured as a SBFD symbol.

[0167] The resources in the SSB resources and type 0 PDCCH CSS set that meet the predetermined conditions can be configured as SBFD symbols. For example, the SSB resources or type 0 PDCCH CSS set mapped to the symbols on which the terminal actually performs reception or monitoring operations can be configured as SBFD symbols, and the SBFD symbols may include uplink subbands. The terminal can transmit uplink signals in SBFD symbols. The symbols mapped to the SSB resources and / or type 0 PDCCH CSS set that do not meet the predetermined conditions can be restricted to be configured as SBFD symbols. Alternatively, even when the symbols mapped to the SSB resources and / or type 0 PDCCH CSS set that do not meet the predetermined conditions are configured as SBFD symbols, the SBFD symbols can also be regarded as downlink symbols or flexible symbols. In other words, the SBFD symbol configuration can be ignored in the SBFD symbol.

[0168] In addition to receiving the SSB in the SBFD symbol, the terminal can also receive other downlink signals. Other downlink signals can be received in a PRB set including a PRB configured as an uplink subband. The method can be extended and applied to all SSBs and / or all types of 0PDCCH CSS sets configured in the terminal. Alternatively, the method can be applied to all SSBs actually transmitted by the base station in the SSB configured for the terminal and / or all types of 0PDCCH CSS sets actually used for transmission by the base station in the type 0PDCCH CSS set configured for the terminal.

[0169] In the above operation, the SSB may be a cell-defined SSB (CD-SSB) that defines a cell. Alternatively, the SSB may be a non-cell-defined SSB (NCD-SSB) that does not define a cell. The SSB may be configured to the terminal via the PBCH (or MIB) or a terminal-specific RRC signaling process. When multiple SSB resources (e.g., multiple SSBs) are arranged within a cycle, the terminal may be configured for each SSB or each SSB group whether to apply the above operation. Therefore, the uplink transmission of the terminal may be prohibited in the symbol transmitting a specific SSB or a specific SSB group, and the specific SSB or a specific SSB group may be protected from cross-link interference.

[0170] Resource allocation method for SBFD period

[0171] The base station may perform an uplink receiving operation and a downlink transmitting operation simultaneously in the SBFD period. The terminal may perform an uplink transmitting operation and a downlink receiving operation simultaneously in the SBFD period. The terminal may be a terminal with self-interference elimination capability. Alternatively, the terminal may not perform an uplink transmitting operation and a downlink receiving operation simultaneously in the SBFD period. In other words, the terminal may not perform an uplink transmitting operation and a downlink receiving operation in the same time period in the SBFD period. The terminal may be a terminal without self-interference elimination capability. The downlink receiving operation may include a measurement operation (e.g., RRM measurement, CSI measurement, beam quality measurement) based on the reception of a downlink signal. The signal transmission method of a terminal that does not perform transmitting and receiving operations simultaneously will be described below.

[0172] Fig. 9 is a conceptual diagram showing a first exemplary embodiment of a slot format configuration and a PDCCH monitoring resource configuration.

[0173] See also Fig. 9 , the terminal may receive time slot format configuration information and PDCCH monitoring resource configuration information from the base station. The time slot format may include the above-mentioned downlink period (or flexible period) and SBFD period. The PDCCH monitoring resource may include a first PDCCH resource set and a second PDCCH resource set. The first PDCCH resource set may be a PDCCH monitoring resource set (e.g., search space set, CORESET, PDCCH monitoring opportunity) configured to be suitable for a downlink period or a flexible period, and the second PDCCH resource set may be a PDCCH monitoring resource set (e.g., search space set, CORESET, PDCCH monitoring opportunity) configured to be suitable for a SBFD period. The second PDCCH resource set may be configured to be limited to a downlink subband or a flexible subband so as not to overlap with an uplink subband. In an exemplary embodiment, it may be assumed that the first PDCCH resource set and the second PDCCH resource set have the same repetition period (e.g., the period of the CORESET or search space set).

[0174] In an exemplary embodiment, when the repetition period of the slot format matches the repetition period of the PDCCH monitoring resource or when the repetition period of the slot format has a mutual inclusion relationship with the repetition period of the PDCCH monitoring resource, the PDCCH monitoring resource of the terminal can be arranged in a non-overlapping manner with the uplink subband in each cycle according to the intention of the base station, and the PDCCH monitoring operation of the terminal can be performed normally. The repetition period of the slot format and the repetition period of the PDCCH monitoring resource may not match each other. For example, the repetition period of the slot format and the repetition period of the PDCCH monitoring resource may not be aligned with each other.

[0175] In this case, a mismatch may occur between each time period of the time slot format and the PDCCH resource set corresponding to the time period. For example, contrary to the intention of the base station, in a certain time slot format period, the first PDCCH resource set may be arranged in the SBFD period instead of the downlink period or the flexible period, and in another time slot format period, the second PDCCH resource set may be arranged in the downlink period or the flexible period instead of the SBFD period. Therefore, the search space set may overlap with the uplink subband, and at least some of the PDCCH candidates belonging to the overlapping area may not be used for transmission. Although a time period in which broadband transmission can be performed is available, the CORESET may be configured in a narrowband, and as a result, the PDCCH reception performance may be degraded.

[0176] As a proposed method, multiple PDCCH resource sets may be configured in a terminal, and the PDCCH resource set monitored by the terminal may be switched based on a time slot format and / or an SBFD period (or an uplink subband period). Here, a PDCCH resource set may refer to a resource set on which a terminal performs PDCCH monitoring. A PDCCH resource set may refer to a PDCCH candidate set or a resource set to which a PDCCH candidate is mapped. The above method may be referred to as "method 200". "Method 200" will be described in detail below.

[0177] Fig.10 is a conceptual diagram showing a first exemplary embodiment of a PDCCH resource set switching method based on a slot format.

[0178] refer to Fig.10, the terminal may receive time slot format configuration information (e.g., time slot format configuration, time slot format information) from the base station. The time slot format may be repeated periodically, and may include a SBFD period and a non-SBFD period within one cycle of the time slot format. In the SBFD period, uplink subbands and / or guard bands may be arranged, and a subband pattern "DUD" may be formed. A non-SBFD period may refer to a period with a specific transmission direction (e.g., a continuous set of symbols). For example, a non-SBFD period may refer to a downlink period and / or a flexible period. An uplink period may not belong to a SBFD period or a non-SBFD period. According to an exemplary embodiment of the present disclosure, a non-SBFD period may include a set of continuous downlink symbols.

[0179] The terminal may receive configuration information of multiple PDCCH resource sets from a base station. For example, multiple PDCCH resource sets may be configured for the terminal. Multiple PDCCH resource sets may include at least a first PDCCH resource set and a second PDCCH resource set. The PDCCH resource set may include one or more search space sets, and the PDCCH resource set may be referred to as a search space set group (SSSG). The first PDCCH resource set (e.g., the first SSSG) may include a search space set #0. Search space set #0 (or a CORESET corresponding to search space set #0) may be arranged over the entire frequency band or bandwidth portion of the carrier. The second PDCCH resource set (e.g., the second SSSG) may include a search space set #1 and a search space set #2. Search space sets #1 and #2 may be arranged to be limited to downlink subbands to avoid overlapping with uplink subbands. In an exemplary embodiment of the present disclosure, search space sets #0, #1, and #2 may be associated with different CORESETs.

[0180] Each PDCCH resource set may be associated with a specific time period of the time slot format. According to an exemplary embodiment of the present disclosure, a first PDCCH resource set may be associated with a non-SBFD time period (e.g., a downlink time period), and a second PDCCH resource set may be associated with a SBFD time period. Based on this association, the terminal may monitor the first PDCCH resource set in a non-SBFD time period (e.g., a downlink time period) and monitor the second PDCCH resource set in a SBFD time period. In other words, the terminal may monitor the PDCCH resource set corresponding to each time period of the time slot format, and switch the PDCCH resource set according to the time when the time period of the time slot format is converted.

[0181] For example, when the slot format is converted from a non-SBFD period (e.g., a downlink period) to a SBFD period, the PDCCH monitoring resources of the terminal may be switched from the first PDCCH resource set to the second PDCCH resource set. Conversely, when the slot format is converted from the SBFD period to the non-SBFD period (e.g., a downlink period), the PDCCH monitoring resources of the terminal may be switched from the second PDCCH resource set to the first PDCCH resource set. The switching operation may be performed based on a time pattern (e.g., a semi-static slot format and / or a SBFD period (or an uplink subband period)) given to the terminal in advance rather than by immediate signaling from the base station.

[0182] The first PDCCH resource set and the second PDCCH resource set can be allocated on the same RB grid. For example, the first PDCCH resource set and the second PDCCH resource set can be allocated in the downlink bandwidth portion activated for the terminal (for example, a set of PRBs or a set of CRBs corresponding to the set of PRBs). The frequency region of the CORESET belonging to the first PDCCH resource set and the frequency region of the CORESET belonging to the second PDCCH resource set can both be configured based on the CRB grid, and the CRB grid is formed based on the same starting point. The starting point can be a reference frequency point (such as point A, the first CRB of the carrier, etc.). For example, each CRB grid can include 6 consecutive CRBs. Alternatively, the frequency region of the CORESET belonging to the first PDCCH resource set can be configured by the above method, and the frequency region of the CORESET belonging to the second PDCCH resource set can be configured based on the CRB grid formed in a specific RB set. For example, the frequency region of the CORESET belonging to the second PDCCH resource set may be configured based on a CRB grid formed by using a start CRB of an RB set or a CRB offset by N RBs from the start CRB of the RB set as a starting point.

[0183] As described above, configuration information for SBFD operation (e.g., time slot format information and / or uplink subband information) can be configured to the terminal in a cell-specific manner. Bandwidth parts (e.g., active bandwidth parts) can be configured in a terminal-specific manner. Certain bandwidth parts of the carrier bandwidth can be allocated to a certain terminal, and certain bandwidth parts can be activated. For example, in the above exemplary embodiments, the bandwidth part contained in the frequency region of the uplink subband (e.g., RB set) can be configured to the first terminal. The frequency region other than the uplink subband (e.g., RB set) and / or the guard band (e.g., the bandwidth part of the downlink subband) can be configured to the second terminal. The bandwidth part can include a downlink bandwidth part and / or an uplink bandwidth part. The bandwidth part can be activated.

[0184] The terminal may receive configuration information (such as time slot format information and / or uplink subband information) for SBFD operation from the base station by using the above method. No SBFD period may be formed in the bandwidth part configured (or activated) in the terminal. Figure 7 In the SBFD period shown, the bandwidth portion of the first terminal may include only uplink subbands. The bandwidth portion of the second terminal may include only downlink subbands. Even if the terminal has received SBFD configuration information (e.g., configuration information for SBFD operation), the SBFD settings may not be included in the active bandwidth portion of the terminal. In other words, the time resources of the terminal may include only non-SBFD settings.

[0185] In the above case, the terminal may not perform the PDCCH resource set switching operation according to "Method 200". The terminal may continuously monitor the first PDCCH resource set associated with the non-SBFD setting. Even in the setting where the uplink subband is configured, the terminal may monitor the first PDCCH resource set. In other words, the operation of the terminal and / or the base station corresponding to the SBFD period may or may not be performed based on the SBFD period formed on the bandwidth part (or whether the SBFD period is formed), rather than based on the SBFD period configured in the carrier. In other words, the SBFD operation of the terminal and / or the base station may or may not be performed based on the association relationship (e.g., inclusion relationship) between the uplink subband and the bandwidth part activated for the terminal. The above operations can be applied similarly or similarly to PUCCH resource set switching, SPS resource set switching, and CG resource set switching, which will be described later.

[0186] As another method, the terminal can still perform a PDCCH resource set switching operation based on "Method 200" on the bandwidth portion. In this case, the terminal can monitor the second PDCCH resource set in the time period in which the uplink subband is configured, and can monitor the first PDCCH resource set in the remaining time period. In other words, the first PDCCH resource set can be associated with the time period in which the uplink subband is not configured, and the second PDCCH resource set can be associated with the time period in which the uplink subband is configured. Even when an SBFD period is not formed on the bandwidth portion activated in the terminal, the terminal and / or the base station can perform SBFD operations in the SBFD period configured based on the carrier bandwidth. The above operations can be equally or similarly applied to PUCCH resource set switching, SPS resource set switching, and CG resource set switching, which will be described later.

[0187] PDCCH resource set switching can be performed on a slot basis. In other words, the terminal can perform a switching operation from the first PDCCH resource set to the second PDCCH resource set based on the boundary point between slot n and slot (n+1), and monitor the first PDCCH until the last symbol of slot n, and then monitor the second PDCCH resource set from the first symbol of slot (n+1). When the terminal's PDCCH blind decoding (BD) operation, CCE counting operation and / or search space set mapping operation are performed on a slot basis, slot-based PDCCH resource set switching may be preferred.

[0188] On the other hand, the time period type of the time slot format can be converted in the middle of the time slot. For example, the time slot format can be converted from a non-SBFD time period to a SBFD time period based on a symbol within time slot n. Alternatively, the time slot format can be converted from a SBFD time period to a non-SBFD time period based on a symbol within time slot n. In this case, as a recommended method, the terminal can switch the PDCCH resource set based on the first full time slot of the converted time period (e.g., the converted SBFD time period or the converted non-SBFD time period). In other words, the terminal can monitor the PDCCH resource set corresponding to the conversion period starting from the first full time slot of the conversion period. This can be referred to as "method 210". Alternatively, as a variation of "method 210", the terminal can monitor the PDCCH resource set corresponding to the conversion period starting from the first time slot in the full time slot of the conversion period that meets the predetermined conditions.

[0189] According to "Method 210", the switching time between the SBFD period and the non-SBFD period may be different from the switching time between the PDCCH resource sets corresponding to the period. In other words, the switching time between the SBFD period and the non-SBFD period may precede the switching time between the PDCCH resource sets corresponding to the period. Even in the case where there is no full time slot or no full time slot that satisfies a predetermined condition in the converted SBFD period or the converted non-SBFD period, if there is a partial time slot to which the PDCCH resource set is to be mapped in the converted SBFD period or the converted non-SBFD period, the terminal may monitor the PDCCH resource set belonging to the converted period in the partial time slot. Alternatively, when there is no full time slot or no full time slot that satisfies a predetermined condition in the converted period, the terminal may not switch the PDCCH resource set, but may continue to monitor the previous PDCCH monitoring set. Hereinafter, "Method 210" will be described in detail.

[0190] Fig.11 is a conceptual diagram illustrating a second exemplary embodiment of a PDCCH resource set switching method based on a slot format.

[0191] Reference Fig.11, the time slot format of the terminal may include a non-SBFD period (e.g., a downlink period) and a SBFD period. Through the above-mentioned PDCCH monitoring set switching method, the terminal may monitor a first PDCCH monitoring set including search space sets #0 and #1 in a non-SBFD period, and may monitor a second PDCCH monitoring set including search space sets #2 and #3 in a SBFD period.

[0192] The time slot format of the terminal can be converted from a non-SBFD period (e.g., a downlink period) to a SBFD period in the middle of time slot n. According to "Method 210", the PDCCH resource set switching of the terminal can be performed on a time slot basis, and the terminal can monitor the second PDCCH monitoring set starting from time slot (n+1), and time slot (n+1) is the first complete time slot of the converted time period (e.g., SBFD period). Therefore, the terminal can monitor the first PDCCH monitoring set until time slot n. The resources of the first PDCCH monitoring set of the non-SBFD period may include a frequency region (e.g., an RB set) corresponding to an uplink subband. As Fig.11 As shown, some search space sets (eg, search space set #1) may overlap with uplink subbands and / or guard bands corresponding to uplink subbands in time slot n.

[0193] In the above case, the terminal may discard all PDCCH monitoring resources overlapping with the uplink subband. For example, the terminal may skip the monitoring operation of the search space set (e.g., PDCCH monitoring opportunity) overlapping with the uplink subband. The operation may refer to the operation of not monitoring all PDCCH candidates belonging to the search space set (e.g., PDCCH monitoring opportunity). The base station may not transmit control information (e.g., DCI) in the search space set (e.g., PDCCH monitoring opportunity) overlapping with the uplink subband. The search space set (e.g., PDCCH monitoring opportunity) may be regarded as not mapped to a time slot (e.g., time slot n). In this case, the total number of PDCCH candidates and / or the total number of CCEs counted by the terminal in the time slot does not include the number of PDCCH candidates and / or the number of CCEs for the search space set that is regarded as not mapped to the time slot. Alternatively, even if the search space set (e.g., PDCCH monitoring opportunity) is not actually monitored, it may be regarded as mapped to the time slot. In this case, the terminal may include the number of PDCCH candidates and / or the number of CCEs for a search space set that is not actually monitored, in the total number of PDCCH candidates and / or the total number of CCEs counted in the slot.

[0194] As another method, the terminal may monitor the PDCCH candidates that do not overlap with the uplink subband in the PDCC candidates belonging to the PDCCH monitoring resources (e.g., search space set and / or PDCCH monitoring opportunity) overlapping with the uplink subband, without monitoring the PDCCH candidates overlapping with the uplink subband. The base station may transmit control information in the PDCCH candidates that do not overlap with the uplink subband, and not transmit control information in the PDCCH candidates that overlap with the uplink subband. The PDCCH candidates that do not overlap with the uplink subband may be PDCCH candidates that do not even contain one RE that overlaps with the uplink subband. In this case, the search space set may be considered to be mapped to a time slot, and the terminal may include the number of PDCCH candidates and / or CCEs for the search space set in the total number of PDCCH candidates and / or CCEs counted in the time slot.

[0195] As a method different from "method 210", the terminal may monitor the PDCCH resource set corresponding to the converted time period from the same moment as the moment when the time period of the time slot format is converted (e.g., the first symbol of the converted time period). In other words, the terminal can monitor multiple PDCCH resource sets in one time slot. In the above exemplary embodiment, the terminal may monitor the first PDCCH resource set at the front of time slot n and monitor the second PDCCH resource set at the back of time slot n. In this case, only the search space set (e.g., PDCCH monitoring opportunity) of the monitoring period (e.g., SBFD period or non-SBFD period) that completely belongs to each PDCCH resource set can be monitored. The search space set (e.g., PDCCH monitoring opportunity) of the monitoring period (e.g., SBFD period or non-SBFD period) that does not completely belong to each PDCCH resource set can be discarded. For example, the search space set (e.g., PDCCH monitoring opportunity, PDCCH candidate) mapped to both SBFD symbols and non-SBFD symbols may not be monitored.

[0196] When the SBFD period and the non-SBFD period (e.g., the downlink period and / or the flexible period) do not include an uplink period, the uplink period may not be associated with a PDCCH resource set. Alternatively, one of the PDCCH resource set corresponding to the SBFD period and the PDCCH resource set corresponding to the non-SBFD period (e.g., the downlink and / or the flexible period) may be associated with the uplink period, and the monitoring period of the one PDCCH resource set may include the uplink period.

[0197] Fig.12 is a conceptual diagram illustrating a third exemplary embodiment of a PDCCH resource set switching method based on a slot format.

[0198] See also Fig.12, an SBFD period for full-duplex communication can be configured for the terminal in time slot n. In other words, the terminal can receive configuration information for the SBFD period of time slot n from the base station. The SBFD period may include an uplink subband and a flexible subband, and a guard band may be inserted between the two subbands. Each subband may correspond to an RB set. For example, the flexible subband and the uplink subband may correspond to a first RB set and a second RB set, respectively. The SBFD period may include only certain symbols of time slot n. That is, the SBFD period may not include the entire time slot. Time slot n may include a downlink period, a SBFD period, and an uplink period in this order. "UL SB" may represent an uplink subband, and "FL SB" may represent a flexible subband.

[0199] By the above method, a first PDCCH resource set for a non-SBFD period and a second PDCCH resource set for a SBFD period may be configured in the terminal. The first PDCCH resource set may include a search space set #0, and the second PDCCH resource set may include a search space set #1. The terminal may monitor the first PDCCH resource set (e.g., search space set #0) in a time slot (n+1) that includes only a non-SBFD period. Since time slot n includes both a non-SBFD period and a SBFD period, it may be difficult to define the operation of the terminal using the above method.

[0200] Since the available downlink transmission bandwidth of the SBFD period is narrower than the available downlink transmission bandwidth of the non-SBFD period, the PDCCH resource set corresponding to the SBFD period can be monitored not only in the SBFD period, but also in the non-SBFD period. As a proposed method, the terminal can monitor the PDCCH resource set configured for the SBFD symbol in a time slot including M or more SBFD symbols. M can be a natural number. For example, M can be 1. A time slot including at least M SBFD symbols can be a time slot including both non-SBFD symbols and SBFD symbols. Alternatively, a time slot including at least M SBFD symbols can be a time slot including only SBFD symbols. If the time slot contains less than M SBFD symbols, the terminal can monitor the PDCCH resource set corresponding to the non-SBFD period in the time slot. The above method can be referred to as "method 220".

[0201] In the above exemplary embodiment, since time slot n contains SBFD symbols, the terminal can monitor the second PDCCH resource set (eg, search space set #1) in all symbols of time slot n (or all symbols except uplink symbols). Fig.12, the terminal can monitor search space set #1 in the flexible subband of the SBFD period of time slot n. In addition to the above operations, since the flexible subband is a subset of the bandwidth part, the terminal can monitor search space set #1 even in the downlink period of time slot n. Therefore, even if the search space set is not set in the SBFD period, the terminal can monitor the second PDCCH resource set in the downlink period or flexible period of the same time slot. According to the above method, the terminal can monitor one PDCCH resource set throughout the entire period of a time slot, and PDCCH resource set switching can still be performed on a time slot basis.

[0202] In "Method 220", the value of M may be determined to be large enough so that the terminal can perform a PDCCH monitoring operation within the SBFD period. Therefore, the value of M may be related to the duration of the CORESET belonging to the second PDCCH resource set. For example, if the CORESET belonging to the second PDCCH resource set includes L symbols, M may have a value of L or greater. L may be a natural number. When the second PDCCH resource set includes multiple CORESETs, M may be equal to or greater than the maximum value of the durations of the multiple CORESETs. Alternatively, M may be greater than or equal to the minimum value of the durations of the multiple CORESETs. Alternatively, the value of M may have a value that is not less than the maximum value of the duration that each of the multiple CORESETs may have. In the NR communication system, since the CORESET can be configured to have 1, 2, or 3 symbols, M may be determined to be equal to or greater than 3. The base station may notify the terminal of the value of M through a signal. Alternatively, the value of M may be shared between the base station and the terminal by being defined in the technical specification.

[0203] In contrast to "Method 220", a higher priority may be applied to the non-SBFD period in time slot n, and a method in which the terminal monitors the first PDCCH resource set (e.g., search space set #0) corresponding to the non-SBFD period may be considered. This method may be referred to as "Method 221". The condition for using "Method 221" may be the above-mentioned "M or more SBFD symbols". Alternatively, the condition that the time slot contains N or more non-SBFD symbols (e.g., downlink symbols and / or flexible symbols) may be regarded as a condition for using "Method 221". However, according to the above method, search space set #0 may be monitored in downlink symbols but not in SBFD symbols. Therefore, the terminal's PDCCH monitoring opportunities are reduced. Alternatively, a method of selectively applying the above two methods may be considered. In other words, the PDCCH resource set monitored by the terminal may be determined under the first condition by "Method 220" and may be determined under the second condition by "Method 221".

[0204] When performing the above-mentioned PDCCH resource set switching (or SSSG switching) operation, the PDCCH resource set monitored by the terminal in the uplink time slot can be maintained. In other words, the PDCCH resource set monitored by the terminal can remain the same as the time slot immediately before the uplink time slot. The uplink time slot can be a time slot that only includes uplink symbols. Even when the time slot includes symbols other than uplink symbols, if the time slot has a configuration that makes it difficult for the terminal to perform a PDCCH monitoring operation thereon, the time slot can be regarded as an uplink time slot, and the PDCCH resource set can be maintained in the time slot.

[0205] In the above exemplary embodiments, the search space sets configured in the terminal may have different frequency ranges. In the first exemplary embodiment, search space set #0 may span all RB sets, while search space set #1 and search space set #2 may be included in the first RB set and the third RB set, respectively. Search space sets with different frequency ranges may correspond to different CORESETs. Search space sets #0, #1, and #2 may be associated with the first CORESET, the second CORESET, and the third CORESET, respectively.

[0206] In a multi-TRP transmission scenario, different TCIs or TCI states may be applied to multiple search space sets. In other words, multiple search space sets may be associated with different CORESETs to which different TCIs are applied, respectively. In a second exemplary embodiment, search space set #0 and search space set #1 in a non-SBFD period may correspond to different TRPs and may be associated with a first CORESET and a second CORESET having different TCIs, respectively. In a SBFD period, search space set #2 and search space set #3 may correspond to different TRPs and may be associated with a third CORESET and a fourth CORESET having different TCIs, respectively.

[0207] At the same time, the number of CORESETs that can be configured for a terminal in one carrier or one bandwidth part may be limited. For example, in one carrier or bandwidth part, a maximum of three CORESETs can be configured for a terminal. Considering the above limitations, in the first exemplary embodiment, three CORESETs can be configured in the same bandwidth part. In the second exemplary embodiment, it may be difficult to configure four CORESETs in the same bandwidth part. In other words, it may be difficult for a terminal performing SBFD operation to support multiple TRP transmissions.

[0208] As a method to solve the above problem, the maximum number of CORESETs that can be configured for a terminal in one carrier or one bandwidth part can be increased. For example, a maximum of N1 CORESETs can be configured in a carrier that is not configured with SBFD operation, and a maximum of N2 CORESETs can be configured in a carrier that is configured with SBFD operation. Each of N1 and N2 can be a natural number, and N2 can be greater than N1. For another example, a maximum of N1 CORESETs can be configured in a bandwidth part that is not configured with SBFD operation, and a maximum of N2 CORESETs can be configured in a bandwidth part that is configured with SBFD operation. The bandwidth part may belong to the same carrier. For example, N2=2×N1. For another example, N2=N1+2. N1 can be 3. The maximum number of configurable CORESETs can be defined for each of the SBFD period and the non-SBFD period. For example, for each of the SBFD period and the non-SBFD period, a maximum of N1 CORESETs can be configured to the terminal. Each CORESET can be arranged in an independent frequency domain. The TCI or TCI state of each CORESET can be configured independently.

[0209] In a CORESET, a CORESET corresponding to a non-SBFD period and a CORESET corresponding to a SBFD period may form a pair. For example, in a second exemplary embodiment, a first CORESET of a non-SBFD period and a third CORESET of a SBFD period may form a first CORESET pair. A second CORESET of a non-SBFD period and a fourth CORESET of a SBFD period may form a second CORESET pair. Each CORESET pair may include a search space set. For example, a first CORESET pair may include a search space set #0 and a search space set #1. Each search space set may be associated with one CORESET forming a CORESET pair. Search space set #0 and search space set #1 may be associated with the first CORESET and the third CORESET, respectively. Alternatively, each search space set may be associated with all of a plurality of CORESETs.

[0210] The above-mentioned PDCCH resource set switching operation can be performed based on multiple CORESETs within each CORESET pair. For the first CORESET pair, the terminal can monitor the first CORESET (or the search space set and / or PDCCH candidates corresponding to the first CORESET) in the non-SBFD period, and can monitor the second CORESET (or the search space set and / or PDCCH candidates corresponding to the second CORESET) in the SBFD period.

[0211] The same TCI or the same TCI state can be applied to multiple CORESETs constituting one CORESET pair. In other words, one TCI can be configured for one CORESET pair, and the configured TCI can be applied to all CORESETs constituting the CORESET pair. Therefore, even if the maximum number of CORESETs that can be configured to the terminal for each bandwidth part increases, the number of TCIs managed by the terminal can be maintained, and the complexity of the terminal receiver does not increase.

[0212] As another method, a CORESET may include multiple frequency domain opportunities (or multiple opportunities), and each frequency domain opportunity may be associated with a search space set. In a second exemplary embodiment, four search space sets may be associated with two CORESETs. For example, the first CORESET may include a first frequency domain opportunity and a second frequency domain opportunity. The first frequency domain opportunity and the second frequency domain opportunity may correspond to a non-SBFD period and a SBFD period (or a SBFD period and a non-SBFD period), respectively. In the above exemplary embodiments, the first frequency domain opportunity may be associated with search space set #0, and the frequency region of search space set #0 may be determined by the first frequency domain opportunity. The second frequency domain opportunity may be associated with search space set #2, and the frequency region of search space set #2 may be determined by the second frequency domain opportunity.

[0213] The first frequency domain opportunity and the second frequency domain opportunity may correspond to the first PDCCH resource set and the second PDCCH resource set, respectively. The second CORESET may include a third frequency domain opportunity and a fourth frequency domain opportunity, and through the above method, the third frequency domain opportunity and the fourth frequency domain opportunity may be associated with search space set #1 and search space set #3, respectively. The third frequency domain opportunity and the fourth frequency domain opportunity may correspond to the first PDCCH resource set and the second PDCCH resource set, respectively. See Fig.11 , the frequency region of the first frequency domain opportunity and the frequency region of the third frequency domain opportunity may overlap.

[0214] The above-mentioned PDCCH resource set switching operation can be performed based on multiple frequency domain opportunities within each CORESET. For the first CORESET, the terminal can monitor the first frequency domain opportunity (or the search space set and / or PDCCH candidate corresponding to the first frequency domain opportunity) during the non-SBFD period, and can monitor the second frequency domain opportunity (or the search space set and / or PDCCH candidate corresponding to the second frequency domain opportunity) during the SBFD period. The same TCI or the same TCI state can be applied to multiple frequency domain opportunities that constitute the CORESET. In other words, a TCI can be configured for a CORESET, and the configured TCI can be commonly applied to all frequency domain opportunities that constitute the CORESET and the search space set corresponding to the CORESET. According to the above method, the switching operation of the PDCCH resource set of the terminal for SBFD operation can be performed without increasing the number of CORESETs configured in the terminal. In other words, at least from the perspective of the terminal's capabilities, a CORESET including multiple frequency domain opportunities can be counted as one CORESET, just like a traditional CORESET (e.g., a CORESET with a common frequency domain).

[0215] As described above, multiple frequency domain opportunities can be associated with one CORESET. The association relationship can be configured through a signaling process from the base station to the terminal. For example, the PDCCH resource configuration information may include information about the association relationship, and the information about the association relationship may be part of the CORESET configuration information or the search space set configuration information. Multiple frequency domain opportunities may occupy different PRBs in the bandwidth portion. The PDCCH resource configuration information may also additionally include information about the RB set that constitutes each frequency domain opportunity. For example, each frequency domain opportunity can be allocated in basic units of 6 PRBs (or 6 CRBs corresponding to 6 PRBs).

[0216] In the SBFD period, the frequency position of the frequency domain opportunity can be determined based on the first RB of the subband (e.g., uplink subband, downlink subband, flexible subband) or the first RB of the RB set corresponding to the subband. In the non-SBFD period, the frequency position of the frequency domain opportunity can be determined based on the first RB of the carrier or the first RB of the bandwidth part. In other words, the reference frequency point (e.g., reference RB) used to determine the frequency position of the frequency domain opportunity can be determined based on whether the frequency domain opportunity is applied to the SBFD symbol. The terminal can receive information from the base station indicating which period (e.g., SBFD period or non-SBFD period) each frequency domain opportunity applies to. For example, the above information may be included in the PDCCH resource configuration information. The PDCCH resource configuration information may be transmitted to the terminal based on RRC signaling, MAC CE and / or DCI.

[0217] In the above method, the relationship between the frequency region of CORESET and the frequency domain opportunity can be defined.

[0218] Fig.13A is a conceptual diagram showing a first exemplary embodiment of a method for arranging frequency domain opportunities associated with a CORESET, Fig. 13B is a conceptual diagram illustrating a second exemplary embodiment of a method for arranging frequency domain opportunities associated with a CORESET.

[0219] See also Fig.13A and Fig. 13B , a first CORESET, a first frequency domain opportunity associated with the first CORESET, and a second frequency domain opportunity associated with the first CORESET can be configured in the terminal. In other words, the terminal can receive configuration information of the first CORESET, configuration information of the first frequency domain opportunity associated with the first CORESET, and configuration information of the second frequency domain opportunity associated with the first CORESET from the base station. Through the above method, the terminal can form a search space set based on the first frequency domain opportunity, and monitor PDCCH candidates on the formed search space set in a non-SBFD period. The terminal can form a search space set based on the second frequency domain opportunity, and monitor PDCCH candidates on the formed search space set in a SBFD period. The base station can transmit control information about one or more PDCCH candidates among the PDCCH candidates.

[0220] according to Fig.13A In a first exemplary embodiment of the present invention, the frequency region of the first frequency domain opportunity and the frequency region of the second frequency domain opportunity may be different from the frequency region of the first CORESET. The search space set based on the first frequency domain opportunity may be arranged in the frequency region of the first frequency domain opportunity regardless of the frequency region of the first CORESET. The search space set based on the second frequency domain opportunity may be arranged in the frequency region of the second frequency domain opportunity regardless of the frequency region of the first CORESET. The frequency resource allocation information of the first CORESET may be covered by the configuration information of the frequency region of each frequency domain opportunity.

[0221] according to Fig. 13BIn a second exemplary embodiment, the frequency regions of some frequency domain opportunities associated with the first CORESET may overlap with the frequency region of the first CORESET. For example, the frequency region of the first frequency domain opportunity may match the frequency region of the first CORESET. The frequency region of the second frequency domain opportunity may be different from the frequency region of the first CORESET. Configuration information of the frequency region of the first CORESET may be included in the CORESET configuration information, and the CORESET configuration information may be transmitted to the terminal. In this case, the configuration information of the frequency region of the first frequency domain opportunity may not be transmitted separately to the terminal, and the PDCCH resource configuration information may only include the configuration information of the frequency region of the second frequency domain opportunity. The frequency region of the first CORESET may be consistent with the frequency region of the frequency domain opportunity applied to the non-SBFD period in the frequency domain opportunity associated with the first CORESET. Alternatively, the frequency region of the first CORESET may be consistent with the frequency region of the frequency domain application (e.g., the second frequency domain opportunity) applied to the SBFD period in the frequency domain opportunity associated with the first CORESET.

[0222] In another exemplary embodiment, the frequency region of at least some frequency domain opportunities associated with the first CORESET may be determined based on the frequency resources of the first CORESET. In this case, the frequency region of the frequency domain opportunity does not necessarily need to match the frequency region of the first CORESET. For example, at least a portion of the frequency region of the frequency domain opportunity may be represented by a frequency offset from the starting RB of the first CORESET and may be configured to the terminal. Additionally or alternatively, at least a portion of the frequency region of the frequency domain opportunity may be determined as a region obtained by shifting the frequency region of the first CORESET by X RBs. X may be a natural number.

[0223] See also Fig.13A and Fig. 13B , the frequency domain opportunity may be composed of multiple frequency clusters. Each frequency cluster may be a group of continuous RBs, and multiple frequency clusters may be discontinuous with each other. Each frequency cluster may be included in a subband (e.g., a downlink subband, a flexible subband). In addition, each frequency cluster may not include even one RB belonging to an uplink subband. Each frequency cluster may not include even one RB as a guard band. PDCCH candidates belonging to a search space set formed based on frequency domain opportunities may be distributed and mapped to multiple frequency clusters. For example, a PDCCH candidate may include both CCEs belonging to a first frequency cluster and CCEs belonging to a second frequency cluster. Alternatively, each PDCCH candidate may be mapped into a frequency cluster, and the terminal may perform a PDCCH monitoring operation for each frequency cluster.

[0224] A search space set can be associated with multiple frequency domain opportunities. For example, the first search space set belonging to the first CORESET can be associated with the first frequency domain opportunity and the second frequency domain opportunity associated with the first CORESET. The first frequency domain opportunity can be monitored in a non-SBFD period, and the second frequency domain opportunity can be monitored in a SBFD period. In this case, in the non-SBFD period, the terminal can consider the first search space set to be mapped to the frequency region corresponding to the first frequency domain opportunity. In the SBFD period, the terminal can consider the first search space set to be mapped to the frequency region corresponding to the second frequency domain opportunity.

[0225] In addition to the frequency region, other characteristics of the first search space set and the first CORESET (such as time resource arrangement, monitoring period, time slot offset, CCE aggregation level, number of PDCCH candidates, CCE-REG mapping, application of interleaving, application of broadband, TCI, etc.) can also be assumed by the terminal to be the same regardless of which time period the first search space set is applied to, and the terminal can perform PDCCH monitoring operations corresponding to the first search space set.

[0226] As another method, different search space sets can be associated with multiple frequency domain opportunities, respectively. For example, the first search space set and the second search space set belonging to the first CORESET can be associated with the first frequency domain opportunity and the second frequency domain opportunity associated with the first CORESET, respectively. The first search space set can be mapped to a frequency region corresponding to the first frequency domain opportunity and can be monitored in a non-SBFD period. The second search space set can be mapped to a frequency region corresponding to the second frequency domain opportunity and can be monitored in a SBFD period. The first search space set and the second search space set can share the characteristics of the first CORESET, but in addition to the above characteristics, characteristics based on the search space set configuration information (such as time resource arrangement, monitoring period, time slot offset, etc.) can also be independently configured in the first search space set and the second search space set.

[0227] The above operation may be applied only to part of the CORESETs configured in the terminal. For example, the above operation may be applied to the remaining CORESETs except CORESET 0. Additionally or alternatively, whether to apply the above operation may be configured by the base station for each CORESET or each CORESET-to-terminal. In the above method, the method based on a CORESET pair may also be applied to CORESET 0. CORESET 0 may form a CORESET pair with another CORESET. CORESET 0 may be configured to monitor during a non-SBFD period or a SBFD period. Alternatively, the period for applying CORESET 0 may be predefined in the technical specification. For example, CORESET 0 may be associated with a non-SBFD period and may be monitored during the non-SBFD period.

[0228] In the above method, the method based on multiple frequency domain opportunities can also be applied to CORESET 0. For example, the first frequency domain opportunity and the second frequency domain opportunity can be associated with CORESET 0. The frequency region of one of the frequency domain opportunities can overlap with the frequency region of CORESET 0. For example, the first frequency domain opportunity applied to the non-SBFD period can overlap with the frequency region of CORESET 0. In addition, the frequency region that CORESET 0 can have can be limited. For example, CORESET 0 may not overlap with the frequency region corresponding to the uplink subband. CORESET 0 can be arranged to be limited to the downlink subband or the flexible subband.

[0229] The above-mentioned PDCCH resource set switching operation may be defined based on the capability of the terminal. The terminal may transmit a capability signaling message including information on whether the terminal supports the PDCCH resource set switching operation to the base station. The base station may configure or instruct the terminal to perform the above-mentioned PDCCH resource set switching operation based on the capability signaling message.

[0230] The PDCCH may be repeatedly transmitted by multiple TRPs. The first search space set and the second search space set may be configured in the terminal, and the first search space set and the second search space set may be linked to each other for repeated PDCCH transmission. The first PDCCH candidate belonging to the first search space set and the second PDCCH candidate belonging to the second search space set may be linked to each other. The PDCCH may be repeatedly transmitted based on the first PDCCH candidate and the second PDCCH candidate linked to each other. The terminal may monitor the first PDCCH candidate and / or the second PDCCH candidate linked to each other to receive the repeatedly transmitted PDCCH. The first PDCCH candidate and the second PDCCH candidate linked to each other may have the same CCE aggregation level and the same PDCCH candidate index. The first search space set and the second search space set may correspond to different CORESETs, and different CORESETs may have unique TCIs. Different CORESETs (e.g., the first search space set and the second search space set) may correspond to multiple TRP transmissions. Alternatively, the first search space set and the second search space set may belong to the same CORESET. The same CORESET (e.g., the first search space set and the second search space set) may correspond to a single TRP transmission.

[0231] In a second exemplary embodiment, repeated PDCCH transmissions may be performed. For example, during a non-SBFD period, search space set #0 and search space set #1 may be linked for repeated PDCCH transmissions and may correspond to a first CORESET and a second CORESET, respectively. During a SBFD period, search space set #2 and search space set #3 may be linked for repeated PDCCH transmissions and may correspond to a third CORESET and a fourth CORESET, respectively. Through the above method, the first CORESET and the third CORESET may form a CORESET pair and may correspond to the same TCI (e.g., the first TCI). The second CORESET and the fourth CORESET may form a CORESET pair and may correspond to the same TCI (e.g., the second TCI). One of the CORESETs constituting the CORESET pair may belong to a SBFD symbol, and the other may belong to a non-SBFD symbol. Alternatively, through another method described above, during a SBFD period, search space set #2 and search space set #3 may correspond to a first CORESET and a second CORESET, respectively. Search space set #0 and search space set #2 may correspond to different frequency domain opportunities of the first CORESET and may correspond to the same TCI (e.g., the first TCI). Search space set #1 and search space set #3 may correspond to different frequency domain opportunities of the second CORESET and may correspond to the same TCI (e.g., the second TCI). One of the multiple frequency domain opportunities (or multiple search space sets with different frequency domain regions) constituting the CORESET may belong to a SBFD symbol, and another may belong to a non-SBFD symbol.

[0232] As a suggested method, search space set #0 can be linked to search space set #3 having the same QCL relationship as search space set #1 for repeated PDCCH transmission. Search space set #2 can be linked to search space set #1 having the same QCL relationship as search space set #3 for repeated PDCCH transmission. Search space set #1 can be linked to search space set #2 having the same QCL relationship as search space set #0 for repeated PDCCH transmission, and search space set #3 can be linked to search space set #0 having the same QCL relationship as search space set #2 for repeated PDCCH transmission. In other words, the search space set belonging to the non-SBFD period and the search space set belonging to the SBFD period can be linked to each other, and the terminal can monitor the search space set belonging to the non-SBFD period (e.g., the PDCCH candidates corresponding to the search space set) and the search space set belonging to the SBFD period (e.g., the PDCCH candidates corresponding to the search space set) that are linked to each other to receive repeated PDCCH transmission.

[0233] The above operation can be performed when a predetermined condition is met. For example, in the second exemplary embodiment, a switch from a non-SBFD period to a SBFD period can occur within time slot n, and search space set #1 can overlap with an uplink subband. The terminal can skip monitoring operations for all PDCCH candidates in search space set #1, or skip monitoring operations for at least PDCCH candidates that overlap with uplink subbands in the PDCCH candidates constituting search space set #1. In this case, in order to monitor the repeatedly transmitted PDCCH, the terminal can monitor search space set #3 having the same QCL relationship as search space set #1 instead of search space set #1. For example, search space set #0 and search space set #3 can be linked to each other, and the terminal can assume that the PDCCH is repeatedly transmitted in the PDCCH candidate pair corresponding to search space set #0 and search space set #3. According to the above method, repeated PDCCH transmissions can be performed in multiple time slots. Repeated PDCCH transmissions can be performed in a period that includes both non-SBFD periods and SBFD periods. Alternatively, the terminal may skip monitoring of search space set #1 and search space set #0, and may monitor search space set #2 and search space set #3 linked to each other to receive repeated PDCCH transmissions. In other words, search space set #0 and search space set #1 may be replaced by search space set #2 and search space set #3, respectively.

[0234] As another method, all search space sets or PDCCH candidates linked for repeated PDCCH transmissions may be mapped only to SBFD symbols. Alternatively, all search space sets or PDCCH candidates linked for repeated PDCCH transmissions may be mapped only to non-SBFD symbols. The terminal may not expect the search space sets for repeated PDCCH transmissions or the PDCCH candidates for repeated PDCCH transmissions to be mapped to both SBFD symbols and non-SBFD symbols. When the search space sets linked for repeated PDCCH transmissions or the PDCCH candidates linked for repeated PDCCH transmissions are mapped to both SBFD symbols and non-SBFD symbols, the terminal may skip at least part of the PDCCH monitoring operation.

[0235] For example, the terminal may monitor neither the search space set linked for repeated PDCCH transmission nor the PDCCH candidates linked for repeated PDCCH transmission. For another example, the terminal may monitor the search space set linked for repeated PDCCH transmission or the PDCCH candidates linked for repeated PDCCH transmission. For example, the monitoring target may be 'a search space set or a PDCCH candidate that is earlier in time', 'a search space set or a PDCCH candidate that is later in time', 'a search space set with a low search space set ID', 'a search space set with a high search space set ID', 'a search space set or a PDCCH candidate belonging to a SBFD period', or 'a search space set or a PDCCH candidate belonging to a non-SBFD period'.

[0236] The above method can be performed regardless of the type of search space set. In other words, the above method can be applied to CSS sets and USS sets in the same way. Alternatively, the above method can be applied differently for each search space set type. For example, the above PDCCH resource set switching method can be applied only to USS sets. The CORESET forming a CORESET pair or the multiple frequency domain opportunities constituting the CORESET (or multiple search space sets with different frequency regions) may include only USS sets. When switching from an SBFD period to a non-SBFD period or from a non-SBFD period to an SBFD period, the terminal can monitor the CSS set without changing the frequency region of the CSS set.

[0237] The above-mentioned PDCCH resource set switching method may be used for uplink transmission in the same or similar manner.

[0238] Fig.14 is a conceptual diagram showing a first exemplary embodiment of a PUCCH resource set switching method based on a slot format.

[0239] See also Fig.14 , the base station may configure a time slot format including an SBFD period and a non-SBFD period to the terminal. The terminal may receive configuration information of the time slot format from the base station. The uplink subband and / or the guard band may be arranged in the SBFD period, and the uplink subband and / or the guard band may coexist with the downlink resource (e.g., the downlink subband). The non-SBFD period may include a set of continuous uplink symbols.

[0240] The terminal may receive configuration information of multiple PUCCH resource sets from the base station. Multiple PUCCH resource sets may include at least a first PUCCH resource set and a second PUCCH resource set. A PUCCH resource set may include one or more PUCCH resources. The terminal may determine one of the PUCCH resources constituting the PUCCH resource set based on predefined rules and / or signaling from the base station, and may transmit the PUCCH in the determined PUCCH resource. PUCCH may include uplink control information (UCI), and UCI may include HARQ-ACK, SR, CSI, etc. The first PUCCH resource set may be arranged to be limited to an uplink subband to avoid overlapping with a downlink subband, and the second PUCCH resource set may be arranged in a relatively wide frequency region.

[0241] Similar to PDCCH, each PUCCH resource set may be associated with a specific time period of a time slot format. According to an exemplary embodiment of the present disclosure, a first PUCCH resource set and a second PUCCH resource set may be associated with a SBFD time period and a non-SBFD time period (e.g., an uplink time period), respectively. Here, an SBFD time period may refer to a time period in which a downlink subband is configured, and a non-SBFD time period may refer to a time period in which a downlink subband is not configured. Based on this association, the terminal may determine the PUCCH resources using the first PUCCH resource set in the SBFD time period. The terminal may transmit PUCCH (e.g., PUCCH resources determined in the SBFD time period) in the SBFD time period. The terminal may determine the PUCCH resources using the second PUCCH resource set in a non-SBFD time period (e.g., an uplink time period). The terminal may transmit PUCCH (e.g., PUCCH resources determined in the non-SBFD time period) in the non-SBFD time period.

[0242] That is, the terminal can perform uplink transmission operations based on the PUCCH resource set corresponding to each time period of the time slot format, and can switch the PUCCH resource set according to the time when the time slot format is converted. For example, when the time slot format is converted from a non-SBFD time period (e.g., an uplink time period) to a SBFD time period, the PUCCH resources of the terminal can be switched from the second PUCCH resource set to the first PUCCH resource set. When the time slot format is converted from an SBFD time period to a non-SBFD time period (e.g., an uplink time period), the PUCCH resources of the terminal can be switched from the first PUCCH resource set to the second PUCCH resource set. The switching operation can be performed based on a time pattern given to the terminal in advance (e.g., a semi-statically configured time slot format) rather than based on instantaneous signaling from the base station.

[0243] The first PUCCH resource set and the second PUCCH resource set may be allocated on the same RB grid. For example, the PUCCH resources constituting the first PUCCH resource set and the PUCCH resources constituting the second PUCCH resource set may be configured in an uplink bandwidth portion (e.g., a set of PRBs) activated in the terminal. The PUCCH resources constituting the first PUCCH resource set and the PUCCH resources constituting the second PUCCH resource set may be configured based on the same PRB index within the uplink bandwidth portion.

[0244] The PUCCH resource set configured for the random access operation of the terminal (for example, a PUCCH resource set configured based on broadcast information, a cell-common RRC message, a pucch resource common parameter, etc.) can be configured as a second PUCCH resource set. At the same time, the PUCCH resources constituting the PUCCH resource set (hereinafter referred to as the 'common PUCCH resource set') can be mapped to the initial uplink bandwidth portion. Therefore, depending on the position of the initial uplink bandwidth portion, the PUCCH resources constituting the public PUCCH resource set may be difficult to be fully included in the uplink subband configured for full-duplex communication. Therefore, the use of the public PUCCH resource set as the first PUCCH resource set can be restricted. Alternatively, however, with appropriate implementation of the base station, it may also be allowed to configure the public PUCCH resource set as the first PUCCH resource set.

[0245] In the above operation, among the PUCCH resources constituting the first PUCCH resource set, the PUCCH resources that completely belong to the SBFD period can be regarded as valid PUCCH resources, and the PUCCH resources that at least partially deviate from the SBFD period can be regarded as invalid PUCCH resources. In addition, among the PUCCH resources constituting the second PUCCH resource set, the PUCCH resources that completely belong to the non-SBFD period can be regarded as valid PUCCH resources, and the PUCCH resources that at least partially deviate from the non-SBFD period can be regarded as invalid PUCCH resources.

[0246] The PUCCH resources can be determined based on the signaling message received from the base station (e.g., the PUCCH resource indicator included in the DCI) and / or the location of the PDCCH resource that transmits the scheduled DCI. In this case, the base station can instruct the terminal to transmit PUCCH only using valid PUCCH resources. The terminal may not expect invalid PUCCH resources to be indicated for PUCCH transmission. As another method, if invalid PUCCH resources are indicated to the terminal for PUCCH transmission, the terminal can omit the PUCCH transmission operation. Alternatively, if invalid PUCCH resources are indicated to the terminal for PUCCH transmission, the terminal can select a PUCCH resource different from the indicated PUCCH resource within the PUCCH resource set and transmit PUCCH in the selected PUCCH resource.

[0247] The first PUCCH resource set and the second PUCCH resource set may each include PUCCH resources consisting of multiple PUCCH instances for repeated PUCCH transmissions. Repeated PUCCH transmissions may be performed only in SBFD periods or non-SBFD periods. In other words, the PUCCH resources belonging to the first PUCCH resource set may include R1 PUCCH instances (e.g., repeated transmission resources), and all R1 PUCCH instances may be mapped to SBFD periods. In addition, the PUCCH resources belonging to the second PUCCH resource set may include R2 PUCCH instances, and all R2 PUCCH instances may be mapped to non-SBFD periods. Each of R1 and R2 may be a natural number.

[0248] When PUCCH is repeatedly transmitted, frequency hopping can be applied between PUCCH instances. In other words, some PUCCH instances can be transmitted at a first frequency position, while the remaining PUCCH instances can be transmitted at a second frequency position. Frequency hopping can be applied between multiple PUCCH instances within a time slot. Alternatively, frequency hopping can be applied between multiple PUCCH instances mapped to multiple time slots. Since the uplink frequency resources of the SBFD period are different from the uplink frequency resources of the non-SBFD period, the frequency hopping ranges of the PUCCH resources belonging to the first PUCCH resource set and the PUCCH resources belonging to the second PUCCH resource set may be different. In order to support the above operations, information about the PRB corresponding to the first frequency position (e.g., the starting PRB index) and information about the PRB corresponding to the second frequency position (e.g., the starting PRB index) can be separately configured for each PUCCH resource. In addition to frequency hopping, uplink power control, transmit beams (or uplink TCI, spatial relationship information, etc.) can be managed separately for PUCCH resources belonging to the first PUCCH resource set and PUCCH resources belonging to the second PUCCH resource set, and configuration parameters corresponding to each PUCCH resource set can be configured separately for each PUCCH resource. The PUCCH resource set switching operation can be performed on a slot basis. For example, the terminal can perform a switching operation from the first PUCCH resource set to the second PUCCH resource set based on the boundary point between slot n and slot (n+1). The first PUCCH resource set can be valid until the last symbol of slot n, and the second PUCCH resource set can be valid from the first symbol of slot (n+1). On the other hand, the time period type of the slot format can be converted in the middle of the slot. For example, the slot format can be converted from an SBFD period to a non-SBFD period based on a symbol within slot n. As a recommended method, the terminal can switch the PUCCH resource set based on the first full slot of the converted period (e.g., a converted SBFD period or a converted non-SBFD period). In other words, the terminal may perform a PUCCH resource determination operation and / or a PUCCH transmission operation using a PUCCH resource set corresponding to the converted period starting from the first full time slot of the converted period. Alternatively, the terminal may apply a PUCCH resource set corresponding to the converted period to uplink transmission starting from the first time slot among the full time slots in the converted period that meets a predetermined condition.

[0249] When the above method is used, the period of the time slot format in the first time slot is converted, but there may be a time period in which the PUCCH resource set is not switched. In this time period, some PUCCH resources may overlap with downlink resources (e.g., downlink subbands). The terminal may regard the PUCCH resources overlapping with the downlink resources (e.g., downlink subbands) as invalid resources, and may exclude the invalid resources from the candidate resources when determining the PUCCH resources.

[0250] A time slot may include both a SBFD period and a non-SBFD period (e.g., uplink symbols). The terminal may perform a PUCCH transmission operation based on a PUCCH resource set associated with the SBFD period in the time slot. As a first scheme, a PUCCH transmission operation may be performed under predetermined conditions. For example, when a time slot includes M or more SBFD symbols, a first PUCCH resource set may be applied to the entire period of the time slot. M may be a natural number. As a second scheme, the terminal may assign a higher priority to a non-SBFD period in the time slot, and perform a PUCCH transmission operation based on a PUCCH resource set associated with the non-SBFD period. The first scheme may guarantee a larger number of valid PUCCH resources than the second scheme, and the PUCCH reception performance may be improved according to the first scheme.

[0251] At the same time, resource allocation of data channels can be performed through dynamic scheduling, semi-static scheduling, or semi-persistent scheduling. When using dynamic scheduling, the base station can consider the time slot format and SBFD period of the terminal, and appropriately allocate resources through DCI so that PDSCH does not overlap with the uplink area, and appropriately allocate resources through DCI so that PUSCH does not overlap with the downlink area. When using semi-persistent scheduling, Fig. 9 Similar to the exemplary embodiment shown in , the resource period of SPS PDSCH or CGPUSCH may not match the repetition period of the time slot format. Alternatively, the resource period of SPS PDSCH or CG PUSCH may not have an inclusive relationship with the repetition period of the time slot format. As a result, the problem of SPS resources or CG resources being arranged in an unexpected period of the time slot format (e.g., an SBFD period or a non-SBFD period) may occur.

[0252] As a method for solving the above-mentioned problem, the above-mentioned PDCCH / PUCCH resource set switching method can be applied to SPS PDSCH and CG PUSCH in a similar manner. The terminal can receive multiple SPS configurations (or multiple CG configurations) from the base station. The SPS configuration can refer to the SPS configuration information, and the CG configuration can refer to the CG configuration information. Each SPS configuration (or each CG configuration) may include periodically repeated SPS PDSCH resources (or CG PUSCH resources) and scheduling information for periodically repeated SPS PDSCH resources (or CGPUSCH resources). Multiple SPS configurations (or multiple CG configurations) may be associated with different time slot format periods, and the terminal may determine the SPS PDSCH resources (or CG PUSCH resources) based on the SPS configuration (or CG configuration) associated with each time slot format period in each time slot format, and receive (or transmit) PDSCH (or PUSCH) in the determined resources. According to the above method, the SPS configuration or CG configuration may be switched when the time slot format period is converted to another type.

[0253] According to an exemplary embodiment, the first SPS configuration configured in the terminal can be associated with a non-SBFD period (e.g., a downlink period), and the second SPS configuration configured in the terminal can be associated with a SBFD period (e.g., a SBFD period with a UDU subband mode). According to the time when the time slot format is converted from a non-SBFD period to a SBFD period, the SPS PDSCH reception operation of the terminal can be switched from an operation based on the first SPS configuration to an operation based on the second SPS configuration. The switching time of the SPS reception resource can coincide with the switching time between the non-SBFD period and the SBFD period. Alternatively, the switching time of the SPS reception resource can be determined as a full time slot after the switching time between the non-SBFD period and the SBFD period.

[0254] According to another exemplary embodiment, the first CG configuration configured in the terminal may be associated with an SBFD period (e.g., an SBFD period with a DUD subband mode), and the second CG configuration configured in the terminal may be associated with a non-SBFD period (e.g., an uplink period). According to the time when the time slot format is converted from the SBFD period to the non-SBFD period, the CG PUSCH transmission operation of the terminal may be switched from the operation based on the first CG configuration to the operation based on the second CG configuration. The switching time of the CG transmission resource may coincide with the switching time between the non-SBFD period and the SBFD period. Alternatively, the switching time of the CG transmission resource may be determined as a full time slot after the switching time between the non-SBFD period and the SBFD period.

[0255] In a time slot that includes both an SBFD period and a non-SBFD period, the terminal can select a first SPS configuration or a second SPS configuration, apply the selected SPS configuration to the entire period of the time slot, and perform an SPS PDSCH reception operation and an SPS HARQ-ACK transmission operation based on the selected SPS configuration. For example, the terminal can perform an operation based on the second SPS configuration associated with the SBFD period in the time slot. In a time slot that includes both an SBFD period and a non-SBFD period, the terminal can select a first CG configuration or a second CG configuration, apply the selected CG configuration to the entire period of the time slot, and perform a CG PUSCH transmission operation based on the selected CG configuration.

[0256] The SPS configuration may correspond to an SPS opportunity. The SPS opportunity may refer to a periodically repeated SPS resource. The terminal may receive configuration information of a first SPS opportunity and a second SPS opportunity, and the first SPS opportunity and the second SPS opportunity may be associated with a non-SBFD period and a SBFD period, respectively. The first SPS opportunity and the second SPS opportunity may belong to the same SPS configuration. In other words, the SPS reception resource switching operation of the terminal may be performed based on multiple SPS opportunities within an SPS configuration. The same period value may be applied to the resource repetition period of multiple SPS opportunities belonging to the same SPS configuration.

[0257] The CG configuration may correspond to a CG opportunity. The CG opportunity may refer to a periodically repeated CG resource. The terminal may receive configuration information of a first CG opportunity and a second CG opportunity, and the first CG opportunity and the second CG opportunity may be associated with an SBFD period and a non-SBFD period, respectively. The first CG opportunity and the second CG opportunity may belong to the same CG configuration. In other words, the CG transmission resource switching operation of the terminal may be performed based on multiple CG opportunities within a CG configuration. The same period may be applied to the resource repetition period of multiple CG opportunities belonging to the same CG configuration.

[0258] SPS configurations or SPS opportunities can be allocated to the same set of PRBs in the same bandwidth part (e.g., activated downlink bandwidth part). CG configurations or CG opportunities can be allocated to the same set of PRBs in the same bandwidth part (e.g., activated uplink bandwidth part).

[0259] When dynamic scheduling is used, some scheduling-related parameters (such as scheduling parameters) may be applied differently to SBFD periods and non-SBFD periods. In this case, a first group and a second group of scheduling parameters may be configured for the terminal, and the first group and the second group may be associated with the SBFD period and the non-SBFD period, respectively. Based on the above association relationship, the terminal may apply the scheduling parameters corresponding to each period and perform a transmission or reception operation of the data channel. In other words, the scheduling parameters may be switched from the first group to the second group when switching between the SBFD period and the non-SBFD period. Alternatively, the scheduling parameters may be switched from the second group to the first group when switching between the SBFD period and the non-SBFD period. The switching operation may be repeated. For example, the scheduling parameters may include uplink power control (e.g., PUSCH power control, PUCCH power control, SRS power control) parameters.

[0260] As another example, the scheduling parameters may include TCI indication information or TCI configuration information. Candidate TCIs (or candidate TCI states) applied to PDSCH reception may be configured in the terminal, and the terminal may receive information indicating that some of the configured candidate TCIs are applied to PDSCH reception through dynamic signaling (e.g., DCI, MAC CE). Candidate TCIs (or candidate TCI states) applied to PUSCH transmission may be configured in the terminal, and the terminal may receive information indicating that some of the configured candidate TCIs are applied to PUSCH transmission through dynamic signaling (e.g., DCI, MAC CE). In the case of PDSCH, TCI may correspond to downlink TCI, receive beam, transmit / receive beam pair, spatial reception parameter, receive spatial filter, D-type QCL, etc. In the case of PUSCH, TCI may correspond to uplink TCI, transmit beam, spatial relationship information, transmit spatial filter, etc. The set of candidate TCIs may be referred to as a TCI pool.

[0261] According to an exemplary embodiment, the terminal may receive configuration information of a first TCI pool and a second TCI pool for a PDSCH reception operation (or a PUSCH transmission operation) from a base station. The first TCI pool and the second TCI pool may be associated with a non-SBFD period and a SBFD period, respectively. Based on the association relationship, the terminal may determine the TCI to be applied to the reception of the PDSCH (or the transmission of the PUSCH) allocated to the non-SBFD period based on the first TCI pool, and may determine the TCI to be applied to the reception of the PDSCH (or the transmission of the PUSCH) allocated to the SBFD period based on the second TCI pool. In other words, the TCI pool may be dynamically switched before and after the SBFD period.

[0262] According to the above method, the base station can exclude the transmit beam or receive beam that may cause strong cross-link interference in the SBFD period from the second TCI pool. In other words, the second TCI pool can be conservatively configured in consideration of cross-link interference. Alternatively, the second TCI pool can be configured with a small number of candidate TCIs in consideration of cross-link interference. According to an exemplary embodiment, the second TCI pool can be a subset of the first TCI pool. In other words, the second TCI pool can be composed of the remaining candidate TCIs except for some TCIs in the candidate TCIs constituting the first TCI pool. Due to the inclusion relationship, the signaling overhead for configuring multiple TCI pools can be reduced.

[0263] The operation of the method according to the exemplary embodiment of the present disclosure can be implemented as a computer-readable program or code in a computer-readable recording medium. The computer-readable recording medium may include various recording devices for storing data that can be read by a computer system. In addition, the computer-readable recording medium can store and execute programs or codes, which can be distributed in computer systems connected via a network and read by a computer in a distributed manner.

[0264] The computer readable recording medium may include a hardware device specially configured to store and execute program commands, such as ROM, RAM or flash memory. The program command may include not only the machine language code created by the compiler, but also the high-level language code that the computer can execute using an interpreter.

[0265] Although some aspects of the present disclosure have been described in the context of a device, these aspects may indicate the corresponding description according to the method, and a block or device may correspond to the steps of the method or the features of the steps. Similarly, the aspects described in the context of the method may be represented as the features of the corresponding blocks or items or corresponding devices. Some or all steps of the method may be performed by (or using) a hardware device (e.g., a microprocessor, a programmable computer, or an electronic circuit). In some embodiments, one or more of the most important steps of the method may be performed by such a device.

[0266] In some exemplary embodiments, a programmable logic device (e.g., a field programmable gate array) may be used to perform some or all of the functions of the methods described herein. In some exemplary embodiments, a field programmable gate array may operate with a microprocessor to perform one of the methods described herein. Typically, these methods are preferably performed by some hardware device.

[0267] The description of the present disclosure is merely exemplary, and therefore, changes that do not depart from the essence of the present disclosure are intended to fall within the scope of the present disclosure. Such changes should not be considered to be out of the spirit and scope of the present disclosure. Therefore, it will be understood by those of ordinary skill in the art that various changes in form and detail may be made without departing from the spirit and scope defined in the claims.

Claims

1. A terminal method, comprising: receiving time slot format information from a base station; identifying a downlink (DL) period, a flexible (FL) period, and an uplink (UL) period based on the time slot format information; receiving UL subband information from the base station; and In response to a UL subband indicated by the UL subband information overlapping with a DL resource region in the DL period, treating the DL resource region as a UL resource region, The period in which the DL resource region overlaps with the UL subband is a sub-band full duplex (SBFD) period, and the period in which the DL resource region overlaps with the UL subband is a non-SBFD period.

2. The method according to claim 1, wherein: When the UL subband overlaps with the FL resource region within the FL period, the FL resource region is regarded as a UL resource region, and the SBFD period includes a period in which the DL resource region overlaps with the UL subband and a period in which the FL resource region overlaps with the UL subband.

3. The method according to claim 1, wherein: A transmission direction based on the UL subband information has a higher priority than a transmission direction based on the time slot format information, and the transmission direction is at least one of DL, FL or UL.

4. The method according to claim 1, wherein: The UL subband information includes time resource information and frequency resource information, the frequency resource information indicates a resource block (RB) set, and the RB set includes one or more RBs.

5. The method according to claim 1, further comprising: receiving, from the base station, configuration information of a first physical downlink control channel (PDCCH) resource set associated with the non-SBFD period and configuration information of a second PDCCH resource set associated with the SBFD period; Performing a first monitoring operation on the first PDCCH resource set during the non-SBFD period; as well as performing a second monitoring operation on the second PDCCH resource set within the SBFD period, Each of the first PDCCH resource set and the second PDCCH resource set includes one or more search space sets.

6. The method according to claim 5, wherein: When transitioning from the non-SBFD period to the SBFD period, the PDCCH resource set monitored by the terminal is switched from the first PDCCH resource set to the second PDCCH resource set.

7. The method according to claim 6, wherein: Each of the non-SBFD period and the SBFD period is configured based on a time slot or a symbol, and the switching operation of the PDCCH resource set is performed based on a time slot.

8. The method according to claim 1, further comprising: receiving, from the base station, configuration information of a first PDCCH resource set associated with the non-SBFD period and configuration information of a second PDCCH resource set associated with the SBFD period; In a time slot n including the non-SBFD period and the SBFD period, performing a first monitoring operation on a PDCCH resource set determined from the first PDCCH resource set and the second PDCCH resource set according to a predefined criterion; as well as In a time slot n+1 including only the non-SBFD period, performing a second monitoring operation on the first PDCCH resource set, Wherein, n is a natural number.

9. The method according to claim 8, wherein: When the SBFD period in the time slot n includes M or more symbols, the one PDCCH resource set in the time slot n is determined as the second PDCCH resource set, and M is a natural number.

10. The method according to claim 9, wherein: When the duration of the control resource set (CORESET) belonging to the second PDCCH resource set includes L symbols, M is greater than or equal to L, and L is a natural number.

11. The method according to claim 8, wherein: When the non-SBFD period has a higher priority than the SBFD period, the one PDCCH resource set in the time slot n is determined as the first PDCCH resource set.

12. The method according to claim 1, further comprising: receiving, from the base station, configuration information of a CORESET, configuration information of a first frequency domain opportunity associated with the CORESET, and configuration information of a second frequency domain opportunity associated with the CORESET; performing a first monitoring operation on a first search space set formed based on the first frequency domain opportunity in the non-SBFD period; as well as A second monitoring operation is performed on a second search space set formed based on the second frequency domain opportunity within the SBFD period.

13. A method of a base station, comprising: transmitting time slot format information indicating a downlink (DL) period, a flexible (FL) period, and an uplink (UL) period to a terminal; transmitting UL subband information to the terminal; In response to a UL subband indicated by the UL subband information overlapping with a DL resource region in the DL period, regarding the DL resource region as a UL resource region; and Communicating with the terminal in a sub-band full duplex (SBFD) period and a non-SBFD period, wherein the SBFD period is a period in which the DL resource region overlapping the UL sub-band exists, and the non-SBFD period is a period in which the DL resource region overlapping the UL sub-band does not exist.

14. The method according to claim 13, wherein: When the UL subband overlaps with the FL resource region within the FL period, the FL resource region is regarded as a UL resource region, and the SBFD period includes a period in which the DL resource region overlaps with the UL subband and a period in which the FL resource region overlaps with the UL subband.

15. The method according to claim 13, further comprising: transmitting, to the terminal, configuration information of a first physical downlink control channel (PDCCH) resource set associated with the non-SBFD period and configuration information of a second PDCCH resource set associated with the SBFD period; as well as transmitting control information to the terminal in at least one of the first PDCCH resource set or the second PDCCH resource set, A first monitoring operation is performed on the first PDCCH resource set during the non-SBFD period, and a second monitoring operation is performed on the second PDCCH resource set during the SBFD period, and each of the first PDCCH resource set and the second PDCCH resource set includes one or more search space sets.

16. The method according to claim 13, further comprising: Transmitting configuration information of a first PDCCH resource set associated with the non-SBFD period and configuration information of a second PDCCH resource set associated with the SBFD period to the terminal; as well as transmitting, in a time slot n including the non-SBFD period and the SBFD period, control information in one PDCCH resource set determined from the first PDCCH resource set and the second PDCCH resource set according to a predefined criterion to the terminal, Wherein, n is a natural number.

17. The method according to claim 13, further comprising: Transmitting configuration information of a control resource set (CORESET), configuration information of a first frequency domain opportunity associated with the CORESET, and configuration information of a second frequency domain opportunity associated with the CORESET to the terminal; as well as Control information in at least one of a first search space set or a second search space set is transmitted to the terminal, wherein the first search space set is formed based on the first frequency domain opportunity during the non-SBFD period, and the second search space set is formed based on the second frequency domain opportunity during the SBFD period.

18. A terminal comprising at least one processor, in, The at least one processor causes the terminal to execute: receiving time slot format information from a base station; identifying a downlink (DL) period, a flexible (FL) period, and an uplink (UL) period based on the time slot format information; receiving UL subband information from the base station; and In response to a UL subband indicated by the UL subband information overlapping with a DL resource region in the DL period, treating the DL resource region as a UL resource region, The period in which the DL resource region overlaps with the UL subband is a sub-band full duplex (SBFD) period, and the period in which the DL resource region overlaps with the UL subband is a non-SBFD period.

19. The terminal according to claim 18, wherein: The at least one processor further causes the terminal to execute: receiving, from the base station, configuration information of a first physical downlink control channel (PDCCH) resource set associated with the non-SBFD period and configuration information of a second PDCCH resource set associated with the SBFD period; Performing a first monitoring operation on the first PDCCH resource set during the non-SBFD period; as well as performing a second monitoring operation on the second PDCCH resource set within the SBFD period, Each of the first PDCCH resource set and the second PDCCH resource set includes one or more search space sets.

20. The terminal according to claim 18, wherein: The at least one processor further causes the terminal to execute: receiving, from the base station, configuration information of a first PDCCH resource set associated with the non-SBFD period and configuration information of a second PDCCH resource set associated with the SBFD period; In a time slot n including the non-SBFD period and the SBFD period, performing a first monitoring operation on a PDCCH resource set determined from the first PDCCH resource set and the second PDCCH resource set according to a predefined criterion; as well as In a time slot n+1 including only the non-SBFD period, performing a second monitoring operation on the first PDCCH resource set, Wherein, n is a natural number.

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