Method and apparatus for receiving downlink data in wireless mobile communication system

Abstract

A method and an apparatus by which a terminal receives downlink data provide a method and an apparatus for separately processing downlink data between a symbol in which sub-band-based full duplex communication is configured and a legacy symbol.

Description

Method and device for receiving downlink data in a wireless mobile communication system

[0001] The present disclosure relates to a technology for receiving downlink data in a wireless mobile communication system.

[0002] TDD (Time Division Duplex) is a duplexing method widely used in commercial New Radio (NR) and 5G mobile communication systems. In TDD, time-slot radio resources are divided into downlink and uplink slots. Typically, downlink slots are distributed at a higher rate than uplink slots, depending on the distribution ratio of uplink to downlink traffic. However, this limitation of uplink slots negatively impacts coverage and latency. Full duplex has recently attracted attention as a technology to address these issues.

[0003] Additionally, as the number of terminals within a cell increases, beam-based communication technologies are being studied to provide efficient communication. Beam-based communication, which forms beams for specific terminals or groups of terminals, can provide efficient communication while reducing interference.

[0004] Beam-based communication can also be performed in a full-duplex environment, particularly when full-duplex is configured on a symbol or slot basis based on a subband. Furthermore, when duplex types vary on a symbol or slot basis, technology is needed to accurately receive and process downlink data according to the duplex type.

[0005] The present disclosure seeks to provide a technique for receiving downlink data when subband full-duplex communication is applied.

[0006] In one aspect, the present embodiments provide a method for a terminal to receive downlink data, comprising the steps of: receiving PDSCH (Physical Downlink Shared Channel) configuration information including TCI (transmission configuration index) state information from a base station; receiving a MAC information element including activation instruction information for indicating activation of TCI state information including QCL (Quasi-Colation) information; and confirming QCL (Quasi-Colation) information used for receiving downlink data using TCI state information indicated by downlink control information of a PDCCH (Physical Downlink Control Channel) for scheduling a PDSCH including downlink data information, wherein the QCL information used for receiving downlink data is separately set for a first type symbol in which subband-based full duplex communication is set and a second type symbol in which subband-based full duplex communication is not set.

[0007] In another aspect, the present embodiments provide a method for a base station to control reception of downlink data of a terminal, the method comprising: a step of transmitting PDSCH (Physical Downlink Shared Channel) configuration information including TCI (transmission configuration index) state information to the terminal; a step of transmitting a MAC information element including activation instruction information for instructing activation of TCI state information including QCL (Quasi-Colation) information to the terminal; a step of generating downlink control information indicating TCI state information used to confirm QCL (Quasi-Colation) information used by the terminal for receiving downlink data; and a step of transmitting the downlink control information to the terminal by including it in a PDCCH (Physical Downlink Control Channel) for scheduling a PDSCH including downlink data information, wherein the QCL information used for receiving downlink data is separately set for a first type symbol in which subband-based full duplex communication is set and a second type symbol in which subband-based full duplex communication is not set.

[0008] In another aspect, the present embodiments provide a terminal device for receiving downlink data, including a receiving unit for receiving PDSCH (Physical Downlink Shared Channel) configuration information including TCI (transmission configuration index) state information from a base station, and receiving a MAC information element including activation instruction information for indicating activation of TCI state information including QCL (Quasi-Colation) information, and a control unit for confirming QCL (Quasi-Colation) information used for receiving downlink data using TCI state information indicated by downlink control information of a PDCCH (Physical Downlink Control Channel) for scheduling a PDSCH including downlink data information, wherein the QCL information used for receiving downlink data is separately set for a first type symbol in which subband-based full duplex communication is set and a second type symbol in which subband-based full duplex communication is not set.

[0009] In another aspect, the present embodiments provide a base station device for controlling reception of downlink data of a terminal, the base station device including a transmitter for transmitting PDSCH (Physical Downlink Shared Channel) configuration information including TCI (transmission configuration index) state information to the terminal and transmitting a MAC information element including activation instruction information for instructing activation of TCI state information including QCL (Quasi-Colation) information to the terminal, and a control unit for generating downlink control information indicating TCI state information used to confirm QCL (Quasi-Colation) information used for receiving downlink data by the terminal, wherein the transmitter further transmits the downlink control information to the terminal by including it in a PDCCH (Physical Downlink Control Channel) for scheduling a PDSCH including downlink data information, and wherein the QCL information used for receiving downlink data is separately set for a first type symbol in which subband-based full duplex communication is set and a second type symbol in which subband-based full duplex communication is not set.

[0010] The present disclosure provides a technique for receiving downlink data in a symbol to which subband-based full-duplex communication is applied.

[0011] FIG. 1 is a schematic diagram illustrating the structure of an NR wireless communication system to which the present embodiment can be applied.

[0012] FIG. 2 is a drawing for explaining a frame structure in an NR system to which the present embodiment can be applied.

[0013] FIG. 3 is a diagram for explaining a resource grid supported by a wireless access technology to which the present embodiment can be applied.

[0014] FIG. 4 is a diagram for explaining a bandwidth part supported by a wireless access technology to which the present embodiment can be applied.

[0015] FIG. 5 is a diagram illustrating an example of a synchronization signal block in a wireless access technology to which the present embodiment can be applied.

[0016] FIG. 6 is a diagram for explaining a random access procedure in a wireless access technology to which the present embodiment can be applied.

[0017] Figure 7 is a drawing for explaining CORESET.

[0018] FIG. 8 is a diagram for explaining an example of a UL subband setting in an arbitrary DL slot to which the present embodiment can be applied.

[0019] FIG. 9 is a diagram for explaining an example in which a UL subband is set differently in any DL slot to which the present embodiment can be applied.

[0020] Fig. 10 is a drawing for explaining terminal operation according to one embodiment.

[0021] Fig. 11 is a diagram for explaining base station operation according to one embodiment.

[0022] Fig. 12 is a drawing showing the configuration of a terminal according to another embodiment.

[0023] Fig. 13 is a drawing showing the configuration of a base station according to another embodiment.

[0024] Hereinafter, some embodiments of the present disclosure will be described in detail with reference to exemplary drawings. When adding reference numerals to components in each drawing, identical components may have the same numerals as much as possible even if they are shown in different drawings. In addition, when describing the present embodiments, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the technical idea of ​​the present invention, the detailed description may be omitted. When "includes," "has," "consists of," etc. are used in this specification, other parts may be added unless "only" is used. When a component is expressed in the singular, it may include a case in which the plural is included unless specifically stated otherwise.

[0025] Additionally, terms such as first, second, A, B, (a), (b), etc. may be used to describe components of the present disclosure. These terms are only intended to distinguish the components from other components, and the nature, order, sequence, or number of the components are not limited by the terms.

[0026] In a description of the positional relationship of components, when it is described that two or more components are "connected," "combined," or "connected," it should be understood that the two or more components may be directly "connected," "combined," or "connected," but that the two or more components may also be further "interposed" with another component to be "connected," "combined," or "connected." Here, the other component may be included in one or more of the two or more components that are "connected," "combined," or "connected" to each other.

[0027] In the description of the temporal flow relationship related to components, operation methods, or manufacturing methods, for example, when the temporal or flow relationship is described as “after”, “following”, “next to”, “before”, etc., it may also include cases where it is not continuous, unless “immediately” or “directly” is used.

[0028] Meanwhile, when numerical values ​​or corresponding information (e.g., levels, etc.) for components are mentioned, even without separate explicit description, the numerical values ​​or corresponding information may be interpreted as including an error range that may occur due to various factors (e.g., process factors, internal or external impact, noise, etc.).

[0029] The wireless communication system in this specification refers to a system for providing various communication services such as voice, data packets, etc. using wireless resources, and may include a terminal, a base station, or a core network.

[0030] The embodiments disclosed below can be applied to wireless communication systems using various wireless access technologies. For example, the embodiments can be applied to various wireless access technologies such as CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), SC-FDMA (single carrier frequency division multiple access), or NOMA (non-orthogonal multiple access). In addition, the wireless access technology may not only refer to a specific access technology, but also to each generation of communication technologies established by various communication agreement organizations such as 3GPP, 3GPP2, WiFi, Bluetooth, IEEE, and ITU. For example, CDMA can be implemented with wireless technologies such as UTRA (universal terrestrial radio access) or CDMA2000. TDMA can be implemented with wireless technologies such as GSM (global system for mobile communications) / GPRS (general packet radio service) / EDGE (enhanced data rates for GSM evolution). OFDMA can be implemented in wireless technologies such as IEEE (Institute of Electrical and Electronics Engineers) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and E-UTRA (evolved UTRA). IEEE 802.16m is an evolution of IEEE 802.16e and provides backward compatibility with systems based on IEEE 802.16e.UTRA is part of UMTS (universal mobile telecommunications system). 3GPP (3rd generation partnership project) LTE (long term evolution) is part of E-UMTS (evolved UMTS) that uses E-UTRA (evolved-UMTSterrestrial radio access), employing OFDMA in the downlink and SC-FDMA in the uplink. Thus, the present embodiments can be applied to currently disclosed or commercialized wireless access technologies, as well as wireless access technologies currently under development or to be developed in the future.

[0031] Meanwhile, the term "terminal" in this specification is a comprehensive concept that refers to a device that includes a wireless communication module that performs communication with a base station in a wireless communication system, and should be interpreted as a concept that includes not only UE (User Equipment) in WCDMA, LTE, NR, HSPA, and IMT-2020 (5G or New Radio), but also MS (Mobile Station), UT (User Terminal), SS (Subscriber Station), and wireless device in GSM. In addition, the terminal may be a user portable device such as a smartphone depending on the usage type, and in a V2X communication system, it may mean a vehicle, a device including a wireless communication module in the vehicle, etc. In addition, in the case of a Machine Type Communication system, it may mean an MTC terminal, M2M terminal, URLLC terminal, etc. that is equipped with a communication module to perform machine type communication.

[0032] The base station or cell in this specification refers to an end that communicates with a terminal in terms of a network, and includes various coverage areas such as Node-B, eNB (evolved Node-B), gNB (gNode-B), LPN (Low Power Node), Sector, Site, various types of antennas, BTS (Base Transceiver System), Access Point, Point (e.g., Transmission Point, Reception Point, Transmission / Reception Point), Relay Node, Mega Cell, Macro Cell, Micro Cell, Pico Cell, Femto Cell, RRH (Remote Radio Head), RU (Radio Unit), and Small Cell. In addition, a cell may mean including a BWP (Bandwidth Part) in the frequency domain. For example, a serving cell may mean an Activation BWP of a terminal.

[0033] Since the various cells listed above have a base station that controls one or more cells, the base station can be interpreted in two meanings. 1) It can be a device itself that provides a mega cell, macro cell, micro cell, pico cell, femto cell, or small cell in relation to a wireless area, or 2) it can indicate the wireless area itself. In 1), all devices that provide a given wireless area are controlled by the same entity or that interact to cooperatively configure the wireless area are all indicated as a base station. Depending on how the wireless area is configured, a point, a transceiver point, a transmission point, a reception point, etc. can be an embodiment of a base station. In 2), the wireless area itself that receives or transmits a signal from the perspective of a user terminal or a neighboring base station can also be indicated as a base station.

[0034] In this specification, a cell may mean a component carrier having coverage of a signal transmitted from a transmission / reception point or a transmission / reception point itself.

[0035] Uplink (UL, or uplink) refers to a method of transmitting and receiving data from a terminal to a base station, and downlink (DL, or downlink) refers to a method of transmitting and receiving data from a base station to a terminal. Downlink may refer to communication or a communication path from multiple transmission / reception points to a terminal, and uplink may refer to communication or a communication path from a terminal to multiple transmission / reception points. In this case, in the downlink, the transmitter may be part of the multiple transmission / reception points, and the receiver may be part of the terminal. In addition, in the uplink, the transmitter may be part of the terminal, and the receiver may be part of the multiple transmission / reception points.

[0036] Uplink and downlink transmit and receive control information through control channels such as PDCCH (Physical Downlink Control CHannel) and PUCCH (Physical Uplink Control CHannel), and transmit and receive data by configuring data channels such as PDSCH (Physical Downlink Shared CHannel) and PUSCH (Physical Uplink Shared CHannel). Hereinafter, the situation in which signals are transmitted and received through channels such as PUCCH, PUSCH, PDCCH, and PDSCH is also expressed in the form of 'transmitting and receiving PUCCH, PUSCH, PDCCH, and PDSCH.'

[0037] For clarity of explanation, the technical idea of ​​this invention is described below mainly with reference to the 3GPP LTE / LTE-A / NR (New RAT) communication system, but the technical features of this invention are not limited to the communication system.

[0038] After researching 4G (4th-Generation) communication technology, 3GPP develops 5G (5th-Generation) communication technology to meet the requirements of the next-generation wireless access technology of the ITU-R. Specifically, 3GPP develops LTE-A pro, which is an enhancement of LTE-Advanced technology to meet the requirements of the ITU-R, as a 5G communication technology, and NR, a new communication technology separate from 4G communication technology. Both LTE-A pro and NR refer to 5G communication technology, and in the following, 5G communication technology will be explained with NR as the focus, unless a specific communication technology is specified.

[0039] The operating scenario in NR defines various operation scenarios by adding considerations for satellites, automobiles, and new verticals to the existing 4G LTE scenario, and in terms of service, it supports the eMBB (Enhanced Mobile Broadband) scenario, the mMTC (Massive Machine Communication) scenario that has high terminal density but is deployed over a wide area and requires low data rate and asynchronous access, and the URLLC (Ultra Reliability and Low Latency) scenario that requires high responsiveness and reliability and can support high-speed mobility.

[0040] To meet these scenarios, NR introduces a wireless communication system that incorporates new waveform and frame structure technologies, low latency technologies, support for ultra-high frequency bands (mmWave), and forward compatibility technologies. In particular, NR systems offer various technological changes in terms of flexibility to ensure forward compatibility. The key technical features of NR are described below with reference to the drawings.

[0041] <NR 시스템 일반>

[0042] Figure 1 is a schematic diagram illustrating the structure of an NR system to which the present embodiment can be applied.

[0043] Referring to Fig. 1, the NR system is divided into 5GC (5G Core Network) and NR-RAN parts, and the NG-RAN is composed of gNBs and ng-eNBs that provide user plane (SDAP / PDCP / RLC / MAC / PHY) and control plane (RRC) protocol termination for UE (User Equipment). gNBs or gNBs and ng-eNBs are interconnected via the Xn interface. gNBs and ng-eNBs are each connected to the 5GC via the NG interface. The 5GC can be configured to include an AMF (Access and Mobility Management Function) that is responsible for the control plane such as terminal access and mobility control functions, and an UPF (User Plane Function) that is responsible for the control function for user data. NR includes support for both frequency bands below 6 GHz (FR1, Frequency Range 1) and frequency bands above 6 GHz (FR2, Frequency Range 2).

[0044] gNB refers to a base station that provides NR user plane and control plane protocol termination to terminals, and ng-eNB refers to a base station that provides E-UTRA user plane and control plane protocol termination to terminals. The base station described in this specification should be understood to encompass both gNB and ng-eNB, and may also be used to refer to gNB or ng-eNB separately as needed.

[0045] <NR 웨이브 폼,뉴머롤러지 및 프레임 구조>

[0046] NR uses the CP-OFDM waveform with a cyclic prefix for downlink transmission, and CP-OFDM or DFT-s-OFDM for uplink transmission. OFDM technology is easily combined with MIMO (Multiple Input Multiple Output) and offers the advantages of high spectral efficiency and low-complexity receivers.

[0047] Meanwhile, in NR, the requirements for data rates, latency, and coverage differ across the three scenarios mentioned above. Therefore, it is necessary to efficiently satisfy these requirements across the frequency bands that comprise any NR system. To this end, technologies have been proposed to efficiently multiplex radio resources based on multiple different numerologies.

[0048] Specifically, the NR transmission numerator is determined based on the sub-carrier spacing and the cyclic prefix (CP), and is changed exponentially using the μ value as an exponent value of 2 based on 15 kHz, as shown in Table 1 below.

[0049] μsubcarrier intervalCyclic prefixSupported for dataSupported for synch015NormalYesYes130NormalYesYes260Normal, ExtendedYesNo3120NormalYesYes4240NormalNoYes

[0050] As shown in Table 1 above, the numerology of NR can be divided into five types according to the subcarrier spacing. This is different from the fixed 15 kHz subcarrier spacing of LTE, one of the 4G communication technologies. Specifically, the subcarrier spacing used for data transmission in NR is 15, 30, 60, and 120 kHz, and the subcarrier spacing used for synchronization signal transmission is 15, 30, 120, and 240 kHz. In addition, the extended CP is applied only to the 60 kHz subcarrier spacing. Meanwhile, the frame structure in NR is defined as a 10 ms frame consisting of 10 subframes of the same length of 1 ms. One frame can be divided into 5 ms half frames, and each half frame contains 5 subframes. In the case of a 15 kHz subcarrier spacing, one subframe consists of one slot, and each slot consists of 14 OFDM symbols. FIG. 2 is a diagram for explaining the frame structure in an NR system to which the present embodiment can be applied.

[0051] Referring to Fig. 2, a slot is fixedly composed of 14 OFDM symbols in the case of a normal CP, but the length of the slot in the time domain may vary depending on the subcarrier spacing. For example, in the case of a numerology with a 15 kHz subcarrier spacing, a slot is composed of 1 ms in length, which is the same length as a subframe. In contrast, in the case of a numerology with a 30 kHz subcarrier spacing, a slot is composed of 14 OFDM symbols, but two slots may be included in one subframe with a length of 0.5 ms. In other words, subframes and frames are defined with fixed time lengths, while slots are defined by the number of symbols, and their time lengths may vary depending on the subcarrier spacing.

[0052] Meanwhile, NR defines slots as the basic scheduling unit and also introduces mini-slots (or sub-slots, or non-slot-based scheduling) to reduce transmission delay in the wireless section. Using wider subcarrier spacing reduces transmission delay in the wireless section by shortening the length of each slot inversely. Mini-slots (or sub-slots) are designed to efficiently support URLLC scenarios and allow scheduling in units of 2, 4, or 7 symbols.

[0053] Furthermore, unlike LTE, NR defines uplink and downlink resource allocation at the symbol level within a single slot. To reduce HARQ delay, a slot structure was defined that allows HARQ ACK / NACK to be transmitted directly within the transmission slot. This slot structure is referred to as a self-contained structure and will be described in detail.

[0054] NR is designed to support a total of 256 slot formats, of which 62 are used in 3GPP Rel-15. It also supports a common frame structure that configures FDD or TDD frames through various combinations of slots. For example, it supports a slot structure in which all symbols in a slot are set to downlink, a slot structure in which all symbols are set to uplink, and a slot structure in which downlink and uplink symbols are combined. NR also supports data transmission being distributed and scheduled across one or more slots. Therefore, a base station can use a slot format indicator (SFI) to inform a UE whether a slot is a downlink slot, an uplink slot, or a flexible slot. The base station can indicate the slot format by indicating an index of a table configured through UE-specific RRC signaling using the SFI, and can also indicate it dynamically through DCI (Downlink Control Information) or statically or semi-statically through RRC.

[0055] <NR 물리 자원 >

[0056] In relation to physical resources in NR, antenna ports, resource grids, resource elements, resource blocks, and bandwidth parts are considered.

[0057] Antenna ports are defined such that the channel through which a symbol on an antenna port is carried can be inferred from the channel through which another symbol on the same antenna port is carried. Two antenna ports are said to be quasi co-located (QC / QCL) if the large-scale properties of the channel through which a symbol on one antenna port is carried can be inferred from the channel through which a symbol on the other antenna port is carried. Here, the large-scale properties include one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.

[0058] FIG. 3 is a diagram for explaining a resource grid supported by a wireless access technology to which the present embodiment can be applied.

[0059] Referring to Figure 3, a resource grid may exist for each numeral, as NR supports multiple numerals on the same carrier. Furthermore, resource grids may exist based on antenna ports, subcarrier spacing, and transmission direction.

[0060] A resource block (RB) consists of 12 subcarriers and is defined solely in the frequency domain. Furthermore, a resource element (RE) consists of one OFDM symbol and one subcarrier. Therefore, as shown in Figure 3, the size of a single RB can vary depending on the subcarrier spacing. NR also defines "Point A," which serves as a common reference point for the RB grid, as well as common RBs and virtual RBs.

[0061] FIG. 4 is a diagram for explaining a bandwidth part supported by a wireless access technology to which the present embodiment can be applied.

[0062] Unlike LTE, where the carrier bandwidth is fixed at 20 MHz, NR sets the maximum carrier bandwidth from 50 MHz to 400 MHz for each subcarrier interval. Therefore, it is not assumed that all terminals will use the entire carrier bandwidth. Accordingly, NR allows terminals to designate bandwidth parts (BWPs) within the carrier bandwidth, as illustrated in Figure 4. Furthermore, bandwidth parts are associated with a single numerology, consist of a subset of consecutive common resource blocks, and can be dynamically activated over time. Each terminal is configured with up to four bandwidth parts for both the uplink and downlink, and data is transmitted and received using the bandwidth parts activated at a given time.

[0063] In the case of a paired spectrum, the uplink and downlink bandwidth parts are set independently, and in the case of an unpaired spectrum, the downlink and uplink bandwidth parts are set in pairs so that they can share a center frequency to prevent unnecessary frequency re-tuning between downlink and uplink operations.

[0064] <NR 초기 접속>

[0065] In NR, a terminal performs cell search and random access procedures to connect to a base station and perform communication.

[0066] Cell search is a procedure in which a terminal synchronizes to the cell of a corresponding base station, obtains a physical layer cell ID, and obtains system information using a synchronization signal block (SSB) transmitted by the base station.

[0067] FIG. 5 is a diagram illustrating an example of a synchronization signal block in a wireless access technology to which the present embodiment can be applied.

[0068] Referring to FIG. 5, SSB is composed of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), each occupying 1 symbol and 127 subcarriers, and a PBCH spanning 3 OFDM symbols and 240 subcarriers.

[0069] The terminal receives SSB by monitoring SSB in the time and frequency domain.

[0070] SSB can be transmitted up to 64 times in 5ms. Multiple SSBs are transmitted in different transmission beams within 5ms, and the terminal performs detection assuming that SSBs are transmitted every 20ms based on a specific beam used for transmission. The number of beams that can be used for SSB transmission within 5ms can increase as the frequency band increases. For example, up to 4 SSB beams can be transmitted below 3GHz, up to 8 in the frequency band between 3GHz and 6GHz, and up to 64 different beams can be used for SSB transmission in the frequency band above 6GHz.

[0071] SSB contains two symbols in one slot, and the starting symbol and number of repetitions within the slot are determined as follows depending on the subcarrier spacing.

[0072] Meanwhile, unlike SS in conventional LTE, SSB is not transmitted at the center frequency of the carrier bandwidth. This means that SSB can be transmitted even in locations other than the center of the system bandwidth, and when supporting wideband operation, multiple SSBs can be transmitted in the frequency domain. Accordingly, the terminal monitors SSB using the synchronization raster, which is a candidate frequency location for monitoring SSB. The carrier raster, which is the center frequency location information of the channel for initial access, and the synchronization raster are newly defined in NR. The synchronization raster has a wider frequency interval than the carrier raster, which can support the terminal's fast SSB search.

[0073] A UE can obtain the MIB through the PBCH of the SSB. The MIB (Master Information Block) includes the minimum information required for the UE to receive the remaining system information (RMSI, Remaining Minimum System Information) broadcast by the network. In addition, the PBCH may include information on the position of the first DM-RS symbol in the time domain, information for the UE to monitor SIB1 (e.g., SIB1 numerology information, information related to SIB1 CORESET, search space information, PDCCH-related parameter information, etc.), offset information between the common resource block and the SSB (the absolute position of the SSB within the carrier is transmitted through SIB1), etc. Here, the SIB1 numerology information is also applied equally to some messages used in the random access procedure for the UE to access the base station after completing the cell search procedure. For example, the numerology information of SIB1 may be applied to at least one of messages 1 to 4 for the random access procedure.

[0074] The aforementioned RMSI may refer to SIB1 (System Information Block 1), and SIB1 is broadcast periodically (e.g., every 160 ms) in the cell. SIB1 contains information necessary for the UE to perform the initial random access procedure and is periodically transmitted via PDSCH. In order for the UE to receive SIB1, it must receive numerology information used for SIB1 transmission and CORESET (Control Resource Set) information used for SIB1 scheduling via PBCH. The UE checks scheduling information for SIB1 using SI-RNTI in CORESET and acquires SIB1 on PDSCH according to the scheduling information. The remaining SIBs, excluding SIB1, may be transmitted periodically or upon request of the UE.

[0075] FIG. 6 is a diagram for explaining a random access procedure in a wireless access technology to which the present embodiment can be applied.

[0076] Referring to FIG. 6, once cell search is complete, the terminal transmits a random access preamble for random access to the base station. The random access preamble is transmitted via the PRACH. Specifically, the random access preamble is transmitted to the base station via the PRACH, which consists of consecutive radio resources in a specific slot that is periodically repeated. Generally, when a terminal initially accesses a cell, a contention-based random access procedure is performed, and when performing random access for beam failure recovery (BFR), a non-contention-based random access procedure is performed.

[0077] The terminal receives a random access response to the transmitted random access preamble. The random access response may include a random access preamble identifier (ID), an UL Grant (uplink radio resource), a temporary C-RNTI (Temporary Cell - Radio Network Temporary Identifier), and a TAC (Time Alignment Command). Since one random access response may include random access response information for one or more terminals, the random access preamble identifier may be included to indicate which terminal the included UL Grant, temporary C-RNTI, and TAC are valid for. The random access preamble identifier may be an identifier for the random access preamble received by the base station. The TAC may be included as information for the terminal to adjust uplink synchronization. The random access response may be indicated by a random access identifier on the PDCCH, i.e., an RA-RNTI (Random Access - Radio Network Temporary Identifier).

[0078] Upon receiving a valid random access response, the terminal processes the information contained in the random access response and performs scheduled transmission to the base station. For example, the terminal applies TAC and stores a temporary C-RNTI. Furthermore, using the UL Grant, the terminal transmits data stored in its buffer or newly generated data to the base station. In this case, information that identifies the terminal must be included.

[0079] Finally, the terminal receives a downlink message for contention resolution.

[0080] <NR CORESET>

[0081] The downlink control channel in NR is transmitted in a CORESET (Control Resource Set) with a length of 1 to 3 symbols, and transmits uplink / downlink scheduling information, SFI (Slot format Index), and TPC (Transmit Power Control) information.

[0082] To ensure system flexibility, NR introduced the CORESET concept. CORESET (Control Resource Set) refers to time-frequency resources for downlink control signals. A terminal can decode control channel candidates using one or more search spaces within the CORESET time-frequency resources. A QCL (Quasi CoLocation) assumption is established for each CORESET, which is used to inform the characteristics of analog beam direction in addition to the delay spread, Doppler spread, Doppler shift, and average delay assumed by the conventional QCL.

[0083] Figure 7 is a drawing for explaining CORESET.

[0084] Referring to Figure 7, a CORESET can exist in various forms within the carrier bandwidth within a single slot, and in the time domain, a CORESET can consist of up to three OFDM symbols. In addition, a CORESET is defined as a multiple of six resource blocks up to the carrier bandwidth in the frequency domain.

[0085] The first CORESET is indicated via the MIB as part of the initial bandwidth part configuration, allowing the terminal to receive additional configuration and system information from the network. After establishing a connection with the base station, the terminal can receive and configure one or more CORESET information via RRC signaling.

[0086] In this specification, the terms frequency, frame, subframe, resource, resource block, region, band, subband, control channel, data channel, synchronization signal, various reference signals, various signals or various messages related to NR (New Radio) may be interpreted in the past or present meaning or in various meanings used in the future.

[0087] The present disclosure proposes a technology for a terminal supporting full-duplex communication to receive downlink data. For example, the present disclosure proposes a method for controlling transmission and reception beams between a terminal supporting full-duplex communication and a base station. In particular, the present disclosure proposes a method for setting and indicating a Transmission Configuration Indication (TCI) for controlling the transmission and reception beams of a downlink data channel, the PDSCH.

[0088] TDD (Time Division Duplex) is a duplexing method widely used in commercial New Radio (NR) and 5G mobile communication systems. In TDD, time-slot radio resources are divided into downlink and uplink slots. Typically, downlink slots are distributed at a higher rate than uplink slots, depending on the distribution ratio of uplink to downlink traffic. However, this limitation of uplink slots negatively impacts coverage and latency. Full duplex has recently attracted attention as a technology to address these issues.

[0089] Full duplex is a technology that simultaneously performs transmission and reception using the same time and frequency resources. Generally, simultaneous DL transmission and UL reception are being considered from the base station (gNB in ​​the case of 5G). However, this is not limited to this, and simultaneous DL reception and UL transmission can also be performed from the terminal side. In other words, both the base station and the terminal can support full duplex. However, unlike the base station, which is structurally prone to self-interference cancellation, the DL reception performance of the terminal is easily affected by self-interference of the UL transmission signal. Therefore, the case where the base station operates in full duplex and the terminal operates in half duplex is generally considered. Additionally, from the base station's perspective, to reduce the impact of self-interference, a subband non-overlapping full duplex method can be primarily considered, which performs DL transmission and UL reception simultaneously while distinguishing the frequency resources for DL ​​and UL transmission and reception.

[0090] FIG. 8 is a diagram for explaining an example of a UL subband setting in an arbitrary DL slot to which the present embodiment can be applied.

[0091] FIG. 9 is a diagram for explaining an example in which a UL subband is set differently in any DL slot to which the present embodiment can be applied.

[0092] Referring to FIGS. 8 and 9, a TDD configuration can be achieved in which DL slots and UL slots are arranged in a ratio of 4:1 in any NR frequency band (however, some symbols of the last DL slot are special slots containing flexible symbols for DL / UL transition). In this case, a UL subband can be set to support UL transmission of a terminal in some (or all) of the DL slots.

[0093] For example, when a UL subband is configured for a random DL slot, the UL subband may be configured at the center of the corresponding frequency band, as shown in FIG. 8. Alternatively, the UL subband may be configured at the edge of the corresponding frequency band, as shown in FIG. 9. A guard band may be configured between the UL subband and the DL subband in the corresponding slot. Additionally, frequency resources other than the UL subband and the guard band may be utilized as DL subbands for DL ​​transmission and reception based on existing slot / symbol configuration information.

[0094] That is, when the UL subband is set around the center of the frequency band as in Fig. 8, two guard bands are configured, one each above and below the UL subband. Similarly, two DL subbands can be configured, one each above and below the UL subband. Alternatively, when the UL subband is set around the edge of the frequency band as in Fig. 9, one guard band and one DL subband can be configured following the UL subband.

[0095] The UL-DL slot configuration defined in NR is defined to be performed on a cell-by-cell basis through cell-specific RRC signaling. That is, the pattern of DL symbols, UL symbols, and flexible symbols for a certain period is set through the RRC message 'tdd-UL-DL-ConfigurationCommon' for the corresponding UL-DL slot configuration. Additionally, only the flexible symbols set through the above 'tdd-UL-DL-ConfigurationCommon' can be reallocated to UL symbols, DL symbols, or flexible symbols for each UE through the UE-specific RRC signaling 'tdd-UL-DL-ConfigurationDedicated'. Alternatively, a method for indicating a dynamic slot format through the UE-group common PDCCH is also defined. For this purpose, NR also supports a method for indicating a dynamic slot format through DCI format 2_0.

[0096] According to the existing slot configuration method described above, any one symbol can be set or indicated as one of DL, UL, or Flexible. That is, FIGS. 8 and 9 are examples in which an arbitrary slot format is set to DDDSU through the existing slot configuration. D refers to a downlink slot, meaning that all OFDM symbols constituting the slot are set to DL. U refers to an uplink slot, meaning that all OFDM symbols constituting the slot are set to UL. S refers to a special slot, meaning a slot that includes a flexible symbol for DL / UL transition. Typically, in the case of a normal CP, the special slot can be configured with 12 DL symbols and 2 flexible symbols out of a total of 14 symbols. Alternatively, it can be configured with 10 DL symbols, 2 flexible symbols, and 2 UL symbols. That is, within any one TDD carrier, one symbol is configured or indicated as only one of DL, UL, or flexible.

[0097] However, if a UL subband is configured in any DL slot, DL transmission or UL transmission may occur simultaneously for each frequency resource in the symbol. In this specification, a DL slot or symbol including a UL subband or a UL slot or symbol including a DL subband is referred to as an SBFD (Subband Full Duplex) slot or SBFD (Subband Full Duplex) symbol. However, this is for convenience of explanation and is not limited to the term.

[0098] In addition, in this specification, a slot composed only of the SBFD symbols is referred to as an SBFD slot, and a slot composed only of symbols according to existing symbol settings (i.e., a slot composed only of symbols that do not include a UL subband, a DL subband, and a guardband) is referred to as a non-SBFD slot. Alternatively, a slot including at least one SBFD symbol may be referred to as an SBFD slot. As mentioned above, this is for convenience of explanation and is not limited to the terminology.

[0099]

[0100] Fig. 10 is a drawing for explaining terminal operation according to one embodiment.

[0101] Referring to FIG. 10, a method (S1000) for a terminal to receive downlink data may include a step of receiving PDSCH (Physical Downlink Shared Channel) configuration information including TCI (transmission configuration index) state information from a base station (S1010).

[0102] For example, a terminal can receive PDSCH configuration information for PDSCH reception from a base station through a higher layer message. The PDSCH configuration information can include one or more pieces of TCI state information. For example, the TCI state information can include TCI state ID information and QCL information for identifying the corresponding TCI state. The QCL information can include at least one of serving cell index information, BWP ID information, reference signal information, and QCL type information.

[0103] Meanwhile, the terminal may receive slot configuration information from the base station. The slot configuration information may include information for configuring each slot or symbol for downlink, uplink, or special in a TDD environment. Furthermore, the slot configuration information may also include information regarding whether each slot or symbol is configured for subband-based full-duplex communication.

[0104] The symbols used for receiving downlink data can be divided into a first type symbol in which subband-based full duplex communication is established and a second type symbol in which the subband-based full duplex communication is not established. In addition, the slots used for receiving downlink data can be divided into a first type slot in which subband-based full duplex communication is established and a second type slot in which the subband-based full duplex communication is not established.

[0105] Accordingly, the terminal can apply differentiated QCL information depending on whether the symbol in which the PDSCH is received is a type 1 symbol or a type 2 symbol. To this end, it is necessary to receive differentiated QCL information for each type of symbol.

[0106] For example, the PDSCH configuration information may include first PDSCH configuration information including first type QCL information set for a first type symbol and second PDSCH configuration information including second type QCL information set for a second type symbol. That is, the first type QCL information for the first type symbol and the second type QCL information for the second type symbol may be included as sub-information elements or fields of different PDSCH configuration information.

[0107] As another example, the TCI state information may be divided into first TCI state information including first type QCL information set for a first type symbol and second TCI state information including second type QCL information set for a second type symbol. That is, the first type QCL information and the second type QCL information may be included in the same PDSCH configuration information (PDSCH-config), but may be distinguished by being included in different TCI state information. In this case, an indicator for distinguishing the TCI state may be included.

[0108] As another example, the TCI state information may include Type 1 QCL information configured for Type 1 symbols and Type 2 QCL information configured for Type 2 symbols, respectively. That is, Type 1 QCL information and Type 2 QCL information may be included in the same TCI state separately. In this case, an indicator for distinguishing the QCL information may be included. In addition, Type 1 QCL information and Type 2 QCL information may be paired and included in the TCI state information. That is, Type 1 QCL information and Type 2 QCL information may be paired and included in one TCI state information. In this case, even if one TCI state is specified to be used, Type 1 QCL and Type 2 QCL information may be selected and applied depending on the type of symbol in which the PDSCH is received.

[0109] In addition, the first type QCL information and the second type QCL information can be distinguished in various ways and received by the terminal.

[0110] A method for a terminal to receive downlink data (S1000) may include a step of receiving a MAC information element including activation instruction information for indicating activation of TCI state information including QCL (Quasi-Colation) information (S1020).

[0111] For example, activation indication information can be included in a MAC information element (MAC CE) and received by the terminal. The activation indication information can include indication information for indicating a specific TCI state information among the TCI state information included in the PDSCH configuration information to be activated. For example, the PDSCH configuration information includes 16 TCI state information, and the MAC CE can indicate up to 8 of these TCI state information to be activated. This can be explained below by describing it as a codepoint.

[0112] Meanwhile, as explained above, QCL information can also be differentiated based on the type of each symbol. Accordingly, the activation instruction information indicated through the MAC CE can also be configured in various ways.

[0113] For example, the MAC information element may be divided into a first MAC information element for activating first TCI state information used for PDSCH reception through a first type symbol and a second MAC information element for activating second TCI state information used for PDSCH reception through a second type symbol. For example, in the case where TCI state information is divided according to the symbol type, the MAC CEs for activating each of the first TCI state information and the second TCI state information may be defined as different MAC CEs. In this case, the TCI state information may be included in the same PDSCH configuration information or may be included in different PDSCH configuration information.

[0114] As another example, the MAC information element may include both a field for activating the first TCI state information used for PDSCH reception via the first type symbol and a field for activating the second TCI state information used for PDSCH reception via the second type symbol. For example, activation indication information may be indicated via one MAC information element, but each field may be distinguished such that the field for activating the first TCI state information and the field for activating the second TCI state information are distinguished. In this case, the TCI state information may be included in the same PDSCH configuration information or may be included in different PDSCH configuration information.

[0115] The terminal can set up to 8 TCI state information to the activated state (specified by codepoint) according to the activation instruction information.

[0116] A method (S1000) for a terminal to receive downlink data may include a step of checking QCL (Quasi-Colation) information used for receiving downlink data by using TCI state information indicated by downlink control information of a PDCCH (Physical Downlink Control Channel) for scheduling a PDSCH including downlink data information (S1030).

[0117] The QCL information used for receiving downlink data is separately set for the first type symbol in which subband-based full duplex communication is set and the second type symbol in which subband-based full duplex communication is not set.

[0118] For example, a terminal may receive a PDCCH that schedules a PDSCH to receive downlink data information via the PDSCH. The PDCCH includes downlink control information, and various information may be included in the downlink control information depending on the PDCCH format. In particular, the downlink control information may include a field value indicating TCI state information applied for PDSCH reception.

[0119] The field value for indicating TCI state information can indicate at least one TCI state information among up to eight TCI state information indicated by the activation indication information. However, as in the present disclosure, when full-duplex communication is established in the symbol for the terminal to receive PDSCH and there are type 1 and type 2 symbols, it is necessary to apply QCL information separately. Therefore, the TCI state information indicated by the downlink control information also needs to be confirmed by considering the symbol type.

[0120] For example, the value of the TCI field may indicate different TCI state information depending on whether the symbol on which the PDSCH is received is of the first type or the second type. For example, if the value of the TCI field is included as a specific value, it may be implicitly interpreted as indicating first TCI state information including first type QCL information when the symbol on which the PDSCH is received is a first type symbol. Similarly, if the value of the TCI field is included as the same specific value, it may be implicitly interpreted as indicating second TCI state information including second type QCL information when the symbol on which the PDSCH is received is a second type symbol.

[0121] As another example, if the value of the TCI field is included as a specific value, the TCI state information may include type 1 QCL information and type 2 QCL information. In this case, the terminal may apply type 1 QCL information when the symbol in which the PDSCH is received is a type 1 symbol, and may apply type 2 QCL information when it is a type 2 symbol.

[0122] Through this operation, terminals equipped with subband-based full-duplex communication can distinguish between symbols equipped with and without subband-based full-duplex communication and apply appropriate QCL information. Consequently, more efficient and accurate reception of downlink data information is possible.

[0123] Fig. 11 is a diagram for explaining base station operation according to one embodiment.

[0124] Referring to FIG. 11, a method (S1100) for a base station to control reception of downlink data of a terminal may include a step of transmitting PDSCH (Physical Downlink Shared Channel) configuration information including TCI (transmission configuration index) state information to the terminal (S1110).

[0125] For example, a base station can transmit PDSCH configuration information to a terminal through a higher layer message (e.g., RRC message). The PDSCH configuration information can include one or more pieces of TCI state information. For example, the TCI state information can include TCI state ID information and QCL information for identifying the corresponding TCI state. The QCL information can include at least one of serving cell index information, BWP ID information, reference signal information, and QCL type information.

[0126] Meanwhile, the base station may transmit slot configuration information to the terminal. This slot configuration information may include information for configuring each slot or symbol for downlink, uplink, or special in a TDD environment. Furthermore, this slot configuration information may also include information regarding whether each slot or symbol is configured for subband-based full-duplex communication.

[0127] The symbols used for downlink data transmission and reception can be divided into a first type symbol in which subband-based full duplex communication is established and a second type symbol in which the subband-based full duplex communication is not established. In addition, the slots used for downlink data transmission and reception can be divided into a first type slot in which subband-based full duplex communication is established and a second type slot in which the subband-based full duplex communication is not established.

[0128] Accordingly, the base station can be configured to apply differentiated QCL information depending on whether the symbol transmitting the PDSCH is a type 1 symbol or a type 2 symbol. To this end, differentiated QCL information needs to be transmitted for each type of symbol.

[0129] For example, the PDSCH configuration information may include first PDSCH configuration information including first type QCL information set for a first type symbol and second PDSCH configuration information including second type QCL information set for a second type symbol. That is, the first type QCL information for the first type symbol and the second type QCL information for the second type symbol may be included as sub-information elements or fields of different PDSCH configuration information.

[0130] As another example, the TCI state information may be divided into first TCI state information including first type QCL information set for a first type symbol and second TCI state information including second type QCL information set for a second type symbol. That is, the first type QCL information and the second type QCL information may be included in the same PDSCH configuration information (PDSCH-config), but may be distinguished by being included in different TCI state information. In this case, an indicator for distinguishing the TCI state may be included.

[0131] As another example, the TCI state information may include Type 1 QCL information configured for Type 1 symbols and Type 2 QCL information configured for Type 2 symbols, respectively. That is, Type 1 QCL information and Type 2 QCL information may be included in the same TCI state separately. In this case, an indicator for distinguishing the QCL information may be included. In addition, Type 1 QCL information and Type 2 QCL information may be paired and included in the TCI state information. That is, Type 1 QCL information and Type 2 QCL information may be paired and included in one TCI state information. In this case, even if one TCI state is specified to be used, Type 1 QCL and Type 2 QCL information may be selected and applied depending on the type of symbol in which the PDSCH is received.

[0132] In addition, the first type QCL information and the second type QCL information can be distinguished and transmitted in various ways.

[0133] A method (S1100) for a base station to control reception of downlink data of a terminal may include a step of transmitting a MAC information element including activation instruction information for instructing activation of TCI state information including QCL (Quasi-Colation) information to the terminal (S1120).

[0134] For example, activation indication information can be included in a MAC information element (MAC CE) and transmitted to the terminal. The activation indication information can include indication information for indicating a specific TCI state information among the TCI state information included in the PDSCH configuration information to be activated. For example, if the PDSCH configuration information includes 16 TCI state information, the MAC CE can indicate up to 8 of these TCI state information to be activated.

[0135] Meanwhile, as explained above, QCL information can also be differentiated based on the type of each symbol. Accordingly, the activation instruction information indicated through the MAC CE can also be configured in various ways.

[0136] For example, the MAC information element may be divided into a first MAC information element for activating first TCI state information used for PDSCH reception through a first type symbol and a second MAC information element for activating second TCI state information used for PDSCH reception through a second type symbol. For example, in the case where TCI state information is divided according to the symbol type, the MAC CEs for activating each of the first TCI state information and the second TCI state information may be defined as different MAC CEs. In this case, the TCI state information may be included in the same PDSCH configuration information or may be included in different PDSCH configuration information.

[0137] As another example, the MAC information element may include both a field for activating the first TCI state information used for PDSCH reception via the first type symbol and a field for activating the second TCI state information used for PDSCH reception via the second type symbol. For example, activation indication information may be indicated via one MAC information element, but each field may be distinguished such that the field for activating the first TCI state information and the field for activating the second TCI state information are distinguished. In this case, the TCI state information may be included in the same PDSCH configuration information or may be included in different PDSCH configuration information.

[0138] The terminal can set up to 8 TCI state information to the activated state (specified by codepoint) according to the activation instruction information.

[0139] A method (S1100) for a base station to control reception of downlink data of a terminal may include a step of generating downlink control information (Downlink Control Information) indicating TCI state information used to confirm QCL (Quasi-Colation) information used for reception of downlink data by the terminal (S1130).

[0140] A method (S1100) for a base station to control reception of downlink data of a terminal may include a step of including downlink control information in a PDCCH (Physical Downlink Control Channel) for scheduling a PDSCH including downlink data information and transmitting the same to the terminal (S1140).

[0141] QCL information used for receiving downlink data can be separately set for a first type symbol in which subband-based full duplex communication is set and a second type symbol in which subband-based full duplex communication is not set.

[0142] For example, a base station may transmit a PDCCH that schedules the PDSCH for downlink data information transmission via the PDSCH. The PDCCH includes downlink control information, and various information may be included in the downlink control information depending on the PDCCH format. In particular, the downlink control information may include a field value indicating TCI state information applied for PDSCH reception.

[0143] The field value for indicating TCI state information can indicate at least one TCI state information among up to eight TCI state information indicated by the activation indication information. However, as in the present disclosure, when full-duplex communication is established in the symbol for the terminal to receive PDSCH and there are type 1 and type 2 symbols, it is necessary to apply QCL information separately. Therefore, the TCI state information indicated by the downlink control information also needs to be confirmed by considering the symbol type.

[0144] For example, the value of the TCI field may indicate different TCI state information depending on whether the symbol on which the PDSCH is received is of the first type or the second type. For example, if the value of the TCI field is included as a specific value, it may be set to indicate first TCI state information including first type QCL information when the symbol on which the PDSCH is received is a first type symbol. Similarly, if the value of the TCI field is included as the same specific value, it may be set to indicate second TCI state information including second type QCL information when the symbol on which the PDSCH is received is a second type symbol.

[0145] As another example, if the value of the TCI field is included as a specific value, the TCI state information may include type 1 QCL information and type 2 QCL information. In this case, the terminal may apply type 1 QCL information when the symbol in which the PDSCH is received is a type 1 symbol, and may apply type 2 QCL information when it is a type 2 symbol.

[0146] Through this operation, terminals equipped with subband-based full-duplex communication can distinguish between symbols equipped with and without subband-based full-duplex communication and apply appropriate QCL information. Consequently, more efficient and accurate reception of downlink data information is possible.

[0147]

[0148] Hereinafter, more specific embodiments of the operations of the aforementioned terminal and base station will be described. In the case where any PDSCH transmission is performed via an SBFD symbol, an embodiment of setting and activating a separate QCL is described to distinguish it from the PDSCH transmission performed via the existing non-SBFD symbol. The SBFD symbol below refers to a first type symbol, and the non-SBFD symbol refers to a second type symbol. In addition, for the convenience of explanation, the description is mainly based on symbols, but the same can be applied to slots. For example, an SBFD symbol can be applied by being replaced with an SBFD slot. Similarly, a non-SBFD symbol can be applied by being replaced with a non-SBFD slot.

[0149] Below, a detailed embodiment is proposed for receiving TCI state information for receiving PDSCH from a terminal from a base station and thereby obtaining QCL (Quasi-Colocation) information for PDSCH reception.

[0150] For example, a TCI state can be distinguished and set and / or indicated based on the type of symbol through which a PDSCH is transmitted from a base station to an arbitrary terminal, i.e., whether the PDSCH transmission symbol corresponds to an SBFD symbol or a non-SBFD symbol. In addition, the TCI state set and / or indicated by the base station can be distinguished and interpreted and applied based on the type of symbol through which a PDSCH is received by a terminal, i.e., whether the PDSCH reception symbol corresponds to an SBFD symbol or a non-SBFD symbol.

[0151] Hereinafter, "the terminal receives configuration information or instruction information from the base station" includes the operation of the base station transmitting the corresponding configuration information or instruction information to the terminal. Conversely, "the base station sets or instructs arbitrary information" includes the operation of the terminal receiving the corresponding configuration information or instruction information.

[0152] Specifically, the terminal receives at least one TCI state configuration information for PDSCH reception from the base station via RRC signaling. Each TCI state information includes TCI state ID information and QCL information (serving cell index, BWP ID, reference signal, QCL type, etc.) for identifying the corresponding TCI state. Based on the one or more configured TCI state configuration information, the terminal receives code point activation information for up to eight TCI states from the base station via MAC CE signaling. Accordingly, when the terminal receives a DCI format (e.g., DCI format 1_1, DCI format 1_2, etc.) including any PDSCH scheduling control information, the terminal obtains QCL information for corresponding PDSCH reception based on the code point indicated through the TCI field included in the corresponding DCI format. At this time, as described above, depending on the type of symbol through which PDSCH reception is performed based on the corresponding DCI format, i.e., whether the corresponding PDSCH reception symbol is an SBFD symbol or a non-SBFD symbol, the terminal can distinguish and interpret the TCI state and QCL information corresponding to the code point indicated through the TCI field of the DCI format.

[0153] As one method for this, when the base station sets TCI state information for PDSCH reception of the terminal, the TCI state information for the PDSCH transmitted through a separate SBFD symbol may be set separately from the TCI state information for the PDSCH transmitted through the existing legacy symbol type, i.e., the non-SBFD symbol. For example, any TCI state information may include QCL information (serving cell index, BWP ID, reference signal, QCL type, etc.) for the non-SBFD symbol and QCL information (serving cell index, BWP ID, reference signal, QCL type, etc.) for the SBFD symbol, respectively. That is, any TCI state configuration information may include at least one QCL information pair for the SBFD symbol together with at least one QCL information for the non-SBFD symbol. In this case, the QCL information may include symbol type / type configuration information (i.e., configuration information for indicating whether it is QCL information for the SBFD symbol or QCL information for the non-SBFD symbol). In addition, when setting the reference signal information included in the QCL information, if the corresponding QCL information is QCL information for an SBFD symbol, the corresponding reference signal may also be limited to SSB or CSI-RS transmitted through an SBFD symbol, and conversely, if the corresponding QCL information is QCL information for a non-SBFD symbol, the corresponding reference signal may also be limited to SSB or CSI-RS transmitted through a non-SBFD symbol.

[0154] Based on the above TCI state setting, the base station activates code point information for at least one TCI state through MAC CE signaling. When the terminal acquires QCL information for receiving any PDSCH, if all PDSCH reception symbols according to PDSCH time resource allocation information (TDRA, Time Domain Resource Assignment field) of the DCI format are non-SBFD symbols, the terminal applies QCL information for the non-SBFD symbols among the QCL information of the TCI state corresponding to the code point by the TCI field. Conversely, if all PDSCH reception symbols according to PDSCH time resource allocation information of the DCI format are SBFD symbols, the terminal applies QCL information for the SBFD symbols among the QCL information of the TCI state corresponding to the code point by the TCI field of the DCI format.

[0155] Or, when setting a downlink reference signal for any terminal supporting SBFD operation at a base station, at least one downlink reference signal setting includes both non-SBFD symbols and SBFD symbols. Or, additionally, for any terminal supporting SBFD operation, when a downlink reception operation using SBFD symbols is set together with a downlink reception operation using non-SBFD symbols at the terminal, the base station sets a downlink reference signal including both at least one non-SBFD symbol and SBFD symbol. At this time, the downlink reference signal setting may be a CSI-RS setting or an SSB setting.

[0156] In this way, for any terminal configured for downlink reception via non-SBFD symbols and SBFD symbols, if at least one downlink reference signal configuration includes both non-SBFD symbols and SBFD symbols, the reference signal configuration information of QCL included in the TCI-state configuration information for PDSCH reception may be limited to a reference signal including both non-SBFD symbols and SBFD symbols. Accordingly, when the terminal acquires QCL information for PDSCH reception, if PDSCH reception according to the corresponding DCI format is performed via a non-SBFD symbol, PDSCH reception is performed based on CSI-RS or SSB instances transmitted via a non-SBFD symbol among CSI-RS or SSB transmissions according to the reference signal configuration of QCL indicated by the TCI field of the corresponding DCI format. Conversely, when PDSCH reception according to DCI format is performed through SBFD symbols, PDSCH can be received based on CSI-RS or SSB instances transmitted through SBFD symbols during CSI-RS or SSB transmission according to the reference signal setting of QCL indicated by the TCI field of the DCI format.

[0157]

[0158] As another method, the TCI state configuration unit included in PDSCH-config can be configured to distinguish between the existing TCI state configuration for PDSCH reception in non-SBFD symbols and the TCI state configuration for PDSCH reception in SBFD symbols. That is, the TCI state configuration information included in a PDSCH-config message for an arbitrary terminal can further include new TCI state configuration information for SBFD symbols (e.g., TCI-state_SBFD) along with the existing non-SBFD symbol-targeted TCI state configuration information.

[0159] In this case, when setting the reference signal information included in the QCL information of each TCI state setting as described above, if the corresponding TCI state is a QCL setting for an SBFD symbol, the corresponding reference signal may also be limited to an SSB or CSI-RS transmitted through an SBFD symbol, and conversely, if the corresponding TCI state is a QCL setting for a non-SBFD symbol, the corresponding reference signal may also be limited to an SSB or CSI-RS transmitted through a non-SBFD symbol. In addition, each TCI state setting information may further include symbol type indication information that is the target of the corresponding TCI state.

[0160] Based on the above TCI state setting, the base station activates code point information for at least one SBFD symbol-targeted TCI state and at least one non-SBFD symbol-targeted TCI state through one MAC CE signaling. Alternatively, the base station may transmit to the terminal a separate MAC CE signaling for activating code point information for the SBFD symbol-targeted TCI state, separately from the MAC CE signaling for activating code point information for the existing non-SBFD symbol-targeted TCI state. Alternatively, one MAC CE signaling may include both code point activation information for the non-SBFD symbol-targeted TCI state and code point activation information for the SBFD symbol-targeted TCI state. In this case, the MAC CE signaling for activating the code point of the TCI state may include an information field for indicating whether the TCI states activated through the MAC CE signaling are TCI states for non-SBFD symbols or TCI states for SBFD symbols.

[0161] When the terminal acquires QCL information for receiving any PDSCH, if at least one SBFD symbol-targeting TCI state and at least one non-SBFD symbol-targeting TCI state are mapped to separate code points and activated through one MAC CE signaling, the code point indication value of the TCI field of the DCI format including any PDSCH scheduling control information can be restricted to be indicated as one of the code point values ​​of the TCI state corresponding to the symbol type on which the corresponding PDSCH transmission is performed. When the terminal acquires QCL information for receiving any PDSCH, if the code point activation of the SBFD symbol-targeting TCI state and the code point activation of the non-SBFD symbol-targeting TCI state are respectively performed through separate MAC CE signaling or one MAC CE signaling, the terminal can interpret the code point of the TCI field of the DCI format including any PDSCH scheduling control information according to the symbol type on which the corresponding PDSCH transmission is performed. That is, when the symbol through which PDSCH transmission is performed is a non-SBFD symbol, the TCI state according to the code point of the TCI field of the DCI format is mapped based on the MAC CE signaling for activating the TCI state of the non-SBFD symbol target, so as to obtain QCL information. On the other hand, when the symbol through which PDSCH transmission is performed is an SBFD symbol, the TCI state according to the code point of the TCI field of the DCI format is mapped based on the MAC CE signaling for activating the TCI state of the SBFD symbol target, so as to obtain QCL information.

[0162]

[0163] As another method, the PDSCH configuration for SBFD symbols and the PDSCH configuration for non-SBFD symbols can be distinguished in units of PDSCH configuration messages, and the TCI state configuration and QCL configuration information for PDSCH reception can be distinguished accordingly. That is, when the base station transmits PDSCH-config information for an arbitrary terminal, the base station can additionally configure the SBFD symbol-targeted PDSCH-config information (e.g., PDSCH-config_SBFD) together with the existing normal symbol-targeted PDSCH-config (i.e., the non-SBFD symbol-targeted PDSCH) and transmit it to the terminal. Accordingly, the TCI state for PDSCH reception through non-SBFD symbols and the TCI state for PDSCH reception for SBFD symbols can be configured respectively through the TCI state configuration information included in each PDSCH-config and PDSCH-config_SBFD.

[0164] Based on the above TCI state configuration, the base station activates code point information for at least one SBFD symbol target TCI state and at least one non-SBFD symbol target TCI state through one MAC CE signaling. In this case, the TCI states included in each PDSCH-config and PDSCH-config_SBFD are assigned separate TCI state IDs. Alternatively, the base station may transmit to the terminal separate MAC CE signaling for activating code point information for the SBFD symbol target TCI state separately from the MAC CE signaling for activating code point information for the existing non-SBFD symbol target TCI state. Alternatively, one MAC CE signaling may include both code point activation information for the non-SBFD symbol target TCI state and code point activation information for the SBFD symbol target TCI state. In this case, the MAC CE signaling for activating the code point of the TCI state may include an information field for indicating whether the TCI states activated through the MAC CE signaling are TCI states for non-SBFD symbols or TCI states for SBFD symbols.

[0165] When the terminal acquires QCL information for receiving any PDSCH, if at least one SBFD symbol-targeting TCI state and at least one non-SBFD symbol-targeting TCI state are mapped to separate code points and activated through one MAC CE signaling, the code point indication value of the TCI field of the DCI format including any PDSCH scheduling control information can be restricted to be indicated as one of the code point values ​​of the TCI state corresponding to the symbol type on which the corresponding PDSCH transmission is performed. When the terminal acquires QCL information for receiving any PDSCH, if the code point activation of the SBFD symbol-targeting TCI state and the code point activation of the non-SBFD symbol-targeting TCI state are respectively performed through separate MAC CE signaling or one MAC CE signaling, the terminal can interpret the code point of the TCI field of the DCI format including any PDSCH scheduling control information according to the symbol type on which the corresponding PDSCH transmission is performed. That is, when the symbol through which PDSCH transmission is performed is a non-SBFD symbol, the TCI state according to the code point of the TCI field of the DCI format is mapped based on the MAC CE signaling for activating the TCI state of the non-SBFD symbol target, so as to obtain QCL information. On the other hand, when the symbol through which PDSCH transmission is performed is an SBFD symbol, the TCI state according to the code point of the TCI field of the DCI format is mapped based on the MAC CE signaling for activating the TCI state of the SBFD symbol target, so as to obtain QCL information.

[0166] Alternatively, an associated TCI state or TCI state pair may be defined. That is, a TCI state of a non-SBFD symbol and a TCI state pair for an SBFD symbol may be set, and the code point of the corresponding TCI state pair may be activated through MAC CE signaling. Accordingly, the code point by the TCI field of the DCI format indicates a pair of TCI state pairs, and the terminal may apply the QCL information by the TCI state corresponding to the SBFD symbol among the TCI state pair when the PDSCH reception symbol according to the DCI format is an SBFD symbol, and conversely, when the PDSCH reception symbol according to the DCI format is a non-SBFD symbol, the terminal may apply the QCL information by the TCI state corresponding to the non-SBFD symbol among the TCI state pair. In this case, the TCI state pair may be set by the base station through RRC signaling, or the TCI state for the SBFD symbol and the TCI state for the non-SBFD symbol of the same TCI state ID may be defined to form the TCI state pair.

[0167]

[0168] Meanwhile, if any one PDSCH transmission includes both SBFD symbols and non-SBFD symbols, ambiguity may arise in the application of the above QCL. Accordingly, a PDSCH transmission based on a single DCI format can be restricted to be performed through only a single symbol type. That is, a terminal does not expect that any one PDSCH transmission is allocated to be performed across different symbol types, i.e., SBFD symbols and non-SBFD symbols, and accordingly, the TDRA for the corresponding DCI format can be configured to include only non-SBFD symbols or only SBFD symbols.

[0169] Alternatively, any one PDSCH transmission may be allowed to include both non-SBFD symbols and SBFD symbols, in which case, among the PDSCH transmission symbols, the QCL information of the SBFD symbol among the QCL information of the indicated TCI state may be applied, and among the QCL information of the non-SBFD symbol among the QCL information of the indicated TCI state may be applied, in which case, the QCL information of the non-SBFD symbol among the QCL information of the indicated TCI state may be applied. Alternatively, in this case, the QCL information of a specific symbol target may be applied collectively to the corresponding PDSCH. For example, if any one PDSCH transmission includes at least one SBFD symbol, the QCL information for the corresponding PDSCH reception may be applied to the QCL information for the SBFD symbol among the QCL information of the TCI state corresponding to the code point by the TCI field of the DCI format. Alternatively, the DCI format may include symbol type indication information for applying the corresponding QCL information.

[0170]

[0171] Below, the terminal and base station devices capable of performing the aforementioned embodiments will be described again, focusing on their configuration.

[0172] Fig. 12 is a drawing showing the configuration of a terminal according to another embodiment.

[0173] Referring to FIG. 12, a terminal (1200) receiving downlink data may include a receiving unit (1230) that receives PDSCH (Physical Downlink Shared Channel) configuration information including TCI (transmission configuration index) state information from a base station, receives a MAC information element including activation instruction information for indicating activation of TCI state information including QCL (Quasi-Colation) information, and a control unit (1210) that confirms QCL (Quasi-Colation) information used for receiving downlink data using TCI state information indicated by downlink control information of a PDCCH (Physical Downlink Control Channel) for scheduling a PDSCH including downlink data information. The QCL information used for receiving downlink data may be separately set for a first type symbol in which subband-based full duplex communication is set and a second type symbol in which subband-based full duplex communication is not set.

[0174] For example, the receiver (1230) can receive PDSCH configuration information for PDSCH reception from the base station through a higher layer message. The PDSCH configuration information can include one or more pieces of TCI state information. For example, the TCI state information can include TCI state ID information and QCL information for identifying the corresponding TCI state. The QCL information can include at least one of serving cell index information, BWP ID information, reference signal information, and QCL type information.

[0175] Meanwhile, the receiver (1230) may receive slot configuration information from the base station. The slot configuration information may include information for configuring each slot or symbol as downlink, uplink, or special in a TDD environment. Furthermore, the slot configuration information may also include information regarding whether each slot or symbol is configured for subband-based full-duplex communication.

[0176] The symbols used for receiving downlink data can be divided into a first type symbol in which subband-based full duplex communication is established and a second type symbol in which the subband-based full duplex communication is not established. In addition, the slots used for receiving downlink data can be divided into a first type slot in which subband-based full duplex communication is established and a second type slot in which the subband-based full duplex communication is not established.

[0177] Accordingly, the terminal can apply differentiated QCL information depending on whether the symbol in which the PDSCH is received is a type 1 symbol or a type 2 symbol. To this end, it is necessary to receive differentiated QCL information set for each type of symbol.

[0178] For example, the PDSCH configuration information may include first PDSCH configuration information including first type QCL information set for a first type symbol and second PDSCH configuration information including second type QCL information set for a second type symbol. That is, the first type QCL information for the first type symbol and the second type QCL information for the second type symbol may be included as sub-information elements or fields of different PDSCH configuration information.

[0179] As another example, the TCI state information may be divided into first TCI state information including first type QCL information set for a first type symbol and second TCI state information including second type QCL information set for a second type symbol. That is, the first type QCL information and the second type QCL information may be included in the same PDSCH configuration information (PDSCH-config), but may be distinguished by being included in different TCI state information. In this case, an indicator for distinguishing the TCI state may be included.

[0180] As another example, the TCI state information may include Type 1 QCL information configured for Type 1 symbols and Type 2 QCL information configured for Type 2 symbols, respectively. That is, Type 1 QCL information and Type 2 QCL information may be included in the same TCI state separately. In this case, an indicator for distinguishing the QCL information may be included. In addition, Type 1 QCL information and Type 2 QCL information may be paired and included in the TCI state information. That is, Type 1 QCL information and Type 2 QCL information may be paired and included in one TCI state information. In this case, even if one TCI state is specified to be used, Type 1 QCL and Type 2 QCL information may be selected and applied depending on the type of symbol in which the PDSCH is received.

[0181] In addition to this, the first type QCL information and the second type QCL information can be distinguished in various ways and received by the receiving unit (1230).

[0182] For example, the activation indication information may be included in a MAC information element (MAC CE) and received by the receiver (1230). The activation indication information may include indication information for indicating specific TCI state information among the TCI state information included in the PDSCH configuration information to be in an activated state. For example, the PDSCH configuration information includes 16 pieces of TCI state information, and the MAC CE may indicate up to 8 pieces of TCI state information among them to be in an activated state.

[0183] Meanwhile, as explained above, QCL information can also be differentiated based on the type of each symbol. Accordingly, the activation instruction information indicated through the MAC CE can also be configured in various ways.

[0184] For example, the MAC information element may be divided into a first MAC information element for activating first TCI state information used for PDSCH reception through a first type symbol and a second MAC information element for activating second TCI state information used for PDSCH reception through a second type symbol. For example, in the case where TCI state information is divided according to the symbol type, the MAC CEs for activating each of the first TCI state information and the second TCI state information may be defined as different MAC CEs. In this case, the TCI state information may be included in the same PDSCH configuration information or may be included in different PDSCH configuration information.

[0185] As another example, the MAC information element may include both a field for activating the first TCI state information used for PDSCH reception via the first type symbol and a field for activating the second TCI state information used for PDSCH reception via the second type symbol. For example, activation indication information may be indicated via one MAC information element, but each field may be distinguished such that the field for activating the first TCI state information and the field for activating the second TCI state information are distinguished. In this case, the TCI state information may be included in the same PDSCH configuration information or may be included in different PDSCH configuration information.

[0186] The control unit (1210) can set up to 8 pieces of TCI state information to an activated state (specified by codepoint) according to the activation instruction information.

[0187] The receiver (1230) can receive a PDCCH that schedules the PDSCH to receive downlink data information via the PDSCH. The PDCCH includes downlink control information, and various information may be included in the downlink control information depending on the PDCCH format. In particular, the downlink control information may include a field value for indicating TCI state information applied for PDSCH reception.

[0188] The field value for indicating TCI state information can indicate at least one TCI state information among up to eight TCI state information indicated by the activation indication information. However, as in the present disclosure, when full-duplex communication is established in the symbol for the terminal to receive PDSCH and there are type 1 and type 2 symbols, it is necessary to apply QCL information separately. Therefore, the TCI state information indicated by the downlink control information also needs to be confirmed by considering the symbol type.

[0189] For example, the value of the TCI field may indicate different TCI state information depending on whether the symbol on which the PDSCH is received is of the first type or the second type. For example, if the value of the TCI field is included as a specific value, the control unit (1210) may interpret it as indicating first TCI state information including first type QCL information when the symbol on which the PDSCH is received is a first type symbol. Similarly, if the value of the TCI field is included as the same specific value, the control unit (1210) may interpret it as indicating second TCI state information including second type QCL information when the symbol on which the PDSCH is received is a second type symbol.

[0190] As another example, if the value of the TCI field is included as a specific value, the TCI state information may include type 1 QCL information and type 2 QCL information. In this case, the control unit (1210) may apply type 1 QCL information when the symbol through which the PDSCH is received is a type 1 symbol, and may apply type 2 QCL information when it is a type 2 symbol.

[0191] In addition, the control unit (1210) controls the overall operation of the terminal (1200) according to receiving downlink data according to different types of symbols required to perform the aforementioned embodiment.

[0192] The transmitter (1220) and receiver (1230) are used to transmit and receive signals, messages, and data necessary to perform the aforementioned embodiment with the base station.

[0193] Fig. 13 is a drawing showing the configuration of a base station according to another embodiment.

[0194] Referring to FIG. 13, a base station (1300) that controls reception of downlink data of a terminal may include a transmitter (1320) that transmits PDSCH (Physical Downlink Shared Channel) configuration information including TCI (transmission configuration index) state information to the terminal, a MAC information element including activation instruction information for instructing activation of TCI state information including QCL (Quasi-Colation) information to the terminal, and a control unit (1310) that generates downlink control information indicating TCI state information used to confirm QCL (Quasi-Colation) information used by the terminal for receiving downlink data.

[0195] The transmitter (1320) can transmit downlink control information to a terminal by including it in a Physical Downlink Control Channel (PDCCH) for scheduling a PDSCH including downlink data information. The QCL information used for receiving downlink data can be separately set for a first type symbol in which subband-based full-duplex communication is set and a second type symbol in which subband-based full-duplex communication is not set.

[0196] For example, the transmitter (1320) can transmit PDSCH configuration information to the terminal through a higher layer message (e.g., RRC message). The PDSCH configuration information can include one or more pieces of TCI state information. For example, the TCI state information can include TCI state ID information and QCL information for identifying the corresponding TCI state. The QCL information can include at least one of serving cell index information, BWP ID information, reference signal information, and QCL type information.

[0197] Meanwhile, the transmitter (1320) may transmit slot configuration information to the terminal. The slot configuration information may include information for configuring each slot or symbol as downlink, uplink, or special in a TDD environment. Furthermore, the slot configuration information may also include information regarding whether each slot or symbol is configured for subband-based full-duplex communication.

[0198] The control unit (1310) can be configured to apply differentiated QCL information depending on whether the symbol transmitting the PDSCH is a type 1 symbol or a type 2 symbol. To this end, differentiated QCL information needs to be transmitted for each type of symbol.

[0199] For example, the PDSCH configuration information may include first PDSCH configuration information including first type QCL information set for a first type symbol and second PDSCH configuration information including second type QCL information set for a second type symbol. That is, the first type QCL information for the first type symbol and the second type QCL information for the second type symbol may be included as sub-information elements or fields of different PDSCH configuration information.

[0200] As another example, the TCI state information may be divided into first TCI state information including first type QCL information set for a first type symbol and second TCI state information including second type QCL information set for a second type symbol. That is, the first type QCL information and the second type QCL information may be included in the same PDSCH configuration information (PDSCH-config), but may be distinguished by being included in different TCI state information. In this case, an indicator for distinguishing the TCI state may be included.

[0201] As another example, the TCI state information may include Type 1 QCL information configured for Type 1 symbols and Type 2 QCL information configured for Type 2 symbols, respectively. That is, Type 1 QCL information and Type 2 QCL information may be included in the same TCI state separately. In this case, an indicator for distinguishing the QCL information may be included. In addition, Type 1 QCL information and Type 2 QCL information may be paired and included in the TCI state information. That is, Type 1 QCL information and Type 2 QCL information may be paired and included in one TCI state information. In this case, even if one TCI state is specified to be used, Type 1 QCL and Type 2 QCL information may be selected and applied depending on the type of symbol in which the PDSCH is received.

[0202] In addition, the first type QCL information and the second type QCL information can be distinguished and transmitted in various ways.

[0203] Additionally, activation indication information can be included in a MAC information element (MAC CE) and transmitted to the terminal. The activation indication information can include indication information for indicating a specific TCI state information among the TCI state information included in the PDSCH configuration information to be activated. For example, if the PDSCH configuration information includes 16 TCI state information, the MAC CE can indicate up to 8 of these TCI state information to be activated.

[0204] Meanwhile, as explained above, QCL information can also be differentiated based on the type of each symbol. Accordingly, the activation instruction information indicated through the MAC CE can also be configured in various ways.

[0205] For example, the MAC information element may be divided into a first MAC information element for activating first TCI state information used for PDSCH reception through a first type symbol and a second MAC information element for activating second TCI state information used for PDSCH reception through a second type symbol. For example, in the case where TCI state information is divided according to the symbol type, the MAC CEs for activating each of the first TCI state information and the second TCI state information may be defined as different MAC CEs. In this case, the TCI state information may be included in the same PDSCH configuration information or may be included in different PDSCH configuration information.

[0206] As another example, the MAC information element may include both a field for activating the first TCI state information used for PDSCH reception via the first type symbol and a field for activating the second TCI state information used for PDSCH reception via the second type symbol. For example, activation indication information may be indicated via one MAC information element, but each field may be distinguished such that the field for activating the first TCI state information and the field for activating the second TCI state information are distinguished. In this case, the TCI state information may be included in the same PDSCH configuration information or may be included in different PDSCH configuration information.

[0207] The terminal can set up to 8 TCI state information to the activated state (specified by codepoint) according to the activation instruction information.

[0208] For example, the transmitter (1320) may transmit a PDCCH that schedules the PDSCH for transmitting downlink data information via the PDSCH. The PDCCH includes downlink control information, and various information may be included in the downlink control information depending on the PDCCH format. In particular, the downlink control information may include a field value for indicating TCI state information applied for PDSCH reception.

[0209] The field value for indicating TCI state information can indicate at least one TCI state information among up to eight TCI state information indicated by the activation indication information. However, as in the present disclosure, when full-duplex communication is established in the symbol for the terminal to receive PDSCH and there are type 1 and type 2 symbols, it is necessary to apply QCL information separately. Therefore, the TCI state information indicated by the downlink control information also needs to be confirmed by considering the symbol type.

[0210] For example, the value of the TCI field may indicate different TCI state information depending on whether the symbol on which the PDSCH is received is of the first type or the second type. For example, if the value of the TCI field is included as a specific value, it may be set to indicate first TCI state information including first type QCL information when the symbol on which the PDSCH is received is a first type symbol. Similarly, if the value of the TCI field is included as the same specific value, it may be set to indicate second TCI state information including second type QCL information when the symbol on which the PDSCH is received is a second type symbol.

[0211] As another example, if the value of the TCI field is included as a specific value, the TCI state information may include type 1 QCL information and type 2 QCL information. In this case, the terminal may apply type 1 QCL information when the symbol in which the PDSCH is received is a type 1 symbol, and may apply type 2 QCL information when it is a type 2 symbol.

[0212] In addition, the control unit (1310) controls the overall operation of the base station (1300) according to transmitting downlink data according to different types of symbols required to perform the aforementioned embodiment.

[0213] The transmitter (1320) and receiver (1330) are used to transmit and receive signals, messages, and data necessary for performing the aforementioned embodiment to and from the terminal.

[0214] The above-described embodiments may be supported by standard documents disclosed in at least one of the wireless access systems, IEEE 802, 3GPP, and 3GPP2. That is, steps, components, and parts not described in the present embodiments to clearly illustrate the technical concepts herein may be supported by the above-described standard documents. Furthermore, all terms disclosed in this specification may be explained by the above-described standard documents.

[0215] The embodiments described above may be implemented through various means. For example, the embodiments may be implemented through hardware, firmware, software, or a combination thereof.

[0216] In the case of hardware implementation, the method according to the present embodiments may be implemented by one or more ASICs (Application Specific Integrated Circuits), DSPs (Digital Signal Processors), DSPDs (Digital Signal Processing Devices), PLDs (Programmable Logic Devices), FPGAs (Field Programmable Gate Arrays), processors, controllers, microcontrollers, or microprocessors.

[0217] When implemented using firmware or software, the methods according to the present embodiments may be implemented in the form of devices, procedures, or functions that perform the functions or operations described above. The software code may be stored in a memory unit and executed by a processor. The memory unit may be located within or outside the processor and may exchange data with the processor using various known means.

[0218] Additionally, terms such as "system," "processor," "controller," "component," "module," "interface," "model," or "unit" as described above may generally refer to a computer-related entity, such as hardware, a combination of hardware and software, software, or software in execution. For example, the aforementioned components may be, but are not limited to, a process driven by a processor, a processor, a controller, a control processor, an object, a thread of execution, a program, and / or a computer. For example, both an application running on a controller or a processor and the controller or the processor may be components. One or more components may be within a process and / or thread of execution, and the components may be located on a single device (e.g., a system, a computing device, etc.) or distributed across two or more devices.

[0219] The above description is merely an illustrative example of the technical idea of ​​the present disclosure, and those skilled in the art to which the present disclosure pertains will appreciate that various modifications and variations can be made without departing from the essential characteristics of the technical idea of ​​the present disclosure. In addition, the present embodiments are not intended to limit the technical idea of ​​the present disclosure but rather to explain it, and therefore the scope of the technical idea of ​​the present disclosure is not limited by these embodiments. The scope of protection of the present disclosure should be interpreted by the claims below, and all technical ideas within a scope equivalent thereto should be interpreted as being included within the scope of the rights of the present disclosure.

[0220]

[0221] CROSS-REFERENCE TO RELATED APPLICATION

[0222] This patent application claims priority under 35 USC §119(a) to Korean Patent Application No. 10-2024-0016744, filed in Korea on February 2, 2024, and Korean Patent Application No. 10-2025-0011341, filed in Korea on January 24, 2025, the entire contents of which are incorporated herein by reference. In addition, this patent application claims priority in countries other than the United States for the same reasons, the entire contents of which are incorporated herein by reference.

Claims

1. In a method for a terminal to receive downlink data, A step of receiving PDSCH (Physical Downlink Shared Channel) configuration information including TCI (transmission configuration index) state information from a base station; A step of receiving a MAC information element including activation instruction information for indicating activation of the TCI state information including QCL (Quasi-Colation) information; and A step of checking QCL (Quasi-Colation) information used for receiving downlink data using TCI state information indicated by downlink control information of PDCCH (Physical Downlink Control Channel) for scheduling PDSCH including downlink data information, The QCL information used to receive the above downlink data is: A method for separately setting a first type symbol for which subband-based full duplex communication is set and a second type symbol for which subband-based full duplex communication is not set.

2. In paragraph 1, The above PDSCH configuration information is: A method comprising first PDSCH configuration information including first type QCL information set for the first type symbol and second PDSCH configuration information including second type QCL information set for the second type symbol.

3. In paragraph 1, The above TCI state information is: A method for distinguishing between first TCI state information including first type QCL information set for the first type symbol and second TCI state information including second type QCL information set for the second type symbol.

4. In paragraph 1, The above TCI state information is: A method for distinguishing and including first type QCL information set for the first type symbol and second type QCL information set for the second type symbol.

5. In paragraph 4, The above first type QCL information and the above second type QCL information are, How to be paired and included in the above TCI state information.

6. In paragraph 1, The above MAC information element is, A method divided into a first MAC information element for activating first TCI state information used for receiving the PDSCH through the first type symbol and a second MAC information element for activating second TCI state information used for receiving the PDSCH through the second type symbol.

7. In paragraph 1, The above MAC information element is, A method comprising a field for activating first TCI state information used for receiving the PDSCH through the first type symbol and a field for activating second TCI state information used for receiving the PDSCH through the second type symbol.

8. In paragraph 1, The above downlink control information is, It includes a TCI field for indicating TCI state information used for receiving the PDSCH among the TCI state information activated by the above activation instruction information, The value of the above TCI field is: A method in which the above PDSCH is interpreted as indicating different TCI state information depending on whether the symbol received is of type 1 or type 2.

9. In a method for controlling reception of downlink data of a terminal by a base station, A step of transmitting PDSCH (Physical Downlink Shared Channel) configuration information including TCI (transmission configuration index) state information to a terminal; A step of transmitting a MAC information element including activation instruction information for instructing activation of the TCI state information including QCL (Quasi-Colation) information to the terminal; A step for generating downlink control information indicating TCI state information used to confirm QCL (Quasi-Colation) information used by the terminal for receiving downlink data; and Including the step of transmitting the above downlink control information to the terminal by including it in a PDCCH (Physical Downlink Control Channel) for scheduling a PDSCH including the above downlink data information, The QCL information used to receive the above downlink data is: A method for separately setting a first type symbol for which subband-based full duplex communication is set and a second type symbol for which subband-based full duplex communication is not set.

10. In paragraph 9, The above PDSCH configuration information is: A method comprising first PDSCH configuration information including first type QCL information set for the first type symbol and second PDSCH configuration information including second type QCL information set for the second type symbol.

11. In paragraph 9, The above TCI state information is: A method for distinguishing between first TCI state information including first type QCL information set for the first type symbol and second TCI state information including second type QCL information set for the second type symbol.

12. In paragraph 9, The above TCI state information is: A method for distinguishing and including first type QCL information set for the first type symbol and second type QCL information set for the second type symbol 13. In a terminal receiving downlink data, A receiving unit that receives PDSCH (Physical Downlink Shared Channel) configuration information including TCI (transmission configuration index) state information from a base station and receives a MAC information element including activation instruction information for indicating activation of the TCI state information including QCL (Quasi-Colation) information; and A control unit is included that checks QCL (Quasi-Colation) information used for receiving downlink data by using TCI state information indicated by downlink control information of PDCCH (Physical Downlink Control Channel) for scheduling PDSCH including downlink data information. The QCL information used to receive the above downlink data is: A terminal configured separately for a first type symbol in which subband-based full duplex communication is established and a second type symbol in which subband-based full duplex communication is not established.

14. In paragraph 13, The above PDSCH configuration information is: A terminal including first PDSCH configuration information including first type QCL information set for the first type symbol and second PDSCH configuration information including second type QCL information set for the second type symbol.

15. In paragraph 13, The above TCI state information is: A terminal distinguished by first TCI state information including first type QCL information set for the first type symbol and second TCI state information including second type QCL information set for the second type symbol.

16. In paragraph 13, The above TCI state information is: A terminal including first type QCL information set for the first type symbol and second type QCL information set for the second type symbol in pairs.

17. In paragraph 13, The above MAC information element is, A terminal divided into a first MAC information element for activating first TCI state information used for receiving the PDSCH through the first type symbol and a second MAC information element for activating second TCI state information used for receiving the PDSCH through the second type symbol.

18. In paragraph 13, The above downlink control information is, It includes a TCI field for indicating TCI state information used for receiving the PDSCH among the TCI state information activated by the above activation instruction information, The value of the above TCI field is: A terminal that interprets the above PDSCH as indicating different TCI state information depending on whether the symbol received is of type 1 or type 2.

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