Method and apparatus for reporting inter-link interference in wireless communication system

Abstract

The present disclosure relates to a 5G communication or 6G communication system for supporting a higher data transmission rate. A method performed by a user equipment (UE) in a wireless communication system, according to the present disclosure, may comprise the steps of: receiving, from a base station, CSI resource configuration information comprising cross link interference (CLI) resource configuration information about CLI associated with subband full duplex (SBFD); receiving, from the base station, CSI report configuration information comprising CLI report configuration information about CLI associated with SBFD; measuring a sounding reference signal (SRS)-reference signal received power (RSRP) resource or a CLI-received signal strength indicator (RSSI) resource on the basis of the CLI resource configuration information; receiving, from the base station, downlink control information (DCI) indicating an aperiodic CLI report; and transmitting, to the base station, a CLI report on the measured SRS-RSRP resource or CLI-RSSI resource, on the basis of the CLI report configuration information.

Description

Method and device for reporting inter-link interference in a wireless communication system

[0001] The present disclosure relates to a wireless communication system or a mobile communication system. Specifically, it relates to a method and apparatus for reporting inter-link interference for partial band multiplexing in a wireless communication system.

[0002] 5G mobile communication technology defines a wide frequency band to enable fast transmission speeds and new services, and can be implemented not only in frequency bands below 6 GHz ('Sub 6 GHz'), such as 3.5 gigahertz (3.5 GHz), but also in ultra-high frequency bands called millimeter waves (mmWave), such as 28 GHz and 39 GHz ('Above 6 GHz'). In addition, for 6G mobile communication technology, which is referred to as a system beyond 5G, implementation in the terahertz (THX) band (e.g., the 3 terahertz band at 95 GHz) is being considered to achieve transmission speeds 50 times faster and ultra-low latency reduced to one-tenth compared to 5G mobile communication technology.

[0003] In the early stages of 5G mobile communication technology, aiming to satisfy service support and performance requirements for enhanced Mobile BroadBand (eMBB), Ultra-Reliable Low-Latency Communications (URLLC), and Massive Machine-Type Communications (mMTC), technologies included beamforming and Massive MIMO to mitigate path loss and increase transmission distance in ultra-high frequency bands; support for various numerologies (such as operating multiple subcarrier spacings) and dynamic operation of slot formats for the efficient utilization of ultra-high frequency resources; initial access techniques to support multi-beam transmission and broadband; the definition and operation of Band-Width Parts (BWP); Low Density Parity Check (LDPC) codes for high-volume data transmission; new channel coding methods such as Polar Codes for the reliable transmission of control information; and L2 pre-processing (L2 Standardization has been carried out for pre-processing, network slicing which provides a dedicated network specialized for specific services, and other methods.

[0004] Currently, discussions are underway to improve and enhance the performance of the initial 5G mobile communication technology, taking into account the services that the 5G mobile communication technology was intended to support. Additionally, standardization of the physical layer is in progress for technologies such as V2X (Vehicle-to-Everything), which helps autonomous vehicles make driving decisions and enhance user convenience based on their own location and status information transmitted by the vehicle; NR-U (New Radio Unlicensed), which aims for system operation in unlicensed bands to comply with various regulatory requirements; NR terminal low power consumption technology (UE Power Saving); Non-Terrestrial Network (NTN), which is direct terminal-satellite communication for securing coverage in areas where communication with the terrestrial network is impossible; and positioning.

[0005] In addition, standardization is underway in the field of wireless interface architecture / protocols for technologies such as the Industrial Internet of Things (IIoT) to support new services through linkage and convergence with other industries, Integrated Access and Backhaul (IAB) which provides nodes to expand network service areas by integrating wireless backhaul links and access links, Mobility Enhancement including Conditional Handover and Dual Active Protocol Stack (DAPS) Handover, and 2-step Random Access (2-step RACH for NR) which simplifies random access procedures. Standardization is also underway in the field of system architecture / services for 5G baseline architectures (e.g., Service based Architecture, Service based Interface) to incorporate Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC), which provides services based on the location of the terminal.

[0006] When such 5G mobile communication systems are commercialized, connected devices, which are increasing explosively, will be connected to communication networks. Accordingly, it is expected that there will be a need to enhance the functionality and performance of 5G mobile communication systems and to integrate the operation of connected devices. To this end, new research is planned to be conducted on 5G performance improvement and complexity reduction, support for AI services, support for metaverse services, and drone communication using eXtended Reality (XR), Artificial Intelligence (AI), and Machine Learning (ML) to efficiently support Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR).

[0007] Furthermore, the advancement of these 5G mobile communication systems encompasses multi-antenna transmission technologies such as new waveforms, Full Dimensional MIMO (FD-MIMO), array antennas, and large-scale antennas to guarantee coverage in the terahertz band of 6G mobile communication technology; metamaterial-based lenses and antennas; high-dimensional spatial multiplexing technology using Orbital Angular Momentum (OAM); and Reconfigurable Intelligent Surface (RIS) technology to improve terahertz band signal coverage; as well as full-duplex technology for enhancing frequency efficiency and system networks in 6G mobile communication technology; AI-based communication technologies that realize system optimization by utilizing satellites and Artificial Intelligence (AI) from the design stage and internalizing end-to-end AI support functions; and the realization of services of complexity exceeding the limits of terminal computing capabilities by utilizing ultra-high-performance communication and computing resources. It could serve as a foundation for the development of next-generation distributed computing technologies.

[0008] The present disclosure considers a method for a terminal to perform random access to a cell in which conditional Subband Full Duplex (SBFD; partial band bidirectional communication) is configured, specifically a method to support random access in an RRC connected state, an IDLE state, and an INACTIVE state.

[0009] A method according to one embodiment for solving the above-mentioned problem comprises, in a method for processing a control signal in a wireless communication system, a step of receiving a first control signal transmitted from a base station; a step of processing the received first control signal; a step of generating a second control signal based on the processing; and a step of transmitting the generated second control signal to the base station.

[0010] As the SBFD terminal proposed in the present disclosure performs random access operations through SBFD resources in a cell that supports SBFD, latency can be significantly reduced during random access to the cell, random access can be performed with low power, and interference effects on adjacent cells and terminals can be reduced.

[0011] FIG. 1a is a drawing illustrating the structure of a next-generation mobile communication system according to various embodiments of the present disclosure.

[0012] FIG. 1b is a diagram showing the wireless protocol structure of a next-generation mobile communication system according to various embodiments of the present disclosure.

[0013] FIG. 1c is a drawing for explaining the concept of a subband full duplex (hereinafter SBFD) of a base station or cell according to various embodiments of the present disclosure.

[0014] FIG. 1d is a diagram illustrating cross-link interference when SBFD cells are configured in a next-generation mobile communication system according to various embodiments of the present disclosure.

[0015] FIG. 1e is a diagram illustrating the overall operation for a terminal according to various embodiments of the present disclosure to measure cross-link interference of another terminal in a cell that supports SBFD.

[0016] FIG. 1f is a diagram proposing a MAC CE structure that is instructed to measure a resource semi-persistently among the resources set for CLI measurement of another terminal according to various embodiments of the present disclosure.

[0017] FIG. 1g is a diagram illustrating the overall terminal operation of performing CLI measurements using SBFD resources according to various embodiments of the present disclosure.

[0018] FIG. 1h is a drawing illustrating base station operation according to various embodiments of the present disclosure.

[0019] FIG. 1i is a block diagram illustrating the internal structure of a terminal according to various embodiments of the present disclosure.

[0020] FIG. 1j is a block diagram showing the configuration of a base station according to various embodiments of the present disclosure.

[0021] FIG. 1k illustrates the structure of a base station according to various embodiments of the present disclosure.

[0022] FIG. 11 illustrates the structure of a terminal according to various embodiments of the present disclosure.

[0023] The operating principle of the present invention will be described in detail below with reference to the attached drawings. In describing the present invention below, if it is determined that a detailed description of related known functions or configurations might unnecessarily obscure the essence of the invention, such detailed description will be omitted. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intentions or conventions of the user or operator. Therefore, such definitions should be based on the content throughout this specification. Terms used in the following description to identify connection nodes, terms referring to network entities, terms referring to messages, terms referring to interfaces between network entities, terms referring to various identification information, etc., are provided as examples for the convenience of explanation. Accordingly, the present invention is not limited to the terms described below, and other terms referring to objects having equivalent technical meanings may be used.

[0024] For convenience of explanation below, the present invention uses terms and names defined in the 3GPP LTE (3rd Generation Partnership Project Long Term Evolution) standard. However, the present invention is not limited by the above terms and names and can be applied in the same way to systems conforming to other standards.

[0025] FIG. 1a is a drawing illustrating the structure of a next-generation mobile communication system according to various embodiments of the present disclosure.

[0026] Referring to FIG. 1a, as illustrated, the wireless access network of a next-generation mobile communication system consists of a next-generation base station (New Radio Node B, hereinafter NR NB, 1a-10) and an NR CN (New Radio Core Network, or NG CN: Next Generation Core Network, 1a-05). A user terminal (New Radio User Equipment, hereinafter NR UE or terminal, 1a-15) connects to an external network through the NR NB (1a-10) and the NR CN (1a-05).

[0027] In FIG. 1a, the NR NB (1a-10) corresponds to the eNB (Evolved Node B) of the existing LTE system. The NR NB is connected to the NR UE (1a-15) via a wireless channel and can provide superior service compared to the existing Node B. In next-generation mobile communication systems, since all user traffic is serviced through a shared channel, a device is required to collect status information such as the buffer status, available transmission power status, and channel status of the UEs to perform scheduling, and this can be handled by the NR NB (1a-10). A single NR NB can typically control multiple cells. To achieve ultra-high-speed data transmission compared to existing LTE, it can have a maximum bandwidth greater than that of existing LTE, and can additionally incorporate beamforming technology by using Orthogonal Frequency Division Multiplexing (hereinafter referred to as OFDM) as the wireless access technology. In addition, an Adaptive Modulation & Coding (AMC) method can be applied to determine the modulation scheme and channel coding rate according to the channel conditions of the terminal. The NR CN (1a-05) can perform functions such as mobility support, bearer configuration, and QoS configuration. The NR CN is a device responsible for various control functions as well as mobility management functions for the terminal, and can be connected to multiple base stations. Furthermore, the next-generation mobile communication system can be interoperable with existing LTE systems, and the NR CN can be connected to the MME (1a-25) via a network interface. The MME can be connected to the existing base station eNB (1a-30).

[0028] FIG. 1b is a diagram showing the wireless protocol structure of a next-generation mobile communication system according to various embodiments of the present disclosure.

[0029] Referring to Fig. 1b, the wireless protocol of the next-generation mobile communication system can be composed of NR SDAP (service data adaptation protocol) (1b-01, 1b-45), NR PDCP (packet data convergence protocol) (1b-05, 1b-40), NR RLC (radio link control) (1b-10, 1b-35), and NR MAC (medium access control) (1b-15, 1b-30) at the terminal and the NR base station, respectively.

[0030] The main functions of NR SDAP (1b-01, 1b-45) may include some of the following functions.

[0031] - User data transfer function (transfer of user plane data)

[0032] - Mapping function between a QoS flow and a DRB for both DL and UL for uplink and downlink

[0033] - Marking QoS flow ID for uplink and downlink (marking QoS flow ID in both DL and UL packets)

[0034] - Function to map reflective QoS flow to data bearers for uplink SDAP PDUs (reflective QoS flow to DRB mapping for the UL SDAP PDUs).

[0035] Regarding the SDAP layer device, the terminal may receive a setting via an RRC message indicating whether to use the header of the SDAP layer device or the functions of the SDAP layer device for each PDCP layer device, bearer, or logical channel. If the SDAP header is configured, the terminal may be instructed to update or reset the mapping information for the QoS flow of the uplink and downlink and the data bearer using the NAS reflective QoS and AS reflective QoS 1-bit indicators of the SDAP header. The SDAP header may include QoS flow ID information indicating QoS. The QoS information may be used for data processing priority, scheduling information, etc., to support smooth service.

[0036] The main functions of NR PDCP (1b-05, 1b-40) may include some of the following functions.

[0037] - Header compression and decompression features (ROHC only)

[0038] - User data transfer function (Transfer of user data)

[0039] - Sequential delivery function (In-sequence delivery of upper layer PDUs)

[0040] - Out-of-sequence delivery of upper layer PDUs

[0041] - Reordering function (PDCP PDU reordering for reception)

[0042] - Duplicate detection function (Duplicate detection of lower layer SDUs)

[0043] - Retransmission of PDCP SDUs

[0044] - Encryption and decryption functions (Ciphering and deciphering)

[0045] - Timer-based SDU discard in uplink.

[0046] In the above, the reordering function of the NR PDCP device refers to a function that reorders PDCP PDUs received from a lower layer in order based on the PDCP SN (sequence number), and may include a function that transmits data to an upper layer in the reordered order, or may include a function that transmits it immediately without considering the order. Additionally, the reordering function of the NR PDCP device may include a function that records lost PDCP PDUs by reordering them, a function that reports the status of lost PDCP PDUs to the transmitting side, and a function that requests retransmission of lost PDCP PDUs.

[0047] The main functions of NR RLC(1b-10, 1b-35) may include some of the following functions.

[0048] - Data transfer function (Transfer of upper layer PDUs)

[0049] - Sequential delivery function (In-sequence delivery of upper layer PDUs)

[0050] - Out-of-sequence delivery of upper layer PDUs

[0051] - ARQ function (Error Correction through ARQ)

[0052] - Concatenation, segmentation, and reassembly functions of RLC SDUs

[0053] - Re-segmentation function (Re-segmentation of RLC data PDUs)

[0054] - Reordering function (Reordering of RLC data PDUs)

[0055] - Duplicate detection

[0056] - Error detection function (Protocol error detection)

[0057] - RLC SDU discard function

[0058] RLC re-establishment function

[0059] In the above, the sequential delivery function (in-sequence delivery) of the NR RLC device refers to a function of delivering RLC SDUs received from a lower layer to an upper layer in order. If a single RLC SDU is originally received divided into multiple RLC SDUs, it may include a function of reassembling and delivering them. It may also include a function of rearranging the received RLC PDUs based on an RLC SN (sequence number) or PDCP SN (sequence number). Furthermore, it may include a function of recording lost RLC PDUs by rearranging the order, a function of reporting the status of lost RLC PDUs to the transmitting side, a function of requesting retransmission of lost RLC PDUs, and, if there are lost RLC SDUs, a function of delivering only the RLC SDUs up to the lost RLC SDU in order to an upper layer. Alternatively, the sequential delivery function of the NR RLC device may include a function to deliver all RLC SDUs received before the timer started to the upper layer in order if a predetermined timer expires even if there are lost RLC SDUs, or a function to deliver all RLC SDUs received up to now to the upper layer in order if a predetermined timer expires even if there are lost RLC SDUs.

[0060] In addition, the RLC PDUs described above may be processed in the order they are received (regardless of the order of sequence numbers, in the order of arrival) and delivered to the PDCP device out of order (out-of-sequence delivery). In the case of segments, segments stored in a buffer or to be received later may be received, reconstructed into a single complete RLC PDU, processed, and delivered to the PDCP device. The NR RLC layer may not include a concatenation function, and this function may be performed by the NR MAC layer or replaced by the multiplexing function of the NR MAC layer.

[0061] In the above, the out-of-sequence delivery function of the NR RLC device refers to a function of delivering RLC SDUs received from a lower layer directly to an upper layer regardless of order. It may include a function of reassembling and delivering them when a single RLC SDU is received divided into multiple RLC SDUs, and may include a function of storing the RLC SN or PDCP SN of the received RLC PDUs and sorting the order to record the lost RLC PDUs.

[0062] The NR MAC (1b-15, 1b-30) can be connected to multiple NR RLC layer devices configured in a terminal, and the main functions of the NR MAC may include some of the following functions.

[0063] - Mapping function (Mapping between logical channels and transport channels)

[0064] - Multiplexing and demultiplexing functions (Multiplexing / demultiplexing of MAC SDUs)

[0065] - Scheduling information reporting function

[0066] - HARQ function (Error correction through HARQ)

[0067] - Priority handling between logical channels of one UE

[0068] - Priority handling between UEs by means of dynamic scheduling

[0069] - MBMS service identification function

[0070] - Transport format selection function

[0071] - Padding

[0072] The NR PHY (physical) layer (1b-20, 1b-25) can perform the operation of channel coding and modulating upper layer data, creating OFDM symbols and transmitting them to the wireless channel, or demodulating OFDM symbols received through the wireless channel and channel decoding them to transmit them to the upper layer.

[0073] FIG. 1c is a drawing for explaining the concept of a subband full duplex (hereinafter SBFD) of a base station or cell according to various embodiments of the present disclosure.

[0074] Referring to the drawing, the base station (1c-05) performs wireless communication (1c-15) with the terminal (1c-10), and for this purpose, it determines frequency and time resources (1c-20) and allocates (schedules) downlink (DL) and uplink (UL) resources to the terminal within the resources. SBFD basically operates in a cell that supports TDD (Time Division Duplex), and the following embodiment assumes operation in a TDD cell. In the past, the resources (1c-20) allocated to the terminal could be composed of a downlink slot (1c-25), an uplink slot (1c-45), and a flexible or special slot allocated when changing the downlink / uplink direction. Now, with the introduction of SBFD, it has become possible to configure SBFD slots (1c-30, 1c-35, 1c-40) in which downlink and uplink resources are mixed between the base station and the terminal that can use SBFD. The SBFD slots (1c-30, 1c-35, 1c-40) can be configured not only in the same location as in Fig. 1c, but also in any slot that the base station wishes to configure, such as the Downlink slot of 1c-25.

[0075] In this situation, to support random access of the terminal, the base station can allocate an uplink physical layer Random Access Channel (PRACH) capable of transmitting and receiving a preamble for random access within an SBFD slot, rather than the existing uplink slot (1c-45), and can allocate a RACH occasion (RO) (1c-50). The SBFD RO may be contained within an SBFD slot as shown in FIG. 1c, may exist across one or more SBFD slots, and may exist across not only one or more SBFD slots but also a normal Uplink slot (1c-45).

[0076] Through this SBFD RO (1c-50), terminals capable of using SBFD gain additional RO opportunities in addition to existing legacy RO, thereby enabling random access with even less latency and collision.

[0077] As explained above, a base station or cell supporting SBFD may support random access using SBFD resources depending on the RRC connection status of the terminal, and may allocate a physical Random Access Channel (PRACH) and a RACH occasion (RO) for this purpose.

[0078] FIG. 1d is a diagram illustrating cross-link interference when SBFD cells are configured in a next-generation mobile communication system according to various embodiments of the present disclosure.

[0079] This figure illustrates the influence of cross-link interference (CLI) on operating dynamic TDD scheduling / configuration in an NR system applicable to the entire present invention, and the present method and apparatus are proposed to support such scenarios. Furthermore, from the perspective of a base station, remote interference management (RIM) for terminals can be performed by receiving and applying measurements of cross-link interference. For example, this can be achieved by applying dynamic TDD scheduling. Additionally, the SBFD of FIG. 1c can be applied to this figure. This figure describes an example where downlink slots at 1d-45 and 1d-65 are applied as SBFD slots. In reality, SBFD operations are performed on slots in more surrounding cells and the current source cell.

[0080] Referring to FIG. 1d, a mobile communication network composed of TDD cells may exist in the vicinity. For example, as shown in the figure, if a serving cell gNB 1 (1d-05, or base station 1) to which terminal 1 (1d-15) is connected supports TDD in the cell, a surrounding cell gNB 2 (1d-10, or base station 2) may also support the cell with TDD. There may be terminal 2 (1d-20) connected to the gNB 2 (1d-10) to receive service. Additionally, the downlink reference signal (1d-25) and data transmission transmitted from base station 1 to the terminals may be measured as uplink interference (1d-35) for base station 2. Additionally, the uplink SRS (sounding reference signal) transmission (1d-30) or data transmission transmitted by terminal 2 (1d-20) to base station 2 (1d-30), which is the corresponding serving cell, may be received as cross-link interference (1d-40) by a terminal receiving service from another serving cell (base station 1, 1d-05), such as terminal 1. In the above, the measurements of cross-link interference include SRS-RSRP (SRS received signal received power, the RSRP value for the SRS resource transmitted by a terminal belonging to a neighboring cell and the SRS resource measured by a terminal belonging to the current serving cell) and CLI-RSSI (CLI received signal strength indicator, the signal strength measured by a terminal belonging to the current serving cell for all signals transmitted by a terminal belonging to a neighboring cell). In particular, the present invention can consider the influence of cross-link interference information of CLI resources (SRS-RSRP and SCLI-RSSI) transmitted by other terminals in specific SBFD slots at 1d-45 and 1d-60.

[0081] The method of setting up and downlink symbols in an NR TDD system differs from that of an LTE system and can be summarized as follows.

[0082] 1) Cell-specific configuration: Flexible uplink and downlink symbol allocation via system information or common RRC signals

[0083] 2) UE-specific configuration: Allocate resources assigned as flexible symbols to uplink or downlink symbols via dedicated RRC messages.

[0084] 3) Setting via group common indication: Change flexible symbols via group-common PDCCH, i.e., SFI (slot format indicator).

[0085] 4) UE-specific indication: Change flexible symbols via UE-specific PDCCH, i.e., DCI (downlink control indicator).

[0086] In other words, symbols for basic uplink transmission, flexible transmission, and downlink transmission supported by the cell are allocated for specific slots, and symbols allocated for flexible transmission can be changed to other transmission methods for each terminal. In the above, the symbols for flexible transmission refer to flexible symbols that can be designated as symbols for uplink and downlink transmission by base station settings. If the corresponding flexible symbol is not changed for other transmission, neither uplink nor downlink transmission occurs for that symbol.

[0087] For example, as illustrated in FIG. 1d, TDD pattern 1 (1d-45, 1d-50, 1d-55) can be set in a cell supported by base station 1. That is, in a slot consisting of a total of 14 symbols, 6 symbols for downlink transmission (1d-45), 3 symbols for flexible transmission (1d-50), and 5 symbols for uplink transmission (1d-55) can be set sequentially. Additionally, TDD pattern 2 (1d-65, 1d-70, 1d-75) can be set in a cell supported by base station 2. That is, in a slot consisting of a total of 14 symbols, 2 symbols for downlink transmission (1d-65), 1 symbol for flexible transmission (1d-70), and 11 symbols for uplink transmission (1d-75) can be set sequentially. In the above situation, terminal 1 (1d-15) and terminal 2 (1d-20), each belonging to base station 1 (1d-05) and base station 2 (1d-10), respectively, perform data transmission and reception and reference signal transmission and reception according to the TDD resource information set in the corresponding serving cell. A specific downlink section (1d-60) set in terminal 1 may overlap with a specific uplink section (1d-80) of a surrounding cell, and terminal 1 (1d-15), which is located at the edge of the cell, may be affected by interference from the surrounding cell. That is, cross-link interference may be received from terminal 2 (1d-20) during the downlink reception section (1d-60), which lowers communication performance. The above communication performance lowers the data transmission and reception rate because the interference signal affects the downlink signal originally intended to be received, increasing the probability of failure in reception and decoding. Here, in the case of an SBFD cell, in addition to terminal interference from adjacent cells, downlink and uplink signals occur simultaneously in the corresponding SBFD slot even within the same cell, and it is necessary to measure uplink interference transmitted by other SBFD terminals in the same slot.

[0088] Regarding the problem described above, if the terminal measures SRS-RSRP and CLI-RSSI during the interval (1d-45, 1d-65) in which the base station instructs the terminal to measure SBFD cross-link interference and reports the measured values ​​to the base station, the base station can determine the extent of the terminal's cross-link interference in that interval. Based on this, the base station can adjust the scheduling for SBFD resource allocation and adjust the terminal's uplink / downlink transmission slots and symbols through dynamic TDD settings.

[0089] The entire scenario described in this drawing is not limited to scenarios between SBFD cells, but can also be applied in situations where TDD cells, FDD cells, and SBFD cells are mixed.

[0090] FIG. 1e is a diagram illustrating the overall operation for a terminal according to various embodiments of the present disclosure to measure cross-link interference of another terminal in a cell that supports SBFD.

[0091] First, to explain the overall operation of the embodiment, a terminal (1e-05) in the RRC IDLE state can camp on to cell 1 (1e-10) and receive system information from the cell. In particular, at step 1e-15, the terminal (1e-05) can receive SIB1 from cell 1 (1e-10). At least one of the following may be transmitted to the SIB1: a slot configuration for semi-static uplink / downlink (UL / DL) resources in TDD, a slot configuration for SBFD resources in the UL / DL, and a random access configuration for the legacy UE and SBFD UE.

[0092] In step 1e-20, the terminal (1e-05) applies the settings in SIB1 received from cell 1 (1e-10) and can verify random access operations by combining SBFD resource setting information and random access settings. Basically, SBFD resource usage and random access operations can be applied while following the operation of the UL / DL resource slots in the TDD broadcast in SIB1. For example, if the TDD resource settings and the SBFD resource settings match, PDCCH monitoring operations can be performed on the DL resources in the corresponding SBFD slot and the DL resources in the non-SBFD slot. And, uplink transmission can be performed on the UL resources in the corresponding SBFD slot and the UL resources in the non-SBFD slot.

[0093] In step 1e-25, the terminal (1e-05) can perform a random access preamble transmission based on the SBFD random access configuration information in SIB1 received from cell 1 (1e-10). The random access procedure may be a CBRA (contention based random access) operation based on the SBFD configuration. In step 1e-30, the terminal (1e-05) can receive a random access response (RAR) message from cell 1 (1e-10). This operation is also based on the SBFD configuration received from SIB1. In step 1e-35, the terminal (1e-05) can apply the received RAR information (TA, UL grant, Temporary C-RNTI) and transmit an RRCSetupRequest message to cell 1 (1e-10). In step 1e-40, the terminal (1e-05) can receive an RRCSetup message in response to an RRCSetupRequest message transmitted from cell 1 (1e-10). In step 1e-45, the terminal (1e-05) can transmit an RRCSetupComplete message to cell 1 (1e-10) and transition to an RRC connection state.

[0094] Subsequently, in step 1e-50, the serving cell (1e-10) transmits RRC configuration information to the terminal, and the configuration may include SBFD-related resources and SBFD random access settings. The SBFD-related resources and SBFD random access settings are settings for SBFD support in an RRC connection state, and may be the same as or different from the settings transmitted in SIB1 in step 1e-15. For example, the SBFD resource configuration information may be semi-static for the cell, in which case it may be the same as the settings in SIB1. On the other hand, in the case of SBFD RACH settings, there may be differences because the SBFD RACH settings for a terminal in an RRC IDLE state and the SBFD RACH settings for a terminal in an RRC connection state may be different. In addition, the above settings may include settings for CLI resources and settings for CLI resource reporting, which are mainly proposed in the present invention. This is a CLI resource configuration and reporting configuration, particularly in an SBFD slot, and unlike the existing Layer 3-based CLI resource configuration and reporting configuration, it may be in the form of a Layer 1-based CLI resource configuration and reporting configuration.

[0095] First, regarding CLI resource configuration, it follows the method used for configuring existing Layer 1 CSI resources, and new CLI measurement resource sets can be added to the configuration. That is, CLI measurement resource set lists exist within the CSI-ResourceConfig IE, and SRS-RSRP and CLI-RSSI resources can be configured within these resource sets. More specifically, SRS-RSRP and CLI-RSSI resources may be configured simultaneously within a single CLI measurement resource set, or only one of the two resource types (SRS-RSRP and CLI-RSSI) may be configured within a single CLI measurement resource set. Additionally, each SRS-RSRP and CLI-RSSI resource configuration can be periodic, semi-persistent, or aperioditic. In particular, when adding CLI resource configurations to the existing CSI-ResourceConfig IE, a method is also proposed for handling the CSI resource information (csi-RS-ResourceSetList) that was previously required to be configured. In other words, if a new CLI resource setting is provided within the same CSI-ResourceConfig IE, a restriction is added so that the terminal ignores and does not apply the existing CSI resource information (csi-RS-ResourceSetList), even if it exists. This ensures that multiple resource settings do not exist within a single CSI-ResourceConfigId. For reference, the signaling for the CLI resource setting method described above is added in [Table 1] below. This signaling is provided only in structure for simplified explanatory purposes, and the actual signaling may be provided in more detail based on this.

[0096]

[0097]

[0098]

[0099] Furthermore, regarding the CLI resource reporting settings, the CLI reporting settings are based on at least one-time reporting (aperiodic CLI reporting), and if necessary, periodic and semi-periodic reporting may also be included. In this invention, a method for one-time CLI measurement reporting is described. For CLI measurement reporting settings, a section for CLI reporting may be additionally provided in the CSI-ReportConfig IE where existing CSI reporting settings are provided; in this case, SRS-RSRP and CLI-RSSI may be added to reportQuantity, which is the form of measurement reporting. Additionally, for reportConfigType, which was mandatory in the existing CSI-ReportConfig IE, a constraint is added that only aperiodic reporting can be configured when a resource is connected for CLI purposes in SBFD. Furthermore, offset information between the DCI reception where aperiodic reporting is indicated and the slot where the actual aperiodic CLI report is reported may be additionally provided. In particular, one of the following two methods may be used as a signaling method to associate CLI resource settings within the CSI-ReportConfig IE.

[0100] 1) Option 1: A method to associate the existing resourcesForChannelMeasurement parameter with a CSI resource configuration index (CSI-ResourceConfigId) associated with the CLI. In this case, the existing resourcesForChannelMeasurement can be reused for CLI purposes.

[0101] 2) Option 2: Introduce a separate new parameter (field) to associate CLI resources. In this case, behavior is required to handle the existing mandatory resourcesForChannelMeasurement field along with the newly specified CLI resource association field. That is, a new constraint is required to ignore the existing resourcesForChannelMeasurement field even if a value exists, if the newly specified CLI resource association field exists.

[0102] This can be explained by the following [Table 2].

[0103]

[0104] Furthermore, for aperiodic CSI reporting, an action is required to indicate the CSI aperiodic triggering status. This is a method of managing status by associating a CSI report with a single CSI resource existing within a specific CSI resource set; in the case of aperiodic CSI reporting, the triggering status can be managed on a per-resource basis. In particular, referring to ASN.1 below, the resourceForChannel field within CSI-AssociatedReportConfigInfo is a mandatory field that indicates which resource is associated with the corresponding aperiodic report configuration. Currently, association is possible only for CSI-RS and SSB resources; however, if association is to be performed for CLI resources as well, the CLI resources must be associated using a new field (resourceForChannel-r19). In this case, if a CLI associated resource exists, the existing resourceForChannel field is ignored. Refer to [Table 3] below regarding this.

[0105]

[0106]

[0107] For reference, since the configuration related to CLI aperiodic triggering states is supported as an extension of the existing CSI-AssociatedReportConfigInfo, the MAC CE (Aperiodic CSI Trigger State Subselection MAC CE) that previously enabled CSI aperiodic triggering states can also be used in the CLI case. In other words, specific states from the list of aperiodic triggering states can be associated with CLI resources and CLI aperiodic reporting settings, and this index can be activated as is using the existing MAC CE.

[0108] In step 1e-55, the base station may transmit a signal to the terminal instructing it to activate CLI resources (SRS-RSRP, CLI-RSSI) configured on other terminals. As described above, CLI resources can be configured. For periodic CLI resources, the terminal can take measurements immediately once RRC is configured; however, for semi-persistent CLI resources or aperiodic CLI resources, separate signaling is required to activate the CLI resources. First, for semi-persistent CLI resources, a MAC CE is introduced to activate / deactivate the corresponding CLI resource. The detailed MAC CE structure is explained in detail in Fig. 1f. Additionally, for aperiodic CLI resources, a DCI that activates the corresponding resource may be used. This may take the form of including the CSI resource configuration index to indicate resource activation and adding bits for activation / deactivation, or it may involve signaling by expanding the fields of an existing DCI or introducing and using a new DCI.

[0109] In step 1e-60 of FIG., the terminal can perform measurements on the CLI resources configured / instructed according to the CLI resource configuration and activation signals. Additionally, in step 1e-65, the base station can instruct the terminal on which aperiodic report configuration is currently active by transmitting a MAC CE that activates the current aperiodic triggering state for the report configurations where aperiodic CLI resource reporting is actually configured for the resources being measured. In step 1e-70, the base station requests a CLI report from the terminal via the DCI for the aperiodic resource report configurations that require actual CLI reporting. In step 1e-75, the terminal reports the CLI measurement values ​​associated with the corresponding CLI report to the base station according to the information contained in the DCI (report configuration index and report instruction). This can be reported by being stored in the UCI (uplink control information) via PUSCH, or a new MAC CE can be introduced and reported. Contents included in the report may include CSI resource set index (CLI resource set id and resource id for each resource type), resource type (SRS-RSRP, CSL-RSSI), and measure (SRS-RSRP or CSL-RSSI).

[0110] In step 1e-80, the serving cell (1e-10) determines UL / DL scheduling based on the TDD resource information and SBFD resource settings configured for the terminal, and transmits signaling (DCI; downlink control information) containing the scheduling. In step 1e-85, the terminal performs downlink PDSCH reception and uplink PUCCH and PUSCH transmission according to the instructed scheduling information.

[0111] FIG. 1f is a diagram proposing a MAC CE structure that receives instructions for semi-persistently measuring resources of resources set for CLI measurement of another terminal according to various embodiments of the present disclosure. The MAC CE is associated with the CLI resource setting described in FIG. 1h and is characterized by including instructions for activating CLI resource resources included in a specific CLI resource set.

[0112] - A / D field (1f-05): A bit indicating the activation and deactivation of the specified resources. If set to 1, it indicates activation, and if set to 0, it indicates deactivation.

[0113] - CLI Resource Set's Cell ID (1f-10): The cell index where the CLI resource set is configured

[0114] - CLI Resource Set's BWP ID (1f-15): BWP index where the CLI resource set is configured

[0115] - Reserved bit (1f-20, 1f-35, 1f-45): Reserve bit

[0116] - Type (1f-25): Indicates whether it is an SRS-RSSP or CLI-RSSI resource (SRS-RSSP if 1, CLI-RSSI if 0)

[0117] - Resource ID (1f-40, 1f-50): Index of the resource to which actual activation is indicated

[0118] FIG. 1g is a diagram illustrating the overall terminal operation of performing CLI measurements using SBFD resources according to various embodiments of the present disclosure.

[0119] In step 1g-05, the terminal receives SBFD resources and SBFD random access settings from system information (SIB1) broadcast by the base station. The settings also include TDD UL / DL resource slot settings and are provided to satisfy validity between the settings and the SBFD. For detailed operation, refer to the TDD UL / DL resource settings and SBFD settings in FIGS. 1c and 1d.

[0120] In the 1g-10 stage, the terminal establishes an RRC connection procedure with the base station, and if SIB1 includes an SBFD random access setting and the terminal satisfies the SBFD random access setting conditions, it can perform random access through SBFD resources accordingly. However, if SIB1 does not include an SBFD random access setting or the terminal does not satisfy the SBFD random access conditions, it can perform the existing random access procedure.

[0121] In step 1g-15, configuration information regarding CLI measurement and reporting via SBFD resources can be received from the base station via an RRC configuration message (or RRC signaling). Subsequently, in step 1g-20, the terminal receives activation and deactivation instruction signals for CLI resources, specifically semi-persistent and aperiodic CLI resources. MAC CE is used for semi-persistent CLI resources, and DCI is used for aperiodic CLI resources.

[0122] In step 1g-25, the terminal can receive DCI from the base station and receive aperiodic CLI measurement report commands. Accordingly, in step 1g-30, the terminal can report CLI measurement results to the base station according to the measurement report settings. In step 1g-35, data transmission and reception can be performed using SBFD resources.

[0123] FIG. 1h is a drawing illustrating base station operation according to various embodiments of the present disclosure.

[0124] In step 1h-05, the base station may broadcast system information (SIB1) including SBFD resources and SBFD random access settings. The settings may also include TDD UL / DL resource slot settings and may be provided to satisfy validity between the settings and the SBFD. For detailed operation, refer to the TDD UL / DL resource settings and SBFD settings in FIGS. 1c and 1d.

[0125] In step 1h-10, the terminal can utilize SBFD resources in the RRC connection procedure, and the base station can perform the random access procedure in response. In step 1h-15, the base station receives a terminal capability report from the connected terminal, and the terminal capability report may include SBFD-related terminal capabilities. Accordingly, terminal capabilities related to SBFD-related terminal capabilities, i.e., CLI-related terminal capabilities (CLI measurement and reporting, processing capabilities by resource may also be reported), may be included. SBFD-related terminal capabilities may be provided per terminal or per band (TDD band). SBFD random access-related capabilities may not be reported together with CLI-related terminal capabilities but may be reported separately. That is, SBFD random access-related capabilities may be reported as capabilities separate from CLI-related capabilities. CLI-related terminal capabilities may also be provided per terminal or per band (TDD band). Alternatively, SBFD-related terminal capabilities or CLI-related terminal capabilities may be included in and delivered within a FeatureCombination configuration (or message). FeatureCombination settings (or messages) are sets of information that report various functions supported by the terminal to the base station, and may be included in SBFD random access settings information.

[0126] In step 1h-20, the base station transmits to the terminal an RRC configuration message containing SBFD-related configuration information, and the SBFD-related configuration information may include configuration information regarding CLI measurement resources and configuration information for reporting CLI measurement results. Specifically, based on the random access procedure performed in step 1h-10 and the terminal's SBFD-related terminal capabilities received from the connected terminal according to the random access procedure in step 1h-15, the base station may transmit SBFD-related settings to the terminal to instruct CLI measurement resources and CLI measurement reporting. The base station may transmit the SBFD-related settings by including them in the RRC configuration message.

[0127] Subsequently, in step 1h-25, the base station may instruct the terminal to use CLI measurement resources and trigger aperiodic CLI measurement reports. Specifically, the base station may transmit a signal to the terminal instructing it to activate CLI resources (SRS-RSRP, CLI-RSSI) configured on other terminals. If the instructed CLI measurement resource is an aperiodic CLI resource, a DCI that activates the corresponding resource may be used. This may take the form of including the CSI resource configuration index to instruct resource activation and adding bits for activation / deactivation, or it may signal by expanding the fields of an existing DCI or by introducing and using a new DCI. The terminal, having received instructions for CLI measurement resources from the base station and triggered aperiodic CLI measurement reports, may perform measurements on the configured / instructed CLI resources according to the CLI resource configuration and activation signals. Additionally, the base station may transmit a MAC CE that activates the current aperiodic triggering state for the report configurations where aperiodic CLI resource reports are actually configured for the resources being measured, thereby instructing the terminal which aperiodic report configuration is currently active. The base station can request CLI reporting from the terminal via DCI for aperiodic resource reporting settings that require actual CLI reporting.

[0128] In step 1h-30, a CLI measurement report is received from the terminal, and in step 1h-35, the base station can update settings for intra-cell interference control based on the CLI settings or improve SBFD operations by sharing information with neighboring cells based on the CLI measurement report received from the terminal. Specifically, by performing random access while considering the inter-link interference state, the latency that may occur due to interference when performing random access without considering the inter-link interference state can be significantly reduced, random access can be performed with low power, and the impact of interference on adjacent cells and terminals can be reduced. In addition, data transmission and reception scheduling can be performed while considering interference of SBFD resources, and data transmission and reception performance can be improved by reducing interference from adjacent cells and terminals in the same cell.

[0129] FIG. 1i is a block diagram illustrating the internal structure of a terminal according to various embodiments of the present disclosure.

[0130] Referring to the drawing above, the terminal includes an RF (Radio Frequency) processing unit (1i-10), a baseband processing unit (1i-20), a storage unit (1i-30), and a control unit (1i-40).

[0131] The RF processing unit (1i-10) performs functions for transmitting and receiving signals through a wireless channel, such as signal band conversion and amplification. That is, the RF processing unit (1i-10) up-converts the baseband signal provided by the baseband processing unit (1i-20) into an RF band signal and transmits it through an antenna, and down-converts the RF band signal received through the antenna into a baseband signal. For example, the RF processing unit (1i-10) may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a DAC (digital to analog converter), an ADC (analog to digital converter), etc. Although only one antenna is shown in the drawing, the terminal may be equipped with multiple antennas. In addition, the RF processing unit (1i-10) may include multiple RF chains. Furthermore, the RF processing unit (1i-10) may perform beamforming. For the above beamforming, the RF processing unit (1i-10) can adjust the phase and magnitude of each of the signals transmitted and received through a plurality of antennas or antenna elements. In addition, the RF processing unit can perform MIMO and can receive multiple layers when performing MIMO operation.

[0132] The baseband processing unit (1i-20) performs a conversion function between a baseband signal and a bit sequence according to the physical layer specifications of the system. For example, when transmitting data, the baseband processing unit (1i-20) generates complex symbols by encoding and modulating the transmitted bit sequence. Additionally, when receiving data, the baseband processing unit (1i-20) restores the received bit sequence by demodulating and decoding the baseband signal provided by the RF processing unit (1i-10). For example, in the case of following the orthogonal frequency division multiplexing (OFDM) method, when transmitting data, the baseband processing unit (1i-20) generates complex symbols by encoding and modulating the transmitted bit sequence, maps the complex symbols to subcarriers, and then constructs OFDM symbols through inverse fast Fourier transform (IFFT) operations and cyclic prefix (CP) insertion. Additionally, upon receiving data, the baseband processing unit (1i-20) divides the baseband signal provided by the RF processing unit (1i-10) into OFDM symbol units, restores the signals mapped to subcarriers through a fast Fourier transform (FFT) operation, and then restores the received bit sequence through demodulation and decoding.

[0133] The baseband processing unit (1i-20) and the RF processing unit (1i-10) transmit and receive signals as described above. Accordingly, the baseband processing unit (1i-20) and the RF processing unit (1i-10) may be referred to as a transmitting unit, a receiving unit, a transmitting and receiving unit, or a communication unit. Furthermore, at least one of the baseband processing unit (1i-20) and the RF processing unit (1i-10) may include a plurality of communication modules to support a plurality of different wireless access technologies. Additionally, at least one of the baseband processing unit (1i-20) and the RF processing unit (1i-10) may include different communication modules to process signals of different frequency bands. For example, the different wireless access technologies may include wireless LAN (e.g., IEEE 802.11), cellular network (e.g., LTE), etc. In addition, the above different frequency bands may include super high frequency (SHF) bands (e.g., 2 NRHz, NRHz) and millimeter wave (e.g., 60 GHz) bands.

[0134] The storage unit (1i-30) stores data such as basic programs, application programs, and configuration information for the operation of the terminal. In particular, the storage unit (1i-30) can store information related to a second connection node that performs wireless communication using a second wireless connection technology. Additionally, the storage unit (1i-30) provides the stored data upon a request from the control unit (1i-40).

[0135] The control unit (1i-40) controls the overall operations of the terminal. For example, the control unit (1i-40) transmits and receives signals through the baseband processing unit (1i-20) and the RF processing unit (1i-10). Additionally, the control unit (1i-40) writes and reads data to and from the storage unit (1i-40). To this end, the control unit (1i-40) may include at least one processor. For example, the control unit (1i-40) may include a communication processor (CP) that performs control for communication and an application processor (AP) that controls upper layers such as applications.

[0136] FIG. 1j is a block diagram showing the configuration of a base station according to various embodiments of the present disclosure.

[0137] As illustrated in the drawing above, the base station is configured to include an RF processing unit (1j-10), a baseband processing unit (1j-20), a backhaul communication unit (1j-30), a storage unit (1j-40), and a control unit (1j-50).

[0138] The RF processing unit (1j-10) performs functions for transmitting and receiving signals through a wireless channel, such as signal band conversion and amplification. That is, the RF processing unit (1j-10) up-converts the baseband signal provided by the baseband processing unit (1j-20) into an RF band signal and transmits it through an antenna, and down-converts the RF band signal received through the antenna into a baseband signal. For example, the RF processing unit (1j-10) may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, etc. Although only one antenna is shown in the drawing, the first connection node may be equipped with multiple antennas. Additionally, the RF processing unit (1j-10) may include multiple RF chains. Furthermore, the RF processing unit (1j-10) may perform beamforming. For the above beamforming, the RF processing unit (1j-10) can adjust the phase and magnitude of each of the signals transmitted and received through a plurality of antennas or antenna elements. The RF processing unit can perform down-to-down MIMO operation by transmitting one or more layers.

[0139] The baseband processing unit (1j-20) performs a conversion function between a baseband signal and a bit sequence according to the physical layer specifications of the first wireless access technology. For example, when transmitting data, the baseband processing unit (1j-20) generates complex symbols by encoding and modulating the transmitted bit sequence. Additionally, when receiving data, the baseband processing unit (1j-20) restores the received bit sequence by demodulating and decoding the baseband signal provided by the RF processing unit (1j-10). For example, in the case of following the OFDM method, when transmitting data, the baseband processing unit (1j-20) generates complex symbols by encoding and modulating the transmitted bit sequence, maps the complex symbols to subcarriers, and then constructs OFDM symbols through IFFT operation and CP insertion. Additionally, upon receiving data, the baseband processing unit (1j-20) divides the baseband signal provided by the RF processing unit (1j-10) into OFDM symbol units, restores the signals mapped to subcarriers through FFT operations, and then restores the received bit sequence through demodulation and decoding. The baseband processing unit (1j-20) and the RF processing unit (1j-10) transmit and receive signals as described above. Accordingly, the baseband processing unit (1j-20) and the RF processing unit (1j-10) may be referred to as a transmitting unit, a receiving unit, a transmitting and receiving unit, a communication unit, or a wireless communication unit.

[0140] The backhaul communication unit (1j-30) provides an interface for communicating with other nodes within the network. That is, the backhaul communication unit (1j-30) converts a bit sequence transmitted from the main base station to another node, e.g., an auxiliary base station, a core network, etc., into a physical signal, and converts a physical signal received from the other node into a bit sequence.

[0141] The storage unit (1j-40) stores data such as basic programs, application programs, and configuration information for the operation of the main station. In particular, the storage unit (1j-40) can store information regarding bearers assigned to connected terminals, measurement results reported from connected terminals, etc. Additionally, the storage unit (1j-40) can store information serving as a criterion for determining whether to provide or disconnect multiple connections to the terminals. Furthermore, the storage unit (1j-40) provides the stored data upon the request of the control unit (1j-50).

[0142] The control unit (1j-50) controls the overall operations of the main station. For example, the control unit (1j-50) transmits and receives signals through the baseband processing unit (1j-20) and the RF processing unit (1j-10) or through the backhaul communication unit (1j-30). Additionally, the control unit (1j-50) writes and reads data to and from the storage unit (1j-40). To this end, the control unit (1j-50) may include at least one processor.

[0143] FIG. 1k illustrates the structure of a base station according to various embodiments of the present disclosure.

[0144] Referring to FIG. 1k, a base station may include a transceiver (1k-10), a control unit (1k-20), and a storage unit (1k-30). The transceiver (1k-10), the control unit (1k-20), and the storage unit (1k-30) may operate according to the communication method of the base station described above. A network device may also correspond to the structure of the base station. However, the components of the base station are not limited to the examples described above. For example, the base station may include more components or fewer components than the components described above. For example, the base station may include a transceiver (1k-10) and a control unit (1k-20). Furthermore, the transceiver (1k-10), the control unit (1k-20), and the storage unit (1k-30) may be implemented in the form of a single chip.

[0145] The transceiver unit (1k-10) collectively refers to the receiver unit and the transmitter unit of a base station and can transmit and receive signals with a terminal, another base station, or other network devices. At this time, the signals transmitted and received may include control information and data. For example, the transceiver unit (1k-10) can transmit system information to a terminal and transmit a synchronization signal or a reference signal. To this end, the transceiver unit (1k-10) may be composed of an RF transmitter that up-converts and amplifies the frequency of the transmitted signal, and an RF receiver that low-noise amplifies the received signal and down-converts the frequency. However, this is merely one embodiment of the transceiver unit (1k-10), and the components of the transceiver unit (1k-10) are not limited to an RF transmitter and an RF receiver. The transceiver unit (1k-10) may include a wired / wireless transceiver unit and may include various configurations for transmitting and receiving signals. Additionally, the transceiver (1k-10) can receive a signal through a communication channel (e.g., a wireless channel) and output it to a control unit (1k-20), and transmit the signal output from the control unit (1k-20) through the communication channel. Additionally, the transceiver (1k-10) can receive a communication signal and output it to a processor, and transmit the signal output from the processor to a terminal, another base station, or another entity through a wired or wireless network.

[0146] The storage unit (1k-30) can store programs and data necessary for the operation of the base station. Additionally, the storage unit (1k-30) can store control information or data included in signals obtained from the base station. The storage unit (1k-30) may be composed of a storage medium or a combination of storage media such as ROM, RAM, hard disk, CD-ROM, and DVD. Additionally, the storage unit (1k-30) can store at least one of information transmitted and received through the transceiver unit (1k-10) and information generated through the control unit (1k-20).

[0147] In the present disclosure, the control unit (1k-20) may be defined as a circuit or an application-specific integrated circuit or at least one processor. The processor may include a communication processor (CP) that performs control for communication and an application processor (AP) that controls upper layers such as applications. The control unit (1k-20) may control the overall operation of a base station according to an embodiment proposed in the present disclosure. For example, the control unit (1k-20) may control the signal flow between each block to perform operations according to the flowchart described above.

[0148] FIG. 11 illustrates the structure of a terminal according to various embodiments of the present disclosure.

[0149] Referring to FIG. 11, the terminal may include a transceiver (11-10), a control unit (11-20), and a storage unit (11-30). The transceiver (11-10), the control unit (11-20), and the storage unit (11-30) may operate according to the communication method of the terminal described above. However, the components of the terminal are not limited to the examples described above. For example, the terminal may include more components or fewer components than the components described above. For example, the terminal may include a transceiver (11-10) and a control unit (11-20). In addition, the transceiver (11-10), the control unit (11-20), and the storage unit (11-30) may be implemented in the form of a single chip.

[0150] The transceiver unit (1l-10) collectively refers to the receiving unit and the transmitting unit of a terminal and can transmit and receive signals with a base station, another terminal, or a network entity. The signals transmitted and received with the base station may include control information and data. For example, the transceiver unit (1l-10) can receive system information from the base station and can receive synchronization signals or reference signals. To this end, the transceiver unit (1l-10) may be composed of an RF transmitter that up-converts and amplifies the frequency of the transmitted signal, and an RF receiver that low-noise amplifies the received signal and down-converts the frequency. However, this is merely one embodiment of the transceiver unit (1l-10), and the components of the transceiver unit (1l-10) are not limited to the RF transmitter and the RF receiver. Additionally, the transceiver unit (1l-10) may include a wired / wireless transceiver unit and may include various configurations for transmitting and receiving signals. Additionally, the transceiver (1l-10) can receive a signal through a wireless channel and output it to a control unit (1l-20), and transmit the signal output from the control unit (1l-20) through a wireless channel. Additionally, the transceiver (1l-10) can receive a communication signal and output it to a processor, and transmit the signal output from the processor to a network entity through a wired or wireless network.

[0151] The storage unit (1l-30) can store programs and data necessary for the operation of the terminal. Additionally, the memory (1l-30) can store control information or data included in signals obtained from the terminal. The storage unit (1l-30) may be composed of a storage medium or a combination of storage media such as ROM, RAM, hard disk, CD-ROM, and DVD.

[0152] In the present disclosure, the control unit (1l-20) may be defined as a circuit or an application-specific integrated circuit or at least one processor. The processor may include a communication processor (CP) that performs control for communication and an application processor (AP) that controls upper layers such as application programs. The control unit (1l-20) may control the overall operation of the terminal according to the embodiment proposed in the present disclosure. For example, the control unit (1l-20) may control the signal flow between each block to perform operations according to the flowchart described above.

[0153] Methods according to the embodiments described in the claims or specification of the present invention may be implemented in the form of hardware, software, or a combination of hardware and software.

[0154] When implemented in software, a computer-readable storage medium may be provided for storing one or more programs (software modules). One or more programs stored in the computer-readable storage medium are configured for execution by one or more processors within an electronic device. One or more programs include instructions that cause the electronic device to execute methods according to embodiments described in the claims or specification of the present invention.

[0155] These programs (software modules, software) may be stored in random access memory, non-volatile memory including flash memory, ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), magnetic disc storage devices, CD-ROM (Compact Disc-ROM), Digital Versatile Discs (DVDs), or other forms of optical storage devices, magnetic cassettes. Alternatively, they may be stored in memory composed of some or all of these. Additionally, each constituent memory may include multiple units.

[0156] In addition, the above program may be stored on an attachable storage device that can be accessed via a communication network such as the Internet, Intranet, Local Area Network (LAN), Wide LAN (WLAN), or Storage Area Network (SAN), or a combination thereof. Such a storage device may be connected to a device performing an embodiment of the present invention through an external port. Additionally, a separate storage device on a communication network may be connected to a device performing an embodiment of the present invention.

[0157] In the specific embodiments of the present invention described above, the components included in the invention are expressed in a singular or plural form according to the specific embodiments presented. However, the singular or plural expression is selected to suit the situation presented for convenience of explanation, and the present invention is not limited to singular or plural components; even if a component is expressed in the plural form, it may be composed in the singular form, or even if a component is expressed in the singular form, it may be composed in the plural form.

[0158] Meanwhile, although specific embodiments have been described in the detailed description of the present invention, it is understood that various modifications are possible within the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims set forth below as well as equivalents thereof. In other words, it is obvious to those skilled in the art that other modifications based on the technical concept of the present disclosure are possible. Furthermore, each of the above embodiments may be combined and operated as needed. For example, parts of the methods proposed in the present disclosure may be combined to operate a base station and a terminal. Additionally, while the above embodiments have been presented based on 5G and NR systems, other modifications based on the technical concept of the above embodiments may be implemented in other systems such as LTE, LTE-A, and LTE-A-Pro systems.

Claims

1. A method performed by a terminal (user equipment) in a wireless communication system, A step of receiving CSI resource configuration information including CLI resource configuration information for cross-link interference (CLI) associated with subband full duplex (SBFD) from a base station; A step of receiving CSI reporting setting information including CLI reporting setting information for a CLI associated with the SBFD from the base station; A step of measuring an SRS (sounding reference signal)-RSRP (reference signal received power) resource or a CLI-RSSI (received signal strength indicator) resource based on the above CLI resource setting information; A step of receiving downlink control information (DCI) from the base station that directs an aperioditic CLI report; and A method comprising the step of transmitting a CLI report to the base station regarding a measured SRS-RSRP resource or CLI-RSSI resource based on the CLI report setting information.

2. In Claim 1, The CLI associated with the above SBFD exists for another terminal in the same cell as the terminal, or exists for another terminal in a different cell from the terminal, and If a CSI resource different from the CLI resource setting information is configured in the above CSI resource setting information, the configured CSI resource is ignored, and A method in which, if a CSI report different from the CLI report setting is set in the above CSI report setting information, the set CSI report is ignored.

3. In Claim 1, The above CLI resource configuration information indicates an aperiodi CLI resource, a semi-persistent CLI resource, or a periodic CLI resource, and A method in which the above-mentioned semi-static CLI resource is activated by a MAC (medium access control) CE (control element).

4. In Claim 3, A method comprising a field indicating the activation or deactivation of a CLI resource, a field indicating a cell index to which the MAC CE applies, a field indicating a bandwidth part (BWP) for a CLI resource to which the MAC CE applies, and a field indicating a CLI resource index to which activation is indicated.

5. In a wireless communication system, regarding a terminal (user equipment), At least one transceiver; At least one processor communicatively coupled to the above at least one transceiver; and It includes at least one memory that is communicationally coupled to the above at least one processor and stores instructions, and The above instructions are executed individually or in any combination by the above at least one processor, so that the terminal: Receive CSI resource configuration information including CLI resource configuration information for cross-link interference (CLI) associated with subband full duplex (SBFD) from a base station, and Receives CSI reporting setting information including CLI reporting setting information for a CLI associated with the SBFD from the base station, and Based on the above CLI resource setting information, measure the SRS (sounding reference signal)-RSRP (reference signal received power) resource or CLI-RSSI (received signal strength indicator) resource, and Receiving DCI (downlink control information) from the above base station directing an aperioditic CLI report, A terminal that, based on the CLI report setting information above, causes the base station to transmit a CLI report regarding a measured SRS-RSRP resource or CLI-RSSI resource.

6. In Claim 5, The CLI associated with the above SBFD exists for another terminal in the same cell as the terminal, or exists for another terminal in a different cell from the terminal, and If a CSI resource different from the CLI resource setting information is configured in the above CSI resource setting information, the configured CSI resource is ignored, and A terminal in which, if a CSI report different from the CLI report setting is set in the above CSI report setting information, the above-set CSI report is ignored.

7. In Claim 5, The above CLI resource configuration information indicates an aperiodi CLI resource, a semi-persistent CLI resource, or a periodic CLI resource, and The above quasi-static CLI resource is a terminal that is activated by a MAC (medium access control) CE (control element).

8. In Claim 7, A terminal comprising a field indicating the activation or deactivation of a CLI resource, a field indicating a cell index to which the MAC CE applies, a field indicating a bandwidth part (BWP) for a CLI resource to which the MAC CE applies, and a field indicating a CLI resource index to which activation is indicated.

9. A method performed by a base station in a wireless communication system, A step of transmitting CSI resource configuration information including CLI resource configuration information for cross-link interference (CLI) associated with subband full duplex (SBFD) to a terminal (user equipment); A step of transmitting to the terminal CSI reporting setting information including CLI reporting setting information for a CLI associated with the SBFD; The step of transmitting downlink control information (DCI) to the terminal instructing aperioditic CLI reporting; and The method includes the step of receiving a CLI report on an SRS-RSRP resource or a CLI-RSSI resource measured from the terminal, A method in which the above CLI resource configuration information is associated with an SRS (sounding reference signal)-RSRP (reference signal received power) resource or a CLI-RSSI (received signal strength indicator) resource.

10. In Claim 9, The CLI associated with the above SBFD exists for another terminal in the same cell as the terminal, or exists for another terminal in a different cell from the terminal, and If a CSI resource different from the CLI resource setting information is configured in the above CSI resource setting information, the configured CSI resource is ignored, and A method in which, if a CSI report different from the CLI report setting is set in the above CSI report setting information, the set CSI report is ignored.

11. In Claim 9, The above CLI resource configuration information indicates an aperiodi CLI resource, a semi-persistent CLI resource, or a periodic CLI resource, and A method in which the above-mentioned semi-static CLI resource is activated by a MAC (medium access control) CE (control element).

12. In Claim 11, A method comprising a field indicating the activation or deactivation of a CLI resource, a field indicating a cell index to which the MAC CE applies, a field indicating a bandwidth part (BWP) for a CLI resource to which the MAC CE applies, and a field indicating a CLI resource index to which activation is indicated.

13. In a base station of a wireless communication system, At least one transceiver; At least one processor communicatively coupled to the above at least one transceiver; and It includes at least one memory that is communicationally coupled to the above at least one processor and stores instructions, and The above instructions are executed individually or in any combination by the above at least one processor, so that the base station: Transmit CSI resource configuration information including CLI resource configuration information for CLI (cross link interference) associated with SBFD (subband full duplex) to the terminal (user equipment), and Transmits CSI reporting setting information including CLI reporting setting information for a CLI associated with the SBFD to the terminal, and Transmit downlink control information (DCI) instructing the above terminal to perform aperioditic CLI reporting, and To receive CLI reports regarding SRS-RSRP resources or CLI-RSSI resources measured from the above terminal, and The above CLI resource configuration information is associated with a base station, specifically with an SRS (sounding reference signal)-RSRP (reference signal received power) resource or a CLI-RSSI (received signal strength indicator) resource.

14. In Claim 13, The CLI associated with the above SBFD exists for another terminal in the same cell as the terminal, or exists for another terminal in a different cell from the terminal, and If a CSI resource different from the CLI resource setting information is configured in the above CSI resource setting information, the configured CSI resource is ignored, and A base station in which, if a CSI report different from the CLI report setting is set in the above CSI report setting information, the above-set CSI report is ignored.

15. In Claim 13, The above CLI resource configuration information indicates an aperiodi CLI resource, a semi-persistent CLI resource, or a periodic CLI resource, and The above quasi-static CLI resource is activated by the MAC (medium access control) CE (control element), and A base station comprising a field indicating the activation or deactivation of a CLI resource, a field indicating a cell index to which the MAC CE applies, a field indicating a bandwidth part (BWP) for a CLI resource to which the MAC CE applies, and a field indicating a CLI resource index to which activation is indicated.

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