Method for CLI measurement of SBFD slot in SBFD system, and apparatus therefor

Abstract

A method according to one embodiment of the present specification comprises the steps of: receiving a measurement configuration from a base station; and transmitting a measurement report message to the base station. The measurement configuration includes a configuration related to a cross link interference (CLI). The measurement report message includes information related to a CLI measurement. A resource for the CLI measurement is configured on the basis of resources in a time domain associated with subband full-duplex (SBFD).

Description

Method and apparatus for measuring CLI of an SBFD SLOT in an SBFD SYSTEM

[0001] This specification relates to a method and apparatus for measuring the CLI of an SBFD slot in an SBFD system.

[0002] Mobile communication systems were developed to provide voice services while ensuring user mobility. However, mobile communication systems have expanded their scope to include data services as well as voice. Currently, due to the explosive increase in traffic leading to resource shortages and users demanding higher-speed services, more advanced mobile communication systems are required.

[0003] The requirements for next-generation mobile communication systems largely include the ability to accommodate explosive data traffic, a dramatic increase in transmission rates per user, a significantly increased number of connected devices, very low end-to-end latency, and high energy efficiency. To achieve this, various technologies are being researched, such as dual connectivity, massive multiple input multiple output (MMIMO), in-band full duplex, non-orthogonal multiple access (NOMA), super wideband support, and device networking.

[0004] Meanwhile, according to the existing method, the amount of interference entering the Cross Link is determined by the average power of the received values ​​for each measurement resource in the SBFD (subband full-duplex) slot. Based on this, DL / UL resources are managed.

[0005] According to the aforementioned conventional method, the terminal reports the average power of the received signal to the base station for each measurement resource. Therefore, it is difficult to determine how far interference from the UL affects the area.

[0006] The purpose of this specification is to propose a method for solving the aforementioned problems.

[0007] The technical problems to be solved in this specification are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which this specification belongs from the description below.

[0008] A method according to one embodiment of the present specification includes the steps of receiving a measurement configuration from a base station and transmitting a measurement report message to the base station.

[0009] The above measurement settings include settings related to Cross Link Interference (CLI).

[0010] The above measurement report message includes information related to CLI measurement.

[0011] The resources for the above CLI measurement are characterized by being set based on resources within the time domain related to SBFD (SuBband Full-Duplex).

[0012] The above time domain may be based on one or more symbols within the SBFD slot.

[0013] One or more of the above symbols may be associated with DL-UL switching or DL-UL transition.

[0014] One or more of the above symbols may be based on a guard symbol placed between the DL symbol (downlink symbol) and the UL symbol (uplink symbol).

[0015] The resource for the above CLI measurement can be determined based on a PRB unit (Physical Resource Block, PRB, unit).

[0016] The above PRB unit can be indicated based on Downlink Control Information (DCI).

[0017] One or more resources related to the CLI measurement can be determined based on the PRB unit in the frequency domain of the resource based on the defined ID among the resources within the above time domain.

[0018] The time domain associated with the above SBFD may be determined based on i) a first time domain associated with the DL-UL switching within the SBFD slot and / or ii) a second time domain based on the Timing Advance (TA).

[0019] The above CLI measurement can be performed based on the remaining region from which the second time region is excluded in the first time region.

[0020] The above TA may be associated with other terminals. Information associated with the above TA may be indicated based on Downlink Control Information (DCI).

[0021] The above terminal may be a victim UE associated with the CLI measurement. The other terminal may be an aggressor UE associated with the CLI.

[0022] The information related to the above CLI measurement may include i) information related to CLI-RSSI (CLI-Received Signal Strength Indicator) and / or ii) information related to SRS-RSRP (Sounding Reference Signal-Reference Signal Received Power).

[0023] A terminal according to another embodiment of the present specification includes one or more transceivers, one or more processors for controlling the one or more transceivers, and one or more memories connected to the one or more processors for storing instructions.

[0024] The above instructions are characterized by causing the terminal to perform all steps of any one of the above methods based on execution by the one or more processors.

[0025] An apparatus according to another embodiment of the present specification comprises one or more memories and one or more processors functionally connected to the one or more memories. The one or more memories are characterized by storing instructions that cause the apparatus to perform all steps of any one of the methods based on execution by the one or more processors.

[0026] One or more non-transitory computer-readable storage media according to another embodiment of the present specification store instructions. The instructions, executable by one or more processors, are characterized by enabling a terminal to perform all steps of any one of the methods.

[0027] A method according to another embodiment of the present specification includes the steps of transmitting a measurement configuration to a terminal and receiving a measurement report message from the terminal.

[0028] The above measurement settings include settings related to Cross Link Interference (CLI).

[0029] The above measurement report message includes information related to CLI measurement.

[0030] The resources for the above CLI measurement are characterized by being set based on resources within the time domain related to SBFD (SuBband Full-Duplex).

[0031] A base station according to another embodiment of the present specification includes one or more transceivers, one or more processors for controlling the one or more transceivers, and one or more memories connected to the one or more processors for storing instructions.

[0032] The above instructions are characterized by causing the base station to perform all steps of the method based on execution by the one or more processors.

[0033] According to the embodiments of this specification, resources for CLI measurement are set based on a specific time domain, so that CLI caused by UL transmission from another terminal can be measured more accurately. In addition, SBFD slot-based DL / UL resource allocation can be performed more efficiently from the perspective of CLI. Furthermore, UL / DL transmission and reception performance based on SBFD resources can be improved compared to existing methods.

[0034] The effects obtainable in this specification are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description below.

[0035] FIG. 1 is a drawing illustrating an example of a communication system applicable to the present specification.

[0036] FIG. 2 is a drawing illustrating an example of a wireless device that can be applied to the present specification.

[0037] FIG. 3 is a diagram illustrating a method for processing a transmission signal applicable to the present specification.

[0038] FIG. 4 is a drawing illustrating another example of a wireless device to which the present specification applies.

[0039] FIG. 5 is a drawing illustrating an example of a portable device to which the present specification applies.

[0040] FIG. 6 is a diagram illustrating physical channels applicable to the present specification and a signal transmission method using them.

[0041] Figure 7 is a figure showing an example of a communication structure that can be provided in a 6G system.

[0042] Figure 8 is a diagram illustrating communication between a base station and a terminal operating in SBFD mode.

[0043] Figure 9 illustrates the structure of an SBFD slot.

[0044] Figure 10 illustrates a flexible frame structure having a TDD slot pattern.

[0045] Figure 11 is a diagram illustrating various interferences occurring in an SBFD system.

[0046] Figure 12 is a flowchart showing the CLI measurement procedure according to the existing method.

[0047] Figure 13 illustrates the CLI measurement and reporting procedure.

[0048] Figure 14 illustrates a CLI measurement and reporting procedure utilizing reference signal resources.

[0049] Figure 15 illustrates a CLI measurement and reporting procedure utilizing guard band resources.

[0050] FIG. 16 illustrates a CLI measurement resource in an SBFD slot according to an embodiment of the present specification.

[0051] Figure 17 is a diagram illustrating the concept of timing advance.

[0052] Figure 18 is a diagram illustrating the RRC procedure.

[0053] Figure 19 is a diagram illustrating the CLI reporting procedure.

[0054] FIG. 20 illustrates CLI measurement resource allocation according to an embodiment of the present specification.

[0055] FIG. 21 illustrates a PRB unit related to CLI measurement resource allocation according to an embodiment of the present specification.

[0056] FIG. 22 illustrates CLI measurement resource allocation based on PRB units according to an embodiment of the present specification.

[0057] FIG. 23 illustrates CLI measurement resource allocation based on TA according to an embodiment of the present specification.

[0058] FIG. 24 is a flowchart illustrating a method according to one embodiment of the present specification.

[0059] FIG. 25 is a flowchart illustrating a method according to another embodiment of the present specification.

[0060] The following embodiments are combinations of the components and features of this specification in a predetermined form. Each component or feature may be considered optional unless otherwise explicitly stated. Each component or feature may be implemented in a form not combined with other components or features. Additionally, some components and / or features may be combined to constitute the embodiments of this specification. The order of operations described in the embodiments of this specification may be changed. Some components or features of any embodiment may be included in another embodiment, or may be replaced with corresponding components or features of another embodiment.

[0061] In the description of the drawings, procedures or steps that could obscure the gist of the specification have not been described, nor have procedures or steps that are understandable to those skilled in the art been described.

[0062] Throughout the specification, when a part is described as "comprising" or "including" a component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Furthermore, terms such as "...part," "...unit," and "module" as used in the specification refer to a unit that performs at least one function or operation, and this may be implemented in hardware, software, or a combination of hardware and software. Additionally, "one (a or an)," "one," "the," and similar related terms may be used in the context describing this specification (particularly in the context of the following claims) to include both singular and plural forms, unless otherwise indicated in this specification or clearly contradicted by the context.

[0063] The embodiments of this specification have been described with a focus on the data transmission and reception relationship between a base station and a mobile station. Here, the base station refers to a terminal node of a network that communicates directly with a mobile station. Specific operations described herein as being performed by a base station may, in some cases, be performed by an upper node of the base station.

[0064] That is, in a network consisting of multiple network nodes including a base station, various operations performed for communication with a mobile station may be performed by the base station or other network nodes other than the base station. In this case, 'base station' may be replaced by terms such as fixed station, Node B, eNB (eNode B), gNB (gNode B), ng-eNB, advanced base station (ABS), or access point.

[0065] Additionally, in the embodiments of this specification, the term terminal may be replaced with terms such as user equipment (UE), mobile station (MS), subscriber station (SS), mobile subscriber station (MSS), mobile terminal, or advanced mobile station (AMS).

[0066] Furthermore, the transmitting end refers to a fixed and / or mobile node that provides data or voice services, and the receiving end refers to a fixed and / or mobile node that receives data or voice services. Therefore, in the case of the uplink, a mobile station can be the transmitting end and a base station can be the receiving end. Similarly, in the case of the downlink, a mobile station can be the receiving end and a base station can be the transmitting end.

[0067] The embodiments of this specification may be supported by standard documents disclosed in at least one of the wireless access systems, such as IEEE 802.xx systems, 3GPP (3rd Generation Partnership Project) systems, 3GPP LTE (Long Term Evolution) systems, 3GPP 5G (5th generation) NR (New Radio) systems and 3GPP2 systems, and in particular, the embodiments of this specification may be supported by the documents 3GPP TS (technical specification) 38.211, 3GPP TS 38.212, 3GPP TS 38.213, 3GPP TS 38.321 and 3GPP TS 38.331.

[0068] In addition, the embodiments of this specification may be applied to other wireless access systems and are not limited to the systems described above. For example, they may be applicable to systems applied after the 3GPP 5G NR system and are not limited to specific systems.

[0069] That is, obvious steps or parts not described in the embodiments of this specification may be described by referring to the aforementioned documents. Additionally, all terms disclosed in this specification may be explained by the aforementioned standard documents.

[0070] Hereinafter, preferred embodiments according to the present specification will be described in detail with reference to the accompanying drawings. The detailed description disclosed below, together with the accompanying drawings, is intended to describe exemplary embodiments of the present specification and is not intended to represent the only embodiment in which the technical configuration of the present specification can be implemented.

[0071] Additionally, specific terms used in the embodiments of this specification are provided to aid in understanding this specification, and the use of such specific terms may be modified in other forms without departing from the technical spirit of this specification.

[0072] The following technology can be applied to various wireless access systems such as CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), and SC-FDMA (single carrier frequency division multiple access).

[0073] For the sake of clarity in the following description, the explanation is based on 3GPP communication systems (e.g., LTE, NR, etc.), but the technical concept of the present invention is not limited thereto. LTE may refer to technology from 3GPP TS 36.xxx Release 8 onwards. Specifically, LTE technology from 3GPP TS 36.xxx Release 10 onwards is referred to as LTE-A, and LTE technology from 3GPP TS 36.xxx Release 13 onwards may be referred to as LTE-A pro. 3GPP NR may refer to technology from TS 38.xxx Release 15 onwards. 3GPP 6G may refer to technology from TS Release 17 and / or Release 18 onwards. "xxx" indicates a standard document detail number. LTE / NR / 6G may be collectively referred to as 3GPP systems.

[0074] Regarding the background technology, terms, abbreviations, etc. used in this specification, reference may be made to matters described in standard documents published prior to the present invention. For example, reference may be made to standard documents 36.xxx and 38.xxx.

[0075] Communication systems applicable to the present specification

[0076] Although not limited thereto, the various descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this specification may be applied to various fields requiring wireless communication / connection (e.g., 5G) between devices.

[0077] Examples are provided in more detail below with reference to the drawings. In the following drawings and descriptions, the same reference numerals may represent the same or corresponding hardware blocks, software blocks, or function blocks unless otherwise described.

[0078] FIG. 1 is a drawing illustrating an example of a communication system to which the present specification applies. Referring to FIG. 1, the communication system (100) to which the present specification applies includes a wireless device, a base station, and a network. Here, a wireless device refers to a device that performs communication using wireless access technology (e.g., 5G NR, LTE) and may be referred to as a communication / wireless / 5G device. Although not limited thereto, a wireless device may include a robot (100a), a vehicle (100b-1, 100b-2), an XR (extended reality) device (100c), a hand-held device (100d), a home appliance (100e), an IoT (Internet of Thing) device (100f), and an AI (artificial intelligence) device / server (100g). For example, a vehicle may include a vehicle equipped with wireless communication capabilities, an autonomous vehicle, a vehicle capable of performing inter-vehicle communication, etc. Here, the vehicle (100b-1, 100b-2) may include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device (100c) includes an augmented reality (AR) / virtual reality (VR) / mixed reality (MR) device and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) equipped in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, digital signage, a vehicle, a robot, etc. The portable device (100d) may include a smartphone, a smart pad, a wearable device (e.g., a smartwatch, smart glasses), a computer (e.g., a laptop, etc.). The home appliance (100e) may include a TV, a refrigerator, a washing machine, etc. The IoT device (100f) may include a sensor, a smart meter, etc.For example, the base station (120) and network (130) may also be implemented as wireless devices, and a specific wireless device (120a) may act as a base station / network node for other wireless devices.

[0079] Wireless devices (100a to 100f) can be connected to a network (130) through a base station (120). AI technology may be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (100g) through the network (130). The network (130) can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. The wireless devices (100a to 100f) may communicate with each other through the base station (120) / network (130), but they may also communicate directly (e.g., sidelink communication) without going through the base station (120) / network (130). For example, vehicles (100b-1, 100b-2) can communicate directly (e.g., V2V (vehicle to vehicle) / V2X (vehicle to everything) communication). Also, IoT devices (100f) (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0080] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (100a~100f) / base station (120) and between base station (120) / base station (120). Here, wireless communication / connection can be established through various wireless access technologies (e.g., 5G NR), such as uplink / downlink communication (150a), sidelink communication (150b) (or D2D communication), and communication between base stations (150c) (e.g., relay, IAB (integrated access backhaul)). Through wireless communication / connection (150a, 150b, 150c), wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to / from each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, based on the various proposals of this specification, at least some of the following may be performed: a process for setting various configuration information for transmitting / receiving wireless signals, a process for various signal processing (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), a resource allocation process, etc.

[0081] Communication systems applicable to the present specification

[0082] FIG. 2 is a drawing illustrating an example of a wireless device that can be applied to the present specification.

[0083] Referring to FIG. 2, the first wireless device (200a) and the second wireless device (200b) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR). Here, {the first wireless device (200a), the second wireless device (200b)} may correspond to {the wireless device (100x), the base station (120)} and / or {the wireless device (100x), the wireless device (100x)} of FIG. 1.

[0084] The first wireless device (200a) includes one or more processors (202a) and one or more memories (204a), and may additionally include one or more transceivers (206a) and / or one or more antennas (208a). The processor (202a) controls the memory (204a) and / or transceivers (206a) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or sequences of operation disclosed herein. For example, the processor (202a) may process information within the memory (204a) to generate a first information / signal and then transmit a wireless signal containing the first information / signal through the transceiver (206a). Additionally, the processor (202a) may receive a wireless signal containing a second information / signal through the transceiver (206a) and then store information obtained from the signal processing of the second information / signal in the memory (204a). Memory (204a) may be connected to the processor (202a) and may store various information related to the operation of the processor (202a). For example, memory (204a) may store software code including instructions for performing some or all of the processes controlled by the processor (202a) or for performing the descriptions, functions, procedures, proposals, methods, and / or sequences of operation disclosed in this specification. Here, the processor (202a) and memory (204a) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). A transceiver (206a) may be connected to the processor (202a) and may transmit and / or receive wireless signals through one or more antennas (208a). The transceiver (206a) may include a transmitter and / or receiver. The transceiver (206a) may be combined with an RF (radio frequency) unit. In this specification, a wireless device may refer to a communication modem / circuit / chip.

[0085] The second wireless device (200b) includes one or more processors (202b) and one or more memories (204b), and may additionally include one or more transceivers (206b) and / or one or more antennas (208b). The processor (202b) controls the memory (204b) and / or transceivers (206b) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or sequences of operation disclosed herein. For example, the processor (202b) may process information within the memory (204b) to generate a third information / signal and then transmit a wireless signal containing the third information / signal through the transceiver (206b). Additionally, the processor (202b) may receive a wireless signal containing a fourth information / signal through the transceiver (206b) and then store information obtained from the signal processing of the fourth information / signal in the memory (204b). The memory (204b) may be connected to the processor (202b) and may store various information related to the operation of the processor (202b). For example, the memory (204b) may store software code including instructions for performing some or all of the processes controlled by the processor (202b) or for performing the descriptions, functions, procedures, proposals, methods, and / or sequence diagrams of operation disclosed in this specification. Here, the processor (202b) and the memory (204b) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver (206b) may be connected to the processor (202b) and may transmit and / or receive wireless signals through one or more antennas (208b). The transceiver (206b) may include a transmitter and / or receiver. The transceiver (206b) may be used in combination with an RF unit. In this specification, a wireless device may refer to a communication modem / circuit / chip.

[0086] Hereinafter, hardware elements of the wireless device (200a, 200b) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (202a, 202b). For example, one or more processors (202a, 202b) may implement one or more layers (e.g., functional layers such as PHY (physical), MAC (media access control), RLC (radio link control), PDCP (packet data convergence protocol), RRC (radio resource control), and SDAP (service data adaptation protocol). One or more processors (202a, 202b) may generate one or more PDUs (Protocol Data Units) and / or one or more SDUs (service data units) according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed herein. One or more processors (202a, 202b) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this specification. One or more processors (202a, 202b) may generate a signal (e.g., baseband signal) including a PDU, SDU, message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this specification and provide it to one or more transceivers (206a, 206b). One or more processors (202a, 202b) may receive a signal (e.g., baseband signal) from one or more transceivers (206a, 206b) and may obtain a PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this specification.

[0087] One or more processors (202a, 202b) may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or more processors (202a, 202b) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in one or more processors (202a, 202b). Descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed herein may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. Firmware or software configured to perform the descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this specification may be included in one or more processors (202a, 202b) or stored in one or more memories (204a, 204b) and driven by one or more processors (202a, 202b). The descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this specification may be implemented using firmware or software in the form of code, instructions, and / or sets of instructions.

[0088] One or more memories (204a, 204b) may be connected to one or more processors (202a, 202b) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories (204a, 204b) may be composed of ROM (read-only memory), RAM (random access memory), EPROM (erasable programmable read-only memory), flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. One or more memories (204a, 204b) may be located inside and / or outside of one or more processors (202a, 202b). Additionally, one or more memories (204a, 204b) may be connected to one or more processors (202a, 202b) through various technologies such as wired or wireless connections.

[0089] One or more transceivers (206a, 206b) may transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or operation flowcharts, etc., of this specification to one or more other devices. One or more transceivers (206a, 206b) may receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or operation flowcharts, etc., disclosed in this specification from one or more other devices. For example, one or more transceivers (206a, 206b) may be connected to one or more processors (202a, 202b) and may transmit and receive wireless signals. For example, one or more processors (202a, 202b) may control one or more transceivers (206a, 206b) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (202a, 202b) may control one or more transceivers (206a, 206b) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (206a, 206b) may be connected to one or more antennas (208a, 208b), and one or more transceivers (206a, 206b) may be configured to transmit and receive user data, control information, wireless signals / channels, etc., as described in the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed herein through one or more antennas (208a, 208b). In this specification, one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports). One or more transceivers (206a, 206b) can convert the received wireless signal / channel, etc. from an RF band signal to a baseband signal in order to process the received user data, control information, wireless signal / channel, etc. using one or more processors (202a, 202b).One or more transceivers (206a, 206b) can convert user data, control information, wireless signals / channels, etc. processed using one or more processors (202a, 202b) from baseband signals to RF band signals. To this end, one or more transceivers (206a, 206b) may include (analog) oscillators and / or filters.

[0090] FIG. 3 is a diagram illustrating a method for processing a transmission signal applicable to the present specification. For example, the transmission signal may be processed by a signal processing circuit. In this case, the signal processing circuit (300) may include a scrambler (310), a modulator (320), a layer mapper (330), a precoder (340), a resource mapper (350), and a signal generator (360). In this case, for example, the operation / function of FIG. 3 may be performed in the processor (202a, 202b) and / or transceiver (206a, 206b) of FIG. 2. Also, for example, the hardware element of FIG. 3 may be implemented in the processor (202a, 202b) and / or transceiver (206a, 206b) of FIG. 2. For example, blocks 310 to 350 may be implemented in the processor (202a, 202b) of FIG. 2, and block 360 may be implemented in the transceiver (206a, 206b) of FIG. 2, but are not limited to the above-described embodiment.

[0091] A codeword can be converted into a wireless signal through the signal processing circuit (300) of FIG. 3. Here, the codeword is an encoded bit sequence of an information block. The information block may include a transmission block (e.g., UL-SCH transmission block, DL-SCH transmission block). The wireless signal may be transmitted through various physical channels (e.g., PUSCH, PDSCH) of FIG. 6. Specifically, the codeword can be converted into a scrambled bit sequence by a scrambler (310). The scrambled sequence used for scrambling is generated based on an initialization value, which may include ID information of a wireless device, etc. The scrambled bit sequence may be modulated into a modulation symbol sequence by a modulator (320). The modulation method may include pi / 2-BPSK (pi / 2-binary phase shift keying), m-PSK (m-phase shift keying), m-QAM (m-quadrature amplitude modulation), etc.

[0092] A complex modulation symbol sequence can be mapped to one or more transmission layers by a layer mapper (330). The modulation symbols of each transmission layer can be mapped to the corresponding antenna port(s) by a precoder (340) (precoding). The output z of the precoder (340) can be obtained by multiplying the output y of the layer mapper (330) by an N*M precoding matrix W, where N is the number of antenna ports and M is the number of transmission layers. Here, the precoder (340) can perform precoding after performing transform precoding (e.g., a discrete Fourier transform (DFT)) on the complex modulation symbols. Alternatively, the precoder (340) can perform precoding without performing transform precoding.

[0093] A resource mapper (350) can map the modulation symbols of each antenna port to a time-frequency resource. The time-frequency resource may include multiple symbols (e.g., CP-OFDMA symbols, DFT-s-OFDMA symbols) in the time domain and multiple subcarriers in the frequency domain. A signal generator (360) generates a radio signal from the mapped modulation symbols, and the generated radio signal can be transmitted to another device through each antenna. To this end, the signal generator (360) may include an inverse fast Fourier transform (IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analog converter (DAC), a frequency uplink converter, etc.

[0094] The signal processing process for a received signal in a wireless device can be configured as the inverse of the signal processing process (310–360) of FIG. 3. For example, a wireless device (e.g., 200a, 200b of FIG. 2) can receive a wireless signal from the outside through an antenna port / transceiver. The received wireless signal can be converted into a baseband signal through a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module. Subsequently, the baseband signal can be restored into a codeword through a resource de-mapper process, a postcoding process, a demodulation process, and a de-scrambling process. The codeword can be restored into the original information block through decoding. Accordingly, a signal processing circuit (not shown) for a received signal may include a signal restorer, a resource de-mapper, a postcoder, a demodulator, a de-scrambler, and a decoder.

[0095] Wireless device structure applicable to the present specification

[0096] FIG. 4 is a drawing illustrating another example of a wireless device to which the present specification applies.

[0097] Referring to FIG. 4, the wireless device (400) corresponds to the wireless device (200a, 200b) of FIG. 2 and may be composed of various elements, components, units / parts, and / or modules. For example, the wireless device (400) may include a communication unit (410), a control unit (420), a memory unit (430), and additional elements (440). The communication unit may include a communication circuit (412) and transceiver(s) (414). For example, the communication circuit (412) may include one or more processors (202a, 202b) and / or one or more memories (204a, 204b) of FIG. 2. For example, the transceiver(s) (414) may include one or more transceivers (206a, 206b) and / or one or more antennas (208a, 208b) of FIG. 2. The control unit (420) is electrically connected to the communication unit (410), the memory unit (430), and additional elements (440) and controls the general operation of the wireless device. For example, the control unit (420) may control the electrical / mechanical operation of the wireless device based on a program / code / command / information stored in the memory unit (430). Additionally, the control unit (420) may transmit information stored in the memory unit (430) to an external (e.g., another communication device) via a wireless / wired interface through the communication unit (410), or store information received from an external (e.g., another communication device) via a wireless / wired interface through the communication unit (410) in the memory unit (430).

[0098] The additional element (440) can be configured in various ways depending on the type of wireless device. For example, the additional element (440) may include at least one of a power unit / battery, an input / output unit, a driving unit, and a computing unit. Although not limited thereto, the wireless device (400) may be implemented in the form of a robot (Fig. 1, 100a), a vehicle (Fig. 1, 100b-1, 100b-2), an XR device (Fig. 1, 100c), a portable device (Fig. 1, 100d), a home appliance (Fig. 1, 100e), an IoT device (Fig. 1, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or financial device), a security device, a climate / environment device, an AI server / device (Fig. 1, 140), a base station (Fig. 1, 120), a network node, etc. Wireless devices can be used in a movable or fixed location depending on the use—e.g., service.

[0099] In FIG. 4, various elements, components, units / parts, and / or modules within the wireless device (400) may be entirely interconnected via a wired interface, or at least partially connected via a communication unit (410). For example, within the wireless device (400), the control unit (420) and the communication unit (410) may be connected via a wire, and the control unit (420) and the first unit (e.g., 430, 440) may be connected wirelessly via the communication unit (410). Additionally, each element, component, unit / part, and / or module within the wireless device (400) may include one or more additional elements. For example, the control unit (420) may be composed of one or more sets of processors. For example, the control unit (420) may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, a memory control processor, etc. As another example, the memory unit (430) may be composed of RAM, DRAM (dynamic RAM), ROM, flash memory, volatile memory, non-volatile memory and / or a combination thereof.

[0100] Mobile devices to which this specification applies

[0101] FIG. 5 is a drawing illustrating an example of a portable device to which the present specification applies.

[0102] FIG. 5 illustrates a portable device to which the present specification applies. The portable device may include a smartphone, a smartpad, a wearable device (e.g., a smart watch, smart glasses), a portable computer (e.g., a laptop, etc.). The portable device may be referred to as an MS (mobile station), UT (user terminal), MSS (mobile subscriber station), SS (subscriber station), AMS (advanced mobile station), or WT (wireless terminal).

[0103] Referring to FIG. 5, the portable device (500) may include an antenna unit (508), a communication unit (510), a control unit (520), a memory unit (530), a power supply unit (540a), an interface unit (540b), and an input / output unit (540c). The antenna unit (508) may be configured as part of the communication unit (510). Blocks 510 to 530 / 540a to 540c correspond to blocks 410 to 430 / 440 of FIG. 4, respectively.

[0104] The communication unit (510) can transmit and receive signals (e.g., data, control signals, etc.) with other wireless devices and base stations. The control unit (520) can control the components of the portable device (500) to perform various operations. The control unit (520) may include an application processor (AP). The memory unit (530) can store data / parameters / programs / code / commands required for the operation of the portable device (500). Additionally, the memory unit (530) can store input / output data / information, etc. The power supply unit (540a) supplies power to the portable device (500) and may include wired / wireless charging circuits, batteries, etc. The interface unit (540b) can support the connection between the portable device (500) and other external devices. The interface unit (540b) may include various ports (e.g., audio input / output ports, video input / output ports) for connection with external devices. The input / output unit (540c) can receive or output video information / signals, audio information / signals, data, and / or information input from a user. The input / output unit (540c) may include a camera, a microphone, a user input unit, a display unit (540d), a speaker and / or a haptic module, etc.

[0105] For example, in the case of data communication, the input / output unit (540c) acquires information / signals (e.g., touch, text, voice, image, video) input by the user, and the acquired information / signals can be stored in the memory unit (530). The communication unit (510) converts the information / signals stored in the memory into wireless signals and can directly transmit the converted wireless signals to another wireless device or to a base station. Additionally, the communication unit (510) can receive wireless signals from another wireless device or base station and then restore the received wireless signals to their original information / signals. The restored information / signals are stored in the memory unit (530) and then can be output in various forms (e.g., text, voice, image, video, haptic) through the input / output unit (540c).

[0106] Physical channels and general signal transmission

[0107] In a wireless access system, a terminal can receive information from a base station via a downlink (DL) and transmit information to a base station via an uplink (UL). The information transmitted and received by the base station and the terminal includes general data information and various control information, and various physical channels exist depending on the type and purpose of the information they transmit and receive.

[0108] FIG. 6 is a diagram illustrating physical channels applicable to the present specification and a signal transmission method using them.

[0109] When a terminal is turned on again after being turned off, or when it newly enters a cell, it performs initial cell search operations, such as synchronizing with the base station, in step S611. To do this, the terminal receives the primary synchronization channel (P-SCH) and secondary synchronization channel (S-SCH) from the base station to synchronize with the base station and obtain information such as the cell ID.

[0110] Subsequently, the terminal can obtain in-cell broadcast information by receiving a physical broadcast channel (PBCH) signal from the base station. Meanwhile, during the initial cell search phase, the terminal can check the downlink channel status by receiving a Downlink Reference Signal (DL RS). After completing the initial cell search, the terminal can obtain more specific system information by receiving the physical downlink control channel (PDCCH) and the physical downlink shared channel (PDSCH) based on the physical downlink control channel information in step S612.

[0111] Subsequently, the terminal may perform a random access procedure, such as steps S613 through S616, to complete the connection to the base station. To this end, the terminal transmits a preamble through a physical random access channel (PRACH) (S613) and receives a random access response (RAR) for the preamble through a physical downlink control channel and a corresponding physical downlink shared channel (S614). The terminal transmits a physical uplink shared channel (PUSCH) using scheduling information within the RAR (S615) and performs a contention resolution procedure, such as receiving a physical downlink control channel signal and a corresponding physical downlink shared channel signal (S616).

[0112] A terminal that has performed the procedure described above may subsequently perform the reception of a physical downlink control channel signal and / or a physical downlink shared channel signal (S617) and the transmission of a physical uplink shared channel (PUSCH) signal and / or a physical uplink control channel (PUCCH) signal (S618) as a general uplink / downlink signal transmission procedure.

[0113] Control information transmitted by a terminal to a base station is collectively referred to as uplink control information (UCI). UCI includes HARQ-ACK / NACK (hybrid automatic repeat and request acknowledgment / negative-ACK), SR (scheduling request), CQI (channel quality indication), PMI (precoding matrix indication), RI (rank indication), BI (beam indication) information, etc. In this case, UCI is generally transmitted periodically via PUCCH, but depending on the embodiment (e.g., when control information and traffic data need to be transmitted simultaneously), it may be transmitted via PUSCH. Additionally, the terminal may transmit UCI non-periodically via PUSCH in response to a request or instruction from the network.

[0114] Figure 7 is a figure showing an example of a communication structure that can be provided in a 6G system.

[0115] 6G systems are expected to have 50 times higher simultaneous wireless connectivity than 5G wireless communication systems. URLLC, a key feature of 5G, will become an even more dominant technology in 6G communication by providing end-to-end latency of less than 1ms. Unlike the frequently used area spectrum efficiency, 6G systems will exhibit significantly superior volume spectrum efficiency. 6G systems can provide very long battery life and advanced battery technologies for energy harvesting, meaning mobile devices in 6G systems will not require separate charging. New network characteristics in 6G may include the following.

[0116] - Satellite Integrated Network: 6G is expected to be integrated with satellites to provide a global mobile population. Integrating terrestrial, satellite, and airborne networks into a single wireless communication system is crucial for 6G.

[0117] - Connected Intelligence: Unlike previous generations of wireless communication systems, 6G is innovative and will update wireless evolution from "connected things" to "connected intelligence." AI can be applied at each stage of the communication process (or at each step of the signal processing described below).

[0118] - Seamless integration of wireless information and energy transfer: 6G wireless networks will transfer power to charge the batteries of devices such as smartphones and sensors. Therefore, wireless information and energy transfer (WIET) will be integrated.

[0119] - Ubiquitous Super 3D Connectivity: Connectivity to the network and core network functions of drones and very low Earth orbit satellites will create Super 3D connectivity in 6G ubiquitous.

[0120] Some general requirements regarding the new network characteristics of 6G mentioned above may be as follows.

[0121] - Small cell networks: The idea of ​​small cell networks was introduced to improve the quality of received signals in cellular systems as a result of increased throughput, energy efficiency, and spectrum efficiency. Consequently, small cell networks are an essential feature of communication systems for 5G and beyond 5G (5GB). Therefore, 6G communication systems also adopt the characteristics of small cell networks.

[0122] - Ultra-dense heterogeneous network: Ultra-dense heterogeneous networks will be another important characteristic of 6G communication systems. Multi-tier networks composed of heterogeneous networks improve overall QoS and reduce costs.

[0123] - High-capacity backhaul: Backhaul connections are characterized as high-capacity backhaul networks to support high-volume traffic. High-speed fiber optics and free-space optics (FSO) systems can be possible solutions to this problem.

[0124] - Radar technology integrated with mobile technology: High-precision localization (or location-based services) through communication is one of the functions of 6G wireless communication systems. Therefore, radar systems will be integrated with 6G networks.

[0125] - Softwarization and virtualization: Softwarization and virtualization are two important features that form the basis of the design process in 5GB networks to ensure flexibility, reconfigurability, and programmability. Additionally, billions of devices can be shared across a shared physical infrastructure.

[0126] Below, we examine a method to enable efficient DL / UL resource allocation in a subband slot of a sub-band duplex system. Specifically, this specification proposes a method for cross-link interference (CLI) measurement resource allocation and a procedure to improve transmission and reception performance by reallocating DL / UL resources based on a measurement report.

[0127] Below, we examine the background technology related to SBFD.

[0128] In a TDD system, allocating a limited time duration to the UL reduces UL coverage and increases feedback latency, thereby decreasing capability. To address these limitations, a subband non-overlapping full duplex (SBFD) system has been proposed, which separates the TDD carrier into subbands to enable simultaneous transmission and reception within the same slot. In this mode, the NB can operate alongside existing UEs through a flexible frame structure. The SBFD system divides the entire system bandwidth into multiple subbands, and all transmission and reception processes are performed based on these divided subbands. Subband-based transmission faces difficulties due to interference between subbands caused by Out-of-band Emission (OOBE).

[0129] Figure 8 is a diagram illustrating communication between a base station and a terminal operating in SBFD mode.

[0130] Referring to FIG. 8, it is assumed that a base station (NB) communicates with terminal A (UE (A)) and terminal B (UE (B)). To communicate with terminal A and terminal B, the base station uses a TDD configuration having one or more SBFD slots. A DL-only slot (D) is used only for DL ​​transmission, and a UL-only slot (U) is used only for UL transmission. X is an SBFD slot. Frequency resources in an SBFD slot can be used for both DL and UL.

[0131] The SBFD slot can have various structures. This will be explained below with reference to Fig. 9.

[0132] Figure 9 illustrates the structure of an SBFD slot. Referring to Figure 9, an SBFD slot having a DUD structure includes i) one UL subband at the center of the channel bandwidth, ii) two DL subbands on both sides of the channel bandwidth, and iii) a guard band between the DL subband and the UL subband. Additionally, an SBFD slot having a DU structure includes i) one UL subband at the bottom of the channel bandwidth, ii) one DL subband at the top of the channel bandwidth, and iii) a guard band between the DL subband and the UL subband.

[0133] A terminal that can apply SBFD configuration because the base station notifies the terminal that it is in SBFD mode is called an 'SBFD aware terminal (SBFD aware UE),' and a terminal that cannot apply SBFD configuration because the base station does not notify the terminal is called an 'SBFD unaware terminal (SBFD unaware UE).' The structure of the TDD slot pattern (DXXXU) will be explained below with reference to Fig. 10.

[0134] Figure 10 illustrates a flexible frame structure having a TDD slot pattern.

[0135] Referring to Fig. 10, DL transmission occurs in slot N and UL transmission occurs in slot N+4, and in slots N+1, N+2, and N+3 set with slot pattern X, terminals that recognize SBFD mode utilize the slots as SBFD slots, and terminals that do not recognize SBFD mode utilize the slots as flexible slots.

[0136] If recognized as a flexible slot, this slot is used as a DL-only or UL-only slot. For example, it can be assumed that Terminal A wants to operate primarily for DL, and Terminal B wants to operate primarily for UL. In this case, the slot pattern for Terminal A is 'DDDDU', and the slot pattern for Terminal B is 'DUUUU'. On the other hand, if recognized as an SBFD slot, the UL subband and DL subband do not overlap and exist in the same slot.

[0137] In the case of operation based on SBFD slots, adjacent channel leakage and cross-link interference (CLI) between terminals occur due to simultaneous transmission. This will be explained below with reference to Fig. 11.

[0138] Figure 11 is a diagram illustrating various interferences occurring in an SBFD system.

[0139] CLI is a factor that degrades the reception performance of the UE during the SBFD slot. In order to determine resource scheduling to optimize performance and reduce interference, the base station requires a procedure for measuring and reporting the CLI exerted by a terminal operating in UL on a terminal operating in DL during the SBFD slot.

[0140] Referring to Fig. 11, 11A is gNB self-interference, and 11B is gNB-to-gNB co-channel inter-subband CLI. 11C is inter-cell gNB-to-UE UL co-channel legacy interference. 11D is inter-cell gNB-to-UE DL co-channel legacy interference. 11E and 11F are inter-cell UE-to-UE co-channel inter-subband CLI.

[0141] Below, we examine in detail the problems with existing methods related to CLI measurement.

[0142] Figure 12 is a flowchart showing the CLI measurement procedure according to the existing method.

[0143] Specifically, FIG. 12 illustrates a procedure for calculating and reporting CLI between a base station and a terminal operating in SBFD mode.

[0144] In S1210, the terminal receives from the base station a measurement configuration for measuring cross-link interference (CLI) in the SBFD slot and a reporting configuration for reporting CLI.

[0145] In S1220, the terminal performs a measurement of the CLI on a measurement resource specified by the measurement configuration.

[0146] In S1230, the terminal reports the measured CLI to the base station according to the reporting configuration.

[0147] At this time, the CLI measurement / reporting procedure described above can be performed for each measurement resource. This will be explained below with reference to FIGS. 13 to 15.

[0148] 1. Measurement resource: CSI-IM, ZP CSI-RS

[0149] FIG. 13 illustrates a CLI measurement and reporting procedure. Specifically, FIG. 13 illustrates a CLI measurement and reporting procedure utilizing CSI-IM resources and / or ZP CSI-RS resources.

[0150] In a system operating in SBFD mode, i) channel state information-interference measurement (CSI-IM) resource and ii) zero-power channel state information reference signal (ZP CSI-RS) resource may be utilized as measurement resources for the terminal to measure CLI.

[0151] The above CSI-IM resource is based on a specially designated RE where actual data is not transmitted from the base station. The above ZP CSI-RS resource is based on an RE that has not been allocated power from the base station.

[0152] Based on the said resource, the terminal can accurately measure inter-UE interference or co-channel interference (CCI) by isolating it without affecting its own signal.

[0153] The base station transmits CSI-IM / ZP CSI-RS resource settings to the terminal for CLI measurement. The measurement resource location and CLI calculation method may vary depending on the CLI measurement configuration. The measurement resource location and CLI calculation for each configuration are explained in detail below.

[0154] Configuration 1

[0155] The terminal uses one CSI-IM / ZP CSI-RS resource configured within the SBFD slot. The terminal measures the average received power for the CSI-IM / ZP CSI-RS resource specified in the SBFD slot and determines it as the CLI.

[0156] Configuration 2

[0157] The terminal uses two CSI-IM / ZP CSI-RS resources. One of the two resources is configured in the downlink-only slot prior to the SBFD slot, and the other is configured in the SBFD slot. The terminal measures the average received power in the downlink-only slot and the average received power in the SBFD slot. The terminal determines the difference between the measured average received powers as the CLI.

[0158] 2. Measurement resource: reference signal

[0159] FIG. 14 illustrates a procedure for measuring and reporting CLI using a reference signal resource. In a system operating in SBFD mode, a reference signal resource can be used as a measurement resource for a terminal to measure CLI.

[0160] Referring to Fig. 14, the CLI measurement setting includes an enable information field that enables one of two CLI configuration options.

[0161] Configuration Option 1

[0162] If a base station determines that it needs to acquire a terminal's CLI measurement due to requirements such as network optimization or interference management, the base station sends a CLI measurement enable message to the terminal. Upon receiving the measurement enable message, the terminal performs the CLI measurement in accordance with the base station's instructions.

[0163] Configuration Option 2

[0164] The terminal measures the CLI based on the reference signal for each transport block received from the base station. When a reporting triggering event occurs, the terminal reports the measurement result to the base station.

[0165] The base station transmits a reference signal (e.g., DMRS, CSI-RS) from the reference signal resource of the SBFD slot configured in the CLI measurement setting to the terminal for CLI measurement. The base station additionally specifies and transmits a negligible cross-correlation sequence with low cross-correlation with the reference signal. The terminal performs a measurement on the reference signal resource. The CLI measurement setting includes a measurement options information field indicating one of the two measurement methods below.

[0166] Measurement Method 1

[0167] The terminal receives a sequence of signals for the reference signal resource of the SBFD slot. The terminal determines the CLI based on i) a specified cross-correlation sequence and ii) the correlation of the received signal sequence. The reference signal sequence transmitted by the base station includes at least one of the demodulation reference signal (DMRS) and the channel state information reference signal (CSI-RS).

[0168] Measurement Method 2

[0169] The terminal determines the expected sequence of received signals based on the estimated channel and the reference signal sequence transmitted by the base station. The terminal determines the difference between the actually received signal sequence and the expected received signal sequence as the CLI.

[0170] After measuring the CLI, the terminal transmits a CLI report to the base station based on the Uplink Control Information (UCI) resource according to the CLI report setting.

[0171] 3. measurement resource: guard band resource

[0172] FIG. 15 illustrates a procedure for measuring and reporting CLI using guard band resources. In a system operating in SBFD mode, a guard band resource between a UL resource and a DL resource can be utilized as a measurement resource for a terminal to measure CLI.

[0173] Referring to Fig. 15, the CLI measurement setting includes an enable information field that enables one of two CLI configuration options.

[0174] Configuration Option 1

[0175] When a base station determines that it needs to acquire a CLI measurement from a terminal due to requirements such as network optimization or interference management, the base station sends a CLI measurement enable message to the terminal. When the terminal receives the measurement enable message, the terminal performs a CLI measurement in accordance with the instructions of the base station. The terminal reports the measured CLI to the base station in the guard band between the UL BWP and DL BWP in the SBFD slot.

[0176] Configuration Option 2

[0177] The terminal continuously measures the CLI on the guard band between the UL and DL BWPs received from the base station in the SBFD slot. When a reporting triggering event occurs, the terminal reports the measurement result to the base station.

[0178] The terminal measures the average power of the signal received from the guard band resource of the SBFD slot and determines the CLI based on this. After measuring the CLI, the terminal transmits a CLI report to the base station based on the Uplink Control Information resource (UCI, resource) according to the CLI report setting.

[0179] < Problems with Existing Technology >

[0180] According to the conventional method described above, the amount of interference entering the Cross Link is determined based on the average power of the received values ​​for each measurement resource in the SBFD slot. The CLI determined in this manner alone is not sufficient to improve spectral flexibility between the DL subband and the UL subband. In other words, if only the CLI determined according to the above method is utilized, spectral flexibility between the DL subband and the UL subband can be improved only to a limited extent.

[0181] This specification proposes a method for solving the aforementioned problems. Specifically, this specification proposes i) cross-link interference (CLI) measurement resource allocation to enable efficient DL / UL resource allocation in a subband slot of a sub-band duplex system, and ii) a procedure to improve transmission and reception performance by readjusting DL / UL resources based on a measurement report. Embodiments proposed in this specification will be described in detail below with reference to FIGS. 16 to 23.

[0182] FIG. 16 illustrates a CLI measurement resource in an SBFD slot according to an embodiment of the present specification.

[0183] Referring to Fig. 16, in a system operating in SBFD mode, the guard band resource during the DL-UL switching gap of the SBFD slot can be utilized as a CLI measurement resource. During the DL-UL switching gap in the SBFD slot, only UL subband transmission occurs without a received signal. Therefore, the resources of the SBFD slot can be efficiently managed based on the CLI value of the UL subband signal measured in the guard band resource.

[0184] Figure 17 is a diagram illustrating the concept of timing advance.

[0185] The guard band resource during the DL-UL switching gap of the SBFD slot is utilized as a CLI measurement resource. Referring to FIG. 17, a specific guard time longer than the timing advance (TA) is required to align the timing of the DL and UL at the base station. The TA is used to control the UL transmission timing of each terminal. The specific guard time is called the DL-UL switching gap.

[0186] The base station measures the reception time of the UL transmitted from the terminal and sends an offset value to the TA to modify the transmission time of the UL so that the DL and UL can be further aligned. The TA is the electronic delay time (t prop ) and timing advance offset(t offset It is calculated based on ) (TA=2*t prop +t offset ). Here, t prop(Propagation delay) is the time required for a DL signal to reach the terminal from the base station, or the time required for a UL signal to reach the base station from the terminal. offset (timing advance offset) is the UE Rx to Tx switching delay. In Frequency Range 1 (FR1), t offset is defined as 13us, and t in frequency range 2 (FR2). offset It is defined as 7us. No guard time is required when transitioning from UL to DL. This is because DL and UL are aligned due to TA.

[0187] In a system operating in SBFD mode, a terminal operating in the DL subband can measure the amount of CLI coming from the UL during the DL-UL switching gap included in the SBFD slot and report it to the base station. This allows for efficient operation of resources in the DL subband and UL subband within the SBFD slot.

[0188] Figure 18 is a diagram illustrating the RRC procedure.

[0189] Referring to Fig. 18, when the terminal obtains synchronization between the base station and the terminal through cell search and RACH procedures while in the RRC IDLE state (mode) or RRC_INACTIVE state, the terminal's RRC state transitions to the RRC_CONNECTED state. When the terminal enters the RRC_CONNECTED state, the base station first checks the terminal's radio access capability information and generates an RRC Reconfiguration message to exchange data.

[0190] Figure 19 is a diagram illustrating the CLI reporting procedure.

[0191] In S1910, the base station transmits an RRC reconfiguration message (e.g., RRCReconfiguration message) to the terminal. In RRC_CONNECTED MODE, the base station transmits settings for CLI measurement to the terminal via the RRC reconfiguration message. Specifically, the RRC reconfiguration message may include i) measurement configuration (e.g., MeasObjectCLI in Table 1) and / or ii) report configuration (e.g., ReportConfig in Table 2).

[0192] More specifically, the above RRC reset message includes a higher-level parameter MeasConfig. The higher-level parameter MeasConfig may include a list of measurement targets (e.g., MeasObjectToAddModList) and a list of reporting settings (e.g., ReportConfigToAddModList). The list of measurement targets may include measObjectCLI. The list of reporting settings may include a reporting setting (e.g., ReportConfigNR).

[0193] In S1920, the terminal transmits an RRC reconfiguration complete message (e.g., RRCReconfigurationComplete message) to the base station. The RRC reconfiguration complete message is used to confirm the successful completion of the RRC connection reconfiguration.

[0194] In S1930, the terminal measures the CLI (Cross-Link Interference).

[0195] In S1940, the terminal transmits a measurement report message (e.g., MeasurementReport message) to the base station. For example, if the reportType based on the report setting is cli-Periodical, the terminal periodically transmits the measurement report message to the base station. For example, if the reportType based on the report setting is cli-EventTriggered, the transmission of the measurement report message is triggered based on the fact that the measured CLI value satisfies a specified condition. The measurement report message includes CLI-RSSI. More specifically, the measurement report message includes measurement results (e.g., MeasResults). The measurement results may include CLI measurement results (e.g., measResultCLI). The CLI measurement results may include i) SRS-RSRP (Reference Signal Received Power) and / or ii) CLI-RSSI (Received Signal Strength Indicator). For example, the CLI measurement results may include a first measurement result list associated with SRS-RSRP (e.g., MeasResultListSRS-RSRP) and / or a second measurement result list associated with CLI-RSSI (e.g., MeasResultListCLI-RSSI). Each measurement result list may include one or more measurement results. Each measurement result may include i) a resource ID (e.g., srs-ResourceId or rssi-ResourceId) and ii) a measurement value (e.g., srs-RSRP-Result or cli-RSSI-Result). For example, the MeasurementReport may be transmitted by being included in a UL-DCCH message. For example, the MeasurementReport may be transmitted based on PUSCH.

[0196]

[0197]

[0198]

[0199] Example 1)

[0200] FIG. 20 illustrates CLI measurement resource allocation according to an embodiment of the present specification.

[0201] Referring to FIG. 20, a guard resource during the DL-UL switching gap contained in an SBFD slot in an SBFD system can be allocated as a CLI measurement resource. The CLI measurement resource can be configured based on an existing RRC message (e.g., RRCReconfiguration message).

[0202] In this case, since the terminal reports the average power of the received signal to the base station for each measurement resource, it is difficult for the base station to determine how far the interference coming from the UL affects. A resource allocation method to solve this problem is explained with reference to FIGS. 21 and 22.

[0203] FIG. 21 illustrates a PRB unit related to CLI measurement resource allocation according to an embodiment of the present specification.

[0204] Referring to Fig. 21, the base station can operate guard resources by dividing them into more CLI measurement resources during the DL-UL switching gap. As the number of CLI measurement resources (e.g., CLI-RSSI-Resource) increases, the base station can perform radio resource monitoring and management more efficiently. The maximum number of CLI-RSSI-Resources defined previously is 64 (e.g., maxNrofCLI-RSSI-Resources=64). The maximum number of CLI-RSSI resources can be determined as one of 8, 16, 32, or 64 depending on the UE capability. However, as the number of measurement resources increases, the number of settings for each measurement resource (e.g., rssi-ResourceConfig) increases, resulting in overhead for the base station to generate RRC Reconfiguration messages and for the terminal to analyze them. Furthermore, since the maximum number of measurement resources that the terminal can support is fixed, there are limitations when the terminal attempts to report CLI measurement results in small PRB units and manage resources based on them. An embodiment for solving this is described with reference to FIG. 22.

[0205] FIG. 22 illustrates CLI measurement resource allocation based on PRB units according to an embodiment of the present specification.

[0206] To address the aforementioned problems (increased overhead due to the increase in the number of measurement resources and lack of flexibility due to the limit on the maximum number of measurement resources), the CLI-RSSI-Resource of the DL-UL switching gap may be considered to use specific rssi-ResourceId(s). For example, referring to FIG. 22, CLI-RSSI-Resources with rssi-ResourceIds 100 and 101 may be configured / defined between terminals / base stations to measure CLI during the DL-UL switching gap. The specific rssi-ResourceId(s) may be configured / instructed based on existing RRC messages (e.g., RRCReconfiguration message), new RRC messages, or DCI.

[0207] The base station may set / instruct a terminal operating in DL to a PRB unit (e.g., sbfdmeasPRBUnit) in the frequency domain to be measured during the DL-UL switching gap, taking into account UL subband allocation. For example, the PRB unit may be set based on RRC signaling (e.g., rssi-ResourceConfig in Table 1). For example, the PRB unit may be indicated based on DCI. The reason for transmitting the PRB unit via DCI is to allow the base station to dynamically change the measurement unit.

[0208] For example, if the reportType of reportConfig is cli-Periodical, the terminal can periodically send measurement report messages to the base station.

[0209] For example, if the reportType of reportConfig is cli-EventTriggered, the transmission of a measurement report message by the terminal can be triggered based on whether the measured CLI value satisfies the specified condition.

[0210] Based on the fact that the ID (e.g., rssi-ResourceId) of the measurement resource (CLI-RSSI-Resource) set through the RRCReconfiguration message is a value (e.g., 100, 101) set / defined for the CLI-RSSI-Resource for the DL-UL switching gap, the terminal can measure the CLI based on the said measurement resource (CLI-RSSI-Resource). Specifically, the terminal can measure the CLI in PRB units (sbfdmeasPRBUnit) within the CLI-RSSI-Resource for the DL-UL switching gap.

[0211] The above measurement report message may include measurement results. The measurement results may include i) a resource ID (e.g., rssi-ResourceId) and ii) CLI values ​​measured in PRB units (e.g., one or more CLI values ​​measured in PRB units starting from a lower PRB index within CLI-RSSI-Resource).

[0212] At this time, whether to use the rssi-ResourceId for CLI-RSSI-Resource to be applied during the DL-UL switching gap can be determined in the UE Capability Transfer step of the RRC procedure of Fig. 18. MeasAndMobParameters is defined as a UE capability information element. Parameters related to CLI measurement are defined in the MeasAndMobParameters. As shown in Table 4, a parameter indicating whether CLI measurement is supported during the DL-UL switching gap in the SBFD slot (e.g., Support_sbfdCliMeasure_DlUlSwichinggGap) can be added to MeasAndMobParameters.

[0213] Additionally, minsbfdDlUlSwitchingGaprssiResourceId may be additionally defined in the Multiplicity and type constraint definition. For example, the rssi-ResourceId for CLI-RSSI-Resource to be applied during the DL-UL switching gap may have a value greater than or equal to minsbfdDlUlSwitchinggGaprssiResourceId.

[0214]

[0215] When the base station receives a measurement report from a terminal, it determines the Out-of-band Emission (OOB) affected by the UL subband based on the CLI value reported in the measurement PRB unit of FIG. 16. The base station may perform the following operations for efficient resource management.

[0216] 1) Gap band resource refinement: The base station can efficiently readjust gap band resources based on CLI values ​​measured by terminals operating in DL. Based on CLI values ​​measured in PRB units within a measurement report message, the base station can determine the impact of CLI coming from the UL in PRB units and adjust the gap length on an upper / lower basis.

[0217] 2) Terminal Power Control: If the CLI measured by the terminal operating in DL (the CLI value coming from UL) is high, the base station can control the terminal's power as follows. Specifically, the base station can lower the power of the terminal operating in UL and increase the power of the terminal operating in DL. Conversely, if the CLI value coming from UL is low, the base station can increase the power of the terminal operating in UL and decrease the power of the terminal operating in DL. As described above, reception performance can be improved through efficient power control of the terminal in DL / UL.

[0218] Example 2)

[0219] Example 1 is a method for efficiently controlling a measurement resource in terms of frequency for measuring CLI during a DL-UL switching gap included in an SBFD slot. In Example 2 below, a method for efficiently controlling a measurement resource in terms of time for measuring CLI is examined with reference to FIG. 23.

[0220] FIG. 23 illustrates CLI measurement resource allocation based on TA according to an embodiment of the present specification.

[0221] Referring to FIG. 23, in order to align the timing of DL and UL at the base station in a system operating in SBFD mode, a terminal operating in the UL subband applies the TA received from the base station before the UL slot boundary and transmits an uplink signal to the base station at any point within the DL-UL switching gap. The terminal operating in the DL subband does not know the TA value used by the terminal operating in the UL subband. Excluding the time domain during the DL-UL switching gap in which UL transmission is performed based on the TA increases the accuracy of CLI measurement in the guard band resource. To this end, the base station can transmit the TA (sbfdmeasTAOffset) of the terminal operating in UL to the terminal operating in DL via DCI. At this time, the TA (sbfdmeasTAOffset) may be a value in the symbol unit.

[0222] For example, if the reportType of reportConfig is cli-Periodical, the terminal can periodically send measurement report messages to the base station.

[0223] For example, if the reportType of reportConfig is cli-EventTriggered, the transmission of a measurement report message by the terminal can be triggered based on whether the measured CLI value satisfies the specified condition.

[0224] At this time, the terminal measures the CLI by applying the TA (sbfdmeasTAOffset) indicated through the DCI to the nrofSymbol of the measurement resource (CLI-RSSI-Resource) for the DL-UL switching gap. Specifically, the CLI measurement is performed by reflecting the TA (sbfdmeasTAOffset) of the UL terminal included in the DCI to the nrofSymbol of the measurement resource (CLI-RSSI-Resource) for the DL-UL switching gap set through the RRCReconfiguration message.

[0225] For example, the time domain for the CLI measurement can be determined based on i) the number of symbols of the measurement resource (nrofSymbol) and ii) TA (sbfdmeasTAOffset). Specifically, the time domain for the CLI measurement can be determined by excluding the time domain based on TA (sbfdmeasTAOffset) from the time domain based on the number of symbols of the measurement resource (nrofSymbol) for the DL-UL switching gap.

[0226] At least one of the above-described embodiments 1) and / or 2) may be applied to the operation of a terminal / base station. For example, embodiment 1) or embodiment 2) may be applied to the operation of a terminal / base station. For example, embodiments 1) and 2) may be applied to the operation of a terminal / base station.

[0227] In terms of implementation, the operations of the terminal / base station according to the embodiments described above can be processed by the device of FIGS. 1 to 5 described above (e.g., the processor (202a, 202b) of FIG. 2).

[0228] In addition, the operations of the terminal / base station according to the above-described embodiment may be stored in memory (e.g., 204a, 204b of FIG. 2) in the form of instructions / programs (e.g., instructions, executable code) for driving at least one processor (e.g., processor (202a, 202b) of FIG. 2).

[0229] The embodiments described above will be explained in detail below with reference to FIGS. 24 and FIGS. 25 in terms of the operation of the terminal and base station. The methods described below are distinguished only for convenience of explanation, and it is obvious that a part of one method may be substituted with a part of another method or combined with one another and applied.

[0230] FIG. 24 is a flowchart illustrating a method according to one embodiment of the present specification.

[0231] Referring to FIG. 24, a method according to one embodiment of the present specification includes a measurement setting reception step (S2410) and a measurement report message transmission step (S2420).

[0232] In S2410, the terminal receives a measurement configuration (e.g., MeasConfig) from the base station.

[0233] For example, the measurement settings may include settings related to Cross Link Interference (CLI) (e.g., cli-ResourceConfig).

[0234] In S2420, the terminal sends a measurement report message to the base station.

[0235] For example, the above measurement report message may include information related to a CLI measurement (e.g., measResultCLI).

[0236] Resources for the CLI measurement may be set / defined based on at least one of the above-described Embodiment 1) and / or Embodiment 2). This will be explained in detail below.

[0237] According to one embodiment, the resources for the CLI measurement may be set based on resources within the time domain associated with SBFD (SuBband Full-Duplex).

[0238] For example, the time domain may be based on one or more symbols within an SBFD slot. As a specific example, referring to FIG. 22 / 23, the time domain may be based on a time domain based on nrofSymbol of rssi-Resource.

[0239] For example, one or more of the above symbols may be associated with DL-UL switching or DL-UL transition.

[0240] For example, the above one or more symbols may be based on guard symbols placed between DL symbols (downlink symbols) and UL symbols (uplink symbols). As a specific example, a UL-DL pattern based on a TDD slot configuration (Special Slot Configuration) may be defined as 10D+2G+2U. 'D' represents a DL symbol, 'G' represents a guard symbol, and 'U' represents a UL symbol. In this case, the above one or more symbols may be based on two guard symbols.

[0241] According to one embodiment, the resource for measuring the CLI may be determined based on a PRB unit (Physical Resource Block, PRB, unit). This embodiment may be based on the above-described embodiment 1).

[0242] For example, the above PRB unit may be indicated based on Downlink Control Information (DCI).

[0243] For example, one or more resources related to the CLI measurement may be determined based on the PRB unit in the frequency domain of a resource based on a defined ID among the resources within the time domain. As a specific example, referring to FIG. 22, four resources related to the CLI measurement may be determined based on the PRB unit (e.g., sbfdmeasPRBUnit) in the frequency domain (e.g., nrofPRB) of a resource based on a defined ID (e.g., rssi-ResourceId 100).

[0244] According to one embodiment, the time domain associated with the SBFD may be determined based on i) a first time domain associated with the DL-UL switching within the SBFD slot and / or ii) a second time domain based on the Timing Advance (TA). This embodiment may be based on the above-described embodiment 2).

[0245] For example, the CLI measurement can be performed based on the remaining area from which the second time area is excluded from the first time area. Referring to FIG. 23, the first time area is a time area based on nrofSymbol, and the second time area is a time area based on sbfdmeasTAOffset.

[0246] For example, the above TA may be associated with another terminal. Information associated with the above TA may be indicated based on Downlink Control Information (DCI). The information associated with the above TA (e.g., sbfdmeasTAOffset) may be a value representing the number of symbols.

[0247] For example, the terminal may be a victim UE associated with the CLI measurement. The other terminal may be an aggressor UE associated with the CLI.

[0248] According to one embodiment, the information related to the CLI measurement (e.g., MeasResultCLI) may include i) information related to CLI-RSSI (CLI-Received Signal Strength Indicator) (e.g., measResultListSRS-RSRP) and / or ii) information related to SRS-RSRP (Sounding Reference Signal-Reference Signal Received Power) (e.g., measResultListCLI-RSSI).

[0249] The operation based on S2410 to S2420 described above can be implemented by the device of FIG. 2. For example, a terminal (200a or 200b) can control one or more transceivers (206a or 206b) and / or one or more memories (204a or 204b) to perform the operation based on S2410 to S2420.

[0250] The embodiments described above will be explained in detail below in terms of base station operation.

[0251] S2510 to S2520 described below correspond to S2410 to S2420 described in FIG. 24. Considering the above correspondence, redundant descriptions are omitted. That is, the specific description of the base station operation described below can be replaced by the description / execution of FIG. 24 corresponding to the operation.

[0252] FIG. 25 is a flowchart illustrating a method according to another embodiment of the present specification.

[0253] Referring to FIG. 25, a method according to another embodiment of the present specification includes a measurement setting transmission step (S2510) and a measurement report message reception step (S2520).

[0254] In S2510, the base station transmits a measurement configuration (e.g., MeasConfig) to the terminal.

[0255] For example, the measurement settings may include settings related to Cross Link Interference (CLI) (e.g., cli-ResourceConfig).

[0256] In S2520, the base station receives a measurement report message from the terminal.

[0257] For example, the above measurement report message may include information related to a CLI measurement (e.g., measResultCLI).

[0258] According to one embodiment, the resources for the CLI measurement may be set based on resources within the time domain associated with SBFD (SuBband Full-Duplex).

[0259] Operations based on the above-described S2510 to S2520 can be implemented by the device of FIG. 2. For example, a base station (200a or 200b) may control one or more transceivers (206a or 206b) and / or one or more memories (204a or 204b) to perform operations based on S2510 to S2520.

[0260] Here, the wireless communication technology implemented in the wireless devices (200a, 200b) of this specification may include LTE, NR, and 6G, as well as Narrowband Internet of Things for low-power communication. For example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology and may be implemented according to standards such as LTE Cat NB1 and / or LTE Cat NB2, but is not limited to the names mentioned above. Additionally, or generally, the wireless communication technology implemented in the wireless devices (200a, 200b) of this specification may perform communication based on LTE-M technology. For example, LTE-M technology may be an example of LPWAN technology and may be referred to by various names such as eMTC (enhanced Machine Type Communication). For example, LTE-M technology may be implemented in at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and / or 7) LTE M, and is not limited to the names mentioned above. Additionally or generally, wireless communication technology implemented in the wireless devices (200a, 200b) of this specification may include at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) for low-power communication, and is not limited to the names mentioned above. As an example, ZigBee technology can create personal area networks (PANs) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and may be referred to by various names.

[0261] The embodiments described above are combinations of the components and features of this specification in a specific form. Each component or feature should be considered optional unless otherwise explicitly stated. Each component or feature may be implemented in a form not combined with other components or features. Additionally, it is possible to construct embodiments of this specification by combining some components and / or features. The order of operations described in the embodiments of this specification may be changed. Some components or features of one embodiment may be included in another embodiment, or may be replaced with corresponding components or features of another embodiment. It is obvious that embodiments may be constructed by combining claims that do not have an explicit citation relationship in the claims, or that they may be included as new claims through amendments made after filing.

[0262] Embodiments according to the present specification may be implemented by various means, e.g., hardware, firmware, software, or a combination thereof. In the case of implementation by hardware, an embodiment of the present invention 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, microprocessors, etc.

[0263] In the case of implementation by firmware or software, an embodiment of the present specification may be implemented in the form of a module, procedure, function, etc., that performs the functions or operations described above. The software code may be stored in memory and executed by a processor. The memory may be located inside or outside the processor and may exchange data with the processor by various known means.

[0264] It is obvious to those skilled in the art that this specification may be embodied in other specific forms without departing from the essential features of this specification. Accordingly, the detailed description set forth above should not be interpreted restrictively in all respects but should be considered illustrative. The scope of this specification shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of this specification are included within the scope of this specification.

Claims

1. Regarding the method, A step of receiving a measurement configuration from a base station; and The method includes the step of transmitting a measurement report message to the base station; The above measurement settings include settings related to Cross Link Interference (CLI), and The above measurement report message includes information related to CLI measurement, and A method characterized in that the resources for the above CLI measurement are set based on resources within the time domain related to SBFD (SuBband Full-Duplex).

2. In Paragraph 1, A method characterized in that the above time domain is based on one or more symbols within an SBFD slot.

3. In Paragraph 2, A method characterized in that one or more of the above symbols are related to DL-UL switching or DL-UL transition.

4. In Paragraph 2, A method characterized in that the above one or more symbols are based on a guard symbol placed between a DL symbol (downlink symbol) and a UL symbol (uplink symbol).

5. In Paragraph 1, A method characterized in that the resource for the above CLI measurement is determined based on a PRB unit (Physical Resource Block, PRB, unit).

6. In Paragraph 5, A method characterized in that the above PRB unit is indicated based on Downlink Control Information (DCI).

7. In Paragraph 5, A method characterized by determining one or more resources related to the CLI measurement based on the PRB unit in the frequency domain of a resource based on a defined ID among the resources within the time domain.

8. In Paragraph 1, A method characterized in that the time domain associated with the above SBFD is determined based on i) a first time domain associated with the DL-UL switching within the SBFD slot and / or ii) a second time domain based on the Timing Advance (TA).

9. In Paragraph 8, A method characterized in that the above CLI measurement is performed based on the remaining region from which the second time region is excluded from the first time region.

10. In Paragraph 8, The above TA is associated with another terminal, and A method characterized by the information related to the above TA being indicated based on Downlink Control Information (DCI).

11. In Paragraph 10, The above terminal is the victim UE associated with the above CLI measurement, and A method characterized in that the other terminal is an aggressor UE associated with the CLI.

12. In Paragraph 1, A method characterized by the above information related to the CLI measurement including i) information related to CLI-RSSI (CLI-Received Signal Strength Indicator) and / or ii) information related to SRS-RSRP (Sounding Reference Signal-Reference Signal Received Power).

13. In the terminal, One or more transmitters / receivers; One or more processors controlling the above one or more transceivers; and It includes one or more memories connected to the above one or more processors and storing instructions, A terminal characterized by the above instructions enabling the terminal to perform all steps of the method according to any one of claims 1 to 12, based on execution by the one or more processors.

14. An apparatus comprising one or more memories and one or more processors functionally connected to the one or more memories, An apparatus characterized in that the above one or more memories store instructions that cause the apparatus to perform all steps of the method according to any one of claims 1 to 12, based on execution by the above one or more processors.

15. In one or more non-transitory computer-readable storage media storing instructions, One or more non-transitory computer-readable storage media characterized by instructions executable by one or more processors such that the terminal performs all steps of the method according to any one of claims 1 to 12.

16. Regarding the method, A step of transmitting a measurement configuration to a terminal; and The method includes the step of receiving a measurement report message from the above terminal, wherein The above measurement settings include settings related to Cross Link Interference (CLI), and The above measurement report message includes information related to CLI measurement, and A method characterized in that the resources for the above CLI measurement are set based on resources within the time domain related to SBFD (SuBband Full-Duplex).

17. Regarding base stations, One or more transmitters / receivers; One or more processors controlling the above one or more transceivers; and It includes one or more memories connected to the above one or more processors and storing instructions, A base station characterized by the above instructions, based on execution by one or more processors, having the base station perform all steps of the method according to claim 16.

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