Method for exchanging information for sensing between base stations in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. In addition, the present disclosure relates to operations of a terminal and a base station in a wireless communication system. More specifically, the present invention relates to a method for operating a sensing system by a terminal and a base station, a method for activating and deactivating a communication system by using sensing information, and an apparatus capable of performing same.

Description

Method for exchanging information for sensing between base stations in a wireless communication system

[0001] The present disclosure relates to the operation of a terminal and a base station in a wireless communication system. Specifically, the present disclosure relates to a method for operating a sensing system between a base station and a terminal, a method for sharing information between base stations, and a device capable of performing the same.

[0002] 5G mobile communication technology defines a wide frequency band to enable fast transmission speeds and new services, and can be implemented not only in the sub-6GHz frequency band such as 3.5 gigahertz (3.5GHz), but also in the ultra-high frequency band called millimeter wave (mmWave) such as 28GHz and 39GHz ('Above 6GHz'). In addition, for 6G mobile communication technology, which is called the system after 5G communication (Beyond 5G), implementation in the terahertz band (for example, the 3 terahertz (3THz) band at 95GHz) is being considered to achieve a transmission speed that is 50 times faster than 5G mobile communication technology and an ultra-low latency time that is reduced to one-tenth.

[0003] In the early stages of 5G mobile communication technology, the goal is to support services and satisfy performance requirements for enhanced Mobile Broadband (eMBB), Ultra-Reliable Low-Latency Communications (URLLC), and massive Machine-Type Communications (mMTC). These include beamforming and massive MIMO to mitigate path loss of radio waves in ultra-high frequency bands and increase the transmission distance of radio waves, support for various numerologies (such as operation of multiple subcarrier intervals) and dynamic operation of slot formats for efficient use of ultra-high frequency resources, initial access technology to support multi-beam transmission and wideband, definition and operation of BWP (Bidth Part), new channel coding methods such as LDPC (Low Density Parity Check) codes for large-capacity data transmission and Polar Code for reliable transmission of control information, and L2 pre-processing (L2). Standardization has been made for network slicing, which provides dedicated networks specialized for specific services, and pre-processing.

[0004] Currently, discussions are underway to improve and enhance the initial 5G mobile communication technology, taking into account the services that 5G mobile communication technology was intended to support. In addition, physical layer standardization is underway for technologies such as V2X (Vehicle-to-Everything), which helps autonomous vehicles make decisions based on their location and status information and increases user convenience; NR-U (New Radio Unlicensed), which aims to ensure system operation in compliance with various regulatory requirements in unlicensed bands; NR terminal low-power consumption technology (UE Power Saving); Non-Terrestrial Network (NTN), which is direct terminal-to-satellite communication to secure coverage in areas where communication with terrestrial networks is impossible; and Positioning. Furthermore, research is underway on an integrated sensing and communication system using wireless communication and RF signals, as one of the advanced 5G and 6G mobile communication candidate technologies.

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

[0006] Once these 5G mobile communication systems are commercialized, an explosive increase in connected devices will be connected to the communication network, necessitating enhanced functionality and performance of 5G mobile communication systems and integrated operation of these connected devices. To this end, new research will be conducted on improving 5G performance and reducing complexity, supporting AI services, supporting metaverse services, and drone communications by utilizing eXtended Reality (XR), Artificial Intelligence (AI), and Machine Learning (ML) to efficiently support Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR).

[0007] In addition, the development of these 5G mobile communication systems includes new waveforms to ensure coverage in the terahertz band of 6G mobile communication technology, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), Array Antenna, and Large Scale Antenna, metamaterial-based lenses and antennas to improve the coverage of terahertz band signals, high-dimensional spatial multiplexing technology using Orbital Angular Momentum (OAM), Reconfigurable Intelligent Surface (RIS) technology, as well as full duplex technology to improve the frequency efficiency and system network of 6G mobile communication technology, satellite, AI (Artificial Intelligence) from the design stage and AI-based communication technology that realizes system optimization by internalizing end-to-end AI support functions, and ultra-high-performance communication and computing resources to provide services with complexity that exceeds the limits of terminal computing capabilities. It can serve as a basis for the development of next-generation distributed computing technologies that can be realized by utilizing them.

[0008] The disclosed embodiment is intended to provide a device and method capable of effectively providing sensing using a base station and / or a terminal in a mobile communication system.

[0009] In accordance with one embodiment of the present invention for achieving the above-described technical problem, a method performed by a first base station of a communication system comprises the steps of: transmitting a message including sensing-related information to a second base station; and receiving a response message to the message including the sensing-related information from the second base station, wherein the message including the sensing-related information includes at least one of cell-specific sensing resource configuration information of a first cell corresponding to the first base station, beam information applicable to sensing, sensing capability information, or feedback capability information, and wherein the response message includes at least one of response information for sharing the sensing-related information, cell-specific sensing resource configuration information of a second cell corresponding to the second base station, beam information applicable to sensing, sensing capability information, or feedback capability information.

[0010] In addition, a method performed by a terminal of a communication system comprises: receiving upper layer signaling including sensing resource information from a first base station; and receiving activation or deactivation information for sensing resources from the first base station, wherein the sensing resource information includes cell-specific sensing resource configuration information, and the activation or deactivation information for the sensing resources is characterized in that it indicates whether to activate or deactivate a sensing resource set by the cell-specific sensing resource configuration information.

[0011] In addition, in a first base station of a communication system, at least one transceiver; at least one processor communicatively connected to the at least one transceiver; and a memory communicatively connected to the at least one processor and storing instructions that are executable individually or in any combination by the at least one processor, such that the terminal transmits a message including sensing-related information to a second base station, and receives a response message to the message including the sensing-related information from the second base station, wherein the message including the sensing-related information includes at least one of cell-specific sensing resource configuration information of a first cell corresponding to the first base station, beam information applicable to sensing, sensing capability information, or feedback capability information, and the response message includes at least one of response information for sharing the sensing-related information, cell-specific sensing resource configuration information of the second cell corresponding to the second base station, beam information applicable to sensing, sensing capability information, or feedback capability information.

[0012] In addition, in a terminal of a communication system, at least one transceiver; at least one processor communicatively connected to the at least one transceiver; and a memory communicatively connected to the at least one processor and storing instructions that are executable individually or in any combination of the at least one processor, such that the terminal receives upper layer signaling including sensing resource information from a first base station, and receives activation or deactivation information for sensing resources from the first base station, wherein the sensing resource information includes cell-specific sensing resource configuration information, and the activation or deactivation information for the sensing resources indicates whether to activate or deactivate a sensing resource configured by the cell-specific sensing resource configuration information.

[0013] In addition, a method performed by a first base station of a communication system comprises the steps of: transmitting a message including sensing-related information to a second base station; and receiving a response message to the message including the sensing-related information from the second base station, wherein the message including the sensing-related information includes at least one of cell-specific sensing resource configuration information of a first cell corresponding to the first base station, beam information applicable to sensing, sensing capability information, or feedback capability information, and wherein the response message includes at least one of response information for sharing the sensing-related information, cell-specific sensing resource configuration information of the second cell corresponding to the second base station, beam information applicable to sensing, sensing capability information, or feedback capability information.

[0014] In addition, a method performed by a terminal of a communication system comprises: receiving upper layer signaling including sensing resource information from a first base station; and receiving activation or deactivation information for sensing resources from the first base station, wherein the sensing resource information includes cell-specific sensing resource configuration information, and the activation or deactivation information for the sensing resources is characterized in that it indicates whether to activate or deactivate a sensing resource set by the cell-specific sensing resource configuration information.

[0015] In addition, in a first base station of a communication system, at least one transceiver; at least one processor communicatively connected to the at least one transceiver; and a memory communicatively connected to the at least one processor and storing instructions executable individually or in any combination of the at least one processor, such that the terminal: transmits a message including sensing-related information to a second base station, and receives a response message to the message including the sensing-related information from the second base station; wherein the message including the sensing-related information includes at least one of cell-specific sensing resource configuration information of a first cell corresponding to the first base station, beam information applicable to sensing, sensing capability information, or feedback capability information, and the response message includes at least one of response information for sharing the sensing-related information, cell-specific sensing resource configuration information of the second cell corresponding to the second base station, beam information applicable to sensing, sensing capability information, or feedback capability information.

[0016] In addition, in a terminal of a communication system, at least one transceiver; at least one processor communicatively connected to the at least one transceiver; and a memory communicatively connected to the at least one processor and storing instructions that are executable individually or in any combination of the at least one processor, such that the terminal: receives upper layer signaling including sensing resource information from a first base station, and receives activation or deactivation information for sensing resources from the first base station; wherein the sensing resource information includes cell-specific sensing resource configuration information, and the activation or deactivation information for the sensing resource indicates whether to activate or deactivate a sensing resource configured by the cell-specific sensing resource configuration information.

[0017] The disclosed embodiment can provide a device and method capable of effectively performing sensing using a base station and / or a terminal in a mobile communication system.

[0018] FIG. 1 is a diagram illustrating an example of the basic structure of the time-frequency domain, which is a radio resource domain in which data or control channels of a 5G system are transmitted.

[0019] FIG. 2 is a diagram illustrating an example of a frame, subframe, and slot structure in a 5G system.

[0020] Figure 3 is a diagram illustrating an example of bandwidth portion settings in a 5G system.

[0021] FIG. 4 is a diagram illustrating an example of a control region in which a downlink control channel is transmitted in a 5G system.

[0022] FIG. 5 is a diagram illustrating an example of a basic unit of time and frequency resources that constitute a downlink control channel that can be used in a 5G system.

[0023] Figure 6 is a diagram illustrating an example of frequency-axis resource allocation of PDSCH in a 5G system.

[0024] FIG. 7 is a diagram illustrating an example of time axis resource allocation of PDSCH in a 5G system.

[0025] FIG. 8 is a diagram illustrating an example of time-domain resource allocation according to the subcarrier spacing of a data channel and a control channel in a 5G system.

[0026] FIG. 9 is a diagram illustrating an example of a sensing method and mode according to a sensing transmitter and receiver of an ISAC system according to one embodiment of the present disclosure.

[0027] FIG. 10 is a diagram illustrating an example of a method for configuring an ISAC system according to one embodiment of the present disclosure.

[0028] FIG. 11 is a diagram illustrating an example of how sensing system resources are operated in a TDD band of an ISAC system according to one embodiment of the present disclosure.

[0029] FIG. 12 is a diagram illustrating an example of a method for setting sensing time / frequency resources for operating a sensing system according to one embodiment of the present disclosure.

[0030] FIG. 13 is a diagram illustrating an example of a method for activating / deactivating a sensing resource according to one embodiment of the present disclosure.

[0031] FIG. 14 is a diagram illustrating an example of a base station-to-base station bistatic sensing operation within an ISAC system according to one embodiment of the present disclosure.

[0032] FIG. 15 is a diagram illustrating an example of a base station-to-base station bistatic sensing operation within an ISAC system according to one embodiment of the present disclosure.

[0033] FIG. 16 is a diagram illustrating an example of a message exchange and signaling method for base station-to-base station bistatic sensing operation within an ISAC system according to one embodiment of the present disclosure.

[0034] FIG. 17 is a diagram illustrating an example of a method by which a sensing transmission base station triggers sensing according to one embodiment of the present disclosure.

[0035] FIG. 18 is a diagram illustrating an example of a method by which a sensing receiving base station triggers sensing according to one embodiment of the present disclosure.

[0036] FIG. 19 is a diagram illustrating an example of a method for a third base station to trigger sensing according to one embodiment of the present disclosure.

[0037] FIG. 20 is a diagram illustrating the structure of a terminal in a wireless communication system according to one embodiment of the present disclosure.

[0038] FIG. 21 is a diagram illustrating the structure of a base station in a wireless communication system according to one embodiment of the present disclosure.

[0039] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings.

[0040] In describing the embodiments, descriptions of technical details that are well known in the technical field to which the present disclosure pertains and are not directly related to the present disclosure will be omitted. This is to avoid obscuring the gist of the present disclosure by omitting unnecessary explanations and to convey the gist more clearly.

[0041] For the same reason, some components in the attached drawings are exaggerated, omitted, or schematically depicted. Furthermore, the dimensions of each component do not entirely reflect its actual size. Identical or corresponding components in each drawing are assigned the same reference numbers.

[0042] The advantages and features of the present disclosure, and methods for achieving them, will become clearer with reference to the embodiments described below in detail together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below and may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present disclosure is complete and to fully inform those skilled in the art of the scope of the disclosure, and the present disclosure is defined only by the scope of the claims. Like reference numerals designate like elements throughout the specification. In addition, when describing the present disclosure, if a specific description of a related function or configuration is determined to unnecessarily obscure the gist of the present disclosure, the detailed description thereof will be omitted. In addition, the terms described below are terms defined in consideration of the functions of the present disclosure, and these may vary depending on the intention or custom of the user or operator. Therefore, their definitions should be made based on the contents throughout the specification.

[0043] Hereinafter, the base station is an entity that performs resource allocation of a terminal, and may be at least one of a gNode B, an eNode B, a Node B, a BS (base station), a wireless access unit, a base station controller, or a node on a network. The terminal may include a UE (user equipment), an MS (mobile station), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing a communication function. In the present disclosure, downlink (DL) refers to a wireless transmission path of a signal transmitted from a base station to a terminal, and uplink (UL) refers to a wireless transmission path of a signal transmitted from a terminal to a base station. In addition, although an LTE (Long-Term Evolution) or LTE-A (LTE-advanced) system may be described below as an example, embodiments of the present disclosure may also be applied to other communication systems having a similar technical background or channel type. For example, this may include the fifth-generation mobile communication technology (5G, new radio, NR) developed after LTE-A. The term "5G" below may also encompass existing LTE, LTE-A, and other similar services. Furthermore, the present disclosure may be applied to other communication systems with some modifications, as determined by a person with skilled technical knowledge, without significantly departing from the scope of the present disclosure.

[0044] At this time, it will be understood that each block of the processing flowchart drawings and combinations of the flowchart drawings can be performed by computer program instructions. These computer program instructions can be installed in a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing equipment, so that the instructions executed by the processor of the computer or other programmable data processing equipment create a means for performing the functions described in the flowchart block(s). These computer program instructions can also be stored in a computer-available or computer-readable memory that can direct a computer or other programmable data processing equipment to implement the functions in a specific manner, so that the instructions stored in the computer-available or computer-readable memory can also produce a manufactured item that includes an instruction means for performing the functions described in the flowchart block(s). Since the computer program instructions may be installed on a computer or other programmable data processing device, a series of operational steps may be performed on the computer or other programmable data processing device to create a computer-executable process, and the instructions that cause the computer or other programmable data processing device to perform the steps for performing the functions described in the flowchart block(s) may also provide steps for performing the functions described in the flowchart block(s).

[0045] Additionally, each block may represent a module, segment, or portion of code that contains one or more executable instructions for performing a specific logical function(s). It should also be noted that in some alternative implementation examples, the functions described in the blocks may occur out of order. For example, two blocks depicted in succession may actually be executed substantially concurrently, or the blocks may sometimes be executed in reverse order, depending on their respective functions.

[0046] Here, the term '~ unit' used in this embodiment means software or hardware components such as FPGA (field programmable gate array) or ASIC (application specific integrated circuit), and the '~ unit' performs certain roles. However, the '~ unit' is not limited to software or hardware. The '~ unit' may be configured to be on an addressable storage medium or may be configured to play one or more processors. Accordingly, as an example, the '~ unit' includes components such as software components, object-oriented software components, class components, and task components, processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functions provided within the components and '~ units' may be combined into a smaller number of components and '~ units' or further separated into additional components and '~ units'. In addition, the components and '~parts' may be implemented to play one or more central processing units (CPUs) within the device or secure multimedia card. Also, in an embodiment, the '~part' may include one or more processors.

[0047] Hereinafter, A / B may mean A and / or B.

[0048] Wireless communication systems are evolving from providing voice-oriented services in the early days to broadband wireless communication systems that provide high-speed, high-quality packet data services, such as communication standards such as 3GPP's HSPA (High Speed ​​Packet Access), LTE (E-UTRA (Evolved Universal Terrestrial Radio Access)), LTE-Advanced (LTE-A), LTE-Pro, 3GPP2's HRPD (High Rate Packet Data), UMB (Ultra Mobile Broadband), and IEEE's 802.16e.

[0049] The LTE system, a representative example of the above-mentioned broadband wireless communication system, employs the orthogonal frequency division multiplexing (OFDM) method in the downlink and the single carrier frequency division multiple access (SC-FDMA) method in the uplink. The above-mentioned multiple access method is typically allocated and operated so that the time-frequency resources for transmitting data or control information to each user do not overlap, that is, so as to achieve orthogonality, thereby enabling each user's data or control information to be distinguished.

[0050] As a future communication system beyond LTE, 5G communication systems must be able to freely reflect the diverse needs of users and service providers. Therefore, they must support services that simultaneously satisfy these diverse requirements. Services being considered for 5G communication systems include enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low-latency communication (URLLC).

[0051] eMBB aims to provide data transmission rates that are significantly higher than those supported by existing LTE, LTE-A, or LTE-Pro. For example, in a 5G communication system, eMBB must be able to support a peak data rate of 20 Gbps in the downlink and a peak data rate of 10 Gbps in the uplink from a single base station. Furthermore, 5G communication systems must simultaneously provide the peak data rate and an increased user-perceived data rate for terminals. To meet these requirements, improvements in various transmission and reception technologies, including improved multi-input, multi-output (MIMO) transmission technology, are required. Furthermore, while LTE transmits signals using a maximum 20 MHz transmission bandwidth in the 2 GHz band, 5G communication systems can meet the data transmission rates required by 5G communication systems by utilizing a wider frequency bandwidth than 20 MHz in the 3-6 GHz or higher 6 GHz bands.

[0052] At the same time, mMTC is being considered to support application services such as the Internet of Things (IoT) in 5G communication systems. To efficiently provide the Internet of Things, mMTC requires support for large-scale terminal connection within a cell, improved terminal coverage, improved battery life, and reduced terminal costs. The Internet of Things provides communication functions by attaching various sensors and various devices, so a large number of terminals (e.g., 1,000,000 terminals / km) are required within a cell. 2 ) must be able to support. Furthermore, terminals supporting mMTC are likely to be located in shadow areas not covered by cells, such as basements of buildings, due to the nature of the service, and thus may require wider coverage than other services provided by 5G communication systems. Terminals supporting mMTC must be composed of low-cost terminals, and because it is difficult to frequently replace the terminal's battery, a very long battery life time, such as 10 to 15 years, may be required.

[0053] Finally, URLLC refers to a cellular-based wireless communication service used for a specific purpose (mission-critical). For example, services such as remote control of robots or machinery, industrial automation, unmanaged aerial vehicles, remote health care, and emergency alerts can be considered. Therefore, the communication provided by URLLC must provide very low latency and very high reliability. For example, a service supporting URLLC must satisfy an air interface latency of less than 0.5 milliseconds and at the same time, a 10 -5The following packet error rate requirements apply. Therefore, for services supporting URLLC, 5G systems must provide a smaller transmit time interval (TTI) than other services, while simultaneously requiring design considerations such as allocating a wide range of resources in the frequency band to ensure communication link reliability.

[0054] The three services of a 5G system—eMBB, URLLC, and mMTC—can be multiplexed and transmitted within a single system. To meet the differing requirements of each service, different transmission and reception techniques and parameters can be used. Of course, 5G is not limited to the three services described above.

[0055] Below, the frame structure of the 5G system is described in more detail with reference to drawings.

[0056] FIG. 1 is a diagram illustrating an example of the basic structure of the time-frequency domain, which is a radio resource domain in which data or control channels of a 5G system are transmitted.

[0057] The horizontal axis of Figure 1 represents the time domain, and the vertical axis represents the frequency domain. The basic unit of resources in the time and frequency domains is a resource element (RE, 101), which can be defined as 1 OFDM symbol (102) in the time axis and 1 subcarrier (or subcarrier, 103) in the frequency axis. In the frequency domain (For example, 12) consecutive REs can form one resource block (RB, 104).

[0058] FIG. 2 is a diagram illustrating an example of a frame, subframe, and slot structure in a 5G system.

[0059] Figure 2 illustrates an example of a structure of a frame (frame, 200), a subframe (subframe, 201), and a slot (slot, 202). One frame (200) can be defined as 10 ms. One subframe (201) can be defined as 1 ms, and therefore one frame (200) can be composed of a total of 10 subframes (201). One slot (202, 203) can be defined as 14 OFDM symbols (i.e., the number of symbols per slot ( )=14). 1 subframe (201) may be composed of one or more slots (202, 203), and the number of slots (202, 203) per 1 subframe (201) may vary depending on the setting value μ (204, 205) for the subcarrier spacing. In the example of Fig. 2, the cases where μ = 0 (204) and μ = 1 (205) as the subcarrier spacing setting value are illustrated. When μ = 0 (204), 1 subframe (201) may be composed of 1 slot (202), and when μ = 1 (205), 1 subframe (201) may be composed of 2 slots (203). That is, the number of slots per 1 subframe ( ) may vary, and accordingly the number of slots per frame ( ) may vary. Depending on the subcarrier spacing setting μ and can be defined as shown in Table 1 below.

[0060] μ 0141011142022144043148084141601651432032

[0061] Next, the bandwidth part (BWP) setting in the 5G system will be explained in detail with reference to the drawing.

[0062] Figure 3 is a diagram illustrating an example of bandwidth portion settings in a 5G system.

[0063] Figure 3 shows an example in which the UE bandwidth (300) is set to two bandwidth portions, namely, bandwidth portion #1 (BWP#1, 301) and bandwidth portion #2 (BWP#2, 302). The base station can set one or more bandwidth portions to the UE, and can set information for each bandwidth portion as shown in Table 2 below.

[0064] BWP ::= SEQUENCE {bwp-Id BWP-Id,(bandwidth part identifier)locationAndBandwidth INTEGER (1..65536),(bandwidth part location)subcarrierSpacing ENUMERATED {n0, n1, n2, n3, n4, n5},(subcarrier spacing)cyclicPrefix ENUMERATED { extended}(cyclic prefix)}

[0065] Of course, the above example is not limited, and in addition to the above configuration information, various parameters related to the bandwidth portion may be configured for the terminal. The above information may be transmitted from the base station to the terminal via upper layer signaling, for example, radio resource control (RRC) signaling. At least one of the configured bandwidth portions may be activated. Whether or not the configured bandwidth portion is activated may be semi-statically transmitted from the base station to the terminal via RRC signaling or dynamically transmitted via downlink control information (DCI).

[0066] According to some embodiments, a terminal before RRC connection can receive an initial bandwidth portion (initial BWP) for initial access from a base station through a master information block (MIB). More specifically, the terminal can receive configuration information about a control resource set (CORESET) and a search space on which a physical downlink control channel (PDCCH) for receiving system information (which may correspond to remaining system information, RMSI or system information block 1, SIB1) required for initial access can be transmitted through the MIB received on a physical broadcast channel (PBCH) during the initial access phase.

[0067] The control region and search space set by MIB can each be regarded as identifier (ID) 0. The base station can notify the terminal of configuration information such as frequency allocation information, time allocation information, and numerology for control region #0 through MIB. In addition, the base station can notify the terminal of configuration information for monitoring cycle and occasion for control region #0, i.e. configuration information for search space #0, through MIB. The terminal can regard the frequency region set as control region #0 obtained from MIB as the initial bandwidth part for initial access. At this time, the identifier (ID) of the initial bandwidth part can be regarded as 0. In addition to the purpose of receiving SIB, the initial bandwidth part can also be utilized for other system information (OSI), paging, and random access.

[0068] Next, we will explain the SS (synchronization signal) / PBCH block in 5G.

[0069] An SS / PBCH block may refer to a physical layer channel block consisting of a PSS (primary SS), SSS (secondary SS), and PBCH. Specifically, it is as follows.

[0070] - PSS: A signal that serves as a reference for downlink time / frequency synchronization and provides some information about the cell ID.

[0071] - SSS: It serves as a reference for downlink time / frequency synchronization and provides remaining cell ID information not provided by PSS. Additionally, it can serve as a reference signal for PBCH demodulation.

[0072] - PBCH: Provides essential system information required for the terminal's data channel and control channel transmission and reception. Essential system information may include search space-related control information indicating radio resource mapping information for the control channel, and scheduling control information for a separate data channel that transmits system information.

[0073] - SS / PBCH Block: An SS / PBCH block is composed of a combination of PSS, SSS, and PBCH. One or more SS / PBCH blocks can be transmitted within a 5ms period, and each transmitted SS / PBCH block can be distinguished by an index.

[0074] The terminal can detect PSS and SSS in the initial access stage, and decode PBCH. It can obtain MIB from PBCH and set CORESET#0 (which may correspond to a control region with a control region index of 0) therefrom. The terminal can monitor control region#0 assuming that the selected SS / PBCH block and the DMRS (demodulation reference signal) transmitted in control region#0 are quasi-co-located (QCL). The terminal can receive system information through downlink control information transmitted in control region#0. The terminal can obtain RACH (random access channel) related configuration information required for initial access from the received system information. The terminal can transmit PRACH (physical RACH) to the base station considering the selected SS / PBCH index, and the base station receiving the PRACH can obtain information on the SS / PBCH block index selected by the terminal. The base station can know that the terminal has selected a block among each SS / PBCH block and monitors the control region #0 associated with it.

[0075]

[0076] Next, we will specifically explain downlink control information (DCI) in the 5G system.

[0077] In a 5G system, scheduling information for uplink data (or physical uplink shared channel, PUSCH) or downlink data (or physical downlink shared channel, PDSCH) is transmitted from a base station to a terminal via DCI. The terminal can monitor a fallback DCI format and a non-fallback DCI format for the PUSCH or PDSCH. The fallback DCI format can be composed of fixed fields defined between the base station and the terminal, and the non-fallback DCI format can include configurable fields.

[0078] DCI can be transmitted over the physical downlink control channel (PDCCH) after going through the channel coding and modulation process. A cyclic redundancy check (CRC) is attached to the DCI message payload, and the CRC can be scrambled with a radio network temporary identifier (RNTI) corresponding to the identity of the UE. Different RNTIs can be used depending on the purpose of the DCI message, such as UE-specific data transmission, power control command, or random access response. That is, the RNTI is not transmitted explicitly, but is included in the CRC calculation process. When the UE receives a DCI message transmitted over the PDCCH, it verifies the CRC using the assigned RNTI. If the CRC verification result is correct, the UE can determine that the message was transmitted to the UE.

[0079] For example, a DCI scheduling a PDSCH for system information (SI) may be scrambled with SI-RNTI. A DCI scheduling a PDSCH for a random access response (RAR) message may be scrambled with RA-RNTI. A DCI scheduling a PDSCH for a paging message may be scrambled with P-RNTI. A DCI notifying a slot format indicator (SFI) may be scrambled with SFI-RNTI. A DCI notifying a transmit power control (TPC) may be scrambled with TPC-RNTI. A DCI scheduling a UE-specific PDSCH or PUSCH may be scrambled with C-RNTI (cell RNTI).

[0080] DCI format 0_0 can be used as a fallback DCI for scheduling PUSCH, in which case the CRC can be scrambled with C-RNTI. DCI format 0_0 with the CRC scrambled with C-RNTI can include, for example, the information in Table 3.

[0081] - Identifier for DCI formats - [1] bit- Frequency domain resource assignment - [ ] bits- Time domain resource assignment - X bits- Frequency hopping flag - 1 bit.- Modulation and coding scheme - 5 bits- New data indicator - 1 bit- Redundancy version - 2 bits- HARQ process number - 4 bits- TPC command for scheduled PUSCH - [2] bits- UL / SUL indicator (uplink / supplementary UL indicator) - 0 or 1 bit

[0082] DCI format 0_1 ​​can be used as a fallback DCI for scheduling PUSCH, in which case the CRC can be scrambled with C-RNTI. DCI format 0_1 ​​with the CRC scrambled with C-RNTI can include, for example, the information in Table 4 below.

[0083] - Carrier indicator - 0 or 3 bits- UL / SUL indicator - 0 or 1 bit- Identifier for DCI formats - [1] bits- Bandwidth part indicator - 0, 1, or 2 bits- Frequency domain resource assignment- For resource allocation type 0 bits- For resource allocation type 1, bits- Time domain resource assignment -1, 2, 3, or 4 bits- VRB-to-PRB mapping (virtual resource block-to-physical resource block mapping) - 0 or 1 bit, only for resource allocation type 1.○ 0 bit if only resource allocation type 0 is configured;○ 1 bit otherwise.- Frequency hopping flag - 0 or 1 bit, only for resource allocation type 1.○ 0 bit if only resource allocation type 0 is configured;○ 1 bit otherwise.- Modulation and coding scheme - 5 bits- New data indicator - 1 bit- Redundancy version - 2 bits- HARQ process number - 4 bits- 1st downlink assignment index (first downlink allocation index)- 1 or 2 bits○ 1 bit for semi-static HARQ-ACK codebook (semi-static HARQ-ACK In case of codebook);○ 2 bits for dynamic HARQ-ACK codebook with single HARQ-ACK codebook(When dynamic HARQ-ACK codebook is used with single HARQ-ACK codebook).- 2nd downlink assignment index (2nd downlink assignment index) - 0 or 2 bits○ 2 bits for dynamic HARQ-ACK codebook with two HARQ-ACK sub-codebooks(When dynamic HARQ-ACK codebook is used with two HARQ-ACK sub-codebooks);○ 0 bit otherwise.TPC command for scheduled PUSCH - 2 bits- SRS resource indicator (SRS resource indicator) -. or bits○ bits for non-codebook based PUSCH transmission; ○ bits for codebook based PUSCH transmission. - Precoding information and number of layers - up to 6 bits - Antenna ports - up to 5 bits - SRS request - 2 bits - CSI request - 0, 1, 2, 3, 4, 5, or 6 bits - CBG transmission information - 0, 2, 4, 6, or 8 bits - PTRS-DMRS association (Phase tracking reference signal-demodulation reference signal relationship) - 0 or 2 bits - beta_offset indicator - 0 or 2 bits - DMRS sequence initialization - 0 or 1 bit

[0084] DCI format 1_0 can be used as a fallback DCI for scheduling PDSCH, in which case the CRC can be scrambled with C-RNTI. DCI format 1_0 with the CRC scrambled with C-RNTI can include, for example, the information in Table 5 below.

[0085] - Identifier for DCI formats - [1] bit- Frequency domain resource assignment -[ ] bits- Time domain resource assignment - X bits- VRB-to-PRB mapping - 1 bit.- Modulation and coding scheme - 5 bits- New data indicator - 1 bit- Redundancy version - 2 bits- HARQ process number - 4 bits- Downlink assignment index - 2 bits- TPC command for scheduled PUCCH - [2] bits- PUCCH resource indicator (physical uplink control channel, PUCCH) - 3 bits- PDSCH-to-HARQ feedback timing indicator (PDSCH-to-HARQ feedback timing indicator) - [3] bits

[0086] DCI format 1_1 can be used as a fallback DCI for scheduling PDSCH, in which case the CRC can be scrambled with C-RNTI. DCI format 1_1 with the CRC scrambled with C-RNTI can include, for example, the information in Table 6 below.

[0087] - Carrier indicator - 0 or 3 bits- Identifier for DCI formats - [1] bits- Bandwidth part indicator - 0, 1 or 2 bits- Frequency domain resource assignment○ For resource allocation type 0, bits○ For resource allocation type 1, bits- Time domain resource assignment -1, 2, 3, or 4 bits- VRB-to-PRB mapping - 0 or 1 bit, only for resource allocation type 1.○ 0 bit if only resource allocation type 0 is configured;○ 1 bit otherwise.- PRB bundling size indicator - 0 or 1 bit - Rate matching indicator - 0, 1, or 2 bits - ZP CSI-RS trigger - 0, 1, or 2 bits For transport block 1 (for the first transport block): - Modulation and coding scheme - 5 bits - New data indicator - 1 bit - Redundancy version - 2 bits For transport block 2 (for the second transport block): - Modulation and coding scheme - 5 bits - New data indicator - 1 bit - Redundancy version - 2 bits - HARQ process number - 4 bits - Downlink assignment index - 0 or 2 or 4 bits - TPC command for scheduled PUCCH - 2 bits - PUCCH resource indicator - 3 bits - PDSCH-to-HARQ_feedback timing indicator - 3 bits - Antenna ports - 4, 5, or 6 bits- Transmission configuration indication - 0 or 3 bits- SRS request - 2 bits- CBG transmission information - 0, 2, 4, 6, or 8 bits- CBG flushing out information - 0 or 1 bit- DMRS sequence initialization - 1 bit.

[0088] Below, the downlink control channel in a 5G system will be described in more detail with reference to drawings.

[0089] FIG. 4 is a diagram illustrating an example of a control region in which a downlink control channel is transmitted in a 5G system. FIG. 4 is a diagram illustrating an example in which two control regions (control region #1 (401), control region #2 (402)) are set within a terminal bandwidth portion (410) on the frequency axis and within one slot (420) on the time axis. The control regions (401, 402) can be set to specific frequency resources (403) within the entire terminal bandwidth portion (410) on the frequency axis. The time axis can be set to one or more OFDM symbols, which can be defined as the control region length (control resource set duration, 404). Referring to the example illustrated in FIG. 4, control region #1 (401) is set to a control region length of two symbols, and control region #2 (402) is set to a control region length of one symbol.

[0090] In the aforementioned 5G system, the control region can be established by the base station to the terminal via higher-layer signaling (e.g., system information, MIB, RRC signaling). Establishing a control region for the terminal means providing information such as the control region identifier, the frequency location of the control region, and the symbol length of the control region. For example, this information may include the information in Table 7.

[0091] ControlResourceSet ::= SEQUENCE {-- Corresponds to L1 parameter 'CORESET-ID' controlResourceSetId ControlResourceSetId,(Control domain identifier (Identity)) frequencyDomainResources BIT STRING (SIZE (45)),(Frequency axis resource allocation information) duration INTEGER (1..maxCoReSetDuration),(Time axis resource allocation information) cce-REG-MappingType CHOICE {(CCE-to-REG mapping method) interleaved SEQUENCE {reg-BundleSize ENUMERATED {n2, n3, n6},(REG bundle size) precoderGranularity ENUMERATED {sameAsREG-bundle, allContiguousRBs}, interleaverSize ENUMERATED {n2, n3, n6}(interleaver size) shiftIndex INTEGER(0..maxNrofPhysicalResourceBlocks-1) OPTIONAL(Interleaved Shift)},nonInterleaved NULL},tci-StatesPDCCH SEQUENCE(SIZE (1..maxNrofTCI-StatesPDCCH)) OF TCI-StateId OPTIONAL,(QCL setting information)tci-PresentInDCI ENUMERATED {enabled} OPTIONAL, -- Need S}

[0092] In Table 7, the tci-StatesPDCCH (simply named TCI (transmission configuration indication) state) configuration information may include information on one or more SS / PBCH block indices or CSI-RS (channel state information reference signal) indices that are in a QCL (quasi co-located) relationship with the DMRS transmitted in the corresponding control region.

[0093] FIG. 5 is a diagram illustrating an example of a basic unit of time and frequency resources that constitute a downlink control channel that can be used in a 5G system. According to FIG. 5, the basic unit of time and frequency resources that constitute a control channel can be referred to as a REG (resource element group, 503), and a REG (503) can be defined as 1 OFDM symbol (501) on the time axis and 1 PRB (physical resource block, 502) on the frequency axis, i.e., 12 subcarriers. A base station can concatenate REGs (503) to constitute a downlink control channel allocation unit.

[0094] As illustrated in FIG. 5, if the basic unit to which a downlink control channel is allocated in a 5G system is called a CCE (control channel element, 504), 1 CCE (504) may be composed of multiple REGs (503). Taking the REG (503) illustrated in FIG. 5 as an example, the REG (503) may be composed of 12 REs, and if 1 CCE (504) is composed of 6 REGs (503), 1 CCE (504) may be composed of 72 REs. When a downlink control region is established, the region may be composed of multiple CCEs (504), and a specific downlink control channel may be mapped to and transmitted by one or multiple CCEs (504) according to an aggregation level (AL) within the control region. CCEs (504) within the control area are distinguished by numbers, and the numbers of the CCEs (504) can be assigned according to a logical mapping method.

[0095] The basic unit of the downlink control channel illustrated in FIG. 5, that is, the REG (503), may include both the REs to which the DCI is mapped and the areas to which the DMRS (505), which is a reference signal for decoding the REs, is mapped. As shown in FIG. 5, three DMRSs (505) may be transmitted within one REG (503). The number of CCEs required to transmit the PDCCH may be 1, 2, 4, 8, or 16 depending on the aggregation level, and different numbers of CCEs may be used to implement link adaptation of the downlink control channel. For example, when AL = L, one downlink control channel may be transmitted through L CCEs. The terminal must detect a signal without knowing information about the downlink control channel, and a search space representing a set of CCEs is defined for blind decoding. A search space is a set of downlink control channel candidates, consisting of CCEs that a terminal must attempt to decode at a given aggregation level. Since there are multiple aggregation levels, each of which can be a set of 1, 2, 4, 8, or 16 CCEs, a terminal can have multiple search spaces. A search space set can be defined as the set of search spaces at all configured aggregation levels.

[0096] Search spaces can be categorized into common search spaces and UE-specific search spaces. A certain group of UEs, or all UEs, can search the common search space of the PDCCH to receive cell-common control information, such as dynamic scheduling of system information or paging messages. For example, PDSCH scheduling allocation information for transmitting SIBs, including cell operator information, can be received by searching the common search space of the PDCCH. In the case of the common search space, since a certain group of UEs, or all UEs, must receive the PDCCH, it can be defined as a set of pre-arranged CCEs. Scheduling allocation information for UE-specific PDSCH or PUSCH can be received by searching the UE-specific search space of the PDCCH. The UE-specific search space can be defined UE-specifically as a function of the UE's identity and various system parameters.

[0097] In a 5G system, parameters for a search space for PDCCH can be configured from a base station to a terminal via higher-layer signaling (e.g., SIB, MIB, RRC signaling). For example, the base station can configure the number of PDCCH candidates at each aggregation level L, the monitoring period for the search space, the monitoring occasion for each symbol within the slot for the search space, the search space type (common search space or terminal-specific search space), the combination of DCI format and RNTI to be monitored in the corresponding search space, the control region index to be monitored for the search space, etc. to the terminal. For example, the information in Table 8 can be included.

[0098] SearchSpace ::= SEQUENCE {-- Identity of the search space. SearchSpaceId = 0 identifies the SearchSpace configured via PBCH (MIB) or ServingCellConfigCommon.searchSpaceId SearchSpaceId,(search space identifier)controlResourceSetId ControlResourceSetId,(control space identifier)monitoringSlotPeriodicityAndOffset CHOICE {(monitoring slot level period)sl1 NULL,sl2 INTEGER (0..1),sl4 INTEGER (0..3),sl5 INTEGER (0..4),sl8 INTEGER (0..7),sl10 INTEGER (0..9),sl16 INTEGER (0..15),sl20 INTEGER (0..19)} OPTIONAL,duration(monitoring length) INTEGER (2..2559)monitoringSymbolsWithinSlot BIT STRING (SIZE (14)) OPTIONAL,(슬롘 내 나이스 심보)nrofCandidates SEQUENCE {(집성 별보 PDCCH 이리군 수)aggregationLevel1 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8},aggregationLevel2 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8},aggregationLevel4 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8},aggregationLevel8 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8},aggregationLevel16 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8}},searchSpaceType CHOICE {(தமாற்க்குக்க்கு திய்தை)-- Configures this search space as common search space (CSS) and DCI formats to monitor.common SEQUENCE {(공통이이공공)}ue-Specific SEQUENCE {(단말-특정 이이공공)-- Indicates whether the UE monitors in this USS for DCI formats 0-0 and 1-0 or for formats 0-1 and 1-1.formats ENUMERATED {formats0-0-And-1-0, formats0-1-And-1-1},...}.

[0099] Depending on the configuration information, the base station may configure one or more search space sets for the terminal. In some embodiments, the base station may configure search space set 1 and search space set 2 for the terminal, and may configure the terminal to monitor DCI format A scrambled with X-RNTI in search space set 1 in a common search space, and may configure the terminal to monitor DCI format B scrambled with Y-RNTI in search space set 2 in a terminal-specific search space.

[0100] According to the configuration information, one or more search space sets may exist in a common search space or a terminal-specific search space. For example, search space set #1 and search space set #2 may be configured as a common search space, and search space set #3 and search space set #4 may be configured as terminal-specific search spaces.

[0101] In the common search space, the following combinations of DCI formats and RNTIs can be monitored. Of course, the examples below are not limited to these.

[0102] - DCI format 0_0 / 1_0 with CRC scrambled by C-RNTI, CS-RNTI, SP-CSI-RNTI, RA-RNTI, TC-RNTI, P-RNTI, SI-RNTI

[0103] - DCI format 2_0 with CRC scrambled by SFI-RNTI

[0104] - DCI format 2_1 with CRC scrambled by INT-RNTI

[0105] - DCI format 2_2 with CRC scrambled by TPC-PUSCH-RNTI, TPC-PUCCH-RNTI

[0106] - DCI format 2_3 with CRC scrambled by TPC-SRS-RNTI

[0107] In a terminal-specific search space, the following combinations of DCI formats and RNTIs can be monitored. Of course, the examples below are not limited to these examples.

[0108] - DCI format 0_0 / 1_0 with CRC scrambled by C-RNTI, CS-RNTI, TC-RNTI

[0109] - DCI format 1_0 / 1_1 with CRC scrambled by C-RNTI, CS-RNTI, TC-RNTI

[0110] The RNTIs specified may follow the definitions and uses below.

[0111] C-RNTI (cell RNTI): For terminal-specific PDSCH scheduling purposes

[0112] TC-RNTI (temporary cell RNTI): For terminal-specific PDSCH scheduling purposes

[0113] CS-RNTI (configured scheduling RNTI): Used for semi-statically configured terminal-specific PDSCH scheduling.

[0114] RA-RNTI (random access RNTI): Used for PDSCH scheduling in the random access phase.

[0115] P-RNTI (paging RNTI): Used for scheduling PDSCH where paging is transmitted.

[0116] SI-RNTI (system information RNTI): Used for scheduling PDSCH where system information is transmitted.

[0117] INT-RNTI (interruption RNTI): Used to indicate whether pucturing is in progress for PDSCH.

[0118] TPC-PUSCH-RNTI (transmit power control for PUSCH RNTI): Used to indicate power control commands for PUSCH.

[0119] TPC-PUCCH-RNTI (transmit power control for PUCCH RNTI): Used to indicate power control commands for PUCCH.

[0120] TPC-SRS-RNTI (transmit power control for SRS RNTI): Used to indicate power control commands for SRS (sounding reference signal)

[0121] The aforementioned specified DCI formats may follow definitions such as the examples in Table 9.

[0122] DCI formatUsage0_0Scheduling of PUSCH in one cell0_1Scheduling of PUSCH in one cell1_0Scheduling of PDSCH in one cell1_1Scheduling of PDSCH in one cell2_0Notifying a group of UEs of the slot format2_1Notifying a group of UEs of the PRB(s) and OFDM symbol(s) where UE may assume no transmission is intended for the UE2_2Transmission of TPC commands for PUCCH and PUSCH2_3Transmission of a group of TPC commands for SRS transmissions by one or more UEs

[0123] In a 5G system, the search space of aggregation level L in CORESET p and search space set s can be expressed as in the following mathematical expression 1.

[0124] [Mathematical Formula 1]

[0125]

[0126] - L: Integration level

[0127] - nCI : Carrier Index

[0128] - n CCE,p : Total number of CCEs present in CORESET p

[0129] - : slot index

[0130] - : Number of PDCCH candidates for aggregation level L

[0131] - = 0, ..., -1: PDCCH candidate index of aggregation level L

[0132] - l = 0, ..., L -1

[0133] - , Y p,-1 = nRNTI≠0, A p = 39827 for p mod 3 = 0, A p = 39829 for p mod 3 = 1, A p = 39839 for p mod 3 = 2, D= 65537

[0134] - n RNTI : Terminal identifier

[0135] The value can be 0 for a common search space.

[0136] In the case of a terminal-specific search space, the value may correspond to a value that changes depending on the terminal's identity (C-RNTI or ID set to the terminal by the base station) and the time index.

[0137] In a 5G system, since multiple search space sets can be set with different parameters (e.g., parameters in Table 9), the set of search space sets monitored by a terminal at each point in time can be different. For example, if search space set #1 is set with an X-slot period and search space set #2 is set with a Y-slot period and X and Y are different, the terminal can monitor both search space set #1 and search space set #2 in a specific slot, or can monitor either search space set #1 or search space set #2 in a specific slot.

[0138] Figure 6 is a diagram illustrating an example of frequency-axis resource allocation of PDSCH in a 5G system.

[0139] FIG. 6 is a diagram illustrating three frequency axis resource allocation methods, type 0 (600), type 1 (605), and dynamic switch (610), which can be set through an upper layer in an NR wireless communication system.

[0140] Referring to Fig. 6, if the terminal is set to use only resource type 0 through upper layer signaling (600), some DCIs that allocate PDSCH to the terminal are N RBG It contains a bitmap consisting of N bits. The conditions for this will be explained later. In this case, N RBG refers to the number of RBGs (resource block groups) determined as shown in Table 10 below according to the BWP size allocated by the BWP indicator and the upper layer parameter rbg-Size, and data is transmitted to the RBG indicated as 1 by the bitmap.

[0141] Bandwidth Part SizeConfiguration 1Configuration 21-362437-724873-144816145-2751616

[0142] If the terminal is configured to use only resource type 1 through upper layer signaling (605), some DCIs that allocate PDSCH to the terminal It includes frequency axis resource allocation information consisting of bits. The conditions for this will be explained later. Through this, the base station can set the starting VRB (620) and the length (625) of frequency axis resources allocated continuously therefrom.

[0143] If a terminal is configured to use both resource type 0 and resource type 1 through upper layer signaling (610), some DCIs that allocate PDSCH to the terminal include frequency-axis resource allocation information composed of bits of a larger value (635) among the payload (615) for configuring resource type 0 and the payload (620, 625) for configuring resource type 1. Conditions for this will be explained later. At this time, one bit may be added to the first part (MSB) of the frequency-axis resource allocation information in the DCI, and if the bit has a value of '0', it may indicate that resource type 0 is used, and if the bit has a value of '1', it may indicate that resource type 1 is used.

[0144] Below, a time domain resource allocation method for data channels in a 5G system is described.

[0145] A base station can set up a table for time-domain resource allocation information for a downlink data channel (PDSCH) and an uplink data channel (PUSCH) to a terminal via higher-layer signaling (e.g., RRC signaling). A table with up to maxNrofDL-Allocations=16 entries can be set up for the PDSCH, and a table with up to maxNrofUL-Allocations=16 entries can be set up for the PUSCH. In one embodiment, the time domain resource allocation information may include PDCCH-to-PDSCH slot timing (corresponding to the time interval in slot units between the time point at which a PDCCH is received and the time point at which a PDSCH scheduled by the received PDCCH is transmitted, denoted as K0), PDCCH-to-PUSCH slot timing (corresponding to the time interval in slot units between the time point at which a PDCCH is received and the time point at which a PUSCH scheduled by the received PDCCH is transmitted, denoted as K2), information about the position and length of the start symbol for which a PDSCH or PUSCH is scheduled within a slot, the mapping type of the PDSCH or PUSCH, etc. For example, information such as Table 11 or Table 12 below may be transmitted from the base station to the terminal.

[0146] PDSCH-TimeDomainResourceAllocationList information elementPDSCH-TimeDomainResourceAllocationList ::= SEQUENCE (SIZE(1..maxNrofDL-Allocations)) OF PDSCH-TimeDomainResourceAllocationPDSCH-TimeDomainResourceAllocation ::= SEQUENCE {k0 INTEGER(0..32) OPTIONAL, -- Need S(PDCCH-to-PDSCH timing, in slot units)mappingType ENUMERATED {typeA, typeB},(PDSCH mapping type)startSymbolAndLength INTEGER (0..127)(PDSCH start symbol and length)}

[0147] PUSCH-TimeDomainResourceAllocation information elementPUSCH-TimeDomainResourceAllocationList ::= SEQUENCE (SIZE(1..maxNrofUL-Allocations)) OF PUSCH-TimeDomainResourceAllocationPUSCH-TimeDomainResourceAllocation ::= SEQUENCE {k2 INTEGER(0..32) OPTIONAL, -- Need S(PDCCH-to-PUSCH timing, in slot units)mappingType ENUMERATED {typeA, typeB},(PUSCH mapping type)startSymbolAndLength INTEGER (0..127)(PUSCH start symbol and length)}

[0148] The base station may notify the terminal of one of the entries in the table for the time domain resource allocation information described above via L1 signaling (e.g., DCI) (e.g., indicated by the 'Time Domain Resource Allocation' field in the DCI). The terminal may obtain the time domain resource allocation information for the PDSCH or PUSCH based on the DCI received from the base station.

[0149] FIG. 7 is a diagram illustrating an example of time axis resource allocation of PDSCH in a 5G system.

[0150] Referring to Figure 7, the base station uses the upper layer to set the subcarrier spacing (SCS, μ) of the data channel and the control channel. PDSCH , μ PDCCH ), scheduling offset (K0) value, and the time axis position of the PDSCH resource can be indicated according to the OFDM symbol start position (700) and length (705) within a slot dynamically indicated through DCI.

[0151] FIG. 8 is a diagram illustrating an example of time-domain resource allocation according to the subcarrier spacing of a data channel and a control channel in a 5G system.

[0152] Referring to Fig. 8, when the subcarrier spacing of the data channel and the control channel is the same (800, μ PDSCH = μ PDCCH ), since the slot numbers for data and control are the same, the base station and the terminal can generate a scheduling offset according to the predetermined slot offset K0. On the other hand, if the subcarrier spacing of the data channel and the control channel are different (805, μ PDSCH ≠ PDCCH), since the slot numbers for data and control are different, the base station and the terminal can generate a scheduling offset according to a predetermined slot offset K0 based on the subcarrier spacing of the PDCCH.

[0153] Meanwhile, 3GPP is conducting research on NR-based integrated sensing and communication (ISAC) systems. ISAC systems are wireless sensing technologies based on radio frequency (RF) signals used by mobile communication entities (base stations or terminals). Specifically, a transmitter transmits an RF signal, and a receiver with sensing capabilities receives the signal after it passes through physical objects along the signal path (reflected, scattered, and transmitted). This signal is then processed by a digital signal processing algorithm (evaluating information parameters such as signal intensity, delay, Doppler, or angular spectrum) to enable object recognition. This enables the extraction of object features such as position, velocity, and geometric information, and the acquisition of context-sensitive information for various applications. This enables the provision of new functions and services, such as object detection, object recognition (humans, vehicles, animals, or aircraft), high-precision positioning, tracking, and activity recognition. This ISAC designation can also be referred to as joint communication and sensing (JCAS) and JRC2LS (joint radar, communication, computation, localization, sensing).

[0154] As mentioned above, the entity of wireless sensing in the ISAC system may be the same as the entity of mobile communication. That is, the entity of wireless sensing may be a base station or a terminal. In the ISAC system, a sensing transmitter refers to a base station or a terminal that transmits a sensing signal in sensing service operation. A sensing receiver refers to a base station or a terminal that receives a sensing signal in sensing service operation. A sensing target refers to an object or target that is to be detected by deriving the object's characteristics from the sensing signal. Monostatic sensing refers to a situation where the sensing transmitter and the sensing receiver coexist in a base station or a terminal. Bistatic sensing refers to a situation where the sensing transmitter and the sensing receiver are located in different base stations or terminals. A sensing signal refers to an RF signal of a 3GPP wireless interface that can be used for sensing purposes.

[0155] FIG. 9 is a diagram illustrating an example of a sensing method and mode according to a sensing transmitter and receiver of an ISAC system according to one embodiment of the present disclosure.

[0156] In Fig. 9 (a), a base station monostatic sensing method and mode in which a sensing transmitter and a receiver coexist in a base station (1101) are illustrated. A sensing signal (1102) is transmitted from a sensing transmitter located in a base station (1101). The signal reaches a sensing target (1104) and undergoes phenomena such as reflection, scattering, and transmission. A receiver located in the same base station as the sensing transmitter can receive this signal (1103) and detect the sensing target through a sensing-specific algorithm.

[0157] (b), a terminal monostatic sensing method and mode in which a sensing transmitter and a receiver coexist in a terminal (1105) are illustrated. A sensing signal (1106) is transmitted from a sensing transmitter located in the terminal (1105). The signal reaches a sensing target (1108) and undergoes phenomena such as reflection, scattering, and transmission. A receiver located in the same base station as the sensing transmitter can receive this signal (1107) and detect the sensing target through a sensing-specific algorithm.

[0158] (c), a base station bistatic sensing method and mode are illustrated, in which a sensing transmitter and a receiver are located at different base stations. A sensing signal (1112) is transmitted from a base station (1110) where a sensing transmitter is located. The signal reaches a sensing target (1114) and undergoes phenomena such as reflection, scattering, and transmission. A receiver located at a different base station (1111) from the base station where the sensing transmitter is located can receive this signal (1113), and can detect the sensing target using a sensing-specific algorithm.

[0159] (d) illustrates a terminal bistatic sensing method and mode in which a sensing transmitter and a receiver are located at different terminals. A sensing signal (1117) is transmitted from a terminal (1115) in which a sensing transmitter is located. The signal reaches a sensing target (1119) and undergoes phenomena such as reflection, scattering, and transmission. A receiver located at a terminal (1116) different from the terminal in which the sensing transmitter is located can receive this signal (1118) and detect the sensing target using a sensing-specific algorithm.

[0160] In (e), a base station-terminal bistatic sensing method and mode are illustrated, in which a sensing transmitter and a receiver are located at different base stations and terminals. A sensing signal (1122) is transmitted from a base station (1120) where a sensing transmitter is located. The signal reaches a sensing target (1124) and undergoes phenomena such as reflection, scattering, and transmission. Unlike the base station where the sensing transmitter is located, a receiver located at a terminal (1121) can receive this signal (1123) and detect a sensing target using a sensing-specific algorithm.

[0161] In (f), a terminal-base station bistatic sensing method and mode are illustrated, in which a sensing transmitter and a receiver are located at different terminals and base stations. A sensing signal (1127) is transmitted from a terminal (1125) where a sensing transmitter is located. The signal reaches a sensing target (1129) and undergoes phenomena such as reflection, scattering, and transmission. Unlike the terminal where the sensing transmitter is located, a receiver located at a base station (1126) can receive this signal (1128) and detect the sensing target using a sensing-specific algorithm.

[0162] As described above, the ISAC system can be classified into a base station monostatic system, a base station-base station bistatic system, a base station-terminal bistatic system, a terminal-base station bistatic system, a terminal-terminal bistatic system, or a terminal monostatic system, depending on the sensing participating entity (base station or terminal) and the transmitting and receiving entities. The following embodiment describes in detail a method for configuring a base station-based ISAC system.

[0163] As base stations become the main body of sensing, the resource configuration methods operated by the base stations may change. For example, base stations operating unpaired spectrum (or time division duplex, TDD) or paired spectrum (or frequency division duplex, FDD) may allocate a portion of the resources of the existing communication system to the sensing system and use them for sensing operations. The base station may inform the terminals connected to the base station of the resource operation method of the corresponding cell, and the terminals may configure or / and receive instructions for communication system scheduling or sensing system scheduling based on the resource operation method of the connected base station. Accordingly, the base station may require a new resource allocation method to ensure harmonious operation of the communication system and the sensing system.

[0164] In addition, a base station operating a sensing system may need to be designed to take into account coexistence between other base stations or transceivers within the base station. For example, a base station may allocate some of the downlink resources of a communication system in a TDD-based base station to a sensing system, and may perform a monostatic sensing operation that performs sensing transmission and sensing reception simultaneously. While the sensing receiver of a TDD-based base station performing the monostatic sensing expects to receive a sensing signal, other base stations that do not operate sensing at the same time may perform downlink transmission of the communication system. In the above example, from the perspective of a base station operating a sensing system, the downlink signals / channels of other base station communication systems may act as co-channel interference, which may cause a problem of degraded sensing performance.

[0165] As another example, a part of the uplink resources of a communication system in a TDD-based base station may be allocated to a sensing system, and a monostatic sensing operation in which sensing transmission and sensing reception are performed simultaneously or a base station bistatic operation in which sensing transmission and sensing reception are performed by different base stations may be performed. A sensing transmitter of a TDD-based base station performing the monostatic sensing or a base station in charge of sensing transmission in bistatic sensing may transmit sensing signals in the sensing resources, while other base stations that do not operate sensing may perform communication system uplink reception. In the above example, the sensing signals may act as co-channel interference on the side of a communication system base station that does not operate the sensing system, which may cause a problem of degrading the uplink reception performance of the communication system.

[0166] Accordingly, for smooth operation of the sensing system and communication system, coordination through exchange of sensing-related information between base stations may be required.

[0167] In the embodiments below, the configuration of the ISAC system in the base station and terminal, the sensing resource operation method, the sensing time / frequency resource setting method, the sensing resource activation / deactivation method, the base station-based sensing operation method, and the trigger and resource sharing method for base station-based sensing are described in detail.

[0168] <Example 1: ISAC system configuration within base station and terminal>

[0169] An ISAC system can be implemented in a single entity (base station or terminal) by a sensing system having a sensing transmitter, a sensing receiver, and a sensing processing unit (control unit or processor) and a communication system having a communication transmitter, a communication receiver, and a communication processing unit (control unit or processor). The configuration of an ISAC system can vary depending on the sensing and communication methods implemented and operated.

[0170] FIG. 10 is a diagram illustrating an example of a method for configuring an ISAC system according to one embodiment of the present disclosure.

[0171] According to (a) of Fig. 10, the sensing system and the communication system of the ISAC system can be configured separately. The sensing system can be composed of a sensing transmitter (1001), a sensing receiver (1002), and a sensing processor (1003). For example, the sensing transmitter (1001) and the receiver (1002) can transmit / receive sensing signals. Here, the sensing signal refers to a signal for the sole purpose of sensing. To this end, the sensing transmitter and receiver can be composed of an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that low-noise amplifies and down-converts the frequency of a received signal. The sensing transmitter (1001) can transmit the sensing signal transmitted from the sensing processor (1003) to an object to be sensed via a wireless channel, and the sensing receiver (1002) can receive a signal that is reflected, scattered, or refracted from the object and returns. The sensing signal received by the sensing receiver (1002) in this way can be transmitted to the sensing processing unit (1003).

[0172] In addition, the communication system may be composed of a communication transmitter (1004), a communication receiver (1005), and a communication processor (1006). It may include a transmitter / receiver, which refers to the communication receiver (1005) and the base station transmitter (1004), a memory (not shown), and a base station processor (1006, or a base station control unit or processor). According to the communication method of the base station described above, the transmitter / receiver units (1004, 1005), the memory, and the base station processor (1006) of the base station may operate. According to the ISAC system configuration described above, the sensing system and the communication system may have different RF transmitter / receivers. That is, they may be divided into an RF transmitter / receiver dedicated to the sensing system and an RF transmitter / receiver dedicated to the communication system, and may be connected to respective processing units. Through this system configuration, signal transmission / reception and processing for sensing and communication may be independently operated, thereby ensuring flexibility in system operation.

[0173] According to (b), the ISAC system may have a configuration that shares some elements of the sensing system and the communication system. The transmitter of the sensing system and the transmitter (1011) of the communication system may be implemented using the same device. The transmitter refers to an RF transmitter that increases and amplifies the frequency of a signal, and performs an operation of transmitting a signal through a wireless channel, so they may share the same device. In addition, the receiver of the sensing system and the receiver (1013) of the communication system may be implemented using the same device. Depending on the signal transmitted from the processing unit of each system, the transmitter (1011) may transmit each signal through the wireless channel. For example, if a signal from the communication processing unit (1013) is transmitted to the sensing and communication transmitting unit (1011), the sensing and communication transmitting unit (1011) may transmit the corresponding signal, and if a signal is transmitted from the sensing processing unit (1012), the corresponding signal may be transmitted. The receiving unit refers to an RF receiver that low-noise amplifies and frequency-downconverts the received signal, and performs an operation of receiving a signal transmitted through a wireless channel, so that the same receiving unit can be shared between the sensing system and the communication system. For example, if a signal is received by the sensing and communication receiving unit (1013), the received signal can be transmitted to the sensing processing unit (1012) and / or the communication processing unit (1013). At this time, the sensing and communication receiving unit (1013) may include a device capable of distinguishing between a sensing signal and a communication signal, so that the classified signal can be transmitted to each processing unit accordingly. Alternatively, the sensing and communication receiving unit (1013) may not include a separate signal distinguishing device. In this case, the signal is transmitted to the sensing processing unit (1012) and the communication processing unit (1013), and the signal distinction can be performed according to a separate classification process in each processing unit. This system configuration can ensure ease of implementation because it uses the same RF transceiver.

[0174] According to (c), the ISAC system can share some elements of the sensing system and the communication system, and the processing unit (1022) for processing the sensing and communication signals can also be shared. That is, the sensing and communication processing unit can be implemented in the form of a single chip. The transmitting unit means an RF transmitter that increases and amplifies the frequency of a signal, and performs an operation of transmitting a signal through a wireless channel, so they can share the same device (1021). In addition, the receiving unit of the sensing system and the receiving unit (1023) of the communication system can be implemented in the same device. Depending on the signal transmitted from the processing unit of each system, the transmitting unit (1021) can transmit each signal through the wireless channel. For example, if a signal from the sensing and communication processing unit (1022) is transmitted to the sensing and communication transmitting unit (1021), the sensing and communication transmitting unit (1021) can transmit the corresponding signal. The receiving unit is an RF receiver that low-noise amplifies and frequency-downconverts a received signal, and performs an operation of receiving a signal transmitted through a wireless channel, so that the same receiving unit can be shared between the sensing system and the communication system. For example, if a signal is received by the sensing and communication receiving unit (1023), the received signal can be transmitted to the sensing and communication processing unit (1022). At this time, the sensing and communication receiving unit (1023) may include a device capable of distinguishing a sensing signal and a communication signal, so that a pre-classified signal can be transmitted to the processing unit. Alternatively, the sensing and communication receiving unit (1023) may not include a separate signal distinguishing device. In this case, the signal is transmitted to the sensing and communication processing unit (1022), and the signal distinction can be performed according to a separate classification process within the processing unit.

[0175] However, the ISAC system is not limited to the examples in FIG. 10.

[0176] In an ISAC system, a sensing system and a communication system can coexist in a single entity (base station or terminal). However, this does not mean that a single ISAC entity has a sensing transmitter and a sensing receiver for the sensing system. Depending on the implementation, at least one sensing transmitter and one sensing receiver may be implemented. For example, there may be a base station or terminal that implements an ISAC system having only a sensing reception function. Such a base station or terminal does not transmit a separate sensing signal and can only receive the sensing signal. As another example, there may be a base station or terminal that implements an ISAC system having only a sensing transmission function. Such a base station or terminal does not receive a separate sensing signal and can only transmit the sensing signal.

[0177] At least one of the sensing transmitter, the sensing receiver, and the sensing processing unit of the ISAC system can be implemented at a transmission point (i.e., a transmission and reception point (TRP) operated by a base station). In one approach, the sensing transmitter and the sensing receiver can be implemented in the TRP, and the sensing processing unit can be implemented as a component of the base station operating the TRP. For example, the sensing processing unit in the base station can transmit a sensing signal to a TRP connected to the base station, and the sensing transmitter in the TRP can transmit the sensing signal. The sensing receiving unit in the TRP can receive a sensing signal received over a wireless channel and transmit the signal to the sensing processing unit in the base station. In another approach, the entire sensing transmitter, the sensing receiving unit, and the sensing processing unit can be implemented in the TRP.

[0178] <Example 2: Method for Operating Sensing Resources in an ISAC System>

[0179] A base station supporting the ISAC system can perform cell-specific and / or terminal-specific scheduling based on the frame structure of the existing communication system to operate the sensing system.

[0180] In a first method, in addition to the frame structure type of the existing unpaired spectrum (or time division duplex, TDD) or paired spectrum (or frequency division duplex, FDD), another frame structure type (e.g., frame structure type 2) may be introduced to define the operation of the sensing system. The frame structure type 2 may be defined to be supported at the specific frequency or frequency band, or the base station may indicate to the terminal whether the sensing system is supported as system information. The terminal supporting the sensing system may receive the system information including whether the sensing system is supported, and determine whether the sensing system is supported at the specific cell (or frequency, frequency band).

[0181] In a second way, it can be indicated whether the sensing system operation is additionally supported at a specific frequency or frequency band of an existing unpaired spectrum (or TDD) without defining a new frame structure type. In the second way, it can be defined whether the sensing system resource configuration is additionally supported at a specific frequency or frequency band of an existing unpaired spectrum, or the base station can indicate to the terminal whether the sensing system is supported through system information. The terminal supporting the sensing system can receive the system information including whether the sensing system is supported and determine whether the sensing system is supported in the specific cell (or frequency, frequency band).

[0182] In the first and second methods described above, information on whether the sensing system is supported may be information that indirectly indicates whether the sensing system is supported by additionally setting a part of the downlink resource, a part of the flexible resource, or a part of the uplink resource as a sensing system resource in addition to the setting of the TDD UL-DL resource configuration information indicating the downlink slot (or symbol) resource and the uplink slot (or symbol) resource of TDD, or may be information that directly indicates whether the sensing system is supported.

[0183] FIG. 11 is a diagram illustrating an example of how sensing system resources are operated in a TDD band of an ISAC system according to one embodiment of the present disclosure.

[0184] In Fig. 11 (a), a case where TDD is operated in a specific frequency band is illustrated. In a cell where TDD is operated, a base station can transmit and receive signals including data and / or control information to and from a TDD terminal in a downlink slot (or symbol), an uplink slot (or symbol), and a flexible slot (or symbol) based on settings for TDD UL-DL resource configuration information indicating TDD downlink slot (or symbol) resources and uplink slot (or symbol) resources.

[0185] In Fig. 11, it can be assumed that the DDDSU slot format is set according to the TDD UL-DL resource configuration information. Here, 'D' is a slot (1101) composed entirely of downlink symbols, 'U' is a slot composed entirely of uplink symbols (1103), and 'S' is a slot that is not 'D' or 'U', that is, a slot (1102) that includes a downlink symbol or an uplink symbol or includes a flexible symbol. Here, for convenience, it can be assumed that S is composed of 12 downlink symbols and 2 flexible symbols. In addition, the DDDSU slot format can be repeated according to the TDD UL-DL resource configuration information. That is, the repetition period of the TDD configuration is 5 slots (5 ms for 15 kHz SCS, 2.5 ms for 30 kHz SCS, etc.).

[0186] Next, (b) to (c) illustrate an example of a sensing system operating on TDD in a specific frequency band.

[0187] The base station can set some of the downlink resources, uplink resources, or flexible resources in the TDD UL-DL resource configuration information as resources for operating the sensing system as cell-specific information. In (b), an example in which some of the downlink resources in the TDD UL-DL resource configuration information are allocated as resources for operating the sensing system is illustrated. According to (b), the TDD UL-DL resource configuration is repeated according to the TDD cycle (1116). The sensing operation resources (slot unit or symbol unit, 1114) can be set together with the cycle (1115) setting as cell-specific information. Through this setting, the base station can operate the sensing system for each repeating cycle (1115). The sensing operation resources as described above can be set as system information or upper layer signaling.

[0188] The base station can perform separate resource configuration for sensing service-specific operation on the TDD UL-DL resource configuration and cell-specific sensing system resources. In (c), an example of a resource allocation method for sensing service-specific operation on the TDD UL-DL resource configuration information and cell-specific sensing system resources is illustrated. According to (c), the TDD UL-DL resource configuration is repeated according to the TDD period (1128). The sensing operation resource (slot unit or symbol unit, 1124) is cell-specific information and can be set together with the period (1126) setting. Through this setting, the base station can operate the sensing system for each repeating period (1126). In addition, in order to perform a specific sensing service, the base station can separately set a sensing service-specific resource (1125) having a periodicity (1127) on the cell-specific sensing system operation resource (1124). At this time, the period (1127) of the sensing service specific resource (1125) may be greater than or equal to the period (1126) of the cell specific sensing system resource (1124). The sensing operation resource refers to a resource operated by the base station for the sensing system as a cell specific configuration resource. The sensing service specific resource refers to a configuration resource that can be set according to a sensing service (for example, object detection, object recognition (human, vehicle or and high-precision positioning, tracking and activity recognition)) on the sensing operation resource. The sensing operation resource can be set as system information or upper layer signaling, and the sensing service specific resource can be set together with the sensing operation resource or set separately. The sensing service specific resource can be terminal or group specific information, and can be set using terminal specific upper layer signaling or L1 signaling.

[0189] <Third Embodiment: Method for Setting Sensing Time / Frequency Resources in an ISAC System>

[0190] FIG. 12 is a diagram illustrating an example of a method for setting sensing time / frequency resources for operating a sensing system according to one embodiment of the present disclosure.

[0191] According to FIG. 12, the base station can set some of the downlink resources, uplink resources, or flexible resources in the TDD UL-DL resource configuration information operated in the communication system as sensing system resources (or sensing resources) as cell-specific information, and the sensing resources can be set to include at least one of a time domain start slot (or symbol) or the length of a time domain slot (or symbol). At this time, the frequency resource can follow one of an active bandwidth portion size, an initial bandwidth portion size, and an entire component carrier (CC) size. Specifically, the TDD UL-DL resource configuration is repeated according to a TDD period (1206). The sensing operation resource (slot unit or symbol unit, 1204) can be set together with the period (1205) setting as cell-specific information. At this time, the sensing resource can include at least one of a start slot (or / and symbol, 1208) in the time domain or the length (or number) of slots (or / and symbols) in the time domain (1207).

[0192] In another way, the base station can set some of the downlink resources, uplink resources, or flexible resources in the TDD UL-DL resource configuration information operated in the communication system as sensing system resources as cell-specific information, and the sensing resource information can set the sensing resources by including at least one of the time domain start slot (or / and symbol), the length (or number) of the time domain slot (or / and symbol), the start point of the frequency domain, or / and the length (or band) of the frequency domain. That is, the base station can divide the frequency resources within the same time resource and use some of them as the communication system and some of them as the sensing system for more flexible resource utilization. Specifically, the TDD UL-DL resource configuration is repeated according to the TDD period (1206). The sensing operation resources (slot units or symbol units, 1204) can be set together with the period (1205) setting as cell-specific information. At this time, the sensing resource may include at least one of a start slot (or / and symbol, 1208) in the time domain and / or a length (or number) of slots (or / and symbols) (1207) in the time domain. In addition, the sensing resource may include information on a start point (1210) in the frequency domain, and the information on the start point in the frequency domain may be one of a CRB, point A of a component carrier, a start PRB of an active or initial bandwidth portion, or a PRB position separately designated for a sensing operation, or a point indicated by adding an offset based on one of the above positions. In addition, the sensing resource may be a length (or bandwidth, 1209) in the frequency domain, which may be expressed in units of the length of a PRB.

[0193] <Example 4: Method for activating / deactivating sensing resources within an ISAC system>

[0194] FIG. 13 is a diagram illustrating an example of a method for activating / deactivating a sensing resource according to one embodiment of the present disclosure.

[0195] According to FIG. 13, the base station can set some of the downlink resources, uplink resources, or flexible resources in the TDD UL-DL resource configuration information operated in the communication system as sensing system resources using cell-specific information, and can activate / deactivate the corresponding resources when necessary. Specifically, the TDD UL-DL resource configuration of the base station is repeated according to the TDD cycle (1306). The sensing operation resource (time domain slot or symbol or frequency domain size, 1304) can be set together with the cycle (1305) setting as cell-specific information. Through the setting, the base station can operate the sensing system for each repeated cycle (1305).

[0196] However, the base station may set and / or instruct (hereinafter, set / instruct) the deactivation (1307) of the sensing resource in consideration of the situation where the traffic of the communication system is to be processed quickly or sensing is not required. The deactivation setting / instruction may be transmitted from the base station to the terminal through upper layer signaling. The terminal that receives the deactivation setting / instruction may expect downlink reception scheduling for the communication system in the sensing resource. The deactivation of the sensing resource, once set, may continue for the sensing resource cycle as long as there is no separate setting / instruction from the base station. At this time, the deactivation may be reset through upper layer signaling. Alternatively, the deactivation of the sensing resource may be one-time, such that the sensing resource may be deactivated only at the set / instructed time point and the sensing resource may be activated again after the set / instructed time point. For example, the above operation may be deactivated according to a DCI instruction from the base station.

[0197] In another way, the base station can set some of the downlink resources, uplink resources, or flexible resources in the TDD UL-DL resource configuration information operated in the communication system as sensing system resources as cell-specific information, and can activate / deactivate some of the resources when necessary. Specifically, the TDD UL-DL resource configuration of the base station is repeated according to the TDD cycle (1316). The sensing operation resource (time domain slot or symbol or frequency domain size, 1314) can be set together with the cycle (1315) setting as cell-specific information. Through the setting, the base station can operate the sensing system for each repeating cycle (1315). However, the base station can set / instruct the deactivation (1317) of the sensing resource in consideration of the situation in which the traffic of the communication system is to be processed quickly or sensing is not necessary.

[0198] At this time, the sensing resource to be deactivated may be a part of the entire sensing resource, and the deactivation setting / instruction of the sensing resource may include information on the starting point (slot or / and symbol, 1318) of the resource to be deactivated in the time domain or the length (or number, 1319) of the slot or / and symbol in the time domain. In addition, the deactivation setting / instruction of the sensing resource may additionally include starting point information in the frequency domain or / and bandwidth information or BWP information in the frequency domain. The information on the frequency domain may be similar to the information for setting the sensing resource in FIG. 12. Alternatively, the resource to be deactivated may be indicated by bitmap information on the time domain or / and the frequency domain, and in this case, one bit may correspond to a specific unit of resource on the time domain or the frequency domain.

[0199] Deactivation of sensing resources may be performed in resources where the above-described resources overlap with sensing resources. The deactivation setting / instruction may be transmitted from the base station to the terminal. A terminal that has received the deactivation region setting / instruction may expect downlink reception scheduling for a communication system in the sensing resources. Deactivation of the sensing resources, once set, may continue for the duration of the sensing resource cycle unless a separate setting / instruction is given by the base station. The deactivation may be reset via upper layer signaling. Alternatively, the deactivation of the sensing resources may be one-time, such that the sensing resources are deactivated only at the set / instructed time point and then reactivated after that time point. The deactivation may be performed according to a DCI instruction from the base station.

[0200] <Example 5: Base station-based sensing operation method within an ISAC system>

[0201] FIG. 14 is a diagram illustrating an example of a base station-to-base station bistatic sensing operation within an ISAC system according to one embodiment of the present disclosure.

[0202] According to FIG. 14, a bistatic operation may be defined in which a base station (1401) that transmits a sensing signal (1412) from base stations (1401, 1402) operating an ISAC system and a base station (1402) that receives a signal (1413) resulting from reflection, scattering, or refraction of the sensing signal (1412) when the signal reaches an object (or sensing target, 1405). The base station (1401) operating the ISAC system may operate a TDD UL-DL resource configuration (1408) and set a cell-specific sensing resource (1410) for operating the sensing system. The TDD UL-DL resource configuration (1408) or the cell-specific sensing resource (1410) may be included in system information 0 (SIB0) and set for a terminal (1406) that connects to the base station (1401). A base station (1402) operating another ISAC system can operate a TDD UL-DL resource configuration (1409) and set cell-specific sensing resources (1411) for sensing system operation. The TDD UL-DL resource configuration (1409) or cell-specific sensing resources (1411) can be included in system information 0 (SIB0) and set for a terminal (1407) connecting to the base station (1402).

[0203] A base station operating an ISAC system can be connected to a core network, and the core network can set / instruct each base station to perform a sensing role. For example, a base station (1401) operating an ISAC can be set / instructed as a base station receiving a sensing signal, and for this purpose, the sensing signal can be transmitted (1412) (for example, a downlink transmission operation in a communication system) from a sensing resource (1410). On the other hand, another base station (1402) operating an ISAC can receive (1413) (for example, an uplink reception operation in a communication system) a signal returning from the base station (1401) transmitting the sensing signal after passing through an object (1405).

[0204] As one method of sensing operation of a base station operating an ISAC system, if sensing resources (1410, 1411) are set in the TDD UL-DL resource configuration (1408, 1409) set by the base station, the base station does not perform signal / channel transmission or reception for a communication system in the sensing resources (1410, 1411), and the terminal does not perform signal / channel transmission or reception for the communication system. In the ISAC system, in the sensing resources (1410, 1411) set by the base station, the base station can only perform signal / channel transmission or reception for a sensing system, and the terminal can only perform signal / channel transmission or reception for the sensing system.

[0205] As another method of sensing operation of a base station operating an ISAC system, if sensing resources (1410, 1411) are set in the TDD UL-DL resource configuration (1408, 1409) set by the base station, the base station can perform signal / channel transmission or reception for the communication system in the sensing resources (1410, 1411), and the terminal can perform signal / channel transmission or reception for the communication system. In other words, this means that a signal used in the communication system can be applied as a signal in the sensing system in the same way, and in the communication system, it means that the signal is used as a signal containing information of a data / control channel, but the signal can also be used for the purpose of energy detection in the sensing system.

[0206] FIG. 15 is a diagram illustrating an example of a base station-to-base station bistatic sensing operation within an ISAC system according to one embodiment of the present disclosure.

[0207] According to FIG. 15, a base station (1501) operating an ISAC system and another base station (1502) can perform a bistatic sensing operation based on the TDD DL-UL resource configuration (1511, 1512) and beam resource settings operated by each base station. The base station (1501) operating the ISAC system can set a cell-specific TDD DL-UL resource configuration (1511) and sensing resources (1504), and can set beam information (1506, 1507, 1508) for each resource within the sensing resources. The beam information is expressed in units of three separate symbols for example, but the number of resources, symbols, or slot units may vary depending on the base station settings. The base station (1501) can be set / instructed by the core network as a base station in charge of transmitting sensing signals, and according to the above setting / instruction, each resource (1506, 1507, 1508) can be used as a sensing signal transmission resource.

[0208] On the other hand, the base station (1502) operating the ISAC system can set cell-specific TDD DL-UL resource configuration (1512) and sensing resources (1505), and can set beam information (1509) for each resource within the sensing resources. The beam information is expressed as the same beam information being repeated in units of three symbols for the sake of example, but the number of resources, symbol, or slot units may vary depending on the base station settings. The base station (1502) can be set / instructed as a base station in charge of receiving sensing signals by the core network, and each resource (1502) can be used as a sensing signal reception resource according to the setting / instruction. It can be assumed that the intended TDD DL-UL resource configuration, sensing resources, and beam information between the base stations (1501, 1502) within the ISAC system are known to each other.

[0209] The base station (1501) can sequentially transmit signals corresponding to each resource (1506, 1507, or 1508) in the sensing resource (1504) according to the setting / instruction from the core network, and the base station (1502) can sequentially receive sensing signals from each resource (1509) in the sensing resource (1505) according to the setting / instruction from the core network. The sensing signal transmitted from the base station (1501) can pass through (reflect, scatter, or refract) an object to be sensed (or sensing target, 1503) and reach the base station (1502), and the base station (1502) can collect reception data for each sensing resource (1509). The above-mentioned collected sensing data can form a result matrix (1510) based on the transmission beam resources (1506, 1507, 1508) of the base station (1501) and the reception beam resources (1509) of the base station (1502), and a sensing result according to the sensing use purpose can be derived based on the matrix (1510) of the received sensing data.

[0210] Each sensing resource operated by the above base station can be configured as a sensing resource set, and the sensing resources can be configured according to periodic, semi-periodic, or dynamic time domain operations. In addition, the sensing resource set can also be configured according to periodic, semi-periodic, or dynamic time domain operations. At this time, the time domain operation of the sensing resource set and the time domain operation of each sensing resource within the sensing resource set can be the same. For example, if the sensing resource set follows periodic time domain operation, one or more sensing resources within the sensing resource set can all follow periodic time domain operation. However, one or more sensing resources are configured individually, and the period and the size of the sensing resource set for each sensing resource can be configured independently.

[0211] As an example of signaling between a base station and a terminal, if a resource within a sensing resource set is set as a periodic resource, for example, by higher layer signaling, the sensing resource may be used repeatedly according to the set period. As another example, if a resource within a sensing resource set is set as a semi-periodic resource, for example, by higher layer signaling, the sensing resource may be activated according to a MAC-CE or DCI instruction from the base station, and the resource may be used repeatedly at each set period until a deactivation instruction of the MAC-CE or DCI is received. As another example, if a resource within a sensing resource set is set as a dynamic resource, the sensing resource may be activated according to a DCI instruction from the base station, and may also be activated according to the next DCI instruction. A plurality of resources to be activated according to the DCI instruction may be preset through higher layer signaling or / and MAC CE, and a resource corresponding to a value of a field indicating resource activation included in the DCI may be activated.

[0212] For example, in the case of base station-to-base station signaling, if a resource within a sensing resource set is configured as a periodic resource, the sensing resource can be used repeatedly according to the configured period. As another example, if a resource within a sensing resource set is configured as a semi-periodic resource, the sensing resource can be activated according to a sensing request and can be used repeatedly at the configured period until a deactivation instruction for the sensing request is received. As another example, if a resource within a sensing resource set is configured as a dynamic resource, the sensing resource can be activated according to a sensing request from the base station and can be used for transmission and reception once.

[0213] <Example 6: Message exchange and signaling method for base station-based sensing operation within an ISAC system>

[0214] The base station-based sensing operation within the ISAC system described above requires sharing the base station's sensing resource configuration information with other base stations and notifying the terminal of the base station's sensing operation information. Accordingly, a method for exchanging sensing system operation information between base stations and a method for configuring sensing resources between base stations and terminals for the above-described base station-based sensing operation is described in detail.

[0215] FIG. 16 is a diagram illustrating an example of a message exchange and signaling method for base station-to-base station bistatic sensing operation within an ISAC system according to one embodiment of the present disclosure.

[0216] According to FIG. 16, base station 1 (1602) and base station 2 (1603) can set cell-specific sensing resources operated by each base station to terminal 1 (1601) and terminal 2 (1604) through system information (1605 and 1606). Base station 1 (1602) and base station 2 (1603) can inform terminal 1 (1601) and terminal 2 (1604) of scheduling information (e.g., sensing service-specific resource setting information described above or deactivated sensing resource setting information described above) related to sensing within the sensing resources that each base station wants to use through RRC setting information (1607 and 1608). Depending on the setting information of each connected base station, the terminal can perform downlink reception or uplink transmission within the communication resources, and may not perform downlink reception or uplink transmission used for communication within the sensing resources.

[0217] Base stations can share configuration information related to the sensing system operated by each base station with other base stations. One base station (for example, base station 1 (1602)) can transmit (1609) its sensing system related information to another base station for sensing operation through the XnAP message protocol, and another base station (for example, base station 2 (1603)) can transmit (1616) a message response and its sensing system related information through the XnAP message protocol. When base station 1 (1602) wants to perform a sensing operation, it can transmit a sensing request (1610) to base station 2 (1603) through the XnAP message protocol, and base station 2 (1603), upon receiving the request, can transmit a response (1611) to the message to base station 1 (1602) through the XnAP message protocol.

[0218] Each base station can inform terminal 1 (1601) (or terminal 2 (1604)) of the resources to be actually used before transmitting and receiving a sensing signal based on the shared sensing information (1612, 1613). Base station 1 (1602) can transmit a sensing signal to an object to be sensed based on the shared sensing configuration information and sensing request (1614), and base station 2 (1603) can receive the sensing signal that has passed through the object. Base station 2 (1603) that receives the signal can generate a sensing result based on the collected sensing data and transmit it to base station 1 (1602) based on the XnAP message protocol (1615).

[0219] Sensing-related information set by the base station to the terminal may include time domain sensing resource configuration information, time domain sensing resource cycle information, or frequency domain sensing resource configuration information, and the above information may be included in SIB0, which is cell common information. Through the above configuration information, the terminal may not perform downlink signal / channel monitoring and reception or uplink transmission for communication on the sensing resource.

[0220] The RRC configuration information set by the base station to the terminal may include sensing-related information, and the information may include time domain sensing resource configuration information for flexible resources within the TDD DL-UL resource configuration, sensing resource cycle within the time domain, or sensing resource configuration information within the frequency domain. The resource configuration information within the time domain and frequency domain may refer to the content described with respect to the resource configuration information. In addition, configuration information indicating whether the sensing resource set by SIB0 or ​​the RRC configuration information is activated / deactivated may be included in the RRC configuration information. Alternatively, the information setting / indicating whether the sensing resource is activated / deactivated may be dynamically indicated through L1 signaling based on the resource configuration according to the RRC configuration information.

[0221] A shared message transmitted from base station to base station may follow the XnAP protocol definition. The message may include at least one of TDD DL-UL resource configuration information operated by the base station, cell-specific sensing configuration information (at least one of sensing time, frequency domain resource configuration information, or sensing resource cycle), beam information operable for sensing (at least one of number of beams, combination of beam resources in horizontal / vertical directions, or repeatability of beam resources), sensing capability (sensing transmission, sensing reception, sensing transmission and reception capability) or feedback capability (raw data only (signal strength, delay, Doppler, or angular spectrum), sensing processing information (distance, presence, velocity, location information, object characteristics), or both raw data and sensing processing information). A message defined by the XnAP protocol may include the sensing-related information and be included in an XN SETUP REQUEST or NG-RAN node Configuration Update message, or a separate message may be defined for sharing sensing information.

[0222] A response message for sharing sensing-related information transmitted from base station to base station may follow the XnAP protocol definition. The message may include at least one of a response for sharing sensing-related information, TDD DL-UL resource configuration information operated by the base station, cell-specific sensing configuration information (at least one of sensing time, frequency domain resource configuration information, or sensing resource cycle), beam information operable for sensing (at least one of number of beams, combination of beam resources in horizontal / vertical directions, or repeatability of beam resources), sensing capability (sensing transmission, sensing reception, whether sensing transmission and reception are possible), or feedback capability (raw data only (signal strength, delay, Doppler, or angular spectrum), sensing processing information (distance, presence, velocity, location information, object characteristics), or both raw data and sensing processing information). A message defined by the XnAP protocol may include the sensing-related information and be included in an XN SETUP RESPONSE or NG-RAN node Configuration Update ACK message, or a separate message for sharing sensing information may be defined.

[0223] A message for a sensing request transmitted from a base station to a base station may follow the XnAP protocol definition. The message may include at least one of a sensing mode that the base station wishes to perform (base station monostatic or base station-base station bistatic), a sensing role that the base station wishes to perform (sensing transmission, sensing reception, or sensing transmission and reception), a sensing role that the base station wishes to request from the counterpart base station (sensing transmission, sensing reception, or sensing transmission and reception), feedback information that the counterpart base station wishes to request, time / frequency resource information for performing sensing, or beam information for performing sensing. A separate XnAP protocol message for the sensing request may be defined.

[0224] A message for a sensing request response transmitted from a base station to a base station may follow the XnAP protocol definition. The message may include at least one of a response indicating whether sensing is possible for the request, a response indicating feedback information requested from the opposing base station, or a response indicating the availability of time / frequency resources (information) for performing sensing. A separate XnAP protocol message for the sensing request may be defined.

[0225] A message for sensing result feedback transmitted from a base station to another base station may follow the XnAP protocol definition. The message may include at least one of sensing success / failure information or sensing result information requested from the opposing base station. A separate XnAP protocol message for the sensing result feedback may be defined.

[0226] <Example 7: Trigger and resource sharing method for base station-based sensing within an ISAC system>

[0227] FIG. 17 is a diagram illustrating an example of a method by which a sensing transmission base station triggers sensing according to one embodiment of the present disclosure.

[0228] According to FIG. 17, the base station 1 (1701) in charge of sensing transmission can trigger sensing by sending a sensing request to the base station 2 (1702) in charge of sensing reception. The base station 1 (1701) can transmit a sensing request (1703) to the base station 2 (1702) through the XnAP protocol, and the base station 2 (1702) can transmit a response (1704) to the sensing request (1703) to the base station 1 (1701) through the XnAP protocol. The contents of the sensing request (1703) and the response (1704) to the sensing request can follow the contents described above. Accordingly, sensing is triggered, the base station 1 (1701) in charge of sensing transmission can transmit a sensing signal (1705), and the base station 2 (1702) can receive a signal passing through an object. Base station 2 (1702) can generate sensing result feedback requested from base station 1 (1701) and feed it back (1706) to base station 1 (1701) via XnAP protocol. The sensing result feedback can follow the above-described content. The sensing reception base station is expressed as one base station for the purpose of example only, and in reality, one or more base stations participate in sensing, and one or more sensing reception base stations can transmit feedback to the sensing transmission base station.

[0229] FIG. 18 is a diagram illustrating an example of a method by which a sensing receiving base station triggers sensing according to one embodiment of the present disclosure.

[0230] According to FIG. 18, the sensing reception-in-charge base station 2 (1802) can trigger sensing by performing a sensing request (1803) to the sensing transmission-in-charge base station 1 (1801). The base station 2 (1802) can transmit the sensing request (1803) to the base station 1 (1801) through the XnAP protocol, and the base station 1 (1801) can transmit a response (1804) to the sensing request (1803) to the base station 2 (1802) through the XnAP protocol. The contents of the sensing request (1803) and the response (1804) to the sensing request can follow the contents described above. Accordingly, sensing is triggered, the base station 1 (1801) as the sensing transmission-in-charge transmits a sensing signal (1805), and the base station 2 (1802) can receive a signal passing through an object. Base station 1 (1802) can generate sensing result feedback intended by its own base station. The sensing result feedback can follow the above-described content. The sensing transmitting base station is expressed as one base station for the purpose of example only, but in reality, one or more base stations can participate in sensing and transmit sensing signals, and the sensing receiving base station can feed back the sensing results for the sensing signals transmitted by one or more base stations to the one or more base stations, or feed back the sensing results for the sensing signals transmitted by each base station to each base station.

[0231] FIG. 19 is a diagram illustrating an example of a method for a third base station to trigger sensing according to one embodiment of the present disclosure.

[0232] According to FIG. 19, a third base station 1 (1901) that does not actually perform sensing can trigger sensing by performing a sensing request (1903) to base station 2 (1902) that can perform sensing. Base station 1 (1901) can transmit the sensing request (1903) to base station 2 (1902) via the XnAP protocol, and base station 2 (1902) can transmit a response (1904) to the sensing request (1903) to base station 1 (1901) via the XnAP protocol. The contents of the sensing request (1903) and the response (1904) to the sensing request can follow the contents described above. Accordingly, when sensing is triggered, base station 2 (1902) may be a monostatic capable base station having both sensing transceivers and sensing receivers, or may be a combination of different base stations performing bistatic sensing transmitting base station-sensing receiving base station. In the case of a monostatic capable base station, base station 2 (1902) may perform sensing in one base station (1905), and generate the sensing result as sensing result feedback requested by base station 1 (1901) and transmit it via the XnAP protocol (1906). The sensing result feedback may follow the content described above. Alternatively, when sensing is requested for a combination of bistatic base stations, the sensing transmitting base station may transmit the sensing signal (1905), and the sensing receiving base station may receive the sensing signal and generate the requested sensing result feedback and transmit it via the XnAP protocol (1906). The sensing result feedback may follow the content described above.

[0233] The above flowcharts illustrate exemplary methods that can be implemented according to the principles of the present disclosure, and various modifications may be made to the methods depicted in the flowcharts herein. For example, although depicted as a series of steps, various steps in each drawing may overlap, occur in parallel, occur in different orders, or occur multiple times. In other instances, steps may be omitted or replaced with other steps.

[0234] FIG. 20 is a diagram illustrating the structure of a terminal in a wireless communication system according to one embodiment of the present disclosure.

[0235] Referring to FIG. 20, the terminal may include a transceiver, which refers to a terminal receiving unit (2000) and a terminal transmitting unit (2010), a memory (not shown), and a terminal processing unit (2005, or a terminal control unit or processor). Depending on the communication method of the terminal described above, the transceiver units (2000, 2010), the memory, and the terminal processing unit (2005) of the terminal may operate. However, the components of the terminal are not limited to the examples described above. For example, the terminal may include more or fewer components than the components described above. In addition, the transceiver unit, the memory, and the processor may be implemented in the form of a single chip.

[0236] A transceiver unit can transmit and receive signals to and from a base station. The signals may include control information and data. To this end, the transceiver unit may include an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that low-noise amplifies and down-converts the frequency of a received signal. However, this is merely one embodiment of the transceiver unit, and the components of the transceiver unit are not limited to the RF transmitter and RF receiver.

[0237] Additionally, the transceiver can receive a signal through a wireless channel and output it to the processor, and transmit a signal output from the processor through the wireless channel.

[0238] Memory can store programs and data necessary for the terminal's operation. Furthermore, memory can store control information or data included in signals transmitted and received by the terminal. Memory can be comprised of a storage medium, such as ROM, RAM, a hard disk, CD-ROM, or DVD, or a combination of such storage media. Furthermore, there can be multiple memories.

[0239] Additionally, the processor can control a series of processes to enable the terminal to operate according to the aforementioned embodiments. There may be multiple processors, and the processors can perform component control operations of the terminal by executing programs stored in memory.

[0240] FIG. 21 is a diagram illustrating the structure of a base station in a wireless communication system according to one embodiment of the present disclosure.

[0241] Referring to FIG. 21, the base station may include a transceiver, which refers to a base station receiver (2100) and a base station transmitter (2110), a memory (not shown), and a base station processing unit (2105, or a base station control unit or processor). Depending on the communication method of the base station described above, the transceiver units (2100, 2110), the memory, and the base station processing unit (2105) of the base station may operate. However, the components of the base station are not limited to the examples described above. For example, the base station may include more or fewer components than the components described above. In addition, the transceiver, the memory, and the processor may be implemented in the form of a single chip.

[0242] The transceiver can transmit and receive signals with the terminal. Here, the signals may include control information and data. To this end, the transceiver may be configured with an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that low-noise amplifies and down-converts the frequency of a received signal. However, this is only one embodiment of the transceiver, and the components of the transceiver are not limited to the RF transmitter and RF receiver.

[0243] Additionally, the transceiver can receive a signal through a wireless channel and output it to the processor, and transmit the signal output from the processor through the wireless channel.

[0244] The memory can store programs and data necessary for the operation of the base station. Furthermore, the memory can store control information or data included in signals transmitted and received by the base station. The memory can be comprised of a storage medium, such as ROM, RAM, a hard disk, CD-ROM, or DVD, or a combination of such storage media. Furthermore, there can be multiple memories.

[0245] The processor can control a series of processes so that the base station can operate according to the embodiments of the present disclosure described above. There may be multiple processors, and the processors can perform component control operations of the base station by executing programs stored in memory.

[0246] The methods according to the embodiments described in the claims or specification of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

[0247] When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. The one or more programs stored in the computer-readable storage medium are configured for execution by one or more processors within an electronic device. The one or more programs include instructions that cause the electronic device to execute methods according to embodiments described in the claims or specification of the present disclosure.

[0248] These programs (software modules, software) may be stored in random access memory, non-volatile memory including flash memory, read only memory (ROM), electrically erasable programmable read only memory (EEPROM), magnetic disc storage devices, compact disc-ROMs (CD-ROMs), digital versatile discs (DVDs) or other forms of optical storage devices, magnetic cassettes, or may be stored in memories composed of some or all of these combinations. In addition, each configuration memory may include multiple copies.

[0249] Additionally, the program may be stored on an attachable storage device that is accessible via a communication network, such as the Internet, an intranet, a local area network (LAN), a wide LAN (WLAN), a storage area network (SAN), or a combination thereof. Such a storage device may be connected to a device implementing an embodiment of the present disclosure via an external port. Additionally, a separate storage device on the communication network may be connected to a device implementing an embodiment of the present disclosure.

[0250] In the specific embodiments of the present disclosure described above, components included in the invention are expressed singularly or plurally, depending on the specific embodiment presented. However, the singular or plural expressions are selected to suit the presented situation for convenience of explanation, and the present disclosure is not limited to singular or plural components. Components expressed in plural may be composed of singular elements, or components expressed in singular may be composed of plural elements.

[0251] Meanwhile, the embodiments of the present disclosure disclosed in this specification and drawings are merely specific examples to easily explain the technical contents of the present disclosure and to help the understanding of the present disclosure, and are not intended to limit the scope of the present disclosure. In other words, it will be apparent to those skilled in the art that other modifications based on the technical idea of ​​the present disclosure are possible. In addition, each of the above embodiments can be combined and operated with each other as needed. For example, parts of one embodiment of the present disclosure and another embodiment can be combined with each other to operate a base station and a terminal. In addition, other modifications based on the technical idea of ​​the above embodiments can be implemented with other systems such as a TDD LTE system, a 5G, or a NR system.

[0252] Meanwhile, the order of description in the drawings explaining the method of the present invention does not necessarily correspond to the order of execution, and the order of precedence may be changed or executed in parallel.

[0253] Alternatively, the drawings illustrating the method of the present invention may omit some components and include only some components within a scope that does not harm the essence of the present invention.

[0254] In addition, the method of the present invention may be implemented by combining some or all of the contents included in each embodiment within a scope that does not harm the essence of the invention.

[0255] Various embodiments of the present disclosure have been described above. The foregoing description of the present disclosure is for illustrative purposes only, and the embodiments of the present disclosure are not limited to the disclosed embodiments. Those skilled in the art will appreciate that the present disclosure can be readily modified into other specific forms without altering the technical spirit or essential characteristics of the present disclosure. The scope of the present disclosure is indicated by the claims described below rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present disclosure.

Claims

1. In a method performed by a first base station of a communication system, A step of transmitting a message including sensing-related information to a second base station; and A step of receiving a response message to a message including the sensing-related information from the second base station, The message including the sensing-related information includes at least one of cell-specific sensing resource setting information of the first cell corresponding to the first base station, beam information applicable to sensing, sensing capability information, or feedback capability information, A method characterized in that the response message includes at least one of response information for sharing the sensing-related information, cell-specific sensing resource setting information of the second cell corresponding to the second base station, beam information applicable to sensing, sensing capability information, or feedback capability information.

2. In paragraph 1, a step of transmitting a sensing request message to the second base station; and Further comprising the step of receiving a response message to the sensing request message from the second base station, The sensing request message includes at least one of sensing mode information that the first base station intends to perform, sensing role information that the first base station intends to perform, sensing role information that the second base station intends to request, feedback information that the second base station intends to request, time and / or frequency resource information that the sensing is to be performed, or sensing-related beam information. A method characterized in that the response message includes at least one of response information regarding the availability of sensing for a sensing request, response information regarding feedback information requested from the first base station, or response information regarding the availability of time and / or frequency resources for performing sensing.

3. In paragraph 1, a step of transmitting a sensing signal to the second base station; and Further comprising a step of receiving feedback information from the second base station, The above sensing signal is a signal for sensing or a signal for communication, A method characterized in that the above feedback information includes sensing result information determined based on the above sensing signal.

4. In paragraph 1, Further comprising a step of transmitting upper layer signaling including sensing resource information to the terminal, A method characterized in that the sensing resource information includes cell-specific sensing resource setting information of the first cell.

5. In paragraph 4, Further comprising a step of transmitting activation or deactivation information for sensing resources to the terminal, A method characterized in that the activation or deactivation information for the sensing resource indicates whether to activate or deactivate the sensing resource set by the cell-specific sensing resource setting information.

6. In the method performed by the terminal of the communication system, A step of receiving upper layer signaling including sensing resource information from a first base station; and A step of receiving activation or deactivation information for a sensing resource from the first base station, The above sensing resource information includes cell-specific sensing resource setting information, A method characterized in that the activation or deactivation information for the sensing resource indicates whether to activate or deactivate the sensing resource set by the cell-specific sensing resource setting information.

7. In paragraph 6, A method characterized in that the cell-specific sensing resource configuration information includes at least one of TDD (time division duplex) uplink-downlink configuration information of the first cell corresponding to the first base station, time axis configuration information of the sensing resource, frequency axis configuration information of the sensing resource, and a period of the sensing resource.

8. In the first base station of the communication system, At least one transceiver; At least one processor communicatively connected to said at least one transceiver; and Communicably connected to at least one processor, and executable individually or in any combination of said at least one processor, such that said terminal: Transmit a message containing sensing-related information to a second base station, and A memory storing a command for receiving a response message to a message including the sensing-related information from the second base station; Including, The message including the sensing-related information includes at least one of cell-specific sensing resource setting information of the first cell corresponding to the first base station, beam information applicable to sensing, sensing capability information, or feedback capability information, A first base station, characterized in that the response message includes at least one of response information for sharing the sensing-related information, cell-specific sensing resource setting information of the second cell corresponding to the second base station, beam information applicable to sensing, sensing capability information, or feedback capability information.

9. In paragraph 8, the command causes the first base station to: Transmit a sensing request message to the second base station, and To further receive a response message to the sensing request message from the second base station, The sensing request message includes at least one of sensing mode information that the first base station intends to perform, sensing role information that the first base station intends to perform, sensing role information that the second base station intends to request, feedback information that the second base station intends to request, time and / or frequency resource information that the sensing is to be performed, or sensing-related beam information. A first base station, characterized in that the response message includes at least one of response information regarding the availability of sensing for a sensing request, response information regarding feedback information requested from the first base station, or response information regarding the availability of time and / or frequency resources for performing sensing.

10. In paragraph 8, the command causes the first base station to: Transmitting a sensing signal to the second base station, and To receive more feedback information from the second base station, The above sensing signal is a signal for sensing or a signal for communication, A first base station, characterized in that the feedback information includes sensing result information determined based on the sensing signal.

11. In paragraph 8, the command is such that the first base station: To further transmit upper layer signaling containing sensing resource information to the terminal, A first base station, characterized in that the sensing resource information includes cell-specific sensing resource setting information of the first cell.

12. In paragraph 11, the command causes the first base station to: To further transmit activation or deactivation information for sensing resources to the above terminal, A first base station, characterized in that the activation or deactivation information for the sensing resource indicates whether to activate or deactivate the sensing resource set by the cell-specific sensing resource setting information.

13. At the terminal of the communication system, At least one transceiver; At least one processor communicatively connected to said at least one transceiver; and Communicably connected to at least one processor, and executable individually or in any combination of said at least one processor, such that said terminal: Receive upper layer signaling including sensing resource information from the first base station, and A memory storing a command to receive activation or deactivation information for a sensing resource from the first base station; Including, The above sensing resource information includes cell-specific sensing resource setting information, A terminal characterized in that the activation or deactivation information for the sensing resource indicates whether to activate or deactivate the sensing resource set by the cell-specific sensing resource setting information.

14. In paragraph 13, A terminal characterized in that the cell-specific sensing resource configuration information includes at least one of TDD (time division duplex) uplink-downlink configuration information of the first cell corresponding to the first base station, time axis configuration information of the sensing resource, frequency axis configuration information of the sensing resource, and a period of the sensing resource.

Images