Method and apparatus for performing dynamic cross-link interference measurement and reporting in a next-generation mobile communication system

Abstract

The present disclosure relates to a communication method and system for converging a fifth-generation (5G) communication system, which supports higher data rates than a fourth-generation (4G) system, with Internet of Things (IoT) technology. The present disclosure may be applied to intelligent services based on 5G communication technology and IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, healthcare, digital education, smart retail, security and safety services. The present disclosure provides a method for performing dynamic cross-link interference (CLI) measurement and reporting in a mobile communication system. According to an aspect of the present disclosure, a method performed by a terminal includes: receiving, from a base station, first information about a measurement object associated with CLI and second information about a reporting configuration, the first information including at least one of a configuration for a sounding reference signal (SRS) resource and a configuration for a resource for measuring a received signal strength indicator (RSSI) associated with CLI; obtaining a reference signal received power (RSRP) of at least one SRS based on the SRS resource and at least one bandwidth part (BWP) identifier (ID) included in the configuration for the SRS resource; and sending, to the base station, a measurement report including the RSRP based on the second information.

Description

Technical Field

[0001] The present disclosure relates to a method and apparatus for performing dynamic cross-link interference measurement and reporting in a mobile communication system. Background Art

[0002] To meet the growing demand for wireless data traffic since the deployment of the fourth-generation (4G) communication system, efforts have been made to develop improved fifth-generation (5G) or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also referred to as "beyond 4G networks" or "post-long term evolution (LTE) systems". The 5G communication system is considered to be implemented in a higher frequency (millimeter wave) band (e.g., 60 GHz band) in order to achieve higher data rates. To mitigate the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimension MIMO (FD-MIMO), array antennas, analog beamforming, and large antenna technologies are discussed in the 5G communication system. In addition, in the 5G communication system, system network improvements are being developed based on advanced small cells, cloud radio access network (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, coordinated multipoint (CoMP), receiver interference cancellation, etc. In the 5G system, hybrid frequency shift keying (FSK) and quadrature amplitude modulation (QAM) (FQAM) and sliding window superimposed coding (SWSC) as advanced coding modulation (ACM), and filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as advanced access technologies have been developed.

[0003] The Internet is a human-centered connected network in which humans generate and consume information, and is now evolving towards the Internet of Things (IoT), in which distributed entities such as things exchange information and are processed without human intervention. Through connection with a cloud server, the Internet of Everything (IoE) combining IoT technology and big data processing technology has emerged. Since IoT implementation requires technical elements such as "sensing technology", "wired / wireless communication and network infrastructure", "service interface technology", and "security technology", sensor networks, machine-to-machine (M2M) communication, machine type communication (MTC), etc. have been studied recently. Such an IoT environment can provide intelligent Internet technology services, creating new value for human life by collecting and analyzing data generated between interconnected things. Through the integration and combination of existing information technology (IT) and various industrial applications, IoT can be applied to various fields, including smart home, smart building, smart city, smart car or connected car, smart grid, healthcare, smart home appliances, and advanced medical services.

[0004] Accordingly, various attempts have been made to apply 5G communication systems to Internet of Things (IoT) networks. For example, technologies such as sensor networks, machine type communication (MTC), and machine-to-machine (M2M) communication can be implemented through beamforming, MIMO, and array antennas. Cloud radio access network (RAN), as an application of the above big data processing technology, can also be considered an example of the convergence between 5G technology and IoT technology.

[0005] Recently, reference signal measurement and reporting in 5G communication systems have been performed only based on downlink reference signals transmitted by a base station, and a process for a terminal to measure and report signals transmitted from another terminal has not been defined yet. Therefore, new processes and functions are needed.

[0006] The above information is presented only as background information to facilitate understanding of the present disclosure. No determination has been made, nor is any assertion made, as to whether any of the above can be applied as prior art to the present disclosure. SUMMARY OF THE INVENTION

[0007]

TECHNICAL PROBLEM

[0008] The present disclosure relates to receiving a report on cross-link interference information from a terminal and using the report to dynamically operate TDD resources in a serving cell configured with time division duplex (TDD). To this end, a series of operations for a terminal to measure and report uplink interference information transmitted from another terminal in an adjacent cell (or cross-link) will be defined. The interference information may be sounding reference signal-reference signal received power (SRS-RSRP) and cross-link interference-received signal strength indicator (CLI-RSSI).

[0009] In addition, reference signal measurement and reporting in existing new radio (NR) systems are performed based on downlink reference signals transmitted by a base station. However, a process for a terminal to measure and report signals transmitted from another terminal has not been defined yet, so new processes and functions are needed.

[0010] In particular, in the present disclosure, to solve the problem that accurate measurement may not be possible in the SRS resource configuration operation for sounding reference signal-reference signal received power (SRS-RSRP) measurement due to omission of bandwidth part (BWP) related information or frequency information, it is proposed to add BWP related information or frequency information. In addition, the present disclosure can allow dynamic on-off of the measurement of the configured SRS resources, thereby reducing operation time delay.

[0011]

SOLUTION

[0012] Aspects of the present disclosure at least solve the above problems and / or disadvantages and at least provide the following advantages. Accordingly, an aspect of the present disclosure is to provide an apparatus and method for performing dynamic cross-link interference measurement and reporting.

[0013] Additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the presented embodiments.

[0014] According to an aspect of the present disclosure, a method performed by a terminal in a wireless communication system is provided. The method includes: receiving, from a base station, first information about a measurement object associated with cross-link interference (CLI) and second information about a reporting configuration, the first information including at least one of a configuration for a sounding reference signal (SRS) resource and a configuration for a resource for measuring a received signal strength indicator (RSSI) associated with the CLI; obtaining a reference signal received power (RSRP) of at least one SRS based on the SRS resource and at least one bandwidth part (BWP) identifier (ID) included in the configuration for the SRS resource; and sending a measurement report including the RSRP to the base station based on the second information.

[0015] In an embodiment of the present disclosure, at least one SRS is identified based on the SRS resource, at least one BWP ID, and information about a serving cell included in the configuration for the SRS resource, the serving cell being associated with the at least one BWP ID.

[0016] In an embodiment of the present disclosure, sending the measurement report includes sending a measurement report including the RSRP to the base station when an RSRP threshold is included in the second information and is lower than the RSRP.

[0017] In an embodiment of the present disclosure, the method further includes: obtaining an RSSI associated with the CLI based on the configuration for the resource; and sending a measurement report including the RSSI to the base station when an RSSI threshold is included in the second information and the threshold is lower than the RSSI.

[0018] According to another aspect of the present disclosure, a method performed by a base station is provided. The method includes: sending, to a terminal, first information about a measurement object associated with cross-link interference (CLI) and second information about a reporting configuration, the first information including at least one of a configuration for a sounding reference signal (SRS) resource and a configuration for a resource for measuring a received signal strength indicator (RSSI) associated with the CLI; and receiving, based on the second information, a measurement report from the terminal, the measurement report including a reference signal received power (RSRP) of at least one sounding reference signal (SRS), wherein the RSRP of the at least one SRS is obtained based on the SRS resource and at least one bandwidth part (BWP) identifier (ID) included in the configuration of the SRS resource.

[0019] In an embodiment of the present disclosure, wherein the at least one SRS is identified based on the SRS resource, at least one BWP ID, and information about a serving cell included in the configuration of the SRS resource, the serving cell being associated with the at least one BWP ID.

[0020] In an embodiment of the present disclosure, wherein receiving the measurement report includes receiving, from the terminal, a measurement report including the RSRP when an RSRP threshold is included in the second information and is lower than the RSRP.

[0021] In an embodiment of the present disclosure, the method further includes: receiving, from the terminal, a measurement report including the RSSI when an RSSI threshold is included in the second information and the threshold is lower than the RSSI, wherein the RSSI associated with the CLI is obtained based on the configuration for the resource.

[0022] According to another aspect of the present disclosure, a terminal in a wireless communication system is provided. The terminal includes a transceiver and a controller, the controller being coupled to the transceiver and configured to: receive, from a base station, first information about a measurement object associated with cross-link interference (CLI) and second information about a reporting configuration, the first information including at least one of a configuration for a sounding reference signal (SRS) resource and a configuration for a resource for measuring a received signal strength indicator (RSSI) associated with the CLI; obtain a reference signal received power (RSRP) of at least one SRS based on the SRS resource and at least one bandwidth part (BWP) identifier (ID) included in the configuration for the SRS resource; and send, based on the second information, a measurement report including the RSRP to the base station.

[0023] In an embodiment of the present disclosure, wherein the at least one SRS is identified based on the SRS resource, at least one BWP ID, and information about a serving cell included in the configuration for the SRS resource, the serving cell being associated with the at least one BWP ID.

[0024] In an embodiment of the present disclosure, the controller is configured to send a measurement report including the RSRP to the base station when the RSRP threshold is included in the second information and is lower than the RSRP.

[0025] In an embodiment of the present disclosure, the controller is further configured to obtain the RSSI associated with the CLI based on the configuration for the resources, and send a measurement report including the RSSI to the base station when the RSSI threshold is included in the second information and the threshold is lower than the RSSI.

[0026] According to another aspect of the present disclosure, a base station in a wireless communication system is provided. The base station includes a transceiver and a controller. The controller is coupled to the transceiver and is configured to: send first information about a measurement object associated with cross-link interference (CLI) and second information about a reporting configuration to a terminal. The first information includes at least one of a configuration for a sounding reference signal (SRS) resource and a configuration for a resource for measuring the received signal strength indicator (RSSI) associated with the CLI; and receive a measurement report from the terminal based on the second information. The measurement report includes the reference signal received power (RSRP) of at least one sounding reference signal (SRS), where the RSRP of the at least one SRS is obtained based on the SRS resource and at least one bandwidth part (BWP) identifier (ID) included in the configuration for the SRS resource.

[0027] In an embodiment of the present disclosure, at least one SRS is identified based on the SRS resource, at least one BWP ID, and information about a serving cell included in the configuration for the SRS resource, and the serving cell is associated with the at least one BWP ID.

[0028] In an embodiment of the present disclosure, the controller is configured to receive a measurement report including the RSRP from the terminal when the RSRP threshold is included in the second information and is lower than the RSRP.

[0029] In an embodiment of the present disclosure, the controller is further configured to receive a measurement report including the RSSI from the terminal when the RSSI threshold is included in the second information and is lower than the RSSI, where the RSSI associated with the CLI is obtained based on the configuration for the resources.

[0030] From the following detailed description of various embodiments of the present disclosure disclosed in conjunction with the accompanying drawings, other aspects, advantages, and significant features of the present disclosure will become apparent to those skilled in the art.

[0031]

Beneficial effects

[0032] In a next-generation mobile communication system according to various embodiments of the present disclosure, a series of procedures for measuring an uplink signal transmitted from another terminal, for example, SRS-RSRP and CLI-RSSI, and reporting the measurement values to a base station may be defined. Accordingly, the base station receiving the measurement values may configure dynamic TDD based on the measurement values. In other words, when interference from an adjacent cell is strong, the TDD uplink allocation to a terminal may be restricted, and thus, data quality can be improved.

[0033] In addition, in various embodiments of the present disclosure, in an SRS resource configuration operation for SRS-RSRP measurement, BWP-related information or frequency information may be added to SRS measurement resource configuration information, and thus, more accurate measurement may be performed considering the BWP-related information or frequency information. In addition, the present disclosure may allow dynamic on / off measurement of the configured SRS resources, thereby reducing operation time delay. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] From the following description with reference to the drawings, the above and other aspects, features, and advantages of certain embodiments of the present disclosure will become more apparent, where:

[0035] Figure 1 Illustrates the structure of an LTE system according to an embodiment of the present disclosure;

[0036] Figure 2 Illustrates the radio protocol structure in an LTE system according to an embodiment of the present disclosure;

[0037] Figure 3 Illustrates the structure of a next-generation mobile communication system according to an embodiment of the present disclosure;

[0038] Figure 4 Illustrates the radio protocol structure in a next-generation mobile communication system according to an embodiment of the present disclosure;

[0039] Figure 5 Illustrates cross-link interference in the case of configuring a TDD cell in a next-generation mobile communication system according to an embodiment of the present disclosure;

[0040] Figure 6 Illustrates the overall process in which a terminal receives a measurement configuration including cross-link interference from a base station and transmits a measurement report related thereto to the base station in a next-generation mobile communication system according to an embodiment of the present disclosure;

[0041] Figure 7 Illustrates the structure of a media access control control element (MAC CE) indicating dynamic SRS measurement of cross-link interference according to an embodiment of the present disclosure;

[0042] Figure 8Illustrates the overall terminal operation for cross-link interference measurement and reporting according to an embodiment of the present disclosure;

[0043] Figure 9 Illustrates the overall terminal operation in the case where measurement reports are configured for cross-link interference according to an embodiment of the present disclosure;

[0044] Figure 10 Illustrates the overall base station operation for cross-link interference measurement and reporting according to an embodiment of the present disclosure;

[0045] Figure 11 Is a block diagram illustrating the internal structure of a terminal according to an embodiment of the present disclosure; and

[0046] Figure 12 Is a block diagram illustrating the configuration of a base station according to an embodiment of the present disclosure.

[0047] In all the figures, the same reference numerals are used to denote the same elements. Detailed Description

[0048] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of the various embodiments of the present disclosure defined by the claims and their equivalents. It includes various specific details to facilitate understanding, but these are only considered exemplary. Thus, those of ordinary skill in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the present disclosure. In addition, descriptions of well-known functions and structures may be omitted for clarity and conciseness.

[0049] The terms and words used in the following description and claims are not limited to the literal meanings, but are used solely by the inventors to enable a clear and consistent understanding of the present disclosure. Thus, it will be apparent to those skilled in the art that the following description of the various embodiments of the present disclosure is provided for illustrative purposes only and is not intended to limit the present disclosure as defined by the appended claims and their equivalents.

[0050] It should be understood that the singular forms "a" and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component surface" includes reference to one or more such surfaces.

[0051] Here, it will be understood that each block of the flowchart illustration and combinations of blocks in the flowchart illustration can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions executed via the processor of the computer or other programmable data processing apparatus create means for implementing the functions specified in one or more blocks of the flowchart. These computer program instructions may also be stored in a computer-usable or computer-readable memory, which can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-usable or computer-readable memory produce an article of manufacture including instruction means for implementing the functions specified in the flowchart block or blocks. The computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operations to be performed on the computer or other programmable device to produce a computer-implemented process, such that the instructions executed on the computer or other programmable device provide operations for implementing the functions specified in one or more blocks of the flowchart.

[0052] In addition, each block of the flowchart may represent a module, a segment of code, or a portion of code that includes one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions recited in the blocks may occur out of order. For example, two blocks shown in succession may in fact be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.

[0053] As used herein, a "unit" refers to a software element or a hardware element that performs a predetermined function, such as a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC). However, the meaning of a "unit" is not always limited to software or hardware. A "unit" may be configured to be stored in an addressable storage medium or to execute on one or more processors. Thus, a "unit" includes, for example, software elements, object-oriented software elements, class elements or task elements, processes, functions, attributes, procedures, subroutines, program code segments, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and parameters. Elements and functions provided by a "unit" may be combined into a smaller number of elements or "units" or divided into a larger number of elements or "units". In addition, elements and "units" may be implemented as replicating one or more CPUs within a device or a secure multimedia card. In addition, a "unit" in an embodiment may include one or more processors.

[0054] In the following, the operating principle of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description of the present disclosure, a detailed description of known functions or configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present disclosure. The terms to be described below are defined in consideration of the functions in the present disclosure and may vary according to the user, the user's intention, or custom. Therefore, the definitions of the terms should be based on the content of the entire specification.

[0055] In the following description, for convenience of description, the terms and names defined in the 3rd Generation Partnership Project Long Term Evolution (3GPP LTE) standard will be used to describe the present disclosure. However, the present disclosure is not limited to these terms and names and can be applied to systems conforming to other standards in the same manner.

[0056] In the following description, for convenience, terms for identifying access points, terms for referring to network entities, terms for referring to messages, terms for referring to interfaces between network entities, terms for referring to various identification information, etc. are illustratively used. Therefore, the present disclosure is not limited to the terms used below and other terms referring to subjects with equivalent technical meanings can be used. For example, in the following description, the term "terminal" may refer to the MAC entity in each terminal, which exists for each of the master cell group (MCG) and the secondary cell group (SCG).

[0057] In the following description, the base station is an entity that allocates resources to the terminal and may be at least one of a gNode B, eNode B, Node B, base station, radio access unit, base station controller, and node on the network. The terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing a communication function. Of course, the examples of the base station and the terminal are not limited thereto.

[0058] Specifically, the present disclosure can be applied to intelligent services (such as smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail business, security and safety-related services, etc.) based on 5G communication technology and Internet of Things-related technology. In the present disclosure, the term "eNB" may be used interchangeably with the term "gNB". That is, the base station described as "eNB" may indicate "gNB". In addition, the term "terminal" may refer to a mobile phone, an NB-IoT device, and a sensor, and may also refer to other wireless communication devices.

[0059] Wireless communication systems have evolved from early voice-centric service-providing wireless communication systems to broadband wireless communication systems that provide high-speed, high-quality packet data services according to communication standards such as High-Speed Packet Access (HSPA), Long-Term Evolution (LTE or Evolved Universal Terrestrial Radio Access (E-UTRA)), LTE-Advanced (LTE-A) and LTE-Pro of 3GPP, High-Speed Packet Data (HRPD) and Ultra Mobile Broadband (UMB) of 3GPP2, and IEEE 802.16e.

[0060] As a representative example of a broadband wireless communication system, the LTE system adopts an Orthogonal Frequency Division Multiplexing (OFDM) scheme in the downlink (DL) and a Single-Carrier Frequency Division Multiple Access (SC-FDMA) scheme in the uplink (UL). The uplink is the radio link through which a User Equipment (UE) or Mobile Station (MS) sends data or control signals to a base station (eNodeB or Base Station (BS)), and the downlink is the radio link through which the base station sends data or control signals to a terminal. The multiple access scheme as described above generally allocates and operates time and frequency resources for each user to send data or control information to prevent time and frequency resource overlap, that is, to establish orthogonality, so as to separate the data or control information of each user.

[0061] Future communication systems after LTE, namely 5G communication systems, must be able to freely reflect various demands from users, service providers, etc., and thus need to support services that meet all kinds of demands. Services considered in 5G communication systems include Enhanced Mobile Broadband (eMBB), Massive Machine-Type Communication (mMTC), Ultra-Reliable Low-Latency Communication (URLLC), etc.

[0062] According to some embodiments, eMBB aims to provide a data rate superior to that supported by existing LTE, LTE-A, or LTE-Pro. For example, in a 5G communication system, from the perspective of a base station, eMBB should be able to provide a peak data rate of 20 Gbps in the downlink and 10 Gbps in the uplink. In addition, a 5G communication system should not only be able to provide a peak data rate but also an increased user-perceived terminal data rate. To meet these requirements, various transmission and reception technologies may need to be improved in a 5G communication system, including further improved Multiple-Input Multiple-Output (MIMO) transmission technology. In addition, in the 2 GHz frequency band currently used by LTE, a transmission bandwidth of up to 20 MHz is used to send signals, but a 5G communication system uses a bandwidth wider than 20 MHz in the frequency band from 3 GHz to 6 GHz or 6 GHz and higher, thus meeting the data rate required in a 5G communication system.

[0063] In addition, mMTC is considering supporting application services such as the Internet of Things (IoT) in 5G communication systems. mMTC may be required to support the access of a large number of terminals in a cell, enhanced coverage of terminals, improved battery time, and reduced cost of terminals in order to effectively provide IoT. IoT needs to be able to support a large number of terminals in a cell (e.g., 1,000,000 terminals / km 2 ), as it is connected to various sensors and devices to provide communication functions. In addition, due to the nature of the service, terminals supporting mMTC are more likely to be located in shadow areas not covered by the cell, such as the basement of a building, and thus the terminal requires a wider coverage range than other services provided in 5G communication systems. Terminals supporting mMTC need to be configured as inexpensive terminals and may require a very long battery life, such as 10 to 15 years, as it is difficult to replace the battery of the terminal frequently.

[0064] Finally, URLLC is a cellular-based wireless communication service for mission-critical purposes and can be applied to services for remote control of robots or machines, industrial automation, unmanned aerial vehicles, telemedicine, emergency alerts, etc. Therefore, the communication provided by URLLC can offer very low latency (ultra-low latency) and very high reliability (ultra-high reliability). For example, services supporting URLLC need to satisfy an air interface waiting time of less than 0.5 milliseconds and may also require a packet error rate of 10% - 5% or lower.

[0065] Therefore, for services supporting URLLC, the 5G system needs to provide a transmission time interval (TTI) smaller than that of other services, and there may also be a design issue of allocating wide resources in the frequency band to ensure the reliability of the communication link.

[0066] The above three services considered in 5G communication systems, namely eMBB, URLLC, and mMTC, can be multiplexed and transmitted in a single system. Here, different transmission or reception schemes and different transmission and reception parameters can be used for the services in order to meet the different requirements of each service. However, the above mMTC, URLLC, and eMBB are merely examples of different types of services, and the types of services to be applied according to the present disclosure are not limited to the above examples.

[0067] In addition, hereinafter, embodiments of the present disclosure will be described by taking an LTE, LTE-A, LTE-Pro, or 5G (or NR, i.e., new generation mobile communication) system as an example, but the embodiments of the present disclosure can be applied to other communication systems having a similar technical background or channel form. In addition, those skilled in the art can apply the embodiments of the present disclosure to other communication systems with some modifications without significantly deviating from the scope of the present disclosure.

[0068] The method according to the claims or described embodiments of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

[0069] When the method is implemented as software, a computer-readable storage medium for storing one or more programs (software modules) may be provided. The one or more programs stored in the computer-readable storage medium are configured to be executed by one or more processors in an electronic device. The one or more programs include instructions that cause the electronic device to execute the method according to the claims or embodiments of the specification of the present disclosure.

[0070] Such a program (software module or software) may be stored in a non-volatile memory, including random access memory and flash memory, read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), magnetic disk storage devices, compact disc-ROM (CD-ROM), digital versatile disc (DVD), other types of optical storage devices, or magnetic tape cartridges. Alternatively, the program may be stored in a memory composed of some or all of the above memories in combination. In addition, multiple such memories may be included.

[0071] In addition, the program may be stored in an attachable memory that can be accessed through a communication network such as the Internet, intranet, local area network (LAN), wide area network (WLAN), or storage area network (SAN), or a communication network configured as a combination thereof. Such a storage device may access the electronic device implementing the embodiments of the present disclosure via an external port. In addition, additional storage devices on the communication network may access the electronic device implementing the embodiments of the present disclosure.

[0072] In the above embodiments of the present disclosure, depending on the described embodiments, one or more elements included in the present disclosure are expressed in the singular or plural form. However, the singular or plural form is appropriately selected for the sake of convenience in description for the assumed situation, and the present disclosure is not limited to the singular or plural form. An element expressed in the singular form may include multiple elements, and an element expressed in the plural form may include a single element.

[0073] Although specific embodiments are described in the detailed description of the present disclosure, it is obvious that various modifications and changes can be made without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure should not be construed as limited to the above embodiments, but should be understood to be defined by the appended claims and their equivalents.

[0074] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. When it is determined that such a detailed description may obscure the subject matter of the present disclosure, the detailed description of well-known functions or configurations incorporated herein may be omitted. In addition, the following terms are defined in consideration of the functionality in the present disclosure and may vary according to the intention, use, etc. of the user or operator. Therefore, they should be defined according to the overall content of the specification.

[0075] Advantages and features of the present disclosure and methods for implementing them can be more easily understood with reference to the following detailed description of the embodiments and the accompanying drawings. The present disclosure is not limited to the following embodiments and can be implemented in many different forms. These embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present disclosure to those skilled in the art, and the present disclosure is defined only by the appended claims. Throughout the specification, the same reference numerals refer to the same elements.

[0076] Hereinafter, the operating principle of the present disclosure will be described in detail with reference to the accompanying drawings. When it is determined that such a detailed description may obscure the subject matter of the present disclosure, the detailed description of well-known functions or configurations incorporated herein may be omitted. In addition, the following terms are defined in consideration of the functionality in the present disclosure and may vary according to the intention, use, etc. of the user or operator. Therefore, they should be defined according to the overall content of the specification. Hereinafter, for ease of description, terms for identifying access nodes, terms for indicating network entities, terms for indicating messages, terms for indicating interfaces between network entities, terms for indicating various types of identification information, etc. used in the following description are used as examples. Therefore, the present disclosure is not limited to the terms used below, and other terms indicating objects with equivalent technical meanings may be used.

[0077] For ease of description, the present disclosure uses terms and names defined in the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) standard or modified based on this standard. However, the present disclosure is not limited to these terms and names and can equally apply to systems according to other standards. That is, the system to which the present disclosure is applied can be the entire mobile communication system, especially the entire LTE system or NR system.

[0078] Figure 1 The structure of an LTE system according to an embodiment of the present disclosure is illustrated.

[0079] Reference Figure 1, the radio access network (RAN) of an LTE system includes evolved base stations (hereinafter referred to as "evolved Node B (eNB)", "Node B" or "base station") 1-05, 1-10, 1-15 and 1-20, a mobility management entity (MME) 1-25, and a serving gateway (S-GW) 1-30. A user equipment (hereinafter referred to as "UE" or "terminal") 1-35 accesses an external network via eNBs 1-05 to 1-20 and S-GW 1-30.

[0080] In Figure 1 , eNBs 1-05 to 1-20 correspond to existing Node Bs of a Universal Mobile Telecommunications System (UMTS). The eNBs are connected to the UE 1-35 via radio channels and perform more complex functions than the existing Node Bs. Since all user traffic data including real-time services such as Voice over Internet Protocol (VoIP) is served through shared channels in the LTE system, a device for collecting status information such as buffer status information, available transmission power status information, and channel status information of a UE and performing scheduling is required, and each of eNBs 1-05, 1-10, 1-15, and 1-20 serves as such a device. A single eNB generally controls multiple cells. For example, the LTE system uses a radio access technology such as Orthogonal Frequency Division Multiplexing (hereinafter referred to as "OFDM") in a 20 MHz bandwidth to achieve a data rate of 100 Mbps.

[0081] In addition, the LTE system also applies Adaptive Modulation and Coding (AMC) to determine a modulation scheme and a channel coding rate according to the channel state of a terminal. The S-GW 1-30 is a device for providing a data bearer and generates or releases a data bearer under the control of the MME 1-25. The MME is a device for performing mobility management functions and various control functions for a terminal and is connected to multiple base stations.

[0082] Figure 2 The figure shows a radio protocol structure in an LTE system according to an embodiment of the present disclosure.

[0083] Referring to Figure 2 , the radio protocols in the LTE system respectively include Packet Data Convergence Protocol (PDCP) 2-05 and 2-40, Radio Link Control (RLC) 2-10 and 2-35, and Medium Access Control (MAC) 2-15 and 2-30 in a terminal and an eNB. The PDCPs 2-05 and 2-40 perform operations such as IP header compression / recovery. The main functions of the PDCP are summarized as follows:

[0084] - Header compression and decompression: only Robust Header Compression (ROHC)

[0085] - Delivery of user data

[0086] - During the PDCP re-establishment procedure for RLC acknowledged mode (AM), in-sequence delivery of upper layer packet data units (PDUs).

[0087] - For split bearers in DC (RLC AM only): PDCP PDU routing for transmission and PDCP PDU reordering for reception

[0088] - During the PDCP re-establishment procedure for RLC AM, duplicate detection of lower layer service data units (SDUs).

[0089] - For RLC AM, retransmission of PDCP SDUs at handover and, for split bearers in DC, retransmission of PDCP PDUs during the PDCP data recovery procedure

[0090] - Encryption and decryption

[0091] - Timer-based SDU discard in the uplink.

[0092] The radio link control (hereinafter referred to as “RLC”) 2-10 and 2-35 reconfigures PDCP packet data units (PDUs) in appropriate sizes to perform automatic repeat request (ARQ) operations etc. The main functions of the RLC are outlined as follows:

[0093] - Delivery of upper layer PDUs

[0094] - Error correction by ARQ (for AM data delivery only)

[0095] - Concatenation, segmentation, and reassembly of RLC SDUs (for unacknowledged mode (UM) and AM data delivery only)

[0096] - Resegmentation of RLC data PDUs (for AM data delivery only)

[0097] - Reordering of RLC data PDUs (for UM and AM data delivery only)

[0098] - Duplicate detection (for UM and AM data delivery only)

[0099] - Protocol error detection (for AM data delivery only)

[0100] - RLC SDU discard (for UM and AM data delivery only)

[0101] - RLC re-establishment.

[0102] MAC 2-15 and 2-30 are connected to a number of RLC layer devices configured in a terminal, and perform operations of multiplexing RLC PDUs into MAC PDUs and demultiplexing RLC PDUs from MAC PDUs. The main functions of the MAC are outlined as follows:

[0103] - Mapping between logical channels and transport channels

[0104] - Multiplexing MAC SDUs belonging to one or different logical channels into transport blocks (TBs) delivered to the physical layer on the transport channel / Demultiplexing MAC SDUs belonging to one or different logical channels from the transport blocks delivered from the physical layer on the transport channel

[0105] - Scheduling information reporting

[0106] - Error correction via HARQ

[0107] - Priority handling between logical channels of a UE

[0108] - Priority handling between UEs via dynamic scheduling

[0109] - Multimedia Broadcast Multicast Service (MBMS) service identification

[0110] - Transport format selection

[0111] - Padding

[0112] The physical layer (PHY) 2-20 and 2-25 generate OFDM symbols by performing operations of channel coding and modulating upper layer data, and transmit the OFDM symbols through the radio channel, or perform operations of demodulating and channel decoding the OFDM symbols received through the radio channel and send them to the upper layer.

[0113] Figure 3 The figure shows the structure of a next-generation mobile communication system according to an embodiment of the present disclosure.

[0114] Reference Figure 3 , the radio access network in the next-generation mobile communication system includes a new radio node B (hereinafter referred to as "NR NB" or "NR gNB") 3-10 and a new radio core network (NR CN) 3-05. The new radio user equipment (hereinafter referred to as "NR UE" or "terminal") 3-15 accesses the external network through the NR gNB 3-10 and the NR CN 3-05.

[0115] In Figure 3Among them, NR gNB 3-10 corresponds to the evolved Node B (eNB) of the existing LTE system. The NR gNB can be connected to the NR UE 3-15 via the radio channel 3-20 and can thus provide services superior to those of the existing Node B. Since all user services in the next-generation mobile communication system are served via shared channels, a device for collecting status information such as buffer status information, available transmission power status information, and channel status information of each UE and performing scheduling is required, and the NR gNB 3-10 serves as such a device. A single NR gNB generally controls multiple cells. To achieve ultra-high-speed data transmission compared to the existing LTE, the NR gNB can have a maximum bandwidth equal to or higher than the existing maximum bandwidth and can additionally combine beamforming technology as a radio connection technology using orthogonal frequency division multiplexing (hereinafter referred to as "OFDM"). In addition, an adaptive modulation & coding (AMC) scheme that determines the modulation scheme and channel coding rate according to the channel state of the terminal is applied to the NR gNB. The NR CN 3-05 performs mobility support, bearer configuration, quality of service (QoS) configuration, etc. The NR CN is a device that not only performs the terminal mobility management function but also performs various types of control functions and is connected to multiple base stations. In addition, the next-generation mobile communication system can be linked to the existing LTE system, and the NR CN is connected to the MME 3-25 via a network interface. The MME is connected to the eNB 3-30, i.e., the existing base station.

[0116] Figure 4 FIG. illustrates a radio protocol structure in a next-generation mobile communication system according to an embodiment of the present disclosure.

[0117] Reference Figure 4 , the radio protocol in the next-generation mobile communication system includes NR service data adaptation protocol (SDAP) 4-01 and 4-45, NR PDCP 4-05 and 4-40, NR RLC 4-10 and 4-35, and NR MAC 4-15 and 4-30 in the terminal and the NR base station, respectively.

[0118] The main functions of the NR SDAP 4-01 and 4-45 may include some of the following functions:

[0119] - Transfer of user plane data

[0120] - Mapping between QoS flows and data radio bearers (DRBs) for both DL and UL

[0121] - Marking QoS flow IDs in both DL and UL packets

[0122] - Reflection QoS flow to DRB mapping of UL SDAP PDUs.

[0123] For an SDAP layer device, the terminal can receive, via a Radio Resource Control (RRC) message, the configuration of whether to use the header of the SDAP layer device or the function of the SDAP layer device for each PDCP layer device, each bearer, or each logical channel. When the SDAP header is configured, the terminal can be instructed to update or reconfigure the mapping information regarding the uplink and downlink QoS flows and data bearers with the NAS-reflected QoS 1-bit indicator and the AS-reflected QoS 1-bit indicator of the SDAP header. The SDAP header can include QoS flow ID information indicating QoS. The QoS information can be used as scheduling information or similar information to determine the data processing priority to ensure smooth services.

[0124] The main functions of NR PDCP 4-05 and 4-40 can include some of the following functions:

[0125] - Header compression and decompression: Only ROHC

[0126] - Delivery of user data

[0127] - Sequential transfer of upper-layer PDUs

[0128] - Unsequential transfer of upper-layer PDUs

[0129] - Reordering of PDCP PDUs for reception

[0130] - Duplicate detection of lower-layer SDUs

[0131] - Retransmission of PDCP SDUs

[0132] - Encryption and decryption

[0133] - Timer-based SDU discard in the uplink.

[0134] In the above description, the reordering function of the NR PDCP device refers to the function of reordering the PDCP PDUs received in the lower layer based on the PDCP sequence number (SN), and can include: the function of delivering data to the upper layer in the reordered order; the function of delivering data directly without considering the order; the function of recording the lost PDCP PDUs by reordering the order; the function of reporting the status of the lost PDCP PDUs to the sending end; and the function of requesting retransmission of the lost PDCP PDUs.

[0135] The main functions of NR RLC 4-10 and 4-35 can include some of the following functions:

[0136] - Delivery of upper-layer PDUs

[0137] - Sequential transfer of upper-layer PDUs

[0138] - Out-of-order transmission of upper-layer PDUs

[0139] - Error correction by ARQ

[0140] - Concatenation, segmentation, and reassembly of RLC SDUs

[0141] - Resegmentation of RLC data PDUs

[0142] - Reordering of RLC data PDUs

[0143] - Duplicate detection

[0144] - Protocol error detection

[0145] - RLC SDU discard

[0146] - RLC reconstruction.

[0147] In the above description, the in-order transmission function of the NR RLC device refers to the function of sequentially transmitting the RLC SDUs received from the lower layer to the upper layer, and may include: when a single RLC SDU is divided into multiple RLC SDUs and received, the function of rearranging and transmitting the divided multiple RLC SDUs; the function of rearranging the received RLC PDUs based on the RLC sequence number (SN) or PDCP sequence number (SN); the function of recording the lost RLC PDUs by rearranging the order; the function of reporting the status of the lost RLC PDUs to the sending end; the function of requesting retransmission of the lost RLC PDUs; when there is a lost RLC SDU, the function of only sequentially transmitting the RLC SDUs before the lost RLC SDU to the upper layer; even if there is a lost RLC SDU, if a predetermined timer expires, the function of sequentially transmitting all received RLC SDUs to the upper layer before the start of the timer; and even if there is a lost RLC SDU, if a predetermined timer expires, the function of transmitting all received RLC SDUs up to that point in time to the upper layer. In addition, the NR RLC can process the RLC PDUs in the order received (in the order of arrival without considering the order of sequence numbers or sequence numbers), and can deliver the processed RLC PDUs to the PDCP device regardless of their order (out-of-order delivery). In the case of segmentation, the NR RLC can receive the segments stored in the buffer or to be received later, reconfigure these segments into a complete RLC PDU, and then process the complete RLC PDU and deliver it to the PDCP device. The NR RLC layer may not include the concatenation function, and may perform the function in the NR MAC layer, or may replace this function with the multiplexing function of the NR MAC layer.

[0148] In the above description, the disordered delivery function of the NR RLC device refers to the function of directly delivering to the upper layer the RLC SDUs received from the lower layer without considering the order, and may include: when a single RLC SDU is divided into multiple RLC SDUs and received, the function of rearranging and delivering the divided multiple RLC SDUs; and the function of storing the RLC SN of each received RLC PDU, rearranging the RLC PDUs, and recording the lost RLC PDUs.

[0149] NR MAC 4-15 and 4-30 can be connected to several NR RLC layer devices configured in a terminal, and the main functions of the NR MAC may include some of the following functions:

[0150] - Mapping between logical channels and transport channels

[0151] - Multiplexing / demultiplexing of MAC SDUs

[0152] - Scheduling information reporting

[0153] - Error correction through HARQ

[0154] - Priority handling between logical channels of a UE

[0155] - Priority handling between UEs through dynamic scheduling

[0156] - MBMS service identification

[0157] - Transport format selection

[0158] - Padding

[0159] The NR physical layer (NR PHY) 4-20 and 4-25 can generate OFDM symbols by performing operations of channel coding and modulation on the upper layer data, and transmit the OFDM symbols through a radio channel, or can perform operations of demodulation and channel decoding on the OFDM symbols received through the radio channel, and send them to the upper layer.

[0160] Figure 5 The figure illustrates cross-link interference in the case of configuring a TDD cell in a next-generation mobile communication system according to an embodiment of the present disclosure.

[0161] Figure 5 The figure illustrates the impact of cross-link interference (CLI) when operating dynamic TDD scheduling / configuration in LTE and NR systems, which can be applied to the entire disclosure, and the present disclosure has been proposed to support the corresponding scenario. In addition, from the perspective of the base station, remote interference management (RIM) of the terminal can be performed by receiving and applying the measurement values of cross-link interference. For example, this can be achieved by applying dynamic TDD scheduling.

[0162] Reference Figure 5 , there can be a mobile communication network with TDD cells configured around it. For example, as Figure 5 shown, when the gNB 15-05 (or base station 1) in the serving cell to which the terminals 15-15 are connected supports the corresponding cell through TDD, the gNB 25-10 (or base station 2) in the adjacent cell can also support the corresponding cell through TDD. There can be a terminal 25-20 connected to the gNB 25-10 and served by the gNB 25-10. The transmission of data and downlink reference signal 5-25 sent from the base station 1 to the corresponding terminal can be received (measured) as uplink interference 5-35 at the base station 2. In addition, the transmission of data and uplink sounding reference signal (SRS) 5-30 sent by the terminal 25-20 to the base station 25-10 in the serving cell can be received as cross-link interference 5-40 at the terminal (such as the terminal 1) served by another serving cell (base station 15-05).

[0163] For example, the measured values of cross-link interference can include: SRS reference signal received power (SRS-RSRP), which is the RSRP value of the SRS resource measured by the terminal in the current serving cell relative to the SRS resource sent from the terminal in the adjacent cell; or, CLI received signal strength indicator (CLI-RSSI), which is the strength of the signal measured by the terminal in the current serving cell relative to all the signals sent from the terminal in the adjacent cell. In particular, in the present disclosure, the influence of cross-link interference between the terminals shown in 5-40 is considered.

[0164] The scheme for configuring uplink / downlink symbols in the NR TDD system can be different from the scheme for configuring uplink / downlink symbols in the LTE system, and is summarized as follows:

[0165] 1) Cell-specific configuration: Assign uplink symbols, downlink symbols, and flexible symbols through system information or common RRC signals

[0166] 2) UE-specific configuration: Assign uplink symbols or downlink symbols to the resources assigned as flexible symbols through dedicated RRC messages

[0167] 3) Configuration through group common indication: Change the flexible symbol through the group common physical downlink control channel (PDCCH), i.e., the slot format indicator (SFI)

[0168] 4) UE-specific indication: Change the flexible symbol through the UE-specific PDCCH, i.e., the downlink control indicator (DCI).

[0169] Basically, symbols for supporting uplink / flexible / downlink transmissions in a cell are allocated for each specific time slot, and the symbols allocated for flexible transmission for each terminal can be changed according to other transmission schemes. In the above description, the symbols for flexible transmission are flexible symbols, which can be indicated as symbols for uplink transmission and downlink transmission according to the base station configuration. If the corresponding flexible symbol is not changed for another transmission, neither uplink transmission nor downlink transmission is performed in the corresponding symbol.

[0170] For example, as Figure 5 shown, TDD modes 1 5 - 45, 5 - 50, and 5 - 55 can be configured in the cell supported by base station 1. That is, in a time slot that includes a total of 14 symbols, 6 symbols 5 - 45 for downlink transmission, 3 symbols 5 - 50 for flexible transmission, and 5 symbols 5 - 55 for uplink transmission can be sequentially configured. In addition, TDD modes 2 5 - 65, 5 - 70, and 5 - 75 can be configured in the cell supported by base station 2. That is, in a time slot that includes a total of 14 symbols, 2 symbols 5 - 65 for downlink transmission, 1 symbol 5 - 70 for flexible transmission, and 11 symbols 5 - 75 for uplink transmission can be sequentially configured. In this case, terminal 1 5 - 15 and terminal 2 5 - 20, which belong to base station 1 5 - 05 and base station 2 5 - 10 respectively, can send or receive data and reference signals according to the TDD resource information configured in the corresponding serving cell. The specific downlink period 5 - 60 configured for terminal 1 and the specific uplink period 5 - 80 of an adjacent cell may overlap, and terminal 1 5 - 15 at the cell edge may be affected by interference from the adjacent cell. In other words, in the downlink period 5 - 60, terminal 1 5 - 15 may receive cross - link interference from terminal 2 5 - 20, which may lead to deterioration of communication performance. Due to the deterioration of communication performance, the interference signal affects the intended received downlink signal, and the probabilities of reception failure and demodulation failure may be increased, so the data sending and receiving rate may be reduced.

[0171] Regarding the above problem, when measuring SRS - RSRP and CLI - RSSI in periods 5 - 60 and 5 - 80, where the base station indicates cross - link interference measurement to the terminal and the measured values are reported to the base station, the base station can identify the degree of cross - link interference on the terminal in the corresponding period. The base station can adjust the scheduling of resource allocation based on this, and can adjust the uplink / downlink transmission time slots and symbols of the terminal through dynamic TDD configuration.

[0172] Figure 5The overall scenario shown is not limited to the scenario between TDD cells and can be applied to a mobile communication network in which TDD cells and FDD cells are mixed or which only includes FDD cells.

[0173] Figure 6 The figure illustrates the entire process in which a terminal in an NR system receives a measurement configuration including cross-link interference from a base station and sends a measurement report related thereto to the base station according to an embodiment of the present disclosure.

[0174] The terminal 16-01 in the idle mode (RRC_IDLE) searches for a suitable cell in the cell (re)selection operation, camps on the corresponding base station 6-02 (6-05), and then performs an RRC connection (6-10) with the base station 6-02 according to the generation of data to be transmitted, and so on. In the idle mode, since there is no network connection due to reasons such as power saving of the terminal, the terminal may not send data, and for data transmission, it is necessary to switch to the connected mode (RRC_CONNECTED). In addition, when the terminal camps on a cell, this means that the terminal is in the corresponding cell and receives a paging message to determine whether to send data through the downlink. The terminal 16-01 successfully connects to the base station 6-02 through RRC, the state of the corresponding terminal is switched to the connected mode (RRC_CONNECTED), and the terminal in the RRC connected mode can send data to or receive data from the base station.

[0175] When a terminal in the connected mode moves within a cell or moves out of the cell, after handover from another cell / base station, the terminal can receive a command from the newly connected cell / base station to request (move for) data transmission or reception. For this purpose, the base station can provide a configuration (L3 measurement: a downlink reference signal such as CSI-RS or SSB) indicating measurement of another frequency / cell through an RRC message (6-15). The measurement indication may include a measurement object, conditions, and parameters so that the terminal reports the measurement result to the base station. In addition, in the present disclosure, not only the existing reporting of measurement through the downlink reference signal is configured and performed, but also Figure 5The measurement and reporting of cross-link interference described in [reference document] are also configured and performed. In operations 6 - 15, the base station may provide measurement configuration information (measConfig) to the terminal. Among this configuration information, in addition to the measurement configuration and reporting of the existing downlink reference signals, configuration information related to CLI measurement and reporting may be included. Additionally, in the measurement configuration information (measConfig), measurement object configuration (measObject), reporting configuration (reportConfig), configuration of measurement identifiers related to the measurement object and reporting scheme (measID), configuration indicating the type of value to be measured (quantityConfig), etc. may be included. The following ASN.1 specifies the measConfig signaling for reference.

[0176] Table 1 is an ASN.1 example for measurement configuration.

[0177] [Table 1]

[0178]

[0179] Furthermore, the following description focuses on the configuration information of cross-link interference (refer to the following ASN.1 related to the measurement object (MO)).

[0180] Table 2 is an ASN.1 example for MO configuration.

[0181] [Table 2]

[0182]

[0183] 1. Measurement Object (MO) Configuration

[0184] In the MO configuration scheme, a new MO solely for CLI measurement or a new MO that can be generally applied to measure signals other than downlink reference signals may be introduced. As an example of measuring signals other than downlink reference signals, there is uplink delay measurement, etc.

[0185] For example, the newly introduced measObject according to various embodiments may be defined to include a CLI measurement-specific MO solely for CLI measurement or other types of MOs for measuring signals other than downlink reference signals.

[0186] Furthermore, the newly introduced measObject may be defined to perform a report different from the existing reports. For example, the new type of report may be a report type for delivering log data.

[0187] When a new MO is introduced, information about the serving cell associated with the new MO may be required. For example, information about which cell the configured MO is timed based on may be additionally required. This is because information about how to define the system frame number (SFN) of the MO to be measured and how to configure other measurement frequencies and synchronization is needed. Alternatively, the MO can be applied to the configured cell (e.g., PCell).

[0188] In addition, regarding MO configuration, a scheme for adding parameters for CLI measurement-related configuration will be additionally considered. In the present disclosure, the following two schemes for adding CLI measurement parameters are proposed.

[0189] - The first CLI measurement parameter configuration scheme: This is a scheme of directly adding the configuration information of the resources (such as SRS resources) used for CLI measurement to the MO. This is a scheme of explicitly specifying the information required to configure the SRS resources by extending from the corresponding information element (IE) when using the existing measObjectNR. In the SRS resource configuration, it can include the number of ports through which the SRS is transmitted, frequency domain resource information and frequency hopping, the SRS resource transmission scheme (periodic, semi-periodic or aperiodic), etc., and the SRS resource configuration corresponds to the information on how to transmit the SRS resource to be measured and through which time and frequency resources.

[0190] - The second CLI measurement parameter configuration scheme: This is a scheme of indicating the configuration information of the CLI measurement resources (such as SRS resources) configured in the MO with reference to the existing SRS configuration (SRS-Config). For example, it can include the index information (srs-ResourceId) of the SRS-Resource in which the SRS resources are configured, or this parameter can be indicated by the index information (srs-ResourceSetId) of the SRS-ResourceSet in which the SRS resource set is configured. For this purpose, in the case where the SRS-Config is provided in the RRCReconfiguration, when configuring the SRS-Resource configured only for CLI measurement or the SRS-ResourceSet including the SRS-Resource configuration, information indicating that the SRS resource (or the SRS resources included in the SRS resource set) is for SRS measurement (CLI measurement) resource configuration rather than for SRS transmission configuration can be included. This information can be implemented as including a 1-bit indicator (CLI measurement indicator). When there is no indicator, the configuration information of the SRS transmission is used for determination.

[0191] In two scenarios of adding CLI measurement parameters, a MO can include multiple SRS resource configuration information, or multiple SRS resource configuration information can be configured to be included in one or more SRS resource set information. In addition, the MO for CLI measurement information can include SRS resources or CLI-RSSI resources, or can include both SRS resources and CLI-RSSI resources. This can be configured in the following ASN.1 structure.

[0192] Table 3 is an ASN.1 example of the MO configuration for CLI measurement.

[0193] [Table 3]

[0194]

[0195] In particular, the case where SRS resources are indicated for CLI measurement can be structurally different from the case where SRS resources are configured for transmission.

[0196] For example, as shown in Table 4 below, when the base station configures SRS resource transmission for the terminal, this configuration is carried out in the UL BWP in ServingCellConfig. That is to say, since the corresponding configuration is given for each BWP, the BWP-related configuration information is not included in SRS-Config itself. This is because the BWP information has been set in the upper-layer configuration.

[0197] Table 4 is an ASN.1 example of the SRS resource configuration for the transmission of SRS configured in the UL BWP in ServingCellConfig.

[0198] [Table 4]

[0199]

[0200] However, when the MO for CLI measurement includes SRS-Config, instead of configuring measurement configuration for each BWP, the measurement configuration is configured for each serving cell. Therefore, when using the existing SRS-Config IE, the BWP information in which the SRS resource is configured can be omitted, and the information about the BWP in which the SRS resource to be measured is actually transmitted may not be recognized. From the perspective of the terminal for measuring CLI, the terminal can measure the SRS resources measured in the activated DL BWP, but may not measure the entire SRS of the terminal for transmitting the SRS resource, so that the exact threshold may not be applied, and the reliability of applying the measurement result may be lost. In the present disclosure, the SRS resource configuration information for CLI measurement includes the BWP information applied when receiving the SRS resource in SRS-Config. For example, the BWP information may include the ID of the BWP to which the terminal actually transmits the SRS resource for transmitting the SRS resource, or the time-frequency resource information of the corresponding BWP. For example, the BWP may include information about the starting position in the frequency domain (absolute radio frequency channel number (ARFCN)), bandwidth, the number of physical resource blocks (PRBs), etc.

[0201] The frequency configuration of the SRS resource for measurement is signaled in SRS-Config as follows.

[0202]

[0203] However, the corresponding information means the frequency domain position of the SRS resource in a specific serving cell and BWP, and thus the absolute frequency domain position of the SRS resource may not be obtained. This is because the CLI measurement object may not be configured for each frequency, but all SRS resources configured for adjacent terminals can be configured in one MO. In addition, referring to RAN1 TS38.211 below, the frequency domain starting position of the SRS resource can be obtained as follows.

[0204]

[0205] That is, in order to accurately identify the position of the SRS resource from other terminals to be measured, at least additional configuration is required. Possible solution options can be as follows:

[0206] - Option 1: Absolute frequency position and bandwidth information or the number of PRBs (as described above)

[0207] - Option 2: Serving cell information (frequency information (which is negligible when the MO only includes SRS resources and is the same as the frequency of the current terminal) + cell ID) + the bandwidth starting point of the corresponding cell or BWP

[0208] - Option 3: Frequency domain starting point required to calculate the frequency domain position of the SRS resource:

[0209] 2. Measurement Report (MR) Configuration

[0210] In the measurement object configuration operation, the MO for CLI measurement is configured, and the terminal measures the resources configured for the corresponding MO. In this case, a scheme for reporting the MO to the base station needs to be determined, and the reporting conditions and scheme can be included in the measurement report configuration. In addition, the measurement report configuration can be configured to be associated with a specific MO (the MO for which CLI measurement is configured). In the following description, a measurement reporting scheme will be proposed and its detailed features will be described.

[0211] A. Periodic Reporting Configuration

[0212] ◆ According to various embodiments, a new reference signal type for periodic reporting of CLI measurement can be defined. That is, a dedicated information element (IE) for CLI periodic reporting can be introduced, and parameters related thereto can be configured. The period, the number of reports, information about the reporting resources, and the maximum number of resources included in the report can be included in the corresponding configuration, as mentioned in the following ASN.1.

[0213] Table 5 is an ASN.1 example of CLI periodic reporting configuration.

[0214] [Table 5]

[0215]

[0216] B. Event-Based Reporting Configuration

[0217] According to various embodiments, a new event-based reporting dedicated to CLI measurement reporting can be introduced.

[0218] ◆ New event: In the case where the SRS-RSRP or CLI-RSSI exceeds the configured threshold among the measurement values related to the MO.

[0219] This event can have the same procedure as the existing event A1, but the type of reference signal to be measured can be changed, and thus an event dedicated to this is introduced.

[0220] For example, a new event (Event I1) may have the same parameters as Event A1, but the type of reference signal and the threshold range applied to the corresponding a1 threshold may change. In other words, as shown in Table 6, a new MeasTriggerQuantity-CLI can be defined and used only for CLI measurement. This is because the RSRP threshold ranges applied to the existing downlink CSI-RS and SSB and the RSRP threshold range applied to the uplink SRS may be different from each other. Therefore, a new mapping table and index for SRS-RSRP measurement value and threshold mapping can be introduced and referenced. In addition, as described below, SRS-RSRP or CLI-RSSI can be configured for the MO of the CLI, or both SRS-RSRP and CLI-RSSI can be configured. One event can occur for one resource type. The resource type for triggering the event will be specified. The resource type can be specified according to one of the following two scenarios.

[0221] ● Configure the type of threshold (i1-Threshold-r16) used to trigger the event as SRS-RSRP or CLI-RSSI. That is, configure the MeasTriggerQuantityCLI-r16 value as SRS-RSRP-Range-r16 or CLI-RSSI-Range-r16.

[0222] ● Introduce an IE indicating the explicit resource type, for example, CLI-Measurement-Type (trigger type) = CHOICE[SRS, RSSI]. That is, specify one of the two resources.

[0223] Table 6 is an ASN.1 example of the MeasTriggerQuantity-CLI configuration dedicated to CLI measurement.

[0224] [Table 6]

[0225]

[0226] In addition, when multiple SRS resources are configured for the new Event I1, the following event-based SRS resource measurement reporting scheme can be considered according to the number of reports and their scenarios.

[0227] ◆ The first scheme for reporting multiple SRSs: This is a reporting scheme based on the measurement values of each configured SRS resource. When at least one of the SRS resources configured for the MO exceeds the threshold and triggers a measurement report, the report can be made to include the measurement values of all SRS resources included in the MO, or only the measurement values of the SRS resource that triggered the event.

[0228] ◆Second scheme for reporting multiple SRSs: This is a reporting scheme based on the average value of all configured SRS resources. When the average value of the measured values of the SRS resources configured for the MO exceeds a threshold and triggers a measurement report, the report can be made to include the measured values of all SRS resources included in the MO, or only the average measured values of the SRS resources that triggered the event.

[0229] In addition, a 1-bit indicator can be introduced to select the first scheme for reporting multiple SRSs and the second scheme for reporting multiple SRSs.

[0230] The terminal that has received the measured values configured as above sends a confirmation message indicating that the terminal has successfully received the configuration information (6-20) from the base station. For this purpose, the RRCReconfigurationComplete message can be used.

[0231] In operation 6-25, the terminal can send data to or receive data from the base station. In operation 6-30, the terminal starts measuring the measurement resources of the serving cell and the measurement objects 6-31, 6-32, 6-33, 6-34 of the terminal UE2 6-03 including CLI measurement and the measurement object 6-35 of the terminal UE N 6-04 configured in the above operation 6-15. In the above operation 6-30, for the MO with a downlink reference signal configured, the terminal measures the result of cell-level measurement, and for the MO related to CLI measurement, the terminal measures the configured SRS-RSRP and CLI-RSSI and determines the reporting conditions configured by the base station. Depending on whether intra-frequency measurement or inter-frequency measurement is performed, the configuration conditions can be configured differently. In particular, for the configuration of inter-frequency channel measurement, the carrier frequency information of the corresponding frequency needs to be indicated.

[0232] In operation 6-40, the terminal can trigger a measurement report according to the configured measurement report conditions, where the triggering scheme can include a periodic reporting scheme and an event-based reporting scheme. The detailed reporting configuration can follow the reporting scheme described in the above operation 6-15. In particular, when the terminal receives the configuration of the MO for CLI and performs measurement, the terminal measures the SRS resources that are not deactivated by the MAC CE among the SRS resources belonging to the active DL BWP in which the terminal is currently operating. Here, the measurement of the non-deactivated SRS resources means that from the perspective of the terminal, only the SRS transmission is measured. In addition, the terminal can only measure the RSSI resources belonging to the current active DL BWP.

[0233] In operation 6-45, the terminal reports measurement results to the base station via an RRC message. Among them, the report message may include at least one of serving cell measurement values, neighboring cell measurement values, or CLI measurement values. That is, all measurement values may exist, or the corresponding measurement values may be included. When the periodic reporting condition and the event-triggered reporting condition are satisfied, the terminal performs measurement and measurement reporting operations in operation 6-45 and has the following characteristics.

[0234] When the terminal performs event-based reporting in operation 6-45, that is, when measID is associated with measObjectCLI and ReportConfig is configured with event I1, the terminal determines whether the entry condition or the exit condition is satisfied in the CLI measurement resources of the CLI measurement type indicated in ReportConfig. When at least one resource newly satisfies the entry condition, or when at least one resource newly satisfies the exit condition, the terminal generates a measurement report and reports the measurement report. In the measurement report, only the serving cell measurement results and the CLI measurement results are included. The value used for the measurement report may be the actual measurement value or the average value of the configured SRS / RSSI resources.

[0235] In addition, the measurement values may not include the measurement values of neighboring cells other than the existing serving cell. The MeasObjectNR measurement scheme for the measurement and reporting of downlink signals in the current NR performs measurements on frequency regions that meet predetermined conditions in the indicated frequency region. Among them, the measurement results include serving cell measurement results, serving frequency neighboring cell measurements, and non-serving frequency neighboring cell measurement results. In addition, for the IE of the measurement report, instead of the existing ReportConfigNR, a new reporting configuration ReportConfigNR-CLI may be introduced. Alternatively, the measurement report may be restricted such that when the CLI measurement report is performed, the measurement report of the serving cell is also always performed. Measurement reports may be performed for each of SRS-RSRP and CLI-RSSI.

[0236] Later, in operation 6-50, the base station may analyze the measurement values based on the measurement values received from the terminal and apply them to network management. For example, the base station may apply this analysis to the handover process and dynamic TDD scheduling and perform the same operations.

[0237] In addition, in the present disclosure, a method is proposed for dynamically enabling / disabling measurement indication for some SRS resource information configured in a CLI MO configured by an RRC message by introducing a new MAC CE for optimization by a dynamically applied measurement through the CLI. In operation 6-55, the base station may send a MAC CE to the terminal to indicate a dynamic update of the measurement indication for some SRS resources configured for the CLI MO. In operation 6-60, the terminal may update the measurement information with the information indicated by the MAC CE and perform relevant measurements. A detailed description of the MAC CE structure and features will be provided below in conjunction with the following embodiments.

[0238] Figure 7 FIG. illustrates the structure of a MAC CE indicating dynamic SRS measurement for cross-link interference according to an embodiment of the present disclosure. The present disclosure enables dynamic enabling / disabling of measurement indication for some SRS resource information configured in a CLI MO configured by an RRC message, thereby minimizing the latency time. Possible options are described below.

[0239] A first option for dynamically updating the resources to be measured in the SRS resources configured for the MO for the CLI is to introduce a bitmap-type SRS resource indication MAC CE.

[0240] Reference Figure 7 , the detailed structure and operation of the bitmap-type SRS resource indication MAC CE according to various embodiments are as follows.

[0241] - Reserved bits 7-05: These are necessary for byte alignment of the MAC CE.

[0242] - Serving cell ID 7-10 (6 bits): This is the serving cell identifier to which the SRS resource for CLI measurement is configured.

[0243] - BWP ID 7-15 (2 bits): This is the BWP identifier to which the SRS resource for CLI measurement is configured. Alternatively, information corresponding to the starting position in the frequency domain where the SRS resource is configured can be added. In this case, the required number of bits can be determined according to a determination made later and can exceed the 2 bits as Figure 7 shown.

[0244] -SRS Resource ID 7-20 (64 bits): This is the SRS resource ID used for CLI measurement in the RRC configuration. For the SRS resource IDs that need to be measured, the SRS resource ID is set to 1, while for the SRS resource IDs that do not need to be measured, the SRS resource ID is set to 0. The size of the bitmap is configured to be the maximum value of the SRS resources to be measured. If the identifiers are mixed and used for both the SRS resources for measurement and the SRS resources for transmission, the size of the bitmap increases proportionally to the total amount of all SRS resources.

[0245] The second option for dynamically updating the resources to be measured in the SRS resources configured for CLI MO is to introduce an explicit ID type SRS resource indication MAC CE.

[0246] - Reserved bits 7-25 and 7-50: These are required for byte alignment of the MAC CE.

[0247] - Serving cell ID 7-30 and 7-55 (6 bits): This is the serving cell identifier to which the SRS resources for CLI measurement are configured.

[0248] - BWP ID 7-35 and 7-60 (2 bits): This is the BWP identifier to which the SRS resources for CLI measurement are configured.

[0249] - Activation / Deactivation Indicator (A / D) 7-40 and 7-65 (1 bit): This is the dynamic activation / deactivation indicator for the CLI measurement SRS resources configured through RRC.

[0250] - SRS Resource ID 7-45 and 7-70 (7 bits): This is the SRS resource ID for CLI measurement configured through RRC, and the activation indicator and deactivation indicator are in a set. When the activation / deactivation indicator is set to 1, the CLI measurement of the SRS resource ID is performed, and when the activation / deactivation indicator is set to 0, the CLI measurement of the SRS resource ID is aborted.

[0251] In the MAC CE structure, there can be multiple MOs for CLI, and SRS resources can be configured for each MO. Therefore, the measurement of the SRS resources included in a specific MO can also be controlled as a whole. In this case, for the identifiers that can refer to the MO, for example, measObjectID or measID can be used. Alternatively, a field including measObjectID can be added in the above MAC CE.

[0252] Figure 8 Illustrated is the overall terminal operation for cross-link interference measurement and reporting according to an embodiment of the present disclosure.

[0253] In the above Figure 6 , the entire process of cross-link interference measurement and reporting is illustrated from the perspective of the system, and Figure 8 cross-link interference measurement and reporting will be described in the general framework of the terminal.

[0254] Refer to Figure 8 . In operation 8-05, a terminal with an RRC connection can receive a measurement configuration from the base station, and the configuration can include measObject, reportConfig, measID, quantityConfig, etc. In particular, the MO configuration specifies the signal to be measured and the resources of that signal to be measured. An existing downlink reference signal CSI-RS and SSB can be configured, and in the present disclosure, CLI measurement information including SRS-RSRP and CLI RSSI is included in the MO configuration. For the CLI MO configuration, the following can be considered, and refer to Figure 6 for the detailed information and suggestions related thereto.

[0255] ● Introduce a new MO for CLI measurement

[0256] ● A scheme including SRS / RSSI resource configuration information for CLI (including the configuration of SRS / RSSI resources to be measured in the MO)

[0257] ● A scheme for mapping BWP information or frequency information when configuring CLI SRS resources

[0258] In addition, in the measurement configuration in the above operation, a report configuration can be added, and specifically, it can include report conditions associated with the MO for CLI. In the present disclosure, the report configuration will focus on event-based reporting, and refer to Figure 6 for the detailed information and suggestions.

[0259] ● Definition of an event in the case where the SRS-RSRP / CLI-RSSI measurement value exceeds a threshold: Introduce a new event I1

[0260] ● The reporting quantity and reporting scheme in the case where multiple SRS resources are configured

[0261] ◆ A scheme for reporting only the measurement values of the SRS resources that trigger the event, or a scheme for reporting all the measurement values of all the configured SRS resources

[0262] ◆ A scheme for determining the measurement value by following the actual SRS-RSRP value or by using the average measurement value of the configured SRS resources

[0263] ● A solution that uses a threshold different from the thresholds used for existing SRS measurements and event triggering (for SRS / RSSI only) to introduce a new CLI measurement reporting configuration

[0264] In operation 8-10, the terminal performs measurements on the MO configured according to the measurement configuration received in operation 8-05. In operation 8-10, when there is an MO configuration associated with the CLI, measurements are performed on the SRS / RSSI resources configured in the MO, and in this case, the measurements are performed in the time and frequency resources of the activated downlink BWP.

[0265] In operation 8-15, the terminal identifies the reporting conditions for CLI measurements of the measurements, includes the measurement values in the measurement results, and prepares a report when the reporting conditions are met. The measurement reporting conditions can be used for both periodic reporting and event-based reporting, and when the value based on SRS-RSRP / CLI-RSSI measurements exceeds a threshold and a new event S1 is introduced, event-based reporting can be triggered.

[0266] In operation 8-20, the terminal receives the measurement results including the measurement values generated in operation 8-15 through an RRC message and sends the measurement results. Here, measurement reporting is performed separately according to whether the triggered resource is SRS-RSRP or CLI-RSSI. Later, the terminal can perform handover or resource reconfiguration according to the RRCReconfiguration message sent from the base station.

[0267] Figure 9 The figure illustrates the overall terminal operation in the case where measurement reporting is configured for cross-link interference according to an embodiment of the present disclosure.

[0268] Reference Figure 9 , in operation 9-05, the terminal receives CLI measurement configuration information, where the terminal receives CLI MO configuration, configuration of event-based measurement reporting and periodic measurement reporting associated with the CLI MO, etc. The configuration information can be included in the measurement configuration information and received through an RRCReconfiguration message. For a detailed description of the configuration, refer to operation 6-15 in Figure 6 .

[0269] In operations 9-10, the terminal performs CLI measurements according to the configured measurement and reporting conditions. When periodic reporting is configured as the CLI measurement reporting condition, the terminal performs measurements according to the configured periodicity and reporting conditions. When event-based measurement reporting is configured for the CLI measurement MO, the terminal triggers event-based reporting according to whether the measured values (SRS-RSRP / CLI-RSSI) of the SRS resources and CLI-RSSI in the configured CLI measurement MO exceed the corresponding thresholds. The detailed process operates in the same way as the existing event A1, and the thresholds applied to it can be redefined to have values within a new range. This is because the RSRP ranges of uplink reference signals and downlink reference signals can be applied in different ways. If a new RSRP range is introduced, the range can be redefined for each ranging of SRS-RSRP and CLI-RSSI measurements, and the range can be applied only to CLI measurements, especially SRS-RSRP and CLI-RSSI mapping. New events (e.g., event I1) for measurement reporting can be introduced, and the process of event A1 can be applied to the whole process without any change. The ReportOnLeave configuration and operation can be introduced without any change, so the introduction of events such as event A2 (or the introduction of event I2) can be omitted. Event I2 can have a condition that triggers the event when the measured SRS-RSRP / CLI-RSSI value drops to less than or equal to the threshold. In this disclosure, the corresponding event is not introduced, and event A1 (I1) and ReportOnLeave can replace the corresponding event as a similar function.

[0270] In operations 9-15, according to the measurement results obtained in operations 9-10, when the CLI measurement results meet the specific event conditions, the terminal triggers a measurement report and includes the corresponding measured values.

[0271] In operations 9-20, depending on the reporting scheme configured for the terminal, the terminal can operate in different ways. That is, when one or more of multiple SRS resource configurations and RSSI resource configurations are included in the MO configured for CLI measurement, the terminal can trigger the measured values applied to event triggering based on the actual measured values or average measured values. The terminal includes the actual CLI measurement values or average measured values in the measurement results according to the determined measurement reporting scheme. In this case, only the measurement information of the SRS and RSSI resources that trigger the event can be included, or the measurement information of all SRS resources / RSSI resources included in the configured MO can be included. In addition, the measurement information can include the SRS-RSRP value or CLI-RSSI value, and this means that measurement reporting is performed separately according to the resource type.

[0272] When the departure condition for the corresponding event is satisfied in operation 9-25, the report of the corresponding event is executed again (9-35, operation 9-20 is executed again at the current time point). The entry condition and departure condition for event I1 are as follows. When the departure condition is not satisfied in operation 9-25, no separate operation is executed (9-30).

[0273] Inequality I1-1 (entry condition)

[0274] Mi-Hys>Thresh

[0275] Inequality I1-2 (departure condition)

[0276] Mi+Hys<Thresh

[0277] In operation 9-40, the terminal can receive a MAC CE indicating dynamic measurement indication of SRS resources. Among them, for some SRS resources configured for the CLI MO, dynamic update of the measurement indication can be indicated. In operation 9-45, the terminal uses the information indicated by the corresponding MAC CE to update the measurement information and performs relevant measurements. Later, the terminal performs CLI measurement and reporting again based on the configured information.

[0278] Figure 10 The figure shows the entire base station operation for cross-link interference measurement and reporting according to an embodiment of the present disclosure.

[0279] In particular, Figure 10 including performing CLI measurement configuration and sending CLI measurement configuration. It is described in detail in Figure 6 .

[0280] When there is a terminal with an RRC connection, the corresponding base station can provide measurement configuration information to the terminal through RRC configuration, so as to sequentially apply the information for terminal mobility and scheduling. In the present disclosure, the description will focus on CLI measurement, and in combination with Figure 10 the basic description will be omitted, and only the description of CLI measurement will be given.

[0281] Refer to Figure 10 In operation 10-05, the base station can execute CLI measurement configuration, and for this configuration, an MO configuration including SRS resource configuration can be set. The scheme for configuring the MO in operation 10-05 can include: using the existing measObjectNR without change; and introducing a new MO (measObjectNR-CLI) and including CLI-specific configuration. The corresponding configuration is described in detail in operation 6-15 of Figure 6 .

[0282] In operation 10-10, the base station may set configuration information for reporting in the measurement configuration information for CLI measurement. In operation 10-10, the periodic reporting and event-based measurement reporting as reporting configuration schemes may be configured separately, and parameters related to the conditions and schemes required for the corresponding reporting may be included. Refer to Figure 6 Operation 6-15 in

[0283] In operation 10-15, the base station includes the measurement configuration information configured in operations 10-05 and 10-10 in the RRCReconfiguration message, and sends the configuration information for CLI measurement and reporting to the terminal through the RRCReconfiguration message. Basically, the measurement configuration process in the NR system is applied, and the terminal that has received the information performs CLI measurement and reporting according to the information sent from the base station.

[0284] In operation 10-20, the base station receives the measurement results included in the measurement report sent from the terminal. Here, the CLI measurement results are included in the report according to the reporting conditions associated with the MO related to the CLI measurement.

[0285] When the measurement report received in operation 10-25 corresponds to the measurement results of the neighboring cell and the serving cell associated with the existing downlink received signal, in operation 10-30, the base station may determine to perform a handover based on the received measurement values. In addition, in operation 10-35, the handover operation may be executed.

[0286] However, in operation 10-40, when the measurement report received in operation 10-25 corresponds to the measurement results associated with the CLI measurement values, the base station may determine the dynamic allocation of TDD resources based on the corresponding measurement results. In operation 10-45, the base station may directly perform dynamic TDD scheduling, or may perform scheduling in the existing resources to reduce interference. In the above description, dynamic TDD resource scheduling means that when it is determined based on the CLI measurement results from the terminal that there is significant cross-link interference in the corresponding DL measurement resources, the corresponding resources are not changed to the uplink transmission resources in the TDD resources. In addition, the resources with less interference may be changed to the uplink transmission resources (time).

[0287] Figure 11 is a block diagram illustrating the internal structure of a terminal according to an embodiment of the present disclosure.

[0288] Refer to Figure 11 , the terminal includes a radio frequency (RF) processor 11-10, a baseband processor 11-20, a memory 11-30, and a controller 11-40.

[0289] The RF processor 11-10 performs functions of transmitting or receiving signals through a radio channel, such as signal band conversion and amplification. That is, the RF processor 11-10 up-converts the baseband signal provided from the baseband processor 11-20 into an RF band signal, transmits the converted RF band signal through the antenna, and down-converts the RF band signal received through the antenna into a baseband signal. For example, the RF processor 11-10 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), etc. Although only a single antenna is shown in Figure 11 , the terminal may include multiple antennas. In addition, the RF processor 11-10 may include multiple RF chains. In addition, the RF processor 11-10 may perform beamforming. For beamforming, the RF processor 11-10 may adjust the phase and amplitude of signals transmitted or received through multiple antennas or antenna elements. The RF processor 11-10 may also perform MIMO and may receive data of multiple layers during MIMO operation.

[0290] The baseband processor 11-20 performs conversion between a baseband signal and a bit stream based on the physical layer specification of the system. For example, during data transmission, the baseband processor 11-20 generates complex symbols by encoding and modulating the transmission bit stream. In addition, during data reception, the baseband processor 11-20 reconstructs the received bit stream by demodulating and decoding the baseband signal provided from the RF processor 11-10. For example, according to the orthogonal frequency division multiplexing (OFDM) scheme, during data transmission, the baseband processor 11-20 generates complex symbols by encoding and modulating the transmission bit stream, maps the complex symbols to subcarriers, and then configures OFDM symbols by performing an inverse fast Fourier transform (IFFT) operation and cyclic prefix (CP) insertion. In addition, during data reception, the baseband processor 11-20 divides the baseband signal provided from the RF processor 11-10 into OFDM symbol units, reconstructs the signal mapped to subcarriers by performing a fast Fourier transform (FFT) operation, and then reconstructs the received bit stream by demodulating and decoding the signal.

[0291] The baseband processors 11-20 and the RF processor 11-10 transmit and receive signals as described above. Accordingly, each of the baseband processors 11-20 and the RF processor 11-10 may also be referred to as a transmitter, a receiver, a transceiver, or a communication unit. In addition, at least one of the baseband processors 11-20 and the RF processor 11-10 may include a plurality of communication modules to support a variety of different radio access technologies. In addition, at least one of the baseband processors 11-20 and the RF processor 11-10 may include a plurality of communication modules to process signals of different frequency bands. For example, different radio access technologies may include wireless local area network (LAN) (e.g., IEEE 802.11), cellular networks (e.g., LTE), etc. In addition, different frequency bands may include super high frequency (SHF) (e.g., 2NRHz and NRHz) bands and millimeter wave (mmWave) (e.g., 60 GHz) bands.

[0292] The memory 11-30 stores data for the operation of the terminal, such as basic programs, applications, configuration information, etc. Specifically, the memory 11-30 may store information related to a second access node that performs wireless communication using a second radio access technology. The memory 11-30 provides the stored data in response to a request from the controller 11-40.

[0293] The controller 11-40 controls the overall operation of the terminal. For example, the controller 11-40 transmits or receives signals through the baseband processors 11-20 and the RF processor 11-10. In addition, the controller 11-40 records data in the memory 11-30 or reads data from the memory 11-30. To this end, the controller 11-40 may include at least one processor 11-42. For example, the controller 11-40 may include a communication processor (CP) for controlling communication and an application processor (AP) for controlling an upper layer such as an application.

[0294] Figure 12 is a block diagram illustrating the configuration of a base station according to an embodiment of the present disclosure.

[0295] Reference Figure 12 , the base station includes an RF processor 12-10, a baseband processor 12-20, a backhaul communication unit 12-30, a memory 12-40, and a controller 12-50.

[0296] The RF processor 12-10 performs functions of transmitting or receiving signals through a radio channel, such as signal band conversion and amplification. That is, the RF processor 12-10 up-converts the baseband signal provided by the baseband processor 12-20 into an RF band signal, transmits the converted RF band signal through an antenna, and down-converts the RF band signal received through the antenna into a baseband signal. For example, the RF processor 12-10 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, etc. Although only a single antenna is shown in Figure 12 , a base station may include multiple antennas. In addition, the RF processor 12-10 may include multiple RF chains. In addition, the RF processor 12-10 may perform beamforming. For beamforming, the RF processor 12-10 may adjust the phase and amplitude of signals transmitted or received through multiple antennas or antenna elements. The RF processor 12-10 may perform downlink MIMO operations by transmitting one or more layers of data.

[0297] The baseband processor 12-20 performs conversion between a baseband signal and a bit stream based on the physical layer specifications of a first radio access technology. For example, during data transmission, the baseband processor 12-20 generates complex symbols by encoding and modulating the transmission bit stream. In addition, during data reception, the baseband processor 12-20 reconstructs the received bit stream by demodulating and decoding the baseband signal provided by the RF processor 12-10. For example, according to the OFDM scheme, during data transmission, the baseband processor 12-20 generates complex symbols by encoding and modulating the transmission bit stream, maps the complex symbols to subcarriers, and then configures OFDM symbols by performing IFFT operations and CP insertion. In addition, during data reception, the baseband processor 12-20 divides the baseband signal provided by the RF processor 12-10 into OFDM symbol units, reconstructs the signals mapped to subcarriers by performing FFT operations, and then reconstructs the received bit stream by demodulating and decoding the signals. The baseband processor 12-20 and the RF processor 12-10 transmit and receive signals as described above.

[0298] Therefore, each of the baseband processor 12-20 and the RF processor 12-10 may also be referred to as a transmitter, a receiver, a transceiver, a communication unit, or a wireless communication unit.

[0299] The backhaul communication unit 12-30 provides an interface for communicating with other nodes in the network. That is, the backhaul communication unit 12-30 converts the bit stream sent from the master base station to another node into a physical signal, or converts the physical signal received from another node into a bit stream, and the other node is, for example, a secondary base station, a core network, etc.

[0300] The memory 12-40 stores data for the operation of the terminal, such as basic programs, applications, configuration information, etc. Specifically, the memory 12-40 may store information related to the bearers allocated to the connected terminal, measurement results reported from the connected terminal, etc. In addition, the memory 12-40 may store information used as a criterion for determining whether to provide multi-connection to the terminal. The memory 12-40 provides the stored data according to the request of the controller 12-50.

[0301] The controller 12-50 controls the overall operation of the master base station. For example, the controller 12-50 transmits or receives signals through the baseband processor 12-20 and the RF processor 12-10 or through the backhaul communication unit 12-30. In addition, the controller 12-50 records data on the memory 12-40 or reads data from the memory 12-40. To this end, the controller 12-50 may include at least one processor 12-52.

[0302] In the above detailed embodiments of the present disclosure, according to the presented detailed embodiments, the elements included in the present disclosure are expressed in singular or plural. However, for the convenience of description, the singular form or the plural form is appropriately selected for the presented situation, and the present disclosure is not limited to the elements expressed in singular or plural. Therefore, the elements expressed in plural may also include a single element, or the elements expressed in singular may also include multiple elements.

[0303] Although specific embodiments have been described in the detailed description of the present disclosure, various modifications and changes can be made without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure should not be defined as limited to the embodiments, but should be defined by the appended claims and their equivalents.

[0304] It should be understood that the various embodiments of the present disclosure and the terms used therein are not intended to limit the technical features set forth herein to a particular embodiment, but include various variations, equivalents, and / or alternatives of the corresponding embodiments. Regarding the description of the drawings, like reference numerals may be used to represent like or related elements. It should be understood that the singular form of a noun corresponding to an item may include one or more things, unless the relevant context clearly indicates otherwise. As used herein, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "at least one of A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" may include all possible combinations of the items listed together in the corresponding phrase. As used herein, terms such as "first", "second", "first", and "second" may be used simply to distinguish the corresponding elements from another element and do not limit these elements in other respects (e.g., importance or order). It should be understood that if an element (e.g., the first element) is referred to as "coupled to", "coupled with", "connected to", or "connected with" another element (e.g., the second element), whether or not the terms "operably" or "communicatively" are used, this means that the element can be directly (e.g., wired), wirelessly, or via another element (e.g., the third element) coupled to the other element.

[0305] As used herein, the term "module" may include a unit implemented in hardware, software, or firmware and may be used interchangeably with other terms, e.g., "logic", "logic block", "component", or "circuit". A "module" may be the smallest unit of a single integrated component suitable for performing one or more functions or a part thereof. For example, according to one embodiment, a "module" may be implemented in the form of an application specific integrated circuit (ASIC).

[0306] The various embodiments set forth herein may be implemented as software (e.g., a program) that includes instructions stored in a machine (e.g., a computer) - readable storage medium (e.g., internal memory or external memory). The machine is a device that can call the stored instructions from the storage medium and operate according to the called instructions and may include an auxiliary base station or a terminal according to various embodiments. When the instructions are executed by a processor (e.g., the controllers 11 - 40, 12 - 50 in the device diagram), the processor may perform at least one function according to at least one instruction, perform the function corresponding to the instruction, and use or not use other components under the control of the processor. The instructions may include code generated by a compiler or code executable by an interpreter.

[0307] The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Herein, the term "non-transitory" merely means that the storage medium is a tangible device and does not include signals (e.g., electromagnetic waves), but this term does not distinguish between the location where data is stored semi-permanently in the storage medium and the location where data is temporarily stored in the storage medium.

[0308] The methods according to various embodiments of the present disclosure may be included in and provided in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., Compact Disc Read-Only Memory (CD-ROM)), or distributed online (e.g., downloaded or uploaded) via an application store (e.g., PlayStore TM ) or directly between two user devices (e.g., smart phones). If distributed online, at least a part of the computer program product may be generated temporarily or stored at least temporarily in a machine-readable storage medium, such as the memory of a manufacturer's server, the server of an application store, or a relay server.

[0309] According to various embodiments, each of the above elements (e.g., a module or a program) may include a single entity or multiple entities. According to various embodiments, one or more of the above elements may be omitted, or one or more other elements may be added. Alternatively or additionally, multiple elements (e.g., modules or programs) may be integrated into a single element. In this case, according to various embodiments, the integrated element may still perform one or more functions of each of the multiple elements in the same or similar manner as performed by a corresponding one of the multiple elements before integration. According to various embodiments, the operations performed by a module, a program, or another element may be performed sequentially, in parallel, repeatedly, or heuristically, or one or more operations may be performed in a different order or omitted, or one or more other operations may be added.

[0310] According to the above various embodiments, the operations performed by a module, a program, or another element may be performed sequentially, in parallel, repeatedly, or heuristically, or one or more operations may be performed in a different order or omitted, or one or more other operations may be added.

[0311] According to various embodiments, Figures 1 to 12 the methods of the various embodiments shown may include a combination of methods from one or more of the drawings.

[0312] For example, Figures 1 to 12 operations related to cross-link interference measurement and reporting processes are shown, and according to various embodiments, these methods may include a combination of methods from one or more of the drawings.

[0313] Although the present disclosure has been shown and described with reference to various embodiments thereof, those skilled in the art will understand that various changes may be made in form and detail without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents.

Claims

1. A method performed by a terminal in a communication system, the method comprising: Receiving, from a base station, information on a measurement configuration including a measurement object configuration and a reporting configuration, wherein the measurement object configuration includes a sounding reference signal (SRS) resource configuration, wherein the SRS resource configuration includes information on an SRS resource for cross-link interference (CLI) measurement and information on a bandwidth part (BWP) including an ID of the BWP associated with reception of the SRS resource for CLI measurement; Measuring, based on the SRS resource configuration, a reference signal received power (RSRP) of the SRS received on the SRS resource; And Sending, based on the reporting configuration, a measurement report including CLI measurement information on the RSRP of the SRS to the base station.

2. The method according to claim 1, wherein The information on the SRS resource for CLI measurement includes at least one of information on the number of ports, information on frequency hopping, and information on frequency domain resources, wherein the information on the BWP is used to determine a reference point of the SRS resource for CLI measurement, and wherein the SRS resource configuration further includes information on a serving cell for which the BWP is configured.

3. The method according to claim 1, Among them, The reporting configuration includes an event-triggered reporting configuration, wherein the event-triggered reporting configuration includes a threshold on the RSRP of the SRS, and wherein sending of a measurement report including information on the RSRP of the SRS is triggered based on determining that the RSRP of the SRS is higher than the threshold.

4. The method according to claim 1, Among them, The measurement object configuration further includes a resource configuration on a received signal strength indicator (RSSI) associated with CLI measurement, wherein the resource configuration on the RSSI associated with CLI measurement includes information on a resource on which the RSSI is to be measured, wherein the reporting configuration includes an event-triggered reporting configuration, wherein the event-triggered reporting configuration includes a threshold on the RSSI associated with CLI measurement, wherein the RSSI associated with CLI measurement is determined by performing a measurement on the resource, and wherein sending of a measurement result on CLI measurement including information on the RSSI associated with CLI measurement is triggered based on determining that the RSSI associated with CLI measurement is higher than the threshold.

5. A method performed by a base station in a communication system, the method comprising: Sending to a terminal information on a measurement configuration including a measurement object configuration and a reporting configuration, wherein the measurement object configuration includes a sounding reference signal (SRS) resource configuration, wherein the SRS resource configuration includes information on an SRS resource for cross-link interference (CLI) measurement and information on a bandwidth part (BWP) including an ID of the BWP associated with reception of the SRS resource for CLI measurement; And Receiving from the terminal a measurement report including CLI measurement information on a reference signal received power (RSRP) of the SRS, wherein the RSRP of the SRS is measured based on the SRS resource configuration, and wherein the measurement of the SRS resource is based on the SRS resource configuration.

6. The method according to claim 5, Among them, The information on the SRS resource for CLI measurement includes at least one of the information on the number of ports, the information on frequency hopping, and the information on frequency-domain resources. Among them, the information on the BWP is used to determine the reference point of the SRS resource for CLI measurement, and among them, the SRS resource configuration further includes the information on the serving cell for which the BWP is configured.

7. The method according to claim 5, Among them, The reporting configuration includes an event-triggered reporting configuration, wherein the event-triggered reporting configuration includes a threshold for the RSRP of the SRS, and wherein the reception of the measurement report including the information on the RSRP of the SRS is based on determining that the RSRP of the SRS is higher than the threshold.

8. The method according to claim 5, Among them, The measurement object configuration further includes a resource configuration for the received signal strength indicator (RSSI) associated with the CLI measurement, wherein the resource configuration for the RSSI associated with the CLI measurement includes the information on the resources on which the RSSI is to be measured, wherein the reporting configuration includes an event-triggered reporting configuration, wherein the event-triggered reporting configuration includes a threshold for the RSSI associated with the CLI measurement, wherein the RSSI associated with the CLI measurement is based on the measurement of the resources, and wherein the reception of the measurement result of the CLI measurement including the information on the RSSI associated with the CLI measurement is based on determining that the RSSI associated with the CLI measurement is higher than the threshold.

9. A terminal in a communication system, the terminal comprising: a transceiver; and a controller, coupled to the transceiver and configured to: receive from a base station information on a measurement configuration including a measurement object configuration and a reporting configuration, wherein the measurement object configuration includes a sounding reference signal (SRS) resource configuration, wherein the SRS resource configuration includes the information on the SRS resource for cross-link interference (CLI) measurement and the information on the bandwidth part (BWP) including the ID of the BWP associated with the reception of the SRS resource for CLI measurement, measure, based on the SRS resource configuration, the reference signal received power (RSRP) of the SRS received on the SRS resource, and send, based on the reporting configuration, a measurement report including CLI measurement information on the RSRP of the SRS to the base station.

10. The terminal according to claim 9, Among them, The information on the SRS resource for CLI measurement includes at least one of the information on the number of ports, the information on frequency hopping, and the information on frequency-domain resources. Among them, the information on the BWP is used to determine the reference point of the SRS resource for CLI measurement, and among them, the SRS resource configuration further includes the information on the serving cell for which the BWP is configured.

11. The terminal according to claim 9, Among them, The reporting configuration includes an event-triggered reporting configuration, wherein the event-triggered reporting configuration includes a threshold for the RSRP of the SRS, and wherein the transmission of the measurement report including the information on the RSRP of the SRS is triggered based on determining that the RSRP of the SRS is higher than the threshold.

12. The terminal according to claim 9, Among them, The measurement object configuration further includes resource configuration regarding the received signal strength indicator (RSSI) associated with CLI measurement, wherein the resource configuration regarding the RSSI associated with CLI measurement includes information about the resources on which RSSI is to be measured, wherein the reporting configuration includes event-triggered reporting configuration, wherein the event-triggered reporting configuration includes a threshold regarding the RSSI associated with CLI measurement, wherein the RSSI associated with CLI measurement is determined by performing measurements on the resources, and wherein the triggering of sending a measurement result regarding CLI measurement including information about the RSSI associated with CLI measurement is based on determining that the RSSI associated with CLI measurement is higher than the threshold.

13. A base station in a wireless communication system, the base station comprising: a transceiver; and a controller, coupled to the transceiver and configured to: send information about a measurement configuration including a measurement object configuration and a reporting configuration to a terminal, wherein the measurement object configuration includes sounding reference signal (SRS) resource configuration, wherein the SRS resource configuration includes information about the SRS resources for cross-link interference (CLI) measurement and information about the bandwidth part (BWP) including the ID of the BWP related to the reception of the SRS resources for CLI measurement, and receive a measurement report from the terminal including CLI measurement information about the reference signal received power (RSRP) of the SRS, wherein the RSRP of the SRS is measured based on the SRS resource configuration, and wherein the measurement of the SRS resources is based on the SRS resource configuration.

14. The base station according to claim 13, Among them, the information about the SRS resources for CLI measurement includes at least one of information about the number of ports, information about frequency hopping, and information about frequency domain resources, wherein the information about the BWP is used to determine the reference point of the SRS resources for CLI measurement, wherein the SRS resource configuration further includes information about the serving cell for which the BWP is configured, wherein the reporting configuration includes event-triggered reporting configuration, wherein the event-triggered reporting configuration includes a threshold regarding the RSRP of the SRS, and wherein the reception of the measurement report including information about the RSRP of the SRS is based on determining that the RSRP of the SRS is higher than the threshold.

15. The base station according to claim 13, Among them, the measurement object configuration further includes resource configuration regarding the received signal strength indicator (RSSI) associated with CLI measurement, wherein the resource configuration regarding the RSSI associated with CLI measurement includes information about the resources on which RSSI is to be measured, wherein the reporting configuration includes event-triggered reporting configuration, wherein the event-triggered reporting configuration includes a threshold regarding the RSSI associated with CLI measurement, wherein the RSSI associated with CLI measurement is based on measurements of the resources, and wherein the reception of the measurement result regarding CLI measurement including information about the RSSI associated with CLI measurement is based on determining that the RSSI associated with CLI measurement is higher than the threshold.

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