Method and device for receiving and transmitting information

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. According to an embodiment, a method performed by a user equipment (UE) is provided. The method comprises receiving, from a base station, configuration information on a channel state information (CSI) report, wherein the configuration information includes first information on a first resource for a channel measurement, second information on a second resource for a prediction of a report quantity, and third information on a time gap, performing the prediction of the report quantity for the second resource for time instances, based on the channel measurement for the first resource and transmitting, to the base station, the CSI report including information on the report quantity, wherein an earliest time instance of the time instances is after a reference time corresponding to a latest resource of the first resource by the time gap.

Description

METHOD AND DEVICE FOR RECEIVING AND TRANSMITTING INFORMATION

[0001] The present disclosure relates generally to wireless communication systems. More specifically, the present disclosure relates to a method and device for receiving and transmitting information.

[0002] 5G mobile communication technologies define broad frequency bands such that high transmission rates and new services are possible, and can be implemented not only in “Sub 6GHz” bands such as 3.5GHz, but also in “Above 6GHz” bands referred to as mmWave including 28GHz and 39GHz. In addition, it has been considered to implement 6G mobile communication technologies (referred to as Beyond 5G systems) in terahertz (THz) bands (for example, 95GHz to 3THz bands) in order to accomplish transmission rates fifty times faster than 5G mobile communication technologies and ultra-low latencies one-tenth of 5G mobile communication technologies.

[0003] At the beginning of the development of 5G mobile communication technologies, in order to support services and to satisfy performance requirements in connection with enhanced Mobile BroadBand (eMBB), Ultra Reliable Low Latency Communications (URLLC), and massive Machine-Type Communications (mMTC), there has been ongoing standardization regarding beamforming and massive MIMO for mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, supporting numerologies (for example, operating multiple subcarrier spacings) for efficiently utilizing mmWave resources and dynamic operation of slot formats, initial access technologies for supporting multi-beam transmission and broadbands, definition and operation of BWP (BandWidth Part), new channel coding methods such as a LDPC (Low Density Parity Check) code for large amount of data transmission and a polar code for highly reliable transmission of control information, L2 pre-processing, and network slicing for providing a dedicated network specialized to a specific service.

[0004] Currently, there are ongoing discussions regarding improvement and performance enhancement of initial 5G mobile communication technologies in view of services to be supported by 5G mobile communication technologies, and there has been physical layer standardization regarding technologies such as V2X (Vehicle-to-everything) for aiding driving determination by autonomous vehicles based on information regarding positions and states of vehicles transmitted by the vehicles and for enhancing user convenience, NR-U (New Radio Unlicensed) aimed at system operations conforming to various regulation-related requirements in unlicensed bands, NR UE Power Saving, Non-Terrestrial Network (NTN) which is UE-satellite direct communication for providing coverage in an area in which communication with terrestrial networks is unavailable, and positioning.

[0005] Moreover, there has been ongoing standardization in air interface architecture / protocol regarding technologies such as Industrial Internet of Things (IIoT) for supporting new services through interworking and convergence with other industries, IAB (Integrated Access and Backhaul) for providing a node for network service area expansion by supporting a wireless backhaul link and an access link in an integrated manner, mobility enhancement including conditional handover and DAPS (Dual Active Protocol Stack) handover, and two-step random access for simplifying random access procedures (2-step RACH for NR). There also has been ongoing standardization in system architecture / service regarding a 5G baseline architecture (for example, service based architecture or service based interface) for combining Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) for receiving services based on UE positions.

[0006] As 5G mobile communication systems are commercialized, connected devices that have been exponentially increasing will be connected to communication networks, and it is accordingly expected that enhanced functions and performances of 5G mobile communication systems and integrated operations of connected devices will be necessary. To this end, new research is scheduled in connection with eXtended Reality (XR) for efficiently supporting AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality) and the like, 5G performance improvement and complexity reduction by utilizing Artificial Intelligence (AI) and Machine Learning (ML), AI service support, metaverse service support, and drone communication.

[0007] Furthermore, such development of 5G mobile communication systems will serve as a basis for developing not only new waveforms for providing coverage in terahertz bands of 6G mobile communication technologies, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), array antennas and large-scale antennas, metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional space multiplexing technology using OAM (Orbital Angular Momentum), and RIS (Reconfigurable Intelligent Surface), but also full-duplex technology for increasing frequency efficiency of 6G mobile communication technologies and improving system networks, AI-based communication technology for implementing system optimization by utilizing satellites and AI (Artificial Intelligence) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technology for implementing services at levels of complexity exceeding the limit of UE operation capability by utilizing ultra-high-performance communication and computing resources.

[0008] According to an embodiment, a method performed by a user equipment (UE) is provided. The method comprises receiving, from a base station, configuration information on a channel state information (CSI) report, wherein the configuration information includes first information on a first resource for a channel measurement, second information on a second resource for a prediction of a report quantity, and third information on a time gap, performing the prediction of the report quantity for the second resource for time instances, based on the channel measurement for the first resource and transmitting, to the base station, the CSI report including information on the report quantity, wherein an earliest time instance of the time instances is after a reference time corresponding to a latest resource of the first resource by the time gap.

[0009] According to an embodiment, a method performed by a base station is provided. The method comprises transmitting, to a user equipment (UE), configuration information on a channel state information (CSI) report, wherein the configuration information includes first information on a first resource for a channel measurement, second information on a second resource for a prediction of a report quantity, and third information on a time gap and receiving, from the UE, the CSI report including information on the report quantity, wherein the prediction of the report quantity for the second resource for time instances is based on the channel measurement for the first resource, and wherein an earliest time instance of the time instances is after a reference time corresponding to a latest resource of the first resources by the time gap.

[0010] According to an embodiment, a user equipment (UE) comprises at least one transceiver, at least one processor communicatively coupled to the at least one transceiver and at least one memory, communicatively coupled to the at least one processor, storing instructions executable by the at least one processor individually or in any combination to cause the UE to receive, from a base station, configuration information on a channel state information (CSI) report, wherein the configuration information includes first information on a first resource for a channel measurement, second information on a second resource for a prediction of a report quantity, and third information on a time gap, perform the prediction of the report quantity for the second resource for time instances, based on the channel measurement for the first resource, and transmit, to the base station, the CSI report including information on the report quantity, wherein an earliest time instance of the time instances is after a reference time corresponding to a latest resource of the first resource by the time gap.

[0011] According to an embodiment, a base station comprises at least one transceiver, at least one processor communicatively coupled to the at least one transceiver and at least one memory, communicatively coupled to the at least one processor, storing instructions executable by the at least one processor individually or in any combination to cause the base station to transmit, to a user equipment (UE), configuration information on a channel state information (CSI) report, wherein the configuration information includes first information on a first resource for a channel measurement, second information on a second resource for a prediction of a report quantity, and third information on a time gap, and receive, from the UE, the CSI report including information on the report quantity, wherein the prediction of the report quantity for the second resource for time instances is based on the channel measurement for the first resource, and wherein an earliest time instance of the time instances is after a reference time corresponding to a latest resource of the first resources by the time gap.

[0012] The above and other aspects, features, and advantages of the disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0013] FIG. 1 illustrates an overall structure of an example wireless communication network according to various embodiments of the disclosure;

[0014] FIG. 2A illustrates a transmission path and a reception path in a wireless communication network according to various embodiments of the disclosure;

[0015] FIG. 2B illustrates a transmission path and a reception path in a wireless communication network according to various embodiments of the disclosure;

[0016] FIG. 3A illustrates structures of a user equipment (UE) and a base station in a wireless communication network according to various embodiments of the disclosure;

[0017] FIG. 3B illustrates structures of a UE and a base station in a wireless communication network according to various embodiments of the disclosure;

[0018] FIG. 4A illustrates a method performed by a UE according to various embodiments of the disclosure;

[0019] FIG. 4B illustrates a method performed by a UE according to various embodiments of the disclosure;

[0020] FIG. 4C illustrates a method performed by a UE according to various embodiments of the disclosure;

[0021] FIG. 5A illustrates a method performed by a base station according to various embodiments of the disclosure;

[0022] FIG. 5B illustrates a method performed by a base station according to various embodiments of the disclosure;

[0023] FIG. 5C illustrates a method performed by a base station according to various embodiments of the disclosure;

[0024] FIG. 6 illustrates a structure of a user equipment according to various embodiments of the disclosure;

[0025] FIG. 7 illustrates a structure of a base station according to various embodiments of the disclosure;

[0026] FIG. 8 is a block diagram of a terminal or UE according to an embodiment of the disclosure;

[0027] FIG. 9 is a block diagram of a base station (BS) according to an embodiment of the disclosure; and

[0028] FIG. 10 is a block diagram of a network entity according to an embodiment of the disclosure.

[0029] Hereinafter, embodiments of the disclosure will be described in detail with reference to the accompanying drawings.

[0030] In describing the embodiments, descriptions related to technical contents well-known in the art and not associated directly with the disclosure will be omitted. Such an omission of unnecessary descriptions is intended to prevent obscuring of the main idea of the disclosure and more clearly transfer the main idea.

[0031] For the same reason, in the accompanying drawings, some elements may be exaggerated, omitted, or schematically illustrated. Further, the size of each element does not completely reflect the actual size. In the drawings, identical or corresponding elements are provided with identical reference numerals or different reference numerals.

[0032] The advantages and features of the disclosure and ways to achieve them will be apparent by making reference to embodiments as described below in detail in conjunction with the accompanying drawings. However, the disclosure is not limited to the embodiments set forth below, but may be implemented in various different forms. The following embodiments are provided only to completely disclose the disclosure and inform those skilled in the art of the scope of the disclosure, and the disclosure is defined only by the scope of the appended claims. Throughout the specification, the same or like reference numerals designate the same or like elements. Furthermore, in describing the disclosure, a detailed description of known functions or constitution incorporated herein will be omitted in the case that it is determined that the description may make the subject matter of the disclosure unnecessarily unclear. The terms which will be described below are terms defined in consideration of the functions in the disclosure, and may be different according to users, intentions of the operators, or customs. Therefore, the definitions of the terms should be made based on the contents throughout the specification.

[0033] Herein, it will be understood that each block of the flowchart illustrations, and combinations of blocks in the flowchart illustrations, may be performed based on computer program instructions. These computer program instructions may be loaded collectively onto at least one processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which perform through any one of, or in any combination of, the at least one processor of the computer or other programmable data processing apparatus, create means for performing the functions specified in the flowchart block(s). These computer program instructions may also be stored in a non-transitory computer usable or computer-readable memory that may 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 that perform the function specified in the flowchart block(s). The computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable data processing apparatus to produce a computer executed process such that the instructions that perform on the computer or other programmable data processing apparatus provide steps for executing the functions specified in the flowchart block(s).

[0034] Further, each block may represent a module, segment, or portion of code, which includes one or more executable instructions for executing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks may occur out of the order. For example, two blocks(or functions) shown in succession may in fact be performed substantially concurrently or the blocks may sometimes be performed in the reverse order, depending upon the functionality involved.

[0035] As used in embodiments of the disclosure, a "~unit" may refer to a software element or a hardware element, such as a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC), which performs a predetermined function. However, the term including the word "~unit" does not always have a meaning limited to software or hardware. The "~unit" may be constructed either to be stored in an addressable storage medium or to execute one or more processors. Therefore, the "~unit" includes, for example, software elements, object-oriented software elements, components such as class elements and task elements, processes, functions, properties, procedures, sub-routines, segments of a program code, drivers, firmware, micro-codes, circuits, data, database, data structures, tables, arrays, and parameters. The components and functions provided by the "~unit" may be either combined into a smaller number of components and a "~unit," or divided into additional components and a "~unit." Moreover, the components and "~units" may be implemented to reproduce one or more central processing units (CPUs) within a device or a security multimedia card. Further, in the embodiments, the "~unit" may include one or more processors.

[0036] It should be appreciated that the blocks in each flowchart and combinations of the flowcharts may be performed by one or more computer programs which include instructions. The entirety of the one or more computer programs may be stored in a single memory device or the one or more computer programs may be divided with different portions stored in different multiple memory devices.

[0037] Any of the functions or operations described herein can be processed by one processor or a combination of processors. The one processor or the combination of processors is circuitry performing processing and includes circuitry like an application processor (AP, e.g. a CPU), a communication processor (CP, e.g., a modem), a graphics processing unit (GPU), a neural processing unit (NPU) (e.g., an artificial intelligence (AI) chip), a Wi-Fi chip, a Bluetooth® chip, a global positioning system (GPS) chip, a near field communication (NFC) chip, connectivity chips, a sensor controller, a touch controller, a finger-print sensor controller, a display driver integrated circuit (IC), an audio CODEC chip, a universal serial bus (USB) controller, a camera controller, an image processing IC, a microprocessor unit (MPU), a system on chip (SoC), an IC, or the like.

[0038] It will be appreciated that various embodiments of the disclosure according to the claims and description in the specification can be realized in the form of hardware, software or a combination of hardware and software.

[0039] Any such software may be stored in non-transitory computer readable storage media. The non-transitory computer readable storage media store one or more computer programs (software modules), the one or more computer programs include computer-executable instructions that, when executed by one or more processors of an electronic device individually or collectively, cause the electronic device to perform a method of the disclosure.

[0040] Any such software may be stored in the form of volatile or non-volatile storage such as, for example, a storage device like read only memory (ROM), whether erasable or rewritable or not, or in the form of memory such as, for example, random access memory (RAM), memory chips, device or integrated circuits or on an optically or magnetically readable medium such as, for example, a compact disk (CD), digital versatile disc (DVD), magnetic disk or magnetic tape or the like. It will be appreciated that the storage devices and storage media are various embodiments of non-transitory machine-readable storage that are suitable for storing a computer program or computer programs comprising instructions that, when executed, implement various embodiments of the disclosure. Accordingly, various embodiments of the present disclosure may provide a program comprising code for implementing apparatus or a method as claimed in any one of the claims of this specification and a non-transitory machine-readable storage storing such a program.

[0041] Hereinafter, the determination of priority between A and B in the present disclosure may refer to various actions such as selecting the one having a higher priority based on a predefined priority rule and performing an operation corresponding thereto, or omitting or dropping an operation corresponding to the one having a lower priority.

[0042] Hereinafter, "A or B" as described in the present disclosure may be understood as "A and / or B," which may include A, or B, or both A and B.

[0043] In addition, "at least one of A, B, and C" as described in the present disclosure may be understood to include A, or B, or C, or any combination of A, B, and C.

[0044] In addition, "at least one of A, B, or C" as described in the present disclosure may be understood to include A, or B, or C, or any combination of A, B, and C.

[0045] Furthermore, "A / B" as described in the present disclosure may be understood as "A and / or B," which may include A, or B, or both A and B.

[0046] Furthermore, "A, B" as described in the present disclosure may be understood as "A and / or B," which may include A, or B, or both A and B.

[0047] Furthermore, "A and B" as described in the present disclosure may be understood as "A and / or B," which may include A, or B, or both A and B.

[0048] Furthermore, "if condition A and condition B are satisfied," as described in the present disclosure, may not be limited to a case where both condition A and condition B are satisfied, but may be understood to include a case where either condition A or condition B is individually satisfied, both condition A and condition B are satisfied, or one or more additional conditions are satisfied in combination.

[0049] Furthermore, throughout this disclosure, ordinal terms such as "first," "second," "third," etc., (and similar qualifiers) are used merely to distinguish between different instances, occurrences, configurations, messages, stages, or aspects of elements, operations, or information as described herein. Unless the context clearly dictates otherwise, the use of such ordinal terms does not itself require that the elements, operations, or information distinguished by these terms be structurally different, numerically distinct, or substantively dissimilar. For example, a "first signal" and a "second signal" may refer to instances of the same signal transmitted at different times or containing the same core information despite minor variations, or they may refer to signals with different content or characteristics, depending on the specific context. Similarly, a "first value" and a "second value" may represent the same magnitude but measured or applied in different circumstances, or they may represent different magnitudes. The interpretation should be guided by the specific technical context, function, and relationship described in the relevant portion of the specification and claims.

[0050] Furthermore, the terms "first ~", "second ~", etc., as described in the present disclosure with respect to various elements (e.g., information, objects, operation, sequences, or the like), should not limit those elements. These terms may only be intended to distinguish one element from another, and may not be intended to indicate a specific order. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element.

[0051] Furthermore, even if "first ~" and "second ~" are described in the present disclosure, it may be understood that element(s) referred to by "first ~" and "second ~" may be the same or different. For example, in case of element(s) being information, first information and second information may both be same information and, in some cases, are separate and different information.

[0052] In addition, the terms "if ~" and "in case that ~" as used in the disclosure or claims may be interpreted to include the meanings of "when (or upon) ~," "in response to ~," "based on ~," or "according to ~," and may be used interchangeably with these expressions. In addition, expressions other than those exemplified herein may also be used, as long as they have substantially the same meaning and do not impair the technical features of the present disclosure.

[0053] For example, the physical layer signaling may be referred to as Layer 1 (L1) signaling and may include downlink control information (DCI). In addition, the higher layer signaling may include a medium access control (MAC) control message, a radio resource control (RRC) signaling message, a non-access stratum (NAS) signaling message, or an application layer message. The RRC signaling message may be referred to as L3 (layer 3) signaling. It should be noted, however, that the higher layer signaling is not limited to the aforementioned examples.

[0054] In addition, the term "not perform" as used in the present disclosure or claims may, in context, be understood to mean that the corresponding step is omitted or skipped. Such a term may be replaced with other terms having the same or substantially equivalent meaning.

[0055] In addition, "transmitting a message including A and B" as described in the present disclosure, may be understood as encompassing both (i) transmitting A and B in a single message, and (ii) transmitting A and B separately via multiple messages (e.g., transmitting a first message including A and a second message including B). This interpretation may also apply to messages that include two or more items (e.g., A, B, C), transmitted either together or separately.

[0056] In addition, "transmitting a message including A and transmitting a message including B" may also be interpreted as transmitting a message including A and B in a single message.

[0057] In the specific embodiments of the present disclosure described below, terms or components included in the disclosure may be expressed in singular or plural form depending on the specific embodiments presented. However, such singular or plural expressions are selected appropriately for convenience of description, and the present disclosure is not limited to a singular or plural number of components. A component expressed in the plural form may be implemented as a single component, and a component expressed in the singular form may be implemented as multiple components.

[0058] The drawings or flowcharts described below illustrate exemplary methods that may be implemented according to the principles of the present disclosure, and various modifications may be made to the methods illustrated in the flowcharts of the present disclosure. For example, although illustrated as a series of steps, various steps in each drawing or flowchart may overlap, occur in parallel, occur in a different order, or be repeated. In other examples, any step may be omitted or replaced with another step.

[0059] The methods and apparatuses proposed in the embodiments of the present disclosure are not limited to each embodiment individually, but may also be applied in combination of all or some of the embodiments proposed in the disclosure. Therefore, the embodiments of the present disclosure may be modified and applied without significantly departing from the scope of the present disclosure, as would be understood by those skilled in the art.

[0060] In this case, even if certain wordings are described differently across embodiments, they may be used interchangeably or in substitution or in combination if their underlying concepts are equivalent. For example, for the same or equivalent concept, even if one embodiment uses the expression "A" and another embodiment uses the expression "B", such expressions may be understood interchangeably, in substitution, or in combination.

[0061] The terms used in the following description to refer to access nodes, network entities, messages, interfaces between network entities, various types of identification information, and the like, are provided merely for the convenience of explanation by way of example. Therefore, the present disclosure is not limited to the terms described below, and other terms having equivalent technical meanings may also be used. Such terms may also be interchangeable with terms defined in any 3rd generation partnership project　(3GPP) technical specifications (TS) where appropriate.

[0062] Hereinafter, a base station is an entity that allocates resources to terminals, and may be at least one of a gNode B, an eNode B, a Node B, a base station (BS), a wireless access unit, a BS controller, or a node on a network.

[0063] Furthermore, the base station of the present disclosure may include a split architecture comprising a central unit (CU) and a distributed unit (DU). In this structure, the CU is configured to process the higher layers of the control and user planes, while the DU is configured to process lower-layer radio resource functions. The embodiments of the present disclosure may be equally applicable to 5G base station architectures in which such CU and DU functional splits are implemented.

[0064] A terminal may include a UE, a mobile station (MS), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing communication functions.

[0065] In the disclosure, a downlink (DL) refers to a radio link through which a BS transmits a signal to a UE, and an uplink (UL) refers to a radio link through which a UE transmits a signal to a BS.

[0066] Furthermore, hereinafter, 5th generation (5G) mobile communication technologies (e.g., 5G new radio (NR)), 6th generation (6G) mobile communication technologies may be described by way of example, but the embodiments of the present disclosure may also be applied to other communication systems having similar technical backgrounds or channel types. For example, newly evolved mobile communication systems developed after 5G and 6G may be included. Furthermore, based on determinations by those skilled in the art, the embodiments of the present disclosure may also be applied to other communication systems (e.g., Wi-Fi systems) through some modifications without significantly departing from the scope of the present disclosure

[0067] In the following description, the terms physical channel and signal may be used interchangeably with data or control signal. For example, the term physical downlink shared channel (PDSCH) refers to a physical channel through which data is transmitted, but the term PDSCH may also be used to refer to the data itself. That is, in the present disclosure, the expression "transmit a physical channel" may be interpreted as being equivalent to the expression "transmit data or a signal via a physical channel."

[0068] Hereinafter, in the context of the present disclosure, higher layer signaling may refer to signaling corresponding to at least one or any combination of the following: master information block (MIB), system information block (SIB) or SIB M (M = 1, 2, ...), radio resource control (RRC), or medium access control (MAC) control element (CE), or a non-access stratum (NAS) signaling message, or an application layer message. The RRC signaling message may be referred to as L3 (layer 3) signaling.

[0069] In addition, L1 signaling may refer to signaling corresponding to at least one or any combination of signaling techniques using the at least one or any combination of the following physical layer channels or signaling: physical downlink control channel (PDCCH), downlink control information (DCI), user equipment (UE)-specific DCI, group-common DCI, common DCI, scheduling DCI (e.g., DCI used for scheduling downlink or uplink data), non-scheduling DCI (e.g., DCI not used for scheduling downlink or uplink data) physical uplink control channel (PUCCH), or uplink control information (UCI). The L1 signaling message may be referred to as a physical layer signaling.

[0070] Hereinafter, the expression that information is configured by the BS, as used in the present disclosure or claims, may, in context, be understood to mean that the terminal receives the corresponding information from the BS via a physical layer signaling or a higher layer signaling. Such an expression may be replaced with other terms having the same or substantially equivalent meaning.

[0071] Hereinafter, the operational principle of the present disclosure will be described in detail with reference to the accompanying drawings.

[0072] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the disclosure as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

[0073] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the disclosure is provided for illustration purpose only and not for the purpose of limiting the disclosure as defined by the appended claims and their equivalents.

[0074] It is to be understood that the singular forms “a”, “an” 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 of such surfaces.

[0075] The term “include” or “may include” refers to the existence of a corresponding disclosed function, operation or component which can be used in various embodiments of the disclosure and does not limit one or more additional functions, operations, or components. The terms such as “include” and / or “have” may be construed to denote a certain characteristic, number, step, operation, constituent element, component or a combination thereof, but may not be construed to exclude the existence of or a possibility of addition of one or more other characteristics, numbers, steps, operations, constituent elements, components or combinations thereof.

[0076] The term “or” used in various embodiments of the disclosure includes any or all of combinations of listed words. For example, the expression “A or B” may include A, may include B, or may include both A and B.

[0077] Unless defined differently, all terms used herein, which include technical terminologies or scientific terminologies, have the same meaning as that understood by a person skilled in the art to which the disclosure belongs. Such terms as those defined in a generally used dictionary are to be interpreted to have the meanings equal to the contextual meanings in the relevant field of art, and are not to be interpreted to have ideal or excessively formal meanings unless clearly defined in the disclosure.

[0078] The various embodiments of the disclosure can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, broadband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system Frequency division duplex (FDD) systems, time division duplex (TDD) systems, universal mobile telecommunications systems (UMTS), global interoperability for microwave access (WiMAX) communication systems, fifth generation (5G) systems or new wireless (NR) systems, etc. In addition, the various embodiments of the disclosure can be applied to future oriented communication technologies.

[0079] In order to meet the increasing demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also called “Beyond 4G networks” or “Post-LTE systems”.

[0080] In order to achieve a higher data rate, 5G communication systems are implemented in higher frequency (millimeter, mmWave) bands, e.g., 60 GHz bands. In order to reduce propagation loss of radio waves and increase a transmission distance, technologies such as beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antenna, analog beamforming and large-scale antenna are discussed in 5G communication systems.

[0081] In addition, in 5G communication systems, developments of system network improvement are underway based on advanced small cell, cloud radio access network (RAN), ultra-dense network, device-to-device (D2D) communication, wireless backhaul, mobile network, cooperative communication, coordinated multi-points (CoMP), reception-end interference cancellation, etc.

[0082] In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition 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.

[0083] In order to enhance the scheduling efficiency of the wireless communication system, non-overlapping subband full duplexing (SBFD) may be applied so that multiple terminal devices may receive and transmit simultaneously in different frequency domain resources. However, in a scenario where the SBFD is applied, how to further enhance the transceiver performance of the terminal device is a problem that needs to be solved.

[0084] An aspect of the disclosure provides a method performed by a user equipment (UE) in a wireless communication system, the method includes receiving configuration information for subband non-overlapping full duplex SBFD, wherein the configuration information is for indicating an uplink subband and a downlink subband and time domain resources for the SBFD; if the UE is to receive a first resource for cross-link interference CLI measurement in the uplink subband on a first time domain resource and the UE is to receive a second resource in the downlink subband on a second time domain resource, and the first time domain resource and / or the second time domain resource are in the time domain resources for the SBFD, and a first condition is satisfied, performing at least one of the followings: a first operation, wherein the first operation includes receiving the first resource and / or cancelling reception of the second resource; a second operation, wherein the second operation includes receiving the second resource and / or cancelling reception of the first resource; a third operation, wherein the third operation includes receiving the first resource and receiving the second resource, wherein the first condition includes at least one of the followings: the first time domain resource and the second time domain resource are overlapped; a time domain interval between the first time domain resource and the second time domain resource is less than or equal to a threshold; a time unit included in the time domain interval between the first time domain resource and the second time domain resource is in the time domain resources for the SBFD.

[0085] In an example, if a second condition is satisfied, the UE performs the first operation or the second operation, wherein the second condition includes at least one of the followings: the UE reports first UE capability information, wherein the first UE capability information indicates that the UE does not support receiving the first resource in the uplink subband and the second resource in the downlink subband simultaneously in the time domain resources for the SBFD; the UE does not receive first indication information, wherein the first indication information indicates the UE to perform the third operation in the time domain resources for the SBFD.

[0086] In an example, if a third condition is satisfied, the UE performs the first operation, wherein the third condition includes at least one of the followings: the first resource is aperiodic and the second resource is a downlink channel triggered by a higher layer; the first resource is aperiodic and the second resource is semi-persistent and / or periodic.

[0087] In an example, if a fourth condition is satisfied, the UE performs the second operation, wherein the fourth condition includes at least one of the followings: the first resource is periodic / semi-persistent and the second resource is triggered by downlink control information DCI; the first resource is periodic / semi-persistent and the second resource is aperiodic.

[0088] In an example, if a fifth condition is satisfied, the UE performs the third operation, wherein the fifth condition includes at least one of the followings: the UE reports first UE capability information, wherein the first UE capability information indicates that the UE supports receiving the first resource in the uplink subband and the second resource in the downlink subband simultaneously in the time domain resources for the SBFD; the UE receives first indication information, wherein the first indication information indicates the UE to perform the third operation in the time domain resources for the SBFD.

[0089] In an example, when the UE performs the third operation, a quasi co-location QCL parameter of the first resource and a QCL parameter of the second resource are the same.

[0090] In an example, the first resource includes a resource for measuring a sounding reference signal SRS; and / or the second resource includes at least one of a downlink channel, a downlink signal, and a resource for the CLI measurement.

[0091] Another aspect of the disclosure provides a method performed by a user equipment (UE) in a wireless communication system, the method includes receiving configuration information for subband non-overlapping full duplex SBFD, wherein the configuration information indicates an uplink subband and a downlink subband and time domain resources for the SBFD; if the UE is to receive a first resource for the CLI measurement in the uplink subband on a first time domain resource, and the first time domain resource is in the time domain resources for the SBFD, performing a fourth operation, wherein the fourth operation includes: determining that a time domain unit associated with the first time domain resource is a downlink time domain unit.

[0092] In an example, when a sixth condition is satisfied, the UE performs the fourth operation, wherein the sixth condition includes at least one of the followings: the UE reports second UE capability information, wherein the second UE capability information indicates that the UE supports the time domain unit associated with the first time domain resource being determined as the downlink time domain unit; the UE receives second indication information, wherein the second indication information indicates the UE to determine that the time domain unit associated with the first time domain resource is the downlink time domain unit; the first resource is semi-persistent or periodic.

[0093] In an example, the method further includes the UE performing a fifth operation, wherein the fifth operation includes receiving the first resource on the first time domain resource, wherein the seventh condition includes at least one of the followings: the UE reports second UE capability information, wherein the second UE capability information indicates that the UE does not support the time domain unit associated with the first time domain resource to be determined as a downlink time domain unit; the UE receives second indication information, wherein the second indication information indicates the UE to determine the time domain unit associated with the first time domain resource as the time domain resources for the SBFD.

[0094] In an example, the time domain unit associated with the first time domain resource includes at least one of the followings: a symbol where the first time domain resource is located; a slot where the first time domain resource is located; Xsymsymbols before the first time domain resource, Xsym≥1; Ysymsymbols after the first time domain resource, Ysym≥ 1; Xslotslots before the first time domain resource, Xslot≥1; Yslotslots after the first time domain resource, Yslot≥1.

[0095] In an example, the method further includes receiving information for time division duplex TDD uplink and downlink configuration, wherein the downlink time domain unit includes downlink slots and / or downlink symbols indicated by the information for the TDD uplink and downlink configuration.

[0096] Another aspect of the disclosure provides a method performed by a User Equipment, UE, in a wireless communication system, the method includes receiving configuration information for subband non-overlapping full duplex SBFD, wherein the configuration information for the SBFD indicates an uplink subband and a downlink subband and time domain resources for the SBFD; if the UE is to transmit a third resource for cross-link interference CLI measurement in the downlink subband on a third time domain resource, and the UE is to transmit a fourth resource in the uplink subband on a fourth time domain resource, and the third time domain resource and / or the fourth time domain resource are in the time domain resources for the SBFD, and an eighth condition is satisfied, performing at least one of the followings: a sixth operation, wherein the sixth operation includes transmitting the third resource and / or cancelling transmission of the fourth resource; a seventh operation, wherein the seventh operation includes transmitting the fourth resource and / or cancelling transmission of the third resource; an eighth operation, wherein the eighth operation includes transmitting the third resource and transmitting the fourth resource, wherein the eighth condition includes at least one of the followings: the third time domain resource and the fourth time domain resource are overlapped; a time domain interval between the third time domain resource and the fourth time domain resource is less than or equal to a threshold; a time unit included in the time domain interval between the third time domain resource and the fourth time domain resource is in the time domain resources for the SBFD.

[0097] In an example, if a ninth condition is satisfied, the UE performs the sixth operation or the seventh operation, wherein the ninth condition includes at least one of the followings: the UE reports third UE capability information, wherein the third UE capability information indicates that the UE does not support transmitting the third resource in the downlink subband and the fourth resource in the uplink subband simultaneously in the time domain resources for the SBFD; the UE does not receive third indication information, wherein the third indication information indicates the UE to perform the eighth operation in the time domain resources for the SBFD.

[0098] In an example, if a tenth condition is satisfied, the UE performs the sixth operation, wherein the tenth condition includes at least one of the followings: the third resource is aperiodic and the fourth resource is an uplink channel triggered by a higher layer; the third resource is aperiodic and the fourth resource is semi-persistent and / or periodic.

[0099] In an example, if an eleventh condition is satisfied, the UE performs the seventh operation, wherein the eleventh condition includes at least one of the followings: the third resource is periodic / semi-persistent, and the fourth resource is triggered by downlink control information DCI; the third resource is periodic / semi-persistent, and the fourth resource is aperiodic.

[0100] In an example, if a twelfth condition is satisfied, the UE performs the eighth operation, wherein the twelfth condition includes at least one of the followings: the UE reports the third UE capability information, wherein the third UE capability information indicates that the UE supports transmitting the third resource in the downlink subband and the fourth resource in the uplink subband simultaneously in the time domain resources for the SBFD; the UE receives the third indication information, wherein the third indication information indicates the UE to perform the eighth operation in the time domain resources for the SBFD.

[0101] In an example, when the UE performs the eighth operation, the quasi co-location QCL parameter of the third resource and the QCL parameter of the fourth resource are the same.

[0102] In an example, the third resource includes a resource for measuring a sounding reference signal SRS; and / or the fourth resource includes at least one of an uplink channel, an uplink signal, a resource for the CLI measurement.

[0103] Another aspect of the disclosure provides a method performed by a base station in a wireless communication system, the method includes transmitting configuration information for subband non-overlapping full duplex SBFD, wherein the configuration information for the SBFD indicates an uplink subband and a downlink subband and time domain resources for the SBFD; transmitting indication information indicating a first time domain resource, a second time domain resource, a first resource for cross-link interference CLI measurement in the uplink subband, and a second resource in the downlink subband; and transmitting the second resource on the second time domain resource; wherein if the first resource is to be received by a user equipment on the first time domain resource and the second resource is to be received by the user equipment on the second time domain resource, and the first time domain resource and / or the second time domain resource are in the time domain resources for the SBFD, and a first condition is satisfied, at least one of the followings is performed by the user equipment: a first operation, wherein the first operation includes the first resource being received and / or reception of the second resource being cancelled; a second operation, wherein the second operation includes the second resource being received and / or reception of the first resource being cancelled; a third operation, wherein the third operation includes the first resource being received and the second resource being received, wherein the first condition includes at least one of the followings: the first time domain resource and the second time domain resource are overlapped; a time domain interval between the first time domain resource and the second time domain resource is less than or equal to a threshold; a time unit included in the time domain interval between the first time domain resource and the second time domain resource is in the time domain resources for the SBFD.

[0104] In an example, if a second condition is satisfied, the first operation or the second operation is performed by the UE, wherein the second condition includes at least one of the followings: the UE reports first UE capability information, wherein the first UE capability information indicates that the UE does not support receiving the first resource in the uplink subband and the second resource in the downlink subband simultaneously in the time domain resources for the SBFD; the UE does not receive first indication information, wherein the first indication information indicates the UE to perform the third operation in the time domain resources for the SBFD.

[0105] In an example, if a third condition is satisfied, the first operation is performed by the UE, wherein the third condition includes at least one of the followings: the first resource is aperiodic and the second resource is a downlink channel triggered by a higher layer; the first resource is aperiodic and the second resource is semi-persistent and / or periodic.

[0106] In an example, if a fourth condition is satisfied, the second operation is performed by the UE, wherein the fourth condition includes at least one of the followings: the first resource is periodic / semi-persistent and the second resource is triggered by downlink control information DCI; the first resource is periodic / semi-persistent and the second resource is aperiodic.

[0107] In an example, if a fifth condition is satisfied, the third operation is performed by the UE, wherein the fifth condition includes at least one of the followings: the UE reports first UE capability information, wherein the first UE capability information indicates that the UE supports receiving the first resource in the uplink subband and the second resource in the downlink subband simultaneously in the time domain resources for the SBFD; the UE receives first indication information, wherein the first indication information indicates the UE to perform the third operation in the time domain resources for the SBFD.

[0108] In an example, when the third operation is performed by the UE, a quasi co-location QCL parameter of the first resource and a QCL parameter of the second resource are the same.

[0109] In an example, the first resource includes a resource for measuring a sounding reference signal SRS; and / or the second resource includes at least one of a downlink channel, a downlink signal, and a resource for the CLI measurement.

[0110] Another aspect of the disclosure provides a method performed by a base station in a wireless communication system, the method includes transmitting configuration information for subband non-overlapping full duplex SBFD, wherein the configuration information for the SBFD indicates an uplink subband and a downlink subband and time domain resources for the SBFD; transmitting indication information indicating a first time domain resource and a first resource for cross-link interference CLI measurement in the uplink subband; and if the first resource is to be received by the user equipment on the first time domain resource, and the first time domain resource is in the time domain resources for the SBFD, determining that a time domain unit associated with the first time domain resource is a downlink time domain unit.

[0111] In an example, when a sixth condition is satisfied, the base station determines that the time domain unit associated with the first time domain resource is a downlink time domain unit, wherein the sixth condition includes at least one of the followings: the UE reports second UE capability information, wherein the second UE capability information indicates that the UE supports the time domain unit associated with the first time domain resource being determined as the downlink time domain unit; the UE receives second indication information, wherein the second indication information indicates the UE to determine that the time domain unit associated with the first time domain resource is the downlink time domain unit; the first resource is semi-persistent or periodic.

[0112] In an example, the time domain unit associated with the first time domain resource includes at least one of the followings: a symbol where the first time domain resource is located; a slot where the first time domain resource is located; Xsymsymbols before the first time domain resource, Xsym≥1; Ysymsymbols after the first time domain resource, Ysym≥ 1; Xslotslots before the first time domain resource, Xslot≥1; Yslotslots after the first time domain resource, Yslot≥1.

[0113] In an example, the method further includes: transmitting information for time division duplex TDD uplink and downlink configuration, wherein the downlink time domain unit includes downlink slots and / or downlink symbols indicated by the information for the TDD uplink and downlink configuration.

[0114] Another aspect of the disclosure provides a method performed by a base station in a wireless communication system, the method includes transmitting configuration information for subband non-overlapping full duplex SBFD, wherein the configuration information for the SBFD indicates an uplink subband and a downlink subband and time domain resources for the SBFD; transmitting indication information indicating a third time domain resource, a fourth time domain resource, a third resource for cross-link interference CLI measurement in the downlink subband and a fourth resource in the uplink subband; and receiving the fourth resource on the fourth time domain resource, wherein if the third resource is to be transmitted by a user equipment on the third time domain resource and the fourth resource is to be transmitted by the user equipment on the fourth time domain resource, and the third time domain resource and / or the fourth time domain resource are in the time domain resources for the SBFD, and an eighth condition is satisfied, at least one of the followings is performed by the user equipment: a sixth operation, wherein the sixth operation includes the third resource being transmitted and / or transmission of the fourth resource being canceled; a seventh operation, wherein the seventh operation includes the fourth resource being transmitted and / or transmission of the third resource being canceled; an eighth operation, wherein the eighth operation includes the third resource being transmitted and the fourth resource being transmitted, wherein the eighth condition includes at least one of the followings: the third time domain resource and the fourth time domain resource are overlapped; a time domain interval between the third time domain resource and the fourth time domain resource is less than or equal to a threshold; a time unit included in the time domain interval between the third time domain resource and the fourth time domain resource is in the time domain resources for the SBFD.

[0115] In an example, if a ninth condition is satisfied, the sixth operation or the seventh operation is performed by the UE, wherein the ninth condition includes at least one of the followings: the UE reports third UE capability information, wherein the third UE capability information indicates that the UE does not support transmitting the third resource in the downlink subband and the fourth resource in the uplink subband simultaneously in the time domain resources for the SBFD; the UE does not receive third indication information, wherein the third indication information indicates the UE to perform the eighth operation in the time domain resources for the SBFD.

[0116] In an example, if a tenth condition is satisfied, the sixth operation is performed by the UE, wherein the tenth condition includes at least one of the followings: the third resource is aperiodic and the fourth resource is an uplink channel triggered by a higher layer; the third resource is aperiodic and the fourth resource is semi-persistent and / or periodic.

[0117] In an example, if an eleventh condition is satisfied, the seventh operation is performed by the UE, wherein the eleventh condition includes at least one of the followings: the third resource is periodic / semi-persistent, and the fourth resource is triggered by downlink control information DCI; the third resource is periodic / semi-persistent, and the fourth resource is aperiodic.

[0118] In an example, if a twelfth condition is satisfied, the eighth operation is performed by the UE, wherein the twelfth condition includes at least one of the followings: the UE reports the third UE capability information, wherein the third UE capability information indicates that the UE supports transmitting the third resource in the downlink subband and the fourth resource in the uplink subband simultaneously in the time domain resources for the SBFD; the UE receives the third indication information, wherein the third indication information indicates the UE to perform the eighth operation in the time domain resources for the SBFD.

[0119] In an example, the third resource includes a resource for measuring a sounding reference signal SRS; and / or the fourth resource includes at least one of an uplink channel, an uplink signal, a resource for the CLI measurement.

[0120] Another aspect of the disclosure provides a user equipment including a transceiver; and a controller coupled with the transceiver and configured to perform the above methods which may be performed by the user equipment.

[0121] Yet another aspect of the disclosure provides a base station including a transceiver; and a controller coupled with the transceiver and configured to perform the above methods which may be performed by the controller.

[0122] Advantageous Effects of Invention

[0123] The method provided by the application improves the transceiver performance of the terminal device served by the base station performing SBFD operations, thereby improving the scheduling efficiency of the communication system.

[0124] FIG. 1 illustrates an example wireless networK100 according to various embodiments of the disclosure. The embodiment of the wireless networK100 shown in FIG. 1 is for illustration only. Other embodiments of the wireless networK100 can be used without departing from the scope of the disclosure.

[0125] The wireless networK100 includes a gNodeB (gNB) 101, a gNB 102, and a gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one Internet Protocol (IP) networK130, such as the Internet, a private IP network, or other data networks.

[0126] Depending on a type of the network, other well-known terms such as “base station” or “access point” can be used instead of “gNodeB” or “gNB”. For convenience, the terms “gNodeB” and “gNB” are used in this patent document to refer to network infrastructure components that provide wireless access for remote terminals. And, depending on the type of the network, other well-known terms such as “mobile station”, “user station”, “remote terminal”, “wireless terminal” or “user apparatus” can be used instead of “user equipment” or “UE”. For convenience, the terms “user equipment” and “UE” are used in this patent document to refer to remote wireless devices that wirelessly access the gNB, no matter whether the UE is a mobile device (such as a mobile phone or a smart phone) or a fixed device (such as a desktop computer or a vending machine).

[0127] gNB 102 provides wireless broadband access to the networK130 for a first plurality of User Equipments (UEs) within a coverage area 120 of gNB 102. The first plurality of UEs include a UE 111, which may be located in a Small Business (SB); a UE 112, which may be located in an enterprise (E); a UE 113, which may be located in a WiFi Hotspot (HS); a UE 114, which may be located in a first residence (R); a UE 115, which may be located in a second residence (R); a UE 116, which may be a mobile device (M), such as a cellular phone, a wireless laptop computer, a wireless PDA, etc. GNB 103 provides wireless broadband access to networK130 for a second plurality of UEs within a coverage area 125 of gNB 103. The second plurality of UEs include a UE 115 and a UE 116. In some embodiments, one or more of gNBs 101-103 can communicate with each other and with UEs 111-116 using 5G, Long Term Evolution (LTE), LTE-A, WiMAX or other advanced wireless communication technologies.

[0128] The dashed lines show approximate ranges of the coverage areas 120 and 125, and the ranges are shown as approximate circles merely for illustration and explanation purposes. It should be clearly understood that the coverage areas associated with the gNBs, such as the coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on configurations of the gNBs and changes in the radio environment associated with natural obstacles and man-made obstacles.

[0129] As will be described in more detail below, one or more of next generation node B (gNB) 101, gNB 102, and gNB 103 include a two dimensional (2D) antenna array as described in embodiments of the disclosure. In some embodiments, one or more of gNB 101, gNB 102, and gNB 103 support codebook designs and structures for systems with 2D antenna arrays.

[0130] Although FIG. 1 illustrates an example of the wireless networK100, various changes can be made to FIG. 1. The wireless networK100 can include any number of gNBs and any number of UEs in any suitable arrangement, for example. Furthermore, gNB 101 can directly communicate with any number of UEs and provide wireless broadband access to the networK130 for those UEs. Similarly, each gNB 102-103 can directly communicate with the networK130 and provide direct wireless broadband access to the networK130 for the UEs. In addition, gNB 101, 102 and / or 103 can provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0131] FIGs. 2A and 2B illustrate example wireless transmission and reception paths according to the disclosure. In the following description, the transmission path 200 can be described as being implemented in a gNB, such as gNB 102, and the reception path 250 can be described as being implemented in a UE, such as UE 116. However, it should be understood that the reception path 250 can be implemented in a gNB and the transmission path 200 can be implemented in a UE. In some embodiments, the reception path 250 is configured to support codebook designs and structures for systems with 2D antenna arrays as described in embodiments of the disclosure.

[0132] The transmission path 200 includes a channel coding and modulation blocK205, a Serial-to-Parallel (S-to-P) blocK210, a size N Inverse Fast Fourier Transform (IFFT) blocK215, a Parallel-to-Serial (P-to-S) blocK220, a cyclic prefix addition blocK225, and an up-converter (UC) 230. The reception path 250 includes a down-converter (DC) 255, a cyclic prefix removal blocK260, a Serial-to-Parallel (S-to-P) blocK265, a size N Fast Fourier Transform (FFT) blocK270, a Parallel-to-Serial (P-to-S) blocK275, and a channel decoding and demodulation blocK280.

[0133] In the transmission path 200, the channel coding and modulation blocK205 receives a set of information bits, applies coding (such as Low Density Parity Check (LDPC) coding), and modulates the input bits (such as using Quadrature Phase Shift Keying (QPSK) or Quadrature Amplitude Modulation (QAM)) to generate a sequence of frequency domain modulated symbols. The Serial-to-Parallel (S-to-P) blocK210 converts (such as demultiplexes) serial modulated symbols into parallel data to generate N parallel symbol streams, where N is a size of the IFFT / FFT used in gNB 102 and UE 116. The size N IFFT blocK215 performs IFFT operations on the N parallel symbol streams to generate a time domain output signal. The Parallel-to-Serial blocK220 converts (such as multiplexes) parallel time domain output symbols from the Size N IFFT blocK215 to generate a serial time domain signal. The cyclic prefix addition blocK225 inserts a cyclic prefix into the time domain signal. The up-converter 230 modulates (such as up-converts) the output of the cyclic prefix addition blocK225 to an RF frequency for transmission via a wireless channel. The signal can also be filtered at a baseband before switching to the RF frequency.

[0134] The RF signal transmitted from gNB 102 arrives at UE 116 after passing through the wireless channel, and operations in reverse to those at gNB 102 are performed at UE 116. The down-converter 255 down-converts the received signal to a baseband frequency, and the cyclic prefix removal blocK260 removes the cyclic prefix to generate a serial time domain baseband signal. The Serial-to-Parallel blocK265 converts the time domain baseband signal into a parallel time domain signal. The Size N FFT blocK270 performs an FFT algorithm to generate N parallel frequency domain signals. The Parallel-to-Serial blocK275 converts the parallel frequency domain signal into a sequence of modulated data symbols. The channel decoding and demodulation blocK280 demodulates and decodes the modulated symbols to recover the original input data stream.

[0135] Each of gNBs 101-103 may implement a transmission path 200 similar to that for transmitting to UEs 111-116 in the downlink, and may implement a reception path 250 similar to that for receiving from UEs 111-116 in the uplink. Similarly, each of UEs 111-116 may implement a transmission path 200 for transmitting to gNBs 101-103 in the uplink, and may implement a reception path 250 for receiving from gNBs 101-103 in the downlink.

[0136] Each of the components in FIGs. 2a and 2b can be implemented using only hardware, or using a combination of hardware and software / firmware. As a specific example, at least some of the components in FIGs. 2a and 2b may be implemented in software, while other components may be implemented in configurable hardware or a combination of software and configurable hardware. For example, the FFT blocK270 and IFFT blocK215 may be implemented as configurable software algorithms, in which the value of the size N may be modified according to the implementation.

[0137] Furthermore, although described as using FFT and IFFT, this is only illustrative and should not be interpreted as limiting the scope of the disclosure. Other types of transforms can be used, such as Discrete Fourier transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions. It should be understood that for DFT and IDFT functions, the value of variable N may be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N may be any integer which is a power of 2 (such as 1, 2, 4, 8, 16, etc.)

[0138] Although FIGs. 2A and 2B illustrate examples of wireless transmission and reception paths, various changes may be made to FIGs. 2A and 2B. For example, various components in FIGs. 2A and 2B can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. Furthermore, FIGs. 2A and 2B are intended to illustrate examples of types of transmission and reception paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communication in a wireless network.

[0139] FIG. 3A illustrates an example UE 116 according to the disclosure. The embodiment of UE 116 shown in FIG. 3A is for illustration only, and UEs 111-115 of FIG. 1 can have the same or similar configuration. However, a UE has various configurations, and FIG. 3A does not limit the scope of the disclosure to any specific implementation of the UE.

[0140] UE 116 includes an antenna 301, a radio frequency (RF) transceiver 302, a transmission (TX) processing circuit 303, a microphone 304, and a reception (RX) processing circuit 305. UE 116 also includes a speaker 306, a controller / processor 307, an input / output (I / O) interface 308, an input device(s) 309, a display 310, and a memory 311. The memory 311 includes an operating system (OS) 312 and one or more applications 313.

[0141] The RF transceiver 302 receives an incoming RF signal transmitted by a gNB of the wireless networK100 from the antenna 301. The RF transceiver 302 down-converts the incoming RF signal to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is transmitted to the RX processing circuit 305, where the RX processing circuit 305 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. The RX processing circuit 305 transmits the processed baseband signal to speaker 306 (such as for voice data) or to controller / processor 307 for further processing (such as for web browsing data).

[0142] The TX processing circuit 303 receives analog or digital voice data from microphone 304 or other outgoing baseband data (such as network data, email or interactive video game data) from controller / processor 307. The TX processing circuit 303 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 302 receives the outgoing processed baseband or IF signal from the TX processing circuit 303 and up-converts the baseband or IF signal into an RF signal transmitted via the antenna 301.

[0143] The controller / processor 307 can include one or more processors or other processing devices and execute an OS 312 stored in the memory 311 in order to control the overall operation of UE 116. For example, the controller / processor 307 can control the reception of forward channel signals and the transmission of backward channel signals through the RF transceiver 302, the RX processing circuit 305 and the TX processing circuit 303 according to well-known principles. In some embodiments, the controller / processor 307 includes at least one microprocessor microcontroller.

[0144] The controller / processor 307 is also capable of executing other processes and programs residing in the memory 311, such as operations for channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the disclosure. The controller / processor 307 can move data into or out of the memory 311 as required by an execution process. In some embodiments, the controller / processor 307 is configured to execute the application 313 based on the OS 312 or in response to signals received from the gNB or the operator. The controller / processor 307 is also coupled to an I / O interface 308, where the I / O interface 308 provides UE 116 with the ability to connect to other devices such as laptop computers and handheld computers. I / O interface 308 is a communication path between these accessories and the controller / processor 307.

[0145] The controller / processor 307 is also coupled to the input device(s) 309 and the display 310. An operator of UE 116 can input data into UE 116 using the input device(s) 309. The display 310 may be a liquid crystal display or other display capable of presenting text and / or at least limited graphics (such as from a website). The memory 311 is coupled to the controller / processor 307. A part of the memory 311 can include a random access memory (RAM), while another part of the memory 311 can include a flash memory or other read-only memory (ROM).

[0146] Although FIG. 3A illustrates an example of UE 116, various changes can be made to FIG. 3A. For example, various components in FIG. 3a can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. As a specific example, the controller / processor 307 can be divided into a plurality of processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Furthermore, although FIG. 3A illustrates that the UE 116 is configured as a mobile phone or a smart phone, UEs can be configured to operate as other types of mobile or fixed devices.

[0147] FIG. 3B illustrates an example gNB 102 according to the disclosure. The embodiment of gNB 102 shown in FIG. 3B is for illustration only, and other gNBs of FIG. 1 can have the same or similar configuration. However, a gNB has various configurations, and FIG. 3B does not limit the scope of the disclosure to any specific implementation of a gNB. It should be noted that gNB 101 and gNB 103 can include the same or similar structures as gNB 102.

[0148] As shown in FIG. 3B, gNB 102 includes a plurality of antennas 370a-370n, a plurality of RF transceivers 372a-372n, a transmission (TX) processing circuit 374, and a reception (RX) processing circuit 376. In certain embodiments, one or more of the plurality of antennas 370a-370n include a 2D antenna array. gNB 102 also includes a controller / processor 378, a memory 380, and a backhaul or network interface 382.

[0149] RF transceivers 372a-372n receive an incoming RF signal from antennas 370a-370n, such as a signal transmitted by UEs or other gNBs. RF transceivers 372a-372n down-convert the incoming RF signal to generate an IF or baseband signal. The IF or baseband signal is transmitted to the RX processing circuit 376, where the RX processing circuit 376 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. RX processing circuit 376 transmits the processed baseband signal to controller / processor 378 for further processing.

[0150] The TX processing circuit 374 receives analog or digital data (such as voice data, network data, email or interactive video game data) from the controller / processor 378. TX processing circuit 374 encodes, multiplexes and / or digitizes outgoing baseband data to generate a processed baseband or IF signal. RF transceivers 372a-372n receive the outgoing processed baseband or IF signal from TX processing circuit 374 and up-convert the baseband or IF signal into an RF signal transmitted via antennas 370a-370n.

[0151] The controller / processor 378 can include one or more processors or other processing devices that control the overall operation of gNB 102. For example, the controller / processor 378 can control the reception of forward channel signals and the transmission of backward channel signals through the RF transceivers 372a-372n, the RX processing circuit 376 and the TX processing circuit 374 according to well-known principles. The controller / processor 378 can also support additional functions, such as higher layer wireless communication functions. For example, the controller / processor 378 can perform a Blind Interference Sensing (BIS) process such as that performed through a BIS algorithm, and decode a received signal from which an interference signal is subtracted. A controller / processor 378 may support any of a variety of other functions in gNB 102. In some embodiments, the controller / processor 378 includes at least one microprocessor microcontroller.

[0152] The controller / processor 378 is also capable of executing programs and other processes residing in the memory 380, such as a basic OS. The controller / processor 378 can also support channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the disclosure. In some embodiments, the controller / processor 378 supports communication between entities such as web RTCs. The controller / processor 378 can move data into or out of the memory 380 as required by an execution process.

[0153] The controller / processor 378 is also coupled to the backhaul or network interface 382. The backhaul or network interface 382 allows gNB 102 to communicate with other devices or systems through a backhaul connection or through a network. The backhaul or network interface 382 can support communication over any suitable wired or wireless connection(s). For example, when gNB 102 is implemented as a part of a cellular communication system, such as a cellular communication system supporting 5G or new radio access technology or new radio (NR), LTE or LTE-A, the backhaul or network interface 382 can allow gNB 102 to communicate with other gNBs through wired or wireless backhaul connections. When gNB 102 is implemented as an access point, the backhaul or network interface 382 can allow gNB 102 to communicate with a larger network, such as the Internet, through a wired or wireless local area network or through a wired or wireless connection. The backhaul or network interface 382 includes any suitable structure that supports communication through a wired or wireless connection, such as an Ethernet or an RF transceiver.

[0154] The memory 380 is coupled to the controller / processor 378. A part of the memory 380 can include an RAM, while another part of the memory 380 can include a flash memory or other ROMs. In certain embodiments, a plurality of instructions, such as the BIS algorithm, are stored in the memory. The plurality of instructions are configured to cause the controller / processor 378 to execute the BIS process and decode the received signal after subtracting at least one interference signal determined by the BIS algorithm.

[0155] As will be described in more detail below, the transmission and reception paths of gNB 102 (implemented using RF transceivers 372a-372n, TX processing circuit 374 and / or RX processing circuit 376) support aggregated communication with FDD cells and TDD cells.

[0156] Although FIG. 3B illustrates an example of gNB 102, various changes may be made to FIG. 3B. For example, gNB 102 can include any number of each component shown in FIG. 3A. As a specific example, the access point can include many backhaul or network interfaces 382, and the controller / processor 378 can support routing functions to route data between different network addresses. As another specific example, although shown as including a single instance of the TX processing circuit 374 and a single instance of the RX processing circuit 376, gNB 102 can include multiple instances of each (such as one for each RF transceiver).

[0157] In the disclosure, the term “channel state information (CSI)” may be used interchangeably with the terms “CSI parameter” or “CSI quantity”.

[0158] In the disclosure, CSI may include at least one of the followings: CSI reference signal (CSI-RS) resource indicator (CRI), rank indicator (RI), precoding matrix indicator (PMI), channel quality indicator (CQI), layer indicator (LI), synchronization signal (SS) / physical broadcast channel (PBCH) block resource indicator (SSBRI), layer 1-reference signal received power (L1-RSRP), layer 1-single to interference noise ratio (L1-SINR), CapabilityIndex.

[0159] In the disclosure, the term “CSI reporting configuration” may be used interchangeably with the terms “CSI reporting configuration information” or “information for CSI reporting configuration” or “information for configuring CSI report”.

[0160] In the disclosure, the CSI may be the CSI reported by the UE in a report, or in a report instance.

[0161] In the disclosure, the term “reference signal” may be used interchangeably with the term “reference signal resource”.

[0162] In the disclosure, the reference signal may include at least one of the followings: a reference signal for synchronization, a reference signal for demodulation (e.g., a demodulation reference signal (DM-RS), a reference signal for obtaining of the channel state, a reference signal for phase tracking, a reference signal for mobility, a reference signal for positioning, a reference signal for channel measurement, a reference signal for interference measurement, a reference signal for sounding. Optionally, the reference signal for synchronization includes at least one of the followings: a primary synchronization signal, a secondary synchronization signal. Optionally, the reference signal for synchronization may include a synchronization signal / physical broadcast channel block (SS / PBCH block, SSB). Optionally, the reference signal for demodulation may include at least one of the followings: a reference signal for data channel demodulation and a reference signal for control channel demodulation. Optionally, the data channel may include at least one of the followings: a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH). Optionally, the control channel may include at least one of the followings: a physical downlink control channel (PDCCH) and a physical uplink control channel (PUCCH). Optionally, the reference signal for obtaining of the channel state may include at least one of the followings: a reference signal for tracking, a reference signal for CSI acquisition, and a reference signal for beam management. Optionally, the reference signal for beam management includes at least one of the followings: a reference signal for obtaining L1-RSRP, a reference signal for obtaining L1-SINR. Optionally, obtaining L1-RSRP may be computing L1-RSRP. Optionally, obtaining L1-SINR may be computing L1-SINR. In the disclosure, the “reference signal for sounding” may be referred as a sounding reference signal (SRS).

[0163] In the disclosure, the term “beam” may include at least one of the followings: “quasi co-location (QCL) parameter”, “transmission configuration indication (TCI) state”, “spatial domain filter”, “antenna port”, “transmission and reception point (TRP)”, “reference signal”, “beam information”, “beam index”. Optionally, a beam and another beam being the same may be a beam and another beam being quasi co-located.

[0164] In the disclosure, an antenna port can be defined such that the channel over which a symbol on the antenna port is conveyed can be inferred from the channel over which another symbol on the same antenna port is conveyed.

[0165] In the disclosure, two antenna ports are said to be quasi co-located if the large-scale properties of the channel over which a symbol on one antenna port is conveyed can be inferred from the channel over which a symbol on the other antenna port is conveyed. Optionally, the large-scale properties include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters.

[0166] In the disclosure, the term “QCL parameter” may be used interchangeably with the terms “QCL information”, “QCL assumption”, “QCL configuration”, “QCL configuration and / or QCL type”. Optionally, the QCL parameter may include / represent at least one of the followings: Doppler shift, Doppler spread, average delay, delay spread, spatial reception parameter. The spatial reception parameter may be a parameter for spatial reception. Optionally, the QCL parameter may include a combination of different types of parameters. For example, the QCL parameter may include Doppler shift, Doppler spread, average delay and delay spread, and such QCL parameter may be referred as QCL parameter type A. For example, the QCL parameter may include Doppler shift and Doppler spread, and such QCL parameter may be referred as QCL parameter type B. For example, the QCL parameter may include Doppler shift and average delay, and such QCL parameter may be referred as QCL parameter type C. For example, the QCL parameter may include spatial reception parameter, and such QCL parameter may be referred as QCL parameter type D. For example, two antenna ports are said to be quasi co-located if the large-scale properties of the channel over which a symbol on one antenna port is conveyed can be inferred from the channel over which a symbol on the other antenna port is conveyed. Optionally, the large-scale properties include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters. For example, two antenna ports are said to be quasi co-located subject to QCL parameter type D if spatial Rx parameters of the channel over which a symbol on one antenna port is conveyed can be inferred from the channel over which a symbol on the other antenna port is conveyed.

[0167] In the disclosure, the term “TCI state” may be used interchangeably with the terms “TCI state configuration” or “TCI state configuration information” or “information for configuring the TCI state” or “information for indicating the TCI state”. Optionally, the TCI state may be a unified TCI state. Optionally, the TCI state may be at least one of an uplink TCI state (UL TCI state), a downlink TCI state (DL TCI state), a joint TCI state. Optionally, the unified TCI state may be an uplink TCI state (UL TCI state) and a downlink TCI state (DL TCI state), or a joint TCI state.

[0168] Optionally, a TCI state may include parameters configuring quasi co-location relation, these parameters configure the relation between the reference signal (e.g., one or two reference signals, or one or two downlink reference signals) and at least one of the followings: a demodulation reference signal (DM-RS) port of the PDSCH, a DM-RS port of the PDCCH, a CSI-RS port of a CSI-RS resource. Optionally, a quasi co-location relation is configured by a higher layer parameter (e.g., qcl-Type1) for the first downlink reference signal. Optionally, a quasi co-location relation is configured by a higher layer parameter (e.g., qcl-Type2) for the second downlink reference signal. In case of two downlink reference signals, the QCL types are not the same, regardless of whether the references are to the same DL RS or different DL RSs.

[0169] In the disclosure, the term “spatial domain filter” may be used interchangeably with the terms “spatial filter” or “uplink transmission spatial domain filter” or “spatial domain filter for uplink transmission” or “spatial domain filter for downlink reception”.

[0170] In the disclosure, the term “transmission occasion of reference signal resource” may be used interchangeably with the term “occasion of reference signal resource” or “reception occasion of reference signal resource” or “transmission occasion of reference signal” or “occasion of reference signal” or “reception occasion of reference signal”.

[0171] In the disclosure, the term “UE capability” may be used interchangeably with the terms “UE feature” or “UE feature group” or “UE capability parameter” or “reported UE capability” or “UE capability signaling” or “reported UE capability parameter”.

[0172] In the disclosure, a time domain resource may include / correspond to several time domain units.

[0173] In the disclosure, a time domain unit may be one of: a frame, a subframe, a slot, a sub-slot, a symbol. Optionally, the sub-slot may be a subset of a slot in time domain. For example, symbols included in the sub-slot are a subset of symbols included in the slot. Optionally, in the disclosure, the time domain unit may be one of: a second, a millisecond, a microsecond, a nanosecond, and a sample.

[0174] In the disclosure, a frequency domain resource may include / correspond to several frequency domain units.

[0175] In the disclosure, a frequency domain unit may be at least one of a band, a subband, a component carrier (CC), a bandwidth part (BWP), a resource block, a resource block group (RBG), a subcarrier, a carrier, a frequency band, a frequency range, a cell, a serving cell. The resource block may be a physical resource block (PRB) or a common resource block (CRB). The frequency range may be frequency range 1, frequency range 2 (e.g., frequency range 2-1 and / or frequency range 2-2).

[0176] In the disclosure, a time-frequency unit may be one of a resource element (RE), a resource element group (REG). The resource element group may include one or more resource elements. For example, a resource element group may include 6 or 12 resource elements.

[0177] In the disclosure, the starting time domain position of a channel or signal or resource is an earlier position in time domain, and the ending time domain position of a channel or signal or resource is a later position in time domain.

[0178] In the disclosure, the starting frequency domain position of a channel or signal or resource is a lower position in frequency domain, and the ending frequency domain position of a channel or signal or resource is a higher position in frequency domain.

[0179] In the disclosure, the term “PDCCH” may be used interchangeably with the terms “downlink control channel” or “control channel for downlink transmission” or “control channel for downlink”.

[0180] In the disclosure, the term “PDCCH” may be used interchangeably with the term “PDCCH candidate”.

[0181] In the disclosure, the term “PDSCH” may be used interchangeably with the terms “downlink data channel” or “data channel for downlink transmission” or “data channel for downlink”.

[0182] In the disclosure, the term “PUCCH” may be used interchangeably with the terms “uplink control channel” or “control channel for uplink transmission” or “control channel for uplink”.

[0183] In the disclosure, the term “PUSCH” may be used interchangeably with the terms “uplink data channel” or “data channel for uplink transmission” or “data channel for uplink”.

[0184] In the disclosure, the term “downlink control information (DCI)” may be used interchangeably with the terms “DCI format” or “control information for downlink”.

[0185] In the disclosure, the term “uplink control information (UCI)” may be used interchangeably with the term “control information for uplink”.

[0186] In the disclosure, detecting DCI includes: receiving and / or decoding DCI.

[0187] In the disclosure, the term “information bits of DCI / UCI” may be used interchangeably with the terms “information bits associated with DCI / UCI” or “information bits included in DCI / UCI” or “information bits corresponding to DCI / UCI”. Optionally, the information bits associated with DCI / UCI may include information bits of the DCI / UCI and check bits (for example, cyclic redundancy check (CRC) bits) corresponding to the DCI / UCI. Optionally, the information bits associated with DCI / UCI may include information bits of the DCI / UCI and bits (for example, cyclic redundancy check (CRC) bits) for checking the DCI / UCI.

[0188] In the disclosure, the term “information bits of PDSCH / PUSCH” may be used interchangeably with the term “information bits associated with PDSCH / PUSCH” or “information bits carried by PDSCH / PUSCH” or “information bits of TB included in PDSCH / PUSCH” or “information bits of TB carried by PDSCH / PUSCH”. Optionally, the information bits associated with the information bits carried by PDSCH / PUSCH may include the information bits of TB carried by PDSCH / PUSCH and the check bits (for example, cyclic redundancy check (CRC) bits) corresponding to the TB. Optionally, the information bits associated with PDSCH / PUSCH may include information bits of PDSCH / PUSCH and bits (for example, cyclic redundancy check (CRC) bits) for checking the TB carried by the PDSCH / PUSCH.

[0189] In the disclosure, the UE may monitor PDCCH (or monitor PDCCH candidates) in PDCCH monitoring occasions. Optionally, the PDCCH monitoring occasion may be one or more (consecutive) time domain units. Optionally, the PDCCH monitoring occasion may be the occasion for monitoring PDCCH, or the occasion for monitoring PDCCH candidates.

[0190] In the disclosure, monitoring a PDCCH candidate may be receiving the PDCCH candidate and / or decoding according to the monitored DCI format.

[0191] In the disclosure, the DCI (format) may be at least one of the followings: DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 1_0, DCI format 1_1, and DCI format 1_2.

[0192] In the disclosure, the PDCCH may carry the DCI and / or the CRC corresponding to the DCI, or the DCI and / or the CRC corresponding to the DCI may be in the PDCCH. Optionally, the CRC may be scrambled in a specific manner. For example, optionally, the CRC may be scrambled based on a radio network temporary identifier (RNTI). Two PDCCHs having the same scrambling may be these two PDCCHs being scrambled by the same RNTI. Optionally, the RNTI may be one of a cell radio network temporary identifier (C-RNTI), a configured scheduling radio network temporary identifier (CS-RNTI).

[0193] In the disclosure, the higher layer parameter includes at least one of a radio resource control (RRC) parameter, a media access control (MAC)-control element (CE) (MAC-CE) parameter. The RRC parameter may be a parameter configured / indicated by RRC signaling. The MAC-CE parameter may be a parameter indicated / activated by MAC-CE signaling. Optionally, information being configured by a higher layer parameter may be the information being indicated / activated by the higher layer parameter.

[0194] In the disclosure, higher layer signaling includes at least one of the RRC parameter and the parameter indicated by MAC-CE; or the higher layer signaling may include at least one of RRC signaling and MAC-CE signaling. Optionally, information being configured by higher layer signaling may be the information being indicated / activated by the higher layer signaling.

[0195] In the disclosure, the UE obtaining configuration information may be the UE receiving / being configured with the configuration information. In the disclosure, “obtaining configuration information” may be used interchangeably with the terms “receiving configuration information” or “being configured with configuration information”.

[0196] In the disclosure, a cell includes at least one of the followings: a serving cell, a candidate cell, a primary cell, a secondary cell, and a special cell.

[0197] In the disclosure, when the DCI schedules a channel or signal, a cell receiving or transmitting the channel or signal may be referred as a scheduled cell. A cell where the DCI is detected or a cell where the DCI is monitored / received may be referred as a scheduling cell.

[0198] In the disclosure, when the DCI schedules a channel or signal, a BWP receiving or transmitting the channel or signal may be referred as a scheduled BWP. A BWP where the DCI is detected, or a BWP where the PDCCH associated with the DCI is monitored / received may be referred as a scheduling BWP.

[0199] In some cases, the base station may enhance the coverage of the communication system or reduce the delay through duplex. Duplex may include subband non-overlapping full duplex (SBFD). For example, a subband non-overlapping full duplex mode may be adopted in a time division duplex (TDD) frequency band (for example, in an unpaired spectrum). Subband non-overlapping duplex may refer to dividing the bandwidth (e.g., carrier bandwidth) of a communication node (e.g., a base station) into more than one subband (e.g., without overlapping between subbands), and uplink and downlink communication may be performed simultaneously on different subbands.

[0200] In the disclosure, the term “time division duplex (TDD) configuration information” may be used interchangeably with the terms “TDD uplink / downlink configuration information” or “information for configuring slot format”.

[0201] In the disclosure, the term “SBFD configuration information” may be used interchangeably with the terms “configuration information used for SBFD” or “configuration information for the SBFD” or “configuration information for the SBFD operation” or “configuration information for the SBFD operation of base station”.

[0202] In the disclosure, the term “subband non-overlapping duplex” may be used interchangeably with “subband full duplex”.

[0203] In the disclosure, the term “frequency domain resource corresponding to uplink subband” may be used interchangeably with the terms “frequency domain position corresponding to uplink subband” or “frequency domain resource of uplink subband” or “frequency domain resource for uplink” or “frequency domain position for uplink” or “frequency domain resource for uplink transmission” or “frequency domain position for uplink transmission”.

[0204] In the disclosure, the term “frequency domain resource corresponding to downlink subband” may be used interchangeably with the terms “frequency domain position corresponding to downlink subband” or “frequency domain resource of downlink subband” or “frequency domain resource for downlink” or “frequency domain position for downlink” or “frequency domain resource for downlink reception” or “frequency domain position for downlink reception”.

[0205] In the disclosure, the term “frequency domain resource corresponding to guardband” may be used interchangeably with the terms “frequency domain position corresponding to guardband” or “frequency domain resource of guardband” or “frequency domain resource between (boundaries of) uplink subband and downlink subband” or “frequency domain position between (boundaries of) uplink subband and downlink subband” or “frequency domain resource for protecting / isolating uplink subband and downlink subband”.

[0206] In the disclosure, the term “SBFD cell” may be used interchangeably with the term “first cell”, but the name of “SBFD cell” is not limited by the disclosure.

[0207] In the disclosure, “determining measurement” may be determining the result of the measurement, or obtaining the result of the measurement, or obtaining the measurement based on the reference signal, or obtaining the measurement based on measurement resource(s), or obtaining the measurement for determining CSI.

[0208] In the disclosure, “determining channel measurement” may be determining the result of the channel measurement, or obtaining the result of the channel measurement, or obtaining the channel measurement based on the reference signal, or obtaining the channel measurement based on measurement resource(s), or obtaining the channel measurement for determining CSI.

[0209] In the disclosure, “determining interference measurement” may be determining the result of the interference measurement, or obtaining the result of the interference measurement, or obtaining the interference measurement based on the reference signal, or obtaining the interference measurement based on measurement resource(s), or obtaining the interference measurement for determining CSI.

[0210] In the disclosure, the term “uplink channel associated with CSI report” may be used interchangeably with the terms “uplink channel corresponding to CSI report” or “uplink channel carrying CSI report”.

[0211] In the disclosure, the term “SBFD cell” may be used interchangeably with “SBFD serving cell”.

[0212] Embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0213] FIG. 4A illustrates a method 410 performed by a user equipment (UE) according to various embodiments of the disclosure. The method 410 includes: at 411, the UE receives configuration information for SBFD (SBFD configuration information) from a base station, wherein the configuration information for the SBFD indicates an uplink subband and a downlink subband and time domain resources for the SBFD (or time domain resources used for the SBFD, or SBFD time domain resources); at 412, if the UE is to receive a first resource (in the uplink subband) on a first time domain resource, and the UE is to receive a second resource (in the downlink subband) on a second time domain resource, and a first condition is satisfied (the first time domain resource and the second time domain resource satisfy the first condition), performing, by the UE, one of the following operations:

[0214] Operation 1: receiving the first resource and / or cancelling the reception of the second resource;

[0215] Operation 2: receiving the second resource and / or cancelling the reception of the first resource;

[0216] Operation 3: receiving the first resource and receiving the second resource.

[0217] Respective steps and operations are described in detail below.

[0218] In some cases, the UE may obtain / receive / be configured with SBFD configuration information. Optionally, the UE may receive / obtain / be configured with the SBFD configuration information via common signaling (e.g., common RRC signaling) or specific signaling (e.g., specific radio resource control (RRC) signaling). Optionally, the SBFD configuration information may be configuration information associated with the SBFD. For example, the SBFD configuration information may be configuration information for the SBFD. For example, the SBFD configuration information may be configuration information associated with SBFD operation (of the base station). For example, the SBFD configuration information may be configuration information for indicating a time domain resource and / or a frequency domain resource associated with the SBFD operation. Optionally, the UE receives the SBFD configuration information in RRC_CONNECTED state. Optionally, the UE may receive the SBFD configuration information in RRC_IDLE / RRC_INACTIVE state.

[0219] ● Optionally, a cell (e.g., serving cell) corresponding to / associated with the SBFD configuration information / where the SBFD configuration information is located / for may be called an SBFD cell.

[0220] ■ Optionally, the cell corresponding to / associated with the SBFD configuration information may be a cell that performs the SBFD operation associated with the SBFD configuration. Optionally, the cell corresponding to / associated with the SBFD configuration information may be a primary cell (e.g., PCell) or a special cell (e.g., a SpCell). Optionally, the cell corresponding to / associated with the SBFD configuration information may be a secondary cell (e.g., SCell). Optionally, the cell corresponding to / associated with the SBFD configuration information may be a cell where the time domain resource and / or the frequency domain resource associated with the SBFD configuration information are located / correspond to. Optionally, the cell corresponding to / associated with the SBFD configuration information may be a cell where the time domain resource and / or the frequency domain resource associated with the SBFD configuration information are applied / used. Optionally, the cell corresponding to / associated with the SBFD configuration information may be the cell where the SBFD configuration information is received, or the cell where the SBFD configuration information is configured.

[0221] ● Optionally, the SBFD configuration information may indicate / correspond to / be associated with the frequency domain resource and / or the (corresponding / associated) time domain resource. Optionally, the time domain resource corresponding to / associated with the frequency domain resource refer to the time domain resource on which the frequency domain resource configured by the SBFD configuration information is applicable / effective / workable. Optionally, the time domain resource corresponding to / associated with the frequency domain resource refers to the time domain resource on which the frequency domain resource configured by the SBFD configuration information is applied / used (by the UE).

[0222] ■ Optionally, the SBFD configuration information may indicate the frequency domain resource (associated with / corresponding to the SBFD time domain resource). The frequency domain resource indicated by / configured by / associated with the SBFD configuration information may be referred as the SBFD frequency domain resource. Optionally, the SBFD configuration information may indicate at least one of a frequency domain resource corresponding to an uplink subband, a frequency domain resource corresponding to a downlink subband, and a frequency domain resource corresponding to a guardband. Optionally, the SBFD frequency domain resource may include at least one of the frequency domain resource corresponding to the uplink subband, the frequency domain resource corresponding to the downlink subband, and the frequency domain resource corresponding to the guardband. The frequency domain units included in the frequency domain resource are described below by taking PRB as an example. Optionally, the frequency domain resource corresponding to the uplink subband may include one or more consecutive PRBs, or a set of consecutive PRBs. Optionally, the frequency domain resource corresponding to the downlink subband may include one or more PRBs, or one or two sets of consecutive PRBs. Optionally, the frequency domain resource corresponding to the guardband may include one PRB or a set of consecutive PRBs or two sets of consecutive PRBs. Optionally, the uplink subband may be a subband for uplink (e.g., uplink transmission). Optionally, the uplink subband may be a frequency domain resource for uplink (e.g., uplink transmission). Optionally, the downlink subband may be a subband for downlink (e.g., downlink reception). Optionally, the downlink subband may be a frequency domain resource for downlink (e.g., downlink reception). Optionally, the frequency domain resource corresponding to the guardband may be determined based on the frequency domain resource corresponding to the uplink subband and / or the frequency domain resource corresponding to the downlink subband (and the carrier bandwidth of the SBFD cell). Optionally, the frequency domain resource corresponding to the downlink subband may be determined based on the frequency domain resource corresponding to the uplink subband and / or the frequency domain resource corresponding to the guardband (and the carrier bandwidth of the SBFD cell). Optionally, the frequency domain resource corresponding to the downlink subband may include one or more PRBs, or one or two sets of consecutive PRBs.

[0223] ◆ Optionally, the SBFD frequency domain resource is determined based on the SBFD configuration information and a reference subcarrier spacing parameter indicated by the TDD configuration information (e.g., the reference subcarrier spacing parameter referenceSubcarrierSpacing included in the TDD configuration information) (for the cell). For example, the SBFD frequency domain resource is determined based on (the parameter associated with the frequency domain indicated by) the SBFD configuration information and the reference subcarrier spacing parameter (e.g., referenceSubcarrierSpacing) included in the TDD configuration information (for the cell). The method may reuse the parameter indicated by the TDD configuration information to determine the SBFD frequency domain resource, saving signaling overhead and improving the efficiency of the communication system.

[0224] ◆ Optionally, the SBFD frequency domain resource is determined based on the reference subcarrier spacing parameter indicated by the SBFD configuration information (e.g., the reference subcarrier spacing parameter referenceSubcarrierSpacing included in the SBFD configuration information). For example, the SBFD time domain resource is determined based on the reference subcarrier spacing parameter (e.g., referenceSubcarrierSpacing) included in the SBFD configuration information. The method may utilize the SBFD configuration information to determine the SBFD frequency domain resource, which facilitates the base station to flexibly perform the SBFD operation, improving the efficiency of the communication system.

[0225] ◆ Optionally, on the SBFD frequency domain resource, the part of the uplink BWP within the frequency domain resource corresponding to the uplink subband associated with the SBFD frequency domain resource may be / is allowed for uplink transmission. Optionally, on the SBFD time domain resource, the part of the uplink BWP not within the frequency domain resource corresponding to the uplink subband associated with the SBFD frequency domain resource may not be / is not allowed for uplink transmission. The method defines the scheduling restriction based on the SBFD configuration, which facilitates the base station to schedule flexibly, improving the efficiency of the communication system.

[0226] ◆ Optionally, on the SBFD frequency domain resource, the part of the downlink BWP within the frequency domain resource corresponding to the downlink subband associated with the SBFD frequency domain resource may be / is allowed for downlink reception. Optionally, on the SBFD time domain resource, the part of the downlink BWP not within the frequency domain resource corresponding to the downlink subband associated with the SBFD frequency domain resource may not be / is not allowed for downlink reception. The method defines the scheduling restriction based on the SBFD configuration, which facilitates the base station to schedule flexibly, improving the efficiency of the communication system.

[0227] ■ Optionally, the SBFD configuration information may indicate / configure / be associated with time domain resource. The time domain resource indicated by / configured by / associated with the SBFD configuration information may be referred as the SBFD time domain resource. The time domain resource other than the SBFD time domain resource (or a part of the time domain resource other than the SBFD time domain resource) may be referred as a non-SBFD time domain resource; or the time domain resource that is not the SBFD time domain resource may be referred as the non-SBFD time domain resource; or the time domain resource outside the SBFD time domain resource and within the downlink slot / downlink symbol and / or flexible slot / flexible symbol indicated / configured by the base station are referred as the non-SBFD time domain resource, or the time domain resource within the uplink slot / uplink symbol indicated / configured by the base station are referred as the non-SBFD time domain resource. The SBFD time domain resource may include several time domain units. Optionally, the SBFD time domain resource is not on the uplink slot and / or uplink symbol indicated by common information. Optionally, the SBFD time domain resource is on the downlink slot and / or downlink symbol indicated by the base station, and / or the SBFD time domain resource is on the flexible slot and / or flexible symbol indicated / configured by the base station. Optionally, the non-SBFD time domain resource is not on the uplink slot or uplink symbol indicated by the common information. Optionally, the non-SBFD time domain resource is on the downlink slot and / or downlink symbol indicated by the base station, and / or the non-SBFD time domain resource is on the flexible slot and / or flexible symbol indicated / configured by the base station. Optionally, the UE may obtain at least one of the uplink symbol, the uplink slot, the downlink symbol, the downlink slot, the flexible symbol, and the flexible slot indicated by the base station via the TDD configuration information. The TDD configuration information includes the TDD configuration information for the cell (e.g., TDD-UL-DL-ConfigurationCommon) and / or the TDD configuration information for the UE (tdd-UL-DL-ConfigurationDedicated).

[0228] ◆ Optionally, the SBFD time domain resource is determined based on the SBFD configuration information and the reference subcarrier spacing parameter indicated by the TDD configuration information (e.g., the reference subcarrier spacing parameter referenceSubcarrierSpacing included in the TDD configuration information) (for the cell). For example, the SBFD time domain resource is determined based on (the parameter associated with the time domain resource indicated by) the SBFD configuration information and the reference subcarrier spacing parameter (e.g., referenceSubcarrierSpacing) included in the TDD configuration information (for the cell). The method may reuse the parameter indicated by the TDD configuration information to determine the SBFD time domain resource, saving signaling overhead and improving the efficiency of the communication system.

[0229] ◆ Optionally, the SBFD time domain resource is determined based on the reference subcarrier spacing parameter indicated by the SBFD configuration information (e.g., the reference subcarrier spacing parameter referenceSubcarrierSpacing included in the SBFD configuration information). For example, the SBFD time domain resource is determined based on the reference subcarrier spacing parameter (e.g., referenceSubcarrierSpacing) included in the SBFD configuration information. The method may utilize the SBFD configuration information to determine the SBFD time domain resource, which facilitates the base station to flexibly perform the SBFD operation, improving the efficiency of the communication system.

[0230] ◆ Optionally, on the BWP, if a symbol / slot is partially overlapped with the SBFD time domain resource, the symbol / slot may not be / is not allowed for transmission / reception. Optionally, on the BWP, if a symbol / slot is fully overlapped with the SBFD time domain resource, the symbol / slot may be / is allowed for transmission / reception. The method defines the scheduling restriction based on the SBFD configuration, which facilitates the base station to schedule flexibly, improving the efficiency of the communication system.

[0231] When the base station performs SBFD operation, on the same time domain resource (for example, on the SBFD time domain resource), one of two UEs served by the base station performs downlink reception, while the other UE performs uplink transmission. The UE performing uplink transmission will cause interference to the UE performing downlink reception. Such interference may be referred as UE-UE cross-link interference (CLI). The reception / transmission method of the resource / reference signal for the CLI measurement is discussed below, so that the UE and the base station have the same understanding of whether the resource / reference signal for the CLI measurement is received / transmitted and / or how to receive / transmit the resource / reference signal for the CLI measurement, improving the reliability of the communication system.

[0232] Resources for interference measurement is discussed below. Optionally, the interference measurement may be an L1 measurement. Optionally, the interference measurement may be a Layer 1 (L1) CLI measurement. Optionally, the resources for interference measurement may include sounding reference signal-reference signal received power (SRS-RSRP) resources and / or CLI received signal strength indication (CLI-RSSI) resources. In the disclosure, the CLI-RSSI resource may be referred as a first type resource, and the SRS-RSRP resource may be referred as a second type resource, but the names of these two types of resources are not limited by the disclosure. Optionally, the SRS-RSRP resource may be associated with the SRS resource. Optionally, the SRS-RSRP resource may be the resource for measuring the SRS. The SRS-RSRP resource may be the resource for measuring the RSRP. Optionally, the SRS-RSRP resource may be the resource for obtaining / determining / measuring the RSRP associated with the CLI based on the SRS. Optionally, the CLI-RSSI resource may be the resource for obtaining / determining / measuring the RSSI (associated with the CLI). Optionally, the CLI-RSSI resource may be the resource for obtaining the RSSI associated with the CLI.

[0233] Optionally, the time domain behavior of a CLI-RSSI resource may be periodic, semi-persistent, or aperiodic. Optionally, the time domain behavior of an SRS-RSRP resource may be periodic, semi-persistent, or aperiodic. Optionally, an SRS-RSRP resource may be a periodic resource, or a semi-persistent resource, or an aperiodic resource.

[0234] The configuration method of the CLI-RSSI resource is discussed below. A CLI-RSSI resource may be configured / defined by CLI-RSSI resource configuration information. Optionally, the CSI reporting configuration may be associated with one or more CLI-RSSI resources. Optionally, the CSI reporting configuration may be associated with one or more CLI-RSSI resources for interference measurement and / or reporting. For example, the CSI reporting configuration may be associated with / include / refer / indicate one or more CLI-RSSI resource configuration information. For example, the CSI reporting configuration may be associated with / include / refer / indicate one or more CLI-RSSI resource IDs. The CLI-RSSI resource configuration information may be the higher layer parameter RSSI-ResourceConfigCLI. The CLI-RSSI resource configuration information may include / configure / indicate at least one of the followings:

[0235] ● A CLI-RSSI resource identity (ID). Optionally, the ID is used for identifying the CLI-RSSI resource. Optionally, the resource ID may be configured by the higher layer parameter (rssi-ResourceId).

[0236] ● The subcarrier spacing. Optionally, the subcarrier spacing may be configured by the higher layer parameter (rssi- subcarrier spacing (SCS)). Optionally, the subcarrier spacing may be the reference subcarrier spacing for CLI-RSSI measurement. The reference subcarrier spacing is used for determining the frequency domain resource of the CLI-RSSI resource. Optionally, the UE may perform measurement not based on the reference subcarrier spacing but based on the subcarrier spacing at which the UE activates the BWP (for example, downlink BWP). For example, the UE performs the CLI-RSSI measurement with the SCS of the active bandwidth part within the configured CLI-RSSI resource in the active BWP regardless of the reference SCS of the measurement resource.

[0237] ● A first frequency domain resource. The first frequency domain resource may be determined based on a first starting frequency domain unit and a first frequency domain resource width.

[0238] ■ The first starting frequency domain unit (e.g., PRB). Optionally, the first starting frequency domain resource may be configured by the higher layer parameter (e.g., startPRB). Optionally, the first starting frequency domain unit may be the index of the starting frequency domain unit of the measurement bandwidth. Here, the measurement bandwidth may be the measurement bandwidth associated with / corresponding to the CLI-RSSI resource. Optionally, the first starting frequency domain unit is not in the uplink subband indicated by the SBFD configuration information. The first starting frequency domain unit is outside the uplink subband indicated by the SBFD configuration information. Optionally, the first starting frequency domain unit is in the downlink subband indicated by the SBFD configuration information. Since the CLI generated by the UE may leak into the downlink subband and affect downlink reception, the CLI needs to be measured in the downlink subband. Such configuration restriction prevents the starting point of the CLI-RSSI resource from occurring in the uplink subband, improving the reliability of the communication system.

[0239] ■ The first frequency domain resource width. In the disclosure, the term “frequency domain resource width” may be used interchangeably with the terms “measurement bandwidth” or “size of frequency domain resource”. Optionally, the first frequency domain resource width may be configured by the higher layer parameter (e.g., nrofPRBs). This higher layer parameter indicates the allowed size of the measurement bandwidth. For example, the parameter indicates the number of (consecutive) PRBs included in the first frequency domain resource width. Optionally, the first frequency domain resource width refers to the resource width of the CLI-RSSI resource, or the number of frequency domain units included in the CLI-RSSI resource, or (the number of) the frequency domain resources included in / occupied by the CLI-RSSI resource.

[0240] ● A second frequency domain resource. The second frequency domain resource may be determined based on a second starting frequency domain unit and a second frequency domain resource width. Optionally, when the downlink subband indicated by the SBFD configuration information is non-consecutive (or includes two sets of consecutive PRBs), the second frequency domain resource is configured (or the second starting frequency domain unit and / or the second frequency domain resource width is configured). Optionally, when the downlink subband indicated by the SBFD configuration information includes (only) a consecutive part (or includes a set of consecutive PRBs), the second frequency domain resource is not configured (or the second starting frequency domain unit and / or the second frequency domain resource width is not configured). Such configuration restriction defines the configuration condition of the second frequency domain resource, which prevents the second frequency domain resource from being incorrectly configured and thus resulting in unclear UE behaviour, improving the reliability of the communication system.

[0241] ■ The second starting frequency domain unit (e.g., PRB). Optionally, the second starting frequency domain resource may be configured by the higher layer parameter (e.g., startPRB2). Optionally, the second starting frequency domain unit may be the index of the starting frequency domain unit of the measurement bandwidth. Here, the measurement bandwidth may be the measurement bandwidth associated with / corresponding to the CLI-RSSI resource. Optionally, the second starting frequency domain unit is not in the uplink subband indicated by the SBFD configuration information. The second starting frequency domain unit is outside the uplink subband indicated by the SBFD configuration information. Optionally, the second starting frequency domain unit is in the downlink subband indicated by the SBFD configuration information. Since the CLI generated by the UE may affect downlink reception, the CLI needs to be measured in the downlink subband. Such configuration restriction prevents the starting point of the CLI-RSSI resource from occurring in the uplink subband, improving the reliability of the communication system.

[0242] ■ The second frequency domain resource width. Optionally, the second measurement bandwidth may be configured by the higher layer parameter (e.g., nrofPRB2). This higher layer parameter indicates the allowed size of the measurement bandwidth. For example, the parameter indicates the number of (consecutive) PRBs included in the second measurement bandwidth. For example, the parameter indicates the number of (consecutive) PRBs included in the second frequency domain resource width. Optionally, the second frequency domain resource width refers to the resource width of the CLI-RSSI resource, or the number of frequency domain units included in the CLI-RSSI resource, or (the number of) the frequency domain resources included in / occupied by the CLI-RSSI resource.

[0243] ● A starting time domain unit (e.g., symbol). Optionally, the starting time domain resource may be configured by the higher layer parameter (e.g., startPosition). Optionally, the starting time domain unit may be the starting symbol in a slot. Here, the starting time domain unit may be for the CLI-RSSI resource. Optionally, the starting time domain unit is not in the uplink symbol indicated by the TDD configuration information. The first starting frequency domain unit is outside the uplink symbol indicated by the TDD configuration information. Optionally, the starting time domain unit is in the SBFD time domain resource indicated by the SBFD configuration information. Since the CLI generated by the UE may affect downlink reception, the CLI needs to be measured on the time domain resource where downlink reception may be performed. Such configuration restriction prevents the starting point of the CLI-RSSI time domain resource from occurring in the time domain resource for uplink, improving the reliability of the communication system.

[0244] ● A time period for measurement. In the disclosure, the term “time period for measurement” may be interchangeably used with the terms “the number of time domain units of the time period for measurement” or “the size of the time domain resource of the time period for measurement”. Optionally, the time period for measurement may be configured by the higher layer parameter (e.g., nrofSymbols). For example, the parameter indicates the number of (consecutive) symbols included in the time period for measurement (in a slot). Optionally, the time period for measurement is for the CLI-RSSI resource. For example, in a slot, the CLI-RSSI resource is from the symbol associated with startPosition to the symbol associated with startPosition+nrofSymbols - 1. For example, the UE may perform measurement from the symbol associated with startPosition to the symbol associated with startPosition+nrofSymbols - 1.

[0245] ● A periodicity and / or offset. Optionally, the periodicity and / or offset may be configured by the higher layer parameter (e.g., rssi-PeriodicityAndOffset). For example, the parameter indicates the periodicity and / or offset for the CLI-RSSI resource. Optionally, the unit of the periodicity and / or offset may be a slot. Optionally, the periodicity and / or offset is for periodic and / or semi-persistent CLI-RSSI resource.

[0246] ● A time domain offset. Optionally, the time domain offset may be configured by a higher layer parameter. For example, the parameter indicates the time domain offset for the CLI-RSSI resource. Optionally, the unit of the time domain offset may be a slot. Optionally, the time domain offset is for aperiodic CLI-RSSI resource. Optionally, the time domain offset indicates the offset between the time domain unit where the triggering DCI is located and the time domain unit where the CLI-RSSI resource is located.

[0247] ● A serving cell. Optionally, the serving cell may be the reference serving cell. Optionally, the reference serving cell is the frequency reference point for determining the CLI-RSSI resource. Optionally, the serving cell may be configured by the higher layer parameter (e.g., refServCelllndex). Optionally, the parameter indicates the index of the serving cell. Optionally, when the serving cell is not configured (or when the corresponding higher layer parameter is not configured), the serving cell is a PCell or an SBFD cell.

[0248] ● Information for indicating a beam. Optionally, the information for indicating the beam may be configured by a higher layer parameter. Optionally, when the CLI-RSSI resource is a periodic resource / semi-persistent resource, information for indicating the beam may be configured. Optionally, when the CLI-RSSI resource is an aperiodic resource, the information for indicating the beam is not configured. Using the information for indicating the beam to enable the UE and the base station to have the same understanding of the beam for the CLI-RSSI resource measurement, improving the reliability of the communication system is described below.

[0249] ■ Optionally, the information for indicating the beam may indicate a reference signal resource. Optionally, the UE measures / receives the CLI-RSSI resource based on the assumption that the reference signal resource and the CLI-RSSI resource are quasi co-located. Optionally, the UE measures / receives the CLI-RSSI resource based on the quasi co-location parameter of the reference signal resource. Optionally, the quasi co-location may be type D quasi co-location.

[0250] ■ Optionally, the information for indicating the beam may indicate a TCI state. Optionally, the TCI state may be a downlink TCI state or a joint TCI state. Optionally, the UE measures / receives the CLI-RSSI resource based on the TCI state. Optionally, the UE measures / receives the CLI-RSSI resource based on the quasi co-location parameter associated with the TCI state. Optionally, the quasi co-location may be type D quasi co-location.

[0251] ■ Optionally, the information for indicating the beam may indicate whether to use / apply the indicated TCI state. Optionally, if the information for indicating the beam indicates using / applying the indicated TCI state, the UE may use / apply the indicated TCI state to measure / receive the CLI-RSSI resource (or the UE may use / apply the quasi co-location parameter associated with the indicated TCI state to measure / receive the CLI-RSSI resource). Optionally, if the information for indicating the beam indicates not using / not applying the indicated TCI state, the UE may not use / not apply the indicated TCI state to measure / receive the CLI-RSSI resource (or the UE may not use / not apply the quasi co-location parameter associated with the indicated TCI state to measure / receive the CLI-RSSI resource). Optionally, the quasi co-location may be type D quasi co-location. Refer below for description of the indicated TCI state.

[0252] How the UE measures the CLI-RSSI resource in time domain is discussed below. In time domain, the UE determines the slot where the (periodic and / or semi-persistent) CLI-RSSI resource is located based on the periodicity and / or offset configured by the CLI-RSSI resource configuration information. In time domain, the slot where the (periodic and / or semi-persistent) CLI-RSSI resource is located is determined based on the periodicity and / or offset configured by the CLI-RSSI resource configuration information. In time domain, the UE determines the slot where the (aperiodic) CLI-RSSI resource is located based on the time domain offset configured by the CLI-RSSI resource configuration information. In time domain, the slot where the (aperiodic) CLI-RSSI resource is located is determined based on the time domain offset configured by the CLI-RSSI resource configuration information. Optionally, if the UE may detect / receive DCI for triggering the aperiodic CLI-RSSI resource in slot n, the aperiodic CLI-RSSI resource is in slot n+k, where k represents the time domain offset. In a slot (for example, the slot where the CLI-RSSI resource is located), the symbol where the CLI-RSSI resource is located / occupied by the CLI-RSSI resource is determined based on the starting time domain unit configured by the CLI-RSSI resource configuration information and the time period for measurement. Optionally, for the semi-persistent CLI-RSSI resource, the UE starts measuring the CLI-RSSI resource after the signaling for activating the semi-persistent CLI-RSSI resource is applied. Optionally, for the semi-persistent CLI-RSSI resource, the UE stops measuring the CLI-RSSI resource after the signaling for deactivating the semi-persistent CLI-RSSI resource is applied. The signaling for activating / deactivating the semi-persistent CLI-RSSI resource may be higher layer signaling (e.g. MAC-CE).

[0253] Optionally, the (periodic and / or semi-persistent and / or aperiodic) CLI-RSSI resource configured by the base station is in the SBFD time domain resource (the base station ensures that the configured (periodic and / or semi-persistent and / or aperiodic) CLI-RSSI resource is in the SBFD time domain resource). Optionally, the periodicity of the (periodic and / or semi-persistent and / or aperiodic) CLI-RSSI resource configured by the base station is the same as the periodicity of the SBFD time domain resource, or the periodicity of the (periodic and / or semi-persistent and / or aperiodic) CLI-RSSI resource configured by the base station and the periodicity of the SBFD time domain resource are in a integer multiple relation (the base station ensures that the periodicity of the (periodic and / or semi-persistent and / or aperiodic) CLI-RSSI resource is the same as the periodicity of the SBFD time domain resource, or the periodicity of the (periodic and / or semi-persistent and / or aperiodic) CLI-RSSI resource and the periodicity of the SBFD time domain resource are in a integer multiple relation). Such configuration restriction may ensure that the UE only performs measurement on (the occasion of) the CLI-RSSI resource in the SBFD time domain resource, avoiding the generation of inaccurate results by the UE performing measurement on the time domain resource other than the SBFD time domain resource without CLI and improving the reliability of the communication system.

[0254] For example, the UE performs measurement for (the occasion of) the CLI-RSSI resource (only) in the SBFD time domain resource. Optionally, the UE (only) measures (the occasion of) the CLI-RSSI resource in the SBFD time domain resource. The method may ensure that the UE only performs measurement on (the occasion of) the CLI-RSSI resource in the SBFD time domain resource, avoiding the generation of inaccurate results by the UE performing measurement on the time domain resource other than the SBFD time domain resource without CLI and improving the reliability of the communication system.

[0255] How the UE measures the CLI-RSSI resource in the frequency domain is discussed below. Optionally, the UE may determine the first frequency domain resource of the CLI-RSSI resource (or the frequency domain resource occupied by the CLI-RSSI resource) based on the first starting frequency domain unit and the first frequency domain resource width. Optionally, the first frequency domain resource of the CLI-RSSI resource (or the frequency domain resource occupied by the CLI-RSSI resource) may be determined based on the first starting frequency domain unit and the first frequency domain resource width. Optionally, the frequency domain reference point of the CLI-RSSI resource is determined based on at least one of the serving cell (e.g., the reference serving cell), the SBFD configuration information. Optionally, the frequency domain reference point of the CLI-RSSI resource refers to the frequency domain reference point of the first starting frequency domain unit, or the frequency domain reference point of the first frequency domain resource. Optionally, the frequency domain reference point of the CLI-RSSI resource is the predefined CRB (e.g., CRB #0, CRB #1) of the serving cell (e.g., the reference serving cell). Optionally, the frequency domain reference point of the CLI-RSSI resource is the predefined subcarrier (e.g. subcarrier #0, subcarrier #1) of the predefined CRB (e.g. CRB #0) of the serving cell (e.g. the reference serving cell). Optionally, the frequency domain reference point of the CLI-RSSI resource is determined based on the downlink subband / the uplink subband indicated by the SBFD configuration information. Optionally, the frequency domain reference point of the CLI-RSSI resource is the predefined subcarrier (e.g., subcarrier #0, subcarrier #1) of the predefined CRB (e.g., the lowest / highest RB) of the downlink subband / the uplink subband indicated by the SBFD configuration information. Optionally, the UE determines the starting frequency domain unit based on the frequency domain unit of the frequency domain reference point and the indication of the higher layer parameter associated with the starting frequency domain unit. Optionally, the starting frequency domain unit may be determined based on the frequency domain unit of the frequency domain reference point and the indication of the higher layer parameter associated with the starting frequency domain unit. For example, if the frequency domain reference point is frequency domain unit #n and the higher layer parameter indicates y, the starting frequency domain unit is frequency domain unit #n+y or frequency domain unit #n+y-1.

[0256] Optionally, the UE may determine the second frequency domain resource of the CLI-RSSI resource based on the second starting frequency domain unit and the second frequency domain resource width. Optionally, the second frequency domain resource of the CLI-RSSI resource may be determined based on the second starting frequency domain unit and the second frequency domain resource width. For example, the UE may determine the frequency domain resource occupied by the CLI-RSSI resource based on the second starting frequency domain unit and the second frequency domain resource width. For example, the frequency domain resource occupied by the CLI-RSSI resource may be determined based on the second starting frequency domain unit and the second frequency domain resource width. Optionally, the frequency domain reference point of the CLI-RSSI resource is determined based on one of the serving cell (e.g., the reference serving cell or the SBFD cell), the SBFD configuration information. Optionally, the frequency domain reference point of the CLI-RSSI resource refers to the frequency domain reference point of the second starting frequency domain unit, or the frequency domain reference point of the second frequency domain resource. Optionally, refer above for the method of determining the frequency domain reference point of the CLI-RSSI resource. Optionally, the frequency domain reference point of the CLI-RSSI resource / the second frequency domain resource may be determined based on the first frequency domain resource. For example, the frequency domain reference point of the second frequency domain resource may be based on / equal to the starting frequency domain unit / ending frequency domain unit of the first frequency domain resource. Optionally, when the downlink subband indicated by the SBFD configuration information include two downlink subbands (for example, include two downlink subbands composed of consecutive PRBs), the frequency domain reference point of the CLI-RSSI resource / the second frequency domain resource may be determined based on the downlink subband with the higher / lower frequency domain position where the frequency domain resource is located of the two downlink subbands. Here, the frequency domain position where the frequency domain resource is located being higher / lower refers the frequency domain position where the starting frequency domain unit (or the ending frequency domain unit) of the downlink subband being higher / lower.

[0257] The above method defines the method of determining the frequency domain reference point of the CLI-RSSI resource, so that the UE and the base station have the same understanding of the frequency domain reference point of the CLI-RSSI resource, improving the reliability of the communication system.

[0258] Optionally, the UE may determine the frequency domain resource of the CLI-RSSI resource based on the SBFD configuration information. Optionally, the frequency domain resource of the CLI-RSSI resource may be determined based on the SBFD configuration information. Optionally, in frequency domain, the UE may determine the CLI-RSSI resource based on the first frequency domain resource and the downlink subband / the uplink subband indicated by the SBFD configuration information and / or the downlink BWP. Optionally, in frequency domain, the CLI-RSSI resource may be determined based on the first frequency domain resource and the downlink subband / the uplink subband indicated by the SBFD configuration information and / or the downlink BWP. Optionally, the frequency domain resource of the CLI-RSSI resource (or the measurement bandwidth of the CLI-RSSI resource) is the intersection of the first frequency domain resource and the downlink subband / the uplink subband. Optionally, the frequency domain resource of the CLI-RSSI resource (or the measurement bandwidth of the CLI-RSSI resource) is the intersection of the first frequency domain resource and the downlink subband and the downlink BWP. Optionally, the frequency domain resource of the CLI-RSSI resource (or the measurement bandwidth of the CLI-RSSI resource) is the intersection of the first frequency domain resource and the uplink subband and the downlink BWP. Optionally, the UE may determine the CLI-RSSI resource (determine the measurement bandwidth of the CLI-RSSI resource) based on the frequency domain resource of the first frequency domain resource in the downlink subband indicated by the SBFD configuration information (and the downlink BWP). Optionally, the CLI-RSSI resource (or the measurement bandwidth of the CLI-RSSI resource) may be determined based on the frequency domain resource of the first frequency domain resource in the downlink subband indicated by the SBFD configuration information (and the downlink BWP). For example, the CLI-RSSI resource (the measurement bandwidth of the CLI-RSSI resource) may be determined based on the frequency domain resource of the first frequency domain resource within the downlink BWP and in the downlink subband indicated by the SBFD configuration information. Optionally, the UE may determine the CLI-RSSI resource (determine the measurement bandwidth of the CLI-RSSI resource) based on the frequency domain resource excluding the frequency domain resource of the first frequency domain resource outside the downlink subband indicated by the SBFD configuration information (and the downlink BWP). Optionally, the CLI-RSSI resource (or the measurement bandwidth of the CLI-RSSI resource) may be determined based on the frequency domain resource excluding the frequency domain resource of the first frequency domain resource outside the downlink subband indicated by the SBFD configuration information (and the downlink BWP). For example, the CLI-RSSI resource (the measurement bandwidth of the CLI-RSSI resource) may be determined based on the frequency domain resource of the first frequency domain resource within the downlink BWP and not outside the downlink subband indicated by the SBFD configuration information. Optionally, the UE may determine the CLI-RSSI resource (determine the measurement bandwidth of the CLI-RSSI resource) based on the frequency domain resource of the first frequency domain resource outside the uplink subband indicated by the SBFD configuration information (and the downlink BWP). Optionally, the CLI-RSSI resource (or the measurement bandwidth of the CLI-RSSI resource) may be determined based on the frequency domain resources of the first frequency domain resource outside the uplink subband indicated by the SBFD configuration information (and the downlink BWP). For example, the CLI-RSSI resource (measurement bandwidth of the CLI-RSSI resource) may be determined based on the frequency domain resource of the first frequency domain resource within the downlink BWP and outside the uplink subband indicated by the SBFD configuration information. A variant of the above method is to ensure by the base station that the first frequency domain resource is in the downlink subband and / or the downlink BWP. Optionally, the first frequency domain resource is in the downlink subband indicated by the SBFD configuration information and / or the downlink BWP (of the SBFD cell). Optionally, the UE expects the first frequency domain resource to be in the downlink subband indicated by the SBFD configuration information and / or the downlink BWP. Here, the downlink BWP may be the active BWP (of the serving cell or the SBFD cell). The method enables the UE to perform CLI measurement only in the SBFD downlink subband, avoiding the generation of incorrect results due to the measurement by the UE in the frequency domain resource outside the downlink subband (CLI cannot be measured through the CLI-RSSI resource in the frequency domain resource outside the downlink subband), improving the reliability of the communication system.

[0259] Optionally, in frequency domain, the UE may determine the CLI-RSSI resource based on the first frequency domain resource and the second frequency domain resource. Optionally, in frequency domain, the CLI-RSSI resource may be determined based on the first frequency domain resource and the second frequency domain resource. Optionally, the UE may determine the CLI-RSSI resource based on the first starting frequency domain unit and the first frequency domain resource width and the second starting frequency domain unit and the second frequency domain resource width. Optionally, the CLI-RSSI resource may be determined based on the first starting frequency domain unit and the first frequency domain resource width and the second starting frequency domain unit and the second frequency domain resource width. Optionally, in frequency domain, the CLI-RSSI resource includes the first frequency domain resource and the second frequency domain resource. Optionally, the UE determines that the CLI-RSSI resource is the union of the first frequency domain resource and the second frequency domain resource. Optionally, the CLI-RSSI resource may be the union of the first frequency domain resource and the second frequency domain resource. Optionally, the first frequency domain resource and the second frequency domain resource are non-overlapped. Optionally, the first frequency domain resource and the second frequency domain resource are non-consecutive. Optionally, the first frequency domain resource is in the downlink subband indicated by the SBFD configuration information and / or the downlink BWP (of the SBFD cell). Optionally, the second frequency domain resource is in the downlink subband indicated by the SBFD configuration information and / or the downlink BWP. Optionally, the UE expects the first frequency domain resource and / or the second frequency domain resource to be in the downlink subband indicated by the SBFD configuration information and / or the downlink BWP. Here, the downlink BWP may be the active BWP (of the serving cell or the SBFD cell). The method enables the UE to perform CLI measurement in non-consecutive SBFD downlink subbands through multiple consecutive resources, improving the flexibility of the communication system.

[0260] The configuration method of the SRS-RSRP resource is discussed below. Optionally, the CSI reporting configuration may be associated with one or more SRS-RSRP resources. Optionally, the CSI reporting configuration may be associated with one or more SRS-RSRP resources for interference measurement and / or reporting. For example, the CSI reporting configuration may be associated with / include / refer / indicate one or more SRS-RSRP resource configuration information. For example, the CSI reporting configuration may be associated with / include / refer / indicate one or more SRS-RSRP resource IDs. An SRS-RSRP resource configuration information may include / configure / indicate at least one of the followings:

[0261] ● An SRS-RSRP resource ID. Optionally, the ID is used for identifying the SRS-RSRP resource. Optionally, the resource ID may be configured by a higher layer parameter. Optionally, the resource ID may be determined based on the ID of the SRS resource associated with the SRS-RSRP resource. For example, the resource ID is equal to the ID of the SRS resource associated with the SRS-RSRP resource. For example, the resource ID is equal to the summation of the ID of the SRS resource associated with the SRS-RSRP resource and Kid,offset, where Kid,offsetmay be predefined (e.g., one of 1, 2, 3, 4) or indicated by the base station or based on the UE capability.

[0262] ● A subcarrier spacing. Optionally, the subcarrier spacing may be configured by a higher layer parameter (srs-SCS). Optionally, the subcarrier spacing may be the subcarrier spacing of the SRS-RSRP resource. Optionally, the subcarrier spacing may be the subcarrier spacing of the SRS resource associated with the SRS-RSRP resource. Optionally, the UE determines to measure the SRS-RSRP resource based on the subcarrier spacing of the SRS-RSRP resource and the subcarrier spacing of the downlink active BWP (for measuring the SRS-RSRP resource), or determines not to measure the SRS-RSRP resource. Optionally, whether the SRS-RSRP resource is measured is determined based on the subcarrier spacing of the SRS-RSRP resource and the subcarrier spacing of the downlink active BWP (for measuring the SRS-RSRP resource). Optionally, if the subcarrier spacing of the SRS-RSRP resource is the same as the subcarrier spacing of the downlink active BWP, the UE may measure the SRS-RSRP resource. Optionally, if the subcarrier spacing of the SRS-RSRP resource is different from the subcarrier spacing of the downlink active BWP, the UE does not measure the SRS-RSRP resource.

[0263] ● A BWP. Optionally, the BWP may be the reference BWP. Optionally, the BWP may be the frequency reference point for determining the SRS-RSRP resource. Optionally, the BWP may be configured by a higher layer parameter (e.g., refServCelllndex). Optionally, the parameter indicates the index of the BWP. Optionally, when the BWP is not configured (or when the higher layer parameter is not configured), the BWP is a predefined BWP (for example, BWP #0, or the BWP with the smallest ID).

[0264] ● A serving cell. Optionally, the serving cell may be the reference serving cell. Optionally, the serving cell may be used for determining the serving cell to which the BWP belongs. Optionally, the serving cell may be the frequency reference point for determining the SRS-RSRP resource. Optionally, the serving cell may be configured by a higher layer parameter (e.g., refServCelllndex). Optionally, the parameter indicates the index of the serving cell. Optionally, when the serving cell is not configured (or when the higher layer parameter is not configured), the serving cell is a PCell or an SBFD cell.

[0265] ● An SRS resource (for uplink channel transmission). Optionally, the SRS resource may be the SRS resource associated with the SRS-RSRP resource. Optionally, the UE performs measurement on the SRS resource. Optionally, the SRS resource may be configured by a higher layer parameter (e.g., srs-Resource). Optionally, the configuration information of the SRS resource may indicate at least one of the ID of the SRS resource, the time domain behaviour of the SRS resource, the frequency domain position of the SRS resource and / or the frequency domain offset (e.g., the higher layer parameters freqDomainPosition and / or freqDomainShift). Optionally, the time domain behaviour of the SRS-RSRP resource associated with the SRS resource is determined based on the time domain behaviour of the SRS resource. For example, if the configuration information of the SRS resource indicates that the SRS resource is an aperiodic resource, the SRS-RSRP resource associated with the SRS resource is also an aperiodic resource. Optionally, the frequency domain resource of the SRS-RSRP resource associated with the SRS resource is determined based on the frequency domain resource of the SRS resource. For example, the frequency domain resource of the SRS-RSRP resource is based on / equal to the frequency domain resource of the SRS resource associated with the SRS-RSRP resource. Optionally, the time domain resource of the SRS-RSRP resource associated with the SRS resource is determined based on the time domain resource of the SRS resource. For example, the time domain resource of the SRS-RSRP resource is based on / equal to the time domain resource of the SRS resource associated with the SRS-RSRP resource.

[0266] ● A time domain offset. Optionally, the time domain offset may be configured by higher layer signaling. Optionally, the time domain offset indicates the offset of the time domain units between the triggering DCI and the SRS-RSRP resource. Optionally, the unit of the time domain offset may be a slot. Optionally, the time domain offset is for aperiodic SRS-RSRP resource.

[0267] ● Information for indicating a beam. Optionally, the information for indicating the beam may be configured by a higher layer parameter. Optionally, when the SRS-RSRP resource is a periodic resource / semi-persistent resource, the information for indicating the beam may be configured. Optionally, when the SRS-RSRP resource is an aperiodic resource, the information for indicating the beam is not configured. Using the information for indicating the beam to enable the UE and the base station to have the same understanding of the beam for the SRS-RSRP resource measurement, improving the reliability of the communication system is described below.

[0268] ■ Optionally, the information for indicating the beam may indicate a reference signal resource. Optionally, the UE measures / receives the SRS-RSRP resource based on the assumption that the reference signal resource and the SRS-RSRP resource are quasi co-located. Optionally, the reception / measurement of the SRS-RSRP resource is determined based on the assumption that the reference signal resource and the SRS-RSRP resource are quasi co-located. Optionally, the UE measures / receives the SRS-RSRP resource based on the quasi co-location parameter of the reference signal resource. Optionally, the reception / measurement of the SRS-RSRP resource is determined based on the quasi co-location parameter of the reference signal resource. Optionally, the quasi co-location may be type D quasi co-location.

[0269] ■ Optionally, the information for indicating the beam may indicate a TCI state. Optionally, the TCI state may be a downlink TCI state or a joint TCI state. Optionally, the UE measures / receives the SRS-RSRP resource based on the TCI state. Optionally, the measurement / reception of the SRS-RSRP resources is determined based on the TCI state. Optionally, the UE measures / receives the SRS-RSRP resource based on the quasi co-location parameter associated with the TCI state. Optionally, the measurement / reception of the SRS-RSRP resources is determined based on the quasi co-location parameter associated with the TCI state. Optionally, the quasi co-location may be type D quasi co-location.

[0270] ■ Optionally, the information for indicating the beam may indicate whether to use / apply the indicated TCI state. Optionally, if the information for indicating the beam indicates using / applying the indicated TCI state, the UE may use / apply the indicated TCI state to measure / receive the SRS-RSRP resource (or the UE may use / apply the quasi co-location parameter associated with the indicated TCI state to measure / receive the SRS-RSRP resource, or the quasi co-location parameter for the measurement / reception of the SRS-RSRP resources is determined based on the quasi co-location parameter associated with the indicated TCI state). Optionally, if the information for indicating the beam indicates not using / not applying the indicated TCI state, the UE may not use / not apply the indicated TCI state to measure / receive the SRS-RSRP resource (or the UE may not use / not apply the quasi co-location parameter associated with the indicated TCI state to measure / receive the SRS-RSRP resource). Optionally, the quasi co-location may be type D quasi co-location. Refer below for description of the indicated TCI state.

[0271] Since SRS-based CLI measurement needs to rely on the uplink SRS transmission of other UE(s), these SRS resources are usually in the uplink subband in the SBFD time domain resource or the uplink symbol / uplink slot indicated / configured by the base station. Therefore, the UE needs to perform measurement on the SRS-RSRP resource in the corresponding resource.

[0272] How the UE performs measurement on the SRS-RSRP resource in time domain is discussed below. In time domain, the UE determines the time domain resource where the SRS-RSRP resource is located based on the SRS-RSRP resource configuration information. Optionally, the UE determines the slot where the corresponding SRS-RSRP resource is located based on the time domain offset. In time domain, the time domain resource where the SRS-RSRP resource is located is determined based on the SRS-RSRP resource configuration information. Optionally, the slot where the SRS-RSRP resource is located is determined based on the corresponding time domain offset. For example, the UE receives / detects DCI in slot n, where the DCI triggers an SRS-RSRP resource, and the slot offset associated with the SRS-RSRP resource is x, the UE measures the SRS-RSRP resource triggered by the DCI in slot n+x.

[0273] Optionally, the (periodic and / or semi-persistent and / or aperiodic) SRS-RSRP resource configured by the base station is in the SBFD time domain resource and / or the uplink slot / the uplink symbol indicated / configured by the base station (the base station ensures that the configured (periodic and / or semi-persistent and / or aperiodic) SRS-RSRP resource is in the SBFD time domain resource and / or the uplink slot / the uplink symbol indicated / configured by the base station). The method may ensure that the SRS-RSRP resource only occurs in the time domain resource where the SRS uplink transmission may be performed, avoiding the inaccuracy of the measurement results caused by the UE performing measurement on the time domain resource where the SRS resource cannot be transmitted, and improving the reliability of the communication system.

[0274] Optionally, the UE performs measurement for (the occasion of) the SRS-RSRP resource (only) in the SBFD time domain resource and / or the uplink slot / the uplink symbol indicated / configured by the base station. Optionally, the UE measures (only) (the occasion of) the SRS-RSRP resource in the SBFD time domain resource and / or the uplink slot / the uplink symbol indicated / configured by the base station. The method may ensure that the UE performs measurement on the SBFD time domain resource and / or the CLI-RSSI resource in the uplink symbol / the uplink slot indicated by the base station, avoiding the inaccuracy of the measurement results caused by the UE performing measurement on the time domain resource where the SRS resource cannot be transmitted, and improving the reliability of the communication system.

[0275] How the UE performs measurement on the SRS-RSRP resource in frequency domain is discussed below. Optionally, the UE may determine the frequency domain reference point of the SRS-RSRP resource based on the serving cell and BWP indicated by the SRS-RSRP resource configuration information. Optionally, the frequency domain reference point of the SRS-RSRP resource may be determined based on the serving cell and BWP indicated by the SRS-RSRP resource configuration information. Optionally, the UE may determine the frequency domain reference point of the SRS-RSRP resource based on the SBFD resource configuration information. Optionally, the frequency domain reference point of the SRS-RSRP resource may be determined based on the SBFD resource configuration information. Optionally, the UE may determine the frequency domain reference point of the SRS-RSRP resource based on the uplink subband / the downlink subband indicated by the SBFD resource configuration information. Optionally, the frequency domain reference point of the SRS-RSRP resource may be determined based on the uplink subband / the downlink subband indicated by the SBFD resource configuration information. Optionally, the UE may determine the frequency domain reference point of the SRS-RSRP resource based on the lowest / highest frequency domain unit (for example, subcarrier or RB) of the uplink subband / the downlink subband indicated by the SBFD resource configuration information. Optionally, the frequency domain reference point of the SRS-RSRP resource may be determined based on the lowest / highest frequency domain unit (for example, subcarrier or RB) of the uplink subband / the downlink subband indicated by the SBFD resource configuration information. The above method defines the method of determining the frequency domain reference point of the SRS-RSRP resource, so that the UE and the base station have the same understanding of the frequency domain reference point of the SRS-RSRP resource, improving the reliability of the communication system.

[0276] Optionally, the SRS-RSRP resource is determined in frequency domain based on the SRS resource associated with the SRS-RSRP resource. For example, the UE determines the frequency domain resource of the SRS-RSRP resource based on the configuration information of the SRS resource associated with the SRS-RSRP resource (e.g., the frequency domain position and / or frequency domain offset of the SRS resource indicated by the configuration information of the SRS resource). For example, the frequency domain resource of the SRS-RSRP resource is determined based on the configuration information of the SRS resource associated with the SRS-RSRP resource (e.g., the frequency domain position and / or frequency domain offset of the SRS resource indicated by the configuration information of the SRS resource). For example, the frequency domain resource associated with the SRS-RSRP resource is the same as the frequency domain resource of the SRS resource associated with the SRS-RSRP resource. Optionally, the frequency domain resource determined based on the SRS-RSRP resource configuration information (or based on the configuration information of the SRS resource associated with the SRS-RSRP resource configuration information) may be called a third frequency domain resource.

[0277] Optionally, the UE may determine the frequency domain resource of the SRS-RSRP resource based on the SBFD configuration information. Optionally, the frequency domain resource of the SRS-RSRP resource may be determined based on the SBFD configuration information. Optionally, in frequency domain, the UE may determine (the frequency domain resource / measurement bandwidth of) the SRS-RSRP resource based on the third frequency domain resource and the downlink subband / the uplink subband indicated by the SBFD configuration information and / or the downlink BWP. Optionally, in frequency domain, (the frequency domain resource / measurement bandwidth of) the SRS-RSRP resource may be determined based on the third frequency domain resource and the downlink subband / the uplink subband indicated by the SBFD configuration information and / or the downlink BWP. Optionally, the frequency domain resource of the SRS-RSRP resource (or the measurement bandwidth of the SRS-RSRP resource) is the intersection of the third frequency domain resource and the downlink subband / the uplink subband. Optionally, the frequency domain resource of the SRS-RSRP resource (or the measurement bandwidth of the SRS-RSRP resource) is based on the intersection of the third frequency domain resource and the uplink subband. Optionally, the frequency domain resource of the SRS-RSRP resource (or the measurement bandwidth of the SRS-RSRP resource) is the intersection of the third frequency domain resource and the uplink subband and the downlink BWP. Optionally, the frequency domain resource of the SRS-RSRP resource (or the measurement bandwidth of the SRS-RSRP resource) is based on the intersection of the third frequency domain resource and the downlink subband. Optionally, the frequency domain resource of the SRS-RSRP resource (or the measurement bandwidth of the SRS-RSRP resource) is the intersection of the third frequency domain resource and the downlink subband and the downlink BWP. Optionally, the UE may determine (the frequency domain resource / measurement bandwidth of) the SRS-RSRP resource based on the frequency domain resource of the third frequency domain resource in the downlink subband / the uplink subband indicated by the SBFD configuration information (and the downlink BWP). Optionally, (the frequency domain resource / measurement bandwidth of) the SRS-RSRP resource may be determined based on the frequency domain resource of the third frequency domain resource in the downlink subband / the uplink subband indicated by the SBFD configuration information (and the downlink BWP). For example, the SRS-RSRP resource (the measurement bandwidth of the SRS-RSRP resource) may be determined based on the frequency domain resource of the third frequency domain resource within the downlink BWP and in the uplink subband indicated by the SBFD configuration information. Optionally, the UE may determine (the frequency domain resource / measurement bandwidth of) the SRS-RSRP resource based on the frequency domain resource excluding the frequency domain resource of the third frequency domain resource outside the downlink subband / the uplink subband indicated by the SBFD configuration information (and the downlink BWP). Optionally, (the frequency domain resource / measurement bandwidth of) the SRS-RSRP resource may be determined based on the frequency domain resource excluding the frequency domain resource of the third frequency domain resource outside the downlink subband / the uplink subband indicated by the SBFD configuration information (and the downlink BWP). For example, the SRS-RSRP resource (measurement bandwidth of the SRS-RSRP resource) may be determined based on the frequency domain resource of the third frequency domain resource within the downlink BWP and not outside the uplink subband indicated by the SBFD configuration information. Optionally, the UE may determine (the frequency domain resource / measurement bandwidth of) the SRS-RSRP resource based on the frequency domain resource of the third frequency domain resource outside the downlink subband / the uplink subband indicated by the SBFD configuration information (and the downlink BWP). Optionally, (the frequency domain resource / measurement bandwidth of) the SRS-RSRP resource may be determined based on the frequency domain resource of the third frequency domain resource outside the downlink subband / the uplink subband indicated by the SBFD configuration information (and the downlink BWP). For example, the SRS-RSRP resource (the measurement bandwidth of the SRS-RSRP resource) may be determined based on the frequency domain resource of the third frequency domain resource within the downlink BWP and outside the downlink subband indicated by the SBFD configuration information. A variant of the above method is to ensure by the base station that the third frequency domain resource is in the downlink subband and / or the downlink BWP. Optionally, the third frequency domain resource is in the downlink subband indicated by the SBFD configuration information and / or the downlink BWP (of the SBFD cell). Optionally, the UE expects the third frequency domain resource to be in the downlink subband indicated by the SBFD configuration information and / or the downlink BWP. Optionally, the third frequency domain resource is in the uplink subband indicated by the SBFD configuration information and / or the downlink BWP (of the SBFD cell). Optionally, the UE expects the third frequency domain resource to be in the uplink subband indicated by the SBFD configuration information and / or the downlink BWP. Here, the downlink BWP may be the active BWP (of the serving cell or the SBFD cell). The method allows the UE to perform measurement of the SRS only in the uplink subband of SBFD, avoiding the generation of inaccurate results by the UE performing measurement on the frequency domain resource other than the uplink subband where the SRS is not transmitted and improving the reliability of the communication system.

[0278] The indicated TCI state is discussed below. Optionally, the UE may obtain the indicated TCI state (from the base station). Optionally, the UE may be configured with the higher layer parameter associated with the TCI state (e.g., dl-OrJointTCI-StateList). Optionally, the higher layer parameter associated with the TCI state (e.g., dl-OrJointTCI-StateList) may be in the higher layer parameter PDSCH-Config. Optionally, the higher layer parameter associated with the TCI state (e.g., dl-OrJointTCI-StateList) is used for providing a reference signal for the quasi co-location for DM-RS of PDSCH and DM-RS of PDCCH in a BWP / CC, for CSI-RS, and to provide a reference, if applicable, for determining uplink transit spatial filter. Optionally, the uplink transmit spatial filter may be for dynamic-grant and configured-grant based PUSCH and PUCCH resource, and SRS. Optionally, the UE receives / applies the indication of the TCI state. Optionally, the UE receives / applies / has the indicated TCI state. Optionally, the UE applies / uses the indicated TCI state after receiving TCI state indication information.

[0279] How the UE measures the resource for the CLI measurement based on the indicated TCI state (or how the UE determines the beam of the resource for the CLI measurement based on the indicated TCI state) is discussed below. Optionally, the UE measures the resource for the CLI measurement based on the (obtained) indicated TCI state. Optionally, the UE determines the beam (e.g. the QLC parameter or the TCI state) of the resource for the CLI measurement based on the (obtained) indicated TCI state. Here, the resource for the CLI measurement may be an aperiodic resource. Optionally, when at least one of the following conditions is satisfied, the UE measures the resource for the CLI measurement based on the indicated TCI state (or the UE determines the beam of the resource for the CLI measurement based on the indicated TCI state):

[0280] ● The time domain interval between the DCI triggering the resource (e.g., aperiodic resource) for the CLI measurement and the resource is less than or equal to a threshold. Optionally, the threshold is determined based on the UE capability. For example, the threshold may be indicated by the reported UE capability. Optionally, the time domain interval between the DCI and the resource may be the time domain offset / time domain interval between the (starting / ending) time domain unit of the PDCCH carrying the DCI and the (starting / ending) time domain unit of the resource for the CLI measurement;

[0281] ● The time domain interval between the DCI triggering the resource (e.g., aperiodic resource) for the CLI measurement and the resource to which the resource for the CLI measurement is mapped is less than or equal to a threshold. Optionally, the threshold is determined based on the UE capability. For example, the threshold may be indicated by the reported UE capability. Optionally, the threshold may be the threshold same as the threshold in the above condition. Optionally, the resources to which the resources for the CLI measurement are mapped may be one or more resources determined by the UE based on the mapping relation and mapped to the resources for the CLI measurement. Optionally, the method for the UE to determine the one or more resources to which the resources for the CLI measurement are mapped based on the mapping relation is described below.

[0282] The above method defines how the UE determines the beam of the resource for the CLI measurement based on the indicated TCI state, so that the UE and the base station have the same understanding of the beam of the resource for the CLI measurement, improving the reliability of the communication system.

[0283] How the UE measures the resource for the CLI measurement based on the information for indicating the beam associated with the resource for the CLI measurement / the information for indicating the beam with which the resource for the CLI measurement is configured (or how the UE determines the beam of the resource for the CLI measurement based on the information for indicating the beam associated with the resource for the CLI measurement / the information for indicating the beam with which the resource for the CLI measurement is configured) is discussed below. Optionally, the UE measures the resource for the CLI measurement based on the information for indicating the beam. Optionally, the measurement of the resource for the CLI measurement is based on the information for indicating the beam. Optionally, the UE determines the beam (for example, the QLC parameter or the TCI state) of the resource for the CLI measurement based on the information for indicating the beam. Optionally, the beam (for example, the QLC parameter or the TCI state) of the resource for the CLI measurement is determined based on the information for indicating the beam. Here, the resource for the CLI measurement may be an aperiodic resource. Optionally, when at least one of the following conditions is satisfied, the UE measures the resource for the CLI measurement based on the information for indicating the beam (or the UE determines the beam of the resource for the CLI measurement based on the information for indicating the beam, or the beam of the resource for the CLI measurement is determined based on the information for indicating the beam):

[0284] ● The time domain interval between the DCI triggering the resource (e.g., aperiodic resource) for the CLI measurement and the resource is greater than or equal to a threshold. Optionally, the threshold is determined based on the UE capability. For example, the threshold may be indicated by the reported UE capability. Optionally, the time domain interval between the DCI and the resource may be the time domain offset / time domain interval between the (starting / ending) time domain unit of the PDCCH carrying the DCI and the (starting / ending) time domain unit of the resource for the CLI measurement;

[0285] ● The time domain interval between the DCI triggering the resource (e.g., aperiodic resource) for the CLI measurement and the resource to which the resource for the CLI measurement is mapped is greater than or equal to a threshold. Optionally, the threshold is determined based on the UE capability. For example, the threshold may be indicated by the reported UE capability. Optionally, the threshold may be the threshold same as the threshold in the above / previous condition. Optionally, the resources to which the resources for the CLI measurement are mapped may be one or more resources determined by the UE based on the mapping relation and mapped to the resources for the CLI measurement. Optionally, the method of determining the one or more resources to which the resources for the CLI measurement are mapped based on the mapping relation is described below.

[0286] The above method defines how to determine the beam of the resource for the CLI measurement based on the information for indicating the beam, so that the UE and the base station have the same understanding of the beam of the resource for the CLI measurement, improving the reliability of the communication system.

[0287] In some cases, the time domain resource of the resource for the CLI measurement (on the uplink subband) and the time domain resource of the downlink channel / downlink signal / resource for the CLI measurement (on the downlink subband) may be overlapped or be close to each other. On one hand, simultaneously receiving the resource for the CLI measurement (on the uplink subband) and the downlink channel / downlink signal / resource for the CLI measurement (on the downlink subband) may improve the efficiency of the communication system; on another hand, the UE may only receive the resource for the CLI measurement (on the uplink subband), which may enable the UE to adjust the reception parameter for the resource for the CLI measurement, improving the accuracy of the CLI measurement and thereby improving the reliability of the communication system; on yet another hand, the UE may only receive the downlink channel / downlink signal / resource for the CLI measurement (on the downlink subband), which may enable the UE to adjust the reception parameter for the downlink channel / downlink signal / resource for the CLI measurement, improving the reception quality of the downlink channel / downlink signal and thereby improving the reliability of the communication system. For example, the reception parameter (e.g., reception timing, or reception sensitivity) for the resource for the CLI measurement on the uplink subband may be different from the reception parameter (e.g., reception timing, or reception sensitivity) for the downlink channel / downlink signal / resource for the CLI measurement on the downlink subband. How (e.g., under what circumstances / conditions) the UE receives the resource for the CLI measurement (on the uplink subband) and / or receives the downlink channel / downlink signal / resource for the CLI measurement (on the downlink subband) is discussed below.

[0288] In some cases, if the UE is to receive the first resource (in the uplink subband) on the first time domain resource, and the UE is to receive the second resource (in the downlink subband) on the second time domain resource, and the first time domain resource and the second time domain resource satisfy the first condition, the UE performs one of the following operations:

[0289] ● Operation 1: receiving the first resource and / or cancelling the reception of the second resource;

[0290] ● Operation 2: receiving the second resource and / or cancelling the reception of the first resource;

[0291] ● Operation 3: receiving the first resource and receiving the second resource.

[0292] Optionally, receiving a resource may be understood as measuring the resource, or measuring on the resource. Optionally, receiving a resource may be understood as receiving on the resource. Optionally, cancelling the reception of a resource may be understood as cancelling the reception / measurement on the resource, or cancelling the reception / measurement of the resource. Optionally, cancelling the reception of a resource may be understood as receiving / measuring not on the resource, or not receiving / measuring on the resource.

[0293] Optionally, the first resource may be for the CLI measurement. Optionally, the first resource may be in the uplink subband. Optionally, the first resource may be the resource in the uplink subband. Optionally, the first resource may be the SRS resource (in the uplink subband). Optionally, the first resource may be the SRS-RSRP resource (in the uplink subband). Optionally, the first resource may be the SRS (in the uplink subband).

[0294] Optionally, the second resource may be the resource in the downlink subband. Optionally, the second resource may be in the downlink subband. Optionally, the second resource may be the resource of the downlink channel. Optionally, the second resource may be the resource of the downlink signal. Optionally, the second resource may be for the CLI measurement. Optionally, the second resource may be the CLI-RSSI resource (in downlink subband). Optionally, the second resource may be the downlink channel. Optionally, the second resource may be the downlink signal.

[0295] Optionally, the UE being to receive the first resource on the first time domain resource may refer to the UE being to receive the first resource on the first time domain resource in the uplink subband. For example, the UE is to receive the SRS-RSRP resource on the first time domain resource in the uplink subband. Optionally, the UE being to receive the first resource on the first time domain resource refers to the UE being to receive the first resource on the first time domain resource in the downlink subband. For example, the UE is to receive the CLI-RSSI resource on the first time domain resource in the downlink subband. Optionally, the UE being to receive the first resource on the first time domain resource may refer to the UE being to receive on the first time domain resource associated with the first resource. Optionally, the first time domain resource associated with the first resource may be the first time domain resource of the first resource, or the first time resource occupied by the first resource.

[0296] Optionally, the UE being to receive the second resource on the second time domain resource may refer to the UE being to receive the second resource on the second time domain resource in the downlink subband. Optionally, the UE being to receive the second resource on the second time domain resource may refer to the UE being to receive on the second time domain resource associated with the second resource. Optionally, the second time domain resource associated with the second resource may be the second time domain resource of the second resource, or the second time resource occupied by the second resource.

[0297] Optionally, the UE being to receive on the first time domain resource / the second time domain resource refers to the UE obtaining / receiving indication information / configuration information from the base station, and the indication information / configuration information indicates the UE to receive on the first time domain resource / the second time domain resource. Optionally, the UE being to receive on the first time domain resource / the second time domain resource refers to the UE obtaining / receiving indication information / configuration information from the base station, the indication information / configuration information indicates the first time domain resource / the second time domain resource and / or the first resource / the second resource. Optionally, the indication information from the base station may be obtained via detection of DCI. Optionally, the configuration information from the base station may be obtained via higher layer signaling (e.g., RRC and / or MAC-CE).

[0298] Optionally, receiving the resource for the CLI measurement on the first time domain resource may be receiving the SRS-RSRP resource on the first time domain resource, or receiving the SRS for the CLI measurement on the first time domain resource., or receiving the SRS on the first time domain resource. Optionally, receiving the resource for the CLI measurement on the second time domain resource may be receiving the CLI-RSSI resource on the second time domain resource, or measuring / obtaining the RSSI associated with CLI on the second time domain resource.

[0299] In the disclosure, the description “the UE is to receive the first resource on the first time domain resource” may be understood as “the first resource occurs in the first time domain resource” or “the reception occasion of the first resource occurs in the first time domain resource” or “the first resource is in the first time domain resource” or “the time domain resource occupied by the first resource is the first time domain resource” or “the time domain resource of the first resource is the first time domain resource” or “the reception of the first resource is in the first time domain resource indicated by the base station” or “the reception of the first resource in the first time domain resource determined based on the indication of the base station”.

[0300] In the disclosure, the description “the UE is to receive the first resource on the first time domain resource in the uplink subband” may be understood as “the first resource is in the uplink subband, and the first resource occurs in the first time domain resource” or “the first resource is in the uplink subband, and the reception occasion of the first resource occurs in the first time domain resource” or “the first resource is in the uplink subband, and the first resource is in the first time domain resource” or “the first resource is in the uplink subband, and the time domain resource occupied by the first resource is the first time domain resource” or “the first resource is in the uplink subband, and the time domain resource of the first resource is the first time domain resource”.

[0301] In the disclosure, the description “the UE is to receive the first resource on the first time domain resource in the downlink subband” may be understood as “the first resource is in the downlink subband, and the first resource occurs in the downlink subband in the first time domain resource” or “the first resource is in the downlink subband, and the reception occasion of the first resource occurs in the first time domain resource” or “the first resource is in the downlink subband, and the first resource is in the first time domain resource” or “the first resource is in the downlink subband, and the time domain resource occupied by the first resource is the first time domain resource” or “the first resource is in the downlink subband, and the time domain resource of the first resource is the first time domain resource”.

[0302] In the disclosure, the description “the UE is to receive the second resource on the second time domain resource” may be understood as “the second resource occurs in the second time domain resource” or “the reception occasion of the second resource occurs in the second time domain resource” or “the second resource is in the second time domain resource” or “the time domain resource occupied by the second resource is the second time domain resource” or “the time domain resource of the second resource is the second time domain resource” or “the reception of the second resource is in the second time domain resource” or “the reception of the second resource is in the second time domain resource indicated by the base station” or “the reception of the second resource in the second time domain resource determined based on the indication of the base station”.

[0303] In the disclosure, the description “the UE is to receive the second resource on the second time domain resource in the downlink subband” may be understood as “the second resource is in the downlink subband, and the second resource occurs in the second time domain resource” or “the second resource is in the downlink subband, and the reception occasion of the second resource occurs in the second time domain resource” or “the second resource is in the downlink subband, and the second resource is in the second time domain resource” or “the second resource is in the downlink subband, and the time domain resource occupied by the second resource is the second time domain resource” or “the second resource is in the downlink subband, and the time domain resource of the second resource is the second time domain resource”.

[0304] The first condition will be described in detail below. Optionally, the first condition includes at least one of the followings:

[0305] ● The first time domain resource and the second time domain resource are overlapped. Optionally, the overlap of the first time domain resource and the second time domain resource may be the time domain unit where the first time domain resource is located and the time domain unit where the second time domain resource is located being the same, or the overlap of the first time domain resource and the second time domain resource in at least one time domain unit, or the time domain unit included in the first time domain resource and the time domain unit included in the second time domain resource being the same, or the full overlap of the first time domain resource and the second time domain resource, or the partial overlap of the first time domain resource and the second time domain resource;

[0306] ● The time domain interval between the first time domain resource and the second time domain resource is less than or equal to a specific threshold. Optionally, the specific threshold may be indicated by the base station, determined based on the UE capability, or predefined. Optionally, the unit of the specific threshold may be a slot, a symbol, or a sample. Optionally, the value of the specific threshold may be 0, 1, 2, or 3. Optionally, the time domain interval between the first time domain resource and the second time domain resource may be the time domain offset / time domain interval between the time domain unit of the first time domain resource and the time domain unit of the second time domain resource, or the time domain offset / time domain interval between the starting time domain unit of the first time domain resource and the starting time domain unit of the second time domain resource, or the time domain offset / time domain interval between the starting time domain unit of the first time domain resource and the ending time domain unit of the second time domain resource, or the time domain offset / time domain interval between the ending time domain unit of the first time domain resource and the starting time domain unit of the second time domain resource, or the time domain offset / time domain interval between the time domain unit of the second time domain resource and the time domain unit of the first time domain resource, or the time domain offset / time domain interval between the starting time domain unit of the second time domain resource and the starting time domain unit of the first time domain resource, or the time domain offset / time domain interval between the ending time domain unit of the second time domain resource and the ending time domain unit of the first time domain resource, or the time domain offset / time domain interval between the starting time domain unit of the second time domain resource and the ending time domain unit of the first time domain resource, or the time domain offset / time domain interval between the ending time domain unit of the second time domain resource and the starting time domain unit of the first time domain resource. Since the reception timing used for the CLI measurement on the first time domain resource may be different from the reception timing used for reception on the second time domain resource, these two time domain resources need the specific time interval for protection, to avoid the degradation of reception performance caused by different reception timings, thereby improving the reliability of the communication system.

[0307] ● The first time domain resource and / or the second time domain resource are in the SBFD time domain resources. Optionally, the first time domain resource and / or the second time domain resource may be in the SBFD time domain resources means that at least one time domain unit included in the first time domain resource and / or at least one time domain unit included in the second time domain resource are in the SBFD time domain resources;

[0308] ● A time unit included in the time interval between the first time domain resource and the second time domain resource is in the SBFD time domain resources. Optionally, the time interval between the first time domain resource and the second time domain resource may be understood as the time domain resource / time domain unit between the first time domain resource and the second time domain resource. For example, when the ending symbol of the first time domain resource precedes the starting symbol of the second time domain resource, the symbol between the ending symbol of the first time domain resource and the starting symbol of the second time domain resource is in the SBFD time domain resources. For example, when the ending symbol of the second time domain resource precedes the starting symbol of the first time domain resource, the symbol between the ending symbol of the second time domain resource and the starting symbol of the first time domain resource is in the SBFD time domain resources;

[0309] ● The overlapped part of the first time domain resource and the second time domain resource is in the SBFD time domain resources. For example, the first time domain resource and the second time domain resource are overlapped on a set of time domain units, where the set of time domain units are in the SBFD time domain resources.

[0310] Generally, the complexity of the UE performing Operation 1 or Operation 2 may be different from the complexity of the UE performing Operation 3. For example, when the UE receives the first resource and the second resource simultaneously, in order to ensure the reception accuracy of the first resource and the reception accuracy of the second resource, the UE needs higher processing capability. Therefore, some UEs (e.g., high capability UEs) support Operation 3, and some UEs (e.g., low capability UEs) do not support Operation 3. In order for the base station to obtain information on whether the UE supports Operation 3, the UE may report first UE capability information. In the disclosure, the term “first UE capability information” may be used interchangeably with the term “first UE capability signaling” or “first UE capability parameter”. Optionally, the UE may report the first UE capability information / the UE capability parameter, and the UE capability signaling / the UE capability parameter is used for indicating whether the UE supports Operation 3. For example, when the value of the first UE capability information is a first value, the UE supports Operation 3; when the value of the first UE capability information is a second value, the UE does not support Operation 3. Here, the first value and the second value are different. Optionally, the UE may report first UE capability information, where the first UE capability information is used for indicating that the UE supports Operation 3. For example, when the UE reports the first UE capability information, the UE supports Operation 3. When there is no first UE capability information in the UE capability information reported by the UE, the UE does not support Operation 3. When the UE does not support Operation 3, the UE does not report the capability parameter. Optionally, UE supporting Operation 3 may be at least one of the followings:

[0311] ● The UE supports simultaneous reception of the first resource and the second resource (in the SBFD time domain resources);

[0312] ● The UE supports simultaneous reception of the first resource in the uplink subband and the second resource in the downlink subband (in the SBFD time domain resources);

[0313] ● The UE supports reception of the first resource and the second resource with time domain resource overlapped (in the SBFD time domain resources);

[0314] ● The UE supports reception of the first resource and the second resource (in the SBFD time domain resources), where the first time domain resource and the second time domain resource are overlapped;

[0315] ● The UE supports reception of the first resource in the uplink subband and the second resource in the downlink subband (in the SBFD time domain resources), where the first time domain resource and the second time domain resource are overlapped;

[0316] ● The UE supports reception of the first resource and the second resource (in the SBFD time domain resources), where the time domain interval between the first time domain resource and the second time domain resource is less than or equal to a threshold;

[0317] ● The UE supports reception of the first resource in the uplink subband and the second resource in the downlink subband (in the SBFD time domain resources), where the time domain interval between the first time domain resource and the second time domain resource is less than or equal to a threshold.

[0318] In some cases, the base station may determine whether the UE supports Operation 3 based on the first UE capability information. For the UE supporting Operation 3, the base station may indicate whether the UE performs Operation 3. Optionally, the UE may receive first indication information from the base station, where the first indication information is used for indicating whether Operation 3 is enabled, or the first indication information is used for indicating that Operation 3 is enabled, or the first indication information is used for indicating that Operation 3 is disabled. Optionally, when the first indication information indicates that Operation 3 is enabled, the UE performs Operation 3. Optionally, when the first indication information indicates that Operation 3 is disabled, the UE performs Operation 1 or Operation 2. Optionally, if the first indication information is used for indicating that Operation 3 is enabled, but the UE does not receive the first indication information, Operation 3 is disabled. Optionally, if the first indication information is used for indicating that Operation 3 is disabled, but the UE does not receive the first indication information (and the UE supports Operation 3), Operation 3 is enabled. Optionally, the first indication information may be indicated by the base station via at least one of RRC, MAC-CE, and downlink control information (DCI). Optionally, Operation 3 being enabled may refer to at least one of the followings:

[0319] ● The UE receives the first resource and the second resource simultaneously (in the SBFD time domain resources);

[0320] ● The UE receives the first resource in the uplink subband and the downlink channel / downlink signal / second resource in the downlink subband simultaneously (in the SBFD time domain resources);

[0321] ● The UE receives the first resource and the downlink channel / downlink signal / second resource with time domain resource overlapped (in the SBFD time domain resources);

[0322] ● The UE receives the first resource and the second resource (in the SBFD time domain resources), where the first time domain resource and the second time domain resource are overlapped;

[0323] ● The UE receives the first resource in the uplink subband and the second resource in the downlink subband (in the SBFD time domain resources), where the first time domain resource and the second time domain resource are overlapped;

[0324] ● The UE receives the first resource and the second resource (in the SBFD time domain resources), where the time domain interval between the first time domain resource and the second time domain resource is less than or equal to a threshold;

[0325] ● The UE receives the first resource in the uplink subband and the second resource in the downlink subband (in the SBFD time domain resources), where the time domain interval between the first time domain resource and the second time domain resource is less than or equal to a threshold.

[0326] Optionally, Operation 3 being disabled may be at least one of the followings:

[0327] ● The UE does not receive the first resource and the second resource simultaneously (in the SBFD time domain resources);

[0328] ● The UE does not receive the first resource in the uplink subband and the second resource in the downlink subband simultaneously (in the SBFD time domain resources);

[0329] ● The UE receives the first resource or the second resource with time domain resource overlapped (in the SBFD time domain resources);

[0330] ● The UE receives the first resource or the second resource (in the SBFD time domain resources), where the first time domain resource and the second time domain resource are overlapped;

[0331] ● The UE receives the first resource in the uplink subband or the second resource in the downlink subband (in the SBFD time domain resources), where the first time domain resource and the second time domain resource are overlapped;

[0332] ● The UE receives the first resource or the second resource (in the SBFD time domain resources), where the time domain interval between the first time domain resource and the second time domain resource is less than or equal to a threshold;

[0333] ● The UE receives the first resource in the uplink subband or the second resource in the downlink subband (in the SBFD time domain resources), where the time domain interval between the first time domain resource and the second time domain resource is less than or equal to a threshold.

[0334] The following discusses (in case the first condition is satisfied) under what condition, the UE (determines to perform) performs Operation 1 or Operation 2. Optionally, when a second condition is satisfied, the UE (determines to perform) performs Operation 1 or Operation 2. The second condition includes at least one of the followings:

[0335] ● The UE reports the first UE capability information, where the first UE capability information indicates that the UE does not support Operation 3;

[0336] ● The UE does not report the first UE capability information, where the first UE capability information indicates that the UE supports Operation 3;

[0337] ● The UE does not support Operation 3;

[0338] ● The UE receives the first indication information, where the first indication information indicates that Operation 3 is disabled;

[0339] ● The UE does not receive the first indication information, where the first indication information indicates that Operation 3 is enabled;

[0340] ● Operation 3 is disabled;

[0341] ● The beam of the first resource is different from the beam of the second resource. Optionally, the beam of the first resource being different from the beam of the second resource refers to the QCL parameter used for receiving the first resource being different from the QCL parameter used for receiving the second resource, or the TCI state used for receiving the first resource being different from the TCI state used for receiving the second resource, or the first resource and the second resource being not quasi co-located.

[0342] The above method defines under what condition the UE (determines to perform) performs Operation 1 or Operation 2, so that the UE and the base station have the same understanding of the UE behavior, improving the reliability of the communication system.

[0343] The following discusses (in case the first condition is satisfied, or both the first condition and the second condition are satisfied) under what condition, the UE performs one of Operation 1 and Operation 2. Optionally, when a third condition is satisfied, the UE performs Operation 1. The third condition includes at least one of the followings:

[0344] ● The first resource is aperiodic (and the second resource is a downlink signal) and the second resource is semi-persistent / periodic. Optionally, the downlink signal may be SSB and / or CSI-RS;

[0345] ● The first resource is aperiodic (and the second resource is a downlink channel) and the second resource is a downlink channel triggered by higher layer / configured by higher layer. Optionally, the downlink channel triggered by the higher layer / configured by the higher layer may be a PDSCH without a corresponding PDCCH, or the downlink channel triggered by the higher layer / configured by the higher layer may be a PDSCH of the corresponding configuration grant, or the downlink channel triggered by the higher layer / configured by the higher layer may be an SPS PDSCH. Optionally, the downlink channel triggered by the higher layer / configured by the higher layer may be a PDCCH;

[0346] ● The first resource is aperiodic and the second resource is semi-persistent / periodic;

[0347] ● The time domain behavior of the first resource is different from the time domain behavior of the second resource. Optionally, the time domain behavior may be one of aperiodic, semi-persistent, and periodic. For example, in case where the first resource is periodic and the second resource is aperiodic, the time domain behavior of the first resource and the time domain behavior of the second resource are different. For example, in case where the first resource is periodic and the downlink signal is also periodic, the time domain behavior of the first resource and the time domain behavior of the downlink signal are the same.

[0348] Optionally, when a fourth condition is satisfied, the UE performs Operation 2. The fourth condition includes at least one of the followings:

[0349] ● The first resource is periodic / semi-persistent (and the second resource is a downlink signal) and the second resource is aperiodic. Optionally, the downlink signal may be a CSI-RS;

[0350] ● The first resource is periodic / semi-persistent (and the second resource is a downlink channel) and the second resource is a downlink channel triggered by DCI / scheduled by DCI. Optionally, the downlink channel triggered by DCI / scheduled by DCI may be a PDSCH with a corresponding PDCCH, or a PDSCH determined based on detection of DCI.

[0351] ● The first resource is periodic / semi-persistent and the second resource is aperiodic;

[0352] ● The time domain behavior of the first resource is different from the time domain behavior of the second resource. Optionally, the time domain behavior may be one of aperiodic, semi-persistent, and periodic. For example, in case where the first resource is periodic and the second resource is aperiodic, the time domain behavior of the first resource and the time domain behavior of the second resource are different. For example, in case where the first resource is periodic and the downlink signal is also periodic, the time domain behavior of the first resource and the time domain behavior of the downlink signal are the same.

[0353] The above method defines under what condition the UE performs one of Operation 1 and Operation 2, so that the UE and the base station have the same understanding of the UE behavior, improving the reliability of the communication system.

[0354] The following discusses (in case that the first condition is satisfied) under what condition, the UE performs Operation 3. Optionally, when a fifth condition is satisfied, the UE performs Operation 3. The fifth condition includes at least one of the followings:

[0355] ● The UE reports the first UE capability information, where the first UE capability information indicates that the UE supports Operation 3;

[0356] ● The UE does not report the first UE capability information, where the first UE capability information indicates that the UE does not support Operation 3;

[0357] ● The UE supports Operation 3;

[0358] ● The UE receives the first indication information, where the first indication information indicates that Operation 3 is enabled;

[0359] ● The UE does not receive the first indication information, where the first indication information indicates that Operation 3 is disabled;

[0360] ● Operation 3 is enabled;

[0361] ● The beam of the first resource is the same as the beam of the second resource. Optionally, the beam of the first resource being the same as the beam of the second resource refers to the QCL parameter used for receiving the first resource being the same as the QCL parameter used for receiving the second resource, or the TCI state used for receiving the first resource being the same as the TCI state used for receiving the second resource, or the first resource and the second resource being quasi co-located.

[0362] The above method defines under what condition the UE performs Operation 3, so that the UE and the base station have the same understanding of the UE behavior, improving the reliability of the communication system.

[0363] Optionally, when the UE performs Operation 3 (or for Operation 3), the beam of the first resource is the same as the beam of the downlink channel / downlink signal / second resource. Optionally, the beam of the first resource being the same as the beam of the downlink channel / downlink signal / second resource refers to the QCL parameter used for receiving the first resource being the same as the QCL parameter used for receiving the downlink channel / downlink signal / second resource, or the TCI state used for receiving the first resource being the same as the TCI state used for receiving the downlink channel / downlink signal / second resource, or the first resource and the downlink channel / downlink signal / second resource being quasi co-located.

[0364] Optionally, when the UE performs Operation 3 (or for Operation 3), the beam of the first resource is determined based on the beam of the downlink channel / downlink signal / second resource. Optionally, the beam of the first resource being determined based on the beam of the downlink channel / downlink signal / second resource refers to the TCI state of the first resource being determined based on the TCI state of the downlink channel / downlink signal / second resource, or the QCL parameter of the first resource being determined based on the QCL parameter of the downlink channel / downlink signal / second resource. For example, the TCI state of the first resource is determined by the same TCI state as the TCI state of the downlink channel / downlink signal / second resource. For example, the QCL parameter of the first resource is determined by the same QCL parameter as the QCL parameter of the downlink channel / downlink signal / second resource.

[0365] Optionally, when the UE performs Operation 3 (or for Operation 3), the beam of the downlink channel / downlink signal / second resource is determined based on the beam of the first resource. Optionally, the beam of the downlink channel / downlink signal / second resource being determined based on the beam of the first resource refers to the TCI state of the downlink channel / downlink signal / second resource being determined based on the TCI state of the first resource. or the QCL parameter of the downlink channel / downlink signal / second resource being determined based on the QCL parameter of the first resource. For example, the TCI state of the downlink channel / downlink signal / second resource is determined by the same TCI state as the TCI state of the first resource. For example, the QCL parameter of the downlink channel / downlink signal / second resource is determined by the same QCL parameter as the QCL parameter of the first resource.

[0366] The above method defines the beam using method when the UE performs Operation 3, so that the UE and the base station have the same understanding of the associated beam, improving the reliability of the communication system.

[0367] FIG. 4B illustrates a method 420 performed by a user equipment (UE) according to various embodiments of the disclosure. The method 420 includes: at 421, receiving, by the UE, configuration information for the SBFD from the base station, wherein the configuration information for the SBFD indicates an uplink subband and a downlink subband and time domain resources for the SBFD; at 422, if the UE is to receive a first resource (in the uplink subband) on a first time domain resource, performing, by the UE, at least one of the following operations:

[0368] ● Operation 4: the UE determines / assumes that the time domain unit associated with the first time domain resource is a downlink time domain unit; and / or (on the first time domain resource) the UE receives based on the assumption that the time domain unit associated with the first time domain resource is a downlink time domain unit, and / or the UE receives on the first time domain resource;

[0369] ● Operation 5: the UE receives the first resource (in the uplink subband), or the UE receives in the uplink subband.

[0370] Refer above for description of the first time domain resource. Refer above for description of the first resource. Optionally, the UE determining / assuming that the time domain unit associated with the first time domain resource is a downlink time domain unit refers to the UE determining / understanding the time domain unit associated with the first time domain resource as a downlink time domain unit. Optionally, the UE receiving in the uplink subband refers to the UE receiving in the intersection of the uplink subband and the downlink BWP. Optionally, the UE receiving in the uplink subband refers to the UE receiving the resource for the CLI measurement in the uplink subband, or the UE receiving the SRS-RSRP resource in the uplink subband. Optionally, the first time domain resource is in the SBFD time domain resources. Optionally, the time domain unit associated with the first time domain resource may be at least one of the followings:

[0371] ● A symbol where the first time domain resource is located;

[0372] ● A slot where the first time domain resource is located;

[0373] ● Xsym(Xsym≥1) symbols before the first time domain resource;

[0374] ● Ysym(Ysym≥1) symbols after the first time domain resource.

[0375] ● Xslot(Xslot≥1) slots before the first time domain resource;

[0376] ● Yslot(Yslot≥1) slots after the first time domain resource;

[0377] ● A time domain unit in the SBFD time domain resources.

[0378] Optionally, the Xsymsymbols before the first time domain resource may be the the Xsymsymbols before the first symbol of the first time domain resource. Xsymrepresents the number of symbols. Optionally, the Xsymsymbols may be consecutive Xsymsymbols in time domain. Optionally, Xsymmay be indicated by the base station. For example, Xsymmay be indicated by at least one of DCI, MAC-CE, and RRC. Optionally, Xsymmay be predefined. For example, Xsymmay be one of 1, 2, 3, 4, 7, 14. Optionally, Xsymmay be determined based on the UE capability. For example, Xsymmay be indicated by the UE capability signaling reported by the UE.

[0379] Optionally, the Ysymsymbols after the first time domain resource may be the Ysymsymbols after the first symbol of the first time domain resource. Ysymrepresents the number of symbols. Optionally, the Ysymsymbols may be consecutive Ysymsymbols in time domain. Optionally, Ysymmay be indicated by the base station. For example, Ysymmay be indicated by at least one of DCI, MAC-CE, and RRC. Optionally, Ysymmay be predefined. For example, Ysymmay be one of 1, 2, 3, 4, 7, 14. Optionally, Ysymmay be determined based on the UE capability. For example, Ysymmay be indicated by the UE capability signaling reported by the UE.

[0380] Optionally, the Xslotslots before the first time domain resource may be the Xslotslots before the slot where the first time domain resource is located (or the first slot where the first time domain resource is located). Xslotrepresents the number of slots. Optionally, the Xslotslots may be consecutive Xsymslots in time domain. Optionally, Xslotmay be indicated by the base station. For example, Xslotmay be indicated by at least one of DCI, MAC-CE, and RRC. Optionally, Xslotmay be predefined. For example, Xslotmay be one of 1, 2, 3, 4, 10, 20. Optionally, Xslotmay be determined based on the UE capability. For example, Xslotmay be indicated by the UE capability signaling reported by the UE.

[0381] Optionally, the Yslotslots after the first time domain resource may be the Yslotslots after the slot where the first time domain resource is located (or the last slot where the first time domain resource is located). Yslotrepresents the number of slots. Optionally, the Yslotslots may be consecutive Yslotslots in time domain. Optionally, Yslotmay be indicated by the base station. For example, Yslotmay be indicated by at least one of DCI, MAC-CE, and RRC. Optionally, Yslotmay be predefined. For example, Yslotmay be one of 1, 2, 3, 4, 10, 20. Optionally, Yslotmay be determined based on the UE capability. For example, Yslotmay be indicated by the UE capability signaling reported by the UE.

[0382] Optionally, the UE receiving based on the assumption that the time domain unit associated with the first time domain resource is a downlink time domain unit refers to the UE receiving based on the indication of the downlink time domain unit, and / or the UE ignoring the SBFD configuration information, and / or the UE not receiving based on the SBFD configuration information on the time domain unit associated with the first time domain resource.

[0383] Optionally, (on the first time domain resource) the UE receiving based on the assumption that the time domain unit associated with the first time domain resource is a downlink time domain unit refers to (on the first time domain resource) the UE receiving in the downlink BWP based on the assumption that the time domain unit associated with the first time domain resource is a downlink time domain unit, or (on the first time domain resource) the UE receiving in the uplink subband based on the assumption that the time domain unit associated with the first time domain resource is a downlink time domain unit.

[0384] Optionally, the downlink time domain unit may be indicated by the base station. Optionally, the downlink time domain unit may be indicated by RRC information. Optionally, the downlink time domain unit may be a downlink symbol and / or a downlink slot. Optionally, the UE may obtain / receive information for TDD uplink / downlink configuration. Optionally, the RRC information may be for TDD UL / DL configuration. Optionally, the downlink time domain unit is determined based on the information for TDD uplink / downlink configuration. For example, the RRC information may be a cell-specific TDD uplink / downlink configuration (e.g., tdd-UL-DL-ConfigurationCommon) and / or a UE-specific TDD uplink / downlink configuration (e.g., tdd-UL-DL-ConfigurationDedicated).

[0385] In some cases, the complexity of the UE performing Operation 4 may be different from the complexity of the UE performing Operation 5. For example, in order to ensure that when the UE receives the first resource, it may also receive in a specific frequency domain resource (for example, the downlink BWP, or the downlink subband, or the uplink subband), the UE needs higher processing capability. Therefore, it is possible that a part of the UEs (e.g., high capability UEs) support Operation 4 and a part of the UEs (e.g., low capability UEs) do not support Operation 4 (e.g., perform Operation 5). In order for the base station to obtain information on whether the UE supports Operation 4, the UE may report second UE capability information. In the disclosure, the term “second UE capability information” may be used interchangeably with the term “second UE capability signaling” or “second UE capability parameter”. Optionally, the UE may report the second UE capability information, and the UE capability signaling / UE capability parameter is used for indicating whether Operation 4 is supported. For example, when the value of the second UE capability information is a third value, the UE supports Operation 4; when the value of the first UE capability information is a fourth value, the UE does not support Operation 4. Here, the third value and the fourth value are different. Optionally, the UE may report the second UE capability information, where the second UE capability information is used for indicating that the UE supports Operation 4. For example, when the UE reports the second UE capability information, the UE supports Operation 4. When there is no second UE capability information in the UE capability information reported by the UE, the UE does not support Operation 4. When the UE does not support Operation 4, the UE does not report the capability parameter. Optionally, UE supporting Operation 4 may be at least one of the followings:

[0386] ● The UE supports that the time domain unit in the SBFD time domain resources is determined as a downlink time domain unit;

[0387] ● The UE supports that the time domain unit associated with the first time domain resource is determined as a downlink time domain unit;

[0388] ● The UE supports that the time domain unit associated with the first time domain resource is determined as a downlink time domain unit;

[0389] ● The UE supports CLI measurement in the uplink subband;

[0390] ● The UE supports measuring the resource for the CLI measurement in the uplink subband;

[0391] ● The UE supports reception on the time domain unit associated with the first time domain resource;

[0392] ● The UE supports reception in the downlink BWP on the time domain unit associated with the first time domain resource. Optionally, the first resource is in the uplink subband (or the first resource is the SRS-RSRP resource);

[0393] ● The UE supports reception in the downlink BWP and / or in the downlink subband on the time domain unit associated with the first time domain resource. Optionally, the first resource is in the uplink subband (or the first resource is the SRS-RSRP resource).

[0394] Optionally, “determined” may be “assumed” or “modified” or “updated”.

[0395] Generally, the base station may determine whether the UE supports Operation 4 based on the second UE capability information. For the UE supporting Operation 4, the base station may indicate whether the UE performs Operation 4. The UE may receive the second indication information from the base station, where the second indication information is used for indicating whether Operation 4 is enabled, or the second indication information is used for indicating that Operation 4 is enabled, or the second indication information is used for indicating that Operation 4 is disabled. Optionally, when the second indication information indicates that Operation 4 is enabled, the UE performs Operation 4 (in case described above). Optionally, when the second indication information indicates that Operation 4 is disabled, the UE performs Operation 5 (in case described above). Optionally, if the second indication information is used for indicating that Operation 4 is enabled, and the UE does not receive the second indication information, Operation 4 is disabled. Optionally, if the second indication information is used for indicating that Operation 4 is disabled, and the UE does not receive the second indication information (and the UE supports Operation 4), Operation 4 is enabled. Optionally, the second indication information may be indicated by the base station via at least one of RRC, MAC-CE, and DCI. Optionally, Operation 4 being enabled may be at least one of the followings:

[0396] ● The time domain unit associated with the first time domain resource is determined as a downlink time domain unit;

[0397] ● The UE receives in the time domain unit associated with the first time domain resource;

[0398] ● The UE receives in the downlink BWP in the time domain unit associated with the first time domain resource; optionally, the first resource is in the uplink subband (or the first resource is the SRS-RSRP resource);

[0399] ● The UE receives in the downlink BWP and / or in the downlink subband in the time domain unit associated with the first time domain resource. Optionally, the first resource is in the uplink subband (or the first resource is the SRS-RSRP resource).

[0400] Optionally, Operation 4 being disabled may be at least one of the followings:

[0401] ● The time domain unit associated with the first time domain resource is not determined as a downlink time domain unit;

[0402] ● The time domain unit associated with the first time domain resource is the SBFD time domain resource;

[0403] ● The UE receives in the time domain unit associated with the first time domain resource;

[0404] ● The UE receives in the uplink subband in the time domain unit associated with the first time domain resource;

[0405] ● The UE receives the first resource in the uplink subband in the time domain unit associated with the first time domain resource.

[0406] In some cases, if the UE is to receive the first resource (in the uplink subband) on the first time domain resource, and a sixth condition is satisfied, the UE performs Operation 4 and / or Operation 5. Optionally, the sixth condition may include at least one of the followings:

[0407] ● The UE reports the second UE capability information; where the second UE capability information indicates that the UE supports Operation 4;

[0408] ● The UE does not report the second UE capability information; where the first UE capability information indicates that the UE does not support Operation 4;

[0409] ● The UE supports Operation 4;

[0410] ● The UE receives the second indication information, where the second indication information indicates that Operation 4 is enabled;

[0411] ● The UE does not receive the second indication information, where the second indication information indicates that Operation 4 is disabled;

[0412] ● Operation 4 enabled;

[0413] ● The first resource is semi-persistent or periodic, or the first resource is triggered by higher layer signaling (e.g. RRC and / or MAC-CE).

[0414] Here, Operation 4 is performed only if the first resource is semi-persistent or periodic, avoiding the UE performing Operation 4 for the first resource triggered by dynamic signaling (e.g., DCI). Since the time interval from the transmission of the dynamic signaling to the reception of the dynamic signaling by the UE is small, the UE may not be able to complete Operation 4. Therefore, this method may avoid such situation and improve the reliability of the communication system.

[0415] In some cases, if the UE is to receive the first resource (in the uplink subband) on the first time domain resource, and a seventh condition is satisfied, the UE performs Operation 5. Optionally, the seventh condition may include at least one of the followings:

[0416] ● The UE reports the second UE capability information; where the second UE capability information indicates that the UE does not support Operation 4;

[0417] ● The UE does not report the second UE capability information; where the first UE capability information indicates that the UE supports Operation 4;

[0418] ● The UE does not support Operation 4;

[0419] ● The UE receives the second indication information, where the second indication information indicates that Operation 4 is disabled;

[0420] ● The UE does not receive the second indication information, where the second indication information indicates that Operation 4 is enabled;

[0421] ● Operation 4 is disabled;

[0422] ● The first resource is aperiodic, or the first resource is triggered by DCI.

[0423] Different from Operation 5, the UE performing Operation 4 may not only receive / measure the first resource, but also receive other downlink signal / downlink channel on specific frequency domain resource on the time domain unit associated with the first resource. The above method defines under what situation the UE performs Operation 4 or Operation 5, so that the UE and the base station have the same understanding, improving the efficiency of resource utilization of the communication system.

[0424] In some cases, a UE may transmit an SRS to facilitate CLI measurement by other UEs. In order to facilitate other UEs to receive on the downlink subband in the SBFD time domain resources, the UE may transmit the SRS in the downlink subband accordingly. The time domain resource for SRS transmission (on the downlink subband) and the time domain resource of the uplink channel / uplink signal (on the uplink subband) may be overlapped or be close to each other. On one hand, simultaneously transmitting the SRS resource (on the downlink subband) and the uplink channel / uplink signal (on the uplink subband) may improve the efficiency of the communication system; on another hand, the UE may only transmit the SRS resource (on the downlink subband), so that the UE adjusts the transmission parameter for the SRS resource, improving the performance of other UEs for the CLI measurement and thereby improving the reliability of the communication system; on yet another hand, the UE may only transmit the uplink channel / uplink signal (on the uplink subband), so that the UE adjusts the transmission parameter for the uplink channel / uplink signal, improving the transmission quality of the uplink channel / uplink signal and thereby improving the reliability of the communication system. For example, the transmission parameter (e.g., transmission timing, or transmission power) for the resource for SRS transmission on the downlink subband may be different from the transmission parameter (e.g., transmission timing, or transmission power) for the uplink channel / uplink signal on the uplink subband. timing, or transmit power). How (e.g., under what circumstances / conditions) the UE transmits the SRS (for the CLI measurement) (on the downlink subband) and / or transmits the uplink channel / uplink signal (on the uplink subband) is discussed below.

[0425] FIG. 4C illustrates a method 430 performed by a user equipment (UE) according to various embodiments of the disclosure. The method 430 includes: at 431, receiving, by the UE, configuration information for the SBFD from a base station, wherein the configuration information for the SBFD indicates an uplink suabband and a downlink subband and time domain resources for the SBFD; at 432, if the UE is to transmit a third resource (in the downlink subband) on a third time domain resource, and the UE is to transmit a fourth resource (in the uplink subband) on a fourth time domain resource, and an eighth condition is satisfied (the third time domain resource and the fourth time domain resource satisfy the eighth condition), performing, by the UE, one of the following operations:

[0426] ● Operation 6: transmitting the third resource, and / or cancelling the transmission of the fourth resource;

[0427] ● Operation 7: transmitting the fourth resource, and / or cancelling the transmission of the third resource;

[0428] ● Operation 8: transmitting the third resource, and transmitting the fourth resource.

[0429] Optionally, transmitting a resource may be understood as transmitting on the resource. Optionally, cancelling the transmission of a resource may be understood as cancelling the transmission on the resource, or cancelling the transmission of the resource. Optionally, cancelling the transmission of a resource may be understood as not transmitting on the resource, or not transmitting on the resource.

[0430] Optionally, the third resource may be for the CLI measurement. Optionally, the third resource may be in the downlink subband. Optionally, the third resource may be an uplink channel / uplink signal. The third resource may be an uplink channel / uplink signal (in the downlink subband). Optionally, the third resource may be a resource in the downlink subband. Optionally, the third resource may be an SRS resource (in the downlink subband). Optionally, the third resource may be an SRS (in the downlink subband).

[0431] Optionally, the fourth resource may be a resource in the uplink subband. Optionally, the fourth resource may be in the uplink subband. Optionally, the fourth resource may be an uplink channel / uplink signal. Optionally, the fourth resource may be a resource of an uplink channel / uplink signal. Optionally, the fourth resource may be for the CLI measurement. Optionally, the fourth resource may be an SRS resource (in the uplink subband). Optionally, the fourth resource may be an SRS (in the uplink subband).

[0432] Optionally, the UE being to transmit the third resource on the third time domain resource may refer to the UE being to transmit the third resource on the third time domain resource in the downlink subband. For example, the UE is to transmit the SRS on the third time domain resource in the downlink subband. Optionally, the UE being to transmit the third resource on the third time domain resource refers to the UE being to transmit the third resource on the third time domain resource in the uplink subband. For example, the UE is to transmit the SRS on the third time domain resource in the uplink subband. Optionally, the UE being to transmit the third resource on the third time domain resource may refer to the UE being to transmit on the third time domain resource associated with the third resource. Optionally, the third time domain resource associated with the third resource may be the third time domain resource of the third resource, or the third time resource occupied by the third resource.

[0433] Optionally, the UE being to transmit the fourth resource on the fourth time domain resource may refer to the UE being to transmit the fourth resource on the fourth time domain resource in the uplink subband. Optionally, the UE being to transmit the fourth resource on the fourth time domain resource may refer to the UE being to transmit on the fourth time domain resource associated with the fourth resource. Optionally, the fourth time domain resource associated with the fourth resource may be the fourth time domain resource of the fourth resource, or the fourth time resource occupied by the fourth resource.

[0434] Optionally, the UE being to transmit on the third time domain resource / fourth time domain resource refers to the UE obtaining / receiving indication information / configuration information from the base station, and the indication information / configuration information indicates the UE to transmit on the third time domain resource / the fourth time domain resource. Optionally, the indication information from the base station may be obtained through detection of DCI. Optionally, the UE being to transmit on the third time domain resource / the fourth time domain resource refers to the UE obtaining / receiving indication information / configuration information from the base station, and the indication information / configuration information indicates the third time domain resource / the fourth time domain resource and / or the third resource / the fourth resource. Optionally, the configuration information from the base station may be obtained via higher layer signaling (e.g., RRC and / or MAC-CE).

[0435] In the disclosure, the description “the UE is to transmit the third resource on the third time domain resource” may be understood as “the third resource occurs in the third time domain resource” or “the transmission occasion of the third resource occurs in the third time domain resource” or “the third resource is in the third time domain resource” or “the time domain resource occupied by the third resource is the third time domain resource” or “the time domain resource of the third resource is the third time domain resource” or “the transmission of the third resource is in the third time domain resource” or “the transmission of the third resource is in the third time domain resource indicated by the base station” or “the transmission of the third resource is in the third time domain resource determined based on the indication of the base station”.

[0436] In the disclosure, the description “the UE is to transmit the third resource on the third time domain resource in the downlink subband” may be understood as “the third resource is in the downlink subband, and the third resource occurs in the third time domain resource” or “the third resource is in the downlink subband, and the transmission occasion of the third resource occurs in the third time domain resource” or “the third resource is in the downlink subband, and the third resource is in the third time domain resource” or “the third resource is in the downlink subband, and the time domain resource occupied by the third resource is the third time domain resource” or “the third resource is in the downlink subband, and the time domain resource of the third resource is the third time domain resource”.

[0437] In the disclosure, the description “the UE is to transmit the third resource on the third time domain resource in the uplink subband” may be understood as “the third resource is in the uplink subband, and the third resource occurs in the uplink subband in the third time domain resource” or “the third resource is in the uplink subband, and the transmission occasion of the third resource occurs in the third time domain resource” or “the third resource is in the uplink subband, and the third resource is in the third time domain resource” or “the third resource is in the uplink subband, and the time domain resource occupied by the third resource is the third time domain resource” or “the third resource is in the uplink subband, and the time domain resource of the third resource is the third time domain resource”.

[0438] In the disclosure, the description “the UE is to transmit the fourth resource on the fourth time domain resource” may be understood as “the fourth resource occurs in the fourth time domain resource” or “the transmission occasion of the fourth resource occurs in the fourth time domain resource” or “the fourth resource is in the fourth time domain resource” or “the time domain resource occupied by the fourth resource is the fourth time domain resource” or “the time domain resource of the fourth resource is the fourth time domain resource” or “the transmission of the fourth resource is in the second time domain resource” or “the transmission of the fourth resource is in the fourth time domain resource indicated by the base station” or “the transmission of the fourth resource is in the fourth time domain resource determined based on the indication of the base station”.

[0439] In the disclosure, the description “the UE is to transmit the fourth resource on the fourth time domain resource in the uplink subband” may be understood as “the fourth resource is in the uplink subband, and the fourth resource occurs in the fourth time domain resource” or “the fourth resource is in the uplink subband, and the transmission occasion of the fourth resource occurs in the fourth time domain resource” or “the fourth resource is in the uplink subband, and the fourth resource is in the fourth time domain resource” or “the fourth resource is in the uplink subband, and the time domain resource occupied by the fourth resource is the fourth time domain resource” or “the fourth resource is in the uplink subband, and the time domain resource of the fourth resource is the fourth time domain resource”.

[0440] The eighth condition will be described in detail below. Optionally, the eighth condition includes at least one of the followings:

[0441] ● The third time domain resource and the fourth time domain resource are overlapped. Optionally, the overlap of the third time domain resource and the fourth time domain resource may be the time domain unit where the third time domain resource is located and the time domain unit where the fourth time domain resource is located being the same, or the overlap of the third time domain resource and the fourth time domain resource in at least one time domain unit, or the time domain unit included in the third time domain resource and the time domain unit included in the fourth time domain resource being the same, or the full overlap of the third time domain resource and the fourth time domain resource, or the partial overlap of the third time domain resource and the fourth time domain resource;

[0442] ● The time domain interval between the third time domain resource and the fourth time domain resource is less than or equal to a specific threshold. Optionally, the specific threshold may be indicated by the base station, determined based on the UE capability, or predefined. Optionally, the unit of the specific threshold may be a slot, a symbol, or a sample. Optionally, the value of the specific threshold may be 0, 1, 2, or 3. Optionally, the time domain interval between the third time domain resource and the fourth time domain resource may be the time domain offset / time domain interval between the time domain unit of the third time domain resource and the time domain unit of the fourth time domain resource, or the time domain offset / time domain interval between the starting time domain unit of the third time domain resource and the starting time domain unit of the fourth time domain resource, or the time domain offset / time domain interval between the starting time domain unit of the third time domain resource and the ending time domain unit of the fourth time domain resource, or the time domain offset / time domain interval between the ending time domain unit of the third time domain resource and the starting time domain unit of the fourth time domain resource, or the time domain offset / time domain interval between the time domain unit of the fourth time domain resource and the time domain unit of the third time domain resource, or the time domain offset / time domain interval between the starting time domain unit of the fourth time domain resource and the starting time domain unit of the third time domain resource, or the time domain offset / time domain interval between the ending time domain unit of the fourth time domain resource and the ending time domain unit of the third time domain resource, or the time domain offset / time domain interval between the starting time domain unit of the fourth time domain resource and the ending time domain unit of the third time domain resource, or the time domain offset / time domain interval between the ending time domain unit of the fourth time domain resource and the starting time domain unit of the third time domain resource. Since the reception timing used for transmission on the third time domain resource may be different from the timing used for transmission on the fourth time domain resource, these two time domain resources need the specific time interval for protection to avoid degradation of transmission performance due to different timings, thereby improving the reliability of the communication system.

[0443] ● The third time domain resource and / or the fourth time domain resource are in the SBFD time domain resources. Optionally, the third time domain resource and / or the fourth time domain resource may be in the SBFD time domain resources such that at least one time domain unit included in the third time domain resource and / or at least one time domain unit included in the fourth time domain resource is in the SBFD time domain resources;

[0444] ● The time unit included in the time interval between the third time domain resource and the fourth time domain resource is in the SBFD time domain resources. Optionally, the time interval between the third time domain resource and the fourth time domain resource may be understood as the time domain resource / time domain unit between the third time domain resource and the fourth time domain resource. For example, when the ending symbol of the third time domain resource precedes the starting symbol of the fourth time domain resource, the symbol between the ending symbol of the third time domain resource and the starting symbol of the fourth time domain resource is in the SBFD time domain resources. For example, when the ending symbol of the fourth time domain resource precedes the starting symbol of the third time domain resource, the symbol between the ending symbol of the fourth time domain resource and the starting symbol of the third time domain resource is in the SBFD time domain resources;

[0445] ● The overlapped part of the third time domain resource and the fourth time domain resource is in the SBFD time domain resources. For example, the third time domain resource and the fourth time domain resource are overlapped on a set of time domain units, where the set of time domain units are in the SBFD time domain resources.

[0446] Generally, the complexity of the UE performing Operation 6 or Operation 7 may be different from the complexity of the UE performing Operation 8. For example, when the UE transmits the third resource and the fourth resource simultaneously, in order to ensure the transmission accuracy of the third resource and the transmission accuracy of the fourth resource, the UE needs higher processing capability. Therefore, a part of the UEs (e.g., high capability UEs) support Operation 8 and a part of the UEs (e.g., low capability UEs) do not support Operation 8. In order for the base station to obtain information on whether the UE supports Operation 8, the UE may report third UE capability information. In the disclosure, the term “third UE capability information” may be used interchangeably with the term “third UE capability signaling” or “third UE capability parameter”. Optionally, the UE may report the third UE capability information / UE capability parameter, and the UE capability signaling / UE capability parameter is used for indicating whether the UE supports Operation 8. For example, when the value of the third UE capability information is a fifth value, the UE supports Operation 8; when the value of the third UE capability information is a sixth value, the UE does not support Operation 8. Here, the fifth value and the sixth value are different. Optionally, the UE may report the third UE capability information, where the third UE capability information is used for indicating that the UE supports Operation 8. For example, when the UE reports the third UE capability information, the UE supports Operation 8. When there is no third UE capability information in the UE capability information reported by the UE, the UE does not support Operation 8. When the UE does not support Operation 8, the UE does not report the capability parameter. Optionally, the UE supporting Operation 8 may be at least one of the followings:

[0447] ● The UE supports transmitting the third resource and the fourth resource simultaneously (in the SBFD time domain resources);

[0448] ● The UE supports transmitting the third resource in the downlink subband and the fourth resource in the uplink subband simultaneously (in the SBFD time domain resources);

[0449] ● The UE supports transmitting the third resource and the fourth resource with time domain resource overlapped (in the SBFD time domain resources);

[0450] ● The UE supports transmitting the third resource and the fourth resource (in the SBFD time domain resources), where the third time domain resource and the fourth time domain resource are overlapped;

[0451] ● The UE supports transmitting the third resource in the downlink subband and the fourth resource in the uplink subband (in the SBFD time domain resources), where the third time domain resource and the fourth time domain resource are overlapped;

[0452] ● The UE supports transmitting the third resource and the fourth resource (in the SBFD time domain resources), where the time domain interval between the third time domain resource and the fourth time domain resource is less than or equal to a threshold;

[0453] ● The UE supports transmitting the third resource in the downlink subband and the fourth resource in the uplink subband (in the SBFD time domain resources), where the time domain interval between the third time domain resource and the fourth time domain resource is less than or equal to a threshold.

[0454] In some cases, the base station may determine whether the UE supports Operation 8 based on the third UE capability information. For the UE supporting Operation 8, the base station may indicate whether the UE performs Operation 8. Optionally, the UE may receive third indication information from the base station, where the third indication information is used for indicating whether Operation 8 is enabled, or the third indication information is used for indicating that Operation 8 is enabled, or the third indication information is used for indicating that Operation 8 is disabled. Optionally, when the third indication information indicates that Operation 8 is enabled, the UE performs Operation 8. Optionally, when the third indication information indicates that Operation 8 is disabled, the UE performs Operation 6 or Operation 7. Optionally, if the third indication information is used for indicating that Operation 8 is enabled, but the UE does not receive the third indication information, Operation 8 is disabled. Optionally, if the third indication information is used for indicating that Operation 8 is disabled, but the UE does not receive the third indication information (and the UE supports Operation 8), Operation 8 is enabled. Optionally, the third indication information may be indicated by the base station via at least one of RRC, MAC-CE, and DCI. Optionally, Operation 8 being enabled may refer to at least one of the followings:

[0455] ● The UE transmits the third resource and the fourth resource simultaneously (in the SBFD time domain resources);

[0456] ● The UE transmits the third resource in the downlink subband and the fourth resource in the uplink subband simultaneously (in the SBFD time domain resources);

[0457] ● The UE transmits the third resource and the fourth resource with time domain resource overlapped (in the SBFD time domain resources);

[0458] ● The UE transmits the third resource and the fourth resource (in the SBFD time domain resources), where the third time domain resource and the fourth time domain resource are overlapped;

[0459] ● The UE transmits the third resource in the downlink subband and the fourth resource in the uplink subband (in the SBFD time domain resources), where the third time domain resource and the fourth time domain resource are overlapped;

[0460] ● The UE transmits the third resource and the fourth resource (in the SBFD time domain resources), where the time domain interval between the third time domain resource and the fourth time domain resource is less than or equal to a threshold;

[0461] ● The UE transmits the third resource in the downlink subband and the fourth resource in the uplink subband (in the SBFD time domain resources), where the time domain interval between the third time domain resource and the fourth time domain resource is less than or equal to a threshold.

[0462] Optionally, Operation 8 being disabled may be at least one of the followings:

[0463] ● The UE does not transmit the third resource and the fourth resource simultaneously (in the SBFD time domain resources);

[0464] ● The UE does not transmit the third resource in the downlink subband and the fourth resource in the uplink subband simultaneously (in the SBFD time domain resources);

[0465] ● The UE transmits the third resource or the fourth resource whit time domain resource overlapped (in the SBFD time domain resources);

[0466] ● The UE transmits the third resource or the fourth resource (in the SBFD time domain resources), where the third time domain resource and the fourth time domain resource are overlapped;

[0467] ● The UE transmits the third resource in the downlink subband or the fourth resource in the uplink subband (in the SBFD time domain resources), where the third time domain resource and the fourth time domain resource are overlapped;

[0468] ● The UE transmits the third resource or the fourth resource (in the SBFD time domain resources), where the time domain interval between the third time domain resource and the fourth time domain resource is less than or equal to a threshold;

[0469] ● The UE transmits the third resource in the downlink subband or the fourth resource in the uplink subband (in the SBFD time domain resources), where the time domain interval between the third time domain resource and the fourth time domain resource is less than or equal to a threshold.

[0470] The following discusses (in case that the eighth condition is satisfied) under what condition, the UE (determines to perform) performs Operation 6 or Operation 7. Optionally, when a ninth condition is satisfied, the UE (determines to perform) performs Operation 6 or Operation 7. The ninth condition includes at least one of the followings:

[0471] ● The UE reports the third UE capability information, where the third UE capability information indicates that the UE does not support Operation 8;

[0472] ● The UE does not report the third UE capability information, where the third UE capability information indicates that the UE supports Operation 8;

[0473] ● The UE does not support Operation 8;

[0474] ● The UE receives the third indication information, where the third indication information indicates that Operation 8 is disabled;

[0475] ● The UE does not receive the third indication information, where the third indication information indicates that Operation 8 is enabled;

[0476] ● Operation 8 is disabled;

[0477] ● The beam of the third resource is different from the beam of the fourth resource. Optionally, the beam of the third resource being different from the beam of the fourth resource refers to the spatial domain filter used for transmitting the third resource being different from the spatial domain filter used for transmitting the fourth resource, or the (uplink) TCI state used for transmitting the third resource being different from the (uplink) TCI state used for transmitting the fourth resource.

[0478] The above method defines under what condition the UE (determines to perform) performs Operation 6 or Operation 7, so that the UE and the base station have the same understanding of the UE behavior, improving the reliability of the communication system.

[0479] The following discusses (in case where the eighth condition is satisfied, or both the eighth condition and the ninth condition are satisfied) under what condition, the UE performs one of Operation 6 and Operation 7. Optionally, when a tenth condition is satisfied, the UE performs Operation 6. The tenth condition includes at least one of the followings:

[0480] ● The third resource is aperiodic (and the fourth resource is an uplink signal) and the fourth resource is semi-persistent / periodic. Optionally, the uplink signal may be an SRS and / or a reference signal for positioning;

[0481] ● The third resource is aperiodic (and the fourth resource is an uplink channel) and the fourth resource is an uplink channel triggered by higher layer / configured by higher layer. Optionally, the uplink channel triggered by the higher layer / configured by the higher layer may be a PUSCH / PUCCH without a corresponding PDCCH, or the uplink channel triggered by the higher layer / configured by the higher layer may be a PUSCH of the corresponding configuration grant. Optionally, the uplink channel triggered by the higher layer / configured by the higher layer may be a physical random access channel (PRACH);

[0482] ● The third resource is aperiodic and the fourth resource is semi-persistent / periodic;

[0483] ● The time domain behavior of the third resource is different from the time domain behavior of the fourth resource. Optionally, the time domain behavior may be one of aperiodic, semi-persistent, and periodic. For example, in case where the third resource is periodic and the fourth resource is aperiodic, the time domain behavior of the third resource and the time domain behavior of the fourth resource are different. For example, in case where the third resource is periodic and the fourth resource is also periodic, the time domain behavior of the third resource and the time domain behavior of the fourth resource are the same.

[0484] Optionally, when an eleventh condition is satisfied, the UE performs Operation 7. The eleventh condition includes at least one of the followings:

[0485] ● The third resource is periodic / semi-persistent (and the fourth resource is an uplink signal) and the fourth resource is aperiodic. Optionally, the uplink signal may be an SRS and / or a reference signal for positioning;

[0486] ● The third resource is periodic / semi-persistent (and the fourth resource is an uplink channel) and the fourth resource is an uplink channel triggered by DCI / scheduled by DCI. Optionally, the uplink channel triggered by DCI / scheduled by DCI may be a PUSCH / PUCCH with a corresponding PDCCH, or a PUSCH / PUCCH determined based on detection of DCI.

[0487] ● The third resource is periodic / semi-persistent and the fourth resource is aperiodic;

[0488] ● The time domain behavior of the third resource is different from the time domain behavior of the fourth resource. Optionally, the time domain behavior may be one of aperiodic, semi-persistent, and periodic. For example, in case where the third resource is periodic and the fourth resource is aperiodic, the time domain behavior of the third resource and the time domain behavior of the fourth resource are different. For example, in case where the third resource is periodic and the fourth resource is also periodic, the time domain behavior of the third resource and the time domain behavior of the fourth resource are the same.

[0489] The above method defines under what condition the UE performs one of Operation 6 and Operation 7, so that the UE and the base station have the same understanding of the UE behavior, improving the reliability of the communication system.

[0490] The following discusses (in case where the eighth condition is satisfied) under what condition, the UE performs Operation 8. Optionally, when a twelfth condition is satisfied, the UE performs Operation 8. The twelfth condition includes at least one of the followings:

[0491] ● The UE reports the third UE capability information, where the third UE capability information indicates that the UE supports Operation 8;

[0492] ● The UE does not report the first UE capability information, where the first UE capability information indicates that the UE does not support Operation 8;

[0493] ● The UE supports Operation 8;

[0494] ● The UE receives the third indication information, where the third indication information indicates that Operation 8 is enabled;

[0495] ● The UE does not receive the third indication information, where the third indication information indicates that Operation 8 is disabled;

[0496] ● Operation 8 enabled;

[0497] ● The beam of the third resource is the same as the beam of the fourth resource. Optionally, the beam of the third resource being the same as the beam of the fourth resource refers to the spatial domain filter used for transmitting the third resource being the same as the spatial domain filter used for transmitting the fourth resource, or the (uplink) TCI state used for transmitting the third resource being the same as the (uplink) TCI state used for transmitting the fourth resource.

[0498] The above method defines under what condition the UE performs Operation 8, so that the UE and the base station have the same understanding of the UE behavior, improving the reliability of the communication system.

[0499] In the disclosure, the BWP may be the BWP of a cell. Optionally, the BWP may be the BWP of the SBFD cell. Optionally, the BWP may be in the SBFD cell. Optionally, the BWP may be the BWP where the measurement of the resource for the CLI measurement is located. The cell of the BWP may be the cell where the BWP is located. Optionally, the cell of the BWP may be the cell where the uplink channel / uplink signal is located. Optionally, the cell of the BWP may be the cell where the downlink channel / downlink signal is located. Optionally, the cell of the BWP may be the cell where the first resource / the second resource / the third resource / the fourth resource are located.

[0500] In the disclosure, a cell may be a serving cell or a non-serving cell. The cell may be at least one of a Primary Cell (PCell), a Primary Secondary Cell (PSCell), a Secondary Cell, and a Special Cell. The Special Cell (SpCell) may be a PCell or a PSCell. In dual connectivity operation, the Special Cell refers to a Primary Cell of a Master Cell Group (MCG) or a Primary Secondary Cell of a Secondary Cell Group (SCG). Otherwise, the Special Cell refers to a Primary Cell. The Special Cell may be a current Special Cell.

[0501] In the disclosure, a cell may include one or more CCs. A cell may include one or more uplink CCs, and / or one or more downlink CCs.

[0502] In the disclosure, a cell may have a physical cell ID (PCI). Optionally, the UE may acquire the PCI of the cell by receiving a synchronization signal / physical broadcast channel block (SS / PBCH block, SSB). Optionally, the SSB is a cell-defining SSB. Optionally, the UE may acquire the PCI of the cell by indication from the base station. For example, the UE may acquire the PCI of the non-serving cell by indication from the base station. For example, the UE may acquire the PCI of the SSB of the non-serving cell by indication from the base station.

[0503] In the disclosure, an SSB may have PCI. The PCI of an SSB may be determined based on the reference signal in the SSB or based on indication from the base station. Optionally, the reference signal in the SSB may be a Primary Synchronization Signal (PSS) and / or a Secondary Synchronization Signal (SSS).

[0504] In the disclosure, the starting time domain position of a channel or signal or resource is an earlier position in time domain, and the ending time domain position of a channel or signal or resource is a later position in time domain.

[0505] In the disclosure, the starting frequency domain position of a channel or signal or resource is a lower position in frequency domain, and the ending frequency domain position of a channel or signal or resource is a higher position in frequency domain.

[0506] In the disclosure, the time domain resource and / or the frequency domain resource may be referred to as the physical resource.

[0507] In the disclosure, the UE may perform uplink transmission and / or downlink reception on the physical resource.

[0508] In the disclosure, the UE may receive the downlink channel and / or the downlink signal on the physical resource.

[0509] The channel received on the physical resource may be referred to as the downlink physical channel. The Signal received on the physical resource may be referred to as the downlink physical signal. The downlink channel includes the downlink control channel and / or the downlink data channel. The downlink control channel may be the physical downlink control channel (PDCCH). The downlink data channel may be the physical downlink shared channel (PDSCH).

[0510] The signal received on the physical resource may be referred to as the downlink physical signal. The downlink signal may include at least one of the followings: a reference signal for synchronization, a reference signal for demodulation, a reference signal for acquiring a channel state, a reference signal for phase tracking, a reference signal for mobility, a reference signal for positioning, a reference signal for channel measurement, a reference signal for interference measurement. Optionally, the reference signal for synchronization includes at least one of the followings: a primary synchronization signal, a secondary synchronization signal. Optionally, the reference signal for synchronization may include synchronization signal / physical broadcast channel block (SS / PBCH block, SSB).

[0511] In the disclosure, the reference signal for demodulation may be referred to as a demodulation reference signal (DM-RS). The reference signal for phase tracking may be referred to as a phase-tracking reference signal (PT-RS). The reference signal for positioning may be referred to as a positioning reference signal (PRS). The reference signal for acquiring the channel state may be referred to as a channel-state information reference signal (CSI-RS).

[0512] In the disclosure, the UE may transmit the uplink channel and / or the uplink signal on the physical resource.

[0513] The channel transmitted on the physical resource may be referred to as the uplink physical channel. The uplink channel includes at least one of the followings: an uplink control channel, an uplink data channel, and a random access channel. The uplink control channel may be the physical uplink control channel (PUCCH). The uplink data channel may be the physical uplink shared channel (PUSCH). The random access channel may be the physical random access channel (PRACH). In the disclosure, the term “PUCCH” may be used interchangeably with the term “uplink control channel” or “control channel for uplink transmission” or “control channel for uplink” or “channel for uplink control information”. In the disclosure, the term “PUSCH” may be used interchangeably with the term “uplink data channel” or “data channel for uplink transmission” or “data channel for uplink”.

[0514] The signal transmitted on the physical resource may be referred to as the uplink physical signal. The uplink signal may include at least one of the followings: a reference signal for demodulation, a reference signal for phase tracking, and a reference signal for sounding. The reference signal for sounding may be referred to as a sounding reference signal (SRS).

[0515] Optionally, the reference signal for demodulation may include at least one of the followings: a reference signal for data channel demodulation and a reference signal for control channel demodulation. Optionally, the reference signal for acquiring the channel state may include at least one of the followings: a reference signal for tracking, a reference signal for CSI acquisition, a reference signal for beam management. The reference signal for beam management includes at least one of the followings: a reference signal for acquiring Layer 1-Reference Signal Received Power (L1-RSRP), a reference signal for acquiring Layer 1-Signal to Interference plus Noise Ratio (L1-SINR). Acquiring L1-RSRP may be calculating L1-RSRP. Acquiring L1-SINR may be calculating L1-SINR.

[0516] In the disclosure, the UE may acquire downlink control information (DCI) via PDCCH.

[0517] In the disclosure, the term “downlink control information” may be used interchangeably with the term “DCI format” or “control information for downlink”.

[0518] In the disclosure, the term “PDCCH” may be used interchangeably with the term “downlink control channel” or “control channel for downlink transmission” or “control channel for downlink”.

[0519] In the disclosure, the term “PDCCH” may be used interchangeably with the term “PDCCH candidate”.

[0520] In the disclosure, a PDCCH may be composed of one or more control channel elements (CCEs). Optionally, one or more CCEs associated with / corresponding to the PDCCH may be the one or more CCEs constituting the PDCCH. An aggregation level (AL) of the PDCCH may be L, where L may be 1, 2, 4, 8, 16. If the aggregation level of a PDCCH is L, the PDCCH is composed of L CCEs, or is associated with / corresponds to L CCEs. The term “aggregation level” and the term “CCE aggregation level” may be used interchangeably.

[0521] In the disclosure, the UE monitors the PDCCH in a search space associated with the control resource ret (CORESET). The PDCCH may be monitored from the search space associated with the control resource set.

[0522] In the disclosure, the term “control resource set” may be used interchangeably with the term “control resource” or “resource for receiving control information” or “resource for monitoring PDCCH” or “resource for detecting control information”.

[0523] In the disclosure, the term “search space” may be used interchangeably with the term “PDCCH search space” or “PDCCH search space set” or “PDCCH candidate search space” or “PDCCH candidate search space set” or “search space for searching PDCCH” or “search space for searching PDCCH candidate” or “search space set for searching PDCCH” or “search space set for searching PDCCH candidate”. Optionally, the search space may be a common search space (CSS) or a UE-specific search space (USS). Optionally, the search space may be used to detect DCI. Optionally, the search space may be used to detect DCI format.

[0524] In the disclosure, the term “PDCCH candidate associated with search space” may be used interchangeably with the term “PDCCH candidate in the search space”.

[0525] In the disclosure, a modulation scheme associated with the PDCCH candidate may be the modulation scheme used by the corresponding PDCCH candidate. The aggregation level associated with the PDCCH candidate may be the aggregation level of the corresponding PDCCH candidate.

[0526] In the disclosure, the UE may monitor the PDCCH (or monitor the PDCCH candidate) in PDCCH monitoring occasion(s). Optionally, the PDCCH monitoring occasion may be one or more (consecutive) time domain units. Optionally, the PDCCH monitoring occasion may be an occasion for monitoring the PDCCH, or an occasion for monitoring the PDCCH candidate.

[0527] In the disclosure, monitoring the PDCCH candidate may be receiving the PDCCH candidate and / or decoding according to the monitored DCI format.

[0528] In the disclosure, detecting DCI includes receiving and / or decoding DCI.

[0529] In the disclosure, the DCI format may be at least one of the followings: DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 0_3, DCI format 1_0, DCI format 1_1, DCI format 1_2, and DCI format 1_3. In the disclosure, the type of the DCI format may be one of the followings: DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 0_3, DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 1_3.

[0530] In the disclosure, the PDCCH may carry DCI and / or cyclic redundancy check (CRC) corresponding to the DCI, or the DCI and / or the CRC corresponding to DCI may be in the PDCCH. Optionally, the CRC may be scrambled in a specific method. For example, optionally, the CRC may be scrambled based on a Radio Network Temporary Identifier (RNTI). Two PDCCHs having the same scrambling may be the two PDCCHs are scrambled by the same RNTI. Optionally, the RNTI may be one of a Cell-Radio Network Temporary Identifier (C-RNTI), a Configured Scheduling-Radio Network Temporary Identifier (CS-RNTI).

[0531] In the disclosure, the term “information bits of DCI” may be used interchangeably with the term “information bits associated with DCI” or “information bits included in DCI” or “information bits corresponding to DCI”. Optionally, the information bits associated with the DCI may include the information bits of the DCI and the check bits (for example, CRC bits) corresponding to the DCI. Optionally, the information bits associated with the DCI may include the information bits of the DCI and bits for checking the DCI (for example, CRC bits).

[0532] In the disclosure, the information bits of the DCI may be the information bits included in the DCI, or the information bits associated with the DCI, or the payload of the DCI.

[0533] In the disclosure, DCI may include one or more information fields.

[0534] In the disclosure, the term “size of information field” may be used interchangeably with the term “bitwidth of information field” or “number of information bits in information field”.

[0535] In the disclosure, the existence of an information field may be that the size of the information field is greater than 0 bit. The absence of an information field may be that the size of the information field is equal to 0 bit.

[0536] In the disclosure, the value x of an information field may correspond to the (x+1)-th codepoint of the information field, x≥0. The term “value of an information field” may be used interchangeably with the term “codepoint of an information field”. The term “value x of an information field” may be used interchangeably with the term “(x+1)-th codepoint of an information field”, where x≥0.

[0537] In the disclosure, when the DCI schedules a channel or signal, a cell receiving or transmitting the channel or signal may be referred to as a scheduled cell. A cell where the DCI is detected or a cell where the DCI is monitored / received may be referred to as a scheduling cell.

[0538] In the disclosure, when the DCI schedules a channel or signal, a BWP receiving or transmitting the channel or signal may be referred to as a scheduled BWP. A BWP where the DCI is detected, or a BWP where the PDCCH associated with the DCI is monitored / received may be referred to as a scheduling BWP.

[0539] In the disclosure, the UE may acquire data via PDSCH. The UE may acquire downlink data by reception of the PDSCH.

[0540] In the disclosure, the term “PDSCH” may be used interchangeably with the term “downlink data channel” or “data channel for downlink transmission” or “downlink channel for receiving data” or “downlink channel for carrying data”.

[0541] In the disclosure, the PDSCH may be scheduled / indicated by DCI. The PDSCH scheduled / indicated by DCI may be referred to as the dynamically scheduled PDSCH. For example, the PDSCH may be scheduled by DCI format.

[0542] In the disclosure, the PDSCH may be the PDSCH for semi-persistent scheduling (SPS). In the disclosure, the term “PDSCH for semi-persistent scheduling” may be used interchangeably with the term “SPS PDSCH” or “PDSCH without corresponding PDCCH” or “PDSCH scheduled without corresponding PDCCH” or “PDSCH with SPS”. Here, the PDCCH may be PDCCH transmission. Optionally, the SPS PDSCH may be scheduled based on higher-layer configuration information. Optionally, the higher-layer configuration information may be used for configuring downlink semi-persistent transmission. The higher-layer configuration information is, for example, SPS-Config. The information for configuring downlink semi-persistent transmission may be referred to as SPS configuration information. Optionally, the SPS PDSCH may be activated by DCI. Optionally, the DCI is scrambled by CS-RNTI or Group CS-RNTI (G-CS-RNTI).

[0543] In the disclosure, a reference signal associated with the downlink channel includes the reference signal for demodulation, and / or the reference signal for phase tracking. For example, the reference signal associated with the downlink channel includes the reference signal for demodulating the downlink channel, and / or the reference signal for phase tracking the downlink channel. The reference signal associated with the downlink channel may be referred to as the reference signal of the downlink channel.

[0544] In the disclosure, the downlink channel may include the downlink channel and the reference signal associated with the downlink channel.

[0545] In the disclosure, the UE may transmit uplink control information (UCI) via the uplink channel.

[0546] In the disclosure, the term “uplink control information (UCI)” may be used interchangeably with the term “control information for uplink”.

[0547] In the disclosure, the UCI includes Hybrid Automatic Repeat Request (HARQ) information, information for scheduling request (SR), information for link recovery request (LRR), channel state information (CSI). The Hybrid Automatic Repeat Request information may be Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information. The information for scheduling request may be referred to as a scheduling request. The information for link recovery request may be referred to as a link recovery request.

[0548] In the disclosure, the UCI includes UCI information bits. In the disclosure, information bits of UCI may be information bits included in UCI, or information bits associated with UCI, or payload of UCI.

[0549] In the disclosure, the term “UCI information bits” may be used interchangeably with the term “information bits associated with UCI” or “information bits included in UCI” or “information bits corresponding to DCI / UCI”. The information bits associated with UCI may include information bits of the UCI and check bits (e.g., CRC bits) corresponding to the UCI. The information bits associated with UCI may include information bits of the UCI and bits used for checking the UCI (e.g., CRC bits).

[0550] In the disclosure, CSI information bits may be divided into one part or two parts. When the CSI information bits correspond to two parts, the two parts are CSI Part one and CSI Part two.

[0551] In the disclosure, the UE may transmit one or two PUCCHs within a time domain unit in a serving cell. The two PUCCHs are on different time domain resources. For example, the UE may transmit two PUCCHs on different symbols within a slot.

[0552] In the disclosure, the term “PUCCH” may be used interchangeably with the term “uplink control channel” or “channel for transmitting uplink control information” or “channel for carrying uplink control information”.

[0553] In the disclosure, the UE may transmit data and / or UCI through PUSCH. The UCI being on the PUSCH may be referred to as the UCI being multiplexed; optionally, the UCI and data being transmitted together on the PUSCH may be referred to as the UCI being multiplexed.

[0554] In the disclosure, PUSCH may be used for carrying information bits. The information bits carried by the PUSCH may be referred to as information bits of the PUSCH. The information bits of the PUSCH include information bits of the TB and / or information bits of the UCI.

[0555] In the disclosure, the term “information bits of PUSCH” may be used interchangeably with the term “information bits associated with PUSCH” or “information bits carried by PUSCH”. Optionally, the information bits carried by the PUSCH may include the information bits carried by the PUSCH and check bits (for example, CRC bits). Optionally, the information bits associated with the PUSCH may include the information bits of the PUSCH and bits used for checking the information carried by the PUSCH (for example, CRC bits).

[0556] In the disclosure, the reference signal associated with the uplink channel includes the reference signal for demodulation, and / or the reference signal for phase tracking. For example, the reference signal associated with the uplink channel includes the reference signal for demodulating the uplink channel, and / or the reference signal for phase tracking the uplink channel. The reference signal associated with the uplink channel may be referred to as the reference signal of the uplink channel.

[0557] In the disclosure, the uplink channel may include the uplink channel and the reference signal associated with the uplink channel.

[0558] In the disclosure, the UE may acquire indication information from the base station. Optionally, the indication information may include at least one of the followings: configuration information, activation command and deactivation command. The indication information from the base station may be carried / indicated via at least one of Radio Resource Control (RRC) information, Media Access Control (MAC)-Control Element (CE) (MAC-CE), DCI. The RRC information may be referred to as configuration information. The configuration information may be indicated by a RRC parameter in the RRC information. The RRC parameter may be a RRC information element. MAC-CE related indication information may be indicated via a MAC-CE parameter in MAC-CE. The MAC-CE parameter may be a parameter for MAC-CE signaling indication / activation / deactivation.

[0559] In the disclosure, the UE may acquire one or more configurations via RRC information, and indicate / activate / deactivate a part of the one or more configurations via MAC-CE. The UE may operate according to the configuration indicated / activated by MAC-CE.

[0560] In the disclosure, the UE may acquire one or more configurations via RRC information, and indicate / activate / deactivate a part of configurations of the one or more configurations via MAC-CE. The UE may operate according to the configurations indicated / activated by MAC-CE. Optionally, the UE may determine one or more configurations of the part of the configurations (e.g., the part of the configurations indicated / activated by MAC-CE) based on indication of DCI. The UE may operate according to the configuration indicated by DCI.

[0561] In the disclosure, the RRC parameter and / or MAC-CE parameter may be referred to as the higher-layer parameter.

[0562] In the disclosure, the UE acquiring the configuration information may be that the UE receiving / being configured with the configuration information. In the disclosure, “acquiring configuration information” may be used interchangeably with the term “receiving configuration information” or “being configured with configuration information”.

[0563] In the disclosure, the UE may transmit indication information to the base station. The indication information transmitted to the base station may be carried / indicated via at least one of Radio Resource Control (RRC) information, Media Access Control (MAC)-Control Element (CE) (MAC-CE), and UCI.

[0564] In the disclosure, the UE may transmit information for indicating / reporting UE capability to the base station. The UE capability includes UE radio access capability.

[0565] In the disclosure, the term “UE capability” may be used interchangeably with the term “UE feature” or “UE feature group” or “UE capability parameter” or “reported UE capability” or “UE capability signaling” or “reported UE capability parameter”.

[0566] In the disclosure, the UE may receive / acquire CSI reporting configuration. The CSI reporting configuration may be indicated / configured by a higher-layer parameter CSI-ReportConfig.

[0567] In the disclosure, the term “CSI” may be used interchangeably with the term “CSI parameter” or “CSI quantity”.

[0568] In the disclosure, CSI may include at least one of the followings: CSI reference signal (CSI-RS) resource indicator (CRI), rank indicator (RI), precoding matrix indicator (PMI), channel quality indicator (CQI), layer indicator (LI), synchronization signal (SS) / physical broadcast channel (PBCH) block resource indicator (SSBRI), Layer 1-reference signal received power (L1-RSRP), Layer 1-single to interference noise ratio (L1-SINR), CapabilityIndex, time-domain channel properties (TDCP). The content included in the CSI may be indicated by the base station. For example, the content included in the CSI may be configured by a higher-layer parameter (e.g., reportQuantity). For example, the higher-layer parameter (e.g., reportQuantity) is indicated by the CSI reporting configuration.

[0569] In the disclosure, the time resource and / or frequency resource used by the UE to report the CSI may be controlled by the base station. The UE may report the CSI through the uplink channel / uplink signal. The UE may transmit the uplink channel associated with the CSI report. The CSI may be carried / indicated by the uplink channel / uplink signal. In the disclosure, the CSI report may be at least one of the followings: periodic, semi-persistent, aperiodic. In the disclosure, the CSI report may be at least one of the followings: periodic, semi-persistent on PUCCH (semiPersistentOnPUCCH), semi-persistent on PUSCH (semiPersistentOnPUSCH), aperiodic. Optionally, the time domain behavior of the CSI report may be at least one of the followings: periodic, semi-persistent, aperiodic. The periodic CSI report may be carried by PUCCH. The semi-persistent CSI report may be carried by PUCCH or PUSCH. The aperiodic CSI report may be carried by PUSCH. The time domain behavior of the CSI report may be indicated / configured by a higher-layer parameter (e.g., reportConfigType). For example, the higher-layer parameter (e.g., reportConfigType) is indicated by the CSI reporting configuration. The time domain behavior of the CSI report may be the time domain behavior of the CSI report corresponding to the CSI reporting configuration. When reportConfigType is set to 'aperiodic', the corresponding CSI report is aperiodic CSI report. When reportConfigType is set to 'semiPersistentOnPUCCH', the corresponding CSI report is semi-persistent CSI report carried by PUCCH. When reportConfigType is set to 'semiPersistentOnPUSCH', the corresponding CSI report is semi-persistent CSI report carried by PUSCH. When reportConfigType is set to 'periodic', the corresponding CSI report is periodic CSI report.

[0570] In the disclosure, the periodic CSI report may be triggered / indicated by RRC signaling. For example, when the UE receives the CSI reporting configuration triggering / indicating periodic CSI report and the configuration information is applied (or after the configuration information is applied), the UE performs corresponding CSI report. In the disclosure, the semi-persistent CSI report may be triggered / indicated by MAC-CE or DCI. For example, the semi-persistent CSI report transmitted on PUCCH is triggered / indicated by MAC-CE. For example, the semi-persistent CSI report transmitted on PUSCH is triggered / indicated by DCI. In the disclosure, the aperiodic CSI report may be triggered / indicated by DCI. For example, when the UE receives DCI triggering / indicating the CSI report, the UE transmits the corresponding CSI report.

[0571] In the disclosure, the term “uplink channel associated with CSI report” may be used interchangeably with the term “uplink channel corresponding to CSI report” or “uplink channel carrying CSI report”.

[0572] In the disclosure, the CSI may be the CSI reported by the UE in one report, or in one report instance.

[0573] In the disclosure, the generation and / or reporting of the CSI is based on the CSI reporting configuration. For example, the UE receives the CSI reporting configuration from the base station and generates and / or reports the CSI based on the CSI reporting configuration.

[0574] In the disclosure, the term “CSI reporting configuration” may be used interchangeably with the term “CSI reporting configuration information” or “information for CSI reporting configuration” or “information for configuring CSI reporting” or “CSI reporting setting”.

[0575] In the disclosure, a CSI reporting band may be indicated by the CSI reporting configuration. Frequency domain granularity associated with / corresponding to the CSI may be wideband and / or subband. For example, PMI / CQI report may be wideband and / or subband.

[0576] In the disclosure, PMI (or, the value of PMI) may correspond to a codebook (or, a codebook index). The codebook corresponding to the PMI may be indicated by the base station. For example, the codebook corresponding to the PMI is indicated by a parameter (e.g., CodebookConfig) in the CSI reporting configuration. In the disclosure, the term “codebook” may be used interchangeably with the term “CSI codebook” or “codebook configuration parameter” or “codebook configuration information” or “information for configuring the codebook”. Optionally, the codebook may be at least one of the followings: Type I codebook, Type II codebook, Enhanced Type II codebook, Further Enhanced Type II Port Selection, Enhanced Type II for coherent joint transmission (CJT), Further Enhanced Type II Port Selection for CJT, Enhanced Type II for predicted PMI, Further Enhanced Type II Port Selection for predicted PMI. The configuration information related to the codebook may include / indicate a codebook subset restriction.

[0577] In the disclosure, the UE may calculate CSI parameters based on the assumption on dependencies between CSI parameters. The assumption of correlation between CSI parameters includes at least one of the followings: LI is calculated conditioned on the reported CQI, PMI, RI and CRI; CQI is calculated conditioned on the reported PMI, RI and CRI; PMI is calculated conditioned on the reported RI and CRI; RI is calculated conditioned on the reported CRI.

[0578] In the disclosure, the UE may acquire / determine / generate the CSI through measurement of the CSI resource. In the disclosure, the time resource and / or frequency resource of the CSI resource may be controlled by the base station. The CSI resource may include the reference signal and / or the downlink channel. The CSI resource may be configured by CSI resource configuration. The CSI resource configuration may indicate one or more CSI resource sets. Optionally, each CSI resource set may include / indicate one or more reference signals. Optionally, the CSI reporting configuration may be associated with one or more CSI resource configurations. For example, the UE may acquire / determine / generate the CSI corresponding to a CSI reporting configuration by measuring the CSI resource corresponding to the CSI resource configuration associated with the CSI reporting configuration.

[0579] In the disclosure, the term “CSI resource configuration” may be used interchangeably with the term “CSI resource configuration information” or “information for CSI resource configuration” or “information for configuring CSI resource” or “CSI resource setting”.

[0580] In the disclosure, the UE may determine the measurement for calculating the CSI based on the CSI resource (or, occasion of the CSI resource). For example, the UE may determine channel measurement and / or interference measurement for calculating the CSI based on the CSI resource (or the occasion of the CSI resource). For example, the UE may determine channel measurement for calculating the CSI based on the CSI resource (or the occasion of the CSI resource) for channel measurement. For example, the UE may determine interference measurement for calculating the CSI based on the CSI resource (or the occasion of the CSI resource) for interference measurement.

[0581] In the disclosure, the term “transmission occasion of CSI resource” may be used interchangeably with the term “occasion of CSI resource” or “reception occasion of CSI resource” or “transmission occasion of CSI resource”.

[0582] In the disclosure, the term “transmission occasion of reference signal resource” may be used interchangeably with the term “occasion of reference signal resource” or “reception occasion of reference signal resource” or “transmission occasion of reference signal” or “occasion of reference signal” or “reception occasion of reference signal”.

[0583] In the disclosure, “determining measurement” may be determining the result of the measurement, or acquiring the result of the measurement, or acquiring the measurement based on the reference signal, or acquiring the measurement based on the measurement resource, or acquiring the measurement for determining the CSI.

[0584] In the disclosure, “determining channel measurement” may be determining the result of the channel measurement, or acquiring the result of the channel measurement, or acquiring the channel measurement based on the reference signal, or acquiring the channel measurement based on the measurement resource, or acquiring the channel measurement for determining the CSI.

[0585] In the disclosure, “determining interference measurement” may be determining the result of the interference measurement, or acquiring the result of the interference measurement, or acquiring the interference measurement based on the reference signal, or acquiring the interference measurement based on the measurement resource, or acquiring the interference measurement for determining the CSI.

[0586] In the disclosure, the measurement of the CSI resource may or may not be performed with measurement restriction. The measurement restriction may be a time domain measurement restriction. The time domain measurement restriction includes the time domain restriction for channel measurement and / or the time domain restriction for interference measurement. The measurement restriction may be enabled or disabled by the CSI reporting configuration. For example, a parameter (e.g., timeRestrictionForChannelMeasurement) in the CSI reporting configuration may be used to enable the time domain restriction for channel measurement. For example, a parameter (e.g., timeRestrictionForInterferenceMeasurement) in the CSI reporting configuration may be used to enable the time domain restriction for interference measurement.

[0587] In the disclosure, the term “reference signal” may be used interchangeably with the term “reference signal resource”.

[0588] In the disclosure, the reference signal may include at least one of the followings: the reference signal for synchronization, the reference signal for demodulation, the reference signal for acquiring channel states, the reference signal for phase tracking, the reference signal for mobility, the reference signal for positioning, the reference signal for channel measurement, the reference signal for interference measurement, the reference signal for sounding. Optionally, the reference signal for synchronization includes at least one of the followings: the primary synchronization signal, the secondary synchronization signal. Optionally, the reference signal for synchronization may include the synchronization signal / physical broadcast channel block. Optionally, the reference signal for demodulation may include at least one of the followings: the reference signal for data channel demodulation, the reference signal for control channel demodulation. Optionally, the data channel may include at least one of the followings: the physical downlink shared channel and the physical uplink shared channel. Optionally, the control channel may include at least one of the followings: the physical downlink control channel and the physical uplink control channel. Optionally, the reference signal for acquiring channel state may include at least one of the followings: the reference signal for tracking, the reference signal for CSI acquisition, and the reference signal for beam management. Optionally, the reference signal for beam management includes at least one of the followings: the reference signal for acquiring L1-RSRP, the reference signal for acquiring L1-SINR. Optionally, acquiring L1-RSRP may be calculating L1-RSRP. Optionally, acquiring L1-SINR may be calculating L1-SINR.

[0589] In the disclosure, a type of the reference signal (or the type of the CSI-RS) includes a reference signal for tracking, a reference signal for beam management, a reference signal for CSI acquisition.

[0590] For example, the reference signal for tracking may be a reference signal with a tracking reference signal information parameter (e.g., trs-Info). Optionally, with the tracking reference signal information parameter means that the configuration information for configuring the resource set of the reference signal is configured with the tracking reference signal information parameter. Optionally, the tracking reference signal information parameter indicates that the antenna port for all resources in the resource set is same. Optionally, the resources in the resource set are NZP CSI-RS resources. Optionally, all resources in the resource set are NZP CSI-RS resources.

[0591] For example, the reference signal for beam management may be a reference signal with a repetition parameter (e.g. repetition). Optionally, with the repetition parameter means that the configuration information for configuring the resource set of the reference signal is configured with the repetition parameter. Optionally, the repetition parameter is used for indicating whether repetition is on / off. If the UE is configured with a non-zero power CSI-RS resource set (for example, a resource set configured by the NZP-CSI-RS-ResourceSet parameter), and repetition is set to 'on', the UE may assume that the resources within the resource set are transmitted with the same downlink spatial domain transmission filter, where the resources in the resource set are transmitted in different OFDM symbols. If repetition is set to 'off', the UE does not assume that the resources within the resource set are transmitted with the same downlink spatial domain transmission filter. Optionally, the resources in the resource set are NZP CSI-RS resources.

[0592] Optionally, the reference signal for CSI acquisition may be a reference signal without the tracking reference signal information parameter and without the repetition parameter.

[0593] In the disclosure, the term “beam” may include at least one of the followings: “quasi co-location (QCL) parameter”, “transmission configuration indication (TCI) state”, “spatial domain filter”, “antenna port”, “transmission and reception point (TRP)”, “reference signal”, “beam information”, “beam index”. Optionally, a beam and another beam being the same may be a beam and another beam being quasi co-located.

[0594] In the disclosure, an antenna port can be defined such that the channel over which a symbol on the antenna port is conveyed can be inferred from the channel over which another symbol on the same antenna port is conveyed.

[0595] In the disclosure, two antenna ports are said to be quasi co-located if the large-scale properties of the channel over which a symbol on one antenna port is conveyed can be inferred from the channel over which a symbol on the other antenna port is conveyed. Optionally, the large-scale properties include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters.

[0596] In the disclosure, the term “QCL parameter” may be used interchangeably with the terms “QCL information”, “QCL assumption”, “QCL configuration”, “QCL configuration and / or QCL type”. Optionally, the QCL parameter may include / represent at least one of the followings: Doppler shift, Doppler spread, average delay, delay spread, spatial reception parameter. The spatial reception parameter may be a parameter for spatial reception. Optionally, the QCL parameter may include a combination of different types of parameters. For example, the QCL parameter may include Doppler shift, Doppler spread, average delay and delay spread, and such QCL parameter may be referred to as QCL parameter type A. For example, the QCL parameter may include Doppler shift and Doppler spread, and such QCL parameter may be referred to as QCL parameter type B. For example, the QCL parameter may include Doppler shift and average delay, and such QCL parameter may be referred to as QCL parameter type C. For example, the QCL parameter may include spatial reception parameter, and such QCL parameter may be referred to as QCL parameter type D. For example, two antenna ports are said to be quasi co-located if the large-scale properties of the channel over which a symbol on one antenna port is conveyed can be inferred from the channel over which a symbol on the other antenna port is conveyed. Optionally, the large-scale properties include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters. For example, two antenna ports are said to be quasi co-located subject to QCL parameter type D if spatial Rx parameters of the channel over which a symbol on one antenna port is conveyed can be inferred from the channel over which a symbol on the other antenna port is conveyed.

[0597] In the disclosure, the term “spatial domain filter” may be used interchangeably with the term “spatial filter” or “uplink transmission spatial domain filter” or “spatial domain filter for uplink transmission” or “spatial domain filter for downlink reception”.

[0598] In the disclosure, the term “TCI state” may be used interchangeably with the term “TCI state configuration” or “TCI state configuration information” or “information for configuring the TCI state” or “information for indicating the TCI state”. Optionally, the TCI state may be a unified TCI state. Optionally, the TCI state may be at least one of an uplink TCI state (UL TCI state), a downlink TCI state (DL TCI state), a joint TCI state. Optionally, the unified TCI state may be an uplink TCI state (UL TCI state) and a downlink TCI state (DL TCI state), or a joint TCI state.

[0599] In the disclosure, a TCI state may include parameters configuring quasi co-location relation, these parameters configure the relation between the reference signal (e.g., one or two reference signals, or one or two downlink reference signals) and at least one of the followings: a demodulation reference signal (DM-RS) port of the PDSCH, a DM-RS port of the PDCCH, a CSI-RS port of a CSI-RS resource. Optionally, a quasi co-location relation is configured by a higher-layer parameter (e.g., qcl-Type1) for the first downlink reference signal. Optionally, a quasi co-location relation is configured by a higher-layer parameter (e.g., qcl-Type2) for the second downlink reference signal. In case of two downlink reference signals, the QCL types are not the same, regardless of whether the references are to the same DL RS or different DL RSs.

[0600] In the disclosure, the TCI state may be used for providing a reference signal for the quasi co-location for DM-RS of PDSCH and DM-RS of PDCCH in a BWP / CC, for CSI-RS, and used to provide a reference, if applicable, for determining UL TX spatial filter. Optionally, the UL TX spatial filter may be for dynamic-grant and configured-grant based PUSCH and PUCCH resource, and SRS.

[0601] In the disclosure, the UE may acquire the indicated TCI state for reception of the downlink channel / downlink signals, and / or for transmission of the uplink channel / uplink signal. The indicated TCI state may be acquired by the following method.

[0602] The UE may receive / apply the indication of the TCI state. For example, the indication of the TCI state may be from the base station. Optionally, the UE may acquire the indicated TCI state by receiving the indication of the TCI state. The TCI state may be indicated via at least one of the following signaling: RRC, MAC-CE, DCI. Optionally, the indicated TCI state may be acquired via at least one of the followings: RRC, MAC-CE, DCI. Optionally, the UE may acquire configured TCI states by reception of RRC signaling related to the TCI state. Optionally, the UE may acquire activated TCI states by reception of MAC-CE signaling. Optionally, the activated TCI states are from th...

Claims

1.A method performed by a user equipment (UE), the method comprising:receiving, from a base station, configuration information on a channel state information (CSI) report, wherein the configuration information includes first information on a first resource for a channel measurement, second information on a second resource for a prediction of a report quantity, and third information on a time gap;performing the prediction of the report quantity for the second resource for time instances, based on the channel measurement for the first resource; andtransmitting, to the base station, the CSI report including information on the report quantity,wherein an earliest time instance of the time instances is after a reference time corresponding to a latest resource of the first resource by the time gap.2.The method of claim 1, wherein the configuration information further includes information on a number of the time instances,wherein, in case that the number of the time instances is greater than 1, the time gap is applied between two consecutive time instances among the time instances and the CSI report includes a time instance indicator corresponding to a largest predicted value of a predicted reference signal received power (RSRP) of the time instances.3.The method of claim 2, wherein the CSI report includes CSI fields in an order of the time instance indicator, predicted CSI-RS resource indicators (CRIs), and predicted reference signal received powers (RSRPs),wherein the predicted CRIs are ordered in ascending order of the time instances, andwherein the predicted RSRPs are ordered in ascending order of the time instances.4.The method of claim 1, wherein the reference time corresponds to a latest CSI-reference signal (RS) transmission occasion no later than a CSI refence resource of the CSI report.5.A method performed by a base station, the method comprising:transmitting, to a user equipment (UE), configuration information on a channel state information (CSI) report, wherein the configuration information includes first information on a first resource for a channel measurement, second information on a second resource for a prediction of a report quantity, and third information on a time gap; andreceiving, from the UE, the CSI report including information on the report quantity,wherein the prediction of the report quantity for the second resource for time instances is based on the channel measurement for the first resource, andwherein an earliest time instance of the time instances is after a reference time corresponding to a latest resource of the first resource by the time gap.6.The method of claim 5, wherein the configuration information further includes information on a number of the time instances,wherein, in case that the number of the time instances is greater than 1, the time gap is applied between two consecutive time instances among the time instances and the CSI report includes a time instance indicator corresponding to a largest predicted value of a predicted reference signal received power (RSRP) of the time instances.7.The method of claim 6, wherein the CSI report includes CSI fields in an order of the time instance indicator, predicted CSI-RS resource indicators (CRIs), and predicted reference signal received powers (RSRPs),wherein the predicted CRIs are ordered in ascending order of the time instances, andwherein the predicted RSRPs are ordered in ascending order of the time instances.8.The method of claim 5, wherein the reference time corresponds to a latest CSI-reference signal (RS) transmission occasion no later than a CSI refence resource of the CSI report.9.A user equipment (UE) comprising:at least one transceiver;at least one processor communicatively coupled to the at least one transceiver; andat least one memory, communicatively coupled to the at least one processor, storing instructions executable by the at least one processor individually or in any combination to cause the UE to:receive, from a base station, configuration information on a channel state information (CSI) report, wherein the configuration information includes first information on a first resource for a channel measurement, second information on a second resource for a prediction of a report quantity, and third information on a time gap,perform the prediction of the report quantity for the second resource for time instances, based on the channel measurement for the first resource, andtransmit, to the base station, the CSI report including information on the report quantity,wherein an earliest time instance of the time instances is after a reference time corresponding to a latest resource of the first resource by the time gap.10.The UE of claim 9, wherein the configuration information further includes information on a number of the time instances,wherein, in case that the number of the time instances is greater than 1, the time gap is applied between two consecutive time instances among the time instances and the CSI report includes a time instance indicator corresponding to a largest predicted value of a predicted reference signal received power (RSRP) of the time instances.11.The UE of claim 10, wherein the CSI report includes CSI fields in an order of the time instance indicator, predicted CSI-RS resource indicators (CRIs), and predicted reference signal received powers (RSRPs),wherein the predicted CRIs are ordered in ascending order of the time instances, andwherein the predicted RSRPs are ordered in ascending order of the time instances.12.The UE of claim 9, wherein the reference time corresponds to a latest CSI-reference signal (RS) transmission occasion no later than a CSI refence resource of the CSI report.13.A base station comprising:at least one transceiver;at least one processor communicatively coupled to the at least one transceiver; andat least one memory, communicatively coupled to the at least one processor, storing instructions executable by the at least one processor individually or in any combination to cause the base station to:transmit, to a user equipment (UE), configuration information on a channel state information (CSI) report, wherein the configuration information includes first information on a first resource for a channel measurement, second information on a second resource for a prediction of a report quantity, and third information on a time gap, andreceive, from the UE, the CSI report including information on the report quantity,wherein the prediction of the report quantity for the second resource for time instances is based on the channel measurement for the first resource, andwherein an earliest time instance of the time instances is after a reference time corresponding to a latest resource of the first resource by the time gap.14.The base station of claim 13, wherein the configuration information further includes information on a number of the time instances,wherein, in case that the number of the time instances is greater than 1, the time gap is applied between two consecutive time instances among the time instances and the CSI report includes a time instance indicator corresponding to a largest predicted value of a predicted reference signal received power (RSRP) of the time instances.15.The base station of claim 14, wherein the CSI report includes CSI fields in an order of the time instance indicator, predicted CSI-RS resource indicators (CRIs), and predicted reference signal received powers (RSRPs),wherein the predicted CRIs are ordered in ascending order of the time instances, andwherein the predicted RSRPs are ordered in ascending order of the time instances.

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