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. The disclosure provides a method performed by a user equipment (UE), comprising: receiving, from a base station, information for a channel state information (CSI) - reference signal (RS) resource set; receiving, from the BS, information for a CSI report associated with the CSI-RS resource set; in case that the information for CSI report includes the value, M, identifying a PUCCH resource and a number of PRBs for the PUCCH resource assuming that sub-reports corresponding to M CSIs in the CSI report indicate a predefined rank; transmitting, to the BS, the CSI report including the M CSIs on the PUCCH resource.

Description

METHOD AND DEVICE FOR RECEIVING AND TRANSMITTING INFORMATION

[0001] The present application relates to the technical field of wireless communication, and more specifically, 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 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] 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".

[0009] 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.

[0010] 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.

[0011] 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.

[0012] In order to enhance the scheduling efficiency of the wireless communication system, a base station needs to obtain channel state information (CSI) to schedule according to the CSI fed back by a terminal equipment. However, how to further enhance the performance of CSI reporting is a problem to be solved.

[0013] 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 for SBFD indicates an uplink subband and a downlink subband; receiving a channel state information CSI reporting configuration, wherein the CSI reporting configuration is associated with K resources for cross-link interference CLI measurement, and the CSI reporting configuration includes information indicating S subbands in the downlink subband or the uplink subband K 1, S 1; and reporting the CSI based on the CSI reporting configuration, wherein the CSI includes CSI associated with each of the S subbands for each of N strongest and / or N weakest of the K resources for the CLI measurement, or CSI associated with a subset of subbands of the S subbands for each of the N strongest and / or the N weakest of the K resources for the CLI measurement, N K.

[0014] In an example, the frequency domain position of the S subbands is determined based on the uplink subband or the downlink subband; and / or the granularity of the S subbands is determined based on a size of the uplink subband or a size of the downlink subband.

[0015] In an example, when the frequency domain resource corresponding to the downlink subband includes two downlink subbands and the resources for the CLI measurement are in the two downlink subbands, the S subbands include subband #1 and subband #2, wherein the subband #1 includes a part of a first type of resource associated with received signal strength indication RSSI in a first subband of the two downlink subbands and in a downlink bandwidth part BWP; and the subband #2 includes a part of the first type of resource associated with the received signal strength indication RSSI in a second subband of the two downlink subbands and in the downlink BWP.

[0016] In an example, the first subband of the two downlink subbands includes a subband with a lower frequency domain position in the two downlink subbands; the second subband of the two downlink subbands includes a subband with a higher frequency domain position in the two downlink subbands.

[0017] In an example, when types of the K resources for the CLI measurement are the second type associated with reference signal received power RSRP, the S subbands are in the uplink subband and / or the S subbands are determined based on the size of the uplink subband; or when the types of the K resources for the CLI measurement are the first type associated with received signal strength indication RSSI, the S subbands are in the downlink subband and / or the S subbands are determined based on the size of the downlink subband.

[0018] In an example, the CSI further includes a second indicator indicating a subband with the largest Layer 1 quantity associated with the CLI of the S subbands.

[0019] In an example, the CSI reporting configuration includes a second parameter indicating a number Srepof reported subbands, Srep 1; and the subset of subbands include the strongest Srepsubbands of the S subbands, or the weakest Srepsubbands of the S subbands, or the weakest Srepsubbands and the strongest Srepsubbands of the S subbands, wherein the strongest Srepsubbands are the Srepsubbands with the highest Layer 1 quantity of the S subbands, and the weakest Srepsubbands are the Srepsubbands with the lowest Layer 1 quantity of the S subbands.

[0020] In an example, the CSI further includes Srepfirst indicators, wherein each first indicator indicates one of the S subbands.

[0021] In an example, the CSI reporting configuration includes a parameter indicating a strength type of a resource reported by the UE; wherein when the parameter indicates that the resource reported by the UE is the strongest resource, the CSI includes CSI associated with the N strongest resources of the K resources for the CLI measurement; or when the parameter indicates that the resource reported by the UE is the weakest resource, the CSI includes CSI associated with the N weakest resources of the K resources for the CLI measurement; or when the parameter indicates that the resource reported by the UE is the weakest resources and the strongest resources, the CSI includes CSI associated with the N weakest resources and the N strongest resources of the K resources for the CLI measurement.

[0022] In an example, when the types of the K resources for the CLI measurement are the second type associated with reference signal received power RSRP, report CSI associated with the strongest N resources of the K resources for the CLI measurement; when the types of the K resources for the CLI measurement are the first type associated with received signal strength indication RSSI, report the CSI associated with the weakest N resources of the K resources for the CLI measurement; when the types of the K resources for the CLI measurement include the first type and the second type, report the CSI associated with the strongest N resources of the second type of the K resources for the CLI measurement and CSI associated with the weakest N resources of the first type of the K resources for the CLI measurement.

[0023] In an example, the strength of each resource of the K resources for the CLI measurement is determined based on an average value of Layer 1 quantities associated with CLI in the S subbands and / or on each subband of the subset of subbands for each resource; or the strength of the K resources for the CLI measurement is determined based on the subband with the highest or lowest Layer 1 quantity value associated with CLI in the S subbands and / or the subset of subbands for the K resources for the CLI measurement.

[0024] In an example, the subset of subbands are determined as the strongest Srepsubbands of the S subbands, or the weakest Srepsubbands of the S subbands, or the weakest Srepsubbands and the strongest Srepsubbands of the S subbands, based on the parameter indicating the strength type of the resource reported by the UE or the type of the K resources for the CLI measurement.

[0025] In an example, the order of the CSI is determined based on one of the indexes of the S subbands; the indexes of the Srepsubbands.

[0026] In an example, the CSI reporting configuration includes a first parameter indicating the number of the reported resources.

[0027] In an example, the priority of the CSI is determined based on the types of the K resources for the CLI measurement.

[0028] In an example, the configuration information for the SBFD further indicates a time domain resource for the SBFD; and a time domain unit where the CSI reference resource associated with the CSI reporting configuration is located is determined based on the type of the time domain resource for the SBFD and / or the K resources for the CLI measurement.

[0029] In an example, the method further includes receiving an indicated transmission configuration indication TCI state; and when the difference of the Layer 1-reference signal received power L1-RSRP of the reference signal resource associated with the indicated TCI state and the Layer 1-sounding reference signal-reference signal received power L1-SRS-RSRP associated with the K resources for the CLI measurement is greater than or equal to a threshold, reporting the CSI.

[0030] In an example, the L1-SRS-RSRP associated with the K resource for the CLI measurement include one of L1-SRS-RSRP of all of the K resources for the CLI measurement; the L1-SRS-RSRP with the lowest value of the L1-SRS-RSRP of all of the K resources for the CLI measurement; the L1-SRS-RSRP with the highest value of the L1-SRS-RSRP of all of the K resources for the CLI measurement.

[0031] In an example, the TCI state of each of the K resources for the CLI measurement is the indicated TCI state.

[0032] 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 SBFD indicates an uplink subband and a downlink subband; transmitting a channel state information CSI reporting configuration, wherein the CSI reporting configuration is associated with K resources for cross-link interference CLI measurement, and information indicating S subbands in the downlink subband or the uplink subband K 1, S 1; and receiving CSI determined based on the CSI reporting configuration, wherein the CSI includes CSI associated with each of the S subbands for each of N strongest and / or N weakest of the K resources for the CLI measurement, or CSI associated with a subset of subbands of the S subbands for each of the N strongest and / or the N weakest of the K resources for the CLI measurement, N K.

[0033] In an example, the frequency domain position of the S subbands is determined based on the uplink subband or the downlink subband; and / or the granularity of the S subbands is determined based on a size of the uplink subband or a size of the downlink subband.

[0034] In an example, when the frequency domain resource corresponding to the downlink subband includes two downlink subbands and the resources for the CLI measurement are in the two downlink subbands, the S subbands include subband #1 and subband #2, wherein the subband #1 includes a part of a first type of resource associated with received signal strength indication RSSI in a first subband of the two downlink subbands and in a downlink bandwidth part BWP; and the subband #2 includes a part of the first type of resource associated with the received signal strength indication RSSI in a second subband of the two downlink subbands and in the downlink BWP.

[0035] In an example, the first subband of the two downlink subbands includes a subband with a lower frequency domain position in the two downlink subbands; the second subband of the two downlink subbands includes a subband with a higher frequency domain position in the two downlink subbands.

[0036] In an example, when types of the K resources for the CLI measurement are the second type associated with reference signal received power RSRP, the S subbands are in the uplink subband and / or the S subbands are determined based on the size of the uplink subband; or when the types of the K resources for the CLI measurement are the first type associated with received signal strength indication RSSI, the S subbands are in the downlink subband and / or the S subbands are determined based on the size of the downlink subband.

[0037] In an example, the CSI further includes a second indicator indicating a subband with the largest Layer 1 quantity associated with the CLI of the S subbands.

[0038] In an example, the CSI reporting configuration includes a second parameter indicating a number Srepof reported subbands, Srep 1; and the subset of subbands include the strongest Srepsubbands of the S subbands, or the weakest Srepsubbands of the S subbands, or the weakest Srepsubbands and the strongest Srepsubbands of the S subbands, wherein the strongest Srepsubbands are the Srepsubbands with the highest Layer 1 quantity of the S subbands, and the weakest Srepsubbands are the Srepsubbands with the lowest Layer 1 quantity of the S subbands.

[0039] In an example, the CSI further includes Srepfirst indicators, wherein each first indicator indicates one of the S subbands.

[0040] In an example, the CSI reporting configuration includes a parameter indicating a strength type of a resource reported by the UE; wherein when the parameter indicates that the resource reported by the UE is the strongest resource, the CSI includes CSI associated with the N strongest resources of the K resources for the CLI measurement; or when the parameter indicates that the resource reported by the UE is the weakest resource, the CSI includes CSI associated with the N weakest resources of the K resources for the CLI measurement; or when the parameter indicates that the resource reported by the UE is the weakest resources and the strongest resources, the CSI includes CSI associated with the N weakest resources and the N strongest resources of the K resources for the CLI measurement.

[0041] In an example, when the types of the K resources for the CLI measurement are the second type associated with reference signal received power RSRP, report CSI associated with the strongest N resources of the K resources for the CLI measurement; when the types of the K resources for the CLI measurement are the first type associated with received signal strength indication RSSI, report the CSI associated with the weakest N resources of the K resources for the CLI measurement; when the types of the K resources for the CLI measurement include the first type and the second type, report the CSI associated with the strongest N resources of the second type of the K resources for the CLI measurement and CSI associated with the weakest N resources of the first type of the K resources for the CLI measurement.

[0042] In an example, the strength of each resource of the K resources for the CLI measurement is determined based on an average value of Layer 1 quantities associated with CLI in the S subbands and / or on each subband of the subset of subbands for each resource; or the strength of the K resources for the CLI measurement is determined based on the subband with the highest or lowest Layer 1 quantity value associated with CLI in the S subbands and / or the subset of subbands for the K resources for the CLI measurement.

[0043] In an example, the subset of subbands are determined as the strongest Srepsubbands of the S subbands, or the weakest Srepsubbands of the S subbands, or the weakest Srepsubbands and the strongest Srepsubbands of the S subbands, based on the parameter indicating the strength type of the resource reported by the UE or the type of the K resources for the CLI measurement.

[0044] In an example, the order of the CSI is determined based on one of the indexes of the S subbands; the indexes of the Srepsubbands.

[0045] In an example, the CSI reporting configuration includes a first parameter indicating the number of the reported resources.

[0046] In an example, the priority of the CSI is determined based on the types of the K resources for the CLI measurement.

[0047] In an example, the configuration information for the SBFD further indicates a time domain resource for the SBFD; and a time domain unit where the CSI reference resource associated with the CSI reporting configuration is located is determined based on the type of the time domain resource for the SBFD and / or the K resources for the CLI measurement.

[0048] In an example, the method further includes transmitting an indicated transmission configuration indication TCI state; and when the difference of the Layer 1-reference signal received power L1-RSRP of the reference signal resource associated with the indicated TCI state and the Layer 1-sounding reference signal-reference signal received power L1-SRS-RSRP associated with the K resources for the CLI measurement is greater than or equal to a threshold, receiving the CSI.

[0049] In an example, the L1-SRS-RSRP associated with the K resource for the CLI measurement include one of L1-SRS-RSRP of all of the K resources for the CLI measurement; the L1-SRS-RSRP with the lowest value of the L1-SRS-RSRP of all of the K resources for the CLI measurement; the L1-SRS-RSRP with the highest value of the L1-SRS-RSRP of all of the K resources for the CLI measurement.

[0050] In an example, the TCI state of each of the K resources for the CLI measurement is the indicated TCI state.

[0051] 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.

[0052] 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.

[0053] The method and device provided in the application improve the performance of CSI, improving the scheduling efficiency of the communication system.

[0054] 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.

[0055] FIG. 1 illustrates an overall structure of an example wireless communication network according to various embodiments of the disclosure;

[0056] FIG. 2a respectively illustrates a transmission path 200 in a wireless communication network according to various embodiments of the disclosure;

[0057] FIG. 2b respectively illustrates a reception path 250 in a wireless communication network according to various embodiments of the disclosure;

[0058] FIG. 3a respectively illustrates a structure of a user equipment (UE) in a wireless communication network according to various embodiments of the disclosure;

[0059] FIG. 3b respectively illustrates a structure of a base station in a wireless communication network according to various embodiments of the disclosure;

[0060] FIG. 4 illustrates a method 400 performed by a user equipment (UE) according to various embodiments of the disclosure;

[0061] FIG. 5 illustrates a method 500 performed by a base station according to various embodiments of the disclosure;

[0062] FIG. 6 illustrates a structure 600 of a user equipment according to various embodiments of the disclosure;

[0063] FIG. 7 illustrates a structure 700 of a base station according to various embodiments of the disclosure.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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).

[0074] 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.

[0075] 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.

[0076] As will be described in more detail below, one or more of gNB 101, gNB 102, and gNB 103 include a 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.)

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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).

[0089] 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.

[0090] 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 or microcontroller.

[0091] 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.

[0092] 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).

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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 or microcontroller.

[0099] 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.

[0100] 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 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.

[0101] 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.

[0102] 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.

[0103] 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).

[0104] In the disclosure, the term "channel state information (CSI)" may be used interchangeably with the terms "CSI parameter" or "CSI quantity".

[0105] In the disclosure, CSI may include at least one of: 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.

[0106] 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".

[0107] In the disclosure, the CSI may be the CSI reported by the UE in a report, or in a report instance.

[0108] In the disclosure, the term "reference signal" may be used interchangeably with the term "reference signal resource".

[0109] In the disclosure, the reference signal may include at least one of: 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: 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: 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: a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH). Optionally, the control channel may include at least one of: 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: 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: 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).

[0110] In the disclosure, the term "beam" may include at least one of: "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.

[0111] 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.

[0112] 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.

[0113] 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: 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.

[0114] 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.

[0115] 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: 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.

[0116] 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".

[0117] 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".

[0118] 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".

[0119] In the disclosure, a time domain resource may include / correspond to several time domain units.

[0120] 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.

[0121] In the disclosure, a frequency domain resource may include / correspond to several frequency domain units.

[0122] 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).

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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".

[0127] In the disclosure, the term "PDCCH" may be used interchangeably with the term "PDCCH candidate".

[0128] 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".

[0129] 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".

[0130] 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".

[0131] In the disclosure, the term "downlink control information (DCI)" may be used interchangeably with the terms "DCI format" or "control information for downlink".

[0132] In the disclosure, the term "uplink control information (UCI)" may be used interchangeably with the term "control information for uplink".

[0133] In the disclosure, detecting DCI includes: receiving and / or decoding DCI.

[0134] 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.

[0135] 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.

[0136] In the disclosure, the term "size of information field" may be used interchangeably with the terms "bitwidth of information field" or "number of information bits in information field".

[0137] 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.

[0138] In the disclosure, the existence of an information field may be that the size of the information field is greater than 0 bits. The absence of an information field may be that the size of the information field is equal to 0 bits.

[0139] 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.

[0140] In the disclosure, monitoring a PDCCH candidate may be receiving the PDCCH candidate and / or decoding according to the monitored DCI format.

[0141] In the disclosure, the DCI format may be at least one of: 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.

[0142] In the disclosure, hybrid automatic repeat request (HARQ) information may be hybrid automatic repeat request-acknowledgement (HARQ-ACK) information.

[0143] 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).

[0144] 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.

[0145] 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.

[0146] 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".

[0147] In the disclosure, a cell includes at least one of: a serving cell, a candidate cell, a primary cell, a secondary cell, and a special cell.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] 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".

[0152] 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".

[0153] In the disclosure, the term "subband non-overlapping duplex" may be used interchangeably with "subband full duplex".

[0154] 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".

[0155] 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"

[0156] 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"

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] 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"

[0162] In the disclosure, the term "SBFD cell" may be used interchangeably with "SBFD serving cell".

[0163] In the disclosure, the term "parameter" may be used interchangeably with "information."

[0164] Embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0165] FIG. 4 illustrates a method 400 performed by a user equipment (UE) according to various embodiments of the disclosure. The method 400 includes: at 401, the UE receives a CSI reporting configuration from a base station, where the CSI reporting configuration indicates K resources for cross-link interference (CLI) measurement, K 1; and at 402, the UE reports CSI based on the CSI reporting configuration, where the CSI includes CSI associated with the weakest N resources and / or the strongest N resources of the K resources for the CLI measurement, where N K. Each operation is described in detail below.

[0166] 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 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.

[0167] ● 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.

[0168] ■　 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.

[0169] ● Optionally, the SBFD configuration information may configure / 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).

[0170] ■ 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 group of consecutive PRBs. Optionally, the frequency domain resource corresponding to the downlink subband may include one or more PRBs, or one or two groups of consecutive PRBs. Optionally, the frequency domain resource corresponding to the guardband may include one PRB or a group of consecutive PRBs or two groups 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 groups of consecutive PRBs.

[0171] ◆ 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.

[0172] ◆ 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.

[0173] ◆ 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.

[0174] ◆ 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.

[0175] ■ 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).

[0176] ◆ 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.

[0177] ◆ 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.

[0178] ◆ Optionally, on the BWP, if a symbol / slot partially overlaps 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 fully overlaps 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.

[0179] 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). Methods for measuring and / or reporting the CLI are discussed below so that the base station may know the strength of the inter-UE CLI in order for the base station to reduce or avoid the inter-UE CLI.

[0180] In some cases, the UE may obtain / receive / be configured with the CSI reporting configuration. Optionally, the CSI reporting configuration may be for the cross link interference (CLI) measurement. Such CSI reporting configuration may be referred as the CSI reporting configuration for the CLI measurement. The UE needs the measurement of the resources in order to determine / report the corresponding CSI. The resources associated with the CSI reporting configuration are discussed below. Optionally, the resources associated with the CSI reporting configuration include the resources for interference measurement. Optionally, the interference measurement may be the CLI measurement. Optionally, the resources for interference measurement include sounding reference signal-reference signal received power (SRS-RSRP) resources and / or CLI received signal strength indication (CLI-RSSI) resources. Optionally, the CLI-RSSI resource may be CSI-IM and / or CSI-RS. Optionally, the CLI-RSSI resource may be CSI-IM and / or ZP CSI-RS. 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. Similarly, L1-CLI-RSSI described below may be referred as a first type Layer 1 quantity, and L1-SRS-RSRP may be referred as a second type Layer 1 quantity, but the names of these two types of Layer 1 quantities 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.

[0181] Optionally, the time domain behaviour of a CLI-RSSI resource may be periodic, semi-persistent, or aperiodic. Optionally, the time domain behaviour 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.

[0182] 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:

[0183] ● 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).

[0184] ● The subcarrier spacing. Optionally, the subcarrier spacing may be configured by the higher layer parameter (rssi-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.

[0185] ● 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.

[0186] ■ 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.

[0187] ■ 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.

[0188] ● 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 groups 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 group 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.

[0189] ■ 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.

[0190] ■ 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.

[0191] ● 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.

[0192] ● 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.

[0193] ● 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.

[0194] ● 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.

[0195] ● 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.

[0196] ● 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.

[0197] ■ 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.

[0198] ■ 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.

[0199] ■ 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.

[0200] 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).

[0201] 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.

[0202] Optionally, 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.

[0203] 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), and 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.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] 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-overlapping. 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.

[0208] The configuration method of a CLI-RSSI resource set is discussed below. Optionally, a CLI-RSSI resource set may include / be associated with one or more CLI-RSSI resources. Optionally, a CLI-RSSI resource set may be configured by CLI-RSSI resource set configuration information. Optionally, the CSI reporting configuration may be associated with one or more CLI-RSSI resource sets. Optionally, the CSI reporting configuration may be associated with one or more CLI-RSSI resource sets for interference measurement and / or reporting. Optionally, the CSI reporting configuration may be associated with one or more CLI-RSSI resource sets and interference measurement and / or reporting is performed based on the CLI-RSSI resources in the one or more CLI-RSSI resource sets. For example, the CSI reporting configuration may be associated with / include / refer / indicate one or more CLI-RSSI resource set configuration information. For example, the CSI reporting configuration may be associated with / include / refer / indicate one or more CLI-RSSI resource set IDs. A CLI-RSSI resource set configuration information may include / configure / indicate at least one of the followings:

[0209] ● A resource set ID. Optionally, the ID is used for identifying the CLI-RSSI resource set. Optionally, the resource ID may be configured by a higher layer parameter.

[0210] ● One or more CLI-RSSI resources. Optionally, the one or more CLI-RSSI resources are resources associated with / included in the CLI-RSSI resource set. Optionally, the one or more CLI-RSSI resources may be configured by a higher layer parameter. Optionally, the higher layer parameter may configure the IDs of the one or more CLI-RSSI resources to be associated with the CLI-RSSI resource set.

[0211] ● 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, the 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 may 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. The following description of the CLI-RSSI resource is applicable to each CLI-RSSI resource in the CLI-RSSI resource set.

[0212] ■ 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.

[0213] ■ 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.

[0214] ■ 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, or the measurement / reception of the CLI-RSSI resource 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 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, or the measurement / reception of the CLI-RSSI resource is not determined based on the quasi co-location parameter associated with the indicated TCI state). Optionally, the quasi co-location may be type D quasi co-location. Refer below for description of the indicated TCI state.

[0215] ● 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 the time domain unit where the CLI-RSSI resource is located. 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 set 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 set 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. The above behaviour associated with the time domain offset of the CLI-RSSI resource is applicable to each CLI-RSSI resource in the CLI-RSSI resource set.

[0216] 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:

[0217] ● 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.

[0218] ● 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.

[0219] ● 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).

[0220] ● 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.

[0221] ● 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.

[0222] ● 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.

[0223] ● 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.

[0224] ■ 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.

[0225] ■ 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.

[0226] ■ 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.

[0227] 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.

[0228] 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.

[0229] 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.

[0230] 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.

[0231] 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.

[0232] 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.

[0233] 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.

[0234] The configuration method of the SRS-RSRP resource set is discussed below. Optionally, an SRS-RSRP resource set may include / be associated with one or more SRS-RSRP resources. Optionally, an SRS-RSRP resource set may be configured by SRS-RSRP resource set configuration information. Optionally, the CSI reporting configuration may be associated with one or more SRS-RSRP resource sets. Optionally, the CSI reporting configuration may be associated with one or more SRS-RSRP resource sets for interference measurement and / or reporting. Optionally, the CSI reporting configuration may be associated with one or more SRS-RSRP resource sets and the interference measurement and / or reporting is performed based on the SRS-RSRP resources in the one or more SRS-RSRP resource sets. For example, the CSI reporting configuration may be associated with / include / refer / indicate one or more SRS-RSRP resource set configuration information. For example, the CSI reporting configuration may be associated with / include / refer / indicate one or more SRS-RSRP resource set IDs. An SRS-RSRP resource set configuration information may include / configure / indicate at least one of the followings:

[0235] ● A resource set ID. Optionally, the ID is used for identifying the SRS-RSRP resource set. Optionally, the resource ID may be configured by a higher layer parameter.

[0236] ● One or more SRS-RSRP resources. Optionally, the one or more SRS-RSRP resources are resources associated with / included in the SRS-RSRP resource set. Optionally, the one or more SRS-RSRP resources may be configured by a higher layer parameter. Optionally, the higher layer parameter may configure the IDs of one or more SRS-RSRP resources to be associated with the SRS-RSRP resource set.

[0237] ● 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 may 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. The following description of the SRS-RSRP resource is applicable to each SRS-RSRP resource in the SRS-RSRP resource set.

[0238] ■ 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 measurement / reception 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 measurement / reception of the SRS-RSRP resources 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.

[0239] ■ 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.

[0240] ■ 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 measurement / reception of the SRS-RSRP resources may be 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, or the measurement / reception of the SRS-RSRP resources may / may not be determined based on the quasi co-location parameter associated with the indicated TCI state). Optionally, the quasi co-location may be type D quasi co-location. Refer below for description of the indicated TCI state.

[0241] ● 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 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. Optionally, the time domain offset indicates the offset of the time domain units between the triggering DCI and the SRS-RSRP resource. In time domain, the UE determines the slot where the (aperiodic) SRS-RSRP resource is located based on the time domain offset configured by the SRS-RSRP resource set configuration information. In time domain, the slot where the (aperiodic) SRS-RSRP resource is located is determined based on the time domain offset configured by the SRS-RSRP resource set configuration information. Optionally, if the UE may detect / receive DCI for triggering the aperiodic SRS-RSRP resource in slot n, the aperiodic SRS-RSRP resource is in slot n+k, where k represents the time domain offset. The above behaviour associated with the time domain offset of the SRS-RSRP resource is applicable to each SRS-RSRP resource in the SRS-RSRP resource set.

[0242] Optionally, the CSI reporting configuration may indicate / configure / be associated with / correspond to (a) resource set. In the disclosure, the term "resource set" may be interchangeable with the term "resource list." Optionally, the CSI reporting configuration may indicate / configure / be associated with / correspond to K (K 1) resources for the CLI measurement (e.g., CLI-RSSI resources and / or SRS-RSRP resources). Optionally, the resource set may be for interference measurement (e.g., CLI measurement). Optionally, the resource set may be configured by a higher layer parameter. Optionally, the resources in the resource set may be SRS-RSRP resources and / or CLI-RSSI resources. Optionally, the resource set may be associated with K (K 1) resources.

[0243] ● Optionally, the K resources may be (all) the resources in the resource set. For example, the resource set includes K resources.

[0244] ● Optionally, the K resources may be the K resources in the resource set determined based on the base station indication. Optionally, the K resources are a subset of the resource set indicated by the base station. Optionally, the base station indication may be at least one of DCI indication, MAC-CE indication, and higher layer signaling indication.

[0245] ● Optionally, the K resources may be the K resources in the resource set determined based on the indicated TCI state. Optionally, (based on the indication / configuration of the base station,) one or more subsets of the resource set may each be associated with a TCI state. Optionally, the resources in the subset corresponding to the TCI state same as the indicated TCI state are the K resources (associated with the resource set). For example, the resource set includes {CLI-RSSI resource #1, CLI-RSSI resource #2, CLI-RSSI resource #3}, where CLI-RSSI resource #1 is associated with TCI state #1, and CLI-RSSI resource #2 and CLI-RSSI resource #3 are associated with TCI state #2. When the indicated TCI state is TCI #state 2, the K resources associated with the resource set are CLI-RSSI resource #2 and CLI-RSSI resource #3. Here, refer below for description of the indicated TCI state.

[0246] 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.

[0247] 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):

[0248] ● 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;

[0249] ● 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.

[0250] 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.

[0251] 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):

[0252] ● 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;

[0253] ● 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.

[0254] 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.

[0255] Optionally, the CSI reporting configuration is associated with resources for the CLI measurement. Optionally, the resources for the CLI measurement include K (K 1) resources for the CLI measurement. Optionally, the resources for the CLI measurement may include SRS-RSRP resources and / or CLI-RSSI resources. Refer above for a description of the resources for the CLI measurement. Optionally, the CSI reporting configuration may be associated with a resource set. Optionally, the CSI reporting configuration may be associated with / configure / indicate the ID of the resource set. Here, refer above for the association between K resources for the CLI measurement and the resource set.

[0256] How the UE reports the CSI is discussed below. Optionally, the report quantity parameter (e.g., reportQuantity) associated with the CSI reporting configuration is not set to "none". Optionally, the CSI report corresponding to the CSI reporting configuration may include L1 quantity. In the disclosure, the term "L1 quantity" may be used interchangeably with "the value of the L1 quantity". Optionally, the L1 quantity may be the quantity for the CLI measurement. Optionally, the L1 quantity may be the quantity for SRS-RSRP resources, and / or the quantity for CLI-RSSI resources. Optionally, the L1 quantity may be L1-SRS-RSRP, or L1-CLI-RSSI. Optionally, L1-SRS-RSRP is obtained by the UE through measurement of SRS-RSRP resources. Optionally, L1-CLI-RSSI is obtained based on measurement of CLI-RSSI resources. Optionally, the UE may determine the CSI and / or report the CSI and / or report the CSI report based on the CSI reporting configuration. In the disclosure, the CSI (the CSI associated with CLI) may include at least one of a resource indicator, a first indicator, a second indicator, L1-SRS-RSRP and L1-CLI-RSSI. Relevant description of the first indicator and the second indicator is described below. Optionally, the resource indicator may include a CLI-RSSI resource indicator and / or an SRS-RSRP resource indicator. Here, the resource indicator is used for indicating the SRS-RSRP resources and / or the CLI-RSSI resources. The SRS-RSRP resource indicator is used for indicating the SRS-RSRP resources. Here, the CLI-RSSI resource indicator is used for indicating the CLI-RSSI resources.

[0257] Optionally, the UE may obtain a first number (N) of (reported) resources, where N 1. Optionally, the resource may be a measured resource. Optionally, the reported resource may be information associated with the reported resource, or the CSI associated with the reported resource. Optionally, N may be indicated by higher layer signaling / higher layer parameter. Optionally, N may be indicated by the CSI reporting configuration. For example, N may be indicated by a first parameter (of the CSI reporting configuration). Optionally, the first parameter may be used for indicating the number of resources reported by the UE. Optionally, N may be indicated by DCI and / or MAC-CE. Optionally, N N_max, where N_max is determined based on the UE capability. Optionally, N_max represents the maximum number of (reported) resources supported by the UE as indicated by the UE capability. Optionally, N K. Optionally, the value of N is less than or equal to at least one of the followings: N_max and the minimum value of K. The above method defines the indication method and value range of N, so that the UE and the base station have the same understanding of N, improving the reliability of the communication system. Optionally, the CSI reported by the UE based on the first parameter (included in the CSI reporting configuration) may include the CSI associated with N resources. Optionally, the N resources may be N resources of the K resources. Optionally, the UE reports The CSI associated with the N resources in one report instance based on the base station indication (or based on the first parameter). Optionally, the CSI may be the CSI associated with CLI (or CLI measurement). Optionally, the CSI may include N resource indicators and / or the CSI associated with the N resources. In the disclosure, the term "CSI associated with N resources" may be used interchangeably with the term "CSI associated with N resource indicators" or "CSI associated with N reported resources". The CSI associated with the N resources includes: L1 quantities associated with the N resources (e.g., L1-SRS-RSRP and / or L1-CLI-RSSI) and / or N first indicators and / or a second indicator. Optionally, refer below for the description of the first indicator and the second indicator. Optionally, the bitwidth of the CSI field corresponding to / associated with one / each of the N resource indicators is determined based on K. For example, the bitwidth is or . Optionally, the N resources may be the strongest N resources of the K resources, or the weakest N resources of the K resources, or the weakest N resources and the strongest N resources of the K resources.

[0258] How to determine whether the reported N resources are the strongest N resources of the K resources, or the weakest N resources, or the weakest N resources and the strongest N resources is discussed below. Optionally, the UE may determine based on the base station indication (for example, CSI reporting configuration, or higher layer parameter) that the reported N resources are the strongest N resources of the K resources or the weakest N resources of the K resources (or the weakest N resources and the strongest N resources of the K resources).

[0259] ● Optionally, the UE determines N resources from the K resources based on a higher layer parameter. Optionally, the N resources are determined based on the K resources. Optionally, the N resources are resources of the K resources. Optionally, the CSI reporting configuration is associated with / includes a strength type parameter. Optionally, the strength type parameter indicates the UE to report the strongest resource, or to report the weakest resource (or to report the strongest resource and the weakest resource). Optionally, the strength type parameter indicates the strength of (corresponding to) the resource reported by the UE. Optionally, the strength type parameter indicates the strength type of (corresponding to) the resource reported by the UE. Optionally, the strength type parameter may indicate the strongest, the weakest, or the strongest and the weakest. Optionally, the UE determines the N resources for reporting from the K resources based on the strength type parameter. Optionally, the N resources for reporting are determined from the K resources based on the strength type parameter. For example, when the strength type parameter indicates the UE to report the strongest resource, the UE reports the CSI associated with the strongest N resources of the K resources. For example, when the strength type parameter indicates the UE to report the weakest resource, the UE reports the CSI associated with the weakest N resources of the K resources. For example, when the strength type parameter indicates the UE to report the strongest resource and the weakest resource, the UE reports the CSI associated with the strongest N resources and the weakest N resources of the K resources. For example, when the strength type parameter indicates that the resource reported by the UE is the strongest resource, the CSI reported by the UE includes the CSI associated with the N strongest resources of the K resources for the CLI measurement. For example, when the strength type parameter indicates that the resource reported by the UE is the weakest resource, the CSI reported by the UE includes the CSI associated with the N weakest resources of the K resources for the CLI measurement. For example, when the strength type parameter indicates that the resource reported by the UE is the weakest resource and the strongest resource, the CSI reported by the UE includes the CSI associated with the N weakest resources and the N strongest resources of the K resources for the CLI measurement.

[0260] ● Optionally, the UE may determine the N resources from the K resources based on resource type (e.g., resource type of the K resources). Optionally, the N resources are determined from the K resources based on the resource type (e.g., the resource type of the K resources). Optionally, the UE determines to report the weakest N resources, or the strongest N resources (or the weakest N resources and the strongest N resources) of the K resources based on the resource type of the K resources. Optionally, the N resources for reporting being the weakest N resources of the K resources, or the strongest N resources (or the weakest N resources and the strongest N resources) are determined based on the resource type of K resources. Optionally, the type of the resources for the CLI measurement includes SRS-RSRP resource and CLI-RSSI resource. Optionally, when the K resources are (all) SRS-RSRP resources, the UE reports the strongest N resources of the K resources. Optionally, when the K resources are (all) CLI-RSSI resources, the UE reports the weakest N resources of the K resources. When the K resources include SRS-RSRP resources and CLI-RSSI resources, the UE reports the strongest N SRS-RSRP resources of the K resources and the weakest N CLI-RSSI resources of the K resources.

[0261] The definition of the strongest / weakest resource is discussed below. Optionally, the strength of a resource may be determined based on the size of (the value of) the L1 quantity in (the measurement bandwidth of) the resource. For example, when the (reported) L1 quantity is a wideband L1 quantity, the strength of the resource may be determined based on the size of (the value of) the L1 quantity in the measurement bandwidth of the resource (or all frequency domain resources occupied by the resource). Optionally, the strongest resource may be the resource with the highest (value of) associated L1 quantity. Optionally, the strongest resource may be the resource with the highest (value of) measured L1 quantity. Optionally, the strongest resource may be the resource with the highest (value of) L1 quantity obtained through measurement. Optionally, the weakest resource may be the resource with the lowest value of the associated L1 quantity. Optionally, the weakest resource may be the resource with the lowest (value of) measured L1 quantity. Optionally, the weakest resource may be the resource with the lowest (value of) L1 quantity obtained through measurement.

[0262] The above method defines the criteria for selecting / obtaining N resources from the K resources, so that the UE and the base station have the same understanding of the characteristics of the selected N resources, improving the reliability of the communication system.

[0263] The reporting method of the CSI associated with the N resources is discussed below. Optionally, the CSI associated with the N resources may include / be associated with / indicate L1 quantities associated with / corresponding to the N resources. Optionally, the L1 quantities associated with / corresponding to the N resources may be wideband L1 quantities and / or subband L1 quantities associated with / corresponding to the N resources.

[0264] ● Optionally, the wideband L1 quantity of a resource refers to the L1 quantity obtained based on (measurement of) the measurement bandwidth corresponding to the resource. Optionally, a resource may correspond to / be associated with a corresponding wideband L1 quantity. For example, wideband L1 quantities associated with the N resources may be N L1 quantities (e.g., N wideband L1 quantities).

[0265] ● Optionally, the subband L1 quantity of a resource refers to the L1 quantity obtained based on (measurement of) the subband associated with the resource. Optionally, the subband L1 quantity associated with a resource may include / be associated with the subband L1 quantities for S subbands (or for Srepsubbands). Optionally, the subband associated with the resource may be determined based on the CSI reporting configuration associated with the resource. Optionally, the subband associated with the resource may be a subband in the measurement bandwidth of the resource. For example, one or more subbands (e.g., S subbands) may be determined based on the CSI reporting configuration, and for one / each of the N resources, the UE determines / obtains / reports the L1 quantity for each subband (or subset of subbands) of the one or more subbands based on measurement of the one or more subbands. Optionally, a resource may correspond to / be associated with the corresponding S subband L1 quantities. For example, the Subband L1 quantities associated with the N resources may be N*S L1 quantities (e.g., N*S subband L1 quantities). Optionally, a resource may correspond to / be associated with the corresponding Srepsubband L1 quantities, where the Srepsubbands are a subset of the S subbands. For example, the subband L1 quantities associated with the N resources may be N*SrepL1 quantities (e.g., N*Srepsubband L1 quantities). Refer below for the obtaining method of S subbands or Srepsubbands.

[0266] The obtaining / determination method of subbands (for example, S subbands) associated with a resource. Optionally, the UE may obtain S (S 1) subbands. Optionally, the UE may determine S (S 1) subbands based on the base station indication. Optionally, S (S 1) subbands may be determined based on the base station indication. Optionally, the UE may determine Sind(Sind 1) subbands based on (the higher layer parameter, for example, reportFreqConfiguration included in) the CSI reporting configuration. Optionally, (the higher layer parameter, for example, reportFreqConfiguration included in) the CSI reporting configuration may indicate Sind(Sind 1) subbands. For example, the higher layer parameter indicates the Sindsubbands in a bitmap. For example, the Sindsubbands are the subbands indicated by / corresponding to bits "1" in the bitmap. Optionally, the S subbands are the Sindsubbands or a subset of the Sindsubbands.

[0267] Optionally, the S subbands may be in the downlink subband and / or the uplink subband (indicated by the SBFD configuration information) and / or the downlink BWP. Optionally, the S subbands may be subbands of the Sindsubband (fully / partially) in the downlink subband and / or the uplink subband (indicated by the SBFD configuration information) and / or the BWP. In the disclosure, the term "BWP" may be used interchangeably with the term "active BWP".

[0268] ● Optionally, the UE may determine S subbands based on the resource type for the CLI measurement. Optionally, the S subbands may be determined based on the resource type for the CLI measurement. For example, when the K resources are SRS-RSRP resources, the S subbands may be subbands of the Sindsubbands (fully / partially) in the uplink subband (indicated by the SBFD configuration information) and / or the downlink BWP. When the K resources are CLI-RSSI resources, the S subbands may be subbands of the Sindsubbands (fully / partially) in the downlink subband (indicated by the SBFD configuration information) and / or the downlink BWP.

[0269] ● Optionally, when (the resource type of) the K resources is SRS-RSRP resource, the S subbands are in the uplink subband and / or the downlink BWP.

[0270] ● Optionally, when (the resource type of) the K resources is CLI-RSSI resource, the S subbands are in the downlink subband and / or the downlink BWPs.

[0271] Optionally, the frequency domain position of the Sindsubbands (or S subbands) may be determined based on the uplink subband or the downlink subband. Optionally, the bitmap indicated by the higher layer parameter includes X bits, where each of the X bits indicates / corresponds to a subband. Optionally, in X subbands corresponding to the X bits, the subband with the lowest frequency domain position is determined based on the downlink BWP or the downlink subband or the uplink subband. Optionally, when the K resources are CLI-RSSI resources, in the X subbands indicated by the X bits, the subband with the lowest frequency domain position is determined based on the downlink BWP or the downlink subband. For example, the subband with the lowest frequency domain position is a CSI reporting subband (fully / partially) included in the downlink BWP or in the downlink subband. Optionally, when the K resources are SRS-RSRP resources, in the X subbands indicated by the X bits, the subband with the lowest frequency domain position is determined based on the downlink BWP or the uplink subband. For example, the subband with the lowest frequency domain position is the CSI reporting subband (fully / partially) included in the downlink BWP or in the uplink subband.

[0272] Optionally, the frequency domain granularity of the Sindsubbands (or S subbands) is determined based on the size of the uplink subband or the size of the downlink subband. Optionally, the granularity of the subband may be the frequency domain width of the subband or the size of the frequency domain resources occupied by the subband. Optionally, the UE determines the frequency domain granularity of the Sindsubbands (or S subbands) based on the resource type of the K resources. Optionally, the frequency domain granularity of the Sindsubbands (or S subbands) may be determined based on the resource type of the K resources. Optionally, when the K resources are SRS-RSRP resources, the UE determines the frequency domain granularity based on the size of the uplink subband. Optionally, when the K resources are CLI-RSSI resources, the UE determines the frequency domain granularity based on the size of the downlink subband. Optionally, when the K resources are SRS-RSRP resources, the frequency domain granularity is determined based on the size of the uplink subband. Optionally, when the K resources are CLI-RSSI resources, the frequency domain granularity is determined based on the size of the downlink subband.

[0273] A method of determining S subbands based on the SBFD configuration information is discussed below. Optionally, the S subbands are determined based on the downlink subband indicated by the SBFD configuration information. Optionally, the downlink subband may include one or two groups of consecutive PRBs. The one or two groups of PRBs may be called "one or two subbands." Optionally, when the downlink subband includes two downlink subbands, and / or the frequency domain resource of the CLI-RSSI is in the two downlink subbands, the UE may report the subband L1 quantity (for example, subband L1-CLI-RSSI) associated with the frequency domain resource of the CLI-RSSI. Here, the frequency domain resource of the CLI-RSSI being in the two downlink subbands refers to the frequency domain resource of the CLI-RSSI is in the first subband of the two downlink subbands, and the frequency domain resource of the CLI-RSSI is also in the second subband of the two downlink subbands. Optionally, (in this case,) when the CSI reporting configuration indicates subband reporting, S subbands are associated with the two downlink subbands. Optionally, (in this case,) when the CSI reporting configuration indicates the UE to report (the CSI associated with) the two subbands, the S subbands are associated with the two downlink subbands. Optionally, (in this case,) when the CSI reporting configuration indicates the UE to report the subband L1 quantity of (each) CLI-RSSI resource, the S subbands are associated with the two downlink subbands. Optionally, (in this case,) when the CSI reporting configuration indicates the UE to report two subband L1 quantities of (each) CLI-RSSI resource, S subbands are associated with the two downlink subbands. The S subbands being associated with the two downlink subbands refers to including subband #1 and subband #2, and subband #1 is associated with the first subband of the two downlink subbands (for example, the subband with the lower frequency domain position or the subband with the higher frequency domain position), and subband #2 is associated with the second subband of the two downlink subbands (for example, the subband with the higher frequency domain position or the subband with the lower frequency domain position). Optionally, subband #1 being associated with the first subband of the two downlink subbands refers to subband #1 is the first subband of the two downlink subbands, or subband #1 refers to the part of the CLI-RSSI resource in the first subband of the two downlink subbands, or subband #1 refers to the part of the CLI-RSSI resource in the first subband of the two downlink subbands and in the downlink BWP, or subband #1 refers to the part of the first subband of the two downlink subbands in the downlink BWP. Optionally, subband #2 being associated with the second subband of the two downlink subbands refers to subband #2 is the second subband of the two downlink subbands, or subband #2 refers to the part of the CLI-RSSI resource in the second subband of the two downlink subbands, or subband #2 refers to the part of CLI-RSSI resource in the second subband of the two downlink subbands and in the downlink BWP, or subband #2 refers to the part of the second subband of the two downlink subbands in the downlink BWP.

[0274] How the UE reports the obtaining method of subset of subbands (Srepsubbands) associated with a resource is discussed below. The Srepsubbands may be referred to as reported subbands. Optionally, the UE may obtain the number (Srep) of (reported) subbands, where Srep 1. Optionally, the number (Srep) may be indicated based on the base station, or predefined, or based on the UE capability. Optionally, Srepmay be determined based on the CSI reporting configuration. Optionally, the CSI reporting configuration is associated with / includes a second parameter, where the second parameter indicates Srep. Optionally, the UE determines / reports L1 quantities associated with / corresponding to the Srepsubbands associated with each of the N resources. Optionally, the UE determines / reports L1 quantities associated with / corresponding to the Srepsubbands associated with each of the N resources based on Srep(or the second parameter, or the CSI reporting configuration). Optionally, the Srepsubbands may be Srepsubbands of the S subbands. Optionally, the Srepsubbands may be the strongest Srepsubbands (of the S subbands). Optionally, the Srepsubbands may be the weakest Srepsubbands (of the S subbands). Optionally, the Srepsubbands may be the weakest Srepsubbands (of the S subbands) and the strongest Srepsubbands (of the S subbands).

[0275] Optionally, the UE may determine that the Srepsubbands are the strongest Srepsubbands based on the base station indication (for example, the CSI reporting configuration, or the higher layer parameter, or the subband strength type parameter), or the weakest Srepsubbands (or the strongest Srepsubbands and the weakest Srepsubbands) of the S subbands.

[0276] ● Optionally, the Srepsubbands are determined from the S subbands based on the strength type parameter. Refer above for a description of the strength type parameter. Optionally, the UE determines the Srepsubbands for reporting from the S subbands (for each reported resource) based on the strength type parameter. For example, when the strength type parameter indicates the UE to report the strongest resource, the UE reports (for each reported resource) the CSI associated with the strongest Srepsubbands of the S subbands. For example, when the strength type parameter indicates the UE to report the weakest resource, the UE reports (for each reported resource) the CSI associated with the weakest Srepsubbands of the S subbands. For example, when the strength type parameter indicates the UE to report the strongest resource and the weakest resource, the UE reports the CSI associated with the strongest Srepsubbands and the weakest Srepsubbands of the S subbands.

[0277] ● Optionally, the Srepsubbands are determined from the S subbands based on a higher layer parameter. Optionally, the CSI reporting configuration is associated with / includes a subband strength type parameter, where the subband strength type parameter indicates the UE to report the strongest subband or to report the weakest subband (or to report the strongest subband and the weakest subband). Optionally, the UE determines the Srepsubbands for reporting from the S subbands (for each reported resource) based on the subband strength type parameter. For example, when the subband strength type parameter indicates the UE to report the strongest subband, the UE reports (for each reported resource) the CSI associated with the strongest Srepsubbands of the S subbands. For example, when the subband strength type parameter indicates the UE to report the weakest subband, the UE reports (for each reported resource) the CSI associated with the weakest Srepsubbands of the S subbands. For example, when the subband strength type parameter indicates the UE to report the strongest subband and the weakest subband, the UE reports the CSI associated with the strongest Srepsubbands and the weakest Srepsubbands of the S subbands.

[0278] ● Optionally, the Srepsubbands are determined from the S subbands based on the resource type (for example, the resource type of K resources, or the resource type of the N resources, or reported resources). Optionally, the weakest Srepsubbands or the strongest Srepsubbands (or the weakest Srepsubbands and the strongest Srepsubbands) of the reported S subbands are determined based on the resource type. The resource types include SRS-RSRP resource and CLI-RSSI resource. Optionally, when the resources are SRS-RSRP resources, the UE reports (for each reported resource) the strongest Srepsubbands of the S subbands. Optionally, when the resources are CLI-RSSI resources, the UE reports (for each reported resource) the weakest Srepsubbands of the S subbands. When the resources include SRS-RSRP resources and CLI-RSSI resources, the UE reports (for each reported resource) the strongest Srepsubbands of the S subbands and the weakest Srepsubbands of the S subbands.

[0279] ● Optionally, the strength type of the reported subband is determined based on the strength type of the reported resource. For example, if the strength type of the reported resource is the strongest resource (e.g., the N strongest resources), the UE reports (for each reported resource) the CSI associated with the strongest Srepsubbands. For example, if the strength type of the reported resource is the weakest resource (e.g., the N weakest resources), the UE reports (for each reported resource) the CSI associated with the weakest Srepsubbands. For example, if the strength type of the reported resource is the weakest resource and the strongest resource (e.g., N weakest resources and N strongest resources), the UE reports (for each reported resource) the CSI associated with the weakest Srepsubbands and strongest Srepsubbands.

[0280] The definition of the weakest resource / strongest resource, or the definition of the weakest subband / strongest subband or the definition of resource strength / subband strength in the case of subband-related reporting operations are discussed below. Optionally, the strength of a resource may be the size of the L1 quantity associated with a resource. Optionally, the strength of a subband may be the size of the L1 quantity on the subband associated with a resource.

[0281] ● Optionally, the strength of the resource for the CLI measurement is based on the average of L1 quantities (or the average of measurement quantities or measured L1 quantities) associated with CLI on each of the S subbands for the resource. Optionally, the strength of the resource for the CLI measurement is determined based on (the L1 quantity associated with) the subband with the highest / lowest L1 quantity (or the measurement quantity) associated with CLI of the S subbands for the resource. Optionally, the strength of the resource for the CLI measurement is based on (the L1 quantity or average value of L1 quantities associated with) the Srepsubbands with the highest / lowest L1 quantity (or the measurement quantity, or the measured L1 quantity) associated with CLI of the S subbands for the resource.

[0282] ● Optionally, the strongest resource may be the resource with the highest (value of) L1 quantity for the associated subband. Optionally, the weakest resource may be the resource with the lowest (value of) L1 quantity for the associated subband. In order to determine the strength of the resource associated with the subband (or in order to determine the strongest resource / weakest resource), refer above for the determination method for the subband associated with a resource (or the L1 quantity of the subband associated with a resource).

[0283] ● Optionally, the strongest subband associated with a resource may be the subband with the highest (value of) L1 quantity of the S subbands or the Srepsubbands associated with the resource. Optionally, the weakest subband associated with a resource may be the subband with the lowest (value of) L1 quantity of the S subbands or the Srepsubbands associated with the resource. Optionally, the L1 quantity may be the L1 quantity obtained by measurement (on the corresponding subband).

[0284] The L1 quantity that the CSI associated with the N resources may include is discussed above, and which content the CSI associated with the N resources may also include is discussed below. Optionally, the CSI associated with the N resources includes / is associated with / indicates Srepfirst indicators for each of the N resources. Optionally, the Srepfirst indicators are mapped one-to-one with / correspond one-to-one to the Srepsubbands. Optionally, when the UE is configured / indicated to report the CSI associated with the Srepsubbands, the UE reports the Srepfirst indicators for each of the N resources. Optionally, the first indicator may indicate one of the S subbands. For example, the value of the first indicator j (j 0) corresponds to / is associated with / indicates the (j+1)-th subband. Optionally, the order of one or more subbands may be ordered based on ascending / descending order of frequency domain positions. Optionally, the order of the one or more subbands may be determined based on the order (e.g., ascending / descending order) of bits in information indicating the one or more subbands. Optionally, the order of the one or more subbands may be indexed based on ascending / descending order of the frequency domain positions. For example, the subband with the lowest frequency domain position is subband #0. Optionally, the order of the one or more subbands may be determined based on the order (e.g., ascending / descending order) of bits in the information indicating the one or more subbands. For example, the subband corresponding to the first bit is subband #0.

[0285] Optionally, in a report instance (or in a CSI report), the UE may report the maximum / minimum (measured) L1 quantity and / or differential L1 quantity. Optionally, the differential L1 quantity is determined / computed based on the maximum / minimum (measured) L1 quantity. Optionally, the UE may report a second indicator. Optionally, the UE may report a second indicator for each of the N resources (or for all of the N resources). Optionally, the second indicator is used for differential L1 quantity reporting. Optionally, the second indicator may indicate the subband for determining the differential L1 quantity. For example, the differential L1 quantity is determined based on the L1 quantity on the subband indicated by the second indicator. Optionally, when the UE reports the CSI for each of the S subbands (of each of the N resources), the UE may (also) report (in the report instance) a second indicator. Optionally, the second indicator may indicate the subband associated with the maximum / minimum (measured) L1 quantity. Optionally, the second indicator may indicates a subband which is associated with the maximum / minimum (measured) L1 quantity (of a predefined resource within the N resources). Optionally, a predefined resource of the N resources may be the first resource (or the last resource) of the reported N resources. Optionally, a predefined resource of the N resources may be the resource corresponding to the first resource indicator (or the last resource indicator) of the reported N resource indicators corresponding to the N resources. Optionally, the value (j2) of the second indicator indicates / represents / corresponds to the (j2+1)-th subband of the reported S subbands. Optionally, j2 0. Here, the order of subbands is determined as described above. Optionally, the size of the CSI field associated with / corresponding to the second indicator is determined based on S. For example, the size of the CSI field corresponding to / associated with the second indicator is or .

[0286] Optionally, refer Table 1 below for the mapping order of CSI fields in a CSI report. Optionally, the UE may determine the CSI based on Table 1. Optionally, the CSI may be determined based on Table 1. Optionally, the CSI includes resource indicators associated with the N resources: resource indicator #1, resource indicator #2, ..., resource indicator #N. Optionally, indexes associated with the resource indicators are determined based on the order of the resource indicators in the Table. Optionally, the indexes associated with the resource indicator are determined based on the order in the CSI. Optionally, the CSI report also includes N L1 quantities (corresponding to the N resources): L1-CLI-RSSI #1 or L1-SRS-RSRP #1, L1-CLI-RSSI #2 or L1-SRS-RSRP #2, ..., L1-CLI-RSSI #N or L1-SRS-RSRP #N. Optionally, resource indicator #n corresponds to L1-CLI-RSSI #n or L1-SRS-RSRP #n. Optionally, L1-CLI-RSSI #n or L1-SRS-RSRP #n includes: S subband L1-CLI-RSSI or S subband L1-SRS-RSRP. Optionally, S subband L1-CLI-RSSI or S subband L1-SRS-RSRP may respectively occupy a CSI field or share the same CSI field. Optionally, the order of the S subband L1-CLI-RSSI or the S subband L1-SRS-RSRP may be based on the order (e.g., ascending or descending order) of subband indexes. Optionally, the CSI report further includes the second indicator. Optionally, the value j2 of the second indicator indicates that the (j2+1)-th L1-CLI-RSSI of the S subband L1-CLI-RSSI in L1-CLI-RSSI #1 is the maximum (or minimum) measured L1-CLI-RSSI. In the CSI report, the remaining L1-CLI-RSSI are differential L1-CLI-RSSI. Optionally, these differential L1-CLI-RSSI are determined based on the L1-CLI-RSSI of the (j2+1)-th subband in L1-CLI-RSSI #1. Optionally, the value j2 of the second indicator indicates that the (j2+1)-th L1-SRS-RSRP of the S subband L1-SRS-RSRP in L1-SRS-RSRP #1 is the maximum (or minimum) measured L1-SRS-RSRP. In th CSI report, the remaining L1-SRS-RSRP are differential L1-SRS-RSRP. Optionally, these differential L1-SRS-RSRP are determined based on the L1-SRS-RSRP of the (j2+1)-th subband in L1-SRS-RSRP #1.

[0287]

[0288] Table 1. Mapping order of CSI fields in a CSI reporting

[0289] Optionally, refer Table 2 below for the mapping order of CSI fields in a CSI report. Optionally, the UE may determine the CSI based on Table 2. Optionally, the CSI may be determined based on Table 2. Optionally, the CSI includes resource indicators associated with the N resources: resource indicator #1, resource indicator #2, ..., resource indicator #N. Optionally, indexes associated with the resource indicators are determined based on the order of the resource indicators in the Table. Optionally, the indexes associated with the resource indicators are determined based on the order in the CSI.

[0290] Optionally, the CSI report also includes N L1 quantities (corresponding to the N resources): L1-CLI-RSSI #1 or L1-SRS-RSRP #1, L1-CLI-RSSI #2 or L1-SRS-RSRP #2, ..., L1-CLI-RSSI #N or L1-SRS-RSRP #N. Optionally, L1-CLI-RSSI #n or L1-SRS-RSRP #n corresponds to resource indicator #n. Optionally, L1-CLI-RSSI #n or L1-SRS-RSRP #n includes: Srepsubband L1-CLI-RSSI or Srepsubband L1-SRS-RSRP. Optionally, the Srepsubband L1-CLI-RSSI or the Srepsubband L1-SRS-RSRP may respectively occupy a CSI field or share the same CSI field. Optionally, the order of Srepsubband L1-CLI-RSSI or Srepsubband L1-SRS-RSRP may be based on the order (e.g., ascending or descending order) of subband indexes.

[0291] Optionally, the CSI report also includes the first indicators corresponding to / associated with N resources: first indicator #1, first indicator #2, ..., first indicator #N. Optionally, resource indicator #n corresponds to first indicator #n. Optionally, first indicator #n includes Srepfirst indicators. Optionally, the Srepfirst indicators are associated one-to-one with / correspond one-to-one to the Srepsubbands. Optionally, the Srepfirst indicators may respectively occupy a CSI field or share the same CSI field. Optionally, the Srepfirst indicators may be determined based on the order (e.g., ascending or descending order) of the subband indexes. Optionally, the first indicator indicates the subband associated with the corresponding L1 quantity. Optionally, the Srepfirst indicators in first indicator #n are mapped one-to-one with / correspond one-to-one to the Srepsubband L1 quantities in L1-CLI-RSSI #n or the Srepsubband L1 quantities in L1-SRS-RSRP #n. For example, the m-th first indicator of the Srepfirst indicators indicates the subband corresponding to the m-th subband L1 quantity of the Srepsubband L1 quantities.

[0292] Optionally, the maximum (or minimum) measured L1-CLI-RSSI or L1-SRS-RSRP may be the L1-CLI-RSSI or L1-SRS-RSRP for the predefined subband of the predefined resource. Optionally, the predefined resource may be the resource corresponding to resource indicator #1. Optionally, the predefined subband may be the first subband (or the last subband) of the Srepsubbands. For example, the first subband L1-CLI-RSSI of the S subband L1-CLI-RSSI in L1-CLI-RSSI #1 is the maximum (or minimum) measured L1-CLI-RSSI. In the CSI report, the remaining L1-CLI-RSSI are differential L1-CLI-RSSI. For example, the first subband L1-SRS-RSRP of the S subband L1-SRS-RSRP in L1-SRS-RSRP #1 is the maximum (or minimum) measured L1-SRS-RSRP. In the CSI report, the remaining L1-SRS-RSRP are differential L1-SRS-RSRP.

[0293]

[0294] Table 2. Mapping order of CSI fields in a CSI report

[0295] The above method defines the determination method of the subband associated with the resource for the CLI measurement (and / or the CSI associated with the subband), so that the UE and the base station have the same understanding of the subband associated with the resource for the CLI measurement (and / or the CSI associated with the subband), improving the reliability of the communication system.

[0296] Triggering method of the CSI report for the CLI measurement is discussed below. Optionally, the UE may determine whether to report the CSI report (or whether to trigger the CSI report) based on the indicated TCI state. Optionally, whether the UE reports the CSI report (or whether the CSI report is triggered) may be determined based on the indicated TCI state. Optionally, the UE may determine whether the CSI report is transmitted / triggered based on at least one of the following conditions. For example, when the condition is satisfied, the UE triggers / transmits the CSI report; otherwise, the UE does not trigger / not report (or drops) the CSI report. Optionally, the conditions include at least one of the followings:

[0297] ● Condition #1: the difference between the L1 quantity (e.g., L1-RSRP) of the reference signal resource associated with the indicated TCI state and the L1 quantity (e.g., L1-SRS-RSRP or CLI-RSSI) associated with the K resources is greater than or equal to a first threshold. Optionally, the first threshold is indicated by the base station (for example, indicated by the CSI reporting configuration), or predefined, or determined based on the UE capability. Optionally, the TCI state of each of the K resources is the indicated TCI state. Optionally, the L1-SRS-RSRP associated with the K resources may be / may include the L1-SRS-RSRP of all resources in the K resources, or the L1-SRS-RSRP of at least one resource in the K resources, or the L1-SRS-RSRP with the lowest median value of L1-SRS-RSRP of all resources in the K resources, or the L1-SRS-RSRP with the highest median value of L1-SRS-RSRP of all resources in the K resources, or L1-SRS-RSRP of N resources in the K resources.

[0298] ● Condition #2: the L1 quantity (e.g., L1-RSRP) of the reference signal resource associated with the indicated TCI state is greater than or equal to a second threshold. Optionally, the second threshold is indicated by the base station (for example, indicated by the CSI reporting configuration), or predefined, or determined based on the UE capability;

[0299] ● Condition #3: the L1 quantity of any one of the K resources is greater than or equal to a third threshold, or the L1 quantities of all resources in the K resources are greater than or equal to the third threshold, or the L1 quantities of N resources of the K resources are greater than or equal to the third threshold, or the L1 quantities of Y resources of the K resources are greater than or equal to the third threshold. Optionally, Y is indicated by the base station (for example, indicated by the CSI reporting configuration), or predefined, or determined based on the UE capability. Optionally, the third threshold is indicated by the base station (for example, indicated by the CSI reporting configuration), or predefined, or determined based on the UE capability. Optionally, the TCI state of each of the K resources is the indicated TCI state.

[0300] The reference signal associated with the indicated TCI state is discussed below. Optionally, the reference signal associated with the indicated TCI state may be the reference signal corresponding to the indicated TCI state. Optionally, the reference signal associated with the indicated TCI state may be at least one of the followings (the reference signal associated with the indicated TCI state is determined using the following Method #1 or Method #2):

[0301] ● Method #1. An SSB quasi co-located with the QCL reference signal for the indicated TCI state;

[0302] ● Method #2. A QCL reference signal for the indicated TCI state. Optionally, if a TCI state is associated with / includes / corresponds to two QCL reference signals, the reference signal associated with the indicated TCI state is the corresponding QCL type D reference signal of these two QCL reference signals.

[0303] Optionally, the reference signal resource associated with the indicated TCI state may be determined based on the reference signal for measurement (or the reference signal set for channel measurement, or the reference signal set for interference measurement). Optionally, if the resources in the resource set are SSB resources, the reference signal associated with the indicated TCI state is the SSB quasi-co-located with the QCL reference signal for the indicated TCI state. Optionally, if the resources in the resource set are CSI-RS resources, the reference signal associated with the indicated TCI state is the QCL reference signal associated with the indicated TCI state, where the reference signal is a CSI-RS. Optionally, the indicated TCI state may be the indicated unified TCI state.

[0304] The above method defines the transmitting method / triggering method of the CSI report for the CLI measurement, so that the UE and the base station have the same understanding of the transmitting method / triggering method of the CSI report, improving the reliability of the communication system.

[0305] The method of determining the CSI reference resource associated with / corresponding to the CSI report is discussed below. The method of determining the time domain unit where the CSI reference resource associated with / corresponding to the CSI report is located is discussed below. Optionally, the CSI reference resource is determined based on at least one of the followings:

[0306] ● Resource type (e.g., resource type of the K resources);

[0307] ● Time domain behaviour of the resource. Optionally, the time domain behaviour associated with the K resources include periodic, or semi-persistent, or aperiodic;

[0308] ● K;

[0309] ● The SBFD time domain resource.

[0310] Optionally, the CSI reference resource is in a (valid) time domain unit. Optionally, when the K resources are SRS-RSRP resources, the CSI reference resource is in a (valid) time domain unit. Optionally, the CSI reference resource is determined based on the resource type (e.g., the resource type of the K resources) and / or the SBFD time domain resource. Optionally, when K=1 and the CSI report is periodic CSI report or semi-persistent CSI report, the value of a parameter nCSI_refused for determining the CSI reference resource is a value greater than or equal to and such that the CSI reference resource is a minimum value in a (valid) time domain unit. Optionally, when K>1 and the CSI report is periodic CSI report or semi-persistent CSI report, the value of the parameter nCSI_refused for determining the CSI reference resource is a value greater than or equal to and such that the CSI reference resource is a minimum value in a (valid) time domain unit. Here, represents the subcarrier spacing configuration. Optionally, the (valid) time domain unit refers to at least one of the followings:

[0311] ● The time domain unit including symbols included in the at least one SBFD time domain resource;

[0312] ● The time domain unit with symbols included being symbols included in the SBFD time domain resource;

[0313] ● The time domain unit including at least one first symbol, or the time domain unit with the symbols included being the first symbol, where the first symbol may include / be the symbol included in the SBFD time domain resource, or the downlink symbol configured by the TDD configuration;

[0314] ● The time domain unit including at least one second symbol, or the time domain unit with the symbols included being the second symbol, where the second symbol may include / be the symbol included in the SBFD time domain resource, or the uplink symbol configured by the TDD configuration.

[0315] Optionally, when the resource is an SRS-RSRP resource, the (valid) time domain unit refers to at least one of the followings:

[0316] ● The time domain unit including symbols associated with / included in the at least one SBFD time domain resource;

[0317] ● The time domain unit with symbols included being symbols associated with / included in the SBFD time domain resource;

[0318] ● The time domain unit including at least one second symbol, or the time domain unit with the symbols included being the second symbol, where the second symbol may include / be the symbol associated with / included in the SBFD time domain resource, or the uplink symbol configured by the TDD configuration.

[0319] Optionally, when the resource is a CLI-RSSI resource, the (valid) time domain unit refers to at least one of the followings:

[0320] ● The time domain unit including symbols associated with / included in the at least one SBFD time domain resource;

[0321] ● The time domain unit with symbols included being symbols associated with / included in the SBFD time domain resource;

[0322] ● The time domain unit including at least one second symbol, or the time domain unit with the symbols included being the second symbol, where the second symbol may include / be the symbol associated with / included in the SBFD time domain resource, or the uplink symbol configured by the TDD configuration.

[0323] The above method defines the method of determining the CSI reference resource, so that the UE and the base station have the same understanding of the time domain position where the CSI reference resource is located, improving the reliability of the communication system. In addition, the above method defines the method of determining the CSI reference resource through the resource type, so that the CSI reference resource corresponding to the CSI report associated with different types of resources may be in different time domain units, improving the flexibility of the communication system.

[0324] Methods for determining the priority of the CSI report (e.g., the UE initiated CSI report) are discussed below. The CSI report may be associated with a priority value. If the priority value associated with the first CSI report is lower than the priority value associated with the second CSI report, the first CSI report may be considered to be prioritized over the second CSI report (or the first CSI report may be considered to have a higher priority than the second CSI report). The priority (or priority value) of the CSI report is determined based on at least one of the followings:

[0325] ● The types of the K resources;

[0326] ● The content of the CSI report;

[0327] ● The triggering method of the CSI report;

[0328] ● The serving cell associated with the CSI report;

[0329] ● The CSI reporting configuration.

[0330] Optionally, the priority (or priority value) of the CSI report being determined based on the content of the CSI report refers to the priority (or priority value) of the CSI report being determined based on the L1 quantity reported by the UE. For example, when one CSI report includes (only) the LI quantity associated with CLI and the other CSI report includes (only) the LI quantity not associated with CLI, the priorities (or priority values) of the two CSI reports are different. When the types of LI quantities associated with CLI are different, the priorities (or priority values) of the associated CSI reports are different. For example, the priority (or priority value) of the CSI report associated with L1-SRS-RSRP is different from the priority (or priority value) of the CSI report associated with L1-CLI-RSSI.

[0331] Optionally, the priority (or priority value) of the CSI report being determined based on the triggering method of the CSI report refers to the priority (or priority value) of the CSI report being determined based on whether the CSI report is triggered by DCI. For example, the priorities (or priority values) of the CSI report triggered by DCI and the CSI report not triggered by DCI are different.

[0332] Optionally, the priority (or priority value) of the CSI report being determined based on the cell associated with the CSI report refers to the priority (or priority value) of the CSI report being determined based on the serving cell where the CSI report is located. For example, when CSI reports are in different serving cells, the priorities (or priority values) of the CSI reports are different.

[0333] Optionally, the priority (or priority value) of the CSI report being determined based on the CSI reporting configuration refers to the priority (or priority value) of the CSI report being determined based on the cell associated with the CSI reporting configuration / where the CSI reporting configuration is located, and / or being determined based on the ID of the CSI reporting configuration. For example, when the CSI reporting configurations are in different serving cells, the priorities (or priority values) of the CSI reports are different. For example, if the IDs of the CSI reporting configurations associated with the CSI reports are different, the priorities (or priority values) of the CSI reports are different.

[0334] The method of determining the priority value of the CSI report is discussed below. Optionally, the priority (e.g., priority value, ) associated with / corresponding to the CSI report is determined / computed by the following Equation 1:

[0335]

[0336] where the meaning and / or value of each parameter is as follows:

[0337] ● The value of is as follows:

[0338] ■ Optionally, for aperiodic CSI report, .

[0339] ■ Optionally, for condition-triggered or event-triggered CSI report, .

[0340] ■ Optionally, for semi-persistent CSI report carried by PUSCH, .

[0341] ■ Optionally, for semi-persistent CSI report carried by PUCCH, .

[0342] ■ Optionally, for periodic CSI report (carried by PUCCH), .

[0343] ● The value of is as follows:

[0344] ■ for CSI reports carrying L1-RSRP or L1-SINR or L1-SRS-RSRP or L1-CLI-RSSI, ; for CSI reports not carrying L1-RSRP or L1-SINR or L1-SRS-RSRP or L1-CLI-RSSI, .Since the CSI report of the L1 quantity associated with CLI has an important reference value for base station scheduling, the above method makes it possible that carrying the CSI report of the L1 quantity associated with CLI (for example, compared with the CSI report carrying the L1 quantity except for L1-RSRP, L1-SINR, L1-SRS-RSRP, L1-CLI-RSSI) has a higher priority (lower priority value), improving the reliability of the communication system.

[0345] ●cis the serving cell index.

[0346] ■ Optionally, the serving cell refers to the serving cell where the CSI report is located.

[0347] ● is the value of the higher layer parameter, where the higher layer parameter is used for representing the maximum number of serving cells, for example,maxNrofServingCells. Optionally, the higher layer parameter is associated with the UE capability.

[0348] ●sis thereportConfigID, for example, the reporting configuration ID parameter corresponding to the CSI report.

[0349] ● is the value of the higher layer parameter, where the higher layer parameter is used for representing the maximum number of the reporting configurations, e.g.,maxNrofCSI-ReportConfigurations. Optionally, the higher layer parameter is associated with the UE capability.

[0350] Optionally, two CSI reports are said to collide if the time resources for the physical channels scheduled to carry the CSI reports overlap in at least one OFDM symbol and are transmitted on the same carrier.

[0351] Optionally, if of two CSI reports are different, the CSI report with the higher value of these two CSI reports is not transmitted by the UE. Optionally, if of two CSI reports are the same, these two CSI reports may be multiplexed or one of these two CSI reports is dropped based on the priority values.

[0352] Optionally, the CSI report for the CLI measurement (or the CSI report for reporting the L1 quantity associated with CLI) has a higher / lower priority over the CSI report triggered / configured by the base station. Optionally, in case of the CSI report collision, or in case of CSI multiplexing or CSI dropping, the CSI report for the CLI measurement (or the CSI report for reporting the L1 quantity associated with CLI) has a higher / lower priority over the CSI report triggered / configured by the base station. Optionally, for the case of the CSI report collision, or for the case of the CSI multiplexing or the CSI dropping, the CSI report for the CLI measurement (or the CSI report for reporting the L1 quantity associated with CLI) has s higher / lower priority over the CSI report triggered / configured by the base station, regardless of of the CSI report. Optionally, the CSI report triggered / configured by the base station may be / may include the CSI report configured by the CSI reporting configuration for Layer 1 / Layer 2 triggered mobility (LTM) (e.g., the higher layer parameter LTM-CSI-ReportConfig). Optionally, the CSI report triggered / configured by the base station may be / may include the CSI report configured by the higher layer parameter CSI-ReportConfig. Optionally, the CSI report triggered / configured by the base station includes the CSI report configured by the higher layer parameter CSI-ReportConfig and / or the higher layer parameter LTM-CSI-ReportConfig. This method defines the handling method by the UE of the CSI report collision, so that the UE and the base station have the same understanding of whether these CSI reports are transmitted, improving the reliability of the communication system.

[0353] 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 cell of the BWP may be the cell where the CSI reporting configuration is located. Optionally, the cell of the BWP may be the cell indicated by the parameter included in the CSI reporting configuration. 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.

[0354] In some cases, the UE may receive / be configured with the CSI reporting configuration (e.g., CSI-ReportConfig). Optionally, the CSI reporting configuration may be associated with / corresponding to a CSI resource setting. Optionally, a CSI resource setting (e.g., CSI-ResourceConfig) may be associated with / correspond to one or more resource sets. Optionally, the CSI resource setting may indicate one or more resource sets. Optionally, the CSI reporting configuration information may indicate / be configured / be associated with resource set(s). Optionally, a resource set may include one or more resources. Optionally, the resource set may include at least one of CSI-RS resource, SSB resource and CSI interference measurement (CSI-IM) resource. Optionally, the CSI-RS resource may be a non-zero power (NZP) CSI-RS. Optionally, the CSI reporting configuration information may indicate / be configured / be associated with at least one of the followings:

[0355] ● A resource set for channel measurement. Optionally, the resource set includes K resources. Optionally, K 1, or K>1, or K≥2. Optionally, the resource set may be configured by a higher layer parameter NZP-CSI-RS-ResourceSet, where the parameter includes configuration information of one or more resources. The resource may be the CSI-RS resource and / or the SSB resource. Optionally, the numbers of ports of each CSI-RS resource in the resource set are the same. Optionally, the number of ports of each CSI-RS resource in the resource set is less than or equal to 32.

[0356] ● A resource set for interference measurement. The resource set includes K_inter resources. Optionally, K_inter≥=1. Optionally, the resource may be the CSI-RS resource and / or the CSI-IM resource. Optionally, the resources in the resource set for channel measurement may be associated with the resources in the resource set for interference measurement. Optionally, the UE determines the CSI based on the resources for channel measurement and associated resources for interference measurement.

[0357] ■ When the resources included in the resource set for interference measurement are CSI-IM resources, K_inter = K. Optionally, the K resources for channel measurement correspond one-to-one to / are associated one-to-one with the K resources for interference measurement. Optionally, the k-th resource in the resource set for channel measurement is associated with the k-th resource in the resource set for interference measurement. Optionally, k 1 and / or k<K. For example, if interference measurement is performed on CSI-IM, each resource (e.g., CSI-RS resource) for channel measurement is associated with a resource (e.g., CSI-IM resource) for interference measurement. For example, if interference measurement is performed on CSI-IM, each resource (e.g., CSI-RS resource) for channel measurement is resource-wise associated with a resource (e.g., CSI-IM resource) for interference measurement by the ordering of the CSI-RS resources and CSI-IM resources in the corresponding resource sets. For example, the resource set for channel measurement includes {CSI-RS#1, CSI-RS#2, CSI-RS#3, CSI-RS #4}; the resource set for interference measurement includes {CSI-IM#1, CSI-IM#2, CSI-IM#3, CSI-IM#4}, CSI-RS#1 is associated with CSI-IM#1; CSI-RS#2 is associated with CSI-IM#2; CSI-RS#3 is associated with CSI-IM#3; CSI-RS#4 is associated with CSI-IM#4.

[0358] ■ When the resources included in the resource set for interference measurement are CSI-RS resources, K_inter = 1. Optionally, the K resources for channel measurement are associated with one resource for interference measurement. For example, if interference measurement is performed on CSI-RS, each resource (e.g., CSI-RS resource) for channel measurement is associated with the resource (e.g., CSI-RS resource) for interference measurement. For example, the resource set for channel measurement includes {CSI-RS#1, CSI-RS#2, CSI-RS#3, CSI-RS #4}; the resource set for interference measurement includes {CSI-RS#5}, CSI-RS#1 is associated with CSI-RS#5; CSI-RS#2 is associated with CSI-RS#5; CSI-RS#3 is associated with CSI-RS#5; CSI-RS#4 is associated with CSI-RS#5.

[0359] Optionally, the K resources in the resource set for channel measurement may be configured with a common rank restriction. Optionally, the K resources in the resource set for channel measurement may be configured with a rank restriction. Optionally, the rank restriction is applicable to each of the K resources.

[0360] Optionally, the K resources in the resource set for channel measurement may be configured with rank restrictions respectively. Optionally, each of the K resources in the resource set may be configured with a respective / associated / corresponding rank restriction. Optionally, K rank restrictions may be configured. Optionally, the K rank restrictions may also be called resource-specific rank restrictions. Optionally, the K rank restrictions may be configured by a higher layer parameter. Optionally, the K rank restrictions may be configured by the CSI reporting configuration. Optionally, the k-th resource of the K resources corresponds to / is associated with the k-th rank restriction of the K rank restrictions, where 1 k≤K.

[0361] Optionally, the CSI of a CSI-RS resource (or the CSI associated with a CSI-RS resource) is determined based on the rank restriction corresponding to / associated with the CSI-RS resource. Optionally, the rank restriction corresponding to / associated with the CSI-RS resource is applicable to the determination of the CSI of the CSI-RS resource (for example, the determination of RI and / or PMI). Optionally, the rank restriction may be the RI restriction. Optionally, the rank restriction refers to the restriction on RI. Optionally, the rank restriction refers to the value restriction of RI. Optionally, the rank restriction refers to the restriction on RI and / or PMI. Optionally, the rank restriction refers to the restriction on RI and / or PMI corresponding to RI. Optionally, the rank restriction may be used for indicating which numbers of layers are not allowed or which numbers of layers are allowed. Optionally, the rank restriction may be used for indicating which values of RI are not allowed or which values of RI are allowed. In the disclosure, the allowed rank may be understood as the allowed number of layers, or the allowed value of RI. Here, the value of an RI being allowed refers to the value of an RI being allowed to be reported. The value of an RI being not allowed refers to the value of an RI being not allowed to be reported. In the disclosure, the term "allowed rank" may be used interchangeably with the term "allowed number of layers" or "allowed value of RI". Optionally, the rank restriction may be determined by a parameter for indicating the rank restriction (for example, typeI-SinglePanel-ri-Restriction, or typeII-RI-Restriction, or ri-Restriction). Optionally, a parameter for indicating the rank restriction includes / forms / indicates a bitmap. The numb of bits may be a bit sequence. Optionally, the bitmap for rank restriction indication may be rR, ..., r1, r0. Optionally, each bit indicates / corresponds to a rank. Optionally, each bit indicates / corresponds to a value of RI. Optionally, r0may be a Least Significant Bit (LSB), and rRmay be a Most Significant Bit (MSB). Here, the value of R may be one of 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12. One of rR, ..., r1, r0is ri, where i {0,1, ...,R}. When riis 0, PMI and / or RI reporting are not allowed to correspond to any precoder associated with v=i+1 layers. When riis 1, PMI and / or RI reporting are allowed to correspond to any precoder associated with v=i+1 layers. Here, v represents the value of rank, or the number of layers. Optionally, when riis 0, the rank corresponding to riis not allowed. When riis 1, the rank corresponding to riis allowed.

[0362] Optionally, for the CSI reporting configuration, the UE determines and / or reports the CSI. Optionally, for the CSI reporting configuration, the UE determines and / or reports the associated / corresponding CSI. Optionally, the UE determines and / or reports the CSI associated with / corresponding to the CSI reporting configuration. Optionally, the UE determines and / or reports the CSI, where the CSI is associated with the resource(s) in the resource set(s) associated with / corresponding to the CSI reporting configuration. Optionally, the UE determines and / or reports the CSI associated with M resources. Optionally, the M resources are in the resource set for channel measurement. Optionally, the M resources are the M resources in the resource set for channel measurement. Optionally, the M resources may refer to the reported resources. Optionally, the M may refer to the number of the reported resources. Optionally, the UE determines and / or reports the CSI associated with each of the M resources. Optionally, the CSI is in a report instance. Optionally, the CSI associated with the M resources are (reported) in one instance.

[0363] In the disclosure, "CSI associated with resource" may be used interchangeably with the term "CSI of resource" or "CSI associated with CRI" or "CSI of CRI". Optionally, the resource may be referred by the CRI corresponding to the resource. For example, the CSI associated with one of the (reported) M resources may be called the CSI associated with one of the (reported) M CRIs. Optionally, the CSI associated with a resource may be the CSI obtained / determined based on the resource. Optionally, the CSI associated with a resource may be the CSI obtained / determined based on the measurement of the resource. Optionally, the CSI associated with a resource may be the CSI determined based on CRI corresponding to the resource.

[0364] The characteristics of M are discussed below. Optionally, M 1, or M>0; or M≥2. Optionally, M K. Optionally, the value range of M may be from 1 to min(4, K). Optionally, the maximum value of M is determined based on the UE capability. For example, the maximum value of M is indicated by the UE capability. Optionally, the value of M is configured by RRC signaling. For example, the value of M is configured by the CSI reporting configuration. Optionally, the value of M may be indicated by MAC-CE and / or DCI.

[0365] The characteristics of the M resources are discussed below. Optionally, the M resources may be from the K resources. Optionally, the M resources may be selected from the K resources. Optionally, the M resources may be M different resources. For example, the M resources may be M different resources of the K resources. For example, M CRIs may be M different CRIs. For example, the CRIs corresponding to the M resources may be M different CRIs.

[0366] ● Optionally, MR(MR 0) resources may be indicated / configured (by the base station). Optionally, the MRresources may be configured by at least one of RRC, MAC-CE and DCI. For example, the MRresources may be configured by RRC and further activated / indicated by MAC-CE or DCI. For example, the MRresources may be indicated / configured by the CSI reporting configuration. Optionally, the MRresources are from the K resources. Optionally, the MRresources may be indicated by MRindexes. Optionally, the value of one of the MRindexes may be m. Optionally, m 0. Optionally, m indicates / corresponds to the (m+1)-th resource in the resource set. Optionally, the MRresources may be indicated for aperiodic CSI reporting. Optionally, MR 0. Optionally, the value of MRmay be one of 0, 1, 2, 3 and 4.

[0367] ● When the MRresources are configured / indicated, the UE (always) reports the CSI associated with the MRresources. When the MRresources are configured / indicated, the M resources include the MRresources and M-MRresources. Optionally, the UE determines and / or reports the CSI associated with the MRresources and / or the CSI associated with the M-MRresources. Optionally, the UE determines and / or reports the CSI associated with each of the MRresources and / or the CSI associated with each of the M-MRresources. Optionally, the M-MRresources are from the K-MRresources. Optionally, the M-MRresources are selected from the K-MRresources. Optionally, the K-MRresources refer to the K-MRresources other than the configured / indicated MRresources in the resource set.

[0368] ● Optionally, when MR=0, it may be considered that the UE does not always report a specific resource of the K resources. Optionally, when the MRresources are not configured / indicated, it may be considered that MR=0. Optionally, when the MRresources are not configured, the UE determines and / or reports the CSI associated with the M resources. Optionally, the M resources are in the resource set for channel measurement.

[0369] Optionally, the CSI includes at least one of CRI, RI, PMI, CQI and LI. Optionally, the CSI includes CRI and / or the CSI associated with CRI. Optionally, the CSI associated with one / each of the M resources includes at least one of CRI, RI, PMI, CQI and LI. Optionally, the CSI associated with one / each of the M resources includes CRI and / or the CSI associated with / corresponding to CRI. Optionally, the CSI associated with / corresponding to CRI includes at least one of RI, PMI, CQI and LI.

[0370] Optionally, the CSI associated with the resource may include at least RI. In the disclosure, "CSI includes at least RI" may be used interchangeably with "report quantity parameter corresponding to (or configured by) CSI reporting configuration may include at least 'RI'". Optionally, the report quantity parameter (for example, reportQuantity) corresponding to (or configured by) the CSI reporting configuration include at least 'RI'. For example, the report quantity parameter (for example, reportQuantity) corresponding to (or included in, or configured by, or indicated by) the CSI reporting configuration may be set to at least one of "cri-RI-PMI-CQI", "cri-RI-LI-PMI-CQI", "cri-RI-i1", "cri-RI-i1-CQI", "cri-RI-CQI". For example, the report quantity parameter (for example, reportQuantity) included in the CSI reporting configuration may be set to at least one of "cri-RI-PMI-CQI", "cri-RI-LI-PMI-CQI", "cri-RI-i1-CQI", "cri-RI-CQI".

[0371] Associated characteristics of CRI in the CSI are described below.

[0372] Optionally, there is no CRI in the CSI associated with each of the MRresources. Optionally, CRI is not included in the CSI associated with each of the MRresources. Optionally, in the CSI associated with each of the MRresources, the size of the CRI field is 0. Optionally, the CSI associated with each of the MRresources reported by the UE does not include the CRI associated with each of the MRresources.

[0373] Optionally, there is CRI in the CSI associated with each of the M-MRresources. Optionally, CRI is included in the CSI associated with each of the M-MRresources. Optionally, the CRI may be indicated by the CRI field. Optionally, the size of the CRI field associated with the M-MRresources is determined based on K-MR. Optionally, the size of the CRI field associated with each of the M-MRresources is determined based on K-MR. For example, the size of the CRI field is equal to . Optionally, the value k (k 0) of CRI may be for indicating one of the K-MRresources. Optionally, the value k of CRI may correspond to one of the K-MRresources. For example, the value k of CRI corresponds to / is mapped to the (k+1)-th resource of the K-MRresources. For example, when K-MR>1, the value k of CRI corresponds to / is mapped to the (k+1)-th resource of the K-MRresources. For example, the value k of CRI (when K-MR>1) corresponds to the (k+1)-th resource determined based on the ascending / descending order of IDs of CSI-RS resources of the K-MRresources. For example, (when K-MR>1) the value k of CRI corresponds to the (k+1)-th resource determined based on the configuration information of the resource set of the K-MRresources. For example, (when K-MR>1) the value k of CRI corresponds to the (k+1)-th entry in NZP-CSI-RS-ResourceSet corresponding to the K-MRresources. The above method may enable the base station to determine the resources on which the CSI is computed based, so that the base station may use the transmission parameter associated with the corresponding resource(s) to schedule accordingly, improving the accuracy of the communication system.

[0374] Associated characteristics of RI in the CSI are described below.

[0375] Optionally, RI may be included in the CSI. Optionally, there is RI in the CSI associated with each of the M resources. Optionally, RI may be indicated by a RI field. Optionally, the size of the RI field may be determined based on the allowed rank. Optionally, the size of the RI field is determined based on the number (e.g., nRI) of allowed RI values. Optionally, the size of the RI field is determined according to the number of allowed RI values associated with the corresponding CSI-RS resource. Optionally, when each of the K resources is configured with the rank restriction, the size of the RI field is determined according to the number of allowed RI values associated with the corresponding CSI-RS resource. Optionally, the size of the RI field may be determined based on , where refers to the number of the allowed RI values. Optionally, the values of the rank indicator field are mapped to allowed rank indicator values with increasing / decreasing order, where '0' is mapped to the smallest allowed rank indicator value. Optionally, refer above for the determination method of the allowed rank. For example, rank restriction parameter associated with / corresponding to a resource indicates that the allowed rank values are: 1, 3, 4, where RI = 0 represents rank 1, RI = 1 represents rank 3, and RI = 2 represents rank 4.

[0376] The CSI reported by the UE may include one part or two parts. The CSI including only one part may be called a single part CSI. Two parts included in the CSI may be called CSI Part 1 and CSI Part 2 respectively. Optionally, if the CSI includes only one part, the number of information bits of the CSI is fixed. Optionally, if the CSI includes two parts, the number of information bits of the CSI Part 1 is fixed. Optionally, the CSI Part 1 has a fixed payload size and / or is used to identify the number of information bits in CSI Part 2.

[0377] Since the resources (for example, the M resources or the M-MRresources) corresponding to the CSI in the CSI report may be selected / determined by the UE, the base station may not know the CSI of which resources the CSI contained in the UE's report corresponds to before demodulating the channel associated with the uplink channel (for example, PUSCH or PUCCH). In some cases (for example, under the condition that each of the K resources is configured with RI restriction), different resources correspond to different payload / information bits, which will affect some behaviors of the UE, for example, the determination of PUCCH resource, the determination of the number of corresponding PRBs (for example, the determination of the number of PRBs of PUCCH resource), or the determination of the number of CSI reports in CSI Part 2. A feasible method is the assumption that both the base station and the UE use M resources of the K resources, so that the UE behavior has nothing to do with the resources corresponding to the CSI reported by the UE, thus avoiding the base station from demodulating the CSI by using the CSI size corresponding to the wrong CSI resource, improving the reliability of the communication system. In addition, the base station and the UE need to have the same assumption about the rank associated with one or each of the M resources so that the UE and the base station may perform related operations based on the same size of the CSI Part 2, improving the reliability of the communication system. In this method, the description for the M resources may also be used to describe the M-MRresources. In this method, the description for the K resources may also be used to describe the K-MRresources. Refer above for the description associated with MR.

[0378] Optionally, the UE assumes / determines that M CRIs are in the CSI report. When an eighth condition is satisfied, based on the assumption that M CRIs are in the CSI report, the UE determines the number of PRBs corresponding to the PUCCH resource and / or the PUSCH resource, or determines the number of CSI Part 2 CSI reports. When the eighth condition is satisfied, the UE determines the number of the PRBs corresponding to the PUCCH resource and / or the PUSCH resource, or determines the number of the CSI Part 2 CSI reports, assuming that M CRIs are in the CSI report. Optionally, the M CRIs may indicate different values, respectively. Optionally, the M CRIs may all indicate the same value. Optionally, the M CRIs may indicate 0, 1, 2, ..., m-1, respectively. Optionally, the m-th CRI of the M CRIs indicates m-1. Optionally, 1 m≤M. Optionally, the M CRIs all indicate 0. Optionally, the values of the M CRIs are 0. Optionally, the M CRIs all indicate M-1. Optionally, the values of the M CRIs are M-1. Optionally, the M CRIs may be associated with / correspond to specific M resources. Optionally, the M CRIs may be associated with / correspond to a specific resource. Optionally, the RI associated with / corresponding to each CRI indicates 1 (rank 1). Optionally, the RI associated with / corresponding to each CRI indicates rank X, where X may be one of 1, 2, 3, 4, 5, 6, 7 and 8. Optionally, the RI associated with / corresponding to each CRI indicates the lowest allowed rank associated with the corresponding resource.

[0379] Optionally, the CSI associated with each of the M CRIs indicates a rank X. Optionally, X is indicated by the base station. For example, X may be indicated by at least one of RRC, MAC-CE and DCI. For example, X may be indicated by the CSI reporting configuration. Optionally, the CSI associated with each of the M CRIs indicates a rank Xm. Optionally, 1 m≤M. Optionally, the rank Xmcorresponds to the m-th CRI of the M CRIs. For example, Xmmay be indicated by at least one of RRC, MAC-CE and DCI. For example, Xmmay be indicated by the CSI reporting configuration. Optionally, Xmmay be one of 1, 2, 3, 4, 5, 6, 7 and 8.

[0380] Optionally, the rank (e.g., X) indicated by the CSI associated with one / each of the M CRIs is determined based on the RI restriction. Optionally, the rank (e.g., Xm) indicated by the CSI associated with the m-th CRI of the M CRIs is determined based on the RI restriction. Optionally, 1 m≤M. Optionally, the RI restriction may be the configured RI restriction. Optionally, the rank indicated by the CSI is the lowest allowed rank determined based on the RI restriction. Optionally, the rank indicated by the CSI is the highest allowed rank determined based on the RI restriction. Optionally, whether the rank indicated by the CSI is the lowest allowed rank or the highest allowed rank determined based on the RI restriction may be indicated by the base station. For example, a parameter is indicated by the base station. When the parameter indicates a first state, the rank indicated by the CSI is the lowest allowed rank determined based on the RI restriction. When the parameter indicates a second state, the rank indicated by the CSI is the highest allowed rank determined based on the RI restriction. Optionally, the rank indicated by the CSI is one of the allowed ranks indicated by the RI restriction. Optionally, one of the allowed ranks indicated by the RI restriction may be indicated by the base station. For example, one of the allowed ranks indicated by the RI restriction may be determined by at least one of RRC, MAC-CE and DCI. For example, a parameter may be indicated with the value of the RI associated with the rank. For example, a parameter is indicated by the base station, where the value of the parameter is equal to the value of the RI associated with the rank. Refer above for the mapping method of the rank and the value of RI. For example, a parameter whose value (m) is mapped to the m-th allowed rank may be indicated. Optionally, when m = 0, the parameter indicates the lowest allowed rank. This method may make the UE determine the size of CSI Part 2 based on the value of the reported rank the UE is allowed, so that the size of the assumed CSI Part 2 is close to the size of the CSI actually transmitted, improving the accuracy of determining the uplink resource.

[0381] ● Optionally, if the K RI restrictions are configured, the rank indicated by the CSI is the lowest rank of the allowed ranks associated with / indicated by the K RI restrictions. Optionally, if the K RI restrictions are configured, the rank indicated by the CSI is the highest rank of the allowed ranks associated with / indicated by the K RI restrictions.

[0382] ● Optionally, if the K RI restrictions are configured, the rank indicated by the CSI is the lowest M ranks of the allowed ranks associated with / indicated by the K RI restrictions. Optionally, if the K RI restrictions are configured, the rank indicated by the CSI is the highest M ranks of the allowed ranks associated with / indicated by the k RI restrictions. Optionally, Xmis equal to / based on the m-th rank of the M ranks.

[0383] ● Optionally, if the K RI restrictions are configured, the rank indicated by the CSI is the lowest rank of the allowed ranks (respectively) associated with / indicated by the M RI restrictions of the K RI restrictions. Optionally, if the K RI restrictions are configured, the rank indicated by the CSI is the highest M ranks of the allowed ranks (respectively) associated with / indicated by the M RI restrictions of the K RI restrictions. Optionally, Xmis equal to / based on the m-th rank of the M ranks. Optionally, the M RI restrictions of the K RI restrictions refer to the M RI restrictions with the lowest allowed rank of the K RI restrictions. Optionally, the M RI restrictions of the K RI restrictions refer to the M RI restrictions with the highest allowed rank of the K RI restrictions. Optionally, the M RI restrictions of the K RI restrictions refer to the first M RI restrictions of the K RI restrictions. Optionally, the M RI restrictions of the K RI restrictions refer to the last M RI restrictions of the K RI restrictions. Here, the first M RI restrictions / the last M RI restrictions are determined based on the indication order (or configuration order) of the K RI restrictions.

[0384] ● Optionally, if the K RI restrictions are configured, the rank indicated by the CSI associated with CRI is the lowest rank of the allowed ranks associated with / indicated by the RI restrictions corresponding to the resource associated with the CRI. Optionally, if the K RI restrictions are configured, the rank indicated by the CSI associated with CRI is the highest rank of the allowed ranks associated with / indicated by the RI restrictions corresponding to the resource associated with the CRI. Optionally, Refer below for the method for determining the resource associated with CRI.

[0385] Optionally, the specific M resources may be at least one of the followings: the M resources with the smallest / largest resource ID of the K resources, or the M resources determined based on the configuration order of the resources in the resource set of the K resources. Optionally, the resource ID may be a configured resource ID. For example, NZP-CSI-RS-ResourceId. Optionally, the M resources in the K resources determined based on the configuration order of the resources in the resource set refer to the resources in the K resources configured based on the first M entries (or the last M entries) in the resource set. For example, the CSI-RS reference signal set includes {CSI-RS#4, CSI-RS#1, CSI-RS#3, CSI-RS#2}, M = 2. In the case of determining with the smallest CSI-RS resource ID, the specific M resources refer to CSI-RS#1 and CSI-RS#2. In the case of determining based on the first M entries in the resource set, the specific M resources refer to CSI-RS#4 and CSI-RS#1.

[0386] Optionally, a specific resource may be at least one of the followings: a resource with the smallest / largest resource ID of the K resources, or a resource determined based on the configuration order of the resources in the resource set. Optionally, the resource ID may be a configured resource ID. For example, NZP-CSI-RS-ResourceId. Optionally, a resource determined based on the configuration order of the resources in the resource set refers to the resource in the K resources configured based on the first entry (or the last entry) in the resource set. For example, the CSI-RS reference signal set includes {CSI-RS#4, CSI-RS#1, CSI-RS#3, CSI-RS#2}, M = 2. In the case of determining with the smallest CSI-RS resource ID, both CRIs are associated with / correspond to CSI-RS#1. In the case of determining based on the first entry in the resource set, both CRIs are associated with / correspond to CSI-RS#4.

[0387] Optionally, the eighth condition includes at least one of the followings:

[0388] ● The UE would multiplex CSI reports that include Part 2 CSI reports in a PUCCH resource;

[0389] ● The CSI associated with each of the M CRIs includes two parts and is multiplexed on PUCCH;

[0390] ● K RI restrictions are configured;

[0391] ● MRresources are not configured;

[0392] ● The CSI report includes the CSI corresponding to M resources;

[0393] ● The CSI report includes the CSI corresponding to M CRIs;

[0394] ● The CSI report includes the CSI corresponding to M sub-reports;

[0395] ● The report quantity parameter corresponding to (or configured by) the CSI reporting configuration includes at least 'RI';

[0396] ● The report quantity parameter (for example, reportQuantity) corresponding to (or configured by) the CSI reporting configuration is set to at least one of "cri-RI-PMI-CQI", "cri-RI-LI-PMI-CQI", "cri-RI-i1", "cri-RI-i1-CQI", "cri-RI-CQI";

[0397] ● The report quantity parameter (for example, reportQuantity) corresponding to (or configured by) the CSI reporting configuration is set to at least one of "cri-RI-PMI-CQI", "cri-RI-LI-PMI-CQI", "cri-RI-i1-CQI", "cri-RI-CQI";

[0398] ● The number of the reported resources is determined / indicated (refer above for the method of determining / indicating the number of the reported resources);

[0399] ● The number of the reported CRIs is determined / indicated (refer above for the method of determining / indicating the number of reported CRIs);

[0400] ● M is determined (refer above for the method of determining M);

[0401] ● The CSI reporting configuration includes a parameter indicating M;

[0402] ● The CSI reporting configuration includes an enabling parameter;

[0403] ● The number of the resources included in the resource set (for channel measurement) corresponding to the CSI reporting configuration is greater than 1;

[0404] ● The number of the resources included in the resource set (for channel measurement) corresponding to the CSI reporting configuration is greater than or equal to 2.

[0405] Refer above for the description for MR, the M-MRresources and the K-MRresources in the above method.

[0406] In the disclosure, the CSI reporting configuration and / or the CSI report associated with / corresponding to the CSI reporting configuration may be based on Artificial Intelligent / Machine Learning (AI / ML). In the disclosure, the term "AI / ML" may be used interchangeably with the term "AI / ML model" or "model". Optionally, the CSI reporting configuration and / or the CSI report associated with / corresponding to the CSI reporting configuration may be for inference. Optionally, the CSI reporting configuration and / or the CSI report associated with / corresponding to the CSI reporting configuration may be used for reporting the inference result. In the disclosure, the inference may be inference based on the AI / ML model. Optionally, the CSI reporting configuration and / or the CSI report associated with / corresponding to the CSI reporting configuration may be for model monitoring. In the disclosure, the model monitoring may be monitoring of the AI / ML model. Optionally, the CSI reporting configuration and / or the CSI report associated with / corresponding to the CSI reporting configuration may be for training. In the disclosure, the training may be training of the AI / ML model. Optionally, the CSI reporting configuration and / or the CSI report associated with / corresponding to the CSI reporting configuration may be for data collection. In the disclosure, the data collection may be data collection for the AI / ML model.

[0407] In the disclosure, the CSI reporting configuration and / or the CSI report associated with / corresponding to the CSI reporting configuration may be applicable to a UE-side model. For example, when the UE-side model is deployed / used, operations related to the CSI reporting configuration and / or the CSI report associated with / corresponding to the CSI reporting configuration may be used.

[0408] In some cases, the UE may receive / be configured with the CSI reporting configuration. Optionally, the CSI reporting configuration is used for beam reporting. Optionally, the CSI reporting configuration is used for CSI acquisition.

[0409] The reference signal resource associated with the CSI reporting configuration is discussed below.

[0410] Optionally, the reference signal resource associated with the CSI reporting configuration may include the reference signal resource indicated / configured by the CSI reporting configuration. Optionally, the CSI reporting configuration may indicate / be configured with / be associated with / correspond to K resources, where K 1. Optionally, the CSI reporting configuration may indicate / be configured with / be associated with / correspond to X resource sets. Optionally, X≥1, or X>1. Optionally, each of the X resource sets includes K resources. Optionally, the x-th resource set of the X resource sets includes Kxresources. Optionally, 1 x≤X. Optionally, the X resource sets may be indicated by the base station. For example, the X resource sets may be configured by the parameter in the CSI reporting configuration. Optionally, the X resource sets may be the resource sets for channel measurement. Optionally, at least one of the X resource sets may be used for measurement and / or for link quality assessment. Optionally, the measurement may be channel measurement and / or interference measurement. Optionally, the types of the reference signals in at least one of the X resource sets are the same. Optionally, the type of the reference signal includes SSB and CSI-RS. Optionally, the type of CSI-RS includes reference signal for tracking, reference signal for beam management, and reference signal for CSI acquisition.

[0411] The CSI report associated with the CSI reporting configuration is discussed below. In the disclosure, the CSI report may be the report including the CSI. Optionally, the CSI report associated with the CSI reporting configuration may be generated based on the measurement of the reference signal resource associated with the CSI reporting configuration. Optionally, the CSI report associated with the CSI reporting configuration may be generated based on the measurement of the reference signal resources in the X resource sets. The CSI reported by the UE takes CRI, SSBRI and L1-RSRP as examples below, but is not limited thereto. The CSI reported by the UE may also be of other types, such as SINR, CQI, etc. In the disclosure, L1-RSRP reported by the UE may be referred to as the reported L1-RSRP.

[0412] The L1-RSRP reported by the UE may be absolute L1-RSRP or differential L1-RSRP.

[0413] The absolute L1-RSRP is determined based on the measured L1-RSRP. The measured L1-RSRP may be quantized as the value of the absolute L1-RSRP. The value of the absolute L1-RSRP is a 7-bit value. The value of the absolute L1-RSRP is ranged from -140 dBm to -44 dBm. The value of the absolute L1-RSRP corresponds to a step size of 1 dB. The mapping relation between the value of the absolute L1-RSRP and the measured L1-RSRP is shown in Table 3 below. Optionally, the first codepoint of the value of the absolute L1-RSRP may correspond to RSRP_16. The second codepoint of the value of the absolute L1-RSRP may correspond to RSRP_17, and so on. Optionally, the first codepoint of the value of the absolute L1-RSRP may correspond to RSRP_113. The second codepoint of the value of the absolute L1-RSRP may correspond to RSRP_112, and so on. In Table 3, the value corresponding to RSRP_x is x. For example, the value corresponding to RSRP_0 is 0. Optionally, the 17th codepoint of the value of the absolute L1-RSRP may correspond to RSRP_16. The 18th codepoint of the value of the absolute L1-RSRP may correspond to RSRP_17, and so on.

[0414]

[0415]

[0416] Table 3

[0417] The differential L1-RSRP may be determined based on the measured L1-RSRP and the reference L1-RSRP. The difference of the measured L1-RSRP and the reference L1-RSRP may be quantized as the value of the differential L1-RSRP. The value of the differential L1-RSRP is a 4-bit value. The value of the differential L1-RSRP corresponds to a step size of 2 dB. The mapping relation between the value of the differential L1-RSRP and the difference between the measured L1-RSRP and the reference L1-RSRP is shown in Table 4 below. ΔRSRP represents the difference between L1-RSRP. Optionally, the first codepoint of the value of the differential L1-RSRP may correspond to DIFFRSRP_0. The second codepoint of the value of the differential L1-RSRP may correspond to DIFFRSRP_1, and so on. Optionally, the first codepoint of the value of the differential L1-RSRP may correspond to DIFFRSRP_15. The second codepoint of the value of the differential L1-RSRP may correspond to DIFFRSRP_14, and so on. Optionally, in Table 4, the value corresponding to DIFFRSRP_x is x. For example, the value corresponding to DIFFRSRP_0 is 0.

[0418]

[0419] Table 4

[0420] Optionally, the UE may report CRIs or SSBRIs corresponding to N reference signal resources. For example, the UE reports N CRI / SSBRIs, where the N CRI / SSBRIs respectively correspond to the N reported resources in the resource set. When the resources in the X resource sets are SSB resources, the UE reports N SSBRIs. When the resources in the X resource sets are CSI-RS resources, the UE reports N CRIs.

[0421] Optionally, the UE may be configured with the number (N) of the reported reference signal resources, where N 1. Optionally, the reference signal resource is the resource in the resource set. Optionally, N≤N_max, where N_max is determined based on the UE capability. Optionally, N_max represents the maximum number of the reported reference signal resources supported by the UE as indicated by the UE capability. Optionally, N_max represents the maximum number of the reported resources in the resource set supported by the UE as indicated by the UE capability. Optionally, N may be predefined or indicated by the base station. For example, N may be indicated by the parameter in the CSI reporting configuration. Optionally, the value of N may be one of 1, 2, 3 and 4. Optionally, the value of N may be an integer greater than or equal to 1.

[0422] When X is greater than 1, the mapping relation between the resources in multiple resource sets and associated UCI (for example, CRIs / SSBRIs, and / or resource set indicators) and / or the size of the CSI field corresponding to UCI is unclear. The following method provides the mapping method between the resources in multiple resource sets and CRI / SSBRI and / or the determination method for the size of the CSI field corresponding to CRI / SSBRI, preventing the UE from reporting the corresponding resource using erroneous CRI / SSBRI, improving the reliability of the communication system.

[0423] Optionally, the UE may report N CRIs / SSBRIs. Optionally, the size (S) of the CSI field corresponding to a CRI / SSBRI is determined based on the X resource sets. For example, . Here, refer above for the definition of . The value k (k 0) of CRI / SSBRI corresponds to the b-th resource of the a-th resource set, where . Here, the a-th resource set refers to the a-th resource set of the X resource sets. Optionally, the order of the X resource sets is determined based on the order of the configuration information corresponding to the X resource sets respectively. For example, the first configuration information of X configuration information corresponding to the X resource sets corresponds to the first resource set. Optionally, the order of the X resource sets is determined based on the order (for example, ascending / descending order) of the resource set IDs corresponding to the X resource sets respectively. For example, the resource set with the smallest ID of the X resource sets is the first resource set of the X resource sets. Optionally, the order of the resources in a resource set may be determined based on the order (for example, ascending / descending order) of the resource IDs. For example, the first resource in the resource set refers to the resource with the smallest value of ID in the resource set. Optionally, the order of resources in a resource set may be determined based on the order of the resources in the resource set.

[0424] Optionally, the UE may report N CRIs / SSBRIs. Optionally, the size (S) of the CSI field corresponding to a CRI / SSBRI is determined based on X and / or K. For example, . Optionally, bits in the CSI field corresponding to CRI / SSBRI may be used to indicate the resource set. Optionally, the value k1 (k1 0) of the bits corresponds to the (k1+1)-th resource set. Optionally, the bits refer to the first bits / the last bits in the CSI field corresponding to CRI / SSBRI. Optionally, the bits in the CSI field corresponding to CRI / SSBRI is used to indicate a resource in the resource set. Optionally, the value k2 (k2 0) of the bits corresponds to the (k2+1)-th resource in the resource set. Optionally, the value k2 (k2 0) of the bits corresponds to the (k2+1)-th resource in the resource set (indicated by / corresponding to k1, or indicated by / corresponding to CRI / SSBRI).

[0425] Optionally, the UE may report the resource set indicators corresponding to the N reference signal resources and / or N CRIs / SSBRIs. Optionally, the size (V) of the CSI field corresponding to the resource set indicator is determined based on X. For example, V= . Optionally, the resource set indicator may be used to indicate the resource set. Optionally, the value k3 (k3 0) of the resource set indicator corresponds to the (k3+1)-th resource set. Optionally, the resource set indicators corresponding to the N reference signal resources may correspond one-to-one to the N CRIs / SSBRIs. Optionally, the resource set indicator may be used to indicate the resource set where the resource indicated by the corresponding CRI / SSBRI is located. Optionally, the size of the CSI field corresponding to the CRI / SSBRI corresponding to the resource set indicator is . Optionally, the value k (k 0) of CRI / SSBRI corresponds to the (k+1)-th resource in the resource set.

[0426] Optionally, the UE may report L1-RSRP of the resources in the resource set. Optionally, the UE may report L1-RSRP of the N reference signal resources in the resource set. Optionally, the UE may report N L1-RSRP of N reference signal resources in the resource set. Optionally, the N reference signal resources may correspond one-to-one to the N L1-RSRP. Optionally, the N L1-RSRP may be determined based on measurement of the N reference signal resources, respectively. Optionally, L1-RSRP of the N reference signal resources refer to L1-RSRP of each reference signal resource of the N reference signal resources, or N L1-RSRP of each reference signal resource of the N reference signal resources.

[0427] In some cases, the UE may receive / be configured with the CSI reporting configuration. Optionally, the CSI reporting configuration is used for beam reporting. Optionally, the CSI reporting configuration is used for CSI acquisition.

[0428] The reference signal resource associated with the CSI reporting configuration is discussed below.

[0429] Optionally, the reference signal resource associated with the CSI reporting configuration may include the reference signal resource indicated / configured by the CSI reporting configuration. Optionally, the CSI reporting configuration may indicate / be configured with / be associated with / correspond to K resources, where K 1. Optionally, the CSI reporting configuration may indicate / be configured with / be associated with / correspond to a resource set. Optionally, the resource set may include K resources. Optionally, K may be the size of the resource set. Optionally, the resource set may be configured by the parameter in the CSI reporting configuration. Optionally, the resource set may be the resource set for channel measurement. Optionally, the resource set may be used for measurement and / or for link quality assessment. Optionally, the measurement may be channel measurement and / or interference measurement. Optionally, the types of the reference signals in the resource set are the same. Optionally, the type of the reference signal includes SSB and CSI-RS. Optionally, the type of the CSI-RS includes reference signal for tracking, reference signal for beam management, and reference signal for CSI acquisition.

[0430] The CSI report associated with the CSI reporting configuration is discussed below. In the disclosure, the CSI report may be the report including the CSI. Optionally, the CSI report associated with the CSI reporting configuration may be generated based on the measurement of the reference signal resource associated with the CSI reporting configuration. Optionally, the CSI report associated with the CSI reporting configuration may be generated based on the measurement of the reference signal resources in the resource set. The CSI reported by the UE takes CRI, SSBRI and L1-RSRP as examples below, but is not limited thereto. The CSI reported by the UE may also be of other types, such as SINR, CQI, etc. In the disclosure, L1-RSRP reported by the UE may be referred to as the reported L1-RSRP.

[0431] The L1-RSRP reported by the UE may be absolute L1-RSRP or differential L1-RSRP. Refer above for description of absolute L1-RSRP / differential L1-RSRP.

[0432] Optionally, the UE may be configured with the number (N) of the reported reference signal resources, where N 1. Optionally, the reference signal resource is the resource in the resource set. Optionally, N≤N_max, where N_max is determined based on the UE capability. Optionally, N_max represents the maximum number of the reported reference signal resources supported by the UE as indicated by the UE capability. Optionally, N_max represents the maximum number of the reported resources in the resource set supported by the UE as indicated by the UE capability. Optionally, N may be predefined or indicated by the base station. For example, N may be indicated by the parameter in the CSI reporting configuration. Optionally, the value of N may be one of 1, 2, 3 and 4. Optionally, the value of N may be an integer greater than or equal to 1. Optionally, N k.

[0433] Optionally, the UE may report L1-RSRP of the resources in the resource set. Optionally, the UE may report L1-RSRP of the N reference signal resources in the resource set. Optionally, the UE may report N L1-RSRP of N reference signal resources in the resource set. Optionally, the N reference signal resources may correspond one-to-one to the N L1-RSRP. Optionally, the N L1-RSRP may be determined based on measurement of the N reference signal resources, respectively. Optionally, L1-RSRP of the N reference signal resources refer to L1-RSRP of each reference signal resource of the N reference signal resources, or N L1-RSRP of each reference signal resource of the N reference signal resources.

[0434] Optionally, when N=K, the UE reports N L1-RSRP (for example, L1-RSRP of the N reference signal resources) and a CRI / SSBRI (for example, CRI / SSBRI#Y). Optionally, the CRI / SSBRI is used to indicate the resource corresponding to the highest L1-RSRP of the N L1-RSRP. Optionally, the CRI / SSBRI is used to indicate the resource corresponding to the highest L1-RSRP in the resource set. Here, the highest L1-RSRP may be the highest measured L1-RSRP. Optionally, the size of the CSI field corresponding to CRI / SSBRI is . Optionally, the value k (k 0) of CRI / SSBRI corresponds to the (k+1)-th resource in the resource set. Optionally, the N L1-RSRP may be L1-RSRP#1, L1-RSRP#2, ..., L1-RSRP#N. Optionally, L1-RSRP#1 is absolute L1-RSRP. Optionally, L1-RSRP#2, ..., L1-RSRP#N are differential L1-RSRP. Optionally, the resource corresponding to L1-RSRP#1 is indicated by CRI / SSBRI. L1-RSRP#2, ..., L1-RSRP#N respectively correspond to K-1 resources in the resource set. Optionally, the K-1 resources refer to the resources in the resource set not indicated by CRI / SSBRI. Optionally, the K-1 resources refer to the resources in the resource set not corresponding to the resource indicated by CRI / SSBRI. Optionally, the K-1 resources refer to the resources in the resource set other than the resource indicated by CRI / SSBRI. L1-RSRP#2, ..., L1-RSRP#N and the K-1 resources are determined based on the order of the K-1 resources. Optionally, the order of the K-1 resources may be the order based on the IDs of the resources (for example, ascending / descending order of the values of the IDs of the resources). Optionally, the order of the K-1 resources may be based on the order of the resources in the resource set. Optionally, the order of the K-1 resources may be the order of configuration information corresponding to the resources. For example, the k-th resource of the K-1 resources corresponds to the k-th resource configuration information of the K-1 resource configuration information corresponding to the K-1 resources. The above method defines the mapping relation between the reported resources and the reported CSI when N=K, avoiding the inconsistency between the measurement result reported by the UE and the corresponding CSI and improving the reliability of the communication system.

[0435] Optionally, the UE may report first report content or second report content. Optionally, when N=K, refer above for the CSI included in the first report content or the second report content. Optionally, when N<K, the description associated with the first report content or the second report content is as follows. Optionally, the first report content or the second report content reported by the UE may be indicated by the base station. For example, the CSI reporting configuration may include an RRC parameter indicating whether the UE reports the first report content or the second report content. The above method can allow the base station to select among different report contents, improving the flexibility of the communication system.

[0436] Optionally, the first report content includes N CRIs / SSBRIs and N L1-RSRP. Optionally, when N<K, the first report content includes N CRIs / SSBRIs and N L1-RSRP. Optionally, the N CRIs / SSBRIs may one-to-one correspond to the N L1-RSRP. Optionally, the N CRIs / SSBRIs correspond to N reported reference signal resources. The N L1-RSRP may be L1-RSRP#1, L1-RSRP#2, ..., L1-RSRP#N. Optionally, L1-RSRP#1 is absolute L1-RSRP. Optionally, L1-RSRP#2, ..., L1-RSRP#N are differential L1-RSRP. Optionally, the N CRIs / SSBRIs include CRI / SSBRI#1, CRI / SSBRI#2, ..., CRI / SSBRI#N. Optionally, CRI / SSBRI#n corresponds to L1-RSRP#n.

[0437] Optionally, refer Table 5 for the mapping order of the CSI fields associated with the first report content. When N=K, CRI / SSBRI#Y is reported. When N<K, CRI / SSBRI#Y is not reported. When N=K, CRI / SSBRI#1, CRI / SSBRI#2, ..., CRI / SSBRI#N are not reported. When N<K, CRI / SSBRI#1, CRI / SSBRI#2, ..., CRI / SSBRI#N are reported. Optionally, L1-RSRP#1 is absolute L1-RSRP. Optionally, L1-RSRP#2, ..., L1-RSRP#N are differential L1-RSRP. When N=K, L1-RSRP#1 corresponds to CRI / SSBRI#Y. When N=K, L1-RSRP#1 corresponds to the resource associated with CRI / SSBRI#Y. When N=K, L1-RSRP#2, ..., L1-RSRP#N respectively correspond to the K-1 resources in the resource set. Refer above for description of the K-1 resources. When N<K, CRI / SSBRI#1, CRI / SSBRI#2, ..., CRI / SSBRI#N correspond to L1-RSRP#1, L1-RSRP#2, ..., L1-RSRP#N, respectively. The above method defines the reporting condition and order relation of each CSI field in the first report content, preventing the UE from reporting the CSI in a wrong way and improving the reliability of the communication system.

[0438]

[0439] Table 5. Mapping order of the CSI fields associated with the first report content

[0440] Optionally, the second report content includes a bitmap, a resource indicator and N L1-RSRP. Optionally, when N<K, the second report content includes a bitmap, a resource indicator and N L1-RSRP.

[0441] Optionally, the bitmap includes / corresponds to K bits, for example, b0, b1, ..., bK-1. Optionally, b0is MSB and bK-1is LSB; or b0is LSB and bK-1is MSB. Optionally, each bit in the bitmap is one-to-one corresponding to the K resources in the resource set. For example, the K bits in the bitmap may be mapped with the K resources based on the order of the K resources and / or the order of bits in the bitmap (for example, the order of bits with a first value or the order of bits with the first value in the bitmap). Optionally, the order of the K resources may be the order based on the IDs of the resources (for example, ascending / descending order of the values of the IDs of the resources). Optionally, the order of the K resources may be based on the order of the resources in the resource set. Optionally, the order of the K resources may be the order of the configuration information corresponding to the resources. For example, the k-th resource of the K resources corresponds to the k-th resource configuration information corresponding to the K resources. For example, b0corresponds to the first resource of the K resources. For example, b0corresponds to the first resource in the resource set. Optionally, the k-th bit in the bitmap corresponds to the k-th resource in the resource set. Optionally, the k-th LSB / MSB in the bitmap corresponds to the k-th resource in the resource set. Optionally, k 1 and / or k≤K. When the value of a bit in the bitmap is a first value (for example, "1"), the corresponding resource is reported. When the value of a bit in the bitmap is a second value (for example, "0"), the corresponding resource is not reported. The resource being reported may be the L1-RSRP associated with the resource being reported. The resource being reported may be the L1-RSRP determined by the resource being reported. The resource being not reported may be the L1-RSRP associated with the resource being not reported. The resource being not reported may be the L1-RSRP determined by the resource being not reported. Optionally, the number of bits with the first value in the bitmap is N. The above method defines the method of indicating the reported resource by using the bitmap when N<K, avoiding the inconsistency between the measurement result reported by the UE and the corresponding CSI and improving the reliability of the communication system.

[0442] Optionally, the resource indicator is used to indicate the resource corresponding to the highest L1-RSRP of the N L1-RSRP. Optionally, the resource indicator is used to indicate the resource corresponding to the highest L1-RSRP of the N reported resources. Optionally, the resource indicator is used to indicate the resource corresponding to one of N bits with the first value in the bitmap, wherein the resource corresponds to the highest L1-RSRP. Here, the highest L1-RSRP may be the highest measured L1-RSRP. The highest L1-RSRP may be the highest L1-RSRP of the N L1-RSRP. Optionally, the size of the CSI field corresponding to the resource indicator is . Optionally, the value n (n 0) of the resource indicator corresponds to the (n+1)-th resource of the N reported resources. The order of the N reported resources is determined based on the order of the resources corresponding to the bits with the first value in the bitmap. For example, the k-th bit with the first value in the bitmap corresponds to the k-th reported resource. For example, k≥1 and / or k≤N. For example, k may be any integer ranged from 1 to N. For example, the first bit with the first value starting from LSB / MSB in the bitmap corresponds to the first reported resource. The above method defines the method of reporting the resource with the highest L1-RSRP by using the resource indicator when N<K, so that the L1-RSRP reporting of the UE can be differentially reported based on the resource with the highest L1-RSRP, saving the overhead of reporting signaling.

[0443] Optionally, the N L1-RSRP may be L1-RSRP#1, L1-RSRP#2, ..., L1-RSRP#N. Optionally, L1-RSRP#1 is absolute L1-RSRP. Optionally, L1-RSRP#2, ..., L1-RSRP#N are differential L1-RSRP. Optionally, the resource corresponding to L1-RSRP#1 is indicated by the resource indicator. L1-RSRP#2, ..., L1-RSRP#N correspond to N-1 resources, respectively. Optionally, the N-1 resources refer to the resources in the resource set not indicated by the resource indicator. Optionally, the N-1 resources refer to the resources of the N reported resources not corresponding to the resource corresponding to the resource indicator. Optionally, the K-1 resources refer to the resources other than the resource indicated by the resource indicator of the N reported resources. L1-RSRP#2, ..., L1-RSRP#N and the N-1 resources are determined based on the order of the N-1 resources. Optionally, the order of the N-1 resources may be the order based on the IDs of the resources (for example, ascending / descending order of the values of the IDs of the resources). Optionally, the order of the N-1 resources may be based on the order of the resources in the resource set. Optionally, the order of the N-1 resources may be the order of the configuration information corresponding to the resources. Optionally, the order of the N-1 resources may be the order of the bits with the first value in the bitmap.

[0444] Optionally, refer Table 6 for the mapping order of the CSI fields associated with the second report content. When N=K, CRI / SSBRI#Y is reported. When N<K, CRI / SSBRI#Y is not reported. When N=K, the bitmap is not reported. When N<K, the bitmap is reported. Optionally, L1-RSRP#1 is absolute L1-RSRP. Optionally, L1-RSRP#2, ..., L1-RSRP#n are differential L1-RSRP. When N=K, L1-RSRP#1 corresponds to CRI / SSBRI#Y. When N=K, L1-RSRP#1 corresponds to the resource associated with CRI / SSBRI#Y. When N=K, L1-RSRP#2, ..., L1-RSRP#N respectively correspond to the K-1 resources in the resource set. Refer above for description of the K-1 resources. When N=K, the resource indicator is not reported. When N<K, the resource indicator is reported. When N<K, refer above for the corresponding relation among the resource indicator, the bitmap and L1-RSRP. The above method defines the reporting condition and order relation of each CSI field in the second report content, preventing the UE from reporting the CSI in a wrong way and improving the reliability of the communication system.

[0445]

[0446] Table 6. Mapping order of the CSI fields associated with the second report content

[0447] FIG. 5 illustrates a method 500 performed by a base station according to various embodiments of the disclosure. The method 500 includes: at 501, the base station transmits a CSI reporting configuration to the UE, where the CSI reporting configuration indicates K resources for the CLI measurement, K 1; and at 502, the base station receives CSI determined based on the CSI reporting configuration from the UE, where the CSI includes CSI associated with the weakest N resources and / or the strongest N resources of the K resources for the CLI measurement, where N K.

[0448] FIG. 6 illustrates a structure 600 of a user equipment according to various embodiments of the disclosure. As shown in FIG. 6, the user equipment 600 includes a controller 610 and a transceiver 620, where the controller 610 is configured to perform various methods disclosed herein as performed by the user equipment, and the transceiver 620 is configured to transmit and receive channels or signals.

[0449] FIG. 7 illustrates a structure 700 of a base station according to various embodiments of the disclosure. As shown in FIG. 7, the network device 700 includes a controller 710 and a transceiver 720, where the controller 710 is configured to perform various methods disclosed herein as performed by the network device, and the transceiver 720 is configured to transmit and receive channels or signals.

[0450] Furthermore, "at least one entry / at least one" described in the disclosure includes any and / or all possible combinations of the listed items, and various embodiments and various examples of the embodiments described in the disclosure may be used in any appropriate form changes and combinations, and " / " described in the disclosure means "or".

[0451] The various illustrative logical blocks, modules, and circuits described in the disclosure may be implemented or performed with a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0452] The steps of a method or algorithm described in the disclosure may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.

[0453] In one or more exemplary designs, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. Storage media may be any available media that can be accessed by a general purpose or special purpose computer.

[0454] The description set forth herein, in connection with the appended drawings, describes example configurations, methods, and apparatuses and does not represent all the examples that may be implemented or that are within the scope of the claims. The term "example" used herein means "serving as an example, instance, or illustration" and not "preferred" or "advantageous over other examples". The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

[0455] While this specification contains many specific implementation details, these should not be construed as limitations on the scope of any inventions or of what may be claimed, but rather as descriptions of features specific to particular embodiments of particular inventions. Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variant of a subcombination.

[0456] It is to be understood that the specific order or hierarchy of steps in the methods of the disclosure is an illustration of exemplary processes. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the methods may be rearranged to achieve the functions and effects disclosed herein. The accompanying method claims present elements of the various steps in a sample order, and are not meant to be limited to the specific order or hierarchy presented unless specifically recited therein. Furthermore, although elements may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated. Accordingly, the disclosure is not limited to illustrated examples and any means for performing the functionality described herein are included in aspects of the disclosure.

[0457] The text and drawings are provided as examples only to help readers understand the disclosure. They are not intended and should not be interpreted as limiting the scope of the disclosure in any way. Although certain embodiments and examples have been provided, based on the content disclosed herein, it is obvious to those skilled in the art that modifications to the illustrated embodiments and examples can be made without departing from the scope of the disclosure.

Claims

1.A method performed by a user equipment (UE), wherein the method comprising:receiving, from a base station (BS), information for a channel state information (CSI) report associated with a CSI- reference signal (RS) resource set;in case that the information for CSI report includes a value, M, identifying a physical uplink control channel (PUCCH) resource and a number of physical resource block(PRB)s for the PUCCH resource assuming that sub-reports corresponding to M CSIs in the CSI report indicate a predefined rank;transmitting, to the BS, the CSI report including the M CSIs on the PUCCH resource.2.A method of claim 1, wherein the CSI-RS resource set consists of K CSI-RS resources, wherein the M CSIs correspond to M selected resources from the K CSI-RS resources, wherein M is less or equal to K.3.A method of claim 1, wherein the predefined rank is rank 1.4.A method of claim 1, wherein the M CSIs include M CSI- resource indicator(CRI)s.5.A method performed by a base station (BS), wherein the method comprising:transmitting, to a user equipment (UE), information for a channel state information (CSI) report associated with a CSI- reference signal (RS) resource set;receiving, from the UE, a CSI report including M CSIs on a physical uplink control channel (PUCCH) resource,wherein the PUCCH resource and a number of physical resource block(PRB)s for the PUCCH resource are identified assuming that sub-reports corresponding to M CSIs in the CSI report indicate a predefined rank, in case that the information for the CSI report includes a value, M.6.A method of claim 5, wherein the CSI-RS resource set consists of K CSI-RS resources, wherein the M CSIs correspond to M selected resources from the K CSI-RS resources, wherein M is less or equal to K.7.A method of claim 5, wherein the predefined rank is rank 1.8.A method of claim 5, wherein the M CSIs include M CSI- resource indicator(CRI)s.9.A user equipment (UE) in a wireless communication system, comprising:a transceiver; anda controller coupled to the transceiver and configured to:receive, from a base station (BS), information for a channel state information (CSI) report associated with a CSI- reference signal (RS) resource set,in case that the information for CSI report includes a value, M, identify a physical uplink control channel (PUCCH) resource and a number of physical resource block(PRB)s for the PUCCH resource assuming that sub-reports corresponding to M CSIs in the CSI report indicate a predefined rank,transmit, to the BS, the CSI report including the M CSIs on the PUCCH resource.10.The UE of claim 9, wherein the CSI-RS resource set consists of K CSI-RS resources, wherein the M CSIs correspond to M selected resources from the K CSI-RS resources, wherein M is less or equal to K.11.The UE of claim 9, wherein the predefined rank is rank 1.12.The UE of claim 9, wherein the M CSIs include M CSI- resource indicator(CRI)s.13.A base station (BS) in a wireless communication system, comprising:a transceiver; anda controller coupled to the transceiver and configured to:transmit, to a user equipment (UE), information for a channel state information (CSI) report associated with a CSI- reference signal (RS) resource set;receive, from the UE, a CSI report including M CSIs on a physical uplink control channel (PUCCH) resource,wherein the PUCCH resource and a number of physical resource block(PRB)s for the PUCCH resource are identified assuming that sub-reports corresponding to M CSIs in the CSI report indicate a predefined rank, in case that the information for the CSI report includes a value, M.14.The BS of claim 13, wherein the CSI-RS resource set consists of K CSI-RS resources, wherein the M CSIs correspond to M selected resources from the K CSI-RS resources, wherein M is less or equal to K.15.The BS of claim 13, wherein the predefined rank is rank 1.

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