Method and device for receiving and transmitting information in wireless communication system

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The embodiment of the disclosure provides a method performed by a UE including receiving a CSI reporting configuration regarding a UE initiated reporting for a reference signal resource set, wherein the CSI reporting configuration includes a parameter associated with an event type set to event 1; in case that an event instance is determined based on L1-RSRP of a first reference signal associated with an indicated TCI state being lower than a threshold, transmitting a first UL channel; after transmitting the first UL channel, transmitting, on a second UL channel, a CSI report including a first absolute L1-RSRP of the first reference signal associated with the indicated TCI state and a second absolute L1-RSRP of a second reference signal in the reference signal resource set.

Description

METHOD AND DEVICE FOR RECEIVING AND TRANSMITTING INFORMATION IN WIRELESS COMMUNICATION SYSTEM

[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 enhance the scheduling efficiency of the wireless communication system, a base station needs to obtain channel state information (CSI) in order to schedule accordingly based on the CSI fed back by a terminal device. However, how to further enhance the performance associated with the CSI report is a problem to be solved.

[0009] The embodiment of the disclosure provides a method performed by a UE including receiving a CSI reporting configuration regarding a UE initiated reporting for a reference signal resource set, wherein the CSI reporting configuration includes a parameter associated with an event type set to event 1; in case that an event instance is determined based on L1-RSRP of a first reference signal associated with an indicated TCI state being lower than a threshold, transmitting a first UL channel; after transmitting the first UL channel, transmitting, on a second UL channel, a CSI report including a first absolute L1-RSRP of the first reference signal associated with the indicated TCI state and a second absolute L1-RSRP of a second reference signal in the reference signal resource set.

[0010] 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.

[0011] FIG. 1 illustrates an overall structure of an example wireless communication network according to various embodiments of the disclosure;

[0012] FIG. 2a illustrates a transmission path in a wireless communication network according to various embodiments of the disclosure;

[0013] FIG. 2b illustrates a reception path in a wireless communication network according to various embodiments of the disclosure;

[0014] FIG. 3a illustrates structures of a user equipment (UE) in a wireless communication network according to various embodiments of the disclosure;

[0015] FIG. 3b illustrates structures of a base station in a wireless communication network according to various embodiments of the disclosure;

[0016] FIG. 4 illustrates a method performed by a UE according to various embodiments of the disclosure;

[0017] FIG. 5 illustrates a method performed by a base station according to various embodiments of the disclosure;

[0018] FIG. 6 illustrates a structure of a user equipment according to various embodiments of the disclosure;

[0019] FIG. 7 illustrates a structure of a base station according to various embodiments of the disclosure.

[0020] In order to enhance the scheduling efficiency of the wireless communication system, a base station needs to obtain channel state information (CSI) in order to schedule accordingly based on the CSI fed back by a terminal device. However, how to further enhance the performance associated with the CSI report is a problem to be solved.

[0021] An aspect of the disclosure provides a method performed by a user equipment UE in a wireless communication system, the method includes receiving a channel state information (CSI) reporting configuration regarding a UE initiated reporting for a reference signal resource set, wherein the CSI reporting configuration includes a parameter associated with an event type set to event 1; in case that an event instance is determined based on layer 1-reference signal received power (L1-RSRP) of a first reference signal associated with an indicated transmission configuration indicator (TCI) state being lower than a threshold, transmitting a first uplink (UL) channel; after transmitting the first UL channel, transmitting, on a second UL channel, a CSI report including a first absolute L1-RSRP of the first reference signal associated with the indicated TCI state and a second absolute L1-RSRP of a second reference signal in the reference signal resource set.

[0022] In an example, the indicated TCI state is applied to a first component carrier (CC), in case that a first parameter is configured in the CSI reporting configuration, the first CC is indicated by the first parameter, and in case that the first parameter is not configured in the CSI reporting configuration, the first CC is same as a CC of the CSI reporting configuration.

[0023] In an example, the threshold indicated by a second parameter in the CSI reporting configuration is configured based on values from 16 to 113.

[0024] In an example, the second parameter is an integer.

[0025] In an example, the CSI report includes N CSI-RS resource indicator (CRI) or N synchronization signal (SS) / physical broadcast channel (PBCH) block resource indicator (SSBRI) corresponding to at least one reference signal in the reference signal resource set.

[0026] In an example, the CSI report includes an absolute L1-RSRP or a differential L1-RSRP for each of the N CRI or the N SSBRI.

[0027] In an example, the first reference signal associated with the indicated TCI state is a reference signal of the indicated TCI state or SS / PBCH block which is quasi-co-located with the reference signal of the indicated TCI state.

[0028] In an example, the indicated TCI state is associated with a dl-OrJointTCI-StateList.

[0029] Another aspect of the disclosure provides a method performed by a base station in a wireless communication system, the method includes transmitting a channel state information (CSI) reporting configuration regarding a user equipment (UE) initiated reporting for a reference signal resource set, wherein the CSI reporting configuration includes a parameter associated with an event type set to event 1; in case that an event instance is determined based on layer 1-reference signal received power (L1-RSRP) of a first reference signal associated with an indicated transmission configuration indicator (TCI) state being lower than a threshold, receiving, from a UE, a first uplink (UL) channel; and after receiving the first UL channel, receiving, on a second UL channel, a CSI report including a first absolute L1-RSRP of the first reference signal associated with the indicated TCI state and a second absolute L1-RSRP of a second reference signal in the reference signal resource set.

[0030] Another aspect of the disclosure provides a UE in a wireless communication system, the UE includes a transceiver; and at least one processor coupled with the transceiver and configured to: receive a channel state information (CSI) reporting configuration regarding a UE initiated reporting for a reference signal resource set, wherein the CSI reporting configuration includes a parameter associated with an event type set to event 1, in case that an event instance is determined based on layer 1-reference signal received power (L1-RSRP) of a first reference signal associated with an indicated transmission configuration indicator (TCI) state being lower than a threshold, transmit a first uplink (UL) channel, and after transmitting the first UL channel, transmit, on a second UL channel, a CSI report including a first absolute L1-RSRP of the first reference signal associated with the indicated TCI state and a second absolute L1-RSRP of a second reference signal in the reference signal resource set.

[0031] Another aspect of the disclosure provides a base station in a wireless communication system, the base station includes a transceiver; and at least one processor coupled with the transceiver and configured to: transmit a channel state information (CSI) reporting configuration regarding a user equipment (UE) initiated reporting for a reference signal resource set, wherein the CSI reporting configuration includes a parameter associated with an event type set to event 1, in case that an event instance is determined based on layer 1-reference signal received power (L1-RSRP) of a first reference signal associated with an indicated transmission configuration indicator (TCI) state being lower than a threshold, receive, from a UE, a first uplink (UL) channel, and after receiving the first UL channel, receive, on a second UL channel, a CSI report including a first absolute L1-RSRP of the first reference signal associated with the indicated TCI state and a second absolute L1-RSRP of a second reference signal in the reference signal resource set.

[0032] The method provided by the application improves the performance of CSI, thereby improving the scheduling efficiency of the communication system.

[0033] 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 may 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.

[0034] 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.

[0035] 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.

[0036] The term "include" or "may include" refers to the existence of a corresponding disclosed function, operation or component which may 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.

[0037] 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.

[0038] 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.

[0039] The various embodiments of the disclosure may 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 may be applied to future oriented communication technologies.

[0040] 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".

[0041] 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.

[0042] 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.

[0043] 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.

[0044] The transmission from a base station to a user equipment (UE) is called downlink, and the transmission from the UE to the base station is called uplink.

[0045] 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 may be used without departing from the scope of the disclosure.

[0046] 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.

[0047] Depending on a type of the network, other well-known terms such as "base station" or "access point" may 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" may 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).

[0048] 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 may communicate with each other and with UEs 111-116 using 5G, Long Term Evolution (LTE), LTE-A, WiMAX or other advanced wireless communication technologies.

[0049] 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.

[0050] 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.

[0051] Although FIG. 1 illustrates an example of the wireless network100, various changes may be made to FIG. 1. The wireless network100 may include any number of gNBs and any number of UEs in any suitable arrangement, for example. Furthermore, gNB 101 may directly communicate with any number of UEs and provide wireless broadband access to the network130 for those UEs. Similarly, each gNB 102-103 may 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 may provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0052] FIGs. 2a and 2b illustrate example wireless transmission and reception paths according to the disclosure. In the following description, the transmission path 200 may be described as being implemented in a gNB, such as gNB 102, and the reception path 250 may be described as being implemented in a UE, such as UE 116. However, it should be understood that the reception path 250 may be implemented in a gNB and the transmission path 200 may 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.

[0053] The transmission path 200 includes a channel coding and modulation block 205, a Serial-to-Parallel (S-to-P) block 210, a size N Inverse Fast Fourier Transform (IFFT) block 215, a Parallel-to-Serial (P-to-S) block 220, a cyclic prefix addition block 225, and an up-converter (UC) 230. The reception path 250 includes a down-converter (DC) 255, a cyclic prefix removal block 260, a Serial-to-Parallel (S-to-P) block 265, a size N Fast Fourier Transform (FFT) block 270, a Parallel-to-Serial (P-to-S) block 275, and a channel decoding and demodulation block 280.

[0054] In the transmission path 200, the channel coding and modulation block 205 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) block 210 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 block 215 performs IFFT operations on the N parallel symbol streams to generate a time domain output signal. The Parallel-to-Serial block 220 converts (such as multiplexes) parallel time domain output symbols from the Size N IFFT block 215 to generate a serial time domain signal. The cyclic prefix addition block 225 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 block 225 to an RF frequency for transmission via a wireless channel. The signal may also be filtered at a baseband before switching to the RF frequency.

[0055] 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 block 260 removes the cyclic prefix to generate a serial time domain baseband signal. The Serial-to-Parallel block 265 converts the time domain baseband signal into a parallel time domain signal. The Size N FFT block 270 performs an FFT algorithm to generate N parallel frequency domain signals. The Parallel-to-Serial block 275 converts the parallel frequency domain signal into a sequence of modulated data symbols. The channel decoding and demodulation block 280 demodulates and decodes the modulated symbols to recover the original input data stream.

[0056] 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.

[0057] Each of the components in FIGs. 2a and 2b may 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 block 270 and IFFT block 215 may be implemented as configurable software algorithms, in which the value of the size N may be modified according to the implementation.

[0058] 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 may 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.)

[0059] 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 may be combined, further subdivided or omitted, and additional components may be added according to specific requirements. Furthermore, FIGs. 2a and 2b are intended to illustrate examples of types of transmission and reception paths that may be used in a wireless network. Any other suitable architecture may be used to support wireless communication in a wireless network.

[0060] 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 may 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.

[0061] 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.

[0062] 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).

[0063] 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.

[0064] The controller / processor 307 may 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 may control the reception of forward channel signals and the transmission of backward channel signals through the RF transceiver 302, the RX processing circuit 305 and the TX processing circuit 303 according to well-known principles. In some embodiments, the controller / processor 307 includes at least one microprocessor microcontroller.

[0065] 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 may 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.

[0066] The controller / processor 307 is also coupled to the input device(s) 309 and the display 310. An operator of UE 116 may 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 may include a random access memory (RAM), while another part of the memory 311 may include a flash memory or other read-only memory (ROM).

[0067] Although FIG. 3a illustrates an example of UE 116, various changes may be made to FIG. 3a. For example, various components in FIG. 3a may be combined, further subdivided or omitted, and additional components may be added according to specific requirements. As a specific example, the controller / processor 307 may 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 may be configured to operate as other types of mobile or fixed devices.

[0068] 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 may 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 may include the same or similar structures as gNB 102.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] The controller / processor 378 may include one or more processors or other processing devices that control the overall operation of gNB 102. For example, the controller / processor 378 may 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 may also support additional functions, such as higher layer wireless communication functions. For example, the controller / processor 378 may perform a Blind Interference Sensing (BIS) process such as that performed through a BIS algorithm, and decode a received signal from which an interference signal is subtracted. A controller / processor 378 may support any of a variety of other functions in gNB 102. In some embodiments, the controller / processor 378 includes at least one microprocessor microcontroller.

[0073] 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 may 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 may move data into or out of the memory 380 as required by an execution process.

[0074] 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 may 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 may 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 may 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.

[0075] The memory 380 is coupled to the controller / processor 378. A part of the memory 380 may include an RAM, while another part of the memory 380 may 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.

[0076] 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.

[0077] Although FIG. 3b illustrates an example of gNB 102, various changes may be made to FIG. 3b. For example, gNB 102 may include any number of each component shown in FIG. 3a. As a specific example, the access point may include many backhaul or network interfaces 382, and the controller / processor 378 may 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 may include multiple instances of each (such as one for each RF transceiver).

[0078] Embodiments of the application are described in detail below with reference to the accompanying drawings.

[0079] In the disclosure, a numerology may refer to a set of parameters that define a basic time unit and frequency unit in the wireless communication system. These parameters may be used for determining the waveform, subcarrier spacing, and sampling rate of the signal. The numerology may include at least one of the followings: subcarrier spacing, cyclic prefix, symbol periodicity, sampling rate, slot length, frame structure. Optionally, the subcarrier spacing may be the frequency difference between two neighboring subcarriers, typically in Hertz (Hz). The subcarrier spacing decides the bandwidth and time resolution of the system. Optionally, the cyclic prefix is a cyclic prefix added at the beginning of an orthogonal frequency-division multiplexing (OFDM) symbol. The length of the cyclic prefix is associated with the subcarrier spacing: the addition of the cyclic prefix is to reduce the impact of multipath effects. Optionally, the symbol periodicity may be the duration of one OFDM symbol. Optionally, the symbol periodicity may be the reciprocal of the subcarrier spacing. Optionally, the sampling rate may be the sampling frequency at which signals are received and transmitted. Optionally, the sampling rate is associated with the subcarrier spacing. Optionally, the slot length may be a time period used for distinguishing uplink and downlink in a time division duplex (TDD) system. Optionally, the slot length is associated with the subcarrier spacing and the symbol periodicity. Optionally, the frame structure is used for defining the organization of slots within the frame, including the length of the frame and the number of slots. In 5G new radio (NR), multiple different numerology configurations may be supported to fit different frequency bands and application scenarios. For example, low frequency bands may use larger subcarrier spacing to support wider bandwidth and longer transmission distance, while high frequency bands may use smaller subcarrier spacing to support higher data rate and lower latency.

[0080] In the disclosure, a time domain resource may include / correspond to several time domain units.

[0081] 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.

[0082] In the disclosure, the term "A is before B" may be used interchangeably with the term "A is no later than B".

[0083] In the disclosure, the term "A is after B" may be used interchangeably with the term "A is no earlier than B".

[0084] In the disclosure, a frequency domain resource may include / correspond to several frequency domain units.

[0085] 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).

[0086] In the disclosure, a cell may be a serving cell or a non-serving cell. The cell may be at least one of a Primary Cell (PCell), a Primary Secondary Cell Group Cell (PSCell), a Secondary Cell, and a Special Cell. The Special Cell (SpCell) may be a PCell or a PSCell. In dual connectivity operation, the Special Cell refers to a Primary Cell of a Master Cell Group (MCG) or a Primary Secondary Cell of a Secondary Cell Group (SCG). Otherwise, the Special Cell refers to a Primary Cell. The Special Cell may be a current Special Cell.

[0087] In the disclosure, a cell may include one or more CCs. A cell may include one or more uplink CCs, and / or one or more downlink CCs.

[0088] In the disclosure, a cell may have a physical cell ID (PCI). Optionally, the UE may obtain the PCI of the cell by receiving a synchronization signal / physical broadcast channel block (SS / PBCH block, SSB). Optionally, the SSB is a cell-defining SSB. Optionally, the UE may obtain the PCI of the cell by indication from the base station. For example, the UE may obtain the PCI of the non-serving cell by indication from the base station. For example, the UE may obtain the PCI of the SSB of the non-serving cell by indication from the base station.

[0089] In the disclosure, an SSB may have PCI. The PCI of an SSB may be determined based on the reference signal in the SSB or based on indication from the base station. Optionally, the reference signal in the SSB may be a Primary Synchronization Signal (PSS) and / or a Secondary Synchronization Signal (SSS).

[0090] 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.

[0091] In the disclosure, transmit power of a signal may be represented by capability on each time-frequency unit, for example, Energy Per Resource Element (EPRE).

[0092] 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.

[0093] 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.

[0094] In the disclosure, the time domain resource and / or the frequency domain resource may be referred to as the physical resource.

[0095] In the disclosure, the UE may perform uplink transmission and / or downlink reception on the physical resource.

[0096] In the disclosure, the UE may receive the downlink channel and / or the downlink signal on the physical resource.

[0097] The channel received on the physical resource may be referred to as the downlink physical channel. The Signal received on the physical resource may be referred to as the downlink physical signal. The downlink channel includes the downlink control channel and / or the downlink data channel. The downlink control channel may be the physical downlink control channel (PDCCH). The downlink data channel may be the physical downlink shared channel (PDSCH).

[0098] The signal received on the physical resource may be referred to as the downlink physical signal. The downlink signal may include at least one of the followings: a reference signal for synchronization, a reference signal for demodulation, a reference signal for acquiring a channel state, a reference signal for phase tracking, a reference signal for mobility, a reference signal for positioning, a reference signal for channel measurement, a reference signal for interference measurement. Optionally, the reference signal for synchronization includes at least one of the followings: a primary synchronization signal, a secondary synchronization signal. Optionally, the reference signal for synchronization may include synchronization signal / physical broadcast channel block (SS / PBCH block, SSB).

[0099] In the disclosure, the reference signal for demodulation may be referred to as a demodulation reference signal (DM-RS). The reference signal for phase tracking may be referred to as a phase-tracking reference signal (PT-RS). The reference signal for positioning may be referred to as a positioning reference signal (PRS). The reference signal for acquiring the channel state may be referred to as a channel-state information reference signal (CSI-RS).

[0100] In the disclosure, the UE may transmit the uplink channel and / or the uplink signal on the physical resource.

[0101] The channel transmitted on the physical resource may be referred to as the uplink physical channel. The uplink channel includes at least one of the followings: an uplink control channel, an uplink data channel, and a random access channel. The uplink control channel may be the physical uplink control channel (PUCCH). The uplink data channel may be the physical uplink shared channel (PUSCH). The random access channel may be the physical random access channel (PRACH). In the disclosure, the term "PUCCH" may be used interchangeably with the term "uplink control channel" or "control channel for uplink transmission" or "control channel for uplink" or "channel for uplink control information". In the disclosure, the term "PUSCH" may be used interchangeably with the term "uplink data channel" or "data channel for uplink transmission" or "data channel for uplink".

[0102] The signal transmitted on the physical resource may be referred to as the uplink physical signal. The uplink signal may include at least one of the followings: a reference signal for demodulation, a reference signal for phase tracking, and a reference signal for sounding. The reference signal for sounding may be referred to as a sounding reference signal (SRS).

[0103] Optionally, the reference signal for demodulation may include at least one of the followings: a reference signal for data channel demodulation and a reference signal for control channel demodulation. Optionally, the reference signal for acquiring the channel state may include at least one of the followings: a reference signal for tracking, a reference signal for CSI acquisition, a reference signal for beam management. The reference signal for beam management includes at least one of the followings: a reference signal for acquiring Layer 1-Reference Signal Received Power (L1-RSRP), a reference signal for acquiring Layer 1-Signal to Interference plus Noise Ratio (L1-SINR). Acquiring L1-RSRP may be calculating L1-RSRP. Acquiring L1-SINR may be calculating L1-SINR.

[0104] In the disclosure, the UE may obtain downlink control information (DCI) via PDCCH.

[0105] In the disclosure, the term "downlink control information" may be used interchangeably with the term "DCI format" or "control information for downlink".

[0106] In the disclosure, the term "PDCCH" may be used interchangeably with the term "downlink control channel" or "control channel for downlink transmission" or "control channel for downlink".

[0107] In the disclosure, the term "PDCCH" may be used interchangeably with the term "PDCCH candidate".

[0108] In the disclosure, a PDCCH may be composed of one or more control channel elements (CCEs). Optionally, one or more CCEs associated with / corresponding to the PDCCH may be the one or more CCEs constituting the PDCCH. An aggregation level (AL) of the PDCCH may be L, where L may be 1, 2, 4, 8, 16. If the aggregation level of a PDCCH is L, the PDCCH is composed of L CCEs, or is associated with / corresponds to L CCEs. The term "aggregation level" and the term "CCE aggregation level" may be used interchangeably.

[0109] In the disclosure, the UE monitors the PDCCH in a search space associated with the control resource ret (CORESET). The PDCCH may be monitored from the search space associated with the control resource set.

[0110] In the disclosure, the term "control resource set" may be used interchangeably with the term "control resource" or "resource for receiving control information" or "resource for monitoring PDCCH" or "resource for detecting control information".

[0111] In the disclosure, the term "search space" may be used interchangeably with the term "PDCCH search space" or "PDCCH search space set" or "PDCCH candidate search space" or "PDCCH candidate search space set" or "search space for searching PDCCH" or "search space for searching PDCCH candidate" or "search space set for searching PDCCH" or "search space set for searching PDCCH candidate". Optionally, the search space may be a common search space (CSS) or a UE-specific search space (USS). Optionally, the search space may be used to detect DCI. Optionally, the search space may be used to detect DCI format.

[0112] In the disclosure, the term "PDCCH candidate associated with search space" may be used interchangeably with the term "PDCCH candidate in the search space".

[0113] In the disclosure, a modulation scheme associated with the PDCCH candidate may be the modulation scheme used by the corresponding PDCCH candidate. The aggregation level associated with the PDCCH candidate may be the aggregation level of the corresponding PDCCH candidate.

[0114] In the disclosure, the UE may monitor the PDCCH (or monitor the PDCCH candidate) in PDCCH monitoring occasion(s). Optionally, the PDCCH monitoring occasion may be one or more (consecutive) time domain units. Optionally, the PDCCH monitoring occasion may be an occasion for monitoring the PDCCH, or an occasion for monitoring the PDCCH candidate.

[0115] In the disclosure, monitoring the PDCCH candidate may be receiving the PDCCH candidate and / or decoding according to the monitored DCI format.

[0116] In the disclosure, detecting DCI includes receiving and / or decoding DCI.

[0117] In the disclosure, the DCI format may be at least one of the followings: DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 0_3, DCI format 1_0, DCI format 1_1, DCI format 1_2, and DCI format 1_3. In the disclosure, the type of the DCI format may be one of the followings: DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 0_3, DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 1_3.

[0118] In the disclosure, the PDCCH may carry DCI and / or cyclic redundancy check (CRC) corresponding to the DCI, or the DCI and / or the CRC corresponding to DCI may be in the PDCCH. Optionally, the CRC may be scrambled in a specific method. For example, optionally, the CRC may be scrambled based on a Radio Network Temporary Identifier (RNTI). Two PDCCHs having the same scrambling may be the two PDCCHs are scrambled by the same RNTI. Optionally, the RNTI may be one of a Cell-Radio Network Temporary Identifier (C-RNTI), a Configured Scheduling-Radio Network Temporary Identifier (CS-RNTI).

[0119] In the disclosure, the term "information bits of DCI" may be used interchangeably with the term "information bits associated with DCI" or "information bits included in DCI" or "information bits corresponding to DCI". Optionally, the information bits associated with the DCI may include the information bits of the DCI and the check bits (for example, CRC bits) corresponding to the DCI. Optionally, the information bits associated with the DCI may include the information bits of the DCI and bits for checking the DCI (for example, CRC bits).

[0120] 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.

[0121] In the disclosure, DCI may include one or more information fields.

[0122] In the disclosure, the term "size of information field" may be used interchangeably with the term "bitwidth of information field" or "number of information bits in information field".

[0123] In the disclosure, the existence of an information field may be that the size of the information field is greater than 0 bit. The absence of an information field may be that the size of the information field is equal to 0 bit.

[0124] 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.

[0125] In the disclosure, when the DCI schedules a channel or signal, a cell receiving or transmitting the channel or signal may be referred to as a scheduled cell. A cell where the DCI is detected or a cell where the DCI is monitored / received may be referred to as a scheduling cell.

[0126] In the disclosure, when the DCI schedules a channel or signal, a BWP receiving or transmitting the channel or signal may be referred to as a scheduled BWP. A BWP where the DCI is detected, or a BWP where the PDCCH associated with the DCI is monitored / received may be referred to as a scheduling BWP.

[0127] In the disclosure, the UE may obtain data via PDSCH. The UE may obtain downlink data by reception of the PDSCH.

[0128] In the disclosure, the term "PDSCH" may be used interchangeably with the term "downlink data channel" or "data channel for downlink transmission" or "downlink channel for receiving data" or "downlink channel for carrying data".

[0129] In the disclosure, the PDSCH may be scheduled / indicated by DCI. The PDSCH scheduled / indicated by DCI may be referred to as the dynamically scheduled PDSCH. For example, the PDSCH may be scheduled by DCI format.

[0130] In the disclosure, the PDSCH may be the PDSCH for semi-persistent scheduling (SPS). In the disclosure, the term "PDSCH for semi-persistent scheduling" may be used interchangeably with the term "SPS PDSCH" or "PDSCH without corresponding PDCCH" or "PDSCH scheduled without corresponding PDCCH" or "PDSCH with SPS". Here, the PDCCH may be PDCCH transmission. Optionally, the SPS PDSCH may be scheduled based on higher layer configuration information. Optionally, the higher layer configuration information may be used for configuring downlink semi-persistent transmission. The higher layer configuration information is, for example, SPS-Config. The information for configuring downlink semi-persistent transmission may be referred to as SPS configuration information. Optionally, the SPS PDSCH may be activated by DCI. Optionally, the DCI is scrambled by CS-RNTI or Group CS-RNTI (G-CS-RNTI).

[0131] In the disclosure, a reference signal associated with the downlink channel includes the reference signal for demodulation, and / or the reference signal for phase tracking. For example, the reference signal associated with the downlink channel includes the reference signal for demodulating the downlink channel, and / or the reference signal for phase tracking the downlink channel. The reference signal associated with the downlink channel may be referred to as the reference signal of the downlink channel.

[0132] In the disclosure, the downlink channel may include the downlink channel and the reference signal associated with the downlink channel.

[0133] In the disclosure, the UE may transmit uplink control information (UCI) via the uplink channel.

[0134] In the disclosure, the term "uplink control information (UCI)" may be used interchangeably with the term "control information for uplink".

[0135] In the disclosure, the UCI includes Hybrid Automatic Repeat Request (HARQ) information, information for scheduling request (SR), information for link recovery request (LRR), channel state information (CSI). The Hybrid Automatic Repeat Request information may be Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information. The information for scheduling request may be referred to as a scheduling request. The information for link recovery request may be referred to as a link recovery request.

[0136] In the disclosure, the UCI includes UCI information bits. In the disclosure, the information bits of UCI may be the information bits included in UCI, or the information bits associated with UCI, or payload of UCI.

[0137] In the disclosure, the term "UCI information bits" may be used interchangeably with the term "information bits associated with UCI" or "information bits included in UCI" or "information bits corresponding to DCI / UCI". The information bits associated with UCI may include information bits of the UCI and check bits (e.g., CRC bits) corresponding to the UCI. The information bits associated with UCI may include information bits of the UCI and bits used for checking the UCI (e.g., CRC bits).

[0138] In the disclosure, CSI information bits may be divided into one part or two parts. When the CSI information bits correspond to two parts, the two parts are CSI Part one and CSI Part two.

[0139] In the disclosure, the UE may transmit one or two PUCCHs within a time domain unit in a serving cell. The two PUCCHs are on different time domain resources. For example, the UE may transmit two PUCCHs on different symbols within a slot.

[0140] In the disclosure, the term "PUCCH" may be used interchangeably with the term "uplink control channel" or "channel for transmitting uplink control information" or "channel for carrying uplink control information".

[0141] In the disclosure, the UE may transmit data and / or UCI through PUSCH. The UCI being on the PUSCH may be referred to as the UCI being multiplexed; optionally, the UCI and data being transmitted together on the PUSCH may be referred to as the UCI being multiplexed.

[0142] In the disclosure, PUSCH may be used for carrying information bits. The information bits carried by the PUSCH may be referred to as information bits of the PUSCH. The information bits of the PUSCH include information bits of the TB and / or information bits of the UCI.

[0143] In the disclosure, the term "information bits of PUSCH" may be used interchangeably with the term "information bits associated with PUSCH" or "information bits carried by PUSCH". Optionally, the information bits carried by the PUSCH may include the information bits carried by the PUSCH and check bits (for example, CRC bits). Optionally, the information bits associated with the PUSCH may include the information bits of the PUSCH and bits used for checking the information carried by the PUSCH (for example, CRC bits).

[0144] In the disclosure, the reference signal associated with the uplink channel includes the reference signal for demodulation, and / or the reference signal for phase tracking. For example, the reference signal associated with the uplink channel includes the reference signal for demodulating the uplink channel, and / or the reference signal for phase tracking the uplink channel. The reference signal associated with the uplink channel may be referred to as the reference signal of the uplink channel.

[0145] In the disclosure, the uplink channel may include the uplink channel and the reference signal associated with the uplink channel.

[0146] In the disclosure, the UE may obtain indication information from the base station. Optionally, the indication information may include at least one of the followings: configuration information, activation command and deactivation command. The indication information from the base station may be carried / indicated via at least one of Radio Resource Control (RRC) information, Medium Access Control (MAC)-Control Element (CE) (MAC-CE), DCI. The RRC information may be referred to as configuration information. The configuration information may be indicated by a RRC parameter in the RRC information. The RRC parameter may be a RRC information element. MAC-CE related indication information may be indicated via a MAC-CE parameter in MAC-CE. The MAC-CE parameter may be a parameter for MAC-CE signaling indication / activation / deactivation.

[0147] In the disclosure, the UE may obtain one or more configurations via RRC information, and indicate / activate / deactivate a part of the one or more configurations via MAC-CE. The UE may operate according to the configuration indicated / activated by MAC-CE.

[0148] In the disclosure, the UE may obtain one or more configurations via RRC information, and indicate / activate / deactivate a part of configurations of the one or more configurations via MAC-CE. The UE may operate according to the configurations indicated / activated by MAC-CE. Optionally, the UE may determine one or more configurations of the part of the configurations (e.g., the part of the configurations indicated / activated by MAC-CE) based on indication of DCI. The UE may operate according to the configuration indicated by DCI.

[0149] In the disclosure, the RRC parameter and / or MAC-CE parameter may be referred to as the higher layer parameter.

[0150] In the disclosure, the UE obtaining the configuration information may be that the UE receiving / being configured with the configuration information. In the disclosure, "obtaining configuration information" may be used interchangeably with the term "receiving configuration information" or "being configured with configuration information".

[0151] In the disclosure, the UE may transmit indication information to the base station. The indication information transmitted to the base station may be carried / indicated via at least one of Radio Resource Control (RRC) information, Medium Access Control (MAC)-Control Element (CE) (MAC-CE), and UCI.

[0152] In the disclosure, the UE may transmit information for indicating / reporting UE capability to the base station. The UE capability includes UE radio access capability.

[0153] In the disclosure, the term "UE capability" may be used interchangeably with the term "UE feature" or "UE feature group" or "UE capability parameter" or "reported UE capability" or "UE capability signaling" or "reported UE capability parameter".

[0154] In the disclosure, the UE may receive / obtain CSI reporting configuration. The CSI reporting configuration may be indicated / configured by a higher layer parameter CSI-ReportConfig.

[0155] In the disclosure, the term "CSI" may be used interchangeably with the term "CSI parameter" or "CSI quantity".

[0156] In the disclosure, CSI may include at least one of the followings: CSI reference signal (CSI-RS) resource indicator (CRI), rank indicator (RI), precoding matrix indicator (PMI), channel quality indicator (CQI), layer indicator (LI), synchronization signal (SS) / physical broadcast channel (PBCH) block resource indicator (SSBRI), Layer 1-reference signal received power (L1-RSRP), Layer 1-single to interference noise ratio (L1-SINR), CapabilityIndex, time-domain channel properties (TDCP). The content included in the CSI may be indicated by the base station. For example, the content included in the CSI may be configured by a higher layer parameter (e.g., reportQuantity). For example, the higher layer parameter (e.g., reportQuantity) is indicated by the CSI reporting configuration.

[0157] In the disclosure, the time resource and / or frequency resource used by the UE to report the CSI may be controlled by the base station. The UE may report the CSI through the uplink channel / uplink signal. The UE may transmit the uplink channel associated with the CSI report. The CSI may be carried / indicated through the uplink channel / uplink signal. In the disclosure, the CSI report may be at least one of the followings: periodic, semi-persistent, aperiodic. In the disclosure, the CSI report may be at least one of the followings: periodic, semi-persistent on PUCCH (semiPersistentOnPUCCH), semi-persistent on PUSCH (semiPersistentOnPUSCH), aperiodic. Optionally, the time domain behavior of the CSI report may be at least one of the followings: periodic, semi-persistent, aperiodic. The periodic CSI report may be carried by PUCCH. The semi-persistent CSI report may be carried by PUCCH or PUSCH. The aperiodic CSI report may be carried by PUSCH. The time domain behavior of the CSI report may be indicated / configured by a higher layer parameter (e.g., reportConfigType). For example, the higher layer parameter (e.g., reportConfigType) is indicated by the CSI reporting configuration. The time domain behavior of the CSI report may be the time domain behavior of the CSI report corresponding to the CSI reporting configuration. When reportConfigType is set to 'aperiodic', the corresponding CSI report is aperiodic CSI report. When reportConfigType is set to 'semiPersistentOnPUCCH', the corresponding CSI report is semi-persistent CSI report carried by PUCCH. When reportConfigType is set to 'semiPersistentOnPUSCH', the corresponding CSI report is semi-persistent CSI report carried by PUSCH. When reportConfigType is set to 'periodic', the corresponding CSI report is periodic CSI report.

[0158] In the disclosure, the periodic CSI report may be triggered / indicated by RRC signaling. For example, when the UE receives the CSI reporting configuration triggering / indicating periodic CSI report and the configuration information is applied (or after the configuration information is applied), the UE performs corresponding CSI report. In the disclosure, the semi-persistent CSI report may be triggered / indicated by MAC-CE or DCI. For example, the semi-persistent CSI report transmitted on PUCCH is triggered / indicated by MAC-CE. For example, the semi-persistent CSI report transmitted on PUSCH is triggered / indicated by DCI. In the disclosure, the aperiodic CSI report may be triggered / indicated by DCI. For example, when the UE receives DCI triggering / indicating the CSI report, the UE transmits the corresponding CSI report.

[0159] In the disclosure, the term "uplink channel associated with CSI report" may be used interchangeably with the term "uplink channel corresponding to CSI report" or "uplink channel carrying CSI report".

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

[0161] In the disclosure, the generation and / or reporting of the CSI is based on the CSI reporting configuration. For example, the UE receives the CSI reporting configuration from the base station and generates and / or reports the CSI based on the CSI reporting configuration.

[0162] In the disclosure, the term "CSI reporting configuration" may be used interchangeably with the term "CSI reporting configuration information" or "information for CSI reporting configuration" or "information for configuring CSI reporting" or "CSI reporting setting".

[0163] In the disclosure, a CSI reporting band may be indicated by the CSI reporting configuration. Frequency domain granularity associated with / corresponding to the CSI may be wideband and / or subband. For example, PMI / CQI report may be wideband and / or subband.

[0164] In the disclosure, PMI (or, the value of PMI) may correspond to a codebook (or, a codebook index). The codebook corresponding to the PMI may be indicated by the base station. For example, the codebook corresponding to the PMI is indicated by a parameter (e.g., CodebookConfig) in the CSI reporting configuration. In the disclosure, the term "codebook" may be used interchangeably with the term "CSI codebook" or "codebook configuration parameter" or "codebook configuration information" or "information for configuring the codebook". Optionally, the codebook may be at least one of the followings: Type I codebook, Type II codebook, Enhanced Type II codebook, Further Enhanced Type II Port Selection, Enhanced Type II for coherent joint transmission (CJT), Further Enhanced Type II Port Selection for CJT, Enhanced Type II for predicted PMI, Further Enhanced Type II Port Selection for predicted PMI. The configuration information related to the codebook may include / indicate a codebook subset restriction.

[0165] In the disclosure, the UE may calculate CSI parameters based on the assumption on dependencies between CSI parameters. The assumption of correlation between CSI parameters includes at least one of the followings: LI is calculated conditioned on the reported CQI, PMI, RI and CRI; CQI is calculated conditioned on the reported PMI, RI and CRI; PMI is calculated conditioned on the reported RI and CRI; RI is calculated conditioned on the reported CRI.

[0166] In the disclosure, the UE may obtain / determine / generate the CSI through measurement of the CSI resource. In the disclosure, the time resource and / or frequency resource of the CSI resource may be controlled by the base station. The CSI resource may include the reference signal and / or the downlink channel. The CSI resource may be configured by CSI resource configuration. The CSI resource configuration may indicate one or more CSI resource sets. Optionally, each CSI resource set may include / indicate one or more reference signals. Optionally, the CSI reporting configuration may be associated with one or more CSI resource configurations. For example, the UE may obtain / determine / generate the CSI corresponding to a CSI reporting configuration by measuring the CSI resource corresponding to the CSI resource configuration associated with the CSI reporting configuration.

[0167] In the disclosure, the term "CSI resource configuration" may be used interchangeably with the term "CSI resource configuration information" or "information for CSI resource configuration" or "information for configuring CSI resource" or "CSI resource setting".

[0168] In the disclosure, the UE may determine the measurement for calculating the CSI based on the CSI resource (or, occasion of the CSI resource). For example, the UE may determine channel measurement and / or interference measurement for calculating the CSI based on the CSI resource (or the occasion of the CSI resource). For example, the UE may determine channel measurement for calculating the CSI based on the CSI resource (or the occasion of the CSI resource) for channel measurement. For example, the UE may determine interference measurement for calculating the CSI based on the CSI resource (or the occasion of the CSI resource) for interference measurement.

[0169] In the disclosure, the term "transmission occasion of CSI resource" may be used interchangeably with the term "occasion of CSI resource" or "reception occasion of CSI resource" or "transmission occasion of CSI resource".

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

[0171] In the disclosure, "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 the measurement resource, or obtaining the measurement for determining the CSI.

[0172] 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 the measurement resource, or obtaining the channel measurement for determining the CSI.

[0173] 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 the measurement resource, or obtaining the interference measurement for determining the CSI.

[0174] In the disclosure, the measurement of the CSI resource may or may not be performed with measurement restriction. The measurement restriction may be a time domain measurement restriction. The time domain measurement restriction includes the time domain restriction for channel measurement and / or the time domain restriction for interference measurement. The measurement restriction may be enabled or disabled by the CSI reporting configuration. For example, a parameter (e.g., timeRestrictionForChannelMeasurement) in the CSI reporting configuration may be used to enable the time domain restriction for channel measurement. For example, a parameter (e.g., timeRestrictionForInterferenceMeasurement) in the CSI reporting configuration may be used to enable the time domain restriction for interference measurement.

[0175] In the disclosure, the term "reference signal" may be used interchangeably with the term "reference signal resource".

[0176] In the disclosure, the reference signal may include at least one of the followings: the reference signal for synchronization, the reference signal for demodulation, the reference signal for acquiring channel states, the reference signal for phase tracking, the reference signal for mobility, the reference signal for positioning, the reference signal for channel measurement, the reference signal for interference measurement, the reference signal for sounding. Optionally, the reference signal for synchronization includes at least one of the followings: the primary synchronization signal, the secondary synchronization signal. Optionally, the reference signal for synchronization may include the synchronization signal / physical broadcast channel block. Optionally, the reference signal for demodulation may include at least one of the followings: the reference signal for data channel demodulation, the reference signal for control channel demodulation. Optionally, the data channel may include at least one of the followings: the physical downlink shared channel and the physical uplink shared channel. Optionally, the control channel may include at least one of the followings: the physical downlink control channel and the physical uplink control channel. Optionally, the reference signal for acquiring channel state may include at least one of the followings: the reference signal for tracking, the reference signal for CSI acquisition, and the reference signal for beam management. Optionally, the reference signal for beam management includes at least one of the followings: the reference signal for acquiring L1-RSRP, the reference signal for acquiring L1-SINR. Optionally, acquiring L1-RSRP may be calculating L1-RSRP. Optionally, acquiring L1-SINR may be calculating L1-SINR.

[0177] In the disclosure, a type of the reference signal (or the type of the CSI-RS) includes a reference signal for tracking, a reference signal for beam management, a reference signal for CSI acquisition.

[0178] Optionally, the reference signal for tracking may be a reference signal with a tracking reference signal information parameter (e.g., trs-Info). Optionally, with the tracking reference signal information parameter means that the configuration information for configuring the resource set of the reference signal is configured with the tracking reference signal information parameter. Optionally, the tracking reference signal information parameter indicates that the antenna port for all resources in the resource set is same. Optionally, the resources in the resource set are NZP CSI-RS resources. Optionally, all resources in the resource set are NZP CSI-RS resources.

[0179] Optionally, the reference signal for beam management may be a reference signal with a repetition parameter (e.g. repetition). Optionally, with the repetition parameter means that the configuration information for configuring the resource set of the reference signal is configured with the repetition parameter. Optionally, the repetition parameter is used for indicating whether repetition is on / off. If the UE is configured with a non-zero power CSI-RS resource set (for example, a resource set configured by the NZP-CSI-RS-ResourceSet parameter), and repetition is set to 'on', the UE may assume that the resources within the resource set are transmitted with the same downlink spatial domain transmission filter, where the resources in the resource set are transmitted in different OFDM symbols. If repetition is set to 'off', the UE does not assume that the resources within the resource set are transmitted with the same downlink spatial domain transmission filter. Optionally, the resources in the resource set are NZP CSI-RS resources.

[0180] Optionally, the reference signal for CSI acquisition may be a reference signal without the tracking reference signal information parameter and without the repetition parameter.

[0181] In the disclosure, the term "beam" may include at least one of the followings: "quasi co-location (QCL) parameter", "transmission configuration indication (TCI) state", "spatial domain filter", "antenna port", "transmission and reception point (TRP)", "reference signal", "beam information", "beam index". Optionally, a beam and another beam being the same may be a beam and another beam being quasi co-located.

[0182] In the disclosure, an antenna port may be defined such that the channel over which a symbol on the antenna port is conveyed may be inferred from the channel over which another symbol on the same antenna port is conveyed.

[0183] 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 may 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.

[0184] In the disclosure, the term "QCL parameter" may be used interchangeably with the terms "QCL information", "QCL assumption", "QCL configuration", "QCL configuration and / or QCL type". Optionally, the QCL parameter may include / represent at least one of the followings: Doppler shift, Doppler spread, average delay, delay spread, spatial reception parameter. The spatial reception parameter may be a parameter for spatial reception. Optionally, the QCL parameter may include a combination of different types of parameters. For example, the QCL parameter may include Doppler shift, Doppler spread, average delay and delay spread, and such QCL parameter may be referred to as QCL parameter type A. For example, the QCL parameter may include Doppler shift and Doppler spread, and such QCL parameter may be referred to as QCL parameter type B. For example, the QCL parameter may include Doppler shift and average delay, and such QCL parameter may be referred to as QCL parameter type C. For example, the QCL parameter may include spatial reception parameter, and such QCL parameter may be referred to as QCL parameter type D. For example, two antenna ports are said to be quasi co-located if the large-scale properties of the channel over which a symbol on one antenna port is conveyed may 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 may be inferred from the channel over which a symbol on the other antenna port is conveyed.

[0185] In the disclosure, the term "spatial domain filter" may be used interchangeably with the term "spatial filter" or "uplink transmission spatial domain filter" or "spatial domain filter for uplink transmission" or "spatial domain filter for downlink reception".

[0186] In the disclosure, the term "TCI state" may be used interchangeably with the term "TCI state configuration" or "TCI state configuration information" or "information for configuring the TCI state" or "information for indicating the TCI state". Optionally, the TCI state may be a unified TCI state. Optionally, the TCI state may be at least one of an uplink TCI state (UL TCI state), a downlink TCI state (DL TCI state), a joint TCI state. Optionally, the unified TCI state may be an uplink TCI state (UL TCI state) and a downlink TCI state (DL TCI state), or a joint TCI state.

[0187] In the disclosure, a TCI state may include parameters configuring quasi co-location relation, these parameters configure the relation between the reference signal (e.g., one or two reference signals, or one or two downlink reference signals) and at least one of the followings: a demodulation reference signal (DM-RS) port of the PDSCH, a DM-RS port of the PDCCH, a CSI-RS port of a CSI-RS resource. Optionally, a quasi co-location relation is configured by a higher layer parameter (e.g., qcl-Type1) for the first downlink reference signal. Optionally, a quasi co-location relation is configured by a higher layer parameter (e.g., qcl-Type2) for the second downlink reference signal. In case of two downlink reference signals, the QCL types are not the same, regardless of whether the references are to the same DL RS or different DL RSs.

[0188] In the disclosure, the TCI state may be used for providing a reference signal for the quasi co-location for DM-RS of PDSCH and DM-RS of PDCCH in a BWP / CC, for CSI-RS, and used to provide a reference, if applicable, for determining UL TX spatial filter. Optionally, the UL TX spatial filter may be for dynamic-grant and configured-grant based PUSCH and PUCCH resource, and SRS.

[0189] In the disclosure, the UE may obtain the indicated TCI state for reception of the downlink channel / downlink signals, and / or for transmission of the uplink channel / uplink signal. The indicated TCI state may be obtained by the following method.

[0190] The UE may receive / apply the indication of the TCI state. For example, the indication of the TCI state may be from the base station. Optionally, the UE may obtain the indicated TCI state by receiving the indication of the TCI state. The TCI state may be indicated via at least one of the following signaling: RRC, MAC-CE, DCI. Optionally, the indicated TCI state may be obtained via at least one of the followings: RRC, MAC-CE, DCI. Optionally, the UE may obtain configured TCI states by reception of RRC signaling related to the TCI state. Optionally, the UE may obtain activated TCI states by reception of MAC-CE signaling. Optionally, the activated TCI states are from the configured TCI states, or the activated TCI states are at least one of the configured TCI states, or the activated TCI states are a subset of the configured TCI states. Optionally, the UE may obtain the indicated TCI state by reception of DCI. Optionally, the indicated TCI state is from the activated TCI states, or the indicated TCI state is at least one of the activated TCI states.

[0191] Optionally, the UE may receive RRC, where the RRC may indicate / include configuration information for configuring the TCI state. Optionally, the UE may receive the configuration information for configuring the TCI state. For example, the configuration information for configuring the TCI state is dl-OrJointTCI-StateList. Optionally, the configuration information for configuring the TCI state may be in the higher layer parameter (e.g., PDSCH-Config) for configuring the UE-specific PDSCH parameter. Optionally, the configuration information for configuring the TCI state indicates / configures M TCI states. Optionally, M 1 and / or M≤128. When M = 1, the indicated TCI state refers to the TCI state configured by the higher layer parameter related to the TCI state. Optionally, the UE applies the indicated TCI after receiving the configuration information for configuring the TCI state.

[0192] Optionally, the UE may receive PDCCH configuration information for configuring the PDCCH. Optionally, the PDCCH configuration information may be used for monitoring DCI, where the DCI may include a field for indicating the TCI state. This field may be referred to as the TCI field. The size of the TCI field may be predefined or indicated by the base station. For example, the size of the TCI field is 1 bit, 2 bits, or 3 bits. The TCI field may correspond to several codepoints, which may be referred to as TCI codepoints. Optionally, the indicated TCI state may be indicated by the TCI field. For example, the UE may obtain the codepoint corresponding to the value of the TCI field in the DCI by detecting the DCI. The UE may determine the indicated TCI state according to the TCI state corresponding to the codepoint.

[0193] The mapping relation between the TCI codepoints and one or more configured TCI states (for example, M TCI states) may be indicated by MAC-CE. Optionally, the UE may receive the MAC-CE from the base station. Optionally, the MAC-CE may activate / indicate one or more TCI states, or the MAC-CE may activate / indicate one or more pairs of TCI states. Optionally, the MAC-CE may be used for mapping one or more TCI codepoints to the TCI states. The TCI state indicated / activated by the MAC-CE may be referred to as the activated TCI state. Optionally, the activated TCI state is at least one of the configured M TCI states. If the MAC-CE only maps the TCI state to one TCI codepoint, the UE applies the TCI state corresponding to the codepoint. If the MAC-CE only maps the TCI state to one TCI codepoint, the TCI state corresponding to the codepoint is the indicated TCI state.

[0194] Optionally, one codepoint may be mapped with one TCI state. For example, one codepoint may be mapped with one joint TCI state. Optionally, the joint TCI state may be theDL TCI state for DL channel / signal and the UL TCI state for UL channel / signal. Optionally, one codepoint may be mapped with a TCI state pair. A TCI state pair may include a downlink TCI state and an uplink TCI state. Optionally, the DL TCI state is for DL channel / signal. Optionally, the UL TCI state is for UL channel / signal.

[0195] The UE may obtain the indicated TCI state by the above method. The UE may obtain an indicated TCI state. The UE may use / apply the indicated TCI state to receive downlink channels / downlink signals and / or transmit uplink channels / uplink signals. The UE may use / apply an indicated first TCI state and / or an indicated second TCI state to receive downlink channels / downlink signals, and / or transmit uplink channels / uplink signals.

[0196] In the disclosure, the UE applies the indicated TCI state carried by the DCI when at least one of the following conditions is satisfied: 1) the UE is configured with the dl-OrJointTCI-StateList parameter; 2) the UE would transmit HARQ-ACK information corresponding to the DCI; optionally, the HARQ-ACK information is HARQ-ACK; optionally, the HARQ-ACK information is carried by PUSCH or PUCCH; optionally, the DCI is without DL assignment, or the DCI schedules one or more PDSCHs; 3) the indicated TCI state is different from the previously indicated TCI state. Optionally, the indicated TCI state is applied after the DCI. Optionally, the indicated TCI state is applied starting from the first slot that is at least beamAppTime symbols after the last symbol of the UL channel carrying the HARQ-ACK information. Here, beamAppTime is a parameter defining the minimum delay, in symbols, from the end of PUCCH or PUSCH transmission to the application of the new TCI state. The parameter ensures that there is sufficient time to process and prepare the new transmission before applying the new TCI state. Optionally, beamAppTime may be predefined or indicated by the base station. The value of beamAppTime may be one of 1, 2, 3, 4, 14, 28, 42, 56, 70, 84, 98, 112, 224, 336.

[0197] In the disclosure, the indicated TCI state may be applied to a serving cell or a plurality of serving cells. The indicated TCI state may be applied to one or more BWPs in a serving cell.

[0198] In the disclosure, the activated TCI state may be applied to a serving cell or a plurality of serving cells. The activated TCI state may be applied to one or more BWPs in a serving cell.

[0199] 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 channel state information (CSI) reporting configuration; at 402, the UE transmits a first uplink channel, wherein the first uplink channel is triggered based on the CSI reporting configuration; and at 403, the UE transmits a second uplink channel associated with the first uplink channel, wherein the second uplink channel carries a differential L1-RSRP corresponding to a reference signal resource associated with an indicated transmission configuration indication (TCI) state, wherein the differential L1-RSRP is determined based on a first threshold, and the first threshold is predefined or indicated by the CSI reporting configuration.

[0200] In some cases, the UE may receive / be configured with the CSI reporting configuration. Optionally, the CSI reporting configuration is for UE initiated CSI report. In the disclosure, the CSI reporting configuration may be the CSI reporting configuration for UE initiated CSI report. In the disclosure, the UE initiated CSI report may be considered as event-driven CSI report. In the disclosure, the UE initiated CSI report may be UE initiated beam reporting, or UE initiated L1-RSRP / L1-SINR report.

[0201] 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.

[0202] 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.

[0203] The UE needs to measure the reference signal in order to initiate / determine / report the CSI. The reference signal resource for measurement is discussed below. Optionally, the UE may obtain the reference signal resource for measurement. Optionally, the UE may obtain the reference signal resource for measurement by the CSI reporting configuration. Optionally, the measurement may be a channel measurement and / or an interference measurement. The reference signal resource for measurement may be the reference signal resource for link quality assessment. Optionally, the reference signal resource for measurement includes the reference signal resource associated with the CSI reporting configuration, and / or the reference signal resource associated with the indicated TCI state, and / or the reference signal resource associated with the activated TCI state.

[0204] The reference signal resource associated with the CSI reporting configuration is discussed below.

[0205] 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 / configure / be associated with / correspond to K resources, K 1. Optionally, the CSI reporting configuration may indicate / configure / be associated with / correspond to a resource set, where the resource set includes K resources, K 1. Optionally, the resource set may be configured by the newBeamResourceSetEvent2-r19 parameter in the CSI reporting configuration. The parameter may be used for configuring the resource set. Optionally, the serving cell where the resources in the resource set are located may be indicated by the base station or predefined. For example, the serving cell where the resources in the resource set are located is configured by the carrier parameter in the CSI reporting configuration. The parameter may be used for indicating the serving cell where the resource set is located. If the carrier parameter is not configured in the CSI reporting configuration, the serving cell where the resources in the resource set are located is the serving cell where the CSI reporting configuration is located. Optionally, the resource set may be a new beam resource set. Optionally, the resource set may be used for configuring the new beam. Optionally, the resource set may be for measurement and / or for link quality assessment. Optionally, the measurement may be channel measurement and / or interference measurement. Optionally, the reference signals in the resource set are of the same type. Optionally, the type of the reference signal includes SSB, CSI-RS. Optionally, the type of the CSI-RS includes the reference signal for tracking, the reference signal for beam management, and the reference signal for CSI acquisition. Optionally, when the reference signal resource is the CSI-RS resource, the resource associated with the CSI reporting configuration may be periodic / semi-persistent. Optionally, the BWP associated with the resource set is indicated by the base station or predefined. For example, the BWP associated with the resource set may be indicated by a BWP ID parameter in the information for configuring the resource set (e.g., CSI-ResourceConfig). Optionally, the BWP associated with the resource set may be the BWP where the resources in the resource set are located. The predefined BWP may be an active BWP, or an initial BWP, or a default BWP, or a BWP with the smallest ID, or a BWP with the largest ID. Optionally, the BWP of each resource in the resource set may be indicated separately. Optionally, the BWP of each resource in the resource set may be indicated with an associated BWP ID.

[0206] The reference signal resource associated with the indicated TCI state is discussed below. Refer above for the determination of the indicated TCI state.

[0207] 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: Method#1) an SSB quasi-co-located with the QCL reference signal of the indicated TCI state; Method#2) the QCL reference signal of the indicated TCI state. Optionally, a TCI state may be associated with / include / correspond to one or two QCL reference signals. Optionally, if a TCI state is associated with / includes / corresponds to two QCL reference signals, the reference signal associated with the TCI state is the QCL type D reference signal of the two QCL reference signals.

[0208] Optionally, the reference signal resource associated with the indicated TCI state may be determined based on Method#1 or Method#2. Optionally, Method#1 or Method#2 may be indicated by the base station. For example, the parameter included in the CSI reporting configuration indicates Method#1 or Method#2. Optionally, the reference signal resource associated with the indicated TCI state may be determined based on the reference signal resource associated with the CSI reporting configuration. Optionally, the reference signal resource associated with the indicated TCI state may be determined based on the type of the reference signal resource associated with the CSI reporting configuration. Optionally, if the resources in the resource set are SSB resources, the reference signal associated with the indicated TCI state is determined by Method#1. If the resources in the resource set are CSI-RS resources (e.g., the reference signal resource with the repetition parameter), the reference signal associated with the indicated TCI state is determined based on Method#2.

[0209] Optionally, the type of the reference signal associated with the indicated TCI state is the same as the type of the reference resource included in the resource set.

[0210] Optionally, the reference signal associated with the indicated TCI state and the reference resource included in the resource set may be the SSB. Optionally, in the case where the reference signal associated with the indicated TCI state and / or the reference signal in the resource set are the SSB, the PCI of the SSB associated with the indicated TCI state is the same as the PCI of the SSB in the resource set. This allows the UE to compare the measurement for SSBs from the same physical cell in order for the UE to initiate the CSI report for that physical cell.

[0211] In some cases, the UE may be configured with one or more serving cells / BWPs, with different indicated TCI states on different serving cells / BWPs. It needs to be clarified which indicated TCI state is used for detection of the event. The following method may prevent the UE from initiating CSI using the erroneous indicated TCI state, improving the reliability of the communication system. Optionally, the indicated TCI state is the indicated TCI state associated with a first serving cell, or the indicated TCI state is the indicated TCI state associated with a first BWP in the first serving cell. For example, the indicated TCI state for initiating CSI (or for reporting CSI, or for event determination, or associated with event) may be the indicated TCI state associated with the first serving cell, or the indicated TCI state associated with the first BWP in the first serving cell. Optionally, the first serving cell is indicated by the base station, or the first serving cell is predefined. For example, the first serving cell is indicated by the parameter (e.g., carrier) in the CSI reporting configuration. For example, when the CSI reporting configuration includes the parameter (e.g., carrier), the first serving cell is indicated by the parameter. For example, when the CSI reporting configuration does not include the parameter (e.g., carrier), the first serving cell is the serving cell where the CSI reporting configuration is located. For example, the first serving cell is the serving cell where the resources in the resource set are located. Refer above for the method of determining the serving cell where the resources in the resource set are located. Optionally, the first BWP may be indicated by the base station, or the first BWP may be a predefined BWP. For example, the first BWP is indicated by the parameter in the CSI reporting configuration. For example, when the CSI reporting configuration includes the parameter, the first BWP is indicated by the parameter. For example, when the CSI reporting configuration does not include the parameter, the first BWP is the predefined BWP. Optionally, the parameter for indicating the first BWP is the same as or different from the parameter for indicating the first serving cell. Optionally, the first BWP may be the BWP associated with the resource set. Optionally, the first BWP and the BWP associated with the resource set may be indicated by the same parameter. For example, the ID of the first serving cell and the ID of the first BWP may be indicated by the parameter ServingCellAndBWP-Id. The parameter may be used for indicating the serving cell ID and the BWP ID. Here, the BWP may be a downlink BWP. The predefined BWP may be an active BWP, or an initial BWP, or a default BWP, or a BWP with the smallest ID, or a BWP with the largest ID.

[0212] In the disclosure, the indicated TCI state associated with the first serving cell refers to the indicated TCI state applied / used on the first serving cell. In the disclosure, the indicated TCI state associated with the first BWP refers to the indicated TCI state applied / used on the first BWP.

[0213] Optionally, the indicated TCI state refers to the latest indicated TCI state before the first uplink channel. Optionally, the indicated TCI state refers to the latest indicated TCI state before the reference resource associated with the first uplink channel. Optionally, the indicated TCI state refers to the latest indicated TCI state before a second uplink channel. Optionally, the indicated TCI state refers to the latest indicated TCI state before the CSI reference resource corresponding to the CSI report carried by the second uplink channel. Since the indicated TCI states may be time-varying, this method may clarify which indicated TCI state may be used for initiation of CSI or for determination of the event, preventing the UE from using the erroneous indicated TCI state to trigger the CSI or determine the event and improving the reliability of the UE.

[0214] In some cases, the UE may obtain a plurality of the indicated TCI states. For example, the UE may obtain the plurality of the indicated TCI states by DCI detection or reception of MAC-CE. Here, the number of the plurality of the indicated TCI states may be one of 2, 3 and 4. For example, the plurality of the indicated TCI states may be two TCI states. Optionally, the plurality of TCI states are applicable to different TRPs. Optionally, each indicated TCI state of the plurality of the indicated TCI states may be applied to the reception of downlink channels / downlink signals, and / or to the transmission of uplink channels / uplink signals. Optionally, the plurality of TCI states may be used / applied to one or more serving cells. Optionally, the plurality of TCI states may be used / applied to one or more BWPs in the serving cell. Optionally, the plurality of the indicated TCI states are applicable to the same serving cell. Optionally, the plurality of the indicated TCI states are applicable to the same BWP. Optionally, the plurality of the indicated TCI states are applicable to the same BWP in the same serving cell.

[0215] Refer above for the method of determining the serving cell associated with the plurality of the indicated TCI states. Refer above for the method of determining the BWP in the serving cell associated with the plurality of the indicated TCI states.

[0216] Optionally, the CSI reporting configuration is associated with a specific indicated TCI state of the plurality of TCI states. Optionally, the specific indicated TCI state of the plurality of TCI states may be used for determination of the event associated with the CSI reporting configuration. Optionally, the specific indicated TCI state of the plurality of TCI states may be used for triggering the first uplink channel. Optionally, the specific indicated TCI state of the plurality of TCI states may be used for determining the CSI carried by the second uplink channel. Optionally, the specific indicated TCI state may be predefined or indicated via the base station. Optionally, the specific indicated TCI state may be predefined or indicated by the base station. For example, the specific indicated TCI state may be the first TCI state (or the last TCI state) of the plurality of TCI states. For example, the specific indicated TCI state is the first Y TCI states (or the last Y TCI states) of the plurality of TCI states. Here, Y 1. Optionally, Y is predefined or indicated by the base station. The value of Y may be one of 1, 2, 3, and 4. For example, the specific indicated TCI state may be indicated by the parameter in the CSI reporting configuration. The parameter is used for indicating the specific indicated TCI state. For example, in the case where the plurality of the indicated TCI states are two indicated TCI states, the parameter corresponds to 1 bit. A first value of the parameter (e.g., 0) corresponds to the first one of the two indicated TCI states. A second value of the parameter (e.g., 1) corresponds to the second one of the two indicated TCI states.

[0217] This method may clarify which TCI state corresponding to the TRP may be used for initiation of CSI or for determination of the event, preventing the UE from using the erroneous indicated TCI state to trigger the CSI or determine the event, improving the reliability of the UE.

[0218] The reference signal resource associated with the activated TCI state is discussed below. Refer above for the determination method for the activated TCI state.

[0219] Optionally, the reference signal associated with the activated TCI state may be the reference signal corresponding to the activated TCI state. Optionally, the reference signal associated with the activated TCI state may be at least one of the followings: Method#3) the SSB quasi-co-located with the QCL reference signal of the activated TCI state; Method#4) the QCL reference signal of the activated TCI state. Optionally, a TCI state may be associated with / include / correspond to one or two QCL reference signals. Optionally, if a TCI state is associated with / includes / corresponds to two QCL reference signals, the reference signal associated with the TCI state is the QCL type D reference signal of the two QCL reference signals.

[0220] Optionally, the reference signal resource associated with the activated TCI state may be determined based on Method#3 or Method#4. Optionally, Method#3 or Method#4 may be indicated by the base station. For example, the parameter included in the CSI reporting configuration indicate Method#3 or Method#4. Optionally, the reference signal resource associated with the activated TCI state may be determined based on the reference signal resource associated with the CSI reporting configuration. Optionally, the reference signal resource associated with the activated TCI state may be determined based on the type of the reference signal resource associated with the CSI reporting configuration. Optionally, if the resources in the resource set are SSB resources, the reference signal associated with the activated TCI state is determined by Method#3. If the resources in the resource set are CSI-RS resources (for example, the reference signal resource with the repetition parameter), the reference signal associated with the activated TCI state is determined based on Method#4.

[0221] Optionally, the types of the reference signals associated with the activated TCI states are the same. For example, the types of the reference signals associated with one or more TCI states activated by MAC-CE signaling are the same. Optionally, the type of the reference signal associated with the activated TCI state is the same as the type of the reference resource included in the resource set.

[0222] Optionally, the reference signal associated with the activated TCI state and the reference resource included in the resource set may be the SSB. Optionally, in the case where the reference signal associated with the activated TCI state and / or the reference signal in the resource set are the SSB, the PCI of the SSB associated with the activated TCI state is the same as the PCI of the SSB in the resource set. This allows the UE to compare the measurement for SSBs from the same physical cell in order for the UE to initiate CSI report for that physical cell.

[0223] In some cases, the UE may be configured with one or more serving cells, with different activated TCI states on different serving cells. It needs to be clarified which activated TCI state is used for detection of the event. The following method may prevent the UE from using the erroneous activated TCI state to initiate CSI, improving the reliability of the communication system. Optionally, the activated TCI state is the activated TCI state associated with a second serving cell, or the activated TCI state is the activated TCI state associated with a second BWP in the second serving cell. For example, the activated TCI state for initiating CSI (or for reporting CSI, or for event determination, or associated with event) may be the activated TCI state associated with the second serving cell, or the activated TCI state associated with the second BWP in the second serving cell. Optionally, the second serving cell is indicated by the base station, or the second serving cell is predefined. For example, the second serving cell is indicated by the parameter (e.g., carrier) in the CSI reporting configuration. For example, when the CSI reporting configuration includes the parameter (e.g., carrier), the second serving cell is indicated by the parameter. For example, when the CSI reporting configuration does not include the parameter (e.g., carrier), the second serving cell is the serving cell where the CSI reporting configuration is located. For example, the second serving cell is the serving cell where the resources in the resource set are located. Refer above for the method of determining the serving cell where the resources in the resource set are located. Optionally, the second BWP may be indicated by the base station, or the second BWP may be a predefined BWP. For example, the second BWP is indicated by the parameter in the CSI reporting configuration. For example, when the CSI reporting configuration includes the parameter, the second BWP is indicated by the parameter. For example, when the CSI reporting configuration does not include the parameter, the second BWP is the predefined BWP. Optionally, the second BWP may be the BWP associated with the resource set. Optionally, the second BWP and the BWP associated with the resource set may be indicated by the same parameter. Optionally, the parameter for indicating the second BWP is the same as or different from the parameter for indicating the second serving cell. For example, the ID of the second serving cell and the ID of the second BWP may be indicated by the parameter ServingCellAndBWP-Id. The parameter may be used for indicating the serving cell ID and the BWP ID. Here, the BWP may be a downlink BWP. The predefined BWP may be an active BWP, or an initial BWP, or a default BWP, or a BWP with the smallest ID, or a BWP with the largest ID.

[0224] In the disclosure, the activated TCI state associated with the second serving cell refers to the activated TCI state on the second serving cell, or the activated TCI state applied / used on the second serving cell. In the disclosure, the activated TCI state associated with the second BWP refers to the activated TCI state on the second BWP, or the activated TCI state applied / used on the second BWP.

[0225] Optionally, the activated TCI state refers to the latest activated TCI state before the first uplink channel. For example, at least one activated TCI state (or each activated TCI state) of the A activated TCI states is the latest activated TCI state before the first uplink channel. Optionally, the activated TCI state refers to the latest activated TCI state before the reference resource associated with the first uplink channel. For example, at least one activated TCI state (or each activated TCI state) of the A activated TCI states is the latest activated TCI state before the reference resource associated with the first uplink channel. Optionally, the activated TCI state refers to the latest activated TCI state before the second uplink channel. For example, at least one activated TCI state (or each activated TCI state) of the A activated TCI states is the latest activated TCI state before the second uplink channel. Optionally, the activated TCI state refers to the latest activated TCI state before the CSI reference resource corresponding to the CSI report carried by the second uplink channel. For example, at least one activated TCI state (or each activated TCI state) of the A activated TCI states is the latest activated TCI state before the CSI reference resource corresponding to the second uplink channel. Since the activated TCI states are time-varying, this method may clarify which activated TCI states may be used for initiation of CSI or for determination of the event, preventing the UE from using the erroneous activated TCI state to trigger the CSI or determine the event and improving the reliability of the UE.

[0226] The UE may initiate transmission of the first uplink channel and / or the second uplink channel. The UE may transmit the first uplink channel and / or the second uplink channel. For example, the UE may transmit the first uplink channel and / or the second uplink channel for reporting the CSI.

[0227] Optionally, the first uplink channel may be PUCCH. Optionally, the resource corresponding to the first uplink channel may be periodic PUCCH resource. Optionally, the format corresponding to PUCCH may be PUCCH format 0, or PUCCH format 1. Optionally, the resource for transmitting the first uplink channel may be configured by the base station. Optionally, the CSI reporting configuration is used for indicating the resource for transmitting the first uplink channel. Optionally, the parameter (for example, firstPUCCHResourceConfig-UEIBR-r19) included in the CSI reporting configuration may be used for indicating the resource for transmitting the first uplink channel. Optionally, the parameter includes at least one of the followings: a resource ID, periodicity associated with the resource, an offset associated with the resource, an ID of the BWP. For example, a parameter for transmission corresponding to the resource of the first uplink channel may be determined by the configured resource ID. For example, the time domain position corresponding to the transmission of the first uplink channel may be determined based on the periodicity associated with the resource and / or the offset associated with the resource. For example, the transmission occasion of the first uplink channel may be determined based on the periodicity associated with the resource and / or the offset associated with the resource.

[0228] Optionally, the BWP where the resource of the first uplink channel is located may be predefined, or indicated by the base station. Optionally, the BWP where the resource of the first uplink channel is located may be indicated by the parameter in the CSI reporting configuration. Optionally, the BWP where the resource of the first uplink channel is located may be a predefined BWP. Optionally, the BWP is an uplink BWP. Optionally, the predefined BWP may be an active BWP, or an initial BWP, or a default BWP, or a BWP with the smallest ID, or a BWP with the largest ID.

[0229] Optionally, the first uplink channel corresponds to a 1-bit indication. Optionally, the UE may indicate one information bit through the first uplink channel.

[0230] Optionally, the first uplink channel may be triggered based on comparison of the L1-RSRP of the reference signal resource associated with the indicated TCI state and a first threshold. Optionally, the first uplink channel may be triggered based on comparison of the difference between the L1-RSRP of the reference signal resource associated with the indicated TCI state and the L1-RSRP of the resource in the resource set and a configured second threshold. Optionally, the first uplink channel may be triggered based on comparison of the difference between the L1-RSRP of the reference signal resource associated with the activated TCI state and the L1-RSRP of the resource in the resource set and a configured third threshold. The reference signal associated with the activated TCI state may be the reference signal with the Q-th highest L1-RSRP of the reference signals associated with the activated TCI state, Q 1. Here, the activated TCI state may be one or more activated TCI states, where each activated TCI state is associated with a reference signal. Optionally, the second threshold and the third threshold may be indicated by the same parameter. Optionally, the L1-RSRP may be the measured L1-RSRP.

[0231] Optionally, the first uplink channel may be triggered based on the event. In the disclosure, the term "event" may be used interchangeably with the term "condition" or "condition of event". In the disclosure, the event may include at least one of the followings: a Type 1 event, a Type 2 event, a Type 3 event. The event or the type of the event may be predefined or indicated by the base station. For example, the event or the type of the event may be indicated by the CSI reporting configuration. For example, the event or the type of the event may be indicated by the parameter (e.g., eventType-r19) included in the CSI reporting configuration. For example, the base station may indicate at least one of the Type 1 event, the Type 2 event, and the Type 3 event. Optionally, the UE may transmit the first uplink channel based on the indicated event. In the disclosure, the quantity associated with the reference signal is exemplified by L1-RSRP. The quantity associated with the reference signal may also be of other types, such as L1-SINR, CQI, Reference Signal Received Quality (RSRQ), etc. In the disclosure, the quantity may be referred to as the L1 quantity. In the disclosure, the UE may obtain the quantity associated with the reference signal through measurement. The quantity obtained by the UE through measurement may be called the measurement quantity. In the disclosure, the UE may report to the base station the quantity associated with the reference signal obtained based on the measurement of the reference signal. The quantity reported by the UE to the base station may be called the reported quantity.

[0232] The Type 1 event is defined as the L1-RSRP of the reference signal resource associated with the indicated TCI state being lower than or equal to the first threshold. Optionally, the L1-RSRP may be the measured L1-RSRP. For example, the L1-RSRP is determined by measurement of the corresponding reference signal resource. Optionally, the first threshold may be an L1-RSRP threshold. Optionally, the first threshold corresponds to L1-RSRP. Optionally, the first threshold may be predefined or indicated by the base station. For example, the first threshold may be indicated by the parameter (e.g., eventThresholdEvent1-r19) in the CSI reporting configuration. For example, when the parameter is not configured in the CSI reporting configuration, the first threshold is determined based on the L1-RSRP threshold for beam failure recovery (or the L1-RSRP threshold for random access), or the first threshold is equal to the L1-RSRP threshold for beam failure recovery (or the L1-RSRP threshold for random access). Optionally, the L1-RSRP threshold for beam failure recovery may be the threshold used for determining whether a candidate beam is included in the MAC-CE reported by the UE. For example, when the parameter is not configured in the CSI reporting configuration, the first threshold is equal to the L1-RSRP threshold for beam failure recovery (e.g., rsrp-ThresholdSSB), or the L1-RSRP threshold for beam failure recovery (e.g., rsrp-ThresholdBFR). Optionally, the first threshold may be indicated by the parameter RSRP-Range. The parameter is used for indicating the value of L1-RSRP. The parameter RSRP-Range may be in the CSI reporting configuration. The value of L1-RSRP corresponding to the first threshold may be (RSRP-Range-156) dBm or (RSRP-Range-140) dBm. Optionally, the value of RSRP-Range is an integer ranged from 16 to 113. For example, when the value of L1-RSRP corresponding to the first threshold is (RSRP-Range-156) dBm, the value of RSRP-Range is an integer ranged from 16 to 113. Optionally, the value of RSRP-Range is an integer ranged from 0 to 97. For example, when the value of L1-RSRP corresponding to the first threshold is (RSRP-Range-140) dBm, the value of RSRP-Range is an integer ranged from 0 to 97.

[0233] The Type 2 event may be defined as the comparison of the L1-RSRP of at least one resource in the resource set and the L1-RSRP of the reference signal associated with the indicated TCI state being greater than or equal to the second threshold. For example, the Type 2 event may be defined as the difference between the L1-RSRP of at least one resource in the resource set and the L1-RSRP of the reference signal associated with the indicated TCI state being greater than or equal to the second threshold. Optionally, the L1-RSRP may be the measured L1-RSRP. For example, the L1-RSRP is determined by measurement of the corresponding reference signal resource. Optionally, the second threshold may be an L1-RSRP threshold. Optionally, the second threshold corresponds to L1-RSRP. Optionally, the second threshold may be predefined or indicated by the base station. For example, the second threshold may be indicated by the parameter (e.g., eventThreshold-r19) in the CSI reporting configuration. Optionally, the unit of the second threshold is dB. Assume that the value of eventThreshold-r19 is y, then eventThreshold-r19 corresponds to y dB or S*y dB. y 0, or y> 0. S is a scaling factor. The value of S may be predefined. S>0. For example, S may be one of 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 16.

[0234] The Type 3 event may be defined as the comparison of the L1-RSRP of at least one resource in the resource set and the L1-RSRP of the reference signal with the Q-th highest L1-RSRP of the reference signals associated with the activated TCI state being greater than or equal to the third threshold. For example, the Type 3 event may be defined as the difference between the L1-RSRP of at least one resource in the resource set and the L1-RSRP of the reference signal associated with a specific activated TCI state being greater than or equal to the third threshold. The reference signal associated with the specific activated TCI state may be the reference signal with the Q-th highest L1-RSRP of the reference signals associated with the activated TCI state. Here, Q 1. Optionally, the L1-RSRP may be the measured L1-RSRP. For example, the L1-RSRP is determined by measurement of the corresponding reference signal resource. Optionally, the third threshold may be an L1-RSRP threshold. Optionally, the third threshold corresponds to L1-RSRP. Optionally, the third threshold may be predefined or indicated by the base station. For example, the third threshold may be indicated by the parameter (e.g., eventThreshold-r19) in the CSI reporting configuration. Optionally, the third threshold may be equal to the second threshold. Optionally, the third threshold may be indicated by the same parameter as the second threshold. Optionally, the unit of the third threshold is dB. Assume that the value of eventThreshold-r19 is y, then eventThreshold-r19 corresponds to y dB or S*y dB. y 0, or y>0. S is a scaling factor. The value of S may be predefined. S>0. For example, S may be one of 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 8, 16. Optionally, the value of Q may be predefined or indicated by the base station. For example, Q may be indicated by the CSI reporting configuration. For example, Q may be indicated by the parameter (valueOfQ-r19) in the CSI reporting configuration. For example, when the parameter is not configured, the value of Q is 1. For example, when the parameter is not configured, the value of Q is equal to the number of the activated TCI states. Optionally, Q may be a positive integer greater than or equal to 1. Optionally, Q≤8. Optionally, Q is less than or equal to 8.

[0235] In the disclosure, the UE may be activated with A TCI states, A 1. For example, the UE may be activated by MAC-CE with A TCI states. The number of the activated TCI states may be denoted as A.

[0236] Since the number of the activated TCI states is determined based on the indication of MAC-CE and the value of Q is configured, in some cases, the number of the activated TCI states may be less than the configured value of Q. In this case, the behavior of the UE is unclear, causing the corresponding event to be erroneously detected. The method provided below may prevent the event from being erroneously detected and improve the reliability of the communication system.

[0237] Optionally, Q (e.g., Q indicated by the base station) is less than or equal to the number of the activated TCI states. Optionally, the number of the activated TCI states is greater than or equal to Q (e.g., Q indicated by the base station). This method may avoid the situation where the event cannot be detected due to the number of the activated TCI states being less than Q, improving the reliability of the communication system. Optionally, Q is determined based on the indication from the base station and the number of the activated TCI states. Optionally, Q is equal to the smaller value of the value indicated by the base station (for example, the value indicated by valueOfQ-r19) and the number of the activated TCI states. Optionally, when the number of the activated TCI states is less than or equal to the value indicated by the base station (for example, the value indicated by valueOfQ-r19), Q is equal to the number of the activated TCI states. Optionally, when the number of the activated TCI states is less than or equal to the value indicated by the base station (for example, the value indicated by valueOfQ-r19), Q is equal to a predefined value. Optionally, the predefined value may be one of 1, 2, 3, 4, 5, 6, 7, 8. Optionally, when the number of the activated TCI states is greater than or equal to the value indicated by the base station (for example, the value indicated by valueOfQ-r19), Q is equal to the value indicated by the base station. This method may avoid the situation where the event cannot be detected due to the number of the activated TCI states being less than the value of Q indicated by the base station, improving the reliability of the communication system.

[0238] Optionally, the UE may determine whether to transmit the first uplink channel based on the number of the activated TCI states and / or the value of Q indicated by the base station. Optionally, the transmission of the first uplink channel is determined based on the number of the activated TCI states and / or the value of Q indicated by the base station. Optionally, when the number of the activated TCI states is greater than or equal to the value of Q indicated by the base station, the UE transmits the first uplink channel. Optionally, when the number of the activated TCI states is less than or equal to the value of Q indicated by the base station, the UE does not transmit the first uplink channel. This method may avoid uplink channel transmission when the number of the activated TCI states is less than or equal to the value of Q indicated by the base station, saving the power consumption of the UE.

[0239] Optionally, the UE may determine whether to evaluate the event based on the number of the activated TCI states and / or the value of Q indicated by the base station. The evaluation of the event may be used for determining an event instance. Refer below for the determination of the event instance. Optionally, when the number of the activated TCI states is greater than or equal to the value of Q indicated by the base station, the UE evaluates the event (or the UE evaluates the indicated event). Optionally, when the number of the activated TCI states is less than or equal to the value of Q indicated by the base station, the UE does not evaluate the event (or the UE does not evaluate the indicated event). This method may stop the evaluation of the event when the number of the activated TCI states is less than or equal to the value of Q indicated by the base station, saving the power consumption of the UE.

[0240] In the disclosure, the term "the number of TCI states" may be used interchangeably with the term "the number of reference signals associated with TCI states".

[0241] The method for the UE to determine whether to transmit the first uplink channel based on the detection of the event is further described below. Optionally, the UE may determine the transmission of the first uplink channel based on at least one of the following events. Optionally, the UE may determine whether to transmit the first uplink channel based on at least one of the following events.

[0242] Method#1: when the event (e.g., the indicated event) is determined, the UE may transmit the first uplink channel. The UE determines the transmission of the first uplink channel based on the measurement of the occasion of the reference signal associated with the event. Optionally, the occasion of the reference signal refers to the occasion of the reference signal no later than the reference resource associated with the first uplink channel. Optionally, the occasion of the reference signal refers to the occasion of the latest reference signal no later than the reference resource associated with the first uplink channel. Optionally, the reference resource is no later than the first uplink channel. Optionally, the time domain resource of the reference resource is determined based on the resource for transmitting the first uplink channel. For the Type 1 event, the reference signal associated with the event refers to the reference signal associated with the indicated TCI state. For the Type 2 event, the reference signal associated with the event refers to the reference signal associated with the indicated TCI state and / or the reference signal corresponding to the resources (for example, all resources) in the resource set. For the Type 3 event, the reference signal associated with the event refers to the reference signal associated with the activated TCI state (e.g., all activated TCI states) and / or the reference signal corresponding to the resources (e.g., all resources) in the resource set. When multiple types of events are indicated, the reference signals associated with multiple types of events refer to the union of the reference signals associated with each event of the multiple types of events. Optionally, the reference signals associated with the events have the same periodicity. Optionally, the periodicity of the reference signal resource associated with the event associated with the CSI reporting configuration is the same as the periodicity of the Z reference signal resources associated with the CSI reporting configuration. Optionally, the reference signals associated with the events are configured with the same periodicity. The above method may reserve processing time for the triggering of the first uplink channel by the reference resource to avoid the situation where the first uplink channel cannot be triggered because it is too late for the UE to process the corresponding measurement result, improving the reliability of the communication system.

[0243] For example, the UE transmits the first uplink channel. The occasion of the reference signal associated with the event for triggering the first uplink channel is no later than the reference resource associated with the first uplink channel. The occasion of the reference signal associated with the event for triggering the first uplink channel is no later than the latest measurement occasion of the reference resource associated with the first uplink channel. The reference resource is no later than the first time domain resource where the first uplink channel is located. The reference resource may be determined based on the first time domain resource. For example, the reference resource may be the first time domain resource. For example, the offset between the time domain unit where the reference resource is located and the time domain unit corresponding to the first time domain resource may be predefined or based on the UE capability or indicated by the base station. For example, if the time domain unit corresponding to the first time domain resource is time domain unit n, then the time domain unit where the reference resource is located is n-noffset. Optionally, the value of noffset is an integer. Optionally, noffset 0. Optionally, the value of noffset may be predefined. Optionally, the value of noffset may be determined based on the UE capability. Optionally, the value of noffset may be indicated by the base station.

[0244] Method#2: in a time window, when the number of the event instances is greater than or equal to C, the UE may transmit the first uplink channel. Optionally, the length of the time window is indicated by the base station. For example, the length of the time window is indicated by the parameter (e.g., eventDetectionTimeWindowLength-r19) in the CSI reporting configuration. Optionally, the end of the time window (or the ending time domain unit) is determined based on the second time domain resource where the first uplink channel is located. For example, the offset between the end of the time window (or the ending time domain unit) and the start of the first uplink channel (or the starting time domain unit) is indicated by the base station or predefined or based on the UE capability. For example, if the starting time domain unit of the second time domain resource is time domain unit n, the ending time domain unit of the time domain window is n-n2offset. Optionally, the value of n2offset is an integer. Optionally, n2offset 0. Optionally, the value of n2offset may be predefined. Optionally, the value of n2offset may be determined based on the UE capability. Optionally, the value of n2offset may be indicated by the base station. Optionally, C may represent the number of event instances within a time window that the UE may initiate CSI report. Optionally, C may be indicated by the base station. Optionally, C 1. Optionally, C may be indicated by the parameter (e.g., eventInstanceCount-r19) included in the CSI reporting configuration.

[0245] Optionally, counting the determined event instance within a time window may be for the same reference signal (or the same indicated TCI state, or the same activated TCI state). For example, for the type 3 event, counting the determined event instance within a time window may be for the same activated TCI state of the activated TCI states (or the reference signal corresponding to the same activated TCI state). For example, for the Type 2 event and / or Type 3 event, counting the determined event instance within a time window may be for the same resource (or the reference signal corresponding to the same resource) in the resource set, and / or or for the same indicated TCI state (or the reference signal associated with the same indicated TCI state). For example, for the Type 1 event, counting determined event instance within a time window may be for the same indicated TCI state (or the reference signal associated with the same indicated TCI state). Counting the event for the same reference signal may facilitate the UE to evaluate the direction corresponding to the reference signal, in order to initiate the CSI report for that direction accordingly when the channel state changes.

[0246] The UE may determine / evaluate the event (or the event instance). The UE may count the time instance. The periodicity at which the event instance is determined / counted / evaluated may be based on / equal to the periodicity of the reference signal associated with the event. Refer above for the method of determining the reference signal associated with the event. The periodicity at which the event instance is determined / counted / evaluated may be based on / equal to the maximum periodicity (or the minimum periodicity) of the periodicities of the reference signals associated with the event.

[0247] Optionally, one or more evaluation periods may be included in a time window. Optionally, one or more evaluation periods in a time window may be determined based on the determined / counted / evaluated periodicity of the event instance. When an event is determined within an evaluation period (e.g., the corresponding condition is satisfied within an evaluation period), the event is counted once in the evaluation period. For example, the corresponding counter is incremented once.

[0248] In the disclosure, an event being determined may be considered that the condition of the event is satisfied, or that the definition of the event is satisfied. Optionally, the determination of the event may be determined based on the evaluation of the event (or the condition associated with the event instance). In the disclosure, an event instance being determined may be considered that the condition corresponding to the event instance is satisfied, or the definition corresponding to the event instance is satisfied. Optionally, the determination of the event instance may be determined based on the evaluation of the event instance (or the condition associated with the event instance).

[0249] In some cases, the transmission of the first uplink channel may be determined based on the indication of the activated TCI state (e.g., the indication of MAC-CE signaling). Refer above for the indication method of the activated TCI state. When the Type 3 event is indicated, the UE may transmit the first uplink channel based on measurement of the reference signal associated with the (latest) activated TCI state.

[0250] Optionally, the time domain separation between the time domain unit associated with the indication of the (latest) activated TCI state and the time domain unit associated with the first uplink channel is greater than or equal to a fourth threshold. Optionally, when the time domain separation between the time domain unit associated with the indication of the (latest) activated TCI state and the time domain unit associated with the first uplink channel is greater than or equal to the fourth threshold, the UE transmits the first uplink channel. Optionally, the indication of the latest activated TCI state refers to the indication of the latest activated TCI state before the transmission of the first uplink channel. Optionally, the time domain unit associated with the indication of the activated TCI state refers to the time domain unit where the activated TCI state is applied, or the time domain unit where the activated TCI state applies. The activated TCI state being applied may be that the indication of the activated TCI state being applied. The activated TCI state applying may be the indication of the activated TCI state applying. The time domain unit where the activated TCI state is applied (or the activated TCI state applies) may be the starting time domain unit / first one of time domain units where the activated TCI state is applied (or the activated TCI state applies). Optionally, the time domain resource associated with the first uplink channel may be the time domain unit associated with the first uplink channel. Optionally, the time domain resource associated with the first uplink channel refers to the time domain resource / time domain unit where the first uplink channel is transmitted. Optionally, the time domain resource associated with the first uplink channel refers to the time domain resource where the first uplink channel is located, or the starting time domain resource / ending time domain resource of the first uplink channel. In the disclosure, the time domain separation between time domain units may be the offset between the time domain units. Optionally, the fourth threshold may be indicated by the base station, or the fourth threshold may be predefined, or the fourth threshold may be based on the UE capability. Optionally, the unit of the fourth threshold may be a symbol / a slot. Optionally, the fourth threshold may be an integer greater than or equal to 1.

[0251] Optionally, when the indication of the activated TCI state is received within the time window (or applies within the time window), the corresponding first uplink channel is not transmitted. Optionally, if no indication of the activated TCI state is received within the time window, or no indication of the activated TCI state applies within the time window, the first uplink channel may be transmitted.

[0252] Optionally, the counting of the event instance may be determined based on the indication of the activated TCI state. For example, a counter used for counting the event instance may be reset by the indication of the activated TCI state. For example, when the UE receives the indication of the activated TCI state, the counter is reset. For example, the counter is reset when the indication of the activated TCI state applies. When the value of the counter is greater than or equal to C, the UE may trigger the first uplink channel.

[0253] The above method may allow the UE to have sufficient time to measure the reference signal associated with the activated TCI state when the activated TCI state changes due to the corresponding indication.

[0254] Optionally, the second uplink channel may be PUSCH. Optionally, the second uplink channel may be used for carrying the CSI report. Optionally, the second uplink channel may be used for carrying the beam report.

[0255] Optionally, the resource for transmitting the second uplink channel may be dynamically scheduled. Optionally, the resource corresponding to the second uplink channel may be indicated by DCI. For example, the DCI may be DCI format 0_1 / 0_2.

[0256] Optionally, the resource for transmitting the second uplink channel may be configured by the base station. Optionally, the CSI reporting configuration is used for indicating the resource for transmitting the second uplink channel. Optionally, the parameter (for example, configredResourceForSecondChannelOfModeB-r19) included in the CSI reporting configuration may be used for indicating the resource for transmitting the second uplink channel. Optionally, the second uplink channel may be PUSCH based on configured grant. Optionally, the second uplink channel is associated with a configured grant configuration. Optionally, the configured grant configuration is a type 1 configured grant. Optionally, the UE may transmit the second uplink channel based on the configured grant configuration. Optionally, the UE may transmit the second uplink channel based on the resource indicated by the configured grant configuration. Optionally, the parameter included in the CSI reporting configuration may indicate the ID of the configured grant configuration. The parameter may also indicate the serving cell and / or BWP where the configured grant configuration is located. Optionally, the BWP is an uplink BWP.

[0257] Optionally, the UE expects the BWP associated with the configured grant configuration / with which the configured grant configuration is configured to be an active BWP. Optionally, the BWP associated with the configured grant configuration / with which the configured grant configuration is configured is an active BWP. This method may prevent the second uplink channel from being unable to be transmitted due to the suspension of the configured grant configuration caused by BWP deactivation, improving the reliability of the communication system.

[0258] Optionally, the UE may determine the transmission of the first uplink channel based on the BWP with which the configured grant configuration is configured. Optionally, the UE may determine whether to transmit the first uplink channel based on whether the BWP with which the configured grant configuration is configured is an active BWP. Optionally, if the BWP where the configured grant configuration is located is not an active BWP, the UE does not transmit the first uplink channel and / or the second uplink channel. Optionally, if the BWP where the configured grant configuration is located is an active BWP, the UE may transmit the first uplink channel and / or the second uplink channel. Optionally, the first uplink channel and / or the second uplink channel and / or the configured grant configuration correspond to the same CSI reporting configuration. Optionally, when the BWP where the configured grant configuration is located is not an active BWP, the CSI reporting configuration associated with / corresponding to the configured grant configuration may be suspended. Optionally, when the BWP where the configured grant configuration is located is not an active BWP, the event evaluation (or the measurement associated with the event, or the counting of the event, or the determination of the event) associated with CSI reporting configuration associated with / corresponding to the configured grant configuration may be suspended. Optionally, when the BWP where the configured grant configuration is located is not an active BWP, the configured grant configuration may be suspended. Optionally, this method is applicable to the Type 2 event and / or Type 3 event. Optionally, this method is applicable to Mode B. Mode B is described below. This method may prevent the associated first uplink channel / second uplink channel from being triggered / transmitted in the case where the second uplink channel cannot be transmitted due to the suspension of the configured grant configuration, saving the energy consumption of the UE.

[0259] In the disclosure, the term "suspend" may be used interchangeably with the term "deactivate" or "stop". In the disclosure, the term "activate" may be used interchangeably with the term "resume" or "start".

[0260] Optionally, the configured grant configuration may indicate the periodicity for uplink transmission. For example, the configured grant configuration may indicate the periodicity of the transmission occasion for transmitting the second uplink channel. Optionally, the periodicity may be the same as the periodicity associated with the first uplink channel (for example, the periodicity of the PUCCH resource).

[0261] Optionally, the transmission of the first uplink channel and / or the transmission of the second uplink channel may be based on Mode A or Mode B. A CSI reporting configuration may be associated with Mode A or Mode B. Optionally, the mode with which a CSI reporting configuration may be associated may be determined based on whether the CSI reporting configuration includes the parameter (for example, configredResourceForSecondChannelOfModeB-r19) for configuring the resource of the second uplink channel. For example, if the CSI reporting configuration does not include the parameter for configuring the resource of the second uplink channel, the CSI reporting configuration corresponds to Mode A. For example, if the CSI reporting configuration includes the parameter for configuring the resource of the second uplink channel, the CSI reporting configuration corresponds to Mode B. Optionally, the mode with which a CSI reporting configuration may be associated may be indicated by the parameter (e.g., reportTransmissionMode-r19) in the CSI reporting configuration. The parameter may indicate (e.g., explicitly indicate) one of Mode A and Mode B.

[0262] Mode A includes at least one of the following steps: step 1: the UE transmits the first uplink channel; step 2: the UE detects DCI, where the DCI indicates the resource of the second uplink channel; step 3: the UE transmits the second uplink channel.

[0263] For Mode A, the first uplink channel may be used to request the resource of the second uplink channel. For example, the UE may transmit the first uplink channel to request the base station for the resource of the second uplink channel for transmitting the CSI report.

[0264] For Mode A, the UE receives / monitors the PDCCH candidate (for detecting DCI). Optionally, the UE may receive / detect DCI, where the DCI indicates the resource of the second uplink channel. Optionally, the second uplink channel is used for carrying the CSI report. Optionally, the DCI is associated with the first uplink channel. Optionally, the DCI may trigger / indicate a CSI triggering state. Optionally, the CSI triggering state may be an aperiodic CSI triggering state. Optionally, the CSI triggering state may indicate one or more CSI reporting configurations. Optionally, the one or more CSI reporting configurations include the CSI reporting configuration associated with the first uplink channel. Optionally, the DCI is a feedback for the first uplink channel. Optionally, the DCI may be DCI format 0_1 or 0_2.

[0265] Mode B includes at least one of the following steps: step 1: the UE transmits the first uplink channel; step 2: the UE transmits the second uplink channel.

[0266] For Mode B, the first uplink channel may indicate / notify the second uplink channel (e.g., the second uplink channel carrying the CSI report). For example, the UE may transmit the first uplink channel to the base station to notify the base station that the UE would transmits the second uplink channel for carrying the CSI report.

[0267] For Mode B, the second uplink channel may carry the CSI report associated with the CSI reporting configuration. Optionally, the second uplink channel may be determined based on the first uplink channel. Optionally, the resource of the second uplink channel is determined based on the first uplink channel. Optionally, the transmission occasion of the second uplink channel is determined based on the first uplink channel. Optionally, the UE transmits the second uplink channel in the first transmission occasion after X symbols after the last symbol transmitting the first uplink channel. Optionally, the UE would transmit the first uplink channel, and the UE transmits the second uplink channel in the first transmission occasion after X symbols of the last symbol of the first uplink channel. Optionally, the UE would transmit the first uplink channel may be that the UE is indicated to transmit the first uplink channel, or the UE is to transmit the first uplink channel. Optionally, if information associated with the first uplink channel (for example, UCI) is multiplexed in a third uplink channel, the UE transmits the second uplink channel in the first occasion after X symbols of the last symbol of the third uplink channel. Optionally, the third uplink channel may be PUCCH or PUSCH. Optionally, the third uplink channel may be a different channel from the first uplink channel. The above method may define whether the reference point of X symbols is determined based on the first uplink channel before UCI multiplexing or the third uplink channel after UCI multiplexing, preventing the UE from transmitting the second uplink channel based on the wrong reference point and improving the reliability of the communication system. Optionally, the third uplink channel may include / correspond to / be associated with one or more repetitions. The last symbol of the third uplink channel may be the last symbol of the last repetition of the one or more repetitions associated with the third uplink channel. Optionally, the value of X may be indicated by the base station, or the value of X is predefined, or the value of X is based on the UE capability. The value of X may be an integer greater than or equal to 0. Optionally, the subcarrier spacing of X symbols (the subcarrier spacing corresponding to X) is determined based on the subcarrier spacing of the first uplink channel and / or the subcarrier spacing of the second uplink channel. For example, the subcarrier spacing of X symbols is equal to the subcarrier spacing of the first uplink channel. For example, the subcarrier spacing of X symbols is equal to the subcarrier spacing of the second uplink channel. For example, the subcarrier spacing of X symbols is equal to the larger / smaller value of the subcarrier spacing of the first uplink channel and the subcarrier spacing of the second uplink channel. This method may prevent the UE from using the erroneous subcarrier spacing to determine the transmission occasion to transmit the second uplink channel, improving the reliability of the communication system.

[0268] Optionally, the first transmission occasion may be the first valid transmission occasion. A transmission occasion may be considered as a valid transmission occasion if at least one of the following conditions is satisfied: 1) the transmission occasion is not in a measurement gap; 2) the transmission occasion does not include the downlink symbol, or the transmission occasion includes the uplink symbol and / or the flexible symbol, or the transmission occasion includes only the uplink symbol and / or the flexible symbol. Optionally, the uplink symbol and / or the flexible symbol and / or the downlink symbol are configured by higher layer signaling (for example, configuration information for configuring TDD); 3) the transmission occasion does not include the symbol for receiving SSB. A transmission occasion may be considered as an invalid transmission occasion if at least one of the following conditions is satisfied: 1) the transmission occasion is in a measurement gap; 2) the transmission occasion includes the downlink symbol, or the transmission occasion does not include the uplink symbol and / or the flexible symbol. Optionally, the downlink symbol is configured by higher layer signaling (for example, configuration information for configuring TDD); 3) the transmission occasion includes the symbol for receiving SSB.

[0269] Optionally, the subcarrier spacing of the first uplink channel refers to the subcarrier spacing used for transmitting the first uplink channel. Optionally, the subcarrier spacing of the first uplink channel is the subcarrier spacing of the uplink BWP where the first uplink channel is located. Optionally, the subcarrier spacing of the second uplink channel refers to the subcarrier spacing used for transmitting the second uplink channel. Optionally, the subcarrier spacing of the second uplink channel is the subcarrier spacing of the uplink BWP where the second uplink channel is located. In the disclosure, the term "subcarrier spacing" may be used interchangeably with "subcarrier spacing configuration".

[0270] Optionally, the first uplink channel may correspond to one or more repetitions. For example, the first uplink channel may correspond to one or more PUCCH repetitions. The last symbol of the first uplink channel may be the last symbol of the first uplink channel corresponding to the last repetition (or the first repetition) of the one or more repetitions.

[0271] The content of the CSI report (for example, the content of the CSI report carried by the second uplink channel, or the content of the CSI report initiated by the UE) is discussed below. In the following, the CSI reported by the UE is exemplified by CRI, SSBRI, and L1-RSRP, and is not limited thereto. The CSI reported by the UE may also be of other types, such as SINR, CQI, etc. In the disclosure, the L1-RSRP reported by the UE may be referred to as the reported L1-RSRP.

[0272] The L1-RSRP reported by the UE may be absolute L1-RSRP or differential L1-RSRP.

[0273] 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 1 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 1, 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.

[0274]

[0275]

[0276] Table 1

[0277] 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 2 below. RSRP 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 2, the value corresponding to DIFFRSRP_x is x. For example, the value corresponding to DIFFRSRP_0 is 0.

[0278]

[0279] Table 2

[0280] The UE may report the L1-RSRP of the reference signal resource associated with the indicated TCI state. When the Type 1 event is configured, the UE may report the L1-RSRP of the reference signal resource associated with the indicated TCI state. The L1-RSRP is obtained by measuring the reference signal resource associated with the indicated TCI state. Optionally, the L1-RSRP may be absolute L1-RSRP or differential L1-RSRP. Optionally, whether the L1-RSRP is absolute L1-RSRP or differential L1-RSRP may be determined by the indication from the base station or based on the UE capability. Optionally, whether the L1-RSRP is differential L1-RSRP may be determined by the indication from the base station or based on the UE capability. For example, the CSI reporting configuration may include the parameter for indicating whether the L1-RSRP is absolute L1-RSRP or differential L1-RSRP. For example, the CSI reporting configuration may include the parameter for indicating whether the L1-RSRP is differential L1-RSRP. For example, if the UE supports the L1-RSRP as differential L1-RSRP, the UE reports the differential L1-RSRP corresponding to the L1-RSRP. For example, if the UE does not support the L1-RSRP as differential L1-RSRP, the UE reports the absolute L1-RSRP corresponding to the L1-RSRP.

[0281] Optionally, the differential L1-RSRP may be determined based on the difference of the reference L1-RSRP and the measured L1-RSRP. Optionally, the reference L1-RSRP may be indicated by the base station, or the reference L1-RSRP may be predefined, or the reference L1-RSRP may be determined based on the highest measured L1-RSRP in a report. Optionally, the reference L1-RSRP is a predefined L1-RSRP. The unit of L1-RSRP may be dBm. A predefined L1-RSRP may be Z dBm, where Z is an integer. Optionally, the reference L1-RSRP may be indicated by the CSI reporting configuration. Optionally, the reference L1-RSRP may be determined based on the first threshold. Optionally, the reference L1-RSRP may be the L1-RSRP corresponding to the first threshold. Refer above for description of the first threshold. Based on the definition of the Type 1 event, it may be known that the measured L1-RSRP of the reference signal resource associated with the indicated TCI state is less than or equal to the first threshold. Therefore, the UE may perform differential L1-RSRP reporting and set the reference L1-RSRP to the L1-RSRP corresponding to the first threshold, thereby reducing the overhead of CSI reporting.

[0282] The UE may report the L1-RSRP of the resources in the resource set. Optionally, the UE may report the L1-RSRP of N reference signal resources. When the Type 1 event is configured, the UE may report the L1-RSRP of the N reference signal resources. In a CSI report instance, the UE may report the L1-RSRP of the N reference signal resources and / or the L1-RSRP of the reference signal resource associated with the indicated TCI state. N is described below. The L1-RSRP of the N reference signal resources refer to the 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.

[0283] The number of the reference signal resources the UE may be configured to report is N, where N 1. Optionally, the reference signal resources are the resources 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 (e.g., nrofReportedRS-UEIBR-r19) in the CSI reporting configuration. The value of N may be one of 1, 2, 3, and 4. Optionally, at least one of Type 1 event, Type 2 event, and Type 3 event may be configured with N.

[0284] The UE may report the L1-RSRP of the N reference signal resources and the L1-RSRP of the reference signal resource associated with the indicated TCI state.

[0285] Optionally, if the event associated with the CSI reporting configuration is a Type 1 event, the L1-RSRP of the reference signal associated with the indicated TCI state in the CSI report corresponding to the CSI reporting configuration satisfies the Type 1 event (or satisfies the condition corresponding to the Type 1 event). Optionally, if the event associated with the CSI reporting configuration is a Type 1 event, the reference signal resource associated with the indicated TCI state associated with the CSI report corresponding to the CSI reporting configuration satisfies the Type 1 event (or satisfies the condition corresponding to the Type 1 event). For example, the measured L1-RSRP of the reference signal associated with the indicated TCI state is less than or equal to the first threshold.

[0286] The method of determining the content of the CSI report is discussed below.

[0287] Optionally, the L1-RSRP of the N reference signal resources include a first L1-RSRP and N-1 differential L1-RSRP. Optionally, when N>1, the L1-RSRP of the N reference signal resources include a first L1-RSRP and N-1 differential L1-RSRP. Optionally, the first L1-RSRP corresponds to the resource with the highest measured L1-RSRP of the N reference signal resources. For example, the first L1-RSRP is determined / quantized based on the resource with the highest measured L1-RSRP of the N reference signal resources. Optionally, the first L1-RSRP is the L1-RSRP of the reference signal resource with the highest measured L1-RSRP of the N reference signal resources. Optionally, at least one L1-RSRP of the N-1 differential L1-RSRP (or each L1-RSRP of the N-1 differential L1-RSRP) is determined based on at least one of the followings: 1) the measured L1-RSRP of the reference signal resource corresponding to the first L1-RSRP; 2) the reference signal resource with the highest measured L1-RSRP of the N reported resources; 3) the highest measured L1-RSRP of the measured L1-RSRP of the N reported resources; 4) the measured L1-RSRP of the reference signal resource corresponding to the first L1-RSRP; 5) the L1-RSRP with the highest measured L1-RSRP of the N L1-RSRP; 6) the first L1-RSRP. Optionally, the first L1-RSRP is the L1-RSRP of the resource with the highest measured L1-RSRP of the N reference signal resources.

[0288] Optionally, the L1-RSRP (e.g., differential L1-RSRP) of the reference signal resource associated with the indicated TCI state may be determined based on the first threshold, or determined based on the first L1-RSRP, or determined based on the measured L1-RSRP corresponding to the first L1-RSRP. For example, the reference L1-RSRP associated with the differential L1-RSRP of the reference signal resource associated with the indicated TCI state may be equal to / based on the first threshold, or the first L1-RSRP, or the measured L1-RSRP corresponding to the first L1-RSRP. The measured L1-RSRP corresponding to the first L1-RSRP may be the highest measured L1-RSRP of the N measured L1-RSRP, where the N measured L1-RSRP is one-to-one corresponds to the N reported reference signal resources. When the measured L1-RSRP of the reference signal associated with the indicated TCI state is greater than the measured L1-RSRP corresponding to the first L1-RSRP, the value of the L1-RSRP of the reference signal associated with the indicated TCI state corresponds to a predefined codepoint (or a predefined value). For example, the value of L1-RSRP corresponds to the first (or last) codepoint. For example, the value of L1-RSRP is 0. Optionally, the value of L1-RSRP is 15. 0 may be considered as the minimum value of the 4-bit differential L1-RSRP. 15 may be considered as the maximum value of the 4-bit differential L1-RSRP. Optionally, the value of the reported L1-RSRP corresponds to DIFFRSRP_0 or DIFFRSRP_15 in Table 2. When the maximum measured L1-RSRP corresponding to the N reported reference signal resources is used as the reference L1-RSRP, the measured L1-RSRP of the reference signal associated with the indicated TCI state may be greater than the reference L1-RSRP. The above method may prevent the UE from reporting erroneous differential L1-RSRP in this case, improving the reliability of the communication system.

[0289] Optionally, the UE may report CRIs or SSBRIs corresponding to the N reference signal resources. For example, the UE reports N CRIs / SSBRIs, where the N CRIs / SSBRIs respectively correspond to the N reported resources in the resource set. The size of the CSI field corresponding to CRI / SSBRI is or . Optionally, the value of CRI / SSBRI is denoted as k (k 0). Optionally, k corresponds to the (k+1)-th resource configured in the resource set. Optionally, k corresponds to the (k+1)-th resource of the K resources associated with the resource set.

[0290] Optionally, refer Table 3 below for the mapping order of CSI fields in the CSI report. The UE may determine the CSI based on Table 3. The UE reports N L1-RSRP and the L1-RSRP of the reference signal resource associated with the indicated TCI state. Optionally, the CSI report includes CRI / SSBRI#1, CRI / SSBRI#2, ..., CRI / SSBRI#N. Optionally, the reference signal resource corresponding to CRI / SSBRI#1 is the resource with the highest measured L1-RSRP of the N resources. Optionally, the CSI report includes 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, respectively. Optionally, L1-RSRP#n corresponds to CRI / SSBRI#n. Optionally, L1-RSRP#1 corresponds to the reference signal resource with the maximum measured L1-RSRP of the N reported reference signal resources. Optionally, L1-RSRP#X is the L1-RSRP of the reference signal resource associated with the indicated TCI state. Optionally, L1-RSRP#X may be absolute L1-RSRP or differential L1-RSRP. For example, L1-RSRP#X is differential L1-RSRP, where the differential L1-RSRP is determined based on the L1-RSRP corresponding to the first threshold. For example, L1-RSRP#X is differential L1-RSRP, where the differential L1-RSRP is determined based on CRI / SSBRI#1. Optionally, whether L1-RSRP#X is differential L1-RSRP or absolute L1-RSRP may be indicated by the base station. For example, whether L1-RSRP#X is differential L1-RSRP or absolute L1-RSRP may be indicated by the higher layer parameter. For example, whether L1-RSRP#X is differential L1-RSRP or absolute L1-RSRP may be indicated by the parameter in the CSI reporting configuration. For example, the parameter corresponds to 1 bit. When the bit is a first value (e.g., 0), L1-RSRP#X is absolute L1-RSRP. When the bit is a second value (e.g., 1), L1-RSRP#X is differential L1-RSRP. Optionally, if the L1-RSRP of the indicated reference signal in the CSI report corresponding to the CSI reporting configuration satisfies the associated event (or satisfies the condition corresponding to the associated event), then L1-RSRP#X is differential L1-RSRP. Optionally, if the indicated reference signal in the CSI report corresponding to the CSI reporting configuration does not satisfy the associated event (or does not satisfy the condition corresponding to the associated event), then L1-RSRP#X is absolute L1-RSRP. Optionally, when the CSI report (or the CSI reporting configuration corresponding to the CSI report) is associated with Mode A, the indicated reference signal in the CSI report does not satisfy the associated event (or does not satisfy the condition corresponding to the associated event). Optionally, when the CSI report (or the CSI reporting configuration corresponding to the CSI report) is associated with Mode B, the indicated reference signal in the CSI report satisfies the associated event (or satisfies the condition corresponding to the associated event). Optionally, when the CSI report (or the CSI reporting configuration corresponding to the CSI report) is associated with Mode A, L1-RSRP#X may be absolute L1-RSRP. Optionally, when the CSI report (or the CSI reporting configuration corresponding to the CSI report) is associated with Mode B, L1-RSRP#X may be differential L1-RSRP. The above method may implicitly indicate whether L1-RSRP#X is differential L1-RSRP or absolute L1-RSRP, reducing the overhead of indication signaling and improving the efficiency of the communication system.

[0291]

[0292] Table 3. Mapping order of the CSI fields in the CSI report

[0293] Another method for determining the content of the CSI report is discussed below.

[0294] Optionally, the L1-RSRP of the N reference signal resources and the L1-RSRP of the reference signal resource associated with the indicated TCI state include a second L1-RSRP and N differential L1-RSRP. Optionally, the second L1-RSRP corresponds to the resource with the highest measured L1-RSRP of the N reference signal resources and the reference signal resource associated with the indicated TCI state. For example, the second L1-RSRP is determined / quantized based on the resource with the highest measured L1-RSRP of the N reference signal resources and the reference signal resource associated with the indicated TCI state. Optionally, the second L1-RSRP is the L1-RSRP of the reference signal resource with the highest measured L1-RSRP of the N reference signal resources and the reference signal resource associated with the indicated TCI state. Optionally, at least one L1-RSRP of the N differential L1-RSRP (or each L1-RSRP of the N differential L1-RSRP) is determined based on at least one of the followings: 1) the measured L1-RSRP of the reference signal resource corresponding to the second L1-RSRP; 2) the reference signal resource with the highest measured L1-RSRP of the N reported resources and the reference signal resource associated with the indicated TCI state; 3) the highest measured L1-RSRP of the measured L1-RSRP of the N reported resources and the measured L1-RSRP of the reference signal resource associated with the indicated TCI state; 4) the measured L1-RSRP of the reference signal resource corresponding to the second L1-RSRP; 5) the L1-RSRP with the highest measured L1-RSRP of the N+1 L1-RSRP; 6) the second L1-RSRP. Optionally, the second L1-RSRP is the L1-RSRP of the resource with the highest measured L1-RSRP of the N reference signal resources and the reference signal resource associated with the indicated TCI state.

[0295] Optionally, the UE may report CRIs or SSBRIs corresponding to the N reference signal resources. For example, the UE reports N CRIs / SSBRIs, where the N CRIs / SSBRIs respectively correspond to the N reported resources in the resource set. The size of the CSI field corresponding to CRI / SSBRI is or . Optionally, the value of CRI / SSBRI is denoted as k (k 0). Optionally, k corresponds to the (k+1)-th resource configured in the resource set. Optionally, k corresponds to the (k+1)-th resource of the K resources associated with the resource set.

[0296] Optionally, the UE may report an indicator, where the indicator is used for indicating the reference signal resource associated with the maximum measured L1-RSRP (in the CSI report). Optionally, the indicator indicates that the reference signal resource associated with the maximum measured L1 quantity is one of the followings: 1) the reference signal resource associated with the indicated TCI state; 2) one of the N reported reference signal resources. Optionally, one of the N reported reference signal resources may be the first / last one of the N reported reference signal resources.

[0297] Optionally, refer Table 4 below for the mapping order of the CSI fields in the CSI report. The UE may determine the CSI based on Table 4. The UE reports N L1-RSRP and the L1-RSRP of the reference signal resource associated with the indicated TCI state. Optionally, the CSI report includes CRI / SSBRI#1, CRI / SSBRI#2, ..., CRI / SSBRI#N. Optionally, the reference signal resource corresponding to CRI / SSBRI#1 is the resource with the highest measured L1-RSRP of the N+1 resources. Optionally, the CSI report includes L1-RSRP#1, L1-RSRP#2, ..., L1-RSRP#N+1. Optionally, L1-RSRP#1 is absolute L1-RSRP. Optionally, L1-RSRP#2, ..., L1-RSRP#N+1 are differential L1-RSRP, respectively. Optionally, the differential L1-RSRP is determined based on L1-RSRP#1, or the differential L1-RSRP is determined based on the measured L1-RSRP corresponding to L1-RSRP#1. Optionally, when the indicator indicates one of the N reported reference signal resources, L1-RSRP#n corresponds to CRI / SSBRI#n. Here, 1 n N. L1-RSRP#1 corresponds to the reference signal resource with the maximum measured L1-RSRP of the N reported reference signal resources. Optionally, L1-RSRP#N+1 corresponds to the reference signal resource associated with the indicated TCI state. When the indicator indicates the reference signal resource associated with the indicated TCI state, L1-RSRP#n+1 corresponds to CRI / SSBRI#n. Here, 1≤n N. Optionally, L1-RSRP#1 corresponds to the reference signal resource associated with the indicated TCI state.

[0298]

[0299] Table 4. Mapping order of the CSI fields in the CSI report

[0300] Another method for determining the content of the CSI report is discussed below.

[0301] Optionally, the L1-RSRP of the N reference signal resources and the L1-RSRP of the reference signal resource associated with the indicated TCI state include a third L1-RSRP and N differential L1-RSRP. Optionally, the third L1-RSRP corresponds to the resource with the highest measured L1-RSRP of the N reference signal resources and the reference signal resource associated with the indicated TCI state. For example, the third L1-RSRP is determined / quantized based on the resource with the highest measured L1-RSRP of the N reference signal resources and the reference signal resource associated with the indicated TCI state. Optionally, the third L1-RSRP is the L1-RSRP of the reference signal resource with the highest measured L1-RSRP of the N reference signal resources and the reference signal resource associated with the indicated TCI state. Optionally, at least one L1-RSRP of the N differential L1-RSRP (or each L1-RSRP of the N differential L1-RSRP) is determined based on at least one of the followings: 1) the measured L1-RSRP of the reference signal resource corresponding to the third L1-RSRP; 2) the reference signal resource with the highest measured L1-RSRP of the N reported resources and the reference signal resource associated with the indicated TCI state; 3) the highest measured L1-RSRP of the measured L1-RSRP of the N reported resources and the measured L1-RSRP of the reference signal resource associated with the indicated TCI state; 4) the measured L1-RSRP of the reference signal resource corresponding to the third L1-RSRP; 5) the L1-RSRP with the highest measured L1-RSRP of the N+1 L1-RSRP; 6) the third L1-RSRP. Optionally, the third L1-RSRP is the L1-RSRP of the resource with the highest measured L1-RSRP of the N reference signal resources and the reference signal resource associated with the indicated TCI state.

[0302] Optionally, the UE may report CRIs or SSBRIs corresponding to the N+1 reference signal resources. For example, the UE reports N+1 CRIs / SSBRIs, where the N+1 CRIs / SSBRIs respectively correspond to the N reported resources in the resource set and the reference signal resource associated with the indicated TCI state. The size of the CSI field corresponding to CRI / SSBRI is or . Optionally, the value of CRI / SSBRI is denoted as k (k 0). Optionally, a predefined value of k may correspond to the reference signal resource associated with the indicated TCI state. For example, the predefined value is equal to 0 or K. Optionally, k corresponds to the (k+1)-th resource configured in the resource set. Optionally, k corresponds to the (k+1)-th resource of the K resources associated with the resource set. When k K, k corresponds to the reference signal resource associated with the indicated TCI state. For example, the predefined value is equal to 0. When k = 0, k corresponds to the reference signal resource associated with the indicated TCI state. k corresponds to the k-th resource configured in the resource set. Optionally, k corresponds to the k-th resource of the K resources associated with the resource set.

[0303] Optionally, refer Table 5 below for the mapping order of the CSI fields in the CSI report. The UE may determine the CSI based on Table 5. The UE reports N L1-RSRP and the L1-RSRP of the reference signal resource associated with the indicated TCI state. Optionally, the CSI report includes CRI / SSBRI#1, CRI / SSBRI#2, ..., CRI / SSBRI#N+1. Optionally, the reference signal resource corresponding to CRI / SSBRI#1 is the resource with the highest measured L1-RSRP of the N+1 resources. Optionally, the CSI report includes L1-RSRP#1, L1-RSRP#2, ..., L1-RSRP#N+1. Optionally, L1-RSRP#1 is absolute L1-RSRP. Optionally, L1-RSRP#2, ..., L1-RSRP#N+1 are differential L1-RSRP, respectively. Optionally, the differential L1-RSRP is determined based on L1-RSRP#1, or the differential L1-RSRP is determined based on the measured L1-RSRP corresponding to L1-RSRP#1. Optionally, L1-RSRP#n corresponds to CRI / SSBRI#n. Here, 1≤n≤N+1.

[0304]

[0305] Table 5. Mapping order of the CSI fields in the CSI report

[0306] The disclosure provides the measurement / reporting method for CSI reporting based on the downlink channel, so that the UE may initiate corresponding CSI report by measuring the downlink channel, reducing the transmission overhead of the reference signal for CSI measurement and improving the efficiency of the communication system.

[0307] In some cases, the UE may obtain / receive / be configured with L CSI reporting configurations. Here, L 1, or L>1. Optionally, at least one (or each) CSI reporting configuration of the L CSI reporting configurations is the CSI reporting configuration for the UE initiated CSI report. Refer above for description related to the UE initiated CSI report.

[0308] Optionally, at least one (or each) CSI reporting configuration of the L CSI reporting configurations may indicate the resource for transmitting the first uplink channel. Optionally, at least one (or each) CSI reporting configuration of the L CSI reporting configurations may indicate the ID (for example, a CSI reporting configuration ID, or CSI-ReportConfigId) for identifying the CSI reporting configuration.

[0309] In order to save the resource reserved by the base station for transmitting the first uplink channel, the L CSI reporting configurations may share the same resource for transmitting the first uplink channel. Optionally, the resources of the first uplink channel associated with the L CSI reporting configurations are the same. In the disclosure, resources being the same may mean that IDs of the resources are the same.

[0310] The UE may transmit the first uplink channel. Optionally, the first uplink channel is determined based on a first CSI reporting configuration of the L CSI reporting configurations. Optionally, the first uplink channel is initiated based on the first CSI reporting configuration of the L CSI reporting configurations. Optionally, the transmission of the first uplink channel is based on the first CSI reporting configuration of the L CSI reporting configurations. Optionally, the first uplink channel is triggered based on the event associated with the first CSI reporting configuration of the L CSI reporting configurations. Optionally, the first CSI reporting configuration is selected by the UE from the L CSI reporting configurations.

[0311] Optionally, the transmitted first uplink channel is associated with the L CSI reporting configurations. Optionally, the transmitted first uplink channel being associated with the L CSI reporting configurations includes the resource of the transmitted first uplink channel being associated with the L CSI reporting configurations. Optionally, the resource of the transmitted first uplink channel is the same as the resource associated with the L CSI reporting configurations. Optionally, the resource of the transmitted first uplink channel being the same as the resource associated with the L CSI reporting configurations includes the ID of the resource of the transmitted first uplink channel being the same as the resource of the first uplink channel included in / indicated by the L CSI reporting configurations.

[0312] The UE may transmit the second uplink channel. The second uplink channel includes / carries the CSI report. Optionally, the CSI report in the second uplink channel may be determined based on the first CSI reporting configuration. Optionally, the CSI report in the second uplink channel corresponds to the first CSI reporting configuration.

[0313] Optionally, the CSI report included / carried in the second uplink channel may include / indicate the first CSI reporting configuration. Optionally, a CSI reporting configuration indicator may be included in the CSI report. The indicator indicates a CSI reporting configuration of the L CSI reporting configurations. Optionally, the CSI reporting configuration indicated by the CSI reporting configuration indicator is the first CSI reporting configuration. The size of the CSI field corresponding to the CSI reporting configuration indicator is determined based on L. For example, the size of the CSI field is or . For example, the value k (k 0) of the CSI field corresponds to the (k+1)-th CSI reporting configurations of the L CSI reporting onfigurations. Optionally, the order of the L CSI reporting configurations is determined based on the IDs of the CSI reporting configurations. Optionally, the order of the L CSI reporting configurations is based on the ascending / descending order of the IDs of the CSI reporting configurations. For example, the (k+1)-th CSI reporting of the L CSI reporting configurations refers to the CSI reporting configuration with the (k+1)-th smallest ID value of the CSI reporting configuration of the L CSI reporting configurations. For example, the first CSI reporting configuration of the L CSI reporting configurations refers to the CSI reporting configuration with the smallest ID of the CSI reporting configuration of the L CSI reporting configurations.

[0314] Since the first CSI reporting configuration is selected by the UE, and cannot be known by the base station before demodulating the second uplink channel. In order to prevent the base station from attempting to demodulate the information of the second uplink channel based on the assumption of each CSI reporting configuration of the L CSI reporting configurations, the CSI report needs to be processed so that the UE and the base station have the same understanding of the features related to the CSI report, saving the overhead of reception / detection by the base station. The method of processing the CSI report in the second uplink channel is discussed below.

[0315] Optionally, the payload size of the CSI report in the second uplink channel is determined based on the L CSI reporting configurations. Optionally, the payload size of the CSI report in the second uplink channel is determined based on the payload size of the CSI report associated with the L CSI reporting configurations. Optionally, the payload size of the CSI report corresponding to thel-th CSI reporting configuration of the L CSI reporting configurations is Pl. Here,lmay be an integer ranged from 1 to L, orl= 1, 2, ..., L, or the value oflmay be an integer ranged from 1 to L. Optionally, Plrepresents the payload size of the CSI report corresponding to thel-th CSI reporting configuration. Optionally, Plrepresents the payload size of the CSI report determined based on thel-th CSI reporting configuration. Optionally, the payload size (PCSI) of the CSI report in the second uplink channel is the maximum value of the payload sizes of the CSI reports respectively corresponding to the L CSI reporting configurations. For example, PCSIis the maximum value of Plfor all values ofl. For example, when the payload size of the CSI report corresponding to the first CSI reporting configuration is smaller than PCSI, the payload of the CSI report corresponding to the first CSI reporting configuration is zero padded. The payload of the CSI report corresponding to the first CSI reporting configuration will be zero padded until the payload size of the CSI report is equal to PCSI.

[0316] For example, . For example, , where Q represents a set including 1, 2, ..., L.

[0317] The method of determining the CSI field in the CSI report is discussed below. The CSI field may include at least one of the followings: a CRI / SSBRI field, an RSRP field, a first field, and a second field. Refer below for description of the first field and the second field.

[0318] Optionally, the number (for example, Nmax) of the CRI / SSBRI fields in the CSI report in the second uplink channel is determined based on the L CSI reporting configurations. Optionally, at least one CSI reporting configuration of the L CSI reporting configurations may indicate the number of the reported reference signal resources. Optionally, each CSI reporting configuration of the L CSI reporting configurations may indicate the number of the reported reference signal resources. Optionally, Nmaxis equal to the maximum value of the number of the reported reference signal resources indicated by each CSI reporting configuration of the L CSI reporting configurations. For example, the number of the reported reference signal resources corresponding to thel-th CSI reporting configuration of the L CSI reporting configurations is Nl. Here,lmay be an integer ranged from 1 to L, or 1 = 1, 2, ..., L, or the value oflmay be an integer ranged from 1 to L. Optionally, Nlrepresents the number of the reported reference signal resources corresponding to thel-th CSI reporting configuration. Optionally, Nlrepresents the number of the reported reference signal resources determined based on thel-th CSI reporting configuration. Optionally, Nmaxis the maximum value of the numbers of the reported reference signal resources respectively corresponding to the L CSI reporting configurations. For example, Nmaxis the maximum value of Nlfor all values ofl.

[0319] For example, . For example, , where Q represents a set including 1, 2, ..., L.

[0320] In the disclosure, the value oflcorresponding to the first CSI reporting configuration is m. The number of the reported reference signal resources corresponding to the first CSI reporting configuration is .

[0321] Optionally, the CSI report in the second uplink channel includes NmaxCRI / SSBRI fields. Optionally, CRI / SSBRI field#n refers to the n-th CRI / SSBRI field of the NmaxCRI / SSBRI fields. The order of the NmaxCRI / SSBRI fields is determined based on the order of UCI. Optionally, the NmaxCRI / SSBRI fields may be represented as CRI / SSBRI field#n, n = 1, 2, ..., Nmax. When n> , the information bits corresponding to CRI / SSBRI field#n are 0. The information bits corresponding to CRI field#n being 0 means that all the information bits corresponding to CRI field#n are 0, or the value of CRI field#n is 0. This method may allow the payload size corresponding to the CRI / SSBRI field remains unchanged no matter which CSI reporting configuration of the L CSI reporting configurations is selected by the UE as the first CSI reporting configuration, preventing demodulation failure due to different understanding of the number of the CRI / SSBRI fields by the UE and the base station and improving the reliability of the communication system.

[0322] Optionally, the number of the RSRP fields in the CSI report in the second uplink channel is determined based on the L CSI reporting configurations. In the disclosure, the RSRP field is used for indicating L1-RSRP. In the disclosure, the RSRP field is the L1-RSRP field. Optionally, the RSRP field is used for indicating absolute L1-RSRP, or the RSRP field is used for indicating differential L1-RSRP. Optionally, the number of the RSRP fields in the CSI report is equal to Nmax. Optionally, the NmaxRSRP fields may be represented as RSRP field#n, n = 1, 2, ..., Nmax. Optionally, the CRI / SSBRI fields correspond one-to-one to the RSRP fields. Optionally, CRI / SSBRI field#n corresponds to RSRP field#n. Optionally, RSRP field#n refers to the n-th CRI / SSBRI field of the NmaxRSRP fields. Optionally, the order of the NmaxRSRP fields is determined based on the order of UCI. For example, the measured L1-RSRP of the resource corresponding to CRI / SSBRI field#n corresponds to RSRP field#n. When n> , the information bits corresponding to RSRP field#n are 0. The information bits corresponding to RSRP field#n being 0 means that all the information bits corresponding to RSRP field#n are 0, or the value of RSRP field#n is 0. This method may allow the payload size corresponding to the RSRP field remains unchanged no matter which CSI reporting configuration of the L CSI reporting configurations is selected by the UE as the first CSI reporting configuration, preventing demodulation failure due to different understanding of the number of the RSRP fields by the UE and the base station and improving the reliability of the communication system.

[0323] Optionally, the number of the first fields in the CSI report in the second uplink channel is determined based on the L CSI reporting configurations. In the disclosure, the first field is used for indicating whether the corresponding CRI / SSBRI satisfies an event, or the first field is used for indicating whether the corresponding CRI / SSBRI satisfies the condition of the event. The event here may be the Type 1 event, the Type 2 event, or the Type 3 event. For example, the first field may indicate a first value (e.g., 1) or a second value (e.g., 0). The first value indicates that the corresponding CRI / SSBRI satisfies the condition of the event. The second value indicates that the corresponding CRI / SSBRI does not satisfy the condition of the event. Optionally, the number of the first fields in the CSI report is equal to Nmax. Optionally, the Nmaxfirst fields may be represented as first field#n, n = 1, 2, ..., Nmax. Optionally, the CRI / SSBRI fields correspond one-to-one to the first fields. Optionally, CRI / SSBRI field#n corresponds to first field#n. Optionally, the order of the Nmaxfirst fields is determined based on the order of the UCI. When n> , the information bits corresponding to first field#n are 0. The information bits corresponding to first field#n being 0 means that all the information bits corresponding to first field#n are 0, or the value of first field#n is 0. This method may allow the payload size corresponding to the first field remains unchanged no matter which CSI reporting configuration of the L CSI reporting configurations is selected by the UE as the first CSI reporting configuration, preventing demodulation failure due to different understanding of the number of the first fields by the UE and the base station and improving the reliability of the communication system.

[0324] Optionally, whether the second field exists in the CSI report in the second uplink channel is determined based on the L CSI reporting configurations. Optionally, the second field is the field of RSRP. Optionally, the second field may be represented as L1-RSRP#X. Optionally, the second field is used for indicating differential L1-RSRP. Optionally, the second field is the measured L1-RSRP used for indicating the reference signal associated with the indicated TCI state corresponding to the first CSI reporting configuration. Optionally, each CSI reporting configuration of the L CSI reporting configurations may indicate whether the current beam is always reported. Optionally, each CSI reporting configuration of the L CSI reporting configurations may include an enabling parameter indicating whether the current beam is reported (or always reported). When the enabling parameter indicates enable, the current beam corresponding to the CSI reporting configuration is reported. When the enabling parameter indicates disable (or, when the enabling parameter is not configured), the current beam corresponding to the CSI reporting configuration is not reported. Here, the current beam may be the reference signal associated with the indicated TCI state. The current beam being reported means that the L1-RSRP corresponding to the reference signal associated with the indicated TCI state is reported. The current beam being not reported means that the L1-RSRP corresponding to the reference signal associated with the indicated TCI state is not reported.

[0325] Optionally, if all CSI reporting configurations of the L CSI reporting configurations indicate that the current beam is not reported, the second field does not exist in the CSI report. Optionally, if one (or any one, or at least one) CSI reporting configuration of the L CSI reporting configurations indicates that the current beam is reported, the second field exists in the CSI report. Optionally, if one (or any one, or at least one) CSI reporting configuration of the L CSI reporting configurations indicates that the current beam is always reported, the second field exists in the CSI report. Optionally, if the first CSI reporting configuration indicates that the current beam is not reported, the information bits corresponding to the second field are 0. Optionally, if the first CSI reporting configuration indicates that the current beam is not reported and the second field exists, the information bits corresponding to the second field are 0. The information bits corresponding to the second field being 0 means that all the information bits corresponding to the second field are 0, or the value of the second field is 0. This method may allow the payload size corresponding to the second field remains unchanged no matter which CSI reporting configuration of the L CSI reporting configurations is selected by the UE as the first CSI reporting configuration, preventing demodulation failure due to different understanding of the second field by the UE and the base station and improving the reliability of the communication system.

[0326] Optionally, refer Table 6 below for the mapping order of the CSI fields in the CSI report. The UE may determine the CSI based on Table 6. Refer above for description of the CSI fields in the Table. Optionally, the order of the second field and the first fields may be interchanged. Optionally, RSRP#1 corresponds to absolute L1-RSRP. Optionally, RSRP#2 to RSRP#Nmaxcorrespond to differential L1-RSRP. Optionally, the second field corresponds to differential L1-RSRP. This method allows the UE and the base station to have the same understanding of the order of the CSI fields in the CSI report, preventing the UE from using the wrong order to generate UCI and improving the reliability of the communication system.

[0327]

[0328] Table 6. Mapping order of the CSI fields in the CSI report

[0329] 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 channel state information (CSI) reporting configuration; at 502, the base station receives a first uplink channel, wherein the first uplink channel is triggered based on the CSI reporting configuration; and at 503, the base station receives a second uplink channel associated with the first uplink channel, wherein the second uplink channel carries a differential L1-RSRP corresponding to a reference signal resource associated with an indicated transmission configuration indication (TCI) state, wherein the differential L1-RSRP is determined based on a first threshold, and the first threshold is predefined or indicated by the CSI reporting configuration.

[0330] 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.

[0331] 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.

[0332] Furthermore, "at least one of / at least one"described in the present disclosure includes any and / or all possible combinations of the listed items, and various embodiments and various examples of the embodiments described in the present disclosure may be changed and combined in any appropriate form, and " / " described in the present disclosure means "or".

[0333] The various illustrative logical blocks, modules, and circuits described in the present 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. The 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.

[0334] The steps of a method or algorithm described in this disclosure may be embodied directly in hardware, in a software module executed by a processor, or in a combination of both. 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 the processor may read information from, and write information to, the storage medium. In the alternative, the storage medium may be integrated 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.

[0335] 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 in computer-readable media or transmitted over computer-readable media as one or more instructions or code. 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 may be accessed by a general purpose or special purpose computer.

[0336] 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.

[0337] 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 may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may 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 may in some cases be deleted from the combination, and the claimed combination may be directed to a subcombination or variation of the subcombination.

[0338] It is to be understood that the specific order or hierarchy of steps in the methods of the present disclosure is an illustration of exemplary processes. Based on 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 in the present disclosure. The accompanying method claims present elements of the various steps in an example 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 form 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 function described herein are included in aspects of the disclosure.

[0339] The text and drawings are provided as examples only to aid the reader in understanding the present disclosure. They are not intended, nor should they be construed, to limit the scope of the disclosure in any way. Although certain embodiments and examples have been provided, it will be apparent to those skilled in the art, based on this disclosure, that changes may be made to the embodiments and examples shown without departing from the scope of the disclosure.

Claims

1.A method performed by a user equipment (UE) in a wireless communication system, the method comprising:receiving a channel state information (CSI) reporting configuration regarding a UE initiated reporting for a reference signal resource set, wherein the CSI reporting configuration includes a parameter associated with an event type set to event 1;in case that an event instance is determined based on layer 1-reference signal received power (L1-RSRP) of a first reference signal associated with an indicated transmission configuration indicator (TCI) state being lower than a threshold, transmitting a first uplink (UL) channel;after transmitting the first UL channel, transmitting, on a second UL channel, a CSI report including a first absolute L1-RSRP of the first reference signal associated with the indicated TCI state and a second absolute L1-RSRP of a second reference signal in the reference signal resource set.2.The method of claim 1,wherein the indicated TCI state is applied to a first component carrier (CC),wherein in case that a first parameter is configured in the CSI reporting configuration, the first CC is indicated by the first parameter, andin case that the first parameter is not configured in the CSI reporting configuration, the first CC is same as a CC of the CSI reporting configuration.3.The method of claim 1,wherein the threshold indicated by a second parameter in the CSI reporting configuration is configured based on values from 16 to 113.4.The method of claim 3,wherein the second parameter is an integer.5.The method of claim 1,wherein the CSI report includes N CSI-RS resource indicator (CRI) or N synchronization signal (SS) / physical broadcast channel (PBCH) block resource indicator (SSBRI) corresponding to at least one reference signal in the reference signal resource set.6.The method of claim 5,wherein the CSI report includes an absolute L1-RSRP or a differential L1-RSRP for each of the N CRI or the N SSBRI.7.The method of claim 1,wherein the first reference signal associated with the indicated TCI state is a reference signal of the indicated TCI state or SS / PBCH block which is quasi-co-located with the reference signal of the indicated TCI state.8.The method of claim 1,wherein the indicated TCI state is associated with a dl-OrJointTCI-StateList.9.A method performed by a base station in a wireless communication system, the method comprising:transmitting a channel state information (CSI) reporting configuration regarding a user equipment (UE) initiated reporting for a reference signal resource set, wherein the CSI reporting configuration includes a parameter associated with an event type set to event 1;in case that an event instance is determined based on layer 1-reference signal received power (L1-RSRP) of a first reference signal associated with an indicated transmission configuration indicator (TCI) state being lower than a threshold, receiving, from a UE, a first uplink (UL) channel; andafter receiving the first UL channel, receiving, on a second UL channel, a CSI report including a first absolute L1-RSRP of the first reference signal associated with the indicated TCI state and a second absolute L1-RSRP of a second reference signal in the reference signal resource set.10.A user equipment (UE) in a wireless communication system, the UE comprising:a transceiver; andat least one processor coupled with the transceiver and configured to:receive a channel state information (CSI) reporting configuration regarding a UE initiated reporting for a reference signal resource set, wherein the CSI reporting configuration includes a parameter associated with an event type set to event 1,in case that an event instance is determined based on layer 1-reference signal received power (L1-RSRP) of a first reference signal associated with an indicated transmission configuration indicator (TCI) state being lower than a threshold, transmit a first uplink (UL) channel, andafter transmitting the first UL channel, transmit, on a second UL channel, a CSI report including a first absolute L1-RSRP of the first reference signal associated with the indicated TCI state and a second absolute L1-RSRP of a second reference signal in the reference signal resource set.11.The UE of claim 10,wherein the indicated TCI state is applied to a first component carrier (CC),wherein in case that a first parameter is configured in the CSI reporting configuration, the first CC is indicated by the first parameter, andin case that the first parameter is not configured in the CSI reporting configuration, the first CC is same as a CC of the CSI reporting configuration.12.The UE of claim 10,wherein the threshold indicated by a second parameter in the CSI reporting configuration is configured based on values from 16 to 113.13.The UE of claim 10,wherein the CSI report includes N CSI-RS resource indicator (CRI) or N synchronization signal (SS) / physical broadcast channel (PBCH) block resource indicator (SSBRI) corresponding to at least one reference signal in the reference signal resource set.14.The UE of claim 10,wherein the first reference signal associated with the indicated TCI state is a reference signal of the indicated TCI state or SS / PBCH block which is quasi-co-located with the reference signal of the indicated TCI state.15.A base station in a wireless communication system, the base station comprising:a transceiver; andat least one processor coupled with the transceiver and configured to:transmit a channel state information (CSI) reporting configuration regarding a user equipment (UE) initiated reporting for a reference signal resource set, wherein the CSI reporting configuration includes a parameter associated with an event type set to event 1,in case that an event instance is determined based on layer 1-reference signal received power (L1-RSRP) of a first reference signal associated with an indicated transmission configuration indicator (TCI) state being lower than a threshold, receive, from a UE, a first uplink (UL) channel, andafter receiving the first UL channel, receive, on a second UL channel, a CSI report including a first absolute L1-RSRP of the first reference signal associated with the indicated TCI state and a second absolute L1-RSRP of a second reference signal in the reference signal resource set.

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