Method and device for receiving and transmitting information

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The disclosure provides a method performed by a user equipment (UE) in a wireless communication system, which includes receiving a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration is configured with a resource set including K resources; determining and / or reporting CSI associated with each of N resources in the resource set in case that a report quantity parameter included in the CSI reporting configuration includes at least a rank indicator (RI), wherein K and N are integers greater than 1, and K≥N.

Description

METHOD AND DEVICE FOR RECEIVING AND TRANSMITTING INFORMATION

[0001] The present application relates to the technical field of wireless communication, and more specifically, to a method and device for receiving and transmitting information.

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

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

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

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

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

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

[0008] In order to enhance the scheduling efficiency of the 5G wireless communication system, the base station needs to obtain channel state information (CSI) to schedule according to the CSI fed back by the terminal equipment. However, how to further enhance the performance of CSI reporting is a problem to be solved.

[0009] An aspect of the present 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, wherein the CSI reporting configuration is configured with a resource set including K resources; determining and / or reporting CSI associated with each resource of N resources in the resource set in case that a report quantity parameter included in the CSI reporting configuration includes at least a rank indicator RI, where K and N are integers greater than 1, and K홐.

[0010] In an example, N is determined based on the CSI reporting configuration; or N is determined by the UE; or N is predefined.

[0011] In an example, the resource set is associated with N subsets, the N resources are selected by the UE from the N subsets, respectively, wherein the N subsets are configured through the CSI reporting configuration, and the N resources are one-to-one mapped with the N subsets.

[0012] In an example, the CSI reporting configuration includes information for resource restriction, and wherein the information for resource restriction indicates a combination of N resources that the UE is allowed to report, or indicates a combination of N resources that the UE is not allowed to report.

[0013] In an example, the N resources are selected from the resource set or the N subsets based on CSI associated with the N resources, respectively.

[0014] In an example, when N is equal to K, the CSI associated with the N resources do not include a channel state information reference signal resource indicator CRI, or the CRI included in the CSI associated with the N resources is not reported; and / or when N < K, the CSI associated with the N resources include the CRI, or the CRI included in the CSI associated with the N resources is reported.

[0015] In an example, an order of the CSI associated with the N resources is determined based on at least one of the followings: an order of the N resources; an order of the N subsets; an order of types of the CSI associated with the N resources; an order of values of the CSI associated with the N resources; an order of priorities associated with the N resources; an order of sub-reports associated with the N resources; an order of subband numbers or indexes of the CSI associated with the N resources.

[0016] In an example, in case that the CSI associated with the N resources include a subband CSI of CSI part 2, an order of the subband CSI of CSI part 2 includes: CSI of all even subbands in the CSI associated with the N resources first, then CSI of odd subbands in the CSI associated with the N resources, wherein an order of the CSI in the CSI of the even subbands and the CSI in the odd subbands is determined based on at least one of the followings: the order of the N resources; the order of the N subsets; the order of the priorities associated with the N resources; the order of the sub-reports associated with the N resources.

[0017] In an example, the order of the N resources is determined based on at least one of the followings: values of CRIs associated with the N resources; resource IDs associated with the N resources; positions of the N resources in the resource set.

[0018] In an example, the order of the N subsets is determined based on at least one of the followings: ID of the subset; an order of configuration information corresponding to the subset in the CSI reporting configuration.

[0019] In an example, the priorities associated with the N resources are determined based on at least one of the followings: values of the CRIs associated with the N resources; resource IDs associated with N resources; positions of the N resources in the resource set; UE capability.

[0020] In an example, the UE capability includes a first capability parameter for indicating a maximum number of resources for a type-I single-panel codebook in the resource set and / or a second capability parameter for indicating a maximum number of resources for a type-I multi-panel codebook in the resource set, and wherein the priorities associated with the N resources are determined based on one of the first capability parameter, the second capability parameter, the larger value between the first capability parameter and the second capability parameter.

[0021] In an example, the method further includes: for CSI in CSI part 2 in the CSI associated with the N resources, performing CSI omission at resource level based on the priorities associated with the N resources; or for the subband CSI of CSI part 2 in the CSI associated with the N resources, performing CSI omission at resource level based on the priorities associated with the N resources.

[0022] In an example, the method further includes: when the UE multiplexes CSI reports including the CSI associated with each resource of the N resources on physical uplink control channel PUCCH resource, determining a number of physical resource blocks PRBs associated with PUCCH resource and / or PUCCH resource, or determining a number of CSI part 2 included in the CSI reports based on an assumption that RI associated with each resource of the N resources indicate a predefined rank.

[0023] In an example, the method further includes in case that the UE multiplexes CSI reports including the CSI associated with each resource of the N resources on PUCCH resource and the N is determined by the UE, determining the number of PRBs associated with PUCCH resource and / or PUCCH resource or determining the number of CSI part 2 included in the CSI reports based on the assumption that N is a predefined value or N is K.

[0024] In an example, the method further includes: the CSI reports are transmitted when a fifth condition is satisfied, wherein the fifth condition includes at least one of the followings: after the CSI reporting configuration; after a CSI reporting reconfiguration; after serving cell activation; after a bandwidth part BWP change; after activation of semi-persistent CSI; receiving at least one CSI reference signal CSI-RS transmission occasion for channel measurement no later than CSI reference resources and / or one CSI-RS for interference measurement and / or CSI interference measurement CSI-IM occasion, wherein the CSI-RS transmission occasion is for Y resources in the resource set, where Y is equal to N.

[0025] In an example, when cell discontinuous transmission DTX of a serving cell where a CSI resource setting associated with the CSI reporting configuration is located is activated, the CSI-RS transmission occasion is a CSI-RS transmission occasion within cell DTX active time, and / or the CSI-IM occasion is a CSI-IM occasion within the cell DTX active time; and / or when the cell DTX of the serving cell where the CSI resource setting associated with the CSI reporting configuration is located is activated, the Y resources are semi-persistent resources or periodic resources.

[0026] In an example, the CSI includes at least one of RI, channel quality, channel quality indicator CQI, precoding matrix indicator PMI, layer 1- reference signal received power L1-RSRP, layer 1- signal to noise and interference ratio L1-SINR, and layer 1 LI.

[0027] Another aspect of the present 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, wherein the CSI reporting configuration is configured with a resource set including K resources; receiving CSI associated with each of N resources in the resource set in case that a report quantity parameter included in the CSI reporting configuration includes at least a rank indicator RI, where K and N are integers greater than 1, and K홐.

[0028] In an example, N is determined based on the CSI reporting configuration; or N is determined by the UE; or N is predefined.

[0029] In an example, the resource set is associated with N subsets, the N resources are selected by the UE from the N subsets, respectively, wherein the N subsets are configured through the CSI reporting configuration, and the N resources are one-to-one mapped with the N subsets.

[0030] In an example, the CSI reporting configuration includes information for resource restriction, and wherein the information for resource restriction indicates a combination of N resources that the UE is allowed to report, or indicates a combination of N resources that the UE is not allowed to report.

[0031] In an example, the N resources are selected from the resource set or the N subsets based on CSI associated with the N resources, respectively.

[0032] In an example, when N is equal to K, the CSI associated with the N resources do not include a channel state information reference signal resource indicator CRI, or the CRI included in the CSI associated with the N resources is not reported; and / or when N < K, the CSI associated with the N resources include the CRI, or the CRI included in the CSI associated with the N resources is reported.

[0033] In an example, an order of the CSI associated with the N resources is determined based on at least one of the followings: an order of the N resources; an order of the N subsets; an order of types of the CSI associated with the N resources; an order of values of the CSI associated with the N resources; an order of priorities associated with the N resources; an order of sub-reports associated with the N resources; an order of subband numbers or indexes of the CSI associated with the N resources.

[0034] In an example, in case that the CSI associated with the N resources include a subband CSI of CSI part 2, an order of the subband CSI of CSI part 2 includes: CSI of all even subbands in the CSI associated with the N resources first, then CSI of odd subbands in the CSI associated with the N resources, wherein an order of the CSI in the CSI of the even subbands and the CSI in the odd subbands is determined based on at least one of the followings: the order of the N resources; the order of the N subsets; the order of the priorities associated with the N resources; the order of the sub-reports associated with the N resources.

[0035] In an example, the order of the N resources is determined based on at least one of the followings: values of CRIs associated with the N resources; resource IDs associated with the N resources; positions of the N resources in the resource set.

[0036] In an example, the order of the N subsets is determined based on at least one of the followings: ID of the subset; an order of configuration information corresponding to the subset in the CSI reporting configuration.

[0037] In an example, the priorities associated with the N resources are determined based on at least one of the followings: values of the CRIs associated with the N resources; resource IDs associated with N resources; positions of the N resources in the resource set; UE capability.

[0038] In an example, the UE capability includes a first capability parameter for indicating a maximum number of resources for a type-I single-panel codebook in the resource set and / or a second capability parameter for indicating a maximum number of resources for a type-I multi-panel codebook in the resource set, and wherein the priorities associated with the N resources are determined based on one of the first capability parameter, the second capability parameter, the larger value between the first capability parameter and the second capability parameter.

[0039] In an example, for CSI in CSI part 2 in the CSI associated with the N resources, CSI omission is performed at resource level based on the priorities associated with the N resources; or for the subband CSI of CSI part 2 in the CSI associated with the N resources, CSI omission is performed at resource level based on the priorities associated with the N resources.

[0040] In an example, when CSI reports including the CSI associated with each resource of the N resources are multiplexed on physical uplink control channel PUCCH resource, determining a number of physical resource blocks PRBs associated with PUCCH resource and / or PUCCH resource, or determining a number of CSI part 2 included in the CSI reports is based on an assumption that RI associated with each resource of the N resources indicate a predefined rank.

[0041] In an example, in case that CSI report including CSI associated with each resource of N resources are multiplexed on PUCCH resource and the N is determined by the UE, determining the number of PRBs associated with PUCCH resource and / or PUCCH resource or determining the number of CSI part 2 included in the CSI reports is based on the assumption that N is a predefined value or N is K.

[0042] In an example, the CSI reports are transmitted when a fifth condition is satisfied, wherein the fifth condition includes at least one of the followings: after the CSI reporting configuration; after a CSI reporting reconfiguration; after serving cell activation; after a bandwidth part BWP change; after activation of semi-persistent CSI; receiving at least one CSI reference signal CSI-RS transmission occasion for channel measurement no later than CSI reference resources and / or one CSI-RS for interference measurement and / or CSI interference measurement CSI-IM occasion, wherein the CSI-RS transmission occasion is for Y resources in the resource set, where Y is equal to N.

[0043] In an example, when cell discontinuous transmission DTX of a serving cell where a CSI resource setting associated with the CSI reporting configuration is located is activated, the CSI-RS transmission occasion is a CSI-RS transmission occasion within cell DTX active time, and / or the CSI-IM occasion is a CSI-IM occasion within the cell DTX active time; and / or when the cell DTX of the serving cell where the CSI resource setting associated with the CSI reporting configuration is located is activated, the Y resources are semi-persistent resources or periodic resources.

[0044] In an example, the CSI includes at least one of RI, channel quality, channel quality indicator CQI, precoding matrix indicator PMI, layer 1- reference signal received power L1-RSRP, layer 1- signal to noise and interference ratio L1-SINR, and layer 1 LI.

[0045] Another aspect of the present disclosure provides a user equipment including a transceiver and a controller coupled to the transceiver, the controller is configured to perform the aforementioned method that may be performed by the user equipment.

[0046] Yet another aspect of the present disclosure provides a base station including a transceiver and a controller coupled to the transceiver, the controller is configured to perform the aforementioned method that may be performed by the base station.

[0047] The method provided by the present disclosure may improve the performance of CSI, and further improve the scheduling efficiency of the communication system.

[0048] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0049] FIG. 1 illustrates an overall structure of an example wireless communication network according to various embodiments of the present disclosure;

[0050] FIGS. 2a and 2b respectively illustrate a transmission path 200 and a reception path 250 in a wireless communication network according to various embodiments of the present disclosure;

[0051] FIGS. 3a and 3b respectively illustrate the structures of a user equipment (UE) and a base station in a wireless communication network according to various embodiments of the present disclosure;

[0052] FIG. 4 illustrates a method 400 performed by a user equipment (UE) according to various embodiments of the present disclosure;

[0053] FIG. 5 illustrates a method 500 performed by a base station according to various embodiments of the present disclosure;

[0054] FIG. 6 illustrates a structure 600 of a user equipment according to various embodiments of the present disclosure;

[0055] FIG. 7 illustrates a structure 700 of a base station according to various embodiments of the present disclosure.

[0056] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that in the drawings, the same or similar elements are denoted by the same or similar reference numerals as far as possible. In addition, detailed descriptions of known functions or Configurations that may make the subject matter of the present disclosure unclear will be omitted.

[0057] When describing the embodiments of the present disclosure, descriptions related to technical content that are well known in the field and not directly related to the present disclosure will be omitted. This unnecessary description is omitted to prevent the main idea of the present disclosure from being blurred and to convey the main idea more clearly.

[0058] For the same reason, some elements may be exaggerated, omitted or schematically shown in the drawings. In addition, the size of each component does not fully reflect the actual size. In the drawings, the same or corresponding elements have the same reference numerals.

[0059] Advantages and features of the present disclosure and ways to achieve them will become clear with reference to the embodiments described in detail below in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments set forth below, but can be realized in various forms. The following examples are provided only to fully disclose this disclosure and to inform those skilled in the art of its scope, and this disclosure is only limited by the scope of the appended claims. Throughout this specification, the same or similar reference numerals indicate the same or similar elements.

[0060] 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".

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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. 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".

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] FIG. 1 illustrates an example wireless network 100 according to embodiments of the present disclosure. The embodiment of the wireless network 100 shown in FIG. 1 is for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of the present disclosure.

[0070] The wireless network 100 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) network 130, such as the Internet, a private IP network, or other data networks.

[0071] Depending on a type of the network, other well-known terms such as "base station" or "access point" can be used instead of "gNodeB" or "gNB". For convenience, the terms "gNodeB" and "gNB" are used in this patent document to refer to network infrastructure components that provide wireless access for remote terminals. And, depending on the type of the network, other well-known terms such as "mobile station", "user station", "remote terminal", "wireless terminal" or "user apparatus" can be used instead of "user equipment" or "UE". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to remote wireless devices that wirelessly access the gNB, no matter whether the UE is a mobile device (such as a mobile phone or a smart phone) or a fixed device (such as a desktop computer or a vending machine).

[0072] gNB 102 provides wireless broadband access to the network 130 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 network 130 for a second plurality of UEs within a coverage area 125 of gNB 103. The second plurality of UEs include a UE 115 and a UE 116. In some embodiments, one or more of gNBs 101-103 can communicate with each other and with UEs 111-116 using 5G, Long Term Evolution (LTE), LTE-A, WiMAX or other advanced wireless communication technologies.

[0073] 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.

[0074] 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 present 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.

[0075] Although FIG. 1 illustrates an example of the wireless network 100, various changes can be made to FIG. 1. The wireless network 100 can include any number of gNBs and any number of UEs in any suitable arrangement, for example. Furthermore, gNB 101 can directly communicate with any number of UEs and provide wireless broadband access to the network 130 for those UEs. Similarly, each gNB 102-103 can directly communicate with the network 130 and provide direct wireless broadband access to the network 130 for the UEs. In addition, gNB 101, 102 and / or 103 can provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0076] FIGS. 2a and 2b illustrate example wireless transmission and reception paths according to the present disclosure. In the following description, the transmission path 200 can be described as being implemented in a gNB, such as gNB 102, and the reception path 250 can be described as being implemented in a UE, such as UE 116. However, it should be understood that the reception path 250 can be implemented in a gNB and the transmission path 200 can be implemented in a UE. In some embodiments, the reception path 250 is configured to support codebook designs and structures for systems with 2D antenna arrays as described in embodiments of the present disclosure.

[0077] 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.

[0078] 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 can also be filtered at a baseband before switching to the RF frequency.

[0079] 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.

[0080] 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.

[0081] Each of the components in FIGS. 2a and 2b can be implemented using only hardware, or using a combination of hardware and software / firmware. As a specific example, at least some of the components in FIGS. 2a and 2b may be implemented in software, while other components may be implemented in Configurable hardware or a combination of software and Configurable hardware. For example, the FFT 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.

[0082] Furthermore, although described as using FFT and IFFT, this is only illustrative and should not be interpreted as limiting the scope of the present disclosure. Other types of transforms can be used, such as Discrete Fourier transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions. It should be understood that for DFT and IDFT functions, the value of variable N may be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N may be any integer which is a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0083] Although FIGS. 2a and 2b illustrate examples of wireless transmission and reception paths, various changes may be made to FIGS. 2a and 2b. For example, various components in FIGS. 2a and 2b can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. Furthermore, FIGS. 2a and 2b are intended to illustrate examples of types of transmission and reception paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communication in a wireless network.

[0084] FIG. 3a illustrates an example UE 116 according to the present disclosure. The embodiment of UE 116 shown in FIG. 3a is for illustration only, and UEs 111-115 of FIG. 1 can have the same or similar Configuration. However, a UE has various Configurations, and FIG. 3a does not limit the scope of the present disclosure to any specific implementation of the UE.

[0085] 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.

[0086] The RF transceiver 302 receives an incoming RF signal transmitted by a gNB of the wireless network 100 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).

[0087] 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.

[0088] The controller / processor 307 can include one or more processors or other processing devices and execute an OS 312 stored in the memory 311 in order to control the overall operation of UE 116. For example, the controller / processor 307 can control the reception of forward channel signals and the transmission of backward channel signals through the RF transceiver 302, the RX processing circuit 305 and the TX processing circuit 303 according to well-known principles. In some embodiments, the controller / processor 307 includes at least one microprocessor or microcontroller.

[0089] 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 present disclosure. The controller / processor 307 can move data into or out of the memory 311 as required by an execution process. In some embodiments, the controller / processor 307 is configured to execute the application 313 based on the OS 312 or in response to signals received from the gNB or the operator. The controller / processor 307 is also coupled to an I / O interface 308, where the I / O interface 308 provides UE 116 with the ability to connect to other devices such as laptop computers and handheld computers. I / O interface 308 is a communication path between these accessories and the controller / processor 307.

[0090] The controller / processor 307 is also coupled to the input device(s) 309 and the display 310. An operator of UE 116 can input data into UE 116 using the input device(s) 309. The display 310 may be a liquid crystal display or other display capable of presenting text and / or at least limited graphics (such as from a website). The memory 311 is coupled to the controller / processor 307. A part of the memory 311 can include a random access memory (RAM), while another part of the memory 311 can include a flash memory or other read-only memory (ROM).

[0091] Although FIG. 3a illustrates an example of UE 116, various changes can be made to FIG. 3a. For example, various components in FIG. 3a can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. As a specific example, the controller / processor 307 can be divided into a plurality of processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Furthermore, although FIG. 3a illustrates that the UE 116 is configured as a mobile phone or a smart phone, UEs can be Configured to operate as other types of mobile or fixed devices.

[0092] FIG. 3b illustrates an example gNB 102 according to the present disclosure. The embodiment of gNB 102 shown in FIG. 3b is for illustration only, and other gNBs of FIG. 1 can have the same or similar Configuration. However, a gNB has various Configurations, and FIG. 3b does not limit the scope of the present disclosure to any specific implementation of a gNB. It should be noted that gNB 101 and gNB 103 can include the same or similar structures as gNB 102.

[0093] 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.

[0094] RF transceivers 372a-372n receive an incoming RF signal from antennas 370a-370n, such as a signal transmitted by the 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.

[0095] 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.

[0096] The controller / processor 378 can include one or more processors or other processing devices that control the overall operation of gNB 102. For example, the controller / processor 378 can control the reception of forward channel signals and the transmission of backward channel signals through the RF transceivers 372a-372n, the RX processing circuit 376 and the TX processing circuit 374 according to well-known principles. The controller / processor 378 can also support additional functions, such as higher-level wireless communication functions. For example, the controller / processor 378 can perform a Blind Interference Sensing (BIS) process such as that performed through a BIS algorithm, and decode a received signal from which an interference signal is subtracted. A controller / processor 378 may support any of a variety of other functions in gNB 102. In some embodiments, the controller / processor 378 includes at least one microprocessor or microcontroller.

[0097] The controller / processor 378 is also capable of executing programs and other processes residing in the memory 380, such as a basic OS. The controller / processor 378 can also support channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. In some embodiments, the controller / processor 378 supports communication between entities such as web RTCs. The controller / processor 378 can move data into or out of the memory 380 as required by an execution process.

[0098] The controller / processor 378 is also coupled to the backhaul or network interface 382. The backhaul or network interface 382 allows gNB 102 to communicate with other devices or systems through a backhaul connection or through a network. The backhaul or network interface 382 can support communication over any suitable wired or wireless connection(s). For example, when gNB 102 is implemented as a part of a cellular communication system, such as a cellular communication system supporting 5G or new radio access technology or NR, LTE or LTE-A, the backhaul or network interface 382 can allow gNB 102 to communicate with other gNBs through wired or wireless backhaul connections. When gNB 102 is implemented as an access point, the backhaul or network interface 382 can allow gNB 102 to communicate with a larger network, such as the Internet, through a wired or wireless local area network or through a wired or wireless connection. The backhaul or network interface 382 includes any suitable structure that supports communication through a wired or wireless connection, such as an Ethernet or an RF transceiver.

[0099] The memory 380 is coupled to the controller / processor 378. A part of the memory 380 can include an RAM, while another part of the memory 380 can include a flash memory or other ROMs. In certain embodiments, a plurality of instructions, such as the BIS algorithm, are stored in the memory. The plurality of instructions are Configured to cause the controller / processor 378 to execute the BIS process and decode the received signal after subtracting at least one interference signal determined by the BIS algorithm.

[0100] 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.

[0101] Although FIG. 3b illustrates an example of gNB 102, various changes may be made to FIG. 3b. For example, gNB 102 can include any number of each component shown in FIG. 3a. As a specific example, the access point can include many backhaul or network interfaces 382, and the controller / processor 378 can support routing functions to route data between different network addresses. As another specific example, although shown as including a single instance of the TX processing circuit 374 and a single instance of the RX processing circuit 376, gNB 102 can include multiple instances of each (such as one for each RF transceiver).

[0102] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0103] In the present application, the term "CSI reporting configuration" may be used interchangeably with the terms "CSI reporting configuration information" and "information for CSI reporting configuration" and "information for configuring CSI report". In the present application, the term "CSI" may be used interchangeably with the terms "CSI parameter" or "CSI quantity". In the present application, the term "mapping order of CSI" may be used interchangeably with the term "order of CSI" or "order of CSI information bits" or "order of CSI fields". In the present application, the term "CSI transmission occasion" may be used interchangeably with the term "CSI reference signal (CSI-RS) occasion". In the present application, the term "CSI interference measurement (CSI-IM) occasion" may be used interchangeably with the term "CSI-IM transmission occasion". In the present application, the term "UE capability" may be used interchangeably with the terms "UE capability parameter" or "reported UE capability" or "reported UE capability parameter" or "UE capability signaling". In the present application, the term "information field corresponding to PMI" may be used interchangeably with the term "PMI information field". In the present application, "CSI resource setting associated with CSI reporting configuration" may be interchanged with the terms "CSI resource setting corresponding to CSI reporting configuration" or "resource associated with CSI reporting configuration" or "measurement associated with CSI reporting configuration" or "measurement resource associated with CSI reporting configuration" or "resource for channel measurement and / or interference measurement associated with CSI reporting configuration" or "resource for channel measurement associated with CSI reporting configuration". The CSI may include at least one of the followings:

[0104] ● CSI-RS Resource Indicator (CRI);

[0105] ● Rank Indicator (RI);

[0106] ● Precoding Matrix Indicator (PMI);

[0107] ● Channel quality indicator (CQI);

[0108] ● Layer indicator (LI);

[0109] ● Synchronization Signal / Physical Boardcast Channel (SSB) Block Resource indicator (SSBRI);

[0110] ● Layer 1- Reference Signal Received Power (L1-RSRP);

[0111] ● Layer 1- Signal to Interference and Noise Ratio (L1-SINR);

[0112] ● CapabilityIndex.

[0113] FIG. 4 illustrates a method 400 performed by a user equipment (UE) according to various embodiments of the present disclosure. The method 400 includes: at 401, the UE receives a CSI reporting configuration, which is associated with / corresponding to or configured with a resource set including K resources; at 402, when the CSI associated with / corresponding to the CSI reporting configuration includes RI, the UE determines and / or reports the CSI associated with each of N different resources in the resource set, where N헗.

[0114] Specifically, the UE receives the CSI reporting configuration (e.g., CSI-ReportConfig). Optionally, the CSI reporting configuration information may be associated with / corresponding to a CSI resource setting. Optionally, a CSI resource setting (e.g., CSI-ResourceConfig) may be associated with / corresponding to the CSI resource setting. Optionally, the CSI reporting configuration information may indicate / be configured with / be associated with resource set(s). Optionally, a resource set (or each resource set in the plurality of resource sets) includes one or more resources. Optionally, the resource set includes at least one of CSI-RS resources, SSB resources and CSI-IM resources. Optionally, the CSI-RS resource may be a non-zero power (NZP) CSI-RS. Optionally, the CSI reporting configuration information may indicate / be configured with / be associated with at least one of the followings:

[0115] ● Resource set for channel measurement. The resource set includes one or more resources. Optionally, the resource set may be configured by a higher-layer parameter NZP-CSI-RS-ResourceSet, wherein the parameter includes configuration information for one or more resources. The resource may be a CSI-RS resource and / or an SSB resource. The number of resources included in the resource set is K. Optionally, the number of all resources included in the resource set is K. Optionally, K ≥ 1 or K > 1 or K ≥ 2.

[0116] ● Resource set for interference measurement. The resource set includes one or more resources. The resource may be a CSI-RS resource and / or a CSI-IM resource. The number of resources included in the resource set is K_IM. Optionally, K_IM > 1, or K_IM ≥ 2. Optionally, the number of resources in the resource set for interference measurement is determined based on the number of resources in the resource set for channel measurement. Optionally, the number of resources in the resource set for interference measurement is greater than or equal to the number of resources in the resource set for channel measurement. For example, K_IM = K.

[0117] Optionally, the resources in the resource set for channel measurement and the resources in the resource set for interference measurement are mapped / associated one-to-one. For example, if interference measurement is performed on CSI-IM, each resource for channel measurement (e.g., CSI-RS resource) is associated with an interference measurement resource (e.g., CSI-IM resource). For example, if interference measurement is performed on CSI-IM, each resource (e.g., CSI-RS resource) for channel measurement is resource-wise associated with a resource (e.g., CSI-IM resource) by the ordering of the CSI-RS resource and CSI-IM resource in the corresponding resource sets. For example, the resource set for channel measurement includes {CSI-RS#1, CSI-RS#2, CSI-RS#3, CSI-RS #4}; the resource set for interference measurement includes {CSI-IM#1, CSI-IM#2, CSI-IM#3, CSI-IM#4}, then CSI-RS#1 is associated with CSI-IM#1; CSI-RS#2 is associated with CSI-IM#2; CSI-RS#3 is associated with CSI-IM#3; CSI-RS#4 is associated with CSI-IM#4. The UE may determine the CSI based on the measurement of the resources for channel measurement and the measurement of the associated resources for interference measurement, so as to determine the CSI associated with the resources for channel measurement and / or the resources for interference measurement.

[0118] Optionally, the UE determines and / or reports the CSI associated with / corresponding to the CSI reporting configuration. Optionally, the UE determines and / or reports the CSI associated with resource(s) in the resource set associated with / corresponding to the CSI reporting configuration. Optionally, the UE determines and / or reports the CSI associated with N resources in the resource set associated with / corresponding to the CSI reporting configuration. Optionally, the UE determines and / or reports the CSI associated with each resource of N resources in the resource set associated with / corresponding to the CSI reporting configuration. Optionally, N ≥ 1, or N > 1; or N ≥ 2. Optionally, N ≤ K. Optionally, the CSI associated with N resources includes N CRIs and / or CSI associated with / corresponding to N CRIs (or CSI associated with each CRI in N CRIs). Optionally, CSI associated with each of N resources includes: CRI and / or CSI associated with / corresponding to the CRI. Optionally, N resources may be N different resources, for example, N different resources in K resources. Optionally, N CRIs may be N different CRIs. Optionally, the CSI corresponding to one / each resource (of N resources) includes at least one of CRI, RI, PMI, CQI and LI. Optionally, the CSI corresponding to / associated with one / each CRI (of N CRIs) includes at least one of RI, PMI, CQI and LI. Optionally, the CSI is in a report instance. For example, the CSI associated with N resources is (reported) in a report instance. For example, N CRIs and / or the CSI associated with N CRIs are (reported) in a report instance.

[0119] Optionally, the CSI (e.g., the CSI associated with resources in the resource set, or the CSI associated with N resources, or the CSI associated with each of N resources or the CSI associated with N CRIs) may include at least RI. In the embodiment, "CSI includes at least RI" may be used interchangeably with "report quantity parameter corresponding to the CSI reporting configuration (or report quantity parameter with which the CSI reporting configuration is configured) may include at least 'RI'". Optionally, the report quantity parameter (e.g., reportQuantity) corresponding to the CSI reporting configuration (or report quantity parameter with which the CSI reporting configuration is configured) may include at least 'RI'. For example, the report quantity parameter (e.g., reportQuantity) corresponding to the CSI reporting configuration (or report quantity parameter with which the CSI reporting configuration is configured) is set to at least one of 'cri-RI-PMI-CQI', 'cri-RI-LI-PMI-CQI', 'cri-RI-i1', 'cri-RI-i1-CQI', 'cri-RI-CQI'. For example, the report quantity parameter (e.g., reportQuantity) corresponding to the CSI reporting configuration (or report quantity parameter with which the CSI reporting configuration is configured) is set to at least one of 'cri-RI-PMI-CQI', 'cri-RI-LI-PMI-CQI', 'cri-RI-i1-CQI', 'cri-RI-CQI'. Optionally, in the disclosure, CSI determination and / or CSI reporting associated with CSI reporting configuration is performed when a first condition (associated with CSI reporting configuration) is satisfied, and the first condition includes at least one of the followings:

[0120] ● the report quantity parameter corresponding to the CSI reporting configuration (or report quantity parameter with which the CSI reporting configuration is configured) includes at least 'RI';

[0121] ● the report quantity parameter (e.g., reportQuantity) corresponding to the CSI reporting configuration (or report quantity parameter with which the CSI reporting configuration is configured) is set to at least one of 'cri-RI-PMI-CQI', 'cri-RI-LI-PMI-CQI', 'cri-RI-i1', 'cri-RI-i1-CQI', 'cri-RI-CQI'.

[0122] ● the report quantity parameter (e.g., reportQuantity) corresponding to the CSI reporting configuration (or report quantity parameter with which the CSI reporting configuration is configured) is set to at least one of 'cri-RI-PMI-CQI', 'cri-RI-LI-PMI-CQI', 'cri-RI-i1-CQI', 'cri-RI-CQI'.

[0123] In the disclosure, "the first condition is satisfied" may be used interchangeably with "CSI includes at least RI".

[0124] A method for determining the number of the reported resources (or a method for determining the number of reported CRIs or a method for determining N) is described further below. Optionally, N refers to the number of resources corresponding to the reported CSI. Optionally, N refers to the number of (different) resources corresponding to the reported CSI (from K resources). Optionally, N refers to the number of the reported resources for measurement (from K resources). Take the number of the reported resources being N as an example, wherein the method for determining N includes at least one of the followings:

[0125] ● Method 1: N is indicated (explicitly) by the base station.

[0126] ■ Optionally, N is determined based on the CSI reporting configuration. For example, N is determined based on a parameter included in the CSI reporting configuration, for example, indicated / configured (explicitly) by the CSI reporting configuration. For example, the CSI reporting configuration includes / is configured with a parameter for indicating N.

[0127] ■ For example, when the CSI reporting configuration corresponds to periodic CSI report (e.g., a report configuration type parameter (reportConfigType) included in the CSI reporting configuration is set to 'periodic'), N is indicated / configured (explicitly) by the CSI reporting configuration. For example, the CSI reporting configuration includes / is configured with the parameter for indicating N.

[0128] ■ For example, N is indicated by a trigger state (e.g., an aperiodic trigger state or a semi-persistent trigger state) initiated by downlink control information (DCI). For example, The UE may receive / be configured with several trigger states. For example, the UE may receive / be configured with a CSI aperiodic trigger state list parameters (e.g., CSI-AperiodicTriggerStateList) to configure several aperiodic trigger states. For example, the UE may receive / be configured with a semi-persistent CSI trigger state list parameter (e.g., CSI-SemiPersistentOnPUSCH-TriggerStateList) on physical uplink shared channel (PUSCH) to configure several trigger states for semi-persistent CSI report. The UE may receive / detect DCI, which triggers / initiates a trigger state. The trigger status indicates N (and the associated CSI reporting configuration ID, for example, associatedReportConfigInfo). In some embodiments, when the UE detects DCI, the trigger state indicated by DCI may be determined, and (the CSI report corresponding to) the indicated / triggered CSI reporting configuration and the value of N to which the CSI reporting configuration applies / corresponds to are determined by the trigger state. In the disclosure, "trigger state" may be used interchangeably with "trigger state information". For example, when the trigger state is a semi-persistent trigger state, (each) semi-persistent trigger state (e.g., CSI-SemiPersistentOnPUSCH-TriggerState) included in the CSI semi-persistent trigger state list parameter may include / be configured with a parameter for indicating N (and a parameter for indicating the ID of the associated CSI report, e.g., associatedReportConfigInfo). When the trigger state is an aperiodic trigger state, (each) aperiodic trigger state (e.g., CSI-AperiodicTriggerState) included in the CSI aperiodic trigger state list parameter may include / be configured with several CSI associated report configuration information (e.g., CSI-AssociatedReportConfigInfo), wherein one / each CSI associated report configuration information may include a parameter for indicating N (and a parameter for indicating the ID of the associated CSI report, for example, reportConfigId).

[0129] ■ For example, N is indicated by a media access control control element (MAC-CE). For example, the UE receives a MAC-CE indicating the CSI reporting configuration and the N corresponding to the CSI reporting configuration. For example, when a UE receives a MAC-CE and the MAC-CE activates / triggers one CSI or a plurality of CSI reports, the MAC-CE indicates N corresponding to one / part / each CSI reporting configuration (in one or more CSI reporting configurations).

[0130] ● Method 2: N is indicated (implicitly) by the base station.

[0131] ■ Optionally, N is determined based on (the number of) configuration information (from the base station). For example, the UE receives the configuration information from the base station through the CSI reporting configuration, which indicates one or more sub-configuration information. N is based on / equal to the number of the one or more sub-configuration information. Optionally, each sub-configuration may include at least one of a codebook associated parameter, a power associated parameter and a resource parameter. For example, the codebook associated parameter includes parameters for indicating the codebook type and / or the number of ports associated with the codebook. For example, the power associated parameter includes the parameter for determining the energy per resource element (EPRE) corresponding to CSI-RS and / or the EPRE corresponding to the physical downlink shared channel (PDSCH) and / or the EPRE offset between PDSCH and CSI-RS (for CSI computation). For example, the resource parameter includes the parameter for indicating one or more resources in the resource set.

[0132] ■ Optionally, N is determined based on the number of resources in the resource set corresponding to the CSI reporting configuration. For example, N is determined based on K. For example, N≤K.

[0133] ■ Optionally, N is determined based on the number of resources in the resource set corresponding to the CSI reporting configuration and / or an enabling parameter. For example, when the UE receives the enabling parameter (included in / configured in the CSI reporting configuration) (and / or the enabling parameter is set to enable), N is determined based on the number of resources in the resource set corresponding to the CSI reporting configuration (e.g., N is equal to the number of resources in the resource set corresponding to the CSI reporting configuration, or N = K). For example, when the UE does not receive the enabling parameter, or the UE receives the enabling parameter and the enabling parameter is set to disable), N is 1. The indication method of N may enable the UE to determine the number of resources (e.g., the value of N) corresponding to the reported CSI through the enabling parameter.

[0134] ● Method 3: N is predefined.

[0135] ■ For example, N may be at least one of 1, 2, 3, 4, 5, 6, 7 and 8.

[0136] ● Method 4: N is determined based on the UE capability.

[0137] ■ Optionally, N is indicated by the UE capability. Optionally, N is indicated by the reported UE capability. Optionally, the UE capability (or the reported UE capability parameter) may indicate the maximum value of N. For example, N is less than or equal to the value indicated by the UE capability (or the maximum value indicated by the UE capability).

[0138] ■ Optionally, the UE reports the UE capability signaling, and if the UE capability signaling includes a parameter indicating the maximum value of N, then (indicated / configured) N is less than or equal to the maximum value.

[0139] ● Method 5: N is determined / selected by the UE.

[0140] ■ Optionally, the value of N may be explicitly reported through the CSI report. For example, the reported CSI (e.g., CSI part 1) includes information indicating N. For example, the reported CSI (e.g., CSI part 1) includes a field for indicating N. The information in CSI part 1 may be used to determine the size of CSI part 2 by using N indicated in CSI part 1, and the base station may determine the number of information bits corresponding to CSI part 2 by using N indicated in CSI part 1, thus reducing the complexity of blind detection at base station side and improving the performance of the communication system.

[0141] ■ Optionally, the value of N may be reported implicitly through the CSI report. For example, the reported CSI (e.g., CSI part 1) includes information indicating N. For example, the reported CSI (e.g., CSI part 1) includes a bitmap, where each bit corresponds to a resource in the resource set, where if the value of the bit is "1", it means / indicates that the CSI associated with corresponding resource is reported, and if the value of the bit is "0", it means / indicates that the CSI associated with corresponding resource is not reported. N is based on / equal to the number of bits with the value of 1 in the bitmap. Here, the values "0" and "1" are for example only, and the contents indicated by "0" and "1" may be interchanged.

[0142] Optionally, in the disclosure, CSI determination and / or CSI reporting associated with the CSI reporting configuration is performed when a second condition (associated with the CSI reporting configuration) is satisfied, and the second condition includes at least one of the followings:

[0143] ● The number of reported resources is determined / indicated (refer above for the method of determining / indicating the number of reported resources);

[0144] ● The number of reported CRIs is determined / indicated (refer above for the method of determining / indicating the number of reported CRIs);

[0145] ● N is determined (refer above for the determination method of N);

[0146] ● The CSI reporting configuration includes the parameter indicating N;

[0147] ● The CSI reporting configuration includes the enabling parameter;

[0148] ● The number of resources included in the resource set (for channel measurement) corresponding to the CSI reporting configuration is greater than 1;

[0149] ● The number of resources included in the resource set (for channel measurement) corresponding to the CSI reporting configuration is greater than or equal to 2.

[0150] Optionally, the first condition may be combined with the second condition. For example, in the disclosure, CSI determination and / or CSI reporting associated with the CSI reporting configuration is performed when the first condition and / or the second condition (associated with the CSI reporting configuration) are satisfied. Refer above for the contents of the first condition and the second condition.

[0151] Optionally, N (different) CSI-RS resources are determined / selected by the UE from the resource set. For example, N (different) CSI-RS resources are determined / selected by the UE from K resources in the resource set. For example, each of N (different) CSI-RS resources is determined / selected by the UE from K resources in the resource set. Optionally, N (different) CSI-RS resources correspond to CRIs (or to CRIs in the CSI). Optionally, one CRI (in N CRIs) is used to indicate one or more specific resources in the resource set. For example, CRI k (k≥0) corresponds to the k+1-th configured resource in the resource set (or the k+1-th configured resource information in the higher layer parameter NZP-CSI-RS-ResourceSet).

[0152] Optionally, N (different) CSI-RS resources are determined / selected by the UE from a subset of the resource set. N (different) CSI-RS resources being determined / selected by the UE from a subset of the resource set may refer to at least one of the followings: 1) N (different) CSI-RS resources are determined / selected by the UE from N (different) subsets of the resource set; 2) N (different) CSI-RS resources are determined / selected by the UE from the same subset of the resource set; 3) N (different) CSI-RS resources are determined / selected by the UE from less than N (different) subsets of the resource set. For example, the information associated with / corresponding to the subset may be indicated by the base station (e.g., indicated by the CSI reporting configuration). Optionally, N (different) CSI-RS resources are determined / selected by the UE from different subsets of the resource set respectively. Optionally, N CSI-RS resources may be determined from a subset respectively, or N CSI-RS resources may be determined from N subsets respectively. For example, the information associated with / corresponding to the subset (e.g., N subsets) may be indicated by the base station (e.g., indicated by the CSI reporting configuration). Optionally, N (different) CSI-RS resources correspond to CRIs (or to CRIs in the CSI). Optionally, one CRI (in N CRIs) is used to indicate one or more specific resources in a corresponding subset (e.g., a subset of the resource set). For example, CRI k (k≥0) corresponds to the k+1-th configured resource in the subset of the resource set (or the k+1-th configured resource information in the higher layer parameter NZP-CSI-RS-ResourceSet). Optionally, if N (different) CSI-RS resources respectively correspond to N subsets, these subsets may be the same (e.g., have (completely) the same resources) or non-overlapping (e.g., have completely different resources). Selecting N resources from the resource subset may enable the reported N resources to be selected from the subset expected by the base station, and prevent the UE from selecting the combination of N resources not expected by the base station, thereby improving the efficiency of the communication system.

[0153] Optionally, the UE may receive / acquire information for resource restriction (which may be used interchangeably with "resource restriction information" In the present application) from the base station through the CSI reporting configuration.

[0154] ● Optionally, the resource restriction information may indicate a combination of N resources that the UE may (or is allowed to) report. Optionally, the number of resources included in one / each combination is equal to N. For example, there are resources {CSI-RS#1, CSI-RS#2, CSI-RS#3, CSI-RS#4} in the resource set, and N = 2, that is, the UE reports the CSI corresponding to two of them. In addition, if the UE receives resource restriction information {CSI-RS#1, CSI-RS#2}, {CSI-RS#2, CSI-RS#3}, {CSI-RS#1, CSI-RS#4}, the two CSI-RS resources reported by the UE may be one of the combinations indicated in the resource restriction information (e.g., the UE may report two CRIs with values of 0 and 1 respectively, values of 1 and 2 respectively, values of 0 and 3 respectively).

[0155] ● Optionally, the resource restriction information may indicate the combination of N resources that the UE may not (or is not allowed to) report. Optionally, the number of resources included in one / each combination is equal to N. For example, there are resources {CSI-RS#1, CSI-RS#2, CSI-RS#3, CSI-RS#4} in the resource set, and N = 2, that is, the UE reports the CSI corresponding to two of them. In addition, if the UE receives the resource restriction information {CSI-RS#1, CSI-RS#2}, {CSI-RS#2, CSI-RS#3}, {CSI-RS#1, CSI-RS#4}, the two CSI-RS resources reported by the UE may not be one of the combinations indicated in the resource restriction information (e.g., the UE may not report two CRIs with values of 0 and 1 respectively, values of 1 and 2 respectively, values of 0 and 3 respectively).

[0156] Configuring the resource restriction information may enable the reported N resources to be selected from the combination of resources expected by the base station, and prevent the UE from selecting the combination of N resources not expected by the base station, thereby improving the efficiency of the communication system.

[0157] Optionally, N resources may be determined / selected by the UE. For example, the UE may select / determine N resources (from the resource set or a subset of the resource set). Optionally, the UE may select / determine N resources (from K resources) based on the CSI quantity (or measured quantity, or channel measurement, or reported quantity, or the size of CSI quantity) associated with the resources. Optionally, N resources are determined / selected from the resource set or a subset of the corresponding resource set based on CSI quantity (or measured quantity, or channel measurements, or reported quantity, or CSI quantity) corresponding to N resources (respectively). In the disclosure, the term "CSI quantity" may be used interchangeably with "quantity" or "CSI". Optionally, the CSI quantity (or measured quantity, or channel measurement, or reported quantity, or the size of CSI quantity) includes at least one of RI, channel quality, CQI, PMI, L1-RSRP, L1-SINR, RSRP, and LI. For example, the UE selects / determines N resources based on the measured L1-RSRP and / or CQI of the corresponding resources. For example, the UE selects / determines N resources with the highest / lowest L1-RSRP / CQI based on the measured L1-RSRP and / or CQI of the corresponding resources. In this way, the UE may feed back the CSI associated with the N resources with high CSI quantity (or the value of CSI quantity) to the base station according to the CSI quantity corresponding to N resources. Because CSI quantity (or the value of CSI quantity) is usually associated with channel quality, resources corresponding to better channel quality may be reported to the base station based on the CSI report, so that the base station may obtain higher scheduling gain, thereby improving the efficiency of the communication system.

[0158] Optionally, the CRIs associated with N (different) CSI-RS resources (or CRIs in the associated CSI) may or may not be reported. Optionally, when N is equal to K, CRI is not included in the (reported) CSI associated with N (different) CSI-RS resources. Optionally, when N is equal to K, CRI is not included in the CSI associated with each of the N (different) CSI-RS resources. Optionally, when N is equal to K, CRIs associated with N (different) CSI-RS resources are not reported. Optionally, when N is equal to K, the CRI associated with each of the N (different) CSI-RS resources is not reported. When N is equal to K, the base station already knows CSI corresponding to which resources are reported, so it may not report or determine CRI, so as to accordingly reduce the determined / reported uplink control information (UCI) bits, thereby improving the efficiency of the communication system. Optionally, when N < K, the (reported) CSI associated with N (different) CSI-RS resources includes CRI. Optionally, when N < K, CRI is included in the CSI associated with each of the N (different) CSI-RS resources. Optionally, when N < K, the CRIs associated with N (different) CSI-RS resources are reported. Optionally, when N < K, the CRI associated with each of the N (different) CSI-RS resources is reported. When N < K, the base station may not know which resources are selected by the UE for CSI reporting, so it is required that the UE informs / indicates CRI so that the base station may obtain the corresponding resource information, thus ensuring that the base station and the UE have the same understanding of the reported / determined CSI, thus improving the reliability of the communication system.

[0159] Optionally, the UE determines and / or transmits a CSI report. Optionally, the CSI report may include CSI associated with / corresponding to N resources. Optionally, the CSI report may include CRIs associated with / corresponding to N resources and / or CSI corresponding to / associated with CRI. Optionally, CSI corresponding to / associated with CRI is determined / calculated based on CRI. Optionally, the CSI associated with the N resources (or N CRIs) included in the CSI report corresponds to N sub-reports. Optionally, N sub-reports and N resources (or N CRIs) are one-to-one mapped / in one-to-one correspondence. Optionally, N sub-reports and CSI (or N CRIs and CRIs corresponding to / associated with N CRIs) associated with N resources is one-to-one mapped / in one-to-one correspondence. Optionally, one CSI report may include N sub-reports. Optionally, the CSI associated with each resource of N resources (or N CRIs) included in a CSI report is in a (corresponding) sub-report. Optionally, one sub-report includes CSI of a corresponding resource in N resources (or CSI corresponding to N CRIS). In order to make the base station and the UE have the same understanding of the mapping order of CSI information bits in the reported CSI, it is necessary to clarify the mapping order of CSI so that the base station may demodulate accordingly, thus improving the robustness of the communication system. Optionally, (when the CSI report includes CSI associated with N resources, or when CSI report determined and / or reported by the UE includes CSI associated with N resources, or when the CSI report includes N sub-reports), the mapping order of the CSI associated with N resources included in the CSI report is determined based on at least one of the followings:

[0160] ● The order of the N resources;

[0161] ■ For example, the order of values of CRIs corresponding to / associated with N resources. For example, the ascending order of values of CRIs corresponding to / associated with the order of the N resources. For example, the descending order of values of CRIs corresponding to / associated with the order of the N resources.

[0162] ■ For example, the order of resource IDs corresponding to the order of the N resources. For example, one / each resource may be configured with an ID through a higher-layer parameter (e.g., NZP-CSI-RS-ResourceId), and the order of the N resources refers to the ascending / descending order of the IDs corresponding to / associated with N resources.

[0163] ■ For example, the order of the N resources in the resource set. For example, the order of the N resources in the resource set. For example, the UE may be configured with a resource set by receiving a higher-layer parameter (e.g., nzp-CSI-RS-Resources), which includes several parameters for configuring the resource ID, and the order of the N resources refers to the (sequential) order of the parameters for configuring the resource ID in configuration information, for example, the order of entries included in the parameter nzp-CSI-RS-Resources for configuring the resource set.

[0164] ■ The order of subsets of resource set corresponding to N resources;

[0165] ● For example, the order of the N subset configuration information corresponding to N resources in the corresponding configuration information. For example, one configuration information received by the UE includes N subsets configuration information, where N resources are respectively configured by the N subsets configuration information, then the order of the N resources refers to the order of the N subsets configuration information corresponding to N resources in the corresponding configuration information. Refer above for detailed description of N subsets.

[0166] ■ For example, the order (e.g., ascending / descending) of the IDs of the N subsets. For example, one / each subset may be configured with an ID through higher-layer parameters, and the order of N subsets refers to the ascending / descending order of the IDs of N subsets. Refer above for detailed description of N subsets.

[0167] ■ For example, the relative sequence numbers (ascending / descending order) of N resources in the resource set. For example, a relative sequence number of 0 indicates the first resource in the resource set, a sequence number of 1 indicates the second resource in the resource set, and so on. For example, a relative sequence number of 1 indicates the first resource in the resource set, a sequence number of 2 indicates the second resource in the resource set, and so on.

[0168] ● The order of CSI (or CSI quantities) associated with N resources;

[0169] ■ For example, the order of the types of CSI quantities associated with / corresponding to N resources. There may be different types of CSI, for example, CRI, RI, PMI, CQI and LI. Optionally, the type of CSI quantity may include zero padding bits. Optionally, the order (from first to last / from last to first) of the types of CSI may be: CRI, RI, LI, PMI and CQI. Optionally, the order (from first to last / from back to first) of the types of CSI quantities may be: CRI, RI, LI, zero-padding bit, PMI and CQI. Here, the sequential relationship between CSI quantities is exemplary, and the CSI report may include all or part of the above CSI quantity types. If the CSI report includes a part of the types of CSI quantities used for ordering, the order of CSI quantities will not be affected. For example, if the order of CSI quantities is CRI, RI, LI, PMI and CQI, if there is no RI, the order of CSI quantities will be CRI, LI, PMI and CQI, and the order will remain unchanged.

[0170] ■ For example, the order of values of CSI quantities associated with N resources. For example, ascending / descending order of values of CSI quantities associated with N resources. For example, the ascending / descending values of CRIs / RIs / PMIs / CQIs / LIs associated with N resources.

[0171] ● The order of the priorities associated with N resources;

[0172] ■ For example, the order of the priorities of the sub-reports associated with N resources. Refer below for the method of determining the priority.

[0173] ● The order of N sub-reports;

[0174] ■ For example, the order of N sub-reports associated with N resources. Optionally, the order of the N sub-reports is based on / corresponds to at least one of the followings: the order of the sub-report IDs (e.g., the IDs with which the sub-reports are configured); the order of the N resources; the order of CSI associated with the N resources; priorities of N resources; the order of priorities associated with N resources. Here, refer above for detailed description of each order.

[0175] ● The order of subband numbers (or indexes) of CSI associated with the N resources;

[0176] ■ For example, the parity order of subband numbers of CSI associated with the N resources. For example, odd subbands first, then even subbands; or even subbands first, then odd subbands. For example, CSI associated with odd subbands is appended to CSI associated with even subbands. For example, CSI associated with even subbands is appended to CSI associated with even subbands.

[0177] Optionally, the priorities associated with N resources (or the priorities of the CSI associated with N resources) is determined based on at least one of the followings:

[0178] ● CRIs corresponding to N resources;

[0179] ■ For example, the value of CRIs corresponding to N resources. Optionally, if the CRI value corresponding to a resource is larger (in N resources), the priority of the resource (or CSI corresponding to the resource, or CRI corresponding to the resource, or sub-report corresponding to the resource) is lower / higher. Optionally, when the value of CRI corresponding to a resource is 0, the resource (or CSI corresponding to the resource, or CRI corresponding to the resource, or sub-report corresponding to the resource) has the highest / lowest priority. For example, when the CRI value corresponding to a resource is the resource with the smallest CRI value in N resources, the resource (or CSI corresponding to the resource, or CRI corresponding to the resource, or sub-report corresponding to the resource) has the highest / lowest priority. For example, when the CRI value corresponding to a resource is the resource with the largest CRI value in N resources, the resource (or CSI corresponding to the resource, or CRI corresponding to the resource, or sub-report corresponding to the resource) has the highest / lowest priority.

[0180] ● Resource IDs corresponding to N resources;

[0181] ■ For example, the value of the resource ID corresponding to N resources. Optionally, if the value of the resource ID corresponding to a resource is larger (in N resources), the priority of the resource (or CSI corresponding to the resource, or CRI corresponding to the resource, or sub-report corresponding to the resource) is lower / higher. Optionally, when the value of the resource ID corresponding to a resource is 0, the resource (or CSI corresponding to the resource, or CRI corresponding to the resource, or sub-report corresponding to the resource) has the highest / lowest priority. For example, when the value of the resource ID corresponding to a resource is the resource with the smallest value in N resources, the resource (or CSI corresponding to the resource, or CRI corresponding to the resource, or sub-report corresponding to the resource) has the highest / lowest priority. For example, when the value of the resource ID corresponding to a resource is the resource with the largest corresponding resource ID in N resources, the resource (or CSI corresponding to the resource, or CRI corresponding to the resource, or sub-report corresponding to the resource) has the highest / lowest priority.

[0182] ● The positions of N resources in the resource set;

[0183] ■ For example, the relative sequence numbers of N resources in the resource set. For example, a relative sequence number of 0 indicates the first resource in the resource set, a sequence number of 1 indicates the second resource in the resource set, and so on. Optionally, if the value of the relative sequence number corresponding to a resource is larger (in N resources), the priority of the resource (or CSI corresponding to the resource, or CRI corresponding to the resource, or sub-report corresponding to the resource) is lower / higher. Optionally, when the value of the relative sequence number corresponding to a resource is 0, the resource (or CSI corresponding to the resource, or CRI corresponding to the resource, or sub-report corresponding to the resource) has the highest / lowest priority. For example, when the value of the relative sequence number corresponding to a resource is the resource with the smallest value of the corresponding resource ID in N resources, the resource (or CSI corresponding to the resource, or CRI corresponding to the resource, or sub-report corresponding to the resource) has the highest / lowest priority. For example, when the value of relative sequence number corresponding to a resource is the resource with the largest value of relative sequence number in N resources, the resource (or CSI corresponding to the resource, or CRI corresponding to the resource, or sub-report corresponding to the resource) has the highest / lowest priority.

[0184] ● UE capability. For example, the UE capability reported by the UE. For example, reported UE capability parameter. For example, the parameter is, for example, indicates the maximum number of CSI-RS resource in a resource set. Optionally, the parameter for a type-I single-panel codebook and / or a type-I multi-panel codebook. For example, the parameter includes, for example, a first capability parameter and / or a second capability parameter. Optionally, the first capability parameter is used to indicate the maximum number of CSI-RS resources in the resource set (for a type-I single-panel codebook). For example, the parameter is maxNumberCSI-RS-PerResourceSet for a type-I single-panel codebook. Optionally, the second capability parameter is used to indicate the maximum number of CSI-RS resources in the resource set (for a type-I multi-panel codebook). For example, the parameter is maxNumberCSI-RS-PerResourceSet for a type-I multi-panel codebook.

[0185] It is further explained here how the UE determines the priorities associated with / corresponding to resources (or CSI associated with resources, or CRI associated with resources, or sub-reports corresponding to resources) through the UE capability. Optionally, the UE reports a UE capability parameter, wherein the UE capability parameter includes the first capability parameter and / or the second capability parameter. The priorities of resources (or CSI associated with resources, or CRI corresponding to resources, or sub-reports corresponding to resources) in the CSI reporting configuration are determined based on codebook type (e.g., the type of type-I codebook). For example, the types of the type-I codebook include: type-I single-panel codebook and type-I multi-panel codebook. Optionally, when the CSI report includes CSI / PMI associated with a type-I single-panel codebook, the priority of one / each resource (or CSI associated with one / each resource, or CRI corresponding to one / each resource, or sub-report corresponding to one / each resource) is determined based on the first capability parameter. Optionally, when the CSI report includes CSI associated with a type-I multi-panel codebook, the priority of one / each resource (or CSI associated with one / each resource, or CRI corresponding to one / each resource, or sub-report corresponding to one / each resource) is determined based on the second capability parameter. Optionally, the priority of one / each resource (in N resources) (or CSI associated with one / each resource, or CRI corresponding to one / each resource, or sub-report corresponding to one / each resource) is determined based on the parameter that the number of resources indicated / corresponding in the first capability parameter and the second capability parameter is larger / smaller. Optionally, the priority of one / each resource (in N resources) (or CSI associated with one / each resource, or CRI corresponding to one / each resource, or sub-report corresponding to one / each resource) is determined based on the larger / smaller parameter of the first capability parameter and the second capability parameter. Optionally, the priority (e.g., priority value, PriiCSI) of one / each resource (or CSI associated with one / each resource, or CRI corresponding to one / each resource, or sub-report corresponding to one / each resource) is determined / calculated by the following Equation 1:

[0186] [Equation 1]

[0187]

[0188] where the meaning and / or value of each parameter is as follows:

[0189] ● for aperiodic CSI reports to be carried on PUSCH, y=0; for semi-persistent CSI reports to be carried on PUSCH, y=1; for semi-persistent CSI reports to be carried on PUCCH, y=2; for periodic CSI reports to be carried on PUCCH, y=3.

[0190] ● for CSI reports carrying L1-RSRP or L1-SINR, k=0; for CSI reports not carrying L1-RSRP or L1-SINR, k=1.

[0191] ● c is the serving cell index.

[0192] ● Ncellsis the value of the higher layer parameter), wherein the higher layer parameter is used to represent the maximum number of serving cells, for example,maxNrofServingCells. Optionally, the higher layer parameter is associated with the UE capability.

[0193] ● s is thereportConfigID, for example, the reporting configuration ID parameter corresponding to the CSI report.

[0194] ● Msis the value of the higher layer parameter, where the higher-layer parameter is used to indicate the maximum number of reporting configurations, for example,maxNrofCSI-ReportConfigurations. Optionally, the higher layer parameter is associated with the UE capability.

[0195] ● r is based on the positions of resources in the resource set; for example, r is based on the positions of resources in the resource set; for example, r corresponds to the r-th resource in the resource set. If the CSI reporting configuration corresponding to / associated with a CSI report does not satisfy the first condition and / or the second condition, r = 0 for the CSI report.

[0196] ● rmaxmay be based on the first capability parameter and / or the second capability parameter. For example, rmaxis the value of the larger / smaller parameter in the first capacity parameter and second capacity parameter, or the larger / smaller number of resources corresponding to the first capacity parameter and second capacity parameter. For example, when the CSI report (corresponding to the CSI reporting configuration) includes the CSI associated with the type-I single-panel codebook, rmaxis the value of the first capability parameter, or the number of resources corresponding to the first capability parameter. For example, when the CSI report (corresponding to the CSI reporting configuration) includes CSI associated with the type-I multi-panel codebook, rmaxis the value of the second capability parameter, or the number of resources corresponding to the second capability parameter.

[0197] Optionally, the priority (e.g., priority value, PriiCSI) of one / each resource (or CSI associated with one / each resource, or CRI corresponding to one / each resource, or sub-report corresponding to one / each resource) is determined / calculated by the following Equation 2:

[0198] [Equation 2]

[0199]

[0200] Where the meaning and / or value of each parameter is as follows:

[0201] ● for aperiodic CSI reports to be carried on PUSCH, y=0; for semi-persistent CSI reports to be carried on PUSCH, y=1; for semi-persistent CSI reports to be carried on PUCCH, y=2; for periodic CSI reports to be carried on PUCCH, y=3.

[0202] ● for CSI reports carrying L1-RSRP or L1-SINR, k=0; for CSI reports not carrying L1-RSRP or L1-SINR, k=1.

[0203] ● c is the serving cell index.

[0204] ● Ncellsis the value of the higher layer parameter, wherein the higher layer parameter is used to represent the maximum number of serving cells, for example,maxNrofServingCells. Optionally, the higher layer parameter is associated with the UE capability.

[0205] ● s is thereportConfigID, for example, the reporting configuration ID parameter corresponding to CSI reporting.

[0206] ● Msis the value of the higher layer parameter, where the higher-layer parameter is used to indicate the maximum number of reporting configurations, for example,maxnrofcsi-reportconfigurations. Optionally, the higher layer parameter is associated with the UE capability.

[0207] ● r is based on the positions of resources in the resource set; for example, r corresponds to the r+1-th resource in the resource set.

[0208] ● rmaxis based on the first capability parameter and / or the second capability parameter. For example,rmaxis the value of the larger / smaller parameter in the first capacity parameter and second capacity parameter, or the corresponding larger / smaller number of resources in the first capacity parameter and second capacity parameter. For example, when the CSI report (corresponding to the CSI reporting configuration) includes the CSI associated with the type-I single-panel codebook, rmaxis the value of the first capability parameter, or the number of resources corresponding to the first capability parameter. For example, when the CSI report (corresponding to the CSI reporting configuration) includes CSI associated with the type-I multi-panel codebook, rmaxis the value of the second capability parameter, or the number of resources corresponding to the second capability parameter.

[0209] Optionally, the associated / corresponding priority (e.g., priority value, PriiCSI) of CSI reporting is determined / calculated by the following Equation 3:

[0210] [Equation 3]

[0211]

[0212] Where the meaning and / or value of each parameter is as follows:

[0213] ● for aperiodic CSI reports to be carried on PUSCH, y=0; for semi-persistent CSI reports to be carried on PUSCH, y=1; for semi-persistent CSI reports to be carried on PUCCH, y=2; for periodic CSI reports to be carried on PUCCH, y=3.

[0214] ● for CSI reports carrying L1-RSRP or L1-SINR, k=0; for CSI reports not carrying L1-RSRP or L1-SINR, k=1.

[0215] ● c is the serving cell index.

[0216] ● Ncellsis the value of the higher layer parameter, wherein the higher layer parameter is used to represent the maximum number of serving cells, for example,maxNrofServingCells. Optionally, the higher layer parameter is associated with the UE capability.

[0217] ● s is thereportConfigID, for example, the reporting configuration ID parameter corresponding to CSI reporting.

[0218] ● Msis the value of the higher layer parameter, where the higher-layer parameter is used to indicate the maximum number of reporting configurations, for example,maxnrofcsi-reportconfigurations. Optionally, the higher layer parameter is associated with the UE capability.

[0219] Optionally, the higher the value corresponding to the priority, the lower the priority, or the higher the value corresponding to the priority, the higher the priority. For example, a priority value of 0 represents the highest / lowest priority.

[0220] The following describes how the mapping order of CSI associated with N resources is determined based on the order of subband numbers of CSI associated with N resources. Optionally, (for the CSI report including CSI associated with N resources or the CSI report including N CRIs or the CSI report including N sub-reports,) the mapping order of CSI (CSI fields) of the CSI report in CSI part 2 subband may be / may be based on: firstly, mapping CSI associated with (all) even subbands in CSI associated with N resources, and then mapping CSI associated with (all) odd subbands in CSI associated with N resources; or CSI associated with (all) even subbands in CSI associated with N resources is appended to CSI associated with (all) odd subbands in CSI associated with N resources.

[0221] ● Optionally, the mapping order of CSI in CSI associated with (all) even subbands is determined based on at least one of the followings: the order of the N resources; the order of subsets of resource sets corresponding to N resources; the order of CSI quantities associated with N resources; the order of the priorities associated with N resources; the order of sub-reports associated with N resources; the order of subband numbers. Further explanation of each sequence may be found above. The order of subband numbers may be ascending or descending.

[0222] ● Optionally, the mapping order of CSI in CSI associated with (all) odd subbands is determined based on at least one of the followings: the order of the N resources; the order of subsets of resource sets corresponding to N resources; the order of CSI quantities associated with N resources; the order of the priorities associated with N resources; the order of sub-reports associated with N resources; the order of subband numbers. Further explanation of each sequence may be found above. The order of subband numbers may be ascending or descending.

[0223] Optionally, the mapping order of CSI (or CSI fields) of CSI report in CSI subband may be based on at least one of the following methods (for CSI report including CSI associated with N resources, or for CSI report including N CRIS, or for CSI report including N sub-reports):

[0224] Method 1

[0225] Refer the following Table 1 for the order of Subband CSI of CSI part 2 of CSI report (or the fields of CSI parameters included in the subband CSI of CSI part 2 of CSI report) or the mapping order of CSI fields. Here, the CSI report content is, for example, CSI being configured to be transmitted on PUCCH or PUSCH. The order of CSI fields of subband CSI of CSI part 2 in CSI reporting may be from top to bottom (or from bottom to top) in Table 1. Optionally, the pmi-FormatIndicator in the CSI reporting configuration information corresponding to the CSI report is set to 'subbandPMI' and / or the cqi-FormatIndicator in the CSI reporting configuration information is set to 'subbandCQI' (when the CSI reporting is configured to be transmitted on the PUCH, or when the CSI reporting is on the PUCH). Optionally, the reportQuantity parameter in CSI reporting configuration information corresponding to CSI reporting is set to 'cri-RI-CQI' and / or the CQI format indicator (cqi-FormatIndicator) in CSI reporting configuration information is set to 'subbandCQI'.

[0226] CSI fieldCSI part 2 subband of CSI reportSubband CQI of (all) even subbands of the second TB of resource #1 (if reported)PMI subband information fields (X2) of (all) even subbands of resource #1 (if reported)Subband CQI of (all) even subbands of the second TB of resource #2 (if reported)PMI subband information fields (X2) of (all) even subbands of resource #2 (if reported)...Subband CQI of (all) even subbands of the second TB of resource #N (if reported)PMI subband information fields (X2) of (all) even subbands of resource #N (if reported)Subband CQI of (all) odd subbands of the second TB of resource #1 (if reported)PMI subband information fields (X2) of (all) odd subbands of resource #1 (if reported)Subband CQI of (all) odd subbands of the second TB of resource #2 (if reported)PMI subband information fields (X2) of (all) odd subbands of resource #2 (if reported)...Subband CQI of (all) odd subbands of the second TB of resource #NPMI subband information fields (X2) of (all) odd subbands of resource #N (if reported)

[0227] In Table 1, 'If reported' means that a specific CSI field may exist (or be reported).

[0228] Optionally, the CQI is determined based on the following Table 6 and / or Table 7. Optionally, when the CQI corresponds to the subband CQI (e.g., the cqi-FormatIndicator configured by the CSI reporting configuration information is set to / equal to 'subbandCQI'), the CQI is determined based on Table 6 and / or Table 7.

[0229] Optionally, the PMI information field (X2) is determined based on the following Table 4 and / or Table 5, or based on the codebook index for the 2-antenna port. Optionally, when the PMI corresponds to the subband PMI (e.g., the pmi-FormatIndicator configured by the CSI reporting configuration information is set to / equal to 'subbandPMI'), in Table 1, the PMI information field (X2) is determined based on Table 4 and / or Table 5, or based on the codebook index for 2-antenna port.

[0230] In Table 1, the subband CQI may be a subband differential CQI. For example, the differential CQI is represented by differential indication based on wideband CQI. Optionally, the subband CQI of the second TB of resource #1 may include / correspond to / be associated with one or more subband CQIs. The one or more CQIs correspond to one or more (even / odd) subbands. Optionally, the subband CQI (in the corresponding CSI field) is mapped based on the ascending / descending order of subband numbers. Optionally, in the filed including the subband CQI of the second TB of resource #1, the order of the CQI is based on the ascending / descending order of the subband numbers corresponding to the CQI. Similarly, in the filed including the subband CQI of the second TB of resource #2, the order of CQI is based on the ascending / descending order of the subband number corresponding to CQI, and so on.

[0231] In Table 1, the subband PMI of the second TB of resource #1 may include / correspond to / be associated with one or more subband PMIs. The one or more PMIs correspond to one or more (even / odd) subbands. Optionally, the subband PMI (in the corresponding CSI field) is mapped based on the ascending / descending order of subband numbers. Optionally, in the filed including the subband PMI of the second TB of resource #1, the order of PMI is based on the ascending / descending order of the subband numbers corresponding to PMI. Similarly, in the filed including the subband PMI of the second TB of resource #2, the order of PMI is based on the ascending / descending order of the subband numbers corresponding to PMI, and so on.

[0232] Optionally, in Table 1, the subband of CSI report is indicated by the higher-layer parameter csi-ReportingBand (in the corresponding CSI reporting configuration information). The subbands are numbered continuously in the increasing order with the lowest subband of csi-ReportingBand with value set to '1' as subband 0.

[0233] Optionally, N resources include: resource #1, resource #2, ..., and resource #N. Optionally, in Table 1, (the order of) resource #1, resource #2, ... and resource #N are (is) determined based on at least one of the followings:

[0234] ● The order of resource IDs corresponding to resources;

[0235] ■ For example, the ascending / descending order of the IDs corresponding to the resources. For example, the ascending / descending order of (the values of) the parameters nzp-CSI-RS-Resources corresponding to the resources.

[0236] ■ For example, the order of the CQIs corresponding to the resource. For example, the ascending / descending order of the CQIs corresponding to the resource.

[0237] ● The order of resources in the resource set;

[0238] ■ For example, the corresponding (sequential) order of resources in the resource set (e.g., from front to back or from back to front).

[0239] ■ For example, the (sequential) order of the resource configuration information corresponding to the resources in the configuration information used to configure the resource set (e.g., from front to back or from back to front). For example, the configuration information for configuring a resource set may include several configuration information (e.g., several NZP-CSI-RS-ResourceIDs), wherein each configuration information corresponds to a resource ID. The UE may determine resource #1, resource #2, ..., and resource #N based on the order of several configuration information (corresponding to the resource ID) in the configuration information used to configure the resource set (e.g., from front to back or from back to front).

[0240] ■ For example, the relative sequence number (ascending / descending) of the resource in the resource set. For example, a relative sequence number of 0 indicates the first resource in the resource set, a sequence number of 1 indicates the second resource in the resource set, and so on. For example, a relative sequence number of 1 indicates the first resource in the resource set, a sequence number of 2 indicates the second resource in the resource set, and so on.

[0241] ● The order of the subsets of the resource set corresponding to the resource;

[0242] ■ For example, the (sequential) order of the subset corresponding to resources in the corresponding configuration information (e.g., from front to back or from back to front). Refer above for a detailed description of the subset corresponding to the resource.

[0243] ■ For example, the ascending / descending order of the subset ID corresponding to the resource. Refer above for a detailed description of the subset corresponding to the resource.

[0244] ● The order of CSI quantities associated with resources;

[0245] ■ For example, the order of CRIs corresponding to resources. For example, the ascending / descending order of CRIs corresponding to the resource.

[0246] ■ For example, the order of the RIs corresponding to the resource. For example, the ascending / descending order of the RIs corresponding to the resource.

[0247] ■ For example, the order of the CQIs corresponding to the resource. For example, the ascending / descending order of the CQIs corresponding to the resource.

[0248] ■ For example, the order of PMIs corresponding to resources. For example, the ascending / descending order of the CQIs corresponding to the resource.

[0249] ● The order of priority of resource association;

[0250] ■ For example, the order of priorities corresponding to resources. For example, the ascending / descending order of the priority of the resource.

[0251] ● The order of sub-reports associated with resources;

[0252] ■ For example, the order of sub-reports corresponding to resources. For example, the ascending / descending ID of the sub-report corresponding to the resource.

[0253] Method 1 based on Table 1 may put the CSI corresponding to the odd subband number and the CSI corresponding to the even subband number together respectively, which is convenient for some or all of these two parts to be discarded or partially discarded, thus improving the flexibility of the communication system. For example, this method may (preferentially) discard CSI corresponding to odd subband numbers.

[0254] Method 2

[0255] Refer Table 2 below for the order of CSI of CSI of the subband of CSI part 2 of CSI report (or the fields of CSI parameters included in the subband CSI of CSI part 2 of CSI report) or the mapping order of CSI fields. Here, the CSI report content, for example, CSI is configured to be transmitted on PUCCH or PUSCH. The order of CSI fields of subband CSI of CSI part 2 in CSI reporting may be from top to bottom (or from bottom to top) in Table 2. Optionally, the pmi-FormatIndicator in the CSI reporting configuration information corresponding to the CSI report is set to 'subbandPMI' and / or the cqi-FormatIndicator in the CSI reporting configuration information is set to 'subbandCQI' (when the CSI reporting is configured to be transmitted on the PUCH, or when the CSI reporting is on the PUCH). Optionally, the reportQuantity parameter in CSI reporting configuration information corresponding to CSI reporting is set to 'cri-RI-CQI' and / or the CQI format indicator (cqi-FormatIndicator) in CSI reporting configuration information is set to 'subbandCQI'.

[0256] CSI fieldCSI part 2 subband of CSI reportSubband CQI of (all) even subbands of the second TB of resource #1 (if reported)PMI subband information fields (X2) of (all) even subbands of resource #1 (if reported)Subband CQI of (all) odd subbands of the second TB of resource #1 (if reported)PMI subband information fields (X2) of (all) odd subbands of resource #1 (if reported)Subband CQI of (all) even subbands of the second TB of resource #2 (if reported)PMI subband information fields (X2) of (all) even subbands of resource #2 (if reported)Subband CQI of (all) odd subbands of the second TB of resource #2 (if reported)PMI subband information fields (X2) of (all) odd subbands of resource #2 (if reported)...Subband CQI of (all) even subbands of the second TB of resource #N (if reported)PMI subband information fields (X2) of (all) even subbands of resource #N (if reported)Subband CQI of (all) odd subbands of the second TB of resource #N (if reported)PMI subband information fields (X2) of (all) odd subbands of resource #N (if reported)

[0257] refer to the description of Table 1 in Method 1 above for the description of CSI fields or parameters or CSI quantities (e.g., CQI / PMI) or resources in CSI field in Table 2.

[0258] Method 2 based on Table 2 may put CSI corresponding to the same resources together respectively, which is convenient for UE to discard CSI at resource level, thus improving the flexibility of the communication system.

[0259] Method 3

[0260] Refer Table 3 below for the order of CSI of the subband of CSI part 2 of CSI report (or the fields of CSI parameters included in the subband CSI of CSI part 2 of CSI report) or the mapping order of CSI fields. Here, the CSI report content, for example, CSI is configured to be transmitted on PUCCH or PUSCH. The order of CSI fields of subband CSI of CSI part 2 in CSI reporting may be from top to bottom (or from bottom to top) in Table 3. Optionally, the pmi-FormatIndicator in the CSI reporting configuration information corresponding to the CSI report is set to 'subbandPMI' and / or the cqi-FormatIndicator in the CSI reporting configuration information is set to 'subbandCQI' (when the CSI reporting is configured to be transmitted on the PUCH, or when the CSI reporting is on the PUCH). Optionally, the reportQuantity parameter in CSI reporting configuration information corresponding to CSI reporting is set to 'cri-RI-CQI' and / or the CQI format indicator (cqi-FormatIndicator) in CSI reporting configuration information is set to 'subbandCQI'.

[0261] CSI fieldCSI part 2 subband of CSI reportSubband CQI of (all) even subbands of the second TB of resource #1, resource #2, ... and resource #N (if reported).PMI subband information fields (X2) of (all) even subbands of resource #1, resource #2, ... and resource #N (if reported)Subband CQI of (all) odd subbands of the second TB of resource #1, resource #2, ... and resource #N.PMI subband information fields (X2) of (all) odd subbands of resource #1, resource #2, ... and resource #N (if reported)

[0262] In Table 3, 'if reported' indicates that a specific CSI field may exist (or be reported). For a CSI field, 'if reported' may indicate that the corresponding CSI parameter (e.g., CQI / PMI) of each sub-configuration may exist (respectively).

[0263] Here, in Table 3, taking CSI parameter being CQI as an example, the CQIs corresponding to resource #1, resource #2, ... and resource #N may share a CSI field, or the CQIs of resource #1, resource #2, ... and resource #N may respectively correspond to a CSI field. For example, the CQIs of resource #1, resource #2, ..., and resource #N are one-to-one mapped with N CSI fields.

[0264] Here, in Table 3, taking the CSI parameter being PMI as an example, the PMIs corresponding to resource #1, resource #2, ... and resource #N may share a CSI field, or the PMIs of resource #1, resource #2, ... and resource #N may respectively correspond to a CSI field. For example, the PMIs of resource #1, resource #2, ..., and resource #N are one-to-one mapped with N CSI fields.

[0265] Optionally, in Table 3, in one (or each) CSI field, the order of information bits of CSI parameter (e.g., CQI / PMI) may be based on the order of resource #1, resource #2, ... and resource #N. Refer to the description of Method 1 based on Table 1 above for the method of determining resource #1, resource #2, ..., and resource #N.

[0266] Optionally, in Table 3, the CSI field / CSI information bits are based on the order of parity (e.g., the order of CSI corresponding to odd subband numbers and CSI corresponding to even subband numbers), then the order of CSI parameter types, then the order of subband numbers and then the order of resources. Optionally, the order of CSI parameters is CQI parameter first and PMI parameter later. Optionally, in Table 3, the CSI field / CSI information bits are based on the parity order (e.g., the order of CSI corresponding to odd subband numbers and CSI corresponding to even subband numbers), then the order of CSI parameter types, then the order of resources and then the order of subband numbers. Optionally, the order of CSI parameters is CQI parameter first and PMI parameter later.

[0267] Optionally, in Table 3, for the CSI field including the subband CQI of (all) even subbands of the second TB of resource #1, resource #2, ... and resource #N, the order of information bits of this CSI field is based on the order (e.g., ascending or descending) of subband numbers corresponding to the subband CQI of the second TB and the order of resources. For example, information bits of CSI field (e.g., information bits of subband CQI) are ordered based on the order of subband numbers corresponding to subband CQI, and then based on the order of resource #1, resource #2, ... and resource #N. For example, CQI{resource #1, subband #0}, CQI{resource #2, subband #0}, ..., CQI{resource #N, subband #0}, CQI{resource #N, subband #1}, ..., CQI{resource #N, subband #max}. For example, information bits of CSI field (e.g., information bits of subband CQI) are ordered based on the order of resource #1, resource #2, ... and resource #N first, and then based on the order of subband numbers corresponding to subband CQI. For example, CQI{resource #1, subband #0}, CQI{resource #1, subband #2}, ..., CQI{resource #1, subband #max}, CQI{resource #2, subband #0}, CQI{resource #2, subband #2}, .... Here, subband #max represents the maximum even number (or the maximum even number value) of the subband. Here, refer to Method 1 based on Table 1 above for the description of subbands and subband numbers.

[0268] Optionally, in Table 3, the description / ordering of CSI field of subband CQI of (all) odd subband numbers of the second TB including resource #1, resource #2, ... and resource #N refers to subband CSI field of even subband numbers (e.g., replace "even" with "odd" in the description).

[0269] Here, in Table 3, the description or ordering method of the subband PMI (of even subband number / odd subband number) is similar to the description of the subband CQI, and refers to CQI (e.g., replace the CQI in the description with PMI).

[0270] Optionally, for the determination of the CQI, refer to Method 1 based on Table 1 above.

[0271] Optionally, for the method of determining PMI information field (X2), refer to Method 1 based on Table 1 above.

[0272] Optionally, the method for determining the resources #1, #2, ..., and #N of CSI report, or the method for determining the order of the resources #1, #2, ..., and #N of CSI report, refer to Method 1 based on Table 1 above.

[0273] Method 3 based on Table 3 may put the CSI corresponding to the odd subband number and the CSI corresponding to the even subband number together respectively, which is convenient for some or all of these two parts to be discarded or partially discarded, thus improving the flexibility of the communication system. For example, the method may (preferentially) discard CSI corresponding to odd subband numbers.

[0274] CSI (e.g., CQI, RI, PMI) may be determined by at least one of Tables 4 to 7. The bitwidth / number of bits (in CSI field) corresponding to CSI (e.g., CQI, RI and PMI) may be determined by at least one of Tables 4 to 7. Tables 4 to 7 are given below.

[0275] [Table 4]

[0276]

[0277]

[0278] When the number of ports (the number of CSI-RS ports) is equal to 1, the bitwidth of PMI is 0. When the number of ports (the number of CSI-RS ports) is equal to 2, the rank is 1, and the parameter codebookType=typeI-SinglePanel is satisfied, the bitwidth of PMI is 2. Optionally, the rank here refers to the rank included / reported in CSI. When the number of ports (the number of CSI-RS ports) is equal to 2, the rank is 2, and the parameter codebookType=typeI-SinglePanel is satisfied, the bitwidth of PMI is 1. Optionally, the rank here refers to the rank included / reported in CSI. When the number of ports (the number of CSI-RS ports) is greater than 2 and the parameter codebookType=typeI-SinglePanel is satisfied, the bitwidth of PMI may be provided / represented by Table 4.

[0279] [Table 5]

[0280]

[0281]

[0282] When the number of ports (the number of CSI-RS ports) is equal to 1, the bitwidth in PMI is 0. When the parameter codebookType=typeI-MultiPanel is satisfied, the bitwidth of PMI is provided / represented by Table 5.

[0283] [Table 6]

[0284]

[0285] In case the parameter codebookType=typeI-SinglePanel, or the report quantity parameter reportQuantity is set to ‘cri-RI-CQI’, or a CSI-RS port is satisfied, the bitwidth of RI / LI / CQI / CRI is provided / represented by Table 6.

[0286] In Table 6, Kjindicates the number of one or more resources in the resource set. In Table 6, nRIindicates the number of allowed values of RI. ν refers to the value of rank. The values of the rank indicator field are mapped to allowed rank indicator values with increasing order, where ‘0’ is mapped to the smallest allowed rank indicator value. For higher layer parameter reportQuantity set to 'cri-RI-CQI', the values of the rank indicator field are mapped to rank indicator values with increasing order, where '0' is mapped to rank-1.

[0287] [Table 7]

[0288]

[0289] In case that the parameter codebookType = typeI-MultiPanel is satisfied, the bitwidth of RI / LI / CQI / CRI is provided / represented by Table 7.

[0290] In Table 7, Kjindicates the number of one or more resources in the resource set. In Table 5-4, nRIindicates the number of allowed values of RI. ν refers to the value of rank. The values of the rank indicator field are mapped to allowed rank indicator values with increasing order, where ‘0’ is mapped to the smallest allowed rank indicator value.

[0291] In some cases, UE may transmit UCI information (including CSI) in PUSCH or PUCCH. When the payload of the UCI (including CSI) to be transmitted is too large such that exceeding the upper limit of the capacity of the (configured / allowed) channel, the UE may omit or not transmit some CSI bits based on the priority, thus transmitting the high-priority CSI to the base station as much as possible while ensuring the reliability of uplink transmission, and improving the efficiency of the communication system. The following describes the method of CSI omission (e.g., the CSI omission method when the CSI report includes CSI associated with N resources).

[0292] ● Method 1: the omission of CSI information (in CSI report, or associated with N resources) is performed at the level of (CSI of) resource.

[0293] ■ For example, the omission of CSI information is performed at the level of (CSI associated with / corresponding to) resource. For example, the omission of CSI information is based on the granularity of CSI of resources. For example, each resource (or each CRI, or each sub-report) in N resources (or N CRIs, or N sub-reports) included in a CSI report may correspond to a priority, and the UE performs CSI omission based on the priority corresponding to the resource (or CRI, or sub-report). For example, if a CSI report includes CSI corresponding to CSI-RS#1, CSI corresponding to CSI-RS#2, ..., CSI corresponding to CSI-RS#N, the UE may omit (all) CSI corresponding to one or more CSI-RS resources based on the corresponding priority. For example, omit the low-priority CSI first and then omit the high-priority CSI. Here, the method for determining the priority is described above. The omission of CSI information is performed at the level of resource. UE may omit CSI information bits with smaller granularity than CSI report, so as to avoid discarding too many CSI information bits, thus improving the efficiency of communication system.

[0294] ● Method 2: the omission of CSI information (in CSI report, or associated with N resources) is for CSI Part 2.

[0295] ■ For example, Method 2 may be combined with Method 1, that is, the operation of Method 1 is for CSI in CSI part 2.

[0296] ● Method 3: the omission of CSI information (in CSI report, or associated with N resources) is performed for the subband CSI of CSI Part 2.

[0297] ■ For example, Method 3 may be combined with Method 1, that is, the operation of Method 1 is performed for CSI in the subband CSI of CSI part 2.

[0298] ● Method 4: the omission of CSI information (in CSI report, or associated with N resources) is for CSI on PUSCH.

[0299] ■ For example, Method 4 may be combined with at least one of Method 1, Method 2 and Method 3, that is, the operation in at least one of Method 1, Method 2 and Method 3 is for the CSI on the PUSCH.

[0300] ● Method 5: the omission of CSI information (in CSI report, or associated with N resources) is for CSI on PUCCH.

[0301] ■ For example, Method 5 may be combined with at least one of Method 1, Method 2 and Method 3, that is, the operation in at least one of Method 1, Method 2 and Method 3 is for the CSI on the PUCCH.

[0302] Since the rank in CSI report (e.g., the rank indicated by RI) is selected / determined by the UE, the base station may not know the rank reported by the UE before decoding the channel associated with the uplink channel (e.g., PUSCH or PUCCH). In some cases (different reported ranks may correspond to different payload / information bits), this will affect some behaviors of the UE, for example, the determination of PUCCH resource, the determination of the number of corresponding resource physical resource blocks (PRB), or the determination of the number of CSI reports in CSI Part 2. A feasible method is that both the base station and the UE use the same assumption of predefined rank, so that the above-mentioned UE behavior has nothing to do with the rank reported by the UE, which can prevent the UE and the base station from having different understandings, thus improving the reliability of the communication system. The specific method is as follows: (UE) assume that the rank in CSI report is a predefined rank, or the configured highest allowed rank. The predefined rank may be one of 1(rank 1, Rank 2, Rank 3 and Rank 4. Take the rank in CSI reporting as rank 1 as an example. For example, (UE) assumes that CSI reporting indicates rank 1(rank 1). For example, (UE) assumes that the RI in the CSI report indicates 1(rank 1. For example, (UE) performs the above UE behavior based on the assumption that CSI reports indicate 1(rank 1. For example, when the third condition is satisfied, the UE determines PUCCH resource and / or the number of PRB(s) corresponding to PUCCH resource based on the assumption that the CSI / RI corresponding to each resource of N resources (or each CRI or each sub-report) indicates 1(rank 1, or determines a CSI report including CSI part 2 (in the disclosure, referred to as CSI part 2 CSI Report (Part 2 CSI). The third condition includes at least one of the followings:

[0303] ● UE would multiplex CSI reports that include Part 2 CSI reports in a PUCCH resource;

[0304] ● CSI report includes CSI corresponding to / associated with N resources;

[0305] ● CSI report includes CSI corresponding to N CRIs;

[0306] ● CSI report includes N sub-reports;

[0307] ● report quantity parameter corresponding to the CSI reporting configuration (or with which the CSI reporting configuration is configured) includes at least 'RI';

[0308] ● report quantity parameter (e.g., reportQuantity) corresponding to the CSI reporting configuration (or with which the CSI reporting configuration is configured) is set to at least one of 'cri-RI-PMI-CQI', 'cri-RI-LI-PMI-CQI', 'cri-RI-i1', 'cri-RI-i1-CQI' and 'cri-RI-CQI'.

[0309] ● report quantity parameter (e.g., reportQuantity) corresponding to the CSI reporting configuration (or with which the CSI reporting configuration is configured) is set to at least one of 'cri-RI-PMI-CQI', 'cri-RI-LI-PMI-CQI', 'cri-RI-i1-CQI' and 'cri-RI-CQI'.

[0310] ● The number of reported resources is determined / indicated (refer above for the method of determining / indicating the number of reported resources);

[0311] ● The number of reported CRIs is determined / indicated (refer above for the method of determining / indicating the number of reported CRIs);

[0312] ● N is determined (refer above for the determination method of N);

[0313] ● CSI reporting configuration includes a parameter indicating N;

[0314] ● CSI reporting configuration includes an enabling parameter;

[0315] ● The number of resources included in the resource set (for channel measurement) corresponding to the CSI reporting configuration is greater than 1;

[0316] ● The number of resources included in the resource set (for channel measurement) corresponding to the CSI reporting configuration is greater than or equal to 2.

[0317] Since the number (e.g., n) of resources corresponding to CSI in the CSI report may be selected / determined by the UE, the base station may not know how many resources corresponding to CSI included in the report of the UE before decoding the channel associated with the uplink channel (e.g., PUSCH or PUCCH). In some cases (the number of resources corresponding to different CSI may correspond to different payload / information bits), this will affect some behaviors of the UE, for example, the determination of PUCCH resource, the determination of the number of corresponding resources PRB, or the determination of the number of CSI reports in CSI Part 2. A feasible method is that both the base station and the UE use the same pre-defined assumption of the number of resources (e.g. N) corresponding to CSI, so that the above UE behavior has nothing to do with the number of resources (e.g. N) corresponding to CSI reported by the UE, thus avoiding different understandings between the UE and the base station, thus improving the reliability of the communication system. The specific method is as follows, taking N as an example to describe: (UE) assume that the N corresponding to CSI reporting is predefined (e.g., it is one of 1, 2, 3 and 4), or that N is equal to K, or that N is a maximum parameter based on the configuration of the base station, or that N is based on / equal to the maximum parameter associated with UE capability. For example, the UE may receive a parameter included / configured in the CSI reporting configuration for indicating the maximum value of reported N. For example, the UE may report a maximum parameter associated with the UE capability (e.g., a parameter indicating the maximum value of N). For example, the UE may report a parameter indicating the maximum value of N to the base station through UE capability signaling. When at least one of the fourth conditions is satisfied, based on the assumption that N is predefined (e.g., N is one of 1, 2, 3 and 4), or based on the assumption that N is based on / equal to the value indicated by the maximum parameter associated with UE capability, the UE determines the PUCCH resource and / or the number of PRBs corresponding to the PUCCH resource, or determines the number of Part 2 CSI reports. When at least one of the fourth conditions is satisfied, the UE determines PUCCH resource and / or the number of PRB(s) corresponding to the PUCCH resource, or determines the number of Part 2 CSI reports, assuming at least one of the followings: N is predefined (e.g., one of 1, 2, 3 and 4), or N is equal to K, or N is based on / equal to the value indicated by the maximum parameter associated with the UE capability. The fourth condition includes at least one of the followings:

[0318] ● a UE would multiplex CSI reports that include Part 2 CSI reports in a PUCCH resource;

[0319] ● CSI report includes CSI corresponding to N resources;

[0320] ● CSI report includes CSI corresponding to N CRIs;

[0321] ● CSI report includes CSI corresponding to N sub-reports;

[0322] ● report quantity parameter corresponding to the CSI reporting configuration (or with which the CSI reporting configuration is configured) includes at least 'RI';

[0323] ● report quantity parameter (e.g., reportQuantity) corresponding to the CSI reporting configuration (or with which the CSI reporting configuration is configured) is set to at least one of 'cri-RI-PMI-CQI', 'cri-RI-LI-PMI-CQI', 'cri-RI-i1', 'cri-RI-i1-CQI' and 'cri-RI-CQI';

[0324] ● report quantity parameter (e.g., reportQuantity) corresponding to the CSI reporting configuration (or with which the CSI reporting configuration is configured) is set to at least one of 'cri-RI-PMI-CQI', 'cri-RI-LI-PMI-CQI', 'cri-RI-i1-CQI' and 'cri-RI-CQI';

[0325] ● The number of reported resources is determined / indicated (refer above for the method of determining / indicating the number of reported resources);

[0326] ● The number of reported CRIs is determined / indicated (refer above for the method of determining / indicating the number of reported CRIs);

[0327] ● N is determined (refer above for the determination method of N);

[0328] ● CSI reporting configuration includes a parameter indicating N;

[0329] ● CSI reporting configuration includes an enabling parameter;

[0330] ● The number of resources included in the resource set (for channel measurement) corresponding to the CSI reporting configuration is greater than 1;

[0331] ● The number of resources included in the resource set (for channel measurement) corresponding to the CSI reporting configuration is greater than or equal to 2.

[0332] Since the resources (e.g., N resources or N-NRresources) corresponding to the CSI in the CSI report may be selected / determined by the UE, the base station may not know the CSI of which resources the CSI contained in the UE's reporting corresponds to before decoding the channels related to the uplink channel (e.g., PUSCH or PUCCH). In some cases (for example, when each of the K resources is configured with rank restriction), different resources correspond to different payloads / different numbers of information bits, which will affect the behaviors of some UEs, for example, the determination of PUCCH resources, the determination of the number of corresponding resources PRB, or the determination of the number of CSI reports in CSI Part 2. A feasible method is the assumption that both the base station and the UE use the same N resources in the K resources, so that the UE behaviors are irrespective of the resources corresponding to the CSI reported by the UE, which can prevent the base station from decoding the CSI by using the CSI size corresponding to wrong CSI resources, thus improving the reliability of the communication system. In this method, the description for N resources may also be used to describe N-NRresources. In this method, the description for K resources may also be used to describe K-NRresources. Refer below for the description related to NR.

[0333] Optionally, the UE assumes / determines that N CRIs are in the CSI report. When an eighth condition is satisfied, based on the assumption that N CRIs are in the CSI report, the UE determines the number of PRBs corresponding to PUCCH resources and / or PUSCH resources, or determines a number of Part 2 CSI reports. When the eighth condition is satisfied, the UE determines the number of PRBs corresponding to PUCCH resources and / or PUSCH resources, or determines the number of Part 2 CSI reports, assuming that N CRIs are in the CSI report. Optionally, the N CRIs may indicate different values, respectively. Optionally, N CRIs may all indicate the same value. Optionally, N CRIs may indicate 0, 1, 2, ... N-1, respectively. Optionally, the n-th CRI in the N CRIs indicates n-1. Optionally, 1≤n≤N. Optionally, N CRIs all indicate 0. Optionally, the values of N CRIs are all 0. Optionally, N CRIs all indicate N-1. Optionally, the values of N CRIs are all N-1. Optionally, the N CRIs may be associated with / correspond to N specific resources. Optionally, the N CRIs may be associated with / correspond to a specific resource. Optionally, the RI associated with / corresponding to each CRI indicates 1 (rank 1). Optionally, the RI associated with / corresponding to each CRI indicates rank X, where X may be one of 1, 2, 3, 4, 5, 6, 7 and 8. Optionally, the RI associated with / corresponding to each CRI indicates the lowest allowed rank associated with the corresponding resource.

[0334] Optionally, the N specific resources may be at least one of the followings: the N resources with the smallest / largest resource ID in the K resources, or the N resources in the K resources determined based on the configuration order of the resources in the resource set. Optionally, the resource ID may be the configured resource ID, for example, NZP-CSI-RS-ResourceId. Optionally, the N resources in the K resources determined based on the configuration order of the resources in the resource set refer to the resources in the K resources that are configured based on the first N entries (or the last N entries) in the resource set. For example, the CSI-RS reference signal set includes {CSI-RS#4, CSI-RS#1, CSI-RS#3, CSI-RS#2}, and N = 2. In the case of determining based on the CSI-RS with the smallest resource ID, the N specific resources refer to CSI-RS#1 and CSI-RS#2. In the case of determining based on the first N entries in the resource set, the N specific resources refer to CSI-RS#4 and CSI-RS#1.

[0335] Optionally, the specific resource may be at least one of the followings: a resource with the smallest / largest resource ID in the K resources, or a resource determined based on the configuration order of the resources in the resource set. Optionally, the resource ID may be the configured resource ID, for example, NZP-CSI-RS-ResourceId. Optionally, a resource determined based on the configuration order of the resources in the resource set refers to the resource in the K resources with the first (or the last) entry is configured in the resource set. For example, the CSI-RS reference signal set includes {CSI-RS#4, CSI-RS#1, CSI-RS#3, CSI-RS#2}, and N = 2. In the case of determining based on the CSI-RS with the smallest resource ID, both CRIs are associated with / corresponding to CSI-RS#1. In the case of determining based on the first entry in the resource set, both CRIs are associated with / corresponding to CSI-RS#4.

[0336] Optionally, the eighth condition includes at least one of the followings:

[0337] ● the UE would multiplex CSI reports that include Part 2 CSI reports in a PUCCH resource;

[0338] ● K rank restrictions are configured;

[0339] ● the CSI report includes the CSI corresponding to N resources;

[0340] ● the CSI report includes the CSI corresponding to N CRIs;

[0341] ● the CSI report includes the CSI corresponding to N sub-reports;

[0342] ● the report quantity parameter corresponding to the CSI reporting configuration (or with which the CSI reporting configuration is configured) includes at least 'RI';

[0343] ● the report quantity parameter (e.g., reportQuantity) corresponding to the CSI reporting configuration (or with which the CSI reporting configuration is configured) is set to at least one of 'cri-RI-PMI-CQI', 'cri-RI-LI-PMI-CQI', 'cri-RI-i1', 'cri-RI-i1-CQI' and 'cri-RI-CQI';

[0344] ● the report quantity parameter (e.g., reportQuantity) corresponding to the CSI reporting configuration (or with which the CSI reporting configuration is configured) is set to at least one of 'cri-RI-PMI-CQI', 'cri-RI-LI-PMI-CQI', 'cri-RI-i1-CQI' and 'cri-RI-CQI';

[0345] ● the number of reported resources is determined / indicated (refer above for the method of determining / indicating the number of reported resources);

[0346] ● the number of reported CRIs is determined / indicated (refer above for the method of determining / indicating the number of reported CRIs);

[0347] ● N is determined (refer above for the determination method of N);

[0348] ● the CSI reporting configuration includes a parameter indicating N;

[0349] ● the CSI reporting configuration includes an enabling parameter;

[0350] ● the number of resources included in the resource set (for channel measurement) corresponding to the CSI reporting configuration is greater than 1;

[0351] ● the number of resources included in the resource set (for channel measurement) corresponding to the CSI reporting configuration is greater than or equal to 2.

[0352] Refer below for descriptions of NR, N-NRresources and K-NRresources in the above method.

[0353] In some cases, enough measurements (e.g., measurements of reference signals) may not be received, and accordingly, a meaningful report may not be generated due to incomplete measurement information (e.g., the number of measured reference signal resources is less than N), so CSI reporting may not be performed in order to save uplink transmission resources. The following describes in detail under what conditions the CSI report corresponding to the CSI reporting configuration described in the embodiment should be transmitted or discarded. Optionally, when the fifth condition is satisfied, the UE transmits the CSI report; otherwise, the UE discards the CSI report. Optionally, when the fifth condition is satisfied, the UE transmits a CSI report. Optionally, when the fifth condition is not satisfied, the UE discards the CSI report. The fifth condition includes at least one of the followings:

[0354] ● After the CSI report (re)configuration, serving cell activation, BWP change, or activation of SP-CSI;

[0355] ● Receiving at least one CSI-RS transmission occasion for channel measurement and / or one CSI-RS and / or CSI-IM occasion for interference measurement;

[0356] ■ Optionally, the CSI-RS transmission occasion (for channel measurement) is for at least N resources in the resource set.

[0357] ■ Optionally, the CSI-RS transmission occasion (for channel measurement) is for at least Y resources in the resource set, where Y is based on / equal to N.

[0358] ■ Optionally, the CSI-RS and / or CSI-IM occasion (for interference measurement) are targeted at least N CSI-RS and / or CSI-IM resources in the resource set.

[0359] ■ Optionally, the CSI-RS and / or CSI-IM occasion (for interference measurement) is that the number of CSI-RS and / or CSI-IM resources in the resource set is at least N.

[0360] ■ Optionally, the CSI-RS transmission occasion is no later than the CSI reference resource. For example, the CSI-RS transmission occasion is a CSI-RS transmission occasion no later than the CSI reference resource.

[0361] ■ Optionally, the CSI-RS and / or CSI-IM occasion is no later than the CSI reference resource. For example, CSI-RS and / or CSI-IM occasion is CSI-RS and / or CSI-IM occasion no later than CSI reference resources.

[0362] ● The first condition is satisfied;

[0363] ● The second condition is satisfied.

[0364] In case that discontinuous reception (DRX) (e.g., UE DRX) is configured, enough measurements may not be received (e.g., the number of measured reference signal resources is less than N) within the DRX active time, and accordingly, a meaningful report may not be generated due to incomplete measurement information, so CSI reporting may not be performed in order to save uplink transmission resources. The following describes in detail under what conditions the CSI report corresponding to the CSI reporting configuration described in the embodiment should be transmitted or discarded. The UE determines whether to send the CSI report or discard the CSI report based on the fifth condition. When DRX is configured, the CSI-RS and / or CSI-IM occasion in the fifth condition refers to the CSI-RS and / or CSI-IM occasion within the DRX active time.

[0365] In the case of cell discontinuous transmission (DTX) and / or UE DRX, the UE may not receive enough measurements (e.g., measurements of reference signals) within the cell DTX active time and / or DRX active time. Accordingly, the UE may not generate meaningful reports due to incomplete measurement information, so such CSI reports may not be fed back to save uplink transmission resources. The following describes in detail under what conditions the CSI reported corresponding to the CSI reporting configuration described in the embodiment should be transmitted or discarded. Optionally, when the sixth condition is satisfied, the UE transmits the CSI report; otherwise, the UE discards the CSI report. Optionally, when the sixth condition is satisfied, the UE transmits a CSI report. Optionally, when the sixth condition is not satisfied, the UE discards the CSI report. The sixth condition includes at least one of the followings:

[0366] ● report quantity corresponding to the CSI reporting configuration includes RI;

[0367] ● cell DTX of the serving cell where the CSI reporting configuration is located is activated and / or configured;

[0368] ● the cell DTX of the serving cell where the CSI resource setting (e.g., CSI-ResourceConfig) associated with the CSI reporting configuration are located is activated and / or configured;

[0369] ● cell DTX of the serving cell where the resources for measurement corresponding to the CSI reporting configuration is activated and / or configured;

[0370] ● cell DTX of the serving cell where the resources for channel measurement (and / or interference measurement) corresponding to the CSI reporting configuration are located is activated and / or configured;

[0371] ● DRX is configured;

[0372] ● After the CSI report (re)configuration, serving cell activation, BWP change, or activation of SP-CSI;

[0373] ● Receiving at least one CSI-RS transmission occasion for channel measurement and / or one CSI-RS and / or CSI-IM occasion for interference measurement; or receiving at least one CSI-RS transmission occasion for channel measurement and / or interference measurement;

[0374] ■ Optionally, the CSI-RS transmission occasion (for channel measurement and / or interference measurement) is for at least N (periodic or semi-persistent) resources in the resource set.

[0375] ■ Optionally, the CSI-RS transmission occasion (for channel measurement and / or interference measurement) is that the number of (periodic or semi-persistent) resources in the resource set is at least N.

[0376] ■ Optionally, the CSI-RS and / or CSI-IM occasion (for interference measurement) are targeted at least N CSI-RS and / or CSI-IM resources in the resource set.

[0377] ■ Optionally, the CSI-RS and / or CSI-IM occasion (for interference measurement) is that the number of CSI-RS and / or CSI-IM resources in the resource set is at least N.

[0378] ■ Optionally, the CSI-RS transmission occasion is no later than the CSI reference resource. For example, the CSI-RS transmission occasion is a CSI-RS transmission occasion no later than the CSI reference resource.

[0379] ■ Optionally, the CSI-RS transmitter will be in the active periods of cell DTX. For example, the CSI-RS transmission occasion is a CSI-RS transmission occasion in the cell DTX active time.

[0380] ■ Optionally, the CSI-RS transmitter is in DRX active time. For example, the CSI-RS transmission occasion is a CSI-RS transmission occasion in the DRX active time.

[0381] ■ Optionally, the CSI-RS and / or CSI-IM occasion is no later than the CSI reference resource. For example, CSI-IM occasion is CSI-RS and / or CSI-IM occasion that are no later than CSI reference resources.

[0382] ■ Optionally, CSI-RS and / or CSI-IM will be in the cell DTX active time. For example, CSI-IM occasion is CSI-RS and / or CSI-IM occasion in the cell DTX active time.

[0383] ■ Optionally, CSI-RS and / or CSI-IM may be in DRX active time. For example, CSI-IM occasion is CSI-RS and / or CSI-IM occasion during DRX active time.

[0384] ● The first condition is satisfied;

[0385] ● The second condition is satisfied.

[0386] In some cases, each of the K resources in the resource set may be configured with corresponding / associated rank restriction. Optionally, K rank restrictions may be configured. Optionally, K rank restrictions being configured may also be called resource-specific rank restriction. Optionally, the K rank restrictions may be configured by a higher-layer parameter. Optionally, K rank restrictions may be configured by the CSI reporting configuration. Optionally, the k-th resource in the K resources corresponds to / is associated with the k-th rank restriction in the K rank restrictions, where 1≤k≤K. Optionally, the CSI of a CSI-RS resource is determined based on the rank restriction corresponding to / associated with the CSI-RS resource. Optionally, the rank restriction associated with the CSI-RS resource is applicable to the determination of the CSI for the CSI-RS resource (for example, the determination of RI and / or PMI). Optionally, the rank restriction refers to the restriction on RI. Optionally, the rank restriction refers to the restriction on RI value. Optionally, the rank restriction refers to the restriction on RI and / or PMI. Optionally, the rank restriction refers to the restriction on RI and PMI corresponding to RI. Optionally, the rank restriction may be used to indicate which number of layers are not allowed or are allowed. Optionally, the rank restriction may be used to indicate which value(s) of RI are not allowed or are allowed. In the disclosure, the allowed rank(s) may be understood as: the number of allowed layer(s), or the allowed value(s) of RI. In the disclosure, the term "allowed rank" may be used interchangeably with the term "number of allowed layers" or "allowed value of RI". Optionally, the rank restriction may be determined by a parameter for indicating the rank restriction (e.g., n1-n2-codebookSubsetRestriction, or typeII-RI-Restriction, or ri-Restriction). Optionally, the parameters of a rank restriction include / form / indicate a bitmap. Here, the number of bits may also be a bit sequence. Optionally, the bitmap for rank restriction indication may be rR, ..., r1, r0. Optionally, each bit indicates / corresponds to a rank. Optionally, each bit indicates / corresponds to a value of RI. Optionally, r0may be Least Significant Bit (LSB) and rRmay be Most Significant Bit (MSB). Here, the value of R may be at least one of 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12. One of rR, ..., r1, r0is ri, where i∈{0, 1, ..., R}. When riis 0, PMI and / or RI reporting are not allowed to correspond to any precoder associated with v=i+1 layers. When riis 1, PMI and / or RI reporting are allowed to correspond to any precoder associated with v=i+1 layers. Here, v represents the values of the layers, or the value of the rank, or the number of layers.

[0387] Optionally, a rank indicator (RI) is included in the CSI. Optionally, the size of the field (e.g., RI field) for indicating the rank indicator is determined based on the allowed rank. Optionally, the size of the RI field is determined based on the number of the allowed RI values (e.g., n). Optionally, the size of the RI field is determined based on the number of the allowed RI values associated with the corresponding CSI-RS resource. Optionally, the size of the RI field is determined based on the number of the allowed RI values associated with the corresponding CSI-RS resource. Optionally, the size of the RI field may be , where n refers to the number of the allowed RI values. Optionally, The values of the rank indicator field are mapped to allowed rank indicator values with increasing / decreasing order, where '0' is mapped to the smallest allowed rank indicator value. Optionally, refer above for the determination method of the allowed rank. For example, if the rank restriction parameter associated with / corresponding to a resource indicates that the values of the allowed layers are: 1, 3, 4, then RI = 0 represents rank 1, RI = 1 represents rank 3, and RI = 2 represents rank 4.

[0388] Optionally, the size of the RI field included in the CSI may be determined based on Table 6 or Table 7, where nRIrepresents the number of the allowed RI values of the corresponding / associated resources.

[0389] Optionally, the UE reports the CSI for N resources, wherein the N resources include NRresources. Optionally, the UE may report the CSI for NRresources and the CSI for N-NRresources. Optionally, NR≥0. Optionally, NR< N. Optionally, the CSI for the N resources reported by the UE includes the CSI for NRresources. When NR=0, N resources may be in the K resources. For example, when NR=0, no particular resource(s) is mandated to be reported by the UE. Optionally, NRresources are NRresources in the K resources. Optionally, the value of NRmay be configured. Optionally, NRresources may be configured. Optionally, the value of NRand / or NRresources may be configured via CSI reporting configuration. Optionally, the resource IDs of NRresources may be configured. Optionally, when NRresources are configured, the UE reports the CSI for NRresources and the CSI for N-NRresources. Optionally, the N-NRresources are from resources other than the NRresources in the K resources. Optionally, the N-NRresources are from the K-NRresources, where the K-NRresources refer to resources other than the indicated NRresources in the K resources. For example, K resources are CSI-RS#1, CSI-RS#2, CSI-RS#3 and CSI-RS#4, where N = 3, and NRresources correspond to CSI-RS#3, the UE reports the CSI for CSI-RS#3 and the CSI for two resources from CSI-RS#1, CSI-RS#2 and CSI-RS#4. Optionally, the CRI associated with each of NRresources is not reported. Optionally, the bitwidth of the CRI field in the CSI for NRresources is 0.

[0390] The CSI reported by the UE may include one part or two parts. The CSI including only one part may be referred to as single part CSI. The two parts included in the CSI may be referred to as CSI Part 1 and CSI Part 2, respectively. Optionally, if the CSI includes only one part, the number of information bits of the CSI is fixed. Optionally, if the CSI includes two parts, the number of information bits of CSI Part 1 is fixed. Optionally, CSI Part 1 has a fixed payload size and / or is used to identify the number of information bits in CSI Part 2.

[0391] In order to decode the CSI, the base station needs to determine the size of the CSI before obtaining the specific content indicated by the CSI. Since which resources are reported is determined by the UE, and since each resource may be configured with the configuration (e.g., rank restriction and codebook configuration) for corresponding CSI computation / CSI determination, the numbers of information bits associated with the corresponding CSI fields may be different, the following method can make the number of information bits corresponding to the CSI for the selected resources the same irrespective of which resources are selected by the UE for reporting, which prevents the base station from attempting to decode based on different number of information bits corresponding to CSI, thus reducing the complexity of the base station and improving the performance of the communication system.

[0392] Optionally, the CSI associated with N resources includes CSI Part 1. Optionally, the CSI associated with N resources includes CSI Part 1 and CSI Part 2. CSI Part 1 includes the RI field. When the RI restriction corresponding to each of the K resources is indicated, the sizes of the RI fields corresponding to different resources may be different. For N-NRresources selected / reported by the UE, when different N-NRresources are selected from K-NRresources, the sizes of the RI fields associated with the N-NRresources are different and cannot be known by the base station in advance. Therefore, the UE needs to pad the reported CSI with zero(s), so that the payload size of CSI Part 1 is fixed irrespective of which N-NRresources are selected, to ensure that the base station can decode the CSI correctly.

[0393] Optionally, operations related to rank or RI field are discussed below. Optionally, the following method may be used to determine the zero padding bits in CSI part 1.

[0394] Optionally, CSI Part 1 associated with one / each of the N-NRresources is padded with zero(s) to a fixed payload size. Optionally, when a seventh condition is satisfied, CSI Part 1 associated with one / each of the N-NRresources is zero-padded to a fixed payload size. Optionally, CSI part 1 associated with the m-th (1≤m≤N-NR) resource of the N-NRresources is zero-padded to a fixed payload size. Optionally, when the seventh condition is satisfied, CSI Part 1 associated with the m-th (1≤m≤N-NR) resource of the N-NRresources is zero-padded to a fixed payload size. Optionally, when the seventh condition is not satisfied, CSI Part 1 associated with the m-th (1≤m≤N-NR) resource of the N-NRresources has no zero padding bits. Optionally, when the seventh condition is not satisfied, the number of zero padding bits of CSI Part 1 associated with the m-th (1≤m≤N-NR) resource of the N-NRresources is 0. The seventh condition is described below.

[0395] Optionally, the CSI for one or each of the N-NRresources (e.g., reported N-NRresources) includes P bits. Optionally, the CSI for the m-th resource in the N-NRresources includes Pmbits. Here, 1≤m≤N-NR. Optionally, the values of the Pmbits are all 0. Optionally, the Pmbits are all 0. Optionally, the Pmbits are zero padding bits. Optionally, Pmis determined based on the allowed ranks associated with K-NRresources and the allowed rank(s) associated with the m-th resource in the N-NRresources. Optionally, Pmis determined by the difference between the number of bits determined based on the allowed ranks associated with K-NRresources and the number of bits determined based on the allowed rank(s) associated with the m-th resource. In the disclosure, the number of the bits determined based on the allowed rank(s) may be the number of bits of RI field. Optionally, the bits may be CSI bits, or CSI information bits, or bits of CSI field. Optionally, the number of bits may be the number of bits of the RI field. Optionally, the allowed ranks associated with K-NRresources refer to the allowed ranks associated with each resource of the K-NRresources. Optionally, being based on the allowed ranks associated with K-NRresources refer to being based on the number of the allowed ranks associated with each resource of the K-NRresources. Optionally, Pmis based on / equal to Nmax-Nm. Optionally, Nmaxis determined based on the allowed ranks associated with K-NRresources. Optionally, Nmaxis determined based on the number of the allowed ranks associated with K-NRresources. Optionally, Nmaxis based on (or equal to) the maximum number of bits determined based on the allowed ranks associated with each resource of the K-NRresources. Optionally, Nmaxis based on (or equal to) the number of bits determined based on the allowed rank associated with a resource of the K-NRresources. Optionally, the resource refers to the resource with the largest number of corresponding information bits in the K-NRresources. Optionally, . Optionally, Q represents a set of {1, 2, ..., K-NR}. Optionally, Q represents a set including the K-NRresources. Optionally, Nkis the number of bits determined based on the allowed rank associated with the k-th resource in the K-NRresources. Here, 1≤k≤K-NR. Optionally, Nmis the number of bits determined based on the allowed rank(s) associated with the m-th resource in the N-NRresources. Optionally, refer above for the method of determining the corresponding number of information bits for indicating RI based on the allowed rank(s). For example, , where nkrefers to the number of the allowed RI value(s) corresponding to the k-th resource, or nkrefers to the number of the allowed rank(s) corresponding to the k-th resource. For example, Nkis determined based on Table 6 or Table 7, where nRIrefers to the number of the allowed RI values corresponding to the k-th resource, or nRIrefers to the number of the allowed rank(s) corresponding to the k-th resource. For example, , where nmrefers to the number of the allowed RI values corresponding to the m-th resource, or nmrefers to the number of the allowed ranks corresponding to the m-th resource. For example, Nmis determined based on Table 6 or Table 7, where nRIrefers to the number of the allowed RI value(s) corresponding to the m-th resource, or nRIrefers to the number of the allowed rank(s) corresponding to the m-th resource. Optionally, the CSI for N resources is CSI part 1. Optionally, the CSI for N resources is wideband CSI. Optionally, the size of the RI field included in the CSI for the m-th resource in the N-NRresources may be Nmax. Optionally, the Pmbits determined by the above method / operation are in the RI field for the m-th resource. Optionally, the Pmbits determined by the above method / operation are before / after the RI field for the m-th resource. Optionally, the Pmbits determined by the above method / operation are at the beginning / end of the RI field for the m-th resource. Optionally, the Pmbits determined by the above method / operation are the last / first Pmbits of the RI field for the m-th resource. This method enables the base station to determine the positions of zero padding bits, so as to determine the positions of other information bits for decoding, avoiding the use of wrong information and improving the reliability of the communication system. When a seventh condition is satisfied, the above method / operation may be used, wherein the seventh condition includes at least one of the followings:

[0396] ● K rank restrictions are configured;

[0397] ● NRresources are configured;

[0398] ● the CSI for N resources is CSI part 1;

[0399] ● the CSI for N resources is wideband CSI;

[0400] ● the CSI for N-NRresources is CSI part 1;

[0401] ● the CSI for N-NRresources is wideband CSI;

[0402] ● N-NR> 0;

[0403] ● the CSI report is an aperiodic CSI report.

[0404] Optionally, the CSI for one or each of N-NRresources (e.g., reported N-NRresources) includes P bits. Optionally, the CSI for the m-th resource in the N-NRresources includes Pmbits. Here, 1≤m≤N-NR. Optionally, the Pmbits are all 0s. Optionally, the Pmbits are zero padding bits. Optionally, the Pmis determined based on the allowed ranks associated with N-NRresources and the allowed rank associated with the m-th resource. Optionally, Pmis determined by the difference between the number of bits determined based on the allowed ranks associated with N-NRresources and the number of bits determined based on the allowed rank associated with the m-th resource. Optionally, the number of bits may be the number of CSI bits. Optionally, the number of bits may be the number of bits of the RI field. Optionally, the allowed ranks associated with N-NRresources refer to the allowed ranks associated with each resource of the N-NRresources. Optionally, Pmis based on / equal to Nmax-Nm. Optionally, Nmaxis determined based on the allowed ranks associated with N-NRresources. Optionally, Nmaxis equal to the maximum number of bits determined based on the allowed ranks associated with each resource of the N-NRresources. Optionally, . Here, Q represents the set of {1, 2, ... , N-NR}. Nmis the number of bits determined based on the allowed rank associated with the m-th resource in the N-NRresources. Optionally, refer above for the method of determining the corresponding number of information bits for indicating RI based on the allowed rank. For example, , where nmrefers to the number of the allowed RI values corresponding to the m-th resource, or nmrefers to the number of the allowed ranks corresponding to the m-th resource. For example, Nmis determined based on Table 6 or Table 7, where nRIrefers to the number of the allowed RI values corresponding to the m-th resource, or nRIrefers to the number of the allowed ranks corresponding to the m-th resource. Optionally, the CSI for N resources is CSI part 1. Optionally, the CSI for N resources is subband CSI. When the seventh condition is satisfied, the above method / operation may be used. Optionally, the Pmbits determined by the above method / operation are in the RI field of the m-th resource. Optionally, the Pmbits determined by the above method / operation are at the beginning / end in the RI field of the m-th resource. Optionally, the Pmbits determined by the above method / operation are at the beginning / end of the RI field of the m-th resource. This method enables the base station to determine the positions of P bits, so as to determine the positions of other information bits for decoding, avoiding the use of wrong information and improving the reliability of the communication system.

[0405] Optionally, CSI Part 1 associated with the N-NRresources are zero-padded to a fixed payload size. Optionally, when the seventh condition is satisfied, CSI Part 1 associated with the N-NRresources are zero-padded to a fixed payload size. Optionally, the seventh condition is described above.

[0406] Optionally, the CSI for N-NRresources (e.g., reported N-NRresources) includes P bits. Optionally, the P bits are all 0. Optionally, the values of the P bits are all 0s. Optionally, the P bits are zero padding bits. Optionally, P is determined based on the allowed ranks associated with the K-NRresources and the allowed ranks associated with the N-NRresources. Optionally, P is determined by the difference between the number of bits determined based on the allowed ranks associated with the K-NRresources and the number of bits determined based on the allowed ranks associated with the N-NRresources. Optionally, the number of bits may be the number of CSI bits. Optionally, the number of CSI bits may be the number of bits corresponding to the CSI field. Optionally, the CSI field includes at least one of RI field, PMI field, CQI field and LI field. Optionally, the allowed ranks associated with the K-NRresources refer to the allowed ranks associated with each resource of the K-NRresources. Optionally, the allowed ranks associated with the N-NRresources refer to the number of the allowed ranks associated with each resource of the N-NRresources. Optionally, P is based on (or equal to) Nmax-N'. Nmaxmay be the maximum number of bits associated with K-NRresources. N' may be the summation of the number of bits associated with the N-NRresources in the K-NRresources. Optionally, the N-NRresources are reported resources.

[0407] ● Optionally, Nmaxis determined based on the allowed ranks associated with K-NRresources. Optionally, Nmaxis based on (or equal to) the summation of the N-NRlargest number of bits among the numbers of bits determined based on the allowed rank(s) associated with each resource of the K-NRresources. Optionally, Nmaxis the summation of the number of bits determined based on the allowed rank(s) associated with each resource of the N-NRresources in the K-NRresources. Optionally, the N-NRresources refer to the N-NRresources with the largest number of corresponding information bits of the K-NRresources. Optionally, the N-NRresources refer to the N-NRresources in the K-NRresources that maximize the summation. Optionally, , where S represents a set including the K-NRresources. Optionally, S' represents a set including N-NRresources. Optionally, , where NSis the number of bits determined based on the allowed ranks(s) associated with the s-th resource in the N-NRresources. Here, 1≤s≤N-NR. Here, N-NRresources refer to N-NRresources in S'. Optionally, refer above for the method of determining the corresponding number of information bits for indicating RI based on the allowed rank(s). For example, , where nsrefers to the number of the allowed RI values corresponding to the s-th resource, or nsrefers to the number of the allowed ranks corresponding to the s-th resource. For example, Nsis determined based on Table 6 or Table 7, where nRIrefers to the number of the allowed RI value(s) corresponding to the s-th resource, or nRIrefers to the number of the allowed rank(s) corresponding to the s-th resource.

[0408] ● Optionally, . Optionally, Nmis the number of bits determined based on the allowed rank(s) associated with the m-th resource in the N-NRresources. Here, 1≤m≤N-NR. Optionally, the N-NRresources refer to the reported N-NRresources. Optionally, the N-NRresources refer to the N-NRresources for which corresponding CSI is reported. Optionally, Nmis the number of bits determined based on the allowed rank associated with the m-th resource in the N-NRresources. Optionally, refer above for the method of determining the corresponding number of information bits for indicating RI based on the allowed rank(s). For example, , where nmrefers to the number of the allowed RI value(s) corresponding to the m-th resource, or nmrefers to the number of the allowed rank(s) corresponding to the m-th resource. For example, Nmis determined based on Table 6 or Table 7, where nRIrefers to the number of the allowed RI value(s) corresponding to the m-th resource, or nRIrefers to the number of the allowed rank(s) corresponding to the m-th resource.

[0409] When the seventh condition is satisfied, the above method / operation may be used. Optionally, the CSI for N resources is CSI part 1. Optionally, the CSI for N resources is wideband CSI. Optionally, the P bits determined by the above method / operation are before / after the CSI for N-NRresources. Optionally, the P bits determined by the above method / operation are at the beginning / end of the CSI for N-NRresources. Optionally, the P bits determined by the above method / operation are the last / first P bits of the CSI for N-NRresources. This method enables the base station to determine the positions of P bits, so as to determine the positions of other information bits for decoding, avoiding the use of wrong information and improving the reliability of the communication system.

[0410] Optionally, an operation related to the CSI field are discussed below. Optionally, the following method is applicable to the determination of zero padding bits in the CSI including only one part.

[0411] Optionally, the CSI associated with N resources includes one CSI part. Optionally, the CSI associated with N resources only includes one CSI part. Optionally, the CSI payload carried by the PUCCH are the same. Optionally, the CSI payload carried by the PUCCH are the same irrespective of RI and / or CRI.

[0412] Optionally, the CSI may include the CSI field (e.g., at least one of RI field, PMI, CQI field and LI field). Optionally, when the RI restriction corresponding to each of the K resources is indicated, the sizes of the RI fields corresponding to different resources may be different. In addition, when the RI restriction corresponding to each of the K resources is indicated, the values of the allowed ranks for determining the sizes of the corresponding CSI fields corresponding to different resources may be different. For N-NRresources selected / reported by the UE, when different N-NRresources are selected from the K-NRresources, the sizes of the CSI fields associated with the N-NRresources are different and cannot be known by the base station in advance. Therefore, the UE needs to zero-pad the reported CSI, so that the payload size of the CSI is fixed irrespective of which N-NRresources are selected, to ensure that the base station can decode the CSI correctly.

[0413] Optionally, the CSI associated with one / each of the N resources is padded with zero(s) to a fixed payload size. Optionally, when a ninth condition is satisfied, the CSI associated with one / each of the N resources is zero-padded to a fixed payload size. Optionally, the CSI associated with the m-th (1≤m≤N) resource of the N resources is zero-padded to a fixed payload size. Optionally, when the ninth condition is satisfied, the CSI associated with the m-th (1≤m≤N) resource of the N resources is zero-padded to a fixed payload size. Optionally, the CSI associated with the m-th (1≤m≤N) resource of the N resources includes zero padding bits. Here, the description for N resources can be also applicable to N-NRresources.

[0414] Optionally, the CSI for one or each of N-NRresources (e.g., reported N-NRresources) includes P bits. Optionally, the CSI for the m-th resource in the N-NRresources includes Pmbits. Here, 1≤m≤N-NR. Optionally, the Pmbits are all 0s. Optionally, the Pmbits are zero padding bits. Optionally, Pmis determined based on a first number and a second number. Optionally, Pmis equal to the difference between the first number (Nmax) and the second number (Nreported,m). Optionally, Pm= Nmax- Nreported,m.

[0415] ● Optionally, the first number is determined based on the number of bits associated with each resource of the K-NRresources. Optionally, the first number is the largest number among the numbers of bits associated with each resource of the K-NRresources. Optionally, the first number is the number of bits associated with one resource of the K-NRresources, wherein the number of bits associated with the resource is the largest among the numbers of bits associated with each resource of the K-NRresources. Here, the bits may be CSI information bits.

[0416] ● Optionally, the second number is the number of associated bits of the m-th resource. Optionally, the second number is the number of reported bits associated with the m-th resource. Optionally, the second number is the number of bits determined based on the CRI corresponding to the reported m-th resource and / or the reported rank corresponding to / associated with the m-th resource. Here, the bits may be CSI information bits.

[0417] Optionally, the CSI information bits include at least one of the followings: information bits of RI field, information bits of PMI field, information bits of CQI field and information bits of LI field. Optionally, the number of the CSI information bits is equal to / based on the summation of the followings: the number of bits of RI field, the number of bits of PMI field, the number of bits of CQI field, and the number of bits of LI field. Here, C(k) represents the number of the CSI information bits corresponding to / associated with resource #k. Here, resource #k can be understood as the resource corresponding to the value k of CRI. Optionally, CRI k corresponds to resource #k+1. Optionally, C(k) = NRI(k). Optionally, C(k) = NRI(k)+ B(rk). Here, NRI(k) represents the number of bits of RI field corresponding to / associated with resource #k. Here, B(rk) represents the number of the CSI information bits determined based on the rank rkcorresponding to / associated with resource #k. Optionally, rkmay be the value of the rank corresponding to resource #k. Optionally, B(rk) may be equal to the summation of at least one of the followings: NPMI(rk), NCQI(rk), NLI(rk). Optionally, B(rk) = NPMI(rk) + NCQI(rk) + NLI(rk). The meaning and determination method of the above parameters are described below.

[0418] Optionally, NRI(k) refers to the number of bits determined based on the rank corresponding to resource #k. Optionally, NRI(k) refers to the number of bits determined based on the number of the allowed rank(s) corresponding to resource #k. Optionally, NRI(k) may be determined based on Table 6 or Table 7, where nRIrefers to the number of the allowed RI value(s) corresponding to resource k, or nRIrefers to the number of the allowed rank(s) corresponding to resource #k. Optionally, NRI(k) = , where nkrepresents the number of the allowed RI value(s) corresponding to resource #k, or nkrefers to the number of the allowed rank(s) corresponding to resource #k.

[0419] Optionally, NPMI(rk) represents the number of bits of PMI field corresponding to / associated with resource #k. Optionally, NPMI(rk) refers to the number of bits determined based on the value rkof RI corresponding to resource #k. Optionally, if PMI is reported and / or the number of CSI-RS ports is 2, NPMI(1)=2. Optionally, if PMI is reported and / or the number of CSI-RS ports is 2, NPMI(1)=1. Optionally, if PMI is not reported and / or the number of CSI-RS ports is 2, NPMI(1)=0. Optionally, NPMI(rk) = NPMI,i1(rk) + NPMI,i2(rk). Optionally, NPMI,i1(rk) represents the number of bits for i1 corresponding to / associated with resource #k. Optionally, NPMI,i2(rk) represents the number of bits for i2 corresponding to / associated with resource #k. Optionally, if PMI i1 is reported, NPMI,i1(rk) may be determined based on Table 4 or Table 5. Optionally, in Table 4 or Table 5, the rank refers to the rank (for example, rk) corresponding to / associated with resource #k. Optionally, if PMI i2 is reported, NPMI,i2(rk) may be determined based on Table 4 or Table 5. Optionally, in Table 4 or Table 5, the rank refers to the rank (for example, rk) corresponding to / associated with resource k. Optionally, if PMI i1 is not reported, NPMI,i1(rk) = 0. Optionally, if PMI i2 is not reported, NPMI,i2(rk) = 0.

[0420] Optionally, NCQI(rk) represents the number of bits of CQI field corresponding to / associated with resource #k. Optionally, NCQI(rk) refers to the number of bits determined based on the value rkof RI corresponding to resource #k. Optionally, NCQI(rk) may be determined based on Table 6 or Table 7. Optionally, in Table 6 or Table 7, the rank refers to the rank (for example, rk) corresponding to / associated with resource #k. Optionally, if CQI is reported, NCQI(rk) is determined based on Table 6 or Table 7. Optionally, NCQI(rk) = 0. Optionally, if CQI is not reported, NCQI(rk) = 0.

[0421] Optionally, NLI(rk) represents the number of bits of LI field corresponding to / associated with resource #k. Optionally, NLI(rk) refers to the number of bits determined based on the value rkof RI corresponding to resource #k. Optionally, NLI(rk) may be determined based on Table 6 or Table 7. Optionally, in Table 6 or Table 7, v refers to the rank (for example, rk) corresponding to / associated with resource #k. Optionally, when LI is reported, NLI(rk) is determined based on Table 6 or Table 7. Optionally, NLI(rk) = 0. Optionally, if LI is not reported, NLI(rk) = 0.

[0422] Optionally, the first number refers to the largest number among numbers of bits corresponding to K-NRresources. Optionally, the first number is , where Q represents a set including K-NRresources, and k corresponds to resource #k. Optionally, . Here, Srank,kis a set of rank values rkfor resource #k that are allowed to be reported.

[0423] Optionally, the second number is Nreported,m=C(m). Optionally, Nreported,m= NRI(m)+B(Rm), where Rmrefers to the reported rank for the m-th resource.

[0424] When a ninth condition is satisfied, the above method / operation may be used, wherein the ninth condition includes at least one of the followings:

[0425] ● K rank restrictions are configured;

[0426] ● NRresources are configured;

[0427] ● the reported CSI includes only one part;

[0428] ● the CSI for N resources is wideband CSI;

[0429] ● the CSI for N-NRresources is wideband CSI;

[0430] ● N-NR> 0.

[0431] Optionally, the Pmbits determined by the above method / operation are in the RI field for the m-th resource. Optionally, the Pmbits determined by the above method / operation are after at least one of the CRI field, RI field and LI field for the m-th resource. Optionally, if LI is not reported, the Pmbits determined by the above method / operation are after the RI field for the m-th resource. Optionally, if LI is reported, the Pmbits determined by the above method / operation are after the LI field for the m-th resource. Optionally, the Pmbits determined by the above method / operation are before the PMI field of the m-th resource. Optionally, the Pmbits determined by the above method / operation are at the beginning / end of the RI field for the m-th resource. Optionally, the Pmbits determined by the above method / operation are the last / first Pmbits of the RI field for the m-th resource. This method enables the base station to determine the positions of zero padding bits, so as to determine the positions of other information bits for decoding, avoiding the use of wrong information and improving the reliability of the communication system.

[0432] Optionally, another operation related to the CSI field is discussed below. Optionally, the following method is applicable to the determination method of zero padding bits in the CSI including only one part.

[0433] Optionally, the CSI associated with N resources is padded with zero(s) to a fixed payload size. Optionally, when the ninth condition is satisfied, the CSI associated with the N resources is zero-padded to a fixed payload size. Optionally, the CSI associated with the N resources includes zero padding bits. Optionally, when the ninth condition is satisfied, the CSI associated with the N resources includes zero padding bits. Optionally, the ninth condition is described above. Here, the description for N resources can also be applicable to N-NRresources.

[0434] Optionally, the CSI for N-NRresources (e.g., reported N-NRresources) includes P bits. Optionally, the P bits are all 0s. Optionally, the values of the P bits are all 0s. Optionally, the P bits are zero padding bits. Optionally, P is determined based on a third number and a fourth number. Optionally, P is equal to the difference between the third number (Nmax) and the fourth number (Nreported). Optionally, P=Nmax-Nreported.

[0435] ● Optionally, the third number is determined based on the number of bits associated with each resource of the K-NRresources. Optionally, the third number is the summation of the largest N-NRnumbers among the numbers of bits associated with each resource of the K-NRresources. Optionally, the third number is the summation of the numbers of bits associated with N-NRresources that maximize the summation of the N-NRnumbers among the numbers of bits associated with each resource of the K-NRresources. Optionally, the third number is based on the summation of the numbers of bits associated with N-NRresources in the K-NRresources, wherein the numbers of bits associated with the N-NRresources are the number of bits associated with the largest N-NRresources among the numbers of bits associated with each resource of the K-NRresources. Here, the bits may be CSI information bits.

[0436] ● Optionally, the fourth number is the number of associated bits for N-NRresources. Optionally, the fourth number is the number of reported bits associated with N-NRresources. Optionally, the fourth number is the summation of the numbers of bits associated with N-NRresources. Optionally, the fourth number is the summation of the numbers of reported bits associated with each resource of the N-NRresources. Optionally, the N-NRresources are reported N-NRresources. Optionally, the number of bits of each resource of the N-NRresources is determined based on the corresponding CRI and / or the reported rank. Here, the bits may be CSI information bits.

[0437] Optionally, the CSI information bits include at least one of the followings: information bits of RI field, information bits of PMI field, information bits of CQI field and information bits of LI field. Optionally, the number of the CSI information bits is equal to / based on the summation of the followings: the number of bits of RI field, the number of bits of PMI field, the number of bits of CQI field, and the number of bits of LI field. Here, C(k) represents the number of the CSI information bits corresponding to / associated with resource #k. Here, resource #k may be understood as the resource corresponding to the value k of CRI. Optionally, CRI k corresponds to resource #k+1. Optionally, C(k) = NRI(k). Optionally, C(k) = NRI(k)+ B(rk). Here, NRI(k) represents the number of bits of RI field corresponding to / associated with resource #k. Here, B(rk) represents the number of the CSI information bits determined based on the rank rkcorresponding to / associated with resource #k. Optionally, rkmay be the value of the rank corresponding to resource #k. Optionally, B(rk) may be equal to the summation of at least one of the followings: NPMI(rk), NCQI(rk), NLI(rk). Optionally, B(rk) = NPMI(rk) + NCQI(rk) + NLI(rk). The meaning and determination method of the above parameters are described below.

[0438] Optionally, NRI(k) refers to the number of bits determined based on the rank corresponding to resource #k. Optionally, NRI(k) refers to the number of bits determined based on the number of the allowed rank(s) corresponding to resource #k. Optionally, NRI(k) may be determined based on Table 6 or Table 7, where nRIrefers to the number of the allowed RI values corresponding to resource k, or nRIrefers to the number of the allowed rank(s) corresponding to resource #k. Optionally, NRI(k), where nkrepresents the number of the allowed RI value(s) corresponding to resource #k, or nkrefers to the number of the allowed rank(s) corresponding to resource #k.

[0439] NPMI(rk) represents the number of bits of PMI field corresponding to / associated with resource #k. Optionally, NPMI(rk) refers to the number of bits determined based on the value rkof RI corresponding to resource #k. Optionally, if PMI is reported and / or the number of CSI-RS ports is 2, NPMI(1)=2. Optionally, if PMI is reported and / or the number of CSI-RS ports is 2, NPMI(2)=1. Optionally, if PMI is not reported and / or the number of CSI-RS ports is 2, NPMI(2)=0. Optionally, NPMI(rk) = NPMI,i1(rk) + NPMI,i2(rk). Optionally, NPMI,i1(rk) represents the number of bits for i1 corresponding to / associated with resource #k. Optionally, NPMI,i2(rk) represents the number of bits for i2 corresponding to / associated with resource #k. Optionally, if PMI i1 is reported, NPMI,i1(rk) may be determined based on Table 4 or Table 5. Optionally, in Table 4 or Table 5, the rank refers to the rank (for example, rk) corresponding to / associated with resource #k. Optionally, if PMI i2 is reported, NPMI,i2(rk) may be determined based on Table 4 or Table 5. Optionally, in Table 4 or Table 5, the rank refers to the rank (for example, rk) corresponding to / associated with resource #k. Optionally, if PMI i1 is not reported, NPMI,i1(rk) = 0. Optionally, if PMI i2 is not reported, NPMI,i2(rk) = 0.

[0440] NCQI(rk) represents the number of bits of CQI field corresponding to / associated with resource k. Optionally, NCQI(rk) refers to the number of bits determined based on the value rkof RI corresponding to resource #k. Optionally, NCQI(rk) may be determined based on Table 6 or Table 7. Optionally, in Table 6 or Table 7, the rank refers to the rank (for example, rk) corresponding to / associated with resource #k. Optionally, if CQI is reported, NCQI(rk) is determined based on Table 6 or Table 7. Optionally, NCQI(rk) = 0. Optionally, if CQI is not reported, NCQI(rk) = 0.

[0441] NLI(rk) represents the number of bits of LI field corresponding to / associated with resource #k. Optionally, NLI(rk) refers to the number of bits determined based on the value rkof RI corresponding to resource #k. Optionally, NLI(rk) may be determined based on Table 6 or Table 7. Optionally, in Table 6 or Table 7, v refers to the rank (for example, rk) corresponding to / associated with resource #k. Optionally, if LI is reported, NLI(rk) is determined based on Table 6 or Table 7. Optionally, NLI(rk) = 0. Optionally, if LI is not reported, NLI(rk) = 0.

[0442] Optionally, the third number refers to the summation of the largest N-NRnumbers among the numbers of bits corresponding to K-NRresources. Optionally, the third number is , where Q represents a set including K-NRresources and T represents a set including N-NRresources. Optionally, , where j refers to the j-th resource in the set T. Optionally, 1≤j≤N-NR. Here, C(j) refers to the number of bits corresponding to resource j. Optionally, . Here, Srank,jis a set of rank values rjfor resource j that are allowed to be reported.

[0443] Optionally, the fourth number is . Optionally, C(i)=NRI(i)+B(Ri), where Rirefers to the reported rank for the i-th resource. Here, the i-th resource refers to the i-th resource in the N-NRresources. Optionally, 1≤i≤N-NR.

[0444] When the ninth condition is satisfied, the above method / operation may be used. Optionally, the CSI for N resources is wideband CSI. Optionally, the P bits determined by the above method / operation are before / after the CSI for the N-NRresources. Optionally, the P bits determined by the above method / operation are at the beginning / end of the CSI for the N-NRresources. Optionally, the P bits determined by the above method / operation are the last / first P bits of the CSI for the N-NRresources. This method enables the base station to determine the positions of P bits, so as to determine the positions of other information bits for decoding, avoiding the use of wrong information and improving the reliability of the communication system.

[0445] The above method can make the size of zero padding field be determined based on the number of the CSI information bits corresponding to the N-NRresources with the largest number in the K-NRresources, thus saving the signaling overhead.

[0446] The present disclosure provides a method, which may enable the UE to report CSI for one or more resources at a time, so that the base station may use the beams corresponding to one or more resources for analog domain beamforming and CSI corresponding to a plurality of resources for digital domain beamforming, so that the antenna array of the base station may be used for hybrid beamforming, thus improving the flexibility of beamforming of the communication system and further improving the efficiency of the communication system.

[0447] FIG. 5 illustrates a method 500 performed by a base station according to embodiments of the present disclosure. The method 500 includes: at 501, the base station transmits a CSI reporting configuration to a user equipment, wherein the CSI reporting configuration is associated with / corresponds to or configured with a resource set including K resources; at 502, the base station receives a CSI report determined based on the CSI reporting configuration from the user equipment, wherein the CSI associated with / corresponding to the CSI reporting configuration includes RI.

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

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

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

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

[0452] 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 the two. Software modules may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, or any other form of storage media known in the art.. An exemplary storage medium is coupled to a processor to enable the processor to read and write information from / to the storage medium. In the alternative, the storage medium may be integrated into the processor. The processor and storage medium may reside in an ASIC. The ASIC may reside in the user terminal. In the alternative, the processor and the storage medium may reside as separate components in the user terminal.

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

[0454] The description set forth herein, taken in conjunction with the drawings, describes example Configurations, methods and devices, and does not represent all examples that may be realized or are within the scope of the claims. As used herein, the term "example" means "serving as an example, instance or illustration" rather than "preferred" or "superior to other examples". The detailed description includes specific details in order to provide an understanding of the described technology. However, these techniques may be practiced without these specific details. In some cases, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0455] Although this specification contains many specific implementation details, these should not be interpreted as limitations on any invention or the scope of the claimed protection, but as descriptions of specific features of specific embodiments of specific inventions. Some features described in this specification in the context of separate embodiments can also be combined in a single embodiment. On the contrary, various features described in the context of a single embodiment can also be implemented separately in multiple embodiments or in any suitable sub-combination. Furthermore, although features may be described above as functioning in certain combinations, and even initially claimed as such, in some cases, one or more features from the claimed combination may be deleted from the combination, and the claimed combination may be directed to a sub-combination or a variation of a sub-combination.

[0456] It should be understood that the specific order or hierarchy of steps in the method of the present disclosure is illustrative of an exemplary process. Based on design preferences, it can be understood that a specific order or hierarchy of steps in a method can be rearranged to achieve the functions and effects disclosed in this disclosure. The appended method claims present elements of various steps in an example order, and are not meant to be limited to the particular order or hierarchy presented, unless otherwise specifically stated. Furthermore, although elements may be described or claimed in the singular, the plural is also contemplated unless the limitation on the singular is explicitly stated. Therefore, the present disclosure is not limited to the illustrated examples, and any means for performing the functions described herein are included in various aspects of the present disclosure.

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

Claims

1.A method performed by a user equipment (UE) in a communication system, the method including:receiving, from a base station, a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration includes a configuration on a resource set including K channel state information reference signal (CSI-RS) resources;obtaining CSI associated with each CSI-RS resource of N CSI-RS resources in the resource set based on the CSI reporting configuration, in case that a report quantity parameter included in the CSI reporting configuration is set to 'cri-RI-PMI-CQI', or 'cri-RI-LI-PMI-CQI' and a parameter indicating N is configured where K>1 and 1≤N≤K; andtransmitting, to the base station, a CSI report based on the obtained CSI.2.The method of claim 1,wherein in case of the CSI reporting configuration includes K rank indicator (RI) restrictions indicating allowed value(s) of an RI for each of the K CSI-RS resources, and NRCSI-RS resource(s) in the resource set are configured, where NR≥1, wherein the CSI report includes a CSI part 1, and the CSI Part 1 associated with each of the N-NRresources is padded with zero(s) to a fixed payload size.3.The method of claim 2,wherein the CSI part 1 for the m-th CSI-RS resource in the N-NRCSI-RS resources includes Pmzero padding bits, 1≤m≤N-NR, where Pmis based on an allowed value of the RI corresponding to K-NRresources and an allowed value of the RI corresponding to the m-th CSI-RS resource in the N-NRCSI-RS resources.4.The method of claim 3,wherein the Pmis determined by the difference between a number of bits of an RI field determined based on the K-NRCSI-RS resources and a number of bits of an RI field for the m-th CSI-RS resource.5.A method performed by a base station in a communication system, the method including:transmitting, to a user equipment (UE), a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration includes a configuration on a resource set including K channel state information reference signal (CSI-RS) resources; andreceiving, from the UE, a CSI report including CSI,wherein the CSI is associated with each CSI-RS resource of N CSI-RS resources in the resource set based on the CSI reporting configuration, in case that a report quantity parameter included in the CSI reporting configuration is set to 'cri-RI-PMI-CQI', or 'cri-RI-LI-PMI-CQI' and a parameter indicating N is configured where K>1 and 1≤N≤K.6.The method of claim 5,wherein in case of the CSI reporting configuration includes K rank indicator (RI) restrictions indicating allowed value(s) of an RI for each of the K CSI-RS resources, and NRCSI-RS resource(s) in the resource set are configured, where NR≥1, wherein the CSI report includes a CSI part 1, and the CSI Part 1 associated with each of the N-NRresources is padded with zero(s) to a fixed payload size.7.The method of claim 6,wherein the CSI part 1 for the m-th CSI-RS resource in the N-NRCSI-RS resources includes Pmzero padding bits, 1≤m≤N-NR, where Pmis based on an allowed value of the RI corresponding to K-NRresources and an allowed value of the RI corresponding to the m-th CSI-RS resource in the N-NRCSI-RS resources.8.The method of claim 7,wherein the Pmis determined by the difference between a number of bits of an RI field determined based on the K-NRCSI-RS resources and a number of bits of an RI field for the m-th CSI-RS resource.9.A user equipment (UE) in a communication system, the UE including:a transceiver; anda controller configured to:receive, from a base station, a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration includes a configuration on a resource set including K channel state information reference signal (CSI-RS) resources,obtain CSI associated with each CSI-RS resource of N CSI-RS resources in the resource set based on the CSI reporting configuration, in case that a report quantity parameter included in the CSI reporting configuration is set to 'cri-RI-PMI-CQI', or 'cri-RI-LI-PMI-CQI' and a parameter indicating N is configured where K>1 and 1≤N≤K, andtransmit, to the base station, a CSI report based on the obtained CSI.10.The UE of claim 9,wherein in case of the CSI reporting configuration includes K rank indicator (RI) restrictions indicating allowed value(s) of an RI for each of the K CSI-RS resources, and NRCSI-RS resource(s) in the resource set are configured, where NR≥1, wherein the CSI report includes a CSI part 1, and the CSI Part 1 associated with each of the N-NRresources is padded with zero(s) to a fixed payload size.11.The UE of claim 10,wherein the CSI part 1 for the m-th CSI-RS resource in the N-NRCSI-RS resources includes Pmzero padding bits, 1≤m≤N-NR, where Pmis based on an allowed value of the RI corresponding to K-NRresources and an allowed value of the RI corresponding to the m-th CSI-RS resource in the N-NRCSI-RS resources.12.The UE of claim 11,wherein the Pmis determined by the difference between a number of bits of an RI field determined based on the K-NRCSI-RS resources and a number of bits of an RI field for the m-th CSI-RS resource.13.A base station in a communication system, the base station including:a transceiver; anda controller configured to:transmit, to a user equipment (UE), a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration includes a configuration on a resource set including K channel state information reference signal (CSI-RS) resources andreceive, from the UE, a CSI report including CSI,wherein the CSI is associated with each CSI-RS resource of N CSI-RS resources in the resource set based on the CSI reporting configuration, in case that a report quantity parameter included in the CSI reporting configuration is set to 'cri-RI-PMI-CQI', or 'cri-RI-LI-PMI-CQI' and a parameter indicating N is configured where K>1 and 1≤N≤K.14.The base station of claim 13,wherein in case of the CSI reporting configuration includes K rank indicator (RI) restrictions indicating allowed value(s) of an RI for each of the K CSI-RS resources, and NRCSI-RS resource(s) in the resource set are configured, where NR≥1, wherein the CSI report includes a CSI part 1, and the CSI Part 1 associated with each of the N-NRresources is padded with zero(s) to a fixed payload size.15.The base station of claim 14,wherein the CSI part 1 for the m-th CSI-RS resource in the N-NRCSI-RS resources includes Pmzero padding bits, 1≤m≤N-NR, where Pmis based on an allowed value of the RI corresponding to K-NRresources and an allowed value of the RI corresponding to the m-th CSI-RS resource in the N-NRCSI-RS resources.

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